Extrusion needle point and perforating needle

Abstract

The invention discloses an extrusion needle point and a perforating needle. The extrusion needle point comprises a fixing section fixed to the extrusion needle, a work section and a conical section. The work section is used for extruding a seamless pipe, and the size of the circumscribed circle of the work section is larger than that of the circumscribed circle of the fixing section. The conical section is used for connecting the work section with the fixing section. During use, the extrusion needle point is fixed to the extrusion needle through the fixing section, the work section and the fixing section are connected through the conical section, the circumscribed circle of the work section is larger than that of the fixed section, in other words, inverted conical connection is achieved, and therefore the seamless pipe larger than the type of the extrusion needle in size can be machined. The type of the extrusion needle does not need to be replaced, and therefore the length of the seamless pipe cannot be affected. The extrusion needle point can produce the seamless pipe with the inner hole size larger than the specification of the extrusion needle under the premise that the fixed-size length is achieved, and the problems in the prior art are solved.

Description

technical field [0001] The invention relates to the field of extruding parts, in particular to an extruding needle point and a perforating needle. Background technique [0002] In the field of extrusion, perforating needles are widely used as an important part of the process. In operation, in order to save metal materials and simplify the replacement procedure of parts, the perforating needle is usually divided into two parts, that is, the extrusion needle and the needle point. In actual production, only the needle point needs to be replaced to realize the extrusion of products of different specifications. . Therefore, when making seamless pipes, the structure of the needle point directly affects the size and quality of the inner surface of the seamless pipe. [0003] For the production of different products, there are no more than five specifications of extruding needles that manufacturers have in stock, and under normal circumstances, the size of the circumscribed circle...

AI Technical Summary

Problems solved by technology

When the extrusion cross-sectional area is large and the inner hole size is slightly larger than the working size of an extrusion needle of a certain specification, if the extrusion needle of a larger specification is used, the extrusion pressure will be shortened under the premise of the same amount of raw materials. The length of the seamless pipe; and when replacing the extrusion needle, it is necessary to replace the extrusion barrel with matching specifications. This process is complicated to operate and reduces production efficiency

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