Forming machining in which the workpiece is drawn through a tapered shape with a center that reduces and transforms the cross sectional area. Beskrivning The process The work piece [1] in the form of a tube blank is cleaned and coated with a lubricant before processing. One end which is chamfered is inserted through the form [2] and by a pulling force, the entire tube through the mold and reduces and changes the tube cross sectional area [3]. A fixed core [Top image] or a liquid core [Bottom image] control the internal cross section. Ordinarily a reduction of cross-sectional area of about 50% is achieved. Tube drawing Process films Advantages and disadvantages In comparison with alternative methods Good inner surface finish Good outer surface finish All kinds of pipe shapes can be created Often requires more than one step to create the final product Limited tube length
