On-line advanced straight edge case forming process
The straight edge case forming can restrict the plate edges to a smooth ,natural moving track.and the quality of formed pipe is improved,the edges are well controlled,and pipes have highly accurate dimensions and better surface quality, and retain the mechanical properties of raw material are primely retained
On-line weld seam annealing
ERW 610 production line is equipped with advanced high frequency solid state welding technology and machine, this machine can switch between high frequency and medium frequency,the induction coil to work under gas protection the weld seam is high qualified and smooth, the pipe can obtain high strength , the mechanical property of weld seam is almost same with the parent metal
On line SXF J610 digital rotatory cutting machine
The most advantaged homemade digital flying cutting machine, this machine is equipped with high accuracy, fast microcoputer system,can accurately fix the length,get perfect cross sections, without flash .End facing and beveling machines also ensure the pipe and quality.
6500 tons molding machine
Computer automatic control, according to the steel grade, wall thickness, plate width automatically adjust the reduction, reduction force and steel plate feed, the upper and lower grinding tools have automatic deformation compensation function,Using the stepping JCO forming method, half of the pre-bent steel plate is gradually bent from the edge to the middle of the plate on the forming machine with the set step length and number of times, and then the other half of the steel plate is also bent to form an open "O" shaped steel pipe.
Imported full-pipe length mechanical expanding machine controlled automatically by computer. The entire length of the welded pipe is clamped and expanded, and the expanding head expands without gaps, so that the mechanical properties and straightness of the expanded welded pipe are more uniform. While eliminating the forming stress and welding stress, the tolerance of diameter, roundness and straightness meets customer requirements.
Six wire external welding machine
It is composed of American Lincoln digital welding machine, automatic welding seam laser tracking system, flux conveying and recycling system, television monitoring system and digital control system. The workpiece is moved by the trolley and the welding head is fixed for welding. The digital welding machine realizes that the welding characteristic curve can be adjusted as required, and the welding coefficient is automatically recorded and stored and traceable.
It has the functions of automatic centering of steel plate and automatic copying and floating of milling edges. The milling speed and milling amount are automatically set according to the steel grade, wall thickness, groove shape and size. The computer automatically controls both sides of the steel plate to mill the required plate width and edge flatness, and the groove required for welding.
Automatic ultrasonic welding seam flaw detection equipment
The automatic digital ultrasonic flaw detection system can save the flaw detection curve record of each welded pipe. The laser automatic tracking system is adopted to ensure the quality of flaw detection. Set up a set of equipment before and after the expansion and hydraulic test to ensure product quality.
Spiral forming unit weld seam flaw detection equipment
The conveyed steel strip is bent into a steel tube using the principle of three-roll forming. The external control roller of the shaper forces the formed steel tube to maintain the shape and roundness, and the welding of the forming seam is stable. The forming angle is 40°-75°, and the maximum pitch is 2300mm.
Hydraulic testing machine
It is used to carry out hydrostatic pressure test on welded pipe to check whether the welded pipe has leakage defects under specified pressure, so as to ensure the performance of welded pipe. The maximum allowable working load capacity of the computer-controlled hydraulic testing machine: 3000 tons, and its maximum test capacity: 30Mpa. The pressure value-stabilization time curve can be continuously recorded during the welded pipe hydraulic test process, and the hydraulic test record of each welded pipe can be saved curve.
Powder spraying device
A Venturi vacuum cleaner is used to suck the epoxy powder from the powder supply barrel into the powder delivery pipe, and then spray it from the spray gun. the powder sprayed by the spray gun is charged in a high-voltage electrostatic field and then absorbed and melted on the heated tube wall. The compressed air that has been condensed, dried and filtered is the flow and driving force of the powder coating in the high-voltage electrostatic coating process.
External shot blasting system
It adopts the advanced down-throwing type shot blasting device at home and abroad, and uses a large-volume, high-efficiency shot blasting device. The shot blasting chamber guard plate, blade, shot blasting device guard plate and sub-blasting wheel are made of high wear-resistant alloy cast iron materials. Rust removal grade: smoothness Sa 2.5 grade, roughness 50-90μm.