35results about "Welding/soldering/cutting articles" patented technology

A laser processing apparatus including a laser beam branching mechanism provided between a laser oscillator and a focusing unit. The laser beam branching mechanism includes a spread angle adjusting unit for adjusting the spread angle of a laser beam and a branching unit for branching the laser beam into a plurality of laser beams. The branching unit includes a half-wave plate, a first polarization beam splitter for separating the laser beam into P polarized light and S polarized light, a first mirror for reflecting the P polarized light, a second mirror for reflecting the S polarized light, and a second polarization beam splitter for leading the P polarized light reflected by the first mirror and the S polarized light reflected by the second mirror to different optical paths extending in the same direction.

The invention relates to a car steel-aluminum splicing joint welding method. The car steel-aluminum splicing joint welding method is characterized by comprising the following steps that a first workpiece and a second workpiece required to be subject to splicing welding are provided; secondly, the first workpiece and the second workpiece are vertically spliced and clamped; thirdly, a laser cuttingsystem is provided; fourthly, a laser molten brazing welding system is provided, and a laser welding head, a wire feeding head and a laser cutting head in the laser molten brazing welding system are arranged in series and column in the welding direction; fifthly, the laser cutting system is started, and high-energy laser beams formed through focusing of the laser cutting head irradiate the surfaceof the first workpiece vertically; sixthly, the laser molten brazing welding system is started, the laser welding head and the wire feeding head are subject to molten brazing welding along the trackof the laser cutting head, and welding process is finished. The invention further discloses a car steel-aluminum splicing joint welding system. Compared with the prior art, the method and system havethe beneficial effects of being good in welding effect and simple in process.

The invention is suitable for the field of a laser welding process, and provides a method for welding a thick copper plate by a fiber laser. The method comprises the following steps of spraying a welding line of the thick copper plate with a light absorbing coating layer, and welding the welding line, which is sprayed with the light absorbing coating layer, of the thick copper plate by focused laser emitted from the fiber laser, wherein the coating of the light absorbing coating layer comprises light absorbing coating and water-based resin; the light absorbing coating consists of the following components in mass percent: 50-60 percent of ZnO submicron particulates, 20-25 percent of Al2O3 submicron particulates, 20-25 percent of TiO2 submicron particulates; the mass percent sum of all the components is 100 percent. By preinstalling a layer of self-developed light absorbing coating on the surface of the thick copper plate, the energy utilization rate when the thick copper plate is welded by the fiber laser is greatly increased, the welding penetration is increased, and the welding efficiency is increased; ceramic clinker of which the proportion is less than that of copper alloy covers the surface of a weld pool, and therefore the weld pool can be effectively prevented from being oxidized; without welding shield gas, the higher welding line quality can also be obtained.

A bonding apparatus including an ultrasonic horn having a capillary, a horn holder holding the ultrasonic horn, a swing arm rotatably supporting the horn holder on horn holder supporting shafts, and auxiliary arms which are rotatably supported by auxiliary arm supporting shafts and rotatably supported by connecting shafts on the horn holder. The horn holder supporting shafts are disposed above a hypothetical center of an imaginary horizontal line extending from the tip end of the capillary, the auxiliary arm supporting shafts are disposed in the back of the horn holder supporting shafts and at the same height as the horn holder supporting shafts, and the connecting shafts are disposed at an intersection of an extension of an imaginary line connecting the tip end of the capillary and the horn holder supporting shafts and an extension of an imaginary line connecting the hypothetical center and the auxiliary arm supporting shafts.

The invention provides a friction stir welding method of forming a weld portion having an excellent fatigue property in the case of welding a weld material by using a friction stir welding method. The invention provides a friction stir welding method structured such as to insert a tool provided in such a manner that a pin-shaped probe protrudes to an end surface of a columnar member to a weld material in a state of being rotated, and move the tool in a state of being rotated, thereby welding two or more weld materials in accordance with a friction stirring, in which a cavity portion is provided in a part of a weld portion of the weld material, a member is formed in the cavity portion, and the weld material is welded by the friction stirring. In accordance with the invention, since an unwelded portion is not formed near the cavity portion, a notch effect is reduced, and it is possible to form the weld member which is excellent in the fatigue property.

The invention relates to a flash welding method for dissimilar metal. According to the dissimilar metal, the mass of a portion to be melted through high-melting metal is less than that of a portion to be melted through low-melting metal, or the high-melting metal is preheated before welding, and the high-melting metal required heat for melting the portion is controlled to be reduced to be 0.8 to 1.2 times of the low-melting metal required heat for melting the portion. According to the flash welding method for the dissimilar metal which is welded through a flash welding technology, heat is uniformly distributed to the dissimilar metal to be welded when the flash welding is performed and the dissimilar metal achieves the melting temperature synchronously, good self-melting is achieved, solder is not needed, and meanwhile the welding quality is improved due to the facts that the mass of the portion to be melted through the high-melting metal is reduced and or the high-melting metal is performed preheating before welding.

To prevent poor quality of weld in a welding process for a thick material or for welding a gap, the laser welding apparatus has granular flux (3) supplied to a side of the base material (W) opposite to the side where a laser beam is directed and a pressing member (5) that presses the granular flux onto the base material (W) upon receiving fluid therein. Either the flux prevents the laser beam that coming through the base material (W) from penetrating the flux or the thickness of molten flux is selected so that the laser beam coming through the base material (W) does not penetrate the molten flux.

Disclosed herein is a laser processing apparatus including first and second laser mechanisms, a laser oscillator for oscillating an original laser beam, an optical system for branching the original laser beam into first and second laser beams, and first and second operation panels for respectively setting first and second processing conditions for the first and second laser mechanisms. The first and second laser mechanisms include first and second chuck tables for holding first and second workpieces, first and second X moving units for moving the first and second chuck tables in an X direction, first and second Y moving units for moving the first and second chuck tables in a Y direction perpendicular to the X direction, and first and second focusing units for focusing the first and second laser beams to the first and second workpieces held on the first and second chuck tables, respectively.

The invention relates to welding of glass materials in the technical field of laser processing, and particularly relates to a glass material ultrafast laser precision welding system and method. The glass material ultrafast laser precision welding system and the method solve the welding quality problem caused by the fact that the surfaces of glass cannot be precisely attached in the existing two-layer or multi-layer glass plate welding process, and the welding quality problem caused by stress distribution between two adjacent layers of glass is solved. The glass material ultrafast laser precision welding system comprises a clamping and preprocessing module, an optical module, a planar motion module and a vertical motion mechanism; the optical module comprises an ultrafast laser and a lightbeam modulation unit composed of a polarization splitting prism, a Faraday rotator, a reflection type light beam modulator and a telecentric micro-focusing lens; and the laser beams are precisely regulated and controlled through the light beam modulation unit, and integrated control over the welding strength and interlayer stress distribution of the double-layer or multi-layer glass plate is achieved. Meanwhile, and the invention further provides a welding method based on the glass material ultrafast laser precision welding system.

The invention relates to a welding wire for steel-copper dissimilar metal submerged-arc welding and a welding method of the welding wirearc, belonging to the field of submerged-arc welding. The welding wire comprises the following chemical components in percentage by weight: 0.05-0.15% of arcbon, 0.80-2.10% of manganese, 0.07-0.95% of silicon, 0-0.03% of sulphur, 0-0.03% of phosphorus, 0.20-0.35% of copper, 0-0.20% of chromium, 0-0.30% of nickel and the balance of iron; the welding method comprises the following steps that: before being welded, a copper plate and a steel plate are not preheated; the steel plate and the copper plate are fixed by using gas shield welding spot welding; steel-copper dissimilar metal submerged-arc welding wires are used for matching with SJ101 welding flux so as to carry out submerged-arc welding; when being welded, the welding wire deviates 4mm-8mm from the side of the copper plate; the welding current is 396-630A; the welding voltage is 35-40V; and the welding speed is 23-30m/h. The welding joint obtained by the welding method provided by the invention has the characteristics of good mechanical performance, high efficiency, beautiful appearance and little crack, etc.

A chuck table holding a frame unit including a workpiece is securely placed in an opening of an annular frame by a tape. A transparent holder having a holding surface holds the workpiece with the tape interposed therebetween. A frame body is erected around and surrounding the holder, the frame body having a plurality of suction holes that are open in an inner circumferential surface of the frame body. The frame body has an inside diameter equal to or smaller than an inside diameter of the annular frame. While an opening of the frame body is being covered by the tape, a suction force is transmitted through the suction holes into the frame body, discharging air from between the tape and the holding surface to bring the tape into intimate contact with the holding surface thereby securing the workpiece of the frame unit to the holding surface.

The present invention belongs to the field of additive manufacturing technology, and discloses a 4D printing method capable of in-situ regulating functional properties of nickel-titanium (NiTi) alloys and the application thereof. The method comprises the following steps: subjecting NiTi alloy bars to atomization milling to obtain NiTi alloy powder with a particle size of 15-53 μm, placing the NiTi alloy powder in a discharge plasma assisted ball mill for discharge treatment to promote the activation of powder activity, then adding nano-sized Ni powder with a particle size of 100-800 nm to obtain mixed powder, then continuing the discharge treatment to realize the metallurgical bonding between the NiTi alloy powder and the nano-sized Ni powder to obtain the modified powder, and finally using the additive manufacturing technology to prepare and form the modified powder into a functionalized NiTi alloy. The present invention achieves the metallurgical bonding between the nano-sized Ni powder and the large-sized spherical NiTi alloy powder by adding the nano-sized Ni powder in the process of discharge treatment, which is conducive to preparing a bulk alloy with uniform composition, structure and properties and the parts made therewith.

The present invention provides a solder composition comprising a flux, a solder alloy and silicon oil.

A method for providing a welded joint includes: providing a first metal sheet having a first melting point; providing a second metal sheet having a second melting point, the second melting point being lower than the first melting point; providing a weld material; and joining the first metal sheet and the second metal sheet together by means of the weld material, thus defining a first joining interface between the first metal sheet and the weld material and a second joining interface between the second metal sheet and the weld material. The joining includes heating the second metal sheet at the second joining interface to a temperature higher than the second melting point, but lower than the first melting point.

The invention relates to an assembling and welding method for a truss layer corner column, which comprises the following steps of: respectively welding box type forgings with box body end heads, and preheating welding positions before welding by adopting an electric heating method; a jig frame is erected according to the assembly inclination of the box type forge piece and the brackets and the requirements of a design drawing, the inclination of a plate, used for supporting the brackets, at the topmost end of the jig frame is kept consistent with the inclination of the brackets, and the first bracket on the upper portion, the fourth bracket on the lower portion and the protruding position of the forge piece are assembled; a second bracket and a third bracket are assembled with the other two faces of the box type forge piece; and annealing treatment is conducted on the box body end and the welding seam of the bracket and the box type forge piece. According to the assembling and welding method, the welding seams of the components are planned, the phenomenon that the welding seams are too concentrated is avoided, meanwhile, the webs connected with the bracket flange plates are changed into the permeable webs, the thickness is small, discontinuous connection is achieved, the welding amount of the bracket is reduced, and materials and the manufacturing cost are also saved.

The invention discloses a circuit board welding gun achieving automatic feeding. The circuit board welding gun structurally comprises an electric welding head, a wire wiping structure, a front end, abody, an automatic wire discharging device and a handle. The front end and the handle are mounted at the two horizontal ends of the body correspondingly. The automatic wire discharging device is mounted in the body. The electric welding head is mounted on the other side, opposite to the body, of the front end and cooperates with the wire wiping structure. A rotating shaft is sleeved with the circuit board welding gun through a tin wire barrel, after a motor is powered on to rotate, a tin wire is conveyed out from wire outlets of housings, the tin wire comes out from the electric welding head after being guided by the wire wiping structure, heating is achieved on the electric welding head together, and tin and heating are achieved together; and through the housings on the two sides of the wire outlet, one housing is warped outwards, the other end is in an outward semicircular shape, the two ends of each housing are smooth and free of burrs, tin wire discharging is smoother, and the problems that tin wires are broken due to mutual friction, and wires cannot be fed smoothly cannot happen.

The invention discloses an intermediate layer alloy applied to resistance spot-welding of tantalum Ta1 and Q235 and a preparation method thereof. The intermediate layer alloy is prepared from the components in percentage by atom: 5%-10% of Ta, 5%-10% of Fe, 20%-25% of Ni, 15%-23% of Cr, 15%-22% of Cu, 20%-25% of Co, and the total atom percentage of the components is 100%. A certain thickness of intermediate layer alloy foil is placed between Ta1 and Q235 sheets to be welded, resistance spot-welding is used for welding operation to enable the intermediate layer alloy and partial base metal aresubjected to heat fusing by interface resistance, and the high performance welding of Ta1/Q235 is realized. According to the method and the intermediate layer alloy thereof, the matching between tantalum and stainless steel during welding is good, a single phase Fcc solid solution structure is used as nugget, joint comprehensive mechanical properties are remarkably improved, and the preparation method of the intermediate layer alloy foil is simple in process and low in cost.