Brake caliper bracket brake pad fixing groove processing tool

Abstract

The present invention discloses a tool for machining the fixing groove of a brake caliper bracket and a shank for internal Morse tools. The tool comprises a multi-edge milling cutter with a tapered shank and an internal Morse tool holder. The multi-edge milling cutter is mounted on the front end of the internal Morse tool holder. The multi-edge milling cutter has a multi-edge stepped three-faceted structure and specifically comprises a cutter body and a blade. The cutter body is fixedly mounted to the internal Morse tool holder, and the blade is fixedly mounted on the front end of the cutter body. The rear end of the cutter body is a milling cutter shank. The rear end face of the milling cutter shank is provided with an internal threaded hole, and the front end of the cutter body is open on the circumference. The milling section of the multi-edge milling cutter is used to machine groove B, groove C, and then grooves A, E, and F. Simultaneously, the lower chamfering section of the multi-edge milling cutter is used to machine chamfer G, and the upper chamfering section of the multi-edge milling cutter is used to machine chamfer D. This invention solves the problem of CNC milling machines being unable to automatically change tools for machining. The tool can machine the fixing groove of the brake caliper bracket and the brake pad with stable quality, high efficiency, and low cost.

Description

Technical Field

[0001] The invention relates to a brake processing tool in the field of mechanical material cutting, and in particular to a brake caliper bracket brake block fixing groove processing tool. Background Art

[0002] At present, disc brakes are widely used in automobile braking. The brake caliper bracket is a key component of the disc brake. The quality of the brake caliper bracket directly affects the performance of the brake. In severe cases, it will cause brake failure. The brake caliper bracket fixes the brake pads through the fixing grooves A, B, C, E, and F (see Figure 1 ), the brake pad and the brake disc rub against each other to complete the braking action. When machining the brake caliper bracket brake pad fixing groove, due to the complex shape (see Figure 2 Common processing techniques include: 1. Specialized machine tool broaching (suitable only for large quantities); 2. Machining on a machining center, which uses multiple toolholders, resulting in high tool costs. Furthermore, multiple toolholders require tool changes, and the tool change mechanism in machining centers is a common failure point, resulting in high equipment costs and low processing efficiency. CNC milling machines are affordable but lack tool change mechanisms, making them incapable of processing. Consequently, the cost of manufacturing brake caliper brackets remains high. Summary of the Invention

[0003] In order to solve the problems existing in the background technology, the present invention provides a tool for machining a brake caliper bracket brake pad fixing groove.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] 1. A tool for machining the brake caliper bracket brake pad fixing groove:

[0006] The machining tools include a tapered shank multi-blade milling cutter and an internal Mohs tool holder. The tapered shank multi-blade milling cutter is installed on the front end of the internal Mohs tool holder. The tapered shank multi-blade milling cutter is a multi-blade stepped three-edge structure, specifically including a cutter body and a blade. The cutter body is fixedly installed and connected to the internal Mohs tool holder, and the blade is fixedly installed at the front end of the cutter body. The rear end of the cutter body is the milling cutter holder. The rear end face of the milling cutter holder is provided with an internal threaded hole, and the circumferential surface of the front end of the cutter body is provided with a plurality of six tool grooves evenly spaced along the circumferential direction, and a welded blade is installed in each tool groove.

[0007] The inner Morse tool holder includes an inner Morse sleeve and a tightening screw. The milling cutter handle of the blade is installed in the front end of the inner Morse sleeve, and the tightening screw is installed in the rear end of the inner Morse sleeve. The tightening screw passes through the middle hole between the front and rear ends of the inner Morse sleeve and is screwed into the internal threaded hole of the milling cutter handle. Tighten the tightening screw to fix the milling cutter handle on the inner Morse tool holder.

[0008] The outer periphery of the blade is provided with a milling groove section, the width of the milling groove section on both sides is the same as the width of the F groove; the lower end edge of the blade is provided with a lower chamfer section, the chamfer angle of the lower chamfer section is the same as the angle of the G chamfer; the upper end edge of the blade is provided with an upper chamfer section, the chamfer angle of the upper chamfer section is the same as the angle of the D chamfer;

[0009] The blade 12 is provided with a lower chamfer section with an angle of 90 degrees, which is the same as the angle at D of the brake caliper bracket and is used to process the lower chamfer at D; the milling groove section is coaxial with the core line of the milling cutter axis, and the A, B, C, E, and F grooves of the brake caliper bracket fixing the brake pad are processed in steps by changing the movement of each axis of the CNC milling machine; the upper chamfer section has an angle of 90 degrees and is the same as the angle at G of the brake caliper bracket and is used to process the upper chamfer at G, so that the same tool can complete the processing of multiple grooves A, B, C, E, and F and multiple chamfered grooves D and G of the brake caliper bracket fixing the brake pad.

[0010] 2. A method for machining a tool for machining a brake caliper bracket brake pad fixing groove, characterized in that:

[0011] The same tool is used to complete the five brake shoe fixing grooves A, B, C, E, and F and the two chamfers D and G on the brake caliper bracket. The brake caliper bracket is U-shaped, and the two ends of the U-shaped brake caliper bracket form two caliper arms. The two caliper arms are provided with guide pin holes and piston holes at their respective arm ends. The inner sides of the arm ends near the guide pin holes and piston holes are provided with inner brake shoe slots. The inner brake shoe slots extend toward the middle of the brake caliper bracket, with a boss in the middle. The two caliper arms are provided with piston holes at their respective arm ends. The two caliper arms are fixedly connected at the root by a connecting arm. The inner portion between the connecting arm and the two caliper arms connected at both ends is provided with a boss. A transition support rib is provided on the side, and a side step is formed between the transition support rib and the caliper arm; the A groove is formed between the ends of the two caliper arms on the inner side of the U-shaped opening, the B groove is formed between the ends of the two caliper arms on the inner side of the U-shaped opening, the C groove is formed between the ends of the inner convex platform of the two caliper arms, the D chamfer is the chamfer at the upper and lower edges of the ends of the inner convex platform of the two caliper arms, the E groove is the width step groove on both sides of the inner convex platform of the two caliper arms, the F groove is the groove formed between the side step at each caliper arm and the side surface of the inner convex platform, and the G chamfer is the chamfer of the outer edge of the side step of the brake caliper bracket; the processing method includes:

[0012] First, install the tapered shank multi-edge milling cutter into the internal Morse tool holder, tighten it with the tightening screw, and measure the tool parameters;

[0013] Then, use the milling section of the tapered shank multi-edge milling cutter to process the B groove, the C groove, and then the A groove, E groove, and F groove. At the same time, use the lower chamfering section of the tapered shank multi-edge milling cutter to process the G chamfer and use the upper chamfering section of the tapered shank multi-edge milling cutter to process the D chamfer.

[0014] Finally, use a digital vernier caliper to measure the width of each groove and the opening size to see if they meet the requirements.

[0015] The direction in which the knife groove is opened forms an angle of 7 degrees with the radial axis of the knife body.

[0016] The tool of the present invention can meet the processing requirements of the brake block fixing groove of the brake caliper bracket and other parts.

[0017] The beneficial effects of the present invention are:

[0018] The invention adopts an inner Morse shank equipped with a tapered shank multi-edge milling cutter to process the brake caliper bracket brake block fixing groove, thereby effectively solving the problem that a numerically controlled milling machine cannot automatically change tools for processing.

[0019] The use of the tool of the present invention to process the brake caliper bracket brake block fixing groove has stable quality, high efficiency, low cost, simple structure, convenience and practicality; and broadens the application scope of the CNC milling machine in the field of machining and cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 It is a structural schematic diagram of an existing brake caliper bracket;

[0022] Figure 2 This is a schematic diagram of the structure of a tool for machining the brake pad fixing groove of a brake caliper bracket of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a tapered shank multi-edge milling cutter tool 1 of the present invention;

[0024] Figure 4 Schematic diagram of the structure of the tapered shank multi-edge milling cutter of the present invention from a radial side view;

[0025] Figure 5 Schematic diagram of the structure of the tapered shank multi-edge milling cutter body of the present invention;

[0026] Figure 6 Schematic diagram of the radial side structure of the tapered shank multi-edge milling cutter body of the present invention;

[0027] Figure 7 This is an enlarged structural diagram of the tapered shank multi-edge milling cutter insert of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a Mohs knife handle;

[0029] Figure 9 This is a schematic diagram of groove B processing;

[0030] Figure 9 a is a schematic diagram of the processing of the left end of groove B according to the present invention;

[0031] Figure 9 b is a schematic diagram of the processing of the left end of groove B from the front according to the present invention;

[0032] Figure 9 c is a schematic diagram of the processing of the left end of groove B from the side view of the present invention;

[0033] Figure 9 d is a schematic diagram of the second front view of processing the right end of groove B according to the present invention;

[0034] Figure 10 This is a schematic diagram of C-groove processing;

[0035] Figure 10 a is a schematic diagram of the processing of the right end of the C groove according to the present invention;

[0036] Figure 10 b is a schematic diagram of processing the right end of the C groove according to the present invention;

[0037] Figure 10 c is a schematic diagram of the processing of the left end of the C groove according to the present invention;

[0038] Figure 10 d is a schematic diagram of the processing of the left end of the C groove according to the present invention;

[0039] Figure 11 Schematic diagram of A, E, F grooves, D, G chamfering processing;

[0040] Figure 11 a is a schematic diagram of the present invention for processing A, E, F grooves and D, G chamfers from the front left end;

[0041] Figure 11 b is a schematic diagram of the processing of the grooves A, E, F, and the chamfers D, G from the left side of the present invention;

[0042] Figure 11 c is a schematic diagram of the present invention for processing the grooves A, E, F, and the right end of the chamfers D and G as viewed from the front;

[0043] Figure 11 d is a schematic diagram of the processing of the grooves A, E, F, and the chamfers D, G from the right side of the present invention;

[0044] Figure 12 This is the process flow chart for fixing the brake pad groove for the brake caliper bracket.

[0045] In the figure: a tapered shank multi-edge milling cutter 1, an internal Morse tool holder 2, a cutter body 11, a blade 12, a tool groove 111, a milling cutter handle 112, an internal threaded hole 113, a lower chamfer section 121, a milling groove section 122, an upper chamfer section 123, an internal Morse sleeve 21, and a tightening screw 22. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0047] like Figure 2 As shown, the specific implementation includes a tapered shank multi-edge milling cutter 1 and an inner Morse tool holder 2. The tapered shank multi-edge milling cutter 1 is installed at the front end of the inner Morse tool holder 2. The tapered shank multi-edge milling cutter 1 is a multi-edge stepped three-face blade structure, as shown in FIG. Figure 3 and Figure 4 As shown, it specifically includes a knife body 11 and a blade 12. The knife body 11 is fixedly installed and connected to the inner Morse knife handle 2, and the blade 12 is fixedly installed at the front end of the knife body 11. Figure 5 and Figure 6 As shown, the rear end of the cutter body 11 is a milling cutter handle 112, and the rear end face of the milling cutter handle 112 is provided with an internal threaded hole 113. The circumferential surface of the front end of the cutter body 11 is provided with a plurality of six cutter grooves 111 evenly spaced along the circumference, and a welding blade 12 is installed in each cutter groove 111.

[0048] like Figure 8 As shown, the inner Morse tool holder 2 includes an inner Morse sleeve 21 and a tightening screw 22. The tightening screw 22 is used to connect the tapered shank multi-edge milling cutter 1 to prevent the milling cutter from loosening and ensure that the tool is firmly connected and has strong rigidity. The milling cutter handle 112 of the blade 12 is installed in the front end of the inner Morse sleeve 21, and the tightening screw 22 is installed in the rear end of the inner Morse sleeve 21. The tightening screw 22 passes through the narrowed hole in the middle between the front and rear ends of the inner Morse sleeve 21 and then screws into the internal threaded hole 113 of the milling cutter handle 112. The tightening screw 22 is tightened to fix the milling cutter handle 112 on the inner Morse tool holder 2. In this way, the tapered shank multi-edge milling cutter 1 is installed on the inner Morse tool holder 2 through the milling cutter handle 112 of the blade 12. The inner Morse connection ensures coaxiality with an accuracy of within 0.005mm.

[0049] like Figure 7 As shown, the blade 12 is provided with a lower chamfering section 121, a slot milling section 122, and an upper chamfering section 123. The lower chamfering section 121, the slot milling section 122, and the upper chamfering section 123 are used to process the opening slots A, B, C, E, and F and the two chamfers D and G. The outer periphery of the blade 12 is provided with a slot milling section 122, and the width of both sides of the slot milling section 122 is the same as the width of the F slot; the lower end edge of the blade 12 is provided with a lower chamfering section 121, and the chamfer angle of the lower chamfering section 121 is the same as the angle of the G chamfer; the upper end edge of the blade 12 is provided with an upper chamfering section 123, and the chamfer angle of the upper chamfering section 123 is the same as the angle of the D chamfer.

[0050] The blade 12 is provided with a lower chamfering section 121 with an angle of 90 degrees, which is the same as the angle at D of the brake caliper bracket and is used to process the lower chamfer at D; the milling groove section 122 is coaxial with the core line of the milling cutter axis, and the A, B, C, E, and F grooves of the brake caliper bracket fixing the brake pad are processed in steps by changing the movement of each axis of the CNC milling machine; the upper chamfering section 123 has an angle of 90 degrees and is the same as the angle at G of the brake caliper bracket and is used to process the upper chamfer at G, so that the same tool can complete the processing of multiple grooves A, B, C, E, and F and multiple chamfered grooves D and G of the brake caliper bracket fixing the brake pad.

[0051] like Figure 1 As shown, the existing brake caliper bracket fixing brake shoe groove consists of: A, B, C, E, F grooves and two chamfers D and G, and the structure is relatively complex.

[0052] The brake caliper bracket is a U-shaped opening, and the two ends of the U-shape of the brake caliper bracket form two caliper arms. The two caliper arms are provided with guide pin holes at their respective arm ends, and the inner sides of the arm ends close to the guide pin holes are provided with inner brake block slots. The inner brake block slots extend toward the middle of the brake caliper bracket, with a boss in the middle. The two caliper arms are fixedly connected at the root by a connecting arm, and through holes for connecting bolt installation are provided at both ends of the connecting arm. Transition support ribs are provided on the inner side between the connecting arm and the two caliper arms connected to its two ends, and side steps are formed between the transition support ribs and the caliper arms.

[0053] Groove A is a groove formed between the ends of the two caliper arms facing the inner side of the U-shaped opening beside the inner boss, groove B is a groove formed between the ends of the two caliper arms facing the outer side of the U-shaped opening beside the inner boss, groove C is a groove formed between the ends of the inner boss of the two caliper arms, chamfer D is the chamfer at the upper and lower edges of the ends of the inner boss of the two caliper arms, groove E is the step groove with width on both sides of the inner boss of the two caliper arms, groove F is a groove formed between the side step at each caliper arm and the side surface of the inner boss, and chamfer G is the chamfer of the outer edge of the side step of the brake caliper bracket.

[0054] The present invention uses the same tool to complete the five brake pad fixing grooves A, B, C, E, and F and the two chamfers D and G on the brake caliper bracket. Figure 12 As shown, the specific implementation process includes:

[0055] First, install the tapered shank multi-edge milling cutter 1 into the inner Morse tool holder 2, tighten and fix it with the tightening screw 22, and measure the tool parameters.

[0056] Then, use the milling section of the tapered shank multi-edge milling cutter to machine groove B, groove C, and then grooves A, E, and F. At the same time, use the lower chamfering section of the tapered shank multi-edge milling cutter to machine chamfer G, and use the upper chamfering section of the tapered shank multi-edge milling cutter to machine chamfer D. Finally, use a digital vernier caliper to measure the width of each groove and the opening size to see if they meet the requirements.

[0057] like Figures 9 to 11The specific implementation process is as follows:

[0058] Process from top to bottom, first process the top B groove, the groove is divided into left and right ends, first process the left end of B groove, the milling cutter Y axis direction along the press Figure 9 As shown in (a), move to a position 5mm away from the left front end of the workpiece, and feed the tool along the X-axis direction with the B slot opening size minus the milling cutter radius size as the coordinate. Move the Z-axis up and down so that the lower edge of the milling slot end 122 of the milling cutter is the upper plane of the convex groove of the workpiece E, which is the numerical coordinate of the Z-axis of the CNC milling machine. Figure 9 As shown in (b), at this time, the Z axis and the X axis remain stationary, and the Y axis moves in the positive direction to cut with the milling end 122 of the milling cutter, and the milling cutter is cut to 2 mm from the left rear end of the workpiece. Figure 9 As shown in (c), the left end of groove B is processed.

[0059] The X direction and the X axis are the horizontal radial direction along the brake caliper bracket, the Y direction and the Y axis are the axial direction along the piston hole, and the Z direction and the Z axis are along the up-down direction of the brake caliper (up-down direction in the figure).

[0060] Then the Z axis and Y axis remain stationary. The X axis moves in the positive direction to cut to the opening size at the right end of groove B. Figure 9 (d) Then the Z axis and X axis remain stationary, and the Y axis moves in the negative direction to start cutting the right end of groove B. The milling cutter mills to 5mm from the right front end of the workpiece. Figure 9 As shown in (a), the right end of groove B is machined. At this time, the upper surface of groove B and groove E is machined. Then, the Y axis and X axis do not move, and the milling cutter descends along the Z axis according to the program so that the lower edge of the milling groove end 122 of the milling cutter is lower than the upper surface of groove F of the workpiece. Figure 10 As shown in a, the Z axis and X axis remain stationary, and the Y axis moves in the positive direction to cut the right end of the C groove with the milling end 122 of the milling cutter. The milling cutter is processed to 2mm from the right rear end of the workpiece. Figure 10 As shown in (b), the right end of the C groove is processed, and then the Z axis and Y axis remain stationary, and the X axis moves in the negative direction to the opening size of the left end of the C groove. Figure 10 At (C), the Z axis and X axis remain stationary, and the Y axis moves in the negative direction. The milling end 122 of the milling cutter begins to cut the left end of the C groove. The milling cutter mills to 5mm from the left front end of the workpiece. Figure 10 As shown in (d), the left end of groove C is machined. Then the Y and X axes do not move, and the milling cutter descends the Z axis by a certain value as programmed. Figure 11 As shown in (a), the rear Z axis and X axis do not move, and the Y axis moves in the positive direction. The milling end 122 of the milling cutter cuts the left end groove of groove A, the lower chamfering section 121 processes the left end chamfer of G, and the upper chamfering end 123 processes the left end chamfer of D. The milling cutter processes until it is 2 mm away from the left rear end of the workpiece. Figure 11As shown in (b), the left end of groove A, the left end of chamfer G, and the left end of chamfer D are completed; at this time, the Z axis and Y axis remain stationary, and the X axis moves in the negative direction to the opening size of the right end of groove A. Figure 11 At (C), the Z axis and the X axis remain stationary, and the Y axis moves in the negative direction. The milling end 122 of the milling cutter starts cutting the right end of the A groove. The lower chamfering section 121 processes the right end chamfer of G, and the upper chamfering end 123 processes the right end chamfer of D. The milling cutter mills to 5 mm from the right front end of the workpiece. Figure 11 As shown in (d), the right end of groove A is processed, and grooves A, E, F, and chamfers D and G are all processed.

[0061] At this point, the A, B, C, E, and F grooves of the brake caliper bracket fixing the brake pad are processed step by step by changing the movement of each axis of the CNC milling machine; the angle of the upper chamfer section 123 is 90 degrees, which is the same as the angle at G of the brake caliper bracket and is used to process the upper chamfer at G, so that the same tool can complete the processing of multiple grooves A, B, C, E, and F and multiple chamfered grooves D and G of the brake caliper bracket fixing the brake pad.

[0062] The direction of the cutter groove 111 is at an angle of 7 degrees to the radial axis of the cutter body 11, which reduces the cutting load of the blade. The front end of the cutter body is shaped and its size is designed to be 1mm smaller than the shape of the brake caliper bracket.

[0063] The tool of the present invention has a simple structure, blades arranged at a certain angle, strong tool rigidity, and high processing efficiency. It meets the requirement of machining multiple grooves and chamfers in a brake caliper bracket fixing brake pad using the same tool on a CNC milling machine without a tool changer. The tool and processing method of the present invention achieve stable quality, high efficiency, and low cost in machining the brake caliper bracket brake pad fixing groove.

Claims

1. A method for machining a brake caliper bracket brake pad fixing groove using a machining tool, characterized in that: The same machining tool is used to complete the five brake pad fixing grooves A, B, C, E, and F and the two chamfers D and G on the brake caliper bracket. The brake caliper bracket is U-shaped, and two caliper arms are formed at the two ends of the U-shape of the brake caliper bracket. The two caliper arms are provided with guide pin holes and piston holes at their respective arm ends. The inner sides of the arm ends near the guide pin holes and piston holes are provided with inner brake pad slots. The inner brake pad slots extend toward the middle of the brake caliper bracket, with an inner boss in the middle. The two caliper arms are provided with piston holes at their respective arm ends. The two caliper arms are fixedly connected at their roots by a connecting arm, and the connecting arm is connected to the respective connecting arms at both ends. A transition support rib is provided on the inner side between the two connected caliper arms, and a side step is formed between the transition support rib and the caliper arm; groove A is a groove formed between the ends of the two caliper arms facing the inner side of the U-shaped opening next to the inner boss, groove B is a groove formed between the ends of the two caliper arms facing the outer side of the U-shaped opening next to the inner boss, groove C is a groove formed between the ends of the inner bosses of the two caliper arms, chamfer D is the chamfer at the upper and lower edges of the ends of the inner bosses of the two caliper arms, groove E is the width step groove on both sides of the inner bosses of the two caliper arms, groove F is a groove formed between the side step at each caliper arm and the side surface of the inner boss, and chamfer G is the chamfer of the outer edge of the side step of the brake caliper bracket; Processing methods include: First, the tapered shank multi-edge milling cutter (1) is installed into the inner Morse tool holder (2), tightened and fixed with a tightening screw (22), and the tool parameters are measured; Then, the groove B and groove C are machined using the milling section (122) of the tapered shank multi-edge milling cutter, and then the grooves A, E, and F are machined. At the same time, the chamfer G is machined using the lower chamfer section (121) of the tapered shank multi-edge milling cutter and the chamfer D is machined using the upper chamfer section (123) of the tapered shank multi-edge milling cutter. Finally, use a digital display vernier caliper to measure the width of each slot and the size of the opening to see if they meet the requirements; The machining tool comprises a tapered shank multi-edge milling cutter (1) and an inner Morse tool holder (2), wherein the tapered shank multi-edge milling cutter (1) is mounted on the front end of the inner Morse tool holder (2), and the tapered shank multi-edge milling cutter (1) is a multi-edge stepped three-edge structure, specifically comprising a cutter body (11) and a blade (12), wherein the cutter body (11) is fixedly mounted and connected to the inner Morse tool holder (2), and the blade (12) is fixedly mounted on the front end of the cutter body (11), and the rear end of the cutter body (11) is a milling cutter holder (112), and the rear end surface of the milling cutter holder (112) is provided with an internal threaded hole (113), and the front end of the cutter body (11) is provided with a plurality of six tool grooves (111) evenly spaced along the circumferential direction, and a welded blade (12) is installed in each tool groove (111); The inner Morse tool holder (2) comprises an inner Morse sleeve (21) and a tightening screw (22), the milling cutter handle (112) of the cutter body (11) is installed in the front end of the inner Morse sleeve (21), the tightening screw (22) is installed in the rear end of the inner Morse sleeve (21), the tightening screw (22) passes through the middle hole between the front and rear ends of the inner Morse sleeve (21) and is screwed into the internal threaded hole (113) of the milling cutter handle (112), and the tightening screw (22) is tightened to fix the milling cutter handle (112) on the inner Morse tool holder (2); The outer periphery of the blade (12) is provided with a milling groove section (122), and the width of both sides of the milling groove section (122) is the same as the width of the F groove; the lower end edge of the blade (12) is provided with a lower chamfer section (121), and the chamfer angle of the lower chamfer section (121) is the same as the angle of the G chamfer; the upper end edge of the blade (12) is provided with an upper chamfer section (123), and the chamfer angle of the upper chamfer section (123) is the same as the angle of the D chamfer.

2. The method for machining a brake caliper bracket brake pad fixing groove using a machining tool according to claim 1, characterized in that: The direction in which the knife groove (111) is opened forms an angle of 7 degrees with the radial axis of the knife body (11).

3. The method for machining a brake caliper bracket brake pad fixing groove using a machining tool according to claim 1, characterized in that: The blade (12) is provided with a lower chamfering section (121) with an angle of 90 degrees, which is consistent with the angle at the brake caliper bracket G and is used to process the G chamfer; the milling groove section (122) is coaxial with the milling cutter axis core line, and by changing the movement of each axis of the CNC milling machine, the A, B, C, E, and F grooves of the brake caliper bracket fixing the brake block are processed step by step; the upper chamfering section (123) has an angle of 90 degrees, which is consistent with the angle at the brake caliper bracket D and is used to process the D chamfer, so that the same processing tool can complete the A, B, C, E, and F multiple grooves and D and G multiple chamfers of the brake caliper bracket fixing the brake block groove.

Images