Bending device for steel machining

Abstract

The invention provides a bending device for steel machining, and relates to the technical field of metal plate machining, the bending device comprises a hydraulic plate bending machine body and an upper die, a lower die plate is fixedly installed on the hydraulic plate bending machine body, a bending groove is formed in the middle of the top face of the lower die plate, and two movable plates are installed on the lower die plate; the two movable plates are located on the two sides of the bending groove correspondingly, clamping plates are installed on the top faces of the two movable plates in a sliding mode, and the two clamping plates are arranged in parallel. According to the bending device for steel machining, through the arrangement of the hydraulic plate bending machine body, the upper die, the lower die plate, the movable plate, the clamping plate, a constant force driving structure and a positioning structure, when a metal plate is bent, an operator does not need to manually support the metal plate, accidents are reduced, and the working efficiency is improved. And meanwhile, the effect of limiting the position of the metal plate in the bending machining process is achieved, the situation that the metal plate shifts in the bending process is reduced, and the bending machining quality of the metal plate is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of metal plate processing, and in particular to a bending device for steel processing. Background Art

[0002] Steel is a material that is formed into a specific shape, size, and properties by forming ingots, billets, or other materials through pressure processing. Most steel processing involves plastic deformation of the steel (billets, ingots, etc.), such as the bending of steel plates and steel pipes.

[0003] When the current hydraulic sheet metal bending machine is used to bend steel plates, most small and medium-sized enterprises still rely on staff to manually place the sheet metal on the bending machine and hold it, and the hydraulic system drives the upper die to rest against the sheet metal. At this time, the sheet metal is pressed tightly and the staff can release their hands. However, once the hydraulic system fails, it is likely to cause the operator to be injured. For example, the upper die descends too fast, causing the sheet metal to bend quickly, and the operator's hands cannot be released in time. The bent side of the quickly bent sheet metal will also move quickly. The quickly moving sheet metal will impact the operator's hands and cause injuries to the operator. When holding the sheet metal with the hands, the operator may be crushed because of the wrong position of the support. In addition, many operators keep holding the sheet metal with their hands in order to improve work efficiency during the bending process, which undoubtedly increases the probability of injury to the operator. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a bending device for steel processing.

[0005] The present invention provides a bending device for steel processing, comprising a hydraulic sheet metal bending machine body and an upper die, wherein a lower die plate is fixedly mounted on the hydraulic sheet metal bending machine body, a bending groove is provided in the middle of the top surface of the lower die plate, two movable plates are mounted on the lower die plate, the two movable plates are respectively located on both sides of the bending groove, clamping plates are slidably mounted on the top surfaces of the two movable plates, the two clamping plates are arranged parallel to each other, the distance between the two clamping plates can be adjusted, the two clamping plates are used to clamp the position of the fixed sheet metal on the movable plate, a constant force driving structure is installed on the movable plate, the constant force driving structure is used to drive the clamping plates to slide on the movable plate, and the force exerted by the constant force driving structure on the clamping plates remains constant;

[0006] The movable plate is also provided with a positioning structure, which is used to fix the position of the clamping plate on the movable plate. The upper die is slidably mounted on the main body of the hydraulic sheet metal bending machine, and the upper die is located directly above the bending groove.

[0007] When the sheet material is placed on the two movable plates, the upper die descends and abuts against the sheet material, and the sheet material abuts against the two movable plates and drives the positioning structure to fix the position of the clamping plate on the movable plates.

[0008] Preferably, the constant force driving structure includes a slider and a constant force spring; the slider is fixedly connected to the bottom of the clamping plate, the movable plate is provided with a driving slot that slides with the slider, the inner wall of the end of the driving slot is provided with a rotating slot, the inner ring end of the constant force spring is fixedly installed in the rotating slot, the outer ring end of the constant force spring is fixedly connected to the slider, and the constant force spring can drive the clamping plate to move closer to another clamping plate.

[0009] Preferably, handrails are fixedly installed on the sides of the two clamping plates that are away from each other;

[0010] The top surface of the movable plate is engraved with scale values ​​along the sliding direction of the clamping plate, and an indicator block is fixedly installed on the armrest.

[0011] Preferably, the movable plate is movably installed at the opening position of the bending groove, the bottom surface of the movable plate is fixedly connected to a rotating block, and a motion groove is provided at the opening position of the bending groove on the lower template. The rotating block can rotate in the motion groove, and the sides of the two clamping plates close to each other can both rotate into the bending groove, and the two clamping plates can form a V-shaped structure.

[0012] Preferably, the positioning structure includes a tooth block, a rack and a lifting assembly; the tooth block is fixedly connected to the bottom of the clamping plate, and a movable slide groove is provided on the movable plate. The tooth block can slide in the movable slide groove, and the rack is slidably installed in the movable slide groove. The rack can engage with the tooth block, and the lifting assembly is used to drive the rack to rise in the movable slide groove and engage with the tooth block.

[0013] Preferably, the lifting assembly includes a rotating shaft, a driving block, a driving rod, an inclined block and a lifting block, the rotating shaft is rotatably installed in the motion groove, the rotating shaft passes through the rotating block, and the rotating block is provided with a through hole that slides with the rotating shaft, the driving block is fixedly connected to the outer periphery of the rotating shaft, the rotating block is provided with a limiting sliding groove that slides with the driving block, the clamping plate is provided with a transverse sliding groove that slides with the driving rod, and one end of the driving rod extends into the limiting sliding groove and abuts against the inclined surface of the driving block, and the inclined surface of the driving block is The end portion of the driving rod slides in cooperation, and a return spring is installed in the transverse slide groove, and the two ends of the return spring respectively abut against the other end of the driving rod and the inner wall of the end of the transverse slide groove; the inclined plane block is fixedly mounted on the top of the driving rod, and a movable slide groove that slides with the inclined plane block is provided in the clamping plate; the lifting block is fixedly mounted on the bottom of the rack, and a lifting hole that is connected to the movable slide groove is provided on the bottom inner wall of the movable slide groove; the lifting block is slidably mounted in the lifting hole, and the bottom end of the lifting block slides in cooperation with the top inclined plane of the inclined plane block.

[0014] Preferably, a boss is fixedly installed on one side of the lifting block, and a limiting groove that slides with the boss is opened on the inner wall of the lifting hole. A separation spring is installed in the limiting groove, and the two ends of the separation spring respectively abut against the top of the boss and the top inner wall of the limiting groove.

[0015] Preferably, the positioning structure also includes a support assembly; the support assembly includes a support rod, a support connecting rod, an anti-slip rod and a storage spring; the bottom of the clamping plate is provided with a support hole connected to the transverse sliding groove, the support rod is slidably installed in the support hole, the support connecting rod is fixedly installed at the bottom end of the support rod, the bottom of the clamping plate is provided with a storage groove capable of accommodating the support connecting rod, the bottom of the driving rod is provided with an inclined groove, the top of the support rod slides with the inclined inner wall of the inclined groove, the anti-slip rod is fixedly installed on the top surface of the support connecting rod, the bottom of the clamping plate is provided with a storage hole capable of accommodating the anti-slip rod, and the storage spring can make the anti-slip rod have a tendency to retract into the storage hole.

[0016] Preferably, a telescopic hole is provided on one side of the two clamping plates that are close to each other, a limit rod is slidably installed in the telescopic hole, one end of the limit rod passes through the telescopic hole and is fixedly connected to a tightening block, the two tightening blocks are rotatably connected by a hinge, an ejection spring is installed in the telescopic hole, and the two ends of the ejection spring are respectively fixedly connected to the end of the limit rod and the inner wall of the end of the telescopic hole.

[0017] Preferably, a support limit block is fixedly installed in the bending groove. When the two clamping plates rotate to form a V-shaped structure, the two pressing blocks respectively rest on the inclined surfaces on both sides of the support limit block, and the V-shaped groove formed between the two pressing blocks is a bending groove.

[0018] The bending device for steel processing proposed by the present invention has the following beneficial effects: through the provision of a hydraulic sheet metal bending machine main body, an upper die, a lower die plate, a movable plate, a clamping plate, a constant force drive structure and a positioning structure, it is possible to perform bending processing on the metal plate without the need for the operator to manually support the metal plate, thereby reducing the occurrence of accidents. At the same time, it has a limiting effect on the position of the metal plate during the bending process, thereby reducing the displacement of the metal plate during the bending process and ensuring the quality of the metal plate bending processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a bending device for steel processing proposed by the present invention;

[0020] Figure 2 This is a structural schematic diagram of a lower template and a movable plate in a bending device for steel processing proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom structure of a lower template in a bending device for steel processing proposed by the present invention;

[0022] Figure 4 This is a side view of the lower template and movable plate in a normal state of a bending device for steel processing proposed by the present invention;

[0023] Figure 5 This is a side view of the lower template and movable plate of the bending device for steel processing proposed by the present invention when bending a metal plate;

[0024] Figure 6 This is a structural cross-sectional view of the positioning structure within the movable plate of a bending device for steel processing proposed by the present invention;

[0025] Figure 7 This is a structural cross-sectional view of a constant force driving structure within a movable plate in a bending device for steel processing proposed by the present invention;

[0026] Figure 8 This is a schematic structural diagram of a clamping plate in a bending device for steel processing proposed by the present invention;

[0027] Figure 9 This is a schematic structural diagram of the various components of the positioning structure in a bending device for steel processing proposed by the present invention;

[0028] Figure 10 A bending device for steel processing proposed by the present invention Figure 3 Enlarged view of point A in the middle;

[0029] Figure 11 This is a partial structural cross-sectional view of a positioning structure within a movable plate in a bending device for steel processing proposed by the present invention;

[0030] Figure 12 This is a schematic diagram of the movement of a clamping block in a bending device for steel processing proposed by the present invention during the bending process of a metal plate.

[0031] In the figure: 1. Hydraulic sheet metal bending machine body; 2. Upper die; 3. Lower die plate; 4. Movable plate; 5. Clamping plate; 6. Slider; 7. Constant force spring; 8. Handrail; 9. Tooth block; 10. Rack; 11. Rotating block; 12. Rotating axis; 13. Driving block; 14. Driving rod; 15. Inclined block; 16. Lifting block; 17. Support rod; 18. Support connecting rod; 19. Anti-slip rod; 20. Storage spring; 21. Separation spring; 22. Limiting rod; 23. Tightening block; 24. Ejection spring; 25. Support limiting block; 26. Return spring. DETAILED DESCRIPTION

[0032] Reference Figures 1-12 The present invention proposes a bending device for steel processing, including a hydraulic sheet metal bending machine body 1 and an upper mold 2. A lower template 3 is fixedly installed on the hydraulic sheet metal bending machine body 1, and the lower template 3 is placed horizontally. A bending groove is opened in the middle of the top surface of the lower template 3, and two movable plates 4 are installed on the lower template 3. The movable plates 4 can be designed as a frame structure or a plate structure according to actual conditions. The two movable plates 4 are respectively located on both sides of the bending groove. When bending the metal plate, the metal plate can be placed on the movable plate 4. The top surfaces of the two movable plates 4 are slidably installed with clamping plates 5. The two clamping plates 5 are arranged parallel to each other, and the distance between the two clamping plates 5 can be adjusted. The two clamping plates 5 are used to clamp the position of the fixed sheet on the movable plate 4. A constant force driving structure is installed on the movable plate 4. The constant force driving structure is used to drive the clamping plates 5 to slide on the movable plate 4, and the force generated by the constant force driving structure on the clamping plates 5 is always constant. When placing the metal plate, the two constant force driving structures respectively drive The two clamping plates 5 clamp both sides of the metal plate. Since the two constant-force driving structures exert the same force on the two clamping plates 5, when the two clamping plates 5 clamp the metal plate, it can be ensured that the clamping force on both sides of the metal plate is the same, and the metal plate is placed horizontally on the two movable plates 4. When the metal plate is not subjected to external force, it can be ensured that the metal plate is stably placed on the movable plate 4. Moreover, when bending the metal plate, many sheets need to be bent on both sides or even four sides, but the length and width of the sheets are different, and the bending length of each side is not necessarily the same, that is, the position of the metal plate on the two movable plates 4 is also different, and the position of the clamping plates 5 on the movable plate 4 is also different. The constant-force driving structure can always ensure that the force exerted on the clamping plates 5 is the same, thereby ensuring that the clamping force on both sides of the metal plate remains consistent, ensuring the stability of the metal plate clamping, and can clamp and position metal plates of various sizes, reducing the need for operators to manually support the metal plates and reducing the occurrence of accidents.

[0033] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown in, a positioning structure is also installed on the movable plate 4, and the positioning structure is used to fix the position of the clamping plate 5 on the movable plate 4. The upper die 2 is slidably installed on the hydraulic sheet metal bending machine body 1, and the upper die 2 is driven by a hydraulic rod to perform lifting movements on the hydraulic sheet metal bending machine body 1, and the upper die 2 is located directly above the bending groove. When the sheet metal is placed on the two movable plates 4, the upper die 2 descends and rests on the sheet metal, and the sheet metal rests on the two movable plates 4 and drives the positioning structure to fix the position of the clamping plate 5 on the movable plate 4. When performing the bending operation, the metal plate is placed on the movable plate 4, and the clamping plate 5 is used to clamp the metal plate, and then the hydraulic rod is used to drive the upper die 2 to descend, and the upper die 2 descends and rests on the metal plate. The metal plate is pressed by the upper die 2, and the metal plate is pressed against the movable plate 4, and the movable plate 4 is squeezed. Use it to drive the positioning structure to work, and the positioning structure fixes the position of the clamping plate 5 on the movable plate 4, thereby ensuring the position of the metal plate. During the bending process, the clamping plate 5 limits the position of both sides of the metal plate, reducing the bending force generated by the bending of the metal plate during the bending process (the metal plate may move when it is bent. The main reason is that the metal plate is subjected to the bending force generated by the bending operation. During the bending operation, if the bending force exceeds the supporting force of the metal plate, it may cause the metal plate to move.) The movable plates 4 on both sides limit the position of both sides of the metal plate, thereby reducing the movement of the metal plate during the bending process. Without the need for the operator to hold it manually, the position of the metal plate is limited to ensure that the bending position of the metal plate will not change, thereby ensuring the quality of the metal plate bending.

[0034] like Figure 1 、 Figure 2 and Figure 7As shown, the constant force driving structure includes a slider 6 and a constant force spring 7; the design of the constant force spring 7 enables it to provide almost constant force during elastic deformation, the slider 6 is fixedly connected to the bottom of the clamping plate 5, and a driving slide groove that slides with the slider 6 is provided on the movable plate 4. A rotating groove is provided on the inner wall of the end of the driving slide groove. The inner ring end of the constant force spring 7 is fixedly installed in the rotating groove, and the outer ring end of the constant force spring 7 is fixedly connected to the slider 6. The constant force spring 7 can drive the clamping plate 5 to move closer to the other clamping plate 5, and the two clamping plates 5 are in a state of being ... The sides away from each other are fixedly installed with armrests 8, the top surface of the movable plate 4 is engraved with scale values ​​along the sliding direction of the clamping plate 5, and an indicator block is fixedly installed on the armrest 8. One clamping plate 5 is pulled and driven by two constant force springs 7 to ensure the smooth sliding of the clamping plate 5. When working, the operator picks up the metal plate and places one side of the metal plate on the opposite movable plate 4 (in actual operation, the operator stands on one side of the bending machine, and the movable plates 4 on both sides are respectively located on both sides of the bending machine). It is necessary to ensure that the metal plate is against the opposite side. The clamping plate 5 on the movable plate 4 is pushed and the metal plate is pushed to slide on the movable plate 4 on the opposite side. After sliding to the approximate position, one hand holds the metal plate to keep it in an inclined state, and the other hand grabs the handrail 8 on the clamping plate 5 on the same side as the operator and pulls it to drive the clamping plate 5 to slide on the movable plate 4, so that the indicator block on the handrail 8 points to the set scale value, and then the metal plate is put down so that the metal plate is placed horizontally on the two movable plates 4. The constant force spring 7 on the movable plate 4 opposite to the slider 6 and the clamping plate 5 slide and push The metal plate moves against the clamping plate 5 of the handrail in front. The metal plate is obstructed by the handrail clamping plate 5, so that the metal plate is clamped by the two clamping plates 5. The staff releases the handrail 8. Since the force exerted by the constant force spring 7 on the clamping plate 5 remains unchanged, that is, the clamping force of the two clamping plates 5 on both sides of the metal plate is consistent, the metal plate is clamped, thereby ensuring that when the position of the metal plate on the two movable plates 4 changes, the force exerted by the two clamping plates 5 on the metal plate is the same, thereby ensuring the stability of the metal plate being clamped.

[0035] It should be noted that the clamping plate 5 on the opposite side is also provided with an armrest 8 and an indicator block. In actual practice, the operator will only stand on one side of the bending machine, but in order to ensure the overall weight of the clamping plate 5, the weight of the clamping plate 5 pulled by the constant force spring 7 is made consistent, thereby ensuring that the force exerted by the two clamping plates 5 on the metal plate is consistent.

[0036] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10As shown, the movable plate 4 is movably installed at the opening position of the bending groove, and the bottom surface of the movable plate 4 is fixedly connected with a rotating block 11. The opening position of the bending groove on the lower template 3 is provided with a moving groove, and the rotating block 11 can rotate in the moving groove. The rotating block 11 can also slide in the moving groove. The sides of the two clamping plates 5 close to each other can be rotated into the bending groove. The two clamping plates 5 can form a V-shaped structure. When the metal plate is bent, the metal plate is placed on the two movable plates 4, and the upper mold 2 is lowered and pressed against the metal plate. The upper mold 2 squeezes the metal plate to bend into the bending groove. When the metal plate is bent, the two movable plates 4 are driven to rotate synchronously, so that the two movable plates 4 rotate and form a V-shaped structure (such as Figure 5 ), both sides of the bent metal plate respectively rest against the two movable plates 4 and also form a V shape.

[0037] like Figure 2 、 Figure 6 、 Figure 9 and Figure 11 As shown in, the positioning structure includes a tooth block 9, a rack 10 and a lifting assembly; the tooth block 9 is fixedly connected to the bottom of the clamping plate 5, and a movable slide groove is provided on the movable plate 4. The tooth block 9 can slide in the movable slide groove, and the rack 10 is slidably installed in the movable slide groove. The rack 10 can engage with the tooth block 9, and the lifting assembly is used to drive the rack 10 to rise in the movable slide groove and engage with the tooth block 9. During actual operation, the rack 10 is driven by the lifting assembly to rise in the movable slide groove, so that the rack 10 and the tooth block 9 are engaged, thereby fixing the position of the tooth block 9, and the position of the clamping plate 5 is fixed by the tooth block 9, so that the clamping plate 5 limits the position of both sides of the metal plate, reducing the movement of the metal plate during bending, ensuring the quality of the metal plate bending processing, and reducing the deviation of the metal plate bending position.

[0038] like Figure 6 、 Figure 9 、 Figure 10 and Figure 11As shown in, the lifting assembly includes a rotating shaft 12, a driving block 13, a driving rod 14, a ramp block 15 and a lifting block 16. The rotating shaft 12 is rotatably installed in the motion groove, the rotating shaft 12 passes through the rotating block 11, and the rotating block 11 is provided with a through-hole that slides with the rotating shaft 12. The driving block 13 is fixedly connected to the outer periphery of the rotating shaft 12, and a limiting slide groove that slides with the driving block 13 is provided in the rotating block 11. A transverse slide groove that slides with the driving rod 14 is provided in the clamping plate 5, and one end of the driving rod 14 extends into the limiting slide groove and abuts against the inclined surface of the driving block 13. The inclined surface of the driving block 13 slides with the end of the driving rod 14. A return spring 26 is installed in the transverse slide groove, and the two ends of the return spring 26 respectively abut against the other end of the driving rod 14 and the inner wall of the end of the transverse slide groove. The ramp block 15 is fixedly installed on the top of the driving rod 14, and a moving slide groove that slides with the ramp block 15 is provided in the clamping plate 5. The bottom inner wall of the movable slide is provided with a lifting hole connected to the movable slide. The lifting block 16 is slidably installed in the lifting hole. The bottom end of the lifting block 16 slides with the top inclined surface of the inclined block 15. In actual operation, there is a gap between the movable plate 4 and the top surface of the lower template 3. The metal plate is placed on the two movable plates 4. The upper mold 2 descends and rests on the metal plate. The metal plate is forced to press against the movable plate 4. At the same time, the metal plate and the movable plate 4 are driven to descend, so that the movable plate 4 descends and rests on the lower template 3. When the movable plate 4 descends, the movable plate 4 will drive the rotating block 11 to descend synchronously in the motion groove. The rotating shaft 12 slides in the through-hole on the rotating block 11, and the driving block 13 rises synchronously in the limiting slide following the rotating shaft 12. When the driving block 13 rises, the inclined surface at the end of the driving block 13 slides with the inclined surface at the end of the driving rod 14, so that the driving rod 14 slides horizontally in the transverse slide groove ( Figure 6 and Figure 11 When the driving rod 14 slides to the right, the driving rod 14 drives the inclined plane block 15 to move to the right synchronously, and the inclined plane on the top of the inclined plane block 15 and the bottom end of the lifting block 16 slide and cooperate, driving the lifting block 16 to rise. The raised lifting block 16 drives the rack 10 to rise synchronously, so that the rack 10 and the tooth block 9 are engaged, thereby fixing the position of the clamping plate 5 on the movable plate 4. When the rack 10 and the tooth block 9 are disengaged, it can ensure the smooth sliding of the tooth block 9.

[0039] like Figure 6 、 Figure 9 and Figure 10As shown in the figure, a boss is fixedly installed on one side of the lifting block 16, and a limiting groove is provided on the inner wall of the lifting hole to slide with the boss. A separation spring 21 is installed in the limiting groove, and the two ends of the separation spring 21 are respectively against the top of the boss and the top inner wall of the limiting groove. After the bending operation is completed, the upper mold 2 is raised to a certain height so that the upper mold 2 is still against the bent metal plate, but the metal plate becomes loose. The operator holds the movable plate 4 and the metal plate by hand, and the upper mold 2 continues to rise to loosen the metal plate, and then puts down the movable plate 4 on this side, and takes out the metal plate, or adjusts the position to continue the bending process. When the upper mold 2 is separated from the metal plate, the movable plate 4 on this side is lowered. The force acting on the movable plate 4 is reduced, and under the rebound force of the return spring 26, the driving rod 14 is driven to slide and reset in the transverse slide groove. Since the end of the driving rod 14 and the end inclined surface of the driving block 13 slide together, the driving block 13 is driven to descend in the limiting slide groove. At the same time, the driving rod 14 drives the inclined surface block 15 to slide and reset, and the lifting block 16 is not affected by the lifting effect of the inclined surface block 15. The rebound effect of the separation spring 21 drives the boss to move downward, and the boss drives the lifting block 16 and the rack 10 to descend synchronously, so that the rack 10 and the tooth block 9 are disengaged, ensuring the normal sliding of the tooth block 9, which is convenient for the operator to continue to clamp and position the metal plate.

[0040] In actual conditions, due to the support of the rotating shaft 12 and the driving block 13, there is a certain gap between the bottom of the movable plate 4 and the top surface of the lower template 3. Since the movable plate 4 is a frame or plate with a large area, the movable plate 4 will be tilted. When placing the metal plate, the horizontal placement of the metal plate cannot be protected. During the bending operation, the bending position of the metal plate may be offset. Therefore, it is necessary to support the other side of the movable plate 4 to keep the movable plate 4 horizontal, thereby ensuring that the metal plate can be placed horizontally and the bending position of the metal plate can be accurately ensured.

[0041] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 9 and Figure 11As shown, the positioning structure also includes a support assembly; the support assembly includes a support rod 17, a support link 18, an anti-slip rod 19 and a storage spring 20; the bottom of the clamping plate 5 is provided with a support hole connected to the transverse slide groove, the support rod 17 is slidably installed in the support hole, and the support link 18 is fixedly installed at the bottom end of the support rod 17, the bottom of the clamping plate 5 is provided with a storage groove that can accommodate the support link 18, the bottom of the driving rod 14 is provided with an inclined groove, the top of the support rod 17 slides with the inclined inner wall of the inclined groove, and the anti-slip rod 19 is fixedly installed on the top surface of the support link 18, and the bottom of the clamping plate 5 is provided with a storage hole that can accommodate the anti-slip rod 19, and the storage spring 20 can make the anti-slip rod 19 have a tendency to retract into the storage hole. When the metal plate is placed, the driving rod 14 is in place in the transverse slide groove, the top of the support rod 17 rests on the inclined surface of the bottom inclined groove of the driving rod 14, and the bottom end of the support rod 17 extends out of the support The top end of the support rod 17 enters the inclined groove on the bottom surface of the driving rod 14, so that the movable plate 4 can rest on the top surface of the lower template 3.

[0042] In actual situations, two plates that are pressed against each other and can rotate need to ensure that a certain distance is maintained between the two movable plates 4, or the movable plates 4 can move during the rotation process, so that the sides of the two movable plates 4 that are close to each other can always be pressed against each other. The two movable plates 4 are pressed against each other to reduce the appearance of gaps between the two movable plates 4 during bending, which leads to local stress concentration of the metal plate and bending fracture (the gap will produce stress concentration in the local area of ​​the metal plate bending, which may lead to reduced strength in the area, thereby increasing the risk of bending fracture, especially on thick plates or materials with higher hardness); uneven deformation, uneven bending, etc. (due to the existence of the gap, the metal plate may undergo uneven deformation when bending, which will affect the forming quality of the bent part, resulting in uneven edges of the finished product or a shape that does not meet the design requirements).

[0043] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 and Figure 12 The two clamping plates 5 are provided with a telescopic hole on one side close to each other, and a limit rod 22 is slidably installed in the telescopic hole. One end of the limit rod 22 passes through the telescopic hole and is fixedly connected to a clamping block 23. The two clamping blocks 23 are rotatably connected by a hinge, and an ejection spring 24 is installed in the telescopic hole. The two ends of the ejection spring 24 are respectively fixedly connected to the end of the limit rod 22 and the inner wall of the end of the telescopic hole. A support limit block 25 is fixedly installed in the bending groove. When the two clamping plates 5 rotate to form a V-shaped structure, the two clamping blocks 23 respectively abut against the inclined surfaces of the two sides of the support limit block 25, and the V-shaped groove formed between the two clamping blocks 23 is a bending groove. During the bending process, the upper mold 2 descends and abuts against the metal plate, and the position where the metal plate is abutted by the upper mold 2 moves downward. The position where the movable plate 4 and the lower mold plate 3 are rotated serves as a support point. When the metal plate is bent, the two movable plates 4 rotate at the same time, and the clamping block 23 and the limit rod 22 follow the bending and movable The movable plate 4 rotates with the rotation of the clamping block 23. When the clamping block 23 rotates, the ejection spring 24 works to drive the limit rod 22 to extend out of the telescopic hole, and the two clamping blocks 23 can ensure the connection and synchronous rotation between the movable plate 4 when rotating. Since the movable plate 4 rotates synchronously according to the bending deformation of the metal plate, the clamping plate 5 always plays the role of limiting the left and right displacement of the metal plate during the bending process of the metal plate, reducing the displacement of the metal plate during the bending process, ensuring the quality of the metal plate bending. When rotating to the final position, the two clamping blocks 23 respectively abut against the supporting limit blocks 25, thereby ensuring that the impact force generated by the upper mold 2 can act on the lower supporting limit block 25 during bending, reducing the deformation and damage of the side of the clamping block 23 caused by the impact of the upper mold 2, and ensuring the service life of the clamping block 23. In addition, when the metal plate is bent, the support point of the metal plate changes from the original line-surface contact to the current surface-to-surface contact, which can reduce the wear caused by the downward pressure gravity.

[0044] like Figure 12As shown, the specific movement is: assuming that the rotation point of the movable plate 4 is point O, the rotation connection point of the two clamping blocks 23 is P, and OP rotates along the direction of S1 with point O as the center of the circle, but since the two clamping blocks 23 rotate synchronously, the movement trajectory of point P is actually moving along the direction of S2, that is, the spacing between OP changes. In the end, the gap between the clamping block 23 and the movable plate 4 is relatively small, reducing the adverse effect of excessive gap on the bending of the metal plate, thereby ensuring that there is no gap between the two clamping blocks 23 when rotating, ensuring that the metal plate is relatively evenly stressed at the bending point during the bending process, reducing its deformation, and at the same time, an auxiliary plate is connected to the clamping block 23, and an adapter groove of the same depth as the corresponding auxiliary plate is provided on the movable plate 4, so that the connection gap between the auxiliary plate and the movable plate 4 is as far away from the bending point of the metal plate as possible, reducing the impact on the bending point of the metal plate.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bending device for steel processing, characterized in that: The invention comprises a hydraulic sheet metal bending machine body (1) and an upper die (2), wherein a lower die plate (3) is fixedly mounted on the hydraulic sheet metal bending machine body (1), a bending groove is provided in the middle of the top surface of the lower die plate (3), two movable plates (4) are mounted on the lower die plate (3), the two movable plates (4) are respectively located on both sides of the bending groove, a clamping plate (5) is slidably mounted on the top surface of the two movable plates (4), the two clamping plates (5) are arranged parallel to each other, the distance between the two clamping plates (5) can be adjusted, the two clamping plates (5) are used to clamp the position of the fixed sheet metal on the movable plate (4), a constant force driving structure is mounted on the movable plate (4), the constant force driving structure is used to drive the clamping plate (5) to slide on the movable plate (4), and the force exerted by the constant force driving structure on the clamping plate (5) remains constant; A positioning structure is also installed on the movable plate (4), and the positioning structure is used to fix the position of the clamping plate (5) on the movable plate (4). The upper die (2) is slidably installed on the hydraulic sheet metal bending machine body (1), and the upper die (2) is located directly above the bending groove; When the sheet material is placed on the two movable plates (4), the upper die (2) descends and rests on the sheet material, and the sheet material rests on the two movable plates (4) and drives the positioning structure to fix the position of the clamping plate (5) on the movable plate (4).

2. A bending device for steel processing according to claim 1, characterized in that: The constant force driving structure includes a slider (6) and a constant force spring (7); the slider (6) is fixedly connected to the bottom of the clamping plate (5); a driving slot that slides with the slider (6) is provided on the movable plate (4); a rotating slot is provided on the inner wall of the end of the driving slot; the inner ring end of the constant force spring (7) is fixedly installed in the rotating slot; the outer ring end of the constant force spring (7) is fixedly connected to the slider (6); and the constant force spring (7) can drive the clamping plate (5) to move closer to another clamping plate (5).

3. The steel material processing bending device according to claim 1, characterized in that: A handrail (8) is fixedly mounted on one side of the two clamping plates (5) that is away from each other; The top surface of the movable plate (4) is engraved with scale values ​​along the sliding direction of the clamping plate (5), and an indicator block is fixedly mounted on the armrest (8).

4. The bending device for steel processing according to claim 1, characterized in that: The movable plate (4) is movably mounted at the opening position of the bending groove, the bottom surface of the movable plate (4) is fixedly connected with a rotating block (11), the opening position of the bending groove on the lower template (3) is provided with a moving groove, the rotating block (11) can rotate in the moving groove, and the sides of the two clamping plates (5) close to each other can both rotate into the bending groove, and the two clamping plates (5) can form a V-shaped structure.

5. The steel material processing bending device according to claim 4, characterized in that: The positioning structure includes a tooth block (9), a rack (10) and a lifting assembly; the tooth block (9) is fixedly connected to the bottom of the clamping plate (5), and a movable slide groove is provided on the movable plate (4). The tooth block (9) can slide in the movable slide groove, and the rack (10) is slidably installed in the movable slide groove. The rack (10) can engage with the tooth block (9), and the lifting assembly is used to drive the rack (10) to rise in the movable slide groove and engage with the tooth block (9).

6. The steel material processing bending device according to claim 1, characterized in that: The lifting assembly includes a rotating shaft (12), a driving block (13), a driving rod (14), an inclined block (15) and a lifting block (16). The rotating shaft (12) is rotatably installed in the motion groove. The rotating shaft (12) passes through the rotating block (11), and the rotating block (11) is provided with a through hole that slides with the rotating shaft (12). The driving block (13) is fixedly connected to the outer periphery of the rotating shaft (12). The rotating block (11) is provided with a limiting slide that slides with the driving block (13). The clamping plate (5) is provided with a transverse slide that slides with the driving rod (14), and one end of the driving rod (14) extends into the limiting slide and abuts against the inclined surface of the driving block (13). The inclined surface of the movable block (13) is slidably matched with the end of the driving rod (14), and a return spring (26) is installed in the transverse slide groove. The two ends of the return spring (26) are respectively against the other end of the driving rod (14) and the inner wall of the end of the transverse slide groove. The inclined surface block (15) is fixedly installed on the top of the driving rod (14). A movable slide groove slidably matched with the inclined surface block (15) is provided in the clamping plate (5). The lifting block (16) is fixedly installed on the bottom of the rack (10). The bottom inner wall of the movable slide groove is provided with a lifting hole connected to the movable slide groove. The lifting block (16) is slidably installed in the lifting hole. The bottom end of the lifting block (16) is slidably matched with the top inclined surface of the inclined surface block (15).

7. A steel material processing bending device according to claim 6, characterized in that: A boss is fixedly installed on one side of the lifting block (16), and a limiting groove that slides with the boss is opened on the inner wall of the lifting hole. A separation spring (21) is installed in the limiting groove, and the two ends of the separation spring (21) respectively abut against the top of the boss and the inner wall of the top of the limiting groove.

8. The steel material processing bending device according to claim 6, characterized in that: The positioning structure also includes a support assembly; the support assembly includes a support rod (17), a support connecting rod (18), an anti-slip rod (19) and a storage spring (20); the bottom of the clamping plate (5) is provided with a support hole connected to the transverse sliding groove, the support rod (17) is slidably installed in the support hole, the support connecting rod (18) is fixedly installed at the bottom end of the support rod (17), the bottom of the clamping plate (5) is provided with a storage groove capable of accommodating the support connecting rod (18), the bottom of the driving rod (14) is provided with an inclined groove, the top end of the support rod (17) is slidably matched with the inclined inner wall of the inclined groove, the anti-slip rod (19) is fixedly installed on the top surface of the support connecting rod (18), the bottom of the clamping plate (5) is provided with a storage hole capable of accommodating the anti-slip rod (19), and the storage spring (20) can make the anti-slip rod (19) have a tendency to retract into the storage hole.

9. The steel material processing bending device according to claim 1, characterized in that: A telescopic hole is provided on one side of the two clamping plates (5) close to each other, a limiting rod (22) is slidably installed in the telescopic hole, one end of the limiting rod (22) passes through the telescopic hole and is fixedly connected to a tightening block (23), and the two tightening blocks (23) are rotatably connected by a hinge, and an ejection spring (24) is installed in the telescopic hole, and the two ends of the ejection spring (24) are respectively fixedly connected to the end of the limiting rod (22) and the inner wall of the end of the telescopic hole.

10. The steel material processing bending device according to claim 9, characterized in that: A support limit block (25) is fixedly installed in the bending groove. When the two clamping plates (5) rotate to form a V-shaped structure, the two pressing blocks (23) respectively abut against the inclined surfaces on both sides of the support limit block (25), and the V-shaped groove formed between the two pressing blocks (23) is a bending groove.

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