A torch for arc welding with non-consumable electrode gas-shielded
(57) Abstract:Usage: manual arc welding of metals. The inventive burner for arc welding with a consumable electrode in a protective gas contains chocolatada 1, which is connected through the header 3 with two mutually spring-loaded chocolaterie tubes 2 with the lugs 18 and the outer electrical insulation passing through the non-circular hole of the retainer 6 and secured by a single cone by inserting in the arm and another end pivotally connected with the housing of the welding head. In the welding head includes a cap 10 for fixing the electrode 11 a collet Chuck and a ceramic nozzle 14. The weld head is further provided with a sleeve 5 made of insulating material, the seal 15 and the insulating rings 13. On the sleeve 5, which is located inside the arm, rigidly mounted latch 6, the sealing ring 15 is installed between the housing and the cap, and an insulating ring 13 between the casing and the ceramic nozzle 17 of the welding torch, with tamogatottsaga inside sleeve fixed conical tube of elastic material. 1 C. p. F.-ly, 6 ill. The invention relates to the field of manual arc welding of metals and can be apollow and their alloys.Famous torch for arc welding with a consumable electrode in a protective gases, including chocolatada associated with two mutually spring-loaded chocolatepuma tube mounted at one end in the handle with the possibility of longitudinal displacement and rotation about the axis of the arm, and the other pivotally connected with the burner head.The disadvantage of this burner is the complexity and inconvenience of its design when replacing the welding head.The invention is directed to solving the task of creating a safe, convenient in operation of the structure of the welding torch for reliable fixation chocolatepuma pipes and the welding electrode during welding, and, consequently, improving the quality of welded joints.To achieve a technical result torch for arc welding neplavyaschimsya electrode in a protective gas containing chocolatada connected through a manifold with two mutually spring-loaded chocolaterie tubes with tips and the outer electrical insulation passing through the non-circular hole of the retainer and secured at one end by inserting in the arm and another end pivotally connected with the body sunetele provided with a sleeve of insulating material, sealing and insulating rings on the sleeve located inside the arm, rigidly mounted retainer, o-ring installed between the housing and the cap, and an insulating ring between the housing and the ceramic nozzle of the welding head, tamogatottsaga inside sleeve fixed conical tube of elastic material.In addition, to improve the safety of operation of the burner outer surface of the lugs are spherical and chocolaterie tube equipped with hard shells in the setup tab.The technical solution is illustrated in the drawings, where Fig.1 shows a General view of the burner Assembly of Fig.2 burner, prepared to change the welding head with divorced chocolaterie tubes; Fig.3 section a-a in Fig.1 in the scale M2 1; Fig.4 cross-section B-B in Fig.2 in the scale M2 1; Fig. 5 section b-b of Fig.2 in the scale M2 1; Fig.6 burner in position.Burner contains chocolatada 1, which is connected with the supplied outer electrically isolated chocolaterie tubes 2 through rigidly mounted on them collector 3, a rubber knob 4, the inside of the sleeve 5 made of insulating material, the fix is whether the multifaceted bore 8, as well as the welding head, comprising a casing 9, the cap 10 with the outer knurled surface for easy tightening welder, used for fastening a consumable, such as tungsten, electrode 11 of the collet 12, the insulating ring 13 is installed between the housing 9 and the ceramic nozzle 14 to reduce heat transfer from the heated nozzle 14 onto the housing 9, and a sealing ring 15 between the housing 9 and the cap 10, which provides a constant tension collet clamp 12 with the electrode 11 in the longitudinal direction, and also seals the housing 9 from the output of the shielding gas.Chocolatada 1 chocolaterie tube 2 is fixed in the sleeve 5 split conical tube 16 of elastic material, fixing chocolatepuma tube 2 with welding head in the longitudinal direction of the handle 4. Between the sleeve 5 and the arm 4 is placed composite insert in the form of two inserts 16 conical shape forming a slit 17 through tube 2, provided with lugs 18 having an outer spherical surface 19 and the housing 9 of the burner head is made corresponding in shape and size of diametrically spaced holes 20 and aligned them with the recesses 21, which includes the lugs 18. These development is to ensure reliable contact with the frame 9 of the welding head tip 18 chocolatepuma tubes 2. On chocolatepuma tubes 2 at the site of contact with the retainer 6 has a rigid shell 22, which protects the insulation tube 2 from abrasion, and the lugs 18 provided with holes 24 for supplying a gas into the housing 9 of the head, in which are provided holes 25 for the gas outlet in a ceramic nozzle 14. On the handle 4 set button of the microswitch 26 is offset relative to the longitudinal axis, which provides convenience in the work of the welder.In Fig.6 positions 27 and 28 are marked accordingly lighted electric arc and svarivaemost product.The burner of the claimed design works as follows.Pre-installed departure electrode 11 with respect to the ceramic nozzle 14, and then configures the burner by turning chocolatepuma tube 2 around the longitudinal axis of the arm 4 and the rotation of the welding head around the conical tip 18 at the angle defined by the welding unit 28.By pressing the button 26 includes a voltage from a power source (not shown) and the supply of protective gas, for example argon, chocolatedkodm 1 to the housing 9 of the welding head through the header 3, chocolaterie tube 2 and the lugs 18.
ofreeing chocolatepuma tube 2, which is moved in the gap between the inserts 16 in the transverse relative to the longitudinal axis of the handle 4 direction. The lugs 18 due to the elasticity chocolatepuma tubes 2 extend from mating with the holes 20, the weld head is removed and replaced with another, the lugs 18 are inserted through the depression 21 in the holes 20, then the welder by the lock 6 compresses the tube 2, locking them.Thus, compared with the prototype of the proposed burner provides the best quality of welded joints due to the fixation chocolatepuma pipes and the welding electrode, and also meets the safety requirements. 1. A torch for arc welding with non-consumable electrode shielding gas containing chocolatebrown, coupled with the two mutually spring-loaded chocolaterie tubes with end caps and outer electrically isolated, fixed at one end in the handle, and another end pivotally connected with the casing head, and a retainer, characterized in that stuff from elastic material and a collector, the latch is made with a non-circular opening for passage chocolatepuma tubes, the head is made with a ceramic nozzle and cap for fixing the electrode, with the bushing installed inside the handle, o-ring installed between the casing and the cap insulating ring is installed between the casing and the ceramic nozzle head, the collector is installed on chocolateproduct.2. Burner under item 1, characterized in that chocolatepuma tube equipped with hard shells in the setup tab.
FIELD: restoration of parts cast of aluminum alloys with use of fusion welding.
SUBSTANCE: method comprises steps of cutting out flaw containing portion spaced equidistantly by distance (3 - 8)n from boundary of flaw; making insert of deformed aluminum alloy welded with casting alloy of restored part at relation of coefficients of percentage elongation Gd/Gc = 9 - 25, where Gd and Gc coefficients of percentage elongation respectively of deformed and casting aluminum alloys, n - thickness of cast part in restoration zone.
EFFECT: lowered labor consumption at restoring parts of aluminum alloys.
3 dwg, 1 tbl
FIELD: processes for making large-size thick-sheet orthotropic plates of carbon low-alloy steels in different branches of industry, particularly for bridge building.
SUBSTANCE: method comprises steps of relative orienting members of orthotropic plates; tack welding oriented members by means of non-consumable tungsten electrode in mixture of shield gases Ar (95 - 97)% + (3 - 5%) CO2 ; performing automatic continuous-seam welding and then trimming surface of welded seam. It allows simplify method for making welded large-size thick-sheet orthotropic plates of carbon low-alloy steels.
EFFECT: lowered labor consumption, shortened time cycle for making enhanced-quality plates, improved reliability of welded structures.
6 dwg, 1 ex
FIELD: electric arc welding of materials by means of non-melting electrode, namely methods for automatic argon-arc pulse welding of steel tubes.
SUBSTANCE: method comprises steps of preliminarily dressing tube butts and forming annular chamfers on inner surfaces of butts; abutting tubes; moving welded edges relative to electrode by step axial rotation of abutted tubes at revolution number 1 -1.5 rev/min; igniting arc 2 - 5 s before starting rotation of tube in order to heat welded seam zone; performing welding by means of torch inclined to tube axis by angle 60 - 85° relative to vertical line; sustaining electric current intensity in range 110 - 155 A for pulse duration 0.7 - 0.9 s; keeping electric current at pause period in range 10 - 30 A for pulse duration 0.5 - 0.7 s. Overlapping value of welded seam is in range 10 - 25 mm. It allows eliminate cracking of welded seam of tubes at bending samples by angle exceeding 160°.
EFFECT: enhanced quality of welded seam of tubes.
3 dwg, 1 tbl
FIELD: automatic welding increased-thickness joints of titanium alloys in inert gas by means of submerged tungsten electrode.
SUBSTANCE: method comprises steps of forming in welded edges cutout which is in the form of П-shaped dressing of edges at welding parts with slit gap; keeping relation of depth of dressing to its width less than 1; rounding acute angles of dressing; before welding introducing granulated additive material into slit gap and performing first pass at minimally admissible value of shape factor of fusion. In order to provide guaranteed fusion of walls, second and third passes are realized in the same mode. Electrode is placed in such a way that it is shifted relative to butt axis. At double-side welding passes are realized according to next order: first and second passes, then third, fourth and fifth passes.
EFFECT: enlarged manufacturing possibilities of method due to increased limit thickness of welded parts.
3 cl, 5 dwg
FIELD: machine engineering, possibly gas-shield electric arc welding by means of non-consumable electrode.
SUBSTANCE: method comprises steps of alternatively feeding several gases or their mixtures by pulses; at each next pulse feed using gases (gas mixtures) having ionization potentials different in comparison with those of gases or gas mixtures of previous pulse feed; periodically changing electric arc gap simultaneously with gas feed pulses; setting basic voltage of electric arc equal to optimal voltage in medium of gas or gas mixture with minimum ionization potential; setting difference between maximum and minimum voltage values of arc at periods of previous and next pulse feed of gases or gas mixtures in range 1 - 7 V.
EFFECT: enhanced quality of welded joints, possibility for adjusting fusion depth.
1 tbl, 1 ex
FIELD: gas-shield welding process with use of non-consumable electrode, namely torches for such welding.
SUBSTANCE: torch includes body of collet chuck holder. Said body has cylindrical surface near its working end and it is welded to electrically conducting gas conduit. Collet chuck is mounted in body for securing non-consumable electrode. Nozzle has cylindrical surface passing to cone surface and then again passing to cylindrical surface near its working end. Asbestos-cement insulator is arranged on surface of body of collet chuck holder; brass sleeve is put onto said insulator. Insulator is fixed to body by means of pressure ring-splitter having cylindrical surface passing to cone surface with radial openings.
EFFECT: possibility for making small-size torch for welding butts of metallic structures in hard-to-reach places of installation zone.
FIELD: plastic working of metals, namely processes for forming butt welded seams on tubes at making tube studs of U-shaped tube bundles using effect of localized hot plastic deforming of welded seam and near-seam zones.
SUBSTANCE: method comprises steps of preliminarily working tube ends by expanding them from cylinder to cylinder; assembling tubes with use of mandrel and placing intermediate member of additive material between joined end surfaces of end portions of tubes sized by expansion and end surfaces of step ring. Welded seams are formed by argon-arc welding due to melting material of intermediate member at its both sides adjacent to tube ends. The intermediate member is heated up and it is subjected to hot radial squeezing while concentrating its initial deformation in surface layers according to position of ring steps, welded seams and near-seam zones on mandrel for providing size of their outer diameter equal to initial outer diameter of tubes.
EFFECT: improved quality of welded seams.
FIELD: mechanical engineering; argon-arc welding.
SUBSTANCE: invention relates to methods of automatic argon-arc welding of austenitic steel pipes in manufacture of important constructions, such as high-pressure pipes used at nuclear power stations. Proposed method includes mechanical preparation of welding surface zone, veeing edges to miter of 3.0-3.5 mm and subsequent multiple-pass welding with nonconsumable negative electrode using filler wire. Welding edges are veed to miter of 2.7-3.0 mm. Welding at first pass is carried out with heat input of 0.35-0.55 MJ/m by impulse current. Welding at second pass is done with heat input of 0.6-0.86 MJ/m by impulse current at cross oscillations of electrode. Welding at third and subsequent passes is carried out with heat input of 0.62-1.16 MJ/m by steady current with cross oscillations of electrode.
EFFECT: increased capacity art welding and quality of weld joint owing to reduction of intercrystalline cracking of weld joint.
FIELD: mechanical engineering; welding.
SUBSTANCE: invention relates to design of torches for gas-shielded arc-welding by nonconsumable electrode. Proposed head of torch contains chuck with hole for electrode secured in body and gas fed channels, nozzle and partition arranged inside nozzle and formed by pack of gauzes. Gauze partition is made convex relative to welding arc flame. Head is furnished additionally with partition made of pack of gauzes arranged between chuck and gauze convex partition and made concave relative to flame of welding arc. Packs of gauzes are made of stainless steel of 3 to 5 layers. Gauze mesh is 0.3-0.5 mm.
EFFECT: provision of high quality of welding at relatively simple design.
5 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: invention concerns electric arc welding, particularly method of automatic argon arc welding of overlapping joints of steel pipes by non-melting electrode. The method involves preliminary pipe edge preparation and welding by tilted electrode with pipes rotating against electrode to form weld seam. Axial rotation speed of welded pipes is 0.1-0.8 rpm. Electrode is tilted in two planes: by 50-70 degrees against the article axis and by 60-85 degrees against weld seam plane.
EFFECT: improved quality of weld seams in overlapping joints of steel pipes, reduced hopping during rotation of long-length welded article, reduced cost of welded product.
3 cl, 3 dwg, 1 tbl