CN103817398B - A kind of welding procedure that prevents that pipe part weldering from leaking - Google Patents

Abstract

The invention discloses a kind of welding procedure that prevents that pipe part weldering from leaking, it comprises following steps: it comprises following steps: (1), the catheter part scrub that needs are docked; (2), install than the hollow quartz-glass pipe of the little 0.5～2mm of conduit cavity; (3), part is fixed on the stationary fixture of vacuum argon filling welding case and welds; (4), quartz glass tube dissolves completely, then clean up; (5), with regulation test ball check conduit can the general character. The invention has the beneficial effects as follows: solved conduit weldering leakage problem, ratio of briquetting is leaked in the weldering that has improved catheter part, and can not affect welding quality, improved the qualification rate of product, quartz is at high temperature stable simultaneously, with titanium alloy, chemical reaction does not occur, weld seam surfaces externally and internally stable and uniform, contrast uniformity is strong, has reduced workman's labour intensity, has improved production efficiency.

Description

A kind of welding procedure that prevents that pipe part weldering from leaking

Technical field

The present invention relates to a kind of welding procedure that prevents that pipe part weldering from leaking, relate to especially the weldering of titanium alloy tubing partThe welding procedure of leaking, belongs to catheter weld parts technical field.

Background technology

GTAW is in the time that welding quality requires high, shape and baroque part and workman's skillEnergy level, physics, the chemical property of work mood, surrounding environment, equipment operation condition, material itself are closedSystem closely. In actual production, design drawing requires to ensure that through ball rate is after titanium alloy catheter weld parts100% and adopt single welding, double-faced forming; Must ensure that face of weld color is silvery white simultaneously, not allowThe defect such as have pore, be mingled with, difficulty of processing is very big. Therefore, carrying out this type of titanium alloy catheter part welderingWhile connecing, for ensureing qualified quantity, only increase input, common demand and input ratio are 1: 10, onceQualification rate is only 10% left and right. This becomes the thorny problem in batch production always, has not only caused a large amount ofWaste product, strengthened workman's labour intensity, but also directly affect volume production institute planned.

Existing such part conventionally adopts single face welding and double face shaping in the time of welding, disposable 100% through welding, noAllow to exceed weldering spill tag standard, difficulty is large, and product percent of pass is low, especially at the catheter zero that welds minor diameterWhen part, human factor impact is large, and part moment, upper temperature was fast, and inner chamber very easily welds leakage, causes inner cavity of component transversalArea is less than normal, affects its inner chamber design given flow value, cannot meet the relevant parameter under duty.

Summary of the invention

The object of the present invention is to provide a kind of welding procedure that prevents that pipe part weldering from leaking, overcome prior artDeficiency, can solve conduit weldering leakage problem, the weldering of catheter part can be leaked to ratio of briquetting and improve, and can shadowRing welding quality, improve the qualification rate of product.

The object of the invention is to be achieved through the following technical solutions: a kind ofly prevent what pipe part weldering from leakingWelding procedure, it comprises following steps:

(1), by the catheter part scrub of needs docking;

(2) the commissure installation of, docking at catheter part is more hollow than the little 0.5～2mm's of conduit cavityQuartz glass tube, then argon arc welding is symmetrical by hand locates and soldering part;

(3), part is fixed on the stationary fixture of vacuum argon filling welding case and welds and obtain being welded into oneThe part of body, 1700～2500 DEG C of welding temperatures;

(4), by taking out in casing after integrally welded part cool to room temperature, carry out alkali cleaning processingUntil quartz glass tube dissolves completely, then clean up;

(5), with regulation test ball check conduit can the general character.

Described alkali cleaning processing refers to that integrally welded part is inserted to hot NaOH soda bath to be boiled and wash 2～4Individual hour.

Beneficial effect of the present invention is: by quartz glass tube being installed at place to be welded, having solved conduit weldering and leakedProblem, ratio of briquetting is leaked in the weldering that has improved catheter part, and can not affect welding quality, has improved productQualification rate, quartz is at high temperature stable simultaneously, with titanium alloy, chemical reaction does not occur, and weld seam surfaces externally and internally is steadyFixed evenly contrast uniformity is strong, has reduced workman's labour intensity, has improved production efficiency, can also be byThis technology applies to, in the stainless steel and high-temperature alloy steel in military products production, expand its scope of application.

Brief description of the drawings

Fig. 1 is the assembling schematic diagram of conduit of the present invention and union elbow;

Fig. 2 is hollow quartz-glass pipe scheme of installation of the present invention

Fig. 3 is the schematic diagram after the present invention welds;

Fig. 4 is the schematic diagram after hollow quartz-glass pipe of the present invention dissolves.

Wherein, 1-titanium alloy catheter part, 2-tube connector joint, 3-hollow quartz-glass pipe, 4-weldingAll-in-one-piece catheter part.

Detailed description of the invention

Further describe technical scheme of the present invention below in conjunction with accompanying drawing, but claimed scope is not limited toIn described.

Prevent the welding procedure that pipe part weldering is leaked, it comprises following steps:

It comprises following steps:

(1), the titanium alloy catheter part 1 and the tube connector joint 2 that need butt weld are cleaned dryOnly;

(2), as shown in Figure 1, Figure 2, in titanium alloy catheter part 1 and 2 butt welds of tube connector jointJunction install than the hollow quartz-glass pipe 3 of the little 0.5～2mm of conduit cavity, then argon arc by handThe symmetrical location of weldering soldering part;

(3), as Fig. 3, titanium alloy catheter part 1 is fixed on to the stationary fixture of vacuum argon filling welding caseOn weld and obtain integrally welded catheter part 4,1700～2500 DEG C of welding temperatures;

(4), as Fig. 4, after all-in-one-piece catheter part to be welded 4 cool to room temperature, in casing, takeGo out, deliver to surface treatment workshop and boil and wash 2～4 hours until quartz glass with hot NaOH soda bathPipe dissolves completely, then cleans up;

(5), check conduit with the test ball of regulation can the general character, ensure that qualification rate is not less than 95%.

The titanium alloy catheter part that the present invention makes dissects rear inspection weld seam inner surface, and accessory inner surface is smoothEvenly, after part being heat-treated, dissect simultaneously, carry out metallographic examination, part even tissue.

Prior art adopts high temperature resistance, easily the material removed is as filler, and while preventing from welding, molten bath subsidedMany, cause weldering to be leaked and exceed standard, affect through ball rate. And the anti-fusing temperature of the hollow quartz-glass pipe that the present invention adoptsDegree is more than 2800 degree, and the fusion temperature of the titanium alloy (TA15) of use is more than 1600 degree, is weldingCheng Zhong, the temperature resistance of glass tube is effective, and the coefficient of expansion is little, and at high temperature stablize and can ensure certain intensity,It is the good selection of welding filler.

Claims (1)

1. prevent the welding procedure that pipe part weldering is leaked, it is characterized in that: it comprises following steps:

(1), by the catheter part scrub of needs docking;

(2), install than the hollow stone of the little 0.5～2mm of conduit cavity in the commissure of catheter part dockingEnglish glass tube, then argon arc welding is symmetrical by hand locates and soldering part;

(3), part is fixed on the stationary fixture of vacuum argon filling welding case and welds and obtain being welded into oneThe part of body, 1700～2500 DEG C of welding temperatures;

(4), will after integrally welded part cool to room temperature, in casing, take out, carry out alkali cleaning and process straightDissolve completely to quartz glass tube, then clean up;

(5) what, check conduit with the test ball of regulation can the general character;

Described alkali cleaning processing refers to that integrally welded part is inserted to hot NaOH soda bath to be boiled and wash 2～4Individual hour.