High precision tool bit connecting structure

Abstract

The invention discloses a high precision tool bit connecting structure, relates to the field of machining tools, and provides the tool bit connecting structure capable of effectively improving the connecting accuracy and the connecting rigidity of a tool bit and a tool handle. The high precision tool bit connecting structure comprises the tool bit and the tool handle, a connecting column is arranged on the tool bit, a connecting hole is formed in the tool handle, and the tool bit is connected with the tool handle through the connecting column and the connecting hole; the connecting column comprises a threaded column and a cone-shaped column, the threaded column and the cone-shaped column are coaxially arranged, the connecting hole comprises a threaded hole and a cone-shaped hole, and the threaded hole and the cone-shaped hole are coaxially arranged; the threaded column is connected with the threaded hole, the cone-shaped column is tightly attached to the cone-shaped hole, and the end surface of the tool bit is tightly attached to the end surface of the tool handle; the surface, facing the cone-shaped column, of threads of the threaded column is an outer thread centering surface, anangle a formed by the outer thread centering surface and a threaded column axis is equal to 5-15 degrees, and the accuracy of grinding machining of the outer thread centering surface is guaranteed; the surface, close to the tool bit, of the threads of the threaded hole is an inner thread centering surface, and the accuracy of grinding machining of the inner thread centering surface is guaranteed;and the outer thread centering surface is attached to the inner thread centering surface.

Description

technical field [0001] The invention relates to the field of machining cutters, in particular to a high-precision cutter head connection structure. Background technique [0002] A connection structure between a cutter head and a handle such as figure 1 As shown, the cutter head is provided with a connecting post, and the handle is provided with a connecting hole, the connecting post includes a threaded section and a polished rod section, and the connecting hole includes a threaded hole and a smooth hole. The connecting column is inserted into the connecting hole, the threaded section is connected with the threaded hole, the polished rod section is matched with the light hole in a small gap, and the end surface of the cutter head is closely attached to the end surface of the tool handle. The threaded section is connected to the threaded hole, and because there is a gap between the common internal and external threads, this connection cannot prevent the cutter head from shaki...

AI Technical Summary

Problems solved by technology

The small gap between the polished rod section and the light hole ensures that the cutter head and the handle are concentric and prevents the cutter head from shaking. There is a gap, which cannot achieve the effect of precise centering

In high-precision machining, the small concentricity error of the cutter head will also affect the machining accuracy and tool life

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