Electromagnetic core automatic laser welding equipment

Abstract

The application discloses an electromagnetic core automatic laser welding device, which comprises a loading table assembly, a pre-pressing table for pre-pressing silicon steel sheets is arranged above the loading table assembly, laser welding guns are arranged on two adjacent sides of the loading table assembly and are used for welding the silicon steel sheets placed on the surface of the loading table assembly, and the loading table assembly is rotationally arranged above a base through a deflection mechanism; the loading table assembly comprises a stacking table and a discharging table, two groups of positioning pins for penetrating and positioning the silicon steel sheets are arranged on the surface of the stacking table, an inclined shifting mechanism is arranged below the stacking table, the inclined shifting mechanism can drive the two groups of positioning pins to be inclinedly shifted above the loading table assembly, and an adjustable calibration baffle is arranged at the terminal position of the displacement path of the positioning pins and is close to the stacking table. The electromagnetic core automatic laser welding device can effectively realize alignment work of the electromagnetic core with a complex shape under the premise of protecting the E-shaped silicon steel sheets.

Description

Technical Field

[0001] This invention relates to the field of workpiece calibration and welding technology, and in particular to an automatic laser welding device for electromagnet cores. Background Technology

[0002] Electromagnetic cores are typically formed by stacking multiple silicon steel sheets to reduce eddy current losses and improve magnetic properties. Among them, E-type silicon steel sheets, as a common irregular core structure unit, are widely used in transformers, reactors and various electromagnetic devices. In the manufacturing process, multiple E-type silicon steel sheets are usually stacked layer by layer in a predetermined direction to form a core assembly with a stable overall structure and continuous magnetic circuit. After stacking, they are fixed by laser welding to ensure the structural integrity and electromagnetic performance stability of the core during subsequent use. In actual processing, to meet the requirements of laser welding for weld position accuracy and stacking consistency, silicon steel sheets need to be aligned and stacked before welding. For example, CN209663999U discloses a silicon steel sheet pressing device, which also reflects the necessity of silicon steel sheet stacking. However, E-type silicon steel sheets are special, and they need to be assembled with I-type silicon steel sheets through tenon and mortise grooves during subsequent assembly. Therefore, there is a notch formed by stacking silicon steel sheets of different sizes at the pole position of the E-type silicon steel sheet. Existing technologies require manual or complex stacking devices to align the silicon steel sheets, which presents the following technical problems that need to be solved: I. The current auxiliary stacking equipment for E-type silicon steel sheets is too complex. It requires adaptive pushing and stacking for the side notches. The pushing mold cannot adapt to the stacking of notches of different shapes and sizes, so the stacking of E-type silicon steel sheets still relies heavily on manual operation. II. As per the instruction manual Figure 7 As shown, before the stacking, the silicon steel sheets in each layer are misaligned due to their layering and weight. The silicon steel sheets above the lower layer are affected by the gravity of the multiple layers of silicon steel sheets, resulting in a high static friction coefficient. When the stacking and pushing device contacts and pushes the silicon steel sheets at this location, the sides of the silicon steel sheets are easily deformed and bent under the weight and pushing, leading to gaps and misalignment between the layers. In severe cases, it may even damage the insulating layer on the surface of the silicon steel sheets, resulting in a decrease in magnetic properties and an increase in eddy current losses.

[0003] Therefore, how to provide an automatic laser welding device for electromagnet cores is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One objective of this invention is to provide an automatic laser welding device for electromagnet cores, which can effectively achieve the alignment of such complex-shaped electromagnet cores while protecting the E-type silicon steel sheets.

[0005] An automatic laser welding device for electromagnet cores according to an embodiment of the present invention includes a loading platform assembly. A pre-pressing platform for pre-pressing silicon steel sheets is disposed directly above the loading platform assembly. Laser welding guns are disposed on adjacent sides of the loading platform assembly for welding silicon steel sheets placed on the surface of the loading platform assembly. The loading platform assembly is rotatably disposed above a base via a deflection mechanism. The loading platform assembly includes a stacking platform and a unloading platform. Two sets of positioning pins for inserting and positioning silicon steel sheets are disposed on the surface of the stacking platform. An oblique shifting mechanism is disposed below the stacking platform. The oblique shifting mechanism can drive the two sets of positioning pins to move obliquely above the loading platform assembly. A calibration baffle is adjustablely disposed on the stacking platform near the end position of the positioning pin displacement path.

[0006] Preferably, the deflection mechanism mainly includes a main tooth, a transmission tooth, and three sets of pivot pins. The three sets of pivot pins are fixed in a linear, equidistant array on the bottom surface of the stacking platform. The transmission tooth is fixedly connected to the axial center of each set of pivot pins. The transmission tooth meshes directly above the main tooth. The output shaft of a torque motor is connected to one side of the main tooth, and the torque motor is fixed on the base support rod. The stacking platform is rotatably mounted at the end of the base support rod via the three sets of pivot pins.

[0007] Furthermore, the rotation angle between the loading platform assembly and the base is guaranteed to be within 120 degrees.

[0008] Furthermore, the deflection mechanism also includes two sets of pallets. The two sets of pallets move up and down on both sides of the stacking platform via electric cylinders fixed to the base at the bottom. The pallets can make horizontal contact with the edges of the stacking platform.

[0009] Preferably, the inclined sliding mechanism includes a ruler plate and an inclined wedge slide rail. The ruler plate slides in a wedge manner with the inclined wedge slide rail fixed to the bottom surface of the stacking platform through a wedge groove on its top surface. The sliding angle of the ruler plate is 135 degrees.

[0010] Furthermore, one side of the ruler plate is cut into a wedge surface, and a wedge block is wedge-shapedly fitted onto the surface of the wedge surface. One side of the wedge block is fixed to the output end of the actuator electric cylinder, and the actuator electric cylinder is fixed to the bottom surface of the unloading table.

[0011] Preferably, the bottom of the inclined movement mechanism is also provided with an inward retraction mechanism, which is used to drive the two sets of positioning pins to extend and retract up and down.

[0012] Furthermore, the internal retraction mechanism includes two sets of meshing gear shafts and a connecting plate. The axial position of a single set of meshing gear shafts is fixed to the output shaft of the transmission motor via a coupling. Connecting rods are fixed on the surfaces of the two sets of meshing gear shafts respectively. The two sets of connecting rods are distributed in opposite directions, and shaft wheels are rotatably set on both sides of the connecting rods away from the meshing gear shafts.

[0013] Furthermore, the axle wheel is rolled in the sliding groove opened on the surface of the connecting plate, and two sets of positioning pins are fixed on both sides of the connecting plate respectively, with the positioning pins sliding through the ruler plate.

[0014] The beneficial effects of this invention are: This invention can drive the loading platform assembly to rotate within a certain range of angles above the base through a deflection mechanism, so that the electromagnet core above the stacking platform can slide down towards the calibration baffle or unloading platform under the action of gravity, thereby cooperating with the positioning pin to push against the calibration baffle, and thus achieving the stacking operation and the unloading operation by using the weight of the electromagnet core itself without damaging the inner wall of the silicon steel sheet assembly hole. Compared with the prior art, it can better protect the electromagnet core. This invention can drive two sets of positioning pins to move obliquely through an oblique shifting mechanism, thereby pushing the silicon steel sheet towards the calibration baffle. By utilizing the limiting position of the calibration baffle and the thrust of the positioning pins, the silicon steel sheet can be stacked and positioned above the stacking platform. Compared with the existing technology, it does not require traditional manual labor or complex positioning equipment to perform precise stacking operations on complex E-type silicon steel sheets. The present invention, through the internal retraction mechanism, can push the connecting plate to move up and down at the bottom of the ruler plate under the drive of the meshing tooth shaft, thereby driving the positioning pin to move up and down, which can facilitate the stacking of silicon steel sheets and the subsequent unloading of silicon steel sheets. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the automatic laser welding equipment for electromagnet cores proposed in this invention; Figure 2 This is a side view of the overall structure of the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0016] Figure 3 This is a schematic diagram of the bottom structure of the stacking platform of the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0017] Figure 4 This is a schematic diagram of the top surface structure of the stacking platform of the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0018] Figure 5 This is a schematic diagram of the rotation posture of the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0019] Figure 6 This is a partial cross-sectional view of the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0020] Figure 7 This is a cross-sectional schematic diagram showing the location of the silicon steel sheet assembly hole in the automatic laser welding equipment for electromagnet cores proposed in this invention.

[0021] In the diagram: 1. Loading platform assembly; 2. Deflection mechanism; 3. Base; 4. Positioning pin; 5. Preload platform; 6. Laser welding gun; 7. Calibration baffle; 8. Shifting mechanism; 9. Retraction mechanism; 11. Stacking platform; 12. Unloading platform; 13. Elastic baffle; 21. Main gear; 22. Transmission gear; 23. Rotary pin seat; 24. Support plate; 81. Ruler plate; 82. Inclined wedge slide rail; 83. Wedge surface; 84. Wedge block; 85. Actuating electric cylinder; 91. Transmission motor; 92. Engaging gear shaft; 93. Connecting rod; 94. Shaft wheel; 95. Connecting plate; 96. Sliding groove. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] refer to Figures 1-7 The system includes a loading platform assembly 1, with a pre-pressing platform 5 positioned directly above it for pre-pressing silicon steel sheets. This ensures the silicon steel sheets are pre-pressed and shaped before welding. Laser welding guns 6 are positioned on adjacent sides of the loading platform assembly 1, used for segmented welding of the silicon steel sheets placed on the surface of the loading platform assembly 1 after pre-pressing and shaping. Additionally, the loading platform assembly 1 can be rotated above the base 3 via a deflection mechanism 2, changing its tilt angle relative to the horizontal plane. This tilt angle facilitates the gravity-driven sliding of the silicon steel sheets and aids in stacking. The loading platform assembly 1 includes a stacking platform 11 and a unloading platform 12. The surface of the stacking platform 11 has two sets of positioning pins 4 for inserting and positioning the silicon steel sheets. With the initial positioning by the positioning pins 4, the silicon steel sheets are stacked and ready for welding in the area above the stacking platform 11. When the stacking platform 11 is tilted, the silicon steel sheets can then be unloaded onto the unloading platform 12. 2. The material is discharged from one side, and an elastic baffle 13 is also provided inside the material feeding position of the feeding platform 12. The elastic baffle 13 can be a flexible buffer material to prevent the E-type silicon steel sheet from colliding with the inner wall of the feeding platform 12 during the discharge process and causing damage. An inclined shifting mechanism 8 is provided below the stacking platform 11. The inclined shifting mechanism 8 can drive two sets of positioning pins 4 to move obliquely above the loading platform assembly 1. An adjustable calibration baffle 7 is provided near the end of the displacement path of the positioning pins 4 on the stacking platform 11. It is mainly to facilitate the adjustment of the relative distance between the calibration baffle 7 and the positioning pins 4 so as to adapt to the assembly and positioning work of electromagnet cores of different sizes. While the inclined shifting mechanism 8 drives the two sets of positioning pins 4 to move obliquely, the positioning pins 4 can drive the silicon steel sheet to move towards the corner of the calibration baffle 7 through the assembly holes on the silicon steel sheet until the positioning pins 4 completely push all the silicon steel sheets and the corner of the calibration baffle 7 are aligned. After the rear end of the E-type silicon steel sheet is aligned, the tenon and mortise groove at the front end can assist in the alignment operation.

[0024] In this embodiment, silicon steel sheets are stacked on top of the stacking platform 11 and initially positioned by the positioning pin 4. At this time, there is a certain gap between the positioning pin 4 and the assembly hole of the silicon steel sheet, and the silicon steel sheet is only in the initial positioning stage. The tilting mechanism 8 can then drive the silicon steel sheet to the corner of the calibration baffle 7 through the positioning pin 4. The counteracting effect at the corner of the calibration baffle 7 is used to assist in the stacking operation of the silicon steel sheets. After stacking, the loading platform assembly 1 above the base 3 is rotated by the deflection mechanism 2 through the contact between the positioning pin 4 and the silicon steel sheet, so that the stacking platform 11 is tilted as a whole. In this state, the E-type silicon steel sheet slides down to the side of the unloading platform 12 under the action of gravity until it contacts the elastic baffle 13 inside the unloading platform 12, thus realizing the flexible unloading operation.

[0025] refer to Figure 2 , Figure 3 and Figure 5 The deflection mechanism 2 mainly includes a main tooth 21, a transmission tooth 22, and three sets of pivot pin seats 23. The three sets of pivot pin seats 23 are fixed in a linear equidistant array on the bottom surface of the stacking platform 11. The pivot pin seat 23 is fixedly connected to the transmission tooth 22 at its axial center position. That is, the transmission tooth 22 is fixed at the outer axial center position of the pivot pin seat 23 closest to one side. The transmission tooth 22 meshes directly above the main tooth 21. One side of the main tooth 21 is connected to the output shaft of the torque motor, and the torque motor is fixed on the support rod of the base 3. Therefore, when the torque motor is started, it can drive the main tooth 21 to rotate, thereby driving the transmission tooth 22 to rotate. Then, through the connection between the transmission tooth 22 and the pivot pin seat 23, the entire stacking platform 11 is driven to rotate above the base 3 with the pivot pin seat 23 as the center. Therefore, the stacking platform 11 needs to be rotatably set at the end of the support rod of the base 3 through the three sets of pivot pin seats 23. Here, the end of the support rod of the base 3 is also the rotation axis of the pivot pin seat 23. The rotation angle range between the loading platform assembly 1 and the base 3 is guaranteed to be within 120 degrees. It should be explained that the rotation angle range here is the sum of the forward and reverse rotation amplitudes of the pivot seat 23, which is 120 degrees. That is, with the horizontal plane as the reference, the stacking platform 11 can only rotate 60 degrees clockwise and 60 degrees counterclockwise. This is to ensure that the E-type silicon steel sheet on the top of the stacking platform 11 does not fall off, while changing the direction of gravity.

[0026] Furthermore, the deflection mechanism 2 also includes two sets of support plates 24. The two sets of support plates 24 move up and down on both sides of the stacking platform 11 via electric cylinders fixed to the base 3 at the bottom. The support plates 24 can make horizontal contact with the edges on both sides of the stacking platform 11. Under this condition, when the pre-pressing platform 5 pre-presses the silicon steel sheet on the top of the stacking platform 11, the pressure is directly transmitted to the base 3 through the support plates 24, thereby protecting the connection position between the pivot pin seat 23 and the end of the support rod of the base 3 from damage.

[0027] Example 1: After the silicon steel sheet above the stacking platform 11 is initially positioned by the locating pin 4, the main gear 21, under the action of the torque motor, can drive the entire stacking platform 11 to rotate around the axis of the pivot pin 23 above the base 3, so that it rotates as shown in the attached instruction manual. Figure 5 As shown, when the included angle is rotated clockwise by a maximum of 60 degrees, the E-type silicon steel sheet above the stacking platform 11 slides towards the calibration baffle 7. At the same time, the inclined movement mechanism 8 pushes the silicon steel sheet towards the calibration baffle 7 through the positioning pin 4. This disperses the weight of the E-type silicon steel sheet to a certain extent, thus dispersing the pressure on the lower silicon steel sheet and protecting the assembly hole of the silicon steel sheet. This prevents the problem that the silicon steel sheet cannot be pushed due to pressure after the positioning pin 4 contacts the assembly hole of a single silicon steel sheet. After the silicon steel sheet comes into contact with the calibration baffle 7, the positioning pin 4 assists in the pushing calibration process, so that the tenon groove at the front pole position of the silicon steel sheet can assist in self-alignment. Finally, by releasing the restriction of the silicon steel sheet by the positioning pin 4, the stacking table 11 is rotated in the opposite direction, so that the pre-pressed and welded electromagnet core slides down toward the unloading table 12, realizing the unloading operation.

[0028] refer to Figure 2 , Figure 3 , Figure 4 and Figure 6 Key reference Figure 3 The inclined sliding mechanism 8 includes a ruler plate 81 and an inclined wedge slide rail 82. The ruler plate 81 slides in a wedge manner with the inclined wedge slide rail 82, which is fixed to the bottom surface of the stacking platform 11, through a wedge groove on its top surface. At the same time, the surface is also elastically connected to the bottom surface of the stacking platform 11 through a tension spring to ensure the return to its original position after sliding. The sliding angle of the ruler plate 81 is 135 degrees. Figure 4 From a top-down perspective, the movement trajectory is 45 degrees. A wedge surface 83 is opened on one side of the ruler plate 81. The surface of the wedge surface 83 is wedge-shaped and fitted with a wedge block 84. One side of the wedge block 84 is fixed to the output end of the actuator electric cylinder 85. The actuator electric cylinder 85 is fixed to the bottom surface of the unloading table 12.

[0029] In this implementation scheme, during the output process of the electric cylinder 85, the wedge block 84 is driven to contact the wedge surface 83 on the surface of the ruler plate 81, pushing the ruler plate 81 as a whole to slide obliquely along the path of the inclined wedge slide rail 82, and simultaneously pulling the tension spring. During the sliding process, the two sets of positioning pins 4 are directly driven to slide obliquely above the stacking platform 11 through the inner shrinking mechanism 9. The silicon steel sheet is pushed towards the folding position of the calibration baffle 7 through the assembly hole of the silicon steel sheet, and finally the surface of the calibration baffle 7 is used to achieve auxiliary alignment. After the wedge block 84 retracts, the ruler plate 81 is automatically reset under the action of the tension spring.

[0030] refer to Figure 2 , Figure 3 , Figure 4 and Figure 6The bottom of the inclined movement mechanism 8 is also provided with an inner retraction mechanism 9. The inner retraction mechanism 9 is used to drive the two sets of positioning pins 4 to extend and retract up and down, which meets the needs of the initial stacking of silicon steel sheets and the subsequent unloading. The inner retraction mechanism 9 mainly includes two sets of meshing toothed shafts 92 and a single set of connecting plates 95. The single set of meshing toothed shafts 92 consists of two sets of meshing teeth and a shaft that passes through the two sets of meshing teeth. Both sets of meshing toothed shafts 92 are limited to rotating on the bottom surface of the ruler plate 81. The end of the shaft of the single set of meshing toothed shafts 92 is fixed to the output shaft of the transmission motor 91 through a coupling. After the transmission motor 91 is started, it can drive the two sets of meshing toothed shafts 92 to rotate in opposite directions. The surfaces of the two sets of meshing toothed shafts 92 are respectively fixed with connecting rods 93. The two sets of connecting rods 93 are distributed in opposite directions. The two sides of the connecting rods 93 away from the meshing toothed shafts 92 are respectively provided with rotating shaft wheels 94. The axle wheel 94 is rolled in the sliding groove 96 opened on the surface of the connecting plate 95. Therefore, when the connecting rod 93 is driven by the meshing gear shaft 92 and rotates, the axle wheel 94 below the connecting rod 93 can roll in the sliding groove 96 opened on the surface of the connecting plate 95. At the same time, two sets of positioning pins 4 are fixed on both sides of the connecting plate 95 respectively. The positioning pins 4 slide through the ruler plate 81, so that the connecting plate 95 can move up and down through the limiting effect of the positioning pins 4 and the ruler plate 81, and drive the positioning pins 4 to move up and down.

[0031] Working principle: At the start of the operation, multiple silicon steel sheets to be welded are stacked layer by layer on the stacking platform 11 of the loading platform assembly 1, and the silicon steel sheets are positioned in the working area between the calibration baffle 7 and the two sets of positioning pins 4. Then, the internal retraction mechanism 9 is activated, and the transmission motor 91 outputs power and drives the two sets of meshing gear shafts 92 to rotate in opposite directions through the coupling. When the two sets of meshing gear shafts 92 rotate, they drive the connecting rods 93 on their surfaces to swing synchronously. The shaft wheels 94 set on both sides of the end of the connecting rods 93 roll in the sliding grooves 96 opened on the surface of the connecting plate 95, thereby driving the connecting plate 95 to produce a vertical displacement relative to the ruler plate 81. This causes the two sets of positioning pins 4 fixed on both sides of the connecting plate 95 to rise along the guide direction of the ruler plate 81, so that the positioning pins 4 gradually pass through the ruler plate 81 from below the stacking platform 11 and continue to be inserted into the assembly holes of the silicon steel sheets. This completes the initial insertion and positioning of the silicon steel sheets on the stacking platform 11. After the positioning pin 4 is inserted into the silicon steel sheet assembly hole, the corresponding drive end of the deflection mechanism 2 is activated, causing the main gear 21 to rotate. The main gear 21 meshes with the transmission gear 22, and the transmission gear 22, through its connection with the pivot pin seat 23, drives the stacking platform 11 and the unloading platform 12 located on one side of the stacking platform 11 to deflect relative to the base 3. Since the three sets of pivot pin seats 23 are fixed on the bottom surface of the stacking platform 11 and serve as the support position for the loading platform assembly 1 to rotate relative to the base 3, the loading platform assembly 1 rotates at a predetermined angle above the base 3 around the axis corresponding to the pivot pin seat 23, causing the silicon steel sheet located on the stacking platform 11 to rotate as a whole. The posture changes towards the calibration baffle 7. After the loading platform assembly 1 completes this step of rotation, the oblique movement mechanism 8 is activated. Specifically, the output end of the electric cylinder 85 pushes the wedge block 84. The wedge block 84 acts on the ruler plate 81 along the wedge surface 83 corresponding to the inclined surface, causing the ruler plate 81 to slide along the oblique trajectory defined by the oblique wedge slide rail 82. This causes the inward retraction mechanism 9 and the two sets of positioning pins 4 set on the ruler plate 81 to move obliquely in sync with the ruler plate 81. Thus, the positioning pins 4 push the entire stack of silicon steel sheets towards the calibration baffle 7 while maintaining the state of being inserted into the silicon steel sheet assembly hole, until the silicon steel sheets are aligned with the calibration baffle 7 to complete the calibration. After the silicon steel sheet is aligned with the calibration baffle 7, the deflection mechanism 2 is controlled to move in the opposite direction, causing the main gear 21 and transmission gear 22 to drive the pivot seat 23 to rotate in the opposite direction, so that the loading platform assembly 1 returns to the welding position relative to the base 3. After the loading platform assembly 1 is reset, the two sets of support plates 24 are controlled to rise and lift and abut against the two sides of the stacking platform 11 respectively, so that the stacking platform 11 is in a supported state. Then the pre-pressing platform 5 moves from top to bottom to press down and shape the calibrated silicon steel sheet on the stacking platform 11. After the pre-pressing platform 5 completes the pressing and keeps the silicon steel sheet in a pressed state, the laser welding guns 6 located on the adjacent sides of the loading platform assembly 1 are started to perform segmented welding on the adjacent sides of the silicon steel sheet that has been positioned and pressed on the stacking platform 11, thereby completing the welding process of the electromagnet core. After welding, the pressure of the pre-pressing table 5 is released and the pallet 24 is retracted. Then, the oblique movement mechanism 8 is controlled to move in the opposite direction, so that the welded silicon steel sheet assembly is separated from the side wall of the calibration baffle 7. After that, the inward retraction mechanism 9 is started again, so that the two sets of positioning pins 4 retract downward along the ruler plate 81 and gradually disengage from the silicon steel sheet assembly hole. After the positioning pins 4 are completely withdrawn, the deflection mechanism 2 is controlled to continue to rotate the loading table assembly 1 in the opposite direction, so that the stacking table 11 forms a feeding tilt angle towards the unloading table 12. The welded electromagnet core slides from the stacking table 11 into the unloading table 12 under its own weight, and finally contacts the elastic baffle 13 inside the unloading table 12 to complete the buffer feeding.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic laser welding device for an electromagnet core, comprising a loading platform assembly (1), a pre-pressing platform (5) for pre-pressing silicon steel sheets is disposed directly above the loading platform assembly (1), and laser welding guns (6) are disposed on adjacent sides of the loading platform assembly (1) for welding silicon steel sheets placed on the surface of the loading platform assembly (1), characterized in that: The loading platform assembly (1) is rotatably mounted above the base (3) via a deflection mechanism (2); The loading platform assembly (1) includes a stacking platform (11) and a unloading platform (12). The surface of the stacking platform (11) is provided with two sets of positioning pins (4) for inserting and positioning silicon steel sheets. A tilting mechanism (8) is provided below the stacking platform (11). The tilting mechanism (8) can drive the two sets of positioning pins (4) to tilt above the loading platform assembly (1). A calibration baffle (7) is adjustablely provided near the end position of the displacement path of the positioning pins (4) on the stacking platform (11).

2. The automatic laser welding equipment for electromagnet cores according to claim 1, characterized in that, The deflection mechanism (2) mainly includes a main tooth (21), a transmission tooth (22) and three sets of pivot pins (23). The three sets of pivot pins (23) are fixed in a linear equidistant array on the bottom surface of the stacking platform (11). The pivot pin (23) is fixedly connected to the transmission tooth (22) at the axial position of a single set of pivot pins (23). The transmission tooth (22) meshes directly above the main tooth (21). The output shaft of the torque motor is connected to one side of the main tooth (21), and the torque motor is fixed on the support rod of the base (3). The stacking platform (11) is rotatably set at the end of the support rod of the base (3) through the three sets of pivot pins (23).

3. The automatic laser welding equipment for electromagnet cores according to claim 2, characterized in that, The rotation angle between the loading platform assembly (1) and the base (3) is guaranteed to be within 120 degrees.

4. The automatic laser welding equipment for electromagnet cores according to claim 2, characterized in that, The deflection mechanism (2) also includes two sets of pallets (24). The two sets of pallets (24) move up and down on both sides of the stacking platform (11) by electric cylinders that are fixed to the base (3) at the bottom. The pallets (24) can make horizontal contact with the edges of the stacking platform (11).

5. The automatic laser welding equipment for electromagnet cores according to claim 1, characterized in that, The inclined sliding mechanism (8) includes a ruler plate (81) and an inclined wedge slide rail (82). The ruler plate (81) slides in a wedge manner with the inclined wedge slide rail (82) fixed on the bottom surface of the stacking platform (11) through the wedge groove on the top surface. The sliding angle of the ruler plate (81) is 135 degrees.

6. The automatic laser welding equipment for electromagnet cores according to claim 5, characterized in that, The ruler plate (81) has a wedge surface (83) on one side. The wedge surface (83) is wedge-shaped and fits the wedge block (84). One side of the wedge block (84) is fixed to the output end of the electric cylinder (85). The electric cylinder (85) is fixed to the bottom surface of the unloading table (12).

7. The automatic laser welding equipment for electromagnet cores according to claim 1, characterized in that, The bottom of the slant mechanism (8) is also provided with an inward retraction mechanism (9), which is used to drive the two sets of positioning pins (4) to extend and retract up and down.

8. The automatic laser welding equipment for electromagnet cores according to claim 7, characterized in that, The internal retraction mechanism (9) includes two sets of meshing gear shafts (92) and a connecting plate (95). The axial position of a single set of meshing gear shafts (92) is fixed to the output shaft of the transmission motor (91) through a coupling. Connecting rods (93) are fixed on the surfaces of the two sets of meshing gear shafts (92) respectively. The two sets of connecting rods (93) are distributed opposite to each other. Axle wheels (94) are rotatably set on both sides of the end of the connecting rod (93) away from the meshing gear shaft (92).

9. An automatic laser welding device for electromagnet cores according to claim 8, characterized in that, The axle wheel (94) is rolled in the sliding groove (96) opened on the surface of the connecting plate (95), and two sets of positioning pins (4) are fixed on both sides of the connecting plate (95) respectively. The positioning pins (4) slide through the ruler plate (81).

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