Bicycle accessory stamping device with buffer structure and stamping method

Abstract

The invention relates to the technical field of stamping equipment, in particular to a bicycle accessory stamping device with a buffer structure and a stamping method.The stamping device comprises a support, a supporting table and a stamping assembly, the stamping assembly comprises a first linear driver and a lifting table, and an upper die is slidably mounted at the bottom of the lifting table; the upper die is elastically connected with the lifting platform through a buffer spring; a forming hole is formed in the axis of the upper die, a punching rod is rotationally installed on the lifting table, polishing pieces are installed on the peripheral side of the punching rod, a bottom die located below the upper die is arranged on the supporting table and composed of an outer die block, a lifting shaft die and an inner die core, and a second forming hole is formed in the inner die core located at the axis of the upper die. According to the technical scheme, the stamping assembly is matched with the upper die, the bottom die and the lifting table to conduct stamping forming on the bowl set cover and then directly conduct punching machining, and after the punching rod is inserted into the second forming hole, the polishing pieces on the peripheral side of the punching rod are attached to the inner wall of the hole of the bowl set cover to directly conduct polishing and deburring.

Description

Technical Field

[0001] The invention relates to the technical field of stamping equipment, and in particular to a stamping device and a stamping method for bicycle accessories with a buffer structure. Background Art

[0002] Bicycle headset covers may have many shapes, such as bosses, wire grooves, steps and other complex structures. Stamping can easily produce these shapes by designing complex molds. The concave and convex structure of the mold can form the metal sheet into the corresponding shape during the stamping process. Whether it is a round, square or headset cover with various special shapes, it can be achieved through the stamping process.

[0003] After punching the headset cover, it is usually necessary to punch holes at its axis. Moving the headset cover to the punching machine for punching requires reloading and positioning, which is a relatively complicated operation. In addition, burrs are likely to be generated when punching the headset cover. This is because the punching process is to apply pressure to the metal sheet through the die to cause the sheet to undergo plastic deformation to obtain the desired shape. When the punching edge cuts through the metal sheet, the fracture process of the sheet is a complex process, and the material is subjected to multiple forces such as shear force and tensile force at the cutting edge. If the die edge is not sharp enough or is severely worn, irregular metal protrusions are likely to be generated on the cut edge at the end of the punching, which requires separate deburring, which is very time-consuming. Summary of the invention

[0004] In view of the above problems, it is necessary to provide a bicycle accessory stamping device and a stamping method with a buffer structure to address the problems of the prior art.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] A bicycle accessory stamping device with a buffer structure comprises a bracket and a support platform horizontally mounted on the bracket, the bracket is provided with a stamping assembly above the support platform, the stamping assembly comprises a first linear drive arranged to move in a vertical direction, a lifting platform is fixedly mounted on the working end of the first linear drive, the lifting platform is slidably mounted on the bracket, an upper die is slidably mounted at the bottom of the lifting platform, and the upper die and the lifting platform are elastically connected by a buffer spring; a forming hole is arranged at the axis of the upper die, a punching rod is rotatably mounted on the lifting platform, the punching rod is inserted in the forming hole to keep the bottom end flush with the bottom surface of the forming hole, a grinding sheet is mounted on the circumference of the punching rod, and a rotating drive unit for driving the punching rod to rotate around its own axis is arranged on the lifting platform; a bottom die is arranged below the upper die, the bottom die is composed of an outer module, a lifting shaft die and an inner die core, and a second forming hole which is in the same straight line as the forming hole is arranged on the inner die core located at the axis of the upper die; a feeding hole is arranged below the forming hole on the support platform, and a waste collection box is fixedly mounted on the support platform below the feeding hole.

[0007] Two guide rods extending vertically downward are arranged at the bottom of the lifting platform, and a guide hole which is in the same straight line as the guide rod and has the same diameter as the guide rod is arranged on the upper mold, an inner hole is coaxially arranged below the guide hole, and the diameter of the inner hole is larger than the diameter of the guide hole, and a limit head is coaxially arranged at one end of the guide rod extending through the guide hole into the inner hole, and the diameter of the limit head is the same as the diameter of the inner hole; the inner hole is connected to a side opening extending radially along the guide hole to the outer wall of the upper mold, and a positioning block is slidably installed in the side opening, and the positioning block is inserted in the side opening and is located below the limit head to limit the position of the limit head in the inner hole.

[0008] Preferably, the straight-line distance between the top side of the inner hole and the top side of the side opening is not less than the thickness of the limit head.

[0009] Preferably, a connecting frame is provided at one end of each positioning block extending to the outside of the upper mold, and both connecting frames are provided with racks extending parallel to the length direction of the positioning block. Both racks are meshed and connected with gears rotatably mounted on the upper mold. A second rotary drive is fixedly mounted on one side of the upper mold, and the working end of the second rotary drive is connected to the gear transmission through a transmission belt.

[0010] Preferably, a ball is rotatably mounted on the bottom end of the limit head.

[0011] Preferably, the rotation drive unit includes a swivel coaxially installed on the top of the punching rod, the punching rod is rotatably installed on the lifting platform through the swivel, a first bevel gear is coaxially installed on the top of the swivel, the first bevel gear is meshed and connected with a second bevel gear rotatably installed on the upper side of the lifting platform, and a first rotation driver that drives the second bevel gear to rotate is fixedly installed on the upper side of the lifting platform.

[0012] Preferably, the bracket is provided with a horizontally extending discharge hole, and there are two bottom molds. The outer modules of the two bottom molds are connected by a horizontal connecting plate and slidably installed in the limiting slide groove. Limiting baffles are provided at both ends of the limiting slide groove. A second linear drive is fixedly installed on one of the limiting baffles. The working end of the second linear drive moves along the length direction of the limiting slide groove, and the working end of the second linear drive is connected to one of the bottom molds; when the second linear drive drives one of the bottom molds to move to fit the limiting baffle on one side, the second forming hole of the bottom mold on the other side is on the same straight line as the forming hole of the upper mold.

[0013] Preferably, a center hole is provided in the outer module, the lifting shaft mold is installed in the center hole, the inner mold core is located at the axis of the lifting shaft mold, and a blanking sleeve is provided at the bottom of the inner mold core, and the blanking sleeve is attached to the upper surface of the support platform, and the lifting shaft mold is provided with side grooves surrounding the outer wall of the lifting shaft mold. A number of push rods extending vertically downward are provided on the top of the side grooves, and the push rods are attached to the surface of the support platform. The lifting shaft mold and the top of the inner mold core are spliced ​​to form a model of the bowl set cover for stamping; a sinking groove is provided on the upper side of the support platform, and the sinking groove extends from the center of the support platform to the limit baffle along the moving path of the push rod, and the surface of the sinking groove is lower than the surface of the support platform; the diameter of the blanking sleeve is larger than the diameter of the push rod, and the diameter of the inner mold core is smaller than the diameter of the bowl set cover.

[0014] Preferably, an inner limit ring surrounding the inner wall is provided on the outer module of the bottom mold, the inner limit ring is located in the side groove of the lifting shaft mold, an elastic part is sleeved on the top rod, the elastic part elastically connects the bottom surface of the side groove and the bottom surface of the inner limit ring, and the elastic part applies a downward elastic force to the lifting shaft mold.

[0015] A bicycle accessory stamping method with a buffer structure is applied to a bicycle accessory stamping device with a buffer structure, comprising the following steps:

[0016] Step 1: Place the material to be stamped into the bottom die, and move the bottom die to the bottom of the stamping assembly;

[0017] Step 2: The first linear drive is started to drive the lifting platform and the upper die to move downward to punch the material in the bottom die;

[0018] Step 3: After the stamping is completed, the upper die is fixed in position, and the first linear drive drives the lifting platform to continue to move downward so that the punching rod punches the bowl cover;

[0019] Step 4: Insert the punching rod into the forming hole, and the rotary drive unit drives the punching rod to rotate to grind and remove burrs on the punching part of the bowl cover.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Firstly, the stamping assembly in the present invention cooperates with the upper die, the bottom die and the lifting platform to directly perform punching processing after the bowl set cover is stamped and formed. After the punching rod is inserted into the second forming hole, the grinding sheet on the side of the punching rod fits the inner wall of the hole of the bowl set cover. At this time, the rotary drive unit drives the punching rod to rotate, and the grinding sheet directly grinds and removes burrs on the inner wall of the hole of the bowl set cover, saving subsequent processing steps and greatly improving the overall processing efficiency.

[0022] Secondly, the guide rod arranged under the lifting platform in the present invention is inserted in the guide hole of the upper mold to guide the relative movement path of the upper mold and the lifting platform. The positioning block slidably installed in the side opening arranged on one side of the inner hole of the upper mold can be located below the limit head at the bottom end of the guide rod during stamping. When the upper mold fits the material, the limit head moves down to fit the positioning block to ensure that the upper mold elastically installed under the lifting platform has sufficient pressure on the material during stamping. When the stamping is completed, the positioning block moves along the side opening to disengage from the limit head, and the punching rod can move down to punch the material.

[0023] Thirdly, two bottom molds are slidably installed in the limiting slide groove of the present invention. When the bottom mold located below the stamping assembly cooperates with the upper mold to stamp the material, the bottom mold on the other side away from the stamping assembly can be loaded and unloaded by staff manually or by a robotic arm, thereby improving work efficiency. The bottom mold is composed of an outer module, a lifting shaft mold and an inner mold core. When the second linear drive drives the bottom mold away from the stamping assembly, the push rod at the bottom of the lifting shaft mold moves to the sinking groove, and the push rod moves downward in contact with the surface of the sinking groove, so that the edge of the bowl set cover is exposed to the outside of the inner mold core, making it convenient for staff to manually or automatically grab the material for unloading by a robotic arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of a bicycle accessory stamping device with a buffer structure in a non-working state;

[0025] Figure 2 It is a side view of a bicycle accessory punching device with a buffer structure in a non-working state;

[0026] Figure 3 yes Figure 2 A cross-sectional view at AA of FIG.

[0027] Figure 4 yes Figure 3 A partial enlarged view of point B;

[0028] Figure 5 yes Figure 3 A partial enlarged view of point C;

[0029] Figure 6 yes Figure 3 A partial enlarged view of point D;

[0030] Figure 7 It is a side view of a bicycle accessory punching device with a buffer structure in a working state;

[0031] Figure 8 yes Figure 7 A cross-sectional view at EE of FIG.

[0032] Fig. 9 yes Figure 8A partial enlarged view of point F;

[0033] Fig.10 A three-dimensional structural analysis of a bicycle parts stamping device with a buffer structure Figure 1 ;

[0034] Fig.11 A three-dimensional structural analysis of a bicycle parts stamping device with a buffer structure Figure 2 .

[0035] The numbers in the figure are: 1, bracket; 11, support table; 111, feed hole; 112, limit slide; 113, limit baffle; 114, second linear drive; 115, sinking trough; 12, waste collection box; 2, stamping assembly; 21, first linear drive; 22, lifting platform; 221, guide rod; 222, limit head; 223, ball; 23, buffer spring; 24, punching rod; 241, grinding disc; 25, rotation drive unit; 251, swivel; 252, first bevel gear; 253, second bevel gear; 254 , first rotary driver; 3, upper die; 31, forming hole; 32, guide hole; 321, inner hole; 322, side opening; 33, positioning block; 331, connecting frame; 332, rack; 333, gear; 334, second rotary driver; 335, transmission belt; 4, bottom die; 41, outer module; 411, center hole; 412, inner limit ring; 42, lifting shaft die; 421, side groove; 422, ejector rod; 423, elastic member; 43, inner die core; 431, second forming hole; 432, blanking sleeve; 44, connecting plate. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Reference Figures 1 to 11 :

[0038] A bicycle accessory stamping device with a buffer structure comprises a bracket 1 and a support platform 11 horizontally mounted on the bracket 1. The bracket 1 is provided with a stamping assembly 2 above the support platform 11. The stamping assembly 2 comprises a first linear drive 21 arranged to move in the vertical direction. A lifting platform 22 is fixedly mounted on the working end of the first linear drive 21. The lifting platform 22 is slidably mounted on the bracket 1. An upper die 3 is slidably mounted on the bottom of the lifting platform 22. The upper die 3 and the lifting platform 22 are elastically connected by a buffer spring 23. A forming hole 31 is provided at the axis of the upper die 3. A punching rod 24 is rotatably mounted on the lifting platform 22. The punching rod 24 is inserted into The bottom end of the forming hole 31 is kept flush with the bottom surface of the forming hole 31, a grinding sheet 241 is installed on the periphery of the punching rod 24, and a rotating drive unit 25 for driving the punching rod 24 to rotate around its own axis is provided on the lifting platform 22; a bottom mold 4 located below the upper mold 3 is provided on the support platform 11, and the bottom mold 4 is composed of an outer module 41, a lifting shaft mold 42 and an inner mold core 43, and a second forming hole 431 which is in the same straight line as the forming hole 31 is provided on the inner mold core 43 located at the axis of the upper mold 3; a feed hole 111 is provided below the forming hole 31 on the support platform 11, and a waste collection box 12 is fixedly installed below the feed hole 111 on the support platform 11.

[0039] When the stamping device of the present invention is in use, the staff places the material to be stamped above the bottom die 4, and the stamping assembly 2 located above the bottom die 4 drives the upper die 3 to fit with the bottom die 4 to stamp the material. The stamping assembly 2 in this embodiment drives the lifting platform 22 to lift and lower through the first linear drive 21, and the punching rod 24 and the upper die 3 are elastically connected through the buffer spring 23, so that a certain buffer can be generated when the upper die 3 contacts the material. After the upper die 3 contacts the material, the first linear drive 21 drives the lifting platform 22 to continue to move downward to stamp the material. The material is located between the upper die 3 and the bottom die 4 for stamping and forming. The upper die 3 in this embodiment A forming hole 31 is provided at the axis. When the upper mold 3 punches the material, the punching rod 24 on the lifting platform 22 is inserted into the forming hole 31 and keeps the bottom end flush with the bottom surface of the upper mold 3 to ensure the stamping of the material. The lifting platform 22 can drive the punching rod 24 to move downward relative to the upper mold 3 after the position of the upper mold 3 is fixed. The punching rod 24 punches the material fixed in the upper mold 3 and the bottom mold 4. The punching is completed when the punching rod 24 is inserted into the second forming hole 431 of the bottom mold 4. The waste generated by the punching falls directly into the discharge hole 111 located below the second forming hole 431 set on the support platform 11, and is uniformly collected in the waste collection box 12 below. After the punching rod 24 is inserted into the second forming hole 431, the grinding sheet 241 on the side of the punching rod 24 fits the inner wall of the hole of the bowl set cover. At this time, the rotary drive unit 25 drives the punching rod 24 to rotate, and the grinding sheet 241 directly grinds and removes burrs on the inner wall of the hole of the bowl set cover. When the first linear drive 21 drives the lifting platform 22 to move upward, the material in the bottom mold 4 has been deburred and can be directly unloaded, saving subsequent processing steps and greatly improving the overall processing efficiency.

[0040] In order to solve the problem of how to ensure that the upper die 3 elastically mounted under the lifting platform 22 exerts sufficient pressure on the material during stamping, the following features are specifically set:

[0041] Two guide rods 221 extending vertically downward are provided at the bottom of the lifting platform 22, and a guide hole 32 which is in the same straight line as the guide rod 221 and has the same diameter as the guide rod 221 is provided on the upper mold 3, an inner hole 321 is coaxially provided below the guide hole 32, the diameter of the inner hole 321 is larger than the diameter of the guide hole 32, and a limiting head 222 is coaxially provided at one end of the guide rod 221 extending through the guide hole 32 to the inner hole 321, and the diameter of the limiting head 222 is the same as the diameter of the inner hole 321; the inner hole 321 is connected to a side opening 322 which extends radially along the guide hole 32 to the outer wall of the upper mold 3, and a positioning block 33 is slidably installed in the side opening 322, and the positioning block 33 is inserted in the side opening 322 and is located below the limiting head 222 to limit the position of the limiting head 222 in the inner hole 321.

[0042] The first linear drive 21 in this embodiment can be a cylinder, an oil cylinder or an electric push rod, etc. The guide rod 221 arranged below the lifting platform 22 is inserted into the guide hole 32 of the upper mold 3 to guide the relative movement path of the upper mold 3 and the lifting platform 22. The limit head 222 of the guide rod 221 is located in the inner hole 321 of the upper mold 3. The buffer spring 23 can be sleeved on the outside of the punching rod 24 or on the outside of the guide rod 221. In the non-stamping state, the upper mold 3 is kept below the lifting platform 22, and the limit head 222 of the guide rod 221 fits in the inner hole 321 of the upper mold 3. At the top of the inner hole 321 of the upper mold 3, the positioning block 33 is inserted in the side opening 322 and moves to below the limit head 222. When the upper mold 3 is attached to the bottom mold 4, the lifting platform 22 continues to move downward relative to the upper mold 3. When the limit head 222 is attached to the top of the positioning block 33, the bottom end of the punching rod 24 moves down to a position flush with the bottom surface of the upper mold 3 to seal the forming hole 31. The distance between the lifting platform 22 and the upper mold 3 is fixed, so the pressure of the first linear drive 21 driving the lifting platform 22 to move downward can drive the upper mold 3 to punch the material on the bottom mold 4.

[0043] In order to ensure the buffering effect when the upper die 3 contacts the material, the following features are specifically set:

[0044] The straight-line distance between the top side of the inner hole 321 and the top side of the side opening 322 is not less than the thickness of the limiting head 222 .

[0045] In this embodiment, the straight-line distance between the top side of the inner hole 321 and the top side of the side opening 322 is not less than the thickness of the limit head 222. Therefore, it can be ensured that after the upper mold 3 contacts the material on the bottom mold 4 and stops moving, the lifting platform 22 can still move downward relative to the upper mold 3. During this process, the lifting platform 22 compresses the buffer spring 23, and the limit head 222 moves downward in the inner hole 321 of the upper mold 3 until it fits into the upper side of the positioning block 33.

[0046] In order to solve the problem of how to make the positioning block 33 separate from the bottom of the limit head 222 so as to facilitate the punching rod 24 to move downward for punching, the following features are specifically set:

[0047] A connecting frame 331 is provided at one end of each positioning block 33 extending to the outside of the upper mold 3, and the two connecting frames 331 are provided with racks 332 extending parallel to the length direction of the positioning block 33. The two racks 332 are meshed and connected with a gear 333 rotatably mounted on the upper mold 3. A second rotary driver 334 is fixedly mounted on one side of the upper mold 3, and the working end of the second rotary driver 334 is connected to the gear 333 through a transmission belt 335.

[0048] The positioning block 33 in this embodiment is connected to the rack 332 through an external connecting frame 331. The second rotating driver 334 fixedly installed on one side of the upper mold 3 can be a servo motor. When the second rotating driver 334 drives the gear 333 to rotate through the transmission belt 335, the two racks 332 move synchronously in opposite directions, thereby driving the two positioning blocks 33 to move radially along the upper mold 3 in the rack 332 until the positioning block 33 is disengaged from the bottom of the limit head 222, so that the limit head 222 can continue to move downward along the inner hole 321 when the upper mold 3 is in a fixed position. When the first linear driver 21 continues to drive the lifting platform 22 to move downward, the punching rod 24 can punch the bowl set cover fixed to the upper mold 3 and the bottom mold 4.

[0049] In order to solve the problem of how to ensure that the positioning block 33 can be pulled out from under the limit head 222 when the limit head 222 applies pressure to the positioning block 33, the following features are specifically set:

[0050] A ball bearing 223 is rotatably mounted on the bottom end of the limiting head 222 .

[0051] In this embodiment, the ball 223 below the limit head 222 fits against the upper side of the positioning block 33, and the ball 223 converts the sliding friction between the limit head 222 and the positioning block 33 into rolling friction, so that when the second rotary driver 334 drives the gear 333 to rotate, the positioning block 33 can be easily pulled out from under the limit head 222, so that the limit head 222 can continue to move downward.

[0052] In order to solve the problem of how to drive the punching rod 24 to rotate, the following features are specifically set:

[0053] The rotation drive unit 25 includes a swivel 251 coaxially installed on the top of the punching rod 24. The punching rod 24 is rotatably installed on the lifting platform 22 through the swivel 251. A first bevel gear 252 is coaxially installed on the top of the swivel 251. The first bevel gear 252 is meshed and connected with a second bevel gear 253 rotatably installed on the upper side of the lifting platform 22. A first rotation driver 254 that drives the second bevel gear 253 to rotate is fixedly installed on the upper side of the lifting platform 22.

[0054] The first rotary driver 254 fixedly installed on the lifting platform 22 in this embodiment can be a servo motor, etc. The working end of the first rotary driver 254 drives the second bevel gear 253 to drive the first bevel gear 252 to rotate. The first bevel gear 252 is installed on the swivel 251 at the top of the punching rod 24. Therefore, the first rotary driver 254 can drive the punching rod 24 to rotate so that the swivel 251 grinds and deburrs the inner wall of the hole of the bowl set cover. The punching rod 24 is rotatably installed on the lifting platform 22 through the swivel 251, so that the punching rod 24 can rotate while following the lifting platform 22 to move in the vertical direction.

[0055] In order to solve the problem of how to unload the material after stamping, the following features are specifically set:

[0056] A horizontally extending feed hole 111 is provided on the bracket 1, and the bottom mold 4 has two. The outer modules 41 of the two bottom molds 4 are connected by a horizontal connecting plate 44 and slidably installed in the limiting slide groove 112. Limiting baffles 113 are provided at both ends of the limiting slide groove 112. A second linear driver 114 is fixedly installed on one of the limiting baffles 113. The working end of the second linear driver 114 moves along the length direction of the limiting slide groove 112, and the working end of the second linear driver 114 is connected to one of the bottom molds 4; when the second linear driver 114 drives one of the bottom molds 4 to move to fit the limiting baffle 113 on one side, the second forming hole 431 of the bottom mold 4 on the other side is on the same straight line with the forming hole 31 of the upper mold 3.

[0057] A limiting slot 112 is provided on the support table 11 in the present embodiment, and two bottom molds 4 are slidably installed in the limiting slot 112, and the bottom molds 4 are connected by a fixed-length external module 41. Therefore, when the second linear drive 114 on one side of the support table 11 pushes one of the bottom molds 4 to move in the limiting slot 112, the other bottom mold 4 moves synchronously, and when one of the bottom molds 4 moves to fit the limiting baffle 113 on one side, the second forming hole 431 of the bottom mold 4 on the other side is in the same straight line with the forming hole 31 of the upper mold 3, so the position of the bottom mold 4 can be positioned, and when the bottom mold 4 located below the stamping assembly 2 cooperates with the upper mold 3 to stamp the material, the bottom mold 4 on the other side away from the stamping assembly 2 can be loaded and unloaded manually by staff or by a robotic arm, thereby improving work efficiency.

[0058] In order to solve the problem of how to facilitate the unloading of the material in the bottom mold 4, the following features are specifically set:

[0059] The outer module 41 is provided with a central hole 411, the lifting shaft mold 42 is installed in the central hole 411, the inner mold core 43 is located at the axis of the lifting shaft mold 42, and a blanking sleeve 432 is provided at the bottom of the inner mold core 43, and the blanking sleeve 432 is attached to the upper surface of the support platform 11. The lifting shaft mold 42 is provided with a side groove 421 surrounding the outer wall of the lifting shaft mold 42, and a plurality of top rods 422 extending vertically downward are provided on the top of the side groove 421, and the top rods 422 are attached to the support platform 11. On the surface of the support platform 11, the lifting shaft mold 42 and the top of the inner mold core 43 are spliced ​​to form a model of the bowl set cover for stamping; a sinking groove 115 is arranged on the upper side of the support platform 11, and the sinking groove 115 extends from the center of the support platform 11 to the limiting baffle 113 along the moving path of the push rod 422, and the surface of the sinking groove 115 is lower than the surface of the support platform 11; the diameter of the blanking sleeve 432 is larger than the diameter of the push rod 422, and the diameter of the inner mold core 43 is smaller than the diameter of the bowl set cover.

[0060] An inner limit ring 412 surrounding the inner wall is arranged on the outer module 41 of the bottom mold 4, and the inner limit ring 412 is located in the side groove 421 of the lifting shaft mold 42. An elastic member 423 is sleeved on the top rod 422, and the elastic member 423 elastically connects the bottom surface of the side groove 421 and the bottom surface of the inner limit ring 412. The elastic member 423 applies a downward elastic force to the lifting shaft mold 42.

[0061] The bottom mold 4 in this embodiment is composed of an outer module 41, a lifting shaft mold 42 and an inner mold core 43. The connecting plate 44 connects the outer wall of the outer module 41 of the two bottom molds 4. The lifting shaft mold 42 is located in the center hole 411 of the outer module 41. The inner mold core 43 is located at the axis of the lifting shaft mold 42. Therefore, the outer module 41, the lifting shaft mold 42 and the inner mold core 43 can keep the relative position fixed and move synchronously. The bottom of the outer module 41 is in contact with the upper surface of the support platform 11, the blanking sleeve 432 at the bottom of the inner mold core 43 is in contact with the upper surface of the support platform 11, and the top rod 422 under the lifting shaft mold 42 is in contact with the upper surface of the support platform 11. When the second linear drive 114 drives the bottom die 4 to move away from the stamping assembly 2, the top rod 422 at the bottom of the lifting shaft die 42 moves to the sinking groove 115, and the lifting shaft die 42 automatically moves downward under the action of gravity and the elastic force of the elastic member 423, and the top rod 422 fits the surface of the sinking groove 115. The downward movement of the lifting shaft die 42 can expose the edge of the bowl set cover outside the inner mold core 43, which is convenient for the staff to manually or the robot arm to automatically grab the material for unloading.

[0062] A bicycle accessory stamping method with a buffer structure is applied to a bicycle accessory stamping device with a buffer structure, comprising the following steps:

[0063] Step 1: Place the material to be stamped into the bottom die 4, and move the bottom die 4 below the stamping assembly 2;

[0064] Step 2: The first linear drive 21 is started to drive the lifting platform 22 and the upper mold 3 to move downward to punch the material in the bottom mold 4;

[0065] Step 3: After the punching is completed, the upper die 3 is fixed in position, and the first linear drive 21 drives the lifting platform 22 to continue to move downward so that the punching rod 24 punches holes in the bowl set cover;

[0066] Step 4: The punching rod 24 is inserted into the forming hole 31, and the rotation driving unit 25 drives the punching rod 24 to rotate to grind and remove burrs on the punching part of the headset cover.

[0067] Working principle: When in use, the staff places the material to be punched above the bottom die 4, and the punching assembly 2 located above the bottom die 4 drives the upper die 3 to fit with the bottom die 4 to punch the material. After the upper die 3 contacts the material, the punching rod 24 on the lifting platform 22 is inserted into the forming hole 31 and keeps the bottom end flush with the bottom surface of the upper die 3. The first linear drive 21 drives the lifting platform 22 to continue to move downward to punch the material. The material is located between the upper die 3 and the bottom die 4 for stamping and forming. After the stamping is completed, the first linear drive 21 can drive the lifting platform 22 to move downward relative to the upper die 3 when the position of the upper die 3 is fixed, and the punching rod 24 on the lifting platform 22 punches the material fixed in the upper die 3 and the bottom die 4. Punching is performed. When the punching rod 24 is inserted into the second forming hole 431 of the bottom die 4, the punching is completed. The waste generated by the punching falls directly into the unloading hole 111 located below the second forming hole 431 provided on the support table 11, and is uniformly collected in the waste collection box 12 below. After the punching rod 24 is inserted into the second forming hole 431, the grinding sheet 241 on the side of the punching rod 24 fits the inner wall of the hole of the bowl set cover. At this time, the rotary drive unit 25 drives the punching rod 24 to rotate, and the grinding sheet 241 directly grinds and removes burrs on the inner wall of the hole of the bowl set cover. When the first linear drive 21 drives the lifting platform 22 to move upward, the material in the bottom die 4 has been deburred and can be directly unloaded.

[0068] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A bicycle accessory punching device with a buffer structure, characterized in that: The invention comprises a support (1) and a support platform (11) horizontally mounted on the support (1); the support (1) is provided with a stamping assembly (2) above the support platform (11); the stamping assembly (2) comprises a first linear drive (21) arranged to move in a vertical direction; a lifting platform (22) is fixedly mounted on the working end of the first linear drive (21); the lifting platform (22) is slidably mounted on the support (1); an upper die (3) is slidably mounted on the bottom of the lifting platform (22); and the upper die (3) and the lifting platform (22) are elastically connected via a buffer spring (23); A forming hole (31) is arranged at the axis of the upper die (3); a punching rod (24) is rotatably mounted on the lifting platform (22); the punching rod (24) is inserted into the forming hole (31) to keep the bottom end flush with the bottom surface of the forming hole (31); a grinding sheet (241) is installed on the circumference of the punching rod (24); and a rotation driving unit (25) is arranged on the lifting platform (22) to drive the punching rod (24) to rotate around its own axis; A bottom mold (4) located below the upper mold (3) is arranged on the support platform (11); the bottom mold (4) is composed of an outer mold block (41), a lifting shaft mold (42) and an inner mold core (43); and a second molding hole (431) located on the same straight line as the molding hole (31) is arranged on the inner mold core (43) located at the axis of the upper mold (3); The support platform (11) is provided with a material discharge hole (111) below the forming hole (31), and a waste collection box (12) is fixedly installed on the support platform (11) below the material discharge hole (111).

2. A bicycle accessory punching device with a buffer structure according to claim 1, characterized in that: The bottom of the lifting platform (22) is provided with two guide rods (221) extending vertically downward, the upper mold (3) is provided with a guide hole (32) which is in the same straight line as the guide rod (221) and has the same diameter as the guide rod (221), an inner hole (321) is coaxially provided below the guide hole (32), the diameter of the inner hole (321) is larger than the diameter of the guide hole (32), and a limiting head (222) is coaxially provided at one end of the guide rod (221) extending through the guide hole (32) into the inner hole (321), and the diameter of the limiting head (222) is the same as the diameter of the inner hole (321); The inner hole (321) is connected to a side opening (322) which radially extends along the guide hole (32) to the outer wall of the upper mold (3); a positioning block (33) is slidably installed in the side opening (322); the positioning block (33) is inserted into the side opening (322) and is located below the limit head (222) to limit the position of the limit head (222) in the inner hole (321).

3. A bicycle accessory punching device with a buffer structure according to claim 2, characterized in that: The straight-line distance between the top side of the inner hole (321) and the top side of the side opening (322) is not less than the thickness of the limiting head (222).

4. The bicycle accessory punching device with a buffer structure according to claim 2, characterized in that: A connecting frame (331) is provided at one end of each positioning block (33) extending to the outside of the upper mold (3); a rack (332) extending parallel to the length direction of the positioning block (33) is provided on the two connecting frames (331); the two racks (332) are meshedly connected with a gear (333) rotatably mounted on the upper mold (3); a second rotary driver (334) is fixedly mounted on one side of the upper mold (3); and a working end of the second rotary driver (334) is transmission-connected to the gear (333) via a transmission belt (335).

5. A bicycle accessory punching device with a buffer structure according to claim 4, characterized in that: A ball (223) is rotatably mounted on the bottom end of the limiting head (222).

6. The bicycle accessory punching device with a buffer structure according to claim 2, characterized in that: The rotary drive unit (25) comprises a rotating ring (251) coaxially mounted on the top of the punching rod (24); the punching rod (24) is rotatably mounted on the lifting platform (22) via the rotating ring (251); a first bevel gear (252) is coaxially mounted on the top of the rotating ring (251); the first bevel gear (252) is meshedly connected with a second bevel gear (253) rotatably mounted on the upper side of the lifting platform (22); and a first rotary driver (254) for driving the second bevel gear (253) to rotate is fixedly mounted on the upper side of the lifting platform (22).

7. The bicycle accessory punching device with a buffer structure according to claim 2, characterized in that: The bracket (1) is provided with a horizontally extending material discharge hole (111), the bottom mold (4) has two, the outer modules (41) of the two bottom molds (4) are connected by a horizontal connecting plate (44) and slidably installed in a limiting slide groove (112), and limiting baffles (113) are provided at both ends of the limiting slide groove (112), a second linear driver (114) is fixedly installed on one of the limiting baffles (113), and the working end of the second linear driver (114) moves along the length direction of the limiting slide groove (112), and the working end of the second linear driver (114) is connected to one of the bottom molds (4); When the second linear drive (114) drives one of the bottom molds (4) to move to fit the limit baffle (113) on one side, the second forming hole (431) of the bottom mold (4) on the other side and the forming hole (31) of the upper mold (3) are located on the same straight line.

8. The bicycle accessory punching device with a buffer structure according to claim 7, characterized in that: The outer module (41) is provided with a center hole (411), the lifting shaft mold (42) is installed in the center hole (411), the inner mold core (43) is located at the axis of the lifting shaft mold (42), and a blanking sleeve (432) is provided at the bottom of the inner mold core (43), and the blanking sleeve (432) is attached to the upper surface of the support platform (11). The lifting shaft mold (42) is provided with a side groove (421) surrounding the outer wall of the lifting shaft mold (42), and a plurality of push rods (422) extending vertically downward are provided at the top of the side groove (421), and the push rods (422) are attached to the surface of the support platform (11). The lifting shaft mold (42) and the top of the inner mold core (43) are spliced ​​to form a model of a bowl set cover for stamping; A sinking groove (115) is provided on the upper side of the support platform (11), and the sinking groove (115) extends from the central part of the support platform (11) to the limit baffle (113) along the moving path of the top rod (422), and the surface of the sinking groove (115) is lower than the surface of the support platform (11); The diameter of the blanking sleeve (432) is greater than the diameter of the ejector rod (422), and the diameter of the inner mold core (43) is smaller than the diameter of the bowl assembly cover.

9. The bicycle accessory punching device with a buffer structure according to claim 8, characterized in that: An inner limit ring (412) surrounding the inner wall is arranged on the outer module (41) of the bottom mold (4); the inner limit ring (412) is located in the side groove (421) of the lifting shaft mold (42); an elastic member (423) is sleeved on the top rod (422); the elastic member (423) elastically connects the bottom surface of the side groove (421) and the bottom surface of the inner limit ring (412); the elastic member (423) applies a downward elastic force to the lifting shaft mold (42).

10. A method for stamping bicycle parts with a buffer structure, applied to the stamping device for bicycle parts with a buffer structure as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Place the material to be stamped into the bottom die (4), and move the bottom die (4) below the stamping assembly (2); Step 2: The first linear drive (21) is started to drive the lifting platform (22) and the upper mold (3) to move downward, and the material in the bottom mold (4) is punched; Step 3: After the punching is completed, the upper die (3) is fixed in position, and the first linear drive (21) drives the lifting platform (22) to continue to move downward so that the punching rod (24) punches holes in the bowl set cover; Step 4: The punching rod (24) is inserted into the forming hole (31), and the rotation drive unit (25) drives the punching rod (24) to rotate to grind and remove burrs on the punching part of the bowl set cover.

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