Receiving and transferring device

Abstract

The utility model discloses a material receiving and transferring device which comprises a material receiving mechanism and a transferring mechanism, the transferring mechanism comprises a movable tray, the material receiving mechanism comprises a material receiving rod, and the material receiving rod can be lifted up and down and is used for receiving stacked workpieces punched by a punching die and placing the received stacked workpieces on the movable tray. And through the cooperation of the material receiving rod and the movable tray, the transfer efficiency of the laminated workpieces manufactured by the stamping die is greatly improved, and a basis is provided for subsequent automatic lamination of the stator iron cores.

Description

Technical Field

[0001] This utility model relates to the field of stator core manufacturing technology, and in particular to a material receiving and transfer device used in the stator core manufacturing process. Background Technology

[0002] As competition intensifies in the new energy vehicle market, the demands on automotive drive motors are increasing, moving towards higher efficiency, higher power, and higher speeds. This has led to a trend towards thinner and stronger silicon steel sheets for motors. To achieve optimal performance, the thickness of silicon steel sheets has gradually increased from 0.5mm to 0.35mm, 0.27mm, 0.15mm, and even 0.10mm. Some companies have even adopted amorphous materials to produce motor cores.

[0003] Although amorphous materials have excellent properties, they are brittle, resulting in stator cores with poor strength and stability. In this case, performance and strength are contradictory.

[0004] Therefore, our company has developed a stator core that solves the above contradictions. It is made by setting silicon steel end pieces at both ends of a laminated workpiece made of amorphous material. Of course, silicon steel end pieces can also be inserted between the laminated workpieces in an orderly or disordered manner. This not only improves the performance of the stator core, but also ensures the strength of the electronic core.

[0005] Due to the high brittleness of amorphous materials, directly stamping an amorphous ring using a die is quite difficult, and the resulting ring is easily broken, resulting in a low success rate. Therefore, our company stamps multiple amorphous materials into fan-shaped stacked parts, which are then sequentially assembled into a ring. However, currently, stacked parts stamped by die are manually transferred before being stacked, significantly reducing transfer efficiency and affecting the stacking efficiency of the stator core. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model proposes a material receiving and transfer device to improve the transfer efficiency of stacked workpieces.

[0007] This utility model is achieved through the following technical solution: a material receiving and transfer device, including a material receiving mechanism and a transfer mechanism, wherein the transfer mechanism includes a movable pallet, and the material receiving mechanism includes a material receiving rod, which can be raised and lowered to receive stacked workpieces stamped by a stamping die and place the received stacked workpieces on the movable pallet.

[0008] As a further improved technical solution, the mobile tray is provided with a first through hole, which is adapted to the receiving rod, and the receiving rod can pass through the first through hole vertically.

[0009] As a further improved technical solution, the mobile tray is provided with a sorting mechanism, which includes a pair of grippers that can move closer to or further away from each other, forming a sorting space between the grippers. Rollers are provided on both sides of one gripper, and the rollers are located within the sorting space. The first perforation is opposite to the sorting space.

[0010] As a further improved technical solution, the mobile pallet can slide to the weighing station. The material receiving and transfer device also includes a weighing mechanism and a piece-adding / reducing mechanism. The weighing mechanism is used to weigh the stacked workpieces located at the weighing station. The piece-adding / reducing mechanism includes a piece-adding / reducing robot. When the weight of the stacked workpieces weighed by the weighing mechanism is greater than the weight set value, the piece-adding / reducing robot transfers the single workpieces on the stacked workpieces to the third storage station until the weight of the stacked workpieces at the weighing station equals the weight set value. When the weight of the stacked workpieces weighed by the weighing mechanism is less than the weight set value, the piece-adding / reducing robot transfers the single workpieces on the third storage station to the stacked workpieces on the weighing station until the weight of the stacked workpieces on the weighing station equals the weight set value. When the weight of the stacked workpieces weighed by the weighing mechanism equals the weight set value, the transfer robot transfers the stacked workpieces on the weighing station to the first storage station.

[0011] As a further improved technical solution, the weighing mechanism includes a first driving mechanism, a first support plate, a weighing sensor disposed on the first support plate, and a top rod disposed on the weighing sensor. The first driving mechanism can drive the first support plate, the weighing sensor, and the top rod to move up and down together. When the top rod moves upward, the top rod can lift the stacked workpiece located at the weighing station upward, and the weighing sensor weighs the weight of the stacked workpiece.

[0012] As a further improved technical solution, the movable tray is provided with a second through hole, which is adapted to the top rod. The top rod can pass through the second through hole from bottom to top to lift the corresponding stacked workpieces. The second through hole corresponds to the sorting space.

[0013] As a further improved technical solution, the addition and subtraction robot includes a third support plate that can be raised and lowered. The third support plate is provided with a plurality of second suction nozzles, which can be used to pick up single pieces of workpieces. The third support plate can drive the second suction nozzles to rise and fall together.

[0014] As a further improved technical solution, the addition / subtraction robot includes two sets of guide rods, with a guide space formed between the two sets of guide rods, and the third support plate can move up and down along the guide space.

[0015] As a further improved technical solution, the transfer robot includes two sets of clamping arms. The lower end of each clamping arm is provided with a clamping hook. The clamping hooks of the two sets of clamping arms are arranged opposite to each other. The two sets of clamping arms can move closer to each other or further away from each other. A clamping space is formed between the two sets of clamping arms. When the clamping hooks move closer to each other as the two sets of clamping arms move closer to each other, the clamping hooks are used to clamp the stacked workpieces.

[0016] As a further improved technical solution, the clamping space is provided with a pressure plate that can be raised and lowered.

[0017] Compared with the prior art, this utility model realizes the automatic transfer of stacked workpieces made by stamping mold through the cooperation of the material receiving rod that can be raised and lowered and the moving pallet, eliminating the need for manual transfer and greatly improving the transfer efficiency of stacked workpieces. It achieves a seamless connection between automatic transfer and automatic stacking of stacked workpieces, and improves the accuracy of subsequent automatic stacking through the setting of weighing mechanism and adding / removing piece mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a stator core structure in this utility model.

[0019] Figure 2 yes Figure 1 A schematic diagram of the mid-terminal chip.

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of a medium-sized toroidal body.

[0021] Figure 4 yes Figure 3 A schematic diagram of the structure of a mid-layer stacked workpiece.

[0022] Figure 5 This is a schematic diagram of the structure of a single workpiece.

[0023] Figure 6 This utility model relates to an automatic stacking system for stator cores.

[0024] Figure 7 This is a schematic diagram of the assembly of the rotating indexing plate and the first guide rail in this utility model.

[0025] Figure 8 This is a schematic diagram of the transplanting robot and the assembling robot in this utility model.

[0026] Figure 9 yes Figure 8 A schematic diagram of the structure of the clamping arm and the clamping hook.

[0027] Figure 10 This is a structural schematic diagram of the assembled robotic arm in this utility model.

[0028] Figure 11 This is a schematic diagram of the weighing mechanism in this utility model.

[0029] Figure 12 This is a schematic diagram of the structure of the addition / subtraction robot in this utility model.

[0030] Figure 13 This is a schematic diagram of one type of material receiving mechanism in this utility model.

[0031] Figure 14 This is another structural schematic diagram of the receiving mechanism in this utility model.

[0032] Figure 15 This is the structure of the movable tray in this utility model.

[0033] Figure 16 yes Figure 6 Enlarged view of part A in the middle.

[0034] Figure 17 This is a schematic diagram of the pre-compression mechanism in this utility model. Detailed Implementation

[0035] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1 to 17 As shown, this application provides an automatic stacking system for stator core 100, used for the automatic stacking of stator core 100. Please refer to [link to relevant documentation]. Figures 1-5As shown, the stator core 100 includes end pieces 110 made of silicon steel at both ends and a plurality of annular bodies 120 disposed between the end pieces 110. The annular body 120 includes a plurality of stacked workpieces 121, which are fan-shaped. The stacked workpiece 121 includes a plurality of single workpieces 1210, which are also fan-shaped. The plurality of single workpieces 1210 are stacked to form the stacked workpiece 121. The single workpieces 1210 are preferably made of amorphous material. Of course, the single workpieces 1210 can also be made of silicon steel or even other soft magnetic materials. The materials of the single workpieces 1210 can be the same or different. The boundaries of adjacent single workpieces 1210 within the stacked workpiece 121 are not shown in the figure. The same annular body 120 is formed by splicing several stacked workpieces 121 end to end. In this embodiment, the stacked workpieces 121 are spliced ​​end to end through the cooperation between the splicing groove 122 and the splicing block 123. Among them, end pieces 110 can be inserted between the annular bodies 120 in an orderly or disordered manner. For example, end pieces 110 are inserted between adjacent layers of annular bodies 120, or end pieces 110 are inserted between multiple layers of annular bodies. In this case, the number of multiple layers can be equal or unequal.

[0038] The automatic stator core stacking system 200 includes a rounding mechanism, an end piece assembly mechanism, and a rotary indexing plate 201. The rotary indexing plate 201 can move back and forth between the rounding station and the assembly station. The rounding mechanism includes a rounding robot 202, and the end piece assembly mechanism includes an assembly robot 203. When the rotary indexing plate 201 is located at the rounding station, the rounding robot 202 can transfer the stacked workpieces 121 placed on the first storage station 204 to the rotary indexing plate 201. After placing one stacked workpiece 121, the rotary indexing plate 201 rotates a certain angle to facilitate the rounding robot 202 to place the next stacked workpiece 121 from the same position onto the rotary indexing plate 201 and splice it with its adjacent stacked workpieces 121. When the rotary indexing plate 201 is located at the assembly station, the assembly robot 203 can transfer the end piece 110 placed on the second storage station 205 to the rotary indexing plate 201.

[0039] For details, please refer to Figure 6 , 7As shown, the rotary indexing disk 201 includes a disk body 206 that can rotate circumferentially. The disk body 206 is provided with a limiting member, which limits the stacked workpieces 121 and the end piece 110 placed on the disk body 206, so that the stacked workpieces 121 placed on the disk body 206 are distributed in an orderly manner. Multiple stacked workpieces 121 can be assembled into an annulus 120 in an orderly manner, and the annulus 120 and the end piece 110 are coaxially arranged. The limiting component can be a ring 207, which is coaxially arranged with the disk 206. When the stacked workpiece 121 is placed on the disk 206, one end of the stacked workpiece 121 abuts against the limiting component. In this embodiment, the outer periphery of the ring 207 abuts against the inner periphery of the ring 120 and the end piece 110. The limiting component can also be arranged in other ways, such as two coaxially arranged rings, or several limiting rods. The several limiting rods are divided into two groups, and a limiting space is formed between the two rings or between the two groups of limiting rods. The stacked workpiece 121 is placed in the limiting space. Of course, the limiting component can also be arranged in other forms, which will not be elaborated here.

[0040] In this embodiment, the disk body 206 is also provided with a plurality of positioning posts 233. The plurality of positioning posts 233 are arranged around the periphery of the ring body 207. The positioning posts 233 are used to insert into the stator slot 130 of the stator core 100 to prevent the end pieces 110 stacked on the rotating indexing disk 201 from rotating with the stacked workpieces 121, and can also play a certain limiting role.

[0041] The rotation of the rotary indexing plate 201 is the same as in the prior art, and will not be described in detail here.

[0042] The rotary indexing plate 201 can move back and forth in a straight line between the round assembly station and the assembly station, or it can move back and forth in a curve. Its movement path is unrestricted. In this embodiment, in order to reduce its movement trajectory and improve operating efficiency, the rotary indexing plate 201 moves in a straight line between the round assembly station and the assembly station via the first guide rail 231.

[0043] The stacked workpieces 121, which are stamped by the stamping die, are placed on the first storage station 204 by the manual. The assembly robot 202 picks up the stacked workpieces 121 and transfers them to the rotary indexing plate 201. The end pieces 110, which are stamped by the stamping die, are placed on the second storage station 204 by the manual. The assembly robot 203 picks up the end pieces 110 and transfers them to the rotary indexing plate 201.

[0044] To ensure the strength of the stator core 100 after stacking, the rotary indexing plate 201 is located at the assembly station at the beginning and end of stacking. The assembly robot 203 places the end piece 110 on the rotary indexing plate 201 to ensure that the end piece 110 is located at both ends of the entire stator core 100.

[0045] By setting up the rotating indexing plate 201, the assembly mechanism, and the rounding mechanism, the automatic stacking efficiency of the stator core 100 is greatly improved.

[0046] In another embodiment, a weighing mechanism and a weighing / loosening mechanism are used to accurately measure the stacked workpieces 121 placed on the first storage station 204. For details, please refer to... Figure 11 As shown, the weighing mechanism is used to weigh the stacked workpieces 121 located at the weighing station. It includes a first driving mechanism, a first support plate 208, a weighing sensor 209 disposed on the first support plate 208, and a push rod 210 disposed on the weighing sensor 209. The first driving mechanism can drive the first support plate 208, the weighing sensor 209, and the push rod 210 to move up and down together. When the push rod 210 moves upward, it can lift the stacked workpieces 121 located at the weighing station upward, and the weighing sensor 209 weighs the stacked workpieces. In this embodiment, the first driving mechanism is a first cylinder 211, but it can also be other driving mechanisms, as long as they can drive the first support plate 208, the weighing sensor 209, and the push rod 210 to move up and down together.

[0047] The addition / reduction mechanism includes an addition / reduction robot 212. When the weight of the stacked workpiece 121 weighed by the weighing mechanism is greater than the weight setting value, the addition / reduction robot 212 transfers the single workpiece 1210 on the stacked workpiece 121 to the third storage station 213 until the weight of the stacked workpiece 121 on the weighing station equals the weight setting value. When the weight of the stacked workpiece 121 weighed by the weighing mechanism is less than the weight setting value, the addition / reduction robot 212 transfers the single workpiece 1210 on the third storage station 213 to the stacked workpiece 121 on the weighing station until the weight of the stacked workpiece 121 on the weighing station equals the weight setting value. When the weight of the stacked workpiece 121 weighed by the weighing mechanism equals the weight setting value, the transfer robot 214 transfers the stacked workpiece 121 on the weighing station to the first storage station 204.

[0048] By setting up a weighing mechanism and a plate-adding / reducing mechanism, the height and weight of the stacked workpieces 121 within the same annular body 120 are ensured to be equal, thereby improving the stability of the stator core 100 after stacking, further reducing manual workload, and improving stacking efficiency.

[0049] In another embodiment, in order to enable further automatic stacking of the stator core 100, the automatic stacking system of the stator core further includes a receiving mechanism and a transfer mechanism. The receiving mechanism is used to receive the stacked workpiece 121 and transfer the stacked workpiece 121 to the transfer mechanism. The transfer mechanism is used to transfer the stacked workpiece 121 received by the receiving mechanism to the weighing station.

[0050] For details, please refer to Figures 13-15As shown, the receiving mechanism includes a receiving rod 215 that can be raised and lowered, and the transfer mechanism includes a movable tray 216. The movable tray 216 is provided with a first through hole 217 and a second through hole 218. The first through hole 217 is adapted to the receiving rod 215, and the receiving rod 215 can pass through the first through hole 217 to receive the stacked workpiece 121 and place the stacked workpiece 121 on the movable tray 216. The second through hole 218 is adapted to the top rod 210, and the top rod 210 can pass through the second through hole 218 to lift the corresponding stacked workpiece 121.

[0051] The receiving rod 215 is connected to the second drive mechanism, which can drive the receiving rod 215 to move vertically upward and pass through the first through hole 217. The second drive mechanism can also drive the receiving rod 215 to move vertically downward so that it is located below the moving tray 216. The second drive mechanism is preferably the second cylinder 219, but other types of drive mechanisms are also possible.

[0052] The stacked workpiece 121 is made by stamping multiple pieces of amorphous material or other soft magnetic material by a stamping die. By setting the receiving rod 215, the entire automatic stacking system is directly connected to the stamping die, thus laying the foundation for the full automation of the overall preparation of the stator core.

[0053] The receiving rod 215 can be one or multiple. When there is only one receiving rod 215, its size is generally thicker. In this case, there is also one first through hole 217, and the central axis of the receiving rod 215, the central axis of the first through hole 217, and the center of gravity of the stacked workpiece 121 to be received coincide. The area of ​​the first through hole 217 is preferably close to but smaller than the end face area of ​​the stacked workpiece 121. When there are multiple receiving rods 215, there are also multiple first through holes 217, and the multiple receiving rods 215 are arranged according to... The center of gravity of the stacked workpieces 121 to be received is symmetrically distributed. Whether it is one or multiple rods, it is necessary to ensure the balance of the receiving rod 215 in receiving the stacked workpieces. Furthermore, the area of ​​one first through hole 215 or the sum of the areas of multiple first through holes 215 must be smaller than the end face area of ​​the stacked workpieces 121 to be received. This ensures that when the receiving rod 215 moves downward and is located below the moving tray 216, the stacked workpieces 121 on the receiving rod 214 can be stably placed on the moving tray 216. Similarly, the number, distribution, and area of ​​the top rods 210 are the same as those of the receiving rods 215. That is, there can be one or more top rods 210. When there is one top rod 210, its central axis coincides with the center of gravity of the stacked workpiece 121 to be weighed. When there are multiple top rods 210, the multiple top rods 210 are symmetrically distributed according to the center of gravity of the stacked workpiece 121 to be weighed, and the end area of ​​the top rod 210 is smaller than the end face area of ​​the stacked workpiece 121 to be weighed. The second through hole 218 corresponds to and is adapted to the top rod 210. In this embodiment, there is a pair of receiving rods 215, and the top rods 210, the first through hole 217, and the second through hole 218 are all a pair. One pair of receiving rods 215 is set on the second support plate 234. The second support plate 234 is connected to the second cylinder 219. The second cylinder 219 can drive the second support plate 234 and the receiving rods 215 to rise and fall vertically.

[0054] In another embodiment, when the stacked workpieces 121 are placed on the moving tray 216, they are arranged by a sorting mechanism to make them more neatly arranged, which is beneficial to the accuracy of subsequent assembly.

[0055] For details, please refer to Figure 16As shown, the sorting mechanism includes a pair of grippers 220. The grippers 220 can move closer to or further away from each other, forming a sorting space 221 between them. One gripper 220 has an arc-shaped protrusion 222 on the side facing the sorting space 221, and the other gripper 220 has an arc-shaped concave portion 223 on the side facing the sorting space 221. The arc-shaped protrusion 222 and the arc-shaped concave portion 223 make the sorting space 221 fit the arc surface of the stacked workpiece 121. Rollers 224 are provided on both sides of one gripper 220. The rollers 224 partially extend into the sorting space 221 and can rotate relative to the gripper 220. The cooperation between the rollers 224 and the gripper 220 can sort the stacked workpiece 121, making the stacked workpiece 121 neat. The arc-shaped concave portion 223, the arc-shaped protrusion 222, and the rollers 224 can all reduce the wear of the stacked workpiece 121 during the sorting process. To better facilitate material receiving and weighing, the first perforation 217 and the second perforation 218 are both corresponding to the sorting space 221. In this embodiment, the first perforation 217 and the second perforation 218 are a pair and overlap each other. The top rod 210 and the receiving rod 215 are of equal size. The pair of grippers 220 can also be brought closer or moved away from each other by a pair of cylinders.

[0056] In this embodiment, there are multiple sorting mechanisms, all of which are set on the same mobile tray 216, so that there are multiple corresponding receiving mechanisms and weighing mechanisms. This can correspond to multiple stamping dies and simultaneously receive the stacked workpieces 121 stamped by multiple stamping dies, providing a basis for the automatic stacking of multiple stator cores in the future, thereby improving the stacking efficiency.

[0057] In this embodiment, the sequential arrangement of the receiving mechanism, transfer mechanism, sorting mechanism, weighing mechanism, piece-adding / reducing mechanism, and transfer robot forms an automatic receiving and transfer device for stacked workpieces. This device enables the automatic transfer of stacked workpieces made by stamping molds without the need for manual transfer, greatly improving the transfer efficiency of stacked workpieces. It also achieves seamless connection between automatic transfer and automatic stacking of stacked workpieces. Furthermore, the setting of the weighing mechanism and piece-adding / reducing mechanism improves the subsequent automatic stacking accuracy.

[0058] In another embodiment, the automated stacking system further includes a pre-compression mechanism, please refer to... Figure 15 As shown, the pre-pressing mechanism includes a pre-pressing plate 225 disposed above the pre-pressing station. The pre-pressing plate 225 can move closer to or further away from the pre-pressing station. After the stacked workpiece 121 and end piece 110 are stacked to form a stator core 100, the rotating indexing plate 201 is transferred to the pre-pressing station, and the pre-pressing plate 225 moves downward to pre-press the stator core 100 on the pre-pressing station. In this embodiment, the pre-pressing plate 225 is connected to a third cylinder 235, which can drive the pre-pressing plate 225 to move up and down.

[0059] When the pre-pressing plate 225 moves downward a distance greater than the set distance, the assembly robot 203 grabs the end piece 110 on the second storage station 205 and transfers it to the stator core on the pre-pressing station until the pre-pressing plate 225 moves downward a distance equal to the set distance. When the pre-pressing plate 225 moves downward a distance less than the set distance, the assembly robot 203 transfers the end piece 110 on the pre-pressing station to the second storage station 205 until the pre-pressing plate 225 moves downward a distance equal to the set distance. Through the pre-pressing mechanism, not only is the stacked stator core pre-pressed, but its height can also be detected. After pre-pressing, the stator core on the rotating indexing plate 201 is conveyed out. After being conveyed to a specific position, it can be manually transferred for the next processing step, or it can be automatically processed at a specific position for the next processing step.

[0060] To better save space in the automated stacking system, in this embodiment, the rounding station, assembly station, and pre-pressing station are located on the same straight line, and the rounding robot 202, assembly robot 203, and transfer robot 214 are slidably mounted on the second guide rail 232. The rounding station is located below the rounding robot 202, the assembly station is located below the assembly robot 203, and the second storage station 205 is located below the assembly station and opposite the assembly robot 203. When it is necessary to grasp the end piece 110, the assembly robot 203 only needs to move up and down to grasp it. At this time, the end piece grasped by the assembly robot 203 is generally multi-layered. Among them, the rounding robot 202, assembly robot 203, and transfer robot 214 are all slidably mounted on the second guide rail 232 by a walking motor. Of course, other types of drive mechanisms can also be used to drive the robots to slide back and forth on the guide rail.

[0061] In this embodiment, in order to improve stacking efficiency, both the first guide rail 231 and the second guide rail 232 are multiple and arranged in parallel. The number of the corresponding moving pallet 216, transplanting robot 214, assembling robot 202, assembly robot 203, and adding / removing piece robot 212 is equal to the number of the first guide rail 231.

[0062] In this embodiment, please refer to Figures 8-10As shown, the transplanting robot 214, the assembling robot 202, and the assembly robot 203 are each equipped with two sets of gripping arms 226. The two sets of gripping arms 226 can move up and down together. Each gripping arm 226 has a gripping hook 227 at its lower end. The gripping hooks 227 on the two sets of gripping arms 226 are positioned opposite each other, and the two sets of gripping arms 226 can move closer or further apart, forming a gripping space between them. When the gripping arms 226 grasp the stacked workpiece 121 or the end piece 110, the two sets of gripping arms 226 move away from each other, and the gripping arms 226 move downwards. After a certain distance is established, the two sets of clamping arms 226 approach each other, allowing the stacked workpieces 121 or end pieces 110 to be clamped onto the clamping hooks 227. Since the thickness of a single end piece 110 is relatively thin, it is difficult to grasp it using only the clamping arms and hooks. Therefore, the assembly robot 203 also includes a circular disc 236. Several first suction nozzles 237 are evenly distributed on the circular disc 236. The first suction nozzles 237 are connected to a suction mechanism, and the circular disc 236 can move up and down via a drive mechanism. Thus, the circular disc 236 drives the first suction nozzles 237 to move up and down together. When needed... When picking up a single end piece 110, the annular disk 236 moves downward and approaches the end piece 110 on the second storage station 205. The suction mechanism causes the first suction nozzle 237 to pick up the single end piece 110 and move it upward. Then, the rotating indexing disk 201 on the pre-pressing station moves to the assembly station, and the picked-up single end piece 110 is placed on the rotating indexing disk 201. Then, the rotating indexing disk 201 moves back to the pre-pressing station for pre-pressing. Of course, when it is necessary to pick up a single end piece on the rotating indexing disk 201, the rotating indexing disk 201 moves from the pre-pressing station to the assembly station. In position 236, the annular disc 236 drives the first suction nozzle 237 to move downward to pick up the single end piece 110. Then, the rotating indexing plate 201 moves to the pre-pressing station. The annular disc 236 moves downward to place the picked-up single end piece 110 on the second storage station 205. Alternatively, the annular disc 236 can move to the pre-pressing station to pick up the single end piece on the rotating indexing plate or pick up the single end piece on the second storage station 205 and transfer it to the rotating indexing plate on the pre-pressing station. The principle and method of the suction mechanism and the first suction nozzle 237 for picking up thin parts are the same as the prior art and will not be described in detail here.

[0063] A plurality of posts 240 are also fixed on the annular disk 236. When the annular disk 236 approaches the single end piece 110, the ends of the posts 240 are inserted into the stator slots 130 on the end piece 110. Then, the first suction nozzle 237 picks up the end piece 110, allowing the end piece 110 to move upward along the posts 240 and be held by the first suction nozzle 237. In this embodiment, the first suction nozzle 237 and the posts 240 are spaced apart.

[0064] Since the first suction nozzle 237 picks up the end face of the single end piece 110, while the gripping arms are located on the outer periphery of the end piece 110 during gripping, Figure 9 The assembly robot 203 shown only shows the annular disk 236 and the first suction nozzle 237. The clamping arm and clamping hook on the assembly robot 203 are arranged around the outer periphery of the annular disk 236, and the structure and operation mode of the clamping arm and clamping hook are the same as those of the assembly robot and the transplanting robot.

[0065] Since the single workpiece 1210 is also a thin part, the addition and subtraction robot 212 includes a third support plate 238. The third support plate 238 is provided with a number of second suction nozzles 239. The third support plate 238 can drive the second suction nozzles 239 to move up and down. The second suction nozzles 239 can pick up the single workpiece 1210 on the weighing station and transfer it to the third storage station, or pick up the single workpiece 1210 on the third storage station 213 and transfer it to the stacked workpieces on the weighing station.

[0066] In this embodiment, the addition / subtraction robot 212 also includes two sets of guide rods 241, and a guide space is formed between the two sets of guide rods 241. The third support plate 238 can move up and down along the guide space to ensure the lifting stability of the third support plate 238, thereby improving the stable transfer of the single workpiece 1210 after it is picked up by the second suction nozzle 239.

[0067] The transplanting robot 214 and the assembling robot 202 are equipped with a pressure plate 229, which is connected to a third drive mechanism. The pressure plate 229 is laterally inserted into the clamping space and can slide up and down along the clamping space. After the transplanting robot 214 and the assembling robot 202 grasp the stacked workpieces 121, in order to prevent the stacked workpieces 121 from shaking, the pressure plate 229 moves downward under the action of the third drive mechanism to press down on the stacked workpieces 121. The third drive mechanism is preferably a telescopic cylinder 230, but other types of drive mechanisms are also possible. In this embodiment, the pressure plate 229 is also fan-shaped, and its size is close to that of a single workpiece.

[0068] The circular assembly robot 202 is also equipped with a drive cylinder 228, which can make the two sets of clamping arms 226 move closer or further apart to clamp or release stacked workpieces or end pieces.

[0069] When the clamping arm 226 and the clamping hook 227 move the stacked workpiece 121 downwards, the height of the positioning post 223 is generally higher than that of the ring body 207. The positioning post 223 first enters the stator slot 130. When the clamping arm 226 and the clamping hook 227 abut against the upper end of the ring body 207 or not, the two sets of clamping arms 226 move away from each other, causing the stacked workpiece 121 or end piece 110 to disengage from the support of the clamping hook 227. The stacked workpiece 121 and end piece 110 can then move downwards along the positioning post 223 and be placed on the rotating indexing plate 201. The micro-motion cylinder 228 is the same as the prior art and will not be described in detail here.

[0070] When the stamping die presses the stacked workpiece 121, the receiving rod 215 moves upward under the action of its corresponding second cylinder 219 and receives the stacked workpiece 121 at the exit of the stamping die. Then, the receiving rod 215 moves downward under the action of the second cylinder 219. When the receiving rod 215 is below the moving tray 216, the stacked workpiece 121 is placed on the moving tray 216. A pair of grippers 220 approach each other to tidy up the stacked workpiece 121, making the perimeter of the stacked workpiece 121 neat. Then, it is transferred to the weighing station by the moving tray 216. The first cylinder 211 drives the first support plate 208, the weighing sensor 209, and the push rod 210 to move upward until the push rod 210 passes through the second through hole 218 and lifts the stacked workpiece 121. 1. The weighing sensor 209 weighs the stacked workpiece 121, and the weight of the stacked workpiece 121 is adjusted by the addition and subtraction mechanism. When the weight of the stacked workpiece 121 equals the set value, the transfer robot 214 transfers the stacked workpiece 211 to the first storage station 204. At this time, the rotary indexing plate 201 is located at the assembly station. The assembly robot 203 picks up the end piece 110 from the second storage station 205 and places it on the rotary indexing plate 201. At this time, the assembly robot 205 picks up multiple end pieces 110. After the end pieces 110 are placed, the rotary indexing plate 201 moves to the rounding station. The rounding robot 202 picks up the stacked workpiece 1211 from the first storage station 204 and places it on the rotary indexing plate 201. After a stack of workpieces 121 is placed on the rotating indexing plate 201, the rotating indexing plate 201 rotates at a certain angle in a certain direction to allow subsequent stacked workpieces 121 to be placed and spliced ​​with the previous stacked workpieces 121. When multiple stacked workpieces 121 are spliced ​​into a ring 120, the rotating indexing plate 201 automatically adjusts its rotation angle so that subsequent stacked workpieces 121 can continue to be spliced ​​into another ring 120. The rotation angle at this time is different from the rotation angle of the previous layer, so that the splicing points between the stacked workpieces 121 of adjacent ring 120 are not located on the same vertical line. That is, the splicing points between the splicing grooves 122 and splicing blocks 123 on adjacent ring 120s are staggered. This setting can improve the efficiency between adjacent rings 120. To improve support performance and strength, after assembling a circular ring 120, the indexing plate 201 can be rotated and moved to the assembly station to assemble the end pieces. The end pieces can be single or multiple, depending on the program adjustments required. After the ring is assembled, the indexing plate 201 moves to the assembly station to assemble the end pieces, ensuring that both ends of the stator core are end pieces 110. Preferably, the end pieces 110 at both ends of the stator core are multi-layered. Then, the indexing plate 201 is transferred to the pre-pressing station, and the pre-pressing plate 225 moves downwards. The number of end pieces at the stator core ends is adjusted according to the downward movement distance. After pre-pressing, the stator core 100 is conveyed out of the pre-pressing station, and manually transferred to the next processing step.Of course, the stator core 100 can also be directly transferred from the pre-pressing station to the next processing equipment for direct processing.

[0071] This utility model has been described through several specific embodiments. Those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or circumstances without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

Claims

1. A material receiving and transfer device, characterized in that, It includes a receiving mechanism and a transfer mechanism. The transfer mechanism includes a movable pallet, and the receiving mechanism includes a receiving rod that can move up and down to receive the stacked workpieces stamped by the stamping die and place the received stacked workpieces on the movable pallet.

2. The material receiving and transfer device according to claim 1, characterized in that, The movable tray is provided with a first through hole, which is adapted to the receiving rod, and the receiving rod can pass through the first through hole vertically.

3. The material receiving and transfer device according to claim 2, characterized in that, The mobile tray is equipped with a sorting mechanism, which includes a pair of grippers that can move closer or further apart from each other, forming a sorting space between the grippers. Rollers are provided on both sides of one gripper, and the rollers are located within the sorting space. The first perforation is opposite to the sorting space.

4. The material receiving and transfer device according to claim 3, characterized in that, The movable pallet can slide to the weighing station. The receiving and transfer device also includes a weighing mechanism and a piece-adding / reducing mechanism. The weighing mechanism is used to weigh the stacked workpieces located at the weighing station. The piece-adding / reducing mechanism includes a piece-adding / reducing robot. When the weight of the stacked workpieces weighed by the weighing mechanism is greater than the weight set value, the piece-adding / reducing robot transfers the single workpieces on the stacked workpieces to the third storage station until the weight of the stacked workpieces at the weighing station equals the weight set value. When the weight of the stacked workpieces weighed by the weighing mechanism is less than the weight set value, the piece-adding / reducing robot transfers the single workpieces on the third storage station to the stacked workpieces on the weighing station until the weight of the stacked workpieces on the weighing station equals the weight set value. When the weight of the stacked workpieces weighed by the weighing mechanism equals the weight set value, the transfer robot transfers the stacked workpieces on the weighing station to the first storage station.

5. The material receiving and transfer device according to claim 4, characterized in that, The weighing mechanism includes a first driving mechanism, a first support plate, a weighing sensor mounted on the first support plate, and a top rod mounted on the weighing sensor. The first driving mechanism can drive the first support plate, the weighing sensor, and the top rod to move up and down together. When the top rod moves upward, it can lift the stacked workpiece located at the weighing station upward, and the weighing sensor weighs the stacked workpiece.

6. The material receiving and transfer device according to claim 5, characterized in that, The movable tray is provided with a second through hole, which is adapted to the top rod. The top rod can pass through the second through hole from bottom to top to lift the corresponding stacked workpieces. The second through hole corresponds to the sorting space.

7. The material receiving and transfer device according to claim 4, characterized in that, The addition / subtraction robot includes a third support plate that can be raised and lowered. The third support plate is provided with a plurality of second suction nozzles, which can be used to pick up single pieces of workpieces. The third support plate can drive the second suction nozzles to rise and fall together.

8. The material receiving and transfer device according to claim 7, characterized in that, The addition / subtraction robot includes two sets of guide rods, with a guide space formed between the two sets of guide rods, and the third support plate can move up and down along the guide space.

9. The material receiving and transfer device according to claim 4, characterized in that, The transplanting robot includes two sets of clamping arms. The lower end of each clamping arm is provided with a clamping hook. The clamping hooks of the two sets of clamping arms are arranged opposite each other. The two sets of clamping arms can move closer to each other or further away from each other. A clamping space is formed between the two sets of clamping arms. When the clamping hooks move closer to each other as the two sets of clamping arms move closer to each other, the clamping hooks are used to clamp the stacked workpieces.

10. The material receiving and transfer device according to claim 9, characterized in that, The clamping space is equipped with a pressure plate that can be raised and lowered.

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