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（z） 一、内圆磨床 十年来,国外内圆磨床在提高效率、自动化程度和万能性方面有较大的发展。如:机床的磨削循环时间由几分钟缩短到几秒钟,生产率由班产几十件,几百件,增加到一、二千件。但是在磨削精度方面,进展不大。现将有关情况概述如下: 1.磨削新工艺的探索与新技术的应用 （1）控制力磨削:是美国Heald公司发展的新颖的磨削原理。在六十年代初期,该公司生产了加工中等规格另件的ICF90型及ICF91型控制力内圆磨床,最近又生产了加工大小规格的ICF90型和SCF90型,满足了加工φ10～φ300毫米的工件,组成了一个系列。这种机床的特点是进给速度随磨削力变化而变化,以保证恒定不变的磨削力,使砂轮始终保持在最佳条件下工作,在保证最高生产率前提下,达到最好的精度。如SCF90型,加工φ10×φ6×5（外径×内径×孔深）的环形另件,加工余量为0.1毫米,表面光洁度9～10,尺寸公差98％在5微米范围内,循环时间仅需要10秒,根据试验可缩短到6秒。十多年来已生产700多台以上。主要适用于大量大批生产的行业,生产率可提高150％,废品率最高下降50％。
(Z) First, the internal grinder 10 years, foreign internal grinder in improving efficiency, automation and versatility have greater development. Such as: grinding machine cycle time reduced from a few minutes to a few seconds, productivity by the production of dozens of pieces, a few hundred pieces, an increase to one, two thousand pieces. However, in the grinding accuracy, little progress. Now the situation is summarized as follows: 1. Exploration of new grinding technology and the application of new technologies (1) Control grinding: the United States developed a new grinding principle Heald. In the early 1960s, the company produced internal control grinder models ICF90 and ICF91, which machined medium-sized components. Recently, the ICF90 and SCF90 models were also manufactured to meet the machining requirements for φ10 to φ300 mm workpieces , Formed a series. This machine is characterized by feed rate changes with the grinding force changes in order to ensure a constant grinding force, the wheel is always in the best conditions to work under the premise of ensuring the highest productivity, to achieve the best accuracy . Such as SCF90-type, processing φ10 × φ6 × 5 (diameter × diameter × hole depth) of the ring pieces, machining allowance of 0.1 mm, surface finish 9 to 10, dimensional tolerance of 98% in the range of 5 microns, the cycle time It takes 10 seconds, according to the test can be shortened to 6 seconds. Over a decade has produced more than 700 units. Mainly applied to a large number of mass-produced industries, the productivity can be increased by 150%, the highest rejection rate of 50%.