CN201020594Y

CN201020594Y - Non-heated wire submerged arc welder

Info

Publication number: CN201020594Y
Application number: CNU2007200315825U
Authority: CN
Inventors: 张鹏贤; 张瑾; 梁卫东
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2007-04-13
Filing date: 2007-04-13
Publication date: 2008-02-13
Anticipated expiration: 2017-04-13

Abstract

The utility model relates to a cold wire submerged arc welding device, aiming at reducing the overheating damage caused by high input energy to the mother plates and welding seams, and the occurrence of local softening; besides, the utility model is also expected to make full use of the heat source of arc welding to improve the melting efficiency and obtain favorable seam formation and welding quality. In the arcing wire feed mechanism of the utility model, the arcing wire 5 is driven by two pairs of feed trolleys powered by a DC motor, and is sent to the welding pool through a fixing sleeve 2 and a conductive nozzle 1; the cold wire adjustment mechanism is composed of a positioning sleeve 7, a positioning plate 9, a rotating pair 8 and a fastening nut 11; the cold wire feed mechanism consists of two pairs of feed trolleys 4- and a DC motor; the cold wire 6 is driven by the feed trolleys 4-, and projects out through a snakelike hose in the positioning sleeve 7 and a positioning nozzle 12; the positioning sleeve 7 can slide circumferentially on the slide way 10 of the positioning plate 9, with the rotating pair 8 as an axle; the positioning plate 9 is installed on the fixing sleeve 2; the axial line of the fixing sleeve is vertical to the horizontal plane; the included angle between the positioning sleeve 7 and the axial line of the fixing sleeve 2 is less than 90 degrees.

Description

A kind of cold silk submerged arc welding apparatus

Technical field

The utility model relates to the Lincoln weld in the arc welding, and International Classification of Patents is B23K9/18.

Background technology

Lincoln weld is a kind of by melt flux participation weld seam metallurgical reaction while formation air cavity air-isolation under welding flux layer, and consumable electrode is as filling metal and forming joint, the large-line energy fusion welding method of realization connection with the common fusion-crystallization of welded piece material.But this process is when the material of heat sensitivity persistent erection slabs such as welded pipeline steel, high-strength steel, and large-line energy softens the infringement such as grade to the overheated heat affected area of causing that mother metal brings.

Present multifibres multi sphere submerged-arc welding method in industrial employing, at welding some thick plates structure (large-scale hull, welded still pipes, thick-walled pressure vessel, the H section steel beam) in, nearly 3～6 wire feeding motors have been used, the multiarc welding of 3～10 root bead silks can be carried out simultaneously, speed of welding and production efficiency can be improved greatly.But this multiarc welding method, its essence that improves speed of welding is to realize by the method that improves heat input.Often need postwelding to proofread and correct the problem on deformation that high heat input causes, and ignored fire damage mother metal.When especially adopting monofilament or multiplewire submerged arc welding to connect the strong class material of fine grain, high strength steel and heat sensitivity, macro-energy is input in mother metal and the weld seam, caused pyrolytic damage will for mother metal and weld seam, cause the heat affected area grain coarsening of mother metal, produce the local softening phenomenon, make that the mechanical property of heat affected area is inhomogeneous, influence welding quality and serviceability.

Summary of the invention

The purpose of this utility model is to reduce large-line energy to the generation of crossing pyrolytic damage drawn game portion ruckbildung that mother metal and weld seam cause, and makes full use of the electric arc thermal source simultaneously, improves deposition efficiency, obtains appearance of weld and quality preferably.

The utility model is a kind of cold silk submerged arc welding apparatus, be fixedly mounted on the conventional welding tractor, form by cold silk filling mechanism, arcing silk wire feeder, arcing silk 5 in the arcing silk wire feeder is driven by two pairs of first wire feed rolls 4 that driven by direct current generator, sends into welding pool via fixed muffle 2, the ignition tip 1 that is installed in fixed muffle 2 lower ends; Cold silk filling mechanism is made up of cold silk governor motion and cold silk wire feeder, cold silk governor motion is by abutment sleeve 7, location-plate 9, revolute pair 8, tightening nut 11 is formed, cold silk wire feeder by two pairs second wire feed rolls 4 ' and direct current generator form, cold 6 by second wire feed rolls 4 ' driving, stretch out via snake-like hose in the abutment sleeve 7 and location mouth 12, abutment sleeve 7 serves as that axle is made circumferential slippage on the slideway on the location-plate 9 10 with revolute pair 8, location-plate 9 is installed on the fixed muffle 2, the axial line of fixed muffle 2 is perpendicular to horizontal plane, and the angle of the axial line of abutment sleeve 7 and fixed muffle 2 is less than 90 °.

The utility model is a thermal source with the electric arc that produces between arcing welding wire and welded piece, the cold silk of the filling of adopt a no power, not heating inserts in the overheated molten bath automatically, absorb its unnecessary heat, the distribution ratio of balance molten bath heat, and as weld seam filling metal, the postwelding procedure qualification shows that Weld Performance is good, welding heat affected zone obviously narrows down, and the heat affected area does not have ruckbildung and occurs.

Description of drawings

Fig. 1 is for filling cold silk submerged-arc welding molten bath shaping schematic diagram, and Fig. 2 is the structural representation of cold silk submerged arc welding apparatus.

The specific embodiment

As shown in Figure 1, cold silk submerged arc welding principle of the present utility model is, electric arc with arcing welding wire 5 and 13 generations of welded piece is thermal source, the cold silk 6 that adopt a no power, does not heat inserts in the overheated molten bath, fills metal as weld seam, and the filling position of cold silk 6 is positioned at the centre, high temperature molten bath at arc center rear on relative welding direction of advance, before welding process is finished, at first stop cold silk and send to, and then extinguish arcing welding wire 5, finish whole welding process.

As shown in Figure 2, cold silk submerged arc welding apparatus of the present utility model, be fixedly mounted on the conventional welding tractor, form by cold silk filling mechanism, arcing silk wire feeder, arcing silk 5 in the arcing silk wire feeder is driven by two pairs of first wire feed rolls 4 that driven by direct current generator, sends into welding pool via fixed muffle 2, the ignition tip 1 that is installed in fixed muffle 2 lower ends; Cold silk filling mechanism is made up of cold silk governor motion and cold silk wire feeder, cold silk governor motion is by abutment sleeve 7, location-plate 9, revolute pair 8, tightening nut 11 is formed, cold silk wire feeder by two pairs second wire feed rolls 4 ' and direct current generator form, cold 6 by second wire feed rolls 4 ' driving, stretch out via snake-like hose in the abutment sleeve 7 and location mouth 12, abutment sleeve 7 serves as that axle is made circumferential slippage on the slideway on the location-plate 9 10 with revolute pair 8, location-plate 9 is installed on the fixed muffle 2, the axial line of fixed muffle 2 is perpendicular to horizontal plane, and the angle of the axial line of abutment sleeve 7 and fixed muffle 2 is less than 90 °.

As shown in Figure 2, according to the welding tractor direction of advance of determining (being welding direction), with cold silk submerged arc welding apparatus rotatablely moving through fixed muffle 2, make location mouth 12 at rear with respect to welding direction arcing silk 5, stem elongation (ignition tip 1 is apart from the height of welded piece) according to the definite arcing silk 5 of technological parameter, fixed muffle 2 is slided relatively, make the end of location mouth 12, the distance of ignition tip 1 end and welded piece 13 is on the sustained height, unclamp tightening nut 11, abutment sleeve 7 serves as that axle is made circumferential slippage on the slideway on the location-plate 9 10 with revolute pair 8, when the distance between cold silk 6 and welded piece surface contact point is guaranteed when arcing silk 5 and welded piece surface contact point, tighten tightening nut 11, then cold silk 6 insertion positions are determined.

Claims

1. cold silk submerged arc welding apparatus, be fixedly mounted on the conventional welding tractor, form by cold silk filling mechanism, arcing silk wire feeder, it is characterized in that the arcing silk (5) in the arcing silk wire feeder is driven by two pairs of first wire feed rolls (4) that driven by direct current generator, send into welding pool via fixed muffle (2), the ignition tip (1) that is installed in fixed muffle (2) lower end; Cold silk filling mechanism is made up of cold silk governor motion and cold silk wire feeder, cold silk governor motion is by abutment sleeve (7), location-plate (9), revolute pair (8), tightening nut (11) is formed, cold silk wire feeder is made up of two pairs second wire feed rolls (4 ') and direct current generator, cold silk (6) is driven by second wire feed rolls (4 '), stretch out via snake-like hose in the abutment sleeve (7) and location mouth (12), abutment sleeve (7) serves as that axle is made circumferential slippage on the slideway (10) on the location-plate (9) with revolute pair (8), location-plate (9) is installed on the fixed muffle (2), the axial line of fixed muffle (2) is perpendicular to horizontal plane, and the angle of the axial line of abutment sleeve (7) and fixed muffle (2) is less than 90 °.

2. according to the described cold silk submerged arc welding apparatus of claim 1, the distance that it is characterized in that locating end, ignition tip (1) end and the welded piece of mouth (12) is on the sustained height.