CN103433882B - A kind of control method of current feedback type numerical control electric screw driver - Google Patents
A kind of control method of current feedback type numerical control electric screw driver Download PDFInfo
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- CN103433882B CN103433882B CN201310389500.4A CN201310389500A CN103433882B CN 103433882 B CN103433882 B CN 103433882B CN 201310389500 A CN201310389500 A CN 201310389500A CN 103433882 B CN103433882 B CN 103433882B
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Abstract
The invention discloses a kind of current feedback type numerical control electric screw driver, including control chamber and screwdriver, control chamber is connected by controlling cable with screwdriver, controller and Switching Power Supply it is provided with in control chamber casing, being provided with motor, motor reduction gearbox and drive shaft in screwdriver cylinder, cylinder is respectively arranged at two ends with adapter and batch nozzle.A kind of control method of current feedback type numerical control electric screw driver, after being to start, corner and moment of torsion are detected by controller respectively, and preferentially select to carry out screw occlusion, Quick fastening, screw locking or standby step according to moment of torsion, controller has fault detection capability simultaneously, selects to enter standby step, keep standby step or start screwdriver lock function at sliding tooth or floating two kinds of malfunctions of lock when occurring.The present invention have automatically control, the several functions such as data management and monitoring mistake proofing, and efficiently, conveniently, safely, be a kind of energy high-quality numerical control electric screwdrivers of meeting difference processing needs.
Description
Technical field
The present invention relates to a kind of screwdriver, the control method of a kind of current feedback type numerical control electric screw driver.
Background technology
Screwdriver is the instrument for the turn of the screw, has obtained commonly used in the production and life of people.China is manufacturing powerhouse, and along with the development of the industries such as automobile, space flight, machinery, the automatic control level improving screwdriver becomes development trend.While screwdriver realizes Automated condtrol, Torque Control precision and intelligence to screwdriver require also improving constantly, and the control accuracy of product moment is the highest, it is possible to be preferably applied in the middle of the assembling to various precision parts.
Screwdriver the most on the market is broadly divided into three kinds, and the first is mechanical clutch structure, and structure is complicated, precision is relatively low, maintenance cost is high, and the second is the structure of band torque sensor, and precision is the highest but expensive, the third uses current type structure, precision is high, simple in construction, no material consumption, environmental protection, thus be used widely.nullIn existing electric screw driver，Application publication number is that the invention of CN102794732A provides a kind of screwdriver，It has the driving means including motor，Described motor Rhizoma Nelumbinis is connected to drive shaft to drive the instrument driving operation for completing screw with predetermined tightening torque，Described chasing tool has the current sensor for detecting current of electric，There is the control device for controlling driving means，Control device and be designed to the brake when reaching Brake Standards，And calculate the threshold value of current of electric to determine switching standards and changing to holding state based on predetermined tightening torque，This electric screw driver precision is higher，But do not possess monitoring error-disable function，Function singleness，Can not fully meet diversified processing needs，Simultaneously the aspect such as the speed controlling during the turn of the screw also needs to improve preferably to improve work efficiency.
Summary of the invention
For the deficiencies in the prior art, the present invention provides the control method of a kind of current feedback type numerical control electric screw driver, can realize automatically controlling, the function such as data management and monitoring mistake proofing, precision is high, easy to use, safe and reliable, adapting to different processing needs and improves work efficiency.
nullThe technical scheme is that a kind of current feedback type numerical control electric screw driver，Including control chamber and screwdriver，Described control chamber is connected by dismountable control cable with screwdriver，It is characterized in that: described control chamber includes casing，Described casing is provided with on and off switch、External power interface、Cable interface and display screen，Controller and Switching Power Supply it is provided with in casing，Controller includes microprocessor、Memorizer、Motor drive module and display module，Described microprocessor respectively with memorizer、Motor drive module and display module circuit connect，Motor drive module is connected with cable interface circuit，Display module is connected with display screen circuit，Switching Power Supply is connected with on and off switch and external power interface circuit respectively，Described screwdriver includes cylinder，Connected motor it is provided with in cylinder、Motor reduction gearbox and drive shaft，Cylinder is respectively arranged at two ends with adapter and batch nozzle，Criticize nozzle to be connected with drive shaft.
It is provided with filtration module in described Switching Power Supply.
There is in described motor the position sensor of at least one detection rotor-position.
Preferably, described position sensor is Hall element.
Described motor is non-carbon brush motor.
Described casing is provided with signal output interface, PC communication interface and the usb data interface being connected with controller circuitry.
The axial compressive force mechanism being regulated each screw by axial guidance and spring it is provided with outside described cylinder.
Described controller and signal lights connection, signal lights is positioned at outside casing, for sending corresponding early warning signal in the sliding malfunction such as tooth or floating lock.
A kind of control method of current feedback type numerical control electric screw driver, operation is driven for driving batch nozzle to complete screw by controller, it is characterized in that: need to set moment of torsion and the desired value of corner, higher limit and lower limit according to processing, after startup, corner and moment of torsion are detected by controller respectively, and carry out following steps according to moment of torsion:
-screw occlusion step, Non-follow control or be provided by the controller of startup time and make to press alignment screw cap under batch nozzle, after startup, controller detects moment of torsion by motor current signal, position sensor detection motor position of rotation also provides corner current signal to controller, feed current to motor by controller reach and keep lower-speed state (as kept 100-300), until controller detects predetermined corner one；
-Quick fastening step, controller carries out electric current feeding and makes motor be turned at a high speed by low speed, until controller detects predetermined corner two, motor is made to keep high-speed rotation again, until controller detects predetermined corner three, then controller carry out electric current feeding and make motor by high speed steering low speed, until controller detects predetermined corner four；
-screw locking step, controller carries out electric current feeding and makes motor keep lower-speed state, until controller detects target torque and target rotation angle, now will send and tighten signal；
-standby step, Non-follow control or make batch nozzle depart from screw cap by controller, controller will still keep the electric current feeding of specific degrees or stop electric current feeding；
The numerical value of described predetermined corner one, two, three, four is all proportional with the numerical value of target rotation angle；
Described controller has the functions such as data record and inquiry, for parameters such as record and query time, corner, moment of torsion and speed；
When mechanical disorder, screw hole is bad, screw is bad and the factor such as workpiece specific materials can increase fault rate: be processed wooden workpiece, plastics part, sheet metal, or during screwed hole pine, it is easily caused screw slippage or idle running and forms sliding dental phenomenon, when screwed hole is tight or screw is bad, then be easily caused unlocked on earth or tighten rear bad order and form floating lock status；
Described controller has fault detection capability, for detecting sliding tooth or two kinds of malfunctions of floating lock, when sliding dental phenomenon refers to arrive target rotation angle, controller is still not detected by target torque thus without tightening signal (as caused away from bad) by screw thread, floating lock status refers to when signal is tightened in arrival target torque generation, controller is still not detected by target rotation angle (as tightly caused resistance to strengthen by workpiece screw hole), and controller can have floating lock sensing function further；
Carrying out screw locking step or standby step all may detect that sliding dental phenomenon, and aforementioned four step all may detect that floating lock status, select to enter standby step, keep standby step or start screwdriver lock function, and exportable corresponding early warning signal, releasing screwdriver lock-out state then needs user to input password on a display screen.
The invention have the benefit that
1, there is good man machine operation interface, achieve the Automated condtrol of height, the assembling field of auto parts and components, space flight assembly or precision optical machinery can be advantageously applied to, the parameters such as moment of torsion, time, speed, corner, direction of rotation can be preset by display screen, support more than 6 kinds the mission mode of demand of assembling, achieve the speed controlling in rundown process, relatively prior art and significantly improve work efficiency.
2, possesses programmable functions, can need to set corresponding program according to different processing, program storage function is realized by memorizer, it is provided simultaneously with data record, inquiry and export function, can the related data such as instant playback moment of torsion, corner, by the analysis to rundown process data, parameters can be optimized further to obtain best processing effect.
3, there is monitoring error-disable function, can accurately detect and record sliding tooth or two kinds of malfunctions of floating lock, and there is screwdriver lock function, safer reliably, also can outer signal lamp, and realize the multiple modes of warnings such as sound, color, word.
4, non-carbon brush motor and Hall element it are configured with, precision is high, non-maintaining, easy to use, be provided with the flexibility design such as axial compressive force mechanism, promote safety, be also equipped with outside startup, tighten circulated, the function such as password locking on the signal input/output function such as screwdriver fault and display screen, diverse in function, fully adapts to difference processing needs.
Accompanying drawing explanation
Fig. 1 is the structural representation of control chamber of the present invention.
Fig. 2 is the structural representation of screwdriver of the present invention.
Relation between moment of torsion, speed and corner that Fig. 3 illustrates in the present invention in different step.
Fig. 4 illustrates the relation under sliding dental phenomenon between moment of torsion and corner.
Fig. 5 illustrates the relation under floating lock status between moment of torsion and corner.
In figure, 1-casing, 2-Switching Power Supply, 3-controller, 4-display screen, 5-cylinder, 6-motor, 7-motor reduction gearbox, 8-drive shaft, 9-criticizes nozzle, 10-adapter.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
A kind of current feedback type numerical control electric screw driver, including control chamber and screwdriver, control chamber is connected by dismountable control cable with screwdriver, as shown in Figure 1, control chamber includes casing 1, casing 1 is provided with on and off switch, external power interface, cable interface and display screen 4, is provided with controller 3 and Switching Power Supply 2, the built-in filtration module of Switching Power Supply 2 in casing 1；
Controller 3 includes microprocessor, memorizer, motor drive module and display module, microprocessor is connected with memorizer, motor drive module and display module circuit respectively, motor drive module is connected with cable interface circuit, display module is connected with display screen 4 circuit, and Switching Power Supply 2 is connected with on and off switch and external power interface circuit respectively；
Signal output interface, PC communication interface and usb data interface circuit that controller 3 is provided with casing 1 the most respectively are connected, and to realize data management function, the signal lights connection outside controller 3 and casing 1, for realizing the warning function under malfunction；
As shown in Figure 2, screwdriver then includes cylinder 5, connected motor 6, motor reduction gearbox 7 and drive shaft 8 it is provided with in cylinder 5, motor 6 is non-carbon brush motor 6, and in motor 6, it is provided with the Hall element of 3 detection rotor-positions, cylinder 5 is respectively arranged at two ends with adapter 10 and batch nozzle 9, and batch nozzle 9 is connected with drive shaft 8.
When being embodied as, the control method of the present invention, it is that driving batch nozzle 9 to complete screw by controller 3 drives operation, first need to set moment of torsion and the desired value of corner, higher limit and lower limit according to processing, after startup, corner and moment of torsion are detected by controller 3 respectively, and preferentially select to carry out screw occlusion, Quick fastening, screw locking or standby step according to moment of torsion:
As shown in Figure 3, in screw occlusion step, controller 3 feeds current to motor 6 and reaches and keep lower-speed state, until controller 3 detects predetermined corner one, in Quick fastening step, controller 3 carries out electric current feeding and makes motor 6 be turned at a high speed by low speed, until controller 3 detects predetermined corner two, motor 6 is made to keep high-speed rotation again, until controller 3 detects predetermined corner three, then controller 3 carries out electric current feeding and makes motor 6 by high speed steering low speed, until controller 3 detects predetermined corner four, in screw locking step, controller carries out electric current feeding and makes motor 6 keep lower-speed state, until controller 3 detects target torque and target rotation angle, now will send and tighten signal and enter standby step.
When being embodied as, when mechanical disorder, screwed hole is bad, screw is bad and the factor such as workpiece specific materials can increase fault rate and cause sliding tooth or two kinds of malfunctions of floating lock:
As shown in Figure 4, sliding dental phenomenon refers to that controller is still not detected by target torque when arriving target rotation angle thus without tightening signal, relative to standard curve, different torque curves is corresponding to different sliding dental phenomenons, as can be formed sliding dental phenomenon (1) (not up to torque targets value) not by thickness of workpiece, or by screw thread away from the bad sliding dental phenomenon (2) (not up to torque targets value) that formed, or sliding dental phenomenon (3) (not up to lower torque limit value) can be formed by workpiece screw hole pine；
As shown in Figure 5, floating lock status refers to when signal is tightened in arrival target torque generation, controller 3 is still not detected by target rotation angle, relative to standard curve, different torque curves is corresponding to different floating lock statuss, as tightly can formed floating lock status (4) (not up to corner desired value) by workpiece screw hole.
Can select when controller 3 detects fault to enter standby step, keep standby step or start screwdriver lock function, and export corresponding early warning signal, releasing screwdriver lock-out state then needs user to input password on the display screen 4.
Therefore, the present invention have automatically control, the several functions such as data management and monitoring mistake proofing, and efficiently, conveniently, safely, be a kind of energy high-quality numerical control electric screwdrivers of meeting difference processing needs.
Claims (1)
1. the control method of a current feedback type numerical control electric screw driver, operation is driven for driving batch nozzle to complete screw by controller, it is characterized in that: need to set moment of torsion and the desired value of corner according to processing, higher limit and lower limit, after startup, corner and moment of torsion are detected by controller respectively, and carrying out following steps according to moment of torsion: screw is engaged step, Non-follow control or be provided by the controller of startup time and make to press alignment screw cap under batch nozzle, after startup, controller detects moment of torsion by motor current signal, position sensor detection motor position of rotation also provides corner current signal to controller, feed current to motor by controller reach and keep lower-speed state, until controller detects predetermined corner one；Quick fastening step, controller carries out electric current feeding and makes motor be turned at a high speed by low speed, until controller detects predetermined corner two, motor is made to keep high-speed rotation again, until controller detects predetermined corner three, then controller carry out electric current feeding and make motor by high speed steering low speed, until controller detects predetermined corner four；Screw locking step, controller carries out electric current feeding and makes motor keep lower-speed state, until controller detects target torque and target rotation angle, now will send and tighten signal；Standby step, Non-follow control or make batch nozzle depart from screw cap by controller, controller will still keep electric current feeding or stop electric current feeding；The numerical value of described predetermined corner one, two, three, four is all proportional with the numerical value of target rotation angle；Described controller has fault detection capability, for detecting sliding tooth or two kinds of malfunctions of floating lock, when sliding dental phenomenon refers to arrive target rotation angle, controller is still not detected by target torque thus without tightening signal, floating lock status refers to when signal is tightened in arrival target torque generation, controller is still not detected by target rotation angle, and controller selects after detecting fault to enter standby step, keep standby step or start screwdriver lock function, and exports corresponding early warning signal.
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| CN201310389500.4A CN103433882B (en) | 2013-09-02 | 2013-09-02 | A kind of control method of current feedback type numerical control electric screw driver |
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| CN201310389500.4A CN103433882B (en) | 2013-09-02 | 2013-09-02 | A kind of control method of current feedback type numerical control electric screw driver |
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| CN103433882B true CN103433882B (en) | 2016-08-10 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753468A (en) * | 2014-02-13 | 2014-04-30 | 江苏博众汽车部件有限公司 | Screwdriver capable of adjusting pretightening force automatically |
| CN103934673B (en) * | 2014-03-24 | 2016-08-17 | 东莞市聚川装配自动化技术有限公司 | Numerical control electric screwdriver based on static torque sensor and control method |
| CN105269508A (en) * | 2015-11-25 | 2016-01-27 | 柴可 | Method for implementing automatic moment screwdriver |
| CN107020502A (en) * | 2017-05-15 | 2017-08-08 | 杭州巴固机械制造有限公司 | A kind of gas cylinder valve automatic loading and unloading method and device |
| CN110576435B (en) * | 2018-06-08 | 2022-12-02 | 富联智能工坊(郑州)有限公司 | Locking control system, locking control method and storage device |
| CN109659655B (en) * | 2018-12-29 | 2021-07-20 | 华为机器有限公司 | Tuning tool bit device, cavity filter tuning equipment and method |
| CN111360741B (en) * | 2020-04-14 | 2023-12-22 | 广东曦雨科技有限公司 | Multifunctional precise numerical control electric screw driver and application method thereof |
| CN114131553B (en) * | 2021-11-30 | 2023-02-14 | 无锡东海智控软件有限公司 | Motor control device of handheld electric screwdriver |
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Patent Citations (7)
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| US3845373A (en) * | 1972-05-22 | 1974-10-29 | K Totsu | Motor-driven screw driver with automatic stopping means |
| US5617924A (en) * | 1993-08-18 | 1997-04-08 | Robert Bosch Gmbh | Arrangement for tightening screw connections |
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