Drum brake pad stamping equipment

Abstract

The invention relates to drum brake pad stamping machining equipment, and belongs to the technical field of drum brake pad machining equipment. The punching machine comprises a rack, die pressing assemblies and punches capable of moving up and down are arranged on the rack, a rotary disc is further arranged on the rack, a feeding station, a punching station, a pressure maintaining station and a discharging station are arranged on the periphery of the rotary disc, the punches are located at the punching station, and the four die pressing assemblies are evenly arranged on the rotary disc. Each mold pressing assembly comprises a bottom mold, a top mold, a fixing shaft and a top rod, a torsional spring is connected between the top rod and the fixing shaft, an insertion block capable of elastically moving is arranged at the bottom end of the top rod, an insertion groove with an upward opening is formed in the top mold, and the rotating disc can sequentially rotate by a set angle so as to drive all the mold pressing assemblies to sequentially rotate to all the stations; when the die pressing assembly rotates to the stamping station, the punch pushes the ejector die to move downwards for stamping and pushes the ejector rod to swing downwards. The stamping process and the pressure maintaining process can be carried out in different spaces, and the production efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of drum brake pad processing equipment, in particular to a drum brake pad stamping processing equipment. Background Art

[0002] Drum brake pads are key components in the automotive braking system, used to provide friction when the vehicle slows down or stops. Drum brake pads are usually composed of friction materials and metal backing plates. Friction materials are usually a mixture of various organic and inorganic components, including fibers, fillers, adhesives and other additives. In the process of processing friction materials, the selected raw materials need to be mixed evenly in proportion, and then the mixed friction materials are pre-pressed into the desired shape using a mold. After that, the pressed friction materials need to be kept under pressure for a certain period of time to ensure that the formed friction materials have better quality and performance.

[0003] The stamping mechanism in the prior art generally uses the power element in the stamping equipment to keep the upper die on the workpiece for a period of time to maintain the pressure of the workpiece after the stamping is completed. For example, the patent with the authorization announcement number CN217251935U discloses a shield stamping forming mold, which includes a die, a punch, an upper die seat, a first lower die, a second lower die, a baffle plate, a discharge plate and a lower die seat. When using the mold for stamping, the blank is heated to the required temperature and then placed on the upper surface of the die. The blank is positioned by the baffle plate. The press spindle is rotated by the machine tool clutch switch to drive the slider to drive the upper die part of the mold downward. The blank is pressed and formed under the action of the punch and the die, and the pressure needs to be maintained for a period of time after forming.

[0004] The device clamps the blank through the punch and the die to maintain the pressure. During the pressure-maintaining period, the power element and the entire set of molds are occupied by the pressure-maintaining process, and new blanks cannot be stamped. If batch processing is carried out, the pressure-maintaining process will take a lot of time and the production efficiency will be slow. Summary of the invention

[0005] The present invention provides a drum brake pad stamping processing equipment to solve the technical problem that when the drum brake pads are batch processed by the stamping equipment in the prior art, it is necessary to use a power element to tighten the mold to maintain the pressure of the product, resulting in the power element and the mold being occupied by the pressure maintaining process for too long, thus affecting the production efficiency.

[0006] In order to solve the above problems, the present invention provides a drum brake pad stamping processing equipment adopting the following technical solutions: A drum brake pad stamping processing equipment comprises a frame, a die pressing assembly and a punch that can move up and down are arranged on the frame, a turntable that is horizontally arranged and can rotate around an axis extending vertically is also arranged on the frame, a loading station, a stamping station, a pressure holding station and a discharge station are arranged sequentially and evenly on the outer circumference of the turntable, and the punch is located at the stamping station; The die pressing assembly is provided with four groups and is evenly arranged on the turntable along the circumference of the turntable. The die pressing assembly includes a bottom die fixed on the turntable, a top die elastically movable up and down and arranged above the bottom die, a fixed shaft fixed on the turntable and located above the top die, and a top rod rotatably mounted on the fixed shaft. A torsion spring is connected between the top rod and the fixed shaft to keep the top rod in an inclined state. An insert block that can elastically move along the rod length direction of the top rod is provided at the bottom end of the top rod, and a slot with an opening facing upward is provided on the top die. The turntable can rotate the set angle in sequence to drive each molding component to rotate to each station in sequence. When the molding component rotates to the stamping station, the punch pushes the top mold to move downward for stamping, and pushes the ejector rod to swing downward. When the top mold moves to the bottom limit position, the ejector rod swings to a vertical state, and the insert block is inserted into the slot when the ejector rod swings to a vertical state.

[0007] By adopting the above technical scheme, during the downward movement of the punch, it can not only drive the top die to move toward the bottom die, but also drive the push rod to swing toward a vertical state. When the top die moves downward to the bottom limit position, the push rod swings to a vertical state and the plug block at the bottom end of the push rod is inserted into the slot, so that the push rod is locked in a vertical state. The top die is pushed by the push rod and can remain at the bottom limit position after being separated from the punch. In this way, after the punch leaves the top die, the top die can still be pressed on the workpiece to maintain the pressure of the workpiece. Therefore, the molding assembly can be rotated to the pressure holding station for pressure holding. During the pressure holding process, another group of molding assemblies is rotated to the stamping station for stamping. The stamping process and the pressure holding process are independent of each other in space. While one workpiece is being stamped, the other workpiece is being pressure held. In this way, in the mass production process, the processing time can be greatly shortened and the production efficiency can be effectively improved.

[0008] Furthermore, the punch includes a pressure column and a pressure plate vertically connected to the pressure column, the bottom end of the pressure column is located below the pressure plate, and when the punch moves downward, the pressure column pushes the top die to move downward, and the pressure plate pushes the ejector rod to swing downward.

[0009] Furthermore, a feeding mechanism is provided on the frame, which is located at the feeding station. The feeding mechanism includes a feeding box which can move radially along the turntable. The feeding box includes a feeding frame which is closed on all sides and penetrates from top to bottom, and a sealing member for sealing the bottom of the feeding frame. The sealing member and the feeding frame can move relative to each other when the feeding box moves to above the bottom mold, so as to open the bottom of the feeding box and allow the material in the feeding box to fall onto the bottom mold.

[0010] By adopting the above technical solution, the loading box includes a loading frame and a blocking piece that can move relative to the loading frame. When the loading box moves to above the bottom mold, the blocking piece is separated from the loading frame, and the bottom end of the loading frame is opened. The material falls toward the bottom mold under its own weight. The loading box does not need to be turned over to pour out the material inside, and the loading process will be simpler.

[0011] Furthermore, the feeding frame and the sealing member can slide relative to each other in the radial direction of the turntable, and an elastic member that can expand and contract in the radial direction of the turntable is connected between the two. The elastic member keeps the sealing member in a state relative to the feeding frame in the upper and lower directions. The feeding mechanism also includes a baffle installed on the frame, and the baffle and the sealing member block each other in the radial direction of the turntable. When the feeding box moves to the set position above the bottom mold, the sealing member is blocked by the baffle and staggered with the feeding frame, so that the material in the feeding box falls onto the bottom mold.

[0012] By adopting the above technical solution, before the loading box moves to the top of the bottom mold, the loading frame and the blocking piece keep moving synchronously, so that the bottom of the loading frame is always blocked by the blocking piece to prevent the material from falling. When the loading box moves to the top of the bottom mold, the blocking piece is blocked by the baffle and no longer moves forward. The loading frame continues to move forward, and the bottom end of the loading frame is opened. The loading frame pushes the material on the blocking piece forward, so that the material falls into the groove on the bottom mold to achieve loading. Only by using the baffle to block the blocking piece, the loading frame and the blocking piece are staggered to achieve loading, and the structure is simple and ingenious.

[0013] Furthermore, a reset mechanism is provided on the frame, which is located at the discharging station. The reset mechanism includes a top block and a reset push rod. The top block is movably installed on the top mold and is located below the insert block inserted into the slot. The reset push rod is movably installed on the frame. The reset push rod is transmission-connected to the top block. The reset push rod can move toward the turntable to drive the top block to move upward, so that the top block pushes the insert block out of the slot.

[0014] By adopting the above technical solution, the reset push rod drives the top block to move upward during the process of moving toward the turntable, so that the top block pushes the insert block out of the slot. Then, the push rod swings upward and resets under the action of the torsion spring. The push rod is no longer pressed between the fixed shaft and the top mold. The top mold elastically resets upward to expose the workpiece on the bottom mold. The reset method is simple. After resetting, it is convenient to remove the workpiece and also convenient to rotate to the loading station for processing the next brake pad.

[0015] Furthermore, the top block is a vertically extending screw, which is installed in the top mold to prevent rotation. A gear is spirally mounted on the outer side of the screw, and the gear is fixed in the upper and lower positions on the top mold. A rack that can elastically slide in the horizontal direction is provided in the top mold, and the rack is meshed with the gear. The reset push rod can push the rack to slide during the movement toward the turntable to drive the gear to rotate, thereby driving the screw to move upward to push the plug out of the slot.

[0016] By adopting the above technical solution, the reset push rod is connected to the top block through the rack and gear to drive the top block to move up and down. The transmission structure is simple and easy to arrange.

[0017] Furthermore, the bottom mold is provided with a stamping channel running through from top to bottom and a discharging channel extending radially along the turntable. The discharging channel is closed at one end close to the center of the turntable and open at the other end. The discharging channel is located at the bottom of the stamping channel and is connected to the stamping channel. A support block is slidably installed in the discharging channel. An elastic member 2 is connected between the support block and the bottom mold. The elastic member 2 applies an elastic force to the support block facing away from the center of the turntable, so that the support block remains in a state of blocking the bottom end of the stamping channel. The bottom end of the stamping channel is blocked by the support block to form a stamping chamber.

[0018] By adopting the above technical solution, the support block blocks the bottom end of the stamping channel to form a stamping chamber, and the support block can slide in the discharge channel. After the workpiece is processed, the support block slides along the discharge channel to the side of the stamping channel, and the workpiece can move downward into the discharge channel. After that, the support block is elastically reset under the action of the elastic member 2, and the workpiece that falls into the discharge channel can be pushed out of the discharge channel to facilitate discharge.

[0019] Furthermore, a discharging mechanism is provided on the frame, the discharging mechanism is located at the discharging station, the discharging mechanism comprises a blowing pipe and a discharging push rod, the blowing pipe is movably installed on the frame along the radial direction of the turntable, and the air outlet end of the blowing pipe lags behind the end of the reset push rod close to the turntable in the horizontal direction, so that the air outlet end of the blowing pipe can be inserted between the top mold and the bottom mold after the top mold is reset upward; The discharging push rod and the support block block each other in the radial direction of the turntable, and the end of the discharging push rod close to the turntable leads the air outlet end of the blowing duct in the horizontal direction, so that the discharging push rod can push the support block away before the air outlet end of the blowing duct moves to above the stamping chamber, and the air outlet end of the blowing duct can blow air downward to blow the brake pad stuck in the stamping channel into the discharging channel, and the discharging push rod moves back to the turntable after the brake pad enters the discharging channel to allow the support block to elastically reset and push the center of gravity of the brake pad to the outside of the turntable.

[0020] By adopting the above technical scheme, the reset push rod drives the ejector block to move upward to reset the ejector rod and the ejector die, and after the discharge push rod pushes the support block to the side of the stamping channel, the blowing duct is inserted between the top die and the bottom die, and the air outlet end of the blowing duct blows air downward to blow the workpiece into the discharge channel. Then the discharge push rod withdraws, the support block elastically resets, and the support block pushes the workpiece in the discharge channel to realize discharge. The discharge process is more automated and the discharge efficiency is high.

[0021] The drum brake pad stamping processing equipment provided by the present invention has the following beneficial effects: after the stamping is completed, the push rod can keep the top die at the bottom limit position, so that the top die can still press the workpiece after it is separated from the punch, so that the workpiece is in a pressure-maintaining state, the stamping process and the pressure-maintaining process can be performed at different positions, and in the batch processing process, one part can be stamped while another part is being pressure-maintained, and there is no need to wait in vain and waste time during the stamping process, which effectively improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 A three-dimensional structural schematic diagram of a drum brake pad stamping processing equipment provided by the present invention; Figure 2 A three-dimensional structural schematic diagram of a turntable and a mold pressing component in a drum brake pad stamping processing equipment provided by the present invention; Figure 3 A schematic diagram of the three-dimensional structure of a molded component in a drum brake pad stamping processing equipment provided by the present invention; Figure 4 A schematic diagram of the structure of a drum brake pad stamping processing equipment provided by the present invention during loading; Figure 5 A schematic diagram of the structure of a drum brake pad stamping processing equipment provided by the present invention during resetting and discharging; Figure 6 A three-dimensional cross-sectional view of a molded component in a drum brake pad stamping processing equipment provided by the present invention; Figure 7 A schematic diagram of the structure of a bottom die in a drum brake pad stamping processing equipment provided by the present invention, viewed from an upward angle; Figure 8 A schematic diagram of the structure of a bottom die and a support block in a drum brake pad stamping processing equipment provided by the present invention from an upward perspective; Fig. 9 A schematic structural diagram of a bottom die and a support block in a drum brake pad stamping processing equipment provided by the present invention from a top view.

[0023] Description of reference numerals: 1. Frame; 101. Working platform; 102. Operation box; 2. Press column; 3. Press plate; 4. Turntable; 5. Top die; 501. Slot; 6. Bottom die; 601. Punching channel; 602. Discharging channel; 603. Punching chamber; 7. Connecting plate 2; 8. Connecting plate 1; 9. Vertical guide rod; 10. Fixed shaft; 11. Push rod; 12. Insert block; 13. Roller; 14. Elastic member 3; 15. Support plate; 16. Loading frame; 17. Blocking member; 171. Bottom plate; 172. Vertical plate; 1 8. Baffle; 19. Feeding drive; 20. Servo motor; 21. Connecting plate one guide rod; 22. Reset drive; 23. Reset push rod; 24. Movable block; 25. Movable block guide rod; 26. Elastic part five; 27. Discharge push rod; 28. Blowing duct; 29. ​​Rack; 30. Gear; 31. Top block; 32. Support block; 33. Elastic part two; 34. Horizontal guide rod; 35. Elastic part one; 36. Scraper; 37. Sealing part guide rod; 38. Elastic part six; 39. Support platform. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] The following is one embodiment of a drum brake pad stamping processing equipment provided by the present invention: like Figure 1-Figure 9 As shown, a drum brake pad stamping processing equipment includes a frame 1, a turntable 4, a molding component, a feeding mechanism, a punch, a reset mechanism and a discharge mechanism.

[0026] like Figure 1 As shown, the frame 1 is arranged on a horizontal ground, a working platform 101 is provided on the frame 1, an operating box 102 is provided below the working platform 101, and a servo motor 20 is provided in the operating box 102.

[0027] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the turntable 4 is arranged horizontally, and the turntable 4 is rotatably mounted on the working platform 101 on the frame 1 around a vertically extending rotation axis. The loading station, the stamping station, the pressure holding station and the discharge station are evenly and sequentially arranged on the circumference of the turntable 4. The servo motor 20 is connected to the turntable 4 in a transmission manner, and is used to drive the turntable 4 to rotate 90 degrees in sequence to switch between the stations.

[0028] like Figure 2 As shown, there are four groups of mold pressing assemblies, and the four groups of mold pressing assemblies are evenly arranged on the turntable 4 along the circumference of the turntable 4. Figure 3 As shown, the molding assembly includes a bottom mold 6, a vertical guide rod 9, a top mold 5, a fixed shaft 10 and a top rod 11.

[0029] The bottom mold 6 is fixedly mounted on the turntable 4. Figure 3 , Figure 7 As shown, the bottom mold 6 is provided with a punching channel 601 running through from top to bottom and a discharge channel 602 extending radially along the turntable 4. The discharge channel 602 is closed at one end near the center of the turntable 4 and open at the other end. The discharge channel 602 is located at the bottom end of the punching channel 601 and communicates with the punching channel 601.

[0030] like Figure 8 , Fig. 9 As shown, a support block 32 adapted to the discharge channel 602 is slidably installed in the discharge channel 602, the top surface of the support block 32 is arc-shaped, and one end of the support block 32 close to the center of the turntable 4 is connected to a horizontal guide rod 34 extending along the radial direction of the turntable 4, and the horizontal guide rod 34 is slidably penetrated on the bottom mold 6 along the radial direction of the turntable 4. An elastic member 2 33 is connected between the support block 32 and the bottom mold 6, and the elastic member 2 33 is a compression spring that can be extended and retracted along the radial direction of the turntable 4, and the elastic member 2 33 is sleeved on the outside of the horizontal guide rod 34. The elastic member 2 33 applies an elastic force to the support block 32 that is back to the center of the turntable 4, so that the support block 32 is blocked at the bottom of the stamping channel 601 in a natural state, so that the space above the support block 32 in the stamping channel 601 forms a stamping chamber 603.

[0031] like Figure 3 As shown, there are four vertical guide rods 9 , which are respectively arranged at four corners of the bottom mold 6 , and the four vertical guide rods 9 are all fixedly connected to the bottom mold 6 , so that the vertical guide rods 9 and the turntable 4 are relatively fixed.

[0032] The top mold 5 is located above the bottom mold 6. The top mold 5 can slide up and down on the four vertical guide rods 9. An elastic member 3 14 is connected between the top mold 5 and the bottom mold 6. The elastic member 3 14 is a compression spring that can be retracted vertically. The elastic member 3 14 is sleeved on the outer side of the vertical guide rod 9. Four slots 501 with openings facing upward are provided on the top surface of the top mold 5. The four slots 501 are distributed in a square shape.

[0033] Two fixed shafts 10 are provided, and each fixed shaft 10 is connected between the top ends of two vertical guide rods 9 located on the same side of the discharge channel 602 .

[0034] There are four push rods 11, and two push rods 11 are rotatably mounted on each fixed shaft 10. The top end of the push rod 11 is rotatably mounted on the fixed shaft 10, and a torsion spring is connected between the push rod 11 and the fixed shaft 10. When the torsion spring is not subjected to external force, the push rod 11 remains in an inclined state, and the push rods 11 arranged on the two fixed shafts 10 are symmetrical and approach each other from top to bottom. The four connection positions between the four push rods 11 and the fixed shaft 10 are respectively opposite to the above-mentioned four slots 501 up and down.

[0035] The bottom end of the top rod 11 is arc-shaped, and an insert block 12 is provided at the bottom end of the top rod 11, and a roller 13 is rotatably installed at the bottom of the insert block 12. The insert block 12 is slidably installed on the top rod 11 along the rod length direction of the top rod 11, and an elastic member 4 is connected between the insert block 12 and the top rod 11. The elastic member 4 is a compression spring that can be extended and retracted along the rod length direction of the top rod 11. The elastic member 4 applies an elastic force to the insert block 12 that is back to the top rod 11, so that the insert block 12 extends to the outside of the top rod 11. When the top mold 5 moves downward to the bottom limit position, the top rod 11 can be just vertically stuck between the fixed shaft 10 and the top mold 5.

[0036] like Figure 4 As shown, the feeding mechanism is installed on the frame 1 and is located at the feeding station. The feeding mechanism includes a feeding drive member 19, a connecting plate 8, a support plate 15, a feeding box, an elastic member 35 and a baffle 18.

[0037] The feeding drive member 19 is a feeding cylinder, which is mounted on the frame 1 and located below the turntable 4 , and the output end of the feeding cylinder can reciprocate along the radial direction of the turntable 4 .

[0038] The connecting plate 8 is located outside the turntable 4, and the connecting plate 8 is vertically connected to the output end of the feeding cylinder. The connecting plate 8 is vertically connected to a connecting plate guide rod 21, and the connecting plate guide rod 21 is inserted on the frame 1 in a sliding direction in the horizontal direction.

[0039] The support plate 15 is vertically connected to the top of the connecting plate 8 and is located on the side of the connecting plate 8 facing the turntable 4. The support plate 15 is provided with a square through hole running through from top to bottom, and a scraper 36 is vertically connected to one end of the support plate 15 facing away from the connecting plate 8.

[0040] The loading box includes a loading frame 16 and a blocking member 17. The loading frame 16 is a square frame structure with four sides closed. The loading frame 16 is connected to the support plate 15 and is opposite to the above-mentioned square through hole in the upper and lower sides.

[0041] The blocking member 17 is located on the side of the connecting plate 18 facing the turntable 4. The blocking member 17 is an L-shaped plate structure. The blocking member 17 includes a bottom plate 171 arranged horizontally and attached to the bottom surface of the support plate 15 and a vertical plate 172 vertically connected to the end of the bottom plate 171 facing away from the turntable 4. The end of the vertical plate 172 facing away from the bottom plate 171 is connected to a blocking member guide rod 37 extending in the radial direction of the turntable 4, and the blocking member guide rod 37 is slidably arranged on the connecting plate 18.

[0042] The elastic member 35 is connected between the vertical plate 172 and the connecting plate 8. The elastic member 35 is a compression spring that can be extended and retracted along the radial direction of the turntable 4. The elastic member 35 is sleeved on the outer side of the blocking member guide rod 37.

[0043] The baffle 18 is connected to the frame 1 . The baffle 18 is arranged vertically. The baffle 18 and the vertical plate 172 block each other in the radial direction of the turntable 4 . The baffle 18 is located on a side of the vertical plate 172 facing the turntable 4 .

[0044] The feeding drive member 19 can drive the connecting plate 8 to move toward the turntable 4, so as to drive the supporting plate 15 and the feeding frame 16 to move toward the turntable 4. The connecting plate 8 drives the blocking member 17 to move synchronously with the feeding frame 16 toward the turntable 4 through the elastic member 35. When the end of the bottom plate 171 of the blocking member 17 close to the turntable 4 moves to above the stamping chamber 603, the vertical plate 172 is stopped by the baffle 18, and the blocking member 17 no longer moves synchronously with the feeding frame 16. The feeding frame 16 continues to move toward the center of the turntable 4. The bottom end of the feeding frame 16 is no longer blocked by the blocking member 17, and the material in the feeding frame 16 falls into the stamping chamber 603 to realize feeding.

[0045] like Figure 1 As shown, the punch is located at the stamping station, and the punch includes a pressure column 2 and a pressing plate 3 vertically connected to the pressure column 2. The bottom end of the pressure column 2 is located below the pressing plate 3. The pressure column 2 is vertically opposite to the middle of the top die 5 in the die pressing assembly rotated to the stamping station. The spacing dimension of the two ejector rods 11 arranged on the two fixed shafts 10 when swinging to the vertical state is equal to the width dimension of the pressing plate 3. A lifting cylinder is provided on the frame 1, and the pressure column 2 is connected to the driving output end of the lifting cylinder. The pressure column 2 and the pressing plate 3 are driven by the lifting cylinder to reciprocate up and down.

[0046] like Figure 5 , Figure 6 As shown, the reset mechanism is located at the discharging station, and the reset mechanism includes a reset drive member 22, a connecting plate 27, a reset push rod 23, a top block 31, a gear 30 and a rack 29.

[0047] The reset driving member 22 is a reset cylinder, which is mounted on the frame 1 and located below the turntable 4 . The output end of the reset cylinder can slide back and forth along the radial direction of the turntable 4 .

[0048] The connecting plate 27 is vertically connected to the output end of the reset cylinder. A movable block 24 is provided on the top of the connecting plate 27. A movable block guide rod 25 extending vertically is connected to the bottom of the movable block 24. The movable block guide rod 25 is slidably arranged on the connecting plate 27 up and down. An elastic member 5 26 is connected between the bottom end of the movable block guide rod 25 and the connecting plate 27. The elastic member 5 26 is a compression spring and is sleeved on the outer side of the movable block guide rod 25.

[0049] Two reset push rods 23 are provided. The two reset push rods 23 extend horizontally and are parallel to each other. The two reset push rods 23 are vertically connected to the movable block 24 and are located on a side of the movable block 24 facing the turntable 4 .

[0050] There are four top blocks 31, each of which is provided at the bottom of each slot 501, and the top block 31 is located below the insert block 12 inserted into the slot 501. The top block 31 is specifically a vertically extending screw rod with a short length, which is fixedly mounted on the top mold 5 and can slide on the top mold 5 in the up and down directions. The specific anti-rotation installation method is: a vertically extending square rod is connected to the bottom end of the screw rod, and a vertically extending square hole is provided on the top mold 5, and the square rod is inserted into the square hole.

[0051] like Figure 6 As shown, there are four gears 30, and each top block 31 is spirally sleeved with a gear 30 on its outer side. The bottom mold 6 is provided with a gear groove for accommodating the gear 30. The gear 30 is located in the gear groove and is blocked by the groove wall of the gear groove and cannot move up and down. The gear 30 and the top block 31 are spirally coupled, and when the gear 30 rotates, it can drive the top block 31 to move in the up and down direction.

[0052] There are two racks 29, and one rack 29 is provided beside each of the two gears 30 located on the same side of the punching chamber 603. The top die 5 is provided with a strip-shaped slide groove, and the rack 29 is slidably inserted into the strip-shaped slide groove. An elastic member 6 38 is connected between the rack 29 and the top die 5, and the elastic member 6 38 is a compression spring that can be extended and retracted along the length direction of the rack 29. Each rack 29 is meshed with two corresponding gears 30 at the same time, and the two racks 29 are collinear with the two reset push rods 23 mentioned above.

[0053] When the reset driving member 22 drives the connecting plate 2 7 to move toward the turntable 4, the two reset push rods 23 are respectively inserted into the two strip-shaped slide grooves and push the two racks 29 to move toward the center of the turntable 4, driving the gear 30 to rotate, and the gear 30 drives the top block 31 to move upward, so that the top block 31 pushes the insert block 12 and the roller 13 to the outside of the slot 501, and then the top rod 11 can be swung upward and reset under the action of the torsion spring, and the top mold 5 is elastically reset upward under the action of the elastic member 3 14.

[0054] like Figure 5As shown, the discharge mechanism is also located at the discharge station, and the discharge mechanism includes a blowing pipe 28 and a discharge push rod 27, both of which extend in the radial direction of the turntable 4, and are connected to the connecting plate 27 and are located on the side of the connecting plate 27 facing the turntable 4. The blowing pipe 28 corresponds to the area between the top mold 5 and the bottom mold 6 after the reset in the radial direction of the turntable 4, and the discharge push rod 27 corresponds to the support block 32 in the radial direction of the turntable 4, and the blowing pipe 28 is shorter than the reset push rod 23 and the discharge push rod 27.

[0055] A support platform 39 is also provided at the discharging station. The support platform 39 is connected to the frame 1. The support platform 39 faces the discharge channel 602 on the bottom mold 6 in the molding assembly that rotates to the discharging station. The top surface of the support platform 39 is flush with the top surface of the turntable 4.

[0056] When the present invention is used, the friction material to be punched is placed in the loading box, and then the loading drive 19 is started. The loading drive 19 drives the connecting plate 8 to move toward the turntable 4, and inserts the loading box between the top die 5 and the bottom die 6. When the loading box moves to the top of the punching chamber 603 on the bottom die 6, the baffle 18 contacts the vertical plate 172, and the vertical plate 172 and the bottom plate 171 are blocked by the baffle 18 and no longer move forward. The connecting plate 8 drives the support plate 15 and the loading frame 16 to continue to move forward, and the loading frame 16 leaves the bottom plate 171, and the bottom end of the loading frame 16 is exposed. The material between the loading frame 16 and the bottom plate 171 falls into the punching chamber 603, and the loading is realized.

[0057] After the loading is completed, the loading drive 19 drives the connecting plate 8 to move back, driving the support plate 15 to move back. During this process, the scraper 36 is driven back by the support plate 15, and the scraper 36 scrapes the accumulated materials in the stamping chamber 603 flat, so that the materials in the stamping chamber 603 are more evenly distributed and the stamping effect is better.

[0058] After that, the servo motor 20 drives the turntable 4 to rotate 90 degrees, and the loaded die pressing assembly rotates to the stamping station for stamping, and the other set of die pressing assemblies rotates to the loading station for loading. At the stamping station, the punch moves downward, the pressure column 2 contacts the top die 5 and pushes the top die 5 to move downward, the pressure plate 3 contacts the push rod 11 and pushes the push rod 11 to swing downward, and the stamping is completed when the top die 5 moves downward to the bottom limit position, and at the same time, the push rod 11 swings to a vertical state, and the insert 12 is inserted into the slot 501, and then the punch moves upward to leave the top die 5, and the position of the top die 5 is locked by the push rod 11, and the top die 5 is fixed at the bottom limit position and tightly pressed on the stamped workpiece.

[0059] The servo motor 20 drives the turntable 4 to rotate 90 degrees again, and the molded components that have been stamped rotate to the pressure holding station for pressure holding, and the molded components that have been loaded rotate to the stamping station for stamping. After the pressure holding is completed, the turntable 4 rotates 90 degrees again, and the molded components that have been pressure holding rotate to the discharge station. The reset drive member 22 drives the connecting plate 2 7 to move toward the turntable 4, driving the reset push rod 23, the discharge push rod 27 and the blowing duct 28 to move toward the turntable 4. The reset push rod 23 pushes the rack 29 to move, and the rack 29 drives the gear 30 to rotate. The gear 30 drives the top block 31 to move upward. The top block 31 pushes the insert block 12 and the roller 13 to the outside of the slot 501. The top rod 11 swings upward and resets under the action of the torsion spring, and the top mold 5 moves upward and resets under the action of the elastic member 3 14. At the same time, the discharge push rod 27 pushes the support block 32 to move toward the center of the turntable 4, so that the support block 32 moves to the side of the stamping channel 601.

[0060] After that, the outlet end of the blowing duct 28 is inserted between the top die 5 and the bottom die 6, and moves to the top of the punching channel 601. The outlet end of the blowing duct 28 blows downward, blowing the workpiece stuck in the punching channel 601 into the discharge channel 602. After that, the reset drive member 22 drives the connecting plate 27 to move back, driving the reset push rod 23 and the discharge push rod 27 to exit the discharge channel 602. After the reset push rod 23 is separated from the top die 5, it moves downward to reset under the action of the elastic member 5 26, and the support block 32 is reset under the action of the elastic member 2 33, and pushes the workpiece along the discharge channel 602 toward the open end of the discharge channel 602, so that the center of gravity of the workpiece moves to the outside of the turntable 4. At this time, the workpiece is supported by the support platform 39 and will not fall from the turntable 4 temporarily, and at this time, the workpiece is not completely separated from the discharge channel 602, and the workpiece can also be driven by the turntable 4 to rotate synchronously under the obstruction of the side wall of the discharge channel 602. Then the turntable 4 continues to rotate 90 degrees, and the workpiece is driven to separate from the support platform 39 during the rotation process. At this time, the workpiece falls from the turntable 4 under the action of its own weight, and the discharge is realized.

[0061] After completing the reset and discharge at the discharge station, the molded component rotates with the turntable 4 to the loading station to continue repeating the above processing actions.

[0062] The present invention clamps the top die 5 at the bottom limit position through the push rod 11 to maintain the pressure of the workpiece, so that the stamping process and the pressure holding process can be carried out in different spaces. While stamping one brake pad, the other brake pad can be maintained under pressure. There is no need to wait during the pressure holding period, which can save time and effectively improve production efficiency.

[0063] In this embodiment, the feeding mechanism includes a feeding box, and the feeding is achieved by injecting materials into the stamping chamber 603 through the feeding box. In other embodiments, the feeding mechanism includes a conveying pipe and a conveying auger installed inside the conveying pipe. The conveying pipe and the conveying auger move to between the top mold 5 and the bottom mold 6 after the top mold 5 and the bottom mold 6 are separated, and then the conveying auger is driven to rotate, so that the material falls into the stamping chamber 603 from the outlet of the conveying pipe.

[0064] In this embodiment, the reset mechanism includes a reset push rod 23 and a push block 31. The reset push rod 23 is connected to the push block 31 through a rack 29 and a gear 30 to drive the push block 31 to move upward to push the plug block 12 out of the slot 501. In other embodiments, the reset mechanism includes a reset push rod 23 and a slider. The slider is slidably mounted on the bottom mold 6 and is located below the plug block 12. A push ramp is provided on the top of the slider. The reset push rod 23 can push the slider to move, so that the slider pushes the plug block 12 upward through the push ramp, thereby pushing the plug block 12 out of the slot 501.

Claims

1. A drum brake pad stamping processing equipment, comprising a frame, a die pressing assembly and a punch that can move up and down are arranged on the frame, characterized in that: The frame is also provided with a turntable which is arranged horizontally and can rotate around a vertically extending axis. The outer circumference of the turntable is provided with a loading station, a stamping station, a pressure holding station and a material discharging station which are arranged sequentially and evenly. The punch is located at the stamping station. The die pressing assembly is provided with four groups and is evenly arranged on the turntable along the circumference of the turntable. The die pressing assembly includes a bottom die fixed on the turntable, a top die elastically movable up and down and arranged above the bottom die, a fixed shaft fixed on the turntable and located above the top die, and a top rod rotatably mounted on the fixed shaft. A torsion spring is connected between the top rod and the fixed shaft to keep the top rod in an inclined state. An insert block that can elastically move along the rod length direction of the top rod is provided at the bottom end of the top rod, and a slot with an opening facing upward is provided on the top die. The turntable can rotate the set angle in sequence to drive each molding component to rotate to each station in sequence. When the molding component rotates to the stamping station, the punch pushes the top mold to move downward for stamping, and pushes the ejector rod to swing downward. When the top mold moves to the bottom limit position, the ejector rod swings to a vertical state, and the insert block is inserted into the slot when the ejector rod swings to a vertical state.

2. A drum brake pad stamping equipment according to claim 1, characterized in that: The punch includes a pressure column and a pressure plate vertically connected to the pressure column. The bottom end of the pressure column is located below the pressure plate. During the downward movement of the punch, the pressure column pushes the top die to move downward, and the pressure plate pushes the ejector rod to swing downward.

3. A drum brake pad stamping equipment according to claim 1 or 2, characterized in that: A feeding mechanism is also provided on the frame, which is located at the feeding station. The feeding mechanism includes a feeding box which can move radially along the turntable. The feeding box includes a feeding frame which is closed on all sides and penetrates from top to bottom, and a sealing member for sealing the bottom of the feeding frame. The sealing member and the feeding frame can move relative to each other when the feeding box moves above the bottom mold, so as to open the bottom of the feeding box and allow the material in the feeding box to fall onto the bottom mold.

4. The drum brake pad stamping equipment according to claim 3, characterized in that: The feeding frame and the sealing member can slide relative to each other in the radial direction of the turntable, and an elastic member that can expand and contract in the radial direction of the turntable is connected between the two. The elastic member keeps the sealing member in a state relative to the feeding frame in the upper and lower directions. The feeding mechanism also includes a baffle installed on the frame, and the baffle and the sealing member block each other in the radial direction of the turntable. When the feeding box moves to the set position above the bottom mold, the sealing member is blocked by the baffle and staggered with the feeding frame, so that the material in the feeding box falls onto the bottom mold.

5. A drum brake pad stamping equipment according to claim 1 or 2, characterized in that: The frame is also provided with a reset mechanism, which is located at the discharging station. The reset mechanism includes a top block and a reset push rod. The top block is movably installed on the top mold and is located below the insert block inserted into the slot. The reset push rod is movably installed on the frame. The reset push rod is transmission-connected with the top block. The reset push rod can move toward the turntable to drive the top block to move upward, so that the top block pushes the insert block out of the slot.

6. The drum brake pad stamping equipment according to claim 5, characterized in that: The top block is a vertically extending screw, which is fixedly installed in the top mold. A gear is spirally sleeved on the outside of the screw, and the gear is fixedly installed on the top mold in the upper and lower positions. A rack that can elastically slide in the horizontal direction is provided in the top mold, and the rack is meshed with the gear. The reset push rod can push the rack to slide in the process of moving toward the turntable to drive the gear to rotate, thereby driving the screw to move upward to push the insert out of the slot.

7. The drum brake pad stamping equipment according to claim 6, characterized in that: The bottom die is provided with a stamping channel which runs through from top to bottom and a discharging channel which extends radially along the turntable. The discharging channel is closed at one end close to the center of the turntable and is open at the other end. The discharging channel is located at the bottom of the stamping channel and is connected with the stamping channel. A support block is slidably installed in the discharging channel. An elastic member 2 is connected between the support block and the bottom die. The elastic member 2 applies an elastic force to the support block which is back to the center of the turntable, so that the support block remains in a state of blocking the bottom end of the stamping channel. The bottom end of the stamping channel is blocked by the support block to form a stamping chamber.

8. The drum brake pad stamping equipment according to claim 7, characterized in that: The frame is provided with a discharge mechanism, which is located at the discharge station. The discharge mechanism includes a blowing pipe and a discharge push rod. The blowing pipe is movably installed on the frame along the radial direction of the turntable. The air outlet end of the blowing pipe lags behind the end of the reset push rod close to the turntable in the horizontal direction, so that the air outlet end of the blowing pipe can be inserted between the top mold and the bottom mold after the top mold is reset upward. The discharging push rod and the support block block each other in the radial direction of the turntable, and the end of the discharging push rod close to the turntable leads the air outlet end of the blowing duct in the horizontal direction, so that the discharging push rod can push the support block away before the air outlet end of the blowing duct moves to above the stamping chamber, and the air outlet end of the blowing duct can blow air downward to blow the brake pad stuck in the stamping channel into the discharging channel, and the discharging push rod moves back to the turntable after the brake pad enters the discharging channel to allow the support block to elastically reset and push the center of gravity of the brake pad to the outside of the turntable.

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