EP1062073A1 - A machine for grinding semi-finished products, particularly billets - Google Patents
A machine for grinding semi-finished products, particularly billetsInfo
- Publication number
- EP1062073A1 EP1062073A1 EP99911742A EP99911742A EP1062073A1 EP 1062073 A1 EP1062073 A1 EP 1062073A1 EP 99911742 A EP99911742 A EP 99911742A EP 99911742 A EP99911742 A EP 99911742A EP 1062073 A1 EP1062073 A1 EP 1062073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- axis
- frame
- billet
- grinding wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
Definitions
- the present invention relates to a machine for grinding
- Billets produced by rolling generally have surface irregularities mainly due to cracks, scum and other processing residues resulting from the melting and cooling processes.
- the grinding wheel is rotated about its own axis and is brought into contact with the billet with a sliding movement relative thereto in order to remove a predetermined thickness of material and consequently to improve the surface quality of the billet.
- billets of larger cross-section such as
- surface grinding takes place by aligning the grinding wheel along the axis of movement of the billet and by performing several forward .runs of the billet, the grinding wheel being moved transverse the axis of movement for each run so as to grind the
- the billet has a typical surface shape with depressions extending longitudinally, the action of the grinding wheel involves the elimination of these depressions by the undesired removal of a greater quantity of material than
- the problem upon which the present invention is based is that of providing a machine for grinding semi-finished products, particularly billets, which is designed structurally
- Figure 1 is a partial side elevational view of a grinding machine according to the invention
- Figure 2 is a section taken on the line II-II of Figure 1
- Figure 3 is a front elevational view of the machine of the
- Figure 4 is a side elevational view showing a detail of the machine of the previous drawings, on an enlarged scale
- Figures 5 and 6 are an axial section and a side elevational view, respectively, of a grinding wheel with which the grinding
- Figure 7 is a plan view of the grinding wheel of Figures 5 and
- Figure 8 is a schematic view showing, in plan, pairs of
- Figure 9 is a schematic front elevational view of the grinding
- the machine 1 comprises a substantially parallelepipedal
- Each frame 4 is formed by pairs of rigidly-interconnected longitudinal and transverse elements indicated 4a, 4b.
- the billet 2 being ground is guided beneath the framework 3 along an axis of
- the machine 1 further comprises a first frame and a second frame, indicated 6 and 7, respectively, which are mounted on the framework 3 and are movable relative thereto as
- the first frame 6 is mounted inside the framework 3 and is also of parallelepipedal shape.
- the frame 6 is formed by pairs of first longitudinal elements 6a connected by first transverse elements 6b and rigidly interconnected by means of
- each longitudinal element 4a of the framework 3 At one end of each longitudinal element 4a of the framework 3, at the same end of the framework, a respective arm 8 is articulated about a corresponding pin 8a projecting inside the framework. Each arm 8 is in turn articulated at its
- the arms 8 thus constitute a parallelogram device for moving the first frame 6 relative to the framework 3.
- articulation to the first frame 6 describe paths along arcs of circles centered on the axes of the pins 8a, so as to cause the first frame 6 to move in a direction which, for limited angles of pivoting about the pins 8a, is approximately straight and
- a pair of actuators such as, for example, two hydraulic jacks 10 shown schematically in Figure 1, is provided for moving the first frame 6.
- Each jack 10 is mounted on a support element 11 extending from the respective upper longitudinal element 4a of the framework 3 and has a rod 12 acting on the
- first frame 6 in the region of the points of articulation to the arms 8 .
- the second frame 7 is mounted inside the first frame 6 and has a similar parallelepipedal shape.
- the frame 7 is formed by a pair of opposed end structures rigidly
- Each end structure is formed by pairs of rigidly interconnected second longitudinal elements 7a and second transverse elements 7b.
- the cross-members 13 serve to support two pairs of supports 14 with bearings 15 between which two respective shafts 16, 17 are supported for rotation.
- a respective circular grinding wheel 18, 19 is keyed to each shaft 16, 17.
- Each shaft 16, 17 is also arranged, at one of its ends, for
- the belt transmissions are driven by respective electric
- the grinding wheels 18, 19 are positioned, relative to the second frame 7, with parallel axes of rotation Ml and M2 which are inclined angularly to an axis transverse the axis B of movement of the billet 2.
- the transverse axis is parallel
- the angle C may have
- values of between 5° and 45° and the value selected is preferably 30°.
- the second frame 7 is also mounted for pivoting on the first frame 6 about an axis Kl parallel to the axis K.
- second frame 7 has supports 21 which are fixed in central
- Each grinding wheel 18, 19 comprises a central hub 22
- the ring is of the type with an interrupted edge and is thus composed of a plurality of structurally independent grinding-
- the grinding wheel sectors 23 More particularly, the grinding wheel
- the edge 24 comprises six identical sectors 23 each of which is defined peripherally by edge profiles 24.
- the profiles are inclined angularly to the axis of rotation Ml, M2 of the grinding wheel, as can be seen in Figure 7.
- the angle of inclination, indicated T, selected for the edge 24 is preferably between 10°
- Each abrasive sector 23 is restrained on the hub 22 by means of a pair of jaws 25 clamped by screws 26 extending through the hub. It will be noted that each grinding-wheel
- the grinding wheels 18, 19 are moved, by means of the parallelogram device operated by the jacks 10, into contact with the surface 2a of the billet 2 being ground.
- the billet 2 is guided beneath the framework 3 along the axis B with a sliding movement relative to the grinding wheels 18, 19 which in turn are rotated about their own axes Ml and M2 by means of the
- Figure 4 shows, in continuous outline, one of the grinding wheels 18, 19 placed in contact with a large billet 2 (for example having a cross-section of
- Figure 9 shows schematically and on an enlarged scale, the surface 2a of the billet processed by the pair of grinding wheels 18, 19.
- the imaginary line of the profile of the surface 2a obtained as a
- edge profiles advantageously improves grinding penetration as well as achieving more uniform power absorption, at the same
- the abrasive material of the billet wears more evenly, optimizing the useful life of the grinding-wheel sectors.
- the invention thus solves the problem set, achieving the
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD980052 | 1998-03-13 | ||
ITPD980052 ITPD980052A1 (en) | 1998-03-13 | 1998-03-13 | MACHINE FOR THE GRINDING OF SEMI-FINISHED PRODUCTS, IN PARTICULAR OF BILLETS |
PCT/EP1999/001437 WO1999047305A1 (en) | 1998-03-13 | 1999-03-05 | A machine for grinding semi-finished products, particularly billets |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1062073A1 true EP1062073A1 (en) | 2000-12-27 |
EP1062073B1 EP1062073B1 (en) | 2002-01-16 |
Family
ID=11392097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99911742A Expired - Lifetime EP1062073B1 (en) | 1998-03-13 | 1999-03-05 | A machine for grinding semi-finished products, particularly billets |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1062073B1 (en) |
AU (1) | AU3031799A (en) |
DE (1) | DE69900674D1 (en) |
IT (1) | ITPD980052A1 (en) |
WO (1) | WO1999047305A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3049056B1 (en) | 1998-07-02 | 2000-06-05 | 日本電気通信システム株式会社 | Subscriber data control method for mobile communication network |
JP2008119819A (en) * | 2006-10-20 | 2008-05-29 | Jtekt Corp | Method for manufacturing grinding wheel having depression |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1582608A (en) * | 1924-04-28 | 1926-04-27 | Bridgeport Safety Emery Wheel | Sectional grinding wheel |
DE3524561A1 (en) * | 1985-07-10 | 1987-02-05 | Egon Evertz | Grinding device |
SE9500116L (en) * | 1995-01-16 | 1996-07-17 | Danieli Centro Maskin Spa | Method of grinding preferably substances and apparatus for practicing the method |
JPH09193024A (en) * | 1996-01-16 | 1997-07-29 | Musashi Seimitsu Ind Co Ltd | Grinding wheel |
-
1998
- 1998-03-13 IT ITPD980052 patent/ITPD980052A1/en unknown
-
1999
- 1999-03-05 EP EP99911742A patent/EP1062073B1/en not_active Expired - Lifetime
- 1999-03-05 AU AU30317/99A patent/AU3031799A/en not_active Abandoned
- 1999-03-05 DE DE69900674T patent/DE69900674D1/en not_active Expired - Lifetime
- 1999-03-05 WO PCT/EP1999/001437 patent/WO1999047305A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9947305A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69900674D1 (en) | 2002-02-21 |
EP1062073B1 (en) | 2002-01-16 |
ITPD980052A1 (en) | 1999-09-13 |
WO1999047305A1 (en) | 1999-09-23 |
AU3031799A (en) | 1999-10-11 |
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