High-precision repeated positioning device for brake disc cooling hole machining

Abstract

A kind of high-precision repeat positioning device for brake disc heat dissipation hole processing, including chuck body, support disc being located above chuck body and being connected with it, middle hole positioning shaft being coaxially located on the center of support disc, bottom of middle hole positioning shaft is provided with base connected with support disc, middle hole positioning cone sleeve is sleeved on middle hole positioning shaft, middle hole positioning cone sleeve is located above high-performance brake disc, and high-performance brake disc is pressed and fixed;It also includes a plurality of T-shaped blocks connected on the circumference of chuck body, the T-shaped block is slidably connected in the chuck body, the T-shaped block is provided with a jaw with an opening at the top, and one of the jaws is movably connected with the positioning plate by a positioning pin;One end of the middle hole positioning shaft is provided with a circular base, and three through holes are formed in the circular base.The high-precision repeat positioning device for brake disc heat dissipation hole processing avoids the problem of error caused by repeated clamping of the brake disc during machining of the reverse chamfer, and ensures the machining precision.

Description

Technical Field

[0001] This utility model belongs to the field of repeatable positioning technology, specifically relating to a high-precision repeatable positioning device for processing heat dissipation holes in brake discs. Background Technology

[0002] Currently, in the process of machining high-performance brake discs, it is necessary to chamfer both sides of the brake disc. After machining the front side, when chamfering the back side of the brake disc, operators often need to manually flip and repeatedly clamp the brake disc. During the process of flipping and repeatedly clamping the brake disc, clamping errors due to manual operation will affect the chamfering accuracy.

[0003] Therefore, this solution proposes a brake disc precision repeatable positioning device, which solves the problem of low chamfering accuracy during the reverse machining of the brake disc. Utility Model Content

[0004] The purpose of this utility model is to provide a brake disc precision repeat positioning device to solve the problem of low positioning accuracy on both sides of the brake disc. After the brake disc is flipped, the problem of repeated clamping accuracy loss is avoided, and the machining accuracy of the chamfer at the back hole end can be guaranteed.

[0005] A high-precision repeatable positioning device for processing heat dissipation holes in a brake disc includes a chuck body, a support plate located above the chuck body and connected thereto, and a center hole positioning shaft coaxially located at the center of the support plate. The bottom of the center hole positioning shaft is provided with a base connected to the support plate, and a center hole positioning cone sleeve is fitted on the center hole positioning shaft. The center hole positioning cone sleeve is located above the high-performance brake disc and presses and fixes the high-performance brake disc.

[0006] It also includes multiple T-shaped blocks connected to the circumference of the chuck body. The T-shaped blocks are slidably connected inside the chuck body. Each T-shaped block has a claw with an opening fixed at the top. One of the claws is movably connected to a positioning plate via a positioning pin.

[0007] One end of the central positioning shaft is provided with a circular base, and three through holes are provided on the outer circumference of the circular base;

[0008] The three through holes are respectively provided to correspond to the three through holes 2 on the inner circumference of the support plate, and the two are connected by hexagon socket screws.

[0009] The central hole positioning cone sleeve is a tapered sleeve and is slidably mounted on the central hole positioning shaft;

[0010] The outer side of the central hole positioning cone sleeve is engaged with the central hole position of the high-performance brake disc.

[0011] The support plate has a through hole three on its outer circumference, which corresponds to the through hole four on the inner circumference of the chuck body, and the two are fixed together by an internal hex screw six.

[0012] The positioning plate has a U-shaped structure;

[0013] The U-shaped opening of the positioning plate faces the chuck, and the three internal hex screws pass through the bottom of the U-shaped positioning plate and fix it to the opening at the top of the chuck.

[0014] The positioning plate is designed with strip slots;

[0015] The positioning pin passes through the heat dissipation hole on the high-performance brake disc and engages with the small gap of the slotted strip on the positioning plate. Both can be replaced with different diameters to accommodate heat dissipation holes of different sizes.

[0016] The bottom of the claw is fixedly designed with a positioning boss, and the positioning boss and the positioning groove are connected by a hexagonal screw four and a hexagonal screw one;

[0017] The bottom of the T-block has an inverted T-shaped structure, and the inverted T-shaped part is embedded in the inverted T-shaped groove of the chuck body, so that the T-block can slide in the inverted T-shaped groove;

[0018] There are three T-blocks and three chucks. For the sake of simplicity, this solution only mentions the T-blocks and chucks.

[0019] The positioning groove is located on the top of the T-block.

[0020] The positive effects of this utility model are as follows:

[0021] (1) The brake disc precision repeat positioning device provided in this solution achieves center positioning through the center positioning cone sleeve, thus avoiding the problem of precision loss after repeated clamping after the brake disc is flipped.

[0022] (2) After the center positioning cone sleeve realizes the positioning of the center hole, the positioning pin can realize high-precision circumferential positioning, which can ensure the consistency of the chamfer of the back hole end and realize efficient positioning.

[0023] (3) The chamfering of the rear hole end of the brake disc does not need to be deliberately adjusted. It is only necessary to ensure that the heat dissipation positioning hole is consistent with the first hole of the front drilling, which improves the clamping efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the high-precision repeatable positioning device for machining the heat dissipation holes of the brake disc according to this utility model.

[0025] Figure 2 The front view of the high-precision repeatable positioning device for machining the heat dissipation holes of the brake disc of this utility model after removing the chuck jaws and the main body of the chuck.

[0026] Figure 3 The left view of the high-precision repeatable positioning device for machining the heat dissipation holes of the brake disc of this utility model after removing the chuck jaws and the main body of the chuck.

[0027] Figure 4 This is a schematic diagram of the chuck.

[0028] Figure 5 This is a schematic diagram of a T-shaped block.

[0029] Figure 6 This is a schematic diagram of the support plate.

[0030] Figure 7 This is a schematic diagram of the center hole positioning shaft.

[0031] Figure 8 This is a schematic diagram of the center hole positioning cone sleeve.

[0032] Figure 9 This is a schematic diagram of the positioning plate.

[0033] The attached diagram is labeled as follows: 1. Chuck body; 2. Chuck claw; 3. Positioning plate; 4. Positioning pin; 5. Center hole positioning shaft; 6. Center hole positioning cone sleeve; 7. High-performance brake disc; 8. Socket head cap screw one; 9. T-block; 10. Socket head cap screw two; 11. Support plate; 12. Socket head cap screw three; 13. Socket head cap screw four; 14. Socket head cap screw five; 15. Socket head cap screw six; 16. Positioning groove; 17. Positioning boss; 18. Through hole one; 19. Through hole two. Detailed Implementation

[0034] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] See Figures 1-9 A high-precision repeatable positioning device for processing heat dissipation holes of a brake disc includes a chuck body 1, a support plate 11 located above the chuck body 1 and connected thereto, and a center hole positioning shaft 5 coaxially located at the center of the support plate 11. The bottom of the center hole positioning shaft 5 is provided with a base connected to the support plate 11. A center hole positioning cone sleeve 6 is fitted on the center hole positioning shaft 5. The center hole positioning cone sleeve 6 is located above the high-performance brake disc 7 and presses and fixes the high-performance brake disc 7.

[0036] It also includes multiple T-shaped blocks 9 connected to the circumference of the chuck body 1. The T-shaped blocks 9 are slidably connected inside the chuck body 1. The top of the T-shaped blocks 9 is equipped with a claw with an opening fixed at the top. One of the claws is movably connected to the positioning plate 3 through a positioning pin 4.

[0037] One end of the central positioning shaft 5 is provided with a circular base, and three through holes 18 are provided on the outer circumference of the circular base;

[0038] The three through holes 18 are respectively set to correspond to the three through holes 19 on the inner circumference of the support plate 11, and the two are connected by the internal hexagon screws 14.

[0039] The center hole positioning cone sleeve 6 is a tapered sleeve and is slidably mounted on the center hole positioning shaft 5;

[0040] The outer side of the center hole positioning cone sleeve 6 is engaged in the center hole position of the high-performance brake disc 7.

[0041] The support plate 11 is fixed to the chuck body 1 by an internal hex screw 615.

[0042] Positioning plate 3 has a U-shaped structure;

[0043] The U-shaped opening of the positioning plate 3 faces the chuck, and the hex socket screw 312 passes through the bottom of the U-shaped positioning plate 3 and fixes it to the opening at the top of the chuck.

[0044] The positioning plate 3 is designed with a strip groove;

[0045] The positioning pin 4 passes through the heat dissipation hole on the high-performance brake disc 7 and is fitted with the small gap of the strip slot of the positioning plate 3. Both can be replaced with different diameters to accommodate heat dissipation holes of different sizes.

[0046] The bottom of the chuck is fixed with a positioning boss 17, which is connected to the positioning groove 16 by an internal hex screw 13.

[0047] The bottom of the T-block 9 has an inverted T-shaped structure, and the inverted T-shaped part is embedded into the inverted T-shaped groove of the chuck body 1, so that the T-block can slide in the inverted T-shaped groove;

[0048] There are three T-blocks and three chucks. For the sake of simplicity, this solution only mentions the T-blocks and chucks.

[0049] Positioning groove 16 is located on the top of T-block 9.

[0050] The specific working process of this utility model:

[0051] Before machining the brake disc, first, use a hexagonal screw 12 to pass through the bottom of the U-shaped positioning plate 3 and fix it to the opening at the top of the chuck 2. Connect the positioning boss 17 at the bottom of the chuck 2 to the positioning groove 16 at the top of the T-block using hexagonal screws 13 and 8. Insert the inverted T-shaped part at the bottom of the T-block 9 connected to the chuck 2 into the inverted T-shaped groove of the chuck body 1 so that it can slide in the inverted T-shaped groove. Then, align the three through holes 18 on the outer circumference of the circular base of the center hole positioning shaft 5 with the three through holes 19 on the inner circumference of the support plate 11 and connect and fix them with hexagonal screws 14. Install and fix the support plate 11 connected to the center hole positioning shaft 5 onto the chuck body 1 using hexagonal screws 15 and 10. The machining device is now installed.

[0052] When machining the brake disc, the high-performance brake disc 7 is placed on the chuck body 1, and the sliding T-block 9 is used to adjust the jaw 2 to the maximum size. On a high-precision repeatable positioning device for machining brake disc heat dissipation holes, the central hole on the high-performance brake disc 7 is inserted into the central hole positioning shaft 5, and the jaw 2 is adjusted to fix the high-performance brake disc 7. Then, drilling is performed according to the set program.

[0053] After drilling the front side, flip the high-performance brake disc 7 and place it on the three jaw clamps. Slide the central control positioning cone sleeve 6 located on the central hole positioning shaft 5 so that the outer side of the central hole positioning cone sleeve 6 is clamped in the central hole position of the high-performance brake disc 7, thereby fixing the high-performance brake disc 7. Then, insert the positioning pin 4 into the heat dissipation hole of the high-performance brake disc and finally insert it into the positioning groove on the positioning plate 2 to achieve high-precision repeatable positioning of the high-performance disc flipping. After locking the three jaws, pull out the positioning pin 4 and mirror the original machining program to achieve high-precision machining of the chamfer at the back end of the heat dissipation hole.

[0054] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A high-precision repeatable positioning device for machining heat dissipation holes in a brake disc, comprising a chuck body (1), a support disc (11) located above and connected to the chuck body (1), and a center hole positioning shaft (5) coaxially located at the center of the support disc (11), characterized in that, The bottom of the central hole positioning shaft (5) is provided with a base connected to the support plate (11). A central hole positioning cone sleeve (6) is fitted on the central hole positioning shaft (5). The central hole positioning cone sleeve (6) is located above the high-performance brake disc (7) and presses and fixes the high-performance brake disc (7). It also includes multiple T-shaped blocks (9) connected to the circumference of the chuck body (1). The T-shaped blocks (9) are slidably connected inside the chuck body (1). The top of the T-shaped blocks (9) is equipped with a claw with an opening fixed on the top. One of the claws is movably connected to the positioning plate (3) through a positioning pin (4).

2. The high-precision repeatable positioning device for machining heat dissipation holes in a brake disc according to claim 1, characterized in that, One end of the central hole positioning shaft (5) is provided with a circular base, and the circular base is provided with three through holes (18). The three through holes are respectively set to correspond to the three through holes (19) on the inner circumference of the support plate (11), and the two are connected by internal hexagonal screws (14).

3. The high-precision repeatable positioning device for machining heat dissipation holes in a brake disc according to claim 1, characterized in that, The central hole positioning cone sleeve (6) is a cone-shaped sleeve and is slidably mounted on the central hole positioning shaft (5); The outer side of the central hole positioning cone sleeve (6) is engaged in the central hole position of the high-performance brake disc (7).

4. The high-precision repeatable positioning device for machining heat dissipation holes in a brake disc according to claim 1, characterized in that, The positioning plate (3) has a U-shaped structure; The positioning plate (3) has a U-shaped opening facing the claw and is fixed to the opening at the top of the claw by an internal hex screw (12).

5. The high-precision repeatable positioning device for machining heat dissipation holes in a brake disc according to claim 1, characterized in that, The positioning plate (3) is designed with a slot; The positioning pin (4) passes through the heat dissipation hole on the high-performance brake disc (7) and is fitted with the slotted small clearance of the positioning plate (3), and the two can be replaced with different diameters.

6. The high-precision repeatable positioning device for machining heat dissipation holes in a brake disc according to claim 1, characterized in that, The bottom of the claw is fixedly designed with a positioning boss (17), and the positioning boss (17) and the positioning groove (16) are connected by an internal hex screw (13). The bottom of the T-shaped block (9) is an inverted T-shaped structure, and it is embedded in the inverted T-shaped groove of the chuck body (1) through the inverted T-shaped part; The positioning groove (16) is located on the top of the T-block (9).

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