Iron Tube: Butt-Welded by Drawing Through Dies on a Draw Bench (Whitehouse, 1825)

Cornelius Whitehouse's way of making welded iron tubes, the basis of butt-weld pipe ever since: a strip of flat iron is turned up into a tube with its edges meeting, heated nearly to fusion in a hollow fire, and pulled by the chain of a draw bench through a pair of dies, which press the hot edges together and weld them. The tube is welded in two halves, one end at a time. Whitehouse made tubes 2 to 8 ft long in one piece, smooth inside and out. Unknown: plate thickness, width and tube sizes. The source does not give them. Source: Whitehouse's specification of 1825, quoted in C. D. Terry, Butt Weld Pipe (1907). Picture: Terry's Figs. 4 and 5.

متقدم

Unknown

التعليمات

Turn the plate over

Take a piece of flat iron (plough-plate iron) of a thickness and width to suit the intended bore. Bend up its sides ('turn it over') until the edges meet, or nearly so, and it forms a long tube. Ours: hammer and anvil for the bending.

المواد لهذه الخطوة:

قضبان حديد مطاوع1 flat plough-plate iron

أبعاد غير معروفة1 قطعة

الأدوات المطلوبة:

مطرقة حدادة

سندان مسطّح

Heat in the hollow fire

Put the tube into a hollow fire, urged by a blast, and heat it until the iron is on the point of fusion. Ours: a smith's forge as the hollow fire.

الأدوات المطلوبة:

كور الحدّاد

كلّابة حدادة

Draw it through the dies

Clamp the end of the tube to the chain of the draw bench, driven by a hand winch or an engine. Draw it out of the fire through a pair of dies of the size wanted, set in a screw press and closed to their bearing, so that the hot edges are pressed together and welded. A pair of pinchers with a conical hole, held against a standard, may be used instead of the press and dies.

الأدوات المطلوبة: