Multi-gun argon arc welder

Abstract

The application discloses a multi-gun argon arc welding machine and belongs to the technical field of motor manufacturing. The multi-gun argon arc welding machine comprises a rack (1), a pressing device is arranged on the rack (1), the pressing device comprises a lower pressing die (2) and an upper pressing die (3), a welding device is arranged above the lower pressing die (2), a tensioning device (7) is arranged below the lower pressing die (2), a material pushing device (8) is arranged on one side of the tensioning device (7), a driving mechanism three (9) for driving the lower pressing die (2) to move between the tensioning device (7) and the material pushing device (8) is arranged on the rack (1), a manipulator is further arranged on the rack (1), and a visual identification device (72) corresponding to the rack (1) is further arranged. The application can detect and adjust the stator punching sheet before welding, so that the thin and thick parts of the stator punching sheet are alternately overlapped and placed, the height difference of the stator laminations caused by the thickness difference of the stator punching sheet is compensated, and the qualified rate of the stator core is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of motor manufacturing, and particularly relates to a multi-gun argon arc welding machine for welding stator punching sheets. BACKGROUND

[0002] The stator core is the main magnetic circuit of the stator and is also the installation and fixing component of the stator winding. When the generator operates, the stator core is subjected to the combined action of mechanical force, thermal stress and electromagnetic force. In the production of the stator core, a plurality of layers of silicon steel punching sheets are stacked together, and the punching sheets are welded by a welding machine to obtain a stator core whole with accurate size and tight fit.

[0003] Due to the influence of factors such as uneven material, process error or uneven wear, the silicon steel sheet itself has a certain thickness tolerance, so that the punched stator punching sheet has uneven thickness. At this time, it is difficult to determine the height of the stator core to meet the dimensional accuracy requirements of production and processing by the number and overall weight of the stator silicon steel punching sheet. Therefore, during the lamination process before welding, the stator punching sheet needs to be adjusted to compensate for the height difference caused by the thickness difference of the stator punching sheet to ensure the dimensional accuracy of the stator core and improve the pass rate of the stator core. SUMMARY

[0004] The purpose of the present application is to overcome the technical problems in the prior art that the height of the stator core after stacking and welding does not meet the dimensional accuracy requirements of production and processing due to the thickness tolerance of the stator punching sheet, resulting in a low pass rate of the stator core. A multi-gun argon arc welding machine is provided, which can adjust the uneven thickness of the stator punching sheet during the lamination process before welding to compensate for the height difference caused by the thickness difference of the stator punching sheet, effectively improving the pass rate of the stator core.

[0005] In order to solve the above technical problems, the present application provides a multi-gun argon arc welding machine, which comprises a rack, a pressing device arranged on the rack, the pressing device comprising a lower pressing die for placing the stator punching sheet and an upper pressing die corresponding to the lower pressing die, the upper pressing die moving towards the lower pressing die under the drive of a drive mechanism one, a welding device arranged above the lower pressing die, the welding device comprising a welding gun head arranged in the circumferential direction of the stator punching sheet and a drive mechanism two for driving the welding gun head to move in the axial direction of the stator punching sheet, a tensioning device arranged below the lower pressing die and opposite to the welding device, a side of the tensioning device being provided with a material ejecting device, the rack being provided with a drive mechanism three for driving the lower pressing die to move between the tensioning device and the material ejecting device, the rack further being provided with a mechanical hand for placing the stator punching sheet, a drive mechanism eight for driving the mechanical hand to rotate, and a visual recognition device corresponding to the mechanical hand.

[0006] As a further improved measure of the present application, the upper part of the above-mentioned material feeding device is provided with a stator lamination feeding station, the visual recognition device comprises a visual recognizer corresponding to the feeding station, and a fixing plate for fixing the visual recognizer, and the fixing plate is provided with a driving mechanism four for adjusting the horizontal position of the visual recognizer.

[0007] As a further improved measure of the present application, the above-mentioned lower pressing die is provided as a columnar body, the outer surface of the lower pressing die is provided with a clamping strip along the axial direction of the lower pressing die, and the clamping strips are distributed along the circumferential direction of the lower pressing die, the lower pressing die is arranged on the rack through a base, the output end of the driving mechanism three is connected with the base, the two side surfaces of the base are respectively provided with positioning holes one, and the positioning assembly one is arranged at the tensioning device and the material feeding device, the positioning assembly one comprises a positioning block and a driving piece for driving the positioning block to be inserted into the positioning hole one.

[0008] As a further improved measure of the present application, the above-mentioned upper pressing die is arranged above the lower pressing die through a fixing frame one, the output end of the driving mechanism one is connected with a movable plate, the lower surface of the movable plate is provided with a mounting plate one for fixing the upper pressing die, the mounting plate one and the base are provided with a positioning assembly two, the positioning assembly two comprises a positioning rod arranged on the lower surface of the mounting plate one along the longitudinal direction and a positioning sleeve arranged on the upper surface of the base along the longitudinal direction, the positioning rod is provided with an elastic piece, and the positioning sleeve is provided with a positioning hole two for inserting the positioning rod.

[0009] As a further improved measure of the present application, the lower part of the above-mentioned mounting plate one is provided with a mounting plate two for fixing the welding gun head, the mounting plate two is provided with a through hole two corresponding to the upper pressing die, the mounting plate two and the movable plate are provided with a lifting assembly one, the lifting assembly one comprises a lead screw one and a lead screw nut one, the lower end of the lead screw one is fixed to the mounting plate two, the movable plate is provided with a through hole three for the upper end of the lead screw one to pass through, the lead screw nut one is arranged in the through hole three and rotationally matched with the lead screw one, the through hole three is further provided with a bearing one connected with the lead screw nut one, the output end of the driving mechanism two is provided with a synchronous pulley one, the movable plate is provided with a synchronous pulley two connected with the lead screw nut one, and the synchronous pulley one and the synchronous pulley two are provided with a belt one.

[0010] As a further improvement of the present application, the mounting plate two is sequentially provided with a gun rack corresponding to the welding gun head in the circumferential direction, the gun rack is provided with a driving mechanism five for driving the welding gun head to move towards the stator lamination, and the welding gun head is connected with the output end of the driving mechanism five through a moving plate.

[0011] As a further improvement of the present application, the rack is provided with a fixing frame two, which is arranged below the fixing frame one, the tensioning device comprises a tensioning member arranged on the fixing frame two and a driving mechanism six for driving the tensioning member to move in the longitudinal direction, the upper end of the tensioning member is provided with a "convex" shaped groove in the radial direction of the tensioning member, the lower end of the groove is a first groove, and the upper end of the groove is a second groove, and the lower surface of the base is provided with a clamping member matched with the first groove.

[0012] As a further improvement of the present application, the fixing frame two comprises a tensioning bottom plate and a tensioning moving plate arranged above the tensioning bottom plate, the lower end of the tensioning member is fixed to the upper surface of the tensioning moving plate, the tensioning bottom plate is fixed to the rack through a support one arranged in the longitudinal direction, the tensioning moving plate is provided with a through hole four for the support one to pass through, the through hole four is provided with a sliding sleeve one in sliding cooperation with the support one, a lifting assembly two is arranged between the tensioning bottom plate and the tensioning moving plate, the lifting assembly two comprises a lead screw two and a lead screw nut two, the tensioning bottom plate is provided with a through hole five, the through hole five is provided with a bearing two connected with the lower end of the lead screw two, the tensioning moving plate is provided with a through hole six for the upper end of the lead screw two to pass through, the lead screw nut two is arranged in the through hole six and in rotational cooperation with the lead screw two, the output end of the driving mechanism six is provided with a synchronous pulley three, the lead screw two is provided with a synchronous pulley four, and the synchronous pulley three and the synchronous pulley four are provided with a belt two.

[0013] As a further improvement of the present application, the rack is further provided with a fixing frame three, which is arranged on one side of the fixing frame two, the material lifting device comprises a lifting rod arranged on the fixing frame three and a driving mechanism seven for driving the lifting rod to move in the longitudinal direction, and the base is provided with a through hole seven for the lifting rod to pass through.

[0014] As a further improvement of the present application, the above-mentioned fixing frame three comprises a top feeding bottom plate and a top feeding movable plate arranged above the top feeding bottom plate, the top rod is fixed to the upper surface of the top feeding movable plate, the top feeding bottom plate is fixed to the rack through the support two arranged in the longitudinal direction, the top feeding movable plate is provided with a through hole eight for the support two to pass through, the through hole eight is provided with a sliding sleeve two matched with the support two, a lifting assembly three is arranged between the top feeding bottom plate and the top feeding movable plate, the lifting assembly three comprises a lead screw three and a lead screw nut three, a through hole nine is arranged in the top feeding bottom plate, a bearing three connected with the lower end of the lead screw three is arranged in the through hole nine, a through hole ten for the lead screw three to pass through is arranged in the top feeding movable plate, the lead screw nut three is arranged in the through hole ten and rotationally matched with the lead screw three, the output end of the driving mechanism seven is provided with a synchronous belt pulley five, a synchronous belt pulley six is sleeved on the lead screw three, and the synchronous belt pulley five and the synchronous belt pulley six are provided with a belt three.

[0015] Compared with the prior art, the present application has the following advantages: 1. The present application uses a visual identifier to identify and detect the stator punching sheet placed on the lower pressing die, and transmits the detection result to the manipulator used to place the stator punching sheet. The rotation of the stator punching sheet is driven by the manipulator to adjust the overlapping direction of the stator punching sheet, so that the thick and thin parts of the stator punching sheet are alternately overlapped, ensuring that the height and weight of each part of the stator core after welding are consistent, thereby effectively improving the yield of the stator core; 2. The present application uses the upper pressing die and the lower pressing die to press the stator punching sheet together, so that the adjacent two stator punching sheets are tightly pressed together to facilitate the completion of the subsequent welding process, ensure the product quality of the stator core, and the height and size of each stator core are the same, ensuring the yield; 3. The present application can automatically complete the feeding, pressing, welding and discharging of the stator punching sheet, realizing the integrated automatic processing process of the stator punching sheet welding, reducing the participation of manual work, improving the work efficiency, and ensuring the processing precision and the product quality of the stator core. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the present application.

[0017] Figure 2 is a left view of the present application.

[0018] Figure 3 is an enlarged perspective view of the visual identification device of the present application.

[0019] Figure 4 is an enlarged perspective view of the lower pressing die of the present application.

[0020] Figure 5 is an enlarged perspective view of the lower pressing die of the present application.

[0021] Figure 6 is one of the enlarged perspective views of the upper pressing die of the present application.

[0022] Figure 7 is the second enlarged perspective view of the upper pressing die of the present application.

[0023] Figure 8 is the enlarged perspective view of the tensioning device of the present application.

[0024] Figure 9 is the enlarged perspective view of the ejecting device of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS 1-frame, 2-lower pressing die, 3-upper pressing die, 4-driving mechanism one, 5-welding gun head, 6-driving mechanism two, 7-tensioning device, 8-ejecting device, 9-driving mechanism three, 10-clamping strip, 13-positioning hole one, 14-positioning block, 15-driving member, 17-fixed frame one, 18-moving plate, 19-mounting plate one, 23-positioning rod, 24-positioning sleeve, 25-elastic member, 26-positioning hole two, 27-mounting plate two, 28-through hole two, 29-screw rod one, 30-screw rod nut one, 32-bearing one, 33-synchronous pulley one, 34-synchronous pulley two, 35-gun holder, 36-driving mechanism five, 37-moving plate, 38-fixed frame two, 39-tensioning member, 40-driving mechanism six, 41-slot body, 42-first slot body, 43-second slot body, 44-clamping member, 46-tensioning bottom plate, 47-tensioning moving plate, 48-bracket one, 49-sliding sleeve one, 50-screw rod two, 52-bearing two, 53-synchronous pulley three, 54-synchronous pulley four, 60-fixed frame three, 61-ejecting rod, 62-driving mechanism seven, 63-ejecting bottom plate, 64-ejecting moving plate, 65-bracket two, 66-sliding sleeve two, 67-screw rod three, 68-screw rod nut three, 69-bearing three, 70-synchronous pulley five, 71-synchronous pulley six, 72-vision recognition device, 73-vision recognizer, 74-fixed plate, 75-driving mechanism four, 76-base. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings.

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0028] On the contrary, the present application covers any substitution, modification, equivalent method and scheme made within the gist and scope of the present application defined by the claims. Further, in order to make the public have a better understanding of the present application, some specific details are described in the following detailed description of the present application. The present application can also be completely understood without the description of these details by those skilled in the art.

[0029] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , the multi-gun argon arc welding machine comprises a rack 1, the rack 1 is provided with a pressing device, the pressing device comprises a lower pressing die 2 for placing a stator lamination and an upper pressing die 3 corresponding to the lower pressing die 2. The lower pressing die 2 is provided as a columnar body, the diameter of which is smaller than the diameter of the inner circle of the stator lamination, and the outer surface of the lower pressing die 2 is provided with a clamping strip 10 along the axial direction of the lower pressing die 2, and the clamping strips 10 are sequentially distributed along the circumferential direction of the lower pressing die 2, corresponding to the embedded wire grooves on the stator lamination, which can position the stator lamination in the circumferential direction and effectively prevent the stator lamination from falling off. The upper pressing die 3 moves towards the lower pressing die 2 under the drive of a driving mechanism I 4, which can be an electric cylinder or a servo motor. The upper pressing die 3 and the lower pressing die 2 jointly press and position the stator lamination.

[0030] A welding device is provided above the lower pressing die 2, which comprises a welding gun head 5 arranged along the circumferential direction of the stator lamination and a driving mechanism II 6 for driving the welding gun head 5 to move along the axial direction of the stator lamination. The welding gun head 5 is provided as an argon arc welding gun head 5, and the driving mechanism II 6 is provided as an electric motor. In this embodiment, the number of welding gun heads 5 is the same as the number of welding points on the outer surface of the stator lamination, which can complete the welding of the stator lamination at one time and improve the production efficiency. As other schemes, the welding gun head 5 can also be provided as 2, 3, 4, etc., and the welding of the welding points on the outer surface of the stator lamination can be realized by rotating the stator lamination.

[0031] As shown in Figure 1As shown, the lower part of the lower pressing die 2 is provided with a tensioning device 7, which is arranged opposite to the welding device, for positioning the lower pressing die 2 during welding, preventing the lower pressing die 2 from deviating and affecting the welding effect. One side of the tensioning device 7 is provided with a material ejecting device 8, which is used to eject the stator core after welding, so that the stator core is separated from the lower pressing die 2, and the subsequent mechanical hand can be easily taken. In this embodiment, the upper part of the tensioning device 7 is provided as a welding station of the stator punching sheet, and the upper part of the material ejecting device 8 is provided as a feeding station of the stator punching sheet, and the discharging of the stator core is also completed at the feeding station. The rack 1 is provided with a third driving mechanism 9 for driving the lower pressing die 2 to move between the tensioning device 7 and the material ejecting device 8. The third driving mechanism 9 can be a servo motor or a pneumatic cylinder. The third driving mechanism 9 drives the lower pressing die 2 to move above the material ejecting device 8, waits for the mechanical hand to place the stator punching sheet on the lower pressing die 2, and then drives the lower pressing die 2 to move above the tensioning device 7. The stator punching sheet is first pressed by the upper pressing die 3, and then welded by the welding device. After welding, the third driving mechanism 9 drives the lower pressing die 2 to reset, that is, to move above the material ejecting device 8 again for discharging.

[0032] As shown in Figures 1 to 3 Due to the difference in thickness of the silicon steel sheet, the thickness of the punched stator punching sheet at each end will be different. In order to ensure that the height and weight of each part of the processed stator core are consistent, the overlapping direction of the stator punching sheet needs to be adjusted before welding. Therefore, the rack 1 is also provided with a mechanical hand for placing the stator punching sheet, a driving mechanism eight for driving the mechanical hand to rotate, and a visual recognition device 72 corresponding to the rack hand. The driving mechanism eight is a servo motor. The visual recognition device 72 includes a visual recognizer 73 corresponding to the feeding station, and a fixing plate 74 for fixing the visual recognizer 73. The fixing plate 74 is provided with a fourth driving mechanism 75 for adjusting the horizontal position of the visual recognizer 73, and the fourth driving mechanism 75 is a servo motor. Before the mechanical hand clamps the stator punching sheet and places it into the lower pressing die 2, the visual recognizer 73 first recognizes and detects the mark groove on the stator punching sheet indicating the thick end, and transmits the detection result to the mechanical hand. The rotation of the mechanical hand is driven by the eighth driving mechanism, so that the mark groove on the overlapped stator punching sheet is distributed in the circumferential direction, and the thin and thick parts of the stator punching sheet are alternately overlapped, so as to compensate for the height difference of the stator punching sheet caused by the thickness difference of the stator punching sheet, and ensure that the height and weight of each part of the welded stator core are consistent.

[0033] As shown in Figure 1 and 2As shown, the lower pressing die 2 is arranged on the frame 1 through the base 76, and the output end of the driving mechanism three 9 is connected with the base 76. The two side surfaces of the base 76 are respectively provided with positioning holes one 13, and the positioning assembly one is arranged at the tensioning device 7 and the material ejecting device 8. The positioning assembly one comprises a positioning block 14 and a driving piece 15 for driving the positioning block 14 to be inserted into the positioning hole one 13. The driving piece 15 is arranged as a pneumatic cylinder. Through the clamping between the positioning block 14 and the positioning hole one 13, the positioning of the lower pressing die 2 at the tensioning device 7 and the material ejecting device 8 can be realized, the relative positions of the welding device and the lower pressing device 2 and the relative positions of the material ejecting device 8 and the lower pressing device 2 are ensured not to be deviated, and the machining precision is improved.

[0034] As shown in Figure 1 and Figure 6 , the upper pressing die 3 is arranged above the lower pressing die 2 through the fixed frame one 17. The fixed frame one 17 is provided with a through hole one, the output end of the driving mechanism one 4 passes through the through hole one and is connected with the movable plate 18, and the lower surface of the movable plate 18 is provided with the mounting plate one 19 for fixing the upper pressing die 3. Under the driving of the driving mechanism one 4, the movable plate 18 drives the mounting plate one 19 to move along the longitudinal direction towards the lower pressing die 2 until the upper pressing die 3 contacts and abuts against the stator lamination on the lower pressing die 2 and generates a pressing force.

[0035] In order to ensure the precision of the upper pressing die 3 during the longitudinal movement, in the embodiment, the upper surface of the movable plate 18 is provided with the guide rod one along the longitudinal direction, and the guide rod one is distributed along the circumferential direction of the driving mechanism one 4 in sequence, so that the forces of each part of the movable plate 18 are uniform and the movable plate 18 is always in a horizontal state. The fixed frame one 17 is provided with the through hole fourteen for the guide rod one to pass through, and the through hole fourteen is provided with the guide sleeve one in sliding fit with the guide rod one. The movement of the upper pressing die 3 along the axial direction of the guide rod one can be ensured, so that the stator lamination receives the same pressing force, which is beneficial to improve the welding effect. The upper end of the guide rod one passes through the guide sleeve one and is connected with the limiting plate one, so as to realize the connection between the guide rod one and the fixed frame one 17.

[0036] As shown in Figure 1 , Figure 4 and Figure 6As shown, in order to prevent the position between the upper pressing die 3 and the lower pressing die 2 from being deviated during the welding process, the positioning assembly two is arranged between the mounting plate one 19 and the base 76, the positioning assembly two comprises the positioning rod 23 arranged on the lower surface of the mounting plate one 19 in the longitudinal direction and the positioning sleeve 24 arranged on the upper surface of the base 76 in the longitudinal direction, the positioning rod 23 is sleeved with the elastic element 25, and the positioning sleeve 24 is internally provided with the positioning hole two 26 for inserting the positioning rod 23. When the driving mechanism one 4 drives the movable plate 18 to move in the longitudinal direction towards the lower pressing die 2, the positioning rod 23 is first inserted into the positioning hole two 26, thereby connecting the movable plate 18 and the base 76 together, so that the upper pressing die 3 and the lower pressing die 2 cannot move relatively, and the pressing and positioning of the stator punching sheet are ensured. The positioning rod 23 is sleeved with the elastic element 25, and the elastic element 25 is arranged as a compression spring and can be used for buffering.

[0037] As shown in Figure 1 , Figure 6 and Figure 7 , the mounting plate two 27 for fixing the welding gun head 5 is arranged below the mounting plate one 19, the mounting plate two 27 is internally provided with the through hole two 28 corresponding to the upper pressing die 3, and the upper pressing die 3 can pass through the through hole two 28. The lifting assembly one is arranged between the mounting plate two 27 and the movable plate 18, and is used for controlling the longitudinal movement of the mounting plate two 27. The lifting assembly one comprises the lead screw one 29 and the lead screw nut one 30, the lower end of the lead screw one 29 is fixed to the mounting plate two 27, the movable plate 18 is internally provided with the through hole three for the upper end of the lead screw one 29 to pass through, and the lead screw nut one 30 is arranged in the through hole three and rotationally matched with the lead screw one 29. The output end of the driving mechanism two 6 is provided with the synchronous pulley one 33, the movable plate 18 is provided with the synchronous pulley two 34 connected with the lead screw nut one 30, and the synchronous pulley one 33 and the synchronous pulley two 34 are provided with the belt one. Through the transmission of the belt one, the synchronous pulley two 34 drives the lead screw nut one 30 to rotate, so that the lead screw one 29 drives the mounting plate two 27 to move up and down in the longitudinal direction, and the welding gun head 5 moves along the axial direction of the stator punching sheet, thereby welding the stator punching sheet. The bearing one 32 connected with the lead screw nut one 30 is further arranged in the through hole five, so that the lead screw nut one 30 can rotate relative to the movable plate 18.

[0038] To ensure the accuracy of the welding gun head 5 during longitudinal movement, in this embodiment, the number of the first lifting components is set to two, which are oppositely arranged on both sides of the second mounting plate 27, so as to keep the horizontal heights on both sides of the second mounting plate 27 consistent during movement, that is, the welding gun head 5 is on the same horizontal line, which is beneficial to ensuring the welding effect. And a second guiding rod is arranged along the longitudinal direction on the upper surface of the second mounting plate 27, and the second guiding rods are respectively arranged on both sides of the second mounting plate 27, so that the forces on both sides of the second mounting plate 27 are evenly distributed and always in a horizontal state. A fifteenth through hole for the second guiding rod to pass through is formed on the first fixing frame 17, and a second guiding sleeve slidably matched with the second guiding rod is arranged in the fifteenth through hole, which can ensure that the second mounting plate 27 moves along the axial direction of the second guiding rod, and is beneficial to improving the welding effect. The upper end of the guiding rod passes through the second guiding sleeve and is connected to the second limiting plate, realizing the connection between the second guiding rod and the first fixing frame 17.

[0039] As Figure 7 shown, to fix the welding gun head 5, gun holders 35 corresponding to the welding gun head 5 are sequentially arranged along the circumferential direction on the second mounting plate 27. A fifth driving mechanism 36 for driving the welding gun head 5 to move towards the stator punching direction is arranged on the gun holder 35, and the welding gun head 5 is connected to the output end of the fifth driving mechanism 36 through a moving plate 37. The fifth driving mechanism 36 is set as a servo motor, which can adjust the relative position between the welding gun head 5 and the stator punching according to the size of the stator punching, and has better flexibility.

[0040] As Figure 1 and Figure 8 shown, a second fixing frame 38 is arranged on the machine frame 1, and the second fixing frame 38 is arranged directly below the first fixing frame 17. The tensioning device 7 includes a tensioning member 39 arranged on the second fixing frame 38 and a sixth driving mechanism 40 for driving the tensioning member 39 to move along the longitudinal direction. The sixth driving mechanism 40 is set as a motor. A groove body 41 with a "convex" - shaped structure is formed in the upper end of the tensioning member 39 along its radial direction, and the lower end part of the groove body 41 is set as a first groove body 42, and the upper end part of the groove body 41 is set as a second groove body 43. A clamping member 44 matched and clamped with the first groove body 42 is arranged on the lower surface of the base 76. The sixth driving mechanism 40 drives the tensioning member 39 to move longitudinally to a position corresponding to the clamping member 44. During the horizontal movement of the base 76, the clamping member 44 is clamped into the first groove body 42, realizing the connection between the tensioning member 39 and the lower pressing die 2. Then, the sixth driving mechanism 40 drives the tensioning member 39 to move downward to tension and position the lower pressing die 2.

[0041] The fixed frame two 38 comprises a tensioning bottom plate 46 and a tensioning movable plate 47 arranged above the tensioning bottom plate 46, the lower end of the tensioning member 39 is fixed to the upper surface of the tensioning movable plate 47, the tensioning bottom plate 46 is fixed to the rack 1 through the support one 48 arranged in the longitudinal direction, the tensioning movable plate 47 is provided with a through hole four for the support one 48 to pass through, the through hole four is provided with a sliding sleeve one 49 in sliding fit with the support one 48, and the support one 48 is arranged on both sides of the tensioning bottom plate 46 to ensure the stability of the tensioning movable plate 47. In order to realize the longitudinal movement of the tensioning member 39, the lifting assembly two is arranged between the tensioning bottom plate 46 and the tensioning movable plate 47, the lifting assembly two comprises a lead screw two 50 and a lead screw nut two, the tensioning bottom plate 46 is provided with a through hole five, the through hole five is provided with a bearing two 52 connected with the lower end of the lead screw two 50, so that the lead screw two 50 rotates relative to the tensioning bottom plate 46, the tensioning movable plate 47 is provided with a through hole six for the upper end of the lead screw two 50 to pass through, and the lead screw nut two is arranged in the through hole six and in rotary fit with the lead screw two 50, the output end of the driving mechanism six 40 is provided with a synchronous pulley three 53, the lead screw two 50 is sleeved with a synchronous pulley four 54, and the synchronous pulley three 53 and the synchronous pulley four 54 are provided with a belt two. Through the transmission of the belt two, the synchronous pulley four 54 drives the lead screw two 50 to rotate, so that the lead screw nut two drives the tensioning movable plate 47 to move in the longitudinal direction, and the mold 2 is tensioned.

[0042] As shown in Figure 1 and Figure 9 , the rack 1 is further provided with a fixed frame three 60, and the fixed frame three 60 is arranged on one side of the fixed frame two 38, and the ejector device 8 comprises an ejector rod 61 arranged on the fixed frame three 60 and a driving mechanism seven 62 for driving the ejector rod 61 to move in the longitudinal direction, the driving mechanism seven 62 is arranged as a motor, and the base 76 is provided with a through hole seven for the ejector rod 61 to pass through. Under the drive of the driving mechanism seven 62, the ejector rod 61 passes through the through hole seven and lifts the welded stator core upwards, so as to facilitate taking.

[0043] The fixed frame three 60 comprises a top material bottom plate 63 and a top material movable plate 64 arranged above the top material bottom plate 63, the top rod 61 is fixed to the upper surface of the top material movable plate 64, the top material bottom plate 63 is fixed to the rack 1 through the support two 65 arranged in the longitudinal direction, the top material movable plate 64 is provided with a through hole eight for the support two 65 to pass through, the through hole eight is provided with a sliding sleeve two 66 matched with the support two 65, the support two 65 is arranged on both sides of the top material bottom plate 63, so as to ensure the stability of the top material movable plate 64. In order to realize the longitudinal movement of the top material movable plate 64, the lifting assembly three is arranged between the top material bottom plate 63 and the top material movable plate 64, the lifting assembly three comprises a screw three 67 and a screw nut three 68, the top material bottom plate 63 is provided with a through hole nine, the through hole nine is provided with a bearing three 69 connected with the lower end of the screw three 67, so that the screw three 67 rotates relative to the top material bottom plate 63, the top material movable plate 64 is provided with a through hole ten for the screw three 67 to pass through, the screw nut three 68 is arranged in the through hole ten and matched with the screw three 67, the output end of the driving mechanism seven 62 is provided with a synchronous belt pulley five 70, the screw three 67 is provided with a synchronous belt pulley six 71, and the synchronous belt pulley five 70 and the synchronous belt pulley six 71 are provided with a belt three. Through the transmission of the belt three, the synchronous belt pulley six 71 drives the screw three 67 to rotate, so that the screw nut three 68 drives the top material movable plate 64 to move in the longitudinal direction, and the stator core is ejected.

[0044] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and some modifications and improvements can be made without departing from the present application, which should be regarded as belonging to the protection scope of the present application.

Claims

1. Multi-gun argon arc welding machine comprising a frame (1), characterized in that, A pressing device is provided on the frame (1). The pressing device includes a lower pressing die (2) for placing stator punching sheets, and an upper pressing die (3) corresponding to the lower pressing die (2). The upper pressing die (3) moves towards the lower pressing die (2) under the drive of a first drive mechanism (4). A welding device is provided above the lower pressing die (2). The welding device includes a welding gun head (5) arranged along the circumferential direction of the stator punching sheet and a second drive mechanism (6) for driving the welding gun head (5) to move along the axial direction of the stator punching sheet. A tensioning device (7) is provided below the lower pressing die (2), and the tensioning device (7) is arranged opposite to the welding device. A blanking device (8) is arranged on one side of the tensioning device (7). A third drive mechanism (9) for driving the lower pressing die (2) to move between the tensioning device (7) and the blanking device (8) is provided on the frame (1). A manipulator for placing stator punching sheets, an eighth drive mechanism for driving the manipulator to rotate, and a visual recognition device (72) corresponding to the manipulator are further provided on the frame (1). The lower pressing die (2) is arranged on the frame (1) through a base (76). The output end of the third drive mechanism (9) is connected to the base (76). Positioning holes one (13) are respectively formed on both side surfaces of the base (76). Positioning components one are provided at both the tensioning device (7) and the blanking device (8). The positioning component one includes a positioning block (14) and a driving member (15) for driving the positioning block (14) to be inserted into the positioning hole one (13). The upper pressing die (3) is arranged above the lower pressing die (2) through a first fixing frame (17). The output end of the first drive mechanism (4) is connected to a movable plate (18). An installation plate one (19) for fixing the upper pressing die (3) is arranged on the lower surface of the movable plate (18). A positioning component two is arranged between the installation plate one (19) and the base (76). The positioning component two includes a positioning rod (23) arranged along the longitudinal direction on the lower surface of the installation plate one (19) and a positioning sleeve (24) arranged along the longitudinal direction on the upper surface of the base (76). An elastic member (25) is sleeved outside the positioning rod (23). A positioning hole two (26) for inserting the positioning rod (23) is formed in the positioning sleeve (24). A second fixing frame (38) is provided on the frame (1), and the second fixing frame (38) is arranged directly below the first fixing frame (17). The tensioning device (7) includes a tensioning member (39) arranged on the second fixing frame (38) and a sixth drive mechanism (40) for driving the tensioning member (39) to move along the longitudinal direction. A groove body (41) with a "convex" - shaped structure is formed in the upper end of the tensioning member (39) along its radial direction, and the lower end part of the groove body (41) is a first groove body (42).The upper end of the groove body (41) is provided as a second groove body (43), and the lower surface of the base (76) is provided with a clamping member (44) matched with the first groove body (42).

2. The multiple torch argon arc welder of claim 1 wherein, The top material device (8) is arranged above the feeding station of the stator punching sheet, the visual recognition device (72) comprises a visual recognizer (73) corresponding to the feeding station, and a fixing plate (74) for fixing the visual recognizer (73) is arranged on the fixing plate (74), and a driving mechanism four (75) for adjusting the horizontal position of the visual recognizer (73) is arranged on the fixing plate (74).

3. The multiple torch argon arc welder of claim 1 wherein, The lower pressing die (2) is arranged as a columnar body, and the outer surface of the lower pressing die (2) is provided with a clamping strip (10) along the axial direction of the lower pressing die (2), and the clamping strips (10) are arranged along the circumferential direction of the lower pressing die (2).

4. The multiple torch argon arc welder of claim 3 wherein, The lower surface of the mounting plate one (19) is provided with a mounting plate two (27) for fixing the welding gun head (5), the mounting plate two (27) is provided with a through hole two (28) corresponding to the upper pressing die (3), and the mounting plate two (27) and the movable plate (18) are provided with a lifting assembly one, the lifting assembly one comprises a lead screw one (29) and a lead screw nut one (30), the lower end of the lead screw one (29) is fixed on the mounting plate two (27), the movable plate (18) is provided with a through hole three for the upper end of the lead screw one (29) to pass through, the lead screw nut one (30) is arranged in the through hole three and is in rotation with the lead screw one (29), the through hole three is further provided with a bearing one (32) connected with the lead screw nut one (30), the output end of the driving mechanism two (6) is provided with a synchronous belt pulley one (33), the movable plate (18) is provided with a synchronous belt pulley two (34) connected with the lead screw nut one (30), and the synchronous belt pulley one (33) and the synchronous belt pulley two (34) are provided with a belt one.

5. The multiple torch argon arc welder of claim 4 wherein, The mounting plate two (27) is provided with a gun rack (35) corresponding to the welding gun head (5) along the circumferential direction, the gun rack (35) is provided with a driving mechanism five (36) for driving the welding gun head (5) to move towards the stator punching sheet, and the welding gun head (5) is connected with the output end of the driving mechanism five (36) through a moving plate (37).

6. The multiple torch argon arc welder of claim 5 wherein, The fixed frame two (38) comprises a tensioning bottom plate (46) and a tensioning movable plate (47) arranged above the tensioning bottom plate (46), the lower end of the tensioning member (39) is fixed to the upper surface of the tensioning movable plate (47), the tensioning bottom plate (46) is fixed to the rack (1) through a support one (48) arranged in the longitudinal direction, the tensioning movable plate (47) is provided with a through hole four for the support one (48) to pass through, the through hole four is provided with a sliding sleeve one (49) in sliding fit with the support one (48), a lifting assembly two is arranged between the tensioning bottom plate (46) and the tensioning movable plate (47), the lifting assembly two comprises a lead screw two (50) and a lead screw nut two, the tensioning bottom plate (46) is provided with a through hole five, the through hole five is provided with a bearing two (52) connected with the lower end of the lead screw two (50), the tensioning movable plate (47) is provided with a through hole six for the upper end of the lead screw two (50) to pass through, the lead screw nut two is arranged in the through hole six and in rotary fit with the lead screw two (50), the output end of the driving mechanism six (40) is provided with a synchronous pulley three (53), the lead screw two (50) is provided with a synchronous pulley four (54), and the synchronous pulley three (53) and the synchronous pulley four (54) are provided with a belt two.

7. The multiple torch argon arc welder of claim 6 wherein, The rack (1) is further provided with a fixed frame three (60), and the fixed frame three (60) is arranged on one side of the fixed frame two (38), the ejecting device (8) comprises an ejecting rod (61) arranged on the fixed frame three (60) and a driving mechanism seven (62) for driving the ejecting rod (61) to move in the longitudinal direction, and the base (76) is provided with a through hole seven for the ejecting rod (61) to pass through.

8. The multiple torch argon arc welder of claim 7 wherein, The fixed frame three (60) includes a top material bottom plate (63) and a top material moving plate (64) arranged above the top material bottom plate (63), the top rod (61) is fixed to the upper surface of the top material moving plate (64), the top material bottom plate (63) is fixed to the rack (1) through the support two (65) arranged in the longitudinal direction, the top material moving plate (64) is provided with a through hole eight for the support two (65) to pass through, the through hole eight is provided with a sliding sleeve two (66) matched with the support two (65) to slide, the lifting assembly three is arranged between the top material bottom plate (63) and the top material moving plate (64), the lifting assembly three includes a lead screw three (67) and a lead screw nut three (68), the top material bottom plate (63) is provided with a through hole nine, the through hole nine is provided with a bearing three (69) connected with the lower end of the lead screw three (67), the top material moving plate (64) is provided with a through hole ten for the lead screw three (67) to pass through, the lead screw nut three (68) is arranged in the through hole ten and rotationally matched with the lead screw three (67), the output end of the driving mechanism seven (62) is provided with a synchronous belt pulley five (70), the lead screw three (67) is provided with a synchronous belt pulley six (71), and the synchronous belt pulley five (70) and the synchronous belt pulley six (71) are provided with a belt three.

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