A circular shaping mold for a straight stator core

Abstract

The present invention relates to a circular shaping die for a straight stator core. It includes a frame, a top pressing and shaping mechanism, a bottom pressing and shaping mechanism, and a circular pressing and shaping mechanism. In the present invention, the straight stator core is first sleeved on the shaping center die core, and then a plurality of circular pressing and shaping components press the straight stator core in sequence. The plurality of circular pressing and shaping components press the straight stator core into an annular shape, and make the two ends of the opening of the straight stator core abut against each other, so as to ensure the roundness of the straight stator core. Then, through the top pressing and shaping mechanism and the bottom pressing and shaping mechanism, the upper end surface and the lower end surface of the inner circle of the straight stator core are pressed up and down together. The top pressing and shaping mechanism and the bottom pressing and shaping mechanism press the parts at the same horizontal plane of the top of the straight stator core to be flush, and the bottom pressing and shaping mechanism presses the parts at the same horizontal plane of the bottom of the straight stator core to be flush, finally ensuring that the roundness and perpendicularity of the welded stator core meet the requirements and the product quality is qualified.

Description

Technical Field

[0001] The present invention relates to a circular shaping and sizing die for a straight stator core of a motor stator which is straight in its initial state and circular after shaping. Background Art

[0002] At present, most of the straight stator cores of motors are generally formed by winding. The shape of the straight stator core before winding is mostly circular. However, winding on a circular straight stator core has disadvantages such as difficult winding, long winding time, low slot fill factor, large waste of copper wire, and low production efficiency. Therefore, some use strip-shaped straight stator cores. The strip shape means that the straight stator core is strip-shaped before winding is completed. Winding on the slot shape of the strip-shaped straight stator core is less difficult and the production efficiency is high. After winding is completed, the strip-shaped straight stator core is then bent and shaped into a circular ring.

[0003] The existing circularizing device for straight stator cores presses them into a circular ring shape through multiple oil cylinders. However, although the stamping stroke of the oil cylinders is fixed, the stamping stroke of the oil cylinders cannot be adjusted. The oil cylinders always press to the bottom, which will cause the straight stator core after pressing to become oval, and its roundness is affected, resulting in product deformation. In addition, the existing circular shaping and sizing die for straight stator cores presses the top and bottom of the plastic skeleton of the straight stator core through upper and lower air cylinders to achieve vertical positioning of the straight stator core. However, the plastic skeleton of the straight stator core is prone to damage (having gaps), resulting in inconsistent heights at various parts of the straight stator core. Eventually, some positions of the pressed core are inclined and vertically misaligned, and the perpendicularity is affected. Therefore, the structure of the existing circularizing device for straight stator cores needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a circular shaping and sizing die for a straight stator core that improves the roundness and perpendicularity of the straight stator core and ensures the product quality of the straight stator core.

[0005] The purpose of the present invention is achieved as follows:

[0006] A circular shaping and sizing die for a straight stator core includes a frame, a shaping base, a top pressing and shaping mechanism, a bottom pressing and shaping mechanism, and a circular pressing and shaping mechanism.

[0007] The shaping base is arranged on the frame and is used for positioning and shaping the pre-bent straight stator core.

[0008] The bottom pressing and shaping mechanism is used for pressing down the upper end surface of the inner circle of the core of the straight stator core.

[0009] The top pressing and shaping mechanism is arranged on the frame and is used for pressing up the lower end surface of the inner circle of the core of the straight stator core.

[0010] The rounding and shaping mechanism comprises a plurality of rounding and shaping components which are arranged on a shaping seat in an annular manner and are used to press the straight stator core on the shaping seat into a circular ring shape and to make the two ends of the straight stator core abut against each other.

[0011] The present invention can also be further improved as follows.

[0012] A shaping center mold core and a shaping outer guide seat are provided on the shaping seat, the shaping outer guide seat is annular, the shaping center mold core is cylindrical, the shaping center mold core and the shaping outer guide seat are concentrically arranged, the shaping outer guide seat is located on the outside of the shaping center mold core, a plurality of positioning and giving way grooves are arranged at annular intervals on the outer side wall of the shaping center mold core, and a plurality of ejector pin giving way holes are arranged at annular intervals at the positions of the plurality of positioning and giving way grooves on the shaping seat.

[0013] A plurality of shaping guide rails are arranged at annular intervals on the shaping outer guide seat.

[0014] A positioning block is provided on the outer side wall of the shaping center mold core, and a vertical stator positioning protrusion is provided on the positioning block. When the pre-bent straight stator core is sleeved on the shaping center mold core, the stator positioning protrusion is inserted into the gap on the core circle of the straight stator core, thereby realizing the positioning of the straight stator core.

[0015] The positioning and giving way groove is in the shape of a vertical strip and plays a role of giving way and guiding. The positioning and giving way groove guides the flattening ejector pin and the flattening sleeve to slide up and down, and also plays a role of avoiding the flattening ejector pin from pressing on the inner circle of the straight stator core.

[0016] The round pressing and shaping component includes a shaping oil cylinder, a shaping round pressing slider, an adjusting slider, an adjusting fixed block, a first adjusting bolt and a second adjusting bolt. The rear end of the adjusting slider is slidably connected up and down to the oil cylinder connector of the shaping oil cylinder. The front end of the adjusting slider and the first end of the shaping round pressing slider are slidably connected up and down through a transmission guiding inclined protrusion and a transmission guiding inclined groove. The transmission guiding inclined protrusion is embedded in the transmission guiding inclined groove and is in transmission cooperation with the inclined surface of the transmission guiding inclined groove. The second end of the shaping round pressing slider is provided with a pressing arc surface. The adjusting fixed block is arranged on the shaping round pressing slider or the shaping oil cylinder and is located above the adjusting slider. The first adjusting bolt passes downward through the adjusting fixed block and is threadedly connected to the adjusting slider. The second adjusting bolt passes downward through the adjusting fixed block and abuts against the adjusting slider. The present invention can make the adjusting slider slide up and down by rotating the first adjusting bolt forward or backward. Since the front end of the adjusting slider and the first end of the shaping round pressing slider are in transmission cooperation through the transmission guiding inclined protrusion and the inclined surface of the transmission guiding inclined groove, when the adjusting slider moves up and down, the adjusting slider will drive the shaping round pressing slider to move forward or backward a small distance. Therefore, the present invention can finely adjust the stamping stroke of the shaping round pressing slider, so as to ensure the roundness of the straight stator core after round pressing. After the stamping stroke of the shaping round pressing slider is adjusted, the worker then rotates the second adjusting bolt to press the adjusting slider downward to fix the stamping stroke of the shaping round pressing slider.

[0017] For example, when the stamping stroke of a certain shaping round pressing slider is too deep, resulting in low roundness of the stator core after welding, the worker can rotate the first adjusting bolt forward and the second adjusting bolt backward. The first adjusting bolt drives the adjusting slider to slide upward, and the second adjusting bolt also slides upward. The adjusting slider drives the shaping round pressing slider to move a small distance outward from the shaping seat.

[0018] When the stamping stroke of a certain shaping round pressing slider is too shallow, resulting in low roundness of the stator core after welding, the worker can rotate the first adjusting bolt backward and the second adjusting bolt forward. The first adjusting bolt drives the adjusting slider to slide downward, the adjusting slider drives the shaping round pressing slider to move a small distance inward from the shaping seat, and the second adjusting bolt also moves downward and presses the adjusting slider. Therefore, the present invention can ensure the roundness of the stator core after welding by finely adjusting the stamping stroke of the shaping round pressing slider.

[0019] Both the transmission guiding inclined protrusion and the transmission guiding inclined groove are in a long shape, and both the transmission guiding inclined protrusion and the transmission guiding inclined groove extend obliquely along the height direction. The transmission guiding inclined groove not only guides the lifting of the transmission guiding inclined protrusion, but also is in transmission cooperation with the inclined surface of the transmission guiding inclined protrusion. The lifting and sliding of the adjusting slider will drive the shaping round pressing slider to slide horizontally forward and backward, so as to realize the adjustment of the stamping stroke of the shaping round pressing slider.

[0020] The front end of the adjusting slider is provided with the transmission guiding inclined groove, and the first end of the shaping and rounding slider is provided with the transmission guiding inclined protrusion. Of course, the transmission guiding inclined protrusion can also be designed at the front end of the adjusting slider, and the transmission guiding inclined groove can be designed at the first end of the shaping and rounding slider, which can also achieve the invention purpose of the present invention.

[0021] The front and rear sides of the transmission guiding inclined protrusion are respectively provided with a first inclined surface and a second inclined surface that are parallel to each other. The front and rear sides of the transmission guiding inclined groove are respectively provided with a third inclined surface and a fourth inclined surface that are parallel to each other. The first inclined surface abuts against the third inclined surface, and the second inclined surface abuts against the fourth inclined surface. When the transmission guiding inclined protrusion rises with the adjusting slider, the second inclined surface of the transmission guiding inclined protrusion pushes the fourth inclined surface of the guiding inclined groove backward, so that the guiding inclined groove and the shaping and rounding slider slide backward. When the transmission guiding inclined protrusion descends with the adjusting slider, the first inclined surface of the transmission guiding inclined protrusion pushes the third inclined surface of the transmission guiding inclined groove forward, so that the transmission guiding inclined groove and the shaping and rounding slider slide forward, thereby realizing the stamping stroke of the micro-adjusting shaping and rounding slider.

[0022] The first end of the shaping and rounding slider is provided with a first T-shaped protrusion, and the front end of the adjusting slider is provided with a first T-shaped groove. The first T-shaped protrusion extends into the first T-shaped groove and is slidably connected to the first T-shaped groove up and down. The two side walls of the first T-shaped protrusion are provided with the transmission guiding inclined grooves, and the two side walls of the first T-shaped groove are provided with the transmission guiding inclined protrusions. Such a design enables the shaping and rounding slider and the adjusting slider to be connected while being able to slide relatively up and down. Moreover, due to the inclined surface transmission cooperation between the transmission guiding inclined groove and the transmission guiding inclined protrusion, the lifting and sliding of the adjusting slider will drive the shaping and rounding slider to slide horizontally forward and backward, thereby realizing the adjustment of the stamping stroke of the shaping and rounding slider.

[0023] The front and rear side walls of the transmission guiding inclined protrusion are respectively the first inclined surface and the second inclined surface, and the front and rear side walls of the transmission guiding inclined groove are respectively the third inclined surface and the fourth inclined surface. The end of the oil cylinder joint is provided with a second T-shaped protrusion, and the rear end of the adjusting slider is provided with a second T-shaped groove. The second T-shaped protrusion extends into the second T-shaped groove and is slidably connected to the second T-shaped groove up and down. Such a design enables the oil cylinder joint and the adjusting slider to be connected while being able to slide relatively up and down.

[0024] The acute angle A between the first inclined surface and the vertical plane D is 0.6° - 0.9°, and the acute angle A is preferably 0.86°.

[0025] The jacking shaping mechanism includes a lifting cylinder, a support frame, a lifting guide seat and an ejector seat, wherein the support frame is arranged at the bottom of the frame, the lifting cylinder is arranged on the support frame, the ejector seat is located above the lifting cylinder, the ejector seat is arranged to slide up and down at the bottom of the shaping seat, the lifting cylinder drives the ejector seat to slide, a plurality of flattening ejectors are arranged at annular intervals on the ejector seat, the top ends of the plurality of flattening ejectors are at the same horizontal height, and the position of the flattening ejectors corresponds to the position of the ejector clearance hole. When the lifting seat rises, the flattening ejector passes upward through the clearance hole.

[0026] The lifting guide seat is slidably arranged on the support frame, and the ejector seat is seated on the lifting guide seat. The lifting guide seat is provided with a guide sleeve, and the guide sleeve is slidably arranged on the support frame. The cylinder rod of the lifting cylinder of the present invention is not connected to the lifting guide seat, and the ejector seat is not connected to the lifting guide seat. The lifting guide seat only plays the role of lifting the ejector seat. Such a design makes it convenient for workers to replace the ejector seat, so as to adapt to stator cores of different sizes and models.

[0027] The bottom of the shaping seat is provided with an ejector lifting guide rod, and the ejector seat is provided with an ejector lifting guide hole corresponding to the ejector lifting guide rod, and the ejector seat is sleeved on the ejector lifting guide rod through the ejector lifting guide hole, and a return spring is sleeved on the ejector lifting guide rod, and the upper end of the return spring abuts against the bottom of the shaping seat, and the lower end of the return spring abuts against the ejector seat, and the ejector lifting guide rod is provided with an anti-slip block below the ejector seat. When the cylinder rod of the jacking cylinder contracts and descends, the jacking cylinder no longer presses the ejector seat, and the return spring restores its deformation, and the return spring pushes the ejector seat downward, and the ejector seat slides downward along the ejector lifting guide rod under the action of the return spring, and the flattened ejector descends accordingly, and is separated from the positioning and giving way groove of the shaping center mold core, and when the ejector seat descends to the anti-slip block, the anti-slip block prevents the ejector seat from continuing to descend, and the ejector seat is thus kept on the ejector lifting guide rod. When the cylinder rod of the lifting cylinder extends upward, the lifting cylinder lifts the ejector seat, the return spring is compressed and deformed by the ejector seat, the ejector seat slides upward along the ejector lifting guide rod, the flattening ejector rises accordingly, and passes upward through the ejector clearance hole, and the flattening ejector is inserted upward into the positioning clearance groove of the shaping center mold core.

[0028] The downward pressure shaping mechanism includes a downward pressure cylinder, a downward pressure lifting seat and a flattening sleeve. The downward pressure lifting seat is arranged on the cylinder rod of the downward pressure cylinder and is located below the downward pressure cylinder. The flattening sleeve is cylindrical. A plurality of reinforcing guide ridges are arranged at annular intervals on the inner side wall of the flattening sleeve. The positions of the reinforcing guide ridges are aligned with the positions of the positioning and giving way grooves. When the flattening sleeve of the present invention is lifted or lowered, the reinforcing guide ridges are inserted into the positioning and giving way grooves and cooperate with the lifting guide of the positioning and giving way grooves. The reinforcing guide ridges and the positioning and giving way grooves guide the flattening sleeve to lift and slide. Therefore, the reinforcing guide ridges of the present invention not only play a role in reinforcing the strength of the flattening sleeve, but also play a role in guiding the lifting and lowering of the flattening sleeve.

[0029] The bottom end surface of the flattening sleeve is in a horizontal plane shape, thereby ensuring that the bottom end surface of the flattening sleeve can press all places on the same horizontal plane of the top of the straight stator core to be horizontal and flush.

[0030] The outer side wall of the bottom end of the flattening sleeve is in a necked shape so that the bottom end of the flattening sleeve can extend into the straight stator core, and the flattening sleeve will not interfere with the straight stator core.

[0031] The frame is provided with a detection photoelectric switch for detecting whether there is a straight stator core on the shaping seat. When the detection photoelectric switch detects that there is a straight stator core on the shaping center mold core, the detection photoelectric switch will send a "material" signal to the controller of the whole machine. When the detection photoelectric switch detects that there is a straight stator core on the shaping center mold core, the detection photoelectric switch will send a "no material" signal to the controller of the whole machine.

[0032] The beneficial effects of the present invention are as follows:

[0033] (I) The present invention first pre-sets the straight stator core on the shaping center mold core, and then a plurality of rounding shaping components are used to press the straight stator core in sequence. The plurality of rounding shaping components press the straight stator core into a circular ring shape, and make the two ends of the opening of the straight stator core abut against each other, thereby ensuring the roundness of the straight stator core. Then, the upper end face and the lower end face of the inner circle of the straight stator core are pressed up and down by the top pressing shaping mechanism and the bottom pressing shaping mechanism. The top pressing shaping mechanism presses the top of the straight stator core to be flush with each other at the same horizontal plane, and the bottom pressing shaping mechanism presses the bottom of the straight stator core to be flush with each other at the same horizontal plane. After that, the welding robot is used for welding, and finally it is ensured that the roundness and verticality of the stator core after welding meet the requirements and the product quality is qualified.

[0034] (2) Additionally, in the present invention, through the top pressing and shaping mechanism and the bottom pressing and shaping mechanism, the upper end face and the lower end face of the inner circle of the straight stator core are pressed up and down together. The inner circle of the core is the metal part of the straight stator core, which is not easily damaged or broken. If there are situations such as vertical displacement or inclination in some positions of the straight stator core, that is, the positions at the top of the straight stator core are not on the same horizontal plane or the positions at the bottom are not on the same horizontal plane (not level), the pressing flat thimble and the pressing flat sleeve will press the uneven positions on the straight stator core to be level, so that the positions on the same horizontal plane at the top of the straight stator core are kept level, and the positions on the same horizontal plane at the bottom are kept level. Finally, the heights of all parts of the stator core after welding are made consistent, ensuring the perpendicularity of the stator core.

[0035] (3) Moreover, in the present invention, by rotating the first adjusting bolt forward or backward, the adjusting slider can slide up and down. Since the front end of the adjusting slider and the first end of the shaping and pressing round slider are in transmission cooperation through the transmission guiding inclined protrusion and the transmission guiding inclined groove slope, when the adjusting slider moves up and down, the adjusting slider will drive the shaping and pressing round slider to move forward or backward a small distance. Therefore, the present invention can finely adjust the stamping stroke of the shaping and pressing round slider, thus ensuring the roundness of the straight stator core after pressing round.

[0036] (4) In addition, after the stamping stroke of the shaping and pressing round slider is adjusted, the worker then rotates the second adjusting bolt to press the adjusting slider downward so that the adjusting slider no longer slides up and down, thereby fixing the stamping stroke of the shaping and pressing round slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of the circular shaping die for the straight stator core of the present invention.

[0038] Figure 2 It is Figure 1 a schematic structural diagram from another angle of

[0039] Figure 3 It is a schematic structural diagram of the present invention in the state of pressing round.

[0040] Figure 4 It is Figure 1 a top view of

[0041] Figure 5 It is Figure 4 a sectional view taken along line A - A in

[0042] Figure 6 It is Figure 5 a sectional structural schematic diagram in the state of pressing round.

[0043] Figure 7 It is Figure 5 an enlarged view of part A in

[0044] Figure 8 is Figure 6 An enlarged view of part B in

[0045] Figure 9 Schematic diagram of the connection structure between the round pressing and shaping mechanism and the shaping seat of the present invention.

[0046] Figure 10 is Figure 9 Schematic diagram of the structure from another angle of

[0047] Figure 11 Schematic diagram of the structure of the shaping seat of the present invention.

[0048] Figure 12 is Figure 10 Schematic diagram of the structure from another angle of

[0049] Figure 13 Schematic diagram of the structure of the round pressing and shaping assembly of the present invention.

[0050] Figure 14 is Figure 13 Schematic diagram of the structure from another angle of

[0051] Figure 15 is Figure 13 Top view of

[0052] Figure 16 Exploded schematic diagram of the round pressing and shaping assembly of the present invention.

[0053] Figure 17 is Figure 15 Cross-sectional view taken along line B - B in

[0054] Figure 18 is Figure 15 Cross-sectional view taken along line C - C in

[0055] Figure 19 Schematic diagram of the structure of the top pressing and shaping mechanism of the present invention.

[0056] Figure 20 is Figure 19 Schematic diagram of the structure from another angle of

[0057] Figure 21 Schematic diagram of the structure of the downward pressing and shaping mechanism of the present invention.

[0058] Figure 22 is Figure 21 Schematic diagram of the structure from another angle of

[0059] Figure 23 is Figure 22 An enlarged view of part C in

[0060] Figure 24It is a schematic structural diagram of the straight stator core produced by the present invention.

[0061] Figure 25 It is a structural schematic diagram of the shaping center mold core of the present invention.

[0062] Figure 26 It is a schematic structural diagram of the straight stator core (copper wire omitted) processed by the present invention. DETAILED DESCRIPTION

[0063] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0064] Embodiment 1, as Figures 1 to 26 As shown, a rounding mold for a straight stator core includes a frame 1, a controller (not shown in the figure), a flattening and shaping device 40, and a rounding and shaping mechanism 2.

[0065] The rounding and shaping mechanism 2 includes a plurality of rounding and shaping components 23, which are arranged in an annular manner on the shaping seat 20, and are used to press the straight stator core on the shaping seat 20 into a circular ring shape and make the two ends of the straight stator core 5 abut against each other.

[0066] The flattening and shaping device 40 is arranged on the frame 1, and is used to press the straight stator core 5 up and down, so that each position of the same horizontal plane at the top of the straight stator core 5 is kept flush and each position of the same horizontal plane at the bottom is kept flush.

[0067] As a more specific technical solution of the present invention.

[0068] The flattening shaping device 40 includes a shaping seat 20, a downward pressing shaping mechanism 3 and a top pressing shaping mechanism 4. The shaping seat 20 is arranged on the frame 1 and is used to position and shape the pre-bent straight stator core 5. The downward pressing shaping mechanism 3 is used to press down the upper end surface of the inner circle 51 of the straight stator core 5. The top pressing shaping mechanism 4 is arranged on the frame 1 and is used to press upward the lower end surface of the inner circle 51 of the straight stator core 5.

[0069] The shaping seat 20 is provided with a shaping center mold core 21, a center seat 210 and a shaping outer guide seat 24, the shaping outer guide seat 24 is annular, the shaping center mold core 21 is cylindrical, the shaping center mold core 21 is arranged on the center seat 210, the center seat 210 is arranged in the shaping outer guide seat 24, the shaping outer guide seat 24 is located on the outside of the shaping center mold core 21, the shaping center mold core 21 and the shaping outer guide seat 24 are concentrically arranged, and a plurality of positioning and giving way grooves 211 are arranged at annular intervals on the outer side wall of the shaping center mold core 21, and a plurality of ejector pin giving way holes 28 are arranged at annular intervals at the positions corresponding to the plurality of positioning and giving way grooves 211 on the shaping seat 20.

[0070] A plurality of shaping guide rails 27 are arranged at annular intervals on the shaping outer guide seat 24, and the plurality of rounding shaping components 23 are distributed on the plurality of shaping guide rails 27. The plurality of shaping guide rails 27 guide the shaping and rounding sliders of the plurality of rounding shaping components 23 to slide along the radial direction of the shaping seat.

[0071] A positioning block 29 is provided on the outer wall of the shaping center mold core 21, and a vertical stator positioning protrusion 290 is provided on the positioning block 29. When the pre-bent straight stator core is sleeved on the shaping center mold core, the stator positioning protrusion is inserted into the gap 52 on the core circle of the straight stator core, and the straight stator core can no longer rotate, thereby realizing the positioning of the straight stator core.

[0072] A limit block 26 is provided on the outer side wall of the shaping outer guide seat 24 .

[0073] The positioning clearance groove 211 is in the shape of a vertical strip, and plays a role of clearance and guidance. The positioning clearance groove guides the flattening ejector pin and the flattening sleeve to slide up and down, and also plays a role in avoiding the flattening ejector pin from pressing on the inner circle of the straight stator core.

[0074] The rounding shaping assembly 23 includes a shaping cylinder 230, a shaping rounding slider 231, an adjusting slider 233, an adjusting fixed block 236, a first adjusting bolt 235 and a second adjusting bolt 234. The rear end of the adjusting slider 233 is slidably connected to the cylinder joint 232 of the shaping cylinder 230. The front end of the adjusting slider 233 is slidably connected to the first end of the shaping rounding slider 231 through a transmission guide inclined protrusion 237 and a transmission guide inclined groove 238. The transmission guide inclined protrusion 237 is embedded in the transmission guide inclined groove 238 and Cooperating with the inclined transmission of the transmission guide bevel groove 238, the shaping and pressing rounding slider 231 is horizontally slidably set on the shaping guide rail 27, and the second end of the shaping and pressing rounding slider 231 is provided with a pressing arc surface 2317. The adjusting fixed block 236 is arranged on the shaping and pressing rounding slider 231 and is located above the adjusting slider 233. The first adjusting bolt 235 passes downward through the adjusting fixed block 236 and is threadedly connected with the screw hole 2318 on the adjusting slider 233. The second adjusting bolt 234 passes downward through the adjusting fixed block 236 and abuts against the adjusting slider 233.

[0075] The transmission guiding inclined bump 237 and the transmission guiding inclined groove 238 are both in a long shape, and the transmission guiding inclined bump 237 and the transmission guiding inclined groove 238 both extend obliquely along the height direction. The transmission guiding inclined groove 238 not only guides the lifting of the transmission guiding inclined bump 237, but also is in transmission cooperation with the inclined surface of the transmission guiding inclined bump 237. Adjusting the lifting and sliding of the slider 233 will drive the shaping and pressing round slider 231 to slide horizontally back and forth, so as to realize the adjustment of the stamping stroke of the shaping and pressing round slider. When the transmission guiding inclined bump rises with the adjusting slider, the transmission guiding inclined bump drives the transmission guiding inclined groove and the shaping and pressing round slider to slide backward. When the transmission guiding inclined bump descends with the adjusting slider, the transmission guiding inclined bump drives the transmission guiding inclined groove and the shaping and pressing round slider to slide forward, so as to realize the fine adjustment of the stamping stroke of the shaping and pressing round slider.

[0076] The front end of the adjusting slider is provided with the transmission guiding inclined groove 238, and the first end of the shaping and pressing round slider is provided with the transmission guiding inclined bump 237. Of course, the transmission guiding inclined bump 237 can also be designed at the front end of the adjusting slider, and the transmission guiding inclined groove 238 can be designed at the first end of the shaping and pressing round slider, which can also achieve the invention purpose of the present invention.

[0077] The front and rear sides of the transmission guiding inclined bump 237 are respectively provided with parallel first inclined surfaces 2311 and second inclined surfaces 2312, and the front and rear sides of the transmission guiding inclined groove 238 are respectively provided with parallel third inclined surfaces 2313 and fourth inclined surfaces 2314. The first inclined surface 2311 abuts against the third inclined surface 2313, and the second inclined surface 2312 abuts against the fourth inclined surface 2314. When the transmission guiding inclined bump rises with the adjusting slider, the second inclined surface of the transmission guiding inclined bump pushes the fourth inclined surface of the guiding inclined groove backward, so that the guiding inclined groove and the shaping and pressing round slider slide backward. When the transmission guiding inclined bump descends with the adjusting slider, the first inclined surface of the transmission guiding inclined bump pushes the third inclined surface of the transmission guiding inclined groove forward, so that the transmission guiding inclined groove and the shaping and pressing round slider slide forward, so as to realize the fine adjustment of the stamping stroke of the shaping and pressing round slider.

[0078] The first end of the shaping and rounding slider 231 is provided with a first T-shaped protrusion 2315. The front end of the adjusting slider is provided with a first T-shaped groove 2316. The first T-shaped protrusion 2315 extends into the first T-shaped groove 2316 and is slidably connected to the first T-shaped groove 2316 up and down. The two side walls of the first T-shaped protrusion 2315 are provided with the transmission guiding inclined grooves 238, and the two side walls of the first T-shaped groove 2316 are provided with the transmission guiding inclined protrusions 237. With such a design, while the shaping and rounding slider 231 and the adjusting slider are connected, the shaping and rounding slider and the adjusting slider can slide relative to each other up and down. Moreover, due to the inclined surface transmission cooperation between the transmission guiding inclined groove 238 and the transmission guiding inclined protrusion 237, the lifting and sliding of the adjusting slider will drive the shaping and rounding slider to slide horizontally back and forth, so as to realize the adjustment of the stamping stroke of the shaping and rounding slider.

[0079] The front and rear side walls of the transmission guiding inclined protrusion 237 are respectively the first inclined surface 2311 and the second inclined surface 2312, and the front and rear side walls of the transmission guiding inclined groove 238 are respectively the third inclined surface 2313 and the fourth inclined surface 2314.

[0080] The end of the oil cylinder joint 232 is provided with a second T-shaped protrusion 2310. The rear end of the adjusting slider is provided with a second T-shaped groove 239. The second T-shaped protrusion 2310 extends into the first T-shaped groove 239 and is slidably connected to the second T-shaped groove 239 up and down. With such a design, while the oil cylinder joint and the adjusting slider are connected, the oil cylinder joint 232 and the adjusting slider can slide relative to each other up and down.

[0081] The acute angle A between the first inclined surface 2311 and the vertical plane D is 0.6° - 0.9°, and the acute angle A is preferably 0.86°.

[0082] The top pressing and shaping mechanism 4 includes a lifting cylinder 411, a support frame 45, a lifting guiding seat 41 and a thimble seat 43. The support frame 45 is arranged at the bottom of the frame 1. The lifting cylinder 411 is arranged on the support frame 45. The thimble seat 43 is located above the lifting cylinder 411. The thimble seat 43 is slidably arranged up and down at the bottom of the shaping seat. The lifting cylinder 411 drives the thimble seat 43 to slide. A plurality of pressing thimbles 44 are annularly and spacedly arranged on the thimble seat 43. The horizontal heights of the tops of the plurality of pressing thimbles 44 are the same. The positions of the pressing thimbles correspond to the positions of the thimble relief holes 28.

[0083] The lifting guide seat 41 is slidably arranged on the support frame 45, and the ejector seat 43 is seated on the lifting guide seat. The lifting guide seat is provided with a guide sleeve 46, and the guide sleeve 46 is slidably arranged on the support frame 45. The cylinder rod of the lifting cylinder is provided with a lifting block 417, and the lifting block 417 is against the bottom surface of the lifting guide seat. The cylinder rod of the lifting cylinder of the present invention is not connected to the lifting guide seat, and the ejector seat is not connected to the lifting guide seat. The lifting guide seat only plays the role of lifting the ejector seat. Such a design makes it convenient for workers to replace the ejector seat, so as to adapt to stator cores of different sizes and models.

[0084] A pin lifting guide rod 410 is provided at the bottom of the shaping seat 20, and a pin lifting guide hole 49 is provided on the pin seat 43 corresponding to the pin lifting guide rod 410. The pin seat 43 is sleeved on the pin lifting guide rod 410 through the pin lifting guide hole 49. A reset spring 47 is sleeved on the pin lifting guide rod 410. The upper end of the reset spring 47 abuts against the bottom of the shaping seat, and the lower end of the reset spring 47 abuts against the pin seat 43. The pin lifting guide rod 410 is provided with an anti-slip block 48 below the pin seat 43. When the cylinder rod of the lifting cylinder contracts and descends, the lifting cylinder no longer presses the ejector seat, the reset spring recovers its deformation, and the reset spring pushes the ejector seat downward. Under the action of the reset spring, the ejector seat slides downward along the ejector lifting guide rod, and the flattening ejector falls accordingly and leaves the positioning clearance groove of the shaping center mold core. When the ejector seat falls onto the anti-slip block, the anti-slip block prevents the ejector seat from continuing to fall, and the ejector seat is thus kept on the ejector lifting guide rod. When the cylinder rod of the lifting cylinder extends upward, the lifting cylinder lifts the ejector seat, the reset spring is compressed and deformed by the ejector seat, and the ejector seat slides upward along the ejector lifting guide rod, and the flattening ejector rises accordingly and passes through the ejector clearance hole upward, and the flattening ejector is inserted upward into the positioning clearance groove of the shaping center mold core.

[0085] The downward pressure shaping mechanism 3 includes a fixed seat 38, a downward pressure cylinder 31, a downward pressure lifting seat 32 and a flattening sleeve 33. The downward pressure cylinder 31 is arranged on the fixed seat 38. The downward pressure lifting seat 32 is arranged on the downward pressure cylinder rod 36 of the downward pressure cylinder 31 and is located below the downward pressure cylinder 31. A downward pressure guide sleeve 37 is arranged on the fixed seat 38 corresponding to the downward pressure cylinder rod 36. The flattening sleeve 33 is cylindrical. A plurality of reinforcing guide ridges 35 are arranged at annular intervals on the inner side wall of the flattening sleeve 33. The position of the reinforcing guide ridges 35 is aligned with the position of the positioning and giving way groove 211. A downward pressure ring 34 is arranged at the bottom of the flattening sleeve 33. When the flattening sleeve of the present invention is lifted or lowered, the reinforcing guide ridges are inserted into the positioning and giving way grooves and cooperate with the lifting guide of the positioning and giving way grooves. The reinforcing guide ridges and the positioning and giving way grooves guide the flattening sleeve to lift and slide. Therefore, the reinforcing guide convex strip of the present invention not only plays a role in reinforcing the strength of the flattening sleeve, but also plays a role in guiding the flattening sleeve to rise and fall.

[0086] The bottom end surface of the lower pressing ring 34 is in a horizontal plane shape, so as to ensure that the bottom end surface of the flattening sleeve can press all positions of the top of the straight stator core on the same horizontal plane to be horizontal and flush.

[0087] The outer side wall of the bottom end of the flattening sleeve 33 is in a necked shape so that the bottom end of the flattening sleeve can extend into the straight stator core, and the flattening sleeve will not interfere with the straight stator core.

[0088] The frame 1 is provided with a detection photoelectric switch 10 for detecting whether there is a straight stator core 5 on the shaping seat 20. When the detection photoelectric switch detects that there is a straight stator core on the shaping center mold core, the detection photoelectric switch will send a "material" signal to the controller of the whole machine. When the detection photoelectric switch detects that there is a straight stator core on the shaping center mold core, the detection photoelectric switch will send a "no material" signal to the controller of the whole machine, and the controller will control the next step.

[0089] The working principle of the present invention is:

[0090] Before being conveyed to the present invention for circular shaping, the straight stator core 5 has been pre-bent into a ring with an opening, and then a worker or a robot puts the ring-shaped straight stator core 5 on the shaping center mold core 21 of the shaping seat 20, so that the straight stator core 5 surrounds the shaping center mold core 21.

[0091] Then, the two rounding shaping assemblies 23 opposite to the opening of the straight stator core 5 are started at the same time, and the two shaping cylinders 230 drive their respective rounding shaping sliders 231 to slide toward the shaping center mold core 21 at the same time, and the rounding arc surfaces 2317 of the two rounding shaping sliders 231 simultaneously press the outer wall of the straight stator core 5 on the shaping center mold core 21, and then the multiple rounding shaping assemblies 23 on one side of the opening of the straight stator core 5 are started one by one in the clockwise direction. At the same time, the multiple rounding shaping assemblies 23 on the other side of the opening of the straight stator core 5 are also started one by one in the counterclockwise direction, and the opening of the straight stator core 5 The two rounding shaping assemblies 23 opposite to each other on both sides are started synchronously, and the rounding arc surfaces 2317 of the multiple shaping rounding sliders 231 press the outer side wall of the straight stator core 5 one by one until the two rounding shaping assemblies 23 opposite to the opening of the straight stator core 5 are finally started, and press the two ends of the straight stator core 5 inward, and make the two ends of the straight stator core 5 abut against each other, and the opening of the straight stator core 5 is closed. At this point, the shaping rounding sliders of all the rounding shaping assemblies 23 press the outer side wall of the straight stator core 5, and the inner side wall of the inner circle of the straight stator core 5 is attached to the outer side wall of the shaping center mold core 21.

[0092] Then the downward shaping mechanism 3 is started, the downward shaping cylinder 31 drives the flattening sleeve 33 to descend, the flattening sleeve 33 gradually descends, and is sleeved on the outer wall of the shaping center mold core 21 until the bottom end surface of the flattening sleeve 33 abuts against the upper end surface of the inner circle 51 of the core, and then the top shaping mechanism is started, the lifting cylinder 411 pushes the lifting guide seat 41 to slide upward, the lifting guide seat 41 slides upward along the support frame, the lifting guide seat 41 drives the ejector seat 43 to rise, and the ejector seat 43 moves upward under the guidance of the ejector lifting guide rod 410. The plurality of flattening ejector pins 44 simultaneously pass through the plurality of ejector pin clearance holes 28 of the shaping seat and are inserted into the plurality of positioning clearance grooves 211 on the side wall of the shaping center mold core 21. The plurality of flattening ejector pins 44 simultaneously press upward the lower end surface of the inner circle 51 of the straight stator core 5. The plurality of flattening ejector pins 44, the straight stator core 5 and the flattening sleeve 33 stop rising. The plurality of flattening ejector pins 44 and the flattening sleeve 33 respectively press the lower end surface and the upper end surface of the inner circle 51 of the straight stator core 5, thereby achieving upper and lower flattening. If part of the top or bottom of the straight stator core 5 is misaligned, tilted, or uneven, that is, all parts of the same horizontal plane at the top of the straight stator core 5 or all parts of the same horizontal plane at the bottom are not on the same horizontal plane (not flush), the flattening pins 44 at the corresponding positions will press the uneven positions on the straight stator core 5 to be flush, so that all parts of the same horizontal plane at the top of the straight stator core 5 and all parts of the same horizontal plane at the bottom remain flush.

[0093] Then, an external welding robot welds the two ends of the annular straight stator core 5. After welding, the roundness and perpendicularity of the circular stator core 6 meet the requirements, and the product quality of the straight stator core is excellent. After welding the stator core 6, the pressing cylinder 31 drives the flattening sleeve 33 to rise, and all the shaping and rounding sliders 231 retract to their original positions. Then, the jacking cylinder 411 pushes the jacking guide seat 41 upward again. The jacking guide seat 41 drives the thimble seat 43 upward, and multiple pressing thimbles 44 continue to jack upward. The multiple pressing thimbles 44 push the welded stator core 6 out of the shaping center die core, and then a worker or a manipulator grabs the welded stator core 6 and takes it away.

[0094] In addition, when a worker finds that the roundness of the welded stator core 6 is not high due to the excessive stamping stroke of a certain shaping and rounding slider 231, the worker can rotate the first adjusting bolt 235 forward and the second adjusting bolt 234 backward. The first adjusting bolt 235 drives the adjusting slider 233 to slide upward, and the second adjusting bolt 234 also slides upward. The adjusting slider 233 drives the shaping and rounding slider 231 to move a small distance outward from the shaping seat. After that, the worker rotates the second adjusting bolt 234 forward again. The second adjusting bolt 234 moves downward and presses the adjusting slider 233 to make the adjusting slider 233 stop moving up and down, and the shaping and rounding slider 231 also stops sliding, thereby positioning the shaping and rounding slider 231. At this time, the pressing arc surface 2317 of this shaping and rounding slider 231 and the pressing arc surfaces 2317 of other shaping and rounding sliders 231 are on the same cylindrical surface, so as to ensure the roundness of the straight stator core after welding.

[0095] In addition, when a worker finds that the roundness of the welded stator core 6 is not high due to the insufficient stamping stroke of a certain shaping and rounding slider 231, the worker can rotate the first adjusting bolt 235 backward and the second adjusting bolt 234 forward. The first adjusting bolt 235 drives the adjusting slider 233 to slide downward. The adjusting slider 233 drives the shaping and rounding slider 231 to move a small distance inward from the shaping seat. The second adjusting bolt 234 also moves downward and presses the adjusting slider 233. The adjusting slider 233 stops moving up and down, and the shaping and rounding slider 231 also stops sliding inward from the shaping seat. At this time, the pressing arc surface 2317 of this shaping and rounding slider 231 and the pressing arc surfaces 2317 of other shaping and rounding sliders 231 are on the same cylindrical surface, so as to ensure the roundness of the straight stator core after welding. Therefore, the present invention can ensure the roundness of the stator core 5 after welding by finely adjusting the stamping stroke of the shaping and rounding slider 231.

Claims

1. A circular shaping die for a straight stator core, comprising a shaping base, a top pressing and shaping mechanism, a bottom pressing and shaping mechanism, and a circular pressing and shaping mechanism, characterized in that, The shaping seat is used to position and shape the straight stator core; The downward pressing shaping mechanism is used to press downward the upper end surface of the inner circle of the straight stator core; The pressing and shaping mechanism is used to press upward the lower end surface of the inner circle of the straight stator core; The rounding and shaping mechanism comprises a plurality of rounding and shaping components, which are arranged on the shaping seat in an annular manner and are used to press the straight stator core on the shaping seat into a circular ring shape and make the two ends of the straight stator core abut against each other; The shaping seat is provided with a shaping center mold core and a shaping outer guide seat, the shaping outer guide seat is annular, the shaping center mold core is cylindrical, the shaping center mold core and the shaping outer guide seat are concentrically arranged, the shaping outer guide seat is located on the outer side of the shaping center mold core, a plurality of positioning and giving way grooves are arranged at annular intervals on the outer side wall of the shaping center mold core, and a plurality of ejector pin giving way holes are arranged at annular intervals at positions corresponding to the plurality of positioning and giving way grooves on the shaping seat; The rounding shaping assembly includes a shaping cylinder, a shaping rounding sliding block, an adjusting sliding block, an adjusting fixing block, a first adjusting bolt and a second adjusting bolt. The rear end of the adjusting sliding block is slidably connected to the cylinder joint of the shaping cylinder up and down. The front end of the adjusting sliding block is slidably connected to the first end of the shaping rounding sliding block up and down through a transmission guide inclined protrusion and a transmission guide inclined groove. The transmission guide inclined protrusion is embedded in the transmission guide inclined groove and cooperates with the transmission guide inclined groove inclined surface. The second end of the shaping rounding sliding block is provided with a shaping rounding surface. The adjusting fixing block is arranged on the shaping rounding sliding block or the shaping cylinder and is located above the adjusting sliding block. The first adjusting bolt passes downward through the adjusting fixing block and is threadedly connected to the adjusting sliding block. The second adjusting bolt passes downward through the adjusting fixing block and rests on the adjusting sliding block.

2. The circular shaping die for a straight stator core according to claim 1, characterized in that, A positioning block is provided on the outer side wall of the shaping center mold core, and a vertical stator positioning protrusion is provided on the positioning block.

3. The circular shaping die for a straight stator core according to claim 1, characterized in that, The front end of the adjusting slider is provided with the transmission guide inclined groove, and the first end of the shaping and rounding slider is provided with the transmission guide inclined protrusion.

4. The circular shaping die for a straight stator core according to claim 2, characterized in that, A first T-shaped protrusion is provided at the first end of the shaping and pressing slider, a first T-shaped slot is provided at the front end of the adjusting slider, the first T-shaped protrusion extends into the first T-shaped slot and is slidably connected with the first T-shaped slot up and down, the left and right side walls of the first T-shaped protrusion are provided with the transmission guide inclined slot, and the left and right side walls of the first T-shaped slot are provided with the transmission guide inclined protrusions.

5. The circular shaping die for a straight stator core according to claim 1, characterized in that, The jacking and shaping mechanism includes a lifting cylinder, a support frame and an ejector seat, the support frame is arranged at the bottom of the frame, the lifting cylinder is arranged on the support frame, the ejector seat is located above the lifting cylinder, the ejector seat is slidably arranged at the bottom of the shaping seat, the lifting cylinder drives the ejector seat to slide, and a plurality of flattening ejectors are arranged at annular intervals on the ejector seat, the top ends of the plurality of flattening ejectors are at the same horizontal height, and the position of the flattening ejector corresponds to the position of the ejector clearance hole.

6. The circular shaping die for a straight stator core according to claim 5, characterized in that, A pin lifting guide rod is provided at the bottom of the shaping seat, a pin lifting guide hole is provided on the pin seat corresponding to the pin lifting guide rod, the pin seat is sleeved on the pin lifting guide rod through the pin lifting guide hole, a return spring is sleeved on the pin lifting guide rod, the upper end of the return spring abuts against the bottom of the shaping seat, the lower end of the return spring abuts against the pin seat, and an anti-slip block is provided on the pin lifting guide rod below the pin seat.

7. The circular shaping die for a straight stator core according to claim 1, characterized in that, The downward pressure shaping mechanism comprises a downward pressure cylinder, a downward pressure lifting seat and a flattening sleeve. The downward pressure lifting seat is arranged on the cylinder rod of the downward pressure cylinder and is located below the downward pressure cylinder. The flattening sleeve is cylindrical.

8. The circular shaping die for a straight stator core according to claim 7, characterized in that, A plurality of reinforcing guide ridges are arranged at annular intervals on the inner side wall of the flattening sleeve, and the positions of the reinforcing guide ridges are aligned with the positions of the positioning and giving way grooves.

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