Pneumatic clamp for support type workpiece

Abstract

The utility model provides a pneumatic clamp for a support type workpiece. The pneumatic clamp is high in clamping precision and machining quality. The clamping device comprises a bottom plate and is characterized in that the bottom plate is provided with a vertical clamping mechanism and an H-shaped support, vertical plates on the two sides of the H-shaped support are provided with horizontal clamping mechanisms, a middle bridge plate of the H-shaped support is provided with a positioning plate, the positioning plate is provided with a positioning pin, and the positioning pin is matched with a hollow part of a workpiece in shape; the horizontal clamping mechanism comprises a limiting block fixedly installed on a vertical plate on one side of the H-shaped support and a thin air cylinder installed on a vertical plate on the other side of the H-shaped support, a piston rod of the air cylinder is fixedly connected with a push block, and the ends, close to the positioning pin, of the limiting block and the push block are pressing ends. The limiting block and the pressing end of the pushing block clamp a workpiece in the horizontal direction.

Description

Technical Field

[0001] The invention relates to the technical field of structure for positioning and clamping workpieces in a vertical machining center, in particular to a pneumatic clamp for a bracket-type workpiece. Background Art

[0002] This type of bracket workpiece is used in engineering equipment and has high precision requirements during processing. Therefore, the workpiece needs to be clamped and fixed with a fixture before processing. The original fixture is a manual fixture, and the manual clamping accuracy is not high. It cannot guarantee that the same part of the workpiece is clamped every time processing, resulting in uneven force on the workpiece, easy deformation during processing, inaccurate dimensional processing results, and low processing quality. Summary of the invention

[0003] Aiming at the disadvantage that the existing clamping tools for clamping bracket-type workpieces have low clamping precision, resulting in low processing quality, the utility model provides a pneumatic clamp for bracket-type workpieces, which has high clamping precision and high processing quality.

[0004] A pneumatic clamp for a bracket-type workpiece, which includes a base plate, characterized in that: the base plate is equipped with a vertical clamping mechanism and an H-shaped bracket, the two side vertical plates of the H-shaped bracket are equipped with a horizontal clamping mechanism, the middle bridge plate of the H-shaped bracket is equipped with a positioning plate, the positioning plate is equipped with a positioning pin, and the positioning pin matches the shape of the hollow part of the workpiece; the horizontal clamping mechanism includes a limit block fixedly installed on the vertical plate on one side of the H-shaped bracket and a thin cylinder installed on the vertical plate on the other side of the H-shaped bracket, the piston rod of the cylinder is fixedly connected to a push block, the limit block and the end of the push block close to the positioning pin are clamping ends, and the limit block and the clamping ends of the push block constitute a horizontal clamping of the workpiece.

[0005] It is further characterized by:

[0006] The vertical clamping mechanism comprises a lever cylinder, a piston rod of the lever cylinder is rotatably connected to one end of a lever pressure plate, the lever pressure plate is rotatably mounted on the upper surface of the lever cylinder through a hinge frame, and the other end of the lever pressure plate and the positioning plate constitute a clamping mechanism for the workpiece in a vertical direction;

[0007] There are two vertical clamping mechanisms, which are respectively located at the front and rear sides of the H-shaped bracket, and the two vertical clamping mechanisms are symmetrical with the positioning pin as the center;

[0008] The shape of the upper surface of the positioning plate is consistent with the shape of the lower surface of the workpiece;

[0009] The clamping ends of the limiting block and the pushing block respectively match the shapes of two sides of the workpiece.

[0010] In the above structure of the utility model, by setting the positioning plate and the positioning pin, the hollow part in the middle of the workpiece is mounted on the positioning pin, so that the shape of the bottom surface of the workpiece fits the shape of the top surface of the positioning plate, that is, the precise positioning of the workpiece is achieved, the clamping accuracy is guaranteed, and the processing quality is improved. The horizontal clamping mechanism and the vertical clamping mechanism realize clamping of the workpiece from two directions, improve the clamping stability, and thus improve the processing quality. The clamping ends of the limit block and the push block match the shapes of the two sides of the workpiece, further ensuring the clamping accuracy and further improving the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the axonometric view of the utility model;

[0012] Figure 2 It is a schematic diagram of the utility model from a top view;

[0013] Figure 3 A schematic diagram of the main view of the utility model;

[0014] Figure 4 Schematic diagram of the workpiece structure. DETAILED DESCRIPTION

[0015] See Figures 1 to 4 , a pneumatic clamp for a bracket-type workpiece, which includes a base plate 1, the base plate 1 is equipped with a vertical clamping mechanism and an H-shaped bracket 2, the two side vertical plates 22 of the H-shaped bracket 2 are equipped with a horizontal clamping mechanism, the middle bridge plate 21 of the H-shaped bracket 2 is equipped with a positioning plate 3, the upper surface shape of the positioning plate 3 is consistent with the lower surface shape of the workpiece 10; the positioning plate 3 is equipped with a positioning pin 4, and the positioning pin 4 matches the shape of the hollow part of the workpiece 10; the horizontal clamping mechanism includes a limit block 5 fixedly installed on the vertical plate 22 on one side of the H-shaped bracket 2 and a thin cylinder 6 installed on the vertical plate 22 on the other side of the H-shaped bracket 2, the piston rod of the thin cylinder 6 is fixedly connected to the push block 9, the clamping ends of the limit block 5 and the push block 9 respectively match the shapes of the two sides of the workpiece 10, the end of the limit block 5 and the push block 9 close to the positioning pin 4 is the clamping end, and the clamping ends of the limit block 5 and the push block 9 constitute the horizontal clamping of the workpiece 10.

[0016] The vertical clamping mechanism includes a lever cylinder 8, a piston rod of which is rotatably connected to one end of a lever pressure plate 9, and the lever pressure plate 9 is rotatably installed on the upper surface of the lever cylinder 8 through a hinge frame. The other end of the lever pressure plate 9 and the positioning plate 3 constitute a vertical clamping of the workpiece 10; there are two vertical clamping mechanisms, which are respectively located on the front and rear sides of the H-shaped bracket 2, and the two vertical clamping mechanisms are symmetrical with the positioning pin 4 as the center.

[0017] The working process of the utility model is as follows: the hollow part in the middle of the workpiece 10 is mounted on the positioning pin 4, so that the bottom surface of the workpiece 10 fits the top surface of the positioning plate 3, and one side is close to the limit block 5, and then the switch is turned on, the piston rod of the thin cylinder 6 extends out, pushing the push block 9 until it presses the other side of the workpiece 10, completing the horizontal clamping of the workpiece 10. The piston rod of the lever pressing plate 9 extends upward, driving the other end of the lever pressing plate 9 to press down until it presses the upper surface of the workpiece 10, completing the vertical clamping of the workpiece 10, and then the workpiece 10 can be processed. After the processing is completed, turn off the switch, the piston rods of the thin cylinder 6 and the lever cylinder 8 retract to their original positions, driving the push block 9 and the lever pressing plate 9 to separate from the workpiece 10, and then the processed workpiece 10 can be taken out.

Claims

1. A pneumatic clamp for a bracket-type workpiece, comprising a base plate, characterized in that: The base plate is equipped with a vertical clamping mechanism and an H-shaped bracket, the two side vertical plates of the H-shaped bracket are equipped with a horizontal clamping mechanism, the middle bridge plate of the H-shaped bracket is equipped with a positioning plate, the positioning plate is equipped with a positioning pin, and the positioning pin matches the shape of the hollow part of the workpiece; the horizontal clamping mechanism includes a limit block fixedly installed on the vertical plate on one side of the H-shaped bracket and a thin cylinder installed on the vertical plate on the other side of the H-shaped bracket, the piston rod of the cylinder is fixedly connected to the push block, the limit block and the end of the push block close to the positioning pin are clamping ends, and the limit block and the clamping ends of the push block constitute a horizontal clamping of the workpiece.

2. A pneumatic clamp for a bracket-type workpiece according to claim 1, characterized in that: The vertical clamping mechanism includes a lever cylinder, a piston rod of the lever cylinder is rotatably connected to one end of a lever pressure plate, and the lever pressure plate is rotatably mounted on the upper surface of the lever cylinder through a hinge frame. The other end of the lever pressure plate and the positioning plate constitute a clamping of the workpiece in the vertical direction.

3. A pneumatic clamp for a bracket-type workpiece according to claim 2, characterized in that: There are two vertical clamping mechanisms, which are respectively located at the front and rear sides of the H-shaped bracket, and the two vertical clamping mechanisms are symmetrical with the positioning pin as the center.

4. A pneumatic clamp for a bracket-type workpiece according to claim 1, characterized in that: The shape of the upper surface of the positioning plate is consistent with the shape of the lower surface of the workpiece.

5. The pneumatic clamp for a bracket-type workpiece according to claim 1, characterized in that: The clamping ends of the limiting block and the pushing block respectively match the shapes of two sides of the workpiece.

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