Standard No.:	QC/T 268-1999
English Name:	Extreme deviation for undeclared tolerance size of processing parts for automobile cold stamping
Chinese Name:	汽车冷冲压加工零件未注公差尺寸的极限偏差
Professional Classification:	QC    Professional Standard - Automobile
Issued on:	1999-1-1
Implemented on:	1999-1-1
Status:	superseded
Superseded by:	QC/T 268-2023 Permissible automobile cold stamping variations in dimensions without tolerance indication
Superseded on:	2023-11-1
Superseding:	ZB T 04006.3-1989 ZB T 04006.3-1989
Target Language:	English
File Format:	PDF
Word Count:	5000 words
Translation Price(USD):	120.0
Delivery:	via email in 1 business day

1 Subject content and applicable scope This standard specifies the permissible limit deviation in dimensions without tolerance indication for the features of size formed after cold stamping processing in the automobile part drawing. This standard is applicable to the permissible limit deviation in dimensions without tolerance indication after cold stamping processing in the automobile part drawing. 2 Terms Blanking dimension: the measured dimension of the bright belt of the blanked parts. 3 Permissible limit deviation in dimensions without tolerance indication for flat stamping processing 3.1 The permissible limit deviation in dimensions without tolerance indication of the blanking length L and diameters D and d for flat stamping shall be in accordance with those specified in Figure 1 and Table 1.

1 Subject content and applicable scope 2 Terms 3 Permissible limit deviation in dimensions without tolerance indication for flat stamping processing 4 Dimensional tolerance of formed bent parts 5 Permissible limit deviation in dimensions without tolerance indication for formed drawing 6 Permissible limit deviation in dimensions without tolerance indication of hole edge distance, hole center distance and hole interval of stamped parts Additional explanation: