The invention provides a big vertical masonry joint hidden
arc welding tube fast production method belonging to the
processing and forming fields of
metal plate and relating to the bending
processing and forming technology of
metal plate which is mainly used for the fast production of the big vertical masonry joint hidden
arc welding tube. The invention adopts continuous array rollers of a coil stock to form,
high frequency prewelding on line, then utilizing a off-line automatic
submerged arc welding to carry out the inner
welding and outer
welding of the welded
pipe as well as expanding,
water pressure and nondestructive examinations; thereby realizing the high efficiency production of the big vertical masonry joint hidden
arc welding tube products. The invention adopts a plate-coiling mode to supply materials,
cutting materials, shearing and
butt welding, utilizes milling edge to finish the online-
processing of a divided edge beside the plate, primary roller forming, fine roller forming,
high frequency prewelding after a rough material is continuously formed by the array rollers and sawing as well as baiting and the
steel tube rough material needed by a hidden arc
welding working procedure can be acquired through online dimension fixing and
cutting off; hidden arc inner welding and hidden arc outer welding, inner control examination, expending,
water pressure test, repairing ends by machinery are carried out on the steel rough material to exam to acquire a finished product. The technique has a reasonable design and has the advantages of good
steel tube forming quality and high production efficiency as adopting the array rollers to form and
high frequency prewelding; thereby ensuring the overall production efficiency of the technique and the welding line quality can also be ensured reliably.