Metal cutting machine tool automatic retracting device

Abstract

The invention relates to the technical field of metal cutting machine tools, in particular to an automatic tool retracting unit for a metal cutting machine tool. The automatic tool retracting unit is provided with a ram, a rotating shaft, a toolbar and a tool rest body, and is characterized in that one side of the ram is provided with a positioning seat, the upper end of the toolbar is fixedly connected with the positioning seat, the lower end of the toolbar is hinged with the tool rest body through the rotating shaft, the tool rest body consists of a tool fluctuation seat, a tool bit and a tension spring, the middle of the upper end of the tool fluctuation seat is provided with a positioning boss, one side of the tool fluctuation seat abuts against the toolbar, and the other side of the tool fluctuation seat abuts against the lower end of the toolbar through the tension spring in a tension spring positioning hole. By the adoption of the structure, the automatic tool retracting unit has the advantages of being reasonable in structure, convenient to operate, large in travel of the toolbar, wide in machining range, high in machining efficiency, low in labor intensity and the like.

Description

technical field [0001] The invention relates to the technical field of metal cutting machine tools, in particular to an automatic cutter retracting device for metal cutting machine tools. Background technique [0002] At present, there are usually two kinds of tool retraction devices used for planing workpieces on planers, one is manual retraction, and the other is mechanical automatic retraction device; manual retraction means that the tool moves along the ram along the The bed makes reciprocating linear motion. During the return stroke, since there is no automatic tool retracting device, the tool is lifted close to the inertia of the return motion and the corresponding continuous components. There is a possibility that the surface of the workpiece is easily scratched by the planer and the accuracy is reduced. , and the main blade of the planer wears quickly. In order to reduce the damage caused by the surface of the planer, the knife is usually raised and retracted manuall...

AI Technical Summary

Problems solved by technology

[0002] At present, there are usually two kinds of tool retraction devices used for planing workpieces on planers, one is manual retraction, and the other is mechanical automatic retraction device; manual retraction means that the tool moves along the ram along the The bed makes reciprocating linear motion. During the return stroke, since there is no automatic tool retracting device, the tool is lifted close to the inertia of the return motion and the corresponding continuous components. There is a possibility that the surface of the workpiece is easily scratched by the planer and the accuracy is reduced. , and the main blade of the planer wears quickly. In order to reduce the damage caused by the surface of the planer, the knife is usually raised and retracted manually, which virtually increases the labor intensity of the operator, and the processing quality cannot be guaranteed; the mechanical automatic retracting device It is composed of a ram, a tool holder body, a rocker arm, a ratchet mechanism, a rotating shaft and an electromagnetic driver. The electromagnetic driver is composed of an electromagnet winding, a power supply and a micro switch. The electromagnet core in the electromagnetic driver is fastened to the tool holder body. On the undulating seat of the tool, the convex edge on the crank wheel is a ring piece fastened to the periphery of the wheel rim. The central angle of the arc of the ring piece is 175°. When the crank wheel rotates, the ram, tool holder During the half cycle of the automatic feed movement, the micro switch installed on the wheel housing is disconnected, the electromagnet does not attract the armature, and the planer performs feed cutting on the surface of the cutting workpiece. , the protruding edge on it presses down the micro switch button, turns on the power supply and the electromagnet coil, and because the armature is attracted, the planer is lifted at a certain angle around the axis through the arm lever, and leaves the surface of the workpiece to be processed until the end of the return journey. After the convex edge at 175° angle turns over the micro switch, the electromagnet winding is disconnected from the power supply, and the planer resets by itself, which has the advantage of improving the machining accuracy and reducing the wear of the planer. Small range of workpieces to be processed

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