Motor rotor stamping device and brushless permanent magnet motor stamping method

Abstract

The present invention relates to the field of rotor stamping technology, and specifically to a motor rotor stamping device and a brushless permanent magnet motor stamping method, comprising a workbench; the stamping device also comprises a positioning unit and a pressing unit; a circular groove is vertically penetrated through the workbench, the positioning unit is an annular structure, the positioning unit has a positioning state and a processing state, when the positioning unit is in the positioning state, the positioning unit is a truncated cone structure with a large upper opening and a small lower opening, when the positioning unit is in the processing state, the positioning unit is a cylindrical structure; the pressing unit is arranged above the workbench along the axis of the circular groove. The present invention optimizes the positioning of the rotor end plate, so that after the rotor end plate is positioned, the axis of the rotor end plate is in line with the pressing axis of the pressing unit, and at the same time, the above-mentioned positioning method is used to increase the positioning speed, thereby increasing the output.

Description

Technical Field

[0001] The invention relates to the technical field of rotor stamping, and in particular to a motor rotor stamping device and a stamping method for a brushless permanent magnet motor. Background Art

[0002] The core components of the brushless permanent magnet electrode include the stator and the rotor. The rotor is composed of a rotor end plate, a rotor core, an electromagnetic block, etc. The rotor end plate and the rotor core can be formed by stamping. In the traditional stamping die: when the workpiece is completed by stamping, in order to avoid safety accidents, the operator generally needs to use special tools to take out the completed stamping workpiece, thereby completing the workpiece unloading task. Although the existing technology has replaced the manual loading and unloading process with a robot, the efficiency has not been greatly improved.

[0003] Chinese patent CN217412156U discloses a rotor sheet stamping die, comprising an upper die set and a lower die set, wherein the upper die set and the lower die set are molded together to stamp the rotor sheet; a suction cup assembly for adsorbing the rotor sheet is provided on the upper die set or the lower die set, and the suction cup assembly is connected to a vacuum device for vacuuming by an air circuit; when the die is opened, the suction cup assembly adsorbs the rotor sheet after the stamping process, and the suction cup assembly comprises a vacuum disc and a vacuum tube, and the vacuum disc is connected to the vacuum device by an air circuit of the vacuum tube, and the adsorption surface of the vacuum disc is exposed to the upper pressing surface on the upper die set or the lower pressing surface on the lower die set; when the die is opened, the vacuum disc adsorbs the rotor sheet after the stamping process.

[0004] The above scheme takes out the rotor sheet after mold opening by adsorption when the mold is opened. The rotor sheet is the rotor end plate. However, due to the large number of holes on the rotor end plate, the distribution number of suction cups is limited, the suction force is also limited, and accidental falling is easy to occur. At the same time, the above-mentioned unloading is still carried out by a robot. The positions of loading and unloading are both located below the pressing mechanism, and there is overlap in the working areas, which makes it easy for the pressing mechanism to collide with the robot. In addition, since the rotor end plate is a circular structure, the positioning requirements are high. This is because if the axis of the rotor end plate is not colinear with the pressing axis of the pressing mechanism, the through hole on the rotor end plate will deviate, which will increase the defective rate. The traditional positioning device has a slow positioning speed and low production efficiency. Summary of the invention

[0005] In view of the above problems, a motor rotor stamping device and a brushless permanent magnet motor stamping method are provided. The rotor end plate is pushed into the positioning unit by a pushing device, and is received by a receiving device in the positioning unit. The unprocessed rotor end plate is pushed to the top of the positioning unit. At this time, the positioning unit is in a positioning state. The positioning unit switches from the positioning device to a processing state. The upper opening of the positioning unit gradually shrinks until it has the same diameter as the lower opening, that is, the positioning is completed. The pressing unit descends to stamp the unprocessed rotor end plate. After the stamping is completed, the first linear drive drives the receiving shell to descend to Below the positioning ring, the distance between the receiving shell and the positioning ring in the vertical direction is greater than the thickness of the rotor end plate. The discharging device is started, and the discharging device pushes down the rotor end plate on the receiving shell to complete the unloading. Then the first linear drive drives the receiving shell to reset, thereby optimizing the positioning of the rotor end plate. After the rotor end plate is positioned, the axis of the rotor end plate is collinear with the pressing axis of the pressing unit. At the same time, the above positioning method is used to increase the positioning speed, thereby increasing the output. At the same time, there are no objects blocking the working area of ​​the pressing unit, thereby ensuring safety during the processing.

[0006] In order to solve the problems of the prior art, the present invention provides a motor rotor stamping device, comprising a workbench; the stamping device also comprises a positioning unit and a pressing unit; a circular groove is vertically penetrated on the workbench, the positioning unit is an annular structure, the positioning unit has a positioning state and a processing state, when the positioning unit is in the positioning state, the positioning unit is a truncated cone structure with a large upper opening and a small lower opening, when the positioning unit is in the processing state, the positioning unit is a cylindrical structure; the pressing unit is arranged above the workbench along the axis of the circular groove; the processing steps are as follows:

[0007] S1. Push the unprocessed rotor end plate to the top of the positioning unit. At this time, the positioning unit is in the positioning state. The positioning unit switches from the positioning device to the processing state. The upper opening of the positioning unit gradually shrinks until it has the same diameter as the lower opening, and the positioning is completed. S2. The pressing unit descends to punch the unprocessed rotor end plate.

[0008] Preferably, the positioning unit comprises a positioning assembly, a driving device and a receiving device; the positioning assembly is arranged in the circular groove along the axis of the circular groove, the positioning assembly is an annular structure, when the positioning unit is in the positioning state, the upper opening of the positioning assembly is larger than the lower opening of the positioning assembly, and when the positioning unit is in the processing state, the positioning assembly is a cylindrical structure; the driving device is arranged on one side of the positioning assembly, and the driving device drives the positioning assembly to switch between the positioning state and the processing state; the receiving device is arranged at the bottom of the positioning assembly, and the receiving device receives the rotor end plate; in the switching of the positioning unit in step S1, the following steps are included:

[0009] S1-1, the positioning assembly is in the positioning state, the unprocessed rotor end plate is pushed into the positioning assembly and received by the receiving device; S1-2, the driving device is started, and the driving device drives the upper opening of the positioning assembly to gradually shrink to the same diameter as the lower opening and then stops, that is, the positioning is completed, and it is in the processing state at this time.

[0010] Preferably, the positioning assembly includes a positioning ring, a first extension plate and a second extension plate; the positioning ring is movably arranged in the circular groove along the axis of the circular groove, and the inner ring diameter of the positioning ring is the same as the outer circumferential diameter of the rotor end plate; there are multiple first extension plates, one end of the first extension plate is hinged on the positioning ring, and the first extension plates are evenly arranged on the positioning ring around the axis of the positioning ring; the second extension plate is slidably arranged on the first extension plate along the axis of the first extension plate; when the positioning assembly is in a positioning state in step S1-1, the annular diameter formed by the end of the second extension plate away from the first extension plate is greater than the annular diameter formed by the end of the first extension plate close to the positioning ring; when the positioning assembly is in a processing state in step S1-2, the annular diameter formed by the end of the second extension plate away from the first extension plate is equal to the annular diameter formed by the end of the first extension plate close to the positioning ring.

[0011] Preferably, the first extension plate and the second extension plate constitute an extension assembly, and there is a gap between adjacent extension assemblies arranged on the positioning ring, and the gap is smaller than the diameter of the rotor end plate.

[0012] Preferably, the receiving device includes a receiving shell and a first linear drive; the first linear drive is arranged below the circular groove along the axis of the circular groove, and the output end of the first linear drive is vertically upward; the receiving shell is fixedly arranged on the output end of the first linear drive, and the upper part of the receiving shell receives the rotor end plate. The receiving shell has a positioning height position and a unloading height position under the drive of the first linear drive, and the unloading height position is lower than the positioning height position. When the receiving shell is at the positioning height position, the upper end face of the receiving shell is coplanar with the upper end face of the positioning ring. When the receiving shell is at the unloading height position, the receiving shell is located below the positioning ring.

[0013] Preferably, there is a cavity in the receiving shell, the bottom of the cavity is inclined, a discharge outlet is horizontally penetrated through the side wall of the receiving shell on the lower side of the cavity bottom, and a processing hole corresponding to the through hole on the rotor end plate after processing is vertically penetrated through the upper part of the receiving shell.

[0014] Preferably, the stamping device also includes a feeding device, which is arranged on the workbench along the length direction of the workbench. The feeding device is located on one side of the positioning unit. The feeding device can push the rotor end plate into the positioning unit, and the working area of ​​the feeding device does not intersect with the working area of ​​the pressing unit.

[0015] Preferably, the stamping device further comprises a discharge device, which is arranged on one side of the receiving device; after the pressing unit completes stamping of the rotor end plate located on the positioning ring, the following steps are further performed:

[0016] S3, the first linear drive drives the receiving shell to descend to the bottom of the positioning ring. The distance between the receiving shell and the positioning ring in the vertical direction is greater than the thickness of the rotor end plate. The discharging device starts and pushes down the rotor end plate on the receiving shell to complete the discharging. Then the first linear drive drives the receiving shell to reset.

[0017] Preferably, the pressing unit includes a pressing head, which is movably arranged above the workbench along the height direction of the workbench, a sliding groove is vertically opened at the bottom of the pressing head, a pressing piece is slidably arranged in the sliding groove, and a pointed cone head is fixedly arranged at the bottom of the pressing piece along the extension direction of the pressing piece. Before punching, the pressing piece with the pointed cone head is located inside the sliding groove, and when punching, the pressing piece with the pointed cone head extends out of the sliding groove.

[0018] The present invention also relates to a stamping method for a brushless permanent magnet motor, which comprises a stamping step for a motor rotor, and the stamping step is applied to a motor rotor stamping device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a positioning unit and a pressing unit, and pushes the rotor end plate into the positioning unit through a pushing device, which is received by a receiving device in the positioning unit, and pushes the unprocessed rotor end plate to the top of the positioning unit. At this time, the positioning unit is in a positioning state, and the positioning unit switches from the positioning device to a processing state. The upper opening of the positioning unit gradually shrinks until it has the same diameter as the lower opening, that is, the positioning is completed, and the pressing unit descends to punch the unprocessed rotor end plate. After the punching is completed, the first linear drive drives the receiving shell to descend to the bottom of the positioning ring, and the distance between the receiving shell and the positioning ring in the vertical direction is greater than the thickness of the rotor end plate. The discharging device is started, and the discharging device pushes down the rotor end plate located on the receiving shell, that is, the unloading is completed, and then the first linear drive drives the receiving shell to reset, thereby optimizing the positioning of the rotor end plate, so that after the rotor end plate is positioned, the axis of the rotor end plate is in line with the pressing axis of the pressing unit, and the above positioning method is used to improve the positioning speed, thereby improving the output, and at the same time, there is no object blocking in the working area of ​​the pressing unit, thereby ensuring the safety of the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a motor rotor stamping device Figure 1 .

[0022] Figure 2A three-dimensional diagram of a motor rotor stamping device Figure 2 .

[0023] Figure 3 The present invention is a three-dimensional schematic diagram of a motor rotor stamping device with the workbench removed.

[0024] Figure 4 A motor rotor stamping device Figure 3 A local enlarged schematic diagram of point A in the middle.

[0025] Figure 5 The invention discloses a sectional stereoscopic schematic diagram of a motor rotor stamping device.

[0026] Figure 6 A motor rotor stamping device Figure 5 A local enlarged schematic diagram of point B in the middle.

[0027] Figure 7 The invention discloses a stereoscopic schematic diagram of a pressing head of a motor rotor stamping device, which is provided with a pressing piece and a pointed cone head.

[0028] Figure 8 The present invention is a three-dimensional schematic diagram of a motor rotor stamping device with a workbench and a feeding device removed.

[0029] Fig. 9 A motor rotor stamping device Figure 8 A partial enlarged schematic diagram of point C in the middle.

[0030] Fig.10 The present invention is a three-dimensional schematic diagram of a positioning unit in a motor rotor stamping device when the positioning unit is in a positioning state.

[0031] Fig.11 The present invention is a three-dimensional schematic diagram of a positioning unit in a motor rotor stamping device when it is in a processing state.

[0032] The numbers in the figure are:

[0033] 1. Workbench; 11. Circular groove; 2. Positioning unit; 21. Positioning assembly; 211. Positioning ring; 212. First extension plate; 213. Second extension plate; 22. Driving device; 221. Pushing block; 222. Pushing groove; 223. Gear ring; 224. Guide groove; 225. Gear; 226. First rotary drive; 23. Receiving device; 231. First linear drive; 232. Receiving shell; 2321. Cavity; 2322. Collecting box; 3. Pressing unit; 31. Lifting device; 32. Pressing head; 321. Pressing piece; 322. Conical head; 4. Rotor end plate; 5. Feeding device; 51. Guide plate; 52. Second linear drive; 53. Pushing plate; 6. Discharging device; 61. Second rotary drive; 62. Rotating claw; 63. Discharging rack. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Reference Figure 1-Figure 3 and Fig.10 : A motor rotor stamping device, comprising a workbench 1; the stamping device also includes a positioning unit 2 and a pressing unit 3; a circular groove 11 is vertically penetrated on the workbench 1, the positioning unit 2 is annular in structure, and the positioning unit 2 has a positioning state and a processing state. When the positioning unit 2 is in the positioning state, the positioning unit 2 is a truncated cone structure with a large upper opening and a small lower opening. When the positioning unit 2 is in the processing state, the positioning unit 2 is a cylindrical structure; the pressing unit 3 is arranged above the workbench 1 along the axis of the circular groove 11; the processing steps are as follows:

[0036] S1. Push the unprocessed rotor end plate 4 to the top of the positioning unit 2. At this time, the positioning unit 2 is in the positioning state. The positioning unit 2 switches from the positioning device to the processing state. The upper opening of the positioning unit 2 gradually shrinks until it has the same diameter as the lower opening, and the positioning is completed. S2. The pressing unit 3 descends to punch the unprocessed rotor end plate 4.

[0037] The pressing unit 3 includes a lifting device 31 and a pressing head 32. The pressing head 32 is arranged above the workbench 1 and moves along the height direction of the workbench 1. The lifting device 31 is arranged on the upper part of the pressing head 32. The lifting device 31 is preferably a linear cylinder. The lifting device 31 is used to drive the pressing head 32 to move. When the positioning unit 2 is in the positioning state, the upper opening of the positioning unit 2 is larger than the lower opening, and the rotor end plate 4 slides in from the upper part of the positioning unit 2. Under the guidance of the positioning unit 2 with the opening larger at the top and smaller at the bottom, after the rotor end plate 4 falls to the bottom of the positioning unit 2, the positioning unit 2 switches from the positioning state to the processing state. The rotor end plate 4 automatically realizes positioning when the positioning unit 2 switches to the processing state. At this time, the axis of the rotor end plate 4 is colinear with the axis of the lifting device 31. Then the lifting device 31 is started, and the lifting device 31 drives the pressing head 32 to descend, and the pressing head 32 punches the rotor end plate 4.

[0038] Reference Figure 1-Figure 3 and Figure 9-11:The positioning unit 2 includes a positioning component 21, a driving device 22 and a receiving device 23; the positioning component 21 is arranged in the circular groove 11 along the axis of the circular groove 11, and the positioning component 21 is annular in structure. When the positioning unit 2 is in the positioning state, the upper opening of the positioning component 21 is larger than the lower opening of the positioning component 21. When the positioning unit 2 is in the processing state, the positioning component 21 is a cylindrical structure; the driving device 22 is arranged on one side of the positioning component 21, and the driving device 22 drives the positioning component 21 to switch between the positioning state and the processing state; the receiving device 23 is arranged at the lower part of the positioning component 21, and the receiving device 23 receives the rotor end plate 4; in the switching of the positioning unit 2 in step S1, the following steps are included:

[0039] S1-1, the positioning assembly 21 is in the positioning state, the unprocessed rotor end plate 4 is pushed into the positioning assembly 21 and received by the receiving device 23; S1-2, the driving device 22 is started, and the driving device 22 drives the upper opening of the positioning assembly 21 to gradually shrink to the same diameter as the lower opening and then stops, that is, the positioning is completed, and it is in the processing state at this time.

[0040] The driving device 22 includes a pushing block 221, a pushing groove 222, a gear ring 223, a guide groove 224, a gear 225 and a first rotary driver 226. The gear ring 223 is rotatably arranged below the workbench 1 along the axis of the circular groove 11. A plurality of pushing grooves 222 are arranged. The pushing grooves 222 are evenly distributed around the axis of the circular groove 11. The extending direction of the pushing groove 222 is parallel to the radial direction of the circular groove 11 and the extending direction of the pushing groove 222 can pass through the center of the circular groove 11. The pushing groove 222 is connected to the circular groove 11. The pushing block 221 is slidably arranged in the pushing groove 222 along the extending direction of the pushing groove 222. A protruding column is fixedly arranged at the bottom of the pushing block 221. A plurality of guide grooves 224 are arranged. The guide grooves 224 are opened on the gear ring 223 around the axis of the gear ring 223. The extending direction of the guide groove 224 is parallel to the radial direction of the gear ring 223. There is an angle between the radial directions, the raised column extends into the guide groove 224, and the raised column slides in the guide groove 224 along the extension direction of the guide groove 224. The gear 225 is arranged on one side of the gear ring 223 along the axis of the gear ring 223, and the gear 225 is meshed with the gear ring 223. The first rotation driver 226 is arranged at the end of the gear 225. The first rotation driver 226 is preferably a servo motor. The first rotation driver 226 drives the gear 225 to rotate, and the gear 225 drives the gear ring 223 to rotate. In this way, the guide groove 224 on the gear ring 223 guides the raised column, and the push block 221 slides in the push groove 222 under the push of the raised column. In this way, all the push blocks 221 located on the end surface of the workbench 1 are synchronously approached toward the axis direction of the circular groove 11, so that the upper opening of the positioning assembly 21 can be gradually reduced.

[0041] Reference Figure 5 and Figure 6 The positioning assembly 21 includes a positioning ring 211, a first extension plate 212 and a second extension plate 213; the positioning ring 211 is arranged in the circular groove 11 along the axis of the circular groove 11, and the inner ring diameter of the positioning ring 211 is the same as the outer diameter of the rotor end plate 4; a plurality of first extension plates 212 are provided, one end of the first extension plate 212 is hinged on the positioning ring 211, and the first extension plates 212 are evenly arranged on the positioning ring 211 around the axis of the positioning ring 211; the second extension plate 213 is slidable along the axis of the first extension plate 212 The second extension plate 213 is dynamically arranged on the first extension plate 212; when the positioning assembly 21 is in the positioning state in step S1-1, the annular diameter formed by the end of the second extension plate 213 away from the first extension plate 212 is larger than the annular diameter formed by the end of the first extension plate 212 close to the positioning ring 211; when the positioning assembly 21 is in the processing state in step S1-2, the annular diameter formed by the end of the second extension plate 213 away from the first extension plate 212 is equal to the annular diameter formed by the end of the first extension plate 212 close to the positioning ring 211.

[0042] When the second extension plate 213 is slidably matched with the first extension plate 212, the second extension plate 213 will not slip off the first extension plate 212, and the end of the second extension plate 213 away from the first extension plate 212 is hinged to the end of the push block 221. When the first rotation driver 226 drives the gear ring 223 to rotate through the gear 225, the gear ring 223 drives the push block 221 to slide in the push groove 222 through the guide groove 224, and the push block 221 can drive the second extension plate 213 to gradually change from an inclined state to a vertical state, that is, when the positioning unit 2 is in the positioning state, the second extension plate 213 is in an inclined state, so that the upper ring formed by the second extension plate 213 The diameter of the first extension plate 212 is larger than the annular diameter formed at the bottom of the second extension plate 213. The extension direction of the first extension plate 212 is parallel to the extension direction of the second extension plate 213. When the rotor end plate 4 enters the range of the circular groove 11, the rotor end plate 4 slides into the upper part of the receiving device 23 under the guidance of the inclined second extension plate 213 and the first extension plate 212. When the positioning unit 2 switches from the positioning state to the processing state, the pushing block 221 pushes the second extension plate 213, so that the second extension plate 213 is changed from the inclined state to the vertical state. When the second extension plate 213 is in the vertical state, the rotor end plate 4 is completely positioned by the first extension plate 212 and the second extension plate 213.

[0043] Reference Fig.10 and Fig.11 : The first extension plate 212 and the second extension plate 213 constitute an extension component, and there is a gap between adjacent extension components arranged on the positioning ring 211, and the gap is smaller than the diameter of the rotor end plate 4.

[0044] The gap between two adjacent extension components on the positioning ring 211 is set smaller than the diameter of the rotor end plate 4, ensuring that the rotor end plate 4 will not fall from the gap between the two adjacent extension components when the rotor end plate 4 is pushed into the range of the circular groove 11.

[0045] Reference Figure 8 and Fig.10 : The receiving device 23 includes a receiving shell 232 and a first linear driver 231; the first linear driver 231 is arranged below the circular groove 11 along the axis of the circular groove 11, and the output end of the first linear driver 231 is vertically upward; the receiving shell 232 is fixedly arranged on the output end of the first linear driver 231, and the upper part of the receiving shell 232 receives the rotor end plate 4. The receiving shell 232 has a positioning height position and a unloading height position under the drive of the first linear driver 231, and the unloading height position is lower than the positioning height position. When the receiving shell 232 is at the positioning height position, the upper end face of the receiving shell 232 is coplanar with the upper end face of the positioning ring 211. When the receiving shell 232 is at the unloading height position, the receiving shell 232 is located below the positioning ring 211.

[0046] Reference Figure 3 , Figure 5 and Figure 6 : There is a cavity 2321 in the receiving shell 232, the bottom of the cavity 2321 is inclined, and a discharge outlet is horizontally penetrated on the side wall of the receiving shell 232 on the lower side of the bottom of the cavity 2321, and a processing hole corresponding to the through hole on the rotor end plate 4 after processing is completed is vertically penetrated on the upper part of the receiving shell 232.

[0047] A collecting box 2322 is provided on one side of the discharge port, and the waste discharged from the discharge port can be collected by the collecting box 2322. When stamping, the pressing head 32 of the pressing device descends, and the pressing head 32 punches the rotor end plate 4 located on the receiving shell 232. The pressed waste passes through the processed hole on the receiving shell 232 and falls into the cavity 2321. Since the bottom of the cavity 2321 is inclined, the waste falling into the cavity 2321 is discharged from the discharge port under the guidance of the bottom of the cavity 2321 and is collected by the collecting box 2322.

[0048] Reference Figure 3 and Figure 4 : The stamping device also includes a feeding device 5, which is arranged on the workbench 1 along the length direction of the workbench 1. The feeding device 5 is located on one side of the positioning unit 2. The feeding device 5 can push the rotor end plate 4 into the positioning unit 2. The working area of ​​the feeding device 5 does not intersect with the working area of ​​the pressing unit 3.

[0049] The feeding device 5 includes a guide plate 51, a second linear drive 52 and a push plate 53. Two guide plates 51 are provided. The two guide plates 51 are symmetrically arranged on both sides of the circular groove 11 along the length direction of the workbench 1. There is a gap between the two guide plates 51. The size of the gap is larger than the diameter of the rotor end plate 4. In this way, when placing the rotor end plate 4, the rotor end plate 4 can be placed more easily between the two guide plates 51. The second linear drive 52 is arranged between the two guide plates 51 along the extension direction of the guide plate 51. The second linear drive 52 is fixedly arranged on the workbench 1, and the push plate 53 is fixedly arranged At the output end of the second linear drive 52, when placing the unprocessed rotor end plate 4, the unprocessed rotor end plate 4 is placed between the two guide plates 51, and then the second linear drive 52 is started, and the second linear drive 52 pushes the unprocessed rotor end plate 4 into the range of the circular groove 11 through the push plate 53. It is worth noting that when the rotor end plate 4 is placed between the two guide plates 51, the rotor end plate 4 is not in the working area of ​​the pressing unit 3, and when the second linear drive 52 drives the push plate 53 to fully extend, the push plate 53 will not enter the working area of ​​the pressing unit 3, thereby ensuring the safety of production.

[0050] Reference Figure 3 , Figure 8 and Fig. 9 : The stamping device also includes a discharge device 6, which is arranged on one side of the receiving device 23; after the pressing unit 3 completes the stamping of the rotor end plate 4 located on the positioning ring 211, there are the following steps:

[0051] S3, the first linear drive 231 drives the receiving shell 232 to descend to the bottom of the positioning ring 211, the distance between the receiving shell 232 and the positioning ring 211 in the vertical direction is greater than the thickness of the rotor end plate 4, the discharging device 6 is started, and the discharging device 6 pushes down the rotor end plate 4 on the receiving shell 232, and the discharging is completed, and then the first linear drive 231 drives the receiving shell 232 to reset.

[0052] The above-mentioned first linear drive 231 adjusts the gear and resets the receiving shell 232, which refers to the state when the upper end face of the receiving shell 232 is coplanar with the upper end face of the positioning ring 211. The discharging device 6 includes a second rotary drive 61, a rotating claw 62 and a discharging rack 63. The second rotary drive 61 is vertically arranged on one side of the receiving shell 232, the rotating claw 62 is fixedly arranged on the output end of the second rotary drive 61, and the discharging rack 63 is arranged on one side of the receiving shell 232 along the length direction of the workbench 1. The second rotary drive 61 is preferably a servo motor. When the first linear drive 231 drives the receiving shell 232 to descend to the bottom of the positioning ring 211, the second rotary drive 61 is started, and the second rotary drive 61 drives the rotating claw 62 to rotate. The rotating claw 62 pushes the rotor end plate 4 located on the receiving shell 232 onto the discharging rack 63, and the discharging rack 63 guides the rotor end plate 4 falling on it to be discharged.

[0053] Reference Figure 7 The pressing unit 3 includes a pressing head 32, which is movably arranged above the workbench 1 in the height direction of the workbench 1. A sliding groove is vertically opened at the bottom of the pressing head 32, in which a pressing piece 321 is slidably arranged. A pointed cone head 322 is fixedly arranged at the bottom of the pressing piece 321 along the extension direction of the pressing piece 321. Before punching, the pressing piece 321 with the pointed cone head 322 is located inside the sliding groove. When punching, the pressing piece 321 with the pointed cone head 322 extends out of the sliding groove.

[0054] During pressing, the pointed cone head 322 is located in the sliding groove, and the pressing head 32 is driven by the lifting device 31 to contact the upper part of the rotor end plate 4. Then, the pressing piece 321 slides out of the sliding groove under the action of hydraulic pressure, and the pointed cone head 322 at the end of the pressing piece 321 will first contact the rotor end plate 4. After contacting the rotor end plate 4, the pointed cone head 322 will push out a small hole on the rotor end plate 4. In this way, when the pressing piece 321 extends from the sliding groove, the pressing piece 321 can more easily punch out a through hole on the rotor end plate 4.

[0055] Reference Figure 1-Figure 11 : The present invention also relates to a stamping method for a brushless permanent magnet motor, which method includes a stamping step for a motor rotor, and the stamping step is applied to a motor rotor stamping device.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A motor rotor stamping device, comprising a workbench (1); It is characterized in that The punching device also includes a positioning unit (2) and a pressing unit (3); A circular groove (11) is vertically penetrated on the workbench (1); the positioning unit (2) is an annular structure; the positioning unit (2) has a positioning state and a processing state; when the positioning unit (2) is in the positioning state, the positioning unit (2) is a truncated cone structure with a large upper opening and a small lower opening; when the positioning unit (2) is in the processing state, the positioning unit (2) is a cylindrical structure; The pressing unit (3) is arranged above the workbench (1) along the axis of the circular groove (11); The processing steps are as follows: S1, pushing the unprocessed rotor end plate (4) onto the top of the positioning unit (2), at which time the positioning unit (2) is in a positioning state, the positioning unit (2) switches from a positioning device to a processing state, and the upper opening of the positioning unit (2) gradually shrinks until it has the same diameter as the lower opening, thus completing the positioning; S2, the pressing unit (3) descends to press the unprocessed rotor end plate (4); The positioning unit (2) comprises a positioning component (21), a driving device (22) and a receiving device (23); The positioning component (21) is arranged in the circular groove (11) along the axis of the circular groove (11); the positioning component (21) is an annular structure; when the positioning unit (2) is in a positioning state, the upper opening of the positioning component (21) is larger than the lower opening of the positioning component (21); when the positioning unit (2) is in a processing state, the positioning component (21) is a cylindrical structure; The driving device (22) is arranged on one side of the positioning component (21), and the driving device (22) drives the positioning component (21) to switch between a positioning state and a processing state; The receiving device (23) is arranged at the lower part of the positioning assembly (21), and the receiving device (23) receives the rotor end plate (4); In the switching of the positioning unit (2) in step S1, the following steps are included: S1-1, the positioning assembly (21) is in a positioning state, and an unprocessed rotor end plate (4) is pushed into the positioning assembly (21) and received by the receiving device (23); S1-2, the driving device (22) is started, and the driving device (22) drives the upper opening of the positioning component (21) to gradually shrink to the same diameter as the lower opening and then stops, that is, the positioning is completed, and the processing state is in progress; The positioning assembly (21) comprises a positioning ring (211), a first extension plate (212) and a second extension plate (213); The positioning ring (211) is movably arranged in the circular groove (11) along the axis of the circular groove (11), and the inner ring diameter of the positioning ring (211) is the same as the outer circumferential diameter of the rotor end plate (4); A plurality of first extension plates (212) are provided, one end of the first extension plate (212) is hinged to the positioning ring (211), and the first extension plates (212) are evenly arranged on the positioning ring (211) around the axis of the positioning ring (211); The second extension plate (213) is slidably disposed on the first extension plate (212) along the axis of the first extension plate (212); In step S1-1, when the positioning assembly (21) is in a positioning state, the diameter of the ring formed by the end of the second extension plate (213) away from the first extension plate (212) is greater than the diameter of the ring formed by the end of the first extension plate (212) close to the positioning ring (211); In step S1-2, when the positioning assembly (21) is in a processing state, the diameter of the ring formed by the end of the second extension plate (213) away from the first extension plate (212) is equal to the diameter of the ring formed by the end of the first extension plate (212) close to the positioning ring (211); The receiving device (23) comprises a receiving shell (232) and a first linear drive (231); The first linear drive (231) is arranged below the circular groove (11) along the axis of the circular groove (11), and the output end of the first linear drive (231) is vertically upward; The receiving shell (232) is fixedly arranged on the output end of the first linear drive (231), and the upper part of the receiving shell (232) receives the rotor end plate (4). The receiving shell (232) has a positioning height position and a material removal height position under the drive of the first linear drive (231), and the material removal height position is lower than the positioning height position. When the receiving shell (232) is at the positioning height position, the upper end surface of the receiving shell (232) is coplanar with the upper end surface of the positioning ring (211), and when the receiving shell (232) is at the material removal height position, the receiving shell (232) is located below the positioning ring (211).

2. A motor rotor stamping device according to claim 1, characterized in that: The first extension plate (212) and the second extension plate (213) constitute an extension component, and a gap exists between adjacent extension components arranged on the positioning ring (211), and the gap is smaller than the diameter of the rotor end plate (4).

3. The motor rotor stamping device according to claim 1, characterized in that: A cavity (2321) is contained in the receiving shell (232), the bottom of the cavity (2321) is inclined, a discharge port is horizontally penetrated through the side wall of the receiving shell (232) on the lower side of the bottom of the cavity (2321), and a processing hole corresponding to the through hole on the rotor end plate (4) after processing is vertically penetrated through the upper part of the receiving shell (232).

4. The motor rotor stamping device according to claim 1, characterized in that: The punching device further comprises a feeding device (5), which is arranged on the workbench (1) along the length direction of the workbench (1), and the feeding device (5) is located on one side of the positioning unit (2). The feeding device (5) can push the rotor end plate (4) into the positioning unit (2), and the working area of ​​the feeding device (5) does not intersect with the working area of ​​the pressing unit (3).

5. The motor rotor stamping device according to claim 4, characterized in that: The punching device further comprises a discharge device (6), wherein the discharge device (6) is arranged on one side of the receiving device (23); After the pressing unit (3) completes stamping of the rotor end plate (4) located on the positioning ring (211), the following steps are performed: S3, the first linear drive (231) drives the receiving shell (232) to descend to the bottom of the positioning ring (211), the distance between the receiving shell (232) and the positioning ring (211) in the vertical direction is greater than the thickness of the rotor end plate (4), the discharging device (6) is started, and the discharging device (6) pushes down the rotor end plate (4) on the receiving shell (232), thus completing the discharging, and then the first linear drive (231) drives the receiving shell (232) to reset.

6. The motor rotor stamping device according to claim 1, characterized in that: The pressing unit (3) comprises a pressing head (32), the pressing head (32) being arranged above the workbench (1) and being movable along the height direction of the workbench (1), a sliding groove being vertically provided at the bottom of the pressing head (32), a pressing piece (321) being slidingly arranged in the sliding groove, a pointed cone head (322) being fixedly arranged at the bottom of the pressing piece (321) along the extension direction of the pressing piece (321), before punching, the pressing piece (321) provided with the pointed cone head (322) is located inside the sliding groove, and when punching, the pressing piece (321) provided with the pointed cone head (322) extends out from the sliding groove.

7. A stamping method for a brushless permanent magnet motor, characterized in that: The method comprises a stamping step for an electrode rotor, and the stamping step is applied to a motor rotor stamping device as described in any one of claims 1-6.

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