A machining clamp and machining process for a brake caliper

Abstract

The application provides a brake caliper machining clamp and a machining process. The brake caliper machining clamp comprises a first clamp for a second machining process and a second clamp for a third machining process. The brake caliper can be accurately positioned. The cylinder hole and the cylinder hole end face are sequentially machined in one positioning. In the third process, the cylinder hole end face machined in the second process is used for positioning, and the lug hole, the lug hole end face and the hook end face are machined. The parallelism of the lug hole end face and the hook end face, the perpendicularity of the cylinder hole and the hook end face and the like can meet the machining precision requirements. The parallelism of the lug hole end face and the hook end face can be improved to 0.005, and the perpendicularity of the cylinder hole and the hook end face can be improved to 0.03.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile part processing, in particular to a brake caliper processing clamp and processing technology. BACKGROUND

[0002] The brake caliper is an important component of the brake, and the brake caliper on the automobile is usually irregular in shape. During the processing of the brake caliper, the brake caliper needs to be fixed on the machine tool for processing to ensure the processing precision.

[0003] As Figure 1 The brake caliper shown includes a cylinder hole 10A, an ear hole 10B and its end face 10G, a hook claw end face 10C, a circular arc surface 10D, a cylinder hole end face 10E, an oil inlet hole and an exhaust hole 10F. During the processing and production of the brake caliper, the above-mentioned holes and end faces need to be processed to ensure that the processing precision of each hole and end face meets the assembly requirements of the subsequent brake.

[0004] Under normal circumstances, the processing procedure of the brake caliper is as follows: first step: opening the brake caliper and processing the circular arc surface 10D; second step: processing the ear hole 10B and its end face 10G; third step: processing the cylinder hole 10A; fourth step: processing the oil inlet hole and the exhaust hole 10F. After processing, the parallelism of the hook claw end face 10C and the ear hole end face 10G needs to reach 0.08, and the perpendicularity of the cylinder hole 10A and the hook claw end face 10C needs to reach 0.1, so as to meet the assembly and use requirements of the subsequent brake.

[0005] In the above-mentioned processing procedure, the circular arc surface 10D needs to be processed in place in the first step to meet the processing precision requirements. However, due to the limitations of processing equipment and tools, the processing precision of the first step often cannot meet the requirements. If the processing precision cannot meet the requirements, since the processing surface of the first step is used for positioning in the second step and the third step, the processing precision of the ear hole 10B and its end face 10G, the cylinder hole 10A, the oil inlet hole processed in the second step and the third step, such as the parallelism of the hook claw end face 10C and the ear hole end face 10G, and the perpendicularity of the cylinder hole 10A and the hook claw end face 10C, cannot meet the requirements, thereby affecting the caliper body slip resistance of the brake, increasing the stiction, and even causing the problems of driving drag, abnormal wear of the friction block, or increasing the required liquid volume of the brake, thereby causing long brake pedal travel, large difference between left and right braking forces, brake deviation, and even affecting driving safety. SUMMARY

[0006] In order to solve the above-mentioned technical problems, the present application provides a brake caliper processing clamp and processing technology.

[0007] The first aspect of the application provides a brake caliper machining clamp, comprising a first clamp for a second machining process and a second clamp for a third machining process;

[0008] The first clamp comprises a lathe adapter disc, one side of which is connected with a lathe, and the other side is fixedly connected with a first positioning assembly, the first positioning assembly is fixedly connected with a second positioning assembly, the brake caliper is coarsely positioned through the second positioning assembly, and is finely positioned through the first positioning assembly;

[0009] The second clamp is arranged on a rotary table assembly, the rotary table assembly comprises a first mounting plate, a second mounting plate is arranged on the first mounting plate, a positioning seat is fixedly arranged on the second mounting plate, the positioning seat is used for supporting and pre-positioning the brake caliper; along the length direction of the first mounting plate, one side of the positioning seat is provided with a first supporting unit and a first pressing unit, the other side of the positioning seat is provided with a second supporting unit and a second pressing unit; along the width direction of the first mounting plate, one side of the positioning seat is provided with a third pressing unit.

[0010] In some embodiments of the application, the first positioning assembly comprises a first positioning piece fixedly connected with the lathe adapter disc, the first positioning piece is internally provided with a first connecting piece, the first connecting piece is fixedly arranged on the lathe adapter disc, the first connecting piece is internally provided with a second connecting piece, the second connecting piece is sleeved with a second positioning piece, and the end of the second connecting piece is provided with a third positioning piece.

[0011] In some embodiments of the application, the second positioning piece is provided with a positioning claw, and the positioning claw is used for center positioning the brake caliper.

[0012] In some embodiments of the application, the third positioning piece is provided with a floating pressing head, and the floating pressing head is used for pressing the brake caliper.

[0013] In some embodiments of the application, the second positioning assembly comprises a fourth positioning piece fixedly connected with the first positioning assembly, and the fourth positioning piece is provided with a fifth positioning piece.

[0014] In some embodiments of the application, the fifth positioning piece is provided with a first positioning pin, and the first positioning pin is used for coarsely positioning the brake caliper.

[0015] In some embodiments of the application, the first positioning assembly further comprises a guide piece fixedly connected with the first connecting piece.

[0016] In some embodiments of the present application, the first mounting plate is provided with a first mounting hole, the second mounting plate is provided with a second mounting hole, and a ball-type lock quick-change assembly is arranged in the first mounting hole and the second mounting hole to realize quick mounting and dismounting of the first mounting plate and the second mounting plate.

[0017] In a second aspect of the present application, a machining process of a brake caliper is provided, comprising:

[0018] The hook end face and the circular arc face are machined using a horizontal milling machine;

[0019] The brake caliper is positioned by a first clamp, and the cylinder hole and the cylinder hole end face are machined using a horizontal lathe;

[0020] The brake caliper is positioned by a second clamp, and the lug hole, the lug hole end face, and the hook end face are machined using a vertical machining center;

[0021] The oil inlet hole and the exhaust hole are machined using a vertical machining center.

[0022] In some embodiments of the present application, when the hook end face is machined using the horizontal milling machine, a machining allowance of 0.3mm-0.5mm is reserved.

[0023] Compared with the prior art, the present application has the following advantages and beneficial effects: the brake caliper machining clamp of the present application comprises a first clamp for a second machining process and a second clamp for a third machining process, can accurately position the brake caliper, sequentially machine the cylinder hole and the cylinder hole end face in one positioning, and use the cylinder hole end face machined in the second process for positioning in the third process to machine the lug hole, the lug hole end face, and the hook end face, so as to ensure that the parallelism of the lug hole end face and the hook end face, the perpendicularity of the cylinder hole and the hook end face, and the like meet the machining precision requirements. The parallelism of the lug hole end face and the hook end face can be improved to 0.005, and the perpendicularity of the cylinder hole and the hook end face can be improved to 0.03.

[0024] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present application, and the illustrative embodiments thereof and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 is a structural schematic diagram of a brake caliper provided by an exemplary embodiment of the present application;

[0027] Figure 2 is a structural schematic diagram of a first clamp provided by an exemplary embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a working state of a first clamp provided by an example embodiment of the present application;

[0029] Figure 4 is an exploded view of the first clamp provided by an example embodiment of the present application;

[0030] Figure 5 is a top view of the first clamp provided by an example embodiment of the present application;

[0031] Figure 6 is a sectional view at A-A in FIG. 7; Figure 5

[0032] Figure 7 is a schematic diagram of a structure of a second positioning member provided by an example embodiment of the present application;

[0033] Figure 8 is a schematic diagram of a structure of a third positioning member provided by an example embodiment of the present application;

[0034] Figure 9 is a front view of a second clamp provided by an example embodiment of the present application;

[0035] Figure 10 is a top view of the second clamp provided by an example embodiment of the present application;

[0036] Figure 11 is a left view of the second clamp provided by an example embodiment of the present application;

[0037] Figure 12 is a flowchart of a machining process of the brake caliper provided by an example embodiment of the present application.

[0038] In the drawings:

[0039] 10A, cylinder hole; 10, lathe adapter disc;

[0040] 20, first positioning assembly; 201, first positioning member; 2011, first positioning part; 2012, second positioning part; 202, first connecting member; 203, second connecting member; 204, second positioning member; 2041, positioning claw; 2042, clamping surface; 205, third positioning member; 2051, floating pressing head; 206, guide member; 207, second positioning pin; 208, counterweight;

[0041] 30, second positioning assembly; 301, fourth positioning member; 3011, through hole; 302, fifth positioning member; 303, first positioning pin;

[0042] 50, turntable assembly; 501, first mounting plate; ​

[0043] 60, second mounting plate; 601, second mounting hole; 701, positioning seat; 702, first supporting unit; 703, first pressing unit; 704, second supporting unit; 705, second pressing unit; 706, third pressing unit. DETAILED DESCRIPTION

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. It should be noted that, the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0045] The brake caliper is an important component of the brake, and the brake caliper on the automobile is usually irregular in shape. During machining of the brake caliper, the brake caliper needs to be fixed on a machine tool for machining, so as to ensure machining precision.

[0046] As Figure 1 shown, the brake caliper includes a cylinder hole 10A, an ear hole 10B and an end face 10G thereof, a hook jaw end face 10C, a circular arc face 10D, a cylinder hole end face 10E, an oil inlet hole and an exhaust hole 10F. During machining and production of the brake caliper, the holes and the end faces need to be machined, so as to ensure that machining precision of the holes and the end faces meets assembly requirements of the subsequent brake.

[0047] Generally, the machining procedure of the brake caliper is as follows: first step, opening a file of the brake caliper and machining the circular arc face 10D; second step, machining the ear hole 10B and the end face 10G thereof; third step, machining the cylinder hole 10A; fourth step, machining the oil inlet hole and the exhaust hole 10F. After machining, parallelism of the hook jaw end face 10C and the ear hole end face 10G needs to reach 0.08, and perpendicularity of the cylinder hole 10A and the hook jaw end face 10C needs to reach 0.1, so as to meet assembly and use requirements of the subsequent brake.

[0048] In the above machining process, the circular arc surface 10D needs to be machined in the first step to meet the machining precision requirements. However, due to the limitations of machining equipment and tools, the machining precision of the first step often cannot meet the requirements. If the machining precision cannot meet the requirements, since the machining surface of the first step is used for positioning in the second and third machining steps, the machining precision of the lug hole 10B and its end surface 10G, the cylinder hole 10A, and the oil inlet hole in the second and third machining steps cannot meet the requirements, such as the parallelism of the claw end surface 10C and the lug hole end surface 10G and the perpendicularity of the cylinder hole 10A, thereby affecting the sliding resistance of the caliper body of the brake, increasing the stiction, and even causing the vehicle to drag and the friction pad to abnormally wear. In addition, the brake requires more fluid, which increases the brake pedal stroke and causes the left and right brake forces to be different, resulting in brake deviation and other problems. In severe cases, it can affect driving safety.

[0049] Therefore, the example embodiments of the present application provide a brake caliper machining clamp and a machining process. The machining clamp includes a first clamp for the second machining step and a second clamp for the third machining step. The brake caliper can be precisely positioned, the cylinder hole and the cylinder hole end surface are machined at the same time in one positioning, the lug hole, the lug hole end surface, and the claw end surface are machined using the cylinder hole end surface machined in the second step for positioning in the third step, and the parallelism of the claw end surface and the lug hole end surface and the perpendicularity of the cylinder hole and the claw end surface can meet the machining precision requirements. The parallelism of the claw end surface and the lug hole end surface can be improved to 0.005, and the perpendicularity of the cylinder hole and the claw end surface can be improved to 0.03.

[0050] An example embodiment of the present application provides a brake caliper machining clamp, as shown in Figure 2 and 9 The brake caliper machining clamp includes a first clamp for the second machining step and a second clamp for the third machining step. The first clamp and the second clamp precisely position the brake caliper for the second machining step and the third machining step, respectively, so that the machining precision meets the requirements.

[0051] The first clamp includes a lathe adapter disc 10. One side of the lathe adapter disc 10 is connected to a lathe, and the other side is fixedly connected to a first positioning assembly 20. The first positioning assembly 20 is fixedly connected to a second positioning assembly 30. The first positioning assembly 20 and the second positioning assembly 30 form a containing space for placing the brake caliper. One side of the cylinder hole 10A of the brake caliper is close to the first positioning assembly 20 and is placed in the containing space. The brake caliper is coarsely positioned by the second positioning assembly 30 and precisely positioned by the first positioning assembly 20. Through two positioning, the positioning precision of the brake caliper can be ensured, and the machining precision of the brake caliper can meet the requirements.

[0052] The second clamp is arranged on the rotary table assembly 50 arranged on the machine tool workbench, and the rotary table assembly 50 comprises a first mounting plate 501 and a four-axis rotary table, the first mounting plate 501 is fixed on the four-axis rotary table, and the four-axis rotary table can drive the first mounting plate 501 to rotate. The first mounting plate 501 is provided with the second mounting plate 60, and the second mounting plate 60 is fixedly provided with a positioning seat 701 for supporting and pre-positioning the brake caliper; along the length direction of the first mounting plate 501, one side of the positioning seat 701 is provided with a first supporting unit 702 and a first pressing unit 703, the first supporting unit 702 is located between the positioning seat 701 and the first pressing unit 703, and the other side of the positioning seat 701 is provided with a second supporting unit 704 and a second pressing unit 705, the second supporting unit 704 is located between the positioning seat 701 and the second pressing unit 705; along the width direction of the first mounting plate 501, one side of the positioning seat 701 is provided with a third pressing unit 706. The first supporting unit 702 and the second supporting unit 704 support the outer circumferential surface of the lug hole respectively, the first pressing unit 703 and the second pressing unit 705 press the outer circumferential surface of the lug hole respectively, and the third pressing unit 706 presses the outer circumferential surface of the cylinder hole, so that the brake caliper is supported and pressed at three points, the support and pressing are uniformly distributed, and the positioning precision is high.

[0053] As shown in Figures 2 to 6 The first positioning assembly 20 comprises a first positioning piece 201 fixedly connected with the lathe adapter disc 10, the inside of the first positioning piece 201 is provided with a first connecting piece 202, the first connecting piece 202 is fixedly arranged on the lathe adapter disc 10, the inside of the first connecting piece 202 is provided with a mounting hole, the mounting hole is provided with a second connecting piece 203, the second connecting piece 203 is sleeved with a second positioning piece 204, and the end is provided with a third positioning piece 205. The side of the second connecting piece 203 close to the lathe adapter disc 10 is connected with the lathe main shaft pull cylinder, and is used for driving the second positioning piece 204 and the third positioning piece 205 to move, so as to realize the positioning of the brake caliper.

[0054] The first positioning piece 201 comprises a first positioning part 2011 fixedly connected with the lathe adapter disc 10, the two sides of the first positioning part 2011 are respectively provided with a second positioning part 2012, the first positioning part 2011 and the second positioning part 2012 are integrally formed, the first positioning part 2011 is provided with a mounting hole for mounting the first connecting piece 202, and the second positioning part 2012 is provided with a second positioning pin 207. When the brake caliper is placed on the positioning clamp, the second positioning pin 207 is tightened, so as to position the brake caliper.

[0055] As shown in Figure 7 The second positioning piece 204 is provided with a positioning claw 2041 for center positioning the brake caliper.

[0056] In an embodiment, the second positioning member 204 is provided with four positioning claws 2041 arranged in a circumferential direction, and the end of the positioning claw 2041 is provided with a clamping surface 2042. When the brake caliper is positioned, the positioning claw 2041 is extended under the action of the lathe spindle, and the clamping surface 2042 is clamped with the outer circumferential surface of the cylinder hole 10A of the brake caliper to position the brake caliper.

[0057] In an embodiment, the second connecting member 203 is further sleeved with a spring, and the spring is located between the second connecting member 203 and the second positioning member 204, and the spring is used to buffer the movement of the second positioning member 204.

[0058] As shown in Figure 8 , the third positioning member 205 is provided with a floating pressure head 2051 for pressing the brake caliper. In an embodiment, the third positioning member 205 is provided with three floating pressure heads 2051, and the connecting line of the three floating pressure heads 2051 is arranged in a triangular shape to press the brake caliper. At the same time, the floating pressure head 2051 has a certain amount of floating, which can adapt to the uneven top surface of the brake caliper blank.

[0059] In an embodiment, referring to Figure 3 , the first positioning assembly 20 further comprises a guide member 206 fixedly connected with the first connecting member 202. The guide member 206 is provided with a first set of guide grooves and a second set of guide grooves, and the positioning claw 2041 of the second positioning member 204 is accommodated in the first set of guide grooves, and the first set of guide grooves is used to guide the movement of the positioning claw 2041; the third positioning member 205 is accommodated in the second guide groove, and the second guide groove is used to guide the movement of the third positioning member 205.

[0060] In an embodiment, the first positioning assembly 20 further comprises a counterweight 208 fixedly arranged on the first connecting member 202, and the counterweight 208 can reduce the dynamic balance of the first clamp.

[0061] The second positioning assembly 30 comprises a fourth positioning member 301 fixedly connected with the first positioning assembly 20, and the fourth positioning member 301 is provided with a fifth positioning member 302.

[0062] The fourth positioning member 301 is provided with a through hole 3011, and the through hole 3011 is arranged with the cylinder hole 10A of the brake caliper as the center. After the brake caliper is positioned and clamped, the cutter can process the cylinder hole 10A through the through hole 3011.

[0063] In an embodiment, the fifth positioning member 302 is a T-shaped block, and the fifth positioning member 302 is fixedly arranged on the fourth positioning member 301 and located between the first positioning member 201 and the fourth positioning member 301. The fifth positioning member 302 is provided with a first positioning pin 303, and the first positioning pin 303 is used for roughly positioning the bottom of the brake caliper.

[0064] As shown in Figure 3 , the first mounting plate 501 is provided with a first mounting hole, and the second mounting plate 60 is provided with a second mounting hole 601. The first mounting hole and the second mounting hole 601 are provided with a ball-type lock quick-change assembly to realize the quick mounting and dismounting of the first mounting plate 501 and the second mounting plate 60, and facilitate the quick mounting and dismounting of the comprehensive clamp and the rotary table assembly 50.

[0065] In an embodiment, as shown in Figures 9 to 11 , in order to perform accurate support positioning, the first support unit 702 and / or the second support unit 704 are support cylinders. After the support rod contacts the brake caliper, it will automatically stop moving and perform self-locking. Using a support cylinder for support can adapt to the size difference caused by the blank brake caliper.

[0066] In an embodiment, the first pressing unit 703, the second pressing unit 705, and the third pressing unit 706 are pressing cylinders. The pressing cylinder is preferably an oil cylinder, and the first mounting plate 501 is provided with a hydraulic oil circuit.

[0067] As shown in Figure 9 , the positioning seat 701 includes a support portion, and the top surface of the support portion is an arc surface. The curvature of the arc surface is adapted to the curvature of the inner concave arc surface of the brake caliper to support and position the brake caliper.

[0068] A machining process of a brake caliper, comprising:

[0069] S110: using a horizontal milling machine to machine the hook end surface 10C and the circular arc surface 10D.

[0070] S120: positioning the brake caliper by the first clamp, and using a horizontal lathe to machine the cylinder hole 10A and the cylinder hole end surface 10E.

[0071] S130: positioning the brake caliper by the second clamp, and using a vertical machining center to machine the lug hole 10B, the lug hole end surface 10G, and the hook end surface 10C.

[0072] S140: using a vertical machining center to machine the oil inlet hole and the exhaust hole 10F.

[0073] Specifically, in the S110 machining process, when the hook end surface is machined using the horizontal milling machine, a machining allowance of 0.3mm-0.5mm is reserved to machine the hook end surface again in the S130 machining process.

[0074] In the S120 machining process, the lathe adapter disc 10 of the first clamp and the second connecting piece 203 are connected with the lathe, the brake caliper is placed on the first clamp, and the fourth positioning piece 301 and the fifth positioning piece 302 coarsely position the brake caliper; then under the action of the lathe main shaft pulling cylinder, the positioning claw 2041 and the floating pressure head 2051 extend, the positioning claw 2041 contacts the top of the brake caliper, and then the brake caliper is centered and positioned, realizing self-centering of the brake caliper; the pulling cylinder continues to drive the floating pressure head 2051 to move and tightly press the top surface of the brake caliper, realizing precise positioning of the brake caliper. After positioning by the positioning clamp, the machine tool machines the cylinder hole 10A and the cylinder hole end face 10E, so that the machining requirements of the cylinder hole 10A meet the precision requirements.

[0075] In the S130 machining process, the brake caliper is placed on the positioning seat 701, the first supporting unit 702 supports the brake caliper and limits the movement of the brake caliper, then the first pressing unit 703 starts and presses the brake caliper, then the third pressing unit 706 starts and presses the brake caliper, the second supporting unit 704 supports the brake caliper, and finally the second pressing unit 705 starts and presses the brake caliper, at this time, the positioning of the brake caliper is completed, and the lug hole 10B, the lug hole end face 10G and the hook end face 10C can be machined.

[0076] Specifically, after the lug hole 10B and the lug hole end face 10G are machined, the second clamp and the brake caliper are rotated 90° by the rotary table assembly 50, so that the axis direction of the brake caliper cylinder hole 10A is the same as the height direction of the rotary table assembly 50, and the hook end face 10C is parallel to the workbench surface of the machine tool. At this time, the machining tool is replaced by a disc-shaped milling cutter, and the hook end face 10C is machined.

[0077] Using the machining process of the present application, the cylinder hole 10A and the cylinder hole end face 10E are sequentially machined using one positioning in the S120 process, which can ensure that the parallelism requirements of the cylinder hole 10A and the cylinder hole end face 10E are met. At the same time, the lug hole 10B, the lug hole end face 10G and the hook end face 10C are machined using the cylinder hole end face 10E machined in the S120 machining process in the S130 machining process, which can ensure that the parallelism of the hook end face 10C and the lug hole end face 10G, the perpendicularity of the cylinder hole 10A and the hook end face 10C, etc. meet the machining precision requirements. The parallelism of the lug hole end face 10G and the hook end face 10C can be improved to 0.005, and the perpendicularity of the cylinder hole 10A and the hook end face 10C can be improved to 0.03.

[0078] In this application, the terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0079] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the preferred embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to encompass within their scope all such variations and modifications as are included within the scope of the application.

[0080] It is apparent that many modifications and variations of this application can be effected although only a few are specified and described herein. No limitation is intended by the description set forth in this patent other than that described in the claims and the spirit and scope of the disclosure.

Claims

1. A brake caliper machining fixture, characterized in that, It includes a first fixture for machining cylinder bores and cylinder bore end faces, and a second fixture for machining lug holes, lug hole end faces, and claw end faces. The first fixture includes a lathe adapter plate, one side of which is connected to a lathe and the other side is fixedly connected to a first positioning component. The first positioning component is fixedly connected to a second positioning component. The brake caliper is coarsely positioned by the second positioning component and precisely positioned by the first positioning component. The second clamp is mounted on a turntable assembly, which includes a first mounting plate, a second mounting plate, and a positioning seat fixedly mounted on the second mounting plate. The positioning seat is used to support the brake caliper and pre-position the brake caliper. Along the length direction of the first mounting plate, a first support unit and a first clamping unit are provided on one side of the positioning seat, and a second support unit and a second clamping unit are provided on the other side of the positioning seat. Along the width direction of the first mounting plate, a third clamping unit is provided on one side of the positioning seat. The first positioning component includes a first positioning member fixedly connected to the lathe adapter plate. The first positioning member has a first connecting member inside. The first connecting member is fixedly mounted on the lathe adapter plate and has a second connecting member inside. The second connecting member is fitted with a second positioning member and has a third positioning member at its end. The second positioning member is provided with a positioning claw, which is used to center the brake caliper; The third positioning component is provided with a floating pressure head, which is used to press the brake caliper.

2. The brake caliper machining fixture according to claim 1, characterized in that, The second positioning component includes a fourth positioning element fixedly connected to the first positioning component, and a fifth positioning element is provided on the fourth positioning element.

3. The brake caliper machining fixture according to claim 2, characterized in that, The fifth positioning component is provided with a first positioning pin, which is used for coarse positioning of the brake caliper.

4. The brake caliper machining fixture according to claim 1, characterized in that, The first positioning component further includes a guide member, which is fixedly connected to the first connecting member.

5. The brake caliper machining fixture according to claim 1, characterized in that, The first mounting plate is provided with a first mounting hole, and the second mounting plate is provided with a second mounting hole. A ball lock quick-change assembly is provided in the first mounting hole and the second mounting hole to realize the quick installation and removal of the first mounting plate and the second mounting plate.

6. A machining process for a brake caliper using a brake caliper machining fixture as described in any one of claims 1 to 5, characterized in that, include: The end face and arc surface of the hook are machined using a horizontal milling machine; The brake caliper is positioned using a horizontal lathe and the first fixture, and the cylinder bore and cylinder bore end face are machined. The brake caliper is positioned using a vertical machining center and a second fixture, and the lug hole, lug hole end face, and claw end face are machined. Use a vertical machining center to machine the oil inlet and vent holes.

7. The processing technology according to claim 6, characterized in that, When machining the end face of the hook using a horizontal milling machine, a machining allowance of 0.3mm-0.5mm should be reserved.

Images