Clamp for accurate grinding of right-angle measuring tool workpiece

Abstract

The utility model relates to a clamp for accurate grinding of a right-angle measuring tool workpiece. The clamp comprises a base, a pressing plate and a top plate. The base is L-shaped, a plurality of vacuum chucks are embedded in the bottom surface of the positioning groove at intervals, and the bottom of each vacuum chuck is connected to a vacuum generator; two limiting tables are arranged on the base, supporting blocks are fixed to the tops of the two limiting tables respectively, the two ends of the top plate are fixed to the two supporting blocks respectively, guide rods arranged in the vertical direction are fixed between the two supporting blocks and the top plate respectively, the pressing plate is located between the base and the top plate, and the two ends of the pressing plate are slidably connected to the two guide rods in a sleeving mode respectively; and the top plate is connected with a pressing driver. The base is matched with the pressing plate, the right-angle measuring tool to be machined is pressed and positioned under the combined action of the L-shaped upper clamping face and the L-shaped lower clamping face, and clamping is reliable; a vertical pressure is provided through a vacuum negative pressure adsorption force mode, so that the horizontal plane static friction force of the right-angle measuring tool to be machined is improved, and a workpiece is stably clamped on the clamp.

Description

Technical Field

[0001] This utility model relates to the field of right-angle measuring tool processing technology, specifically to a fixture for precision grinding of right-angle measuring tool workpieces. Background Technology

[0002] High-precision right-angle measuring tools are important accuracy testing tools, characterized by high precision, corrosion resistance, and wear resistance. Currently, automated clamping of right-angle measuring tool grinding equipment faces several challenges: 1. The surface to be machined on the right-angle measuring tool is relatively thin. During grinding, the contact area between the grinding head and the workpiece is small; 2. The available clamping surface of the right-angle measuring tool is limited. To improve workpiece shape accuracy, right-angle measuring tool processing equipment only performs one clamping operation. However, the working surface of the right-angle measuring tool occupies four directions, and the fixing method can only act on the remaining two directions, which only serve a positioning function. Therefore, it is urgently necessary to design a clamping device suitable for dedicated right-angle measuring tool grinding equipment. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fixture for precision grinding of right-angle measuring tool workpieces.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fixture for precision grinding of right-angle measuring tool workpieces includes a base, a pressure plate, and a top plate;

[0006] The base is L-shaped, with protruding limiting platforms at both ends of the top of the base. A positioning groove for placing the right-angle measuring tool to be processed is formed between the two limiting platforms and the top of the base. Multiple vacuum suction cups are embedded at intervals on the bottom surface of the positioning groove, and the bottom of each vacuum suction cup is connected to a vacuum generator.

[0007] The top of each of the two limiting platforms is fixed with a support block. The two ends of the top plate are fixed to the two support blocks. A guide rod is fixed between the two support blocks and the top plate. The pressure plate is located between the base and the top plate, and the two ends of the pressure plate are slidably sleeved on the two guide rods. A return spring sleeved on the guide rod is connected between the top plate and the support block.

[0008] A pressure driver is connected to the top plate. The lower end of the pressure driver abuts against the top surface of the pressure plate. The pressure driver drives the pressure plate to move down and press the right-angle measuring tool to be processed.

[0009] Furthermore, the downward drive is a thrust threaded rod threadedly connected to the top plate.

[0010] Furthermore, the bottom of the pressure plate has a toothed pressing portion.

[0011] Furthermore, both the top plate and the pressure plate are L-shaped.

[0012] The present invention adopts the above technical solution and has the following beneficial effects:

[0013] 1. This utility model uses a base and a pressure plate to work together, and the upper and lower L-shaped clamping surfaces work together to clamp and position the right-angle measuring tool to be processed, ensuring reliable clamping;

[0014] 2. A vertical pressure is provided by vacuum negative pressure adsorption, thereby increasing the static friction of the horizontal surface of the right-angle measuring tool to be processed, so that the workpiece is stably clamped on the fixture. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the base. Detailed Implementation

[0019] like Figure 1-3 As shown, this utility model discloses a fixture for precision grinding of right-angle measuring tools, comprising an L-shaped base 1, a pressure plate 2, and a top plate 3. The top of the base 1 has protruding limiting platforms 11 at both ends, forming a positioning groove 12 between the two limiting platforms 11 and the top of the base 1 for placing the right-angle measuring tool 9 to be processed. Multiple vacuum suction cups 4 are embedded at intervals on the bottom surface of the positioning groove 12, and the bottom of each vacuum suction cup 4 is connected to a vacuum generator (EV-05 type) via a pipe.

[0020] The tops of the two limiting platforms 11 are respectively fixed with support blocks 5 by bolts. The two ends of the top plate 3 are respectively fixed to the two support blocks 5. The two support blocks 5 and the top plate 3 are respectively fixed with guide rods 6 arranged vertically. The pressure plate 2 is located between the base 1 and the top plate 3, and the two ends of the pressure plate 2 are respectively slidably sleeved on the two guide rods 6. The top plate 3 and the support blocks 5 are connected with return springs 7 (in the compressed state) sleeved on the guide rods 6. The bottom of the pressure plate 2 has a toothed pressing part. A pressing driver is connected to the top plate 3. The lower end of the pressing driver abuts against the top surface of the pressure plate 2. The pressing driver drives the pressure plate 2 to move down and press the right angle measuring tool 9 to be processed.

[0021] In this invention, the downward pressure driver is a thrust threaded rod 8 that is threadedly connected to the top plate 3.

[0022] The working principle of this utility model is as follows: The right-angle measuring tool 9 to be processed is placed in the positioning groove 12 of the base 1, with one end of the tool abutting against the corresponding limiting platform 11 (the other end has some clearance). At this time, the vacuum generator is turned on, and the vacuum pressure is adjusted to between 0.08-0.1 MPa. The vacuum generator evacuates the air, and the vacuum suction cup 4 picks up the right-angle measuring tool 9. The thrust threaded rod 8 is rotated clockwise, pushing the pressure plate 2 downwards. The pressure plate 2 presses and fixes the right-angle measuring tool 9, completing the clamping action. After the fine grinding process of the right-angle measuring tool 9 is completed, the thrust threaded rod 8 is rotated counterclockwise. At this time, the pressure plate is pushed away from the right-angle measuring tool 9 by the return spring 7, completing the unloading action.

[0023] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A jig for precision grinding of a workpiece of a square gage, characterized by: The base, the pressing plate and the top plate are included; The base is L-shaped, and the top of the base is provided with two protruding limiting tables at two ends, respectively, and a positioning groove for placing a right-angle gauge to be processed is formed between the two limiting tables and the top of the base, the bottom surface of the positioning groove is provided with a plurality of vacuum suction cups at intervals, and the bottom of each vacuum suction cup is connected to a vacuum generator, respectively; The top of each of the two limiting tables is fixed with a supporting block, the two ends of the top plate are fixed on the two supporting blocks, respectively, a guide rod arranged in the vertical direction is fixed between each of the two supporting blocks and the top plate, the pressing plate is located between the base and the top plate, and the two ends of the pressing plate are slidingly sleeved on the two guide rods, respectively, a return spring sleeved on the guide rod is connected between the top plate and the supporting block; The top plate is connected with a downward pressing driver, the lower end of the downward pressing driver abuts against the top surface of the pressing plate, and the downward pressing driver drives the pressing plate to move downward to press the right-angle gauge to be processed.

2. The fixture for precision grinding of a workpiece according to claim 1, wherein: The downward pressing driver is a thrust threaded rod screwed on the top plate.

3. The fixture for precision grinding of a workpiece according to claim 1, wherein: The bottom of the pressing plate has a tooth-shaped downward pressing part.

4. The fixture for precision grinding of a workpiece according to claim 1, wherein: The top plate and the pressing plate are also L-shaped.

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