A worm shaft cold extrusion processing device

Abstract

The utility model relates to worm shaft processing technical field, and disclose a kind of worm shaft cold extrusion processing device, including support frame, the top of support frame is fixed with operating box, first extrusion roller is rotatably arranged in operating box, second extrusion roller is movably arranged in operating box. First telescopic rod drives movable frame to move horizontally along sliding slot, realize the adjustment of the distance between first extrusion roller and second extrusion roller, satisfy the processing demand of different specifications worm shaft. In the adjustment process, first spiral bevel gear and spline shaft are slidably connected through the bar slot, to ensure that second extrusion roller can still receive power through gear meshing after displacement. The mechanism of cooperating second mounting rod directly driving first extrusion roller is realized, two rollers are synchronously counter-rotated, the influence of adjustment gap on transmission stability is eliminated, the combination of dynamic adjustment and continuous power transmission makes the device adapt to multi-specification workpieces while maintaining the stability of cold extrusion process.

Description

Technical Field

[0001] This utility model relates to the field of worm shaft processing technology, specifically to a cold extrusion processing device for worm shafts. Background Technology

[0002] Worm shafts, as core components of mechanical transmission systems, are widely used in reducers, automotive steering systems, and precision machine tools. Their machining accuracy and mechanical properties directly affect the overall operating efficiency and lifespan of the machine. While traditional turning or milling processes can meet basic geometric tolerances, they suffer from low material utilization, poor surface roughness, and shallow work-hardened layers, making them unsuitable for high-precision, high-load operating conditions. Cold extrusion technology, through direct metal plastic deformation, offers advantages such as energy saving, continuous fiber flow lines, and high surface quality, and is gradually becoming a research hotspot in the worm shaft manufacturing field.

[0003] For example, a Chinese utility model patent (authorization announcement number CN218049717U) discloses a cold extrusion processing device for worm shafts. This device can adjust the distance between straightening rollers through a first angle adjustment mechanism and a second angle adjustment mechanism, enabling the processing of worm shafts of different sizes and improving the applicability of the equipment. However, the existing processing device has a drawback: its height adjustment and spacing adjustment are coupled and constrained. When the spacing is adjusted by changing the tilt angle of the straightening rollers, the overall height of the equipment changes synchronously, requiring repeated leveling of the processing platform and limiting continuous production efficiency. In addition, because the auxiliary positioning structure in this existing device is in a relatively fixed position, it is difficult to meet the effective limiting of worm shafts of different sizes and specifications, resulting in poor practicality. Utility Model Content

[0004] The purpose of this utility model is to provide a worm shaft cold extrusion processing device. By adjusting the cooperation between the drive mechanism and the positioning plate, it can be adapted to worm shafts of various specifications. Flexible clamping ensures high-precision cold extrusion, synchronous transmission reduces errors, and improves processing efficiency and finished product qualification rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a worm shaft cold extrusion processing device, comprising a support frame, an operation box fixed at the top of the support frame, a first extrusion roller rotatably disposed in the operation box, and a second extrusion roller movably disposed in the operation box.

[0006] The operating box is equipped with an adjustment drive mechanism, which includes a spacing adjustment component. The spacing adjustment component includes a movable frame that slides in the operating box. A first connecting rod is provided in the movable frame, and a second extrusion roller is provided outside the first connecting rod.

[0007] The adjustment drive mechanism includes a drive assembly, which includes a mounting plate disposed in the operation box. A second mounting rod is rotatably disposed outside the mounting plate, and the first extrusion roller is disposed outside the second mounting rod.

[0008] The adjustment drive mechanism is configured to adjust the distance between the first extrusion roller and the second extrusion roller via the distance adjustment component and to achieve synchronous reverse rotation of the first extrusion roller and the second extrusion roller via the drive component.

[0009] Preferably, the spacing adjustment assembly includes a mounting base disposed beside the control box, wherein a first telescopic rod is disposed in the mounting base, and the output end of the first telescopic rod is fixedly connected to the side of the movable frame. The control box has a sliding groove, and the movable frame is slidably disposed within the sliding groove.

[0010] Preferably, a connecting frame is fixed to the outside of the movable frame, and a first spiral bevel gear is provided on the outside of the connecting frame and at the end of the first connecting rod. The two first spiral bevel gears mesh with each other.

[0011] Preferably, the drive assembly includes a splined shaft movably disposed in the control box, and a second helical bevel gear is provided on the exterior of the splined shaft and at the end of the second mounting rod. The two second helical bevel gears mesh with each other.

[0012] Preferably, the first spiral bevel gear outside the connecting frame is externally movably connected to the spline shaft, and the first spiral bevel gear has a slot for the spline shaft to pass through.

[0013] Preferably, a first motor is fixed to the side of the control box, and the output shaft of the first motor passes through the control box and is connected to the second mounting rod for transmission.

[0014] Preferably, a second motor is fixed to the outside of the operating box, a screw is driven to the output shaft of the second motor, a slider is threaded to the external screw, a second telescopic rod is fixed to the top of the slider, and a positioning plate is fixed to the output end of the second telescopic rod.

[0015] Preferably, the operation box has a limiting groove for the slider to slide, and the positioning plate is fixed with a soft pad to avoid damage to the worm shaft.

[0016] Compared with the prior art, this utility model provides a cold extrusion processing device for worm shafts, which has the following features:

[0017] Beneficial effects:

[0018] 1. This worm shaft cold extrusion processing device uses a first telescopic rod to drive a movable frame to move horizontally along a slide groove, thereby adjusting the distance between the first and second extrusion rollers to meet the processing requirements of worm shafts of different specifications. During adjustment, the first spiral bevel gear and the spline shaft slide together through a groove, ensuring that the second extrusion roller can still receive power through gear meshing after displacement. Combined with the mechanism of the second mounting rod directly driving the first extrusion roller, the two rollers rotate synchronously in opposite directions, eliminating the impact of adjustment gap on transmission stability. The combination of dynamic adjustment and continuous power transmission allows the device to adapt to multiple workpiece specifications while maintaining the stability of the cold extrusion process, reducing processing deviations caused by adjustment errors, and directly improving the finished product qualification rate.

[0019] 2. This worm gear shaft cold extrusion processing device uses a second motor to drive a screw-slider mechanism for horizontal fine-tuning of the positioning plate. Combined with the vertical lifting of the second telescopic rod, the device achieves flexible contact between the workpiece and a soft pad, avoiding surface indentations or deformation caused by traditional rigid clamping. This is particularly suitable for high-precision worm gear shaft processing. After a single section of processing is completed, the positioning plate can be returned to its initial position, and the workpiece can be axially fed to process the next area. This improves processing efficiency while reducing rework rates due to surface defects. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a worm gear shaft cold extrusion processing device according to the present invention. Figure 1 .

[0021] Figure 2 This is a three-dimensional structural diagram of a worm gear shaft cold extrusion processing device according to the present invention. Figure 2 .

[0022] Figure 3 This is a partial three-dimensional structural diagram of a worm shaft cold extrusion processing device according to the present invention.

[0023] Figure 4 This is a partial disassembly diagram of a worm gear shaft cold extrusion processing device according to the present invention. Figure 1 .

[0024] Figure 5 This is a partial disassembly diagram of a worm gear shaft cold extrusion processing device according to the present invention. Figure 2 .

[0025] In the diagram: 1. Support frame; 2. Control box; 31. First extrusion roller; 32. Second extrusion roller; 4. Adjustment drive mechanism; 41. Spacing adjustment assembly; 411. Mounting base; 412. First telescopic rod; 413. Movable frame; 414. First connecting rod; 415. Connecting frame; 416. First spiral bevel gear; 42. Drive assembly; 421. Mounting plate; 422. Second mounting rod; 423. First motor; 424. Splined shaft; 425. Second spiral bevel gear; 51. Second motor; 52. Screw; 53. Slider; 54. Second telescopic rod; 55. Positioning plate. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0027] Example 1: Please refer to Figures 1-5 This utility model provides a technical solution: a cold extrusion processing device for a worm gear shaft, including a support frame 1, an operation box 2 fixed to the top of the support frame 1, a first extrusion roller 31 rotatably disposed in the operation box 2, and a second extrusion roller 32 movably disposed in the operation box 2. The independent installation design of the two rollers provides a structural foundation for subsequent spacing adjustment and power transmission systems, meeting the core process requirements of cold extrusion processing.

[0028] The operating box 2 is equipped with an adjustment drive mechanism 4, which includes a spacing adjustment component 41. The spacing adjustment component 41 includes a movable frame 413 that slides in the operating box 2. A first connecting rod 414 is disposed in the movable frame 413, and a second extrusion roller 32 is disposed outside the first connecting rod 414. The spacing adjustment provides a physical carrier to ensure the structural stability of the adjustment process.

[0029] The adjustment drive mechanism 4 includes a drive assembly 42, which contains a mounting plate 421 disposed in the operation box 2. A second mounting rod 422 is rotatably mounted on the mounting plate 421, and a first extrusion roller 31 is disposed outside the second mounting rod 422. This improves power transmission efficiency and provides hardware support for synchronous reverse rotation.

[0030] The adjustment drive mechanism 4 is configured to adjust the distance between the first extrusion roller 31 and the second extrusion roller 32 via the distance adjustment component 41 and to achieve synchronous counter-rotation of the first extrusion roller 31 and the second extrusion roller 32 via the drive component 42. The synergistic mechanism of dynamic adjustment and continuous power transmission enables the device to adapt to workpieces of various specifications while maintaining the stability of the cold extrusion process, reducing processing deviations caused by adjustment errors, and directly improving the finished product qualification rate.

[0031] Furthermore, the spacing adjustment component 41 includes a mounting base 411 disposed beside the operation box 2. A first telescopic rod 412 is disposed in the mounting base 411, and the output end of the first telescopic rod 412 is fixedly connected to the side of the movable frame 413. A slide groove is provided in the operation box 2, and the movable frame 413 is slidably disposed inside the slide groove. The first telescopic rod 412 drives the movable frame 413 to move horizontally along the slide groove, achieving precise adjustment of the spacing between the first extrusion roller 31 and the second extrusion roller 32. The slide groove guide structure ensures a smooth adjustment process, meeting the processing requirements of worm shafts of different specifications.

[0032] Furthermore, a connecting frame 415 is fixed to the outside of the movable frame 413, and a first spiral bevel gear 416 is provided on the outside of the connecting frame 415 and at the end of the first connecting rod 414. The two first spiral bevel gears 416 mesh with each other. The meshing design of the two first spiral bevel gears 416 can maintain power input even after the second extrusion roller 32 is displaced, and together with the strip groove sliding structure of the spline shaft 424, ensures that the power transmission is uninterrupted during the adjustment process.

[0033] Furthermore, the drive assembly 42 includes a splined shaft 424 movably disposed in the operation box 2. Second spiral bevel gears 425 are provided on the exterior of the splined shaft 424 and at the end of the second mounting rod 422. The two second spiral bevel gears 425 mesh with each other, achieving efficient power transmission and providing a transmission basis for the synchronous counter-rotation of the first extrusion roller 31 and the second extrusion roller 32, ensuring the dynamic stability of the cold extrusion process.

[0034] Furthermore, the first spiral bevel gear 416 outside the connecting frame 415 is externally movably connected to the spline shaft 424, and a slot is provided inside the first spiral bevel gear 416 for the spline shaft 424 to pass through. The sliding fit structure of the slot allows the first spiral bevel gear 416 to maintain a dynamic connection with the spline shaft 424 during adjustment, eliminating the influence of adjustment clearance on transmission stability and reducing machining vibration.

[0035] Furthermore, a first motor 423 is fixed to the side of the control box 2. The output shaft of the first motor 423 passes through the control box 2 and is connected to the second mounting rod 422 for transmission. The design of the first motor 423 directly driving the second mounting rod 422 simplifies the transmission chain while improving control accuracy, providing a reliable power source for synchronous reverse rotation, and ensuring the continuity of cold extrusion processing.

[0036] Example 2: Please refer to Figure 5Furthermore, in conjunction with Embodiment 1, a second motor 51 is fixed externally to the operating box 2. A screw 52 is driven and connected to the output shaft of the second motor 51. A slider 53 is threaded onto the external screw 52. A second telescopic rod 54 is fixed to the top of the slider 53, and a positioning plate 55 is fixed to the output end of the second telescopic rod 54. The screw 52-slider 53 mechanism enables horizontal fine-tuning of the positioning plate 55. Combined with the vertical lifting function of the second telescopic rod 54, a three-dimensional positioning system is constructed, improving the flexibility and accuracy of workpiece positioning.

[0037] Furthermore, the operating box 2 is provided with a limiting groove for the sliding block 53 to slide, and a soft pad is fixed to the outside of the positioning plate 55 to avoid damage to the worm shaft. The flexible contact design between the soft pad and the worm shaft workpiece effectively avoids surface indentations or deformation caused by traditional rigid clamping, and is particularly suitable for high-precision worm shaft machining, reducing the rework rate caused by surface defects.

[0038] The working process of the worm gear cold extrusion processing device is as follows: After the operator starts the equipment, the operation box 2 at the top of the support frame 1 enters the standby state. First, the distance between the first extrusion roller 31 and the second extrusion roller 32 is adjusted by adjusting the drive mechanism 4: the first telescopic rod 412 in the mounting base 411 pushes the movable frame 413 to move horizontally along the slide groove of the operation box 2. The movable frame 413 drives the first connecting rod 414 and the external second extrusion roller 32 to move synchronously, realizing the precise adjustment of the distance between the first extrusion roller 31 and the second extrusion roller 32. During this process, the connecting frame 415 moves with the movable frame 413. The external first spiral bevel gear 416 maintains a sliding engagement with the spline shaft 424 through the strip groove. At the same time, it drives another first spiral bevel gear 416 at the end of the first connecting rod 414 through the meshing relationship, ensuring that the second extrusion roller 32 can continuously receive power transmission after displacement.

[0039] Once the spacing is adjusted, the drive assembly 42 starts: the first motor 423 drives the second mounting rod 422 to rotate, and through the second spiral bevel gear 425 at its end meshing with another second spiral bevel gear 425 outside the spline shaft 424, causing the spline shaft 424 to rotate synchronously. At this time, the spline shaft 424 transmits power to the first connecting rod 414 via the first spiral bevel gear 416, ultimately driving the second extrusion roller 32 to rotate; simultaneously, the second mounting rod 422 directly drives the first extrusion roller 31 to rotate. Through the meshing direction design of the first spiral bevel gear 416 and the second spiral bevel gear 425, the synchronous counter-rotational motion of the first extrusion roller 31 and the second extrusion roller 32 is achieved.

[0040] While the first extrusion roller 31 and the second extrusion roller 32 are operating, the second motor 51 drives the screw 52 to rotate, causing the slider 53 to move along the limiting groove of the operating box 2 to the designated position. Subsequently, the second telescopic rod 54 pushes the positioning plate 55 to rise and fall vertically, making flexible contact with the worm shaft workpiece through the soft pad, thus completing axial positioning and clamping. At this time, the first extrusion roller 31 and the second extrusion roller 32 apply cold extrusion force to the worm shaft through opposite rotation. The soft pad design prevents the positioning plate 55 from damaging the workpiece surface. During the processing, the position of the second extrusion roller 32 can be finely adjusted in real time through the first telescopic rod 412, in conjunction with the horizontal and vertical movement of the positioning plate 55, to adapt to the processing requirements of worm shafts of different specifications. After completing a single segment of processing, the positioning plate 55 returns to the initial position, and the workpiece is fed axially for segmented processing until the entire worm shaft is cold extruded and formed.

[0041] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A cold extrusion processing device for a worm gear shaft, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixed with an operation box (2), in which a first extrusion roller (31) is rotatably arranged, and a second extrusion roller (32) is movably arranged; The operation box (2) is equipped with an adjustment drive mechanism (4); The adjustment drive mechanism (4) includes a spacing adjustment component (41), which includes a movable frame (413) that slides in the operation box (2). A first connecting rod (414) is provided in the movable frame (413), and the second extrusion roller (32) is provided outside the first connecting rod (414). The adjustment drive mechanism (4) includes a drive assembly (42), which includes a mounting plate (421) disposed in the operation box (2). A second mounting rod (422) is rotatably disposed on the mounting plate (421), and the first extrusion roller (31) is disposed outside the second mounting rod (422). The adjustment drive mechanism (4) is configured to adjust the distance between the first extrusion roller (31) and the second extrusion roller (32) via the distance adjustment component (41) and to achieve synchronous reverse rotation of the first extrusion roller (31) and the second extrusion roller (32) via the drive component (42).

2. The worm shaft cold extrusion processing apparatus according to claim 1, characterized in that: The spacing adjustment component (41) includes a mounting base (411) disposed on the side of the operation box (2), and a first telescopic rod (412) is disposed in the mounting base (411). The output end of the first telescopic rod (412) is fixedly connected to the side of the movable frame (413). The operation box (2) is provided with a sliding groove, and the movable frame (413) is slidably disposed inside the sliding groove.

3. The worm shaft cold extrusion processing apparatus according to claim 1, characterized in that: A connecting frame (415) is fixed to the outside of the movable frame (413), and a first spiral bevel gear (416) is provided on the outside of the connecting frame (415) and at the end of the first connecting rod (414). Two first spiral bevel gears (416) mesh with each other.

4. The worm shaft cold extrusion processing apparatus according to claim 1, characterized in that: The drive assembly (42) includes a spline shaft (424) movably disposed in the operation box (2), and a second spiral bevel gear (425) is provided on the outside of the spline shaft (424) and at the end of the second mounting rod (422); Two second spiral bevel gears (425) mesh with each other.

5. The worm shaft cold extrusion processing apparatus according to claim 3, characterized in that: The first spiral bevel gear (416) outside the connecting frame (415) is externally movably connected to the spline shaft (424), and the first spiral bevel gear (416) has a slot for the spline shaft (424) to pass through.

6. The worm shaft cold extrusion processing apparatus according to claim 4, characterized in that: A first motor (423) is fixed to the side of the operation box (2). The output shaft of the first motor (423) passes through the operation box (2) and is connected to the second mounting rod (422) for transmission.

7. The worm shaft cold extrusion processing apparatus according to claim 1, characterized in that: The operation box (2) is externally fixed with a second motor (51), and a screw (52) is drivenly connected to the output shaft of the second motor (51). The screw (52) is externally threaded with a slider (53), and a second telescopic rod (54) is fixed to the top of the slider (53). A positioning plate (55) is fixed to the output end of the second telescopic rod (54).

8. The worm shaft cold extrusion processing apparatus according to claim 7, characterized in that: The operation box (2) is provided with a limiting groove for sliding the slider (53), and the positioning plate (55) is fixed with a soft pad to avoid damage to the worm shaft.

Images