CN86205448U

CN86205448U - Elbow forming derice of little curvature u shape tube

Info

Publication number: CN86205448U
Application number: CN 86205448
Authority: CN
Inventors: 程国勋; 陈久阳
Original assignee: ZHONGHUA SHIPYARD
Current assignee: ZHONGHUA SHIPYARD
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1987-03-04

Abstract

The utility model discloses an elbow forming device of little curvature U shape tube, which belongs to the elbow mechanical device in cold working. The utility model comprises a forming mould < 1 >, an additional pressing force < P >, and a straight steel tube < 2 >, after the preliminary treatment, needed to be processed into the elbow of the little curvature U shape tube. The utility model is characterized in that the straight steel tube< 2 > is inserted into the entry end of the forming mould < 1 >; under the action of the additional pressing force < P >, the straight steel tube < 2 > is bent into a desired U shape tube elbow; the scope of the little curvature is 1.1<R/D<2 (R: bend radius; D: the outer diameter of the straight steel tube); the angle scope of the elbow forming is 90 DEG < theta < 180 DEG.

Description

Elbow forming derice of little curvature U shape tube

The utility model belongs to cold working pipe bending machine device.

Small curve is meant 1.1≤(R)/(D)≤2 herein, the sub-bending radius of R vial wherein, the sub-external diameter of D vial.

In prior art, generally be utilize a secondary mould, when being squeezed into mold cavity, pipe to be processed carries out bending forming.What have also need add the plug that can withdraw from pipe, in case pipe deformation.The pipe bend that so shapes, its curvature (R)/(D) 〉=2, and the shaping angle θ after the general bending=90 °, must obtain 180 ° U-shaped pipe bend in 2 sections welding rears.

The utility model has been done improvement to prior art, purpose is by a kind of shaping dies is provided, be aided with the suitable preliminary treatment to crooked pipe blank, bending out curvature with the punch process mode is 1.1≤(R)/(D)≤2, and the bending forming angle is 180 ° U-shaped pipe bend.

Accompanying drawing is a structure principle chart of the present utility model.

Principle of compositionality of the present utility model is: a curvature U shape pipe bend building mortion, comprise the shaping dies (1) that a pair is split, and need be processed into the straight steel pipe (2) of curvature U shape pipe bend and add stamping press (P). Add man-hour, straight steel pipe (2) is done to insert shaping dies (1) porch after the preliminary treatment, under the effect that adds stamping press (P), straight steel pipe (2) namely is bent into required curvature U shape pipe bend. Have Simply, conveniently, efficient height, distortion all characteristics such as little, successful.

Accompanying drawing can be simultaneously as the structure principle chart of a most preferred embodiment of the present utility model.

In the accompanying drawing illustrated embodiment, the shaping dies that a pair is split (1), its die cavity are the shape of the small curve U-shaped pipe bend that needs processing, and mold cavity surface is processed into predetermined fineness; For reducing the frictional force with mold cavity surface, the straight steel pipe (2) that need can be processed into small curve U-shaped pipe bend is processed into the β angle in advance, and periphery is coated with lubricant.

As shown in the figure, straight steel pipe to be processed (2) is inserted the porch of shaping dies (1), under the effect of the stamping press (P) of stamping machine, straight steel pipe (2) is bent into the U-shaped pipe bend in the die cavity of mould (1).Divided mould (1) is taken out U type pipe bend, just obtains required small curve U-shaped pipe bend after the cutting on demand.

In the present embodiment, according to after mould (1) die cavity need being processed into required shape, then U-shaped pipe bend shaping angle can be within 90 °～180 ° any range.

In the present embodiment, when having an end need straightway not arranged as if the U-shaped pipe bend, then the α angle that has as shown in the figure can be processed in the die cavity exit of mould (1), to reduce the resistance of stamping press (P).

As a kind of conversion of present embodiment, steel pipe (2) the resistant to elevated temperatures two vitrification molybdenum powder materials that with lubricator can use.

Claims

1, a kind of small curve (11≤(R)/(D)≤2) U-shaped pipe bend building mortion, it comprises shaping dies＜1 that a pair is split 〉, need be processed into straight steel pipe＜2 of elbow〉and external force＜P, it is characterized in that, the shaping dies of splitting＜1〉die cavity be the small curve U-shaped pipe bend shape that needs processing, straight steel pipe＜2〉can be processed into the β angle in advance, its periphery also is coated with lubricant external force＜P〉be a stamping press.

2,, it is characterized in that the die cavity of shaping dies (1) can be processed into the shape of the at any angle small curve U-shaped pipe bend of elbow shaping angular range between 90 ° to 180 ° according to the described bend forming device of claim 1.

3, according to claim 1 or 2 described elbow building mortions, it is characterized in that the die cavity of shaping dies (1), when the U-shaped pipe bend had an end need straightway not arranged, the shape with α angle can be processed in its exit.

4,, it is characterized in that lubricant that straight steel pipe (2) periphery is coated with can be with two vitrification molybdenum powder materials according to the described elbow building mortion of claim 1.