Part special-shaped contour grinding device

Abstract

The utility model relates to a part special-shaped contour grinding device which comprises a base plate, a moving plate, a driving assembly used for driving the moving plate to move and a clamping assembly used for clamping a workpiece, the moving plate is slidably connected to the upper end face of the base plate, and the clamping assembly is arranged on the moving plate. The driving assembly comprises a profiling wheel, a lever amplifier, a synchronizing shaft and a speed reducing motor used for driving the synchronizing shaft to rotate, the speed reducing motor is fixedly arranged on the base plate, the synchronizing shaft is rotationally connected to the base plate, the rotating axis of the synchronizing shaft is perpendicular to the speed reducing motor, the speed reducing motor is coaxially and fixedly connected to one end of the speed reducing motor, and the profiling wheel is fixedly arranged on the synchronizing shaft; the middle of the lever amplifier is rotationally connected to the base plate, the first end of the lever amplifier abuts against the side wall of the profiling wheel, the second end of the lever amplifier is connected to the moving plate, and the clamping assembly is arranged on the moving plate.

Description

Technical Field

[0001] This application relates to the technical field of part grinding, and in particular to a device for grinding the special-shaped contour of parts. Background Art

[0002] The three-pivot universal joint has the advantages of simple structure, small size, light weight, good lubrication, fast heat dissipation, large load-bearing capacity and reliable operation, and is widely used in the front and rear drive axles of automobiles.

[0003] Among them, the PTJ structure three-pivot universal joint, as a small classification of the special-shaped structure three-pivot universal joint, brings certain technical difficulties to production and processing due to its unique elliptical cylindrical three-ear shaft design. The existing technical solution is to invest in special grinding ellipse equipment for processing. Due to the small market demand for the PTJ structure three-pivot universal joint, the equipment investment cost is high and the utilization rate of the special machine is low, resulting in high production costs and uncompetitive product prices in the market. There is no more flexible solution in the industry.

[0004] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0005] In order to solve the problem of high production cost of the PTJ structure three-pivot universal joint in the prior art, this application provides a device for grinding the special-shaped contour of parts.

[0006] A device for grinding the special-shaped contour of parts provided by this application adopts the following technical solution:

[0007] A device for grinding the special-shaped contour of parts includes a base plate, a moving plate, a driving component for driving the moving plate to move, and a clamping component for clamping the workpiece. The moving plate is slidably connected to the upper end surface of the base plate. The clamping component is arranged on the moving plate. The driving component includes a profiling wheel, a lever amplifier, a synchronous shaft, and a reduction motor for driving the synchronous shaft to rotate. The reduction motor is fixedly arranged on the base plate. The synchronous shaft is rotatably connected to the base plate. The rotation axis of the synchronous shaft is perpendicular to the movement direction of the moving plate. The reduction motor is coaxially and fixedly connected to one end of the synchronous shaft. The profiling wheel is fixedly arranged on the synchronous shaft. The middle part of the lever amplifier is rotatably connected to the base plate. The first end of the lever amplifier abuts against the side wall of the profiling wheel. The second end of the lever amplifier is connected to the moving plate. The clamping component is arranged on the moving plate.

[0008] By adopting the above technical solution, the clamping assembly fixes the workpiece to be machined. The reduction motor drives the synchronous shaft to rotate. During the rotation of the synchronous shaft, the profiling wheel rotates together with the synchronous shaft. The rotation of the profiling wheel drives the lever amplifier to move further, which drives the moving plate to move. The clamping mechanism drives the workpiece to rotate. Through the linkage of the feed of the grinding wheel headstock of the CNC cylindrical grinder and the reciprocating motion of the moving plate, the profiling grinding of the special-shaped outer circle contour is completed.

[0009] Optionally: The clamping assembly includes a hydraulic chuck, a precision main shaft for driving the hydraulic chuck to rotate, and a rotary cylinder. The rotary cylinder is arranged on the moving plate. The precision main shaft is rotatably connected to the rotary cylinder. One end of the precision main shaft is connected to the synchronous shaft through a synchronous belt, and the hydraulic chuck is arranged at the other end of the precision main shaft.

[0010] By adopting the above technical solution, the hydraulic chuck fixes the workpiece to be machined. During the process of the reduction motor driving the synchronous shaft to rotate, the precision main shaft is further driven to rotate through the synchronous belt, ensuring the rotational synchronism of the profiling wheel and the workpiece to be machined.

[0011] Optionally: A coupling is arranged at one end of the precision main shaft close to the synchronous belt.

[0012] By adopting the above technical solution, overload protection is provided for the precision main shaft, improving the service life of the precision main shaft.

[0013] Optionally: The clamping assembly further includes a center tailstock, and the central axis of the center tailstock coincides with the axis of the precision main shaft.

[0014] By adopting the above technical solution, further positioning of the workpiece to be machined is carried out, improving the stability during the machining process of the workpiece.

[0015] Optionally: A roller and a spring telescopic rod for adjusting the tightness of the synchronous belt are arranged on the substrate. The roller is arranged at the upper end of the spring telescopic rod, and the roller abuts against the synchronous belt downward.

[0016] By adopting the above technical solution, it is prevented that the synchronous belt derails between the two synchronous wheels, affecting the machining quality.

[0017] Optionally: A tension spring for driving the moving plate to reset is arranged between the moving plate and the substrate.

[0018] By adopting the above technical solution, the tension spring drives the moving plate to move towards the side close to the lever amplifier, realizing the reciprocating action of the moving plate.

[0019] Optionally, two slide rails are arranged on the substrate, two linear rail sliders for cooperating with the slide rails are arranged on the lower end surface of the moving plate, and the tension spring is arranged between the two slide rails.

[0020] By adopting the above technical solution, the moving stability of the moving plate is improved.

[0021] Optionally, a driven wheel is arranged at the first end of the lever amplifier, and the rotation axis of the driven wheel is parallel to the length direction of the lever amplifier.

[0022] By adopting the above technical solution, the friction between the lever amplifier and the profiling wheel is reduced.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. In the present application, the profiling grinding device is installed on a numerically controlled cylindrical grinder. Through the linkage of the feed of the grinding wheel head of the numerically controlled cylindrical grinder, the clamping of the workpiece by the precision spindle and the reciprocating movement of the moving plate, the profiling grinding of the special-shaped outer circle contour is completed.

[0025] 2. In the present application, by replacing the workpiece clamping method of the hydraulic chuck and the profiling wheel and cooperating with the numerically controlled cylindrical grinder, the grinding of the outer contour of various special-shaped parts can be realized.

[0026] 3. In the present application, the profiling wheel is amplified by the lever amplifier to improve the displacement accuracy of the workpiece. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of the second perspective of the embodiment of the present application.

[0029] In the figure, 1. Substrate; 11. Slide rail; 12. Support part; 2. Moving plate; 21. Linear slider; 22. Tension spring; 3. Driving assembly; 31. Synchronous shaft; 311. Second synchronous wheel; 32. Profiling wheel; 33. Lever amplifier; 331. Driven wheel; 34. Reduction motor; 35. Connection part; 4. Clamping assembly; 41. Rotary oil cylinder; 42. Hydraulic chuck; 421. First positioning part; 43. Precision spindle; 431. First synchronous wheel; 432. Coupling; 44. Tailstock; 441. Base; 442. Cylinder; 443. Second positioning part; 5. Adjusting assembly; 51. Roller; 52. Spring telescopic rod; 6. Synchronous belt. Detailed Description of the Embodiment

[0030] The following further describes the present application in detail with reference to the drawings.

[0031] A special-shaped contour grinding device for parts disclosed in the present application, as shown in Figure 1 and Figure 2 shown, includes a base plate 1, a moving plate 2, a driving component 3 for driving the moving plate 2 to move, and a clamping component 4 for clamping a workpiece. Two slide rails 11 are horizontally arranged on the base plate 1, and the two slide rails 11 are parallel to each other. Two linear sliders 21 for cooperating with the slide rails 11 are arranged on the lower end surface of the moving plate 2, and the two linear sliders 21 are respectively slidably connected to the two slide rails 11. The driving component 3 includes a profiling wheel 32, a lever amplifier 33, a synchronizing shaft 31, and a reduction motor 34 for driving the synchronizing shaft 31 to rotate. Two supporting parts 12 for supporting the synchronizing shaft 31 are arranged on the base plate 1, and the synchronizing shaft 31 is horizontally rotatably connected to the two supporting parts 12. The rotation axis of the synchronizing shaft 31 is perpendicular to the moving direction of the moving plate 2. The reduction motor 34 is fixedly arranged on the base plate 1, and the output shaft of the reduction motor 34 is coaxially and fixedly connected to the synchronizing shaft 31. The profiling wheel 32 is fixedly sleeved on the synchronizing shaft 31 and fixedly connected to the synchronizing shaft 31.

[0032] The middle part of the lever amplifier 33 is rotatably connected to the base plate 1, and the rotation axis of the lever amplifier 33 is parallel to the vertical axis. A driven wheel 331 is arranged at the first end of the lever amplifier 33, and the rotation axis of the driven wheel 331 is parallel to the length direction of the lever amplifier 33. The driven wheel 331 abuts against the side wall of the profiling wheel 32. During the rotation of the profiling wheel 32, the lever amplifier 33 is driven to rotate. A connecting part 35 is arranged at the second end of the lever amplifier 33, and the rotation axis of the lever amplifier 33 is close to the connecting part 35. The two ends of the connecting part 35 are respectively rotatably connected to the lever amplifier 33 and the moving plate 2, and the rotation axis of the connecting part 35 is parallel to the rotation axis of the lever amplifier 33. In order to improve the displacement accuracy of the workpiece, the lever amplifier 33 is a five-fold lever.

[0033] A tension spring 22 for driving the moving plate 2 to reset is arranged between the moving plate 2 and the base plate 1. The two ends of the tension spring 22 are respectively fixedly connected to the moving plate 2 and the base plate 1. The moving plate 2 is driven by the tension spring 22 to move towards the side away from the connecting part 35, so that the driven wheel 331 on the lever amplifier 33 always abuts against the profiling wheel 32.

[0034] The clamping assembly 4 includes a hydraulic chuck 42 for clamping the workpiece, a rotary cylinder 41 for driving the hydraulic chuck 42 to be rotatably connected to a precision spindle 43. The fixed cylinder part of the rotary cylinder 41 is fixedly arranged on the moving plate 2, and the precision spindle 43 is rotatably connected to the rotary cylinder 41. The rotation axis of the precision spindle 43 is parallel to the rotation axis of the synchronizing shaft 31. One end of the precision spindle 43 is provided with a first synchronous pulley 431, and the synchronizing shaft 31 is provided with a second synchronous pulley 311 for cooperating with the first synchronous pulley 431. The second synchronous pulley 311 and the first synchronous pulley 431 are connected by a synchronous belt 6. During the process of the driving motor driving the synchronizing shaft 31 to rotate, the precision spindle 43 is further driven to rotate. At the same time, the first synchronous pulley 431 and the second synchronous pulley 311 are in the same vertical plane, and the outer diameter dimensions of the first synchronous pulley 431 and the second synchronous pulley 311 are the same, ensuring the rotational synchronism between the precision spindle 43 and the synchronizing shaft 31.

[0035] Since the synchronous belt 6 will become loose during the movement of the moving plate 2, an adjusting assembly 5 for adjusting the tightness of the synchronous belt 6 is arranged on the base plate 1. The adjusting assembly 5 includes a spring telescopic rod 52 and a roller 51. The lower end of the spring telescopic rod 52 is fixedly arranged on the upper end surface of the base plate 1, and the roller 51 is rotatably connected to the upper end of the spring telescopic rod 52. The rotation axis of the roller 51 is parallel to the rotation axis of the synchronizing shaft 31. The roller 51 is arranged between the first synchronous pulley 431 and the second synchronous pulley 311, and the roller 51 abuts against the synchronous belt 6 downward under the action of the spring telescopic rod 52.

[0036] In order to prevent the precision spindle 43 from being stuck during rotation and affecting the equipment, a coupling 432 is arranged between the precision spindle 43 and the first synchronous pulley 431. The hydraulic chuck 42 is arranged on the rotary cylinder 41. The hydraulic chuck 42 is a double-axis chuck, and the jaws of the hydraulic chuck 42 are provided with a first positioning portion 421 for clamping the workpiece. The jaws of the hydraulic chuck 42 are driven by the rotary cylinder 41 to clamp the workpiece. One end of the precision spindle 43 away from the first synchronous pulley 431 is fixedly connected to the hydraulic chuck 42, and the rotation of the precision spindle 43 drives the hydraulic chuck 42 to rotate. A center tailstock 44 for cooperating with the hydraulic chuck 42 is arranged on the moving plate 2. The center tailstock 44 includes a base 441, a cylinder 442 and a second positioning portion 443. The base 441 is fixedly arranged on the moving plate 2, the cylinder part of the cylinder 442 is fixedly arranged on the base 441, the second positioning portion 443 is fixedly arranged on the telescopic rod of the cylinder 442, and the second positioning portion 443 is rotatably connected to the cylinder 442. The central axis of the second positioning portion 443 coincides with the central axis of the precision spindle 43.

[0037] The implementation principle of this embodiment is:

[0038] Install the profiling grinding device on a CNC cylindrical grinding machine, install the workpiece to be machined on the hydraulic chuck 42, start the air cylinder 442, and the two first positioning parts 421 and the second positioning part 443 on the hydraulic chuck 42 cooperate with each other to fix the workpiece. Start the reduction motor 34, the reduction motor 34 drives the synchronous shaft 31 to rotate. During the rotation of the profiling wheel 32, the moving plate 2 is driven by the lever amplifier 33. At the same time, the tension spring 22 drives the moving plate 2 to move towards the side close to the lever amplifier 33, realizing the reciprocating motion of the moving plate 2. During the rotation of the synchronous shaft 31, the precision main shaft 43 is driven to rotate synchronously by the synchronous belt 6. Through the linkage of the feed of the grinding wheel headstock of the CNC cylindrical grinding machine, the clamping of the workpiece by the precision main shaft 43, the rotation and the reciprocating motion of the moving plate 2, the profiling grinding of the special-shaped outer circle contour is completed. At the same time, by changing the workpiece clamping method of the hydraulic chuck 42 and the profiling wheel 32, and cooperating with the CNC cylindrical grinding machine, the grinding of the outer contour of various special-shaped parts can be realized.

[0039] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A grinding device for the special-shaped contour of parts, characterized in that: It includes a substrate (1), a moving plate (2), a driving component (3) for driving the moving plate (2) to move, and a clamping component (4) for clamping a workpiece. The moving plate (2) is slidably connected to the upper end surface of the substrate (1). The clamping component (4) is arranged on the moving plate (2). The driving component (3) includes a profiling wheel (32), a lever amplifier (33), a synchronous shaft (31), and a reduction motor (34) for driving the synchronous shaft (31) to rotate. The reduction motor (34) is fixedly arranged on the substrate (1). The synchronous shaft (31) is rotatably connected to the substrate (1). The rotation axis of the synchronous shaft (31) is perpendicular to the movement direction of the moving plate (2). The reduction motor (34) is coaxially and fixedly connected to one end of the synchronous shaft (31). The profiling wheel (32) is fixedly arranged on the synchronous shaft (31). The middle part of the lever amplifier (33) is rotatably connected to the substrate (1). The first end of the lever amplifier (33) abuts against the side wall of the profiling wheel (32). The second end of the lever amplifier (33) is connected to the moving plate (2). The clamping component (4) is arranged on the moving plate (2).

2. The special-shaped contour grinding device for a part according to claim 1, characterized in that: The clamping component (4) includes a hydraulic chuck (42), a precision spindle (43) for driving the hydraulic chuck (42) to rotate, and a rotary cylinder (41). The rotary cylinder (41) is arranged on the moving plate (2). The precision spindle (43) is rotatably connected to the rotary cylinder (41). One end of the precision spindle (43) is connected to the synchronous shaft (31) through a synchronous belt (6). The hydraulic chuck (42) is arranged at the other end of the precision spindle (43).

3. A special-shaped contour grinding device for parts according to claim 2, characterized in that: A coupling (432) is arranged at one end of the precision spindle (43) close to the synchronous belt (6).

4. A special-shaped contour grinding device for parts according to claim 2, characterized in that: The clamping component (4) further includes a center tailstock (44). The central axis of the center tailstock (44) coincides with the axis of the precision spindle (43).

5. A special-shaped contour grinding device for parts according to claim 2, characterized in that: A roller (51) and a spring telescopic rod (52) for adjusting the tightness of the synchronous belt (6) are arranged on the substrate (1). The roller (51) is arranged at the upper end of the spring telescopic rod (52). The roller (51) abuts against the synchronous belt (6) downward.

6. The special-shaped contour grinding device for a part according to claim 1, characterized in that: A tension spring (22) for driving the moving plate (2) to reset is arranged between the moving plate (2) and the substrate (1).

7. An irregular contour grinding device for parts according to claim 6, characterized in that: Two slide rails (11) are arranged on the substrate (1). Two linear sliders (21) for cooperating with the slide rails (11) are arranged on the lower end surface of the moving plate (2). The tension spring (22) is arranged between the two slide rails (11).

8. A special-shaped contour grinding device for parts according to claim 1, characterized in that: A driven wheel (331) is arranged at the first end of the lever amplifier (33). The rotation axis of the driven wheel (331) is parallel to the length direction of the lever amplifier (33).

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