Drawing die at home and abroad to make comparison of inner hole

The optimal pass wire drawing die hole can reduce the wear of wire drawing die rate, prolong the service life of wire drawing die. Drawing die with the same specifications abroad than domestic, wire drawing die work region length is generally much longer. Because in the process of drawing wire first contact and the core inlet area, small angle inlet cone, not only increases the area of contact wire and hole, so that the friction force is increased, but also hinder the lubricant to the lubricant in drawing process, the effect of variation, the serious influence the service life of the die. The short bearing easily cause product size deviation, and the drawing die soon wear. A long narrow clearance work area can reduce the wire and drawing die, more can be forced under high pressure lubricant into the wire and the inner hole in the middle, resulting in better lubrication pressure. Out by the inner hole of the wire temperature is low, the drawing force, metal drawing process activities are average, is conducive to the drawing speed of progress and improve the surface quality of wire rod.
Curve comparison wear from Germany and China Xiangtan Iron and steel production drawing die wire drawing die, two kinds of wire drawing die drawing work in the premise of the same: the workpiece material: No. 65 steel wire; drawing speed: 3.64M / S; drawing lubricant: soap powder; coating before drawing surface: sulfuric acid pickling, phosphating, coating of borax. While imports of foreign products of the drawing die angle increases, effectively avoiding the abrasion of wire and wire drawing die, and into more lubricant, enhance the lubricating effect, reduce die wear. Therefore, pass optimization of drawing die wire drawing die, precision manufacturing progress, can save production costs, greatly improve the production efficiency, is of great significance to the development of wire rod industry industry in china. This change improved surface quality of wire drawing die, and the service life of the progress.
At home and abroad drawing die hole shape compared with foreign products, domestic wire drawing die blank below: 1. Import significantly less than the small angle. German production drawing die service life is 2.72 times higher than the Xiangtan Iron and steel production of wire drawing die service life. The sizing area is not significant. Significant and straight sizing area can produce high precision and high surface quality of wire, but also conducive to reduce friction and wear, progressive drawing die service life greatly. The longer the work area to reduce friction and average distribution wire during drawing process, the wear reducing drawing die hole, the progressive die life. Sizing is determined finally the ultimate size of the link rod, short sizing area and not level will directly affect the ultimate quality of wire rod. Short the working area. In addition, the design of this type of work area can prevent the lubricant from the entrance end of the exit of drawing die. The test results show that, have a great impact on the structure of the drawing dies for drawing die. But our country mold because of work zone caused by short, effective use of smaller hole, not only increase the friction, aggravate the wear, and spreading the raw materials, increase the capital input.