GB/T 2856.3-1990 Punch die rolling guide die seat intermediate guide pin upper die seat GB/T2856.3-1990 standard download decompression password: www.bzxz.net
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National Standard of the People's Republic of ChinawwW.bzxz.Net Punch rolling guide die set Intermediate guide pillar upper die set Holder for ball slide die sets for press toolsPunch holder for center pillar setsSubject content and scope of application GB/T 2856.3—90 Replaces GB2856.3—81 This standard specifies the materials, technical conditions, structural types and specifications of the intermediate guide pillar upper die set of the punch rolling guide die set. This standard applies to the punch rolling guide die set. 2 Reference standards GB/T12446 Technical conditions for die set parts GB9439 Grey cast iron parts 3 Materials, technical conditions, structural types and specifications of die sets3.1 Material: HT200GB9439. Aging treatment twice. 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 and implemented on May 1, 1991 Die hole depth 14 ≥160 GB/T 2856.3—90 3.4 Marking example: Die perimeter L=200mm, B=160mm, thickness H=45mm, middle guide pin upper die seat: upper die seat 200×160×45GB/T2856.364 Die perimeter Additional instructions: GB/T2856.3—90 This standard is 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 Technical Committee for Die Standardization. Limit 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. Limit This standard is entrusted to the Mold Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry for interpretation. 25.5 M6---6H Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.