WO1998018192A1

WO1998018192A1 - Method for logging a mobile terminal into a wireless communications system

Info

Publication number: WO1998018192A1
Application number: PCT/DE1997/002434
Authority: WO
Inventors: Günter DREIFKE; Klaus Martin; Lars Dreifke; Nils Dreifke; Sören DREIFKE; Sixten Dreifke
Original assignee: Dreifke Guenter; Lars Dreifke; Nils Dreifke; Dreifke Soeren; Sixten Dreifke; Klaus Martin
Priority date: 1996-10-22
Filing date: 1997-10-22
Publication date: 1998-04-30
Also published as: EP0878049A1

Abstract

A direct-drive system of modular construction is described, with an active unit (1) having elements for generating a variable magnetic flux, a passive unit (2) with passive modules (4) that conduct the magnetic flux and are provided with a toothed structure, a guide unit (3), and a control unit that provides electrical supply currents. The arrangements in which passive units (2) are assembled from passive modules (4) by fastening them to base structures, and the methods and devices for manufacturing them are described.

Description

Direct drive and method for producing a passive unit of a direct drive, and device for carrying out the method

The present invention relates to a passive unit for a DlrβKtantrlθb with passive elements made of magnetically conductive material, which have a structured surface of Polz Zahnβnn and Polzahnlückβn, which are attached to a rigid base body, and interact with an active unit of the direct drive.

Furthermore, the present invention provides a method for producing such a level of fit, and an apparatus for carrying out the method is described.

Recently, direct drives, for example, have become more and more common, particularly in precision engineering and device technology

15 linear or planar motors are used, the main advantage of which is the integration of several functions required for drive units in a few units. Such direct drives, like other motors that work on the electromagnetic principle, have an active

20 units and a pasaiv unit. The generation of force is achieved by the interaction of these two units, it being possible for both the active unit and the passive unit to be the motor part which is moving relative to the other unit. With a suitable constructive design, like her

25 frequently encountered with linear drives, the force-generating elements simultaneously take over the function of guiding the moving parts and also represent the frame system for any application.

30 Such a linear drive is described in German Offenlegungsschrift DE 32 08 380 AI. This is a brushless direct current linear motor, in which permanent magnets and electromagnets are used in the active unit to generate a controllable magnet.

35 are niert, while the passive unit consists of a soft iron strip provided with pole teeth. To avoid Repetitions, the content of this document is expressly included in the disclosure content and the detailed description of the functional principle of such linear motors or direct drives is omitted here. The embodiments shown in the laid-open specification predominantly use the active unit as a rotor, while the passive unit represents the part of the motor which is fixed to the frame.

A linear motor is described in US Pat. No. 4,563,602, which among other things. indicates a very simply constructed passive unit and can be designed both as a single-phase synchronous machine and as a multi-phase synchronous machine. The possibility of air storage between the active and passive unit is also previously known from this document.

It is also known from the prior art that linear motors can not only be used to produce straight-line movements in one direction. The European patent application EP 0 237 639 AI is cited as an example here, which specifies the use of the direct drive principle in a cylinder-shaped engine. For example, movements in the direction of the cylinder axis can be realized with this.

A precision direct drive has already been described in the magazine “Antriebstechnik” 33 (1994) No. 7, p. 68. There the functional principle of a permanent magnet excited two-phase reluctance step otors in hybrid technology is shown. The content of this document is also included in the disclosure, to avoid repetitions.

The direct drives known from the prior art have passive units, which for the most part consist of a basic body

Often, the passive units are switched off formed from the solid material of the base body, for example by milling.

The implementation of the specific structuring and grinding of passive units is complex, and in many cases the basic bodies are difficult to associate with processing machines due to their shape and size.

Relatively light and not so pressure-resistant base bodies do not allow structuring and final processing, so prefabrication of the pass module and then completion with the base body is the only way in this case.

For very powerful direct drives, the pass module must be made of very high quality material due to the magnetic properties. In some cases, the corrosion resistance of the functional surfaces is also important, so that passive modules are required with which improved properties of the direct drive are possible.

An object of the present invention is therefore to provide a passive unit for a direct drive, with which the disadvantages mentioned can be overcome or greatly reduced.

35 Furthermore, to a suitable manufacturing methods are provided by the present invention, can be produced with which fold to a ^¬ and cheap fashion improved passive units. This object is achieved in that the passive unit is made from passive modules which are firmly connected to the base body.

A passive module consists of a strip or a plate of soft iron, a material that conducts the magnetic flux well and has the lowest possible magnetism. Depending on the application, the relationship between price and properties must be weighed, e.g. corrosion resistance or effective machinability can also be an important criterion.

The Passrvmodulθ have the advantage that the structuring in the form of pole teeth and pole tooth gaps can be carried out in a prefabrication process before assembly. Known catfish are only applied to structures directly in the direction of movement in linear direct drives, and in planar drives the structures are introduced in the x and perpendicular directions in the y direction. 2 * ~ fs & ^ J ** ~, -fr'T ~ '? ^ΛΛ - "** ^{* Ä}

The advantage of using passive modules and their connection with basic bodies is particularly evident when at least 2 passive modules of the same type are used, which may differ in their shape, material or structure <** £.

The base body must be so resistant to bending and torsion that the dimensional stability is maintained even under mechanical or thermal loads to such an extent that a guide unit can work. The management task consists in creating a constant and small distance between active and passive. The basic body is the frame system or a part thereof, so that fastening elements are also attached here.

A common application is for linear motion, where the passive modules are attached to a cuboid as a base body on one, two, three or four long sides, usually over the entire side surface. If the Cfajfder is rectangular, the passive modules are also of different widths, but it is also possible, as a rule, to attach pass modules parallel to the widening of the functional area.

The most common version is the connection with an angular active unit, because in addition to the drive function, the frame function and the measuring standard, guidance on the straight line is also achieved. For this application in particular, cascading of passive modules can also be advantageously implemented in the direction of movement, as will be explained in more detail below.

The parallel arrangement of passages increases the achievable thrust of the direct drive, because this is essentially limited by the size of the functional area between the active unit and passages. Through series and parallel connection, 1000 N thrust is achieved at an affordable price for hybrid stepper motors.

The application is often that drive systems must also be moved completely with a passive unit, e.g. with x-y portals. Here there is a requirement for a light, yet very rigid design. According to the invention, it is therefore proposed to apply passive modules to hollow profiles, for example to hollow steel profiles, glass fiber reinforced or carbon fiber reinforced base bodies. Vibration-damping fillers in the main body have proven their worth.

Direct drives according to the invention may be due to the facilitated Aufbaufi ^β xibility very well with specific solutions combine. T- and H-shaped portals or, as suggested here, a connection between two active entities for the realization of xy- Movements can be realized even if the units are not arranged perpendicular to each other.

A Linßar direct drive is also proposed, on which 2 angular active units can operate in parallel and independently of one another over the entire driving range and, in addition, along with other independent active units.

Cost savings are achieved if one angular active unit is only connected to one passive module and the other unit attached to the angle is an air bearing.

It is further stated according to the invention that passive modules, which are precisely worked on the side, can be arranged in the direction of movement without a special additional device for positioning the passive modules. Potting compound must be added in the area of the joint between the passive modules in the pole tooth gap, and the surface level must be produced in particular when using air bearings by grinding or lapping.

Furthermore, the solution according to the invention also consists in using a device to move the p

Set the distance of 2 -PteSβr modules arranged one behind the other. A small adjustment gap then remains between the ® r "sft" Pfem ^β cmodules. The device for this is explained below.

For increased precision in the linear movement and with larger masses to be moved, it is advisable to use granite as the base body and to anchor the passive modules in a groove. Because the coefficients of expansion do not match so well, this anchoring to the surfaces is advisable. The recessing of passive modules achieves the additional advantage that the passive modules and the base body form a common, smooth surface. This makes it easier to assemble a frame which is mounted separately to accommodate additional loads, for example advantageously with additional air bearings on all 4 sides.

In the further explanations, in particular cast aluminum is proposed as the base body,

This problem 4 * «4 solved in that the passive unit has a base made of mineral casting material, to which the functional elements ^ are attached.

<ir / ^> pAf V * ~ * 4-jCt.

Such a passive unit can be manufactured with almost any external shape, the base body made of mineral casting material being able to take over all or a substantial part of the frame functions of a drive system to be constructed. Mineral casting material is easy to process, is cheap and has good chemical properties. In particular, such a material does not corrode. “Mineral casting material ^w” is understood to mean a mixture of a reactive resin-bound material based on epoxy resin in combination with additives. Suitable additives are unbroken, dried quartz grains, such as sand or gravel. Mineral casting material consists of mineral fillers and a synthetic resin lanyard.

Another advantage of a passive unit, the base body of which is made of mineral casting material, results from the very good damping properties of the mineral casting material≤. Due to their functional principle, conventional direct drives also cause vibrations in the audible range, sometimes with a large amplitude, so that in some cases considerable noise pollution is caused. Metallic bodies of passive units transmit these vibrations well and may even represent a resonance body that amplifies the noise level. Passive units made of mineral casting material dampen these vibrations significantly, so that noise pollution is significantly reduced. Furthermore, other unwanted vibrations are damped, which in certain applications leads to increased positioning accuracy of the direct drive.

One _. An advantageous embodiment is characterized in that the functional elements are cast into the mineral casting material of the base body, the structured surfaces being directed outwards and not covered by mineral casting material.

In this embodiment, it is possible to connect the functional elements to the base body in a single operation without further fastening means. Any other surface shapes of the functional elements can be achieved without any other mounting devices, since the casting mold also represents the mounting device.

In a modified embodiment, the functional elements are attached to the base body in some other way. For example, the functional elements can be glued, screwed on or attached in a similar manner. This embodiment is always advantageous when functional elements are to be attached to different positions of a standardized base body in order to adapt the respective passive unit to the specific application.

A particularly advantageous embodiment is characterized in that the base body is at least partially surrounded by an enclosure, which already serves as part of the mold for the base body during the casting process, and comprises fastening elements which can take over frame functions. For example, this enclosure can consist of a steel frame or a trough-like steel mold which remains firmly connected to the mineral casting material after the casting process, as a result of which steel elements are available at least in sections, into which holes or threads can be made or to which other fastening elements are attached can be, with which the passive unit can be adapted to any application variants.

Further fastening elements can also be poured directly into the base body, which serve for a later connection with other frame elements.

In particular in the case of large-area passive units, it may be expedient not to produce the base body completely from solid material, but instead to provide cavities in individual areas of the base body, which on the one hand can serve to accommodate external frame oil elements and on the other hand reduce the weight of the entire passive unit.

It is particularly advantageous if the coefficient of expansion of the mineral casting material is substantially equal to the coefficient of expansion of the magnetizable material of the functional elements. The coefficient of expansion of mineral casting material can be set relatively well in a certain range by suitable selection of the components. The components required are known to the person skilled in the art. However, this gives the possibility of assigning the individual elements of the passive unit an essentially equal coefficient of expansion, which means that temperature fluctuations do not lead to internal stresses, which generally lead to poorer parameters in the accuracy of the direct drives and, in the worst case, the inability to operate or the Destruction of such a drive can cause.

A particularly preferred embodiment of the passive unit is characterized in that it is connected to further assemblies of a machine and that it acts as a force-transmitting frame assembly. A passive unit is also advantageous, which is designed as part of a device and on which conventional tensioning and fastening elements are arranged, which are used to support and lock serve workpieces. With such designs, frame functions and power transmission functions are also taken over by the passive unit, which originally only served to generate force, which leads to improved system integration.

The present invention furthermore provides a method for producing such a passive unit, with the following method steps: a) an arbitrary shape which reproduces the desired base body is produced,. - ». b) raw elements made of magnetisable material that do not yet have a structuring are inserted into the mold, c) the mold is filled with mineral casting material in a casting process, d) structures consisting of pole teeth and pole tooth gaps are introduced at the desired locations of the raw elements, whereby the functional elements are formed.

This particularly preferred variant of the production process offers the possibility of providing the base body with raw elements without great technological expenditure, which are only subjected to fine machining in a later process step, the tooth structure being formed. The structure does not have to be produced on the entire surface of the raw elements, but can be limited to the desired areas.

In a modified version, a method is used to manufacture the passive unit, with the following steps: a) an arbitrary shape that reproduces the desired basic body is produced. b) the functional elements made of magnetizable material are inserted into the mold or fastened on the inside, with the structured surfaces facing outwards, c) the mold is filled with mineral casting material in a casting process.

This method offers the advantage over the prior art that, at low cost, almost any shape of base body can be provided with prefabricated functional elements, whereby passive units are available which are specially adapted to the desired application. In the application of the above two methods, the additional Arb deleted ^β itsschritt, wherein the functional elements are mounted on the base body.

In a modified process, the following process steps are carried out: Process for the production of a passive unit according to one of Claims 1 to 6, with the following process steps: a) an arbitrary shape which reproduces the desired basic body is produced, b) the mold is produced in a casting process with mineral casting compound - filled up material, c) after hardening of the base body, the functional elements made of magnetizable material are attached to it.

When using this method, the functional elements must be attached to the base body in a separate process step, but this always offers advantages if, due to the materials selected, a durable, direct connection between the mineral casting material and the magnetisi Saron. Material of the functional elements can not be guaranteed or by the additional Fasteners desired properties can be achieved. For example, a layer of adhesive arranged between the functional elements and the mineral casting material can serve to compensate for given slightly different expansion coefficients.

A modified embodiment variant of the method is characterized in that fastening elements are anchored in the casting compound of the base body before curing. It is also expedient to fill the pole gaps of the functional elements with a filling compound in a subsequent process step. If necessary, the surface quality of the functional elements can be increased by a subsequent fine grinding.

The proposed method is based on the assumption that passive module In in the form of punishments or plates are made of a suitable material and that a combination with a wide variety of basic bodies can be realized. A form is advantageously used for this purpose, with which the passive module θ are recorded on their functional surface. Magnetic or vacuum clamping means are suitable for this. The passive modules positioned in relation to one another are best glued to the base body, using self-adhesive layers that are matched to the differences to be compensated for between passive modules and base body. For linear direct drives with angular active units, a V-shaped prism with magnetic chucks is used to create the passivity. Heating elements in the mold can shorten the manufacturing process.

Although the functional properties are essentially realized after curing, grinding afterwards can still prove to be expedient.

Based on this method, longer passages are also manufactured using a device. This device consists of a facing plate on which at least 2 active units are so elastically fastened that they rest smoothly on two passive units lying one behind the other in the direction of movement of the active unit, without any significant constraining forces. By actuating the air bearing, the freely moving stator modules can align themselves with the active heights. In order to comply with the division period, the active units must either both be energized with only one and the same phase, or the current ratios in the two active units are set in the same way. The passive units can be easily positioned exactly to each other to within 0.01 mm,

The mounting ^β vorrlchtung can also be made movable in order to align the Passivmodulθ Grundkörpem in severe, then the air is turned off and the device with the passive modules can then be placed on the heavy body.

Furthermore, the process steps when using mineral casting as

Basic body explained in more detail. Here the basic body is only in connection with the

Connection to the passive module made by casting. Be in the mold

Tensioning elements introduced, the necessary flatness of the passive modulus θ is ensured. It is advantageous for casting and after curing

Passiveinhθit from the form herauattonoRmen and thus the manufacture abzucohliofto.

A grinding process, which includes the removal of soft lenses and mineral casting, is on

Due to the relatively poor grindability and often not favorable due to the size and shape of the parts. However, the passive module can also be used for certain applications

Mlneralgußköφβr protrude so that the structuring can be done after casting. In the assembled state, the pole tooth gaps are filled and then the

Functional surface made flat or ground.

Further advantages, details and further developments emerge from the following description of preferred exemplary embodiment ^'e with reference to the drawings. E ₃ show:

Flg. 1 a passive module for a linear and a passive module for a planer direct drive;

Flg. 2 two passive modules θ glued to a base body;

Figure 3 shows a Aktlvelnhelt and a Passlvβinhβit for a Unear direct drive with a hollow body.

4 shows a passive unit with which 2 active units can be moved independently;

Flg. 5 an actuating mechanism with higher thrust;

Flg. θ a variant for connecting passive modules in series;

7 shows a base body made of granite with a passive unit fastened in a groove with additional air guidance;

8 shows another variant for connecting passive modules in series using two active units for the adjustment;

9 shows an adjustment device for connecting passive modules in series in connection with clamping means;

10 shows a passive unit for a direct drive with a square base in a view from above;

X ff shows the passive unit from FIG. 1 in a partially cut-away side view; Fig. S is a detailed view of a functional element ¹ 'of

1 passive unit from FIG. 1 »; FIG. 1 shows the passive unit from FIG. 10 in a view from below; 3 shows a modified embodiment of the passive unit for a linear drive in a view from the front;

"> P

S shows the passive unit from FIG.% In a partially cut-away side view. The Flg. 1 each shows a passive module for linear direct drives and for planar direct drives and illustrates the character of the strips, preferably for linear drives and of plates for planar drives. The linear or pixel structure is recognizable. The pole tooth gaps are filled with a polymer in the case of the use of air bearings in the associated active units. The structured functional surface is flat and ground very precisely, especially with air storage.

2 shows a typical passive unit for Llnear direct drives in modular catfish. The 2 passive modules shown here are generally glued and / or additionally screwed onto the base body.

FIG. 3 shows a Llnβar direct drive with air bearings. The active unit is preferably angular to solve the management task in order to absorb forces and moments. The basic body is hollow here, especially to save mass and costs and to enable use for moving driveline in the case of high accelerations. A filler can be introduced to reduce noise.

FIG. 4 shows that 2 active units can also be moved independently of one another on a stator, in which 4 stator modules θ are used. If the two active units are elastically connected to each other perpendicular to the direction of movement, a compact, strong Aktlvelnhelt is achieved, which can be called a mub unit. The advantage over known arrangements is that only 2 right angles between the passive modules have to be correct and self-locking occurs when the air is switched off.

Fig. 5 shows another variant to increase the thrust. If you increase the functional area of strong active units, which is usually the air bearing guide with an air gap of about 15 micrometers, the requirements for the flatness of passive modules increase at the same time. However, the requirements for flatness should be reduced in order to be able to offer an inexpensive drive. In order to take advantage of working with passive modules, it is therefore better to connect smaller active units with an elastic element, as shown in the example of the cover plate. The adhesive material and the thickness of the adhesive layer should be selected so that each active unit can be guided freely and unclamped on the passive unit.

6 shows a simple variant of connecting passive modules to one another in the longitudinal direction. Exact work on the face of the planar modules is required, assuming that the modules are in contact and, of course, care must be taken to ensure that the tooth period, parallelism and flatness are maintained.

7 gives an example of the manufacture and use of a granite passive unit. The main body is provided with a groove along the route into which one or more passive modules are glued. As a result, the passive module θ holds the base body even at higher thermal loads and the achievement of a flat surface between the passive module and granite can be achieved by grinding. A motor element is thus integrated directly into a control element, which is important for the highest positioning accuracy. The picture also shows the location of the active unit. which is elastically connected to the frame by means of a spring. In this way, the moving carriage can absorb larger loads due to additional air bearings and the function of the air bearing in the active unit is excellently maintained, as a result of which a constant air bearing is achieved even under high loads. Fig. Θ shows a variant for a more precise series connection of passive modules. A connecting plate holds 2 active units at a prescribed distance and is designed to be sufficiently elastic that no significant constraining forces act on the passive module θ. If you ensure that the passive modules on the two active units can move freely in an air bearing, a defined distance between the stator modules can be set by energizing the active units, e.g. by energizing only one phase at a time. The air is then switched off, and in a second step the passive modules θ are attached to the base body.

Fig. 9 shows this method in connection with magnetic clamping means. The active units can advantageously be part of the clamping and assembly device.

10 shows a simplified representation of a passive unit 1 as used in direct drives. The passive unit shown is used for a planar drive. It has a square base and

has a functional element $ made of magneti »* ^ - 6 orba-fθ-a on its upper side. Material on. For example, the un stationsele ent 2 consists of soft iron, which, as in the embodiment shown, is attached as a thin plate or sheet to the passive unit. This soft iron plate has a structure on its top that is absolutely necessary for the functioning of a direct drive and is shown in detail in FIG. 3 v described later. The functional element S> can, as shown x, extend over the entire surface of the passive unit f or, in modified embodiments, only in individual

Areas may be provided. It is also possible to only use the

? «Fr //

Restructuring at the top of the Funlttioncelements 2 to the desired areas. The alignment of the structuring depends on the desired application and is predetermined by the directions of movement to be carried out by the assigned active unit. In the example shown, it is a cross-shaped structuring that is required for a movement of the active unit sliding along the surface of the functional element -2 "V in both the x and y direction. The passive unit shown is for a combination with an An active unit is provided, which is guided on the passive unit by an air bearing according to the prior art. Other guide variants are possible, but then require additional guide elements. Such guide elements can be formed integrally with the base body of the passive unit with a suitable shape.

Fig. Z shows a side view of the passive unit r, partially in section. The passive unit iu - further comprises a base body 3, which consists of an enclosure 4, which is arranged on the outer sides of the passive unit, and mineral casting material 5, with which the interior of the passive unit is largely filled. The mineral casting material 5 has a customary mineral composition Fillers and synthetic resins. In the example shown, the border 4 is formed by a stable steel frame, an adhesion promoter 6 being able to be attached to improve the connection between the border 4 and the mineral casting material 5. In other embodiments, however, it is also possible to provide anchoring elements or an appropriate surface roughness on the inside of the enclosure 4, which ensure a stable connection to the mineral casting material 5.

At any point in the mineral casting material 5 fastening elements 7 can be provided, the position of which is adapted to existing frame devices. The fastening elements 7 have, for example, a threaded bore 8 which is accessible from the underside of the passive unit ϊ. With the aid of the fastening elements 7, the passive unit can be attached to the frame of a corresponding device. Due to the fact that the fastening elements 7 can be placed almost anywhere within the passive unit -ϊ, simple adaptation to different frame systems is possible.

The border 4 forms with its upper edge a support surface -WJ on which the functional element 2 ^* rests. The connection between the functional element Z and the frame 4 can be made, for example, by an adhesive layer. So that the tread is as flat as possible on the upper

<f side of the functional element JZ can be made available, it is expedient to attach the functional element to the mineral casting material 5 essentially over the entire base area by means of an adhesive layer. If particularly high demands are placed on the temperature stability, the functional element Z can also be attached only to the mineral casting material 5, which in this case should have an expansion coefficient which is essentially identical to the expansion coefficient of the magnetizable material which forms the functional element . The coefficient of expansion of the mineral casting material can be in adjust in a known manner by suitable choice of materials.

In the example shown, the bezel 4 is designed as a self-contained steel ring. To adapt the passive unit 1 to a wide variety of applications, 4 further functional bores 12 can be drilled at any point on the mount. It is also possible to make a further threaded bore 13 through the casing 4, which extends into one of the fastening elements 7.

12th

Fig. 2f shows a sectional view of the functional element as a detail. The functional element has a structure that is formed from tooth teeth K and tooth gaps J T. The

Pole tooth gaps 8Λ are expediently filled with a filling compound> 4, for example an epoxy resin, as a result of which undesired deposits in the pole tooth gaps are avoided and the magnetic properties of the structuring formed are improved.

The passive unit X is shown in a view from below. During the production of the passive unit, the enclosure 4 simultaneously forms part of the mold into which the mineral casting material is introduced during the casting process. Before curing, possibly also before casting, the fastening elements 7 are introduced at the desired positions. The shape formed by the border 4 is closed on the upper side either by the already applied functional element Z. or a not yet structured raw element, whereby a direct connection between the mineral casting material 5 and this element can be achieved with a suitable choice of material. If necessary, an adhesion promoter can also be used at this connection point. In a modified production process, however, it is also possible to use corresponding auxiliary mold elements which are removed after the mineral casting material S has hardened, so that the mineral casting material is also freely accessible at the top. This is necessary if the t functional element 2 should not extend over the entire base area of the passive unit to be manufactured.

In the case of modified passive units, the bezel 4 can be completely dispensed with if removable molds are used in the manufacture of the passive unit and the frame functions of the bezel are not required. Any forms of the passive unit can thus be produced, which are adapted in detail to the respective application.

Mineral casting materials are also available, which can themselves take over frame functions, whereby the passive unit can represent the complete frame system of a direct drive to be manufactured. The functional elements

(1 2 ^* are only attached in the areas of the base body made of the mineral casting material, in which they are required as a counterpart for the active unit of the direct drive.

The Fig.n rf and j? show a modified embodiment of the passive unit, which is used in a linear drive. In the example shown, the base body 2 consists entirely of the mineral casting material 5. Again, individual fastening elements 7 are cast in the mineral casting material. Functional elements tZ are attached to two side surfaces of the base body 2r and at least partially have the described structuring. In the production of the passive units, it is particularly expedient if areas are provided in the mold in which a magnetic field is built up, which positions the raw elements or the functional elements in the mold and fixes the duration of the curing time for 5. This makes it possible to achieve high flatness of the structured running surfaces to be generated in the ¹ result.

The elements to be fixed are placed on the designated areas. A relatively strong magnetic field is then built up, for example by means of 10 electromagnets, as a result of which attractive forces are exerted on the inserted magnetizable materials, with which they are aligned and fixed in the desired position.

16 shows a basic body in connection with fitting modules, such as can also be used, for example, for planer movements. The y-drive _θ bsmodulθ and the x-drive module shown are elastically connected,

Claims

23

ö t £ «~ js. '> c * ti- - ^ e _{^ f} '

Third

! , _* * ~ fi ^« ~ s ~ ^j t, ^ ^{* ■ *} . .

C.

A * ~ ^ _ w ^ f A '<.

/ fe> - Linoar drive according to one of Claims 13 to X, characterized in that two identical active units (1, 35) arranged perpendicular to one another interact with a passive unit (2) which comprises two magnel-isiorbarc / magno ische areas arranged perpendicular to one another - (42 -, - 11-).

^/ t <* ^c 'linear drive according to one of claims 13 to -9 ", characterized in that several active and passive units cooperate in such a way that a drive which can be moved in the X direction and in the Y direction results.

? 6d. Liftar drive according to one of claims 1 * to Jrβ ^* , characterized in that the guide unit is formed by an air bearing (3).

⁽ > -C- Üaea-ϊ drive according to claim JT, characterized in that in the active unit (1) air nozzles (4) are provided through which compressed air escapes, whereby an air cushion (3) is built up between the active unit and the passive unit. Method for producing a passive unit (2) of a linear drive, which consists of a base body (IQ) with extensive ^ magnetisiΘrbaι; ύn i.idci; —magnetioche —Bautoilo —WrS -? —- 31) forming the tread of the passive unit following process steps: a) the extensive magnetic / magnetizable ^ A /.*&- I1 * ηf * «{ ^c components (12, 31) are manufactured; , _/ b) these building parts are placed with the side forming the surface in a reusable form (41) and temporarily locked there; c) a suitable adhesive is applied to the side of the components facing the base body; d) the LGiαhtbau round body is applied to the adhesive-coated side of the components;

"/ δa ~.

e) after. After the adhesive has hardened, the base body with the components is removed from the mold.

characterized by that

de Construction of the mold takes place by generating a magnetic field, whereby the components are magnetically drawn into the mold.

ΛΛ. Method according to claim J-4, characterized in that the magnetic field is generated in the form by electromagnets only after the components have been inserted, and is shaded again before the spawning body is removed.

-3τ6 \ Device (40) for producing a passive unit (2) of a linear drive, which consists of a base body (10) with extensive, magnetizable or — magΛ-.tiscr.en- components forming the tread of the “passive unit”. ) consists of: * a form (41) in which the extensive, magnetizable magnoti already. Components (12) can be inserted temporarily and in which a magnetic field can be built up at least in sections in such a way that the magnetizable magnetic components (12) are drawn into the mold,

* A recording area, which is used for the temporary reception, positioning and holding of the base body during the connection process between base body and components.

11 Zύ

• ϊr? , Device according to claim it, characterized in that controllable electromagnets (42) are arranged which generate the magnetic field for attracting the components (12).

? f. Method for producing a passive unit for a direct drive, with the following method steps: a)

b)

gladly - material that has not yet been structured, c) the mold is filled with mineral casting material (5) in a casting process,

Pole teeth (14) and pole tooth gaps (15) existing structures introduced, whereby the -FunctionaClemente (2) are formed.

Direct drive, with the following process steps: a) an arbitrary shape depicting the desired basic body (3) is produced, _Λ,, b) the function αclemcnte (2) are made into the shape

") magnetically inserted, if a material is used, with the structured surfaces facing outwards,

c) the mold is filled with mineral casting material (5) in a casting process.

marked-

ne, ae 01 = jt Fjjj C ^ βr £ 35Be ernen e by building up a magnetic field., be positioned and fixed in the mold until the mineral casting material (5) has substantially hardened.

/ £. Process for the production of a passive unit for a direct drive, with the following process steps: a) an arbitrary shape which depicts the desired basic body (3) is produced, b) the mold is filled with mineral casting material (5) in a casting process, c) after The functional elements (2) * ns— ayu Lib i — conductive conductivity are hardened on the base body

a magnetic field is built up, by means of which the radio pin sensor (2) is positioned and temporarily fixed before being attached to the base body (3).

U Zr 3η i. Method according to one of claims to 2T, characterized in that the mold is removed from the base body (3) after curing.

33 ^Z ** 5. The method according to any one of claims to 13, characterized in that anchoring elements (6) are attached to the mold before casting the base body (3), which prevent the mold from loosening after the mineral casting material (5) has hardened .

2 Zr 33 &. Method according to one of claims to ^, characterized in that before the hardening fastening elements (7) in the mineral casting material (5) of the base body (3) are anchored.

ST IT 3f y \. Method according to one of claims & to 'Js6, characterized in that in a further method step the pole tooth gaps' (15) of the junior elements (2) are filled with a filling compound (16).

Jr #. Method according to claim fk / T, characterized in that an epoxy resin is used as the filling compound (16).

y $. Method according to one of claims / $ to%, characterized in that in a further process step

? *. '*'% _Λ ΛΛ te _* ~~ tΛ _* .te, (M l the attached FunktJonaelemonte 2 be sanded on their structured surface.

2tf. Device for producing a passive unit for one

Direct drive, characterized in that in one

Mold areas are provided in which a magnetic field can be built up, which the positioning and

Sat **.

Fixing the functional elements (2) in the mold is used.