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JB/T 9179.6-2013Machining allowances and tolerances of open die forgings on hydraulic presses - Part 6: Die blocks (English PDF)

液压机上钢质自由锻件机械加工余量与公差 第6部分:模块类

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

December 31, 2013

Implementation date

July 1, 2014

Scope

JB/T 9179.6-2013 is the English-translated version of 液压机上钢质自由锻件机械加工余量与公差 第6部分:模块类.

JB/T 9179.6-2013 is a recommended machinery industry standard of China for die-block forgings produced by open-die forging on a hydraulic press, and it gives their machining allowances and tolerances.

The blocks concerned are flattened at the axial ends, and the standard reaches blocks whose thickness does not exceed their width. Both the metal left on for machining and the permitted spread on the forged size are fixed there.

It belongs to Chinese classification J32 and to international classification 77.140.85. It quotes JB/T 9179.1-2013 and JB/T 9179.2-2013. The 1999 edition, JB/T 9179.6-1999, is replaced by it.

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Document preview — JB/T 9179.6-2013

National Standard of the People's Republic of China

ICS
77.140.85
Replacing
JB/T 9179.6-1999

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Contents

  • Foreword
  • Scope
  • Normative references
  • About this standard
  • Related standards
  • Classification and status

1 Foreword

JB/T 9179.6-2013 was issued by MIIT on 31 December 2013 and has been in force since 1 July 2014.

It replaces the earlier edition JB/T 9179.6-1999.

It is one of 15 parts of the JB/T 9179 series.

2 Scope

This standard is a recommended machinery industry standard of China for die-block forgings produced by open-die forging on a hydraulic press, and it gives their machining allowances and tolerances. The blocks concerned are flattened at the axial ends, and the standard reaches blocks whose thickness does not exceed their width. Both the metal left on for machining and the permitted spread on the forged size are fixed there. It belongs to Chinese classification J32 and to international classification 77.140.85. It quotes JB/T 9179.1-2013 and JB/T 9179.2-2013. The 1999 edition, JB/T 9179.6-1999, is replaced by it.

3 Normative references

JB/T 9179.6-2013 cites the following standards, which apply in full or in part through the references made to them in its clauses.

JB/T 9179.1-2013 — Machining Allowance and Tolerance of Open Die Steel Forgings on Hydraulic Press - Part 1: General Requirements

JB/T 9179.2-2013 — Machining allowances and tolerances of open die forgings on hydraulic press - Part 2: Round shaft, square shaft and rectangular cross-section

4 About this standard

Issued by: MIIT

English translation: about 15 pages

5 Related standards

Other parts of this standard:

JB/T 9179.1-1999 — General requirements

JB/T 9179.1-2013 — Machining Allowance and Tolerance of Open Die Steel Forgings on Hydraulic Press - Part 1: General Requirements

JB/T 9179.2-1999 — Round shafts, square shafts and rectangular sections

JB/T 9179.2-2013 — press - Part 2: Round shaft, square shaft and rectangular cross-section

JB/T 9179.3-1999 — Stepped shafts

JB/T 9179.3-2013 — press - Part 3: Stepped shaft

JB/T 9179.4-1999 — Discs and punched parts

JB/T 9179.4-2013 — press - Part 4: Disk and punched hole

JB/T 9179.5-1999 — Short cylinders

JB/T 9179.5-2013 — press - Part 5: Short round shaft

JB/T 9179.7-1999 — Cylinders

JB/T 9179.7-2013 — press - Part 7: Cylinder

JB/T 9179.8-1999 — Rings

JB/T 9179.8-2013 — Part 8: Rings, cylinder segments and flanges

Other editions:

JB/T 9179.6-1999 (earlier edition)

6 Classification and status

International classification (ICS): 77.140.85

Prefix JB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Similar standards

Editions of JB/T 9179.6

EditionTitleRevisionStatus
JB/T 9179.6-2013Machining allowances and tolerances of open die forgings on hydraulic presses - Part 6: Die blockscurrent editionCurrent
JB/T 9179.6-1999Machining allowances and tolerances of open die forgings on hydraulic presses - Part 6: Die blocksprevious editionSuperseded

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