Worktable for super-precision machining of metal parts

Abstract

The utility model discloses a work table is used in super -precision processing of metal parts, including base, the support seat of inverted L type in the base one side, the upper surface one side of base is equipped with the placing seat, and the one side equipped with rotating motor of support seat, and the output of rotating motor is equipped with the threaded rod, and the threaded rod extends to the one side of placing seat, and the threaded connection of threaded rod has the sliding block, and the first hydraulic push rod of passing through support seat is connected with polishing motor at the bottom of sliding block, and the bottom of polishing motor is equipped with the polishing grinding wheel, the utility model discloses the polishing assembly of movable type is realized to the fixed part to be processed and is polished, and the whole process is higher in stability, under the clamping effect of multiple hydraulic cylinders and the stable effect of polishing motor, the impact influence of vibration in polishing process is maximized to reduce, reduces the grinding vibration, and the metal parts of higher precision requirement have good processing effect.

Description

Technical Field

[0001] This utility model relates to the field of metal manufacturing technology, specifically to a worktable for ultra-precision machining of metal parts. Background Technology

[0002] In the ultra-precision machining of metal parts, the worktable (or "machine tool worktable") is one of the core components to ensure machining accuracy. It needs to have high rigidity, high stability, excellent vibration reduction performance, and nanometer-level motion accuracy.

[0003] During the machining process, the worktable is mainly used to place the workpiece to be processed. Therefore, the flatness of the worktable directly affects the machining accuracy of the workpiece. At the same time, the precision of the mating parts in the machining process, such as the grinding wheel, will also affect the machining accuracy of the workpiece. Taking the grinding table as an example, since existing grinding tables generally have the grinding wheel motor fixed in place and the grinding process is achieved by transporting the workpiece, this may cause vibration during the workpiece movement and grinding process, resulting in certain errors.

[0004] For example, utility model patent CN217097064U discloses a grinding device for precision metal parts processing, including a worktable. Support legs are fixedly installed at the four corners of the lower surface of the worktable. A grinding machine body is fixedly installed on the upper surface of the worktable, and a grinding wheel is mounted on the machine body. A feeding mechanism is fixedly installed on one side of the grinding machine body on the upper surface of the worktable. The feeding mechanism includes a positioning bracket, a movable slide rail, a sliding platform, a movable slider, and a movable groove. A positioning mechanism is fixedly installed on the sliding platform. The positioning mechanism includes a positioning frame, a movable groove, a lead screw slider, a positioning vise, a drive lead screw, and a servo motor. The positioning bracket is fixedly installed on the worktable, and a movable slide rail is fixedly installed at the top of the positioning bracket. The movable slide rail has a movable groove. This product belongs to the field of grinding devices and can improve grinding accuracy. However, this product does not effectively solve the aforementioned problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a worktable for ultra-precision machining of metal parts.

[0006] The technical solution of this utility model is:

[0007] A worktable for ultra-precision machining of metal parts includes a base and an inverted L-shaped support seat located on one side of the base;

[0008] The upper surface of the base is provided with a placement seat for placing the metal parts to be processed on one side, and a rotating motor is provided on one side of the support seat. The output end of the rotating motor is provided with a threaded rod, which extends to the side where the placement seat is located. A slider is threadedly connected to the threaded rod. The bottom of the slider is connected to a grinding motor through a first hydraulic push rod that passes through the support seat. A grinding wheel is provided at the bottom of the grinding motor.

[0009] The upper surface of the base is provided with several hydraulic cylinders around the placement seat, and the output end of the hydraulic cylinders points to the placement seat for positioning the metal parts to be processed.

[0010] Furthermore, the base corresponding to the bottom of the placement seat has a cavity inside, and a drive motor is provided at the bottom of the cavity. The top output shaft of the drive motor is fixedly connected to the bottom of the placement seat for driving the placement seat to rotate.

[0011] Explanation: The position of the part to be processed is adjusted by driving the motor, thereby achieving accurate positioning and grinding.

[0012] Furthermore, a positioning plate is provided at the end of the output shaft of the hydraulic cylinder, and the positioning plate is connected to the output shaft of the hydraulic cylinder via a hinge shaft.

[0013] Explanation: The positioning plate positions the workpiece to be processed, and multiple hydraulic cylinders can distribute stress, reduce vibration during grinding, and improve grinding accuracy.

[0014] Furthermore, the support base at the bottom of the threaded rod is provided with a strip groove, the first hydraulic push rod passes through the strip groove, and the two sides of the slider are slidably engaged with the two sides of the strip groove.

[0015] Explanation: The slider is engaged with the slot, allowing it to move as the threaded rod rotates.

[0016] Furthermore, a second hydraulic push rod is provided on one side of the grinding motor, and the end of the second hydraulic push rod is fixedly connected to the upper surface of the base.

[0017] Note: The second hydraulic push rod helps to stabilize the grinding motor, thereby improving grinding accuracy.

[0018] Furthermore, the end of the threaded rod is rotatably connected to the side wall of the baffle located on the upper surface of the support.

[0019] Note: The baffle is used to maintain the stability of the threaded rod during rotation.

[0020] Furthermore, the number of hydraulic cylinders is 4 to 8.

[0021] Note: Hydraulic cylinders can be installed as many as possible within the capacity, even if not all of them are used during positioning.

[0022] Furthermore, a vacuum hose and an air blowing hose are provided on the upper surface of the base corresponding to the front side of the placement seat.

[0023] Note: By using a vacuum hose and an air hose together, the polished surface is kept clean during the polishing process, thereby further improving the polishing precision.

[0024] The beneficial effects of this utility model are:

[0025] This utility model discloses a worktable for ultra-precision machining of metal parts. It uses a movable grinding component to grind fixed parts to be processed. The whole process is highly stable. Under the clamping action of multiple hydraulic cylinders and the stabilizing effect of the grinding motor, the impact of vibration during grinding is minimized, reducing grinding vibration. It has a good processing effect for metal parts with high precision requirements. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a worktable for ultra-precision machining of metal parts according to this utility model;

[0027] Figure 2 This is a schematic diagram of the lower structure of a worktable for ultra-precision machining of metal parts according to this utility model;

[0028] Figure 3 This is a front view of a worktable for ultra-precision machining of metal parts according to this utility model;

[0029] Figure 4 This is a top view of a worktable for ultra-precision machining of metal parts according to this utility model;

[0030] Figure 5 This is a schematic diagram of the hydraulic cylinder and positioning plate of a worktable for ultra-precision machining of metal parts according to this utility model.

[0031] Among them, 1-base, 11-cavity, 12-drive motor, 13-vacuum hose, 14-air blowing hose, 2-support seat, 21-strip groove, 22-baffle, 3-placement seat, 4-rotation motor, 41-threaded rod, 5-slider, 6-first hydraulic push rod, 7-grinding motor, 71-grinding wheel, 8-hydraulic cylinder, 81-positioning plate, 82-hinge shaft, 9-second hydraulic push rod Detailed Implementation

[0032] Example 1

[0033] like Figure 1 As shown, a worktable for ultra-precision machining of metal parts includes a base 1 and an inverted L-shaped support 2 located on one side of the base 1.

[0034] like Figures 2-4 As shown, a placement seat 3 for placing metal parts to be processed is provided on one side of the upper surface of the base 1. A rotating motor 4 is provided on one side of the support seat 2. The rotating motor 4 is a commercially available gear reduction motor. The output end of the rotating motor 4 is provided with a threaded rod 41. The threaded rod 41 extends to the side where the placement seat 3 is located. The end of the threaded rod 41 is rotatably connected to the side wall of the baffle 22 located on the upper surface of the support seat 2. A slider 5 is threadedly connected to the threaded rod 41. The bottom of the slider 5 is connected to a grinding motor 7 through a first hydraulic push rod 6 that passes through the support seat 2. A strip groove 21 is provided on the support seat 2 at the bottom of the threaded rod 41. The first hydraulic push rod 6 passes through the strip groove 21. The two sides of the slider 5 are slidably engaged with the two sides of the strip groove 21. A grinding wheel 71 is provided at the bottom of the grinding motor 7. A second hydraulic push rod 9 is provided on one side of the grinding motor 7. The end of the second hydraulic push rod 9 is fixedly connected to the upper surface of the base 1. Both the first hydraulic push rod 6 and the second hydraulic push rod 9 are commercially available electro-hydraulic push rods.

[0035] like Figure 1 , 3 As shown in Figure 5, six hydraulic cylinders 8 are provided around the placement seat 3 on the upper surface of the base 1. The output shaft of the hydraulic cylinder 8 is provided with a positioning plate 81. The positioning plate 81 is connected to the output shaft of the hydraulic cylinder 8 through a hinge shaft 82. The hydraulic cylinder 8 is a commercially available small hydraulic cylinder. The output end of the hydraulic cylinder 8 points to the placement seat 3 for positioning the metal parts to be processed. The bottom of the placement seat 3 is provided with a cavity 11 inside the base 1. The bottom of the cavity 11 is provided with a drive motor 12. The drive motor 12 is a commercially available gear reduction motor. The top output shaft of the drive motor 12 is fixedly connected to the bottom of the placement seat 3 for driving the placement seat 3 to rotate. The upper surface of the base 1 is provided with a dust suction hose 13 and an air blowing hose 14 on the front side of the placement seat 3. The dust suction hose 13 and the air blowing hose 14 are respectively connected to an external air pump through the inside of the base 1.

[0036] Example 2

[0037] The difference between this embodiment and Embodiment 1 is that:

[0038] Four hydraulic cylinders 8 are arranged around the seat 3 on the upper surface of the base 1.

[0039] Example 3

[0040] The difference between this embodiment and Embodiment 1 is that:

[0041] Eight hydraulic cylinders 8 are arranged around the seat 3 on the upper surface of the base 1.

[0042] Working principle:

[0043] The working principle of a worktable for ultra-precision machining of metal parts according to this utility model is briefly explained below. When in use, the metal part to be ground is first placed on the placement seat 3. The positioning plate 81 at the end of the extended output end contacts and clamps the surface of the metal part. Any number of positioning plates 81 in suitable positions can be selected for clamping. The bottom surface of the positioning plate 81 has strong friction. After clamping, the drive motor 12 is turned on to drive the placement seat 3 to rotate until it reaches the position to be ground.

[0044] Then, the rotating motor 4 is turned on, causing the threaded rod to rotate. This causes the slider 5 to slide under the action of the thread, allowing the first hydraulic push rod 6 to drive the grinding motor 7 to move towards the part to be processed. Simultaneously, the second hydraulic push rod 9 assists in maintaining stability. When approaching the part, the moving speed is slowed down. Finally, grinding is completed by adjusting the height of the first hydraulic push rod 6 and the left-right position of the slider 5. At the same time, the dust suction hose 13 and the air blowing hose 14 are used to suck up the debris generated during grinding, further improving the grinding accuracy. The grinding motor 7 drives the grinding wheel 71 to rotate. The linear velocity of the movement is 35-50 m / s. The feed rate (fine grinding feed 0.005-0.02 mm / stroke) and depth of cut (≤0.01 mm) are reduced. The grinding wheel 71 is a resin-bonded grinding wheel. Vibration feedback is achieved by installing an acceleration sensor (such as a PCB piezoelectric sensor) on the base 1 and analyzing the vibration spectrum through FFT to suppress the main frequency band (such as 50-200 Hz). Dynamic balance correction is performed during grinding, and the rotation speed is adjusted to avoid the natural frequency. In addition, the lubrication between the slider 5 and the groove 21 needs to be checked weekly, and the sensor needs to be calibrated monthly.

Claims

1. A worktable for ultra-precision machining of metal parts, characterized in that, Includes a base (1) and an inverted L-shaped support (2) located on one side of the base (1); The base (1) has a placement seat (3) for placing metal parts to be processed on one side of its upper surface. The support seat (2) has a rotating motor (4) on one side. The output end of the rotating motor (4) has a threaded rod (41). The threaded rod (41) extends to the side where the placement seat (3) is located. A slider (5) is threadedly connected to the threaded rod (41). The bottom of the slider (5) is connected to a grinding motor (7) through a first hydraulic push rod (6) that passes through the support seat (2). The bottom of the grinding motor (7) has a grinding wheel (71). The upper surface of the base (1) is provided with several hydraulic cylinders (8) around the placement seat (3), and the output end of the hydraulic cylinders (8) points to the placement seat (3) for positioning the metal parts to be processed.

2. The worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The base (1) corresponding to the bottom of the placement seat (3) has a cavity (11) inside. A drive motor (12) is provided at the bottom of the cavity (11). The top output shaft of the drive motor (12) is fixedly connected to the bottom of the placement seat (3) to drive the placement seat (3) to rotate.

3. The worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The hydraulic cylinder (8) has a positioning plate (81) at the end of its output shaft. The positioning plate (81) is connected to the output shaft of the hydraulic cylinder (8) via a hinge shaft (82).

4. The worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The support seat (2) at the bottom of the threaded rod (41) is provided with a strip groove (21), the first hydraulic push rod (6) passes through the strip groove (21), and the slider (5) is slidably engaged with the two sides of the strip groove (21).

5. A worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The grinding motor (7) is provided with a second hydraulic push rod (9) on one side, and the end of the second hydraulic push rod (9) is fixedly connected to the upper surface of the base (1).

6. A worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The end of the threaded rod (41) is rotatably connected to the side wall of the baffle (22) located on the upper surface of the support (2).

7. A worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, There are 4 to 8 hydraulic cylinders (8).

8. A worktable for ultra-precision machining of metal parts according to claim 1, characterized in that, The upper surface of the base (1) is provided with a vacuum hose (13) and an air blowing hose (14) corresponding to the front side of the placement seat (3).

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