Transformer assembly integrated machine and use method thereof

Abstract

The present invention proposes a transformer assembly integrated machine and a method for using the same, which solves the problems of poor adjustability, poor applicability and low welding efficiency of the traditional single-point welding method of silicon steel sheet groups. The main scheme includes: a turntable and a co-position frame erected on both sides of the turntable, a lower supporting chassis and a positioning member for positioning the lower supporting chassis are fixed on the top of the turntable, welding mechanisms are symmetrically fixed on both sides of the frame, and the welding mechanism includes a first driving member, a second driving member and an electric welding instrument, the first driving member is used to drive the electric welding instrument to rise and fall with the axial servo of the turntable, the second driving member is used to drive the electric welding instrument to move away from or approach the turntable in the horizontal direction, and a third driving member and an upper supporting chassis are also provided on the top of the co-position frame, the third driving member is used to drive the upper supporting chassis to rise and fall with the axial direction of the turntable, and the upper supporting chassis and the lower supporting chassis are respectively fitted with the upper and lower ends of the silicon steel sheet group of the external transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer manufacturing technology, and in particular to a transformer assembly all-in-one machine and a use method thereof. Background Art

[0002] In the manufacturing process of transformers, silicon steel sheets are generally used as the iron core of the transformer. Silicon steel itself has very strong magnetic conductivity. In the energized coil, it can produce an induction intensity that ordinary materials cannot produce. Compared with other materials, the volume of silicon steel is also smaller. In actual production, multiple sheets of silicon steel are generally folded and stacked, and then welded to form an overall iron core structure.

[0003] The existing assembly and welding process is mostly point-to-point operation of a single electric welding device. This method is obviously not suitable for the multi-batch production process of small transformers. It has low repeatability and low welding efficiency. Therefore, we propose a transformer assembly all-in-one machine and its use method to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art, and the present invention proposes a transformer assembly integrated machine and a method of using the same, which can weld each surface of the silicon steel sheet group in the transformer in an uninterrupted manner, and the welding efficiency is higher.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a transformer assembly integrated machine, comprising: a turntable and a co-position frame mounted on both sides of the turntable, a servo-rotating turntable is exposed on the top of the turntable and a plurality of positioning members are fixed around the side of the turntable, a lower supporting chassis is fixed on the top of the turntable, the positioning member is used to position the lower supporting chassis, welding mechanisms are symmetrically fixed on both sides of the frame, the welding mechanism comprises a first driving member, a second driving member and an electric welding instrument, the first driving member is used to drive the electric welding instrument to The turntable is servo-operated to lift and lower in the axial direction, and the second driving member is used to drive the welding instrument to move away from or approach the turntable in the horizontal direction. A tightening mechanism is also fixed to the top of the same-position frame, and the tightening mechanism includes a third driving member and an upper supporting chassis. The upper supporting chassis is coaxially arranged with the lower supporting chassis. The third driving member is used to drive the upper supporting chassis to lift and lower in the axial direction of the turntable. The upper supporting chassis and the lower supporting chassis are respectively attached to the upper and lower ends of the silicon steel sheet group of the external transformer. The first driving member, the second driving member and the third driving member are servo-controlled alternately.

[0006] Furthermore, the first driving member includes a screw rod, a sliding rod and a slide plate, the two ends of the screw rod are connected to the upper and lower end bearings of the alignment frame, the sliding rod is parallel to the screw rod, and its two ends are connected and fixed to the upper and lower ends of the alignment frame, one end of the slide plate is slidably connected to the sliding rod, and the other end is threadedly matched with the screw rod, and the alignment frame is also provided with a motor fixing hole at the top corresponding to the screw rod, and the motor fixing hole is used for positioning the external motor and driving the screw rod to rotate. .

[0007] Furthermore, the second driving member includes a slide rail, a guide platform, a pushing cylinder, a push rod and a fixed platform. The slide rail is fixed at the top center of the slide board, and its track is arranged horizontally toward the axis of the turntable. The pushing cylinder is connected and fixed to the end of the slide board, and its output end passes through the guide platform and is coaxially fixed to the push rod. The guide platform is vertically fixed to the end of the slide rail, the bottom of the fixed platform is slidably connected to the slide rail, and the back of the fixed platform is connected and fixed to the push rod, and the welding instrument is fixed on the top of the fixed platform.

[0008] Furthermore, the electric welding instrument comprises an adjustment block and a welding head. The adjustment block is provided with a plurality of adjustment slots equidistantly arranged in its height direction. The welding head is inserted and fixed in the adjustment slots and is electrically connected to the electric welding machine main unit.

[0009] Furthermore, the third driving member includes a lifting cylinder, a lifting rod, a compression disk, a reset disk and a connecting rod, the lifting cylinder is fixed at the top center of the synchronization frame, and its output end passes through the top surface of the synchronization frame and is connected and fixed to the center of the compression top, the lifting rod is vertically fixed to the top surface of the synchronization frame, and its bottom end passes through the synchronization frame and is slidably connected to the compression disk through the exposed shaft section, the bottom end of the lifting rod is exposed to the compression disk and the corresponding exposed shaft section is coated with a compression spring, the reset disk is located at the bottom of the compression disk, and its bottom surface is connected and fixed to the top surface of the upper supporting chassis through a connecting rod, the top end of the connecting rod is slidably sleeved on the outer wall of the bottom end of the lifting rod and a covering platform is provided at the corresponding connection, the covering platform is embedded and fixed on the reset disk, and its top end is used to cooperate with the bottom end of the compression disk to cover the compression spring.

[0010] Furthermore, the lifting rods and the connecting rods each include four, each of the lifting rods is coaxially arranged in a one-to-one correspondence with each of the connecting rods, and the connecting rods are equidistantly arranged around the side circumference of the upper supporting chassis.

[0011] Furthermore, the positioning members include a plurality of members which are equidistantly arranged around the outer side of the lower supporting chassis, and each of the positioning members includes a clamping cylinder and a clamping plate. The clamping cylinder is connected and fixed to the top of the turntable, and the clamping plate is a bent L-shaped structure, one end of which is connected and fixed to the output end of the clamping cylinder, and the other end can be pressed and contacted with the outer wall of the lower supporting chassis.

[0012] Furthermore, the upper supporting chassis has the same structure as the lower supporting chassis. The upper supporting chassis is formed by stacking a plurality of NR rubber-plastic blocks, and a mating opening is concave on the outer side thereof. The center of the upper supporting chassis is hollowed out and a contact platform is arranged on the top surface. The contact platform is flat and fits with the upper and lower ends of the silicon steel sheet group in the external transformer. The mating opening is used to fit the bottom end of the external transformer for embedding.

[0013] The method for using the above-mentioned transformer assembly machine includes the following steps:

[0014] S1. Connect the turntable to the external transformer production line, and use an external manipulator to pick up the small transformer on the transport line and position it on the lower supporting chassis on the top of the turntable. The placement position keeps the front of the silicon steel sheet group flush with the front of the turntable. At this time, the upper supporting chassis is in the initial position and remains unchanged;

[0015] S2, the upper chassis is servo-driven by the third driving member to shift in height, and cooperates with the lower chassis to achieve the covering pressure on the upper and lower end surfaces of the silicon steel sheet group, and the synchronous positioning member presses and positions the side wall of the lower chassis, and then the electric welding instruments on both sides perform the welding. During the welding process, the silicon steel sheet group remains stationary, the first driving member realizes the height change requirement of the welding position, and the second driving member realizes the approach or distance between the electric welding instrument and the silicon steel sheet group;

[0016] S3, after the welding at the current position is completed, the positioning member is reset, the third driving member is reset synchronously, and the turntable rotates 90 degrees in one direction to realize that the other side of the silicon steel sheet group is directly opposite to the electric welding instrument, and then the positioning member and the third driving member repeat their respective positioning operations, and the electric welding instrument continues to shift with the first driving member and the second driving member and welds the other side of the silicon steel sheet group;

[0017] S4, repeat the above steps S2-S3 until all the side welds of the silicon steel sheet group are completed, and then continue to clamp the material out by the external manipulator and carry out the feeding positioning of the next silicon steel sheet group.

[0018] Compared with the prior art, the beneficial effects of the present invention include: the upper supporting chassis is servo-driven by the third driving member to shift in height, and cooperates with the lower supporting chassis to achieve covering pressure on the upper and lower end surfaces of the silicon steel sheet group, the synchronous positioning member presses and positions the side wall of the lower supporting chassis, and then the electric welding instruments on both sides perform welding. During the welding process, the silicon steel sheet group remains stationary, and the first driving member cooperates with the second driving member to achieve a biaxial change of the welding position. It has a wider applicability and higher welding efficiency. The face-to-face repeated welding method is also more efficient and innovative than the traditional single-point welding method. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0020] Figure 1 Schematically shows an isometric structural diagram proposed according to one embodiment of the present invention;

[0021] Figure 2 Schematically shows a method according to an embodiment of the present invention. Figure 1 A partial enlarged view;

[0022] Figure 3 Schematically shows a front view according to an embodiment of the present invention

[0023] Figure 4 A perspective view according to an embodiment of the present invention is schematically shown.

[0024] Numbers in the figure: 1, turntable; 2, homonymous frame; 3, turntable; 4, positioning member; 401, clamping cylinder; 402, clamping plate; 5, lower supporting chassis; 6, first driving member; 601, screw rod; 602, slide rod; 603, slide plate; 604, motor fixing hole; 7, second driving member; 701, slide rail; 702, guide table; 703, push cylinder; 704, push rod; 705, fixed table; 8, welding instrument; 9, adjustment block; 10, welding head; 11, adjustment slot; 12, third driving member; 121, lifting cylinder; 122, lifting rod; 123, extrusion plate; 124, reset plate; 125, connecting rod; 126, compression spring; 127, pressure covering table; 13, upper supporting chassis; 14, NR rubber-plastic block; 15, matching mouth; 16, contact table. DETAILED DESCRIPTION

[0025] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0026] According to one embodiment of the present invention, Figure 1-Figure 4 Shown.

[0027] For the overall structure, Figure 1 as well as Figure 3As shown, a transformer assembly machine comprises: a turntable 1 and a co-position frame 2 mounted on both sides of the turntable 1, a servo-rotating turntable 3 is exposed on the top of the turntable 1 and a plurality of positioning members 4 are fixed around the side of the turntable 3, a lower supporting chassis 5 is fixed on the top of the turntable 1, and the positioning member 4 is used to position the lower supporting chassis 5, and welding mechanisms are symmetrically fixed on both sides of the frame, and the welding mechanism comprises a first driving member 6, a second driving member 7 and an electric welding instrument 8, the first driving member 6 is used to drive the electric welding instrument 8 to servo lift the turntable 3 axially, and the second driving member 7 is used to drive the electric welding instrument 8 to servo lift the turntable 3 axially. The driving member 7 is used to drive the electric welding instrument 8 to move away from or approach the turntable 3 in the horizontal direction. A tightening mechanism is also fixed to the top of the same-position frame 2. The tightening mechanism includes a third driving member 12 and an upper supporting chassis 13. The upper supporting chassis 13 is coaxially arranged with the lower supporting chassis 5. The third driving member 12 is used to drive the upper supporting chassis 13 to rise and fall axially with the turntable 3. The upper supporting chassis 13 and the lower supporting chassis 5 are respectively attached to the upper and lower ends of the silicon steel sheet group of the external transformer. The first driving member 6, the second driving member 7 and the third driving member 12 are servo-controlled alternately.

[0028] In actual design, the selection of the above-mentioned first, second and third driving members may include multiple types, which are not listed one by one here. Specifically, in this embodiment, the first driving member 6 includes a screw rod 601, a sliding rod 602 and a slide plate 603. The two ends of the screw rod 601 are connected to the upper and lower end bearings of the same position frame 2. The sliding rod 602 is parallel to the screw rod 601, and its two ends are connected and fixed to the upper and lower ends of the same position frame 2. One end of the slide plate 603 is slidably connected to the sliding rod 602, and the other end is threadedly matched with the screw rod 601. The same position frame 2 is also provided with a motor fixing hole 604 corresponding to the top of the screw rod 601. The motor fixing hole 604 is used for an external motor to position and drive the screw rod 601 to rotate.

[0029] The external motor is positioned through the motor fixing hole 604, and then synchronously drives the screw rod 601 to slide in the corresponding bearing seat. The slide plate 603 that is threaded with the screw rod 601 can be raised and lowered by the axial servo of the screw rod 601 under the axial limiting action of the slide rod 602, thereby realizing the subsequent height position change requirements of the welding instrument 8.

[0030] Similarly, the second driving member 7 includes a slide rail 701, a guide platform 702, a pushing cylinder 703, a push rod 704 and a fixed platform 705. The slide rail 701 is fixed to the top center of the slide plate 603, and its track is arranged horizontally toward the axis of the turntable 3. The pushing cylinder 703 is connected and fixed to the end of the slide plate 603, and its output end passes through the guide platform 702 and is coaxially fixed to the push rod 704. The guide platform 702 is vertically fixed to the end of the slide rail 701. The bottom of the fixed platform 705 is slidably connected to the slide rail 701, and the back of the fixed platform 705 is connected and fixed to the push rod 704. The welding instrument 8 is fixed on the top of the fixed platform 705.

[0031] After the cylinder 703 is pushed out, it can be limited by the guide table 702 and drive the fixed table 705 to slide in a directional manner along the track of the slide rail 701, so as to realize the moving away or approaching of the silicon steel sheet group after the relative positioning of the welding instrument 8, and cooperate with the height change requirement of the first driving member 6, that is, realize the dual-axis welding position change, with a higher degree of adaptability.

[0032] Furthermore, in order to adapt to more welding models, the electric welding instrument 8 in the present invention includes an adjustment block 9 and a welding head 10. The adjustment block 9 is provided with a plurality of adjustment grooves 11 equidistantly arranged in its height direction. The welding head 10 is inserted and fixed in the adjustment grooves 11 and is electrically connected to the electric welding machine main unit.

[0033] Correspondingly, the third driving member 12 includes a lifting cylinder 121, a lifting rod 122, a squeeze disk 123, a reset disk 124 and a connecting rod 125. The lifting cylinder 121 is fixed to the top center of the same position frame 2, and its output end passes through the top surface of the same position frame 2 and is connected and fixed to the squeeze top center. The lifting rod 122 is vertically fixed to the top surface of the same position frame 2, and its bottom end passes through the same position frame 2 and is slidably connected to the squeeze disk 123 when passing through the exposed shaft section. The bottom end of the lifting rod 122 is exposed. The extrusion disk 123 is provided and a compression spring 126 is coated on the corresponding exposed shaft section. The reset disk 124 is located at the bottom of the extrusion disk 123, and its bottom surface is connected and fixed to the top surface of the upper supporting chassis 13 through a connecting rod 125. The top end of the connecting rod 125 is slidably sleeved on the outer wall of the bottom end of the lifting rod 122 and a covering platform 127 is provided at the corresponding connection. The covering platform 127 is embedded and fixed on the reset disk 124, and its top end is used to cooperate with the bottom end of the extrusion disk 123 to cover the compression spring 126.

[0034] Furthermore, the lifting rods 122 and the connecting rods 125 each include four, each of the lifting rods 122 is coaxially arranged in a one-to-one correspondence with each of the connecting rods 125, and the connecting rods 125 are equidistantly arranged around the side circumference of the upper supporting chassis 13.

[0035] After the lifting cylinder 121 is output, it can push the extrusion plate 123 at the bottom to rise and fall in the same position. Since the top end of the connecting rod 125 is slidably sleeved on the outer wall of the bottom end of the lifting rod 122 and a pressure platform 127 is provided at the corresponding connection, as well as the design of the pressure platform 127 and the compression spring 126, the deformation of the compression spring 126 caused by the descending process of the extrusion plate can provide relative force for the subsequent resetting, which is convenient for the next re-pressing of the silicon steel sheet group. The silicon steel sheet group is positioned and clamped to the lower supporting chassis 5 by an external manipulator. The positioning is fast and efficient, and it can be placed facing the welding instrument 8, which is convenient for subsequent welding operations.

[0036] Similarly, the actual selection of the positioning member 4 may also include multiple types. Specifically, in this embodiment, the positioning member 4 includes multiple ones and is equidistantly arranged around the outer side of the lower supporting chassis 5. Each of the positioning members 4 includes a clamping cylinder 401 and a clamping plate 402. The clamping cylinder 401 is connected and fixed to the top of the turntable 1, and the clamping plate 402 is a bent L-shaped structure, one end of which is connected and fixed to the output end of the clamping cylinder 401, and the other end can be pressed and contacted with the outer wall of the lower supporting chassis 5.

[0037] Furthermore, the upper supporting chassis 13 has the same structure as the lower supporting chassis 5. The upper supporting chassis 13 is formed by stacking a plurality of NR rubber-plastic blocks 14, and a mating opening 15 is concave on the outer side thereof. The center of the upper supporting chassis 13 is hollowed out and a contact platform 16 is arranged on the top surface. The contact platform 16 is a plane and fits with the upper and lower ends of the silicon steel sheet group in the external transformer. The mating opening 15 is used to fit the bottom end of the external transformer.

[0038] According to the above structure record, the specific method of using the above transformer assembly machine includes the following steps:

[0039] S1, docking the turntable 1 with the external transformer production line, using an external manipulator to clamp the small transformer on the transport line and position it on the lower supporting chassis 5 on the top of the turntable 1, and the placement position keeps the front of the silicon steel sheet group flush with the front of the turntable 1, and the upper supporting chassis 13 is in the initial position unchanged;

[0040] S2, the upper chassis 13 is servo-driven by the third driving member 12 to shift in height, and cooperates with the lower chassis 5 to achieve the covering pressure on the upper and lower end surfaces of the silicon steel sheet group, and the synchronous positioning member 4 presses and positions the side wall of the lower chassis 5, and then the electric welding instruments 8 on both sides perform welding. During the welding process, the silicon steel sheet group remains stationary, the first driving member 6 realizes the height change requirement of the welding position, and the second driving member 7 realizes the approach or distance between the electric welding instrument 8 and the silicon steel sheet group;

[0041] S3, after the welding at the current position is completed, the positioning member 4 is reset, the third driving member 12 is reset synchronously, and the turntable 1 is rotated 90 degrees in one direction to realize that the other side of the silicon steel sheet group is directly opposite to the electric welding instrument 8, and then the positioning member 4 and the third driving member 12 repeat their respective positioning operations, and the electric welding instrument 8 continues to shift with the first driving member 6 and the second driving member 7 and welds the other side of the silicon steel sheet group;

[0042] S4, repeat the above steps S2-S3 until all the side welds of the silicon steel sheet group are completed, and then continue to clamp the material out by the external manipulator and carry out the feeding positioning of the next silicon steel sheet group.

[0043] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A transformer assembly machine, characterized in that: include: A turntable and a homonymous frame mounted on both sides of the turntable, a servo-rotating turntable is exposed on the top of the turntable and multiple groups of positioning parts are fixed on the side of the turntable, a lower supporting chassis is fixed on the top of the turntable, and the positioning part is used to position the lower supporting chassis, and welding mechanisms are symmetrically fixed on both sides of the frame, the welding mechanism includes a first driving member, a second driving member and an electric welding instrument, the first driving member is used to drive the electric welding instrument to servo lift and lower with the turntable axial direction, the second driving member is used to drive the electric welding instrument to move away from or approach the turntable in the horizontal direction, and a covering mechanism is also fixed on the top of the homonymous frame, the covering mechanism includes a third driving member and an upper supporting chassis, the upper supporting chassis is coaxially arranged with the lower supporting chassis, the third driving member is used to drive the upper supporting chassis to lift and lower with the turntable axial direction, the upper supporting chassis and the lower supporting chassis are respectively attached to the upper and lower ends of the silicon steel sheet group of the external transformer, and the first driving member, the second driving member and the third driving member are servo-controlled alternately.

2. The transformer assembly machine according to claim 1, characterized in that: The first driving member includes a screw rod, a sliding rod and a slide plate, the two ends of the screw rod are connected to the upper and lower end bearings of the alignment frame, the sliding rod is parallel to the screw rod, and the two ends thereof are connected and fixed to the upper and lower ends of the alignment frame, one end of the slide plate is slidably connected to the sliding rod, and the other end is threadedly engaged with the screw rod, and the alignment frame is also provided with a motor fixing hole corresponding to the top of the screw rod, and the motor fixing hole is used to position an external motor and drive the screw rod to rotate.

3. The transformer assembly machine according to claim 2, characterized in that: The second driving member includes a slide rail, a guide platform, a pushing cylinder, a push rod and a fixed platform. The slide rail is fixed to the top center of the slide plate, and its track is arranged horizontally toward the axis of the turntable. The pushing cylinder is connected and fixed to the end of the slide plate, and its output end passes through the guide platform and is coaxially fixed to the push rod. The guide platform is vertically fixed to the end of the slide rail, the bottom of the fixed platform is slidably connected to the slide rail, and the back of the fixed platform is connected and fixed to the push rod. The welding instrument is fixed on the top of the fixed platform.

4. The transformer assembly machine according to claim 3, characterized in that: The electric welding instrument comprises an adjusting block and a welding head. The adjusting block is provided with a plurality of adjusting grooves equidistantly arranged in its height direction. The welding head is inserted and fixed in the adjusting grooves and is electrically connected to the main body of the electric welding machine.

5. The transformer assembly machine according to claim 1, characterized in that: The third driving member includes a lifting cylinder, a lifting rod, an extrusion disk, a reset disk and a connecting rod. The lifting cylinder is fixed at the top center of the synchronization frame, and its output end passes through the top surface of the synchronization frame and is connected and fixed to the center of the extrusion top. The lifting rod is vertically fixed to the top surface of the synchronization frame, and its bottom end passes through the synchronization frame and is slidably connected to the extrusion disk through the exposed shaft section. The extrusion disk is exposed at the bottom end of the lifting rod and a compression spring is coated on the corresponding exposed shaft section. The reset disk is located at the bottom of the extrusion disk, and its bottom surface is connected and fixed to the top surface of the upper supporting chassis through a connecting rod. The top end of the connecting rod is slidably sleeved on the outer wall of the bottom end of the lifting rod and a covering pressure platform is provided at the corresponding connection. The covering pressure platform is embedded and fixed on the reset disk, and its top end is used to cooperate with the bottom end of the extrusion disk to cover the compression spring.

6. The transformer assembly machine according to claim 5, characterized in that: The lifting rods and the connecting rods each include four, each of the lifting rods is coaxially arranged in a one-to-one correspondence with each of the connecting rods, and the connecting rods are equidistantly arranged around the side circumference of the upper supporting chassis.

7. The transformer assembly machine according to claim 1, characterized in that: The positioning members include a plurality of members which are equidistantly arranged around the outer side of the lower supporting chassis. Each positioning member includes a clamping cylinder and a clamping plate. The clamping cylinder is connected and fixed to the top of the turntable. The clamping plate is a bent L-shaped structure, one end of which is connected and fixed to the output end of the clamping cylinder, and the other end can be pressed and contacted with the outer wall of the lower supporting chassis.

8. The transformer assembly machine according to claim 1, characterized in that: The upper supporting chassis has the same structure as the lower supporting chassis. The upper supporting chassis is formed by stacking a plurality of NR rubber-plastic blocks, and a mating opening is concave on the outer side thereof. The center of the upper supporting chassis is hollowed out and a contact platform is arranged on the top surface. The contact platform is flat and fits with the upper and lower ends of the silicon steel sheet group in the external transformer. The mating opening is used to fit the bottom end of the external transformer.

9. The method for using the transformer assembly machine according to any one of claims 1 to 8, characterized in that: The steps include: S1. Connect the turntable to the external transformer production line, and use an external manipulator to pick up the small transformer on the transport line and position it on the lower supporting chassis on the top of the turntable. The placement position keeps the front of the silicon steel sheet group flush with the front of the turntable. At this time, the upper supporting chassis is in the initial position and remains unchanged; S2, the upper chassis is servo-driven by the third driving member to shift in height, and cooperates with the lower chassis to achieve the covering pressure on the upper and lower end surfaces of the silicon steel sheet group, and the synchronous positioning member presses and positions the side wall of the lower chassis, and then the electric welding instruments on both sides perform the welding. During the welding process, the silicon steel sheet group remains stationary, the first driving member realizes the height change requirement of the welding position, and the second driving member realizes the approach or distance between the electric welding instrument and the silicon steel sheet group; S3, after the welding at the current position is completed, the positioning member is reset, the third driving member is reset synchronously, and the turntable rotates 90 degrees in one direction to realize that the other side of the silicon steel sheet group is directly opposite to the electric welding instrument, and then the positioning member and the third driving member repeat their respective positioning operations, and the electric welding instrument continues to shift with the first driving member and the second driving member and welds the other side of the silicon steel sheet group; S4. Repeat the above steps S2-S3 until all the side welds of the silicon steel sheet group are completed, and then continue to clamp the material out by the external manipulator and carry out the feeding positioning of the next silicon steel sheet group.

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