Plasma arc welder

Abstract

The application relates to the technical field of plasma arc welding, in particular to a plasma arc welding machine which comprises a machine table, an arrangement structure is arranged on the inner side of the machine table, a positioning structure is arranged on the top side of the arrangement structure, a lifting structure is arranged on the bottom side of the arrangement structure, a welding structure is arranged in the middle of the machine table, an adjusting structure is arranged on the inner side of the welding structure, and a bearing structure is arranged on the arrangement structure. The two parts to be welded can be synchronously rotated through the arrangement structure, good welding effect is obtained, the workpiece with a cylindrical structure can be stably and accurately fixed through the positioning structure, the height can be adjusted according to the specifications of the welding workpiece through the lifting structure, the welding work of the cylindrical workpiece can be quickly completed through the welding structure, the welding angle of the plasma welding gun can be adjusted through the adjusting structure, and the tubular or other special-shaped workpiece can be provided with good fixing effect through the bearing structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma arc welding, in particular to a plasma arc welding machine. BACKGROUND

[0002] Plasma arc welding refers to a fusion welding method using a high-energy density beam of plasma arc as a welding heat source. Plasma arc welding has the characteristics of energy concentration, high productivity, fast welding speed, small stress deformation, stable electric arc and suitability for welding thin plates and boxes.

[0003] In actual production and life, the workpieces to be welded have different structural characteristics. When welding the end of a cylindrical workpiece, the welding path is a circular structure, so the workpiece or welding gun must be rotated during the welding process. In this process, the welding path is prone to deviation, which can lead to a decrease in welding strength. Moreover, when the welding surface is a non-planar surface, the existing welding equipment cannot guarantee that the workpiece is welded in a vertical state on a micro-arc surface or other non-planar structure. In addition, when the workpiece to be welded is a cylindrical structure such as a pipe, it is difficult to ensure the stability of the workpiece during the welding process. SUMMARY

[0004] To solve the problems in the prior art, the present application provides a plasma arc welding machine.

[0005] The technical scheme adopted by the present application to solve the technical problems is: a plasma arc welding machine, comprising a machine table, an installation structure is arranged on the inner side of the machine table, a positioning structure is arranged on the top side of the installation structure, a lifting structure is arranged on the bottom side of the installation structure, a welding structure is arranged in the middle of the machine table, an adjusting structure is arranged on the inner side of the welding structure, and a bearing structure is arranged on the installation structure.

[0006] Specifically, the installation structure comprises a bearing plate, the bearing plate is rotatably connected to the machine table, a drive sleeve is slidably connected to the bottom side of the bearing plate, a positioning ring is arranged on the top side of the bearing plate, the positioning ring is rotatably connected to the top side of the machine table, the positioning ring and the drive sleeve are coaxially arranged and have equal diameters, the positioning structure comprises clamping rods, a plurality of clamping rods are threadedly connected to the side surface of the positioning ring, and the included angles between adjacent clamping rods are equal.

[0007] Specific, the side of the machine is rotatably connected with a drive shaft, the top end of the drive shaft is fixedly connected with a first pulley, the side of the positioning ring is provided with a first tooth groove, the side of the positioning ring is engaged with a first transmission tooth through the first tooth groove, the first transmission tooth is rotatably connected to the inner side of the machine, the first transmission tooth and the first pulley are sleeved with a first transmission belt, the bottom side of the drive shaft is fixedly connected with a second pulley, the side of the drive shaft is engaged with a second transmission tooth, the second transmission tooth is rotatably connected to the inner side of the machine, and the first transmission tooth and the second transmission tooth are coaxially arranged and have equal diameters, and the second transmission tooth and the second pulley are sleeved with a second transmission belt.

[0008] Specific, the inner side of the positioning ring is rotatably connected with a tooth ring, the clamping rod is slidably connected with a synchronous gear, the synchronous gear and the tooth ring are engaged with each other, and the side of the synchronous gear abuts against the tooth ring, the end of the clamping rod is rotatably connected with an abutting head, the outer side of the positioning ring is obliquely installed with a plurality of laser pens, and the extension lines of the plurality of laser pens converge at the same point.

[0009] Specific, the lifting structure includes a support column, the inner side of the machine is slidably connected with the support column, and the outer side of the support column is threadedly connected with a threaded sleeve.

[0010] Specific, the top end of the support column is rotatably connected with a plurality of rolling balls, the top end of the support column abuts against the bottom side of the bearing plate through the rolling balls, the outer side of the threaded sleeve is provided with a second tooth groove, the threaded sleeve is engaged with a second bevel gear through the second tooth groove, the side of the second bevel gear is engaged with a first bevel gear, and the side of the first bevel gear is rotatably connected with the machine.

[0011] Specific, the welding structure includes a guide groove, the middle part of the machine is provided with the guide groove, the machine is slidably connected with a mounting sliding block through the guide groove, the middle part of the machine is rotatably connected with an adjusting screw, the adjusting screw is threadedly connected with the mounting sliding block, the side of the mounting sliding block is provided with a mounting arm, the end of the mounting arm is provided with a plasma welding gun, and the end of the plasma welding gun is located on the same horizontal plane as one end of the mounting arm adjacent to the mounting sliding block.

[0012] Specific, the adjusting structure includes a second spring, the end of the mounting arm is slidably connected with the mounting sliding block, the mounting arm and the mounting sliding block are fixedly connected with the second spring, the end of the mounting arm is slidably connected with a positioning sleeve, and the positioning sleeve is rotatably connected to the inner side of the mounting sliding block.

[0013] Specific, the positioning sleeve is slidably connected with a positioning block on both sides of the mounting arm, a third spring is fixedly connected between the positioning block and the positioning sleeve, a plurality of positioning tooth grooves are formed in the inner side of the mounting sliding block, the end of the positioning block is engaged with the mounting sliding block through the positioning tooth grooves, and the other end of the positioning block is in a hemispherical structure, and the spherical end of the positioning block abuts against the side surface of the mounting arm.

[0014] Specific, the bearing structure includes a limiting plate, two limiting plates are rotatably connected to the two sides of the bearing plate, the limiting plates on the two sides are symmetrically arranged, a pushing plate is rotatably connected to the end of the limiting plate, a control sliding rod is slidably connected to the end of the limiting plate, and the ends close to each other of the two control sliding rods on the same side are slidably connected to the inner side of an adjusting block.

[0015] Specific, a first spring is fixedly connected between the two control sliding rods on the same side, a release block is slidably connected to the side surface of the adjusting block, the two sides of the release block are in inclined surface structures, the two inclined side surfaces of the release block are slidably connected with the ends of the control sliding rods on the same side, respectively, a ratchet block is fixedly connected to the other end of the control sliding rod, a ratchet groove is formed in the inner side of the bearing plate, and the ratchet block is engaged with the bearing plate through the ratchet groove.

[0016] The beneficial effects of the present application are:

[0017] (1) The plasma arc welding machine, the inner side of the machine table is provided with a mounting structure, the top side of the mounting structure is provided with a positioning structure, the two parts to be welded can be synchronously rotated through the mounting structure, so that the welding gun obtains good welding effect in a fixed state, and the workpiece in a cylindrical structure can be stably and accurately fixed through the positioning structure.

[0018] (2) The plasma arc welding machine, the bottom side of the mounting structure is provided with a lifting structure, the height can be adjusted according to the specifications of the welding workpiece through the lifting structure, the cylindrical workpiece to be welded is fixed in the middle of the positioning ring through the positioning structure, and the bottom end of the workpiece abuts against the workpiece on the bearing plate, so that the precise positioning of the welding position is completed.

[0019] (3) The plasma arc welding machine, the middle of the machine table is provided with a welding structure, the inner side of the welding structure is provided with an adjusting structure, the welding work of the cylindrical workpiece can be quickly completed through the welding structure, and the welding angle of the plasma welding gun can be adjusted through the adjusting structure, so as to adapt to different welding needs.

[0020] (4) The plasma arc welding machine, the mounting structure is provided with a bearing structure, and the tubular or other special-shaped workpieces can be well fixed through the bearing structure. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection structure between the machine base and the support plate of the present invention;

[0024] Figure 3 for Figure 2 The diagram shows an enlarged view of part A.

[0025] Figure 4 This is a schematic diagram of the connection structure between the positioning ring and the clamping rod of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection structure between the drive sleeve and the carrier plate of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the support plate and the limiting plate of the present invention;

[0028] Figure 7 for Figure 6 The diagram shows an enlarged view of part B.

[0029] Figure 8 This is a schematic diagram of the structure of the support plate of the present invention;

[0030] Figure 9 Figure 8 shows an enlarged schematic diagram of section C.

[0031] Figure 10 This is a schematic diagram of the connection structure between the mounting arm and the plasma welding torch of the present invention;

[0032] Figure 11 for Figure 10 The diagram shows an enlarged view of section D.

[0033] Figure 12 This is a schematic diagram of the connection structure between the mounting slider and the mounting arm of the present invention.

[0034] In the figure: 1, machine table; 2, placement structure; 201, bearing plate; 202, positioning ring; 203, drive shaft; 204, first pulley; 205, first transmission belt; 206, first transmission tooth; 207, first tooth groove; 208, second pulley; 209, second transmission belt; 210, second transmission tooth; 211, drive sleeve; 3, positioning structure; 301, clamping rod; 302, abutting head; 303, tooth ring; 304, synchronous gear; 305, laser pen; 4, lifting structure; 401, first bevel gear; 402, support column; 403, threaded sleeve; 404, second bevel gear; 405, second tooth groove; 406, ball; 5, welding structure; 501, adjusting screw; 502, guide groove; 503, plasma welding gun; 504, mounting arm; 505, mounting sliding block; 6, bearing structure; 601, pushing plate; 602, limiting plate; 603, control sliding rod; 604, adjusting block; 605, first spring; 606, release block; 607, ratchet block; 608, ratchet groove; 7, adjusting structure; 701, second spring; 702, positioning sleeve; 703, positioning block; 704, third spring; 705, positioning tooth groove. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0036] As shown in Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 11 The plasma arc welding machine of the present application comprises a machine table 1, the inner side of the machine table 1 is provided with a placement structure 2, the top side of the placement structure 2 is provided with a positioning structure 3, the bottom side of the placement structure 2 is provided with a lifting structure 4, the middle part of the machine table 1 is provided with a welding structure 5, the inner side of the welding structure 5 is provided with an adjusting structure 7, and the placement structure 2 is provided with a bearing structure 6.

[0037] Specifically, as shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown in the figure, the arrangement structure 2 comprises a bearing plate 201, the bearing plate 201 is rotationally connected on the machine table 1, the bottom side of the bearing plate 201 is slidingly connected with a driving sleeve 211, the top side of the bearing plate 201 is provided with a positioning ring 202, the positioning ring 202 is rotationally connected on the top side of the machine table 1, the positioning ring 202 and the driving sleeve 211 are coaxially arranged and have equal diameters, the side of the machine table 1 is rotationally connected with a driving shaft 203, the top end of the driving shaft 203 is fixedly connected with a first pulley 204, the side of the positioning ring 202 is provided with a first tooth groove 207, the side of the positioning ring 202 is engaged with a first transmission tooth 206 through the first tooth groove 207, the first transmission tooth 206 is rotationally connected on the inner side of the machine table 1, the first transmission tooth 206 and the first pulley 204 are sleeved with a first transmission belt 205, the bottom side of the driving shaft 203 is fixedly connected with a second pulley 208, the side of the driving sleeve 211 is engaged with a second transmission tooth 210, the second transmission tooth 210 is rotationally connected on the inner side of the machine table 1, and the first transmission tooth 206 and the second transmission tooth 210 are coaxially arranged and have equal diameters, the second transmission tooth 210 and the second pulley 208 are sleeved with a second transmission belt 209.

[0038] The bearing plate 201 and the positioning ring 202 rotate at the same angular velocity, and since the driving sleeve 211 and the positioning ring 202 are coaxially arranged, the bottom end of the cylindrical workpiece fixed in the middle of the positioning ring 202 is in contact with the welding surface of the workpiece on the bearing plate 201, so that the two workpieces rotate synchronously, and the welding equipment can complete the welding operation along the fixed circular path, ensuring good welding effect.

[0039] Specifically, as shown in the figure, Figure 1 , Figure 2 , Figure 4 The positioning structure 3 comprises a clamping rod 301, the side of the positioning ring 202 is threadedly connected with a plurality of clamping rods 301, the included angle between adjacent clamping rods 301 is equal, the inner side of the positioning ring 202 is rotationally connected with a tooth ring 303, the clamping rod 301 is slidingly connected with a synchronous gear 304, the synchronous gear 304 and the tooth ring 303 are engaged with each other, and the side of the synchronous gear 304 is in contact with the tooth ring 303, the end of the clamping rod 301 is rotationally connected with a contact head 302, the outer side of the positioning ring 202 is obliquely installed with a plurality of laser pens 305, and the extension lines of the plurality of laser pens 305 converge at the same point.

[0040] When rotating any clamping rod 301, the clamping rod 301 will move inward, and other clamping rods 301 will be rotated synchronously through the transmission effect of the synchronous gear 304 and the tooth ring 303, so that the abutting heads 302 at the ends of all clamping rods 301 abut the side surface of the workpiece synchronously until the clamping and fixing of the workpiece are completed. Since the clamping rods 301 are rotated synchronously, any diameter workpiece can be fixed to the middle position of the positioning ring 202, maintaining the vertical state with the bottom bearing plate 201, and the laser pen 305 arranged on the side surface of the positioning ring 202 can position the height of the welding surface.

[0041] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 The lifting structure 4 includes a support column 402, the inner side of the machine table 1 is slidingly connected with the support column 402, the outer side of the support column 402 is threadedly connected with a threaded sleeve 403, the threaded sleeve 403 is rotationally connected to the inner side of the machine table 1, the top end of the support column 402 is rollingly connected with a plurality of rolling balls 406, the top end of the support column 402 abuts the bottom side of the bearing plate 201 through the rolling balls 406, the outer side of the threaded sleeve 403 is provided with a second gear slot 405, the threaded sleeve 403 is engaged with a second bevel gear 404 through the second gear slot 405, the side surface of the second bevel gear 404 is engaged with a first bevel gear 401, and the side surface of the first bevel gear 401 is rotationally connected with the machine table 1.

[0042] With the rotation of the threaded sleeve 403, the support column 402 can lift or lower the bearing plate 201 through the supporting effect of the rolling balls 406 on the top side. The extension lines of the plurality of laser pens 305 arranged on the positioning ring 202 are located at the same point and on the axis of the positioning ring 202. At this time, the user needs to adjust the height of the bearing plate 201 and the position of the workpiece on the bearing plate 201 until the convergence point of the light emitted by the laser pen 305 is located at the to-be-welded position of the workpiece. At this time, the position of the workpiece on the bearing plate 201 is maintained, and then the to-be-welded cylindrical workpiece is fixed in the middle of the positioning ring 202 through the positioning structure 3, and the bottom end of the workpiece abuts the workpiece on the bearing plate 201, so that the precise positioning of the welding position is completed.

[0043] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 10 、 Figure 11 、 Figure 12As shown, the welding structure 5 includes a guide groove 502, the middle of the machine table 1 is provided with the guide groove 502, the machine table 1 is slidably connected with a mounting sliding block 505 through the guide groove 502, the middle of the machine table 1 is rotatably connected with an adjusting screw 501, the adjusting screw 501 is threadedly connected between the mounting sliding block 505, the side surface of the mounting sliding block 505 is provided with a mounting arm 504, the end of the mounting arm 504 is provided with a plasma welding gun 503, the end of the plasma welding gun 503 is located on the same horizontal plane as one end of the mounting arm 504 adjacent to the mounting sliding block 505;

[0044] The mounting arm 504 can be adjusted in horizontal position by rotating the adjusting screw 501 to slide in the guide groove 502, so that the plasma welding gun 503 can be adjusted in position, and the workpiece of different diameters can be welded conveniently. After a certain horizontal movement, the end of the plasma welding gun 503 can be accurately aligned with the welding position of the workpiece, and the synchronous rotation of the two workpieces can be realized by starting the motor to drive the driving shaft 203 to rotate. After one rotation of the workpiece, the plasma welding gun 503 can complete the welding between the two workpieces. Since all parts are in a fixed state during this process, the plasma welding gun 503 can accurately weld according to the welding path, thereby ensuring good welding quality.

[0045] Specifically, as shown in Figure 11 、 Figure 12 The adjusting structure 7 includes a second spring 701, the end of the mounting arm 504 is slidably connected with the mounting sliding block 505, the mounting arm 504 and the mounting sliding block 505 are fixedly connected with the second spring 701, the end of the mounting arm 504 is slidably connected with a positioning sleeve 702, the positioning sleeve 702 is rotatably connected to the inner side of the mounting sliding block 505, the positioning sleeve 702 is slidably connected with a positioning block 703 on both sides of the mounting arm 504, the positioning block 703 and the positioning sleeve 702 are fixedly connected with a third spring 704, the inner side of the mounting sliding block 505 is provided with a plurality of positioning tooth grooves 705, the end of the positioning block 703 is clamped with the mounting sliding block 505 through the positioning tooth grooves 705, the other end of the positioning block 703 is in a hemispherical structure, and the spherical end of the positioning block 703 abuts against the side surface of the mounting arm 504;

[0046] Pull the installation arm 504, so that the installation arm 504 is located at one end of the installation slider 505 slide off the positioning sleeve 702, at this time the positioning block 703 inside the positioning sleeve 702 spherical end will lose the effect of resistance, and then slide under the traction of the third spring 704, so that the other end of the positioning block 703 is out of the positioning tooth groove 705, at this time the user can rotate the installation arm 504, adjust the welding angle of the plasma torch 503, complete the adjustment, release the installation arm 504, at this time the end of the installation arm 504 re-push the positioning block 703, so that the end of the positioning block 703 and the current positioning tooth groove 705 are engaged, at this time the shell can fix the current installation arm 504 rotation angle, adapt to different welding needs.

[0047] Specifically, as shown in Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 The bearing structure 6 includes a limiting plate 602, both sides of the bearing plate 201 are rotatably connected with two limiting plates 602, the two limiting plates 602 on both sides are symmetrically arranged, the end of the limiting plate 602 is rotatably connected with a pushing plate 601, the end of the limiting plate 602 is slidably connected with a control slide rod 603, one end of the two control slide rods 603 on the same side is slidably connected with the inside of an adjusting block 604, the adjusting block 604 is slidably connected with the bearing plate 201, the first spring 605 is fixedly connected between the two control slide rods 603 on the same side, the side surface of the adjusting block 604 is slidably connected with a release block 606, both sides of the release block 606 are inclined surfaces, the two side inclined surfaces of the release block 606 are slidably connected with the end of the control slide rod 603 on the same side, the other end of the control slide rod 603 is fixedly connected with a ratchet block 607, the inside of the bearing plate 201 is provided with a ratchet groove 608, the ratchet block 607 is engaged with the bearing plate 201 through the ratchet groove 608;

[0048] The adjusting blocks 604 on both sides of the sliding bearing plates 201 push the limiting plates 602, at this time, slightly lifting the limiting plates 602 can make the limiting plates 602 rotate to the inclined state, at this time, continuously sliding the adjusting blocks 604 can change the angle of the limiting plates 602, after rotating the limiting plates 602 on both sides to the same inclined angle, the user can place the workpiece between the limiting plates 602 on both sides, due to the inclined surface structure of the limiting plates 602, the cylindrical or partially other shaped workpiece can be provided with good stability, thereby ensuring the smooth welding, the end of the control slide rod 603 inside the pushing plate 601 is provided with a ratchet block 607, through the setting of the ratchet block 607 and the ratchet groove 608, the limiting plates 602 can provide stable support effect, when it is needed to restore the position of the limiting plates 602, the user can press the release block 606 on the adjusting block 604 in the middle of both sides of the bearing plates 201, the release block 606 will push the control slide rods 603 on both sides through the inclined surface structure, so that the ratchet block 607 is separated from the ratchet groove 608, at this time, the limiting plates 602 can be reset.

[0049] In use, first, when welding the cylindrical workpiece, the user needs to place the two workpieces to be welded in the middle of the bearing plate 201 and the positioning ring 202, respectively, and after fixing the workpieces, the motor installed on the side of the machine 1 drives the drive shaft 203 to rotate, at this time, through the traction effect of the first transmission belt 205 and the second transmission belt 209, the first transmission gear 206 and the second transmission gear 210 rotate synchronously, and then drive the positioning ring 202 and the drive sleeve 211 to rotate, the bearing plate 201 is slidingly connected to the inside of the drive sleeve 211, at this time, the bearing plate 201 and the positioning ring 202 can rotate at the same angular velocity, and since the drive sleeve 211 and the positioning ring 202 are coaxially arranged, the bottom end of the cylindrical workpiece fixed in the middle of the positioning ring 202 can be in contact with the welding surface of the workpiece on the bearing plate 201, so that the two workpieces rotate synchronously, at this time, the welding equipment can complete the welding operation in a fixed state along the circular path, ensuring good welding effect. In order to fix the cylindrical workpiece through the positioning ring 202, a plurality of clamping rods 301 are threadedly connected to the side of the positioning ring 202, when fixing, the workpiece is placed inside the positioning ring 202, then any clamping rod 301 is rotated, the clamping rod 301 moves inward, and through the transmission effect of the synchronous gear 304 and the gear ring 303, the other clamping rods 301 rotate synchronously, so that the contact heads 302 at the ends of all clamping rods 301 contact the side of the workpiece synchronously, until the workpiece is clamped and fixed. Since the clamping rods 301 rotate synchronously, workpieces of any diameter can be fixed in the middle of the positioning ring 202, maintaining the vertical state with the bottom bearing plate 201. The laser pen 305 arranged on the side of the positioning ring 202 can position the height of the welding surface. In order to ensure the calibration of the welding position, after placing another workpiece on the bearing plate 201, the height of the bearing plate 201 needs to be adjusted, the user can directly rotate the first bevel gear 401 on the side of the machine 1, which can drive the threaded sleeve 403 to rotate through the second bevel gear 404. The support column 402 inside the threaded sleeve 403 is slidingly connected to the machine 1, and as the threaded sleeve 403 rotates, the support column 402 can lift or lower the bearing plate 201 through the support effect of the top ball 406. The extension lines of the plurality of laser pens 305 arranged on the positioning ring 202 are located at the same point and on the axis of the positioning ring 202, at this time, the user needs to adjust the height of the bearing plate 201 and the position of the workpiece on the bearing plate 201, until the convergence point of the light emitted by the laser pen 305 is located at the welding position of the workpiece, at this time, the position of the workpiece on the bearing plate 201 is maintained, then the cylindrical workpiece to be welded is fixed in the middle of the positioning ring 202 through the positioning structure 3, and the bottom end of the workpiece is in contact with the workpiece on the bearing plate 201, so that the welding position is accurately positioned, and after the workpiece to be welded is fixed,The plasma torch 503 for welding is installed on the mounting arm 504 in the middle of the machine table 1, which can be adjusted horizontally by sliding in the guide groove 502 through the rotating adjusting screw 501, facilitating the welding of workpieces of different diameters. The position of the plasma torch 503 is adjusted, and after a certain horizontal movement, the end of the plasma torch 503 will accurately align with the welding position of the workpiece. At this time, the motor drives the drive shaft 203 to rotate to achieve synchronous rotation of the two workpieces. After one revolution of the workpiece, the plasma torch 503 can complete the welding between the two workpieces. Since all parts are in a fixed state during this process, the plasma torch 503 will accurately weld according to the welding path, ensuring good welding quality. According to the shape, size, material, and other characteristics of the welded workpiece, the user can adjust the welding angle of the plasma torch 503. The mounting arm 504 and the mounting block 505 can rotate, and the end of the plasma torch 503 is located on the rotation axis of the mounting arm 504, so that the welding position of the plasma torch 503 does not change after the mounting arm 504 rotates. When adjusting the welding angle, the user first needs to pull the mounting arm 504 so that it slides away from the positioning sleeve 702 at one end of the mounting block 505. At this time, the spherical end of the positioning block 703 inside the positioning sleeve 702 loses the contact effect, and then slides under the traction of the third spring 704, so that the other end of the positioning block 703 is separated from the positioning tooth groove 705. At this time, the user can rotate the mounting arm 504 to adjust the welding angle of the plasma torch 503. After adjustment, release the mounting arm 504. At this time, the end of the mounting arm 504 pushes the positioning block 703 again, so that the end of the positioning block 703 is clamped with the current positioning tooth groove 705. At this time, the current rotation angle of the mounting arm 504 is fixed, adapting to different welding needs. When the carrier plate 201 cannot ensure the stable placement of the workpiece, the user can slide the adjusting block 604 on both sides of the carrier plate 201 to push the limiting plate 602 with the pushing plate 601. At this time, slightly lifting the limiting plate 602 can make it rotate to an inclined state. At this time, continue to slide the adjusting block 604 to change the angle of the limiting plate 602. After rotating the limiting plates 602 on both sides to the same inclined angle, the user can place the workpiece between the two limiting plates 602. Due to the inclined structure of the limiting plate 602, it can provide good stability for cylindrical or partially other shaped workpieces, ensuring smooth welding. The control slide rod 603 inside the pushing plate 601 is provided with a ratchet block 607 at the end, which, together with the ratchet groove 608, provides stable support for the limiting plate 602. When restoring the position of the limiting plate 602, the user can press the release block 606 on the adjusting block 604 in the middle of the carrier plate 201,The release block 606 pushes the control slide rods 603 on both sides through the inclined surface structure on both sides, so that the ratchet block 607 is disengaged from the ratchet groove 608, at which time the limiting plate 602 can be reset.

[0050] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be carried out in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, it is to be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present application is indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identification of the features to which the reference signs are attached.

[0051] Furthermore, it should be understood that although the present specification describes exemplary embodiments, the present specification does not limit the application to the details of the foregoing description. Rather, this description is made for the purpose of illustrating the general principles of the present application and can be put into practice with variations hereto appropriate to the skilled person in the art. The present specification and examples are therefore to be considered as illustrative and not restrictive, and it should be understood that the present application is not limited to the details of the foregoing description.

Claims

1. A plasma arc welder characterized by, Including machine table (1), the middle part of machine table (1) is equipped with welding structure (5), the inner side of machine table (1) is equipped with arrangement structure (2), the top side of arrangement structure (2) is equipped with positioning structure (3); The arrangement structure (2) includes a bearing plate (201), the bearing plate (201) is rotatably connected to the machine table (1), the bottom side of the bearing plate (201) is slidably connected with a drive sleeve (211), the top side of the bearing plate (201) is provided with a positioning ring (202), the positioning ring (202) is rotatably connected to the top side of the machine table (1), the positioning ring (202) and the drive sleeve (211) are coaxially arranged and have equal diameters, the positioning structure (3) includes a clamping rod (301), a plurality of clamping rods (301) are threadedly connected to the side of the positioning ring (202), the included angles between adjacent clamping rods (301) are equal; The arrangement structure (2) is provided with a bearing structure (6), the bearing structure (6) includes a limiting plate (602), two limiting plates (602) are rotatably connected to the two sides of the bearing plate (201), the two limiting plates (602) are symmetrically arranged, the end of the limiting plate (602) is rotatably connected with a pushing plate (601), the end of the limiting plate (602) is slidably connected with a control slide rod (603), the proximal ends of the two control slide rods (603) on the same side are slidably connected to the inner side of an adjusting block (604), the adjusting block (604) is slidably connected with the bearing plate (201); A first spring (605) is fixedly connected between the two control slide rods (603) on the same side, a release block (606) is slidably connected to the side of the adjusting block (604), the two sides of the release block (606) are inclined surfaces, the two side inclined surfaces of the release block (606) are slidably connected with the ends of the control slide rods (603) on the same side, the other end of the control slide rod (603) is fixedly connected with a ratchet block (607), a ratchet groove (608) is formed in the inner side of the bearing plate (201), the ratchet block (607) is engaged with the bearing plate (201) through the ratchet groove (608); The welding structure (5) includes a guide groove (502), the middle part of the machine table (1) is provided with a guide groove (502), the machine table (1) is slidably connected with a mounting sliding block (505) through the guide groove (502), the middle part of the machine table (1) is rotatably connected with an adjusting screw (501), the adjusting screw (501) is threadedly connected with the mounting sliding block (505), the side of the mounting sliding block (505) is provided with a mounting arm (504), the end of the mounting arm (504) is mounted with a plasma welding gun (503), the end of the mounting arm (504) adjacent to the mounting sliding block (505) and the end of the plasma welding gun (503) are located on the same horizontal plane. The inner side of the welding structure (5) is provided with an adjusting structure (7), the adjusting structure (7) comprises a second spring (701), the end of the mounting arm (504) is in sliding connection with a mounting sliding block (505), the mounting arm (504) and the mounting sliding block (505) are fixedly connected with the second spring (701), the end of the mounting arm (504) is in sliding connection with a positioning sleeve (702), and the positioning sleeve (702) is rotationally connected to the inner side of the mounting sliding block (505); The positioning sleeve (702) is in sliding connection with a positioning block (703) on the two sides of the mounting arm (504), the positioning block (703) and the positioning sleeve (702) are fixedly connected with a third spring (704), a plurality of positioning tooth grooves (705) are formed in the inner side of the mounting sliding block (505), the end of the positioning block (703) is clamped with the mounting sliding block (505) through the positioning tooth grooves (705), the other end of the positioning block (703) is in a hemispherical structure, and the spherical end of the positioning block (703) abuts against the side surface of the mounting arm (504).

2. A plasma arc welder as defined in claim 1 wherein: The side surface of the machine table (1) is rotationally connected with a driving shaft (203), the top end of the driving shaft (203) is fixedly connected with a first belt pulley (204), the side surface of the positioning ring (202) is provided with a first tooth groove (207), the side surface of the positioning ring (202) is engaged with a first transmission tooth (206) through the first tooth groove (207), the first transmission tooth (206) is rotationally connected to the inner side of the machine table (1), the first transmission tooth (206) and the first belt pulley (204) are sleeved with a first transmission belt (205), the bottom side of the driving shaft (203) is fixedly connected with a second belt pulley (208), the side surface of the driving sleeve (211) is engaged with a second transmission tooth (210), the second transmission tooth (210) is rotationally connected to the inner side of the machine table (1), the first transmission tooth (206) and the second transmission tooth (210) are coaxially arranged and have equal diameters, and the second transmission tooth (210) and the second belt pulley (208) are sleeved with a second transmission belt (209).

3. A plasma arc welder as defined in claim 1 wherein: The inner side of the positioning ring (202) is rotationally connected with a tooth ring (303), the clamping rod (301) is in sliding connection with a synchronous gear (304), the synchronous gear (304) and the tooth ring (303) are in engagement with each other, the side surface of the synchronous gear (304) abuts against the tooth ring (303), the end of the clamping rod (301) is rotationally connected with an abutting head (302), the outer side of the positioning ring (202) is obliquely provided with a plurality of laser pens (305), and the extension lines of the plurality of laser pens (305) converge at the same point.

4. A plasma arc welder as defined in claim 1 wherein: The bottom side of the arrangement structure (2) is provided with a lifting structure (4), the inner side of the machine table (1) is in sliding connection with a supporting column (402), and the outer side of the supporting column (402) is threadedly connected with a threaded sleeve (403).

5. A plasma arc welder as defined in claim 4 wherein: The top end of the support column (402) is connected with a plurality of rolling balls (406), the top end of the support column (402) is in abutment with the bottom side of the bearing plate (201) through the rolling balls (406), the outer side of the threaded sleeve (403) is provided with a second gear slot (405), the threaded sleeve (403) is engaged with a second bevel gear (404) through the second gear slot (405), the side surface of the second bevel gear (404) is engaged with a first bevel gear (401), and the side surface of the first bevel gear (401) is rotatably connected with the machine table (1).

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