Double-station opening welding machine

Abstract

The utility model discloses a double-station junction welding machine which comprises a machine frame, two sets of stations used for welding cup rims are arranged on the machine frame, each station used for welding the cup rims comprises a supporting head, a jacking base and a welding mechanism, the supporting heads are arranged at the upper end of the machine frame through a first lifting assembly, and the jacking base is arranged at the lower end of the machine frame through a second lifting assembly. The jacking seat is arranged at the lower end of the rack through a second lifting mechanism, a rotating mechanism is arranged on the rack, the welding mechanism comprises a laser welding head, a height adjusting mechanism is arranged on the rack, a distance adjusting assembly is arranged on the height adjusting mechanism, and the laser welding head is arranged at the moving end of the distance adjusting assembly. The height adjusting mechanism, the distance adjusting mechanism and the fine adjustment assembly can accurately move the laser welding head in a three-dimensional space, it is guaranteed that the distance between a welding gun head and a vacuum cup body is always kept in the optimal state, and therefore the uniformity and welding quality of a welding seam are guaranteed; and vacuum cups of different sizes can be welded.

Description

Technical Field

[0001] This utility model relates to the field of welding machine technology, and in particular to a dual-station welding machine. Background Technology

[0002] A thermos typically consists of an outer shell and an inner liner. The outer shell is usually made by welding the cup body and the base together. Then, the inner liner is welded to the mouth of the outer shell. Welding is a crucial part of the entire manufacturing process. The traditional welding process involves fixing the welding torch to a support, and then placing the thermos on a turntable to rotate at a constant speed.

[0003] Chinese Patent CN210451552U discloses a cup arc bottom arc welding machine, including a support, a cup body mold base, a lower cylinder, a cup bottom mold base, and a welding machine. The cup body mold base and cup bottom mold base are mounted on the support. The lower cylinder is connected to the cup bottom mold base and drives it to move up and down. The welding machine is located on one side of the cup bottom mold base or the cup body mold base. The machine also includes a motor, a synchronous shaft, and a synchronous belt assembly. The motor is connected to the synchronous shaft and drives it to rotate. A middle synchronous pulley is located at the bottom of the cup body mold base, and a lower synchronous pulley is located at the bottom of the cup bottom mold base. The synchronous belt assembly connects the middle synchronous pulley, the lower synchronous pulley, and the synchronous shaft. This invention, through the synchronous shaft and synchronous belt assembly, ensures that the cup body mold base and the synchronous shaft rotate synchronously, guaranteeing seamless welding between the cup body and the cup bottom. It also ensures that the cup bottom mold base and the synchronous shaft rotate synchronously, thus guaranteeing seamless welding between the cup body and the cup bottom.

[0004] However, the welding machine of the above-mentioned device is fixedly installed on the bracket. Since the welding gun head is fixed, it is inconvenient to adjust the position of the welding gun head and the thermos cup body. The distance between the welding gun head and the thermos cup body will be too large or too small. Since the distance between the welding gun head and the thermos cup body is not adjusted accurately, the weld seam between the thermos cup bodies will be uneven.

[0005] Therefore, a dual-station welding machine is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a dual-station welding machine, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] A dual-station welding machine includes a frame with two sets of stations for welding cup rims. Each set of stations includes a support head, a lifting seat, and a welding mechanism.

[0009] The expansion head is arranged at the upper end of the rack through a first lifting assembly, the jacking seat is arranged at the lower end of the rack through a second lifting mechanism, the jacking seat is located directly below the expansion head, a rotating mechanism for driving the expansion head to rotate is arranged on the rack, the welding mechanism comprises a laser welding head, a height adjusting mechanism is arranged on the rack, a spacing adjusting assembly is arranged on the height adjusting mechanism, and the laser welding head is arranged at the moving end of the spacing adjusting assembly.

[0010] In the double-station welding machine according to the utility model, the height adjusting mechanism comprises two second columns, the two second columns are fixedly installed on the rack, a fixing seat is fixedly connected between the two second columns, a third screw rod is rotatably connected to the fixing seat, a gear box is fixedly installed at the bottom of the fixing seat, a worm is rotatably connected in the gear box, a worm wheel is rotatably installed in the gear box through a second annular seat, the worm is engaged with the worm wheel, the lower end of the third screw rod is threadedly rotatable and penetrates the inside of the worm wheel, a support seat is fixedly connected to the top of the third screw rod, the lifting seat is slidably sleeved on the second column, and one end of the worm is fixedly connected with a hand wheel.

[0011] In the double-station welding machine according to the utility model, the spacing adjusting assembly comprises a support seat, a first sliding rail is fixedly connected to the support seat, a first sliding block is slidably installed on the first sliding rail, a support plate is fixedly connected to the top of the first sliding block through a sliding seat, an electric push rod is fixedly installed on the support seat, the piston rod end of the electric push rod is fixedly connected to one side of the support plate, a guide insertion rod is fixedly connected to the support plate, one end of the guide insertion rod slidably penetrates the support seat, and the laser welding head is installed at the upper end of the support plate through a fine adjustment assembly.

[0012] In the double-station welding machine according to the utility model, the fine adjustment assembly comprises a manual multi-dimensional combined table, a second sliding block is fixedly installed on one side of the manual multi-dimensional combined table, a second sliding rail is fixedly connected to one side of the support plate, the second sliding block is slidably installed on the second sliding rail, a handle bolt is threadedly rotatably connected to the support plate, and the upper end of the handle bolt is rotatably connected to the bottom of the manual multi-dimensional combined table.

[0013] In the double-station welding machine according to the utility model, the top of the support plate is fixedly connected with a connecting rod, and one end of the connecting rod is rotatably connected with a positioning wheel.

[0014] In a double-station welding opening machine according to the utility model, the first lifting assembly comprises a first servo motor, a first support frame and a first guide rod, the first support frame is fixedly installed on the top of the rack, a second support frame is fixedly installed on the first support frame, the first servo motor is fixedly installed on the top of the second support frame, the lower end of the rotating shaft of the first servo motor is fixedly connected with a first lead screw through a shaft coupling, the upper end of the first guide rod is fixedly connected with an upper mounting plate after slidingly penetrating through the top of the rack, the upper mounting plate is threadedly rotatably sleeved on the first lead screw, the bottom of the first guide rod is fixedly connected with a lower mounting plate, and the opening head is rotatably connected to the lower end of the lower mounting plate.

[0015] In a double-station welding opening machine according to the utility model, the rotating mechanism comprises a second servo motor and two first synchronous gears, the second servo motor is fixedly installed on the upper end of the rack, one of the first synchronous gears is rotatably connected to the upper end of the rack through a first annular mounting seat, the other first synchronous gear is fixed on the rotating shaft of the second servo motor, the two first synchronous gears are drivingly connected through a first synchronous belt, the upper end of the opening head is fixedly connected with a rotating rod, the upper end of the rotating rod is slidingly arranged through the inner ring of the first synchronous gear, the upper end of the rotating rod is provided with a sliding groove, the inner ring of the first synchronous gear rotatably arranged on the first annular mounting seat is formed with a limiting slide block, and the limiting slide block is slidingly arranged in the sliding groove.

[0016] In a double-station welding opening machine according to the utility model, the second lifting mechanism comprises a lower mounting seat, the lower mounting seat is fixedly installed on the lower end of the rack, the lower mounting seat is fixedly installed with a third servo motor and a first stand column, a second lead screw is rotatably arranged on the lower mounting seat, the bottom of the rotating shaft of the third servo motor and the bottom of the first stand column are fixedly installed with second synchronous gears, the two second synchronous gears are drivingly connected through a second synchronous belt, a lower moving seat is slidingly sleeved on the first stand column, the lower moving seat is threadedly rotatably sleeved on the second lead screw, the top of the lower moving seat is fixedly connected with a second guide rod, the upper end of the second guide rod is fixedly connected with an upper moving seat after slidingly penetrating through the workbench of the rack, and the jacking seat is rotatably connected to the upper end of the upper moving seat.

[0017] In a double-station welding opening machine according to the utility model, the rack is fixedly installed with a controller, the third servo motor, the first servo motor and the second servo motor are all controlled by the controller.

[0018] The utility model at least has following beneficial effect:

[0019] The height adjusting mechanism, the distance adjusting mechanism and the fine adjustment assembly can be used for precise movement of the laser welding head in three-dimensional space, ensure that the distance between the welding gun head and the vacuum cup body is always kept in the best state, thereby ensuring the uniformity of the welding seam and the welding quality, and the vacuum cups with different sizes can be welded. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0021] Figure 1 It is a structure schematic view of the double-station welding opening machine of the utility model;

[0022] Figure 2 It is a partial structure schematic view of the double-station welding opening machine of the utility model;

[0023] Figure 3 It is a partial structure schematic view of the double-station welding opening machine of the utility model;

[0024] Figure 4 It is Figure 2 It is an enlarged structure schematic view of A part in

[0025] Figure 5 It is an enlarged structure schematic view of B part in Figure 4

[0026] Figure 6 It is a connection structure schematic view of the laser welding head and the height adjusting mechanism of the utility model;

[0027] Figure 7 It is a connection structure schematic view of the laser welding head and the height adjusting mechanism of the utility model.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1, rack;

[0030] 2, first lifting assembly; 201, first servo motor; 2011, first lead screw; 202, first support frame; 2021, second support frame; 203, first guide rod; 2031, upper mounting plate; 2032, lower mounting plate;

[0031] 3, second lifting mechanism; 301, lower mounting seat; 302, third servo motor; 303, second lead screw; 304, lower moving seat; 305, second guide rod; 306, upper moving seat; 307, jacking seat; 308, first vertical column; 309, second synchronous gear; 310, second synchronous belt; ​

[0032] 4, welding mechanism; 401, second stand; 4011, fixing seat; 4012, lifting seat; 4013, third screw rod; 4014, gear box; 4015, hand wheel;

[0033] 402, support seat; 4021, electric push rod; 4022, guide plug rod; 4023, first sliding rail; 4024, sliding seat; 4025, first sliding block; 4026, support plate; 4027, manual multi-dimensional combined table; 4028, handle bolt;

[0034] 403, laser welding head;

[0035] 404, connecting rod; 4041, positioning wheel;

[0036] 5, controller;

[0037] 6, rotating mechanism; 601, second servo motor; 602, first synchronous belt; 603, first synchronous gear; 6031, annular mounting seat; 604, rotating rod; 6041, sliding groove;

[0038] 7, expanding head. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be described in detail below with the accompanying drawings and examples, so that the realization process of how to apply technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

[0040] Please refer to Figures 1 to 7 The embodiment provides a double-station welding machine, which comprises a rack 1, two groups of stations for welding a cup mouth are arranged on the rack 1, and each group of stations for welding the cup mouth comprises an expanding head 7, a jacking seat 307 and a welding mechanism 4.

[0041] The expanding head 7 is arranged at the upper end of the rack 1 through a first lifting assembly 2, the jacking seat 307 is arranged at the lower end of the rack 1 through a second lifting mechanism 3, the jacking seat 307 is located directly below the expanding head 7, a rotating mechanism 6 for driving the expanding head 7 to rotate is arranged on the rack 1, the welding mechanism 4 comprises a laser welding head 403, a height adjusting mechanism is arranged on the rack 1, a spacing adjusting assembly is arranged on the height adjusting mechanism, and the laser welding head 403 is arranged at the moving end of the spacing adjusting assembly.

[0042] Specifically, in this embodiment, the height adjusting mechanism includes two second columns 401, both of which are fixedly installed on the rack 1, and a fixed seat 4011 fixedly connected between the two second columns 401, a third lead screw 4013 rotatably connected to the fixed seat 4011, a gear box 4014 fixedly installed at the bottom of the fixed seat 4011, a worm gear rotatably installed in the gear box 4014, a worm rotatably installed in the gear box 4014 through a second annular seat, the worm gear engaged with the worm, the lower end of the third lead screw 4013 threadedly penetrating the inside of the worm gear, a support seat 402 fixedly connected to the top of the third lead screw 4013, and a lifting seat 4012 slidingly sleeved on the second column 401, one end of the worm fixedly connected to a hand wheel 4015.

[0043] By adopting the above technical scheme, the hand wheel 4015 is rotated to drive the worm to rotate, the rotating worm drives the worm gear to rotate, the third lead screw 4013 is threadedly penetrating the inside of the worm gear, so the rotating worm gear drives the third lead screw 4013 to move downward or upward, the third lead screw 4013 is fixedly connected to the bottom of the lifting seat 4012, so the third lead screw 4013 moving upward or downward can drive the lifting seat 4012 to move upward or downward.

[0044] In this embodiment, the spacing adjusting assembly includes a support seat 402, a first sliding rail 4023 fixedly connected to the support seat 402, a first sliding block 4025 slidingly installed on the first sliding rail 4023, a support plate 4026 fixedly connected to the top of the first sliding block 4025 through a sliding seat 4024, an electric push rod 4021 fixedly installed on the support seat 402, the piston rod end of the electric push rod 4021 fixedly connected to one side of the support plate 4026, a guide insertion rod 4022 fixedly connected to the support plate 4026, one end of the guide insertion rod 4022 slidingly penetrating the support seat 402, and a laser welding head 403 installed on the upper end of the support plate 4026 through the fine adjustment assembly.

[0045] By adopting the above technical scheme, when the laser welding head 403 needs to be moved towards the cup mouth of the vacuum cup during use, the piston rod of the electric push rod 4021 is controlled to be elongated, and then the laser welding head 403 is driven to move towards the vacuum cup through the support plate 4026, so that the distance between the laser welding head 403 and the vacuum cup is within the welding set threshold, after the welding is completed, the piston rod of the electric push rod 4021 is controlled to be retracted, and then the laser welding head 403 is driven to move away from the vacuum cup, so as to avoid touching the laser welding head 403 when the vacuum cup is disassembled.

[0046] In the embodiment, the fine adjustment assembly comprises a manual multi-dimensional combination table 4027, one side of the manual multi-dimensional combination table 4027 is fixedly provided with a second sliding block, one side of a supporting plate 4026 is fixedly connected with a second sliding rail, the second sliding block is slidingly installed on the second sliding rail, the supporting plate 4026 is threadedly rotatably connected with a handle bolt 4028, and the upper end of the handle bolt 4028 is rotatably connected to the bottom of the manual multi-dimensional combination table 4027.

[0047] The manual multi-dimensional combination table 4027 can be used for fine adjustment of the positions of the X-axis and the Y-axis of the laser welding head 403, and the handle bolt 4028 can be used for fine adjustment of the height position of the Z-axis of the laser welding head 403 in cooperation with the second sliding block and the second sliding rail, thereby further improving the welding precision.

[0048] In the embodiment, the top of the supporting plate 4026 is fixedly connected with a connecting rod 404, and one end of the connecting rod 404 is rotatably connected with a positioning wheel 4041. When it is necessary to weld the cup mouth of the vacuum cup, the piston rod of the electric push rod 4021 is controlled to be elongated, and then the laser welding head 403 and the positioning wheel 4041 are driven by the supporting plate 4026 to move towards the vacuum cup, so that the positioning wheel 4041 is in contact with the outer wall of the vacuum cup, the distance between the laser welding head 403 and the vacuum cup is kept within a set range, and the uniformity of the weld and the welding quality are improved.

[0049] In the embodiment, the first lifting assembly 2 comprises a first servo motor 201, a first supporting frame 202 and a first guide rod 203. The first supporting frame 202 is fixedly installed on the top of the rack 1, and a second supporting frame 2021 is fixedly installed on the first supporting frame 202. The first servo motor 201 is fixedly installed on the top of the second supporting frame 2021, and the lower end of the rotating shaft of the first servo motor 201 is fixedly connected with a first lead screw 2011 through a shaft coupling. The upper end of the first guide rod 203 is slidingly penetrated through the top of the rack 1 and is fixedly connected with an upper mounting plate 2031, and the upper mounting plate 2031 is threadedly rotatably sleeved on the first lead screw 2011. The bottom of the first guide rod 203 is fixedly connected with a lower mounting plate 2032, and the opening head 7 is rotatably connected to the lower end of the lower mounting plate 2032.

[0050] The rotating mechanism 6 comprises a second servo motor 601 and two first synchronous gears 603. The second servo motor 601 is fixedly installed at the upper end of the rack 1. One of the first synchronous gears 603 is rotatably connected to the upper end of the rack 1 through a first annular mounting base 6031, and the other first synchronous gear 603 is fixed to the rotating shaft of the second servo motor 601. The two first synchronous gears 603 are drivingly connected through a first synchronous belt 602. The upper end of the propelling head 7 is fixedly connected with a rotating rod 604. The upper end of the rotating rod 604 slidably penetrates the inner ring of the first synchronous gear 603. The upper end of the rotating rod 604 is provided with a sliding groove 6041. The inner ring of the first synchronous gear 603 rotatably installed on the first annular mounting base 6031 is formed with a limiting sliding block. The limiting sliding block is slidably arranged in the sliding groove 6041.

[0051] The second lifting mechanism 3 comprises a lower mounting base 301 fixedly installed at the lower end of the rack 1. A third servo motor 302 and a first vertical column 308 are fixedly installed on the lower mounting base 301. A second screw rod 303 is rotatably installed on the lower mounting base 301. Second synchronous gears 309 are fixedly installed at the bottom of the rotating shaft of the third servo motor 302 and the bottom of the first vertical column 308. The two second synchronous gears 309 are drivingly connected through a second synchronous belt 310. A lower moving base 304 is slidably sleeved on the first vertical column 308. The lower moving base 304 is threadedly rotatably sleeved on the second screw rod 303. The top of the lower moving base 304 is fixedly connected with a second guide rod 305. The upper end of the second guide rod 305 slidably penetrates the rear of the workbench of the rack 1 and is fixedly connected with an upper moving base 306. A jacking base 307 is rotatably connected to the upper end of the upper moving base 306.

[0052] By setting the first lifting assembly 2, rotating mechanism 6 and second lifting mechanism 3, in use, the heat preservation cup to be welded is placed between the jacking seat 307 and the opening head 7, then the first servo motor 201 is controlled to drive the first lead screw 2011 to rotate, thereby driving the upper mounting plate 2031 to move downward, the downward moving upper mounting plate 2031 drives the lower mounting plate 2032 to move downward through the first guide rod 203, the opening head 7 rotates and is installed on the lower mounting plate 2032, so the opening head 7 moves downward and is pressed into the cup opening of the heat preservation cup, and the cup opening of the heat preservation cup is opened, at the same time, the third servo motor 302 is started, the second lead screw 303 is driven to rotate through the second synchronous gear 309 cooperating with the second synchronous belt 310, the upward moving lower moving seat 304 drives the upper moving seat 306 fixed on the top of the second guide rod 305 to move upward through the second guide rod 305, thereby making the jacking seat 307 drive the bottom of the heat preservation cup to move upward, thereby positioning the heat preservation cup between the jacking seat 307 and the opening head 7, then the second servo motor 601 is started, the rotating rod 604 is driven to rotate through the first synchronous gear 603 cooperating with the first synchronous belt 602, the rotating rod 604 is fixed on the top of the opening head 7, so the rotating rotating rod 604 drives the opening head 7 to rotate, thereby making the rotating opening head 7 drive the heat preservation cup to rotate, thereby enabling the heat preservation cup to be welded in all directions.

[0053] In the embodiment, the controller 5 is fixedly installed on the rack 1, the third servo motor 302, the first servo motor 201 and the second servo motor 601 are all controlled by the controller 5, and automatic operation of the equipment can be realized through the setting, and manual participation is reduced.

[0054] In some embodiments, a mechanical hand can be used for feeding and discharging.

[0055] The above description shows and describes several preferred embodiments of the utility model, but as described above, it should be understood that the utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified by the above teachings or related technical or knowledge within the scope of the utility model concept described herein. The modification and change made by the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A double station scarfing machine characterized by, The utility model relates to a cup mouth welding machine, including frame, be provided with two groups of work position for welding cup mouth on the frame, two groups of work position for welding cup mouth all include open head, jacking seat and welding mechanism, The open head is arranged at the upper end of the frame through a first lifting assembly, the jacking seat is arranged at the lower end of the frame through a second lifting mechanism, the jacking seat is located directly below the open head, a rotating mechanism for driving the open head to rotate is arranged on the frame, the welding mechanism includes a laser welding head, a height adjusting mechanism is arranged on the frame, a spacing adjusting assembly is arranged on the height adjusting mechanism, and the laser welding head is arranged at the moving end of the spacing adjusting assembly.

2. A double station scarfing machine according to claim 1, characterized in that: The height adjusting mechanism includes two second columns, both of which are fixedly installed on the frame, a fixed seat is fixedly connected between the two second columns, a third screw rod is rotatably connected to the fixed seat, a gear box is fixedly installed at the bottom of the fixed seat, a worm is rotatably connected in the gear box, a worm wheel is rotatably installed in the gear box through a second annular seat, the worm is engaged with the worm wheel, the lower end of the third screw rod is threadedly rotatable through the inside of the worm wheel, a support seat is fixedly connected to the top of the third screw rod, a lifting seat is slidably sleeved on the second column, and one end of the worm is fixedly connected to a hand wheel.

3. A double station welding machine according to claim 2, characterised in that: The spacing adjusting assembly includes a support seat, a first sliding rail is fixedly connected to the support seat, a first sliding block is slidably installed on the first sliding rail, a support plate is fixedly connected to the top of the first sliding block through a sliding seat, an electric push rod is fixedly installed on the support seat, the piston rod end of the electric push rod is fixedly connected to one side of the support plate, a guide plug rod is fixedly connected to the support plate, one end of the guide plug rod is slidably through the support seat, and the laser welding head is installed at the upper end of the support plate through a fine adjustment assembly.

4. A double station welding machine according to claim 3, characterised in that: The fine adjustment assembly includes a manual multi-dimensional combination table, a second sliding block is fixedly installed on one side of the support plate, a second sliding rail is fixedly connected to one side of the support plate, the second sliding block is slidably installed on the second sliding rail, a handle bolt is threadedly rotatably connected to the bottom of the manual multi-dimensional combination table.

5. A double station welding machine according to claim 4, characterised in that: The top of the support plate is fixedly connected to a connecting rod, and one end of the connecting rod is rotatably connected to a positioning wheel.

6. A double station welding machine according to claim 5, characterized in that: The first lifting assembly includes a first servo motor, a first support frame, and a first guide rod, the first support frame is fixedly installed at the top of the frame, a second support frame is fixedly installed on the first support frame, the first servo motor is fixedly installed at the top of the second support frame, a first screw rod is fixedly connected to the lower end of the rotating shaft of the first servo motor through a shaft coupling, an upper mounting plate is fixedly connected to the upper end of the first guide rod, the upper mounting plate is threadedly rotatably sleeved on the first screw rod, a lower mounting plate is fixedly connected to the bottom of the first guide rod, and the open head is rotatably connected to the lower end of the lower mounting plate.

7. A double station welding machine according to claim 6, characterized in that: The rotating mechanism comprises a second servo motor and two first synchronous gears, one of the first synchronous gears is rotatably connected to the upper end of the frame through a first annular mounting base, the other first synchronous gear is fixed on the rotating shaft of the second servo motor, the two first synchronous gears are connected through a first synchronous belt, the upper end of the dilating head is fixedly connected with a rotating rod, the upper end of the rotating rod is slidably arranged through the inner ring of the first synchronous gear, the upper end of the rotating rod is provided with a sliding groove, the inner ring of the first synchronous gear rotatably arranged on the first annular mounting base is provided with a limiting slide block, and the limiting slide block is slidably arranged in the sliding groove.

8. A double station welding machine according to claim 7, characterized in that: The second lifting mechanism comprises a lower mounting base, the lower mounting base is fixedly installed on the lower end of the frame, the lower mounting base is fixedly installed with a third servo motor and a first vertical column, the lower mounting base is rotatably installed with a second screw rod, the bottom of the rotating shaft of the third servo motor and the bottom of the first vertical column are fixedly installed with a second synchronous gear, the two second synchronous gears are connected through a second synchronous belt, the first vertical column is slidably sleeved with a lower moving seat, the lower moving seat is threadedly rotatably sleeved on the second screw rod, the top of the lower moving seat is fixedly connected with a second guide rod, the upper end of the second guide rod is slidably penetrated through the rear of the workbench of the frame and fixedly connected with an upper moving seat, and the jacking seat is rotatably connected to the upper end of the upper moving seat.

9. A double station welding machine according to claim 8, characterised in that: The frame is fixedly installed with a controller, and the third servo motor, the first servo motor and the second servo motor are controlled by the controller.

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