A method of machining a brake shoe assembly

Abstract

The application relates to a brake shoe assembly machining method, which selects a metal plate required for forming a brake shoe assembly, punches the metal plate by using a punching machine to obtain a straight plate and two arc-shaped plates, the straight plate is used for manufacturing an arc-shaped face plate, and the two arc-shaped plates are used for manufacturing two arc-shaped wing plates; the straight plate and the arc-shaped plates are sent to a punching center for punching; the punched straight plate is sent to a special coiling device for bending processing of the straight plate in a coiling mode, so that the straight plate is bent into an arc-shaped face plate; the arc-shaped face plate and the arc-shaped wing plates are fixed by punching and welding to form a brake shoe assembly; the brake shoe assembly is sent to a shaper for shaping treatment, and the machining of the brake shoe assembly is completed. The application has the advantages that the straight plate is bent in the coiling mode through cooperation of the special coiling device, and only one-time machining is required, so that the machining is very convenient and multiple machining is not required.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of brake, in particular to a brake shoe assembly processing method. BACKGROUND

[0002] The brake shoe is a friction pair of the drum brake or wedge brake, which bears the thrust of the actuator, the normal force and tangential force of the brake drum, and the supporting reaction force, and should have proper rigidity. In addition to having the strength and rigidity required as a component, the brake shoe should also have a high and stable friction coefficient as much as possible, and proper wear resistance, heat resistance, heat dissipation and heat capacity.

[0003] The brake shoe, as shown in the figure, comprises an arc panel 1 and a pair of arc wing plates 2, a plurality of bolt fixing holes are formed on the arc panel 1, and notches 12 are formed on one side of the arc panel 1, the notches 12 are two and are located on the upper and lower sides of the arc panel 1, the arc wing plates 2 are connected to the inner arc surface of the arc panel 1 in an upper and lower position, and a spring fixing hole 21 is formed on each side of the arc wing plate 2. Figure 1 When the above brake shoe is processed, a flat plate needs to be bent to form the arc panel 1 first, and then the arc panel 1 is welded with the arc wing plate 2 which is cut and formed in advance to form the required brake shoe.

[0004] The traditional bending method is through stamping forming, that is, a flat plate of the required size is placed in a special stamping die, and the stamping forming is performed by using a forming hydraulic machine. In general, the stamping forming process needs to consider the rebound amount and cracking when forming the arc plate, and it is often impossible to form the required arc plate by one-time stamping, especially for some plates with large curvature, which need to be processed for several times to obtain the required arc plate, which is very troublesome. In addition, the die required for stamping forming is often one-to-one corresponding, that is, a set of die can only stamp one specification of plate, and when stamping a plurality of specifications of arc plate, a plurality of different dies are required, and the production cost of the enterprise is also increased. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a brake shoe assembly processing method which is convenient to form.

[0006] To solve the above technical problems, the technical scheme of the present application is as follows: a brake shoe assembly processing method, the innovation point of which is that the brake shoe assembly comprises an arc panel and a pair of arc wing plates, a plurality of bolt fixing holes are formed on the arc panel, notches are formed on one side of the arc panel, the notches are two and are located on the upper and lower sides of the arc panel, the arc wing plates are connected to the inner arc surface of the arc panel in an upper and lower position, and a spring fixing hole is formed on each side of the arc wing plate, characterized by comprising the following steps

[0007] S1: punching, first, select a piece of brake shoe assembly forming the required metal plate, using a punch machine on the metal plate punching, get a straight plate and two arc-shaped plate, wherein the straight plate for making arc-shaped panel, two arc-shaped plate for making two arc-shaped wing plate;

[0008] S2: punching, the straight plate and arc-shaped plate to the punching center, using a punch respectively in the straight plate on the punching of several circular through hole, the straight plate on the circular through hole is the bolt fixing hole, in the two sides of the arc-shaped plate respectively punch a circular through hole, the arc-shaped plate is the required arc-shaped wing plate, the circular through hole on the arc-shaped plate is the spring fixing hole;

[0009] S3: bending, the straight plate after punching is sent to the dedicated coiling device, using the dedicated coiling device through the coiling way to bend the straight plate, the straight plate is bent into arc-shaped plate, the arc-shaped plate is the required arc-shaped panel;

[0010] S4: welding, the arc-shaped panel and arc-shaped wing plate are sent to the welding center, the arc-shaped panel and arc-shaped wing plate are fixed by the way of punching welding, forming the brake shoe assembly;

[0011] S5: shaping, the brake shoe assembly is sent to the shaping machine, the surface of the brake shoe assembly is shaped to remove the burr, flash and welding slag generated on the surface of the brake shoe assembly during forming, and the processing of the brake shoe assembly is completed.

[0012] Further, the dedicated coiling device comprises

[0013] a coiling machine frame;

[0014] a feeding assembly mounted on the coiling machine frame, the feeding assembly comprises a feeding platform, a feeding push plate is arranged on the feeding platform, the feeding push plate is driven by a horizontal cylinder to move reciprocally along the horizontal direction, so as to drive the straight plate to move from the feeding side of the feeding platform to the discharging side of the feeding platform, a feeding pressing plate is also arranged at the discharging side of the feeding platform, and a gap for the straight plate to pass through is left between the feeding pressing plate and the feeding platform;

[0015] a coiling assembly mounted on the coiling machine frame, the coiling assembly comprises a coiling roller and a forming baffle, the coiling roller has two, which are distributed in the upper and lower positions at the discharging side of the feeding platform, respectively, the upper pressing roller located at the upper side and the lower supporting roller located at the lower side, a gap for the straight plate to pass through is left between the upper pressing roller and the lower supporting roller, and the lower supporting roller is driven to rotate by a motor;

[0016] The forming baffle is located at the gap between the upper compression roller and the lower supporting roller, is installed on the coiling machine frame through a fixing seat, the upper end surface of the forming baffle is attached to the bottom end of the upper compression roller, a gap for the straight plate to pass through is left between the lower end surface of the forming baffle and the lower supporting roller, and the forming baffle is driven by an adjusting mechanism to approach or move away from the lower supporting roller, one side of the forming baffle approaching the lower supporting roller is an inclined surface, and the inclined surface is inclined from the side of the forming baffle approaching the upper compression roller to the side of the forming baffle approaching the lower supporting roller.

[0017] Further, a pair of feeding baffles are arranged on the feeding platform, the two feeding baffles are located on the two sides of the feeding push plate, and the feeding baffles and the feeding platform are fixed through the cooperation of bolts and nuts, a waist-shaped adjusting hole for the bolts to pass through is formed on the feeding baffle, and a circular fixing hole for the bolts to pass through is formed on the feeding platform.

[0018] Further, the feeding push plate is installed on the feeding platform through a push plate mounting seat, a guide through hole for the push plate mounting seat to be installed and horizontally moved is formed on the feeding platform, the push plate mounting seat is a reverse T-shaped structure connected by an upper guide plate and a lower limiting plate distributed upward and downward, the upper guide plate is arranged in the guide through hole and moves horizontally along the guide through hole, and the feeding push plate is vertically connected to the upper guide plate.

[0019] Further, a plurality of first grooves in the shape of rectangle distributed horizontally and a plurality of second grooves in the shape of ring distributed longitudinally are formed on the circumferential surface of the lower supporting roller, so that the surface of the lower supporting roller forms a plurality of rectangular protrusions, and the rectangular protrusions are arranged in a rectangular array after the lower supporting roller is unfolded.

[0020] Further, the adjusting mechanism is that the forming baffle and the fixing seat are fixed through a plurality of adjusting bolts, a plurality of U-shaped through holes corresponding to the adjusting bolts are formed on the side of the forming baffle away from the lower supporting roller, threaded through holes for the adjusting bolts to pass through are formed on the fixing seat, the adjusting bolts are screwed and fixed in the threaded through holes after passing through the U-shaped through holes, the connection between the forming baffle and the fixing seat is realized, a plurality of guide shafts are connected to the side of the forming baffle away from the lower supporting roller, and a guide hole corresponding to the guide shaft is formed on the fixing seat.

[0021] The processing method has the advantages that the processing method is combined with the special coiling device, the straight plate is bent in the coiling mode, the processing is realized only once, the processing is very convenient, and multiple processing is not needed; in addition, the arc-shaped panel and the arc-shaped wing plate are welded and fixed in the punching and welding mode, high-strength and high-precision welding is realized, welding deformation is reduced, the welding deformation phenomenon in the welding process caused by the too thin thickness of the arc-shaped panel and the arc-shaped wing plate is avoided, and a good processing foundation is provided for subsequent realization of the light-weight brake shoe.

[0022] The design of the special coiling device is combined between the feeding assembly and the coiling assembly, automatic coiling and bending of the straight plate are realized, manual processing is reduced, the spacing between the forming baffle and the lower supporting roller is adjusted through the cooperation of the forming baffle and the adjusting mechanism, and the processing of the straight plate with different sizes or different arc requirements is realized through the adjustment of the spacing, and the universality is higher.

[0023] The design of the adjusting mechanism is combined with the U-shaped through hole on the forming baffle, the threaded through hole on the fixing seat and the adjusting bolt to realize the connection between the forming baffle and the fixing seat, so that the adjustment of the forming baffle is more convenient, and the cooperation of the guide shaft on the forming baffle and the guide hole on the fixing seat ensures the stability of the moving track of the forming baffle when the position of the forming baffle is adjusted, avoids the phenomenon of deviation affecting the subsequent processing.

[0024] The first groove and the second groove are formed on the lower supporting roller to form a plurality of rectangular protrusions, so that the contact area between the straight plate and the lower supporting roller is reduced when the straight plate contacts the surface of the lower supporting roller, the friction is reduced, and the wear is reduced.

[0025] The design of the feeding baffle is used to limit the two sides of the straight plate, avoid the deviation of the straight plate during feeding, and also play a limiting role in the subsequent coiling processing of the straight plate, so as to avoid the deviation of the straight plate during processing and ensure the smooth processing. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described in detail below with reference to the drawings and specific embodiments.

[0027] Figure 1 It is a schematic view of the brake shoe assembly in the application.

[0028] Figure 2 It is a schematic view of the special coiling device in the application.

[0029] Figure 3 It is a front view of the special coiling device in the application.

[0030] Figure 4 is a sectional view along A-A of Figure 3

[0031] Figure 5 is a schematic view of the feeding assembly in the present application.

[0032] Figure 6 is a schematic view of the lower roll in the present application.

[0033] Figure 7 is a schematic view of the adjusting mechanism in the present application. Embodiment

[0034] The following examples can make the skilled in the art more fully understand the present application, but not therefore limit the present application in the scope of the described examples.

[0035] As Figure 1 shown in the present application, the brake shoe assembly includes an arc-shaped panel 1 and a pair of arc-shaped wing plates 2, a plurality of bolt fixing holes 11 are opened on the arc-shaped panel 1, and a notch 12 is also opened on one side of the arc-shaped panel 1, the notch 12 has two, respectively located on the upper and lower sides of the arc-shaped panel 1, the arc-shaped wing plate 2 is connected to the inner arc surface of the arc-shaped panel 1 in an up-down position, and a spring fixing hole 21 is opened on both sides of the arc-shaped wing plate 2, the bolt fixing hole 11 and the spring fixing hole 21 are both circular through holes.

[0036] The processing method of the above brake shoe assembly is realized by the following steps:

[0037] S1: punching, first, select a piece of metal plate required for brake shoe assembly forming, use the punching machine to punch the metal plate, get a straight plate and two arc-shaped plates, wherein the straight plate is used to make the arc-shaped panel 1, and the two arc-shaped plates are used to make the two arc-shaped wing plates 2.

[0038] S2: punching, the straight plate and the arc-shaped plate are sent to the punching center, and a plurality of circular through holes are punched on the straight plate by using the punching machine, the circular through holes on the straight plate are the bolt fixing holes 11, and a circular through hole is punched on both sides of the arc-shaped plate, which is the required arc-shaped wing plate 2, and the circular through hole on the arc-shaped plate is the spring fixing hole 22, and the side of the straight plate is punched in advance to process two notches 12.

[0039] S3: bending, the straight plate after punching is sent to the special coiling device, and the straight plate is bent by coiling by using the special coiling device, the straight plate is bent into an arc-shaped plate, which is the required arc-shaped panel 1.

[0040] As Figures 2-7 shown in the schematic diagram, the special coiling device includes

[0041] ​A rolling frame includes a base plate 3, a pair of side plates 31 mounted on the upper surface of the base plate 3, and a top plate 32 connecting the two side plates 31. The side plates 31 are welded and fixed to the base plate 3, and the top plate 32 is fixed to the two side plates 31 respectively by several bolts. A gap is left between the two side plates 31, so that the side plates 31 and the top plate 32 form a gantry structure.

[0042] The feeding assembly installed on the rolling mill frame, such as Figure 5 As shown, the feeding assembly includes a feeding platform 4, which is a rectangular plate. The two sides of the feeding platform 4 are fixed to two side plates 31 respectively. The side of the feeding platform 4 away from the rolling frame is the feeding side, and the side of the feeding platform 4 closer to the rolling frame is the discharging side. A feeding push plate 41 is provided on the feeding platform 4. The feeding push plate 41 is driven by a horizontal cylinder 42 to reciprocate along the horizontal direction, thereby driving the straight plate to move from the feeding side of the feeding platform 4 to the discharging side of the feeding platform 4.

[0043] The feeding push plate 41 is a rectangular plate. The feeding push plate 41 is installed on the feeding platform through the push plate mounting seat. The feeding platform 4 also has a guide through hole 44 for the push plate mounting seat to be installed and move horizontally. The guide through hole 44 is a rectangular through hole and extends along the direction from the feeding side of the feeding platform 4 to the discharging side of the feeding platform 4.

[0044] The push plate mounting base is an inverted T-shaped structure formed by connecting an upper guide plate 45 and a lower limit plate 46. Both the upper guide plate 45 and the lower limit plate 46 are rectangular plates, with the width of the upper guide plate 45 being smaller than the width of the lower limit plate 46, and the width of the lower limit plate 46 being larger than the width of the guide through hole 44. This design allows the push plate mounting base to act as a guide and limiter when it moves horizontally along the guide through hole 44, thereby ensuring the stable horizontal movement of the feeding push plate 41. To prevent the feeding push plate 41 from deviating, the upper guide plate 45 is placed inside the guide through hole 44 and moves horizontally along it. The feeding push plate 41 is vertically connected to the upper end face of the upper guide plate 45. The lower limit plate 46 is driven horizontally by a horizontal cylinder 42 mounted on the feeding platform 4, which in turn drives the feeding push plate 41 to move horizontally. In this embodiment, the horizontal cylinder 42 is a pneumatic cylinder.

[0045] A pair of upper feeding baffle plates are arranged on the upper feeding platform 4, and the two upper feeding baffle plates are located on the two sides of the upper feeding push plate 41 and are fixed between the upper feeding baffle plate and the upper feeding platform 4 through the cooperation of bolts and nuts. The upper feeding baffle plate is an L-shaped plate formed by the cooperation of a vertical plate 47 and a horizontal plate 48. A pair of waist-shaped adjusting holes 481 through which the bolts pass are formed in the horizontal plate 48 of the upper feeding baffle plate, and the extension direction of the waist-shaped adjusting holes 481 is perpendicular to the translation direction of the upper feeding push plate 41. Circular fixing holes through which the bolts pass are formed in the upper feeding platform 4, and the inner wall of the circular fixing holes is provided with an internal thread structure matched with the thread of the bolt. The upper feeding baffle plate is fixed on the upper feeding platform 4 through the cooperation of the bolts passing through the waist-shaped adjusting holes 481 in the horizontal plate 48 and the circular fixing holes in the upper feeding platform 4, so as to realize the installation of the upper feeding baffle plate. The design of the upper feeding baffle plate is to limit the two sides of the straight plate, so as to avoid the deviation of the straight plate during the feeding process, and also to limit the straight plate during the subsequent circular rolling process of the straight plate, so as to avoid the deviation of the straight plate during the processing process and ensure the smooth processing.

[0046] When it is necessary to adjust the distance between the upper feeding baffle plates, the fixing bolts are loosened respectively, so that a gap is left between the nut of the bolt and the horizontal plate 48 of the upper feeding baffle plate, and the connection state between the bolt and the circular fixing hole in the upper feeding platform 4 is ensured. Then the bracket pulls the upper feeding baffle plate to slide horizontally along the waist-shaped adjusting hole 481, so as to change the distance between the two upper feeding baffle plates. After sliding in place, the bolt is tightened again to complete the distance adjustment between the upper feeding baffle plates.

[0047] An upper feeding pressing plate 43 is arranged at the discharging side of the upper feeding platform 4, and a gap for the straight plate to pass through is left between the upper feeding pressing plate 43 and the upper feeding platform 4. The two sides of the upper feeding pressing plate 43 are respectively installed on the upper feeding platform 4 through a pressing plate fixing plate 46, and the pressing plate fixing plate 46 and the upper feeding pressing plate 43 are connected to form a character-shaped structure.

[0048] A circular rolling assembly is installed on the circular rolling machine frame. The circular rolling assembly includes a circular rolling roller and a forming baffle plate. The circular rolling roller includes two upper and lower rollers arranged at the discharging side of the upper feeding platform and located between the two side plates 31. The two circular rolling rollers are an upper pressing roller 5 located at the upper side and a lower supporting roller 6 located at the lower side. A gap for the straight plate to pass through is left between the upper pressing roller 5 and the lower supporting roller 6. The lower supporting roller 6 is driven to rotate by a motor 61.

[0049] The upper pressure roller 5 and the lower support roller 6 are respectively mounted on the side plate 31 via roller mounting seats 7. Both the upper pressure roller 5 and the lower support roller 6 are movably connected to the roller mounting seats 7 via bearings. A rectangular through hole for mounting the roller mounting seats 7 is provided on the side plate 31. The roller mounting seat 7 includes a square segment placed within the rectangular through hole on the side plate 31 and a circular segment located on the inner wall of the side plate 31. The length of the square segment matches the width of the rectangular through hole on the side plate 31, allowing the square segment to be precisely embedded within the rectangular through hole. Inside the hole, the diameter of the circular segment is larger than the width of the rectangular through hole on the side plate 31. The circular segment is used to limit the relative position between the roller mounting seat 7 and the side plate 31, preventing the roller mounting seat 7 from falling directly out of the rectangular through hole on the side plate 31. The roller mounting seat 7 for installing the lower bearing roller 6 is located at the bottom of the rectangular through hole on the side plate 31, and the roller mounting seat 7 for installing the lower bearing roller 6 is located at the upper part of the rectangular through hole on the side plate 31, and is fixed to the side plate 31 by the cooperation of the connecting rod 71.

[0050] like Figure 6 As shown in the schematic diagram, several transversely distributed rectangular first grooves and several longitudinally distributed annular second grooves are formed on the circumferential surface of the lower bearing roller 6. This creates several rectangular protrusions 61 on the surface of the lower bearing roller 6, which are arranged in a rectangular array after the lower bearing roller is unfolded. By creating the first and second grooves on the lower bearing roller 6 to form several rectangular protrusions 61, the contact area between the straight plate and the lower bearing roller 6 is reduced when the straight plate comes into contact with the surface of the lower bearing roller 6, thus reducing friction and wear.

[0051] The forming baffle 8 is located in the gap between the upper pressure roller 5 and the lower support roller 6, and is mounted on the two side plates 31 of the rolling frame by a fixing seat 81. The forming baffle 8 is designed to be inclined, and the inclination direction of the forming baffle 8 is to gradually tilt upward from the side of the forming baffle 8 that is close to the lower support roller 6. Correspondingly, the fixing seat 81 is also designed to be inclined, and the inclination direction of the fixing seat 81 is the same as the inclination direction of the forming baffle 8.

[0052] The upper end face of the forming baffle 8 is in contact with the bottom end of the upper pressure roller 5. A gap is left between the lower end face of the forming baffle 8 and the lower support roller 6 to allow the straight plate to pass through. The forming baffle 8 is driven by an adjustment mechanism to move closer to or away from the lower support roller 6. The side of the forming baffle 8 that is close to the lower support roller 6 is an inclined slope 82. The slope 82 is inclined from the side of the forming baffle 8 that is close to the upper pressure roller 5 towards the side that is close to the lower support roller 6. The inclined forming baffle 8 and the inclined slope 82 on the forming baffle 8 cooperate with the lower support roller 6 so that the straight plate can be rolled and bent into an arc-shaped plate when passing through the gap between the forming baffle 8 and the lower support roller 6.

[0053] The adjusting mechanism is that: the shaped baffle 8 and the fixed seat 81 are fixed through the cooperation of two adjusting bolts 83, two U-shaped through holes 84 corresponding to the adjusting bolts 83 are opened on the side of the shaped baffle 8 away from the lower supporting roller 6, threaded through holes for the adjusting bolts 83 to pass through are opened on the fixed seat 81, the adjusting bolts 83 are screwed and fixed with the threaded through holes on the fixed seat 81 after passing through the U-shaped through holes, the connection between the shaped baffle 8 and the fixed seat 81 is realized, and three parallel distributed guide shafts 85 are further connected to the side of the shaped baffle 8 away from the lower supporting roller 6, and guide holes corresponding to the guide shafts 85 are further opened on the fixed seat 81.

[0054] When the position of the shaped baffle 8 needs to be adjusted, the two adjusting bolts 83 are loosened, a gap is left between the nut of the adjusting bolt 83 and the upper end face of the shaped baffle 8, but the connection between the adjusting bolt 83 and the fixed seat 81 is maintained, then the shaped baffle 8 is directly pulled to reciprocate along the U-shaped through hole 84, so that the shaped baffle 8 moves close to or away from the lower supporting roller 6, and after moving in place, the two adjusting bolts 83 are tightened, and the position adjustment of the shaped baffle 8 is completed.

[0055] When the straight plate is bent, first, the straight plate to be bent is placed on the feeding platform 4, and the rear end of the straight plate is abutted against the feeding push plate 41, then the feeding push plate 41 is pulled by the horizontal cylinder 42 to move to the discharging side of the feeding platform 4, thereby pushing the straight plate to move, the straight plate passes through the gap between the feeding pressing plate 43 and the feeding platform 4, and moves to the gap between the upper pressing roller 5 and the lower supporting roller 6, when the straight plate moves to the gap between the upper pressing roller 5 and the lower supporting roller 6, the lower supporting roller 6 is driven to rotate in advance under the drive of the motor 61, to drive the straight plate to continue to move to the shaped baffle 8, and when the straight plate moves to the shaped baffle 8, the straight plate is rolled and processed by the inclined surface 82 of the shaped baffle 8, so that the straight plate is bent into an arc-shaped plate, which is the required arc-shaped panel 1.

[0056] S4: welding, the arc-shaped panel 1 and the arc-shaped wing plate 2 are sent to a welding center, the arc-shaped panel 1 and the arc-shaped wing plate 2 are fixed by punch welding, and a brake shoe assembly is formed.

[0057] S5: shaping, sending the brake shoe assembly to a shaper, and shaping the surface of the brake shoe assembly to remove burrs, flash and welding slag generated on the surface of the brake shoe assembly during the forming process, and completing the machining of the brake shoe assembly.

[0058] The machining method of the application cooperates with the special coiling device to bend the straight plate into an arc-shaped plate by coiling, which can be realized by only one machining process, and the machining is very convenient without multiple machining processes. In addition, the arc-shaped panel 1 and the arc-shaped wing panel 2 are welded and fixed by punching and welding, realizing high-strength and high-precision welding, reducing welding deformation, avoiding the welding deformation phenomenon in the welding process due to the too thin thickness of the arc-shaped panel 1 and the arc-shaped wing panel 2, and providing a good machining foundation for the subsequent realization of the lightweight brake shoe.

[0059] Those skilled in the art should understand that the application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A method for processing a brake shoe assembly, the brake shoe assembly comprising an arc-shaped panel and a pair of arc-shaped wing plates, wherein a plurality of bolt fixing holes are formed on the arc-shaped panel, and two notches are formed on one side of the arc-shaped panel, respectively located on the upper and lower sides of the arc-shaped panel; the arc-shaped wing plates are connected to the inner arc surface of the arc-shaped panel in an upper and lower position; and a spring fixing hole is formed on each side of the arc-shaped wing plate, characterized in that: The method comprises the following steps S1: punching, first, select a piece of metal sheet required for brake shoe assembly forming, using a punch to punch the metal sheet, get a straight plate and two arc-shaped plates, wherein the straight plate is used to make arc-shaped panel, two arc-shaped plates are used to make two arc-shaped wing plates; S2: punching, the straight plate and arc-shaped plate are sent to the punching center, using a punch to punch a plurality of circular through holes on the straight plate, the circular through holes on the straight plate are bolt fixing holes, a circular through hole is punched on both sides of the arc-shaped plate, the arc-shaped plate is the required arc-shaped wing plate, and the circular through hole on the arc-shaped plate is the spring fixing hole; S3: bending, the straight plate after punching is sent to the special coiling device, the straight plate is bent into an arc-shaped plate by coiling through the special coiling device, and the arc-shaped plate is the required arc-shaped panel; S4: welding, the arc-shaped panel and the arc-shaped wing plate are sent to the welding center, and the arc-shaped panel and the arc-shaped wing plate are fixed by punching and welding to form the brake shoe assembly; S5: shaping, the brake shoe assembly is sent to the shaper, and the surface of the brake shoe assembly is shaped to remove burrs, flash and welding slag generated on the surface of the brake shoe assembly during forming, so that the processing of the brake shoe assembly is completed.

2. The brake shoe assembly machining method of claim 1, wherein: The special coiling device comprises A coiling machine frame; A feeding assembly mounted on the coiling machine frame, the feeding assembly comprises a feeding platform, an upper feeding plate is arranged on the feeding platform, the upper feeding plate is driven by a horizontal cylinder to reciprocate along the horizontal direction, so that the straight plate is moved from the feeding side of the feeding platform to the discharging side of the feeding platform, and an upper pressing plate is arranged at the discharging side of the feeding platform, and a gap is left between the upper pressing plate and the feeding platform for the straight plate to pass through; A coiling assembly mounted on the coiling machine frame, the coiling assembly comprises coiling rollers and a forming baffle, the coiling rollers are two in total and are arranged in an upper-lower position at the discharging side of the feeding platform, are an upper pressing roller located at the upper side and a lower supporting roller located at the lower side, and a gap is left between the upper pressing roller and the lower supporting roller for the straight plate to pass through, and the lower supporting roller is driven to rotate by a motor; The forming baffle is located in the gap between the upper pressing roller and the lower supporting roller, is mounted on the coiling machine frame through a fixing seat, the upper end surface of the forming baffle is in close contact with the bottom end of the upper pressing roller, a gap is left between the lower end surface of the forming baffle and the lower supporting roller for the straight plate to pass through, the forming baffle is driven to approach or move away from the lower supporting roller by an adjusting mechanism, and one side of the forming baffle close to the lower supporting roller is an inclined slope, and the inclination direction of the slope is gradually inclined to the direction close to the lower supporting roller from the side close to the upper pressing roller of the forming baffle.

3. The brake shoe assembly machining method of claim 2, wherein: A pair of upper feeding baffles are further arranged on the feeding platform, the two upper feeding baffles are located on the two sides of the upper feeding plate, and the upper feeding baffles and the feeding platform are fixed through the cooperation of bolts and nuts, a waist-shaped adjusting hole for the bolt to pass through is formed in the upper feeding baffle, and a circular fixing hole for the bolt to pass through is formed in the feeding platform.

4. The brake shoe assembly machining method of claim 2, wherein: The feeding push plate is installed on the feeding platform through a push plate mounting seat, and a guide through hole horizontally movable and capable of accommodating the push plate mounting seat is further formed on the feeding platform, the push plate mounting seat is a reverse T-shaped structure connected by an upper guide plate and a lower limiting plate distributed in an up-down mode, the upper guide plate is arranged in the guide through hole and moves horizontally along the guide through hole, the feeding push plate is vertically connected to the upper guide plate, and the lower limiting plate is driven by a horizontal cylinder installed on the feeding platform to move horizontally and drive the feeding push plate to move horizontally.

5. The brake shoe assembly machining method of claim 2, wherein: The circumferential surface of the lower supporting roller is further provided with a plurality of first recesses in a transverse distribution and a plurality of second recesses in a longitudinal distribution, so that the surface of the lower supporting roller is formed with a plurality of rectangular protrusions, and the rectangular protrusions are arranged in a rectangular array after the lower supporting roller is unfolded.

6. The brake shoe assembly machining method of claim 2, wherein: The adjusting mechanism is that the profiled baffle and the fixing seat are fixed through cooperation of a plurality of adjusting bolts, a plurality of U-shaped through holes corresponding to the adjusting bolts are formed on one side of the profiled baffle away from the lower supporting roller, threaded through holes through which the adjusting bolts pass are formed on the fixing seat, the adjusting bolts are screwed and fixed in the threaded through holes after passing through the U-shaped through holes, the connection between the profiled baffle and the fixing seat is realized, and a plurality of guide shafts are further connected to the side of the profiled baffle away from the lower supporting roller, and guide holes through which the guide shafts pass one by one are further formed on the fixing seat.

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