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692results about "Shielding gas supply/evacuation devices" patented technology

Shielding gas flow controller for a welding apparatus

ActiveCN101855039ASolving the same problem of controllingOvercoming Pressure Drop Related IssuesShielding gas supply/evacuation devicesFlow control using electric meansProcess engineeringElectric arc
A shielding gas flow controller (100) for an electric arc welding apparatus for insertion into a shielding gas supply line between a shielding gas source (200) and a shielding gas valve (800) of the electric arc welding apparatus, the flow controller having a shielding gas (200) input and a shielding gas output (600), a controllable gas valve (110) connected between the shielding gas in- and outputs and having a control input (170), and a controller means having a first input (400) for receiving a welding signal representing an electrical welding arc current (900) of the welding apparatus during a welding operation and a gas flow setting control (300) means adapted to generate a flow setting output being function of the welding signal and representing a desired shielding gas flow. The shielding gas flow controller further comprises an input pressure sensor (120) connected to the shielding gas input and arranged to provide a shielding gas input pressure measurement (150) to a second controller means input, and an output pressure sensor (140) connected to the shielding gas output and arranged to provide a shielding gas output pressure measurement to a third controller means input (160), and a flow setting output modifying means adapted to modify the flow setting output of the gas flow setting control means based on the shielding gas input and output pressure measurements, the welding signal, and a charateristic of the controllable valve into a control signal (170) for input to the control input of the controllable gas valve so as to maintain during the welding operation a substantially constant shielding gas flow in the shielding gas supply line to the welding apparatus corresponding to the flow setting output substantially independent of actual shielding gas input and output pressures at the shielding gas in- and outputs, respectively.
Owner:ALEXANDER BINZEL SCHWEISSTECHN GMBH & CO

Method for additive manufacturing of high-entropy alloy part through metal wires

InactiveCN108393558ARealize the integration of 3D rapid prototypingAvoid wastingShielding gas supply/evacuation devicesNumerical controlHigh entropy alloys
The invention discloses a method for additive manufacturing of a high-entropy alloy part through metal wires. The method comprises the specific steps that (1) a three-dimensional module of the to-be-manufactured high-entropy alloy part is established on a computer, and a processing route program is established according to the three-dimensional module; (2) the metal wires of different types required by the to-be-manufactured high-entropy alloy part are combined into a wire rope which is fed into a wire feeding device or a multiple-channel wire feeding device, the wire feeding speed, heat source energy, the scanning speed and protection gas flow are set, and additive manufacturing is conducted through special additive manufacturing equipment or a robot or a numerical control machine tool ormanual work at protective atmosphere or under protection of submerged-arc welding flux; and (3) the high-entropy alloy part is obtained through subsequent treatment of machining, heat treatment, surface treatment and the like on a part blank obtained through additive manufacturing. The method disclosed by the invention is simple and easy to conduct, low in cost and suitable for industrial production of the high-entropy alloy part.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Welding structure for inner container longitudinal seam of stainless steel gas cylinder and welding method

The invention discloses a welding structure for an inner container longitudinal seam of a stainless steel gas cylinder and a welding method. The welding structure comprises a strip-shaped auxiliary board, wherein a main gas guide hole and a gas guide groove are formed in the strip-shaped auxiliary boar in the length direction; the main gas guide hole and the gas guide groove are arranged in parallel; a plurality of gas guide small holes are formed between the main gas guide hole and the gas guide groove; the two ends of the gas guide small holes are respectively communicated with the main gas guide hole and the gas guide groove; and the cross section of the gas guide groove and the cross section of the longitudinal seam to be welded are positioned in the same plane. The welding method comprises the following steps: rolling round; carrying out butt welding and spot welding; carrying out spot welding on run-on plates and run-off plates; clamping; and welding. According to the invention, an MIG automatic welding process is adopted, so that the primary input-cost of welding equipment is low; in a later using process, the input using and maintenance costs are relatively low and the working efficiency is improved greatly. By adopting the process in the invention, the qualification rate of nondestructive testing reaches 99.4% or above in an actual longitudinal seam welding process of an insulated gas cylinder and a cylinder for an LNG vehicle; and physical and chemical test projects completely meet standard requirements.
Owner:ANHUI DAPAN SPECIAL EQUIP VEHICLE CO LTD

Butt joint circular seam reverse side gas shielding device for barrel fusion welding

Disclosed is a butt joint circular seam reverse side gas shielding device for barrel fusion welding. The butt joint circular seam reverse side gas shielding device for barrel fusion welding is characterized by comprising a welding jig and a gas shielding channel. The welding jig comprises a supporting ring (1), eight adjusting screw rods (2) and eight arc-shaped gas shielding grooves (3), wherein the radian of each arc-shaped gas shielding groove is equal to the inner diameter of a barrel. Air inflation holes (7) are formed in the sides of the gas shielding grooves (3), perforated plates (4) which assist in uniform diffusion of gas are added to the interior of the gas shielding grooves, and sealing grooves (8) are formed in the arc-shaped surfaces, making contact with the inner wall of the barrel, of the two sides of each gas shielding groove (3). The butt joint circular seam reverse side gas shielding device for barrel fusion welding has the advantages that the whole device is flexible in structure, adjustable, and easy and convenient to operate, and adapts to barrel circular seams with different diameters, the effect of gas shielding of a welding seam molten pool and a near weld zone is good, oval deformation of barrel welding can be reduced, the shielding gas is saved, and the time needed by gas replacement in the process of gas ventilation in advance is shortened.
Owner:云南昆船机械制造有限公司

Weld joint real-time protection cover during welding

The invention discloses a weld joint real-time protection cover during welding. The weld joint real-time protection cover comprises a protection cover outer shell, a smoke-dust baffle, a metal net, fire-prevention fibers and a support which is used for fixing the metal net and clamping the fire-prevention fibers. The protection cover outer shell is a rectangular box body provided with an opening at the bottom. The front end of the protection cover outer shell is provided with a bevel. The smoke-dust baffle is buckled on the front bevel of the protection cover outer shell. The top of the protection cover outer shell is provided with a first gas inlet pipe and a second gas inlet pipe. The first gas inlet pipe makes the second gas inlet pipe be close to the first gas inlet pipe. The support is installed in the protection cover outer shell. The fire-prevention fibers are clamped between the protection cover outer shell and the support. The upper portion of the support is provided with a folded sheet used for supporting the metal net. During wielding, the weld joint real-time protection cover synchronously moves along with a welding gun to cover a high-temperature weld joint after welding of the welding gun, so that the weld joint emerging from the rear end of the protection cover is cooled to be below the temperature at which the weld joint is subjected to oxidation reaction with air, and accordingly the problem of smoke-dust pollution frequently generated when a high-temperature weld joint area is oxidized or welded in the automatic welding process is effectively avoided.
Owner:XI AN JIAOTONG UNIV

Auxiliary protection gas hood of automatic TIC welder head

The invention relates to an auxiliary protection gas hood of an automatic TIC welder head, and belongs to the field of machining. The auxiliary protection gas hood aims to solve the problem that oxidation of metal welding occurs easily near a welding pool in the welding process due to a small protection range of a welding nozzle of a traditional welder. According to the auxiliary protection gas hood, argon enters the auxiliary protection gas hood through a gas-guide tube, the turbulence phenomenon of the argon is reduced through filtering of a first netted plate and a second netted plate, and the argon around a welding gun forms a stable auxiliary argon flow field, so that the area outside of the nozzle of the welding gun and inside of the auxiliary protection gas hood is in the effective protection range of the argon, a good protection effect is achieved at the two sides of the welding pool in the automatic welding process of the easily oxidized metal tungsten electrode argon arc, and oxidation of titanium alloy and other easily oxidized metal is avoided. In the welding process, the auxiliary protection gas hood of the automatic TIC welder head and the welding gun form a whole, and the auxiliary protection gas hood swings along with the welding gun. The auxiliary protection gas hood of the automatic TIC welder head is suitable for the welding of the titanium alloy and other easily oxidized metal.
Owner:HARBIN TURBINE +1

Internal/ external multi-protection narrow gap/ super-narrow gas welding nozzle

The invention relates to an internal / external multi-protection narrow gap / super-narrow gas welding nozzle which comprises a nozzle body with three gas inlet through holes, wherein one gas inlet through hole serves as a primary shielding gas channel, and the other two gas inlet through holes serve as secondary shielding gas channels parallel to the primary shielding gas channel in height. The internal / external multi-protection narrow gap / super-narrow gas welding nozzle further comprises pressure reduction and equalizing cavities and flow uniforming sieves, and the lower portions of the flow uniforming sieves are communicated with open gas outlet channels of a primary shielding gas area, a left secondary shielding gas area and a right secondary shielding gas area. The internal / external multi-protection narrow gap / super-narrow gas welding nozzle has the advantages that primary protection and secondary protection of filling welding passes in joints, sub-cosmetic welding passes and cosmetic welding passes can be met, protection welding of primary shielding gas and secondary shielding gas of the same gas and different gases can be met, bidirectional and unilateral backward pulling gas protection is achieved, and gas consumption is greatly reduced while welding quality is improved; the internal / external multi-protection narrow gap / super-narrow gas welding nozzle is made of ceramic materials, so that the internal / external multi-protection narrow gap / super-narrow gas welding nozzle is reliable in high-temperature insulation performance and long in service life.
Owner:HUBEI HONGLU STEEL STRUCTURE +1
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