Automatic welding equipment for metal workpiece machining

Abstract

The invention discloses automatic welding equipment for metal workpiece machining, and relates to the technical field of welding, the automatic welding equipment comprises a base, two fixing seats and a welding machine, and further comprises a positioning mechanism; a pretreatment mechanism; the adjusting mechanism is used for driving the turntable to rotate; the interlayer welding auxiliary treatment mechanism comprises rapping assemblies mounted at the top and the bottom of the partition plate correspondingly and a polishing assembly mounted in the center of the top of the base; the positions of the upper thick pipe and the lower thick pipe are adjusted through the adjusting mechanism, an oxidation layer at the welding position is removed in cooperation with the interlayer welding auxiliary processing mechanism, meanwhile, reciprocating knocking is conducted on the welding position of the thick pipes, alternating stress generated by vibration can promote interlayer residual stress to be released, follow-up welding deformation is reduced, and welding quality is improved. By removing the oxide layer and releasing the residual stress in interlayer welding, the thick pipe splicing welding quality is effectively improved, and the thick pipe splicing welding efficiency is guaranteed while the thick pipe splicing welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to automated welding equipment for processing metal workpieces. Background Art

[0002] When welding thick pipes, in order to ensure the firmness of the weld, a groove is usually opened at the welding end of the thick pipe, and welding is performed layer by layer within the groove to weld the two thick pipes together.

[0003] Current welding equipment usually adopts a continuous welding method during the layer-by-layer welding process of thick pipes, which makes it difficult to automatically deal with the interlayer oxide layer and residual stress. If it relies on manual processing, the welding process will be interrupted for a long time. Only after the oxide layer and residual stress at the weld are processed can the welding of the next layer be continued, which seriously affects the efficiency of thick pipe splicing welding. Summary of the Invention

[0004] The purpose of the present invention is to provide an automated welding equipment for metal workpiece processing, so as to solve the problem that in the prior art, during the layer-by-layer welding process of thick pipes, a continuous welding method is usually adopted, which makes it difficult to automatically process the interlayer oxide layer and residual stress. If manual processing is relied upon, the welding process will be interrupted for a long time. Only after the oxide layer and residual stress at the weld are processed can the welding of the next layer be continued, which seriously affects the efficiency of thick pipe splicing welding.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an automated welding device for metal workpiece processing, comprising a base, two fixing seats mounted on the top of the base, and a welding machine disposed between the two fixing seats, and further comprising: The positioning mechanism includes a turntable rotatably connected to the inside of the two fixing seats, two positioning sleeves rotatably connected to the inside of the turntable, and a clamping assembly installed in the inside of the positioning sleeve; A pretreatment mechanism comprising a partition fixed between the two turntables and preheating components mounted on the top and bottom of the partition respectively; an adjusting mechanism, which is mounted on one of the fixed seats and is used to drive the turntable to rotate; The interlayer welding auxiliary processing mechanism comprises a rapping assembly respectively installed on the top and bottom of the partition and a grinding assembly installed at the top center of the base.

[0006] Furthermore, the clamping assembly includes electric push rods respectively mounted on the inner walls of both sides of the positioning sleeve and clamping blocks respectively mounted on the extended ends of the two electric push rods.

[0007] Furthermore, a driving mechanism is installed on the other fixing seat, and the driving mechanism includes a bidirectional gear ring rotatably connected to the outer wall of the fixing seat, a first gear fixedly sleeved on the outside of the two positioning sleeves, and a first motor installed on the top of the fixing seat; The two first gears are both located inside the bidirectional ring gear and are both meshed with the bidirectional ring gear; The output end of the first motor is fixedly connected to a second gear, and the second gear is located outside the bidirectional gear ring and meshes with the bidirectional gear ring.

[0008] Furthermore, the preheating assembly includes two movable blocks slidably connected to the outer wall of the partition and an electromagnetic induction heating coil installed inside the movable blocks, and the inner diameter of the electromagnetic induction heating coil is larger than the outer diameter of the thick tube.

[0009] Furthermore, the adjustment mechanism includes an outer gear ring fixedly sleeved on the outside of the turntable and a second motor installed on the top of the fixed base, the output end of the second motor is fixedly connected to a third gear, and the third gear is meshed with the outer gear ring.

[0010] Furthermore, the grinding assembly includes a drive shaft rotatably connected to the top of the base and a flexible brush wheel fixedly sleeved on the outside of the drive shaft. The flexible brush wheel is a soft steel wire brush used to clean the welding grooves of two thick pipes and to clean the oxide layer in the interlayer welding. One end of the drive shaft is connected to an output motor.

[0011] Furthermore, the rapping assembly includes an air hammer installed on the outer wall of the partition and a striking block installed at the extended end of the air hammer, and the air hammer is located between two movable blocks.

[0012] Furthermore, the interlayer welding auxiliary processing mechanism further includes two transmission shafts rotatably connected between the two turntables, a structural slot provided inside one of the turntables, and a third motor installed inside the structural slot; The two transmission shafts are respectively located above and below the partition plate. Two reciprocating thread grooves are provided on the outside of the transmission shafts. The two movable blocks are respectively threadedly connected to the two reciprocating thread grooves.

[0013] Furthermore, a fourth gear is fixedly connected to the output end of the third motor, a first one-way gear is installed on the outside of one of the transmission shafts, and a second one-way gear is installed on the outside of the other transmission shaft, and the fourth gear is respectively engaged with the first one-way gear and the second one-way gear.

[0014] Compared with the prior art, the present invention provides an automated welding equipment for metal workpiece processing, which has the following beneficial effects: 1. The position of the upper and lower sets of thick pipes is adjusted through the adjustment mechanism, and the oxide layer at the weld is removed in conjunction with the interlayer welding auxiliary processing mechanism. At the same time, the weld of the thick pipe is reciprocated and struck. The alternating stress generated by the vibration can promote the release of the residual stress between the layers and reduce the subsequent welding deformation. By removing the oxide layer and releasing the residual stress during the interlayer welding, the quality of the thick pipe splicing welding is effectively improved. While improving the quality of the thick pipe splicing welding, the efficiency of the thick pipe splicing welding is guaranteed. 2. During the thick pipe welding process, two electromagnetic induction heating coils are driven to move back and forth along the outside of the two thick pipes, so that the two thick pipes in the welding process are dynamically heated, stress concentration is reduced, and the shrinkage difference between the welding area and the far end of the thick pipe is reduced, thereby effectively reducing the deformation amplitude generated during the thick pipe welding process and reducing the temperature loss of the thick pipe during the interlayer processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the driving mechanism structure of the present invention; Figure 3 It is a schematic structural diagram of the clamping assembly of the present invention; Figure 4 It is a structural schematic diagram of the pre-processing mechanism and the interlayer welding auxiliary processing mechanism of the present invention; Figure 5 It is a partial structural diagram of the interlayer welding auxiliary processing mechanism of the present invention; Figure 6 It is a schematic structural diagram of the rapping assembly of the present invention.

[0017] Description of reference numerals: 1. Base; 2. Fixed seat; 3. Welding machine; 4. Turntable; 5. Positioning sleeve; 6. Partition; 7. Electric push rod; 8. Clamping block; 9. Bidirectional ring gear; 10. First gear; 11. First motor; 12. Second gear; 13. Movable block; 14. Electromagnetic induction heating coil; 15. Outer ring gear; 16. Second motor; 17. Third gear; 18. Drive shaft; 19. Flexible brush wheel; 20. Air hammer; 21. Striking block; 22. Transmission shaft; 23. Structural groove; 24. Third motor; 25. Reciprocating thread groove; 26. Fourth gear; 27. First one-way gear; 28. Second one-way gear. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: See Figures 1-6 , an automated welding device for metal workpiece processing, comprising a base 1, two fixing seats 2 mounted on top of the base 1, and a welding machine 3 disposed between the two fixing seats 2, wherein the welding machine 3 is a laser welding machine, and further comprising: The positioning mechanism includes a turntable 4 rotatably connected to the inside of the two fixed seats 2, two positioning sleeves 5 rotatably connected to the inside of the turntable 4, and a clamping assembly installed inside the positioning sleeve 5. The clamping assembly includes electric push rods 7 respectively installed on the inner walls of both sides of the positioning sleeve 5 and clamping blocks 8 respectively installed at the extended ends of the two electric push rods 7; The staff will insert the two thick tubes that need to be spliced ​​and welded together into the positioning sleeves 5 from the bottom of both sides, so that the two thick tubes are butted together, and the welding grooves of the two thick tubes are opposite to each other. The electric push rod 7 inside the positioning sleeve 5 is controlled to extend, and the thick tube is fixed inside the positioning sleeve 5 through the clamping block 8. After the two thick tubes are butted together, when one thick tube is driven to rotate, the other thick tube is also rotated by friction.

[0020] A driving mechanism is mounted on the other fixed base 2, which includes a bidirectional gear ring 9 rotatably connected to the outer wall of the fixed base 2, a first gear 10 fixedly sleeved on the outside of the two positioning sleeves 5, and a first motor 11 mounted on the top of the fixed base 2; the two first gears 10 are both located on the inner side of the bidirectional gear ring 9 and meshed with the bidirectional gear ring 9; the output end of the first motor 11 is fixedly connected to a second gear 12, which is located on the outer side of the bidirectional gear ring 9 and meshed with the bidirectional gear ring 9; During welding, the second gear 12 is driven to rotate by controlling the first motor 11, and the two-way gear ring 9 is driven to rotate by the meshing effect between the second gear 12 and the two-way gear ring 9. The two-way gear ring 9 is driven to rotate by the meshing effect between the two-way gear ring 9 and the two first gears 10, and the positioning sleeve 5 and the thick pipe inside it are driven to rotate, and the welding machine 3 is cooperated to weld the two thick pipes layer by layer along the circular trajectory.

[0021] The pretreatment mechanism includes a partition 6 fixed between the two turntables 4 and a preheating assembly mounted on the top and bottom of the partition 6, respectively. The preheating assembly includes two movable blocks 13 slidably connected to the outer wall of the partition 6 and an electromagnetic induction heating coil 14 mounted inside the movable blocks 13. The inner diameter of the electromagnetic induction heating coil 14 is larger than the outer diameter of the thick tube. The two thick tubes are inserted from the positioning sleeves 5 at the bottom of both sides and pass through the two electromagnetic induction heating coils 14. The opposite ends of the two thick tubes are respectively located on the inner sides of the two electromagnetic induction heating coils 14. The two electromagnetic induction heating coils 14 are used to preheat the welding areas of the two thick tubes.

[0022] An adjustment mechanism is mounted on one of the fixed bases 2 and is used to drive the turntable 4 to rotate. The adjustment mechanism includes an outer ring gear 15 fixedly sleeved on the outside of the turntable 4 and a second motor 16 mounted on the top of the fixed base 2. The output end of the second motor 16 is fixedly connected to a third gear 17, which meshes with the outer ring gear 15. After each layer of the two thick pipes is welded, the second motor 16 is controlled to drive the third gear 17 to rotate. Through the meshing effect between the third gear 17 and the outer ring gear 15, the turntable 4 is driven to rotate 180°, and the positions of the upper and lower groups of thick pipes are exchanged, so that the two thick pipes that have just been welded are rotated to the top of the grinding assembly, and the welding machine 3 welds the two thick pipes that have rotated to the bottom. In this cycle, the two groups of thick pipes are welded alternately layer by layer, so as to add the steps of rapping to remove stress and grinding to remove the oxide layer in the interlayer welding.

[0023] An interlayer welding auxiliary processing mechanism includes a rapping assembly respectively mounted on the top and bottom of the partition 6 and a grinding assembly mounted on the top center of the base 1. The grinding assembly includes a drive shaft 18 rotatably connected to the top of the base 1 and a flexible brush wheel 19 fixedly sleeved on the outside of the drive shaft 18. The flexible brush wheel 19 is a soft steel wire brush for cleaning the two thick pipe welding grooves and for cleaning the oxide layer in the interlayer welding. One end of the drive shaft 18 is connected to an output motor. The rapping assembly includes an air hammer 20 mounted on the outer wall of the partition 6 and a striking block 21 mounted on the extended end of the air hammer 20. The air hammer 20 is located between the two movable blocks 13. After each layer of welding of two thick pipes is completed, the two thick pipes are driven to rotate to the top of the flexible brush wheel 19 through the adjustment mechanism. The thick pipes are driven to rotate and the flexible brush wheel 19 is driven to rotate to grind the welding parts of the thick pipes to remove the oxide layer at the welding parts. At the same time, the air hammer 20 is controlled to drive the striking block 21 to move up and down to strike the welding parts of the thick pipes back and forth. The alternating stress generated by the vibration can promote the release of residual stress between layers and reduce subsequent welding deformation. By removing the oxide layer and releasing residual stress during interlayer welding, the quality of thick pipe splicing welding is effectively improved.

[0024] The interlayer welding auxiliary processing mechanism also includes two transmission shafts 22 rotatably connected between the two turntables 4, a structural groove 23 provided inside one of the turntables 4, and a third motor 24 installed inside the structural groove 23; the two transmission shafts 22 are respectively located above and below the partition 6, and two reciprocating thread grooves 25 are provided on the outside of the transmission shaft 22. The two movable blocks 13 are respectively threadedly connected to the two reciprocating thread grooves 25. The output end of the third motor 24 is fixedly connected to a fourth gear 26, a first one-way gear 27 is installed on the outside of one of the transmission shafts 22, and a second one-way gear 28 is installed on the outside of the other transmission shaft 22. The fourth gear 26 is meshed with the first one-way gear 27 and the second one-way gear 28, respectively. The two movable blocks 13 at the bottom of the partition 6 are always in a relatively close position, the purpose of which is to facilitate the electromagnetic induction heating coils 14 inside the two movable blocks 13 to preheat the thick pipe welding area. That is to say, the movable block 13 will only be driven to move when it is at the top of the partition 6; as shown in the attached figure Figure 5 As shown, during the welding process of the two thick pipes above the welding machine 3, when the third motor 24 is controlled to drive the fourth gear 26 to rotate forward, the fourth gear 26 is meshed with the first one-way gear 27 to drive the upper transmission shaft 22 to rotate. At this time, the second one-way gear 28 also rotates accordingly, but the lower transmission shaft 22 does not rotate accordingly. When the upper transmission shaft 22 rotates, the two reciprocating thread grooves 25 on its outer surface respectively drive the two movable blocks 13 to move back and forth along their respective reciprocating thread grooves 25, thereby driving the two electromagnetic induction heating coils 14 to move back and forth along the outer surfaces of the two thick pipes above, dynamically heating the two thick pipes during the welding process, reducing stress concentration, reducing the shrinkage difference between the welding area and the far end of the thick pipe, and thus effectively reducing the deformation amplitude generated during the thick pipe welding process. After the current layer welding is completed, the two movable blocks 13 are reset to a state close to each other, and then rotated to the bottom of the partition 6 by the adjustment mechanism; as shown in the attached figure Figure 5 As shown, if the transmission shaft 22 and the second one-way gear 28 currently at the bottom of the partition 6 rotate to their top, the fourth gear 26 is driven to reverse by controlling the third motor 24, and the fourth gear 26 is engaged with the second one-way gear 28 to drive the transmission shaft 22 connected to the second one-way gear 28 to rotate, that is, the transmission shaft 22 currently at the top of the partition 6 rotates. At this time, the first one-way gear 27 also rotates therewith, but the transmission shaft 22 connected thereto does not rotate therewith, that is, the transmission shaft 22 currently at the bottom of the partition 6 does not rotate therewith. When the transmission shaft 22 connected to the second one-way gear 28 rotates, it also drives the two electromagnetic induction heating coils 14 currently at the top of the partition 6 to move back and forth, and dynamically heats the thick pipe during the welding process.

[0025] Working principle: When in use, the staff will insert the two thick pipes that need to be spliced ​​and welded together from the positioning sleeves 5 at the bottom of both sides, and pass through the two electromagnetic induction heating coils 14. The opposite ends of the two thick pipes are respectively located on the inner sides of the two electromagnetic induction heating coils 14, so that the two thick pipes are butted together, and the welding grooves of the two thick pipes are opposite to each other. The electric push rod 7 inside the positioning sleeve 5 is controlled to extend, and the thick pipe is fixed inside the positioning sleeve 5 through the clamping block 8. The thick pipe inside the positioning sleeve 5 is driven to rotate, and the welding grooves of the two thick pipes are polished with the grinding assembly to remove oxides, oil stains and other impurities inside the grooves. Then, the welding areas of the two thick pipes are preheated by the two electromagnetic induction heating coils 14. After preheating is completed, the two thick pipes are rotated to the top of the partition 6 through the adjustment mechanism, and the two thick pipes are driven to rotate. The grooves of the two thick pipes are welded by the welding machine 3. During the welding process, the two electromagnetic induction heating coils 14 currently on the top of the partition 6 are driven to move back and forth left and right. Dynamic heating treatment is performed on the thick pipe during the welding process to reduce stress concentration and reduce the shrinkage difference between the welding area and the far end of the thick pipe, thereby effectively reducing the deformation amplitude generated during the thick pipe welding process. After welding one layer, the two thick pipes are driven to rotate to the bottom of the partition 6 by the adjustment mechanism, and the thick pipe is driven to rotate and the flexible brush wheel 19 is driven to rotate to grind the thick pipe welding point to remove the oxide layer at the welding point. At the same time, the air hammer 20 is controlled to drive the knocking block 21 to move up and down to knock the thick pipe welding point back and forth. The alternating stress generated by the vibration can promote the release of residual stress between layers and reduce subsequent welding deformation. By removing the oxide layer and releasing residual stress during interlayer welding, the quality of the thick pipe splicing welding is effectively improved. The two thick pipes are then driven to rotate to the top of the partition 6 by the adjustment mechanism. In this cycle, multi-layer welding treatment is performed on the two thick pipes, and the oxide layer is removed and residual stress is released during interlayer welding. While improving the quality of thick pipe splicing welding, the efficiency of thick pipe splicing welding is guaranteed.

[0026] It should be noted that the device structure and drawings of the present invention mainly describe the principles of the present invention. In terms of the technology of this design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principles of the above invention. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art. The above only describes certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present invention.

Claims

1. An automated welding device for metal workpiece processing, comprising a base (1), two fixing seats (2) mounted on top of the base (1), and a welding machine (3) arranged between the two fixing seats (2), characterized in that: Also includes: A positioning mechanism comprising a turntable (4) rotatably connected to the inside of two fixing seats (2), two positioning sleeves (5) rotatably connected to the inside of the turntable (4), and a clamping assembly installed inside the positioning sleeves (5); A pretreatment mechanism comprising a partition (6) fixedly connected between two turntables (4) and preheating components respectively mounted on the top and bottom of the partition (6); An adjusting mechanism, which is mounted on one of the fixed seats (2) and is used to drive the turntable (4) to rotate; An interlayer welding auxiliary processing mechanism comprises a rapping assembly respectively mounted on the top and bottom of a partition (6) and a grinding assembly mounted at the top center of a base (1).

2. The automated welding equipment for metal workpiece processing according to claim 1, characterized in that: The clamping assembly comprises electric push rods (7) respectively mounted on the inner walls of both sides of the positioning sleeve (5) and clamping blocks (8) respectively mounted on the extended ends of the two electric push rods (7).

3. The automated welding equipment for metal workpiece processing according to claim 2, characterized in that: A driving mechanism is mounted on the other fixed seat (2), the driving mechanism comprising a bidirectional gear ring (9) rotatably connected to the outer wall of the fixed seat (2), a first gear (10) fixedly sleeved on the outside of the two positioning sleeves (5), and a first motor (11) mounted on the top of the fixed seat (2); The two first gears (10) are both located inside the bidirectional ring gear (9) and are both meshed with the bidirectional ring gear (9); The output end of the first motor (11) is fixedly connected to a second gear (12), and the second gear (12) is located outside the bidirectional gear ring (9) and meshes with the bidirectional gear ring (9).

4. The automated welding equipment for metal workpiece processing according to claim 3, characterized in that: The preheating assembly comprises two movable blocks (13) slidably connected to the outer wall of the partition (6) and an electromagnetic induction heating coil (14) installed inside the movable blocks (13). The inner diameter of the electromagnetic induction heating coil (14) is larger than the outer diameter of the thick tube.

5. The automated welding equipment for metal workpiece processing according to claim 4, characterized in that: The adjustment mechanism comprises an outer gear ring (15) fixedly sleeved on the outside of the turntable (4) and a second motor (16) mounted on the top of the fixed seat (2); an output end of the second motor (16) is fixedly connected to a third gear (17), and the third gear (17) is meshed with the outer gear ring (15).

6. The automated welding equipment for metal workpiece processing according to claim 5, characterized in that: The grinding assembly comprises a driving shaft (18) rotatably connected to the top of the base (1) and a flexible brush wheel (19) fixedly sleeved on the outside of the driving shaft (18).

7. The automated welding equipment for metal workpiece processing according to claim 6, characterized in that: The rapping assembly comprises an air hammer (20) mounted on the outer wall of the partition (6) and a striking block (21) mounted on the extended end of the air hammer (20), wherein the air hammer (20) is located between two movable blocks (13).

8. The automated welding equipment for metal workpiece processing according to claim 7, characterized in that: The interlayer welding auxiliary processing mechanism also includes two transmission shafts (22) rotatably connected between the two turntables (4), a structural groove (23) provided inside one of the turntables (4), and a third motor (24) installed inside the structural groove (23); The two transmission shafts (22) are respectively located above and below the partition (6); two reciprocating thread grooves (25) are provided on the outside of the transmission shaft (22); and the two movable blocks (13) are respectively threadedly connected to the two reciprocating thread grooves (25).

9. The automated welding equipment for metal workpiece processing according to claim 8, characterized in that: The output end of the third motor (24) is fixedly connected to a fourth gear (26), a first one-way gear (27) is mounted on the outside of one of the transmission shafts (22), and a second one-way gear (28) is mounted on the outside of the other transmission shaft (22), and the fourth gear (26) is meshed with the first one-way gear (27) and the second one-way gear (28), respectively.

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