Finish machining turn-milling device for automobile transmission shaft

Abstract

The utility model relates to the technical field of automobile transmission shaft machining, in particular to an automobile transmission shaft finish machining turning and milling device which comprises a three-axis machine tool and a workpiece, a milling cutter is installed on the three-axis machine tool, and a positioning mechanism is arranged on the three-axis machine tool and used for turning and milling the workpiece. Comprising a base fixed to the top of a machining table of the three-axis machine tool, a base is fixed to the top of the base, guide rail bases are fixed to the two ends of the top of the base, sliding blocks are transversely and slidably installed at the upper ends of the guide rail bases, and supporting arms are rotatably installed on the outer walls of the two ends of the guide rail bases; upper cams are rotationally installed on the outer walls of the two ends of the sliding block and located in the upper sliding grooves, and a first air cylinder is installed in the middle of the interior of the base. Automatic centering clamping of a workpiece is achieved through pneumatic driving, the forward / inverted positioning state can be rapidly switched, deviation is prevented through a limiting structure, and the machining stability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of automotive drive shaft machining technology, specifically to a milling and turning device for precision machining of automotive drive shafts. Background Technology

[0002] The driveshaft is a core component of power transmission in automobiles, responsible for transferring power from the engine / transmission to the drive axle. It is typically equipped with universal joints at both ends to compensate for shaft misalignment caused by suspension movement during transmission. The core component of the universal joint is the universal joint fork, which connects to the other end via a cross shaft, enabling multi-angle power transmission.

[0003] According to CN209424607U, a milling and turning device for precision machining of automotive drive shafts is disclosed. This technology discloses "a milling and turning device for precision machining of automotive drive shafts, which aims to solve the problem that the fixing steps are relatively cumbersome and affect the machining efficiency when performing shaft end milling with traditional milling and turning equipment. It includes a machining platform and multiple support feet installed at the lower end of the machining platform. A propulsion component is installed at the upper end of the machining platform, and a rotating device is provided on the propulsion component. Two support plates are symmetrically arranged at the end of the machining platform away from the rotating device, and the same top plate is installed at the upper end of the two support plates. A high-speed motor is provided at the lower end of the top plate, and a milling cutter is detachably fixedly installed on the output end of the high-speed motor." This technology has the technical effect of being "especially suitable for precision machining of automotive drive shafts and has high commercial prospects."

[0004] In existing technologies, universal joint forks have the following core problems during precision machining: Due to the special structure of the universal joint fork (with a cross shaft hole and a flange end), traditional fixtures cannot simultaneously meet the requirement of rapid switching between upright and inverted machining states. When different end faces need to be machined, operators must manually disassemble and re-clamp the workpiece, which is not only inefficient but also makes it difficult to guarantee repeatability and positioning accuracy, resulting in excessive coaxiality between the cross shaft hole and the flange end. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a milling and turning device for precision machining of automotive drive shafts. It achieves automatic centering and clamping of workpieces through pneumatic drive, can quickly switch between upright and inverted positioning states, and uses a limiting structure to prevent displacement, thus ensuring machining stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a milling and turning device for precision machining of automotive drive shafts, comprising a three-axis machine tool and a workpiece, wherein a milling cutter is mounted on the three-axis machine tool, and a positioning mechanism is provided on the three-axis machine tool for milling and turning the workpiece, the positioning mechanism comprising:

[0007] The main components include a base fixed to the top of the machining table of a three-axis machine tool, a base fixed to the top of the base, guide rail seats fixed at both ends of the top of the base, a slider slidably mounted on the upper end of the guide rail seat, support arms rotatably mounted on the outer walls of both ends of the guide rail seat, upper sliding grooves and lower sliding grooves respectively opened in the inner upper and lower ends of the support arms, upper cams rotatably mounted on the outer walls of both ends of the slider, and the upper cams are located inside the upper sliding grooves, a first cylinder is installed in the middle of the base, a movable block is fixed to the output end of the first cylinder, and lower cams rotatably mounted on both ends of the movable block, and the lower cams are located inside the lower sliding grooves;

[0008] An execution component, mounted on the main component, is used to fix the workpiece;

[0009] A limiting component is installed on the main component and is used to limit the workpiece.

[0010] Preferably, the limiting component includes a limiting seat disposed on the main component, with limiting rods fixed at both ends of the top of the limiting seat, and a lifting component disposed on the main component for controlling the lifting and lowering of the limiting component.

[0011] Preferably, the lifting assembly includes a mounting plate disposed on the main body assembly, and a limiting seat is fixed to the top of the mounting plate. Guide rods are fixed at the four corners of the bottom of the mounting plate, and the guide rods are slidably installed through the base. Second cylinders are installed at both the front and rear ends of the bottom of the base, and the output ends of the second cylinders are fixed to the mounting plate.

[0012] Preferably, the limiting component further includes a limiting groove formed in the middle of the upper end of the limiting seat.

[0013] Preferably, the actuating component includes a mounting base fixed to the top of the slider, and a positioning head is mounted on the upper end of the mounting base.

[0014] Preferably, the clamping surface of the positioning head is provided with a wear-resistant pad. Beneficial effects

[0015] This utility model provides a milling and turning device for precision machining of automotive drive shafts. Compared with the prior art, it has the following advantages:

[0016] 1. After the workpiece is positioned on the limiting component, the output end of the first cylinder drives the movable block to move downward. The movable block drives the support arm to rotate through the lower cam and the upper cam. The support arm drives the slider to move along the guide rail through the upper cam. The guide rail drives the positioning head to move horizontally through the mounting seat. The positioning heads on both sides move in opposite directions synchronously, thereby centering and clamping the workpiece between them. Furthermore, the clamping or releasing action can be completed automatically without manual intervention.

[0017] 2. The limit assembly on the mounting plate is driven to rise and fall by the output end of the second cylinder. When the workpiece is inverted and positioned, it is in the lowered state; when the workpiece is upright and fixed, it is in the raised state. This enables quick switching of the lifting height of the limit assembly when positioning the workpiece, satisfying the requirements for inverted or upright positioning of the workpiece.

[0018] 3. When the workpiece is placed on the limiting seat, the limiting rod is inserted into the round hole in the workpiece to limit the workpiece and prevent the workpiece from rotating or shifting during processing. If the workpiece needs to be positioned upside down, the arc-shaped end of the workpiece is directly constrained by the limiting groove to avoid positioning deviation caused by instability of the center of gravity when upside down. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the positioning mechanism in this utility model when positioning the workpiece in an inverted position;

[0021] Figure 3 This is a schematic diagram of the positioning mechanism in this utility model when positioning the workpiece upright;

[0022] Figure 4 This is a cross-sectional view of the main components of this utility model;

[0023] Figure 5 This is a schematic diagram of the limiting component in this utility model.

[0024] In the diagram: 1. Three-axis machine tool; 2. Milling cutter; 3. Positioning mechanism; 31. Main component; 311. Base; 312. Base; 313. Guide rail seat; 314. Slider; 315. Support arm; 316. Upper slide groove; 317. Lower slide groove; 318. Upper cam; 319. First cylinder; 3110. Moving block; 3111. Lower cam; 32. Actuation component; 321. Mounting seat; 322. Positioning head; 33. Limiting component; 331. Limiting seat; 332. Limiting rod; 333. Limiting groove; 34. Lifting component; 341. Mounting plate; 342. Guide rod; 343. Second cylinder; 4. Workpiece. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a milling and turning device for precision machining of automotive drive shafts, comprising a three-axis machine tool 1 and a workpiece 4, a milling cutter 2 mounted on the three-axis machine tool 1, and a positioning mechanism 3 provided on the three-axis machine tool 1 for milling and turning workpiece 4, the positioning mechanism 3 comprising:

[0027] The main component 31 includes a base 311 fixed to the top of the machining table of the three-axis machine tool 1. A base 312 is fixed to the top of the base 311. Guide rail seats 313 are fixed to both ends of the top of the base 312. A slider 314 is slidably mounted on the upper end of the guide rail seat 313. Support arms 315 are rotatably mounted on the outer walls of both ends of the guide rail seat 313. An upper sliding groove 316 and a lower sliding groove 317 are respectively opened in the inner upper end and the inner lower end of the support arm 315. An upper cam 318 is rotatably mounted on the outer walls of both ends of the slider 314, and the upper cam 318 is located inside the upper sliding groove 316. A first cylinder 319 is installed in the middle of the base 311. A movable block 3110 is fixed to the output end of the first cylinder 319. A lower cam 3111 is rotatably mounted on both ends of the movable block 3110, and the lower cam 3111 is located inside the lower sliding groove 317.

[0028] The execution component 32 is mounted on the main body component 31 and is used to fix the workpiece 4.

[0029] The limiting component 33 is disposed on the main body component 31 and is used to limit the workpiece 4.

[0030] In this embodiment, after the workpiece 4 is positioned on the limiting component 33, the output end of the first cylinder 319 drives the movable block 3110 to move downward. The movable block 3110 drives the support arm 315 to rotate through the lower cam 3111 and the lower slide groove 317. The support arm 315 drives the slider 314 to move along the guide rail seat 313 through the upper slide groove 316 and the upper cam 318. The guide rail seat 313 drives the positioning head 322 to move horizontally through the mounting seat 321. The positioning heads 322 on both sides move in opposite directions synchronously, thereby centering and clamping the workpiece 4 between them. Moreover, the clamping or releasing action can be completed automatically without manual intervention.

[0031] Specifically, the limiting component 33 includes a limiting seat 331 disposed on the main component 31, with limiting rods 332 fixed at both ends of the top of the limiting seat 331, and a lifting component 34 disposed on the main component 31 for controlling the lifting and lowering of the limiting component 33.

[0032] In this embodiment, when the workpiece 4 is placed on the limiting seat 331, the limiting rod 332 is inserted into the round hole in the workpiece 4 to limit the workpiece 4 and prevent the workpiece 4 from rotating or shifting during the processing.

[0033] Specifically, the lifting assembly 34 includes a mounting plate 341 disposed on the main assembly 31, and a limiting seat 331 fixed to the top of the mounting plate 341. Guide rods 342 are fixed at the four corners of the bottom of the mounting plate 341, and the guide rods 342 are slidably installed through the base 312. Second cylinders 343 are installed at both the front and rear ends of the bottom of the base 312, and the output end of the second cylinders 343 is fixed to the mounting plate 341.

[0034] In this embodiment, the limiting component 33 on the mounting plate 341 is driven to rise and fall by the output end of the second cylinder 343. When the workpiece 4 is inverted and positioned, it is in the lowered state, and when the workpiece 4 is upright and fixed, it is in the raised state. This realizes the rapid switching of the lifting height of the limiting component 33 when positioning the workpiece 4, so as to satisfy the inverted or upright positioning of the workpiece 4.

[0035] Specifically, the limiting component 33 also includes a limiting groove 333 formed in the middle of the upper end of the limiting seat 331.

[0036] In this embodiment, when the workpiece 4 needs to be positioned upside down, the limiting groove 333 directly constrains the arc-shaped end of the workpiece 4 to avoid positioning deviation caused by instability of the center of gravity when upside down.

[0037] Specifically, the execution component 32 includes a mounting base 321 fixed to the top of the slider 314, and a positioning head 322 is mounted on the upper end of the mounting base 321.

[0038] In this embodiment, the positioning head 322 is fixed to the mounting base 321 by bolts, so that the positioning head 322 can be disassembled and replaced according to the specifications of the workpiece 4, thereby improving the versatility of the device.

[0039] Specifically, the clamping surface of the positioning head 322 is provided with a wear-resistant pad.

[0040] In this embodiment, damage to the surface of workpiece 4 caused by direct clamping is avoided.

[0041] The working principle and usage process of this utility model are as follows: First, the limit component 33 on the mounting plate 341 is driven to rise and fall by the output end of the second cylinder 343. When the workpiece 4 is inverted and positioned, it is in the lowered state; when the workpiece 4 is upright and fixed, it is in the raised state. This enables quick switching of the lifting height of the limit component 33 when positioning the workpiece 4, satisfying the inverted or upright positioning of the workpiece 4.

[0042] Then, when the workpiece 4 is placed on the limiting seat 331, the limiting rod 332 is inserted into the round hole in the workpiece 4 for limiting, so as to prevent the workpiece 4 from rotating or shifting during the processing; if the workpiece 4 needs to be positioned upside down, the arc end of the workpiece 4 is directly constrained by the limiting groove 333 to avoid positioning deviation caused by instability of the center of gravity when upside down.

[0043] Finally, the output end of the first cylinder 319 drives the movable block 3110 to move downward. The movable block 3110 drives the support arm 315 to rotate through the lower cam 3111 and the lower slide groove 317. The support arm 315 drives the slider 314 to move along the guide rail seat 313 through the upper slide groove 316 and the upper cam 318. The guide rail seat 313 drives the positioning head 322 to move horizontally through the mounting seat 321. The positioning heads 322 on both sides move in opposite directions synchronously, thereby centering and clamping the workpiece 4 between them. Moreover, the clamping or releasing action can be completed automatically without manual intervention.

[0044] 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.

[0045] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A milling and turning device for precision machining of automotive drive shafts, comprising a three-axis machine tool (1) and a workpiece (4), wherein a milling cutter (2) is mounted on the three-axis machine tool (1), characterized in that: The three-axis machine tool (1) is equipped with a positioning mechanism (3) for milling and turning workpiece (4). The positioning mechanism (3) includes: The main component (31) includes a base (311) fixed to the top of the machining table of the three-axis machine tool (1). A base (312) is fixed to the top of the base (311). Guide rail seats (313) are fixed to both ends of the top of the base (312). A slider (314) is horizontally slidably installed on the upper end of the guide rail seat (313). Support arms (315) are rotatably installed on the outer walls of both ends of the guide rail seat (313). Upper sliding grooves (316) are respectively opened in the inner upper and lower ends of the support arms (315). The upper cam (318) is rotatably mounted on the outer walls of both ends of the slider (314), and the upper cam (318) is located inside the upper slide groove (316). The first cylinder (319) is installed in the middle of the base (311). The output end of the first cylinder (319) is fixed with a movable block (3110). The lower cam (3111) is rotatably mounted on both ends of the movable block (3110), and the lower cam (3111) is located inside the slide groove (317). An execution component (32) is mounted on the main body component (31) and used to fix the workpiece (4); A limiting component (33) is disposed on the main component (31) and is used to limit the workpiece (4).

2. The milling and turning device for precision machining of automotive drive shafts according to claim 1, characterized in that: The limiting component (33) includes a limiting seat (331) disposed on the main component (31), and limiting rods (332) are fixed at both ends of the top of the limiting seat (331). A lifting component (34) is disposed on the main component (31) and is used to control the lifting of the limiting component (33).

3. The milling and turning device for precision machining of automotive drive shafts according to claim 2, characterized in that: The lifting assembly (34) includes a mounting plate (341) disposed on the main assembly (31), and a limiting seat (331) is fixed on the top of the mounting plate (341). Guide rods (342) are fixed at the four corners of the bottom of the mounting plate (341), and the guide rods (342) are slidably installed through the base (312). Second cylinders (343) are installed at both the front and rear ends of the bottom of the base (312), and the output end of the second cylinder (343) is fixed to the mounting plate (341).

4. The milling and turning device for precision machining of automotive drive shafts according to claim 2, characterized in that: The limiting component (33) also includes a limiting groove (333) formed in the middle of the upper end of the limiting seat (331).

5. The milling and turning device for precision machining of automotive drive shafts according to claim 1, characterized in that: The execution component (32) includes a mounting base (321) fixed to the top of the slider (314), and a positioning head (322) is mounted on the upper end of the mounting base (321).

6. The milling and turning device for precision machining of automotive drive shafts according to claim 5, characterized in that: The clamping surface of the positioning head (322) is provided with a wear-resistant pad.

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