Driving shaft finish machining equipment and driving shaft manufactured by same

Abstract

The invention discloses a drive shaft finish machining device, a drive shaft manufactured through the drive shaft finish machining device and automobile part machining, and aims to solve the problem that in the prior art, the work efficiency of finish machining of the inner wall of a through-type groove is low. A positioning tool used for clamping a shaft piece is arranged on the machine table, a machining groove penetrating from top to bottom is formed in the positioning tool, the machining groove penetrates through a space used for containing the shaft piece, and a rough cutter piece and a fine cutter piece which are matched with the machining groove are assembled on the positioning tool. The extrusion cutting edges are arranged on the rough cutter part and the finish cutter part in a stepped mode, the thickness difference between the extrusion cutting edges is 0.003 mm in sequence, the progressive finish machining of a penetrating type straight groove structure can be achieved during stamping finish machining through micro-size progressive increase, and the machining method has the beneficial effects of being high in machining precision and machining efficiency.

Description

Technical Field

[0001] The present invention relates to automobile parts processing, and more particularly to a drive shaft finishing device and a drive shaft prepared therefrom. Background Art

[0002] The driveshaft is a core component of a vehicle's powertrain, responsible for transferring engine torque from the transmission or differential to the wheels, driving the vehicle. Its design and performance directly impact a vehicle's driving efficiency, stability, and handling.

[0003] The drive shafts and transmission shafts on the market all need to undergo rough processing of the metal blanks first, and then they still need to be finely processed on the shafts (drive shafts, transmission shafts) and other components through finishing equipment such as machining centers and CNC machine tools to make the drive shafts and transmission shafts meet the standard requirements in terms of dimensional accuracy. However, although the processing methods on the market have a high level of automation and can use milling cutters and other tools to turn and mill the blanks, for processing operations, it is generally still necessary to manually install the shafts and other processing workpieces on the tooling for positioning and fixing, and then set the preset program through the machining center to perform fine processing on the specified position. However, for through-type holes and slot structures, when the inner wall needs to be finely polished, the turning operation space is relatively small, and the workpiece needs to be displaced (or the tool needs to be moved) with the tool to turn the inner wall, and the processing efficiency is still limited.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a drive shaft finishing device and a drive shaft prepared therefrom.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A drive shaft finishing device is used for finishing the through-type straight groove structure on the shaft member, comprising a machine table, a positioning tool for clamping the shaft member is provided on the machine table, a processing groove is provided on the positioning tool that passes through from top to bottom, and the processing groove passes through the space for accommodating the shaft member, a roughing tool and a finishing tool that are adapted to the processing groove are assembled on the positioning tool, and a stamping mechanism is provided on the machine table, and the stamping mechanism is used to sequentially pass the roughing tool and the finishing tool through the processing groove to pass through the positioning tool and the shaft member during stamping; The specific steps of the processing method are: placing the shaft into the positioning tooling, adjusting the through-type straight groove structure of the shaft to connect with the processing groove, fixing the shaft through the positioning tooling, and then placing the rough cutter in the processing groove, and then starting the stamping mechanism to punch the rough cutter, and then placing the fine cutter in the processing groove, and starting the stamping mechanism again to push the fine cutter, the fine cutter pushes the rough cutter for the second time, and the fine cutter extrude and shape the through-type straight groove structure of the shaft.

[0007] By adopting the above technical solution, when dealing with a workpiece with a through-type straight groove structure, the workpiece can be fixed by the positioning tool, and the rough tool and the fine tool are successively passed through the stamping mechanism to penetrate the positioning tool and the workpiece under the pushing force of the stamping, and the groove wall of the through-type straight groove structure is extruded and shaped by the rough tool and the fine tool under the displacement action, thereby replacing the traditional turning and milling of the workpiece by the machining center, which has the problem of slow processing efficiency, and the positioning tool and the rough tool and the fine tool are used to pass through the through-type straight groove structure, and compared with the turning and milling processing method, the positioning tool only needs to fix the workpiece on the basis, and during processing, there is no need to overcome the torque generated during fine processing, thereby reducing the clamping force of the tool clamping, further ensuring the accuracy of the workpiece, and the direct pressure method combined with the secondary extrusion processing of the rough tool and the fine tool can improve the control of the flatness and roughness inside the groove, and avoid the impact of one stamping on the workpiece.

[0008] The present invention is further configured as follows: the positioning tooling includes a support seat and a placement seat located at the top of the support seat, a placement cavity for accommodating the shaft is formed in the placement seat, and an elastic seat located on one side of the placement cavity is slidably connected to the placement seat, and the elastic seat is used to squeeze the shaft to fix the shaft.

[0009] The present invention is further configured as follows: a fixing mechanism for fixing the positioning tool is provided on the machine platform, the fixing mechanism includes a plurality of vertical rod groups, and a limiting pressure plate is adjustably connected to the vertical rod group, and the limiting pressure plate is used to provide the placement seat and the support seat to squeeze the machine platform to fix the positioning tool.

[0010] The present invention is further configured as follows: the roughing tool and the fine tool include a tool body adapted to the machining groove, the outer surface of the tool body is provided with an extrusion blade arranged along the contour of the tool body, and several of the extrusion blades are arranged at equal intervals, the roughing tool is used to provide an extrusion amount of 0.02-0.04mm for the through-type straight groove structure of the shaft member, and the fine tool is used to provide an extrusion amount of 0.04-0.06mm for the through-type straight groove structure of the shaft member.

[0011] The present invention is further configured as follows: the number of the extrusion blades located on the roughing piece or the fine cutting piece is at least 3, and the thickness difference between the extrusion blades located on the roughing piece or the fine cutting piece is 0.003 mm respectively.

[0012] The present invention is further configured as follows: an adjusting rod is threadedly connected to the placement seat, and the end of the adjusting rod is rotatably connected to the elastic seat for adjusting the force of the elastic seat against the extrusion shaft.

[0013] The present invention is further configured such that the minimum distance between the placement cavity and the top surface of the placement seat is less than the length of the roughing tool or the fine tool.

[0014] The present invention is further configured such that the distance between the lowest extrusion blade on the roughing blade and the top surface of the placement seat is less than the length between the extrusion blade and the top end thereof.

[0015] The drive shaft is fine-machined using drive shaft fine-machining equipment, and includes a main shaft section and a connecting shaft section and a transmission shaft section located at both ends of the main shaft section. The main shaft section is provided with a through-type straight groove structure, and the surface roughness of the through-type straight groove structure is 0.8-1.6μm.

[0016] The present invention is further configured as follows: the outer surface of the end portion of the transmission shaft segment is turned to form an axial end plane arranged parallel to the through-type straight groove structure, a coaxially arranged hexagonal groove is formed on the end face of the transmission shaft segment, and the connecting shaft segment is provided with a threaded hole connected to the through-type straight groove structure. The main shaft segment, connecting shaft segment and transmission shaft segment are coaxially arranged and their ends are parallel to each other. The coaxiality tolerance, that is, the parallelism tolerance, of the main shaft segment, connecting shaft segment and transmission shaft segment are less than 2 threads and 1 thread, respectively.

[0017] In summary, the present invention has the following beneficial effects: When dealing with a workpiece with a through-type straight groove structure, the workpiece can be fixed by a positioning fixture, and the roughing tool and the fine tool are successively passed through the stamping mechanism to penetrate the positioning fixture and the workpiece under the pushing force of the stamping, and the groove wall of the through-type straight groove structure is extruded and shaped by the roughing tool and the fine tool under the displacement action, thereby replacing the traditional turning and milling of the workpiece by the machining center, which has the problem of slow processing efficiency. The positioning fixture and the roughing tool and the fine tool are used to pass through the through-type straight groove structure. Compared with the turning and milling processing method, the positioning fixture only needs to fix the workpiece on the basis, and during processing, there is no need to overcome the torque generated during fine processing, thereby reducing the clamping force of the fixture clamping, further ensuring the accuracy of the workpiece, and the direct pressure method combined with the secondary extrusion processing of the roughing tool and the fine tool can improve the control of the flatness and roughness inside the groove, and avoid the impact of one stamping on the workpiece. In addition, the roughing and finishing blades used are arranged in a stepped manner, and the thickness difference between the extrusion blades is set at 0.003mm. Through the slight size increase, the through-type straight groove structure can be progressively finished during stamping finishing, with high processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle; Figure 3 Schematic diagram of the structure of the roughing blade or the fine blade in the present invention; Figure 4 A perspective view of the drive shaft of the present invention; Figure 5 Schematic diagram of the structure of the drive shaft in the present invention; Figure 6 is a plan view of the drive shaft of the present invention; Figure 7 is a cross-sectional view of the drive shaft of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of point B in the middle.

[0020] On the picture: 1. Machine table; 2. Positioning tooling; 21. Support seat; 22. Placement seat; 23. Elastic seat; 24. Adjustment rod; 3. Processing groove; 4. Stamping mechanism; 5. Fixing mechanism; 51. Vertical rod group; 52. Limiting pressure plate; 6. Cutter body; 61. Extrusion blade; 7. Spindle section; 8. Connecting shaft section; 81. Threaded hole; 9. Transmission shaft section; 91. Shaft end plane; 92. Hexagonal socket. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0024] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use, or are the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Furthermore, the terms “first,” “second,” “third,” etc., are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] Embodiment 1: A drive shaft finishing equipment is used for finishing the through-type straight groove structure on the shaft, comprising a machine table 1, a positioning tool 2 for clamping the shaft is provided on the machine table 1, a processing groove 3 is provided on the positioning tool 2 that runs through from top to bottom, the processing groove 3 runs through the space for accommodating the shaft, and a roughing tool and a fine tool that are adapted to the processing groove 3 are equipped on the positioning tool 2, a stamping mechanism 4 is provided on the machine table 1, and the stamping mechanism 4 is used to pass the roughing tool and the fine tool through the processing groove 3 in sequence through the positioning tool 2 and the shaft during stamping. In this embodiment, the workpiece to be processed is a drive shaft, and a through-type straight groove structure that runs through the shaft body and is perpendicular to the axial direction is provided on the shaft body of the drive shaft. Regarding the specific features of the through-type straight groove structure, the shape of its plane cross-section can be square or circular, which is adjusted according to the condition of the groove body of the workpiece to be processed. In this embodiment, see the attached Figure 1 and Figure 2 As shown, the through straight slot structure takes a rectangle as an example, corresponding to the attached Figure 4 and Figure 5 shown.

[0028] like Figure 2 As shown, the positioning tool 2 includes a support seat 21 and a placement seat 22 located at the top of the support seat 21, a placement cavity for accommodating the shaft is formed in the placement seat 22, and an elastic seat 23 located on one side of the placement cavity is slidably connected to the placement seat 22. The elastic seat 23 is used to squeeze the shaft to fix the shaft, and a fixing mechanism 5 for fixing the positioning tool 2 is provided on the machine 1. The fixing mechanism 5 includes a plurality of vertical rod groups 51. The vertical rod group 51 is adjustably connected to a limiting pressure plate 52. The limiting pressure plate 52 is used to provide the placement seat 22 and the support seat 21 with a force to squeeze the machine 1 to fix the positioning tool 2. In this embodiment, the vertical rod group 51 includes at least two vertically arranged screws (the threads are not shown), and the limiting pressure plate 52 is slidably connected to the The screw rod is provided with nuts on the upper and lower sides of the limit pressure plate 52 to fix the limit pressure plate 52. In this embodiment, at least two groups of fixing mechanisms 5 composed of the vertical rod group 51 and the limit pressure plate 52 are provided, and the multiple groups of fixing mechanisms 5 are arranged in a central symmetrical manner, so that the placement seat 22 is connected to the support seat 21 and is fixed stably on the machine 1. In this embodiment, the height of the support seat 21 can be freely adjusted by splicing. It has a plurality of hollow cylindrical support tubes, and the adjacent support tubes are sequentially clamped and coaxially arranged from top to bottom. By adjusting the number of support tubes, the processing requirements of workpieces with different groove depths can be met, and the structure of the screw rod is also convenient for fixing with the placement seat 22 and the support seat 21.

[0029] The specific steps of the processing method are as follows: after completing the adjustment of the fixing mechanism 5 and the placement seat 22, the shaft is placed in the placement seat 22 of the positioning tool 2, and after adjusting the through-type straight groove structure of the shaft to be connected with the processing groove 3, the roughing knife is placed from the processing groove 3, so that the roughing knife passes through the processing groove 3 and completes its section to fall into the through-type straight groove structure in advance. At this stage, the shaft can be rotated to cooperate with the pre-placement of the roughing knife to achieve the through-type straight groove structure and the processing groove 3 to be connected and in the same vertical state, and then the adjustment rod 24 is rotated to achieve the adjustment. The adjustment of the elastic seat 23 provides a fixed clamping force for the installation of the shaft, completes the positioning tool 2 to fix the shaft, and then places the rough tool in the processing groove 3, and then starts the punching mechanism 4 to punch the rough tool, and then places the fine tool in the processing groove 3, and starts the punching mechanism 4 again to push the fine tool. The fine tool pushes the rough tool for the second time, and the fine tool extrude and shape the through-type straight groove structure of the shaft, thereby realizing the fine processing of the groove ratio of the through-type straight groove structure by the rough tool and the fine tool.

[0030] like Figure 3 As shown, specifically, the roughing tool and the fine tool include a tool body 6 adapted to the processing groove 3, the outer surface of the tool body 6 is provided with an extrusion blade 61 arranged along the contour of the tool body 6, and a plurality of extrusion blades 61 are arranged at equal intervals. The roughing tool is used to provide an extrusion amount of 0.02-0.04mm for the through-type straight groove structure of the shaft, and the fine tool is used to provide an extrusion amount of 0.04-0.06mm for the through-type straight groove structure of the shaft.

[0031] like Figure 3 As shown, the number of extrusion blades 61 located on the roughing piece or the fine cutting piece is at least 3, and the thickness difference between the extrusion blades 61 located on the roughing piece or the fine cutting piece is 0.003mm. Specifically, the thickness of the extrusion blade 61 located at the bottom is 0.02mm, and from bottom to top, the thickness of the extrusion blade 61 on the roughing piece increases by 0.003mm. The lower edge of the extrusion blade 61 is provided with a transition chamfer structure, which can be used to facilitate the roughing piece or the fine cutting piece to extrude and shape the groove wall under the action of stamping. Since the two groove surfaces facing each other are synchronously extruded and finely processed by the extrusion blades 61 symmetrically arranged on the roughing piece or the fine cutting piece, the groove surface can have good flatness and parallelism.

[0032] like Figure 2As shown, an adjusting rod 24 is threadedly connected to the placement seat 22, and the end of the adjusting rod 24 is rotatably connected to the elastic seat 23, which is used to adjust the force of the elastic seat 23 against the extrusion shaft. By twisting the adjusting rod 24, the elastic seat 23 is pushed back and forth toward the placement cavity, thereby adjusting the size of the placement cavity and achieving the purpose of adjusting the force of the elastic seat 23 against the extrusion shaft, thereby firmly fixing the shaft. Moreover, since the inner wall or surface of the placement cavity and the elastic seat 23 are arc-shaped, they fit the shaft, avoiding deformation caused by concentrated stress on the shaft.

[0033] As another embodiment of the adjusting rod 24, a screw rod passing through the elastic seat 23 can also be selected as the adjusting rod 24. The adjusting rod 24 passes through the elastic seat 23 and is threadedly connected to the elastic seat 23. Since the elastic seat 23 is restricted by the placement seat 22, it can only move back and forth toward the placement cavity.

[0034] Moreover, the minimum distance between the placement cavity and the top surface of the placement seat 22 is less than the length of the roughing tool or the fine tool, and the distance between the lowest extrusion blade 61 on the roughing tool and the top surface of the placement seat 22 is less than the length of the extrusion blade 61 from its top end, so that when the roughing tool or the fine tool is placed in the placement seat 22, a section of the roughing tool or the fine tool can be moved to the processing groove 3 and the placement cavity, and then the shaft can be corrected, so as to ensure that the processing groove 3 and the through-type straight groove structure are in the same plane.

[0035] like Figures 4 to 8 As shown, embodiment 2: the drive shaft is fine-machined using a drive shaft fine-machining equipment, including a main shaft section 7 and a connecting shaft section 8 and a transmission shaft section 9 located at both ends of the main shaft section 7. A through-type straight groove structure is provided on the main shaft section 7, and the surface roughness of the through-type straight groove structure is 0.8-1.6μm.

[0036] The outer surface of the end of the transmission shaft segment 9 is turned to form an axial end plane 91 arranged parallel to the through-type straight groove structure. A coaxially arranged hexagonal groove 92 is formed on the end face of the transmission shaft segment 9. The connecting shaft segment 8 is provided with a threaded hole 81 connected to the through-type straight groove structure. The main shaft segment 7, the connecting shaft segment 8 and the transmission shaft segment 9 are coaxially arranged and their ends are parallel to each other. The coaxiality tolerance, that is, the parallelism tolerance, of the main shaft segment 7, the connecting shaft segment 8 and the transmission shaft segment 9 are less than 2 threads and 1 thread, respectively.

[0037] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A drive shaft finishing device, characterized in that: The invention relates to a through-type straight groove structure for fine-machining a shaft, comprising a machine (1), a positioning tool (2) for clamping the shaft, a processing groove (3) penetrating from top to bottom on the positioning tool (2), the processing groove (3) penetrating a space for accommodating the shaft, a roughing tool and a fine tool matching the processing groove (3) being mounted on the positioning tool (2), and a punching mechanism (4) being provided on the machine (1), the punching mechanism (4) being used to sequentially pass the roughing tool and the fine tool through the processing groove (3) and through the positioning tool (2) and the shaft during punching; The specific steps of the processing method are as follows: placing the shaft member in a positioning tool (2), adjusting the through-type straight groove structure of the shaft member to communicate with the processing groove (3), fixing the shaft member by the positioning tool (2), and then placing the roughing tool member in the processing groove (3), and then starting the punching mechanism (4) to punch the roughing tool member, and then placing the fine tool member in the processing groove (3), and starting the punching mechanism (4) again to push the fine tool member, the fine tool member pushing the roughing tool member for a second time, and the fine tool member extruding and shaping the through-type straight groove structure of the shaft member.

2. The drive shaft finishing equipment according to claim 1, characterized in that: The positioning tool (2) comprises a support seat (21) and a placement seat (22) located at the top of the support seat (21); a placement cavity for accommodating the shaft is formed in the placement seat (22); a spring seat (23) located at one side of the placement cavity is slidably connected to the placement seat (22); the spring seat (23) is used to squeeze the shaft to fix the shaft.

3. The drive shaft finishing equipment according to claim 2, characterized in that: The machine (1) is provided with a fixing mechanism (5) for fixing the positioning tool (2). The fixing mechanism (5) includes a plurality of vertical rod groups (51). The vertical rod groups (51) are adjustably connected to a limiting pressure plate (52). The limiting pressure plate (52) is used to provide a force for the placement seat (22) and the support seat (21) to squeeze the machine (1) to fix the positioning tool (2).

4. The drive shaft finishing equipment according to claim 2, characterized in that: The roughing tool and the fine tool comprise a tool body (6) adapted to the processing groove (3); the outer surface of the tool body (6) is provided with an extrusion blade (61) arranged along the contour of the tool body (6); a plurality of the extrusion blades (61) are arranged at equal intervals; the roughing tool is used to provide an extrusion amount of 0.02-0.04 mm for the through-type straight groove structure of the shaft; and the fine tool is used to provide an extrusion amount of 0.04-0.06 mm for the through-type straight groove structure of the shaft.

5. The drive shaft finishing equipment according to claim 4, characterized in that: The number of the extrusion blades (61) located on the roughing blade or the fine blade is at least three, and the thickness difference between the extrusion blades (61) located on the roughing blade or the fine blade is 0.003 mm.

6. The drive shaft finishing equipment according to claim 2, characterized in that: The placement seat (22) is threadedly connected with an adjusting rod (24), and the end of the adjusting rod (24) is rotatably connected to the elastic seat (23) for adjusting the force of the elastic seat (23) against the extrusion shaft.

7. The drive shaft finishing equipment according to claim 4, characterized in that: The minimum distance between the placement cavity and the top surface of the placement seat (22) is less than the length of the rough knife piece or the fine knife piece.

8. The drive shaft finishing equipment according to claim 7, characterized in that: The distance between the lowest extrusion blade (61) on the roughing blade and the top surface of the placement seat (22) is less than the length between the extrusion blade (61) and the top end thereof.

9. A drive shaft, finished by using the drive shaft finishing apparatus according to any one of claims 1 to 8, characterized in that: The invention comprises a main shaft section (7) and a connecting shaft section (8) and a transmission shaft section (9) respectively located at two ends of the main shaft section (7). The main shaft section (7) is provided with a through-type straight groove structure, and the surface roughness of the through-type straight groove structure is 0.8-1.6 μm.

10. The drive shaft according to claim 9, characterized in that: The outer surface of the end of the transmission shaft section (9) is turned to form an axial end plane (91) arranged parallel to the through-type straight groove structure, and a coaxially arranged inner hexagonal groove (92) is formed on the end surface of the transmission shaft section (9). The connecting shaft section (8) is provided with a threaded hole (81) connected to the through-type straight groove structure. The main shaft section (7), the connecting shaft section (8) and the transmission shaft section (9) are coaxially arranged and their ends are arranged parallel to each other. The coaxiality tolerance, i.e., the parallelism tolerance, of the main shaft section (7), the connecting shaft section (8) and the transmission shaft section (9) is less than 2 threads and 1 thread, respectively.

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