Method for preparing pipe bending part by adopting flexible extrusion forming
A technology for extrusion molding and bending parts, which is applied in the field of flexible extrusion molding to prepare pipe bending parts, which can solve the problems of wrinkled cross section, thinning of the outer side wall, thickening of the inner side wall, etc. Thick and wrinkle-free, the effect of reasonable device structure
Inactive Publication Date: 2010-04-14
TIANJIN UNIVERSITY OF TECHNOLOGY
View PDF0 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
There are defects such as thinning and cracking of the outer wall, thickening, wrinkling and cross-sectional distortion of the inner wall in the parts produced by the traditional pipe bending method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0016] A method for preparing pipe bending parts by flexible extrusion molding. A metal billet is extruded and flexibly formed by a flexible extrusion molding device. The flexible extrusion molding device includes a mold forming part, a mold fixing part and a pressurizing part; the mold forming part includes Die 1, punch A 2, punch B 3 and mandrel 4, the discharge end of the die 1 has a taper; the fixed part of the mold includes a lower template 5, a fixed ring 6 and an upper template 7, and the fixed ring 6 is located at the bottom The template 5 and the upper template 7 are fixed with the upper template 6 by pins 8 and screws 9, the center of the lower template 5 is provided with a discharge port 10, the mold forming part is arranged in the fixed ring 6, and the upper end of the mandrel 4 passes through the beam 11 Fixed in the groove of the upper template 7, the lower end of the mandrel 4 is located at the tapered exit of the die 1; the pressurizing part includes a positioni...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for preparing a pipe bending part by adopting flexible extrusion forming, which is characterized in that a metal blank is extruded to flexibly form by a flexible extrusion forming device, wherein the flexible extrusion forming device comprises a mould forming part, a mould fixing part and a pressurizing part; the mould forming part comprises a female mould, male moulds and a mandril, wherein the discharge end of the female mould has a taper, and the male moulds are of a split structure; the mould fixing part comprises a lower template, a fixing ring and an upper template, and the center of the lower template is provided with a discharge hole; and the pressurizing part comprises a locating plate, four fixed links, two groups of hydraulic cylinders and two pistons, wherein the two pistons respectively apply pressure to the two male moulds and have differential pressure. The invention has the advantages that: in the extrusion forming device for the pipe bending part, the male moulds of the mould forming part are of a split structure, the pipe bending part is extruded to form by controlling the differential pressure, the device has reasonable structure and simple technology, and the pipe bending part has even wall thickness, no crease, no cross section deformation and reliable quality, thereby having wide application prospect.
Description
(1) Technical field [0001] The invention relates to the preparation technology of pipe bending parts, in particular to a method for preparing pipe bending parts by flexible extrusion molding. (2) Background technology [0002] As the application fields of pipe bending parts become more and more extensive, pipe bending parts are widely used in aerospace, automobile, shipbuilding and other industries, and the requirements for pipe bending quality and forming process are getting higher and higher. There are defects such as thinning and cracking of the outer wall, thickening, wrinkling and cross-sectional distortion of the inner wall in the parts produced by the traditional pipe bending method. (3) Contents of the invention [0003] The object of the present invention is to solve the above existing problems and provide a method for preparing pipe bending parts by flexible extrusion molding with simple process, reliable quality, uniform wall thickness, no wrinkle, and no distor...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/12
Inventor 宋继顺崔宏祥杜德恒尹康
Owner TIANJIN UNIVERSITY OF TECHNOLOGY