311results about How to "Control welding deformation" patented technology

The invention provides a method for welding a specially-thick high-strength bridge steel plate and belongs to the technical field of specially-thick plate welding. The test plate of the method adopts a symmetric narrow gap U-shaped groove form, is combinedly welded by using two efficient welding methods, namely gas shielded welding for priming and bottom filling, and double-wire submerged arc welding for continuous filling and finishing, so as to achieve the purposes of reducing filling level and giving full play to the efficient double-wire submerged arc welding and high automation degree. The method has strong operability, greatly improves the welding efficiency of the specially-thick bridge steel plate, and significantly reduces manpower cost. Furthermore, by selecting a proper welding sequence, the method solves the problem that the welding deformation of the specially-thick steel plate is hard to control.

The invention relates to an assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers. The assembly welding tool device comprises a supporting base plate, a ball screw, grouped rolling bearings, a movement air cylinder, external locating blocks, internal locating blocks, a manual rocker and a graduated scale, wherein the ball screw and an executive component drive most of the external locating blocks and most of the internal locating blocks to move along guide rails of the supporting base plate so as to carry out integrated locating clamping fixation on the curved surface end sockets. According to the assembly welding tool device and method commonly used for the large curved surface end sockets of the pressure containers, in the manufacturing process of the pressure containers, tool locating of the large end sockets can be achieved, welding deformation is prevented, the curved surface end sockets are placed on the assembly welding tool device to be clamped in an assembly locating mode, spot fixation is carried out on weld joints, and then welding operation is carried out on the internal weld joints and the external weld joints; after welding is accomplished, the curved surface end sockets are naturally cooled to have the normal temperature, postwelding is carried out on the curved surface end sockets, stress relieving is carried out on the curved surface end sockets, labor intensity of workers is reduced, the production and manufacturing cycle of products is shortened, and the production cost is reduced.

The invention discloses a tank fabricating and welding method, which is characterized by comprising the following steps of: a. fabricating and welding a tank soleplate, wherein the step comprises: (1) paving the soleplate, and (2) welding the soleplate; and b. fabricating and welding a tank wall board, wherein the step comprises: (1) paving the wall board, and (2) welding the wall board, and the step of welding the wall board comprises: 1) temporarily not welding 300mm of the lower edge of a longitudinal weld and welding the lower edge together with a circular seam after being paired with a next sine wall board; 2) when welding the circular seam, enabling welders to be uniformly distributed on the surrounding of the tank and welded in the same direction; 3) selecting the setting distance of an anti-deformation fixture according to the thickness of the wall board before welding the circular seam, the distance of the fixture of the wall board with delta equal to 6mm being 300mm; and 4) selecting an even number of welders when welding the wall board, the levels of the welders being close, and welding with the same vertical seam and circular seam welding parameters. The tank fabricating and welding method disclosed by the invention has the advantages of simple and convenient operation, strong maneuverability and the capability of effectively controlling the welding deformation of the tank.

The invention discloses a welding tooling device for a pillar frame of a machine cabinet and an assembly method of the device, wherein the device comprises a clamp body (1) and is characterized in that a positioning element (2) and a clamping device (3) are fixedly arranged on the clamp body, the positioning element (2) is used for horizontal position limitation of all parts of the pillar frame of the machine cabinet, and the clamping device (3) is matched with the positioning element (2) for clamping all the parts of the pillar frame of the machine cabinet in the horizontal direction. By adopting the device and the method disclosed by the invention, the physical labor of operation staff can be greatly reduced, and the assembly and welding efficiency can be improved; and the welding thermal deformation of a workpiece can be controlled or eliminated, and the instability of manual welding can be reduced.

The embodiment of the invention provides a TIG welding method applicable to moderately thick aluminum alloy. On the condition that beveling is not carried out, the effect of single-face welding and two-face forming effect is achieved. The connector mechanical property and welding efficiency can be greatly improved. The aluminum alloy TIG welding method is used for welding a weld joint between two workpieces and comprises the steps that an outer pressing block is adopted on the front faces of workpieces to be welded, a welding base plate with a welding leakage groove is arranged on the back faces of the workpieces to be welded to tightly support the workpieces, and therefore a weld joint to be welded of the two workpieces to be welded is right opposite to the center of the welding leakage groove; the two steps of backing welding and cosmetic welding are carried out, wherein the TIG welding is adopted for carrying out backing welding on the weld joint to be welded, so that welding leakage is formed on the back face of the weld joint to be welded, and direct forming is achieved; pulse polarity variation TIG welding is adopted for carrying out cosmetic welding.

The invention provides a novel stainless steel side wall structure and a mounting method of a novel stainless steel side wall. The novel stainless steel side wall structure comprises a side wall skeleton. The side wall skeleton is formed by connecting a plurality of cross beams and a plurality of vertical columns in a mutually-crossing mode, and the cross beams and the vertical columns are fixed through mutual inserting; end vertical columns are arranged on the left and right sides of the side wall skeleton correspondingly; door vertical columns are arranged on the left and right sides of doorframes correspondingly; a window upper cross beam is arranged on the upper portion of each window frame, and a window lower cross beam is arranged on the lower portion of each window frame; a waist cross beam is arranged below each window lower cross beam; three lower cross beams are arranged below each waist cross beam; a window upper vertical column is connected to each window upper cross beam;skeleton connecting plates are welded inside the connecting positions of the window upper cross beams and the window upper vertical columns in the side wall skeleton; window lower vertical columns are connected among each window lower cross beam, the corresponding waist cross beam and the three corresponding lower cross beams; and skeleton connecting plates are welded inside the connecting positions of the window lower cross beams and the window lower vertical columns in the side wall skeleton. The cross beams and the vertical columns of the novel stainless steel side wall structure are fixedthrough mutual inserting connection, the deformation problem caused by welding of a skeleton is solved, the production cost is saved, and the assembly production efficiency is improved.

A welding method for a vertically spliced super-thick steel plate is a welding method for a super-thick steel plate with the thickness ranging from 60mm to 120mm. The method is characterized by including: hoisting a primarily spliced super-thick steel plate onto a special jig frame for horizontal welding, fixing the super-thick steel plate with a waler of the jig frame by welding prior to fastening the super-thick steel plate with a ground abutting floor stand by the aid of a wedge, then using carbon dioxide arc welding for sequential symmetry horizontal welding on the front side and the back side of the super-thick steel plate respectively by even welders until spliced plate welding is finished, and finally performing postheat treatment to prevent cracks. The method has the advantages that welding deformation of the spliced super-thick steel plate can be well controlled, welding deformation correction is avoided, welding cracks are prevented, welding quality is improved, and construction requirements are met. The carbon arc air gouging process for back gouging is omitted, welding procedure is simplified, turnover times of the super-thick steel plate are decreased, workload is reduced, labor intensity is relieved, and production efficiency is improved.

The invention relates to a welding jig, in particular to a circular seam laser welding jig for thin-walled aluminum alloy end socket flange plates. The circular seam laser welding jig aims to solve the problems that as no special circular seam laser welding jig for the thin-walled aluminum alloy end socket flange plates exists in the prior art, welding deformation is serious, and the welding accuracy cannot meet the welding requirement. An inner platen is located at the upper end face of an inner platen base, a first circular center groove corresponds to a second circular center groove in an up-and-down mode, a first annular groove is machined in the upper end face of the outer edge of the inner platen base in the circumferential direction, a second annular groove is formed in the lower end face of the inner ring of an outer platen in the circumferential direction, the second annular groove of the outer platen is combined with the first annular groove in a pressed mode, an annular interval is reserved between the outer platen and the inner platen, a plurality of hinge bases are evenly distributed and fixedly installed at the outer edge of a lower disc in the circumferential direction, the lower end of each screw rod is hinged to the corresponding hinge base, and the upper end of each screw rod penetrates through the outer edge of the outer platen and is in threaded connection with a second nut. The circular seam laser welding jig is used for welding the thin-walled aluminum alloy end socket flange plates.

The invention discloses an extensible and retractable inner supporting tool. One end of a left-handed screw is installed in a screw installation hole in the plane geometric center of a supporting plate, and the left-handed screw is in rotating fit with the screw installation hole. A left-hand thread at the other end of the left-handed screw is installed in a threaded hole in the center at one endof a sleeve. One end of a right-handed screw is installed in a screw installation hole in the plane geometric center of the other supporting plate, and the right-handed screw is in rotating fit with the screw installation hole. A right-hand thread at the other end of the right-handed screw is loaded in a threaded hole in the center at the other end of the sleeve. The extensible and retractable inner supporting tool has extending and retracting functions; in a shortened state, the extensible and retractable inner supporting tool can be put into a shell and then extends to support a cylinder, rigid restraining to the cylinder is achieved, and the welding deformation is reduced; and by means of stress relief annealing heat treatment through the belt tool, deformation stress is eliminated, andtherefore the cylinder circular degree after welding is guaranteed, and the circular degree of the shell is reduced to 2.5 mm from 10 mm.

The invention relates to the field of heterogeneous steel welding, in particular to a vacuum electron beam welding method for single-phase austenitic stainless steel (HR-2) and precipitation strengthening austenitic stainless steel (J75) heterogeneous plates (which have the thickness of between 2.0 and 5.0 millimeters). According to the vacuum electron beam welding method for the HR-2 and J75 stainless steel heterogeneous plates, a process comprises the following steps of: performing pre-welding treatment on parent metals, clamping and fixing in a vacuum welding chamber, vacuumizing the welding chamber, welding in a positioning mode, welding by using electron beams in a single circulation mode (the electron beams scan in a deflection mode) and scanning weld joints by using the electron beams in a defocusing mode after welding. According to HR-2 and J75 heterogeneous metal joints, the defects of pores, entrainment and the like are overcome in the joints, and poor gama' areas are not formed in a welding molten pool and a heat affected zone on one side of J75 alloy. The joints of the HR-2 and J75 stainless steel heterogeneous plates welded by the method have good formed surfaces, the strength of the joints is higher than 680 to 700 MPa, and the strength factor of the HR-2 stainless steel can reach over 0.9.

The invention belongs to the technical field of building steel structure, in particular relates to a limb type circular tube node transferring structure and a manufacturing method thereof. The limb type circular tube node transferring structure comprises a trunk circular tube, a fork transitional node which is connected to one end of the trunk circular tube, a limb supporting rod circular tube and a space bracket which is installed on the external surface of the integral node; the fork transitional node is formed by two sections of special cone tubes through a central pull rod and a transverse insertion plate by penetrating; two half tiles at the bottom of the fork transitional node are combined to be an integral circle which is connected with the trunk circular tube; the end portion of the fork transitional node is connected with the two fork supporting rod circular tubes. The limb type circular tube node transferring structure has the advantages of solving the design problem of the circular tube fork connecting node, being simple and reasonable in structural design, attractive in appearance design and the like.

The invention provides a multi-wire submerged-arc multi-layer multi-pass welding process, which includes the steps: firstly, making preweld preparation including preparing and cleaning a welding joint groove, preheating a welding position before welding and selecting proper welding materials; secondly, setting reasonable welding parameters; and thirdly, performing multi-wire submerged-arc multi-layer multi-pass welding. By means of reasonably selecting welding materials, setting the reasonable welding parameters and controlling heat input, preheating temperature and interlayer temperature, the problems of welding cracks, embrittlement of a heat-affected zone and softening of a welding joint are effectively prevented, welding deformation is effectively controlled, the workload of post-weld correction and deformation adjustment is decreased, and welding efficiency and quality are improved.

The invention discloses a method for assembling a pedestal body of an overhead cell support of a hybrid vehicle and a used welding frock clamp thereof. The welding tool clamp comprises a clamp body (1), and the pedestal body of the overhead cell support of the hybrid vehicle comprises two pedestal crossbeams (11) and a plurality of middle supporting plates (12); the clamp is characterized in that a positioning element (2) is fixedly arranged at the upper end of the clamp body and horizontally limits the positions of the pedestal crossbeams (11), and a clamping device (3) is arranged at the outer sides of the pedestal crossbeams (11) and clamps the two pedestal crossbeams (11) and the middle supporting plates (12) arranged between the two pedestal crossbeams. The clamp greatly lightens the physical work of the operating staff, improves the assembling and welding efficiency, controls or eliminates the thermal deformation of workpieces caused by welding, and reduces the instability of manual welding.

The invention relates to a ring crane corbel for a nuclear power station and a manufacturing method thereof, belonging to the technical field of building construction facilities. In the ring crane corbel, a box-type frame main body comprises a rectangular main body plate, wherein an upper cover plate and a lower cover plate are respectively soldered and fixed on one side of the main body plate; a left lateral plate, a right lateral plate and a middle stiffened plate are soldered between the upper cover plate and the lower cover plate; the left lateral plate, the right lateral plate and the middle stiffened plate are soldered with the main body plate; the two ends of one side of the lower cover plate are soldered with the two bottom edges of an external baffle; the upper part of the external baffle extends between the left lateral plate and the right lateral plate after the upper part of the external baffle is bent; the two lateral edges of the upper part of the external baffle are respectively soldered with the inner surfaces of the left lateral plate and the right lateral plate; the other side of the main body plate is soldered with a bent bar; and horizontal and vertical stiffened plates are respectively soldered on corresponding positions on the main body plate, which are soldered with the upper cover plate, the lower cover plate, the left lateral plate, the right lateral plate and the middle stiffened plate. After the ring crane corbel is adopted, the use requirement can be met, and reasonable assembly and soldering sequence are adopted, so the final quality of the ring crane corbel component can be ensured.

The invention discloses a method for manufacturing an inner barrel of a combustor of a gas turbine and a welding fixture of the inner barrel. The method and the welding fixture are characterized in that an N-2-1 positioning method and a symmetrical wandering welding method are achieved through the fixture, and welding deformation of thin-walled barrels such as the inner barrel of the combustor of the gas turbine can be controlled within 1 mm.

The invention discloses a method for controlling welding deformation of a joint between an inserted large inclined tube and a barrel. The method comprises the following steps of: 1, forming a hole on the side part of the barrel; 2, assembling the inserted large inclined tube and the barrel, and welding a fixing rib plate on the outer side of the joint; 3, measuring the size of the joint between the barrel and the large inclined tube, and forming an angle alpha for counteracting the distortion allowance; 4, welding a lower welding line; 5, welding a middle lower welding line, measuring an included angle beta with a total station electronic tacheometer, and controlling the included angle beta at 180 degrees in the welding process; 6, welding a middle upper welding line, measuring an included angle beta, and controlling the included angle beta at 180 degrees in the welding process; and 7, welding an upper welding line. In the invention, the total station electronic tacheometer is used together with a rigid fixing method, and the welding deformation of the joint is controlled in the welding process of the inserted large inclined tube and the barrel, so that the product qualified rate is high, and the welding quality is effectively ensured; and the method is simple, and is very effective for controlling the welding deformation of a large inserted joint.

The invention relates to a technique for making a circular ring box type beam of an aerogenerator set lifting tool, in particular to a technique for processing a circular ring box type beam of a lifting tool. The circular ring box type beam is divided into two semicircular ring box type beams, and each semicircular ring box type beam comprises two web plates, an internal partition plate, an upper wing plate, a lower wing plate and a seam-butting plate. The semicircular ring box type beam is processed by the steps of assembling and welding the two web plates, the internal partition plate, the upper wing plate, the lower wing plate and the seam-butting plate, and the like. The invention simply and effectively controls the welding deformation, reduces the machining cost and the work load for assembly welding on site and completes the assembly welding task with high efficiency and quality.

The invention discloses an assembly welding process of a muffle pipe double-layer flange. The strict assembly welding process of an upper flange, a lower flange, a rib plate, a cooling semi-pipe and a muffle pipe tube body is adopted, the welding deformation control key point is fully considered, the form and location tolerance requirements between the muffle pipe and the flanges as well as between the flanges are ensured, the assembly error and the welding deformation of the muffle pipe double-layer flange structure are effectively controlled, the design requirement is reached, and the precision requirement of the muffle pipe is perfectly improved.