GB/T 21684-2008 in English

《GB/T 21684-2008木工机床　二、三、四面铣床　术语和精度》由TC84（全国木工机床与刀具标准化技术委员会）归口，主管部门为中国机械工业联合会。
本标准规定了二、三、四面铣床各部分的术语，同时参照GB/T 17421.1-1998，规定了机床的几何精度检验和工作精度检验，并给定了相应的允差，适用于一般用途、普通精度的机床。本标准只规定机床的精度检验，不适用于机床的运转试验（如振动、异常噪声、零部件的爬行等检验），也不适用于机床的特性检验（如速度、进给量等），这些检验一般宜在机床精度检验前进行。　 本标准等同采用ＩＳＯ７９４７：１９８５《木工机床　二、三、四面铣床　术语和验收条件》（英文版）

Scope

This standard specifies the terminology of each part of two-, three-, and four-sided milling machines (hereinafter referred to as machine tools). At the same time, referring to GB/T 17421.1-1998, it specifies the geometric accuracy inspection and working accuracy inspection of machine tools, and gives the corresponding tolerances. Suitable for general purpose, ordinary precision machine tools. This standard only stipulates the accuracy inspection of machine tools, and is not applicable to the operation tests of machine tools (such as vibration, abnormal noise, crawling of parts, etc.), nor is it applicable to the characteristic inspection of machine tools (such as speed, feed rate, etc.), these The inspection should generally be carried out before the accuracy inspection of the machine tool.