WO2007099653A1

WO2007099653A1 - Vertical-type double-head surface grinding machine for machining brake disk

Info

Publication number: WO2007099653A1
Application number: PCT/JP2006/310363
Authority: WO
Inventors: Hidetoshi Tasaki
Original assignee: Daisho Seiki Corporation
Priority date: 2006-02-28
Filing date: 2006-05-24
Publication date: 2007-09-07
Also published as: JP2007229830A

Abstract

A vertical-type double-head surface grinding machine for machining a brake disk, the surface grinding machine being capable of grinding both surfaces of various disk-like workpieces without changing work holders. The surface grinding machine has a pair of upper and lower grinding wheels (2, 3) rotating about a vertical axis and the rotatable work holders (9) for holding, as a workpiece (W), the brake disk having a center hole (18). The workiece (W) held at the work holders (9) is inserted between both grinding wheels (2, 3) while being rotated about the center of the workpiece, and thus both the upper and lower surfaces of the workpiece (W) are ground at the same time. Each of the work holders (9) has three or more slide members (40) disposed on a rotatable holder body (10) at equal intervals in the circumferential direction and movable in the radial direction. The slide members (40) are fitted to chuck claws (41) capable of abutting against the peripheral edge of the center hole (18) of the workpiece (W) from the rotating axis side of the holder body (10), and the slide members (41) are radially simultaneously movable by an equal amount in conjunction with operation of a single drive device.

Description

Specification

Vertical double-sided surface grinding machine for machining brake discs

Technical field

TECHNICAL FIELD [0001] The present invention relates to a vertical double-sided grinder for machining brake discs, in which both upper and lower end surfaces of a brake disc or a similar disk-shaped workpiece are ground simultaneously by a pair of upper and lower rotary grinding wheels.

Background art

FIG. 7 is a conventional vertical double-sided surface grinding machine for brake disc cage (Patent Document 1), which has a pair of upper and lower grinding wheels 102, 103 in a main body case 101, in front of the main body case 101. The workpiece supply device E includes a rotary table 105, a pair of workpiece holders 107 provided on the rotary table 105, and a clamp device 108 for fixing the workpiece W placed on the workpiece holder 107 from above. Arrange.

FIG. 8 is an enlarged vertical cross-sectional view of an arrow VII portion in FIG. 7. The work holder 107 includes a holder main body 110 fixed to the upper end of a vertical rotating shaft 111, and the holder main body 110. A disc-shaped positioning plate 115 fixed to the upper surface, a columnar member 116 for centering, and the like are provided. The holder body 110 is rotated around the rotation axis 02 by the drive shaft 111, and the disc-shaped positioning member 115 has a reference plane K1 at the upper end, and is positioned on the reference plane K1. By placing the workpiece W, the machining surface 130 of the workpiece W is positioned so as to be parallel to the grinding surfaces of the wheel 2 and 3. The cylindrical member 116 is configured so that the center of the workpiece W is aligned with the rotation axis 02 by fitting the central hole 121 of the workpiece W into the outer peripheral surface of the cylindrical member 116.

[0004] The clamp device 108 has a pressing member 120 that can be moved up and down by a cylinder mechanism at the lower end.

[0005] When holding the workpiece W, the center hole 121 of the workpiece W is fitted to the outer peripheral surface of the cylindrical member 116, and the lower end surface of the workpiece W is placed on the reference plane K1. The pressing member 120 of 8 is lowered and the upward force also presses the workpiece W against the reference plane K1, so that the work surface 130 of the workpiece W is parallel to the grinding wheels 2 and 3 and the horizontal position. Come to decide the position! /

Patent Document 1: Japanese Patent Laid-Open No. 2002-307270

Disclosure of the invention

Problems to be solved by the invention

In the vertical double-sided surface grinder shown in FIGS. 7 and 8, since it is necessary to provide a clamp device 108 for fixing the workpiece W to the workpiece holder 107, the number of components increases and the component cost increases. And the work process during assembly increases.

[0007] When grinding another type of workpiece W having a different diameter of the center hole 121, the workpiece is replaced with a cylindrical member 116 having a diameter suitable for the center hole 121 of the new workpiece W, and the pressing member of the clamp device 108 is used. The 120 must also be replaced with a size suitable for the new workpiece. In this respect as well, the number of parts increases, and the setup change work takes time.

[0008] (Object of the invention)

The object of the present invention is to make it possible to easily fix a disc-shaped workpiece having a central hole in a predetermined position and state without a special clamping device, and to determine the type of workpiece, particularly the central hole. It is to provide a vertical double-sided surface grinding machine for machining brake discs that can be double-sided and flattened without changing the workpiece holder. Means for solving the problem

[0009] In order to solve the above-mentioned problem, the invention according to claim 1 includes a pair of upper and lower artillery wheels that rotate around a vertical axis, and a work holder that holds a brake disc having a central hole as a work. In a solid double-sided surface grinder for brake disc force force that simultaneously grinds both the upper and lower end surfaces of a workpiece by rotating the workpiece held by the workpiece holder between both wheels while rotating, the workpiece holder Is provided with three or more slide members that are arranged at equal intervals in the circumferential direction and movable in the radial direction on the holder body that can rotate, and each slide member rotates on the periphery of the center hole of the workpiece. It has a chuck claw that can come into contact with the shaft core side, and can be moved in the radial direction by an equal amount simultaneously in conjunction with the drive unit. The work surface of the workpiece is placed on the holder body or slide member. Whetstone A reference surface is formed to keep it parallel to the car's grinding surface.

[0010] The invention described in claim 2 is a solid double-sided plane research for processing a brake disc according to claim 1. In the cutting machine, the drive device includes a cam drive body coupled to each slide member via a cam mechanism, and a drive unit that moves the cam drive body along a rotation axis, and the drive unit includes the drive unit. By moving the cam drive body in the direction of the axis of rotation, all the slide members are simultaneously moved in the radial direction by an equal amount via the cam mechanism.

The invention's effect

[0011] According to the configuration of claim 1, the workpiece (brake disc) is placed on the reference surface, so that the machining surface is set parallel to the grinding surface of the grinding wheel, and each check claw is arranged in the radial direction. Is moved to the outside and pressed against the periphery of the center hole, thereby positioning in the horizontal direction with respect to the axis of rotation. In other words, since the parallelism of the work surface of the work with respect to the grinding surface and the horizontal positioning with respect to the rotation axis can be performed with only the work holder, there is no need for a clamping device for pressing the work upward as in the prior art. As a result, the number of parts can be reduced and the cost can be reduced.

[0012] Even when holding a workpiece having a different diameter of the central hole, it is possible to position and fix the workpiece with the same chuck pawl. Therefore, as shown in FIG. It is not necessary to replace the centering cylindrical member 116 as shown in FIG. 7 or the pressing member 120 of the clamping device 108 as shown in FIG.

[0013] According to the configuration of claim 2, the driving device for driving the slide member having the chuck pawl can be gathered at the center of the work holder, and the work holder can be kept compact. it can.

Brief Description of Drawings

FIG. 1 is a side view showing an embodiment of a saddle type double-head surface grinding machine according to the present invention.

FIG. 2 is an enlarged longitudinal sectional view of a workpiece supply device of the solid double-sided surface grinder shown in FIG.

FIG. 3 is an enlarged plan view of the work holder shown in FIG. 1 shown with a work placed thereon.

4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a view on arrow V in FIG.

6 is a cross-sectional view taken along the line VI-VI in FIG.

FIG. 7 is a side view of a conventional example.

FIG. 8 is an enlarged vertical cross-sectional view of the work holder shown in FIG. Explanation of symbols

[0015] 2, 3 Artillery wheel

10 Holder body

33 Cam drive

40 Slide member

41 Chuck claw

43 Cam mechanism

46 Cam groove

47 Cam projection

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a side view showing an embodiment of a saddle-type double-sided surface grinder for machining a brake disc to which the present invention is applied, and a pair of artillery wheels 2, 3 facing vertically in a main body case 1. The upper and lower artillery wheels 2 and 3 are fixed to the upper and lower grinding wheel shafts 4 and 5 arranged on the same vertical shaft core 03, respectively. Both turret shafts 4 and 5 are configured to be vertically movable by an elevating mechanism, and are linked to a power transmission mechanism so as to rotate in opposite directions.

[0017] The workpiece supply device E is disposed in front of the main body case 1, and includes a support case 8 installed on the base stand 12, a rotary table 6 arranged on the support case 8, and the rotary table. And a pair of workpiece holders 9 arranged on the bull 6.

[0018] In the support case 8, a table drive shaft 7 is supported via a bearing so as to be rotatable about the table rotation axis Ol, and the rotary table 6 is fixed to the upper end of the table drive shaft 7. The table drive shaft 7 is linked to the drive motor via a transmission mechanism (not shown).

[0019] The pair of workpiece holders 9 are arranged with a phase difference of 180 ° around the table axis Ol, and each of the workpiece holders 9 can be driven to rotate around the rotation axis 02 on the cylindrical holder support case 15. When the main body 10 is supported and the rotary table 6 is rotated halfway, the position can be changed between the grinding position A2 on the grinding wheel side and the attachment / detachment position A1 on the opposite side.

FIG. 2 is an enlarged vertical sectional view of the workpiece supply device E. The upper end surface of the holder body 10 is (Brake disc) W is formed as a reference plane K1 for maintaining the processed surface 50 of the W parallel to the grinding surfaces of the grinding wheels 2 and 3, and the lower surface of the holder body 10 is used for rotation. The rotating shaft 21 is connected to the body. The rotary shaft 21 is rotatably supported inside the holder support case 15 via a bearing 22, and a drive motor (not shown) via a transmission gear 25, an idle gear 26, a drive gear 27, and a drive shaft 28. It is linked to.

[0021] A hydraulic rotary cylinder 30 is disposed at the lower end of the rotary shaft 21, and the hydraulic rotary cylinder 30 is fixed to the upper end flange portion 7a of the table drive shaft 7 and has an output rod 30a protruding upward. The output rod 30a is configured to be rotatable about the rotation axis 02 and is moved in the vertical direction by hydraulic control in the hydraulic rotary cylinder 30.

[0022] The output rod 30a is connected to a lower end portion of a vertical connecting rod 32. The connecting port 32 is disposed coaxially with the rotation shaft core 02 and extends upward in the rotation shaft 21. The upper end portion is interlocked with the cam drive body 33 disposed in the holder body 10. That is, as the output rod 30a moves in the vertical direction, the cam drive body 33 moves in the vertical direction via the connecting rod 32.

FIG. 3 is an enlarged plan view of the work holder 9, showing the work W placed thereon. Within the holder body 10, three slide members are equally spaced in the circumferential direction. 40 is disposed on the inner peripheral end of the upper end surface of each slide member 40, and a chuck claw 41 projecting upward is formed in the body, and the radial outer peripheral end of each chuck claw 41 is the same. It is aligned on the circumference. Each slide member 40 is fitted and supported in each radial groove 44 formed in the holder body 10 so as to be movable in the radial direction, and an inner peripheral end surface thereof is connected to the cam drive body 33 via the cam mechanism 43. Linked together.

FIG. 5 is a view as seen from the direction of the arrow V in FIG. 3. The groove 44 formed in the holder body 10 has a mortise portion 44a on both sides in the circumferential direction, and the mortise portion 44a has a mortise portion 44a. The tenon portions 40b formed on both sides in the circumferential direction of the slide member 40 engage with each other, so that the slide member does not move in the vertical direction (in the direction of the axis of rotation).

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. And holder body 1 By fitting into the 0 bottom end forging recess, they are aligned on the same axis 02 as the rotary shaft 21. The cam driving body 33 is disposed at the center of the holder body 10 and is connected to the connecting rod 32 by a connecting bolt 38 and a fixed cylinder 39 so as to be integrally movable in the vertical direction. In other words, the connecting bolt 38 is screwed to the upper end of the connecting rod 32, and the cam drive 33 and the fixed cylinder 39 are fitted to the connecting bolt 38 in this order in the order of the upper force. By fixing to the connecting bolt 38 with 43, the force drive body 33 is fixed between the fixed cylinder 39 and the head of the connecting bolt 38! /.

The cam mechanism 43 configured between the outer peripheral surface of the cam drive body 33 and the inner peripheral surface of each slide member 40 allows the cam drive body 33 to move in the vertical direction in the radial direction of each slide member 40. It is a mechanism for converting to horizontal movement. It is formed on the outer peripheral surface of the cam drive 33, and is formed on the inner peripheral surface of the slide member 40. The cam groove 46 can slide in the cam groove length direction. It is composed of a cam projection 47 that fits in. The cam groove 46 and the cam protrusion 47 are inclined upward and inclined toward the rotation axis 02, and as the cam driving body 33 rises, each slide member 40 is moved radially outward by an equal amount. On the contrary, when the cam drive body 33 is lowered, the slide members 40 are moved inward in the radial direction by an equal amount.

FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 4. The cam protrusion 47 is formed in a T shape in cross section, and the cam groove 36 is formed in a T shape corresponding to the cross section shape of the cam protrusion 37. Thus, the slide member 4 can be moved outward and inward in the radial direction regardless of whether the cam drive 33 moves upward or downward.

[0028] [Action]

In FIG. 2, in the holder 9 at the attachment / detachment position A1, the cam drive 33 is lowered to move each slide member 40 inward in the radial direction, and each chuck claw 41 is moved toward the rotation axis 02 side. In this state, the work W is placed on the reference plane K1 of the holder body 10. At this time, each chuck claw 41 is positioned away from the periphery of the central hole 18 of the workpiece W toward the rotation axis 02 side.

Next, by actuating the hydraulic rotary cylinder 30, the cam drive body 33 is raised via the connecting rod 32 as shown in FIG. 4, and each slide member 40 is moved radially outward via the cam mechanism 43. The outer peripheral end surface of the chuck pawl 41 is leveled to the peripheral edge of the center hole 18 of the workpiece W. Pressure contact. That is, the processed surfaces 50 and 50 of the workpiece W are made parallel to the grinding surfaces of the grinding wheels 2 and 3 by the reference plane Kl, and the workpiece center is aligned with the rotation shaft core 02 by the chuck pawl 41. Fix workpiece W.

[0030] After fixing the workpiece W to the workpiece holder 9 as described above, the unground workpiece W is moved from the attachment / detachment position A1 to the grinding position A2 by rotating the rotary table 6 of FIG. 2 halfway, and In a state where the workpiece W is rotated around the rotation axis 02 by the rotation of the holder body 10, the upper and lower processing surfaces 50 on the outer peripheral portion of the workpiece W are ground by a predetermined amount by the upper and lower carts 2 and 3.

[0031] When grinding of the workpiece W is completed, the upper and lower artillery wheels 2 and 3 retreat up and down from the upper and lower end surfaces of the workpiece W, respectively, and the rotation of the holder body 10 stops, and the rotary table 6 rotates half a turn. As a result, the position is changed to the attachment / detachment position A1 in FIG. Then, when the drive cam mechanism 33 is lowered, the slide member 40 is moved inward in the radial direction, and the ground workpiece W is taken out from the workpiece holder 9.

[0032] Even when a workpiece (brake disc) W of another shape is cared for, it is not necessary to replace the holder body 10. For example, when grinding workpieces with different diameters of the central hole 18 of the workpiece W, the height H in the axial direction of the workpiece W, and the outer diameter of the workpiece W, first, the workpiece is adjusted by adjusting the amount of movement of the slide member 40 in the radial direction. It is possible to respond to changes in the center hole 18 of W, and by adjusting the vertical position of the artillery wheels 2 and 3, it is possible to correspond to the change in the height H of the workpiece W in the axial direction. By adjusting the position of the support case 8 in the front-rear direction, changes in the outer diameter of the workpiece W can be accommodated.

[0033] [Other Embodiments]

(1) In the embodiment described above, the force that forms the reference plane K1 that determines the parallelism of the work surface 50 of the workpiece W with respect to the grinding surfaces of the grinding wheels 2 and 3 on the upper end surface of the holder body 10, for example, It is also possible to form it on the upper end surface of the ride member 40.

(2) Four or more slide members 40 having chuck claws 41 may be provided.

(3) As a cam mechanism provided between the cam drive body 33 and the slide member 40, a cam protrusion may be formed on the cam drive body 33 and a cam groove may be formed on the slide member 40.

Claims

The scope of the claims

[1] A pair of upper and lower artillery wheels that rotate around a vertical axis and a work holder that holds a brake disc having a central hole as a work, and both guns are rotated while the work held by the work holder is rotated. In a double-sided surface grinder for brake disc cage that grinds both the upper and lower end surfaces of the workpiece simultaneously by inserting between stones,

The workpiece holder includes three or more slide members that are arranged at equal intervals in the circumferential direction and movable in the radial direction on a rotatable holder body.

Each slide member has a chuck claw that can come into contact with the periphery of the center hole of the workpiece from the side of the axis of rotation, and can move in the radial direction by an equal amount simultaneously with the drive device.

A vertical double-sided surface grinder for brake disc cage, characterized in that a base surface for holding the work surface of the workpiece parallel to the grinding wheel surface of the grinding wheel is formed on the holder body or slide member. .

[2] The drive device includes a cam drive body connected to each slide member via a cam mechanism, and a drive unit that moves the cam drive body along the rotation axis.

By moving the cam drive body in the direction of the axis of rotation by the drive unit, all the slide members are simultaneously moved in the radial direction by the same amount via the cam mechanism. A vertical double-sided surface grinder for machining brake discs according to claim 1.