《铝及铝合金模锻件的尺寸偏差及加工余量》（Dimensions deviation and machining allowance of aluminum and aluminium alloy die forging）.docVIP

《铝及铝合金模锻件的尺寸偏差及加工余量》（Dimensions deviation and machining allowance of aluminum and aluminium alloy die forging） Size deviation of aluminum and aluminum alloy die forging and machining allowance The preparation of the national standard draft for review First, the job is brief 1. Task source 1.1 the size deviation of aluminium and aluminium alloy die forging and machining allowance national standard is the basis of Chinas aluminium and aluminium alloy module standard, the 1987 edition of GB/T 1987-1987 the size deviation of aluminium and aluminium alloy die forging and machining allowance national standards, due to the long age, technical index is low, already can not adapt to the rapid development of our industry and the needs of the aluminium and aluminium alloy die forging products. Therefore, it is urgent to revise the national standards to meet the needs of domestic, foreign markets and users. 1.2 the national nonferrous metals standardization technical committee to color standard committee [2011] no. 4 issued the size deviation of aluminium and aluminium alloy die forging and machining allowance national standards drafting tasks, and the southwest aluminum (group) co., LTD., China nonferrous metals industry quality standard dose research institute, the northeast light alloy co., LTD and other units for the drafting unit, jointly drafted. The project code is:t-610, the planned completion period is 2011. Main working process and collaboration unit 2.1 on July 26, 2010 - July 29, presided over by national non-ferrous light standard committee was held in yantai city of shandong province in this series will the task of the national standard implementation, set up the standard drafting group at the meeting, editor in chief of the unit as follows: the southwest aluminum (group) co., LTD. The deputy chief editor is: China nonferrous metal industry standard metrology institute; The unit is: northeast light alloy limited liability company and other units. 2.2 the