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麻花钻是机械加工中大量使用的孔加工刀具。钻头制造业每年要消耗大量的高速钢。为节约材料,提高劳动生产率和改善钻头原材料的组织,国内、外工具厂广泛采用压力加工工艺来制造钻头。这些工艺方法是四辊轧、四板搓、轧—扭和挤压等。其中工艺性和经济效果较好,同时,技术难度较大的也要数挤压钻头工艺。世界上最先使用挤压工艺生产钻头的是西德RohdeandD(?)rrenberg公司,目前已有型号为K35和K70的两种油压机,制造钻头的规格分别为φ13—φ35和φ35.5—φ70。该公司曾向日本、苏联、东德等国出口了其挤压钻头设备和技术。据报导,苏联是从1982年起才将挤压钻头工艺作为一项先进技术用于生产的。
Twist drill is a large number of hole machining tools used in machining. The bit manufacturing industry consumes a lot of high-speed steel each year. In order to save materials, improve labor productivity and improve the organization of bit raw materials, domestic and foreign tool factories widely use pressure processing technology to manufacture drill bits. These processes are four-roll rolling, four-panel rubbing, rolling - twisting and extrusion. One of the better technology and economic effects, at the same time, more difficult to squeeze the number of bit technology. The world’s first to use the extrusion process is the production of drill bit RohdeandD (?) Rrenberg West Germany company, there are two types of hydraulic presses K35 and K70, the specifications for the manufacture of drill φ13-φ35 and φ35.5-φ70. The company exported its extrusion bit equipment and technology to Japan, the Soviet Union, East Germany and other countries. It has been reported that the Soviet Union has used squeeze bit technology as an advanced technology for production since 1982.