CN103920972A - Welding technology for copper pipe and steel pipe - Google Patents

Abstract

The invention discloses a welding technology for a copper pipe and a steel pipe. The copper pipe and the steel pipe are circular pipes. The technology comprises the steps that (1) the copper pipe and the steel pipe which are in insertion connection or butt connection are integrally fixed to a clamp body rotating on a machine tool at a constant speed; (2) the current of an argon arc welding gun is adjusted, the electric arc heating temperature of the argon arc welding gun is made to reach more than 1000 DEG C, the angle of the argon arc welding gun is adjusted, and the argon arc welding gun is made to be aligned with the portion where the copper pipe is combined with the steel pipe; (3) the argon arc welding gun is started to heat the circumference of the portion where the copper pipe is combined with the steel pipe when the copper pipe and the steel pipe rotate at the constant speed, after heating for 5 s, copper at the portion where the copper pipe is combined with the steel pipe is in the molten state, and steel at the portion where the copper pipe is combined with the steel pipe is in the semi-molten state, the copper and the steel naturally permeate each other and are blended, the copper pipe and the steel pipe are taken out to be cooled, and the copper pipe is tightly connected with the steel pipe. The welding technology is good in environment-friendly performance, easy and convenient to implement, low in cost and safe to use.

Description

Welding procedure between copper pipe and steel pipe

Technical field

The present invention relates to metal circular tube and connect, particularly the welding procedure between a kind of copper pipe and steel pipe.

Background technology

At present at industry-by-industry, the welding procedure of copper pipe and steel pipe, generally adopt gas welding (soldering), scolder is all high silver solder, there is many defects in this technique: peripheral weld is difficult to evenly, operating personnel's skills involved in the labour be had relatively high expectations, careless slightly, welding slag will cause pipe fitting surface irregularity, affects outward appearance; The oxidation of welding rear tubular member is serious, must affect environmental protection through the chemical treatment of operations such as cleaning, antirust, and processing cost is higher; Pipe fitting after chemical treatment, the chemical composition residue that it is surperficial, is difficult to clean out completely, and particularly, around weld seam, some residues can reside in weld seam for a long time, are unfavorable for using safety.

Summary of the invention

The technical problem to be solved in the present invention, is to provide the welding procedure between a kind of copper pipe and steel pipe, and the feature of environmental protection is good, easy and simple to handle, reduces costs, and uses safety.

For solving the problems of the technologies described above, technical scheme of the present invention is: the welding procedure between a kind of copper pipe and steel pipe is provided, and copper pipe and steel pipe are pipe, comprise following processing step:

(1), by copper pipe and the steel pipe integral of pegging graft or docking, be fixed on the clamp body at the uniform velocity rotating on lathe;

(2) regulate the electric current of argon-arc welding gun, its electric arc heated temperature is reached more than 1000 ℃, and adjust the angle of argon-arc welding gun, make it to aim at copper pipe and steel pipe joint portion;

(3) start argon-arc welding gun, in the at the uniform velocity rotation of copper pipe and steel pipe, joint portion circumference to copper pipe and steel pipe is all realized heating, heat after 5 seconds, the copper of copper pipe and steel pipe joint portion in molten state, steel in semi-molten state, the two naturally osmotic blending, then that copper pipe and steel pipe taking-up is cooling, between copper pipe and steel pipe, realize closely and connecting.

Welding procedure between above-mentioned copper pipe and steel pipe, technological operation is easy, because the welding between copper pipe and steel pipe does not need scolder, is physical connection purely, the feature of environmental protection is good, simultaneously easy and simple to handle, greatly reduce labour intensity, exempted all subsequent techniques of welding, greatly reduce processing cost, and pipe fitting connection rear surface and weld seam, without chemical residue, are used safety.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

Fig. 1 is the welding schematic diagram of embodiment mono-;

Fig. 2 is the welding schematic diagram of embodiment bis-.

The specific embodiment

Embodiment mono-:

Referring to Fig. 1, the welding procedure between a kind of copper pipe and steel pipe is provided, copper pipe 1 and steel pipe 2 are pipe, comprise following processing step:

(1) by copper pipe 1 and steel pipe 2 integral body of pegging graft, be fixed on the clamp body 3 at the uniform velocity rotating on lathe, be specially copper pipe 1 and be plugged on from the top down in steel pipe 2, in practical application, also steel pipe 2 can be plugged in copper pipe 1;

(2) regulate the electric current of argon-arc welding gun 4, its electric arc heated temperature is reached more than 1000 ℃, and adjust the angle of argon-arc welding gun 4, make it to aim at copper pipe 1 and steel pipe 2 joint portions;

(3) start argon-arc welding gun 4, in the at the uniform velocity rotation of copper pipe 1 and steel pipe 2, joint portion circumference to copper pipe 1 and steel pipe 2 is all realized heating, heat after 5 seconds, because the fusing point of copper is 1083 ℃, the fusing point of steel is 1515 ℃, the copper of copper pipe 1 and steel pipe 2 joint portions in molten state, steel in semi-molten state, the two naturally osmotic blending, then that copper pipe 1 and steel pipe 2 taking-ups is cooling, between copper pipe 1 and steel pipe 2, realize closely and connecting.

Embodiment bis-:

Referring to Fig. 2, the welding procedure between a kind of copper pipe and steel pipe is provided, the difference of itself and embodiment mono-is only, is docking between copper pipe 1 and steel pipe 2, aspect welding procedure and the technique effect obtained, is all on all four with embodiment mono-.

Above-described embodiment is the preferred embodiments of the present invention, and all and the similar structure of the present invention and the equivalence of doing change, and all should belong to protection category of the present invention.

Claims (1)

1. the welding procedure between copper pipe and steel pipe, copper pipe and steel pipe are pipe, it is characterized in that: comprise

Following processing step:

(1), by copper pipe and the steel pipe integral of pegging graft or docking, be fixed on the clamp body at the uniform velocity rotating on lathe;

(2) regulate the electric current of argon-arc welding gun, its electric arc heated temperature is reached more than 1000 ℃, and adjust the angle of argon-arc welding gun, make it to aim at copper pipe and steel pipe joint portion;

(3) start argon-arc welding gun, in the at the uniform velocity rotation of copper pipe and steel pipe, joint portion circumference to copper pipe and steel pipe is all realized heating, heat after 5 seconds, the copper of copper pipe and steel pipe joint portion in molten state, steel in semi-molten state, the two naturally osmotic blending, then that copper pipe and steel pipe taking-up is cooling, between copper pipe and steel pipe, realize closely and connecting.