Pneumatic self-locking clamping fixture

Abstract

The invention relates to a pneumatic self-locking clamping fixture. The fixture comprises a clamping device, wherein the clamping device adopts a wedge clamping mechanism, the wedge clamping mechanism comprises a wedge column (10) and a roller (9), a piston rod mounting double-screw bolt is arranged at one end of the wedge column (10), and the roller (9) is arranged on an inclined working surface of the wedge column (10). Compared with the prior art, the fixture has the beneficial effects as follows: clamping self-locking is controlled by the aid of a double-acting air cylinder, convenient and quick mounting and dismounting are realized, automatic and synchronous clamping is realized by the aid of a double-pressing-plate clamping structure, and the fixture can clamp a to-be-machined part firmly and realize quick self-locking in an instant and can also release the to-be-machined part in an instant after machining is completed, so that the mounting and dismounting efficiency is substantially improved; two guiding columns are arranged to form a cross structure, and thus relatively small workpieces can be clamped to be machined; the fixture has an oblong appearance, and multiple machining stations can be arranged according to sizes of workpieces, accordingly, the multiple workpieces can be machined simultaneously, the machining cost is saved, and the economic benefit is substantially increased.

Description

technical field [0001] The invention relates to a machine tool fixture, in particular to a pneumatic self-locking clamping fixture. Background technique [0002] The Chinese utility model patent No. ZL201520485952.7 discloses a double-platen fixture, which includes a platen, a remote rod, a cylinder, a thrust rod, a clamp body, a supporting plate and a piston rod. The fixture is provided with two pressure plates, and the pressure plate is supported by two rockers of equal length, forming a parallelogram mechanism with the clamp body; two piston rods are installed at both ends of the cylinder, and the piston rod is connected to the pressure plate. The cylinder is connected with the clamp body through a thrust rod. When the piston rod of the cylinder moves up and down, the pressure plate will always be parallel to the horizontal base surface of the clamp body to complete the forward-tightening-loosen-backward action, which can be adjusted according to the workpiece. Shape, th...

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Problems solved by technology

However, on the one hand, this utility model does not have a self-locking structure, and it is easy to cause unstable or misaligned clamping positions during the processing of complex parts or parts with large cutting forces, which greatly affects the normal processing and processing quality of the processed parts, and is also easy to On the other hand, the utility model is not provided with a positioning mandrel and a diamond-shaped positioning pin on the positioning element, so the positioning accuracy of the processed parts cannot be guaranteed, and the above-mentioned technical defects also exist

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