CN203696227U

CN203696227U - Tool for special-shaped spray pipe diffusion welding with bidirectional bulging

Info

Publication number: CN203696227U
Application number: CN201420033187.0U
Authority: CN
Inventors: 曾赟; 全书浩; 童小波
Original assignee: CHANGDE XIANGYU EQUIPMENT MANUFACTURING Co Ltd
Current assignee: CHANGDE XIANGYU EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2014-01-20
Filing date: 2014-01-20
Publication date: 2014-07-09
Anticipated expiration: 2024-01-20

Abstract

A tool for special-shaped spray pipe diffusion welding with bidirectional bulging comprises an upper bulging petal, a lower bulging petal, an upper bulging core, a lower bulging core, an upper pressing block, a lower pressing block, an upper limiting block and a lower limiting block. The upper bulging petal and the lower bulging petal are respectively of a petal segmentation structure. The segmentation position of the upper bulging petal and the segmentation position of the lower bulging petal are located on the smallest-diameter position of the throat portion, the upper bulging petal and the lower bulging petal are respectively divided into two sections, one section of the upper bulging petal is designed to be of a positive taper and a negative taper, and the taper of the section, close to the lower bulging petal, of the upper bulging petal is identical to the taper of the lower bulging petal in direction; bulging is designed to be bidirectional, the bulging cores are designed to be the upper bulging core and the lower bulging core, the small end of the upper bulging core is provided with an annular boss, the upper bulging quantity set as h1, the lower bulging quantity is set as h2, and the bidirectional bulging quantity is set as h3, wherein h1+h2<h3, the length of the lower bulging core is larger than the smallest size of the throat portion, and the bulging cores are connected with the pressing blocks through screws. The tool for special-shaped spray pipe diffusion welding with bidirectional bulging has the advantages of being simple in structure, good in reliability and capable of improving the machining efficiency of the part, reducing the assembly difficulty of the part, improving the diffusion welding effect of the part and better stabilizing the quality of a connector.

Description

A kind of special-shaped jet pipe Diffusion Welding frock of two-way bulging

Technical field

The utility model relates to special welding, i.e. a kind of special-shaped jet pipe Diffusion Welding frock of two-way bulging.

Technical background

Diffusion welding (DW) refers under uniform temperature and pressure, being connected surface is in contact with one another, make the local micro-plastic deformation of generation in interface, or produce microcosmic liquid phase and expand and be connected surperficial physical contact by being connected surface, then the phase counterdiffusion of process certain hour between the atom of interface, forming the reliable process connecting of entirety, is in the solid-state lower welding method that material connects that realizes, and belongs to the one of pressure welding.The object of diffusion welding (DW) be to make two independently part form an entirety by Diffusion Welding, in the indeformable situation of workpiece, increase part strength.This kind of bond pattern is to complete under high vacuum, high temperature, condition of high voltage, can be divided into three phases:

First stage is the physical contact stage, and not plane surface of microcosmic under high temperature, under impressed pressure effect, makes some points first reach plastic deformation by surrender and creep, and under continuous effect, contact area expands gradually, finally reaches the reliable contact of whole.

Second stage is the interatomic phase counterdiffusion of contact interface, forms firmly binder course, and this one-phase disappears many spaces because grain boundaries atom continues diffusion.

Phase III is in the time exerting pressure, and the binder course that contact portion forms, gradually to volume future development, forms jointing reliably.

This process mainly realizes by Diffusion Welding frock.This Fixture Design should appropriate products in type structural limitations, guarantee that again frock assembling is simple and difficulty of processing is little; In use procedure, also must there is enough intensity, connecting surface is fully contacted, form the reliable connection of entirety.And middle throat section diameter is little, the extraordinary jet pipe that two ends diameter is large has increased difficulty just to design and the Diffusion Welding process of frock.

Summary of the invention

Little in order to solve mid portion diameter, all connecting surfaces of extraordinary jet pipe that two ends diameter is large are welded completely, and the utility model provides a kind of special-shaped jet pipe Diffusion Welding frock of two-way bulging.

The special-shaped jet pipe Diffusion Welding frock of this two-way bulging, comprise swollen lobe, lower swollen lobe, upper expansion core, lower expansion core, upper holder block, lower lock block, upper limit position block and lower position block, it is characterized in that, upper and lower swollen lobe is splitted structure, upper and lower swollen lobe segmentation position is fixed on to the minimum place of throat diameter, guarantee that swollen lobe is easy to assembly, upper and lower swollen lobe is respectively divided into two sections simultaneously, facilitate inner conical surface processing, upper swollen lobe wherein one section be designed to positive and negative two taperings, wherein consistent with lower swollen lobe taper direction near one section of tapering of lower swollen lobe, bulging direction is designed to two-way, so expansion core is designed to, lower expansion core, upper expansion core small end is designed with annular concave platform, in order to guarantee that the two-way bulging amount of part sum is less than, distance between lower expansion core small end face, if the h1 swollen row amount that is upper end, h2 is the swollen row amount in lower end, h3 is two-way swollen row amount, h1+h2 < h3, guarantee that required soldering part bulging amount is enough, lower expansion core length exceedes throat's minimum dimension, be convenient to increase throat's minimum position interface pressure in Diffusion Welding process, to guarantee welding effect, between expansion core and briquetting, be connected with screw, more stable when making Assembly of the parts and exerting pressure.

The utility model is simple and reasonable, and good reliability can improve part working (machining) efficiency, reduces the assembly difficulty of part; Can improve part Diffusion Welding effect, make joint quality more stable, better control technological parameter, obtain larger economic benefit simultaneously.

accompanying drawing explanation:

Fig. 1-1st, the main pseudosection of part to be welded

Fig. 1-2 is part A-A profile to be processed

Fig. 1-3rd, parts locally to be processed (I) enlarged drawing

Fig. 2 is the distinguish figure of swollen lobe

Fig. 3 is the utility model entirety assembling prelocalization figure

Fig. 4 is the utility model installation diagram

Fig. 5 is relative position and upper and lower swollen lobe segmentation partial schematic diagram before expansion core Diffusion Welding

Fig. 6 is relative position schematic diagram after expansion core Diffusion Welding completes

In figure: 1: lower lock block, 2: lower position block, 3: lower swollen lobe one, 4: lower swollen lobe two, 5: lower expansion core, 6: upper swollen lobe one, 7: upper swollen lobe two, 8: upper expansion core, 9: upper limit position block, 10: upper limit position block, 11: part, 12: equal height cushion block (3), 13, inwall, 14, outer wall, 15, cavity, 16, rib, 17, swollen lobe segmentation position.

the specific embodiment:

Below in conjunction with accompanying drawing, the technical solution of the utility model is described further.

As Fig. 1-1,1-2,1-3 are depicted as part example to be welded, part divides inwall 13 and outer wall 14, has cavity 15 and rib 16 on inwall 13, and rib 16 is Diffusion Welding part with the contact-making surface of outer wall 14; Length L > 450, minimum diameter D1 < 110, and leave one's post meaning end face distance L1, L2 of minimum diameter place is all greater than 200, exert pressure if this type constitutional detail is unidirectional, expansion core is long like this, and diameter is little, add man-hour size be difficult to control, and cannot bear the required pressure of weld parts process, and can cause part to need connecting surface discontinuity, cannot reach the designing requirement of part.

According to part characteristics design time expansion core 5, the two-way bulging expansion core of upper expansion core 8, for solving difficult processing, discontinuity and assembling difficult problem.

As shown in Figure 2, be the distinguish figure of swollen lobe, generally for easy to assembly, swollen lobe is divided into 9 lobes, wherein a lobe is divided into straight section, is made as the 1. lobe.

As shown in Figure 3, first by lower lock block 1 and lower expansion core 5 use screw lock, be placed on flat board, put equal height cushion block 12, equal height cushion block 12 highly equals h2, be conducive to determine swollen lobe and part relative position in the time of the swollen lobe of assembling, then put successively lower position block 2, lower swollen lobe 1, lower swollen lobe 24, then put part according to swollen lobe external form.

As shown in Figure 4, just the swollen lobe 1 of fit on, upper swollen lobe 27, upper expansion core 8, upper limit position block 9, upper holder block 10 successively after part packages, and by screw lock, then lower position block 2, upper limit position block 9 are lived with argon arc welding spot welding with part main body, then taken out equal height cushion block 12.Upper swollen lobe assembling is not simple profile relation with part, there is relative position requirement, by the analog computation of distinguish form, determine the distinguish form of upper swollen lobe 1 and upper swollen lobe 27, the spatial value that while guaranteeing upper swollen lobe manual assembly, hand operation forms is less than diameter D2.This pattern assembling does not need to worry swollen lobe orientation problem, need not be inverted part, has reduced assembly difficulty, has increased the stability packing in diffusion brazier.

As shown in Figure 5, in conjunction with Fig. 3, in the time of part initial designs, need meet h1+h2 < h3, h1 < h4, can not hinder like this part and in Diffusion Welding process, complete bidirectional pressing process; In upper swollen lobe one 6 lower ends, wimble fraction is consistent with lower expansion core 5, and upper swollen lobe 1 is played to positioning action, makes throat's arc transition position stressed even simultaneously, can improve part contact-making surface quality of weld joint, reduces defect.

As shown in Figure 6, after Diffusion Welding completes, between upper and lower expansion core end face, have gap h6, the monolateral gap h5 that exists, can prevent from interfering between expansion core, meets instructions for use.

Claims

1. the special-shaped jet pipe Diffusion Welding frock of a two-way bulging, comprise swollen lobe, lower swollen lobe, upper expansion core, lower expansion core, upper holder block, lower lock block, upper limit position block and lower position block, it is characterized in that, upper and lower swollen lobe is splitted structure, upper and lower swollen lobe segmentation position is fixed on to the minimum place of throat diameter, upper and lower swollen lobe is respectively divided into two sections simultaneously, upper swollen lobe wherein one section be designed to positive and negative two taperings, wherein consistent with lower swollen lobe taper direction near one section of tapering of lower swollen lobe; Upper expansion core small end has annular concave platform, and establishing h1 is the swollen row amount in upper end, and h2 is the swollen row amount in lower end, and h3 is two-way swollen row amount, h1+h2 < h3, and lower expansion core length exceedes throat's minimum dimension, between expansion core and briquetting, is connected with screw.