Punching device and forming machining process for web plate

Abstract

The application provides a punching device and forming machining process of a bent spoke plate, and belongs to the technical field of agricultural vehicle wheel accessory machining. The punching device of the bent spoke plate comprises a support frame, a punching seat and a punching head. A stabilizing plate is slidably installed on the support frame, and the stabilizing plate is linked with the punching seat through a connecting assembly. An arc-shaped frame is installed on the support frame, and the arc-shaped frame is linked with the punching seat through a force storage assembly. In the above scheme, the punching device and forming machining process of the bent spoke plate are provided with the connecting assembly and the force storage assembly, so that the stabilizing plate can clamp and position the bent spoke plate, and a corresponding support is formed on the inner side of the bent spoke plate, thereby achieving multi-point support and limiting of the inner and outer sides of the bent spoke plate, which is beneficial to reducing the deformation of the hole position and the overall deformation of the workpiece, and reducing the workload and processing difficulty of subsequent shaping. The arc-shaped frame continuously stores force during the punching process, and can apply a pushing force to the bent spoke plate after the punching of all the ventilation holes is completed, thereby achieving auxiliary unloading.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery wheel parts processing technology, and in particular to a punching device and forming process for curved spokes. Background Technology

[0002] Curved spokes are an important component of agricultural machinery wheels. During their processing, punching ventilation holes is one of the key steps. This step is usually completed using a punching device for curved spokes. The common method for punching ventilation holes in curved spokes is as follows: the semi-finished curved spokes that have undergone flanging are placed on a chuck that is tilted on the press. The protruding limiting post on the chuck passes through the mounting hole and the center hole of the semi-finished curved spokes to achieve workpiece positioning and limiting. The equipment relies on a hydraulic mechanism to drive the punching head to press down vertically to complete the punching of ventilation holes.

[0003] The existing ventilation hole processing device relies solely on limiting posts to limit the semi-finished curved spokes. Even when a stamping pad is in contact with the semi-finished curved spokes during the stamping process, the impact force of the stamping head still causes collisions and pulling between the mounting holes and center holes on the semi-finished curved spokes and the limiting posts on the chuck. This easily leads to deformation of the mounting holes and center holes, resulting in difficulty in unloading the curved spokes. In the existing ventilation hole processing device, the punching and unloading processes are two independent processes with no linkage and require separate control; the stamping process and spoke clamping are also independent processes with no linkage and require separate control, affecting the overall processing efficiency. Summary of the Invention

[0004] This invention provides a punching device and forming process for curved spokes, to solve the technical problems of existing technology where, when punching air holes in curved spokes, the single limiting of the curved spokes causes deformation of the semi-finished curved spokes after punching, which increases the difficulty of subsequent shaping processes and makes unloading inconvenient; the punching process and the unloading process are two independent processes with no linkage, requiring separate control, which affects the overall processing efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] On one hand, a punching device for a curved spoke plate includes a support frame and a punching seat. A punching head is installed on the punching seat. A chuck is rotatably provided on one side of the support frame. A motor is installed on the support frame. The output end of the motor is connected to the chuck. A limiting post is provided on the chuck. The center hole of the curved spoke plate is fitted onto the limiting post.

[0007] A stabilizing plate is slidably mounted on the support frame. The stabilizing plate and the stamping seat are linked by a connecting component. When the stamping seat moves toward or away from the curved spoke, the stabilizing plate moves toward or away from the curved spoke, thereby clamping or releasing the curved spoke.

[0008] An arc-shaped frame is installed on the support frame. The arc-shaped frame is an elastic component. The arc-shaped frame and the stamping seat are linked through a power storage component. The elastic deformation of the arc-shaped frame gradually increases with the number of times the stamping seat moves toward the curved spoke plate. The mounting hole of the curved spoke plate is stamped by the stamping head, and the arc-shaped frame pushes the curved spoke plate outward.

[0009] Optionally, the connecting assembly includes a connecting rod 1 hinged to both sides of the bottom of the stamping seat, and a connecting rod 2 hinged to the end of the connecting rod 1 away from the stamping seat. The end of the connecting rod 2 away from the connecting rod 1 is respectively hinged to the two stabilizing plates.

[0010] Optionally, connecting frames are provided on both sides of the support frame, and an auxiliary frame is provided on one side of the stabilizing plate through the connecting frame. A sliding groove is provided on one side of each of the two connecting frames, and a slider slides in the sliding groove. One side of the slider is connected to the stabilizing plate, and the other side of the slider is connected to the auxiliary frame.

[0011] Optionally, the energy storage component includes a pressure-bearing airbag located in the slide groove near the support frame. The pressure-bearing airbag abuts against one side of the slider. A mounting groove is also provided on one side of the connecting frame. An energy storage airbag is provided in the mounting groove. The energy storage airbag and the pressure-bearing airbag are connected and communicate with each other. A pusher is slidably provided in the mounting groove. One side of the pusher abuts against one side of the energy storage airbag, and the other side of the pusher is connected to the arc-shaped frame.

[0012] Optionally, a pushing part is provided on one side of the arc-shaped frame. The cross-section of the pushing part is arc-shaped, and the arc direction of the pushing part is opposite to the arc direction of the arc-shaped frame.

[0013] Optionally, the auxiliary frame includes a fixing part connected to the slider. One end of the fixing part is provided with an upper connecting part and an abutting part in sequence. The abutting part has an arc-shaped cross-section. The other end of the fixing part is provided with a lower connecting part and a receiving part in sequence. The abutting part has an arc-shaped cross-section.

[0014] Optionally, the support frame is provided with a guide rail on the side near the motor, the number of guide rails corresponding to the number of auxiliary frames, and the upper connecting part is slidably connected to the guide rail.

[0015] Optionally, the bottom of the stabilizing plate is provided with an adjustment groove, and an adjustment block is slidably disposed in the adjustment groove, the bottom of the adjustment block being connected to the top of the slider.

[0016] Optionally, the top of the adjusting block is provided with a plurality of adjusting holes at equal intervals, and the top of the stabilizing plate is provided with adjusting bolts, which pass through the stabilizing plate and are threadedly connected to one of the adjusting holes.

[0017] On the other hand, a forming process for a curved spoke plate, wherein the forming process employs the punching device for the curved spoke plate, and the forming process includes the following steps:

[0018] Step 1: Prepare the curved spoke blank, and perform leveling, degreasing, rust removal and lubrication pretreatment on the blank;

[0019] Step 2: Stretch the curved spoke blank to form the curved spoke profile part;

[0020] Step 3: Punch mounting holes and center holes on the curved spoke profile and perform edge flanging to produce a semi-finished curved spoke.

[0021] Step 4: Transfer the semi-finished curved spoke plate to the punching device station of the curved spoke plate, and use the punching device of the curved spoke plate to punch the ventilation holes of the curved spoke plate to make the semi-finished curved spoke plate.

[0022] Step 5: Shape and surface-treat the semi-finished curved spokes to obtain the finished curved spokes.

[0023] Step 6: Inspect the formed curved spokes and put them into storage.

[0024] The beneficial effects of the above-described technical solution of the present invention are as follows:

[0025] In the above scheme, by setting up connecting components and power storage components, when the punching head and punching pad are used to perform punching operations, the stabilizing plate can clamp and position the curved spoke from both sides. At the same time, the auxiliary frame forms a corresponding support on the inner side of the curved spoke, realizing multi-point support and limitation of the curved spoke workpiece inside and outside, which enhances the stability of the punching operation of the vent holes of the curved spoke, effectively distributes the punching load, and weakens the collision and pulling force between the mounting holes and center holes of the curved spoke and the chuck limiting post during the punching and rotation process. This helps to reduce the deformation of the hole and the overall deformation of the workpiece, thereby reducing the workload and processing difficulty of the subsequent forming of the curved spoke workpiece. At the same time, the arc frame continuously stores power during the punching operation. After all the ventilation holes of a curved spoke are punched, a pushing force can be applied to the curved spoke, which, together with the chuck, realizes the auxiliary unloading of the curved spoke, shortens the time for picking up and putting down the curved spoke, and helps to improve the processing efficiency of the curved spoke.

[0026] By setting up a pressure-bearing airbag, a accumulating airbag, a pusher plate, and an arc-shaped frame, in conjunction with a stabilizing plate, the accumulating airbag can continuously store force. After all the ventilation holes of a curved spoke are punched, the arc-shaped frame can apply a pushing force to the curved spoke, and in conjunction with the chuck, the curved spoke can be unloaded, shortening the time for picking up and putting down the curved spoke and improving the processing efficiency of the curved spoke.

[0027] By setting a pushing part that is opposite to the curvature of the curved frame, the contact area with the bottom edge of the curved spoke forming semi-finished product can be increased when pushing the bottom edge of the curved spoke forming semi-finished product for unloading. This not only helps to ensure the stability during the pushing process, but also reduces damage to the bottom edge of the curved spoke forming semi-finished product.

[0028] By setting up a receiving part, the receiving part can play a supporting role during unloading, preventing the semi-finished product of the bent spoke plate from slipping off, and ensuring the safety and stability of unloading. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the punching device for the curved spoke plate of the present invention;

[0030] Figure 2 This is a schematic diagram of the cooperative structure of the support frame, chuck, connecting frame, and auxiliary frame of the present invention. Figure 1 ;

[0031] Figure 3 This is a schematic diagram of the internal slider, pressure-bearing airbag, energy-storing airbag, arc frame, and auxiliary frame of the connecting frame of the present invention.

[0032] Figure 4 This is a partial side-section diagram of the stabilizing plate, connecting frame, support frame and first type of curved spoke plate of the present invention;

[0033] Figure 5 This is an exploded view of the stabilizing plate, slider, and adjusting block of the present invention.

[0034] Figure 6 This is a schematic diagram of the stabilizing plate and the first type of curved spoke plate of the present invention.

[0035] Figure 7 This is an enlarged schematic diagram of the auxiliary frame, slider, and adjustment block of the present invention.

[0036] Figure 8 This is a schematic diagram of the auxiliary frame and the first type of curved spoke plate of the present invention.

[0037] Figure 9 This is a schematic diagram of the cooperative structure of the support frame, chuck, connecting frame, and auxiliary frame of the present invention. Figure 2 ;

[0038] Figure 10 This is a schematic diagram of the stabilizing plate and the second type of curved spoke plate of the present invention.

[0039] Figure 11 This is a side sectional view of the auxiliary frame and the second type of curved spokes of the present invention.

[0040] [Figure Labels]

[0041] 1. Mounting base; 2. Support frame; 3. Chuck; 4. Motor; 5. Stamping base; 6. Stamping pad; 7. Connecting rod one; 8. Connecting rod two; 9. Connecting frame; 10. Stabilizing plate; 11. Guide rail; 12. Auxiliary frame; 13. Slide groove; 14. Slider; 15. Adjusting bolt; 16. Pressure-bearing airbag; 17. Mounting groove; 18. Energy-accumulating airbag; 19. Push plate; 20. Arc frame; 21. Pushing part; 22. Adjusting block; 23. Adjusting hole; 24. Adjusting groove; 25. Fixing part; 26. Upper connecting part; 27. Abutting part; 28. Lower connecting part; 29. ​​Receiving part; 30. Stamping head; 31. Curved spoke plate forming semi-finished product. Detailed Implementation

[0042] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figures 1 to 8As shown, an embodiment of the present invention provides a punching device for a curved spoke plate, comprising a support frame 2 and a punching seat 5. The support frame 2 is mounted on a mounting base 1, which is mounted on the operating table of a hydraulic press. The punching seat 5 is mounted on the punching section of the hydraulic press. When the hydraulic press is started, the punching seat 5 can move downwards to perform the punching operation. The specific structure and operating principle of the hydraulic press are mature technologies in the field and are disclosed as prior art, so they will not be described in detail here. The support frame 2 is mounted on the mounting base 1, and a punching head 30 is mounted on the punching seat 5. A punching pad 6 is provided at the bottom of the punching seat 5. The punching pad 6 is located on the outside of the punching head 30 and is made of elastic material. When the punching head 30 performs the punching operation, the elastic punching pad 6 can play a buffering role. A chuck 3 is rotatably provided on one side of the support frame 2. It can be understood that the part of the support frame 2 that mounts the chuck 3 is inclined. A motor 4 is installed on the support frame 2. The output end of the motor 4 is connected to the chuck 3. The chuck 3 is equipped with a limiting post, and the center hole of the curved spoke plate is fitted onto the limiting post. A stabilizing plate 10 is slidably installed on the support frame 2. The stabilizing plate 10 and the stamping seat 5 are linked through a connecting component. When the stamping seat 5 moves toward or away from the curved spoke plate, the stabilizing plate 10 moves toward or away from the curved spoke plate, so that the stabilizing plate 10 can clamp or release the curved spoke plate. An arc-shaped frame 20 is installed on the support frame 2. The arc-shaped frame 20 is an elastic component. The arc-shaped frame 20 and the stamping seat 5 are linked through a force storage component. The elastic deformation of the arc-shaped frame 20 gradually accumulates with the number of times the stamping seat 5 moves toward the curved spoke plate. The mounting hole of the curved spoke plate is completed by the stamping head 30, and the arc-shaped frame 20 pushes the curved spoke plate outward.

[0045] When punching ventilation holes in the curved spoke plate, the semi-finished curved spoke plate with the flanged edge is placed on the inclined support frame 2 and chuck 3. The limiting pin on the chuck 3 passes through the center hole and the mounting hole of the semi-finished curved spoke plate to complete the initial positioning. Then, the hydraulic press is started to drive the stamping seat 5 to move downward, which drives the stamping head 30 covered by the stamping pad 6 to press down synchronously, and the ventilation holes of the semi-finished curved spoke plate are punched. Both sides of the support frame 2 are provided with connecting frames 9. One side of the stabilizing plate 10 passes through the connecting frame 9 and is provided with an auxiliary frame 12. Under the action of the connecting components, when the stamping seat 5 is pressed down, it will simultaneously drive the stabilizing plates 10 on both sides to slide towards each other along the connecting frame 9, forming a clamping limit from both sides of the curved spoke semi-finished product. When the two stabilizing plates 10 approach each other, they will simultaneously drive the auxiliary frame 12 to move closer to each other. The end of the auxiliary frame 12 abuts against the inner side of the position to be stamped on the curved spoke semi-finished product, forming a two-way multi-point support with the outer stamping pad 6, which enhances the stability of the punching operation of the curved spoke air hole, effectively distributes the stamping load, and weakens the collision and pulling force between the curved spoke mounting hole, center hole and chuck limiting post during the stamping and rotation process. This is conducive to reducing the deformation of the hole and the overall deformation of the workpiece, thereby reducing the workload and processing difficulty of the subsequent forming of the curved spoke workpiece. After single-hole punching is completed, the punching seat 5 resets, and the stabilizing plate 10 and auxiliary frame 12 also loosen. Then, the motor 4 is started to drive the chuck 3 to rotate the curved spoke plate semi-finished product at a set angle, switching to the next punching station. The above punching and clamping actions are repeated to complete the punching of all ventilation holes in sequence. Under the force storage of the force storage component, the auxiliary frame 12 will push the arc frame 20 to complete one force storage during each punching process. When all ventilation holes are punched, the curved spoke plate semi-finished product 31 is formed. The force-storing arc frame 20 will apply a pushing force to the curved spoke plate semi-finished product 31. Combined with the tilting setting of the chuck 3, the curved spoke plate semi-finished product 31 can be smoothly pushed out, which plays a role in assisting unloading and shortens the time for picking up and putting down the curved spoke plate semi-finished product 31, which is conducive to improving the processing efficiency of the curved spoke plate. At this time, the end of the auxiliary frame 12 away from the punching pad 6 will support the curved spoke plate semi-finished product 31 during unloading, which helps to ensure the safety and stability of the curved spoke plate semi-finished product 31 during unloading.

[0046] like Figures 1 to 3As shown, the connecting assembly includes connecting rod 7 connected to both sides of the bottom of the stamping seat 5. Connecting rod 8 is hinged to the end of connecting rod 7 away from the stamping seat 5. The end of connecting rod 8 away from connecting rod 7 is hinged to two stabilizing plates 10. The stabilizing plates 10 are slidably mounted on the connecting frame 9. When performing the air hole punching operation, the hydraulic press is started to drive the stamping seat 5 downwards. The connecting rod 7 hinged to both sides of the bottom of the stamping seat 5 is pressed down accordingly, and the connecting rod 8 hinged to it pushes the two stabilizing plates 10 to slide towards each other along the connecting frame 9, so that the two stabilizing plates 10 move closer to each other until they clamp the curved spoke plate semi-finished product from both sides. At the same time, the auxiliary frame 12 moves closer and abuts against the inner side of the curved spoke plate semi-finished product to be punched, completing the clamping, limiting, and inner support actions. The punching operation is completed with the stamping pad 6 and the stamping head 30. After the single hole is punched, the hydraulic stamping mechanism drives the stamping seat 5 to reset upward. The connecting rod 1 7 moves upward with the stamping seat and pulls the connecting rod 2 8 and the two side stabilizing plates 10 to slide back and forth along the connecting frame 9, gradually loosening and releasing the lateral clamping and inner support of the curved spoke semi-finished product.

[0047] like Figures 2 to 4 As shown, a groove 13 is provided on one side of the connecting frame 9, and a slider 14 slides in the groove 13. One side of the slider 14 is connected to the stabilizing plate 10, and the other side of the slider 14 is connected to the auxiliary frame 12. When the stamping seat 5 moves downward, driven by the connecting rod 7 and the connecting rod 8, and with the connecting action of the slider 14 and the guiding action of the groove 13, the two stabilizing plates 10 will move towards each other. At this time, the slider 14 will slide synchronously in the groove 13, and at the same time, it will drive the auxiliary frame 12 on the other side of the slider 14 to move closer to the center of the bent spoke plate semi-finished product. This not only achieves the stabilizing plate 10 clamping the bent spoke plate semi-finished product from both sides, but also makes one end of the auxiliary frame 12 abut against the inner side of the position to be punched on the bent spoke plate semi-finished product, forming a two-way support with the outer stamping pad 6, ensuring the stability of the bent spoke plate semi-finished product during punching. At the same time, as the slider 14 slides in the groove 13, it will gradually cause the auxiliary frame 12 to complete the accumulation of force.

[0048] like Figure 3 and Figure 4As shown, the energy storage assembly includes a pressure-bearing airbag 16, which is located in the slide groove 13 near the support frame 2. The pressure-bearing airbag 16 abuts against one side of the slider 14. A mounting groove 17 is also provided on one side of the connecting frame 9, and an energy storage airbag 18 is provided in the mounting groove 17. The energy storage airbag 18 and the pressure-bearing airbag 16 are connected and communicate with each other. A push plate 19 is slidably provided in the mounting groove 17. One side of the push plate 19 abuts against one side of the energy storage airbag 18, and the other side of the push plate 19 is connected to the arc-shaped frame 20. As mentioned above, when the stamping seat 5 moves downward, driven by connecting rod 7 and connecting rod 8, and connected by slider 14 and guided by slide groove 13, the two side stabilizing plates 10 will move towards each other. At this time, slider 14 will slide synchronously in slide groove 13, and at the same time, it will drive the auxiliary frame 12 on the other side of slider 14 to move towards the center of the bent spoke semi-finished product. At this time, slider 14 will squeeze the pressure airbag 16 in slide groove 13. After being squeezed, the internal air pressure of pressure airbag 16 increases. Since it is connected to the accumulator airbag 18, the high pressure gas will surge into the accumulator airbag 18 synchronously. Understandably, a one-way valve is provided between the accumulator airbag 18 and the pressure-receiving airbag 16, so that each punching of the stamping head 30 and each sliding of the slider 14 will complete a single air pressure accumulation of the accumulator airbag 18, causing the accumulator airbag 18 to gradually expand and elongate. The expanded accumulator airbag 18 will gradually push the pusher plate 19 in the mounting groove 17 to slide outward, thereby driving the arc-shaped frame 20 at the end of the pusher plate 19 to approach the bottom edge of the curved spoke plate forming semi-finished product 31. After all the ventilation holes of the curved spoke plate semi-finished product are punched, the arc-shaped frame 20 abuts against the bottom edge of the curved spoke plate forming semi-finished product 31. To compensate for the distance between the arc-shaped frame 20 and the bottom edge of the curved spoke semi-finished product 31, the hydraulic stamping mechanism can drive the stamping head 30 to press down a short distance. This causes the accumulator 18 to push the pusher 19 and its upper arc-shaped frame 20 to apply a pushing force to the bottom edge of the curved spoke semi-finished product 31. Combined with the inclined chuck 3, the curved spoke semi-finished product 31 can be smoothly pushed out of the chuck 3, completing the auxiliary unloading. Furthermore, the accumulator 18 is equipped with a pressure relief valve, which releases pressure and air after one push unloading operation, preparing for the next accumulator operation.

[0049] It should be noted that the volume ratio between the accumulator airbag 18 and the pressure-bearing airbag 16 can be set according to processing needs during production and assembly. The specific calculation and setting method is disclosed as prior art and will not be specifically limited or elaborated here.

[0050] like Figure 4As shown, a pushing part 21 is provided on one side of the arc frame 20. The cross-section of the pushing part 21 is arc-shaped, and the arc direction of the pushing part 21 is opposite to the arc direction of the arc frame 20. When the pushing part 21, which is opposite to the arc direction of the arc frame 20, pushes the bottom edge of the curved spoke forming semi-finished product 31 to unload, it can increase the contact area with the bottom edge of the curved spoke forming semi-finished product 31. This is beneficial to ensure the stability during pushing and can also reduce the damage to the bottom edge of the curved spoke forming semi-finished product 31.

[0051] like Figure 7 and Figure 8 As shown, the auxiliary frame 12 includes a fixing part 25, which is connected to the slider 14. One end of the fixing part 25 is provided with an upper connecting part 26 and an abutment part 27 in sequence. The abutment part 27 has an arc-shaped cross-section. The other end of the fixing part 25 is provided with a lower connecting part 28 and a receiving part 29 in sequence. When the slider 14 slides, the fixing part 25 moves accordingly. Through the transmission of the upper connecting part 26, the arc-shaped abutment part 27 fits against the inner side of the punching position of the curved spoke semi-finished product, forming an inner and outer top-to-top support with the outer stamping pad 6, sharing the stamping load. After a single punching is completed, the stamping seat 5 moves upward to reset, and the slider 14 drives the auxiliary frame 12 to retract, so that the abutment part 27 disengages from the inner side of the punching position of the curved spoke semi-finished product, without interfering with the rotation of the chuck 3 and the curved spoke semi-finished product on it. After all ventilation holes are punched, the lower receiving part 29, connected to the lower connecting part 28, is located below the curved spoke plate semi-finished product. When the arc frame 20 and the pushing part 21 work together to apply the pushing force to achieve auxiliary unloading, the receiving part 29 plays a supporting role, preventing the curved spoke plate semi-finished product 31 from slipping and ensuring the safety and stability of unloading.

[0052] like Figure 2 , Figure 3 , Figure 7 As shown in Figure 8, the support frame 2 has a guide rail 11 on the side near the motor 4. The number of guide rails 11 corresponds to the number of auxiliary frames 12. The upper connecting part 26 is slidably connected to the guide rail 11. The guide rail 11 provides guidance for the sliding of the upper connecting part 26, so that when the slider 14 slides, under the guidance of the guide rail 11, the upper connecting part 26 can push the arc-shaped abutment part 27 to fit against the inner side of the punching hole position of the curved spoke semi-finished product, forming an inner and outer top support with the outer stamping pad 6, sharing the stamping load. When the stamping seat 5 moves upward to reset, the slider 14 drives the auxiliary frame 12 to retract. Under the guidance of the guide rail 11, the upper connecting part 26 drives the abutment part 27 away from the inner side of the punching hole position of the curved spoke semi-finished product, so as not to interfere with the rotation of the chuck 3 and the curved spoke semi-finished product on it.

[0053] like Figures 5 to 7As shown, the bottom of the stabilizing plate 10 has an adjustment groove 24, and an adjustment block 22 is slidably disposed within the adjustment groove 24. The bottom of the adjustment block 22 is connected to the top of the slider 14. Multiple adjustment holes 23 are equidistantly distributed on the top of the adjustment block 22. An adjustment bolt 15 is provided on the top of the stabilizing plate 10, and the adjustment bolt 15 passes through the stabilizing plate 10 and is threadedly connected to one of the adjustment holes 23. The adjustment block 22 can slide along the adjustment groove 24 at the bottom of the stabilizing plate 10, thereby changing the relative distance between the slider 14 and the stabilizing plate 10. The threaded connection of the adjustment bolt 15 to the corresponding adjustment hole 23 achieves the limiting and fixing of the stabilizing plate 10 and the slider 14, ensuring the connection stability of the stabilizing plate 10 and its auxiliary frame 12 during movement. By adjusting the relative position of the slider 14 and the stabilizing plate 10, the degree of compression of the pressure bag 16 by the slider 14 during sliding can be changed, thereby adjusting the pressure and air intake of the pressure bag 16 during a single punching process, achieving controllable adjustment of the single-charge capacity. For curved spokes with varying numbers of ventilation holes, the power storage rate and total power storage limit can be adjusted. Specifically, for workpieces with many ventilation holes, the single extrusion pressure can be reduced to achieve low-amplitude, high-frequency power storage; for workpieces with fewer ventilation holes, the single extrusion pressure can be increased, requiring fewer stamping passes to achieve the necessary thrust for unloading. This ensures the power storage frequency matches the number of holes required for the curved spoke. The curved spoke semi-finished product 31 in Example 1 is a mature and widely used first-type curved spoke.

[0054] Example 2

[0055] This embodiment provides a bending spoke forming process, which uses the bending spoke punching device in Embodiment 1, and includes the following steps:

[0056] Step 1: Prepare the curved spoke blank, and perform leveling, degreasing, rust removal and lubrication pretreatment on the blank;

[0057] Step 2: Stretch the curved spoke blank to form the curved spoke profile part;

[0058] Step 3: Punch mounting holes and center holes on the curved spoke profile and perform edge flanging. Then, cold press to form a semi-finished curved spoke.

[0059] Step 4: Transfer the semi-finished curved spoke plate to the punching device station of the curved spoke plate, and use the punching device of the curved spoke plate to punch the ventilation holes of the curved spoke plate to make the semi-finished curved spoke plate.

[0060] Step 5: Shape and surface-treat the semi-finished curved spokes to obtain the finished curved spokes.

[0061] Step 6: Inspect the formed curved spokes and put them into storage.

[0062] Example 3

[0063] Based on Embodiment 1, the punching device for the curved spoke plate provided in this embodiment differs from that in Embodiment 1 in that, for example... Figures 9 to 11 As shown, the chuck 3 and the connecting frame 9 are both horizontally arranged. In this embodiment, the curved spoke plate forming semi-finished product 31 is a second type of curved spoke plate, namely a curved spoke plate used for agricultural machinery wheels. At this time, a support frame 2 with the same horizontal top can be selected to support the chuck 3 according to actual processing requirements, and a stabilizing plate 10 with an L-shaped cross section can be selected to fit with the surface of the curved spoke plate to be processed. In use, the flange of the semi-finished curved spoke plate is completed according to the steps described above. Then, the flanged semi-finished curved spoke plate is placed on the top horizontal support frame 2 and chuck 3. The limiting post on the chuck 3 passes through the center hole and the mounting hole of the semi-finished curved spoke plate to complete the initial positioning. Then, the hydraulic stamping mechanism drives the stamping seat 5 to move down, which drives the stamping head 30 covered by the stamping pad 6 to press down synchronously, and performs ventilation hole stamping on the semi-finished curved spoke plate. At the same time as the stamping seat 5 presses down, under the connection of the connecting rod 1 7 and the connecting rod 2 8, the stabilizing plates 10 on both sides will slide towards each other along the slide groove 13 on the connecting frame 9, forming a clamping limit from both sides of the semi-finished curved spoke plate. Under the connecting action of the slider 14, the auxiliary frame 12 is driven to move closer to each other. Under the guiding action of the guide rail 11, the arc-shaped abutment part 27 at the end of the auxiliary frame 12 fits against the inner side of the punching position of the semi-finished curved plate, forming a two-way multi-point support with the outer stamping pad 6. This enhances the stability of the punching operation of the curved plate air hole, effectively distributes the stamping load, and weakens the collision and pulling force between the mounting hole and center hole of the curved plate and the chuck limiting post during the stamping and rotation process. This helps to reduce the deformation of the hole and the overall deformation of the workpiece, thereby reducing the workload and processing difficulty of the subsequent forming of the curved plate workpiece.

[0064] After the single-hole punching in this embodiment is completed, the punching seat 5 is reset, and the stabilizing plate 10 and the auxiliary frame 12 are also released. Then, the motor 4 is started to drive the chuck 3 to rotate the curved spoke plate semi-finished product at a set angle and switch to the next punching station. The above punching and clamping actions are repeated to complete the punching of all ventilation holes in sequence. Each reciprocating slide of the stabilizing plate 10 will drive the slider 14 to squeeze the pressure airbag 16 in the slide groove 13, complete the single air pressure storage of the power storage airbag 18, so that the power storage airbag 18 gradually expands and elongates. The expanded power storage airbag 18 will gradually push the push plate 19 in the mounting groove 17 to slide outward, thereby driving the arc frame 20 at the end of the push plate 19 and its pushing part 21 to approach the bottom edge of the curved spoke plate semi-finished product 31. After all the ventilation holes of the curved spoke semi-finished product are stamped, the curved spoke semi-finished product 31 is formed. The arc frame 20 abuts against the bottom edge of the curved spoke semi-finished product 31. In order to compensate for the distance between the arc frame 20 and the bottom edge of the curved spoke semi-finished product 31, the hydraulic stamping mechanism can drive the stamping head 30 to press down a short distance, so that the accumulating air bag 18 pushes the push plate 19, the arc frame 20 and the pushing part 21 to apply a pushing force to the bottom edge of the curved spoke semi-finished product 31. This can help the curved spoke semi-finished product 31 to get off the chuck 3, realize the function of assisting unloading, shorten the time for picking up and putting down the curved spoke semi-finished product 31, and help improve the processing efficiency of the curved spoke. During unloading, the receiving part 29 plays a guiding role during unloading, so that the curved spoke semi-finished product 31 can be stably and smoothly released from the chuck 3.

[0065] Example 4

[0066] Based on Example 3, the forming process of the curved spoke plate provided by the present invention is as follows:

[0067] Step 1: Prepare the curved spoke blank, and perform leveling, degreasing, rust removal and lubrication pretreatment on the blank;

[0068] Step 2: Stretch the curved spoke blank to form the curved spoke profile part;

[0069] Step 3: Punch mounting holes and center holes on the curved spoke profile and perform edge flanging. Then, cold press to form a semi-finished curved spoke.

[0070] Step 4: Transfer the semi-finished curved spoke plate to the punching device station of the curved spoke plate. The punching device of the curved spoke plate performs punching processing of ventilation holes in the curved spoke plate to produce the semi-finished curved spoke plate 31.

[0071] During the ventilation hole punching process, the completed flanged curved spoke semi-finished product is placed on the inclined support frame 2 and chuck 3. The limiting post on the chuck 3 passes through the center hole and mounting hole of the curved spoke semi-finished product to complete the initial positioning. Then, the hydraulic press is started to drive the stamping seat 5 downward, which drives the stamping pad 6 and the stamping head 30 to press down simultaneously, performing ventilation hole punching on the curved spoke semi-finished product. At the same time as the stamping seat 5 presses down, under the connection of connecting rod 1 7 and connecting rod 2 8, the stabilizing plates 10 on both sides will slide towards each other along the slide groove 13 on the connecting frame 9, forming a clamping limit from both sides of the curved spoke semi-finished product. Under the connection of the slider 14, the auxiliary frame 12 will move closer to each other, and the guide rail 1 will be closed. Under the guidance of 1, the arc-shaped abutment part 27 at the end of the auxiliary frame 12 fits against the inner side of the punching position of the curved spoke plate semi-finished product, forming a two-way multi-point support with the outer stamping pad 6, which enhances the stability of the punching operation of the curved spoke plate air hole, effectively distributes the stamping load, and weakens the collision and pulling force between the curved spoke plate mounting hole, center hole and chuck limiting post during the stamping and rotation process. This helps to reduce hole deformation and overall workpiece deformation, thereby reducing the workload and processing difficulty of subsequent curved spoke plate forming workpiece shaping. After the single hole punching is completed, the stamping seat 5 is reset, and the stabilizing plate 10 and auxiliary frame 12 are also released. Then, the motor 4 is started to drive the chuck 3 to rotate the curved spoke plate semi-finished product. Set the angle, switch to the next punching station, and repeat the above punching and clamping actions to complete the punching of all ventilation holes in sequence. Each reciprocating slide of the stabilizing plate 10 will cause the slider 14 to squeeze the pressure-bearing airbag 16 in the slide groove 13, completing the single air pressure storage of the accumulating airbag 18, causing the accumulating airbag 18 to gradually expand and elongate. The expanded accumulating airbag 18 will gradually push the push plate 19 in the mounting groove 17 to slide outward, thereby causing the arc-shaped frame 20 at the end of the push plate 19 and its pushing part 21 to approach the bottom edge of the curved spoke plate forming semi-finished product 31. After all the ventilation holes of the curved spoke plate semi-finished product are punched, the curved spoke plate forming semi-finished product 31 is formed. The arc-shaped frame 20 and the curved spoke plate forming semi-finished product 31 are connected. The bottom edges of the two parts 1 abut against each other. In order to compensate for the distance between the bottom edge of the arc frame 20 and the bottom edge of the curved spoke plate forming semi-finished product 31, the hydraulic stamping mechanism can drive the stamping head 30 to press down a short distance, so that the accumulator air bag 18 pushes the push plate 19, the arc frame 20 and the push part 21 to apply a pushing force to the bottom edge of the curved spoke plate forming semi-finished product 31. Combined with the inclined chuck 3, the curved spoke plate forming semi-finished product 31 can be smoothly pushed out of the chuck 3, completing the auxiliary unloading, shortening the loading and unloading time of the curved spoke plate forming semi-finished product 31, which is conducive to improving the processing efficiency of the curved spoke plate. During unloading, the receiving part 29 plays a receiving role to prevent the curved spoke plate forming semi-finished product 31 from slipping, ensuring the safety and stability of unloading.

[0072] Step 5: Shape and surface-treat the semi-finished curved spoke plate 31 to obtain the shaped curved spoke plate;

[0073] Step 6: Inspect the formed curved spokes and put them into storage.

[0074] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A punching device for curved spokes, characterized in that, The device includes a support frame and a stamping base. A stamping head is installed on the stamping base. A chuck is rotatably provided on one side of the support frame. A motor is installed on the support frame. The output end of the motor is connected to the chuck. A limiting post is provided on the chuck. The center hole of the curved spoke plate is fitted onto the limiting post. A stabilizing plate is slidably mounted on the support frame. The stabilizing plate and the stamping seat are linked by a connecting component. When the stamping seat moves toward or away from the curved spoke, the stabilizing plate moves toward or away from the curved spoke, thereby clamping or releasing the curved spoke. An arc-shaped frame is installed on the support frame. The arc-shaped frame is an elastic component. The arc-shaped frame and the stamping seat are linked through a power storage component. The elastic deformation of the arc-shaped frame gradually increases with the number of times the stamping seat moves toward the curved spoke plate. The mounting hole of the curved spoke plate is stamped by the stamping head, and the arc-shaped frame pushes the curved spoke plate outward.

2. The punching device for the curved spoke plate according to claim 1, characterized in that, The connecting assembly includes a connecting rod 1 connected to both sides of the bottom of the stamping seat. The end of the connecting rod 1 away from the stamping seat is hinged to a connecting rod 2. The end of the connecting rod 2 away from the connecting rod 1 is respectively hinged to the two stabilizing plates.

3. The punching device for the curved spoke plate according to claim 1, characterized in that, The support frame has connecting frames on both sides. An auxiliary frame is provided on one side of the stabilizing plate through the connecting frame. A sliding groove is opened on one side of each of the two connecting frames. A slider slides in the sliding groove. One side of the slider is connected to the stabilizing plate, and the other side of the slider is connected to the auxiliary frame.

4. The punching device for the curved spoke plate according to claim 3, characterized in that, The energy storage component includes a pressure-bearing airbag located in the slide groove near the support frame. The pressure-bearing airbag abuts against one side of the slider. A mounting groove is also provided on one side of the connecting frame, and an energy storage airbag is provided in the mounting groove. The energy storage airbag and the pressure-bearing airbag are connected and communicate with each other. A push plate is slidably provided in the mounting groove. One side of the push plate abuts against one side of the energy storage airbag, and the other side of the push plate is connected to the arc-shaped frame.

5. The punching device for the curved spoke plate according to claim 4, characterized in that, The arc-shaped frame has a pushing part on one side. The cross-section of the pushing part is arc-shaped, and the arc direction of the pushing part is opposite to the arc direction of the arc-shaped frame.

6. The punching device for the curved spoke plate according to claim 3, characterized in that, The auxiliary frame includes a fixing part, which is connected to the slider. One end of the fixing part is provided with an upper connecting part and an abutting part in sequence, and the other end of the fixing part is provided with a lower connecting part and a receiving part in sequence. The abutting part has an arc-shaped cross-section.

7. The punching device for the curved spoke plate according to claim 6, characterized in that, The support frame is provided with a guide rail on the side near the motor. The number of guide rails corresponds to the number of auxiliary frames. The upper connecting part is slidably connected to the guide rail.

8. The punching device for the curved spoke plate according to claim 6, characterized in that, The bottom of the stabilizing plate is provided with an adjustment groove, and an adjustment block is slidably disposed in the adjustment groove. The bottom of the adjustment block is connected to the top of the slider.

9. The punching device for the curved spoke plate according to claim 8, characterized in that, The top of the adjusting block has multiple adjusting holes at equal intervals, and the top of the stabilizing plate has adjusting bolts. The adjusting bolts pass through the stabilizing plate and are threadedly connected to one of the adjusting holes.

10. A forming process for a curved spoke plate, wherein the forming process employs the punching device for the curved spoke plate as described in any one of claims 1-9, characterized in that, The forming process includes the following steps: Step 1: Prepare the curved spoke blank, and perform leveling, degreasing, rust removal and lubrication pretreatment on the blank; Step 2: Stretch the curved spoke blank to form the curved spoke profile part; Step 3: Punch mounting holes and center holes on the curved spoke profile and perform edge flanging to produce a semi-finished curved spoke. Step 4: Transfer the semi-finished curved spoke plate to the punching device station of the curved spoke plate, and use the punching device of the curved spoke plate to punch the ventilation holes of the curved spoke plate to make the semi-finished curved spoke plate. Step 5: Shape and surface-treat the semi-finished curved spokes to obtain the finished curved spokes. Step 6: Inspect the formed curved spokes and put them into storage.

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