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Large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method

A technology of mold design and forming process, applied in the direction of metal extrusion die, metal extrusion, manufacturing tools, etc., can solve the problems of increasing energy consumption and production cost, not being a large multi-nozzle pipeline, and difficult to guarantee quality

Inactive Publication Date: 2014-01-29
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method not only increases energy consumption and production cost, but also the performance of the product after forming is unstable and the quality is difficult to guarantee
All of the above methods have certain deficiencies and are not an ideal technology for manufacturing large multi-nozzle pipelines

Method used

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  • Large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method
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  • Large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method

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Embodiment Construction

[0095] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments:

[0096] A large-scale multi-nozzle pipeline hot extrusion forming process formulation and die design method, taking the large-scale double-nozzle pipeline hot extrusion forming process formulation and die design method as an example, the details are as follows:

[0097] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "left", "right", "upper" and "lower" are based on the orientations or positional relationships shown in the drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as lim...

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Abstract

The invention discloses a large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method. Taking a double-nozzle pipe for example, the method comprises the following steps: determining the size of each part of an unmachined double-nozzle pipe after hot extrusion forming; determining the size of an initial pipe blank; determining the position of the center of a prefabricated hole and the size of the aperture; determining amount of compression in the axial direction of the pipe blank with the prefabricated hole, of which oxide skin is removed, required for finishing hot extrusion forming of a second nozzle; determining amount of compression in the axial direction of the pipe blank required for continuing to finish hot extrusion forming of a first nozzle; determining the dimensional parameter of a key part of the hot extrusion mold; selecting the structural form of the hot extrusion mold; determining the extrusion capacity parameter and selecting forming equipment; determining a technological flow of the double-nozzle pipe hot extrusion forming process. According to the method, a pipe inner hole and a nozzle inner hole can be directly formed, the structural strength at the nozzle is improved, the metal mechanic property and the structure property are improved, the manufacturing period is shortened, and the material utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of multi-nozzle pipeline manufacturing, and relates to a large-scale multi-nozzle pipeline hot extrusion forming process formulation and mold design method. Background technique [0002] Large multi-nozzle pipelines are important facility components in nuclear power, thermal power, petrochemical and other industrial fields. [0003] Currently, there are two methods for manufacturing large multi-nozzle pipes. One method is to use the combination of free forging and machining to remove material, that is, firstly, the solid blank is free forged to form a solid blank with a pipe profile with a solid boss, and then the solid blank is machined to obtain the inner hole of the pipe. and nozzle bores. This method has low production efficiency, low material utilization rate, complicated heating process, poor pipeline structure and high energy consumption. Another method is to heat the tube blank multiple times to draw the no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C23/08B21C25/02B21C25/04B21C27/00
Inventor 孙朝阳周庆军刘超黄杰杨竞张清东
Owner UNIV OF SCI & TECH BEIJING
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