Manufacturing method of variable cross-section pipe fitting

A manufacturing method and variable cross-section technology, applied in the field of variable cross-section pipe fittings, can solve the problems of surface cracks, troubles, shortened service life, etc., and achieve the effect of no change in length

Inactive Publication Date: 2013-06-12
张家港海陆重型锻压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The variable cross-section pipe fittings processed by the existing manufacturing method will have internal collapse, overall distortion, and cracks on the surface. Although they can continue to be used, their service life will be significantly shortened, and the variable cross-section pipe fittings are welded to other parts, so if It will be troublesome to replace

Method used

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  • Manufacturing method of variable cross-section pipe fitting
  • Manufacturing method of variable cross-section pipe fitting

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Embodiment Construction

[0010] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0011] The manufacturing method of variable cross-section pipe fittings according to the present invention, plate blanking→heating→die extrusion→welding extruded slabs into variable cross-section pipe fittings→heat treatment→checking shape and trimming and grinding→rough machining→flaw detection→adjustment Quality→finishing→inspection→delivery, where the blanking of the sheet is to cut the sheet into two slabs, and the upper mold and the lower mold are used in the die extrusion step, after the slab is placed in the lower mold, the upper mold The slab exerts a downward force so that the slab is squeezed between the upper die and the lower die until the half wall of the variable section pipe is formed.

[0012] like figure 1 As shown, the slab is heated in a furnace below 150°C, heated to 700±10°C at a heating rate of ≤100°C / hour and kept for 1...

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Abstract

The invention discloses a manufacturing method of a variable cross-section pipe fitting, which comprises the steps of blanking a plate sheet, heating, performing mould extrusion, allowing extruded plate blanks to be welded into the variable cross-section pipe fitting, and performing heat treatment, appearance inspection, finishing, grinding, rough processing, flaw detection, hardening and tempering, finish turning, inspection and delivery, wherein in the step of blanking the plate sheet, the plate sheet is cut into two plate blanks, and in the step of the mould extrusion, an upper mould and a lower mould are adopted, and after the plate blanks are placed in the lower mould, the upper mould applies a downward force on the plate blanks, so that the plate blanks are extruded between the upper mould and the lower mould till half pipe walls of the variable cross-section pipe fitting are formed. The manufacturing method has the advantages that with the adoption of the manufacturing method, the interior of the produced variable cross-section pipe fitting does not collapse; the length of the variable cross-section pipe fitting is not changed; the variable cross-section pipe fitting is not distorted; and the surface of the variable cross-section pipe fitting is smooth and clean without folds, cracks or other forging defects.

Description

technical field [0001] The invention relates to a method for manufacturing variable-section pipe fittings. Background technique [0002] Variable cross-section pipe fittings are widely used in the field of containers. Its structure includes a pipe body. One end face of the pipe body is circular, and the end face of the other end is oval, and the transition between the circular end face and the oval end face is smooth. Most of the variable cross-section pipe fittings are used as oblique intubation tubes, that is, in actual use, a piece of the elliptical end face of the variable cross-section pipe fittings is obliquely cut off, and then the part of the variable cross-section pipe fittings that has been cut off is welded to the outer wall of the cylindrical cylinder , and ensure that the central axis of the variable-section pipe is inclined to the central axis of the cylindrical barrel. Due to the high technological requirements of this type of variable cross-section pipe fitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21C37/16C21D8/10
Inventor 方敏
Owner 张家港海陆重型锻压有限公司
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