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1、J I S B*0415 75 M 4933b08 0008328 T I UDC 621.753.1 :621.73.016.2 Y JIS JAPANESE I NDUSTRIAL STANDARD Dimensional Tolerance for Steel Die Forgings (Hammer and Press Forging) JIS B 04 1 5 - 1 9 7 5 Translated and Published by Japanese Standards Association Printed in Japan 12 s Copyright Japanese Sta
2、ndards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 21:00:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Translation without guarantee standard in Japanese is to be evidence i n the eve
3、nt of any doubt arising, the original e O Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 21:00:08 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*04L5 75
4、4733608 8008330 UDC 621.753.1:621.73.016.2 Fig. 1. Indication of Dimensions Fig. 2. Dimensions of Length and Width between External Surfaces I JAPANESE INDUSTRIAL STANDARD J I S Dimensional Tolerance for B 0415-1975 Steel Die Forgings (Reaffirmed: 1978) (Hammer and Press Forging) 1. Scope This Japan
5、ese Industrial Standard specifies the dimensional tolerances and deviations for thickness , length, width, height , centre-to-centre dimension, fillet and edge radii, draft angle, mismatch, camber, eccentricity of deep hole, residual flash and trimmed flat, burr, ejector mark, surface unevenness, de
6、for- mation at sheared end, and local deformation of unforged portion of carbon steel and alloy steel die forgings (l) manufactured by hammer and press, hereinafter referred to as the “forgings“. Note (l) The forgings herein stated imply the final products at the time of delivery. 2. Definitions The
7、 principal terms used in this standard are as defined below. (1) thichess Thickness of a section perpendicular to the die parting plane (see Fig. 1). (2) length, width and height to the die parting plane of forging dies, or as nearly so as practical con- siderations will permit. perpendicular to the
8、 same die parting plane (see Figs. 1 to 4 ) . Length and width are those which are parallel Height is a dimension that is in depth direction Die parting line o ,3r;.8 !over 3.2 to 1.8 ncl to 5.6 I incl.- I inci. 0.8 1 1 1.2 I 1.4, 1.2 0.8 1 1 1.2 1 1.4 1 1.7 1.4 I 1.7 2 2.4 2.8 I Remark: These permi
9、ssible values shall be adopted independently of any other tolerances. 7.10 Permissible Values for Burr Unit: mm in1 1 1.6 2.5 i 4 I CI I .- A, J Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2
10、007 21:00:08 MDTNo reproduction or networking permitted without license from IHS -,-,- 7.11 Permissible Values for Depth or Height of Sunken or Raised Ejector Mark Unit: mm Division of Permissible value 1 1.2 1.6 2 2.4 3.2 4151 , 6.4 1 8 10 12.6 i I These permissible values shall be adopted independ
11、ently of any other tolerances . Remark: 7.12 Permissible Values for Surface Unevenness Unit: mm I Division of Machined surface I Unfinished surface surface unevenness 1 1 2 3 Permissible vaiue (iaohtnlng dlo$Vnnce)x- (Tolorance for 1hlchessIX- 7.13 Permissible Values for Deformation at Sheared End U
12、nit: mm 36 and under i Over 36 I Dldslon a1 Ulameler of unorged bar, dock c 4 1Xd 1 O. 7Xd Ih I“ and under O Permissible value Remark: These permissible values shall be adopted independently of any other tolerances . Copyright Japanese Standards Association Provided by IHS under license with JSALice
13、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 21:00:08 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS B*0415 75 = 4933608 0008349 7 20. B 0415-1975 7.14 Deviations for Local Deformation of Unforged Portion The deviations for diameter of un
14、forged bar stock which have been locally deformed shall be the same as the deviations of common grade applied to the nominal dimension cor- responding to the diameter of unforged bar stock specified in 7.2. The length of the portion shall be 1.5 times the diameter d of unforged bar stock and be limi
15、ted up to 100 mm. i. 4 1.5 d, 100 mm max. over this length. -Any eccentricity or taper is permissible Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 21:00:08 MDTNo reproduction or networki
16、ng permitted without license from IHS -,-,- J I S BX0415 75 4933608 0008350 3 i B 0415-1975 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment: 1975-09-01 Date of Reaffirmation: 1978-09-01 Date of Public Notice in Official Gazette: 1978-10-30 In
17、vestigated by: Japanese Industrial Standards Committee Divisional Council on Machine Element Technical Committee on Dimensional Tolerance for Forgings T h i s English translation is published by: Japanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan 0 JSA, 1981 Printed i n Tokyo by Hohbunsha Co.,Ltd. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 21:00:08 MDTNo reproduction or networking permitted without license from IHS -,-,-
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