1781 results about "Weld strength" patented technology

The invention discloses an oscillatory scanning laser beam-electric arc hybrid welding method and system. Laser beams and electric arc move together along an abutted seam in large range space, simultaneously the laser beams surround acting points of the electric arc to perform oscillatory scanning movement in a local small area, and an actual welding track is a curve formed by overlying two types of movements. As for an optimal range of laser beam oscillatory scanning displacement, the range in the direction of an X axis is minus 2mm to 3mm, the range in the direction of an Y axis is minus 5mm to 5mm, the range in the direction of a Z axis is minus 2mm to 2mm, and the oscillation frequency is in a range from 20Hz to 500Hz. According to the method and the system, an enhanced technical effect is achieved by the aid of interaction of a laser beam oscillatory scanning effect and a laser-electric arc synergistic effect, and the welding quality is improved. Compared with existing laser-electric arc hybrid welding and laser scanning welding methods and systems, the method and the system have the advantages that higher weld porosity inhibiting capability is achieved, and the weld strength is improved by 10% to 50%.

A process for laser welding together a laser beam transparent polyester article and a laser beam opaque polyester article. The method limits the use of a laser beam at an energy level not greater than 100 W at a scanning speed not greater than 1000 cm/min., thus causing the articles to be welded together and maintaining a high weld strength.

Laser tissue welding can be achieved using tunable Cr⁴⁺ lasers, semiconductor lasers and fiber lasers, where the weld strength follows the absorption spectrum of water. The use of gelatin and esterified gelatin as solders in conjunction with laser inducted tissue welding impart much stronger tensile and torque strengths than albumin solders. Selected NIR wavelength from the above lasers can improve welding and avoid thermal injury to tissue when used alone or with gelatin and esterified gelatin solders. These discoveries can be used to enhance laser tissue welding of tissues such as skin, mucous, bone, blood vessel, nerve, brain, liver, pancreas, spleen, kidney, lung, bronchus, respiratory track, urinary tract, gastrointestinal tract, or gynecologic tract and as a sealant for pulmonary air leaks and fistulas such as intestinal, rectal and urinary fistulas.

A method for manufacturing a spark plug which reduces the generation of spatters and the possibility of insufficient weld strength resulting from penetration depth insufficiency of a weld metal portion is disclosed. In accordance with the method, a chip joint face formation portion of a center electrode is formed from a heat-resistant alloy predominantly containing Fe or Ni. A noble metal chip is attached to a chip joint face of the chip joint face formation portion to thereby form a chip-attached assembly. A full-circled laser-beam weld metal portion is formed on the chip-attached assembly in such a manner as to intrude into the noble metal chip and into the chip joint face formation portion. A graded-index-type fiber optic cable is used as an optical transmission path extending between a laser beam generator and an optical emission section. A laser beam which is transmitted from the laser beam generator through the cable irradiates the chip-attached assembly while being condensed.

To provide a steel-aluminum welded material and a spot welding method therefor having high weld strength. The steel-aluminum welded material 3 includes a steel material 1 and an aluminum material 2 having predetermined widths. The area of a nugget 5 of a spot-welded part is determined as a function of the thickness of the aluminum material 2, and the area of a part of the nugget 5 corresponding to a part having a thickness in a range between 0.5 and 10 μm of an interface reaction layer 6 is defined as a function of the thickness of the aluminum material 2.

The invention provides a high-weld-strength Al-Mg-Si alloy which comprises the following components in percentage by weight: 0.5-0.9% of Si, 0.4-0.7% of Mg, less than 0.5% of Mn, less than 0.3% of Cr, 0.12-0.5% of (Mn+Cr), less than 0.35% of Fe, less than 0.2% of Zn, less than 0.1% of Ti and 0.2-0.5% of Cu. In addition, the alloy further comprises one of more of 0.2-0.8% of Er, 0.2-0.6% of Zr and 0.3-1.2% of Sc, less than or equal to 0.15% of the balance of other components of the alloy and the balance of Al. Meanwhile, the invention further provides a method for preparing an alloy section bar. According to the Al-Mg-Si alloy provided by the invention, the weld strength is remarkably improved, and the alloy section bar preparation method provided by the invention is further simpler in process.

This disclosure in certain embodiments relates to thermoplastic sheet compositions and applications incorporating such materials. More specifically this disclosure addresses thermoplastic sheets comprising: a) from 5 to 98.5 wt % of an essentially uncross-linked, random ethylene copolymer having from 20 wt % to 90 wt % repeat units from ethylene and from 10 wt % to 80 wt % of repeat units from one or more other ethylenically unsaturated monomers based upon the weight of the random ethylene copolymer; b) from 0.3 to 83.5 wt % of a polypropylene-based thermoplastic; and c) from 0.3 to 24.5 wt % of a vulcanized rubber dispersed phase. The disclosure also relates to methods of making the sheet compositions. One method includes incorporating a thermoplastic vulcanizate to provide the c) vulcanized rubber and in come cases, to supplement the b) polypropylene thermoplastic. Another method relates to melt blending polymer blends in appropriate proportions in the presence of a curing agent to effect dynamic vulcanization of a cross-linkable rubber component. Improved welding characteristics and weld strength of the sheets and reduced blocking in the extrusion step of producing the sheets is achieved.

The invention relates to a seamless flux-cored aluminum welding wire, which consists of a sheath and a core part, is conducive to adding an additive conveniently, quantificationally and efficiently during aluminum welding process and does not result in absorption of moisture, slag inclusion and scattering of core active substrates when removing an oxide film. The seamless flux-cored aluminum welding wire has the advantages of convenient application, high welding efficiency, no subsequent cleaning, environmental protection, etc. when being applied to soldering. The seamless flux-cored aluminum welding wire has high welding wire deposition efficiency and large deposition efficiency, while being applied to argon-arc welding and compared with solid core welding of the same specification, weld width is comparatively wide, penetration is increased, shape factor and weld reinforcement are reduced and the weld strength is 15 percent higher. Compared with flux-cored aluminum welding wire made of bite straps, the invention is characterized by less air holes and slag inclusion and high welding reliability.

The invention provides a battery cap welding machine, comprising: a frame, on which are provided a pole piece device, a tab correction device, a cap rotation device, a welding telescopic device, a tensile testing device, and a cap cap tab shaping device, The cap rotating device and the welding telescopic device are arranged oppositely, the pole piece device is set at one end of the cap rotating device, the tab correction device is set at the end of the welding telescopic device close to the pole piece device, and the tensile test device is set at the other end of the welding telescopic device , the gland cap lug shaping device is set parallel to the tensile testing device. The electrode piece device pulls up the pole piece on the cap, and the tab correction device rotates the tab on the battery case to align with the pole piece. The battery case and the cap are placed on the welding telescopic device and the cap rotating device to align and weld, and the welded battery is in the The tensile test device is used to test the welding strength, and the tab cap tab shaping device is used to complete the shaping of the tab and the compression of the cap, realizing automatic welding and greatly improving production efficiency.

The invention relates to a laser welding method for a thin stainless steel composite plate. According to the structural characteristics of the thin stainless steel composite plate, the outside of carbon steel is wrapped with a stainless steel plate, the stainless steel plate is thin, large-area and elastic, and great difficulty in double-sided welding is caused. By the aid of the laser welding method, the thin stainless steel plate is firstly pretreated and smoothly mounted, welding powder is prepared, argon shield is realized, the feeding quantity of the welding powder and the strength of a laser beam are controlled by means of computer program, and welding of the thin stainless steel composite plate is made possible. The welding method is advanced in process, high in welding quality, fine in corrosion resistance and high in welding strength, provides full and accurate data, and is safe, stable and reliable. The average tensile strength of a welding joint reaches 450.9MPa and accounts for 98.2% of that of base metal, the welding blank of the thin stainless steel composite plate is filled, and the laser welding method for the thin stainless steel composite plate is quite ideal.

The invention discloses an automobile shock absorber support frame projection welding floating tool, which relates to spot welding equipment and consists of a projection welding floating universal base, a replaceable automobile shock absorber support positioning frame, a replaceable positioning frame positioning mechanism, a wedge-shaped pressing mechanism, an upper electrode seat and a lower electrode seat, wherein the replaceable automobile shock absorber support positioning frame is arranged on the projection welding floating universal base through the replaceable positioning frame positioning mechanism and the wedge-shaped pressing mechanism, the projection welding floating universal base is arranged on a casing of a projection welder, the upper electrode seat is arranged under an upper electrode plate of the projection welder, and a lower electrode is arranged on a lower electrode plate of the projection welder. A spring is used for buffering in welding contact moment, thus the tool is stable and reliable, the salient point plastic deformation can not be caused, the salient point size is prevented from being changed by the upper electrode cylinder impact, and the welding strength stability is good.

The present invention relates to a polyamide resin composition and molded body molded with the same. The polyamide resin composition can mold the polyamide resin molded body excellent in weld strength and luminance, having rigidity. The polyamide resin composition is characterized that 100 parts by mass of polyamide resin (A), 1-10 parts by mass of swelling sheet silicates (B), and a polyamide resin composition which is a polyamide resin composition containing 0.5-5 parts by mass of metallic pigment (C), and is characterized by polyamide resin (A) comprising 2 or more type of aminocarboxylic acid units.

The invention discloses a laser welding method for butting two pieces of metal sheets, comprising the following steps: determining the size of facula according to the metal sheets; selecting a corresponding laser welding device and determining welding height according to the size of the facula; closely arranging a first welding guide plate at the initiating end of an abutment joint of the two pieces of metal sheets and arranging a second welding guide plate at the tail end of the abutment joint; with certain welding frequency, single welding energy and certain welding movement speed, carrying out movement and laser release from the first welding position of the first welding guide plate to the second welding position of the second welding guide plate along the abutment joint. The method of the invention ensures the same welding strength at the initial end and other positions of the welding lines, improves welding quality and increases welding strength. The welding lines welded by the method of the invention maintain the same strength property as the parent metal after a plurality times of distortion and tearing, thus having no weak spots in terms of strength.

The invention discloses a valve seat assembly of an electronic expansion valve. The valve seat assembly of the electronic expansion valve is characterized by comprising a valve seat and a second connecting pipe, wherein the valve seat is provided with a valve cavity, the second connecting pipe is fixedly connected with the side wall of the valve seat, the first central axis of the second connecting pipe is perpendicular to the second central axis of the valve seat, and the edge face of the second connecting pipe does not exceed the inner circumferential face of the valve cavity in any section where the first central axis is located. The invention further provides a manufacturing method of the valve seat assembly of the electronic expansion valve. According to the valve seat assembly of the electronic expansion valve, it is ensured that the end of the second connecting pipe cannot extend into the valve cavity or damage the integrality of the valve cavity, the noise caused by irregular shape of the valve cavity when a refrigerant flows can be lowered, moreover, the matching length of the connecting pipe and the valve seat can be fully ensured, welding strength is improved, and the uniformity of the assembly size of the connecting pipe can be ensured.

The invention relates to a laser welding tractable polycarbonate composition and a preparation method thereof. The composition comprises the following components in parts by weight: 50-80 parts of polycarbonate (PC) resin, 15-40 parts of ABS resin, 5-10 parts of amelt reinforcing agent, 0.1-1 part of a near infrared laser absorbent, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricant. The preparation method of the alloy comprises the following steps: (a) mixing the PC resin, the ABS resin, the melt reinforcing agent, the near infrared laser absorbent, the antioxidant and the lubricant in a mixing agitator; and (b) performing blending granulation on the mixture obtained in the step (a) by virtue of a twin-screw extruder to obtain a product. Compared with the prior art, the polycarbonate composition provided by the invention is higher in melt strength after the melt reinforcing agent is added, so that the surface of a product after welding has no bulges orbreakdowns, welding can be performed under a higher laser intensity, the obtained product is higher in welding strength at the same time, a processing window of a laser welding process of the polycarbonate composition is broadened, and the laser welding tractable polycarbonate composition is obtained.

A resin composition comprises 1 to 60 parts by weight of a wollastonite fiber (in which the number-average fiber length is 1 to 30 μm, the number-average fiber diameter is 0.1 to 10 μm, and the proportion of the number of a fiber having a fiber length of 5 to 25 μm relative to the total number of the fiber is 20 to 75%) and 0.1 to 20 parts by weight of an acid- or epoxy-modified olefinic resin having a melting point of 100 to 170° C., relative to 100 parts by weight of a thermoplastic resin (e.g., a polycarbonate-series resin). The weight-average molecular weight of the modified olefinic resin may be about 2.5×10⁴ to 30×10⁴. The resin composition may comprise a flame retardant. The combination use of the wollastonite fiber and the modified olefinic resin improves heat resistance, impact resistance and weld strength, even in the case of using a wollastonite fiber having a number-average fiber diameter of about 4 to 7 μm and an average aspect ratio of about 1.5 to 3. The present invention provides a thermoplastic resin composition for improving the impact resistance, weld strength and surface property without deteriorating the heat resistance.

The invention discloses an elastic body material for refrigerator sealing strips and preparation method thereof. The elastic body material for refrigerator sealing strips consists of hydrogenation styrene resin, rubber filling oil, polypropylene, mineral filler, weather resistant agent, compatibilizer and processing aids. The elastic body material for refrigerator sealing strips is manufactured by extrusion graining with counter-rotating twin-screw extruder after the raw material is mixed in high-speed mixer. Halogen material and o-benzene plasticizer which is harmful to human health will not be introduced in practical production process of the elastic body material for refrigerator sealing strips. The thermoplastic elastomer material produced in the invention has the advantages of light weight, high resilience, high welding strength, easy colorizing and good low-temperature resistance. There is no need for the treatment of high temperature sulfidation when extrusion moulding is operated with the above material. Decomposion of toxic gas and corrosion of production equipments will not happen during the process of extrusion moulding, and scraps can be recovered and re-used.

The invention discloses a method for manufacturing an aluminum-silicon clad layer hot forming steel tailor-welded blank through a laser filler wire welding process. The method comprises the steps of selecting object materials of the tailor-welded blank, selecting welding filling materials, adjusting welding process parameter and completing blank tailor welding and hot forming. According to the method, aiming at the thickness of a blank to be subjected to tailor welding, the ingredients of a base material and other characteristic parameters, welding wire ingredients are reasonably selected, thewelding process parameters are adjusted, the hot forming process is adjusted, and a weld metal microstructure matched with the strength requirement is improved and obtained. Compared with a traditional laser tailor-welded blank method (such as laser self-fusion welding), according to the method, the process step of removing an aluminum-plated silicon plate clad layer is not needed, the weld quality can be guaranteed, the steps of the technological process of the tailor-welded blank are simplified, and production efficiency is improved; and high equipment investment needed by removal of a cladlayer does not need to be additionally increased, and production cost is remarkably reduced. The method can be used for laser TIG filler wire welding and laser MIG hybrid welding processes, and has the beneficial effects of being capable of reducing the requirement for the precision of a sheet splicing clamp, improving the weld strength and the like.

To provide a material for laser welding, which is excellent in laser transmittance, as well as low warpage and enables a shaped article to be obtained with high weld strength and uniform weld strength by laser welding. This material for laser welding comprises a thermoplastic resin composition containing (A) a thermoplastic resin and (B) a glass fiber having a non-circular cross-section with the ratio between the long diameter and the short diameter in the cross-section at right angles to the length direction being from 1.2 to 10.

An armature manufacturing method of forming an armature including an arm holding a printing wire, and magnetic circuit forming members attached to the arm places the magnetic circuit forming members on the arm with a resistive layer of a resistive material having high electric resistance sandwiched between the arm and each of the magnetic circuit forming members, and welds together the arm and the magnetic circuit forming members with the resistive films sandwiched between the arm and the magnetic circuit forming members by spot welding. The arm and the magnetic circuit forming members of the armature can be joined together by welds having a high weld strength.

The application discloses a high flow non-spraying metallic silver polyamide composition and a preparation method thereof. The high flow non-spraying metallic silver polyamide composition is preparedfrom the following raw materials: PA6 resin, a metallic silver powder, a coupling agent, an internal lubricant, an external lubricant, an antioxidant, an ultraviolet light absorber, amino-silicone oil, a flame retardant, calcium stearate, MBS, SMA, silicon dioxide, a magnesium salt whisker, hollow glass-beads, EBS, glass fiber, a compatilizer and ABS; the composition has good flowability; injection molding parts are easy to be welded at welding lines; meanwhile, by adding the coupling agent, the welding strength is better, and the appearance of the weld lines is ensured; the composition has high flow characteristic and solves the problem of obvious welding lines of a product. The composition nylon resin has better compatibility with metal powder particles and ensures the welding strength of the welding lines of the product; the composition has non-spraying properties and replaces an electroplating or vacuum plating metal mode, so that the cost is significantly reduced and environment friendliness is achieved.

The invention relates to a portable underwater dry-type welding device, which comprises an electric welding machine, an air compressor, and a welding handle and a common welding rod under water. The portable underwater dry-type welding device is characterized in that the welding device comprises a welding cover, a seal gasket arranged at the mouth of the welding cover, an air inlet device arranged on the surface of the cover housing, and a welding rod entrance; the air compressor is connected with the air inlet device; and the welding device can generate a local dry welding space under water by draining water through air or other protection gas to weld a welding seam having a welding strength similar to that on the ground. The device can implement underwater welding by using common ground welding rod, and divers and workers on the ground can view the arc burning process clearly in the welding process. The welding can be carried out while the welding cover is moved when the welding region is kept dry. The device can be used for muddy water environment or underwater environment with low visibility.

The invention relates to the field of welding materials, in particular to a novel high-scandium aluminum alloy welding wire. The novel high-scandium aluminum alloy welding wire chemically comprises, by mass, 4.5-6.0% of Mg, 0.10-0.20% of Mn, 0.20-0.30% of Ti, 0.30-0.50% of Zn, 0.10-0.20% of Cr, 0.25-0.35% of Zr, 1.20-1.60% of Sc, not more than 0.20% of Fe, not more than 0.20% of Si, not more than 0.05% of Cu, not more than 0.0005% of Be, not more than 0.1% of other single impurity elements, not more than 0.15% of other impurity elements and the balance Al. The novel high-scandium aluminum alloy welding wire has the advantages of uniformity in texture, tiny grains, good electrical conductivity, excellent welding performance, high weld strength, good ductility and toughness, excellent mechanical property, low hot-cracking susceptibility and excellent corrosion resistance.