CN203541265U

CN203541265U - Bending die of rectangular tubes

Info

Publication number: CN203541265U
Application number: CN201320571773.6U
Authority: CN
Inventors: 韩家海
Original assignee: TIANJIN HAISHENG YIMING TECHNOLOGY Co Ltd
Current assignee: TIANJIN HAISHENG YIMING TECHNOLOGY Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2014-04-16
Anticipated expiration: 2023-09-13

Abstract

The utility model relates to a bending die of rectangular tubes. The die comprises a bending die wheel and a front clamp die. The outer peripheral surface of the bending die wheel is provided with a circular groove having depth which is half of the height of a tube. The bending die is characterized by further comprising a rear clamp die and a bending mandrel; the rear clamp die is provided with a first groove; the side height of the first groove is half of the height of the tube; the bottom section of the first groove is in an arc shape having the middle farther away from the bending die wheel than the ends; the bending mandrel is provided with a rib which extends along the first groove; the cross section of the bending mandrel is in arc shape having the middle farther away from the bending die wheel than the ends; a bending mandrel link is connected to the tail of the bending mandrel. The bending die of rectangular tubes has the advantage that the application of the die in tube bending can prevent the arc outer walls of the tubes from indenting.

Description

Rectangular tube bend pipe mould

Technical field

This patent belongs to tube forming technical field, particularly relates to a kind of rectangular tube bend pipe mould.

Background technology

At present, for the tubing of thin-walled, for example cross section be 30mm long, 10 or the high rectangle of 15mm, thickness is 1mm or thinner tubing, if directly carry out for example bending of curved 90 ° of fillets, because its tube wall in circular arc outside is longer than the camber line of the tube wall of circular arc inner side, so in bending process, tube wall just trends towards the distortion that percentage elongation is less naturally, so depression easily appears in the tube wall in circular arc outside, as shown in Figure 3.For fear of the generation of this problem, prior art is generally to insert sand at the position that will bend to circular arc of pipe, then carries out bending, bending again sand being poured out afterwards.This method is more for step, and a small amount of bend pipe operation still can be used, if bend pipe is a link of a large amount of workpiece processing, make just to have lost time very much in this way, serious reduction operating efficiency.

Summary of the invention

This patent provides a kind of rectangular tube bend pipe mould for solving the technical problem existing in known technology, uses this mould to carry out bend pipe can to avoid the depression of the tube wall in circular arc outside.

A kind of rectangular tube bend pipe mould, comprise bend pipe mould wheel and front clamping, the outer circumference surface of bend pipe mould wheel has the annular groove that a degree of depth is tubing mid-height, it is characterized in that: also comprise rear clamping and bend pipe plug, rear clamping has a first groove, the side height of first groove is the half of tubing height, the bottom section of groove is a middle arc of more taking turns away from bend pipe mould than two ends, bend pipe plug has the bearing of trend fin consistent with first groove bearing of trend, bend pipe plug cross section is an arc, take turns away from bend pipe mould more than two ends the centre of arc, the afterbody of bend pipe plug is also connected with bend pipe plug connecting rod.

This patent can also be by the following technical solutions:

Preferably, described bend pipe plug has a second groove on its bottom surface.By second groove being set in bend pipe plug bottom, can allow the tube wall of circular arc inner side cave inward, avoided the pipe wall material of circular arc inner side in Forging Process, there is no place to go, form fold.

Advantage and good effect that this patent has are:

Because this patent adopts technique scheme, by fin being set on bend pipe plug, and the corresponding first groove that arranges in rear clamping, the tube wall in circular arc outside is pushed laterally by the fin on bend pipe plug in bend pipe process, thereby allow this part tube wall after bend pipe, form the shape to outer process, the depression of having avoided direct bend pipe to cause, has improved the aesthetic property of curved pipe out.Also avoid all multi-steps in the method for filling sand simultaneously, reduced this operation of bend pipe time used, improved production efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of this patent;

Fig. 2 be this patent in bended pipe, the decomposition section of rear clamping, steel pipe, bend pipe plug, bend pipe mould wheel;

Fig. 3 is the design sketch using after prior art bend pipe;

Fig. 4 is the design sketch using after this patent bend pipe.

In figure: 1, bend pipe mould wheel; 2, front clamping; 3, rear clamping; 31, first groove; 4, bend pipe plug; 41, fin; 42, second groove; 5, bend pipe plug connecting rod; 6, rectangular tube.

The specific embodiment

For further understanding utility model content, the Characteristic of this patent, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:

Refer to Fig. 1 to 2,

A kind of rectangular tube bend pipe mould, comprise bend pipe mould wheel 1 and front clamping 2, the outer circumference surface of bend pipe mould wheel has the annular groove that a degree of depth is tubing mid-height, also comprise rear clamping 3 and bend pipe plug 4, rear clamping has a first groove 31, the side height of first groove is the half of tubing height, the bottom section of groove is a middle arc of more taking turns away from bend pipe mould than two ends, bend pipe plug has the bearing of trend fin 41 consistent with first groove bearing of trend, bend pipe plug cross section is an arc, take turns away from bend pipe mould more than two ends the centre of arc, the afterbody of bend pipe plug is also connected with bend pipe plug connecting rod 5.

The bottom surface of described bend pipe plug has a second groove 42, and the bearing of trend of second groove is consistent with the bearing of trend of fin.

The operating principle of this patent is:

During use, first with front clamping and bend pipe mould wheel clamp rectangular pipe 6, to carry out the front of crooked position, then bend pipe plug is inserted into the position that needs bend pipe.On bend pipe plug, fin is set, and the corresponding first groove that arranges in rear clamping, the tube wall in circular arc outside is pushed laterally by the fin on bend pipe plug in bend pipe process, thereby allow this part tube wall after bend pipe, form the shape to outer process, as shown in Figure 4.Along with rotatablely moving with respect to rear clamping and bend pipe plug occurs for bend pipe mould wheel, front clamping, the position of bend pipe plug in rectangular tube constantly retreats, also each section that makes rectangular tube is by bend pipe region in its stress deformation, and the inwall of outer arc can both be subject to the fin of bend pipe plug to outer support.Owing to second groove being set in bend pipe plug bottom, can allow the tube wall of circular arc inner side cave inward, avoided the pipe wall material of circular arc inner side in Forging Process, there is no place to go, form fold.Adopt in this way, avoided filling out in prior art the filling in the way of sand and discharged the process of sand, improved operating efficiency.

Although by reference to the accompanying drawings the preferred embodiment of this patent is described above; but this patent is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under the enlightenment of this patent; not departing from the scope situation that this patent aim and claim protect, can also make a lot of forms, within these all belong to the protection domain of this patent.

Claims

1. a rectangular tube bend pipe mould, comprises bend pipe mould wheel and front clamping, and the outer circumference surface of bend pipe mould wheel has the annular groove that a degree of depth is tubing mid-height, it is characterized in that: also comprise rear clamping and bend pipe plug,

Rear clamping has a first groove, and the side height of first groove is the half of tubing height, and the bottom section of groove is a middle arc of more taking turns away from bend pipe mould than two ends,

Bend pipe plug has the bearing of trend fin consistent with first groove bearing of trend, and bend pipe plug cross section is an arc, and the centre of arc is than two ends more away from bend pipe mould wheel, and the afterbody of bend pipe plug is also connected with bend pipe plug connecting rod.

2. rectangular tube bend pipe mould according to claim 1, is characterized in that: described bend pipe plug has a second groove on its bottom surface.