The invention discloses a pipe fitting welding clamp suitable for a T-shaped structure The pipe fitting welding clamp comprises a base A containing groove is fixedly connected to the middle portion of the base Horizontal fastening mechanisms are fixedly connected to the two ends of the base Four stand columns are fixedly connected between the two horizontal fastening mechanisms through fastening nuts The stand columns are arranged on the two sides of the containing groove correspondingly A vertical fastening mechanism is mounted on the stand columns The clamp fixes horizontal pipe fittings and vertical pipe fittings through the horizontal fastening mechanisms and the vertical fastening mechanism arranged on the base correspondingly, the horizontal pipe fittings and the vertical pipe fittings can be effectively prevented from shifting or rotating, then welding precision is further guaranteed, and the quality of finished products is improved; and operation welding can be carried out only through one worker, the manual cost is greatly reduced, and the production efficiency is improved effectively

Pipe fitting welding clamp suitable for T-shaped structure

The invention discloses a prestressed pile tip anchor bar welding mould which is used for welding a prestressed pile tip anchor bar and a pile shoe and relates to the field of construction technologies. The prestressed pile tip anchor bar welding mould comprises a base (3), a bracket (11), a cross beam (12) and an anchor bar fixing device, wherein one end of the bracket (11) is fixedly connected with the base (3), the other end of the bracket (11) is fixedly connected with the cross beam (12); the cross beam (12) is connected with the anchor bar fixing device by virtue of a slide bar; and the base is provided with a pile shoe fixing mount (1). The prestressed pile tip anchor bar welding mould disclosed by the invention has the advantages that the pile shoe and the anchor bar can be conveniently welded by the pile shoe fixing mount and an anchor bar positioning rack, so that a prestressed pile tip rebar framework molded through welding is standard and unified, thereby saving manpower, improving the production efficiency, and greatly lowering the production cost.

Prestressed pile tip anchor bar welding mould

The invention provides a steel bar welding technology. According to the steel bar welding technology, a welding fixture, a pressurizer, a heater and a gas supply device are used. Before welding, the end faces of two steel bars to be welded are cut to be level and perpendicular to axes of the steel bars, and the cut surfaces are polished and trimmed by a polisher. The steel bar welding technology specifically includes the steps of by the welding fixture, clamping the steel bars to be welded to be mounted and positioned vertically, horizontally or obliquely and applying axial pressure on the steel bars; enabling the axes of the two steel bars to be positioned on the same straight line, enabling the head and tail end faces of the two steel bars to be opposite to each other completely, and pressurizing to butt against the steel bars tightly after mounting so as to enable a seam gap between the end faces of the two steel bars to be smaller than 1mm; applying axial pressure of 50-60N/mm on the steel bars by the welding fixture, wherein pressure welding time is about 100 seconds. The steel bar welding technology has the advantages that the steel bar welding quality and welding firmness are high, burrs at the welding positions are fewer, and requirements of a seam welder on the steel bars can be met.

Steel bar welding technology

The invention discloses for a welding fixture and localization method of X-band space travelling wave tube radio frequency system, including base and the support pallet on the base, location-plate on the support pallet, the locating slot of the slow wave part of positioning radio frequency system on the location-plate; the pressing plate tightly pressed on the slow wave part and support of radio frequency system on the location-plate; positioning seat on top of the suppor pallet. The positioning seat is provided with the locating rod of the delivery of energy window for adjusting the positioning radio frequency system, and locating rod is fixed on positioning seat by hold-down mechanism; For the welding positioning method of X-band space travelling wave tube radio frequency system, realized using the welding tooling of X-band space travelling wave tube radio frequency system. The present invention can ensure the perpendicularity of slow wave system and power transmitting window, to ensure welding quality of welding and the functional reliability of space travelling wave tube.

Welding Fixture and Localization Method of X-band Space Travelling Wave Tube Radio Frequency System

The invention discloses a detachable column rebar electroslag pressure welding positioning device. The device comprises a supporting frame. The shape of the supporting frame is similar to the outer shape of a poured column, and the supporting frame and the poured column are mounted in a matched mode. The outer side of the supporting frame is of a rectangular structure. A rebar clamping mechanism is arranged on each of the sides of the exterior of the supporting frame and comprises a connecting rod. Clamps are arranged at the upper and lower ends of the connecting rods correspondingly and located in the space above the poured column. The clamps at the upper and lower ends of the connecting rods are used for clamping and fixing to-be-connected rebars and poured rebars, accordingly, the to-be-connected rebars and the poured rebars are welded and fixed, and the technical problem that the efficiency is low and positioning is imprecise in the prior art are solved.

Detachable column rebar electroslag pressure welding positioning device

The utility model relates to a clamp for gas pressure welding of reinforcing bar whose body is a rectangle, belonging to a welding tool. In the clamping chuck of the clamp for gas pressure welding of reinforcing bar, a pressure plate is connected by an adjusting threaded rod and adjusting nuts; the butt welding steel bar is clamped by a compression threaded rod and compression nuts. The utility model has the advantages that the welding quality is improved because the concentricity of the steel bar is guaranteed; the welding efficiency is improved because of the fast speed of the loading and unloading of the steel bar; the steel bar with different diameters can be welded depending on the action of the adjusting nuts and the adjusting threaded rod.

Xijing Li

Papers

Clamp for gas pressure welding of reinforcing bar