Large-stroke clamping mechanism of heavy-duty cutting fixture for machining industry

Abstract

The invention discloses a large-stroke clamping mechanism of a heavy-duty cutting fixture for the machining industry. The large-stroke clamping mechanism comprises a push bar and a pressure plate. The end of the push bar is provided with an opening. The pressure plate inside the opening is connected through a pin. The push bar is provided with an elongated hole for the insertion of the pin. A pad is fixedly connected to the push bar and disposed between the push bar and the pressure plate. The pressure plate is in cylindrical face contact with the pad. A dowel is fixedly connected to one side of the pad and inserted into a dowel hole of the pressure plate. The pressure plate is provided with a first press nail and a second press nail. According to the large-stroke clamping mechanism, when a work piece is tightly pressed, the two press nails clamp towards the work piece at the same time, a cylindrical face of the pressure plate is in linear contact with that of the pad so as to transfer clamping force, the dowel allows the pressure plate to rotate at a small angle to ensure reliable contact between the press nails and clamping points, and the pin bears no main clamping force after clamping. The large-stroke clamping mechanism is simple in structure and small in structural size, rarely causes interference, has large clamping force, is stable and reliable in clamping, and is more suitable for large strokes.

Description

technical field [0001] The invention relates to a clamping mechanism, in particular to a large-stroke clamping mechanism for heavy cutting fixtures in the machining industry. Background technique [0002] The clamping mechanism of the pressure plate is one of the commonly used mechanical structures in the machining industry. Its function is to clamp the workpiece on the positioning datum to ensure reliable positioning of the workpiece and to ensure that the position of the workpiece is always fixed during the machining process. The existing pressing plate clamping mechanism is to directly hinge the pressing plate on the push rod through the pin shaft, fix the pin on the pressing plate, and make guide holes for the pin on the fixture fixing parts such as the fixture upper cover. When the stroke of the pressing plate is large, the length of the pin shaft increases accordingly, and the self-weight of the pin shaft will cause the pressing plate to be unbalanced and affect the cl...

AI Technical Summary

Problems solved by technology

When the stroke of the pressure plate is large, the length of the pin shaft increases accordingly, and the self-weight of the pin shaft will cause the pressure plate to be unbalanced and affect the clamping effect

When the cutting force is large, the thickness of the pressure plate becomes thicker, the diameter of the pin shaft increases, the diameter of the push rod increases, and the size of the entire structure increases, which will easily cause interference of various mechanisms of the fixture.

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