A continuous production line for new energy motor shafts without intermediate annealing

Abstract

This invention provides a continuous production line for new energy motor shafts without intermediate annealing, belonging to the field of new energy motor shaft production technology. It includes a base, a conveyor belt mounted on top of the base, and a placement mechanism on the surface of the conveyor belt. A cold forging mechanism and a pushing mechanism are respectively located at the front and rear ends of the left side of the conveyor belt, and a second cold forging mechanism and a second pushing mechanism are respectively located at the front and rear ends of the right side of the conveyor belt. The placement mechanism includes a fixing block mounted on the surface of the conveyor belt. A side mounting plate is located on the left side of the fixing block, and a threaded rod is rotatably mounted on the upper end of the side mounting plate. A gear is provided on the circumferential surface of the lower end of the threaded rod. Through this placement mechanism, during the cold forging process of the motor shaft, when the blank is moved into or out of the cold forging mechanism, the placement mechanism will not contact the pushing block, thus affecting the feeding operation and enabling continuous production of the motor shaft with higher efficiency.

Description

Technical Field

[0001] This invention belongs to the field of new energy motor shaft production technology, specifically a continuous production line for new energy motor shafts without intermediate annealing. Background Technology

[0002] The new energy motor shaft is an important component in new energy motors, serving as the link for electromechanical energy conversion between the new energy motor and the equipment.

[0003] Currently available motor shaft forgings are all designed without holes in the middle, which has the following disadvantages: the blank part generates a lot of waste after deep hole machining, resulting in low material utilization and low production efficiency; deep hole machining equipment is expensive, and deep hole machining causes a large amount of tool wear, further increasing production costs.

[0004] Therefore, we propose a continuous production line for new energy motor shafts that does not undergo intermediate annealing to solve the problems encountered above. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing motor shaft forgings, which are all designed without intermediate holes. These shortcomings include: the blanks generate a large amount of waste during deep hole machining, resulting in low material utilization and low production efficiency; the deep hole machining equipment is expensive, and the wear and tear on the cutting tools is significant, further increasing production costs. Therefore, this invention proposes a continuous production line for new energy motor shafts that does not require intermediate annealing.

[0006] The objective of this invention can be achieved through the following technical solution: including a base, a conveyor belt is provided above the base, a placement mechanism is provided on the surface of the conveyor belt, a cold forging mechanism one and a pushing mechanism one are respectively provided at the front and rear ends of the left side of the conveyor belt, and a cold forging mechanism two and a pushing mechanism two are respectively provided at the front and rear ends of the right side of the conveyor belt.

[0007] The placement mechanism includes a fixed block, which is set on the surface of the conveyor belt. A side mounting plate is set on the left side of the fixed block. A threaded rod is rotatably mounted on the upper end of the side mounting plate. A gear is set on the circumferential surface of the lower end of the threaded rod. A lifting block is threadedly connected to the circumferential surface of the upper end of the threaded rod. A lifting placement platform is set on the right side of the lifting block. A motor shaft is placed inside the upper end of the lifting placement platform.

[0008] In a preferred embodiment of the present invention, a U-shaped fixing plate is provided on the upper surface of the side mounting plate, the upper end of the threaded rod is rotatably mounted inside the upper end of the U-shaped fixing plate, a positioning rod is provided inside the front end of the U-shaped fixing plate, and the front end of the lifting block is sleeved on the circumferential surface of the positioning rod.

[0009] In a preferred embodiment of the present invention, the cold forging mechanism includes a hollow support platform, and two hollow support platforms are provided. Each of the two hollow support platforms has a processing table at its upper end, and each of the two processing tables has an outer forming groove at its rear end. A movable push rod is movably installed inside the left outer forming groove, and a hollow push rod is movably installed inside the right outer forming groove. The hollow push rod has an opening column inside, and the front end of the opening column is connected to the front end of the right processing table.

[0010] In a preferred embodiment of the present invention, the pushing mechanism includes a hydraulic cylinder, and there are two hydraulic cylinders. The two hydraulic cylinders are respectively located behind the two processing tables. The front end of each of the two hydraulic cylinders is provided with a push block. The circumferential surface of the telescopic end of each of the two hydraulic cylinders is provided with a U-shaped telescopic connecting plate. The front end of the two U-shaped telescopic connecting plates is respectively connected to the rear end of the movable push rod and the rear end of the hollow push rod. The left side wall of each of the two push blocks is provided with a toothed plate, and the height and teeth of the toothed plate are matched with gears.

[0011] In a preferred embodiment of the present invention, each of the two processing tables is provided with a movable slot and a moving slot, and the lower end of the front of the movable slot is connected to the upper end of the moving slot. The movable push rod and the hollow push rod are respectively disposed inside the two movable slots, and the front ends of the two U-shaped telescopic connecting plates are respectively disposed inside the two moving slots.

[0012] In a preferred embodiment of the present invention, the cold forging mechanism 2 includes a hollow support platform 2, and two hollow support platforms 2 are provided. Each of the two hollow support platforms 2 has a processing table 2 at its upper end. The front end of the left processing table 2 has an outer forming groove 2 inside, and a movable push rod 2 is movably installed inside the outer forming groove 2. The front end of the right processing table 2 has an annular groove inside, and a hollow annular push rod 1 is movably installed inside the annular groove. A forming extrusion block is provided at the center of the rear end of the annular groove.

[0013] In a preferred embodiment of the present invention, the pushing mechanism 2 includes a hydraulic cylinder 2, and two hydraulic cylinders 2 are provided. The two hydraulic cylinders 2 are respectively located in front of the two processing tables 2. The rear end of each of the two hydraulic cylinders 2 is provided with a push block 2. The rear side of each of the two push blocks 2 is provided with a hollow annular push rod 2 and a solid cylindrical push rod, and the solid cylindrical push rod is located inside the hollow annular push rod 2. The rear end of the left side of each of the two hollow annular push rods 2 is provided with a toothed plate 2, and the height and teeth of the toothed plate 2 are matched with gears.

[0014] In a preferred embodiment of the present invention, a limiting platform is provided on the rear side of each of the two hydraulic cylinders 2. Two sets of hollow annular push rods 2 are movably installed inside the upper end of the two limiting platforms. A movable groove 3 is provided inside the two limiting platforms. An L-shaped connecting plate is movably installed inside the two movable grooves 3. The front ends of the two L-shaped connecting plates are fixedly connected to the lower ends of the two push blocks 2. A vertical connecting plate is inserted into the rear end of the two L-shaped connecting plates. The upper ends of the two vertical connecting plates are fixedly connected to the lower ends of the movable push rod 2 and the lower ends of the hollow annular push rod 1, respectively. Push blocks 3 are provided in the middle and rear ends of the two L-shaped connecting plates. The two push blocks 3 abut against the rear side of the lower end of the two vertical connecting plates, respectively.

[0015] In a preferred embodiment of the present invention, the interior of the left processing table 2 is provided with a movable groove 2, and the interior of both processing tables 2 is provided with a movable groove 2. The lower end of the movable groove 2 is connected to the left movable groove 2, and the lower end of the annular groove is connected to the right movable groove 2. The upper ends of the two vertical connecting plates are respectively disposed inside the two movable grooves 2.

[0016] In a preferred embodiment of the present invention, the outer surface of the front end of the motor shaft is provided with an outer forming surface one, the interior of the front end of the motor shaft is provided with a deep hole, the outer surface of the rear end of the motor shaft is provided with an outer forming surface two, and the interior of the rear end of the motor shaft is provided with a connecting hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) By setting up the placement mechanism, during the cold forging process of the motor shaft, when the blank is being moved into or out of the cold forging mechanism, the placement mechanism will not come into contact with the push block, thus affecting the feeding work, so that the motor shaft can be continuously produced with higher efficiency.

[0019] (2) By setting up cold forging mechanism one and cold forging mechanism two, the deep hole of the motor shaft is extruded and formed. The motor shaft is extruded and formed by material flow, thereby ensuring the integrity of the internal metal flow line of the product, realizing the full flow of material, reducing the use of raw materials, and the product is produced continuously without annealing. Each section of the product is forged and formed in sections. After forging, the product can meet the usage requirements without heat treatment.

[0020] (3) By setting push mechanism one and push mechanism two, after the motor shaft is forged in sections, the motor shaft can be pushed out of the cold forging mechanism at the same time when the hydraulic cylinder is reset, thus ensuring continuous production of products. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a perspective view of the present invention.

[0024] Figure 3 This is a left sectional perspective view of the present invention;

[0025] Figure 4 This is a right sectional perspective view of the present invention;

[0026] Figure 5 This is a first top sectional perspective view of the present invention;

[0027] Figure 6 This is a second top sectional perspective view of the present invention;

[0028] Figure 7 This is a cross-sectional view of the finished motor shaft of the present invention.

[0029] In the diagram: 1. Base; 2. Conveyor belt; 3. Placement mechanism; 301. Fixing block; 302. Side mounting plate; 303. Threaded rod; 304. Gear; 305. Lifting block; 306. Lifting placement platform; 307. U-shaped fixing plate; 308. Positioning rod; 4. Motor shaft; 401. Outer forming surface one; 402. Deep hole; 403. Outer forming surface two; 404. Connecting hole; 5. Cold forging mechanism one; 501. Hollow support platform one; 502. Machining table one; 503. Outer forming groove one; 504. Movable push rod one; 505. Movable groove one; 506. Moving groove one; 507. Hollow push rod; 508. Opening column; 6. Pushing mechanism one; 601. Hydraulic 602. Cylinder 1; 603. Push Block 1; 604. U-shaped Telescopic Connecting Plate; 605. Tooth Plate 1; 7. Cold Forging Mechanism 2; 706. Hollow Support Platform 2; 707. Machining Table 2; 708. External Forming Groove 2; 709. Movable Push Rod 2; 700. Movable Groove 2; 700. Moving Groove 2; 701. Annular Groove; 702. Hollow Annular Push Rod 1; 703. Forming Extrusion Block; 8. Pushing Mechanism 2; 804. Hydraulic Cylinder 2; 805. Push Block 2; 806. Hollow Annular Push Rod 2; 807. Solid Cylindrical Push Rod; 808. L-shaped Connecting Plate; 809. Moving Groove 3; 800. Push Block 3; 800. Vertical Connecting Plate; 801. Tooth Plate 2; 810. Restricting Platform. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0031] Please see Figure 1 - Figure 7 As shown, a continuous production line for non-annealing of the middle of a new energy motor shaft includes a base 1, a conveyor belt 2 is arranged above the base 1, a placement mechanism 3 is arranged on the surface of the conveyor belt 2, a cold forging mechanism 5 and a pushing mechanism 6 are respectively arranged at the front and rear ends of the left side of the conveyor belt 2, and a cold forging mechanism 7 and a pushing mechanism 8 are respectively arranged at the front and rear ends of the right side of the conveyor belt 2.

[0032] The placement mechanism 3 includes a fixing block 301, which is disposed on the surface of the conveyor belt 2. A side mounting plate 302 is disposed on the left side of the fixing block 301. A threaded rod 303 is rotatably mounted on the upper end of the side mounting plate 302. A gear 304 is disposed on the circumferential surface of the lower end of the threaded rod 303. A lifting block 305 is threadedly connected to the circumferential surface of the upper end of the threaded rod 303. A lifting placement platform 306 is disposed on the right side of the lifting block 305. A motor shaft 4 is disposed inside the upper end of the lifting placement platform 306. A U-shaped fixing plate 307 is disposed on the upper surface of the side mounting plate 302. The threaded rod 304... The upper end of 3 is rotatably installed inside the upper end of the U-shaped fixing plate 307. The front end of the U-shaped fixing plate 307 is provided with a positioning rod 308. The U-shaped fixing plate 307 provides installation space for the threaded rod 303 and the positioning rod 308, so that the threaded rod 303 and the positioning rod 308 are stably installed on the side mounting plate 302. The front end of the lifting block 305 is sleeved on the circumferential surface of the positioning rod 308. The positioning rod 308 can limit the lifting block 305 while allowing the lifting block 305 to move vertically on the threaded rod 303 when the threaded rod 303 rotates.

[0033] The cold forging mechanism 5 includes two hollow support platforms 501. Each of the two hollow support platforms 501 has a processing table 502 at its upper end. Each processing table 502 has an outer forming groove 503 at its rear end. The outer forming groove 503 allows the front end of the motor shaft 4 to be inserted into the outer forming groove 503, limiting the movement of the motor shaft 4 and preventing it from shifting during forward and backward pushing, thus affecting the cold forging effect. A movable push rod 504 is movably installed inside the left outer forming groove 503, and a hollow push rod 50 is movably installed inside the right outer forming groove 503. 7. The hollow push rod 507 has an opening post 508 inside, and the front end of the opening post 508 is connected to the front end of the right processing table 502. The setting of the movable push rod 504 and the hollow push rod 507 can prevent the motor shaft 4 from being affected when it enters the processing table 502 for cold forging. After the cold forging is completed, the motor shaft 4 can be pushed out of the processing table 502 by the movable push rod 504 and the hollow push rod 507. The setting of the opening post 508 makes the front end of the motor shaft 4 contact the opening post 508 under the push of the pushing mechanism 6, thereby opening the front end of the motor shaft 4.

[0034] The pushing mechanism 6 includes two hydraulic cylinders 601, each positioned directly behind a processing table 502. Each cylinder 601 has a push block 602 at its front end. U-shaped telescopic connecting plates 603 are provided on the circumferential surface of the telescopic ends of both cylinders 601. The U-shaped telescopic connecting plates 603 ensure that the front ends of the connecting plates do not move synchronously forward or backward initially when the cylinders 601 extend or retract; they only move forward or backward to their maximum extension limit. It can move horizontally back and forth. The front ends of the two U-shaped telescopic connecting plates 603 are connected to the rear ends of the movable push rod 504 and the hollow push rod 507, respectively. The left side wall of the two push blocks 602 is provided with toothed plates 604, and the height and teeth of the toothed plates 604 are matched with the gear 304. When the hydraulic cylinder 601 drives the toothed plates 604 to move horizontally back and forth, the toothed plates 604 drive the gear 304 and the threaded rod 303 to rotate, and then smoothly drive the lifting block 305 and the lifting platform 306 to move vertically.

[0035] Both processing tables 502 have movable slots 505 and sliding slots 506 inside. The lower front end of the movable slot 505 is connected to the upper part of the sliding slot 506. Movable push rod 504 and hollow push rod 507 are respectively set inside the two movable slots 505. The front ends of the two U-shaped telescopic connecting plates 603 are respectively set inside the two sliding slots 506. The arrangement of the movable slots 505 and sliding slots 506 provides movement space for the front ends of the movable push rod 504, hollow push rod 507 and U-shaped telescopic connecting plate 603, so that the movable push rod 504, hollow push rod 507 and U-shaped telescopic connecting plate 603 can move smoothly back and forth horizontally. Example 2

[0036] Please refer to the following: Figure 4 and Figure 6As shown, the cold forging mechanism 2 7 includes a hollow support platform 2 701, and there are two hollow support platforms 2 701. Each of the two hollow support platforms 2 701 has a processing table 2 702 at its upper end. The front end of the left processing table 2 702 has an outer forming groove 2 703. The outer forming groove 2 703 allows the rear end of the motor shaft 4 to be inserted into the outer forming groove 2 703, limiting the movement of the motor shaft 4 while preventing it from shifting during forward and backward pushing, thus affecting the cold forging effect. A movable component is movably installed inside the outer forming groove 2 703. Push rod 2 704, the front end of the right processing table 2 702 has an annular groove 707, and a hollow annular push rod 1 708 is movably installed inside the annular groove 707. The arrangement of the movable push rod 2 704 and the hollow annular push rod 1 708 can push the rear end of the motor shaft 4 out of the processing table 2 702 by the movable push rod 2 704 or the hollow annular push rod 1 708 without affecting the entry of the motor shaft 4 into the processing table 2 702. After the cold forging of the motor shaft 4 is completed, a forming extrusion block 709 is provided at the center of the rear end of the annular groove 707.

[0037] The pushing mechanism 28 includes two hydraulic cylinders 2801, which are respectively positioned in front of the two processing tables 2702. Each hydraulic cylinder 2801 has a push block 2802 at its rear end. A hollow annular push rod 2803 and a solid cylindrical push rod 804 are located on the rear side of each push block 2802, with the solid cylindrical push rod 804 located inside the hollow annular push rod 2803. A toothed plate 2809 is located on the left rear end of each of the two hollow annular push rods 2803, with the height and teeth of the toothed plate 2809 matching the gear 304. The toothed plate 2809 allows the gear 304 to rotate as the hollow annular push rod 2803 moves back and forth, thus enabling the lifting and placing platform 306 to move vertically smoothly. A limiting platform 810 is located on the rear side of each of the two hydraulic cylinders 2801. Hollow annular push rod 2 803 is movably installed inside the upper end of two limiting platforms 810. Each of the two limiting platforms 810 has a moving groove 3 806 inside. Each of the two moving grooves 3 806 has an L-shaped connecting plate 805 movably installed inside. The moving groove 3 806 provides space for the L-shaped connecting plate 805 to move smoothly back and forth horizontally. The front ends of the two L-shaped connecting plates 805 are fixedly connected to the lower ends of the two push blocks 2 802 respectively. The rear ends of the two L-shaped connecting plates 805 are each inserted with a vertical connecting plate 808. The upper ends of the two vertical connecting plates 808 are fixedly connected to the lower ends of the movable push rod 2 704 and the hollow annular push rod 1 708 respectively. Push blocks 3 807 are provided in the middle and rear ends of the two L-shaped connecting plates 805. The two push blocks 3 807 abut against the rear side of the lower end of the two vertical connecting plates 808 respectively.

[0038] It should be noted that the hollow annular push rod 2 803 can completely wrap around the front end of the motor shaft 4, and after the rear end of the hollow annular push rod 2 803 abuts against the rear surface of the motor shaft 4, it can drive the motor shaft 4 to move backward, so that the rear side of the motor shaft 4 moves into the outer forming groove 2 703 and abuts against the front end of the movable push rod 2 704. At the same time, the front push block 3 807 abuts against the vertical connecting plate 808. At this time, the hollow annular push rod 2 803 continues to push the motor shaft 4 backward into the processing table 2 702, and the front push block 3 807 can push the vertical connecting plate 808 and the movable push rod 2 704 to move backward.

[0039] The left processing table 702 has a movable groove 705 inside, and both processing tables 702 have a movable groove 706 inside. The lower end of the movable groove 705 is connected to the left movable groove 706, and the lower end of the annular groove 707 is connected to the right movable groove 706. The upper ends of the two vertical connecting plates 808 are respectively set inside the two movable grooves 706. The movable grooves 705 and the movable grooves 706 provide space for the movable push rod 704 and the vertical connecting plate 808 to move smoothly back and forth horizontally.

[0040] The outer surface of the front end of the motor shaft 4 is provided with an outer forming surface 401, which is cold-forged by a left-end machining table 502. A deep hole 402 is formed inside the front end of the motor shaft 4 by a right-end machining table 502. The outer surface of the rear end of the motor shaft 4 is provided with an outer forming surface 403, which is cold-forged by a left-end machining table 702. A connecting hole 404 is formed inside the rear end of the motor shaft 4 by a right-end machining table 702. The forming extrusion block 709 inside 02 is cold forged. The center of the right processing table 502, the center of the right hydraulic cylinder 601, the center of the two sets of processing tables 702, and the center of the two sets of limiting tables 810 are all set at the same height. They are lower than the center of the leftmost processing table 502 and the center of the hydraulic cylinder 601. The difference in height is the radius difference between the outer forming surface 401 of the motor shaft 4 and the blank motor shaft 4 after the motor shaft 4 is cold forged inside the leftmost processing table 502.

[0041] In use, the blank shaft of the motor shaft 4 is first placed on the lifting platform 306. Then, the conveyor belt 2 is started, driving the placement mechanism 3 and the blank shaft to move to the middle of the left hollow support platform 501 and the left hydraulic cylinder 601. Then, the conveyor belt 2 stops moving, and the hydraulic cylinder 601 is started. The hydraulic cylinder 601 drives the push block 602, the U-shaped telescopic connecting plate 603, and the toothed plate 604 to move horizontally forward. The forward movement of the push block 602 can push the blank shaft in front of it forward, so that when the front end of the blank shaft is pushed into the outer forming groove 503, the U-shaped telescopic connecting plate 603 retracts to its maximum. At this time, the push block 602 continues to move forward, which can drive the U-shaped telescopic connecting plate 603 to move forward as a whole, and then drive the U-shaped telescopic connecting plate 603 to drive the movable push rod 504. The moving rod 504 moves forward, so that the rear end of the movable push rod 504 abuts against the front end of the blank shaft without affecting the movement of the blank shaft. At the same time, the toothed plate 604 moves forward and meshes with the gear 304, driving the gear 304 and the threaded rod 303 to rotate. This causes the lifting block 305 to drive the lifting platform 306 to move vertically downward, thus avoiding the lifting platform 306 being too high and affecting the horizontal forward movement of the push block 602. When the front end of the movable push rod 504 abuts against the inner wall of the processing table 502, the initial cold forging of the blank shaft is completed, and the outer forming surface 401 is cold-forged and extruded. Then, the hydraulic cylinder 601 retracts and resets, the lifting platform 306 moves upward back to its initial height, and the movable push rod 504 pushes the blank shaft to move backward out of the processing table 502 and pushes it back onto the lifting platform 306.

[0042] Then the conveyor belt 2 starts again, driving the placement mechanism 3 and the blank shaft to move to the middle of the right hollow support platform 501 and the right hydraulic cylinder 601. Then the above operation is repeated. At this time, because of the setting of the opening column 508 inside the right machining table 502, when the blank shaft enters the machining table 502 for cold forging, a deep hole 402 can be opened inside the front end of the blank shaft.

[0043] Next, conveyor belt 2 moves the placement mechanism 3 and the blank shaft to the middle of the left-end processing table 702 and the left-end hydraulic cylinder 801. Hydraulic cylinder 801 is activated, causing push block 802, hollow annular push rod 803, and L-shaped connecting plate 805 to move horizontally backward. This allows the hollow annular push rod 803 to completely enclose the front end of the motor shaft 4. Then, after the rear end of the hollow annular push rod 803 abuts against the rear surface of the motor shaft 4, it drives the motor shaft 4 to move backward, causing the rear side of the motor shaft 4 to move into the outer forming groove 703 and abut against the front end of the movable push rod 704. Simultaneously, the front push block 807 abuts against the vertical connecting plate 808. At this time, the hollow annular push rod 803 continues... After the motor shaft 4 is pushed backward into the processing table 702, the front push block 807 can push the vertical connecting plate 808 and the movable push rod 704 backward. Through the setting of the movable groove 705, the outer surface of the rear end of the blank shaft is cold-forged to form the outer forming surface 403. Then the hydraulic cylinder 801 retracts, first driving the push block 802, the hollow ring push rod 803 and the L-shaped connecting plate 805 to move horizontally backward, so that the hollow ring push rod 803 is moved out of the blank shaft as a whole. Then, after the rear push block 807 abuts against the vertical connecting plate 808, it drives the vertical connecting plate 808 and the movable push rod 704 to move forward, thereby pushing the blank shaft out of the processing table 702 and pushing it onto the lifting and placing table 306.

[0044] Next, the conveyor belt 2 moves the placement mechanism 3 and the blank shaft to the middle of the right end processing table 702 and the right end hydraulic cylinder 801, repeating the work of the hydraulic cylinder 801. Then, the forming extrusion block 709 set inside the right end processing table 702 opens the connecting hole 404 inside the rear end of the blank shaft, thereby completing the non-annealing continuous production of the motor shaft 4.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous production line for non-annealing intermediate shafts of new energy motors, comprising a base (1), characterized in that, A conveyor belt (2) is provided above the base (1), and a placement mechanism (3) is provided on the surface of the conveyor belt (2). A cold forging mechanism (5) and a pushing mechanism (6) are respectively provided at the front and rear ends of the left side of the conveyor belt (2), and a cold forging mechanism (7) and a pushing mechanism (8) are respectively provided at the front and rear ends of the right side of the conveyor belt (2). The placement mechanism (3) includes a fixing block (301), and the fixing block (301) is disposed on the surface of the conveyor belt (2). A side mounting plate (302) is disposed on the left side of the fixing block (301). A threaded rod (303) is rotatably mounted on the upper end of the side mounting plate (302). A gear (304) is disposed on the circumferential surface of the lower end of the threaded rod (303). A lifting block (305) is threadedly connected to the circumferential surface of the upper end of the threaded rod (303). A lifting placement platform (306) is disposed on the right side of the lifting block (305). A motor shaft (4) is placed inside the upper end of the lifting placement platform (306). The outer surface of the front end of the motor shaft (4) is provided with an outer forming surface one (401), the interior of the front end of the motor shaft (4) is provided with a deep hole (402), the outer surface of the rear end of the motor shaft (4) is provided with an outer forming surface two (403), and the interior of the rear end of the motor shaft (4) is provided with a connecting hole (404). The upper surface of the side mounting plate (302) is provided with a U-shaped fixing plate (307), the upper end of the threaded rod (303) is rotatably installed inside the upper end of the U-shaped fixing plate (307), a positioning rod (308) is provided inside the front end of the U-shaped fixing plate (307), and the front end of the lifting block (305) is sleeved on the circumferential surface of the positioning rod (308). The cold forging mechanism 1 (5) includes a hollow support platform 1 (501), and there are two hollow support platforms 1 (501). The upper end of each of the two hollow support platforms 1 (501) is provided with a processing table 1 (502). The rear end of each of the two processing tables 1 (502) is provided with an outer forming groove 1 (503). The outer forming groove 1 (503) on the left side is movably installed with a movable push rod 1 (504). The outer forming groove 1 (503) on the right side is movably installed with a hollow push rod 507. The hollow push rod 507 is provided with an opening column 508 inside. The front end of the opening column 508 is connected to the front end of the processing table 1 (502) on the right side. The pushing mechanism 1 (6) includes a hydraulic cylinder 1 (601), and there are two hydraulic cylinders 1 (601). The two hydraulic cylinders 1 (601) are respectively located behind the two processing tables 1 (502). The front end of each of the two hydraulic cylinders 1 (601) is provided with a push block 1 (602). The circumferential surface of the telescopic end of each of the two hydraulic cylinders 1 (601) is provided with a U-shaped telescopic connecting plate (603). The front end of each of the two U-shaped telescopic connecting plates (603) is respectively connected to the rear end of the movable push rod 1 (504) and the rear end of the hollow push rod (507). The left side wall of each of the two push blocks 1 (602) is provided with a toothed plate 1 (604), and the height and teeth of the toothed plate 1 (604) are matched with the gear (304). The interior of each of the two processing tables (502) is provided with a movable slot (505) and a moving slot (506), and the lower end of the front of the movable slot (505) is connected to the upper part of the moving slot (506). The movable push rod (504) and the hollow push rod (507) are respectively arranged inside the two movable slots (505), and the front ends of the two U-shaped telescopic connecting plates (603) are respectively arranged inside the two moving slots (506). The cold forging mechanism 2 (7) includes a hollow support platform 2 (701), and there are two hollow support platforms 2 (701). The upper end of each of the two hollow support platforms 2 (701) is provided with a processing platform 2 (702). The front end of the processing platform 2 (702) on the left is provided with an outer forming groove 2 (703). The outer forming groove 2 (703) is movably installed with a movable push rod 2 (704) inside. The front end of the processing platform 2 (702) on the right is provided with an annular groove (707). The annular groove 1 (708) is movably installed with a hollow annular push rod 1 (708) inside. A forming extrusion block (709) is provided at the center of the rear end of the annular groove (707). The second pushing mechanism (8) includes a second hydraulic cylinder (801), and there are two second hydraulic cylinders (801). The two second hydraulic cylinders (801) are respectively located in front of the two second processing tables (702). The rear ends of the two second hydraulic cylinders (801) are provided with push blocks (802). The rear sides of the two push blocks (802) are provided with a hollow annular push rod (803) and a solid cylindrical push rod (804). The solid cylindrical push rod (804) is located inside the hollow annular push rod (803). The rear ends of the left side of the two hollow annular push rods (803) are provided with toothed plates (809). The height and teeth of the toothed plates (809) are matched with the gears (304). Each of the two hydraulic cylinders (801) has a limiting platform (810) on its rear side. Two sets of hollow annular push rods (803) are movably installed inside the upper ends of the two limiting platforms (810). Each limiting platform (810) has a moving groove (806) inside. An L-shaped connecting plate (805) is movably installed inside each of the two moving grooves (806). The front ends of the two L-shaped connecting plates (805) are respectively connected to the two push blocks (802). The lower end of the two L-shaped connecting plates (805) is fixedly connected, and the rear ends of the two L-shaped connecting plates (805) are each inserted with a vertical connecting plate (808). The upper ends of the two vertical connecting plates (808) are respectively fixedly connected to the lower end of the movable push rod two (704) and the lower end of the hollow ring push rod one (708). The middle and rear ends of the two L-shaped connecting plates (805) are each provided with a push block three (807). The two push blocks three (807) respectively abut against the rear side of the lower end of the two vertical connecting plates (808). The processing table 2 (702) on the left side has a movable groove 2 (705) inside, and both processing tables 2 (702) have a movable groove 2 (706) inside. The lower end of the movable groove 2 (705) is connected to the movable groove 2 (706) on the left side, and the lower end of the annular groove (707) is connected to the movable groove 2 (706) on the right side. The upper ends of the two vertical connecting plates (808) are respectively set inside the two movable grooves 2 (706). The center of the right-side machining table 1 (502), the center of the right-side hydraulic cylinder 1 (601), the center of the two sets of machining tables 2 (702), and the center of the two sets of limiting tables (810) are all set at the same height, and are lower than the center of the leftmost machining table 1 (502) and hydraulic cylinder 1 (601). The difference in height is the radius difference between the outer forming surface 1 (401) of the motor shaft (4) and the blank motor shaft (4) after the motor shaft (4) is cold forged inside the leftmost machining table 1 (502).

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