Lightweight and thin metal sheet non-marking clamping equipment

Abstract

This invention discloses a non-marking clamping device for thin metal sheets, including a processing base plate and a processing base fixed on the processing base plate. Both the processing base plate and the processing base are rectangular in shape and have four sides. A pressing component is provided on each side, and the pressing component can be adjusted vertically to press and clamp the thin metal sheet placed on the processing base downwards. When the thin metal sheet expands outwards due to cutting force and thermal stress generated during processing, the corresponding pressing component allows the thin metal sheet to extend outwards away from the processing base. This invention uses a rolling roller to press the metal sheet downwards to achieve a tight clamping of the metal sheet. When the thin metal sheet expands outwards due to thermal expansion during processing, the roller rotates accordingly, allowing the metal sheet to extend outwards, overcoming the problem of the metal sheet not being able to extend and causing protrusions, thus facilitating the processing of the metal sheet.

Description

Technical Field

[0001] This invention relates to the field of clamping technology, and more particularly to a non-marking clamping device for thin and light metal plates. Background Technology

[0002] Thin sheet metal parts are frequently encountered in machining. During the machining process, the metal sheet usually needs to be clamped and secured first to facilitate subsequent milling, drilling and other machining processes.

[0003] Thin metal sheets are typically clamped using clamping plates or vises. The cutting force and thermal stress generated during processing cause the thin metal sheet to deform and thermally expand outwards. However, due to the restriction of the clamping plates or the surrounding clamping plates, the thin metal sheet cannot expand outwards and can only bulge upwards, resulting in vibration during processing, which is not conducive to the processing of thin metal sheets. Summary of the Invention

[0004] The purpose of this invention is to propose a non-marking clamping device for thin metal sheets, which solves the problem that thin metal sheets cannot extend outward during processing, resulting in upward bulges that are detrimental to processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A non-marking clamping device for thin metal sheets includes a processing base plate and a processing base fixed on the processing base plate. Both the processing base plate and the processing base are rectangular in shape and have four sides. Each side is provided with a pressing component, which can be adjusted up and down to press and clamp the thin metal sheet placed on the processing base downward. When the thin metal sheet expands outward due to the cutting force and thermal stress generated during processing, the corresponding pressing component allows the thin metal sheet to extend outward away from the processing base.

[0007] Preferably, the pressing component includes a vertical plate fixed to the processing base plate, an L-shaped plate provided on the vertical plate, an adjusting plate slidably connected to the L-shaped plate, a threaded rod fixedly connected to the L-shaped plate, the threaded rod passing through the adjusting plate above it, a fastener threadedly connected to the outer wall of the threaded rod, the fastener being located on the upper side of the adjusting plate, the fastener including a rotating ring and two mating blocks inclinedly fixed on the rotating ring, the inner wall of the rotating ring having an internal thread, and threadedly connected to the threaded rod.

[0008] Preferably, the L-shaped plate has a first limiting groove, the adjusting plate is fixedly connected to the first limiting block, the first limiting block is adapted to the first limiting groove and is located in the first limiting groove and is slidably connected to the first limiting groove.

[0009] Preferably, the L-shaped plate is fixedly connected to the vertical plate, the adjusting plate is fixedly connected to the fixing plate, two connecting blocks are fixedly connected to the lower side of the fixing plate, a roller is rotatably connected between the two connecting blocks, and a rubber ring is fixedly sleeved on the outer wall of the roller.

[0010] Preferably, the connecting block has a through-hole, and a circular receiving groove is formed inside the connecting block. The receiving groove is coaxial with the through-hole, and the through-hole is slidably connected to the rotating shaft. A first ring and a second ring are formed inside the receiving groove. The first ring is fixedly connected to the inner wall of the receiving groove, the inner ring of the first ring is slidably connected to the outer wall of the rotating shaft, and the inner ring of the second ring is fixedly connected to the outer wall of the rotating shaft. A compression spring is sleeved on the outer wall of the rotating shaft, and the two ends of the compression spring contact the second ring and the receiving groove, respectively. Multiple inclined grooves are formed at equal intervals on the circumference of the side where the first ring and the second ring contact. Multiple inclined bodies are fixedly connected at equal intervals on the circumference of the side where the second ring and the first ring contact. The inclined bodies are adapted to the inclined grooves so that the inclined bodies can fit into the inclined grooves. The inclined groove has a first straight surface and a first inclined surface, and the inclined body has a second straight surface and a second inclined surface.

[0011] Preferably, the L-shaped plate and the vertical plate are slidably limited together, a second limiting block is fixedly connected to the lower side of the L-shaped plate, a second limiting groove is formed on the upper side of the vertical plate, the second limiting block is adapted to the second limiting groove, the second limiting block is located in the second limiting groove and is slidably connected to the second limiting groove.

[0012] Preferably, the L-shaped plate has a protrusion on one side, which corresponds to the rubber block. The rectangular base has a rectangular groove, and the L-shaped plate and the protrusion can extend into the corresponding rectangular groove. The top surface of the protrusion is flush with the top surface of the rectangular base.

[0013] Preferably, the vertical plate fixes two extension plates, and a circular roller is rotatably connected between the two extension plates. The L-shaped plate is connected to a wire, which passes around the circular roller and extends downward. The extended end of the wire is connected to a counterweight. When the L-shaped plate and the protrusion are fully inserted into the rectangular groove, the second limiting block contacts the side of the second limiting groove away from the counterweight.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. This invention uses a rolling roller to press the metal plate downward to achieve a tight clamping of the metal plate. When the thin metal plate expands outward due to thermal expansion during processing, the roller rotates accordingly to allow the metal plate to extend outward, overcoming the problem of the metal plate not being able to extend and causing a protrusion, thus facilitating the processing of the metal plate.

[0016] 2. The present invention uses rubber blocks and protrusions to clamp and secure a thin metal plate on a rectangular base from the top and bottom, and applies an outward pulling force to the thin metal plate. When the thin metal plate expands outward due to thermal expansion during processing, it can be pulled smoothly, allowing the metal plate to extend outward. This overcomes the problem of the metal plate not being able to extend and causing protrusions, thus facilitating the processing of the metal plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a first embodiment of the thin and light metal plate non-marking clamping device proposed in this invention;

[0018] Figure 2 This is a schematic diagram of the connection structure between the vertical plate and the roller in Embodiment 1 of the thin metal plate non-marking clamping device proposed in this invention;

[0019] Figure 3 This is a schematic diagram of the fastener structure in Embodiment 1 of the thin metal plate non-marking clamping device proposed in this invention;

[0020] Figure 4 This is an exploded view of the connection structure between the fixing plate and the rotating shaft in Embodiment 1 of the thin metal plate non-marking clamping device proposed in this invention.

[0021] Figure 5 This is a schematic diagram of the inclined body and inclined groove in Embodiment 1 of the thin metal plate non-marking clamping device proposed in this invention;

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the thin and light metal plate non-marking clamping device proposed in this invention;

[0023] Figure 7 This is a schematic diagram of the connection structure between the vertical plate and the rubber block in Embodiment 2 of the thin metal plate non-marking clamping device proposed in this invention;

[0024] Figure 8 This is an exploded view of the connection structure between the vertical plate and the rubber block in Embodiment 2 of the thin metal plate non-marking clamping device proposed in this invention.

[0025] In the diagram: 1. Machining base plate; 2. Machining base; 3. Vertical plate; 4. L-shaped plate; 5. Adjusting plate; 6. Threaded rod; 7. Fastener; 8. Rotating ring; 9. Mating block; 10. Internal thread; 11. First limiting groove; 12. First limiting block; 13. Fixing plate; 14. Connecting block; 15. Roller; 16. Rubber ring; 17. Rotating hole; 18. Accommodating groove; 19. Rotating shaft; 20. First ring body; 21. Second ring body; 22. Compression spring; 23. Inclined groove; 24. Inclined body; 25. First straight surface; 26. First inclined surface; 27. Second straight surface; 28. Second inclined surface; 29. ​​Second limiting block; 30. Second limiting groove; 31. Rubber block; 32. Protrusion; 33. Rectangular groove; 34. Extension plate; 35. Circular roller; 36. Wire; 37. Counterweight block. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1:

[0028] Reference Appendix Figure 1 -Appendix Figure 5 The thin metal plate non-marking clamping device includes a processing base plate 1 and a processing base 2 fixed on the processing base plate 1. Both the processing base plate 1 and the processing base 2 are rectangular in shape and have four sides. Each side is provided with a pressing component. The pressing component can move up and down to adjust, thereby pressing and clamping the thin metal plate placed on the processing base 2 downward. When the thin metal plate extends outward due to the cutting force and thermal stress generated by processing, the corresponding pressing component allows the thin metal plate to extend outward in a direction away from the processing base 2.

[0029] The pressing component includes a vertical plate 3 fixed on the processing base plate 1, an L-shaped plate 4 is provided on the vertical plate 3, an adjusting plate 5 is slidably connected to the L-shaped plate 4, a threaded rod 6 is fixedly connected to the L-shaped plate 4, the threaded rod 6 passes through the adjusting plate 5 above it, and a fastener 7 is threadedly connected to the outer wall of the threaded rod 6. The fastener 7 is located on the upper side of the adjusting plate 5. The fastener 7 includes a rotating ring 8 and two mating blocks 9 that are inclinedly fixed on the rotating ring 8. The inner wall of the rotating ring 8 has an internal thread 10, which is threadedly connected to the threaded rod 6.

[0030] The L-shaped plate 4 has a first limiting groove 11, and the adjusting plate 5 is fixedly connected to the first limiting block 12. The first limiting block 12 is adapted to the first limiting groove 11 and is located in the first limiting groove 11 and is slidably connected to the first limiting groove 11, so that the adjusting plate 5 cannot be separated from the L-shaped plate 4.

[0031] The L-shaped plate 4 is fixedly connected to the vertical plate 3. The adjusting plate 5 is fixedly connected to the fixing plate 13. Two connecting blocks 14 are fixedly connected to the lower side of the fixing plate 13. The roller 15 is rotatably connected between the two connecting blocks 14. The outer wall of the roller 15 is fixedly fitted with a rubber ring 16.

[0032] A connecting block 14 has a through-hole 17, and a circular receiving groove 18 is also formed inside the connecting block 14. The receiving groove 18 is coaxial with the through-hole 17. The through-hole 17 is slidably connected to the rotating shaft 19. A first ring 20 and a second ring 21 are arranged inside the receiving groove 18. The first ring 20 is fixedly connected to the inner wall of the receiving groove 18, and the inner ring of the first ring 20 is slidably connected to the outer wall of the rotating shaft 19. The inner ring of the second ring 21 is fixedly connected to the outer wall of the rotating shaft 19. A compression spring 22 is sleeved on the outer wall of the rotating shaft 19. The two ends of the compression spring 22 are in contact with the second ring 21 and the receiving groove 18, respectively. Under the elastic action of the compression spring 22, the first ring 20 and the second ring 21 are in close contact. Multiple inclined grooves 23 are equidistantly formed on the circumference of the side where the first ring 20 and the second ring 21 are in contact. Multiple inclined bodies 24 are equidistantly fixedly connected on the circumference of the side where the second ring 21 and the first ring 20 are in contact. The inclined body 24 is adapted to the inclined groove 23 so that the inclined body 24 can be precisely inserted into the inclined groove 23. The inclined groove 23 has a first straight surface 25 and a first inclined surface 26. The inclined body 24 has a second straight surface 27 and a second inclined surface 28. When inserted, the first straight surface 25 contacts the second straight surface 27, and the first inclined surface 26 contacts the second inclined surface 28. When the thin metal plate extends outward, the roller 15 rotates accordingly, so that the second ring 21 rotates relative to the first ring 20. Then the second inclined surface 28 slides along the direction of the first inclined surface 26, so that the second ring 21 gradually moves away from the first ring 20 and squeezes the compression spring 22 until the inclined body 24 is inserted into another inclined groove 23. At the same time, because the first straight surface 25 and the second straight surface 27 touch each other, the second ring 21 and the first ring 20 rotate in one direction only. It is only allowed to rotate when the thin metal plate extends outward, and cannot rotate in the opposite direction.

[0033] Working principle:

[0034] The metal plate is placed on a rectangular base and pressed down by rollers 15 in four directions onto the upper side of the metal plate. The metal plate is then locked in place by fasteners 7.

[0035] During processing, the metal sheet expands outward due to thermal expansion. The sliding friction drives the roller 15 to rotate accordingly, causing the second ring 21 to rotate relative to the first ring 20. The second inclined surface 28 slides along the direction of the first inclined surface 26, causing the second ring 21 to gradually move away from the first ring 20 and compress the compression spring 22 until the inclined body 24 is re-engaged into another inclined groove 23. The roller 15 ensures that it presses the metal sheet downward while allowing the metal sheet to expand outward due to thermal expansion.

[0036] It should be noted that if the four rollers 15 only apply downward pressing force to the metal plate, it is easy to become unstable during the processing. This is because the existing pressure plate mainly stabilizes the metal plate by increasing the sliding friction between the pressure plate and the clamped metal plate. Therefore, a function that allows only unidirectional rotation of the rollers 15 is added inside the connecting block 14 to stabilize the metal plate.

[0037] Example 2:

[0038] Reference Appendix Figure 6 -Appendix Figure 8 The L-shaped plate 4 and the vertical plate 3 are slidably limited together. The lower side of the L-shaped plate 4 is fixedly connected to the second limiting block 29. The upper side of the vertical plate 3 has a second limiting groove 30. The second limiting block 29 is adapted to the second limiting groove 30. The second limiting block 29 is located in the second limiting groove 30 and is slidably connected to the second limiting groove 30, so that the L-shaped plate 4 cannot be separated from the vertical plate 3. The lower side of the adjusting plate 5 is fixedly connected to the rubber block 31.

[0039] The L-shaped plate 4 has a protrusion 32 on one side, which corresponds to the rubber block 31. The rectangular base has a rectangular groove 33, and the L-shaped plate 4 and the protrusion 32 can be inserted into the corresponding rectangular groove 33. The top surface of the protrusion 32 is flush with the top surface of the rectangular base.

[0040] The vertical plate 3 fixes two extension plates 34, and the two extension plates 34 are rotatably connected to a roller 35. The L-shaped plate 4 is connected to a wire 36, which passes around the roller 35 and extends downward. The extended end of the wire 36 is connected to a counterweight 37. When the L-shaped plate 4 and the protrusion 32 are completely inserted into the rectangular groove 33, the second limiting block 29 contacts the side of the second limiting groove 30 away from the counterweight 37.

[0041] Working principle:

[0042] The metal plate is placed on the rectangular base, and the rubber blocks 31 in four directions move down and press against the upper side of the metal plate. With the protrusions 32 on the L-shaped plate 4, the metal plate is locked by the fasteners 7 to achieve a tight clamping. At the same time, the counterweights 37 in each direction have an outward pulling force on the metal plate under the action of gravity.

[0043] During processing, the metal sheet expands outward due to thermal expansion. This expansion, combined with the outward pulling force, ensures a tight clamping of the metal sheet while allowing it to expand outward due to thermal expansion.

[0044] It should be noted that if the metal plate is clamped by the rubber block 31 and the protrusion 32, and both the rubber block 31 and the protrusion 32 can slide, it is easy to become unstable during the processing. Therefore, a counterweight block 37 that pulls in four directions is added to stabilize the metal plate.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A non-marking clamping device for thin and light metal plates, characterized in that, The processing base includes a processing base plate (1) and a processing base (2) fixed on the processing base plate (1). Both the processing base plate (1) and the processing base (2) are rectangular in shape and have four sides. A pressing component is provided on each side. The pressing component can be adjusted up and down to press and clamp the thin metal plate placed on the processing base (2) downward. When the thin metal plate is stretched outward due to the cutting force and thermal stress generated by processing, the corresponding pressing component allows the thin metal plate to stretch outward in a direction away from the processing base (2). The pressing component includes a vertical plate (3) fixed on the processing base plate (1), an L-shaped plate (4) is provided on the vertical plate (3), the L-shaped plate (4) is slidably connected to an adjusting plate (5), the L-shaped plate (4) is fixedly connected to the vertical plate (3), the adjusting plate (5) is fixedly connected to a fixing plate (13), two connecting blocks (14) are fixedly connected to the lower side of the fixing plate (13), a roller (15) is rotatably connected between the two connecting blocks (14), and a rubber ring (16) is fixedly sleeved on the outer wall of the roller (15). The connecting block (14) has a through-hole (17) and a circular receiving groove (18) inside it. The receiving groove (18) is coaxial with the through-hole (17). The through-hole (17) is slidably connected to the rotating shaft (19). A first ring (20) and a second ring (21) are provided inside the receiving groove (18). The first ring (20) is fixedly connected to the inner wall of the receiving groove (18). The inner ring of the first ring (20) is slidably connected to the outer wall of the rotating shaft (19). The inner ring of the second ring (21) is fixedly connected to the outer wall of the rotating shaft (19). A compression spring (22) is sleeved on the outer wall of the rotating shaft (19). The two ends of the compression spring (22) are in contact with the second ring body (21) and the receiving groove (18) respectively. Multiple inclined grooves (23) are equidistantly opened on the circumference of the side of the first ring body (20) that is in contact with the second ring body (21). Multiple inclined bodies (24) are fixedly connected equidistantly on the circumference of the side of the second ring body (21) that is in contact with the first ring body (20). The inclined bodies (24) are adapted to the inclined grooves (23) so that the inclined bodies (24) can be just inserted into the inclined grooves (23). The inclined grooves (23) have a first straight surface (25) and a first inclined surface (26). The inclined bodies (24) have a second straight surface (27) and a second inclined surface (28).

2. The thin metal plate non-marking clamping device according to claim 1, characterized in that, A threaded rod (6) is fixedly connected to the L-shaped plate (4). The threaded rod (6) passes through the adjusting plate (5) above it. A fastener (7) is threadedly connected to the outer wall of the threaded rod (6). The fastener (7) is located on the upper side of the adjusting plate (5). The fastener (7) includes a rotating ring (8) and two mating blocks (9) that are inclinedly fixed on the rotating ring (8). The inner wall of the rotating ring (8) has an internal thread (10) that is threadedly connected to the threaded rod (6).

3. The non-marking clamping device for thin metal plates according to claim 2, characterized in that, The L-shaped plate (4) has a first limiting groove (11), and the adjusting plate (5) is fixedly connected to the first limiting block (12). The first limiting block (12) is adapted to the first limiting groove (11) and the first limiting block (12) is located in the first limiting groove (11) and is slidably connected to the first limiting groove (11).

4. The non-marking clamping device for thin metal plates according to claim 3, characterized in that, Alternatively, the L-shaped plate (4) and the vertical plate (3) can be slidably limited together. The lower side of the L-shaped plate (4) is fixedly connected to the second limiting block (29), and the upper side of the vertical plate (3) is provided with the second limiting groove (30). The second limiting block (29) is adapted to the second limiting groove (30), and the second limiting block (29) is located in the second limiting groove (30) and slidably connected to the second limiting groove (30).

5. The thin metal plate non-marking clamping device according to claim 4, characterized in that, The L-shaped plate (4) has a protrusion (32) on one side, and the lower side of the adjusting plate (5) is fixedly connected to a rubber block (31). The protrusion (32) corresponds to the rubber block (31). The processing base (2) has a rectangular groove (33). The L-shaped plate (4) and the protrusion (32) can extend into the corresponding rectangular groove (33), and the top surface of the protrusion (32) is flush with the top surface of the processing base (2).

6. The thin metal plate non-marking clamping device according to claim 5, characterized in that, The vertical plate (3) fixes two extension plates (34), and a circular roller (35) is rotatably connected between the two extension plates (34). The L-shaped plate (4) connects to a wire (36), which passes around the circular roller (35) and extends downward. The extended end of the wire (36) is connected to a counterweight (37). When the L-shaped plate (4) and the protrusion (32) are completely inserted into the rectangular groove (33), the second limiting block (29) contacts the side of the second limiting groove (30) away from the counterweight (37).

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