Plasma welding tool for automobile part production

Abstract

The invention relates to the technical field of plasma arc welding, and discloses a plasma welding tool for automobile part production, which comprises a rack, and a welding assembly is arranged at the top end of the rack. According to the plasma welding tool for automobile part production, by arranging the welding assembly, when a first hydraulic cylinder is started, a plasma welding head is made to be close to a weld joint on a circular workpiece body at the center of a circular ring plate, and an asynchronous motor, a driving gear, a fixing frame, the circular ring plate and a driven gear ring are matched to synchronously and stably rotate in multiple sets of limiting wheels; when the support is kept horizontal and is located outside the top end of the annular plate, a first asynchronous motor is started to enable a one-way threaded rod to rotate, and then the support is driven to rotate synchronously, and after the plasma welding head is started, the plasma welding head is matched with revolution of the plasma welding head to better weld a circular weld joint; and the movable column drives the plasma welding head to transversely move to weld a horizontal welding seam on the square workpiece body, so that the adaptability and the efficiency of the tool body can be improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plasma arc welding, in particular to a plasma welding tool for automobile part production. BACKGROUND

[0002] In the field of automobile part production, plasma welding technology has been widely used due to its unique advantages, such as energy concentration, fast welding speed, high welding quality, etc. Plasma arc welding is a method of welding by using the compressed arc between the tungsten electrode and the nozzle, with the protection of the plasma gas sprayed from the welding gun, and the supplementary protection of the auxiliary gas around it.

[0003] At present, there are various ways of plasma welding application in automobile part production. Some welding plants use a rotating table combined with an industrial welding robot for collaborative operation, and divide the processing area and the processed area on the rotating table. Some use manual welding, which is relatively low in cost. In addition, semi-automatic plasma arc welding equipment is also used, which realizes automatic welding by manually placing parts and pressing the switch.

[0004] However, the prior art has many shortcomings. The manual welding method is low in cost but too simple, and seriously depends on the technical level of the welder, resulting in low welding precision, poor consistency and low welding efficiency. Although the semi-automatic plasma arc welding equipment can realize a certain degree of automation, it still has limitations and cannot adapt well to the welding of circular or square workpieces. Therefore, the adaptability needs to be improved. In view of this, we propose a plasma welding tool for automobile part production. SUMMARY

[0005] The purpose of the present application is to provide a plasma welding tool for automobile part production to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A plasma welding tool for automobile part production, comprising a rack, a fixed frame fixedly installed on the top of the rack, a welding assembly provided at the top end of the rack, the welding assembly comprising:

[0008] An asynchronous motor is fixedly installed on the top of the rack, a driving gear is fixedly installed on the output shaft of the asynchronous motor, a circular plate is fixedly installed on the outer wall of the fixed frame, a limiting wheel is rotatably installed in the circular plate through a bearing, a plurality of limiting wheels are provided, and a driven gear ring is rotatably installed between the interiors of the plurality of limiting wheels, and the driving gear meshes with the driven gear ring.

[0009] Support, the driven gear ring is fixedly installed with a support away from the outer wall of one side of the circular plate, the outer wall of the support is fixedly installed with a first asynchronous motor, the output end of the first asynchronous motor is fixedly installed with a one-way threaded rod, the both ends of the one-way threaded rod are rotatably installed on the inner wall of the side wall of the support through bearings;

[0010] Moving column, the one-way threaded rod is threadedly connected with a moving column, one end of the moving column is slidably installed in the inner wall of the support, the other end of the moving column is fixedly installed with an L-shaped plate, the inner wall of the L-shaped plate is fixedly connected with the outer wall of a first hydraulic cylinder, the piston end of the first hydraulic cylinder is fixedly installed with a plasma welding head, the output end of the plasma welding head is directed to the horizontal axis of the center of the circular plate.

[0011] In a further scheme, the fixed frame is provided with two, and the two fixed frames are symmetrically arranged at the two ends of the circular plate, so that the circular plate is more stable.

[0012] In a further scheme, the centers of the circular sections of the circular plate and the driven gear ring are coaxial.

[0013] In a further scheme, the motion trajectories of the support, the first asynchronous motor, the L-shaped plate, the first hydraulic cylinder and the plasma welding head do not intersect with the limiting wheels, preventing motion interference.

[0014] In a further scheme, the circular plate is provided with a positioning assembly, the positioning assembly comprises a multi-head support, the top end of the circular plate is fixedly connected with the bottom end of the multi-head support away from one side of the driven gear ring, the top end of the multi-head support is fixedly installed with a second hydraulic cylinder on one side, the piston end of the second hydraulic cylinder is fixedly installed with a V-shaped block at the bottom, and a V-shaped groove is formed in the V-shaped block.

[0015] In a further scheme, the top end of the multi-head support is fixedly installed with a transverse hydraulic cylinder on the other side, the piston end of the transverse hydraulic cylinder is fixedly installed with a vertical hydraulic cylinder on the outside, a transverse groove is formed in the multi-head support, the piston end of the vertical hydraulic cylinder penetrates through the transverse groove, and a rectangular plate is fixedly installed at the bottom of the piston end of the vertical hydraulic cylinder, and a rectangular groove is formed in the rectangular plate.

[0016] In a further scheme, the outer wall of the support is fixedly installed with one end of a spring rod, the other end of the spring rod is fixedly installed with a wheel frame, and a roller is rotatably installed in the wheel frame, the spring rod, the wheel frame and the roller are provided with two groups, the two groups of spring rods, wheel frames and rollers are mirror-symmetrically arranged at the two ends of the support, the two groups of rollers are respectively rolled and fitted in the V-shaped groove and the rectangular groove, so as to better limit the rollers, and the L-shaped plate and the first hydraulic cylinder do not intersect with the multi-head support, the V-shaped block and the rectangular plate, preventing motion interference.

[0017] In a further scheme, the top end of the rack is provided with a fixing assembly, the fixing assembly comprises an electric sliding rail, the electric sliding rail is fixedly installed inside the top end of the rack, a sliding piece on the electric sliding rail is fixedly installed with a third hydraulic cylinder, the third hydraulic cylinder is fixedly installed with a horizontal moving mechanism at the top of the piston end, a sliding piece on the horizontal moving mechanism is fixedly installed with a sliding block at one end, the other end of the sliding block is fixedly installed with a second asynchronous motor, the output end of the second asynchronous motor is fixedly installed with a double-way threaded rod, the double-way threaded rod is threadedly matched with a clamping block, a limiting column is fixedly installed on the inner wall of the sliding block, the clamping block is slidably installed on the outside of the limiting column through a bearing piece, the electric sliding rail, the third hydraulic cylinder, the horizontal moving mechanism, the sliding block, the second asynchronous motor, the double-way threaded rod, the clamping block and the limiting column are provided with two groups, and the number of the electric sliding rail, the third hydraulic cylinder and the clamping block in a single group is two respectively, and the two clamping blocks clamp a workpiece body to be welded, so that the adaptability is improved.

[0018] In a further scheme, the horizontal moving mechanism comprises a mounting frame, a motor, a screw rod, a limiting sliding rail and a sliding piece.

[0019] In a further scheme, the outer side of the circular ring plate is provided with an auxiliary assembly, the auxiliary assembly comprises an infrared sensor receiving end, the infrared sensor receiving end is adhered to the outer center of the end of the workpiece body to be welded away from the sliding block, an auxiliary hydraulic cylinder is fixedly installed at the end of the multi-head frame away from the circular ring plate, an infrared sensor emitting end is fixedly installed at the bottom of the piston end of the auxiliary hydraulic cylinder, when the infrared sensor emitting end moves to the lowest position, it is on the horizontal axis of the center of the circular ring plate, and the efficiency is improved.

[0020] Compared with the prior art, the application provides a plasma welding tool for automobile accessory production, which has the following advantages:

[0021] 1. The plasma welding tool for automobile accessory production, in order to improve the adaptability and efficiency of the tool body, by setting the welding assembly, when the first hydraulic cylinder on the L-shaped plate is started, the plasma welding head is close to the weld on the circular workpiece body at the center of the circular ring plate, when the asynchronous motor on the rack is started, the driving gear rotates, cooperates with the fixed frame and the circular ring plate, and makes the driven gear ring rotate synchronously and stably inside the multiple limiting wheels, so as to drive the support to rotate synchronously, and then after the plasma welding head is started, it can better weld the circular weld by cooperating with its own revolution, and when the support is kept horizontal and at the top of the outer side of the circular ring plate, the first asynchronous motor is started, the unidirectional threaded rod is rotated, the moving column drives the plasma welding head to move horizontally to weld the horizontal weld on the square workpiece body, thereby improving the adaptability and efficiency of the tool body.

[0022] 2. The plasma welding tooling for automobile parts production is designed to be more stable when the welding assembly welds square workpieces. By setting a positioning assembly, when the second hydraulic cylinder on the multi-head frame is started, the V-shaped block moves downward, thereby blocking the bracket that rotates there, so that a group of wheel frames drive the rollers to roll inside the V-shaped groove on the V-shaped block, and at the same time a group of spring rods are compressed and deformed. When the bracket remains horizontal, the vertical hydraulic cylinder is started to move the rectangular plate downward, and the horizontal hydraulic cylinder is started to move the vertical hydraulic cylinder horizontally in conjunction with the horizontal groove, so that the rectangular groove is close to another group of wheel frames and rollers, causing another group of spring rods to be compressed and deformed, thereby making the bracket more stable, and thus making the welding assembly more stable when welding square workpieces.

[0023] 3. In order to improve welding efficiency and adaptability, the plasma welding tooling for automobile parts production is provided with a fixed component, the electric slide is started to move the third hydraulic cylinder, the third hydraulic cylinder is started to move the transverse mechanism up and down, and the transverse mechanism is started to move the slider laterally, so that the second asynchronous motor can move in three axes, the second asynchronous motor is started to rotate the bidirectional threaded rod, and the limit column is used to enable the two sets of clamps to move toward each other, so that the square or round workpiece body can be better fixed and moved, and the two bodies to be welded can be brought close to each other, so that the weld between them can be better welded by the welding component, thereby improving the degree of automation, improving welding efficiency, and improving adaptability.

[0024] 4. In order to further improve the welding efficiency, the plasma welding tooling for automobile parts production is equipped with auxiliary components. Before the fixed component is operated, the auxiliary hydraulic cylinder is first started to make the two infrared sensor transmitting ends on the horizontal axis of the center of the circular plate. Then the fixed component is operated to align the infrared sensor receiving end with the infrared sensor transmitting end, and a signal is generated and sent to the controller, so that the workpiece to be welded can also be on the horizontal axis of the center of the circular plate, so as to achieve precise positioning, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0028] Figure 4 This is a schematic diagram of a partial structure of the present invention from a first perspective;

[0029] Figure 5 A schematic diagram of a partial structure of the present invention from a second viewing angle;

[0030] Figure 6 This is a schematic diagram of a partial structure of the present invention from a third perspective;

[0031] Figure 7 This is a schematic diagram of a cross section of the auxiliary hydraulic cylinder of the present invention from a first perspective;

[0032] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of the middle B area;

[0033] Figure 9 This is a schematic diagram of a cross section of the auxiliary hydraulic cylinder of the present invention from a second viewing angle;

[0034] Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure of the middle C area;

[0035] Figure 11 This is a schematic diagram of the auxiliary hydraulic cylinder cross section from a third perspective of the present invention;

[0036] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure of the D area in the middle.

[0037] In the figure: 1, frame; 2, fixed frame; 3, welding assembly; 31, asynchronous motor; 32, driving gear; 33, circular plate; 34, limiting wheel; 35, driven gear ring; 36, bracket; 37, first asynchronous motor; 38, one-way threaded rod; 39, moving column; 310, L-shaped plate; 311, first hydraulic cylinder; 312, plasma welding head; 4, positioning assembly; 41, multi-head frame; 42, second hydraulic cylinder; 43, V-shaped block; 44, V-shaped groove; 45, horizontal hydraulic Pressure cylinder; 46. Vertical hydraulic cylinder; 47. Horizontal groove; 48. Rectangular plate; 49. Rectangular groove; 410. Spring rod; 411. Wheel frame; 412. Roller; 5. Fixed component; 51. Electric slide rail; 52. Third hydraulic cylinder; 53. Transverse movement mechanism; 54. Slider; 55. Second asynchronous motor; 56. Bidirectional threaded rod; 57. Clamp; 58. Limit column; 6. Auxiliary component; 61. Infrared sensor receiving end; 62. Auxiliary hydraulic cylinder; 63. Infrared sensor transmitting end. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the present application, the term "upper" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is mainly used for better description of the present application and its embodiments, and is not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Also, the term "upper" may also be used in some cases to indicate a certain attachment relationship or connection relationship. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0040] Please refer to Figures 1-12 The present application provides a technical solution:

[0041] The automobile parts production plasma welding tool comprises a rack 1, and a fixed frame 2 is fixedly installed on the top of the rack 1.

[0042] In an embodiment of the present application, the top end of the rack 1 is provided with a welding assembly 3, the welding assembly 3 comprises an asynchronous motor 31, the asynchronous motor 31 is fixedly installed on the top of the rack 1, a driving gear 32 is fixedly installed outside the output shaft of the asynchronous motor 31, a circular ring plate 33 is fixedly installed on the outer wall of the fixed frame 2, in addition, the fixed frame 2 is provided with two, the two fixed frames 2 are symmetrically arranged at both ends of the circular ring plate 33, so that the circular ring plate 33 is more stable, the limit wheel 34 is rotatably installed in the circular ring plate 33 through a bearing piece, the limit wheel 34 is provided with six groups, and the six groups of limit wheels 34 are rotatably installed inside each other, the driving gear 32 engages with the driven gear ring 35, in addition, the circular cross sections of the circular ring plate 33 and the driven gear ring 35 are coaxial, the support 36 is fixedly installed on the outer wall of the side away from the circular ring plate 33 of the driven gear ring 35, the first asynchronous motor 37 is fixedly installed on the outer wall of the support 36, the one-way threaded rod 38 is fixedly installed at the output end of the first asynchronous motor 37, the two ends of the one-way threaded rod 38 are rotatably installed in the inner wall of the side wall of the support 36 through a bearing piece, the moving column 39 is threadedly connected with the one-way threaded rod 38, one end of the moving column 39 is slidably installed in the inner wall of the support 36, the other end of the moving column 39 is fixedly installed with an L-shaped plate 310, the first hydraulic cylinder 311 is fixedly connected with the inner wall of the L-shaped plate 310, in addition, the movement trajectories of the support 36, the first asynchronous motor 37, the L-shaped plate 310, the first hydraulic cylinder 311 and the plasma welding head 312 are all not intersected with the limit wheel 34, so as to prevent movement interference, the plasma welding head 312 is fixedly installed on the outer wall of the piston end of the first hydraulic cylinder 311, and the output end of the plasma welding head 312 points to the horizontal axis where the center of the circular ring plate 33 is located.

[0043] When the first hydraulic cylinder 311 on the L-shaped plate 310 is started, the piston end will bring the plasma welding head 312 to the welding seam on the circular workpiece body at the center of the circular ring plate 33, and move close until the appropriate welding distance is reached. Then, the asynchronous motor 31 on the rack 1 is started, and the output shaft of the asynchronous motor 31 will drive the driving gear 32 to start rotating. Since the driving gear 32 is engaged with the driven gear ring 35, the driven gear ring 35 will rotate synchronously under the limiting and guiding action of the multiple sets of limiting wheels 34, and the support 36 fixed to the outer wall of the driven gear ring 35 away from the circular ring plate 33 will rotate synchronously with the driven gear ring 35. At this time, the plasma welding head 312 is started, which will cooperate with the revolution of the support 36 to perform continuous and uniform welding on the circular weld seam on the circular workpiece body. When a square workpiece body needs to be welded, first rotate the support 36 to be horizontal and outside the top end of the circular ring plate 33, then start the first asynchronous motor 37, and the output end of the first asynchronous motor 37 will drive the unidirectional threaded rod 38 to rotate. Since the moving column 39 is threadedly connected with the unidirectional threaded rod 38 and is slidably installed at one end inside the support 36, the rotation of the unidirectional threaded rod 38 will be converted into the horizontal movement of the moving column 39, thereby enabling the plasma welding head 312 to move horizontally. Starting the first hydraulic cylinder 311 makes the plasma welding head 312 move downward to the corresponding position of the horizontal weld seam of the square workpiece body, and finally the plasma welding head 312 welds the horizontal weld seam on the square workpiece body. Through such operation mode, the adaptability and work efficiency of the tool body to different shapes of workpieces are greatly improved.

[0044] In an embodiment of the present application, the circular ring plate 33 is provided with a positioning assembly 4, which comprises a multi-head frame 41, the top end of the circular ring plate 33 is fixedly connected with the bottom end of the multi-head frame 41 away from the driven gear ring 35, the top end of the multi-head frame 41 is fixedly installed with a second hydraulic cylinder 42 on one side, the bottom of the piston end of the second hydraulic cylinder 42 is fixedly installed with a V-shaped block 43, the V-shaped block 43 is provided with a V-shaped groove 44, in addition, the top end of the multi-head frame 41 is fixedly installed with a transverse hydraulic cylinder 45 on the other side, the piston end of the transverse hydraulic cylinder 45 is fixedly installed with a vertical hydraulic cylinder 46 outside, the multi-head frame 41 is provided with a transverse groove 47, the piston end of the vertical hydraulic cylinder 46 penetrates through the transverse groove 47, the bottom of the piston end of the vertical hydraulic cylinder 46 is fixedly installed with a rectangular plate 48, the rectangular plate 48 is provided with a rectangular groove 49, in addition, the outer wall of the support 36 is fixedly installed with one end of a spring rod 410, the other end of the spring rod 410 is fixedly installed with a wheel frame 411, the wheel frame 411 is rotatably installed with a roller 412 inside, the spring rod 410, the wheel frame 411 and the roller 412 are provided with two groups, the two groups of spring rods 410, wheel frames 411 and rollers 412 are mirror image arranged at both ends of the support 36, the two groups of rollers 412 are respectively rolled and fitted inside the V-shaped groove 44 and the rectangular groove 49, so that the rollers 412 are better limited, the L-shaped plate 310 and the first hydraulic cylinder 311 do not intersect with the multi-head frame 41, the V-shaped block 43 and the rectangular plate 48, so as to prevent movement interference.

[0045] When the welding assembly 3 needs to weld a square workpiece, the support 36 is rotated to the corresponding position during use, the second hydraulic cylinder 42 on the multi-head frame 41 is started first, the piston end of the second hydraulic cylinder 42 pushes the V-shaped block 43 to move downward until the V-shaped block 43 can effectively block the support 36 rotated to this position, under the action of the continuous rotation of the support 36, a group of wheel frames 411 drives the rollers 412 to roll inside the V-shaped groove 44 on the V-shaped block 43, at the same time, the spring rod 410 connected with the wheel frame 411 of this group is compressed and deformed, so that the support 36 gradually stabilizes and maintains a horizontal state, after the support 36 maintains the horizontal state, the vertical hydraulic cylinder 46 is started, the piston end of the vertical hydraulic cylinder 46 drives the rectangular plate 48 to move downward, after the bottom of the rectangular plate 48 is flush with the bottom of the V-shaped block 43, the transverse hydraulic cylinder 45 is started, the transverse hydraulic cylinder 45 pushes the vertical hydraulic cylinder 46 to move transversely along the transverse groove 47, so that the rectangular groove 49 on the rectangular plate 48 gradually approaches the wheel frame 411 and the roller 412 at the other end of the support 36, the roller 412 at this end enters the rectangular groove 49, at the same time, the corresponding spring rod 410 also compresses and deforms, through the limiting of the two groups of rollers 412 by the V-shaped groove 44 and the rectangular groove 49, the support 36 is fixed more stably, so as to ensure that the welding assembly 3 can stably work when welding the square workpiece and ensure the welding quality, the above-mentioned electric elements can be sequentially reversed to reset.

[0046] In an embodiment of the present application, the top end of the rack 1 is provided with a fixing assembly 5, which comprises an electric sliding rail 51, the electric sliding rail 51 is fixedly installed inside the top end of the rack 1, a sliding part on the electric sliding rail 51 is fixedly installed with a third hydraulic cylinder 52, the top end of the piston of the third hydraulic cylinder 52 is fixedly installed with a transverse moving mechanism 53, in addition, the transverse moving mechanism 53 comprises a mounting frame, a motor, a lead screw, a limiting sliding rail and a sliding part, the mounting frame is fixedly installed on the top end of the piston of the two third hydraulic cylinders 52, the motor is fixedly installed on the outer wall of the mounting frame, the output end of the motor (asynchronous) is fixedly connected with the lead screw, the two ends of the lead screw are rotatably installed in the mounting frame through bearing members, the sliding part is threadedly connected with the lead screw, one end of the sliding part is fixedly connected with the sliding block of the limiting sliding rail, the outer wall of the sliding part on the transverse moving mechanism 53 is fixedly installed with one end of a sliding block 54, the other end of the sliding block 54 is fixedly installed with a second asynchronous motor 55, the output end of the second asynchronous motor 55 is fixedly installed with a bidirectional screw rod 56, the bidirectional screw rod 56 is threadedly connected with a clamping block 57, a limiting column 58 is fixedly installed on the inner wall of the sliding block 54, one end of the clamping block 57 is slidably installed on the outside of the limiting column 58 through a bearing member, the electric sliding rail 51, the third hydraulic cylinder 52, the transverse moving mechanism 53, the sliding block 54, the second asynchronous motor 55, the bidirectional screw rod 56, the clamping block 57 and the limiting column 58 are provided with two groups, and the number of a single group of the electric sliding rail 51, the third hydraulic cylinder 52 and the clamping block 57 is two respectively, and two clamping blocks 57 clamp the workpiece bodies to be welded, thereby improving the adaptability.

[0047] When the present embodiment is in use, according to the position and specification of the workpiece bodies to be welded, the second asynchronous motor 55 is started, the output end of the second asynchronous motor 55 drives the bidirectional screw rod 56 to rotate, because the two clamping blocks 57 are threadedly connected with the two ends of the bidirectional screw rod 56 respectively, and one end of the clamping block 57 is slidably installed on the outside of the limiting column 58, the rotation of the bidirectional screw rod 56 drives the two clamping blocks 57 to move towards each other under the guidance of the limiting column 58, thereby fixing the square or circular workpiece bodies, before welding, the two workpiece bodies to be welded can be brought close to each other, so that the connecting part between them forms a weld, which is convenient for the welding assembly 3 to perform welding work, when the electric sliding rail 51 is started, the sliding part on the electric sliding rail 51 drives the third hydraulic cylinder 52 to move transversely, the third hydraulic cylinder 52 is adjusted to a suitable transverse position, then the third hydraulic cylinder 52 is started, the piston end drives the transverse moving mechanism 53 to move up and down, so as to adjust the height of the transverse moving mechanism 53, then the transverse moving mechanism 53 is started, the motor in the transverse moving mechanism 53 drives the lead screw to rotate, so that the sliding part threadedly connected with the lead screw moves transversely along the limiting sliding rail, thereby driving the sliding block 54 to move transversely, through a series of actions, the second asynchronous motor 55 moves in three axes in three-dimensional space, so as to drive the workpiece bodies to move to the corresponding position, which effectively improves the automation degree of the tooling, improves the welding efficiency and the adaptability to different workpieces.

[0048] In one embodiment of the present application, the outer side of the circular ring plate 33 is provided with an auxiliary assembly 6, which includes an infrared sensor receiving end 61, and the outer side of the center of the end of the workpiece body away from the sliding block 54 is adhered with the infrared sensor receiving end 61, the end of the multi-head frame 41 away from the circular ring plate 33 is fixedly installed with an auxiliary hydraulic cylinder 62, and the bottom of the piston end of the auxiliary hydraulic cylinder 62 is fixedly installed with an infrared sensor emitting end 63. When the infrared sensor emitting end 63 moves to the lowest position, it is on the horizontal axis of the center of the circular ring plate 33, thereby improving the efficiency.

[0049] When the present embodiment is used, before the fixing assembly 5 starts to fix the workpiece body, the auxiliary hydraulic cylinder 62 on the multi-head frame 41 is started first, the piston end of the auxiliary hydraulic cylinder 62 drives the infrared sensor emitting end 63 to move downward until the two infrared sensor emitting ends 63 are on the horizontal axis of the center of the circular ring plate 33 and remain stable, and then the fixing assembly 5 is operated. In the process of moving the workpiece body to be welded, the infrared sensor receiving end 61 adhered to the workpiece body will gradually approach and finally align with the infrared sensor emitting end 63. When the two are aligned, a corresponding signal will be generated and sent to the controller of the tool, realizing the accurate positioning of the workpiece body to be welded and providing a basis for the accurate welding of the subsequent welding assembly 3, further improving the welding efficiency and welding precision. The infrared sensor receiving end 61 adhered to the two workpiece bodies is removed before the two workpiece bodies are close.

[0050] It is worth noting that the plasma welding head 312 includes a power supply system (providing direct current or pulse current to ensure stable combustion of the electric arc, usually using a direct current power supply with a steep drop characteristic), a plasma welding torch, a tungsten electrode (usually cerium tungsten or thorium tungsten, used to generate an electric arc), a nozzle (a copper component surrounding the tungsten electrode, with a small jet hole, compressing the electric arc and guiding the protective gas), a protective gas device (providing two kinds of gas, one is plasma gas (such as argon, argon-hydrogen mixed gas), used to form a plasma arc; the other is a protective gas (such as argon), to prevent the molten pool from being oxidized by air), a control system (adjusting current, gas flow, welding speed and other parameters to realize automatic or semi-automatic welding), since the structure and working principle of the plasma welding head 312 are prior art and existing equipment, they will not be described here. Further, a dust suction device is fixedly installed outside the L-shaped plate 310 for sucking and removing debris and impurities (which are prior art and existing equipment, so they will not be described here, and are not shown in the figure).

[0051] Wherein, the electrical components in the present application are all electrically connected with the PLC controller and 220V mains, and the PLC controller is a conventional known device capable of controlling the asynchronous motor 31, the first asynchronous motor 37, the first hydraulic cylinder 311, the plasma welding head 312, the second hydraulic cylinder 42, the horizontal hydraulic cylinder 45, the vertical hydraulic cylinder 46, the electric sliding rail 51, the third hydraulic cylinder 52, the horizontal moving mechanism 53, the second asynchronous motor 55, the infrared sensor receiving end 61, the auxiliary hydraulic cylinder 62 and the infrared sensor transmitting end 63, the standard parts used in the present application can be purchased from the market, the specific connection mode of each part is connected by using the conventional means such as rivets and welding in the prior art, and the standard parts all adopt the conventional type in the prior art, the matching structure of the hydraulic drive structure appearing in the present application, such as the hydraulic tank and the hydraulic pump, is the existing device, and the asynchronous motor 31, the first asynchronous motor 37, the first hydraulic cylinder 311, the second hydraulic cylinder 42, the horizontal hydraulic cylinder 45, the vertical hydraulic cylinder 46, the electric sliding rail 51, the third hydraulic cylinder 52, the horizontal moving mechanism 53, the second asynchronous motor 55 and the auxiliary hydraulic cylinder 62 are all self-locking stepping electric devices, which will not be described in detail here.

[0052] The above has made a detailed description of the present application generally, but some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the present application are within the protection scope of the present application.

Claims

1. A plasma welding tool for automobile parts production, comprising a frame (1), a fixing frame (2) fixedly mounted on the top of the frame (1), characterized in that: A welding assembly (3) is provided at the top of the frame (1), and the welding assembly (3) comprises: An asynchronous motor (31) is fixedly mounted on the top of the frame (1), a driving gear (32) is fixedly mounted on the outside of the output shaft of the asynchronous motor (31), a circular plate (33) is fixedly mounted on the outer wall of the fixed frame (2), a limiting wheel (34) is rotatably mounted inside the circular plate (33) via a bearing, multiple groups of the limiting wheels (34) are provided, and a driven gear ring (35) is rotatably mounted between the multiple groups of the limiting wheels (34), and the driving gear (32) meshes with the driven gear ring (35); A bracket (36) is fixedly mounted on the outer wall of the driven gear ring (35) away from the annular plate (33); a first asynchronous motor (37) is fixedly mounted on the outer wall of the bracket (36); a one-way threaded rod (38) is fixedly mounted on the output end of the first asynchronous motor (37); and both ends of the one-way threaded rod (38) are rotatably mounted on the inner side wall of the bracket (36) through bearings; A movable column (39) is threadedly engaged with the movable column (39) on the one-way threaded rod (38), one end of the movable column (39) is slidably mounted inside the bracket (36), and the other end of the movable column (39) is fixedly mounted with an L-shaped plate (310), the interior of the L-shaped plate (310) is fixedly connected to the outer wall of the first hydraulic cylinder (311), and a plasma welding head (312) is fixedly mounted on the outer wall of the piston end of the first hydraulic cylinder (311), and the output end of the plasma welding head (312) points to the horizontal axis where the center of the circular ring plate (33) is located.

2. The plasma welding tool for automobile parts production according to claim 1, characterized in that: Two fixing frames (2) are provided, and the two fixing frames (2) are symmetrically arranged at both ends of the circular ring plate (33).

3. The plasma welding tool for automobile parts production according to claim 1, characterized in that: The circular cross-section centers of the annular plate (33) and the driven gear ring (35) are coaxial.

4. The plasma welding tool for automobile parts production according to claim 1, characterized in that: The motion trajectories of the bracket (36), the first asynchronous motor (37), the L-shaped plate (310), the first hydraulic cylinder (311), and the plasma welding head (312) do not intersect with the limiting wheel (34).

5. The plasma welding tool for automobile parts production according to claim 1, characterized in that: A positioning assembly (4) is provided on the annular plate (33), and the positioning assembly (4) includes a multi-head frame (41). The top of the annular plate (33) is fixedly connected to the bottom of the multi-head frame (41) on a side away from the driven gear ring (35). A second hydraulic cylinder (42) is fixedly installed on one side of the top of the multi-head frame (41). A V-shaped block (43) is fixedly installed on the bottom of the piston end of the second hydraulic cylinder (42), and a V-shaped groove (44) is provided on the V-shaped block (43).

6. The plasma welding tool for automobile parts production according to claim 5, characterized in that: A horizontal hydraulic cylinder (45) is fixedly installed on the other side of the top of the multi-head frame (41), and a vertical hydraulic cylinder (46) is fixedly installed on the outside of the piston end of the horizontal hydraulic cylinder (45). A transverse groove (47) is provided on the multi-head frame (41), and the piston end of the vertical hydraulic cylinder (46) passes through the transverse groove (47). A rectangular plate (48) is fixedly installed on the bottom of the piston end of the vertical hydraulic cylinder (46), and a rectangular groove (49) is provided on the rectangular plate (48).

7. The plasma welding tool for automobile parts production according to claim 6, characterized in that: One end of a spring rod (410) is fixedly mounted on the outer wall of the bracket (36), and a wheel frame (411) is fixedly mounted on the other end of the spring rod (410). A roller (412) is rotatably mounted inside the wheel frame (411). Two groups of the spring rod (410), the wheel frame (411) and the roller (412) are provided. The two groups of the spring rod (410), the wheel frame (411) and the roller (412) are mirror-imaged and arranged at both ends of the bracket (36). The two groups of the rollers (412) are respectively rolled and fitted inside the V-shaped groove (44) and the rectangular groove (49). The L-shaped plate (310) and the first hydraulic cylinder (311) do not intersect with the multi-head frame (41), the V-shaped block (43) and the rectangular plate (48).

8. The plasma welding tool for automobile parts production according to claim 5, characterized in that: The top of the frame (1) is provided with a fixed assembly (5), the fixed assembly (5) includes an electric slide rail (51), the electric slide rail (51) is fixedly installed inside the top of the frame (1), the top of the sliding member on the electric slide rail (51) is fixedly installed with a third hydraulic cylinder (52), the top of the piston end of the third hydraulic cylinder (52) is fixedly installed with a transverse mechanism (53), the outer wall of the sliding member on the transverse mechanism (53) is fixedly installed with one end of a slider (54), the other end of the slider (54) is fixedly installed with a second asynchronous motor (55), the output end of the second asynchronous motor (55) is fixedly installed with a bidirectional threaded rod (56), the bidirectional A clamping block (57) is threadedly engaged on the threaded rod (56), a limiting column (58) is fixedly installed on the inner wall of the slider (54), and one end of the clamping block (57) is slidably installed on the outside of the limiting column (58) through a bearing member. The electric slide rail (51), the third hydraulic cylinder (52), the transverse movement mechanism (53), the slider (54), the second asynchronous motor (55), the bidirectional threaded rod (56), the clamping block (57) and the limiting column (58) are provided in two groups, and the number of each of the electric slide rail (51), the third hydraulic cylinder (52) and the clamping block (57) is respectively provided in two, and the workpiece body to be welded is clamped between the two clamping blocks (57).

9. The plasma welding tool for automobile parts production according to claim 8, characterized in that: The transverse movement mechanism (53) comprises a mounting frame, a motor, a screw rod, a limiting slide rail and a sliding member.

10. The plasma welding tool for automobile parts production according to claim 8, characterized in that: An auxiliary component (6) is provided on the outside of the circular plate (33), and the auxiliary component (6) includes an infrared sensor receiving end (61). The infrared sensor receiving end (61) is adhered to the center of the outside of the end of the workpiece to be welded away from the slider (54). An auxiliary hydraulic cylinder (62) is fixedly installed on the end of the multi-head frame (41) away from the circular plate (33). An infrared sensor emitting end (63) is fixedly installed on the bottom of the piston end of the auxiliary hydraulic cylinder (62). When the infrared sensor emitting end (63) moves to the bottom, it is located on the horizontal axis of the center of the circular plate (33).

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