Back-pull self-centering hydraulic clamp capable of inspecting airtightness

Abstract

The invention discloses a back-pull self-centering hydraulic clamp capable of inspecting airtightness. The back-pull self-centering hydraulic clamp comprises a pull rod, a Morse cone, a nut, an expansion body, a support body, connecting bolts, a piston disc, a piston, an expansion bushing, a positioning block, etc., wherein an oil path system is arranged in the support body and the expansion body;an airtight hole is formed in the end, of the pull rod, near the expansion body; an airtight channel is formed in the position, on the Morse cone, corresponding to the position of the airtight hole,runs through the expansion body, the support body and the expansion bushing in sequence, and extends to a surface in contact with a workpiece; and the airtight channel is staggered with the oil path system. The self-centering of the hydraulic clamp can be achieved; the centering accuracy of the Morse cone is copied to the clamp to better ensure the high and stable positioning accuracy of the clamp; the airtightness of the surface, of the clamp, contacting and positioning the workpiece, can be inspected; and whether the workpiece is mounted wrongly or not can be determined to a certain extent to achieve an error-proofing function of the clamp.

Description

technical field [0001] The invention relates to the technical field of hydraulic clamps, in particular to a back-pull self-centering hydraulic clamp with airtight detection. Background technique [0002] At present, the body part of many hydraulic clamps is connected to the end face of the Morse cone, and the Morse cone is inserted into the main shaft to install the clamp on the main shaft. The main method is to expand the inner hole to fix the end face, use the pull rod to push the piston to move, so that the hydraulic oil inside the fixture is compressed into the expansion sleeve, so as to tighten the workpiece, and the end face of the part is positioned by the positioning block of the fixture. Push-forward hydraulic clamps are widely used in the field of machining. [0003] The existing hydraulic clamps mainly have the following problems: [0004] (1) The existing hydraulic fixture does not have the airtight detection function of the end surface (positioning surface). W...

AI Technical Summary

Problems solved by technology

[0004] (1) The existing hydraulic fixture does not have the airtight detection function of the end surface (positioning surface). When installing the workpiece, when there are residual iron filings or impurities on the positioning surface, it is easy to cause the positioning accuracy to be lost, resulting in scrapped parts;

[0005] (2) The forward-push hydraulic fixture positioned by the Morse cone is easy to push the fixture out of the main body of the machine tool, resulting in loss of fixture precision and even safety accidents; if the Morse cone is bolted to the machine tool box, it is easy to damage Morse taper positioning accuracy, resulting in loss of fixture accuracy

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