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一、前言在最近塑性制品的加工中,制品精度的提高以及为提高生产率的高速化、自动化技术取得的进步是显著的。就被加工材料来说,高硬度和不锈钢等难加工材料亦有增加的趋势,金属模的服役条件更加苛刻。另一方面,由商品的多样化、短命化引起的多品种小批量生产和由产品的集约化引起的大批量生产的两极化的发展,要求适用于各种情况的金属模。而且,就金属模的制作来说,随着金属丝放电加工和新的表面处理(涂复TiN)等方法的采用,出现了和以往不同的损坏现象。但是,由金属模加工和热处理情况不良而产生的与这些基本的模具加工技术有关的事故仍然是多数。总之,为防止金属
I. INTRODUCTION In the recent processing of plastic products, the improvement of the precision of the products and the improvement of the automation technology in order to increase the productivity are remarkable. As far as the processed materials are concerned, there is also an increasing tendency for difficult-to-machine materials such as high hardness and stainless steel, and the service conditions of the metal mold are more harsh. On the other hand, the development of multi-species low-volume production caused by the diversification and short-term diversification of products and the polarization of mass production caused by the intensification of products require molds suitable for various situations. Moreover, in the production of metal mold, with the wire EDM and the new surface treatment (coating TiN) methods such as the use of the emergence of the damage and the previous different phenomenon. However, the number of accidents associated with these basic mold-processing technologies, which are caused by poor mold processing and heat treatment, remains the majority. In short, to prevent metal