Self-adaptive pressing device for multiple workpieces

Abstract

The utility model discloses a self-adaptive pressing device for multiple workpieces. The self-adaptive pressing device comprises a positioning plate, an arc-shaped pressing block, a clamping device, a pressing plate and a bottom plate, the positioning plate is fixed on the bottom plate; the front end of the pressing plate is rotationally connected with the bottom plate; a plurality of inner arc grooves are formed in the bottom of the arc-shaped pressing block, the clamping device is installed in the inner arc grooves in the bottom of the arc-shaped pressing block, and the arc-shaped pressing block is installed on the inner arc face of the pressing plate. The clamp holder is in line contact with the inner arc-shaped groove; the inner arc-shaped surface of the pressing plate is in line contact with the outer arc-shaped surface of the arc-shaped pressing plate; the pressing plate and the positioning plate are matched to press the workpiece. The pressing force can be automatically adjusted, under the condition that the pressing of the platy pressing plate is not changed, the pressing force is evenly distributed on a plurality of workpieces with slightly different sizes through a self-adjusting mechanism of the pressing fulcrum, and it is guaranteed that each workpiece can be pressed. The problem that multiple workpieces with small size differences and regular shapes are pressed at the same time is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a self-adaptive clamping device for multiple workpieces. Background Art

[0002] During the machining or storage of workpieces with relatively regular shapes, it is often necessary to clamp multiple workpieces of the same type at the same time. A common positioning method is to set a positioning element at the bottom of the fixture and fix the upper part of the fixture with a plate-like pressure plate. However, each workpiece may have different sizes. During the pressing process of the plate-like pressure plate, some workpieces are clamped and fixed by the pressure plate, while other workpieces with slightly smaller sizes cannot be clamped due to their slightly smaller sizes. It is impossible to ensure that multiple workpieces are clamped at the same time, and subsequent processing, production or storage positioning cannot be carried out.

[0003] Usually, the lower part of the fixture is positioned and the upper plate-shaped pressure plate is used for clamping. Due to the tolerance of the workpiece size, the positioning part and the clamping part of the fixture are rigidly connected and have no adjustment link. This cannot ensure that multiple workpieces are clamped at the same time, or the clamping force of each workpiece varies greatly. If the clamping force is too large, deformation will occur, and the size will be out of tolerance after processing; if the clamping force is too small, displacement will occur during the cutting process, causing damage to the tool or scrapping of parts. Utility Model Content

[0004] The utility model provides a multiple workpiece self-adaptive clamping device, and aims to solve the technical problem of simultaneously clamping multiple workpieces with similar sizes and regular shapes.

[0005] In order to solve the above technical problems, the utility model provides a self-adaptive clamping device for multiple workpieces, characterized in that: it includes a positioning plate 4, an arc-shaped pressure block 8, a clamp 9, a pressure plate 10, and a base plate 15; the positioning plate 4 is fixed on the base plate 15; the front end of the pressure plate 10 is rotatably connected to the base plate, and the rear end is fixed to the base plate; a plurality of inner arc grooves are provided at the bottom of the arc-shaped pressure block 8, the clamp is installed in the inner arc groove at the bottom of the arc-shaped pressure block 8, and the arc-shaped pressure block 8 is installed on the inner arc surface of the pressure plate 10; the clamp is in line contact with the inner arc groove, and the inner arc surface of the pressure plate is in line contact with the outer arc surface of the arc-shaped pressure plate; the pressure plate 10 cooperates with the positioning plate 4 to clamp the workpiece.

[0006] Furthermore, the support II, the positioning plate, and the support I are fixed on the bottom plate in sequence from front to back; the front end of the pressure plate is rotatably connected to the fixed support II, and the rear end is connected to the support I.

[0007] Furthermore, the matching surfaces between the arc-shaped pressing block and the pressing plate are arc-shaped structures.

[0008] Furthermore, the clamp is mounted on the arc-shaped pressing block through a cylindrical pin.

[0009] Furthermore, the outer shape of the clamp is a curved surface structure, which matches the inner arc groove.

[0010] Furthermore, the arc outer diameter of the clamper is smaller than the arc radius of the inner arc groove.

[0011] Furthermore, the inner arc size of the pressing plate is larger than the outer arc size of the arc-shaped pressing plate.

[0012] Furthermore, the arc-shaped pressing block is mounted on the pressing plate through a cylindrical pin.

[0013] Furthermore, a positioning block is installed in the positioning hole at the bottom of the clamp.

[0014] Furthermore, the front end of the pressing plate is rotatably connected to the support II through a hinge shaft, and the rear end of the pressing plate is fastened to the support I through a bolt equipped with a spring.

[0015] Beneficial effect: The utility model can automatically adjust the clamping force. Without changing the clamping of the plate-shaped clamping plate, the clamping force is evenly distributed on multiple workpieces with slightly different sizes through the self-adjusting mechanism of the clamping fulcrum, ensuring that each workpiece can be clamped. This solves the problem of simultaneously clamping multiple workpieces with similar sizes and regular shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is the left view.

[0018] In the figure, bolt 1, support II2, articulated shaft 3, positioning plate 4, positioning pressure block 5, cylindrical pin 6, cylindrical pin 7, arc pressure block 8, clamp 9, pressure plate 10, nut 11, spring 12, bolt 13, support I14, base plate 15, screw 16, washer 17, cotter pin 18, key 19. DETAILED DESCRIPTION

[0019] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below.

[0020] The utility model proposes a multiple workpiece adaptive clamping device, comprising a support II2, a hinge shaft 3, a positioning plate 4, an arc-shaped pressing block 8, a clamp 9, a pressing plate 10, a spring 12, a support I14, and a bottom plate 15;

[0021] Use bolts 1 to fasten support II2, positioning plate 4, support I14 on bottom plate 15 from front to back in sequence, cool positioning block 5 and press fit it into the positioning hole at the bottom of clamp 9, then use cylindrical pin 6 to install the clamp in the groove at the bottom of arc block 8, and use cylindrical pin 7 to install arc block 8 with clamp on the inner arc surface of pressure plate 10; the front end of pressure plate 10 with arc block is rotatably connected with support II2 through a hinge shaft, and a washer 17 is installed at one end of the hinge shaft, and it is limited and fastened with cotter pin 18. Put spring 12 on bolt 13, pass bolt 13 with spring through the press-fit hole at the rear end of pressure plate 10, and fasten bolt 13 with nut 11. Fasten bolt 13 to support I14 through hinge shaft, then install washer 17, and fasten with cotter pin 18.

[0022] The arc-shaped pressing block 8 is a hemispherical structure with a plurality of inner arc grooves at its bottom. The outer shape of the clamp is an arc surface structure, which cooperates with the inner arc grooves and is in line contact. The outer diameter of the arc is smaller than the arc radius of the inner arc grooves.

[0023] The arc matching dimensions of the clamp and the arc-shaped pressing block, as well as the arc matching dimensions of the arc-shaped pressing block and the pressing plate are all inconsistent, and the inner arc dimension of the arc-shaped pressing plate is ensured to be slightly larger than the outer arc dimension of the clamp. Similarly, the inner arc dimension of the pressing plate is ensured to be slightly larger than the outer arc dimension of the arc-shaped pressing plate. This ensures that when the two arcs are fastened together with cylindrical pins, the two are in line contact, and the supporting points of the line contact can rotate freely when the two ends are subjected to force. In this way, the size of the supporting force at the two ends can be automatically adjusted until the force at the two ends is consistent.

[0024] The nuts 20 and the pressure plate are used for uniform compression, and the self-adjusting compression structure ensures that the compression force acting on each workpiece is uniform.

[0025] The working principle and working process of the utility model are as follows:

[0026] 1. Loosen the nut 11 by rotating it counterclockwise. Under the force of the spring 12, the pressure plate 10 with the clamp moves upward and separates from the positioning plate 4;

[0027] 2. Horizontally load the workpieces with inconsistent outer diameter tolerances into the positioning grooves of the positioning plate 4, then rotate the nut 11 clockwise to tighten the pressing plate 10, and the pressing plate 10 moves downward, and at the same time, the positioning pressing block 5 first presses the parts with slightly larger dimensions. After the positioning pressing block 5 at one end is pressed, the clamp 9 and the arc pressing block 8 are automatically adjusted to press the parts with slightly smaller dimensions at the other end through the fulcrum of line contact. At the same time, the arc pressing block 8 in line contact and the inner arc of the pressing plate 10 are automatically adjusted to ensure that the two clamps 9 are pressed at the same time. At the same time, during the pressing process, the multi-point floating support structure can ensure that the clamping force of each positioning pressing block 5 on the workpiece is consistent, so that the clamping force on the pressing plate 10 is evenly applied to each workpiece that needs to be pressed.

[0028] Each gripper has a workpiece on each side.

[0029] Two positioning elements with inconsistent arc radii are connected together by positioning pins to maintain line contact between the two positioning parts. In this way, when one end is subjected to an upward supporting force, it will be transmitted to the other end of the supporting point through the line contact supporting point until the supporting force at both ends is completely consistent.

[0030] The utility model can realize the clamping of multiple workpieces with inconsistent dimensional tolerances by tightening one pressing plate, and can ensure the uniformity of the clamping force of each workpiece, realize the rapid positioning and clamping of multiple workpieces with regular shapes, and can also realize the simultaneous loosening of multiple parts when disassembling parts, thereby making the clamping and disassembly of parts faster and more efficient, and easier to operate.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multiple workpiece adaptive clamping device, characterized in that: It includes a positioning plate, an arc-shaped pressure block, a clamp, a pressure plate, and a base plate; the positioning plate is fixed on the base plate; the front end of the pressure plate is rotatably connected to the base plate, and the rear end is fixed to the base plate; a plurality of inner arc grooves are provided at the bottom of the arc-shaped pressure block, the clamp is installed in the inner arc grooves at the bottom of the arc-shaped pressure block, and the arc-shaped pressure block is installed on the inner arc surface of the pressure plate; the clamp is in line contact with the inner arc groove, and the inner arc surface of the pressure plate is in line contact with the outer arc surface of the arc-shaped pressure plate; the pressure plate and the positioning plate cooperate to press the workpiece.

2. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The bottom plate is fixed with support II, positioning plate and support I in sequence from front to back; the front end of the pressing plate is rotatably connected with the fixed support II, and the rear end is connected with support I.

3. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The matching surfaces of the arc-shaped pressing block and the pressing plate are arc-shaped structures.

4. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The clamp is mounted on the arc-shaped pressure block by means of a cylindrical pin.

5. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The outer shape of the clamp is a curved surface structure, which matches the inner arc groove.

6. The adaptive clamping device for multiple workpieces according to claim 5, characterized in that: The arc outer diameter of the clamp is smaller than the arc radius of the inner arc groove.

7. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The inner arc size of the pressing plate is larger than the outer arc size of the arc-shaped pressing plate.

8. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: The arc-shaped pressing block is installed on the pressing plate through a cylindrical pin.

9. The adaptive clamping device for multiple workpieces according to claim 1, characterized in that: A positioning pressing block is installed in the positioning hole at the bottom of the clamp.

10. The adaptive clamping device for multiple workpieces according to claim 2, characterized in that: The front end of the pressure plate is rotatably connected to the support II through a hinge shaft, and the rear end of the pressure plate is fastened to the support I through a bolt equipped with a spring.

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