36results about How to "Welding quality is easy to guarantee" patented technology

The invention relates to the field of technologies for welding tubular piles, and particularly discloses a tubular pile welding production line which comprises welding devices. The tubular pile welding production line is characterized by further comprising a material translation manipulator for synchronously picking and shifting to-be-machined tubular piles; a tubular pile feeding rotary drum, a conveying lifting platform, a divisional straightening turntable, a flattening cabinet, a material turnover turntable, a welding positioning table, a discharging lifting table and a discharging rotary drum are sequentially arranged on a side of the material translation manipulator, the tubular piles can be upwardly hoisted by the conveying lifting table, required-to-be-welded connectors of the tubular piles can be correspondingly straightened by the divisional straightening turntable, the tubular piles can be flattened and welded by the flattening cabinet and can be turned over by the material turnover turntable, the turned tubular piles further can be welded by the welding positioning table, the welded tubular piles can be stacked by the discharging lifting table, the tubular piles can be delivered by the discharging rotary drum, and the welding devices are correspondingly arranged on a side of the flattening cabinet and a side of the welding positioning table. The tubular pile welding production line has the advantages that the tubular pile welding production line is simple and efficient in structural setting, tubular pile material welding working procedures are decomposed by the aid of the tubular pile welding production line, excessive manual participation basically can be omitted except for charging, the welding quality of products is easy to guarantee, and the production efficiency can be greatly enhanced.

The invention discloses a construction method for integrally lifting a large-span type steel beam pulling bar and particularly discloses a construction method for splicing and welding to manufacture a simple pulling bar in site by using a large-span type steel beam aiming at the characteristics of large span and complex modelling for integral lifting, aiming at overcoming the defects of wide required field, large-size mechanical equipment lifting and high cost of the traditional construction method. The invention provides a novel construction method for a project with a narrow field and a complex peripheral environment. When the construction of a large-span steel structure type steel beam is carried out by adopting the method, a profile steel beam is processed in segments as required in a factory, all segments are spliced and welded in site, therefore overhead working is prevented, welding quality is easy to ensure, site requirement for lifting by adopting multiple large-size mechanical equipment is prevented, project cost is reduced, and a construction period is shortened.

The invention discloses an integral flange automatic welding device with a central through hole. The welding cross arm is slidably connected to the base of the positioner, and can move forward and backward relative to the base; the welding chuck is connected to the main motor through the rotary support fixed on the turning frame; the turning frame has a central through hole, and the workpiece can pass through the center through the hole The welding chuck can hold any part of the workpiece, so that the positioner, welding power supply and welding torch can be integrated structure, not only suitable for long pipe welding, but also when there are multiple welds on the workpiece, no need Repeatedly changing the relative position of the welding cross arm and the positioner can complete the welding of all welds on the workpiece. The welding cross arm is equipped with a welding oscillator and an arc length regulator. The welding torch is installed on the arc length regulator, which can automatically realize the swing and up and down adjustment, and is suitable for weldments with groove requirements and workpieces with obvious ellipticity. Welding, without human adjustment or intervention, realizes closed-loop control, and the welding quality is easy to guarantee.

The invention relates to a tank top installing and welding process of a single-coating double-wall low temperature storage tank, which is characterized by comprising the following steps of: (1) installing temporary buttresses on an outer tank base plate and on an outer tank wall, installing and welding pressure bearing rods on the temporary buttresses, and building a full scaffold in the outer tank of the low temperature storage tank; (2) welding a net rack on the outer tank top; (3) welding top plate: welding each top plate on the net rack; (4) installing each suspension rod on each corresponding H-shaped steel, and removing the internal full scaffold; (5) installing and welding an inner tank suspended ceiling on the outer tank base plate; (6) lifting the welded inner tank suspended ceiling by using a leading chain, and connecting with each suspension rod; and (7) welding compression resisting rings: installing and welding the compression resisting rings at the junctions of the pressure bearing rods and the top plates of the outer tank top. Compared with the prior art, the process only requires building the full scaffold once and has the advantages of fewer temporary tooling quantity, low construction difficulty, simple construction procedures, capability of ensuring working safety, high construction quality and construction efficiency and low construction cost.

Provided is a Q500qE high-strength bridge steel corner joint welding method. Two sides of a rib plate are provided with partially penetrated two-sided symmetrical grooves, groove angles are 48 degrees, and then the rib plate is vertically assembled and positioned on a base plate; during welding, an ER60Q solid wire and a CO2 gas shielded welding technology are firstly adopted to weld passes transversely, synchronously and symmetrically, and the rib plate is vertically fixed to the base plate; then, an H60Q submerged arc welding wire, an SJ105q submerged arc welding agent and an automatic submerged arc welding process are adopted to perform sequential filling of two sides of a ship's position and cover surface welding, and the angle of the ship's position is 45 degrees. According to the welding method integrating transverse gas shielded welding and ship's position submerged arc welding, preheating is not needed before welding, deformation correction is not needed after welding, formed welded appearance is attractive, and weld joints are internally reliable in performance, stable in quality, small in welding deformation and high in production efficiency. The Q500qE high-strength bridge steel corner joint welding method is suitable for welding of high-strength large and thick bridge steel plate units.