Rotating extrusion processing method for arc cutting edge with width less than R0.2

Abstract

The invention discloses a rotating extrusion processing method for an arc cutting edge with width less than R0.2. The method adopts same high-speed tool steel as a material of a special cutter, an extruded rod made of the high-speed tool steel is made into an arc cutting edge without a front corner or a rear corner, the arc cutting edge is arranged on a tailstock of mechanical equipment, and together with a steel structure part which is on a main shaft of the mechanical equipment installed on an automotive machine tool is subjected to rotating extrusion processing, so as to form the cutting edge of the structure part, and finally the uniform dimension of the processed cutting edge can be ensured. The processing method of the invention is suitable for processing of the arc cutting edge which is made of stainless steel with R0.2mm cutting edge width, the device is a lathe or a numerically controlled lathe, and in the machining process, the wearing amount of the extruded rod made of the high-speed tool steel is small enough to be ignored, so that the extruded rod has a long service life. The processing method can effectively improve processing cost of the product structure part and efficiency, and has the beneficial effects of shortening production cycle and improving product quality of the structure part.

Description

technical field [0001] The invention relates to the technical field of cold extrusion processing, in particular to a spinning extrusion processing method for a steel material structure with an arc cutting edge smaller than R0.2. Background technique [0002] The cutting edge is an important component of the sealing pair of valves and steel structural parts. Its shape structure, shape and position tolerance, and surface roughness are important indicators that affect the sealing performance of the valve. However, the existing non-standard cutting edge has the phenomenon that the cutting edge indentation does not overlap after repeated work, which leads to the widening of the contact surface and finally affects the sealing performance of the entire product. The arc cutting edge processed by the invention can improve the coincidence of the indentation of the valve core after the repeated operation of the valve, and greatly improve the reliability of the valve. [0003] It is di...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the processing process of the prior art, the cutting edge of the tool is cracked, and the wear is fast, the tool life is short, the size is unstable, and the qualified rate is low.

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