Clamping and positioning device for plasma cutting of aluminum profile

Abstract

The invention relates to the technical field of aluminum profile plasma cutting, in particular to a clamping and positioning device for aluminum profile plasma cutting, which comprises a machine tool frame, a cross beam is fixedly connected to the top of the machine tool frame, a mobile device is slidably connected to the top of the cross beam, a plasma cutting gun is mounted on the mobile device, and a floating groove is formed in the plasma cutting gun. The floating head is slidably connected with the interior of the plasma cutting gun through the floating groove. The problem of cutting vibration is solved through a dual passive self-adaptive mechanism, when a cutting head is separated from a plate to generate recoil force, the recoil force is converted into instantly-increased clamping force through a floating head and a lever gear mechanism, and vibration of a workpiece is effectively restrained; when the cutting head makes contact with the plate again, plasma arc radiant heat is used for driving the shape memory alloy wire to contract, the workpiece is inclined through the traction mechanism to achieve angle cutting, vertical impact is converted into smooth transition, and the cutting opening quality and the machining efficiency of hollowed-out plate cutting are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting technology for aluminum profiles, and in particular to a clamping and positioning device for plasma cutting of aluminum profiles. Background Technology

[0002] In the plasma cutting process of aluminum profiles, there is a significant technical bottleneck when processing profiles with hollow structures. When the cutting head moves from the solid area to the hollow area during translation, or when it re-contacts the profile from the hollow area, the load of the plasma arc will change drastically. At the moment of separation, the arc will generate a strong recoil force due to being suspended, while the re-contact will form a rigid impact. Both of these working conditions will cause severe vibration of the cutting system and the workpiece, resulting in defects such as chipping and diagonal lines on the cut, which seriously affects the cutting accuracy and surface quality of the aluminum profile.

[0003] Traditional clamping and positioning devices are always in a passive fixed state and cannot respond to the dynamic impact force during processing. They cannot effectively suppress vibration at critical moments, causing the aluminum profile to shift or deform. Therefore, a clamping and positioning device for plasma cutting of aluminum profiles is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art by providing a clamping and positioning device for plasma cutting of aluminum profiles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A clamping and positioning device for plasma cutting of aluminum profiles includes a machine frame, a crossbeam fixedly connected to the top of the machine frame, a mobile device slidably connected to the top of the crossbeam, a plasma cutting gun mounted on the mobile device, a floating groove opened inside the plasma cutting gun, a floating head slidably connected to the inside of the plasma cutting gun through the floating groove, and a first spring fixedly connected between the plasma cutting gun and the floating head. Both sides of the machine tool frame are fixed with bearing rods. Two fixed blocks are set above one of the bearing rods. A first shaft is rotatably connected between the two fixed blocks. Support plates are set above the two bearing rods. A bearing frame is fixed between the two support plates. The outer wall of the first shaft is fixed to one of the support plates. A pull rope is fixed to the top of the other support plate. A fixed plate is set above the other support plate. The pull rope passes through the fixed plate and the support plate. The outer wall of the plasma cutting gun is fixed with a bracket, and the bottom of the bracket is rotatably connected to an L-shaped lever. One end of the L-shaped lever is rotatably connected to the floating head.

[0006] Preferably, a horizontal plate is fixed between the load-bearing frames, and a mounting frame is fixed to one side of the horizontal plate. Several sets of evenly distributed anti-vibration mechanisms are provided on the mounting frame.

[0007] Preferably, each shock-absorbing mechanism includes an upper clamping block, which is slidably connected to the mounting frame. A connecting plate is fixedly connected to one side of the upper clamping block, and an upper support plate is fixedly connected to one side of the connecting plate. A flap is rotatably connected to the bottom end of the upper support plate through a set shaft, and torsion springs are fixedly connected to both sides of the flap and the upper support plate.

[0008] Preferably, a rack is fixed to the bottom of the flap near the support frame, a gear is engaged on the outer wall of the rack, and a rack is engaged on the other side of the outer wall of the gear.

[0009] Preferably, rack one is rotatably connected to a lower support plate via a set shaft, the lower support plate is fixedly connected to the bearing frame, rack two is fixedly connected to a lower connecting plate on one side, and a lower clamping block is fixedly connected to the end of the lower connecting plate.

[0010] Preferably, the lower clamping block is slidably connected to the support frame, and the lower clamping block is located below the upper clamping block.

[0011] Preferably, a heat-conducting cover is provided below the support frame, and the two ends of the heat-conducting cover are fixedly connected to the machine tool frame. A hollow plate is fixedly connected inside the heat-conducting cover, and an SMA filament bundle is provided below each flap. The two SMA filament bundles are connected by a pull rope.

[0012] Preferably, the SMA filament bundles at both ends are fixedly connected to the perforated plate and the pull rope, respectively.

[0013] Compared with existing technologies, the advantages of this invention are as follows: By utilizing the recoil force generated when the cutting head leaves the sheet metal through mechanisms such as a floating head and an L-shaped lever, the instantaneous opposite movement of the upper and lower clamping blocks and emergency strong clamping are achieved, thereby solving the problem of severe vibration and displacement of the workpiece caused by recoil force and ensuring the accuracy of the cutting path. By integrating a heat-conducting cover, shape memory alloy wire bundle, and a rope-supporting mechanism, the radiant heat energy of the plasma arc when the cutting head approaches the plate is utilized to achieve active tilting of the workpiece, forming an angled cut. This solves the problem of vertical impact when the cutting head re-contacts the plate, transforming vertical impact into a smooth transition, weakening the impact from the source, and fundamentally protecting the cut quality. After the cutting is completed, the flip plate can push the material out directly without disassembling the clamps. The flip plate automatically flips over under the pushing force to make way, which greatly simplifies the operation process and improves production efficiency. In summary, this invention solves the problem of cutting vibration through a dual passive adaptive mechanism. When the cutting head detaches from the sheet metal and generates a recoil force, the floating head and lever gear mechanism convert this force into an instantaneously increased clamping force, effectively suppressing workpiece vibration. When the cutting head re-contacts the sheet metal, the shape memory alloy wire is driven to contract by the radiation heat of the plasma arc. The traction mechanism tilts the workpiece to achieve angled entry, transforming the vertical impact into a smooth transition, significantly improving the cut quality and processing efficiency of hollow sheet metal cutting. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is the present invention. Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the cutting of the perforated plate of the present invention; Figure 4 This is the present invention. Figure 3 Schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the structure of the plasma cutting gun of the present invention; Figure 6 This is the present invention. Figure 5 Schematic diagram of the structure at point C; Figure 7 This is a schematic diagram of the structure at the clamping block of the present invention; Figure 8 This is a schematic diagram of the structure of the flap section of the present invention; Figure 9 This is a schematic diagram of the structure of the heat-conducting cover of the present invention; Figure 10 This is the present invention. Figure 9 Schematic diagram of the structure at point D.

[0015] In the diagram: 1. Machine tool frame; 2. Bearing frame; 3. Mounting bracket; 4. Crossbeam; 5. Moving equipment; 6. Plasma cutting gun; 7. Fixing plate; 8. Support plate; 9. Bearing rod; 10. Horizontal plate; 11. Pull rope one; 12. First shaft; 13. Fixing block; 14. Upper clamping block; 15. SMA filament bundle; 16. First spring; 17. Floating groove; 18. Bracket; 19. L-shaped lever; 20. Floating head; 21. Connecting plate one; 22. Upper support plate; 23. Torsion spring; 24. Flip plate; 25. Lower support plate; 26. Pull rope two; 27. Hollow plate; 28. Lower connecting plate; 29. ​​Rack one; 30. Gear; 31. Rack two; 32. Heat conduction cover; 33. Lower clamping block. Detailed Implementation

[0016] 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.

[0017] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] Reference Figure 1 - Figure 10 A clamping and positioning device for plasma cutting of aluminum profiles includes a machine frame 1, a crossbeam 4 fixedly connected to the top of the machine frame 1, a mobile device 5 slidably connected to the top of the crossbeam 4, a plasma cutting gun 6 mounted on the mobile device 5, a floating groove 17 opened inside the plasma cutting gun 6, a floating head 20 slidably connected to the inside of the plasma cutting gun 6 through the floating groove 17, a first spring 16 fixedly connected between the plasma cutting gun 6 and the floating head 20, a bracket 18 fixedly connected to the outer wall of the plasma cutting gun 6, an L-shaped lever 19 rotatably connected to the bottom end of the bracket 18, one end of the L-shaped lever 19 rotatably connected to the floating head 20, a cross plate 10 fixedly connected between the bearing frames 2, a mounting frame 3 fixedly connected to one side of the cross plate 10, and several sets of evenly distributed anti-vibration mechanisms provided on the mounting frame 3.

[0019] Each shock-absorbing mechanism includes an upper clamping block 14, which is slidably connected to the mounting frame 3. A connecting plate 21 is fixedly connected to one side of the upper clamping block 14, and an upper support plate 22 is fixedly connected to one side of the connecting plate 21. A flap 24 is rotatably connected to the bottom end of the upper support plate 22 through a set shaft. Torsion springs 23 are fixedly connected between both sides of the flap 24 and the upper support plate 22.

[0020] A rack 29 is fixedly connected to the bottom of the flap 24 near the support frame 2. A gear 30 meshes with the outer wall of the rack 29, and a rack 31 meshes with the outer wall of the other side of the gear 30.

[0021] Rack 1 29 is rotatably connected to a lower support plate 25 via a set shaft. The lower support plate 25 is fixedly connected to the bearing frame 2. A lower connecting plate 28 is fixedly connected to one side of rack 2 31, and a lower clamping block 33 is fixedly connected to the end of the lower connecting plate 28.

[0022] The lower clamping block 33 is slidably connected to the support frame 2, and the lower clamping block 33 is located below the upper clamping block 14.

[0023] In this embodiment, the hollowed-out aluminum profile plate is placed on the support frame 2. The mobile device 5 drives the plasma cutting gun 6 to move along the crossbeam 4 to cut the hollowed-out aluminum profile plate. When the plasma cutting gun 6, with the floating head 20, moves from the plate surface to the hollowed-out area, the metal plate suddenly disappears, and the plasma arc has no support, resulting in a sharp increase in arc length and generating a recoil force. At this time, the floating head 20 is subjected to the recoil force and moves upward, driving the L-shaped lever 19. At this time, the power arm of the L-shaped lever 19 transmits the force through the fulcrum to the resistance arm, which abuts against the connecting plate 21, thereby pressing down the upper clamping block 14. The connecting plate 21 drives the rack 29 through the upper support plate 22 and the flip plate 24. The flip plate 24 is parallel to the upper support plate 22 by default due to the force of the torsion spring 23. The rack 29 is located above the gear 30, so the downward movement of the rack 29 just drives the gear 30 to rotate, which drives the lower clamping block 33 to move upward through the rack 31 and the lower connecting plate 28.

[0024] Damping rubber is installed on the opposite side of the lower clamping block 33 and the upper clamping block 14 to absorb vibration, thereby better preventing the vibration caused by the plasma cutting gun 6 from acting on the plate at the moment of separation, which would cause the plate to shift.

[0025] The machine tool frame 1 has two bearing rods 9 fixedly connected to both sides. Two fixing blocks 13 are set above one of the bearing rods 9. A first shaft 12 is rotatably connected between the two fixing blocks 13. A support plate 8 is set above the two bearing rods 9. A bearing frame 2 is fixedly connected between the two support plates 8. The outer wall of the first shaft 12 is fixedly connected to one of the support plates 8. A pull rope 11 is fixedly connected to the top of the other support plate 8. A fixing plate 7 is set above the other support plate 8. The pull rope 11 passes through the fixing plate 7 and the support plate 8.

[0026] A heat-conducting cover 32 is provided below the support frame 2. The two ends of the heat-conducting cover 32 are fixedly connected to the machine tool frame 1. A hollow plate 27 is fixedly connected inside the heat-conducting cover 32. An SMA wire bundle 15 is provided below each flip plate 24. The two SMA wire bundles 15 are connected by a pull rope 26.

[0027] The SMA wire bundles 15 at both ends are fixed to the hollow plate 27 and the pull rope 11, respectively.

[0028] In this embodiment, when the plasma cutting gun 6 moves from the cutout back onto the plate, the plasma arc becomes larger at this time. The heat-conducting cover 32 located below the flip plate 24 transfers the heat of the plasma arc to the SMA wire bundle 15. The SMA wire bundle 15 uses multiple fine wires made of "high transition temperature nickel-titanium copper shape memory alloy", which are combined and used in parallel to provide sufficient and reliable working power while ensuring rapid thermal response.

[0029] At this time, the SMA filament bundle 15 shrinks due to heat, and pulls the support frame 2 through the pull rope 26 and pull rope 11. The direction of the pull force of the pull rope 11 is changed by the fixing plate 7, so that the support frame 2 tilts, thereby changing the contact surface between the plasma cutting gun 6 and the plate, realizing angled entry, turning the instantaneous vertical impact into a smooth and gradual contact process, which greatly weakens its impact force. When the plasma cutting gun 6 moves away from the SMA filament bundle 15, the heat source leaves, and the SMA filament bundle 15 shrinks and resets. A cooling jet mechanism can also be connected to the end of the heat conduction cover 32 to accelerate its cooling speed.

[0030] Once the mobile device 5 has moved completely once on the crossbeam 4, it can directly push the plate to move. The flip plate 24 will rotate automatically under the push force, without the need to repeatedly disassemble and remove the clamping tools.

[0031] The working principle and usage of this invention are explained in detail below: The hollowed-out aluminum profile plate is placed on the support frame 2. The mobile device 5 drives the plasma cutting gun 6 to move along the crossbeam 4 to cut the hollowed-out aluminum profile plate. When the plasma cutting gun 6, with the floating head 20, moves from the plate surface to the hollowed-out area, the metal plate suddenly disappears, and the plasma arc is unsupported, causing the arc length to increase sharply and generating a recoil force. At this time, the floating head 20 is subjected to the recoil force and moves upward, driving the L-shaped lever 19. At this time, the power arm of the L-shaped lever 19 transmits the force through the fulcrum to the resistance arm and abuts against the connecting plate 21, thereby pressing down the upper clamping block 14. The connecting plate 21 drives the rack 29 through the upper support plate 22 and the flip plate 24. The flip plate 24 is parallel to the upper support plate 22 by default due to the force of the torsion spring 23. The rack 29 is located above the gear 30, so the downward movement of the rack 29 just drives the gear 30 to rotate, and through the rack 21 and the lower connecting plate 28, it drives the lower clamping block 33 to move upward.

[0032] Damping rubber is installed on the opposite side of the lower clamping block 33 and the upper clamping block 14 to absorb vibration, thereby better preventing the vibration caused by the plasma cutting gun 6 from acting on the plate at the moment of separation, which would cause the plate to shift.

[0033] When the plasma cutting gun 6 moves from the cutout back onto the plate, the heat-conducting cover 32 located below the flip plate 24 transfers the heat of the plasma arc to the SMA wire bundle 15 because the plasma arc becomes larger at this time. The SMA wire bundle 15 uses multiple fine wires made of "high transition temperature nickel-titanium copper shape memory alloy", which are combined and used in parallel to provide sufficient and reliable working power while ensuring rapid thermal response.

[0034] At this time, the SMA filament bundle 15 shrinks due to heat, and pulls the support frame 2 through the pull rope 26 and pull rope 11. The direction of the pull force of the pull rope 11 is changed by the fixing plate 7, so that the support frame 2 tilts, thereby changing the contact surface between the plasma cutting gun 6 and the plate, realizing angled entry, turning the instantaneous vertical impact into a smooth and gradual contact process, which greatly weakens its impact force. When the plasma cutting gun 6 moves away from the SMA filament bundle 15, the heat source leaves, and the SMA filament bundle 15 shrinks and resets. A cooling jet mechanism can also be connected to the end of the heat conduction cover 32 to accelerate its cooling speed.

[0035] Once the mobile device 5 has moved completely once on the crossbeam 4, it can directly push the plate to move. The flip plate 24 will rotate automatically under the push force, without the need to repeatedly disassemble and remove the clamping tools.

[0036] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0037] 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 clamping and positioning device for plasma cutting of aluminum profiles, comprising a machine tool frame (1), characterized in that, A crossbeam (4) is fixedly connected to the top of the machine tool frame (1). A mobile device (5) is slidably connected to the top of the crossbeam (4). A plasma cutting gun (6) is installed on the mobile device (5). A floating groove (17) is opened inside the plasma cutting gun (6). The floating head (20) is slidably connected to the inside of the plasma cutting gun (6) through the floating groove (17). A first spring (16) is fixedly connected between the plasma cutting gun (6) and the floating head (20). The machine tool frame (1) has two bearing rods (9) fixed on both sides. Two fixing blocks (13) are set above one of the bearing rods (9). A first shaft (12) is rotatably connected between the two fixing blocks (13). A support plate (8) is set above the two bearing rods (9). A bearing frame (2) is fixed between the two support plates (8). The outer wall of the first shaft (12) is fixed to one of the support plates (8). A pull rope (11) is fixed to the top of the other support plate (8). A fixing plate (7) is set above the other support plate (8). The pull rope (11) passes through the fixing plate (7) and the support plate (8). A bracket (18) is fixed to the outer wall of the plasma cutting gun (6). An L-shaped lever (19) is rotatably connected to the bottom end of the bracket (18). One end of the L-shaped lever (19) is rotatably connected to the floating head (20).

2. The clamping and positioning device for plasma cutting of aluminum profiles according to claim 1, characterized in that: A horizontal plate (10) is fixed between the load-bearing frames (2), and a mounting frame (3) is fixed on one side of the horizontal plate (10). Several sets of evenly distributed anti-vibration mechanisms are provided on the mounting frame (3).

3. The clamping and positioning device for plasma cutting of aluminum profiles according to claim 2, characterized in that: Each shock-absorbing mechanism includes an upper clamping block (14), which is slidably connected to the mounting frame (3). A connecting plate (21) is fixedly connected to one side of the upper clamping block (14), and an upper support plate (22) is fixedly connected to one side of the connecting plate (21). A flap (24) is rotatably connected to the bottom end of the upper support plate (22) through a set shaft. Torsion springs (23) are fixedly connected between both sides of the flap (24) and the upper support plate (22).

4. A clamping and positioning device for plasma cutting of aluminum profiles according to claim 3, characterized in that: A rack (29) is fixed to the bottom of the flap (24) on one side near the bearing frame (2). A gear (30) meshes with the outer wall of the rack (29), and a rack (31) meshes with the outer wall of the gear (30) on the other side.

5. A clamping and positioning device for plasma cutting of aluminum profiles according to claim 4, characterized in that: Rack 1 (29) is rotatably connected to a lower support plate (25) via a set shaft. The lower support plate (25) is fixedly connected to the bearing frame (2). A lower connecting plate (28) is fixedly connected to one side of rack 2 (31), and a lower clamping block (33) is fixedly connected to the end of the lower connecting plate (28).

6. A clamping and positioning device for plasma cutting of aluminum profiles according to claim 5, characterized in that: The lower clamping block (33) is slidably connected to the support frame (2), and the lower clamping block (33) is located below the upper clamping block (14).

7. A clamping and positioning device for plasma cutting of aluminum profiles according to claim 6, characterized in that: A heat-conducting cover (32) is provided below the support frame (2). The two ends of the heat-conducting cover (32) are fixed to the machine tool frame (1). A hollow plate (27) is fixed inside the heat-conducting cover (32). An SMA wire bundle (15) is provided below each flip plate (24). The two SMA wire bundles (15) are connected by a pull rope (26).

8. A clamping and positioning device for plasma cutting of aluminum profiles according to claim 7, characterized in that: The SMA filament bundles (15) at both ends are fixed to the perforated plate (27) and the pull rope (11) respectively.

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