A valve spring manufacturing apparatus

Abstract

The present application relates to valve spring polishing technical field, specifically to a kind of valve spring manufacturing device, including production equipment, the production equipment includes shell, shell is provided with wire feeding component, the wire feeding component is used to send raw material into forming shaft and rotating roller, the forming shaft and rotating roller are used to make raw material into valve spring, shell is provided with cutting knife, the cutting knife is used to cut raw material, the production equipment is provided with polishing assembly for polishing valve spring, the polishing assembly includes control slot being opened in the shell, drive motor is installed in the control slot, the drive motor is used to drive polishing plate rotation, the polishing plate is arranged between the rotating roller, and the polishing plate is used to polish the bottom of valve spring.The present application effectively solves the problem of low efficiency, unstable quality and surface damage caused by frequent transfer of semi-finished products caused by separation of production and polishing process in the prior art.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valve spring grinding, and particularly relates to a valve spring manufacturing device. BACKGROUND

[0002] The valve spring is a key component of the valve distribution system of an internal combustion engine, is usually made of high-strength spring steel into a spiral structure, and is installed between a cylinder cover and a valve rod. The main function of the valve spring is to ensure the timely closure and sealing of the valve through elastic deformation, to inhibit the vibration of the valve, and to ensure the stable operation of the valve distribution mechanism of the engine. The valve spring manufacturing needs to meet the requirements of high precision, high fatigue life and surface smoothness, and the performance of the valve spring directly affects the reliability and efficiency of the engine.

[0003] At present, the valve spring manufacturing usually adopts a split type machining process, that is, the metal wire is first transported to a forming station through a wire feeding mechanism, the wire is wound into a spiral spring by cooperation of a forming shaft and a rotating roller, and then is cut off by a cutting knife to form a semi-finished product. After the forming is completed, the valve spring needs to be transferred to an independent grinding equipment, and the end face is treated by means of a grinding wheel or a polishing tool to meet the assembly precision requirements. Although the prior art can realize the basic functions, it still relies on the cooperation of multiple equipment, and manual intervention or special conveying mechanism is needed to connect each link, resulting in the dispersion of the production process.

[0004] The split type manufacturing method has significant efficiency bottleneck and quality risk. First, the separation of the forming and grinding processes leads to the extension of the production rhythm, the frequent transfer of the semi-finished product, and the increase of the time cost. Second, the surface of the valve spring is easily scratched and the end face is deformed due to collision or positioning deviation during the transfer process, thereby reducing the product consistency. In addition, the replacement and debugging of the independent grinding equipment further aggravate the process complexity, and it is difficult to adapt to the high rhythm and integrated production demand. SUMMARY

[0005] In view of the above-mentioned defects of the prior art, the application provides a valve spring manufacturing device, which can effectively solve the problems of low efficiency, unstable quality and surface damage caused by frequent transfer of semi-finished products due to the separation of the production and grinding processes in the prior art.

[0006] To achieve the above purpose, the application is implemented by the following technical scheme:

[0007] The application provides a valve spring manufacturing device, which comprises a production equipment, the production equipment comprises a shell, a wire feeding member is arranged in the shell, the wire feeding member is used for feeding raw materials to a forming shaft and a rotating roller, the forming shaft and the rotating roller are used for manufacturing the valve spring from the raw materials, and a cutting knife is arranged in the shell and used for cutting the raw materials.

[0008] The production equipment is provided with a polishing assembly for polishing the valve spring, the polishing assembly comprises a control groove opened in the shell, a driving motor is installed in the control groove, the driving motor is used for driving the polishing plate to rotate, the polishing plate is arranged between the rotating rollers, and the polishing plate is used for polishing the bottom of the valve spring.

[0009] Preferably, the output end of the driving motor is fixedly connected with an inner shaft, the inner shaft is inserted into an outer cylinder, one side of the outer cylinder is fixedly connected with a polishing plate, one side of the polishing plate is fixedly connected with the forming shaft, a track groove is opened in the inner wall of the outer cylinder, and a track sliding block is slidably connected in the track groove and fixedly connected to the outer side wall of the inner shaft.

[0010] Preferably, the bottom of the outer cylinder is fixedly connected with a first spring, the other end of the first spring is fixedly connected to one side of a rotating ring, the rotating ring is rotatably connected in a rotating groove, the rotating groove is opened in the inner wall of the control groove, and the rotating ring is fixedly connected to the side wall of the inner shaft.

[0011] Preferably, the shell is provided with a clamping assembly, the clamping assembly comprises a clamping sliding groove, the clamping sliding groove is opened in the shell, a telescopic rod is fixedly connected in the clamping sliding groove, the output end of the telescopic rod is provided with a clamping sliding block, the clamping sliding block is slidably connected in the clamping sliding groove, and one side of the clamping sliding block is provided with the rotating roller.

[0012] Preferably, the side wall of the outer cylinder is fixedly connected with a sliding ring, the inner wall of the control groove is fixedly connected with a fixed ring, a hydraulic space is formed between the fixed ring and the sliding ring, the hydraulic space is communicated with a first channel, the other end of the first channel is communicated with the telescopic rod, the first channel is opened in the shell, and the telescopic rod, the first channel and the hydraulic space are provided with hydraulic oil.

[0013] Preferably, one side of the clamping sliding block is provided with a locking assembly, the locking assembly comprises a T-shaped rod, one end of the T-shaped rod is fixedly connected to one side of the clamping sliding block, the other end of the T-shaped rod is rotatably connected in a T-shaped groove, and the T-shaped groove is opened in the rotating roller.

[0014] Preferably, a locking groove is opened in the T-shaped rod, a locking tooth rod is slidably connected in the locking groove, one end of the locking tooth rod is inserted into a tooth groove, and the tooth groove is opened in the rotating roller.

[0015] Preferably, a second channel and an oil groove are opened in the clamping sliding block, and a piston plate is slidably connected in the oil groove.

[0016] Preferably, the oil groove is communicated with the locking groove through the second channel, and the locking groove, the second channel and the oil groove are filled with hydraulic oil.

[0017] Preferably, the rotating roller, the clamping assembly and the locking assembly are circumferentially arranged in multiple groups around the forming shaft.

[0018] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0019] Through the integrated design of forming and polishing, the problem of process separation in traditional split processing is solved. After the valve spring is wound and formed by the forming shaft and the rotating roller and cut off by the cutting knife, it does not need to be transferred to an independent device, but can directly complete the bottom polishing through the polishing assembly in the shell, greatly shortening the production rhythm and reducing the transfer time cost of semi-finished products. At the same time, the defects such as surface scratching and end face deformation of the valve spring caused by collision and positioning deviation during the transfer process are avoided, the dimensional accuracy and surface finish consistency of the valve spring product are effectively improved, and the high-rhythm mass production demand is better met.

[0020] At the same time, through the polishing-clamping hydraulic linkage structure, stable control of the processing process is realized. When the outer cylinder slides, the hydraulic space and the first channel drive the telescopic rod, which drives multiple rotating rollers to move closer to the center, uniformly clamping the valve spring from multiple directions, avoiding the valve spring from shifting or flying out during polishing, and ensuring the polishing accuracy. The stability and buffering capacity of hydraulic transmission can prevent the valve spring from being damaged by clamping too tightly or being affected by clamping too loosely, and can adapt to the processing needs of valve springs of different specifications. In addition, the locking assembly locks the rotating roller through the hydraulic drive locking tooth rod, avoiding accidental rotation of the rotating roller during polishing, and further strengthening the processing stability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0023] Figure 2 is a schematic view of the cross-sectional structure of the present application;

[0024] Figure 3 is a schematic view of the Figure 2 is an enlarged structural schematic view of position A in the present application;

[0025] Figure 4It is the structure schematic view of the rotating roller and the lock assembly of the present application;

[0026] Figure 5 It is the structure schematic view of the present application Figure 3 It is the structure schematic view of the present application

[0027] Figure 6 It is the structure schematic view of the present application Figure 3 It is the structure schematic view of the present application

[0028] Figure 7 It is the structure schematic view of the present application

[0029] Figure 8 It is the structure schematic view of the present application

[0030] Reference signs:

[0031] 1, production equipment; 11, shell; 12, wire feeding member; 13, forming shaft; 14, rotating roller; 15, cutting knife; 2, polishing assembly; 21, control groove; 22, driving motor; 23, inner shaft; 24, outer cylinder; 25, polishing plate; 26, track groove; 27, track sliding block; 28, rotating groove; 29, rotating ring; 210, No. 1 spring; 3, clamping assembly; 31, clamping sliding groove; 32, clamping sliding block; 33, telescopic rod; 34, No. 1 passage; 35, fixed ring; 36, sliding ring; 37, hydraulic space; 4, lock assembly; 41, T-shaped groove; 42, tooth groove; 43, T-shaped rod; 44, lock groove; 45, lock tooth rod; 46, No. 2 passage; 47, oil groove; 48, piston plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The present application will be further described below in combination with the embodiments.

[0034] Embodiment: refer to Figures 1 to 8 A valve spring manufacturing device, comprising production equipment 1, the production equipment 1 comprises a shell 11, the shell 11 is provided with a wire feeding member 12, the wire feeding member 12 is used for feeding raw materials to the forming shaft 13 and the rotating roller 14, the forming shaft 13 and the rotating roller 14 are used for manufacturing the valve spring from the raw materials, the shell 11 is provided with a cutting knife 15, and the cutting knife 15 is used for cutting the raw materials.

[0035] In use, the metal wire is transported to the forming shaft 13 and the rotating roller 14 by the wire feeding member 12, and the forming of the valve spring is realized by the cooperation of the forming shaft 13 and the rotatable rotating roller 14 (specifically, the forming method of the spiral shape of the valve spring and the related structure belong to the prior art for those skilled in the art, so the present scheme does not make detailed description for the forming scheme of the spiral shape). After the forming is completed, the metal wire is cut off by the cutting knife 15 arranged above the forming shaft 13, thereby forming the semi-finished product of the valve spring. At the same time of cutting, the valve spring is clamped by the clamping assembly 3, and the bottom of the valve spring is polished by the polishing assembly 2, thereby completing the preparation of the valve spring.

[0036] The production equipment 1 is provided with the polishing assembly 2 for polishing the valve spring. The polishing assembly 2 comprises a control groove 21 opened in the shell 11, and a driving motor 22 is installed in the control groove 21. The driving motor 22 is used to drive the polishing plate 25 to rotate. The polishing plate 25 is arranged between the rotating rollers 14 and is used to polish the bottom of the valve spring.

[0037] The output end of the driving motor 22 is fixedly connected with an inner shaft 23. The inner shaft 23 is inserted into an outer cylinder 24. One side of the outer cylinder 24 is fixedly connected with the polishing plate 25. One side of the polishing plate 25 is fixedly connected with the forming shaft 13. The inner wall of the outer cylinder 24 is provided with a track groove 26. The track groove 26 is slidably connected with a track sliding block 27. The track sliding block 27 is fixedly connected to the outer side wall of the inner shaft 23.

[0038] The bottom of the outer cylinder 24 is fixedly connected with a first spring 210. The other end of the first spring 210 is fixedly connected to one side of a rotating ring 29. The rotating ring 29 is rotatably connected in a rotating groove 28. The rotating groove 28 is opened in the inner wall of the control groove 21. The rotating ring 29 is fixedly connected to the side wall of the inner shaft 23.

[0039] Specifically, after the valve spring is formed, one end of the valve spring is polished by the polishing assembly 2. The inner shaft 23 fixedly connected to the output end of the driving motor 22 starts to rotate with the start of the driving motor 22. At this time, since the track groove 26 and the track sliding block 27 are arranged between the inner shaft 23 and the outer cylinder 24, the outer cylinder 24 slides outward with the rotation of the inner shaft 23 until the track sliding block 27 slides to the end of the track groove 26. At this time, the outer cylinder 24 rotates with the rotation of the inner shaft 23. Meanwhile, the polishing plate 25 fixedly connected to one side of the outer cylinder 24 rotates synchronously. In this process, the outer cylinder 24 slides outward, so that the polishing plate 25 is in contact with the bottom of the valve spring. The rotation of the polishing plate 25 realizes the polishing of the end of the valve spring.

[0040] This design realizes the integration of "forming-polishing", effectively solving the pain points of traditional split processing. On the one hand, the valve spring can be polished immediately after forming without transfer, greatly shortening the production rhythm, reducing defects such as surface scratches and end face deformation caused by collision and positioning deviation during the transfer process of semi-finished products, and improving product consistency.

[0041] The separation and contact of the polishing plate 25 and the valve spring avoids the influence of the position of the polishing plate 25 on the manufacturing of the valve spring during the manufacturing process. At the same time, this sliding design can effectively ensure the mutual friction of the polishing plate 25 and the valve spring, thereby ensuring the polishing effect.

[0042] The design of the rotating ring 29 and the first spring 210 ensures that the driving motor 22 stops running and the inner shaft 23 loses power after polishing is completed. At this time, the outer cylinder 24 is pulled back to the original position through the reset function of the first spring 210, to ensure the next polishing production. At the same time, the entire assembly is integrated in the shell 11, the structure is compact, the equipment occupied space is reduced, the process complexity of multi-device cooperation is reduced, and it is more suitable for high-rhythm valve spring mass production requirements.

[0043] The shell 11 is provided with a clamping assembly 3, the clamping assembly 3 includes a clamping sliding groove 31, the clamping sliding groove 31 is opened in the shell 11, the clamping sliding groove 31 is fixedly connected with a telescopic rod 33, the output end of the telescopic rod 33 is provided with a clamping sliding block 32, the clamping sliding block 32 is slidingly connected in the clamping sliding groove 31, and one side of the clamping sliding block 32 is provided with a rotating roller 14.

[0044] The side wall of the outer cylinder 24 is fixedly connected with a sliding ring 36, the inner wall of the control groove 21 is fixedly connected with a fixed ring 35, the fixed ring 35 and the sliding ring 36 form a hydraulic space 37 therebetween, the hydraulic space 37 is communicated with a first channel 34, the other end of the first channel 34 is communicated with the telescopic rod 33, the first channel 34 is opened in the shell 11, and the telescopic rod 33, the first channel 34 and the hydraulic space 37 are provided with hydraulic oil.

[0045] Specifically, the fixed ring 35 and the sliding ring 36 are provided with sealing structures in the hydraulic space 37 to ensure the stability of the hydraulic process. In order to ensure the stability of the polishing process, the stability of the valve spring needs to be ensured during the polishing process. Avoiding the valve spring flying out during the polishing process, with the sliding of the outer cylinder 24, the sliding ring 36 fixedly connected to the side wall of the outer cylinder 24 slides into the fixed ring 35 fixedly connected to the inner wall of the control groove 21, thereby extruding the space in the hydraulic space 37. The hydraulic oil filled in the hydraulic space 37 is delivered to the telescopic rod 33 through the first channel 34, thereby driving the clamping slide block 32 connected to the top of the telescopic rod 33 to slide, thereby driving the rotating roller 14 on which the valve spring is placed to slide inward. The rotating roller 14 is circumferentially provided with multiple groups, so that the valve spring is subjected to extrusion force in multiple directions, thereby achieving clamping effect.

[0046] This design realizes "polishing-clamping" linkage control and high-precision adjustment, greatly improving production stability and adaptability. With the characteristics of hydraulic transmission, the hydraulic oil transmits pressure smoothly and responds quickly, which can convert the displacement change of the outer cylinder 24 into precise adjustment of the rotating roller 14, ensuring that the clamping force of the rotating roller 14 on the valve spring is uniform, avoiding the valve spring from deviating due to loose clamping, insufficient forming precision, or damage to the valve spring due to tight clamping; on the other hand, the clamping assembly 3 and the polishing assembly 2 are associated through the hydraulic structure, without the need for additional independent driving components, simplifying the overall structure of the device and reducing the control complexity of multiple components working together; and the design of the clamping slide block 32 sliding along the clamping slide groove 31 ensures the linear precision of the rotating roller 14 during adjustment, further improving the matching precision of the forming shaft 13 and the rotating roller 14, providing protection for the consistency of the valve spring helical structure, and reducing the production defect rate.

[0047] One side of the clamping slide block 32 is provided with a locking assembly 4, which includes a T-shaped rod 43. One end of the T-shaped rod 43 is fixedly connected to one side of the clamping slide block 32, and the other end of the T-shaped rod 43 is rotatably connected in the T-shaped groove 41 in the rotating roller 14.

[0048] The T-shaped rod 43 is provided with a locking groove 44, and the locking groove 44 is slidably connected with a locking tooth rod 45. One end of the locking tooth rod 45 is inserted into the tooth groove 42, and the tooth groove 42 is provided in the rotating roller 14.

[0049] The clamping slide block 32 is provided with a second channel 46 and an oil groove 47, and the oil groove 47 is slidably connected with a piston plate 48.

[0050] The oil groove 47 is communicated with the locking groove 44 through the second channel 46, and the locking groove 44, the second channel 46 and the oil groove 47 are filled with hydraulic oil.

[0051] The rotating roller 14, the clamping assembly 3 and the locking assembly 4 are circumferentially provided with multiple groups around the forming shaft 13.

[0052] Specifically, the design of the locking assembly 4 is used to lock the rotating roller 14 in rotation, avoiding the rotating roller 14 from being driven to rotate during polishing, reducing the polishing effect. When the telescopic rod 33 drives the clamping sliding block 32 to slide in the clamping sliding groove 31, it first drives the clamping sliding block 32 to slide upwards until the limit, at this time, with the continuous driving of the telescopic rod 33, the piston plate 48 continues to slide inward along the oil groove 47, with the sliding of the piston plate 48, the hydraulic oil in the oil groove 47 is extruded, so that the locking tooth rod 45 in the locking groove 44 slides outward synchronously, drives one end of the locking tooth rod 45 to be inserted into the tooth groove 42 of the rotating roller 14, at the same time, due to the insertion of the tooth block at the end of the locking tooth rod 45 and the tooth groove 42, and the rectangular design of the locking groove 44 and the locking tooth rod 45, the simple locking between the rotating roller 14 and the locking tooth rod 45 is completed, avoiding the rotating roller 14 from being driven to rotate during polishing, reducing the polishing effect.

[0053] This design effectively guarantees the forming precision of the valve spring and the convenience of equipment operation. From the reliability point of view, the mechanical locking effect is realized through the cooperation of the locking tooth rod 45 and the tooth groove 42, the rotating roller 14 is stably fixed, displacement or slipping is avoided due to vibration and stress change during polishing, the cooperation precision of the rotating roller 14 and the forming shaft 13 is ensured, the consistency of the valve spring spiral structure is ensured, and defects such as size deviation are reduced. From the flexibility point of view, the hydraulic drive unlocking mode responds quickly without complex manual operation, which is suitable for automatic production demand; at the same time, the hydraulic oil transmits pressure uniformly, which can avoid impact damage to the parts during unlocking, prolong the service life of the assembly. In addition, the locking assembly 4 is integrated between the clamping sliding block 32 and the rotating roller 14, the structure is compact, no additional equipment space is needed, and it is coordinated with the clamping assembly 3, further improving the integration and operation stability of the whole device.

[0054] The working principle of the present application is as follows:

[0055] First, the metal wire is fed to the forming shaft 13 and the rotating roller 14 by the wire feeding member 12, and the wire is wound into a spiral valve spring semi-finished product (specifically, the forming method of the spiral shape of the valve spring and the related structure belong to the prior art for those skilled in the art, so the forming method of the spiral shape is not described in detail in this scheme). Then, the wire is cut off by the cutting knife 15. During polishing, the driving motor 22 drives the inner shaft 23 to rotate. The inner shaft 23 cooperates with the track groove 26 on the inner wall of the outer cylinder 24 through the track slider 27, first pushes the outer cylinder 24 to slide outward, until the track slider 27 reaches the end of the track groove 26, the outer cylinder 24 rotates synchronously with the inner shaft 23, and then drives the polishing plate 25 on one side of the outer cylinder 24 to rotate. The sliding of the outer cylinder 24 makes the polishing plate 25 contact with the bottom of the valve spring, achieving polishing of the bottom of the valve spring. After polishing, the outer cylinder 24 is reset by the spring 210 through the rotating ring 29, preparing for the next processing.

[0056] During polishing, the sliding of the outer cylinder 24 will move the sliding ring 36 on the side wall of the outer cylinder 24 to the fixed ring 35 on the inner wall of the control groove 21, extruding the hydraulic oil in the hydraulic space 37 between them. The hydraulic oil is transported to the telescopic rod 33 through the first channel 34, pushing the clamping slider 32 at the output end of the telescopic rod 33 to slide along the clamping slide groove 31. Since the rotating roller 14 and the clamping assembly 3 are circumferentially arranged around the forming shaft 13, the multiple sets of clamping sliders 32 synchronously drive the rotating rollers 14 to move towards the center, exerting pressure on the valve spring from multiple directions, achieving stable clamping of the valve spring, avoiding deviation or flying out of the valve spring during polishing, and ensuring polishing accuracy.

[0057] During the sliding process of the clamping slider 32, the telescopic rod 33 first pushes the clamping slider 32 to move to the limit position. During this process, the sliding of the clamping slider 32 synchronously slides the rotating roller 14. Due to the circumferential arrangement of the rotating roller 14, the valve spring arranged between multiple rotating rollers 14 is clamped by the sliding rotating rollers 14. Then, the telescopic rod 33 continues to drive the piston plate 48 to slide along the oil groove 47. The hydraulic oil in the oil groove 47 enters the locking groove 44 through the second channel 46, pushing the locking tooth rod 45 to slide outward, so that one end of the locking tooth rod 45 is inserted into the tooth groove 42 of the rotating roller 14. Through the engagement of the locking tooth rod 45 and the tooth groove 42, combined with the rectangular structure restriction of the locking groove 44 and the locking tooth rod 45, the rotating roller 14 is locked, preventing the rotating roller 14 from rotating with the valve spring or the polishing plate 25 during polishing, further ensuring the stability of the polishing process and ensuring the polishing effect.

[0058] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A valve spring manufacturing apparatus, characterized in that, The equipment includes a production device (1), which includes a housing (11). A wire feeding component (12) is provided inside the housing (11). The wire feeding component (12) is used to feed raw materials into a forming shaft (13) and a rotating roller (14). The forming shaft (13) and the rotating roller (14) are used to make valve springs from the raw materials. A cutting blade (15) is provided inside the housing (11). The cutting blade (15) is used to cut the raw materials. The production equipment (1) is provided with a grinding assembly (2) for grinding valve springs. The grinding assembly (2) includes a control groove (21) opened in the housing (11). A drive motor (22) is installed in the control groove (21). The drive motor (22) is used to drive the grinding plate (25) to rotate. The grinding plate (25) is arranged between the rotating rollers (14). The grinding plate (25) is used to grind the bottom of the valve spring. The output end of the drive motor (22) is fixedly connected to an inner shaft (23), which is inserted into the outer cylinder (24). A grinding plate (25) is fixedly connected to one side of the outer cylinder (24), and the forming shaft (13) is fixedly connected to one side of the grinding plate (25). A track groove (26) is provided on the inner wall of the outer cylinder (24), and a track slider (27) is slidably connected in the track groove (26). The track slider (27) is fixedly connected to the outer wall of the inner shaft (23). A first spring (210) is fixedly connected to the bottom of the outer cylinder (24), and the other end of the first spring (210) is fixedly connected to one side of the rotating ring (29). The rotating ring (29) is rotatably connected in the rotating groove (28), which is opened on the inner wall of the control groove (21). The rotating ring (29) is fixedly connected to the side wall of the inner shaft (23). The housing (11) is provided with a clamping assembly (3), which includes a clamping groove (31). The clamping groove (31) is opened in the housing (11). A telescopic rod (33) is fixedly connected in the clamping groove (31). A clamping slider (32) is provided at the output end of the telescopic rod (33). The clamping slider (32) is slidably connected in the clamping groove (31). A rotating roller (14) is provided on one side of the clamping slider (32). A sliding ring (36) is fixedly connected to the side wall of the outer cylinder (24), and a fixed ring (35) is fixedly connected to the inner wall of the control groove (21). A hydraulic space (37) is formed between the fixed ring (35) and the sliding ring (36). The hydraulic space (37) is connected to a first channel (34). The other end of the first channel (34) is connected to a telescopic rod (33). The first channel (34) is opened in the housing (11). Hydraulic oil is provided between the telescopic rod (33), the first channel (34) and the hydraulic space (37).

2. The valve spring manufacturing apparatus according to claim 1, characterized in that, A locking assembly (4) is provided on one side of the clamping slider (32). The locking assembly (4) includes a T-bar (43). One end of the T-bar (43) is fixedly connected to one side of the clamping slider (32), and the other end of the T-bar (43) is rotatably connected in a T-groove (41). The T-groove (41) is opened in the rotating roller (14).

3. The valve spring manufacturing apparatus according to claim 2, characterized in that, The T-shaped rod (43) has a locking groove (44) inside, and a locking tooth (45) is slidably connected in the locking groove (44). One end of the locking tooth (45) is inserted into the tooth groove (42), and the tooth groove (42) is opened in the rotating roller (14).

4. The valve spring manufacturing apparatus according to claim 3, characterized in that, The clamping slider (32) has a second channel (46) and an oil groove (47) inside, and a piston plate (48) is slidably connected inside the oil groove (47).

5. The valve spring manufacturing apparatus according to claim 4, characterized in that, The oil tank (47) is connected to the locking groove (44) through the second channel (46), and hydraulic oil is filled between the locking groove (44), the second channel (46) and the oil tank (47).

6. The valve spring manufacturing apparatus according to claim 2, characterized in that, The rotating roller (14), the clamping assembly (3) and the locking assembly (4) are arranged in multiple sets around the forming shaft (13).

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