Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies

Abstract

The invention relates to a shaping device for preparing a bent tube by virtue of differential-velocity extrusion of dual male dies. The extrusion shaping device comprises a mould molding part, a mould fixing part and a mould guide part; the mould molding part comprises a female die, male dies, a core shaft and an extruding block; the mould fixing part comprises a pedestal fixing board, a support base, a sliding board and a female die fixing board; and the mould guide part comprises a guide column, a guide sleeve, a top board and a pedestal fixing board. The shaping device has the advantage that the mould uses horizontal type extruding, thus the length range of the extruded bent tube is enlarged; the female die and female die fixing board of the mould shaping part are both in a block type,which is convenient for taking out of the workpiece after the extruding and extruding the blank again; the core shaft fixing board is guided through the guide rod and a dovetail groove and is ejectedout through screw by hands; the center lines of the female die, the male dies and the core shaft are on the same straight line so that the device is convenient to assemble and easy to adjust; the extruding speeds of the male dies A, B are changed to produce an extruding speed differentia value between the male dies A, B, wherein the differential value can be utilized to prepare the bent tube; thedevice is reasonable in structure and simple in technology; the thickness of the wall of the bent tube in uniform in wall thickness and smooth and has no cross section deformation; and the device is reliable in quality and wide in application prospect.

Description

technical field [0001] The invention relates to the preparation technology of medium and thin-walled pipe bending parts, in particular to a device that adopts double-convex dies to extrude pipes that are arbitrarily curved on a plane. Background technique [0002] With the development of forming equipment and manufacturing technology, pipe bending parts with complex shapes appear more and more frequently in industrial fields, especially in high-tech industrial fields, such as aircraft, ships, automobiles, gas pipelines, and some stand. Because the use of curved pipe fittings instead of the original wire or plastic pipes can reduce weight and improve durability. With the widespread application of pipe bending parts, people have higher and higher requirements on the bending quality and forming process of pipe materials. Most of the curved pipe fittings produced by traditional methods such as push bending and rolling bending have some defects, such as the reduction of the oute...

AI Technical Summary

Problems solved by technology

With the widespread application of pipe bending parts, people have higher and higher requirements on the bending quality and forming process of pipe materials. Most of the curved pipe fittings produced by traditional methods such as push bending and rolling bending have some defects, such as the reduction of the outer wall. Defects such as thinness and cracking, thickening of the inner wall, wrinkling, and cross-sectional distortion, and the bending angle and direction of the pipe fittings are limited, and arbitrary bending cannot be achieved

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