A spline machining device based on automobile steering system component production

Abstract

The application belongs to the technical field of spline machining, and discloses a spline machining device based on automobile steering system part production, which comprises a machining module and a driving sliding module, and further comprises: a positioning bin fixedly connected in the driving sliding module; a plurality of positioning locking assemblies arranged in the form of a ring in the positioning bin; and a pressure assembly slidingly connected to the positioning locking assembly and arranged in the positioning bin at the end away from the positioning locking assembly. The spline machining device is provided with a connecting piece and a gear shaft to form a secondary self-locking supercharging structure, and a T-shaped block and a fourth spring are used to push a bidirectional toothed plate to mesh with the gear shaft to achieve self-locking, so that the pressure stroke of the pressure plate is accurately limited and locked, the cutting impact force and equipment vibration interference in the spline milling process are resisted, the workpiece micro-looseness and micro-offset phenomena in the machining process are avoided, the machining precision of batch workpieces is ensured to be highly consistent, and the product machining qualification rate and production stability are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of spline machining technology, specifically a spline machining device based on the production of automotive steering system components. Background Technology

[0002] The automotive steering system is a core assembly ensuring vehicle handling, stability, and safety. Components with splined structures, such as the steering drive shaft, steering input shaft, and splined sleeves, play a crucial role in torque transmission, power matching, and steering angle adjustment. The machining accuracy, geometric tolerances, and surface quality of these splines directly determine the steering sensitivity, smoothness, and service life of the vehicle, which is vital to overall vehicle safety. With the rapid development of new energy vehicles and intelligent driving technologies, automotive steering systems are gradually upgrading towards higher precision, higher durability, and lighter weight. The industry has placed more stringent requirements on the machining accuracy, consistency, and finished product yield of steering component splines. Efficient, high-precision, and highly stable spline machining processes and equipment have become core necessities for component production.

[0003] Currently, the spline machining of automotive steering system components generally employs conventional processes such as knurling, insert splines, and milling splines, with the accompanying clamping devices mostly being general-purpose three-jaw chucks, four-jaw chucks, or simple fixed fixtures. These traditional clamping structures are simplistic and have many inherent defects in actual production, making them unsuitable for the high-precision and high-stability machining requirements of steering spline components. Traditional fixtures often use single-point or multi-point local clamping methods, resulting in uneven clamping force and problems such as part eccentricity, slight offset, and radial wobble. Furthermore, the clamping surfaces are prone to contamination with debris during machining, affecting subsequent batches and significantly impacting the assembly accuracy and torque transmission performance of subsequent steering components. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a spline machining apparatus based on the production of automotive steering system components.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spline machining device based on the production of automotive steering system components, comprising a machining module and a drive sliding module, and further comprising: The positioning chamber is fixed inside the drive sliding module; Multiple positioning and locking components are arranged in a ring inside the positioning chamber; The pressure component is slidably connected to the positioning and locking component, and the end of the pressure component away from the positioning and locking component is located inside the positioning chamber; The positioning and locking assembly includes an arc-shaped plate, one end of which is fixedly connected to a stop block, and the end of the stop block away from the arc-shaped plate is abutted against a drive assembly fixedly connected to the positioning chamber. The two ends of the arc-shaped plate are slidably mounted with movable parts. The movable parts include movable blocks. The movable blocks have air passages inside. The air passages are "L" shaped and the lateral ends of the air passages are inclined upwards. The pressure assembly includes pressure plates that are slidably connected inside the arc-shaped plate and symmetrically distributed. A connector is provided in the middle of the two pressure plates, and the connector is slidably connected inside the positioning chamber.

[0006] Preferably, a rubber gasket is fixed to the contact wall between the arc-shaped plate and the spline, and the lateral dimension of the rubber gasket is smaller than the lateral dimension of the arc-shaped plate.

[0007] Preferably, the interior of both ends of the arc-shaped plate is provided with cavities that allow the movable block to move vertically, and a positioning post is movably connected to the interior of the upper end of the movable block, with the top of the positioning post fixedly connected to the inner top wall of the cavity. The positioning post is located on the outer wall of one end of the movable block, and a first spring is movably sleeved thereon. The top and bottom ends of the first spring are connected to the movable block and the positioning post, respectively.

[0008] Preferably, a transverse positioning groove for moving the pressure component is provided in the middle of the outer wall of the arc-shaped plate; Air grooves are provided inside both ends of the arc-shaped plate.

[0009] Preferably, the pressure assembly further includes a fixed seat fixed to the inner wall of the positioning chamber, and a gear shaft is rotatably connected inside the fixed seat, the gear shaft being fixedly connected to the pressure plate; The bottom end of the pressure plate is slidably connected to the inside of the transverse positioning groove.

[0010] Preferably, an arc-shaped abutment is slidably connected inside the transverse positioning groove, and one end of the arc-shaped abutment abuts against the outer wall of the pressure plate; A second spring is fixedly connected to one end of the arc-shaped abutment away from the pressure plate, and one end of the second spring is fixedly connected to the inner wall of the transverse positioning groove.

[0011] Preferably, a compression component is installed in the middle of the transverse positioning groove; The compression component includes a base fixed to the middle of the transverse positioning groove, a bidirectional corrugated pipe fixed to the base, and round abutments fixed to both ends of the bidirectional corrugated pipe, the round abutments abutting against the side wall of the pressure plate.

[0012] Preferably, a third spring is provided between the round abutment and the base to reset the bidirectional bellows; The middle part of the bidirectional corrugated pipe is connected to the air groove.

[0013] Preferably, the connector includes a vertical rod fixed inside the positioning chamber, a T-shaped block slidably connected to the vertical rod, and a fourth spring movably sleeved on the outer wall of the vertical rod to reset the T-shaped block; The bottom of the T-block is fixed with a bidirectional toothed plate, and the two ends of the bidirectional toothed plate are meshed with the gear shaft.

[0014] Preferably, the drive assembly includes a hydraulic rod fixed to the positioning chamber, the output end of the hydraulic rod being fixed to a tapered abutment, one end of the tapered abutment extending into the interior of the positioning chamber and engaging with an abutment block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a multi-group, arc-shaped, ring-shaped clamping structure, consisting of a positioning and locking component, a pressure component, and a drive component working in tandem. A hydraulic rod drives a conical abutment to push against a stop block, achieving synchronous centering clamping at multiple workstations. This replaces traditional single-point, localized clamping structures and effectively solves problems such as uneven workpiece force, eccentric sway, and radial offset. Simultaneously, the pressure plate, arc-shaped abutment, and second spring form an elastic, flexible clamping structure. Combined with the anti-slip and cushioning properties of rubber pads, this structure can adaptively accommodate different specifications of steering spline shaft workpieces, avoiding defects such as workpiece deformation and surface damage caused by rigid compression.

[0016] This invention employs a secondary self-locking pressure-boosting structure comprised of connecting parts and a gear shaft. A T-block and a fourth spring push the bidirectional gear plate to engage with the gear shaft for self-locking, precisely limiting and locking the pressure stroke of the pressure plate to achieve a double-locking clamping effect. This structure significantly improves the workpiece clamping strength, effectively resisting cutting impact and equipment vibration interference during spline milling, preventing workpiece loosening or misalignment during processing, ensuring high consistency in batch workpiece processing accuracy, and greatly improving product qualification rate and production stability.

[0017] This invention integrates a mechanical linkage automatic chip removal structure. During the resetting process of the pressure plate, the round abutment is squeezed, and the positioning column and the first spring precisely limit the vertical displacement of the movable block, so that the inclined L-shaped air channel is precisely aligned and opened. The stored gas is used to blow air in a directional manner to remove impurities from the rubber gasket and the clamping contact surface, automatically removing residual iron filings and dust from the machining process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a detailed structural diagram of the positioning and locking assembly of the present invention; Figure 3 for Figure 2 A magnified view of the structure at point A in the middle; Figure 4 for Figure 2 A magnified schematic diagram of the structure at point B in the middle; Figure 5 This is a schematic diagram of the structure of the rubber gasket and the moving part of the present invention; Figure 6 This is a detailed structural diagram of the compression component of the present invention; Figure 7 This is a schematic diagram of the structure of the pressure plate and the arc-shaped plate of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point C in the middle; Figure 9 This is a schematic diagram of the structure of the base and the third spring of the present invention; Figure 10 This is a detailed structural diagram of the connector of the present invention; Figure 11 This is a bottom view of the movable component of the present invention.

[0019] In the picture: 100. Processing module; 200. Drive sliding module; 300. Positioning chamber; 400. Drive assembly; 410. Hydraulic rod; 420. Conical stop bar; 500. Positioning and locking assembly; 510. Arc-shaped plate; 520. Abutment block; 530. Rubber gasket; 540. Moving part; 541. Moving block; 542. Air passage; 543. Positioning post; 544. First spring; 550. Lateral positioning groove; 560. Air groove; 600, Pressure assembly; 610, Fixing base; 620, Gear shaft; 630, Pressure plate; 640, Arc-shaped abutment; 650, Second spring; 660, Compression component; 661, Bidirectional bellows; 662, Base; 663, Third spring; 664, Round abutment; 670, Connecting component; 671, T-block; 672, Vertical rod; 673, Fourth spring; 674, Bidirectional toothed plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0021] like Figures 1 to 11 As shown, the present invention provides a spline machining device for the production of automotive steering system components, including a machining module 100 and a drive sliding module 200, and further comprising: The positioning chamber 300 is fixedly connected inside the drive sliding module 200; Multiple positioning and locking components 500 are arranged in a ring inside the positioning chamber 300; The pressure component 600 is slidably connected to the positioning and locking component 500, and the end of the pressure component 600 away from the positioning and locking component 500 is disposed inside the positioning chamber 300; The positioning and locking assembly 500 includes an arc-shaped plate 510, one end of which is fixedly connected to a stop block 520, and the end of the stop block 520 away from the arc-shaped plate 510 is abutted against a drive assembly 400 fixedly connected to the positioning chamber 300. The two ends of the arc-shaped plate 510 are slidably mounted with movable parts 540. The movable parts 540 include movable blocks 541. An air passage 542 is opened inside the movable block 541. The air passage 542 is "L" shaped and the lateral end of the air passage 542 is inclined upward. The pressure assembly 600 includes pressure plates 630 that are slidably connected inside the arc-shaped plate 510 and symmetrically distributed. A connector 670 is provided in the middle of the two pressure plates 630, and the connector 670 is slidably connected inside the positioning chamber 300.

[0022] The above solution employs multiple sets of ring-shaped positioning and locking components 500 working in conjunction with pressure components 600 to achieve multi-point ring-shaped clamping from the outer periphery of the spline shaft workpiece. Compared with the traditional single-point clamping structure, this greatly improves the coaxiality and stability of workpiece clamping and effectively avoids workpiece eccentricity, wobbling and displacement problems during processing.

[0023] Meanwhile, the drive component 400 can precisely control the opening and closing stroke of the arc-shaped plate 510 through the abutment block 520. With the help of the movable block 541 with the L-shaped air passage 542 with the inclined structure, directional air blowing cleaning can be achieved after processing. It integrates clamping positioning and automatic chip removal functions, which greatly improves the spline processing accuracy and finished product quality, and is suitable for the mass production needs of high-precision spline parts for automotive steering.

[0024] A rubber gasket 530 is fixed to the contact wall between the arc-shaped plate 510 and the spline. The lateral dimension of the rubber gasket 530 is smaller than that of the arc-shaped plate 510.

[0025] By adopting the above solution, by setting a rubber pad 530 on the clamping contact surface of the arc-shaped plate 510, the flexible buffering characteristics of the rubber material can be utilized to avoid defects such as clamping, indentation, and wear on the surface of the automotive steering spline shaft caused by rigid metal clamping.

[0026] Meanwhile, the rubber pad 530 increases the coefficient of friction with the outer wall of the workpiece, further improving the clamping and anti-slip performance and preventing slight slippage of the workpiece. The structural design of the rubber pad 530, with a lateral dimension smaller than that of the arc-shaped plate 510, allows for sufficient space for airflow cleaning. Combined with the subsequent air blowing structure of the air channel 542, it ensures that the airflow can fully cover the periphery of the pad and the clamping area, leaving no dead corners for cleaning and ensuring the cleanliness and accuracy of each clamping and positioning.

[0027] The arc-shaped plate 510 has cavities at both ends that allow the movable block 541 to move vertically. The upper end of the movable block 541 is movably connected to a positioning post 543, and the top of the positioning post 543 is fixedly connected to the inner top wall of the cavity. The positioning post 543 is located inside the movable block 541. The outer wall of one end is movably fitted with a first spring 544. The top and bottom ends of the first spring 544 are connected to the movable block 541 and the positioning post 543, respectively.

[0028] The above solution is adopted: the positioning column 543 forms a vertical limiting guide for the movable block 541, so that the movable block 541 can only slide precisely along the vertical cavity, effectively avoiding the problems of offset and jamming, and ensuring displacement stability.

[0029] With the elastic reset structure of the first spring 544, the movable block 541 can achieve adaptive extension and retraction: when the workpiece is clamped, the movable block 541 is compressed and retracted to hide, without affecting the workpiece clamping; after the workpiece is unloaded and released, the first spring 544 elastically resets and drives the movable block 541 to move down for precise alignment, quickly completing the switching of the air passage 542.

[0030] Meanwhile, the positioning column 543 can strictly limit the downward stroke of the movable block 541, avoid excessive displacement causing structural misalignment, and ensure the precise and stable operation of the air blowing cleaning process.

[0031] A transverse positioning groove 550 is provided in the middle of the outer wall of the arc-shaped plate 510 to allow the pressure component 600 to move; Air grooves 560 are provided inside both ends of the arc-shaped plate 510.

[0032] The above solution provides precise lateral guidance for the sliding operation of the pressure assembly 600, restricting the movement trajectory of the pressure plate 630 and ensuring smooth and uniform pressure application. This avoids uneven force distribution on one side of the arc-shaped plate 510 and eccentric workpiece clamping caused by pressure deviation, further improving clamping accuracy. The symmetrically arranged air grooves 560 at both ends serve as air storage and guiding cavities, stably storing compressed gas and providing a stable air source for subsequent air blowing cleaning of the air passage 542. The symmetrical layout of the air passages on both sides enables uniform chip removal from all directions in the clamping area, enhancing the automated cleaning capability of the device and ensuring the cleanliness and positioning stability of the clamping structure during continuous processing.

[0033] The pressure assembly 600 also includes a fixed seat 610 fixed to the inner wall of the positioning chamber 300, and a gear shaft 620 is rotatably connected inside the fixed seat 610, and the gear shaft 620 is fixed to the pressure plate 630. The bottom end of the pressure plate 630 is slidably connected to the inside of the transverse positioning groove 550.

[0034] The above solution provides a stable mounting base for the gear shaft 620, ensuring that the gear shaft 620 rotates without shaking or shifting, resulting in strong structural stability.

[0035] The gear shaft 620 is fixedly linked to the pressure plate 630. Through gear transmission, the pressure plate 630 can be precisely driven to slide smoothly along the transverse positioning groove 550, achieving precise control of the pressure stroke. Compared with the traditional rigid pressure structure, the pressure accuracy is higher and the controllability is stronger. At the same time, the bottom limiting sliding structure design can effectively constrain the movement posture of the pressure plate 630, ensuring that multiple pressure plates 630 apply pressure synchronously and evenly, so that the clamping force of the arc-shaped plate 510 on the splined shaft workpiece is evenly distributed, avoiding the problem of workpiece deformation caused by excessive local pressure.

[0036] An arc-shaped abutment 640 is slidably connected inside the transverse positioning groove 550, and one end of the arc-shaped abutment 640 abuts against the outer wall of the pressure plate 630. A second spring 650 is fixedly connected to one end of the arc-shaped abutment 640 away from the pressure plate 630, and one end of the second spring 650 is fixedly connected to the inner wall of the transverse positioning groove 550.

[0037] The above scheme is adopted: the arc-shaped stop 640 and the second spring 650 cooperate to form an elastic buffer pressure structure. During the sliding pressure application process of the pressure plate 630, the second spring 650 can be squeezed by the arc-shaped stop 640 to achieve elastic adaptive pressure adjustment. It can adaptively fine adjust the clamping pressure according to the outer diameter of spline shaft workpieces of different specifications, and adapt to the processing of workpieces of multiple specifications.

[0038] Meanwhile, the second spring 650 provides a continuous and stable elastic pushing force, ensuring constant pressure during clamping, effectively buffering pressure fluctuations caused by machining vibrations, and preventing workpiece loosening. Furthermore, the arc-shaped contact surface of the arc-shaped abutment 640 can conform to the outer wall of the pressure plate 630, resulting in a large contact area and more uniform pressure application, further enhancing clamping stability.

[0039] A compression component 660 is installed in the middle of the transverse positioning groove 550; The compression component 660 includes a base 662 fixedly connected to the middle of the transverse positioning groove 550. A bidirectional corrugated pipe 661 is fixedly connected to the base 662. Round abutments 664 are fixedly connected to both ends of the bidirectional corrugated pipe 661. The round abutments 664 abut against the side wall of the pressure plate 630.

[0040] The above solution is adopted: the base 662 provides a stable installation support for the bidirectional corrugated pipe 661, ensuring that the overall structure of the compression component 660 is firm and not easy to loosen.

[0041] The bidirectional corrugated pipe 661, together with the symmetrical round abutment 664 at both ends, can simultaneously squeeze the round abutment 664 to achieve bidirectional compression when the pressure plates 630 on both sides slide and reset in opposite directions. This quickly squeezes the internal gas to complete the gas storage operation and provides a stable air pressure source for the subsequent automatic chip removal process.

[0042] The bidirectional symmetrical compression structure enables simultaneous force on both sides, resulting in a uniform and stable compression stroke. It avoids the problem of insufficient air pressure on one side, ensuring the stability and continuity of air supply. It also enables the coordinated operation of mechanical clamping and pneumatic cleaning actions, eliminating the need for an additional power source and achieving energy efficiency.

[0043] A third spring 663 is provided between the round abutment 664 and the base 662 to reset the bidirectional bellows 661; The middle part of the bidirectional corrugated pipe 661 is connected to the air groove 560.

[0044] Using the above scheme: After the pressure plate 630 resets and disengages from the compression, the third spring 663 can quickly drive the round abutment 664 to reset, causing the bidirectional bellows 661 to elastically rebound and reset, allowing the bidirectional bellows 661 to quickly return to its initial shape, completing automatic air replenishment and preparing for the next compression and storage operation, ensuring the continuity of the cycle operation. The structural design of the bidirectional bellows 661 being directly connected to the air groove 560 can realize the rapid guiding and transportation of compressed gas, reduce gas transmission loss, improve the response speed and airflow intensity of air blowing cleaning, and ensure that iron filings, dust and other impurities remaining at the clamping station can be cleaned, effectively improving the workpiece processing quality and the stability of continuous equipment processing.

[0045] It should be noted that, in combination Figure 3 It can be seen that the round abutment 664 has air holes for storing air in the bidirectional corrugated pipe 661.

[0046] The connector 670 includes a vertical rod 672 fixed inside the positioning chamber 300, a T-shaped block 671 slidably connected to the vertical rod 672, and a fourth spring 673 movably sleeved on the outer wall of the vertical rod 672 to reset the T-shaped block 671. The bottom of the T-block 671 is fixedly connected to a bidirectional toothed plate 674, and both ends of the bidirectional toothed plate 674 are meshed with the gear shaft 620.

[0047] The above scheme is adopted: the vertical rod 672 provides vertical sliding guide support for the T-block 671, ensuring that the T-block 671 slides smoothly without deviation, and the fourth spring 673 continuously provides elastic pushing force to drive the T-block 671 and the bottom bidirectional toothed plate 674 to move stably, so that the bidirectional toothed plate 674 and the gear shafts 620 on both sides are in a tight meshing state.

[0048] By utilizing the self-locking characteristics of gear and rack meshing, the rotation angle of gear shaft 620 and the pressure stroke of pressure plate 630 can be precisely locked, achieving secondary pressure increase and locking, greatly improving the clamping and fastening force, and effectively resisting the workpiece displacement trend caused by cutting force and equipment vibration during spline machining.

[0049] The drive assembly 400 includes a hydraulic rod 410 fixed to the positioning chamber 300. A tapered abutment 420 is fixed to the output end of the hydraulic rod 410. One end of the tapered abutment 420 extends into the interior of the positioning chamber 300 and abuts against abutment block 520.

[0050] Using the above solution: the hydraulic rod 410 can provide a stable and controllable axial driving force, which drives the conical abutment rod 420 to precisely extend and retract. Utilizing the tapered surface of the conical abutment rod 420 to gradually change its contact characteristics, it can smoothly push multiple sets of abutment blocks 520 to expand outwards simultaneously, or retract to release the contact and achieve structural reset, thereby precisely controlling the opening and closing actions of the arc-shaped plate 510.

[0051] The hydraulic drive system provides ample power, smooth operation, and strong self-locking, ensuring high synchronization and precise positioning of clamping and opening actions without jamming or offset. It is suitable for clamping automotive steering spline shaft workpieces of different diameters and specifications, while also ensuring the stability and consistency of clamping actions during long-term continuous processing, effectively improving the service life of the equipment and processing efficiency.

[0052] Working principle and usage process of this invention: First, in standby mode, all components are in their initial reset state. The operator activates the hydraulic rod 410, causing its output end to smoothly extend and retract forward, simultaneously moving the connected conical abutment rod 420 axially. This ensures the conical surface of the abutment rod 420 tightly contacts the corresponding abutment block 520. Under the pushing force of the conical abutment rod 420, the multiple abutment blocks 520 distributed in a circular array simultaneously expand outwards, causing the multiple fixedly matched arc-shaped plates 510 to simultaneously and evenly unfold outwards. This effectively expands the workpiece clamping station, reserving ample space for placement. At this point, the automotive steering spline shaft to be processed can be precisely placed at the center of the clamping area formed by the multiple arc-shaped plates 510, ensuring the workpiece is placed upright and aligned with its axis, laying the foundation for stable clamping later.

[0053] After the spline shaft workpiece is placed in position, two sets of symmetrically arranged pressure plates 630 continuously apply uniform and stable radial pressure to the outer walls of multiple arc-shaped plates 510 through the elastic buffering action of the arc-shaped abutment 640 at the bottom and the second spring 650. Relying on the elastic adaptive adjustment characteristics of the second spring 650, the clamping pressure can be effectively balanced, avoiding workpiece extrusion deformation caused by rigid pressure. At the same time, multiple arc-shaped plates 510 are simultaneously retracted from multiple directions around the workpiece, closely fitting the outer wall of the spline shaft to be processed, achieving preliminary flexible clamping and positioning of the spline shaft to be processed, ensuring the coaxiality and stability of the workpiece in the initial stage of clamping, and avoiding problems of workpiece offset and eccentricity in the early stage of processing.

[0054] To further enhance clamping force and stability, and eliminate the risk of workpiece micro-shaking and displacement during processing, the device achieves secondary pressure-increasing locking through a locking transmission structure. The T-block 671, relying on the elastic pushing force of the fourth spring 673, continuously drives the bidirectional toothed plate 674 to move smoothly, maintaining a precise meshing and locking state between the bidirectional toothed plate 674 and the gear shaft 620. Through the self-locking characteristics of the gear and rack meshing transmission, the pressure stroke of the pressure plate 630 is limited and locked, further enhancing the pressure intensity of the pressure plate 630. This precisely deepens the clamping pressure value between the pressure plate 630 and the arc-shaped plate 510 on the spline shaft to be processed, achieving double locking clamping, significantly improving the workpiece clamping firmness, and effectively resisting the displacement effects caused by subsequent machining cutting forces and equipment vibration.

[0055] After the workpiece clamping and locking operation is completed, the drive sliding module 200 of the equipment is started. The drive sliding module 200 provides a smooth sliding force, which drives the positioning chamber 300 and the positioning and locking components 500 inside to move smoothly as a whole, accurately conveying the spline shaft to be processed to the processing station of the processing module 100 after clamping and fixing. The positioning chamber 300 can achieve full positioning protection to ensure that there is no deviation or shaking during the workpiece conveying process. After the workpiece is accurately aligned, the processing module 100 is started to complete the processing of the spline shaft.

[0056] After the overall processing of the spline shaft is completed, the drive sliding module 200 slides in the opposite direction again, driving the positioning chamber 300 and the positioning locking component 500 to move synchronously back to their original positions, smoothly conveying the processed spline shaft outward, separating it from the processing area of ​​the processing module 100, completing the workpiece unloading process, and then taking out the processed spline shaft through the drive component 400.

[0057] During the process of the arc-shaped plate 510 retracting and resetting towards the center, the lower ends of the two pressure plates 630 move synchronously towards each other with the main structure. During the movement, they come into contact with and are squeezed by the round abutment 664. Through the force transmission of the round abutment 664, a uniform squeezing effect is formed on the bidirectional bellows 661, causing the gas stored in the bidirectional bellows 661 to be quickly squeezed out and directionally transported to the interior of the air groove 560. At the same time, the movable block 541, which is initially attached to the outer wall of the spline shaft and is in a retracted and hidden state, completely disengages its bottom end from the contact limit of the processed spline shaft. Under the elastic reset driving force of the first spring 544, the movable block 541 moves down smoothly as a whole and gradually moves out of the internal groove of the arc-shaped plate 510.

[0058] It should be noted that the downward stroke of the movable block 541 is constrained by the positioning post 543 and buffered by the elasticity of the first spring 544. The downward displacement is controllable and extremely small, only ensuring that the bottom of the movable block 541 moves out slightly, so that the inclined structure at the lateral end of the air passage 542 is precisely positioned directly below the rubber pad 530. After the air passage 542 is precisely aligned and connected, the gas inside the air groove 560 can be smoothly introduced into the sealed cavities at both ends of the arc-shaped plate 510, and then guided into the interior of the air passage 542 through the cavity. Finally, it is directionally ejected through the inclined port of the air passage 542, continuously and evenly blowing the bottom surface of the rubber pad 530. This effectively cleans the iron filings, dust, oil stains and other processing impurities remaining on the surface of the pad and the workpiece clamping surface, realizing automatic cleaning of the clamping structure and ensuring the accuracy and stability of the next round of workpiece clamping. The entire clamping, processing, resetting and cleaning process can be repeatedly operated to realize continuous automated processing operations of the equipment.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spline machining device for the production of automotive steering system components, comprising a machining module (100) and a drive sliding module (200), characterized in that: Also includes: The positioning chamber (300) is fixed inside the drive sliding module (200); Multiple positioning and locking components (500) are provided and arranged in a ring inside the positioning chamber (300); The pressure assembly (600) is slidably connected to the positioning and locking assembly (500), and the end of the pressure assembly (600) away from the positioning and locking assembly (500) is disposed inside the positioning chamber (300); The positioning and locking assembly (500) includes an arc-shaped plate (510), one end of which is fixedly connected to a stop (520), and the end of the stop (520) away from the arc-shaped plate (510) is abutted against a drive assembly (400) fixedly connected to the positioning chamber (300). The two ends of the arc-shaped plate (510) are slidably mounted with movable parts (540). The movable parts (540) include movable blocks (541). The movable blocks (541) have air passages (542) inside. The air passages (542) are "L" shaped and the lateral ends of the air passages (542) are inclined upward. The pressure assembly (600) includes pressure plates (630) that are slidably connected inside the arc-shaped plate (510) and symmetrically distributed. A connector (670) is provided in the middle of the two pressure plates (630), and the connector (670) is slidably connected inside the positioning chamber (300).

2. The spline machining device based on the production of automotive steering system components according to claim 1, characterized in that: A rubber gasket (530) is fixed to the contact wall of the arc-shaped plate (510) and the spline. The lateral dimension of the rubber gasket (530) is smaller than that of the arc-shaped plate (510).

3. The spline machining device based on the production of automotive steering system components according to claim 2, characterized in that: The arc-shaped plate (510) has cavities at both ends that allow the movable block (541) to move vertically. The upper end of the movable block (541) is movably connected to a positioning post (543), and the top of the positioning post (543) is fixedly connected to the inner top wall of the cavity. The positioning post (543) is located on the outer wall of one end of the movable block (541) and a first spring (544) is movably sleeved thereon. The top and bottom ends of the first spring (544) are connected to the movable block (541) and the positioning post (543) respectively.

4. The spline machining device based on the production of automotive steering system components according to claim 1, characterized in that: The outer wall of the arc-shaped plate (510) is provided with a transverse positioning groove (550) for moving the pressure component (600). Air grooves (560) are provided inside both ends of the arc-shaped plate (510).

5. The spline machining device based on the production of automotive steering system components according to claim 4, characterized in that: The pressure assembly (600) further includes a fixed seat (610) fixed to the inner wall of the positioning chamber (300), and a gear shaft (620) is rotatably connected inside the fixed seat (610), and the gear shaft (620) is fixed to the pressure plate (630); The bottom end of the pressure plate (630) is slidably connected to the inside of the transverse positioning groove (550).

6. The spline machining device based on the production of automotive steering system components according to claim 5, characterized in that: An arc-shaped abutment (640) is slidably connected inside the transverse positioning groove (550), and one end of the arc-shaped abutment (640) abuts against the outer wall of the pressure plate (630); The arc-shaped abutment (640) is fixedly connected to a second spring (650) at one end away from the pressure plate (630), and one end of the second spring (650) is fixedly connected to the inner wall of the transverse positioning groove (550).

7. The spline machining device based on the production of automotive steering system components according to claim 6, characterized in that: A compression member (660) is installed in the middle of the transverse positioning groove (550). The compression component (660) includes a base (662) fixedly connected to the middle of the transverse positioning groove (550), a bidirectional corrugated pipe (661) fixedly connected to the base (662), and round abutments (664) fixedly connected to both ends of the bidirectional corrugated pipe (661), the round abutments (664) abutting against the side wall of the pressure plate (630).

8. The spline machining device based on the production of automotive steering system components according to claim 7, characterized in that: A third spring (663) is provided between the round abutment (664) and the base (662) to reset the bidirectional bellows (661). The middle part of the bidirectional corrugated pipe (661) is connected to the air groove (560).

9. The spline machining device based on the production of automotive steering system components according to claim 1, characterized in that: The connector (670) includes a vertical rod (672) fixed inside the positioning chamber (300), a T-shaped block (671) slidably connected to the vertical rod (672), and a fourth spring (673) movably sleeved on the outer wall of the vertical rod (672) to reset the T-shaped block (671). The bottom of the T-block (671) is fixedly connected to a bidirectional toothed plate (674), and the two ends of the bidirectional toothed plate (674) are meshed with the gear shaft (620).

10. The spline machining device based on the production of automotive steering system components according to claim 1, characterized in that: The drive assembly (400) includes a hydraulic rod (410) fixed to the positioning chamber (300), the output end of the hydraulic rod (410) being fixed to a tapered abutment (420), one end of the tapered abutment (420) extending into the interior of the positioning chamber (300) and engaging with an abutment block (520).

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