GB/T 2855.12-1990 Die sliding guide die seat intermediate guide column circular lower die seat

GB/T 2855.12-1990 Die sliding guide die seat intermediate guide column circular lower die seat GB/T2855.12-1990 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Sliding guide die sets for press tools
Intermediate guide pillar round lower die sets
Holder for slidiag guide die sets for press toolsDie holder for center pillar sets(round)Subject content and scope of application
GB/T 2855 .12--90
Replaces GB2855.12-81
This standard specifies the materials, technical conditions, structural types and specifications of the intermediate guide pillar round lower die sets for the sliding guide die sets of press tools. This standard applies to the sliding guide die sets of press tools. Reference standards
GB/T12446 Technical conditions for die sets parts GB9439 Grey cast iron partsbzxz.net
3 Materials, technical conditions, structural types and specifications of die sets 3.1 Material: HT200GB9439.
3.2 Technical conditions shall be in accordance with the provisions of GB/T12446. 3.3 The structural type and specifications are shown in the table.
Approved by the State Administration of Technical Supervision on July 23, 1990, 44
-05-01 implementation
3.4 ​​Marking example:
GB/T 2855.12--90
Die perimeter D. = 200mm, thickness H = 60mm, intermediate guide column round lower die seat: lower die seat 200×60GB/T2855.12
GB/T2855.12—90
Prohibited dimensions
170240
210280
758720
Note: ①The shape and plane size of the platen are determined by the manufacturer. 16
Limit deviation
d,(R7)
Basic size
Installation of B-type guide column, d (R7), d, (R7) change to d (H7), d, (H7) 46
Limit deviation
-0.050M16-
GB/T:2855.12-90
Additional instructions:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Mold Standardization Technical Committee. This standard was drafted by the Mold Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Wang Huachang and Qin Guangwei. This standard is entrusted to the Mold Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry for interpretation. 47
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