A metal product cutting mechanism with easy fixing

Abstract

The application relates to the technical field of metal product cutting, and discloses a metal product cutting mechanism with convenient fixation, which comprises a base, a cutting machine and sequential pressing structures arranged on two directional plates, a servo motor is used for driving a transmission shaft and a transmission disc to rotate through a worm and a worm wheel, a plurality of torsional springs are connected in series through head discs, tail discs and friction discs, and the friction discs drive pressing discs to sequentially press flat metal products; after a single pressing disc reaches a set pressure, a convex surface and double concave surfaces oppositely slide and transmit torque to a next pressing disc, and when reversely rotating, the pressing discs are sequentially released from one end of the transmission disc, so that the cut part can be first released from fixation while the parent material continues to be positioned.

Description

Technical Field

[0001] This invention relates to the field of metal product cutting technology, specifically to a metal product cutting mechanism capable of sequentially pressing flat metal products at multiple points and releasing them in an orderly manner according to the cutting position. Background Technology

[0002] When performing straight-line cutting, contour cutting, or segmented cutting on flat metal products, it is usually necessary to first place the metal product to be processed on the worktable, and then use multiple clamping parts to press down simultaneously to position both sides of the cutting area. Subsequently, the cutting machine, which moves along the guide structure, completes the cutting along the predetermined path.

[0003] Existing multi-point clamping structures typically use a single pressure beam to drive multiple pressure rods to lift and lower synchronously, or they can be equipped with cylinders, hydraulic cylinders, or screws for each clamping position. The former structure will release all clamping positions at the same time when the clamping is released, while the latter structure, although it can be controlled individually, requires the execution and coordination of multiple driving components, making the control relationship and pipeline layout more complex.

[0004] After a section of cutting is completed, the cut part of a flat metal product needs to be separated from the base material and removed. However, the base material often needs to be cut at the next position. If all the clamped positions are released at the same time, the base material will shift due to cutting vibration, movement of the cut part, or manual removal. After clamping again, the original reference is difficult to maintain, which can easily cause positional errors in the subsequent cutting path.

[0005] Therefore, there is a need for a metal product cutting mechanism that can sequentially establish stable pressure at multiple clamping positions during initial fixing, and sequentially release some of the clamping positions from a specified direction after cutting, so that the cut part can be detached, while keeping the base material that still needs to be processed in its original position. Summary of the Invention

[0006] To address the problem that simultaneous release of multiple clamping positions in existing technologies can cause material displacement, and that multiple independent driving components increase control complexity, this invention provides a metal product cutting mechanism with easy-to-fix features. Through multiple sets of torsion springs, head discs, tail discs, and friction discs on the same drive shaft, a torque path is formed to transmit torque step by step, enabling the pressure plates to be clamped sequentially and released sequentially from one end of the drive disc.

[0007] In this invention, the base supports the metal product and the cutting structure. The guide rod is set on the base, and the cutting machine moves along the guide rod to form a cutting path. Two directional plates are detachably connected to the base and are positioned opposite each other on both sides of the metal product, so that the two rows of pressure plates act on the two edge areas of the metal product respectively.

[0008] Each directional plate is rotatably connected to a drive shaft. The servo motor drives the drive shaft to rotate via a worm and a worm wheel. The transmission between the worm and the worm wheel can reduce the speed of the pressing action and also limit the drive shaft from being subjected to the reaction force of the pressure plate and causing it to reverse on its own after the servo motor stops.

[0009] A transmission disc is installed on the transmission shaft, and multiple sets of torsion springs are arranged in series along the axial direction of the transmission shaft. The outer ends of two torsion springs located at both ends of the transmission shaft are connected to the transmission disc and the directional plate, respectively. The opposing ends of adjacent torsion springs are connected to the head disc and the tail disc, respectively, so that each set of torsion springs forms a continuous elastic transmission chain between the transmission disc and the directional plate.

[0010] Multiple transmission rods are set on the tail plate, and multiple transmission holes are opened on the head plate. The transmission rods are slidably connected in the transmission holes of adjacent head plates, so that adjacent torsion spring units can maintain a coaxial position and rotate relative to each other within the circumferential stroke allowed by the transmission holes, thus avoiding the torsion springs from being subjected to eccentric loads that are inconsistent with the axial direction.

[0011] Both the head plate and the tail plate are rotatably connected to the drive shaft through through holes. The end faces of the head plate and the tail plate facing each other form convex surfaces. Friction plates are set between adjacent head plates and tail plates. The double concave surfaces at both ends of the friction plates are in contact with the convex surfaces. The axial preload of each torsion spring keeps the convex surfaces pressed against the double concave surfaces.

[0012] When the transmission disc rotates in the forward direction, the torsion spring near the transmission disc first twists and drives the first friction disc to rotate through the head disc, the raised surface and the double concave surface. After the pressure plate on the first friction disc contacts the metal product, it continues to apply pressure. When the torque required by the friction disc exceeds the friction torque that can be transmitted between the raised surface and the double concave surface, the two slide relative to each other. The subsequent torque is transmitted through the next torsion spring unit, so that the remaining pressure plates establish a pressing state in sequence.

[0013] A stop block is set on the friction disc, and the stop block is connected to the follower ring. The threaded sleeve is threadedly connected inside the follower ring. Rotating the threaded sleeve can change the extension distance of the pressure plate relative to the friction disc, so that multiple pressure plates can adapt to the thickness of the metal product and the installation height on the base before the clamping begins.

[0014] A vertical hole is opened in the threaded sleeve, and a vertical rod is slidably connected in the vertical hole. The lower end of the vertical rod is connected to the pressure plate via a pressure spring. A positioning spring is set between the pressure plate and the threaded sleeve, so that the pressure plate can change its orientation when subjected to tilting contact force and return to a stable position after the contact is released.

[0015] When the drive shaft rotates in the reverse direction, the torsion spring unit near the drive disc first drives the corresponding friction disc in the reverse direction, causing the pressure plate on the friction disc to leave the metal product first. Then, the torque is transmitted axially step by step and the subsequent pressure plates are released in sequence. By controlling the reverse rotation angle of the servo motor, only a few pressure plates covering the cut-off part can be released, while the remaining pressure plates in the base material area continue to be pressed.

[0016] After the pressure plate rotates to the release position, the stop block abuts against the guide plate, thereby restricting the corresponding friction plate from continuing to rotate in the opposite direction and providing a fulcrum for the subsequent torsion spring unit to transmit torque in the opposite direction. After multiple stop blocks reach the guide plate in sequence, multiple pressure plates can return to the same initial waiting position.

[0017] Beneficial effects This invention utilizes multiple sets of torsion springs, as well as a head plate, a tail plate, and a friction plate to form a torque path that is transmitted step by step along the drive shaft axis. A single servo motor can drive multiple pressure plates to press sequentially, eliminating the need to set up separate actuators and control lines for each pressing position.

[0018] This invention utilizes the axial pressing friction between the raised surface and the double concave surface to form a torque-limiting transmission. After the pressure plate that has contacted the metal product reaches the corresponding pressure, the corresponding friction plate can slide relative to the head plate and the tail plate, so that the pressure plate no longer increases the pressure indefinitely, while allowing the torque to continue to be transmitted to the next pressure plate.

[0019] This invention establishes and releases the clamping state sequentially from one end of the transmission disc to the far end. After the cutting is completed, the number of releases can be controlled according to the area where the cut part is located, so that when the cut part is released, the base material is still positioned by the remaining pressure plate, thereby reducing the deviation caused by the repositioning of the base material before subsequent cutting.

[0020] The present invention forms a retractable and adaptable clamping end by means of a vertical rod, a pressure spring, a positioning spring and a pressure plate. The threaded sleeve can also pre-adjust the extension position of the pressure plate, so that the multi-point clamping structure can adapt to flat metal products of different thicknesses and maintain stable clamping force transmission. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the metal product cutting mechanism in this invention; Figure 2 This is a schematic diagram of the sequential pressing structure on the directional plate in this invention; Figure 3 This is a partial structural diagram of the torsion spring, head disc, tail disc, friction disc, and pressure disc in this invention; Figure 4 This is a schematic diagram of the head plate, transmission rod, and transmission hole in this invention; Figure 5 This is a schematic diagram of the structure of the friction disk, stop block, follower ring, and double concave surface in this invention; Figure 6 This is a schematic diagram of the structure of the pressure plate, pressure spring, positioning spring, vertical rod, and threaded sleeve in this invention; Figure 7 This is a cross-sectional view of the vertical rod and threaded sleeve in this invention. Figure 8This is an exploded structural diagram of the vertical rod, compression spring, positioning spring, and pressure plate in this invention.

[0022] Reference numerals: 1. Base; 2. Guide rod; 3. Cutting machine; 4. Orientation plate; 5. Servo motor; 6. Worm gear; 7. Worm wheel; 8. Drive shaft; 9. Drive plate; 10. Torsion spring; 11. Head plate; 12. Tail plate; 13. Drive rod; 14. Drive hole; 15. Raised surface; 16. Through hole; 17. Friction plate; 18. Double concave surface; 19. Stop block; 20. Follower ring; 21. Threaded sleeve; 22. Vertical hole; 23. Vertical rod; 24. Pressure plate; 25. Compression spring; 26. Positioning spring. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following is a summary of these embodiments. Figures 1 to 8 The structural connection, sequential clamping process, selective release process, and reset process of the present invention will be described.

[0024] like Figure 1 As shown, the base 1 forms the basic load-bearing structure of the entire cutting mechanism. The guide rod 2 is installed on the base 1, and the cutting machine 3 is slidably connected to the guide rod 2. The flat metal product is placed in the processing area of ​​the base 1. After the cutting machine 3 moves along the guide rod 2, it can cross the metal product and complete the straight line or predetermined path cutting.

[0025] Two detachable guide plates 4 are connected to the base 1. The two guide plates 4 are located on both sides of the metal product to be processed. The length direction of the guide plates 4 is adapted to the main cutting direction. Each guide plate 4 is provided with a row of pressure plates 24 arranged axially at intervals. The two rows of pressure plates 24 press the two edge areas of the metal product respectively and leave the middle with the moving space of the cutting machine 3.

[0026] The directional plate 4 is detachably connected, which can change the distance between the two rows of pressure plates 24 according to the width of the metal product. During installation, the two directional plates 4 are made parallel to each other and the corresponding pressure plates 24 are located in the same lateral position, thereby adapting to flat metal products of different widths without changing the sequential transmission structure.

[0027] like Figure 2 As shown, the drive shaft 8 is rotatably connected to the guide plate 4 along the length of the guide plate 4. A servo motor 5 is fixedly installed at one end of the guide plate 4. The extended end of the servo motor 5 is fixedly connected to the worm gear 6. The end of the drive shaft 8 near the servo motor 5 is fixedly connected to the worm wheel 7. After the worm gear 6 meshes with the worm wheel 7, it converts the rotation of the servo motor 5 into the low-speed, high-torque rotation of the drive shaft 8.

[0028] The worm 6 and worm wheel 7 play a role in deceleration and holding during the clamping process. After the servo motor 5 stops, the reverse force transmitted from the pressure plate 24 through the pressure spring 25, friction plate 17 and torsion spring 10 is not likely to directly drive the worm 6 to reverse. Therefore, the multiple clamping positions that have been established can continue to be maintained when the cutting machine 3 moves and vibrates.

[0029] A transmission disc 9 is fixedly mounted on the transmission shaft 8. Multiple sets of torsion springs 10 are sequentially sleeved along the axial direction of the transmission shaft 8. The outer ends of the two torsion springs 10 located at both ends of the transmission shaft 8 are connected to the transmission disc 9 and the directional plate 4, respectively. Each set of torsion springs 10 maintains axial contact and elastic preload between the transmission disc 9 and the directional plate 4.

[0030] The opposing ends of adjacent torsion springs 10 are connected to head plate 11 and tail plate 12 respectively. Through holes 16 are opened on head plate 11 and tail plate 12 respectively. Drive shaft 8 passes through through holes 16, so that head plate 11 and tail plate 12 can rotate around drive shaft 8 without forming a rigid synchronous connection with drive shaft 8.

[0031] like Figure 3 and Figure 4 As shown, a plurality of transmission rods 13 are fixedly arranged circumferentially at one end of the tail plate 12 facing the adjacent head plate 11. A plurality of transmission holes 14 are correspondingly opened on the head plate 11. The transmission rods 13 are slidably connected in the transmission holes 14. The transmission holes 14 provide circumferential movement margin for the transmission rods 13 and restrict the radial misalignment of adjacent plates.

[0032] When the transmission rod 13 moves within the transmission hole 14, adjacent torsion spring units can rotate relative to each other within a limited angle. After multiple transmission rods 13 are distributed circumferentially, they jointly bear the deflection load between the discs, avoiding concentrated force at a single connection position and keeping the torsion center of the torsion spring 10 close to the axis of the transmission shaft 8.

[0033] The end faces of adjacent head discs 11 and tail discs 12 facing each other are provided with raised surfaces 15. Friction disc 17 is disposed between adjacent head discs 11 and tail discs 12. Both ends of friction disc 17 are provided with double concave surfaces 18. The two raised surfaces 15 press on the double concave surfaces 18 respectively and maintain frictional contact under the axial preload of torsion spring 10.

[0034] The double concave surface 18 is a recessed contact surface arranged around the drive shaft 8. After the convex surface 15 and the double concave surface 18 are engaged, they can both coaxially position the friction disk 17 and form a torque transmission area with a set friction radius. The contact pressure, surface roughness and effective radius of the convex surface 15 and the double concave surface 18 together determine the maximum torque that can be transmitted at a single pressing position.

[0035] like Figure 5 and Figure 6As shown, a stop block 19 is fixedly connected to the outer side of the friction disc 17. A follower ring 20 is provided at the end of the stop block 19 away from the friction disc 17. A threaded sleeve 21 is threadedly connected to the follower ring 20. The operator can change the extension amount of the threaded sleeve 21 relative to the follower ring 20 by rotating the threaded sleeve 21 and adjust the initial height of the pressure plate 24.

[0036] A vertical hole 22 extending along its axial direction is provided in the threaded sleeve 21, and a vertical rod 23 is slidably connected in the vertical hole 22, so that the vertical rod 23 can move up and down relative to the threaded sleeve 21 and transmit the elastic force generated by the pressure spring 25 to the pressure plate 24.

[0037] A pressure spring 25 is provided between the lower end of the vertical rod 23 and the pressure plate 24. The two ends of the pressure spring 25 are connected to the vertical rod 23 and the pressure plate 24 respectively. A positioning spring 26 is also provided on the pressure plate 24. The end of the positioning spring 26 away from the pressure plate 24 abuts against the lower end of the threaded sleeve 21, so that the pressure plate 24 remains in a stable pressing direction facing the base 1 when it is not in contact with the metal product.

[0038] When the pressure plate 24 contacts the surface of the metal product at a slightly inclined angle, the vertical rod 23 can slide within a small range in the vertical hole 22, the pressure spring 25 is compressed and applies continuous pressure to the pressure plate 24, and the positioning spring 26 undergoes corresponding elastic deformation as the angle of the pressure plate 24 changes, thereby adjusting the contact direction of the pressure plate 24 and increasing the effective contact area with the surface of the metal product.

[0039] Before cutting, rotate each threaded sleeve 21 according to the thickness of the metal product so that the multiple pressure plates 24 maintain an initial distance close to the upper surface of the metal product in the released state. Then start the two servo motors 5 to rotate in the forward direction. The worm 6 drives the transmission shaft 8 and transmission disk 9 to rotate through the worm wheel 7. The transmission disk 9 first applies torsional force to the torsion spring 10 closest to it.

[0040] The torsion spring 10 closest to the transmission disc 9 drives the corresponding head disc 11 or tail disc 12 to rotate. The friction between the raised surface 15 and the double concave surface 18 drives the first friction disc 17 to rotate synchronously. The first friction disc 17 drives the first pressure disc 24 to swing downward through the stop block 19, the follower ring 20 and the threaded sleeve 21 until the first pressure disc 24 contacts the metal product.

[0041] After the first pressure plate 24 contacts the metal product, the pressure spring 25 is gradually compressed and the clamping force increases. The torque required for the friction plate 17 to continue rotating increases accordingly. When the torque reaches the friction torque that the raised surface 15 and the double concave surface 18 can transmit, the raised surface 15 begins to slide relative to the double concave surface 18, so that the first pressure plate 24 is kept within the corresponding clamping force range.

[0042] After the transmission disc 9 continues to rotate, the relative sliding at the first friction disc 17 no longer blocks the transmission of torque to the far end. The subsequent torsion springs 10 twist in sequence. The second pressure disc 24 to the farthest pressure disc 24 contact the metal products one by one and compress the corresponding pressure springs 25 in the same process as the first pressure disc 24, until all the pressure discs 24 on the two directional plates 4 are pressed.

[0043] After all the pressure plates 24 are in a clamping state, the servo motor 5 stops rotating, the worm 6 and worm wheel 7 maintain the angle of the transmission shaft 8, multiple sets of torsion springs 10 maintain torsional preload, and multiple raised surfaces 15 and double concave surfaces 18 maintain frictional contact. When the cutting machine 3 moves along the guide rod 2, the cut part of the metal product and the base material are clamped by the pressure plates 24 in their respective areas.

[0044] When the cutting is completed and the cut part needs to be removed, the servo motor 5 is controlled to rotate in the reverse direction. The transmission disk 9 first causes the torsion spring 10 closest to the transmission disk 9 to be released in the reverse direction. The first friction disk 17 rotates in the reverse direction and drives the first pressure disk 24 away from the metal product. The first stop block 19 abuts against the directional plate 4 after the friction disk 17 rotates and restricts the first friction disk 17 from continuing to move in the reverse direction.

[0045] When the servo motor 5 continues to rotate in the reverse direction, the limit formed by the first stop block 19 and the directional plate 4 transmits the reverse torque to the next torsion spring unit. The second friction disc 17 and the subsequent friction discs 17 rotate in reverse from the end closest to the transmission disc 9 to the far end, so that the multiple pressure discs 24 are released one by one in the same spatial direction as the pressing sequence.

[0046] Based on the coverage area of ​​the cut portion along the drive shaft 8, the servo motor 5 stops reversing after the corresponding number of pressure plates 24 are released. At this time, the pressure plates 24 above the cut portion have been removed, and the operator can remove the cut portion. Meanwhile, the remaining pressure plates 24 in the mother material area are still held in place by the torsion spring 10, friction plate 17, worm 6, and worm wheel 7, so the mother material can be cut into the next section without repositioning.

[0047] After all the cutting of the same piece of base material is completed, the servo motor 5 continues to rotate in the opposite direction until each stop block 19 contacts the directional plate 4 in sequence, all pressure plates 24 return to the release position, and multiple sets of torsion springs 10 return to the initial pre-tension state. Then the remaining base material can be taken out and the next piece of metal product can be placed in.

[0048] In this embodiment, the convex surface 15 and the double concave surface 18 can change the torque limit value by adjusting the contact radius, contact width and surface condition. The pressure spring 25 can be selected according to the surface pressure that the metal product can withstand. The threaded sleeve 21 is used to compensate for the initial height difference caused by different thicknesses. These adjustments do not change the working principle of the torque being transmitted step by step from the transmission disc 9 to the far end and the pressure disc 24 being released in sequence.

[0049] The two directional plates 4 can release different quantities depending on the position of the cutting line, so that the cut portion on one side of the cutting line is released while the base material on the other side is held, or the pressure plates 24 at the same position on both sides can be released synchronously and sequentially. The specific control method is determined according to the cutting direction of the metal product and the area where the cut portion is located.

[0050] The detachable and fixed connections mentioned above can be connected by fasteners or welded according to the load requirements. The drive shaft 8, head plate 11, tail plate 12 and friction plate 17 are made of metal materials that can withstand repeated torsional loads. The surface of the pressure plate 24 that contacts the metal product can be kept flat or have an anti-slip surface. All of these are within the protection scope of this invention without changing the connection relationship and sequential transmission principle of each numbered component.

Claims

1. A metal product cutting mechanism with convenient fixing, comprising a base (1), a guide rod (2) disposed on the base (1), and a cutting machine (3) slidably disposed on the guide rod (2), wherein two directional plates (4) are detachably connected to the base (1), characterized in that: A drive shaft (8) is rotatably connected inside the directional plate (4). The drive shaft (8) is equipped with a drive disc (9) and multiple sets of torsion springs (10) connected in series along the axial direction. The outer ends of the two torsion springs (10) located at both ends of the drive shaft (8) are connected to the drive disc (9) and the directional plate (4) respectively. The opposing ends of the adjacent torsion springs (10) are connected to the head disc (11) and the tail disc (12) respectively. A friction disc (17) is provided between the adjacent head disc (11) and the tail disc (12). The raised surfaces (15) of the head disc (11) and the tail disc (12) are pressed on the double concave surfaces (18) at both ends of the friction disc (17) respectively. The friction disc (17) is connected to the stop block (19). The follower ring (20) on the stop block (19) is connected to the threaded sleeve (21) with the pressure plate (24). When the drive disc (9) rotates, multiple pressure plates (24) press or release metal products in sequence along the axial direction of the drive shaft (8).

2. The metal product cutting mechanism with convenient fixing according to claim 1, characterized in that: Two directional plates (4) are arranged opposite each other on both sides of the metal product. The drive shaft (8) on each directional plate (4) extends along the edge of the metal product. Multiple pressure plates (24) are arranged at intervals along the axial direction of the drive shaft (8).

3. A metal product cutting mechanism with convenient fixing according to claim 2, characterized in that: A servo motor (5) is fixedly connected to the directional plate (4). The extended end of the servo motor (5) is connected to the worm (6). A worm wheel (7) is fixedly connected to the transmission shaft (8). The worm (6) meshes with the worm wheel (7).

4. A metal product cutting mechanism with convenient fixing according to claim 3, characterized in that: Multiple sets of torsion springs (10) are all sleeved on the outside of the transmission shaft (8) and are kept in a pre-tight state of mutual compression in the axial direction of the transmission shaft (8).

5. A metal product cutting mechanism with convenient fixing according to claim 4, characterized in that: Multiple transmission rods (13) are arranged circumferentially on the tail plate (12), and multiple transmission holes (14) are opened circumferentially on the head plate (11). The transmission rods (13) are slidably connected in the transmission holes (14) of the adjacent head plate (11).

6. A metal product cutting mechanism with convenient fixing according to claim 5, characterized in that: Both the head plate (11) and the tail plate (12) have through holes (16) for the drive shaft (8) to pass through. The head plate (11) and the tail plate (12) are respectively rotatably sleeved on the drive shaft (8), and the protruding surface (15) is arranged around the through hole (16).

7. A metal product cutting mechanism with convenient fixing according to claim 6, characterized in that: The follower ring (20) is located at the end of the stop block (19) away from the friction disc (17). The threaded sleeve (21) is threadedly connected to the follower ring (20). Rotating the threaded sleeve (21) can change the distance between the pressure plate (24) and the friction disc (17).

8. A metal product cutting mechanism with convenient fixing according to claim 7, characterized in that: A vertical hole (22) is provided inside the threaded sleeve (21), and a vertical rod (23) is slidably connected inside the vertical hole (22).

9. A metal product cutting mechanism with convenient fixing according to claim 8, characterized in that: The lower end of the vertical rod (23) is connected to the pressure plate (24) via a compression spring (25). A positioning spring (26) is provided on the pressure plate (24). The end of the positioning spring (26) away from the pressure plate (24) abuts against the lower end of the threaded sleeve (21).

10. A metal product cutting mechanism with convenient fixing according to claim 9, characterized in that: The stop blocks (19) on each friction disc (17) extend toward the guide plate (4). When the drive shaft (8) rotates in the opposite direction, the stop blocks (19) closest to the drive disc (9) first contact the guide plate (4), and the remaining stop blocks (19) can contact the guide plate (4) in turn.

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