GB/T 2856.7-1990 Punch die rolling guide die seat rear guide column upper die seat

GB/T 2856.7-1990 Punch die rolling guide die seat rear guide post upper die seat GB/T2856.7-1990 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Punch rolling guide die set
Back guide pillar upper die set
Holder for ball slide die sets for press toolsPunch holder for back pillar setsSubject content and scope of application
GB/T 2856.7—90
This standard specifies the materials, technical conditions, structural types and specifications of the back guide pillar upper die set of the punch rolling guide die set. This standard applies to the punch rolling guide die set. Reference standards
GB/T 12446
Technical conditions for punch die set parts
GB9439 Grey cast iron parts
3 Materials, technical conditions, structural types and specifications of the die set3.1 Material: HT200GB9439. Aging treatment twice. 3.2 Technical conditions shall be in accordance with the provisions of GB/T12446. 3.3 Structural types and specifications are shown in the figure and table.
Approved by the State Administration of Technical Supervision in 1990-0723
Implemented in 1991-05~01
GB/T 2856.7—90
3.4 ​​Marking example:bZxz.net
Die perimeter L=200mm, B=160mm, thickness H45mm, side guide pillar upper die seat: upper die seat 200×160×45 GB/T 2856.7 Die perimeter
Additional remarks:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. 2856.7-90
D (H6)
Basic dimensions
This standard is under the jurisdiction of the National Die Standardization Technical Committee. This standard was drafted by the Die 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 Ministry of Machinery and Electronics Industry Guilin Electrical Science Research Institute Mold Branch for interpretation.
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