A machining process for a brake caliper

Abstract

The application provides a machining process of a brake caliper, which comprises the following steps: firstly, processing a hook claw end face and a circular arc face by a horizontal milling machine; then, positioning the brake caliper by a first clamp using a horizontal lathe, processing a cylinder hole and a cylinder hole end face; then, positioning the brake caliper by a second clamp using a vertical machining center, processing an ear hole, an ear hole end face and the hook claw end face; finally, processing an oil inlet hole and an exhaust hole using the vertical machining center; the cylinder hole and the cylinder hole end face are processed simultaneously in one positioning process, and the ear hole, the ear hole end face and the hook claw end face are processed by positioning the cylinder hole end face processed in the previous process in the next process, so that the parallelism between the ear hole end face and the hook claw end face and the perpendicularity between the cylinder hole and the hook claw end face can meet the machining precision requirements; the parallelism between the ear hole end face and the hook claw end face can be improved to 0.005, and the perpendicularity between the cylinder hole and the hook claw end face can be improved to 0.03.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing technology, and in particular to a processing technology for brake calipers. Background Technology

[0002] Brake calipers are an important component of brake systems. Automotive brake calipers are usually irregularly shaped. When machining brake calipers, they need to be fixed on a machine tool to ensure machining accuracy.

[0003] like Figure 1 The brake caliper shown includes a cylinder bore 10A, a lug bore 10B and its end face 10G, a claw end face 10C, an arc surface 10D, a cylinder bore end face 10E, an oil inlet hole, and an exhaust hole 10F. During the manufacturing process of the brake caliper, it is usually necessary to machine the above-mentioned holes and end faces to ensure that the machining accuracy of each hole and end face meets the assembly requirements of the subsequent brake.

[0004] Typically, the machining process for this brake caliper is as follows: Step 1: Open the brake caliper and machine the arc surface 10D; Step 2: Machine the lug hole 10B and its end face 10G; Step 3: Machine the cylinder bore 10A; Step 4: Machine the oil inlet and vent holes 10F. After machining, the parallelism between the claw end face 10C and the lug hole end face 10G must reach 0.08, and the perpendicularity between the cylinder bore 10A and the claw end face 10C must reach 0.1 to meet the subsequent assembly and use requirements of the brake.

[0005] In the above processing steps, the arc surface 10D needs to be machined to the required precision in the first step. However, due to limitations in processing equipment and tools, the precision of the first step often cannot meet the requirements. If the precision cannot meet the requirements, the machining surface of the first step is required for positioning in the second and third steps. Therefore, the machining precision of the lug hole 10B and its end face 10G, cylinder bore 10A, and oil inlet hole in the second and third steps will not meet the requirements. For example, the parallelism between the hook end face 10C and the lug hole end face 10G, and the perpendicularity between the cylinder bore 10A and the hook end face 10C will not meet the requirements. This will affect the sliding resistance of the brake caliper, resulting in increased drag force, or even driving drag and abnormal wear of the friction block, or increased brake fluid demand. This can lead to problems such as long brake pedal travel, large difference in braking force between the left and right sides, and brake deviation. In severe cases, it can affect driving safety. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a manufacturing process for brake calipers, which includes the following steps:

[0007] S110: Use a horizontal milling machine to machine the end face and arc surface of the claw;

[0008] S120: Using a horizontal lathe and the first fixture, the brake caliper is positioned and the cylinder bore and cylinder bore end face are machined.

[0009] S130: Using a vertical machining center and a second fixture, the brake caliper is positioned, and the lug hole, lug hole end face, and claw end face are machined; In step S130, the lug hole and lug hole end face are machined first, then the brake caliper is rotated 90° so that the claw end face is parallel to the machine tool worktable, and the machining tool is changed to a disc milling cutter to machine the claw end face.

[0010] S140: Use a vertical machining center to machine the oil inlet and vent holes;

[0011] 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.

[0012] 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 it. The first connecting member is fixedly mounted on the lathe adapter plate and has a second connecting member inside it. The second connecting member is fitted with a second positioning member and has a third positioning member at its end. The second positioning member has a positioning jaw for center positioning the brake caliper. The third positioning member has a floating pressure head for pressing the brake caliper.

[0013] In some embodiments of this application, in step S110, when machining the end face of the claw using a horizontal milling machine, a machining allowance of 0.3mm-0.5mm is reserved.

[0014] In some embodiments of this application, the second clamp is disposed on a turntable assembly, the turntable assembly including a first mounting plate, a second mounting plate disposed on the first mounting plate, and a positioning seat fixedly disposed 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 disposed on one side of the positioning seat, and a second support unit and a second clamping unit are disposed on the other side of the positioning seat. Along the width direction of the first mounting plate, a third clamping unit is disposed on one side of the positioning seat.

[0015] In some embodiments of this application, the second positioning component includes a fourth positioning element fixedly connected to the first positioning component, and the fourth positioning element is provided with a fifth positioning element.

[0016] In some embodiments of this application, the fifth positioning member is provided with a first positioning pin, which is used for coarse positioning of the brake caliper.

[0017] In some embodiments of this application, the first positioning component further includes a guide member, which is fixedly connected to the first connecting member; the guide member is provided with a first set of guide grooves and a second set of guide grooves.

[0018] In some embodiments of this application, the first positioning component further includes a counterweight block, which is fixedly disposed on the first connector.

[0019] In some embodiments of this application, the first positioning member includes a first positioning part fixedly connected to a lathe adapter plate, and second positioning parts are respectively provided on both sides of the first positioning part. The first positioning part and the second positioning part are integrally formed. The first positioning part is provided with a mounting hole for installing the first connector. The second positioning part is provided with a second positioning pin.

[0020] In some embodiments of this application, the second positioning member is provided with four positioning claws, which are arranged along the circumferential direction.

[0021] In some embodiments of this application, a first mounting hole is provided on the first mounting plate, and a second mounting hole is provided on the second mounting plate. 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.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects: In the processing technology of the brake caliper of this application, the end face of the claw and the arc surface are first processed by a horizontal milling machine. Then, the brake caliper is positioned by a horizontal lathe and a first fixture, and the cylinder bore and the cylinder bore end face are processed. After that, the brake caliper is positioned by a vertical machining center and a second fixture, and the lug hole, the lug hole end face, and the claw end face are processed. Finally, the oil inlet hole and the vent hole are processed by a vertical machining center. The cylinder bore and the cylinder bore end face are processed simultaneously in one positioning. At the same time, the cylinder bore end face processed in the previous process is used for positioning in the next process, and the lug hole, the lug hole end face, and the claw end face are processed. This can ensure that the parallelism between the claw end face and the lug hole end face, and the perpendicularity between the cylinder bore and the claw end face meet the processing accuracy requirements. The parallelism between the lug hole end face and the claw end face can be improved to 0.005, and the perpendicularity between the cylinder bore and the claw end face can be improved to 0.03.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0024] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a brake caliper provided in an exemplary embodiment of this application;

[0026] Figure 2 This is a flowchart of the manufacturing process of a brake caliper provided in an exemplary embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the first clamp provided in an exemplary embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the working state of the first fixture provided in an exemplary embodiment of this application;

[0029] Figure 5 This is a top view of the first clamp provided in an exemplary embodiment of this application;

[0030] Figure 6 yes Figure 5 Sectional view at point AA;

[0031] Figure 7 This is an exploded view of the first clamp provided in an exemplary embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the second positioning member provided in an exemplary embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the structure of the third positioning member provided in an exemplary embodiment of this application;

[0034] Figure 10 This is a front view of the second clamp provided in an exemplary embodiment of this application;

[0035] Figure 11 This is a top view of the second clamp provided in an exemplary embodiment of this application;

[0036] Figure 12 This is a left view of the second clamp provided in an exemplary embodiment of this application.

[0037] In the picture:

[0038] 10A, cylinder bore; 10, lathe adapter plate;

[0039] 20. First positioning component; 201. First positioning element; 2011. First positioning part; 2012. Second positioning part; 202. First connecting element; 203. Second connecting element; 204. Second positioning element; 2041. Positioning claw; 2042. Engaging surface; 205. Third positioning element; 2051. Floating pressure head; 206. Guide element; 207. Second positioning pin; 208. Counterweight;

[0040] 30. Second positioning component; 301. Fourth positioning element; 3011. Through hole; 302. Fifth positioning element; 303. First positioning pin;

[0041] 50. Turntable assembly; 501. First mounting plate;

[0042] 60. Second mounting plate; 601. Second mounting hole; 701. Positioning seat; 702. First support unit; 703. First clamping unit; 704. Second support unit; 705. Second clamping unit; 706. Third clamping unit. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0044] Brake calipers are an important component of brake systems. Automotive brake calipers are usually irregularly shaped. When machining brake calipers, they need to be fixed on a machine tool to ensure machining accuracy.

[0045] like Figure 1 The brake caliper shown includes a cylinder bore 10A, a lug bore 10B and its end face 10G, a claw end face 10C, an arc surface 10D, a cylinder bore end face 10E, an oil inlet hole, and an exhaust hole 10F. During the manufacturing process of the brake caliper, it is usually necessary to machine the above-mentioned holes and end faces to ensure that the machining accuracy of each hole and end face meets the assembly requirements of the subsequent brake.

[0046] Typically, the machining process for this brake caliper is as follows: Step 1: Open the brake caliper and machine the arc surface 10D; Step 2: Machine the lug hole 10B and its end face 10G; Step 3: Machine the cylinder bore 10A; Step 4: Machine the oil inlet and vent holes 10F. After machining, the parallelism between the claw end face 10C and the lug hole end face 10G must reach 0.08, and the perpendicularity between the cylinder bore 10A and the claw end face 10C must reach 0.1 to meet the subsequent assembly and use requirements of the brake.

[0047] In the above processing steps, the arc surface 10D needs to be machined to the required precision in the first step. However, due to limitations in processing equipment and tools, the precision of the first step often cannot meet the requirements. If the precision cannot meet the requirements, the machining surface of the first step is required for positioning in the second and third steps. Therefore, the machining precision of the lug hole 10B and its end face 10G, cylinder hole 10A, and oil inlet hole in the second and third steps will not meet the requirements. For example, the parallelism between the claw end face 10C and the lug hole end face 10G, and the perpendicularity of the cylinder hole 10A will not meet the requirements. This will affect the sliding resistance of the brake caliper, resulting in increased drag force, or even driving drag and abnormal wear of the friction block, or increased brake fluid demand. This can lead to problems such as long brake pedal travel, large difference in braking force between the left and right sides, and brake deviation. In severe cases, it can affect driving safety.

[0048] Based on this, an exemplary embodiment of this application provides a machining process for brake caliper processing. First, the end face and arc surface of the hook are machined using a horizontal milling machine. Then, the brake caliper is positioned using a horizontal lathe and a first fixture, and the cylinder bore and cylinder bore end face are machined. Next, the brake caliper is positioned using a vertical machining center and a second fixture, and the lug hole, lug hole end face, and hook end face are machined. Finally, the oil inlet and vent hole are machined using a vertical machining center. The cylinder bore and cylinder bore end face are machined simultaneously in one positioning operation. At the same time, the cylinder bore end face machined in the previous operation is used for positioning in the next operation, and the lug hole, lug hole end face, and hook end face are machined. This ensures that the parallelism between the hook end face and the lug hole end face, and the perpendicularity between the cylinder bore and the hook end face meet the machining accuracy requirements. The parallelism between the lug hole end face and the hook end face can be improved to 0.005, and the perpendicularity between the cylinder bore and the hook end face can be improved to 0.03.

[0049] An exemplary embodiment of this application provides a manufacturing process for a brake caliper, such as... Figure 2 As shown, the processing technology includes the following steps:

[0050] S110: Use a horizontal milling machine to machine the end face 10C of the claw and the arc surface 10D.

[0051] S120: Using a horizontal lathe and the first fixture, the brake caliper is positioned, and cylinder bore 10A and cylinder bore end face 10E are machined.

[0052] S130: Using a vertical machining center and a second fixture, position the brake caliper and machine the lug hole 10B, the lug hole end face 10G, and the claw end face 10C. In step S130, first machine the lug hole 10B and the lug hole end face 10G. Then, rotate the brake caliper 90° so that the claw end face 10C is parallel to the machine tool's worktable. Change the machining tool to a disc milling cutter and machine the claw end face 10C.

[0053] S140: Use a vertical machining center to machine the oil inlet and vent holes 10F.

[0054] The first and second fixtures respectively perform precise positioning of the brake calipers for the second and third machining processes, ensuring that the machining accuracy meets the requirements.

[0055] like Figures 3 to 7 As shown, the first fixture includes a lathe adapter plate 10. One side of the lathe adapter plate 10 is connected to the lathe, and the other side is fixedly connected to the first positioning component 20. The first positioning component 20 is fixedly connected to the second positioning component 30. The first positioning component 20 and the second positioning component 30 form a receiving space for placing the brake caliper. The brake caliper, with its cylinder bore 10A side close to the first positioning component 20, is placed in this receiving space and is coarsely positioned by the second positioning component 30 and precisely positioned by the first positioning component 20. Through these two positioning operations, the positioning accuracy of the brake caliper can be ensured, thereby ensuring that the machining accuracy of the brake caliper meets the requirements.

[0056] like Figures 10 to 12As shown, the second fixture is mounted on the rotary table assembly 50, which is mounted on the machine tool worktable. The rotary table assembly 50 includes 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. A second mounting plate 60 is provided on the first mounting plate 501, and a positioning seat 701 is fixedly provided on the second mounting plate 60. The positioning seat 701 is used to support the brake caliper and pre-position the brake caliper. Along the length direction of the first mounting plate 501, a first support unit 702 and a first clamping unit 703 are provided on one side of the positioning seat 701. The first support unit 702 is located between the positioning seat 701 and the first clamping unit 703. A second support unit 704 and a second clamping unit 705 are provided on the other side of the positioning seat 701. The second support unit 704 is located between the positioning seat 701 and the second clamping unit 705. Along the width direction of the first mounting plate 501, a third clamping unit 706 is provided on one side of the positioning seat 701. The first support unit 702 and the second support unit 704 support the outer peripheral surface of the lug hole respectively, the first clamping unit 703 and the second clamping unit 705 clamp the outer peripheral surface of the lug hole respectively, and the third clamping unit 706 clamps the outer peripheral surface of the cylinder hole, so that the brake caliper is supported and clamped at three points. The support and clamping are evenly distributed and the positioning accuracy is high.

[0057] like Figures 3 to 7 As shown, the first positioning assembly 20 includes a first positioning member 201 fixedly connected to the lathe adapter plate 10. A first connecting member 202 is disposed inside the first positioning member 201. The first connecting member 202 is fixedly mounted on the lathe adapter plate 10. A mounting hole is provided inside the first connecting member 202, and a second connecting member 203 is disposed in the mounting hole. A second positioning member 204 is sleeved on the second connecting member 203, and a third positioning member 205 is provided at its end. The side of the second connecting member 203 closest to the lathe adapter plate 10 is connected to the lathe spindle pull cylinder, used to drive the second positioning member 204 and the third positioning member 205 to move, thereby achieving positioning of the brake caliper.

[0058] The first positioning component 201 includes a first positioning part 2011 fixedly connected to the lathe adapter plate 10. Second positioning parts 2012 are respectively provided on both sides of the first positioning part 2011. The first positioning part 2011 and the second positioning parts 2012 are integrally formed. The first positioning part 2011 is provided with a mounting hole for installing the first connecting member 202, and the second positioning part 2012 is provided with a second positioning pin 207. When the brake caliper is placed on the positioning fixture, tightening the second positioning pin 207 can position the brake caliper.

[0059] like Figure 8 As shown, the second positioning member 204 is provided with a positioning claw 2041, which is used to center the brake caliper.

[0060] In one embodiment, the second positioning member 204 is provided with four positioning jaws 2041, which are arranged circumferentially, and the ends of the positioning jaws 2041 are provided with engagement surfaces 2042. When positioning the brake caliper, under the action of the lathe spindle pull cylinder, the positioning jaws 2041 extend, and the engagement surfaces 2042 engage with the outer peripheral surface of the cylinder bore 10A of the brake caliper to position the brake caliper.

[0061] In one embodiment, a spring is also sleeved on the second connector 203. The spring is located between the second connector 203 and the second positioning member 204, and the spring is used to buffer the movement of the second positioning member 204.

[0062] like Figure 9 As shown, a floating pressure head 2051 is provided on the third positioning member 205, which is used to press the brake caliper. In one embodiment, three floating pressure heads 2051 are provided on the third positioning member 205, and the line connecting the three floating pressure heads 2051 is arranged in a triangle to press the brake caliper. At the same time, the floating pressure head 2051 has a certain floating amount, which can adapt to the uneven top surface of the brake caliper blank.

[0063] In one embodiment, reference Figure 3 The first positioning component 20 further includes a guide member 206, which is fixedly connected to 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. The positioning claw 2041 of the second positioning member 204 is accommodated in the first set of guide grooves, which guides the movement of the positioning claw 2041. The third positioning member 205 is accommodated in the second guide groove, which guides the movement of the third positioning member 205.

[0064] In one embodiment, the first positioning component 20 further includes a counterweight 208, which is fixedly disposed on the first connector 202. The counterweight 208 can reduce the dynamic balance of the rotation of the first clamp.

[0065] The second positioning component 30 includes a fourth positioning element 301 fixedly connected to the first positioning component 20, and a fifth positioning element 302 is provided on the fourth positioning element 301.

[0066] The fourth positioning component 301 is provided with a through hole 3011, which is co-centered with the cylinder bore 10A of the brake caliper. After the brake caliper is positioned and clamped, the cutting tool can machine the cylinder bore 10A through the through hole 3011.

[0067] In one embodiment, the fifth positioning element 302 is a T-shaped block, which is fixedly mounted on the fourth positioning element 301 and located between the first positioning element 201 and the fourth positioning element 301. The fifth positioning element 302 is provided with a first positioning pin 303, which is used for coarse positioning of the bottom of the brake caliper.

[0068] like Figure 10 As shown, a first mounting hole is provided on the first mounting plate 501, and a second mounting hole 601 is provided on the second mounting plate 60. A ball lock quick-change assembly is provided in the first mounting hole and the second mounting hole 601 to realize the quick installation and disassembly of the first mounting plate 501 and the second mounting plate 60, so as to facilitate the quick installation and disassembly of the integrated fixture and the turntable assembly 50.

[0069] In one embodiment, such as Figures 10 to 12 As shown, for precise support positioning, the first support unit 702 and / or the second support unit 704 are support cylinders. After contacting the brake caliper, the support bar automatically stops moving and self-locks. Using support cylinders for support can accommodate dimensional differences caused by the unfinished brake caliper.

[0070] In one embodiment, the first clamping unit 703, the second clamping unit 705, and the third clamping unit 706 are clamping cylinders. The clamping cylinders are preferably hydraulic cylinders, and hydraulic oil circuits are provided on the first mounting plate 501.

[0071] like Figure 10 As shown, the positioning seat 701 includes a support portion, the top surface of which is an arc-shaped surface. The curvature of the arc-shaped surface matches the curvature of the concave arc surface of the brake caliper to support and position the brake caliper.

[0072] Specifically, in the S110 machining process, when machining the end face of the claw using a horizontal milling machine, a machining allowance of 0.3mm-0.5mm is reserved so that the end face of the claw can be machined again in the S130 machining process.

[0073] In the S120 machining process, the lathe adapter plate 10 of the first fixture and the second connecting member 203 are connected to the lathe. The brake caliper is placed on the first fixture, and the fourth positioning member 301 and the fifth positioning member 302 perform coarse positioning of the brake caliper. Then, under the action of the lathe spindle pull cylinder, the positioning jaw 2041 and the floating pressure head 2051 extend. After the positioning jaw 2041 contacts the top of the brake caliper, it performs centering and positioning of the brake caliper, realizing the self-centering of the brake caliper. The pull cylinder continues to drive the floating pressure head 2051 to move and press against the top surface of the brake caliper, realizing the precise positioning of the brake caliper. After positioning by this positioning fixture, the machine tool processes the cylinder bore 10A and the cylinder bore end face 10E, so that the machining requirements of the cylinder bore 10A meet the accuracy requirements.

[0074] In the S130 machining process, the brake caliper is placed on the positioning seat 701. The first support unit 702 supports the brake caliper and restricts its movement. Then, the first clamping unit 703 is activated and clamps the brake caliper. Next, the third clamping unit 706 is activated and clamps the brake caliper. The second support unit 704 is lifted to support the brake caliper. Finally, the second clamping unit 705 is activated and clamps the brake caliper. At this point, the positioning of the brake caliper is completed, and the lug hole 10B, the lug hole end face 10G, and the claw end face 10C can be machined.

[0075] Specifically, after machining the lug hole 10B and the lug hole end face 10G, the second fixture and brake caliper are rotated 90° by the turntable assembly 50, so that the axial direction of the brake caliper cylinder hole 10A is the same as the height direction of the turntable assembly 50, and the end face of the claw is parallel to the worktable surface of the machine tool. At this time, the machining tool is changed to a disc milling cutter to machine the end face 10C of the claw.

[0076] Using the machining process of this application, in step S120, the cylinder bore 10A and cylinder bore end face 10E are machined sequentially using a single positioning, ensuring the parallelism requirements of the cylinder bore 10A and cylinder bore end face 10E. Simultaneously, in step S130, the cylinder bore end face 10E machined in step S120 is used for positioning to machine the lug hole 10B, lug hole end face 10G, and hook end face 10C, ensuring that the parallelism between the hook end face 10C and the lug hole end face 10G, and the perpendicularity between the cylinder bore 10A and the hook end face 10C, meet the machining accuracy requirements. The parallelism between the lug hole end face 10G and the hook end face 10C can be improved to 0.005, and the perpendicularity between the cylinder bore 10A and the hook end face 10C can be improved to 0.03.

[0077] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0078] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0079] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A manufacturing process for a brake caliper, characterized in that, The processing technology includes the following steps: S110: Use a horizontal milling machine to machine the end face and arc surface of the claw; S120: Using a horizontal lathe and the first fixture, the brake caliper is positioned and the cylinder bore and cylinder bore end face are machined. S130: Using a vertical machining center and a second fixture, the brake caliper is positioned, and the lug hole, lug hole end face, and claw end face are machined; In step S130, the lug hole and lug hole end face are machined first, then the brake caliper is rotated 90° so that the claw end face is parallel to the machine tool worktable, and the machining tool is changed to a disc milling cutter to machine the claw end face. S140: Use a vertical machining center to machine the oil inlet and vent holes; 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 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 it. The first connecting member is fixedly mounted on the lathe adapter plate and has a second connecting member inside it. A second positioning member is sleeved on the second connecting member, and a third positioning member is provided at its end. The second positioning member has a positioning jaw for center positioning of the brake caliper. The third positioning member has a floating pressure head for pressing the brake caliper. The second clamp is mounted on the 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.

2. The processing technology of the brake caliper according to claim 1, characterized in that, In step S110, when machining the end face of the claw using a horizontal milling machine, a machining allowance of 0.3mm-0.5mm is reserved.

3. The processing technology of the brake caliper 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.

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

5. The processing technology of the brake caliper 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; the guide member is provided with a first set of guide grooves and a second set of guide grooves.

6. The processing technology of the brake caliper according to claim 1, characterized in that, The first positioning component also includes a counterweight, which is fixedly mounted on the first connector.

7. The processing technology of the brake caliper according to claim 1, characterized in that, The first positioning component includes a first positioning part fixedly connected to the lathe adapter plate, and a second positioning part is provided on both sides of the first positioning part. The first positioning part and the second positioning part are integrally formed. The first positioning part is provided with a mounting hole for installing the first connecting part. The second positioning part is provided with a second positioning pin.

8. The processing technology of the brake caliper according to claim 1, characterized in that, The second positioning component is provided with four positioning claws, which are arranged along the circumferential direction.

9. The processing technology of the brake caliper 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.

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