A device for wiredraw or stretch the metals, ferrous and non-ferrous (wires, bars, tubes) with a wear almost - zero filieres and a total of the adherence of the state of the surface of all the products produced

摘要

Apparatus for drawing (non)ferrous metals in the form of a wire, a rod, a tube, or a non-cylindrical shape comprises a threaded tube (1) screwed into a threaded sleeve (2), which, in turn, is inserted into a large rectangular block (3) welded on casting plates. An aperture (5) supplies high pressure, high viscosity lubricant to the object (18) being drawn. The threaded tube (1) has significant thickness, Rockwell hardness (HRC) 58, and Vickers hardness (HV) 3500. The cone section of the threaded tube (1) conforms perfectly to the angle of the die (11). The two contact surfaces (8) of the threaded tube (1) have a mirror-finish with surface roughness (Ra) of 5/100 microns. The working dies comprise micro-grains of tungsten carbide compacted by hot isostatic pressing. The dies can comprise industrial ceramics selected from nitrides, carbides or borides having very high hardness of above 1200 HV. The threaded tube (1) and non-threaded (floating) tubes used in subsequent passes through the die, and set into position by the operator, are cylindrical or conical at an angle of 0-12 degrees. The metal drawing lubricants are greases or oils of viscosity of 200-1000 centistokes, with or without the following additives: graphite, molybdenum disulfide, metallic powders, stearate powders, and metallic alloy powders, or liquid or powder polymers.