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在汽车拖拉机等大批量齿轮生产中,滚齿的劳动量很大,要求单件齿轮的滚齿工时尽可能缩短到2分钟以下。用硬质合金滚刀实现高速滚齿的问题国外看法不一,曾经热门一时,后来由于刀齿的崩刃问题未得解决,就冷下来了。从1978年之后,美国“工具加工与生产”杂志发表了日本(?)藤铁工的新成果,认为采用直接传动的高刚度滚齿机,加上刀具方面的改进可以突破崩刃问题,并在日立公司DP12齿轮生产中取得了良好的技术经济效果。而本文提出,解决硬质合金滚刀崩刃问题主要是控制刀齿最大切削厚度不超过0.1毫米,并特别声称,机床的动态特性对刀齿的崩刃似乎关系不大,这一点与日本的观点不同,我们也不同意那种看法。但本文进行了一定的试验,有比较详细的数据,其结论是m≤2.5毫米可实现无崩刃高速滚齿,而m>2.5毫米者,则可采用粗、精两步加工,以实现硬质合金高速滚齿。综合结果,效率可提高0.9倍。国内几年来在这方面也作了许多试验研究工作,取得了一些进展,本刊也曾作过报导。关于国内外在这方面的发展动态和不同观点我们还将陆续予以报导,以供国内从事齿轮加工和刀具设计的同志们参考。
In the production of high-volume gear trains and other vehicles, hobbing a lot of labor, requiring a gear hobbing gear as short as possible to 2 minutes or less. The use of carbide hobs to achieve high-speed hobbing Foreign opinions vary, once a hot moment, and later because of the teeth of the chipping problems unresolved, it cooled down. Since 1978, the United States, “Tool Machining and Production” magazine published Japan (?) Fujitsu’s new results, that the use of direct transmission of high rigidity hobbing machine, coupled with tooling improvements can break the chipping problem, and Hitachi DP12 gear production company has made a good technical and economic results. However, this paper proposes that the solution to the problem of cemented carbide hob chipping is to control the maximum cutting thickness of the cutter no more than 0.1 mm. In particular, it is claimed that the dynamic characteristics of the machine tool do not seem to have much influence on the chipping of the cutter teeth. Different point of view, we do not agree with that view. However, some experiments have been carried out in this paper, with more detailed data. The conclusion is that m≤2.5 mm can realize high-speed gear hobbing without chipping, while those with m> 2.5 mm can be processed in rough and fine steps to achieve hard High-quality alloy hobbing. Combined results, the efficiency can be increased 0.9 times. In the past few years, many experiments and research work have been done in this area in China, and some progress has been made. The magazine also made reports. We will also continue to report on the development trends and different points of view both at home and abroad in this regard for the reference of domestic comrades engaged in gear processing and tool design.