Motor stator stamping device

Abstract

The invention discloses a motor stator stamping device, and relates to the technical field of stamping, the motor stator stamping device comprises a case, first motors symmetrically distributed along the case are fixedly connected to one side in the case, an eccentric wheel is fixedly connected between output shafts of the symmetrically distributed first motors, and the eccentric wheel is rotatably connected with a connecting frame; two guide rails are fixedly connected into the machine box, a first pressing frame is connected between the two guide rails in a sliding mode, the first pressing frame is fixedly connected with a second pressing frame, the second pressing frame is rotationally connected with the connecting frame, and the second pressing frame is connected with a punching head in a sliding mode. When the punching head is abraded to cause high-frequency vibration, the telescopic frame touches the contact switch to trigger an automatic force unloading mechanism, so that the limiting frame unlocks the punching head, the punching head can slide leftwards to unload force, the situation that defective products are increased due to continuous punching when the punching head is seriously abraded is avoided, and the punching defective rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of stamping, and in particular to a motor stator stamping device. Background Art

[0002] In the motor manufacturing process, the motor stator is one of the key components, and its stamping process directly affects the performance and quality of the motor. Especially in mass production, efficient and accurate stamping equipment is crucial to improving production efficiency and product quality.

[0003] At present, the common motor stator stamping devices on the market mainly include feeding system, punch head and die, drive system and control system. During the stamping process, as the use time increases, the working surface of the punch head will gradually wear, resulting in pits, scratches or other irregular shapes. These surface defects will cause uneven distribution of punching force, making the impact force and reaction force generated during each punching no longer symmetrical. The gap between the punch head and the die is precisely designed to ensure the best processing effect. When the punch head is worn, this gap will increase, resulting in inconsistent material deformation during the stamping process and adding additional vibration sources. In addition, the wear of the punch head will cause changes in its mass distribution, especially in the case of high-speed reciprocating motion. This asymmetric mass distribution will cause changes in centrifugal force, thereby generating periodic exciting forces. The worn punch head will generate different impact frequencies when contacting the workpiece, especially when there is irregular damage on the surface, the energy and direction of each impact will be different, exacerbating the occurrence of vibration. Frequent vibration will eventually affect the dimensional accuracy and surface quality of the stamped parts. If the problem of punch head wear is not discovered and dealt with in time, continued stamping may result in a large number of defective products, increasing the defective rate and production costs. Summary of the invention

[0004] In order to overcome the technical disadvantage that high-frequency vibration caused by severe wear of the punch head will affect the dimensional accuracy of the punched parts, the present invention provides a motor stator punching device.

[0005] A motor stator stamping device comprises a chassis, a first motor symmetrically distributed along the chassis is fixedly connected to one side inside the chassis, an eccentric wheel is fixedly connected between the symmetrically distributed output shafts of the first motor, the eccentric wheel is rotatably connected to a connecting frame, two guide rails are fixedly connected inside the chassis, a first pressing frame is slidably connected between the two guide rails, the first pressing frame is fixedly connected to a second pressing frame, the second pressing frame is rotatably connected to the connecting frame, the second pressing frame is slidably connected to a punching head, the first pressing frame is slidably connected to at least one limiting frame, the limiting frame is clamped with the punching head, a mold is fixedly connected to the other side inside the chassis, a feed trough is opened on one side of the chassis close to the mold, and a discharge trough is opened on the other side of the chassis close to the mold, and the first pressing frame is provided with an automatic unloading component for automatically unlocking the punching head, thereby unloading the force of the punching head.

[0006] As an improvement of the above-mentioned scheme, the automatic unloading assembly also includes a rotating disk for releasing the limit of the punching head by the limit frame, the rotating disk is rotatably connected to the second pressing frame, the first pressing frame is fixedly connected to a cylinder, the cylinder has a switch, the telescopic rod of the cylinder is rotatably connected to the rotating disk, the first pressing frame is fixedly connected to a fixed tube, the fixed tube is slidably connected to the telescopic frame, a first spring is fixed between the fixed tube and the telescopic frame, the fixed tube is fixedly connected to a contact switch, the telescopic frame moves and contacts with the contact switch, and the contact switch is electrically connected to the cylinder through a control module.

[0007] As an improvement of the above solution, the rotating disk is provided with an arc groove symmetrical along the center of the rotating disk, and the rotating disk is slidably connected to the limiting frame through the arc groove.

[0008] As an improvement on the above scheme, it also includes a first hydraulic cylinder, the first hydraulic cylinder is fixedly connected to the second pressing frame, the punching head is fixedly connected to the piston rod of the first hydraulic cylinder, the first hydraulic cylinder is connected to a hose, the second hydraulic cylinder is fixedly connected to the chassis, the second hydraulic cylinder is connected to the hose, a pushing frame is slidably connected to the side of the chassis close to the second hydraulic cylinder, the pushing frame is fixedly connected to the piston rod of the second hydraulic cylinder, at least one roller is rotatably connected to the chassis and the pushing frame, the roller is fixedly connected to a gear, adjacent gears are meshed with each other, the pushing frame is fixedly connected to a second motor, and the output shaft of the second motor is fixedly connected to the roller on the pushing frame.

[0009] As an improvement of the above solution, hydraulic oil is stored in the first hydraulic cylinder.

[0010] As an improvement of the above scheme, it also includes a third pressing frame, which is rotatably connected to a side of the chassis close to the feed trough, a rotating frame is fixedly connected to one side of the third pressing frame, the rotating frame is movably connected to the pushing frame, the third pressing frame is rotatably connected to a first locking frame, the first locking frame is slidably connected to a second locking frame, and a second spring is fixedly connected between the first locking frame and the second locking frame.

[0011] As an improvement of the above solution, a movable groove is formed on a side of the pushing frame close to the rotating frame, and the pushing frame is movably connected to the rotating frame through the movable groove.

[0012] As an improvement of the above scheme, a fourth pressing frame is further included, which is slidably connected to the first pressing frame, the punch head is located in the fourth pressing frame, and at least two third springs are fixedly connected between the first pressing frame and the fourth pressing frame.

[0013] Beneficial effect: When the punch head is worn and causes high-frequency vibration, the telescopic frame touches the contact switch to trigger the automatic force unloading mechanism, so that the limit frame releases the lock on the punch head and the punch head can slide to the left to unload the force, avoiding the increase of defective products caused by continued stamping when the punch head is severely worn, and reducing the stamping defective rate.

[0014] The present invention realizes intermittent automatic and stable feeding of the silicon steel strip by driving the roller through the second motor, thereby ensuring the accurate position of the silicon steel strip before each stamping and improving the stamping accuracy.

[0015] The present invention uses a hydraulic linkage design between the first hydraulic cylinder and the second hydraulic cylinder to suspend the feeding of the silicon steel strip when the punching head is severely worn, thereby reducing unnecessary mechanical wear.

[0016] The present invention, through the design of the fourth pressing frame and the third spring, first presses the area of ​​the silicon steel strip to be punched before the punch head punches to the right, effectively preventing the silicon steel strip from being deformed due to the punching pressure, and also presses the silicon steel strip through the second locking frame when the punch head returns to the left, preventing it from bending as the punch head moves, thereby ensuring the quality of the stamped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a partial three-dimensional structural cross-sectional view of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the eccentric wheel, connecting frame, guide rail and other components of the present invention.

[0020] Figure 4It is a three-dimensional structural schematic diagram of the first pressing frame, the second pressing frame, the punching head and other components of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of components such as the chassis, rotating disk and fixed tube of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the second pressing frame, rotating disk and cylinder of the present invention.

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the telescopic frame, the first spring, the contact switch and other components of the present invention.

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the first pressing frame, the second hydraulic cylinder and the pushing frame of the present invention.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the roller, gear, second motor and other components of the present invention.

[0026] Fig.10 It is a three-dimensional structural schematic diagram of the third pressing frame and the first locking frame and other components of the present invention.

[0027] Fig.11 It is a schematic diagram of the three-dimensional structure of the pushing frame, the third pressing frame and the second locking frame of the present invention.

[0028] Fig.12 It is a three-dimensional structural schematic diagram of the first locking frame, the second locking frame and other components of the present invention.

[0029] Fig.13 It is a three-dimensional structural schematic diagram of the first pressing frame and the fourth pressing frame and other components of the present invention.

[0030] Names of the numbers in the figure: 101, chassis, 102, first motor, 103, eccentric wheel, 104, connecting frame, 105, guide rail, 106, first pressing frame, 107, second pressing frame, 108, punching head, 109, limiting frame, 110, mold, 111, feed trough, 112, discharge trough, 201, rotating disk, 202, cylinder, 203, fixed pipe, 204, telescopic frame, 205, first spring, 206, contact switch, 301, first hydraulic cylinder, 302, hose, 303, second hydraulic cylinder, 304, pushing frame, 305, roller, 306, gear, 307, second motor, 401, rotating frame, 402, third pressing frame, 403, first locking frame, 404, second locking frame, 405, second spring, 501, fourth pressing frame, 502, third spring. DETAILED DESCRIPTION

[0031] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0032] Embodiment 1: A motor stator stamping device, such as Figure 1-Figure 4 As shown, the machine comprises a chassis 101, a first motor 102 symmetrically distributed along the front and rear sides of the chassis 101 is fixedly connected to the left side of the chassis 101, an eccentric wheel 103 is fixedly connected between the output shafts of the first motor 102 symmetrically distributed along the front and rear sides, and the eccentric wheel 103 is rotatably connected to a connecting frame 104, two front and rear guide rails 105 are fixedly connected in the middle of the chassis 101, a first pressing frame 106 is slidably connected between the two guide rails 105 along the left and right directions, and a second pressing frame 106 is fixedly connected in the middle of the first pressing frame 106 107, the left end of the second pressing frame 107 is rotatably connected to the right end of the connecting frame 104, a punch head 108 is slidably connected inside the second pressing frame 107, the first pressing frame 106 is slidably connected to two limit frames 109, the limit frames 109 are clamped with the punch head 108, a mold 110 is fixedly connected to the right side of the chassis 101, a longitudinally distributed feed trough 111 is opened on the upper side of the chassis 101 near the mold 110, and a discharge trough 112 is opened on the lower side of the chassis 101 near the mold 110.

[0033] like Figure 5-Figure 7 As shown, it also includes a rotating disk 201 for releasing the limit of the limit frame 109 on the punch head 108, the rotating disk 201 is rotatably connected to the second pressing frame 107, the rotating disk 201 is provided with an arc groove symmetrical along the center of the rotating disk 201, the rotating disk 201 is slidably connected to the limit frame 109 through the arc groove, a cylinder 202 is fixedly connected to the front upper right side of the first pressing frame 106, the cylinder 202 has a switch, the telescopic rod of the cylinder 202 is rotatably connected to the rotating disk 201, the front and rear sides of the first pressing frame 106 are fixedly connected to a fixed tube 203, a telescopic frame 204 is slidably connected in the fixed tube 203 along the left and right directions, a first spring 205 is fixedly connected between the fixed tube 203 and the telescopic frame 204, a contact switch 206 is fixedly connected to the right side of the inside of the fixed tube 203, the telescopic frame 204 moves forward and contacts with the adjacent contact switch 206, and the contact switch 206 is electrically connected to the cylinder 202 through the control module.

[0034] Before using the device to punch the motor stator, first cut the whole roll or sheet of silicon steel sheet into strips suitable for the punching device according to the design requirements, and then insert the silicon steel strips from the feed slot 111 and pass through the discharge slot 112. The silicon steel strips pass between the punch head 108 and the die 110, and then start the first motor 102. The output shaft of the first motor 102 drives the eccentric wheel 103 to rotate. The eccentric wheel 103 pushes and pulls the second pressing frame 107 to move back and forth through the connecting frame 104, thereby driving the first pressing frame 106 to slide back and forth along the guide rail 105. Initially, the first pressing frame 1 06 The punch head 108 is fixed by the limit frame 109, so the first pressing frame 106 drives the punch head 108 to move back and forth left and right through the limit frame 109. When the punch head 108 moves to the right, the punch head 108 cooperates with the mold 110 to act on the silicon steel strip between the two to punch out the motor stator. When the punch head 108 moves to the left, the silicon steel strip is pulled downward by a fixed distance to move out the punched area band and move in the unpunched area band at the same time. This is repeated to punch out multiple stators on a whole silicon steel strip. After stamping is completed, the first motor 102 is closed.

[0035] In the above-mentioned stamping process, when the punch head 108 is worn to a certain extent, causing the whole device to vibrate at a high frequency, the telescopic frame 204 slides left and right relative to the fixed tube 203 at a high frequency, and the first spring 205 stretches and resets adaptively. When the amplitude of the telescopic frame 204 vibrates too large, causing the telescopic frame 204 to contact the contact switch 206, it means that the degree of wear of the punch head 108 exceeds the feasible range, and the telescopic frame 204 triggers the contact switch 206 to send an electrical signal. The control module receives the electrical signal and controls the cylinder 20 2 is contracted, thereby pulling the rotating disk 201 to rotate, and the rotating disk 201 slides along the first pressing frame 106 to the side away from the punching head 108 through the arc groove extrusion limit frame 109 to release the lock of the punching head 108, so that the punching head 108 can slide to the left relative to the second pressing frame 107 when punching the silicon steel strip to the right. In this way, when the punching head 108 is severely worn and causes high-frequency vibration, the force can be automatically and timely unloaded to prevent continued stamping from causing an increase in defective products and reduce the stamping defective rate.

[0036] When the above-mentioned punching head 108 is unable to exert force for punching, turn off the first motor 102, replace the punching head 108, and manually control the automatic switch of the cylinder 202 to extend the telescopic rod of the cylinder 202, thereby pushing the rotating disk 201 to rotate in the opposite direction. The rotating disk 201 pulls the limit frame 109 through the arc groove to slide along the first pressing frame 106 to the side close to the punching head 108 to lock the replaced punching head 108.

[0037] Embodiment 2: Based on embodiment 1, Figure 8-Figure 9As shown, it also includes a first hydraulic cylinder 301, the first hydraulic cylinder 301 is fixedly connected to the second pressing frame 107, hydraulic oil is stored in the first hydraulic cylinder 301, the punch head 108 is fixedly connected to the piston rod of the first hydraulic cylinder 301, the first hydraulic cylinder 301 is connected to a hose 302, a second hydraulic cylinder 303 is fixedly connected to the right part of the chassis 101, the second hydraulic cylinder 303 is connected to the hose 302, a pushing frame 304 is slidably connected to the right side of the chassis 101 along the left and right directions, the pushing frame 304 is fixedly connected to the piston rod of the second hydraulic cylinder 303, the chassis 101 and the pushing frame 304 are rotatably connected to upper and lower rollers 305, the front side of the roller 305 is fixedly connected to a gear 306, adjacent gears 306 are meshed with each other, and upper and lower second motors 307 are fixedly connected to the rear side of the pushing frame 304, and the output shaft of the second motor 307 is fixedly connected to the adjacent rollers 305 on the pushing frame 304.

[0038] When the silicon steel strip passes through the feed trough 111, it passes downward between the two rollers 305. When the punch head 108 moves to the left, the output shaft of the second motor 307 is controlled to drive the roller 305 on the left to rotate. The roller 305 on the left drives the roller 305 on the right to rotate synchronously through the gear 306, thereby automatically feeding the silicon steel strip downward. When the punch head 108 moves to the right, the output shaft of the second motor 307 is controlled to stop rotating. In this way, the effect of intermittent automatic feeding of the silicon steel strip is achieved.

[0039] When the punch head 108 unloads the force and slides to the left relative to the second pressing frame 107, the punch head 108 presses the hydraulic oil in the first hydraulic cylinder 301 into the second hydraulic cylinder 303 through the hose 302. Under the hydraulic action of the hydraulic oil, the push frame 304 slides to the left relative to the second hydraulic cylinder 303, thereby driving the roller 305 on the left to move to the left, so that the roller 305 on the left is separated from the silicon steel strip. At the same time, the roller 305 on the left drives the gear 306 on the left to separate from the gear 306 on the right, thereby suspending the feeding of the silicon steel strip when the punch head 108 is severely worn and causes high-frequency vibration. After the punch head 108 is replaced, the punch head 108 pulls the piston rod of the first hydraulic cylinder 301 to move to the right and reset. Under the action of negative pressure, the push frame 304 moves to the right and resets.

[0040] Embodiment 3: Based on embodiment 2, Figure 10-12 As shown, it also includes a third pressing frame 402, which is rotatably connected to one side of the chassis 101 close to the feed trough 111, the front side of the third pressing frame 402 is fixedly connected to the rotating frame 401, and a movable groove is opened on the upper front side of the pushing frame 304, and the pushing frame 304 is movably connected to the rotating frame 401 through the movable groove, and the middle of the third pressing frame 402 is rotatably connected to the first locking frame 403, and the first locking frame 403 is slidably connected to the second locking frame 404, and a second spring 405 is fixedly connected between the first locking frame 403 and the second locking frame 404.

[0041] When the pushing frame 304 moves to the left, the pushing frame 304 pushes the rotating frame 401 to rotate through the movable groove, and the rotating frame 401 drives the third pressing frame 402 to rotate, thereby driving the second locking frame 404 to swing to the right through the first locking frame 403 until it contacts the left side of the silicon steel strip, and the second locking frame 404 presses the silicon steel strip, and the second spring 405 is adaptively compressed to prevent the silicon steel strip from bending to the left following the punching head 108 when the punching head 108 moves to the left. When the pushing frame 304 moves to the right, the pushing frame 304 pulls the rotating frame 401 to rotate in the opposite direction through the movable groove, and the rotating frame 401 drives the third pressing frame 402 to rotate in the opposite direction, thereby driving the second locking frame 404 to swing to the left through the first locking frame 403 until it disengages from the left side of the silicon steel strip, and the second spring 405 is reset.

[0042] like Fig.13 As shown, a fourth pressing frame 501 is also included. The fourth pressing frame 501 is slidably connected to the first pressing frame 106 . The punch head 108 is located in the fourth pressing frame 501 . Four third springs 502 are fixedly connected between the first pressing frame 106 and the fourth pressing frame 501 .

[0043] When the first pressing frame 106 drives the punching head 108 to punch to the right, the fourth pressing frame 501 and the third spring 502 move to the right accordingly. The fourth pressing frame 501 first presses the area of ​​the silicon steel strip to be punched, and the third spring 502 is adaptively compressed. Then the punching head 108 contacts the silicon steel strip for punching. In this way, the silicon steel strip can be prevented from being deformed by the punching pressure during punching.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A motor stator stamping device, characterized in that: The invention comprises a chassis (101), wherein a first motor (102) symmetrically distributed along the chassis (101) is fixedly connected to one side of the chassis (101), an eccentric wheel (103) is fixedly connected between the output shafts of the symmetrically distributed first motors (102), the eccentric wheel (103) is rotatably connected to a connecting frame (104), two guide rails (105) are fixedly connected inside the chassis (101), a first pressing frame (106) is slidably connected between the two guide rails (105), the first pressing frame (106) is fixedly connected to a second pressing frame (107), the second pressing frame (107) is rotatably connected to the connecting frame (104), and the second pressing frame (107) is rotatably connected to the connecting frame (104). 107) is slidably connected to a punch head (108), the first pressing frame (106) is slidably connected to at least one limiting frame (109), the limiting frame (109) is snap-connected to the punch head (108), the other side of the chassis (101) is fixedly connected to a mold (110), a feeding groove (111) is provided on one side of the chassis (101) close to the mold (110), and a discharging groove (112) is provided on the other side of the chassis (101) close to the mold (110), and the first pressing frame (106) is provided with an automatic unloading component for automatically unlocking the punch head (108) and thereby unloading the force of the punch head (108).

2. A motor stator stamping device as claimed in claim 1, characterized in that: The automatic unloading assembly comprises a rotating disk (201) for releasing the limit of the limit frame (109) on the punch head (108); the rotating disk (201) is rotatably connected to the second pressing frame (107); the first pressing frame (106) is fixedly connected to a cylinder (202); the cylinder (202) has a switch; the telescopic rod of the cylinder (202) is rotatably connected to the rotating disk (201); the first pressing frame (106) is fixedly connected to a fixed tube (203); the fixed tube (203) is slidably connected to a telescopic frame (204); a first spring (205) is fixedly connected between the fixed tube (203) and the telescopic frame (204); the fixed tube (203) is fixedly connected to a contact switch (206); the telescopic frame (204) moves to contact the contact switch (206); the contact switch (206) is electrically connected to the cylinder (202) through a control module.

3. A motor stator stamping device as claimed in claim 2, characterized in that: The rotating disk (201) is provided with an arc-shaped groove symmetrically arranged along the center of the rotating disk (201), and the rotating disk (201) is slidably connected to the limiting frame (109) via the arc-shaped groove.

4. A motor stator stamping device as claimed in claim 3, characterized in that: The machine also comprises a first hydraulic cylinder (301), wherein the first hydraulic cylinder (301) is fixedly connected to the second pressing frame (107), the punching head (108) is fixedly connected to the piston rod of the first hydraulic cylinder (301), the first hydraulic cylinder (301) is connected to a hose (302), a second hydraulic cylinder (303) is fixedly connected to the chassis (101), the second hydraulic cylinder (303) is connected to the hose (302), a pushing frame (304) is slidably connected to a side of the chassis (101) close to the second hydraulic cylinder (303), the pushing frame (304) is fixedly connected to the piston rod of the second hydraulic cylinder (303), the chassis (101) and the pushing frame (304) are both rotatably connected to at least one roller (305), and the roller (305) is fixedly connected to a gear (306), The adjacent gears (306) are meshed with each other, the pushing frame (304) is fixedly connected with a second motor (307), and the output shaft of the second motor (307) is fixedly connected to the roller (305) on the pushing frame (304).

5. A motor stator stamping device as claimed in claim 4, characterized in that: The first hydraulic cylinder (301) stores hydraulic oil.

6. A motor stator stamping device as claimed in claim 5, characterized in that: The invention also includes a third pressing frame (402), wherein the third pressing frame (402) is rotatably connected to a side of the chassis (101) close to the feed trough (111), a rotating frame (401) is fixedly connected to one side of the third pressing frame (402), the rotating frame (401) is movably connected to the pushing frame (304), the third pressing frame (402) is rotatably connected to a first locking frame (403), the first locking frame (403) is slidably connected to a second locking frame (404), and a second spring (405) is fixedly connected between the first locking frame (403) and the second locking frame (404).

7. A motor stator stamping device as claimed in claim 6, characterized in that: A movable groove is formed on one side of the pushing frame (304) close to the rotating frame (401), and the pushing frame (304) is movably connected to the rotating frame (401) via the movable groove.

8. A motor stator stamping device as claimed in claim 7, characterized in that: It also includes a fourth pressing frame (501), the fourth pressing frame (501) is slidably connected to the first pressing frame (106), the punch head (108) is located in the fourth pressing frame (501), and at least two third springs (502) are fixedly connected between the first pressing frame (106) and the fourth pressing frame (501).

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