CN101298089A

CN101298089A - Pipe-expansion mold

Info

Publication number: CN101298089A
Application number: CNA2007100221358A
Authority: CN
Inventors: 林洪才; 陶志高; 丁冬
Original assignee: HEFENG MACHINERY MANUFACTURING Co Ltd ZHANGJIAGANG CITY
Current assignee: HEFENG MACHINERY MANUFACTURING Co Ltd ZHANGJIAGANG CITY
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-11-05

Abstract

The invention discloses a labor-saving, fast pipe-expansion die with high extensibility, which comprise a die holder and a pipe-expansion die; the die holder comprises a die holder body and a cover plate; a guide hole and a working hole which are mutually run-through are cut at two sides of the die holder body; the pipe-expension die comprises a pyramidal core shaft, an elastic washer and a pipe-expansion body which is composed of at least two combined pipe-expansion monomers of which the inner walls cooperate with the outer wall of the core shaft, and therefore a pyramidal hole formed in the pipe-expansion body coincides with the core shaft; the elastic washer is sheathed at the bottom of the pipe-expansion body and is clasped in the working hole by the cover plate; the core shaft runs through and is arranged in the guide hole and the pyramidal hole. The pipe-expansion die is mainly used in various pipe-end forming devices.

Description

A kind of pipe-expansion mold

Technical field

The present invention relates to a kind of mould, refer more particularly to a kind of pipe-expansion mold.

Background technology

As everyone knows, such as the pipe fitting of the pipeline that is used for automobile, air-conditioning, its pipe end all will form through rise pipe or draw operation.In the plumber's preface that rises, the clamping device (usually said clamping) by the clamping pipe fitting cooperatively interacts with pipe-expansion mold, and required form is processed in the end of pipe fitting.As shown in Figure 1, a kind of pipe-expansion mold commonly used comprises: die holder 1 and the pipe die 2 that rises that is arranged in the die holder 1.The course of work of this pipe-expansion mold is: at first will need pipe fitting processed 4 to be clamped in the clamping 3, on die holder 1, apply an axial thrust then, this thrust is directly delivered on the pipe die 2 that rises, the feasible inwall that rises by pipe die 2 and pipe fitting 4 constantly pushes, and at last required shape is processed in the end of pipe fitting 4.There is following shortcoming when pipe end being risen by the pipe shaping with this pipe-expansion mold:

1, need enough big axial thrust just can overcome move ahead resistance in the process of the pipe die that rises, the feasible pipe die fltting speed that rises is slow, has reduced the efficient of the pipe that rises;

2, in the progradation of pipe die that rises, the resistance that the pipe die that rises is subjected to advances the increase of the degree of depth along with it and increases progressively, so just determined that the above-mentioned pipe die that rises is unsuitable long, shaping length in order to ensure pipe end, the ductility that just must reduce pipe end is the expansion ratio of pipe end, makes that its ductility is relatively low; Need the pipe end of higher ductility for some, just need the process secondary to rise and manage and to be shaped; And the secondary pipe that rises just needs to change the pipe die that rises, reorientate, and this not only can cause the further decline of the tube efficiency that rises, but also can have influence on the axiality behind the pipe that rises.

Summary of the invention

Technical problem to be solved by this invention is: the pipe-expansion mold of provide a kind of and firmly economize, speed is fast and ductility is high.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of pipe-expansion mold, comprise: the die holder and the pipe die that rises, described die holder comprises die holder body and cover plate, the both sides of die holder body offer the pilot hole and the working hole of mutual perforation, the described pipe die that rises comprises: the taper mandrel, elastic washer, and by at least two its inwalls match with the outer wall of mandrel respectively rise the pipe monomer lump together the body that rises that constitutes, the bellmouth and the mandrel that form in the feasible body that rises match, the rise bottom of body is arranged with elastic washer, and with cover plate it is fastened in the working hole, mandrel is located in pilot hole and the bellmouth.

Above-mentioned elastic washer is a rubber washer.

All that constitute the above-mentioned body that rises rise and are provided with positive stop lug boss on outer walls of pipe monomers.

The invention has the beneficial effects as follows: the present invention is by the cone match between the bellmouth among the mandrel and the body that rises, make the major part that is applied to the axial thrust on the mandrel all change into the expansionary force that the body that rises is outside, because the distance of axially advancing of mandrel is more many greatly than the distance of the expansion radially outward of the body that rises, thereby can save many power, so just can improve the fltting speed of the pipe die that rises, the pipe time reduces to rise; But also mandrel and the body lengthening of rising can be improved the ductility of the pipe that rises, guarantee that the pipe end pipe that once rises is shaped.

Description of drawings

Fig. 1 is the cross-sectional view of the pipe-expansion mold described in the background technology, pipe fitting and clamping;

Among Fig. 1: 1, die holder, 2, the pipe die that rises, 3, clamping, 4, pipe fitting.

Fig. 2 is a main TV structure schematic diagram of the present invention;

Fig. 3 is the A-A cross-sectional view of Fig. 2;

Fig. 4 is the blast structural representation of Fig. 3;

Fig. 5 rises to manage the perspective view of monomer;

Among Fig. 2 to Fig. 5: 1, die holder body, 11, pilot hole, 12, working hole, 2, cover plate, 3, mandrel, 4, the body that rises, 41, the pipe monomer that rises, 411, positive stop lug boss, 42, bellmouth, 5, elastic washer, 6, pipe fitting.

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing:

Extremely shown in Figure 5 as Fig. 2, a kind of pipe-expansion mold of the present invention, comprise: the die holder and the pipe die that rises, described die holder comprises: die holder body 1 and cover plate 2, the both sides of die holder body 1 offer the pilot hole 11 and the working hole 12 of mutual perforation, the described pipe die that rises comprises: the cone-shaped mandrel 3 of octahedral, elastic washer 5, and by eight its inwalls respectively the pipe monomer 41 that rises that matches of eight inclined-planes on mandrel 3 outer walls lump together the body 4 that rises that constitutes, eight inclined-planes that constitute bellmouth 42 in the feasible body 4 that rises match with eight inclined-planes of mandrel 3 outer walls respectively, the rise bottom of body 4 is arranged with elastic washer 5, and with cover plate 2 it is fastened in the working hole 12, described mandrel 3 is located in pilot hole 12 and the bellmouth 42.In the present embodiment, described elastic washer 5 is a rubber washer, described mandrel 3 is positive eight pyramids, and the size and dimension of eight pipe monomers 41 that rise that constitutes the body 4 that rises is identical, is provided with positive stop lug boss 411 on the relevant position of the outer wall of eight pipe monomers 41 that rise; The position is set determines according to the relative dimensions of the end of need pipe fitting processed 6 of positive stop lug boss 411.

The course of work of the present invention is: at first pipe fitting 6 is enclosed within on the body 4 that rises and the end face of pipe fitting 6 is resisted against on the positive stop lug boss 411, then, be fixed by the clamping described in the background technology; Next just enter the pipe process that rises, on mandrel 3, apply an axial thrust, its depth to the body 4 that rises is advanced, because mandrel 3 is a cone match with rising between the body 4, make the major part of this axial thrust all change into the outward expansion force of the body 4 that rises, make that the tube wall that is sleeved on the pipe fitting 6 on the body 4 that rises is expanded thereupon, until the ductility that the tube wall arrival of pipe fitting 6 is set, the pipe process that rises finishes; Next enter knockout course, mandrel 3 is extracted out from the body 4 that rises, eight pipe monomers 41 that rise radially inwardly shrink under the effect of elastic washer 5, pipe fitting 6 separates gradually with draw body 4, when elastic washer 5 recovers fully, the pipe monomer 41 that rises is just got back to the position before the pipe that rises, and knockout course finishes, and gets ready for the pipe that rises next time.In the pipe process that rises,, thereby can economize many power because the distance that mandrel 3 distance of axially advancing is radially outward expanded than the body 4 that rises is many greatly.Like this, not only can improve the fltting speed of mandrel 3, with the raising tube efficiency that rises; Simultaneously, the mandrel 3 and body 4 lengthenings that rise can also be improved the pipe ductility that rises, guarantee that the pipe end pipe that once rises is shaped.

Claims

1. pipe-expansion mold, comprise: the die holder and the pipe die that rises, it is characterized in that: described die holder comprises die holder body [1] and cover plate [2], the both sides of die holder body [1] offer the pilot hole [11] and the working hole [12] of mutual perforation, the described pipe die that rises comprises: taper mandrel [3], elastic washer [5], and the body that rises [4] that lumps together formation by the pipe monomer [41] that rises that at least two its inwalls match with the outer wall of mandrel [3] respectively, the bellmouth [42] that forms in the feasible body [4] that rises matches with mandrel [3], the rise bottom of body [4] is arranged with elastic washer [5], and with cover plate [2] it is fastened in the working hole [12], mandrel [3] is located in pilot hole [11] and the bellmouth [42].

2. pipe-expansion mold as claimed in claim 1 is characterized in that: all that constitute the described body that rises [4] rise and are provided with positive stop lug boss [411] on outer walls of pipe monomers [41].