GB/T 15826.3-1995 Machining allowances and tolerances for hammer-forged steel free forgings - Discs with holes
Basic Information
Standard ID:
GB/T 15826.3-1995
Standard Name: Machining allowances and tolerances for hammer-forged steel free forgings - Discs with holes
Chinese Name:
锤上钢质自由锻件机械加工余量与公差 带孔圆盘类
Standard category:National Standard (GB)
state:Abolished
Date of Release1995-01-02
Date of Implementation:1996-08-01
Date of Expiration:2008-08-01
standard classification number
Standard ICS number:25.010
Standard Classification Number:Machinery>>Processing Technology>>J32 Forging
Publication information
publishing house:China Standards Press
Publication date:1996-08-01
other information
Release date:1995-12-14
Review date:2004-10-14
Drafting unit:Shanghai Mechanical and Electrical Industry Administration
Focal point unit:National Forging Standardization Technical Committee
Publishing department:State Bureau of Technical Supervision
competent authority:China Machinery Industry Federation
Introduction to standards:
GB/T 15826.3-1995 Machining allowances and tolerances for steel free forgings on hammers - Discs with holes GB/T15826.3-1995 Standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
Machining allowances and tolerancesfor steel open die forgings on hammer-Disks with holes
1 Subject content and scope of application
This standard specifies the machining allowances and tolerances for open die forgings on hammer-Disks with holes. GB/T 15826.3-—1995
This standard is applicable to open die forgings with holes whose dimensions meet 0.1D≤H≤1.5D and d≤0.5D. 2 Allowances and tolerances
The machining allowances and tolerances for open die forgings on hammer-Disks with holes shall comply with the provisions of Figure 1 and Table 1. 0.58
Approved by the State Technical Supervision Bureau on 1995-72-13 230
Implemented on 1996-08-01
3 General Notes
GB/T15826.3bzxZ.net
3.1 The minimum punching diameter of free forgings with holes and discs shall comply with the provisions of Table 2 Table 2
Tonnage of forging hammer, t
Minimum punching diameter d, mn
3.2 When the ratio of forging height to hole diameter is greater than 3 times, the hole is not allowed to be punched out 0.75
3.3 The rest shall comply with GB/T15826.1 "Machining allowances and tolerances of steel forgings on hammers" Additional Notes:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Forging Standardization. This standard is drafted by the Shanghai Mechanical and Electrical Industry Administration and other units. The main drafters of this standard are Dong Zhusheng, Pan Baimao, Lv Xiancheng, Zhang Bingji and Xie Huazhen. 2
General Requirements".
From the date of implementation of this series of standards, the original JB4049-86 "Machining allowances and tolerances of steel free forgings on hammers" standard will be invalid. 231
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