Brake pad steel backing U-shaped groove punch forming die

Abstract

The invention belongs to the technical field of brake pad steel backing stamping, and provides a brake pad steel backing U-shaped groove stamping forming die which comprises a female die and a male die, a guide assembly is arranged between the female die and the male die, a die cavity is formed in the middle of the female die, and a plurality of positioning mechanisms are arranged on the upper end face of the female die around the die cavity. The positioning mechanism can adjust the position of the steel backing part according to the stretching degree of the steel backing part; a plurality of inner cavities are formed in the female die and surround a die cavity, ports are communicated between the inner cavities and the die cavity, a thrust mechanism is arranged in each inner cavity, and a protection mechanism surrounds the thrust mechanism. According to the device, all first motors drive supporting seats corresponding to all steel coils to move circularly, the steel coils make continuous contact with the surface of the steel backing part to absorb heat, and the steel coils absorb heat on the surface of the steel backing part; in the process, the first rubber strip on the opposite face scrapes off burrs generated by friction on the surface of the steel backing part.

Description

Technical Field

[0001] The invention belongs to the technical field of brake pad steel back stamping, and in particular relates to a brake pad steel back U-shaped groove stamping forming die. Background Art

[0002] The brake pad steel back is an important part of the brake pad, mainly used to fix the friction material and facilitate installation on the brake system. The steel back is made of high-strength material and can withstand the high temperature and pressure during braking, ensuring the effectiveness and safety of the brake system.

[0003] Multi-station progressive dies play a very important role in the processing of metal stamping parts. Multi-station progressive dies are based on the basic requirements of metal stamping parts and integrate basic stamping processes such as stamping, bending, deep stamping, and forming. Metal stamping parts factories can play many advantages when using multi-station progressive dies.

[0004] During stamping, the blanking clearance between the die and the steel back part has a great influence on the forming effect of the U-shaped groove on the steel back of the brake pad. When the blanking clearance is small, the steel back part and the inner wall of the die are prone to friction, causing the steel back part to heat up rapidly, and at the same time, more burrs are generated on the back of the steel back part, and the die will be greatly worn. When the blanking clearance is large, the forming accuracy of the steel back part is poor; and the steel back part is extended under the action of the punching pressure, resulting in a change in the blanking clearance between the die and the steel back part. The blanking clearance of the existing brake pad steel back U-shaped groove stamping die is not easy to adjust. Summary of the invention

[0005] The purpose of the present invention is to provide a U-shaped groove stamping die for a brake pad steel back, aiming to solve the technical problem in the prior art that the blanking gap between a concave die and a convex die is difficult to adjust.

[0006] The present invention is implemented as follows: a brake pad steel back U-shaped groove stamping die comprises a concave die and a convex die, a guide assembly for guiding and buffering the convex die is arranged between the concave die and the convex die, a die cavity is arranged in the middle of the concave die, and a plurality of positioning mechanisms are arranged around the die cavity on the upper end surface of the concave die, and the positioning mechanisms can fix the steel back parts and adjust the position of the steel back parts according to the stretching degree of the steel back parts; A plurality of inner cavities are arranged around the die cavity inside the concave die, and ports are connected between the inner cavities. A thrust mechanism is arranged in each inner cavity, and a protective mechanism is arranged around the outside of the thrust mechanism. The thrust mechanism can push the protective mechanism to limit the steel back part in the die cavity, and the protective mechanism can move vertically with the steel back part, and the protective mechanism can remove burrs on the surface of the steel back part; The thrust mechanism is provided with two sets of lubrication mechanisms, which can jointly lubricate and cool the surface of the protective mechanism. One side of the lubrication mechanism is provided with an oiling component for adding lubricating oil to the surface of the protective mechanism; the thrust mechanism is also fixedly connected with a fixing component, which can keep the protective mechanism and the thrust mechanism fixed, so that the protective mechanism can elastically limit the steel back part; A No. 4 electric push rod is fixedly connected to the middle of the mold cavity, a support plate is fixedly connected to the telescopic end of the No. 4 electric push rod, and a temperature sensor is embedded on the upper end surface of the support plate.

[0007] Further technical solution: the positioning mechanism includes a fixing frame, a No. 1 electric push rod, a pressure seat and a slide plate; The fixing frame is fixedly connected to the upper end surface of the die, one end of the fixing frame is fixedly connected to an electric push rod No. 1, the telescopic end of the electric push rod No. 1 is fixedly connected to a pressure seat, the lower end surface of the pressure seat is slidably connected to a pressure plate, a groove is provided on the die opposite to the pressure seat, a slide is slidably connected in the groove, and a limiting component for limiting the slide is provided in the groove.

[0008] Further technical solution: The limiting assembly includes a No. 2 electric push rod, one end of which is fixedly connected to the inner wall of the groove, and the other end of which is fixedly connected to a movable frame, which is slidably connected to and penetrates the slide board, and a No. 2 spring is sleeved on the movable frame, which elastically abuts against the slide board.

[0009] Further technical solution: the thrust mechanism includes an electric thrust seat, a connecting plate and a support seat; One end of the electric push seat is fixedly connected to the inner end surface of the inner cavity, the telescopic end of the electric push seat is fixedly connected to a connecting plate, the connecting plate is fixedly connected to a support seat, and a pressure sensor is arranged on the surface of the support seat facing the mold cavity.

[0010] Further technical solution: the protection mechanism includes a roller, a No. 1 motor and a steel coil; Rollers are arranged at both ends of the support seat, and the two rollers are rotatably connected to the connecting plate. The connecting plate is fixedly connected to a No. 1 motor, and the output shaft of the No. 1 motor is fixedly connected to one of the rollers, and a steel coil is wound between the two rollers; The steel coil has a front side and an opposite side on both sides of the support seat, and a plurality of No. 1 rubber strips are distributed at intervals on the opposite side.

[0011] Further technical solution: the lubrication mechanism includes a No. 2 motor, a rotating roller and a No. 2 rubber strip; Two rotating seats are fixedly connected to the electric push seat, each of which is fixedly connected to a No. 2 motor, and an output shaft of the No. 2 motor is fixedly connected to a rotating roller, on which a plurality of No. 2 rubber strips are obliquely arranged along the same circumferential direction.

[0012] Further technical solution: the fixing assembly includes a fixing plate, a No. 3 electric push rod and a strip plate; The fixing plate is fixedly connected to the telescopic end of the electric push seat, the fixing plate is fixedly connected to a No. 3 electric push rod, and the telescopic end of the No. 3 electric push rod is fixedly connected to a strip plate.

[0013] Further technical solution: the oiling assembly includes an oil tank, a bottom plate and a No. 3 spring; The oil groove is fixedly connected to the rotating seat, and the oil groove is fixed on the lower side of the rotating roller. A bottom plate is slidably and sealingly connected in the oil groove, and a plurality of No. 3 springs are connected between the bottom plate and the inner end surface of the oil groove.

[0014] Further technical solution: The guide assembly includes a guide rod and a No. 1 spring. The upper end surface of the die is provided with a plurality of slots, each of which is fixedly connected with a guide rod. A No. 1 spring is sleeved on the outer side of the guide rod, and all guide rods slide together with the punch and are connected through it.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the hydraulic mechanism drives the punch to start pressing down, the No. 2 electric push rod pushes the moving frame to compress the No. 2 spring to the limit. At this time, the slide plate is fixed in the groove, so the steel back part extends and stretches into the mold cavity under the action of pressure; when the hydraulic mechanism drives the punch to press down for many times, the steel back part extends and stretches to a certain extent, and the No. 2 electric push rod is started to contract. The No. 2 spring elastically limits the slide plate, so the No. 2 spring can absorb part of the impact force on the steel back part to avoid excessive extension of the steel back part and breakage.

[0016] 2. The protective mechanism is limited by the support seat so that the protective mechanism can rigidly abut the steel back part. At this time, the pressure sensor can sense the rigid pressure between the protective mechanism and the steel back part, thereby starting the electric push seat extension and retraction to achieve pressure adjustment between the protective mechanism and the steel back part.

[0017] 3. When the steel back part begins to extend and stretch into the mold cavity, the opposite side fits with the surface of the steel back part. Driven by the steel back part, the steel coil rotates around two rollers to avoid friction damage to the surface of the steel back part and burrs. When the steel back part extends to a certain extent in the mold cavity, the two rollers drive the steel coil to move so that the opposite side fits with the surface of the steel back part. At this time, the No. 1 rubber strip on the opposite side elastically contacts with the surface of the steel back part, and the fixing assembly is started to fix the steel coil on the surface of the support seat. Multiple No. 1 rubber strips can elastically limit the steel back part in vertical sections, thereby reducing the vertical instantaneous impact pressure on the steel back part.

[0018] 4. When the temperature sensor senses that the temperature of the steel back part is high, the downward stamping of the hydraulic mechanism is stopped, and each No. 1 motor drives the corresponding support seats of all steel coils to circulate. The steel coils are in constant contact with the surface of the steel back parts to absorb heat, and the steel coils absorb the heat from the surface of the steel back parts. In this process, the No. 1 rubber strip on the opposite side scrapes off the burrs on the surface of the steel back parts caused by friction. At the same time, the two No. 2 motors on one side of each support seat are started to rotate in the same speed and in the opposite direction. Therefore, on one side of the steel coil, all the No. 2 rubber strips on one roller apply lubricating oil to the steel coil, and the lubricating oil on the steel coil absorbs heat from the surface of the steel back parts. At the same time, the lubricating oil reduces the friction force when the steel coil and the steel back parts move relative to each other. All the No. 2 rubber strips on the other roller remove and collect the excess lubricating oil after absorbing heat together with the burrs from the steel coil and the No. 1 rubber strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the positioning mechanism in the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the concave mold in the present invention.

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0023] Figure 5 It is a schematic diagram of the structure of the fixing component in the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the thrust mechanism and the protection mechanism in the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of the oiling component in the present invention.

[0026] In the attached drawings: 1. die; 2. punch; 3. guide assembly; 31. guide rod; 32. spring No. 1; 4. positioning mechanism; 41. fixed frame; 42. electric push rod No. 1; 43. press seat; 44. slide plate; 45. limit assembly; 451. electric push rod No. 2; 452. moving frame; 453. spring No. 2; 5. thrust mechanism; 51. electric push seat; 52. connecting plate; 53. support seat; 6. protection mechanism; 61. roller; 62. motor No. 1; 63. steel coil; 631. directly opposite; 632. opposite side; 64. rubber strip No. 1; 7. lubrication mechanism; 71. motor No. 2; 72. roller; 73. rubber strip No. 2; 8. Fixing assembly; 81. Fixing plate; 82. No. 3 electric push rod; 83. Strip plate; 9. Oiling assembly; 91. Oil tank; 92. Bottom plate; 93. No. 3 spring; 10. Inner cavity; 11. No. 4 electric push rod; 12. Support plate; 13. Rotating seat; 14. Groove; 15. Slot; 16. Mold cavity; 17. Port. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] like Figure 1-Figure 7 As shown, a brake pad steel back U-shaped groove stamping die provided by the present invention comprises a die 1 and a punch 2, a guide assembly 3 for guiding and buffering the punch 2 is arranged between the die 1 and the punch 2, a die cavity 16 is arranged in the middle of the die 1, and a plurality of positioning mechanisms 4 are arranged around the die cavity 16 on the upper end surface of the die 1, and the positioning mechanisms 4 can fix the steel back parts and adjust the position of the steel back parts according to the stretching degree of the steel back parts; A plurality of inner cavities 10 are arranged around the die cavity 16 inside the die 1, and ports 17 are connected between the inner cavities 10 and the die cavity 16, and a thrust mechanism 5 is arranged in each inner cavity 10, and a protective mechanism 6 is arranged around the outside of the thrust mechanism 5, and the thrust mechanism 5 can push the protective mechanism 6 to limit the steel back part in the die cavity 16, and the protective mechanism 6 can move vertically with the steel back part, and the protective mechanism 6 can remove burrs on the surface of the steel back part; The thrust mechanism 5 is provided with two sets of lubrication mechanisms 7, which can jointly lubricate and cool the surface of the protection mechanism 6. One side of the lubrication mechanism 7 is provided with an oiling component 9 for adding lubricating oil to the surface of the protection mechanism 6; the thrust mechanism 5 is also fixedly connected with a fixing component 8, which can keep the protection mechanism 6 and the thrust mechanism 5 fixed, so that the protection mechanism 6 can elastically limit the steel back parts; A fourth electric push rod 11 is fixedly connected to the middle of the mold cavity 16 , a support plate 12 is fixedly connected to the telescopic end of the fourth electric push rod 11 , and a temperature sensor is embedded on the upper end surface of the support plate 12 .

[0030] In this embodiment, the punch 2 is fixedly connected to the hydraulic mechanism, and the steel back part is fixed on the upper side of the die cavity 16 through various positioning mechanisms 4, and then the hydraulic mechanism is started to drive the punch 2 to press down. At this time, the guide component 3 guides and buffers the punch 2; in the die cavity 16, the No. 4 electric push rod 11 drives the support plate 12 to gradually lower its height, and the hydraulic mechanism drives the punch 2 to push the steel back part to continuously recess into the die cavity 16 and fit the support plate 12, so that the U-shaped groove on the steel back part is gradually stamped and formed; The steel back part gradually sinks into the mold cavity 16. At this time, all the protective mechanisms 6 inside the mold cavity 16 are in contact with the side wall of the steel back part. All the thrust mechanisms 5 push each protective mechanism 6 to rigidly limit the steel back part, and the thrust mechanism 5 can adjust the extrusion force between the protective mechanism 6 and the steel back part, so as to avoid excessive friction between the protective mechanism 6 and the steel back part to generate burrs, or too little pressure to cause deformation of the side of the steel back part; in this process, the protective mechanism 6 can move vertically with the steel back part, so as to further reduce the friction between the protective mechanism 6 and the steel back part; After the hydraulic mechanism drives the punch 2 to press down for many times, when the temperature sensor senses that the temperature of the steel back part is high, the downward pressing of the hydraulic mechanism is stopped, and the two sets of lubrication mechanisms 7 on each thrust mechanism 5 are started to jointly lubricate and cool the surface of the protection mechanism 6. The protection mechanism 6 lubricates and cools the surface of the steel back part, and at the same time, the protection mechanism 6 can remove burrs on the surface of the steel back part; After multiple downward pressures, when the steel back part is gradually stretched to its limit, the positioning mechanism 4 can adjust the position of the steel back part according to the stretching degree of the steel back part, and the fixing assembly 8 keeps the protection mechanism 6 and the thrust mechanism 5 fixed, so that the protection mechanism 6 elastically limits the steel back part and increases the buffering force when the steel back part is stretched.

[0031] like Figure 2 As shown, a brake pad steel back U-shaped groove stamping forming die provided by the present invention, the positioning mechanism 4 includes a fixing frame 41, a No. 1 electric push rod 42, a pressing seat 43 and a sliding plate 44; The fixing frame 41 is fixedly connected to the upper end surface of the die 1, one end of the fixing frame 41 is fixedly connected to an electric push rod 42, the telescopic end of the electric push rod 42 is fixedly connected to a pressure seat 43, the lower end surface of the pressure seat 43 is slidably connected to a pressure plate, a groove 14 is provided on the die 1 at a position opposite to the pressure seat 43, a slide plate 44 is slidably connected in the groove 14, and a limiting component 45 for limiting the slide plate 44 is provided in the groove 14.

[0032] In this embodiment, each No. 1 electric push rod 42 is started, and the No. 1 electric push rod 42 drives the pressure seat 43 connected to it to move downward, and the pressure seat 43 drives the pressure plate connected to it to press down the steel back part, and the steel back part is fixed on the upper side of the mold cavity 16 under the clamping force of multiple pressure plates and the slide plate 44.

[0033] like Figure 4 As shown, a brake pad steel back U-shaped groove stamping forming die provided by the present invention, the limiting component 45 includes a No. 2 electric push rod 451, one end of the No. 2 electric push rod 451 is fixedly connected to the inner wall of the groove 14, and the other end of the No. 2 electric push rod 451 is fixedly connected to a moving frame 452, the moving frame 452 is slidably and penetratedly connected with the slide plate 44, and a No. 2 spring 453 is sleeved on the moving frame 452, and the No. 2 spring 453 is elastically abutted against the slide plate 44.

[0034] In this embodiment, when the hydraulic mechanism drives the punch 2 to start pressing down, the No. 2 electric push rod 451 pushes the movable frame 452 to compress the No. 2 spring 453 to the limit. At this time, the slide plate 44 is fixed in the groove 14, so the steel back part is extended and stretched into the mold cavity 16 under the action of pressure; when the hydraulic mechanism drives the punch 2 to press down for many times, the steel back part is extended and stretched to a certain extent. At this time, the No. 2 electric push rod 451 is started to contract, and the No. 2 spring 453 elastically limits the slide plate 44, so the No. 2 spring 453 can absorb part of the impact force on the steel back part to avoid excessive extension of the steel back part and breakage.

[0035] like Figure 6 As shown, it is a brake pad steel back U-shaped groove stamping forming die provided by the present invention, and the thrust mechanism 5 includes an electric thrust seat 51, a connecting plate 52 and a support seat 53; One end of the electric push seat 51 is fixedly connected to the inner end surface of the inner cavity 10 , the telescopic end of the electric push seat 51 is fixedly connected to a connecting plate 52 , the connecting plate 52 is fixedly connected to a supporting seat 53 , and a pressure sensor is provided on the surface of the supporting seat 53 facing the mold cavity 16 .

[0036] In this embodiment, the protective mechanism 6 is limited by the support seat 53, so that the protective mechanism 6 can rigidly abut the steel back part. At this time, the pressure sensor can sense the rigid pressure between the protective mechanism 6 and the steel back part, thereby starting the electric push seat 51 to retract and retract, thereby realizing the pressure adjustment between the protective mechanism 6 and the steel back part.

[0037] like Figure 6 and Figure 7 As shown, a brake pad steel back U-shaped groove stamping die provided by the present invention, the protection mechanism 6 includes a roller 61, a first motor 62 and a steel coil 63; Rollers 61 are provided at both ends of the support seat 53. The two rollers 61 are rotatably connected to the connecting plate 52. The connecting plate 52 is fixedly connected to a No. 1 motor 62. The output shaft of the No. 1 motor 62 is fixedly connected to one of the rollers 61. A steel coil 63 is wound between the two rollers 61. The steel coil 63 has two opposite sides, namely a front side 631 and an opposite side 632 , on the opposite side 632 . A plurality of first rubber strips 64 are spaced apart from each other.

[0038] In this embodiment, when the steel back part begins to extend and stretch into the mold cavity 16, the opposite surface 631 fits with the surface of the steel back part, and driven by the steel back part, the steel coil 63 rotates around the two rollers 61, thereby preventing the surface of the steel back part from being damaged by friction and generating burrs; When the steel back part is extended to a certain extent in the mold cavity 16, the No. 1 motor 62 is started to drive the roller 61 connected to it to rotate, and the two rollers 61 drive the steel coil 63 to move, so that the opposing surface 632 is in contact with the surface of the steel back part. At this time, the No. 1 rubber strip 64 on the opposing surface 632 elastically abuts against the surface of the steel back part, and the fixing component 8 is started to fix the steel coil 63 on the surface of the support seat 53. The steel back part can be elastically limited in vertical sections through multiple No. 1 rubber strips 64, thereby reducing the vertical instantaneous impact pressure on the steel back part.

[0039] like Figure 7 As shown, a brake pad steel back U-shaped groove stamping forming die provided by the present invention, the lubrication mechanism 7 includes a second motor 71, a rotating roller 72 and a second rubber strip 73; The electric push seat 51 is fixedly connected to two rotating seats 13, each of which is fixedly connected to a No. 2 motor 71, and an output shaft of the No. 2 motor 71 is fixedly connected to a rotating roller 72, and a plurality of No. 2 rubber strips 73 are obliquely arranged on the rotating roller 72 along the same circumferential direction.

[0040] In this embodiment, after the hydraulic mechanism drives the punch 2 to press down for many times, when the temperature sensor senses that the temperature of the steel back part is high, the downward pressing of the hydraulic mechanism is stopped, and all No. 1 motors 62 are started. Each No. 1 motor 62 drives all the steel coils 63 to circulate around the corresponding support seat 53. The steel coils 63 are in continuous contact with the surface of the steel back part to absorb heat, and the steel coils 63 absorb the heat from the surface of the steel back part. In this process, the No. 1 rubber strip 64 on the opposite side 632 scrapes off the burrs on the surface of the steel back part caused by friction. At the same time, the two No. 2 motors 71 on one side of each support seat 53 are started to rotate at the same speed and in the opposite direction. Therefore, on one side of the steel coil 63, all the No. 2 rubber strips 73 on one roller 72 apply lubricating oil to the steel coil 63, and the lubricating oil on the steel coil 63 absorbs heat from the surface of the steel back parts. At the same time, the lubricating oil reduces the friction force when the steel coil 63 and the steel back parts move relative to each other. All the No. 2 rubber strips 73 on the other roller 72 remove and collect the excess lubricating oil after absorbing heat together with the burrs from the steel coil 63 and the No. 1 rubber strips 64; with the cooperation of all the protective mechanisms 6 and the lubricating mechanisms 7, the cooling of the steel back parts and the cleaning of the surface burrs are achieved.

[0041] like Figure 5 As shown, a brake pad steel back U-shaped groove stamping mold provided by the present invention, the fixing assembly 8 includes a fixing plate 81, a third electric push rod 82 and a strip plate 83; The fixing plate 81 is fixedly connected to the telescopic end of the electric push seat 51 , a third electric push rod 82 is fixedly connected to the fixing plate 81 , and a strip plate 83 is fixedly connected to the telescopic end of the third electric push rod 82 .

[0042] In this embodiment, the third electric push rod 82 is started, and the third electric push rod 82 drives the strip plate 83 to squeeze the steel coil 63, so that the steel coil 63 is attached to and fixed to the support seat 53.

[0043] like Figure 7 As shown, a brake pad steel back U-shaped groove stamping forming die provided by the present invention, the oiling assembly 9 includes an oil groove 91, a bottom plate 92 and a third spring 93; The oil groove 91 is fixedly connected to the rotating seat 13 and fixed to the lower side of the roller 72 . A bottom plate 92 is slidably and sealingly connected in the oil groove 91 . A plurality of No. 3 springs 93 are connected between the bottom plate 92 and the inner end surface of the oil groove 91 .

[0044] In this embodiment, the oil groove 91 stores the lubricating oil, and in the oil groove 91, when the lubricating oil decreases, the No. 3 spring 93 can push the bottom plate 92 upward, thereby raising the height of the lubricating oil in the oil groove 91, so that the lubricating oil in the oil groove 91 always keeps in contact with the No. 2 rubber strip 73.

[0045] like Figure 1 As shown, a brake pad steel back U-groove stamping mold provided by the present invention is provided. The guide assembly 3 includes a guide rod 31 and a No. 1 spring 32. The upper end surface of the die 1 is provided with a plurality of slots 15. The slots 15 are all fixedly connected with guide rods 31. The outer side of the guide rods 31 is sleeved with a No. 1 spring 32. All guide rods 31 slide together with the punch 2 and are connected through it.

[0046] In this embodiment, the punch 2 is guided by the guide rod 31 , and the No. 1 spring 32 elastically buffers the punch 2 .

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A brake pad steel back U-shaped groove stamping die, comprising a concave die (1) and a convex die (2), characterized in that: A mold cavity (16) is provided in the middle of the die (1), and a plurality of positioning mechanisms (4) are provided on the upper end surface of the die (1) around the mold cavity (16), wherein the positioning mechanisms (4) can fix the steel back part and adjust the position of the steel back part according to the stretching degree of the steel back part; A plurality of inner cavities (10) are arranged around the die cavity (16) inside the die (1), and a port (17) is provided between the inner cavities (10) and the die cavity (16), and a thrust mechanism (5) is arranged in each inner cavity (10), and a protective mechanism (6) is arranged around the outside of the thrust mechanism (5), and the thrust mechanism (5) can push the protective mechanism (6) to limit the steel back part in the die cavity (16), and the protective mechanism (6) can move vertically with the steel back part; The thrust mechanism (5) is provided with two sets of lubricating mechanisms (7), which can jointly lubricate and cool the surface of the protective mechanism (6); one side of the lubricating mechanism (7) is provided with an oiling component (9) for adding lubricating oil to the surface of the protective mechanism (6); the thrust mechanism (5) is also fixedly connected with a fixing component (8), and the fixing component (8) can keep the protective mechanism (6) and the thrust mechanism (5) fixed; A No. 4 electric push rod (11) is fixedly connected to the middle of the mold cavity (16), a support plate (12) is fixedly connected to the telescopic end of the No. 4 electric push rod (11), and a temperature sensor is embedded on the upper end surface of the support plate (12).

2. The brake pad steel back U-shaped groove stamping die according to claim 1, characterized in that: The positioning mechanism (4) comprises a fixing frame (41), a No. 1 electric push rod (42), a pressure seat (43) and a slide plate (44); The fixing frame (41) is fixedly connected to the upper end surface of the die (1); one end of the fixing frame (41) is fixedly connected to a No. 1 electric push rod (42); the telescopic end of the No. 1 electric push rod (42) is fixedly connected to a pressure seat (43); the lower end surface of the pressure seat (43) is slidably connected to a pressure plate; a groove (14) is provided on the die (1) at a position opposite to the pressure seat (43); a slide plate (44) is slidably connected in the groove (14); and a limit assembly (45) for limiting the slide plate (44) is provided in the groove (14).

3. The U-shaped groove stamping die for the brake pad steel back according to claim 2, characterized in that: The limiting assembly (45) comprises a No. 2 electric push rod (451), one end of the No. 2 electric push rod (451) is fixedly connected to the inner wall of the groove (14), the other end of the No. 2 electric push rod (451) is fixedly connected to a moving frame (452), the moving frame (452) is slidably connected to and penetrates the slide plate (44), and a No. 2 spring (453) is sleeved on the moving frame (452), and the No. 2 spring (453) is elastically abutted against the slide plate (44).

4. The brake pad steel back U-shaped groove stamping die according to claim 1, characterized in that: The thrust mechanism (5) comprises an electric thrust seat (51), a connecting plate (52) and a support seat (53); One end of the electric push seat (51) is fixedly connected to the inner end surface of the inner cavity (10), the telescopic end of the electric push seat (51) is fixedly connected to a connecting plate (52), the connecting plate (52) is fixedly connected to a supporting seat (53), and a pressure sensor is provided on the surface of the supporting seat (53) facing the mold cavity (16).

5. The brake pad steel back U-shaped groove stamping die according to claim 4, characterized in that: The protection mechanism (6) comprises a roller (61), a first motor (62) and a steel coil (63); Rollers (61) are provided at both ends of the support seat (53), the two rollers (61) are rotatably connected to the connecting plate (52), the connecting plate (52) is fixedly connected to a first motor (62), the output shaft of the first motor (62) is fixedly connected to one of the rollers (61), and a steel coil (63) is wound between the two rollers (61); The steel coil (63) comprises a directly opposite side (631) and an opposite side (632) on both sides of the support seat (53), and a plurality of No. 1 rubber strips (64) are distributed at intervals on the opposite side (632).

6. The U-shaped groove stamping die for the brake pad steel back according to claim 4, characterized in that: The lubrication mechanism (7) comprises a second motor (71), a rotating roller (72) and a second rubber strip (73); Two rotating seats (13) are fixedly connected to the electric push seat (51), each of the rotating seats (13) is fixedly connected to a No. 2 motor (71), an output shaft of the No. 2 motor (71) is fixedly connected to a rotating roller (72), and a plurality of No. 2 rubber strips (73) are obliquely arranged on the rotating roller (72) along the same circumferential direction.

7. The brake pad steel back U-shaped groove stamping die according to claim 1, characterized in that: The fixing assembly (8) comprises a fixing plate (81), a third electric push rod (82) and a strip plate (83); The fixed plate (81) is fixedly connected to the telescopic end of the electric push seat (51), the fixed plate (81) is fixedly connected to a third electric push rod (82), and the telescopic end of the third electric push rod (82) is fixedly connected to a strip plate (83).

8. The brake pad steel back U-shaped groove stamping die according to claim 6, characterized in that: The oiling assembly (9) comprises an oil tank (91), a bottom plate (92) and a third spring (93); The oil groove (91) is fixedly connected to the rotating seat (13), and the oil groove (91) is fixed to the lower side of the rotating roller (72). A bottom plate (92) is slidably and sealingly connected in the oil groove (91), and a plurality of No. 3 springs (93) are connected between the bottom plate (92) and the inner end surface of the oil groove (91).

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