Extrusion molding method for curved generatrix hole

A bus hole and curve technology, which is applied in the field of processing curve bus holes, can solve the problems of high processing cost, low production efficiency, affecting excellent characteristics, etc., and achieve the effect of saving processing cost, low forming force and simple mold.
CN1698991AInactive Publication Date: 2005-11-23HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2005-11-23
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

This invention relates to a method for processing curve generatrix hole, which belongs to metal non-cutting technology field. It uses opening koldflo technique, and comprises the following steps: a) designing the external block shape according to the shape of bore parts and consulting the relationship between key parameter, wherein the height of raw block H0=h+3-7mm, and the outline shape is similar to the mirror phase line of the generatrix in the bore; processing the block; b) designing handling mold, making D0-DM= (0.14-0.18)DM, wherein the DM is diameter of cutting edge, D0 is the largest diameter of block; c) coating lubricating agent on the surface of block and mold; d) extrusion forming; e) fine finishing to reach to the required size and precision.
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Description

technical field

[0001] The invention relates to a method for processing curved busbar holes, and belongs to the technical field of non-cutting processing of metal profiles. Background technique

[0002] In production practice, we often encounter the processing problem of part curve generatrix hole. The most typical and widely used representative part in the curved busbar hole is the Laval nozzle (nozzle, nozzle). The Laval nozzle is a contraction-expansion nozzle through which a gas with a certain pressure and a lower velocity can generate a supersonic flow. It is generally composed of three parts: contraction section, throat opening, and expansion section, and has the unique characteristic of obtaining supersonic airflow. It can be seen from aerodynamics that to generate supersonic flow, the throat needs to adopt a variable-section pipe, and the gas is first accelerated to the speed of sound in the contraction section, and then accelerated to supersonic flow in the expans...

Claims

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