Laser plasma additive composite welding device

Abstract

The invention discloses a laser plasma additive composite welding device which comprises a workbench, a moving mechanism, a composite welding assembly and a rolling device, the moving mechanism comprises a transverse moving device, a longitudinal moving device, a vertical moving device and a portal frame, and a mounting part is arranged on a movable part of the vertical moving device; the composite welding assembly and the rolling device are arranged on the installation part at intervals, the composite welding assembly comprises a laser welding head and a plasma welding head, the rolling device comprises a support, a roller part and an elastic part, the upper portion of the support is connected with the installation part, the lower portion of the support is movably connected with a movable strip, and the movable strip is provided with a rotating shaft for being rotationally connected with the roller part. The elastic piece acts between the support and the movable strip, and the roller piece is sleeved with a heat-resisting ceramic sleeve. According to the plate-shaped part repairing device, the pressing roller device is driven by the moving mechanism to move, and the repairing material is pressed into the molten pool in a rolling mode, so that the damaged area of the plate-shaped part is fully filled with the repairing material, and the quality of the repaired plate-shaped part is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of material welding, and in particular to a laser plasma additive composite welding device. Background Art

[0002] Currently, existing methods for additive manufacturing of metal materials primarily employ methods such as laser welding, arc welding, and plasma beam heating to heat and build up metal materials, thereby achieving additive manufacturing or additive repair of parts. In additive remanufacturing and repair of parts, a welding heat source is used to heat the damaged area of ​​the part to form a molten pool, and then a repair material is added to the molten pool to achieve shape repair of the damaged area. Existing hybrid welding equipment, to meet different welding requirements, includes a welding assembly and a workbench. The welding assembly includes a laser welding head and a plasma welding head, and hybrid welding is performed using laser welding, plasma welding, or both. For example, patent application number CN110587137B discloses a hybrid welding head for aluminum alloys, comprising a welding head body, the welding head body being provided with a compression nozzle, the welding head body being provided with a laser beam channel and two electrode accommodating cavities for respectively accommodating two electrodes of opposite polarity, the laser beam channel having a laser beam outlet, each electrode accommodating cavity having an electrode outlet, the laser beam outlet and each electrode outlet facing the compression nozzle, and the compression nozzle having a composite arc outlet for ejecting the laser beam and the plasma arc.

[0003] However, the existing composite welding equipment does not perform flattening treatment after additive repair of plate-like parts, resulting in insufficient filling of the damaged area of ​​the plate-like parts with the repair material. This causes cold welds in the damaged area of ​​the plate-like parts and unevenness on the repaired surface, making it difficult to ensure the quality of the repaired plate-like parts. Summary of the Invention

[0004] The purpose of the present invention is to design a laser plasma additive composite welding device to address the shortcomings of the above-mentioned technology. The moving mechanism drives the pressure roller device to move, and presses the repair material into the molten pool by rolling, so that the repair material is fully filled in the damaged area of ​​the plate-like parts, thereby ensuring the quality of the repaired plate-like parts.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a laser plasma additive composite welding device, comprising a workbench, a moving mechanism, a composite welding assembly and a rolling device;

[0006] The moving mechanism includes a transverse moving device, a longitudinal moving device, a vertical moving device and a gantry. The movable end of the longitudinal moving device is connected to the lower part of the gantry. The transverse moving device is installed on the upper part of the gantry. The movable part of the transverse moving device is connected to the vertical moving device. The movable part of the vertical moving device is provided with a mounting piece. The composite welding assembly and the roller pressing device are spaced apart and arranged on the mounting piece.

[0007] The hybrid welding assembly includes a laser welding head and a plasma welding head, the laser welding head and the plasma welding head are spaced apart and arranged at the lower part of the mounting member, the emitting end of the laser welding head emits a laser beam, and the emitting end of the plasma welding head emits a plasma beam, the laser welding head is arranged vertically, and the plasma welding head is arranged obliquely so that the laser beam and the plasma beam interact and reach the same welding point;

[0008] The rolling device includes a bracket, a roller member and an elastic member. The upper part of the bracket is connected to the mounting member, and the lower part of the bracket is movably connected to a movable bar. The movable bar is provided with a rotating shaft for the roller member to be rotatably connected. The elastic member acts between the bracket and the movable bar to make the roller member tend to move toward the workbench. The roller member is sleeved with a heat-resistant ceramic sleeve.

[0009] Preferably, the movable part of the lateral moving device is provided with a mounting frame that is slidably connected to the gantry, the lateral moving device is a screw motor, the screw of the lateral moving device is threadedly engaged with the mounting frame, the mounting frame is movably connected to a rotation drive device, the vertical moving device is installed on the mounting frame, the movable part of the vertical moving device is fixedly connected to the lower part of the rotation drive device, and the movable part of the rotation drive device is connected to the mounting member.

[0010] Preferably, a guide ring is provided at the lower portion of the mounting frame, the rotation drive device is slidably connected in the guide ring, and a limiting portion is provided at the upper portion of the rotation drive device.

[0011] Preferably, the mounting member is provided with a travel bar, the bracket is a U-shaped frame, the two forked ends of the upper part of the bracket are provided with a locking sleeve that is sleeved on the travel bar, the locking sleeve is provided with a locking member, and the locking member passes through the part of the locking sleeve and is locked with the travel bar.

[0012] Preferably, the travel bar is formed with at least one mating surface, the mating surface extends along the length direction of the travel bar, and the inner wall of the locking sleeve is in contact with the mating surface.

[0013] Preferably, a sliding hole for sliding connection of the movable bar is passed through the lower part of the bracket, and a limiting groove for movement of the travel bar is passed through the upper part of the movable bar, and the inner groove wall of the limiting groove is in contact with the matching surface.

[0014] Preferably, a receiving groove is provided at the lower portion of the bracket, a driving portion is provided at the lower portion of the movable bar, and two ends of the elastic member respectively abut and cooperate with opposite sides of the receiving groove and the driving portion.

[0015] Preferably, a positioning portion is provided on the upper portion of the movable bar located inside the bracket.

[0016] Preferably, the travel bar is provided with a plurality of locking grooves distributed in a linear array, the locking member is a bolt structure, the locking sleeve is penetrated by a fixing hole for the locking member to be bolted, and the rod of the locking member is inserted into the corresponding locking groove through the fixing hole.

[0017] Preferably, the rotary drive device is sleeved with a transparent protective cover, and a mounting block is provided at the lower part of the rotary drive device. The mounting block is located below the movable part of the vertical moving device, and the mounting block is in contact with the inner cavity wall of the protective cover. The protective cover covers the rolling device and the composite welding assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention relates to a laser plasma additive composite welding device. The top surface of the workbench is used to place plate-like parts. The composite welding assembly is driven by a moving mechanism to move in three dimensions so as to move the composite welding assembly to the damaged area of ​​the plate-like part. The arrangement of the laser welding head and the plasma welding head allows the operator to select laser welding, plasma welding, or a combination of the two according to the process requirements of the additive cladding of the plate-like part. During the cladding process, under the action of the elastic member, the roller member moves close to the plate-like part so that the heat-resistant ceramic sleeve is pressed against the plate-like part, thereby assisting in fixing the position of the plate-like part on the workbench and maintaining the welding point of the composite welding assembly corresponding to the damaged area of ​​the plate-like part. To ensure the stability of the surfacing operation of the composite welding device, after the damaged area of ​​the plate-like part is heated to form a molten pool, the staff fills the repair material in the molten pool of the plate-like part, and adjusts the distance between the mounting part and the workbench by starting the vertical moving device to extend or retract, thereby adjusting the degree of downward pressure of the roller on the plate-like part. The mounting part is driven to move horizontally and vertically on the workbench through the horizontal moving device and the vertical moving device, so that the heat-resistant ceramic sleeve passes back and forth through the damaged area of ​​the plate-like part and flattens it multiple times. The repair material is pressed into the molten pool by rolling, so that the repair material is fully filled in the damaged area of ​​the plate-like part, thereby ensuring the quality of the repaired plate part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 2 is a schematic structural diagram of the composite welding device in the embodiment;

[0021] Figure 2 is a cross-sectional view of the composite welding device in the embodiment;

[0022] Figure 3 yes Figure 2 Enlarged view of area A in the middle;

[0023] Figure 4 2 is a cross-sectional view of the travel bar and the locking sleeve in the embodiment.

[0024] In the figure: 1. Plate-shaped parts; 2. Repair materials; 3. Workbench; 4. Horizontal moving device; 5. Longitudinal moving device; 6. Vertical moving device; 7. Gantry; 8. Mounting parts; 9. Laser welding head; 10. Plasma welding head; 11. Laser beam; 12. Plasma beam; 13. Bracket; 14. Roller parts; 15. Elastic parts; 16. Movable bar; 17. Rotating shaft; 18. Heat-resistant ceramic sleeve; 19. Mounting frame; 20. Rotary drive device; 21. Guide ring; 22. Limiting part; 23. Travel bar; 24. Locking sleeve; 25. Matching surface; 26. Slide hole; 27. Limiting groove; 28. Storage groove; 29. ​​Driving part; 30. Positioning part; 31. Locking groove; 32. Fixing hole; 33. Protective cover; 34. Mounting block; 35. Longitudinal slide rail; 36. Horizontal slide rail; 37. Controller; 38. Locking part. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 A laser plasma additive composite welding device includes a workbench 3, a moving mechanism, a composite welding assembly, and a rolling device. The moving mechanism includes a transverse moving device 4, a longitudinal moving device 5, a vertical moving device 6, and a gantry 7. The transverse moving device 4 and the longitudinal moving device 5 are both screw motors, and the vertical moving device 6 is a pneumatic cylinder or electric push rod. The opposite sides of the bottom end of the gantry 7 are slidably connected to the workbench 3 via longitudinal slide rails 35. The movable portion of the longitudinal moving device 5 is connected to the lower portion of the gantry 7 and engages with the screw thread. The longitudinal moving device 5 includes two screw motors symmetrically arranged on the workbench 3 to drive the gantry 7 for longitudinal movement.

[0027] The transverse moving device 4 is installed on the upper part of the gantry 7. The movable part of the transverse moving device 4 is provided with a mounting frame 19 that is slidably connected to the gantry 7. The upper part of the gantry 7 is provided with a transverse slide rail 36 for sliding connection of the mounting frame 19. The screw rod of the transverse moving device 4 is threadedly matched with the mounting frame 19. The lower part of the mounting frame 19 is provided with a guide ring 21. The guide ring 21 is slidably connected to the rotary drive device 20. The upper part of the rotary drive device 20 is provided with a limiting portion 22 for limiting the vertical movement of the rotary drive device 20 and preventing the rotary drive device 20 from escaping from the guide ring.

[0028] The rotary drive device 20 is a rotary motor, and the vertical moving device 6 is installed on the mounting frame 19. The movable part of the vertical moving device 6 is fixedly connected to the lower part of the rotary drive device 20. The cavity between the mounting frame 19 and the guide is used for the vertical movement of the rotary drive device 20. The movable part of the rotary drive device 20 is provided with a mounting part 8, and the composite welding assembly and the rolling device are arranged on the mounting part 8 at intervals.

[0029] The workbench 3 is provided with a controller 37. The moving mechanism, the composite welding assembly and the rolling device are all connected to and controlled by the controller 37. When the composite welding device is in use, the top surface of the workbench 3 is provided for the plate-like part 1 to be placed. The staff operates the moving mechanism through the controller 37 to drive the composite welding assembly and the rolling device to move in three dimensions, so as to move the composite welding assembly to a position corresponding to the damaged area of ​​the plate-like part 1.

[0030] The composite welding assembly includes a laser welding head 9 and a plasma welding head 10. The laser welding head 9 and the plasma welding head 10 are spaced apart at the lower part of the mounting part 8. The emitting end of the laser welding head 9 emits a laser beam 11, and the emitting end of the plasma welding head 10 emits a plasma beam 12. The laser welding head 9 is vertically arranged, and the plasma welding head 10 is tilted so that the laser beam 11 and the plasma beam 12 interact with each other to the same welding point. The arrangement of the laser welding head 9 and the plasma welding head 10 allows the staff to select laser welding, plasma welding, or a combination of the two composite welding according to the process requirements of the additive surfacing of the plate-like part 1. After the composite welding assembly heats the damaged area of ​​the plate-like part 1 to form a molten pool, the staff closes the composite welding assembly and moves the rolling device through the moving mechanism so that the staff can fill the repair material 2 in the molten pool of the plate-like part 1.

[0031] The rolling device includes a bracket 13, a roller member 14 and an elastic member 15. The upper part of the bracket 13 is connected to the mounting member 8, and the lower part of the bracket 13 is movably connected to a movable bar 16. The movable bar 16 is provided with a rotating shaft 17 for the roller member 14 to be rotatably connected. The lower part of the bracket 13 is penetrated by a sliding hole 26 for the movable bar 16 to be slidably connected. The lower part of the bracket 13 is provided with a receiving groove 28, and the lower part of the movable bar 16 is provided with a driving part 29. The two ends of the elastic member 15 respectively interfere with the opposite sides of the receiving groove 28 and the driving part 29. The elastic member 15 acts between the bracket 13 and the movable bar 16 to make the roller member 14 have a tendency to move toward the workbench 3. The roller member 14 is sleeved with a heat-resistant ceramic sleeve 18.

[0032] After the staff fills the molten pool of the plate-shaped part 1 with the repair material 2, the mounting part 8 can be driven to move horizontally and vertically on the workbench 3 through the horizontal moving device 4 and the vertical moving device 5, so that the heat-resistant ceramic sleeve 18 can reciprocate through the damaged area of ​​the plate-shaped part 1 and flatten it multiple times, and press the repair material 2 into the molten pool by rolling. During the flattening process, the staff can also start the rotary drive device 20 through the controller 37 to drive the mounting part 8 to rotate circumferentially to adjust the angular position of the roller part 14, so that the heat-resistant ceramic sleeve 18 can flatten the damaged area of ​​the plate-shaped part 1 from different directions, so that the repair material 2 is fully filled in the damaged area of ​​the plate-shaped part 1, thereby ensuring the quality of the repaired plate part 1.

[0033] The rotary drive device 20 is sleeved with a transparent protective cover 33. A mounting block 34 is provided at the lower part of the rotary drive device 20. The mounting block 34 is located below the movable part of the vertical moving device 6. The mounting block 34 cooperates with the inner cavity wall of the protective cover 33 to prevent the protective cover 33 from detaching from the rotary drive device 20. The protective cover 33 covers the roller pressing device and the composite welding assembly so that the roller pressing device and the composite welding assembly can move in the protective cover 33. The protective cover 33 is made of heat-resistant glass or heat-resistant plastic material so that the staff can observe the welding operation of the composite welding assembly and the flattening operation of the roller pressing device through the protective cover 33.

[0034] The mounting member 8 is provided with a travel bar 23, which is symmetrically formed with two mating surfaces 25. The mating surfaces 25 extend along the length of the travel bar 23. A limiting groove 27 is formed through the upper portion of the movable bar 16 for the movement of the travel bar 23. The inner groove wall of the limiting groove 27 contacts the mating surface 25 to cooperate with the sliding hole 26 to guide the sliding of the movable bar 16 and maintain the movable bar 16 in a vertical position. The upper portion of the movable bar 16, located within the bracket 13, is provided with a positioning portion 30 to limit the sliding of the movable bar 16 and prevent it from disengaging from the sliding hole 26.

[0035] By using controller 37 to activate the extension or retraction of vertical movement device 6, the operator can drive the rotary drive device 20 to slide within the guide ring, thereby adjusting the spacing between mounting member 8 and workbench 3. This allows the composite welding assembly and roller pressing device to move closer to or further away from the top surface of workbench 3, thereby adjusting the degree of downward pressure exerted by roller member 14 on plate-like component 1. Heat-resistant ceramic sleeve 18 is tightly pressed against plate-like component 1, while roller member 14 assists in securing the position of plate-like component 1 on workbench 3. This ensures that the weld point of the composite welding assembly corresponds to the damaged area of ​​plate-like component 1 during the cladding process, ensuring the stability of the cladding operation of the composite welding device.

[0036] Bracket 13 is a U-shaped frame. Both bifurcated ends of the upper portion of bracket 13 are equipped with locking sleeves 24 that fit over travel bar 23. The inner wall of locking sleeve 24 engages with mating surface 25, preventing the locking bar from rotating on travel bar 23. The interlocking connection between locking sleeve 24 and travel bar 23 allows for adjustment of the spacing between bracket 13 and mounting member 8, allowing personnel to adjust the spacing between the roller press device and the composite welding assembly as needed. Locking member 38 is mounted on locking sleeve 24. Travel bar 23 defines a plurality of locking slots 31 arranged in a linear array. Locking member 38 is a bolted structure. Fixing holes 32 are formed through locking sleeve 24 for bolting of locking member 38. The rod of locking member 38, which passes through fixing hole 32, is inserted into the corresponding locking slot 31 to secure the roller press device in position on travel bar 23.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A laser plasma additive composite welding device, characterized by: It includes a workbench (3), a moving mechanism, a composite welding assembly and a rolling device; The moving mechanism comprises a transverse moving device (4), a longitudinal moving device (5), a vertical moving device (6) and a gantry (7); the movable end of the longitudinal moving device (5) is connected to the lower part of the gantry (7); the transverse moving device (4) is installed on the upper part of the gantry (7); the movable part of the transverse moving device (4) is connected to the vertical moving device (6); the movable part of the vertical moving device (6) is provided with a mounting member (8); the composite welding assembly and the roller pressing device are arranged on the mounting member (8) at intervals; The composite welding assembly comprises a laser welding head (9) and a plasma welding head (10), wherein the laser welding head (9) and the plasma welding head (10) are spaced apart and arranged at the lower part of the mounting member (8); the emission end of the laser welding head (9) emits a laser beam (11), and the emission end of the plasma welding head (10) emits a plasma beam (12); the laser welding head (9) is arranged vertically, and the plasma welding head (10) is arranged tilted, so that the laser beam (11) and the plasma beam (12) interact with each other to reach the same welding point; The rolling device comprises a bracket (13), a roller member (14) and an elastic member (15). The upper part of the bracket (13) is connected to the mounting member (8). The lower part of the bracket (13) is movably connected to a movable bar (16). The movable bar (16) is provided with a rotating shaft (17) for the roller member (14) to be rotatably connected. The elastic member (15) acts between the bracket (13) and the movable bar (16) so that the roller member (14) has a tendency to move toward the workbench (3). The roller member (14) is sleeved with a heat-resistant ceramic sleeve (18).

2. The laser plasma additive composite welding device according to claim 1, characterized in that: The movable portion of the transverse moving device (4) is provided with a mounting frame (19) that is slidably connected to the gantry (7); the transverse moving device (4) is a screw motor; the screw of the transverse moving device (4) is threadedly engaged with the mounting frame (19); the mounting frame (19) is movably connected to a rotation drive device (20); the vertical moving device (6) is mounted on the mounting frame (19); the movable portion of the vertical moving device (6) is fixedly connected to the lower portion of the rotation drive device (20); and the movable portion of the rotation drive device (20) is connected to the mounting member (8).

3. The laser plasma additive composite welding device according to claim 2, characterized in that: A guide ring (21) is provided at the lower portion of the mounting frame (19), the rotary drive device (20) is slidably connected in the guide ring (21), and a limiting portion (22) is provided at the upper portion of the rotary drive device (20).

4. The laser plasma additive composite welding device according to claim 1, characterized in that: The mounting member (8) is provided with a travel bar (23), the bracket (13) is a U-shaped bracket, and the two forked ends of the upper portion of the bracket (13) are provided with a locking sleeve (24) sleeved on the travel bar (23), and the locking sleeve (24) is provided with a locking member (38), and the locking member (38) passes through the portion of the locking sleeve (24) and is locked with the travel bar (23).

5. The laser plasma additive composite welding device according to claim 4, characterized in that: The travel bar (23) is formed with a matching surface (25), and the matching surface (25) extends along the length direction of the travel bar (23), and the inner wall of the locking sleeve (24) is in contact with the matching surface (25).

6. The laser plasma additive composite welding device according to claim 5, characterized in that: The lower part of the bracket (13) is penetrated by a sliding hole (26) for the sliding connection of the movable bar (16), and the upper part of the movable bar (16) is penetrated by a limiting groove (27) for the movement of the travel bar (23), and the inner groove wall of the limiting groove (27) is in contact with the matching surface (25).

7. The laser plasma additive composite welding device according to claim 6, characterized in that: The lower portion of the bracket (13) is provided with a receiving groove (28), the lower portion of the movable bar (16) is provided with a driving portion (29), and the two ends of the elastic member (15) respectively contact and cooperate with the opposite sides of the receiving groove (28) and the driving portion (29).

8. The laser plasma additive composite welding device according to claim 6, characterized in that: The upper portion of the movable bar (16) located inside the bracket (13) is provided with a positioning portion (30).

9. The laser plasma additive composite welding device according to claim 4, characterized in that: The travel bar (23) is provided with a plurality of locking grooves (31) distributed in a linear array, the locking member (38) is a bolt structure, the locking sleeve (24) is penetrated by a fixing hole (32) for the locking member (38) to be bolted, and the rod of the locking member (38) is inserted into the corresponding locking groove (31) through the fixing hole (32).

10. The laser plasma additive composite welding device according to claim 2, characterized in that: The rotary drive device (20) is sleeved with a transparent protective cover (33). A mounting block (34) is provided at the lower portion of the rotary drive device (20). The mounting block (34) is located below the movable portion of the vertical moving device (6). The mounting block (34) is in contact with the inner cavity wall of the protective cover (33). The protective cover (33) covers the roller pressing device and the composite welding assembly.

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