《JIS-B-0706-1987-R2003-ENG.pdf》由会员分享，可在线阅读，更多相关《JIS-B-0706-1987-R2003-ENG.pdf（11页珍藏版）》请在三一文库上搜索。
1、7 - i- - - - - - I J I S B*070b 87 W 4933b08 0008552 4 UDC 669-134 : 62-408.64 JAPANESE INDUSTRIAL STANDARD Corner and Fillet Radii of Forged Parts (Hot and Warm Forgings) JIS B 0 7 0 6 - 1 9 8 7 Translated and Published by Japanese Standards Association Printed in Japan 6s Copyright Japanese Standa
2、rds Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- . J I S Bm070b 87 = 4933b88 0008553 b In the event of any doubt arising, the origin
3、al Standard in Japanese is to be final authority , Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- - JIS B
4、*070b 87 4933608 000855Q 8 - UDC 669-1 34:62-408.64 JAPANESE INDUSTRIAL STANDARD J I S Corner and Fillet Radii of Forged Parts (Hot and Warm Forgings) B 0706-1987 1. Scope This Japanese Industrial Standard specifies the roundness values of corners and edges at sectional form transition parts and at
5、plane form transition parts made by die forging in hot and warm process, hereinafter referred to as the “forged product“ for ordinary steel and special steel forgings. Remark: This standard specifies the recommended values of roundness which are considered generally economical in design drawings and
6、 in manufacture of forgings. It is advisable to provide a machine part with a unified roundness value as far as possible, 2. Definition The terms used in this Standard shall be as follows: (1) draft angle An inclination given the side of forged products to tilt it The kind of draft angle which again
7、st the forging direction for the purpose of expediting the flow of materials and facilitating the production of the products from the die immedialely after the closed die forging. helps the forged parts easily come off the die shall be called the outward draft angle. -The kind which helps the forged
8、 part tighten the die shall be called the inward draft angle (see Fig. 1). Fig. 1 Inward draft angle Outward draft angle -f Applicable Standards: JIS B 0415-Dimensional Tolerance for Steel Die Forgings (Hammer and Press Forgings) JIS Z 8601-Preferred Numbers Copyright Japanese Standards Association
9、Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*070b 87 I 4933608 U008555 T 2 B 0706-1987 (2) sectional form transition part The part where
10、 the contour line changes in the sectional area vertical to the die splitting surface of a forged product (the portions encircled by the signs O in Fig. 2). Fig. 2 Die splitting plane$- -4 - (3) plane form transition part The part where the contour line changes in the sectional area parallel to the
11、die splitting plane of a forged product (the portions encircled by the signs O in Fig. 3). (4) corners and edges The corners and edges of the planes which constitute a forged product (see Fig. 4). Fig. 4 Fig. 3 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=I
12、HS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 B 0706-1987 (5) roundness The roundness at the corners and edges in the sectional form The roundness values transition part and in the plane form
13、 transition part. shall be expressed by the dimension of radius of roundness. Remark: The meanings of symbols used in this Standard shall be as follows: Y : Roundness of corners : Roundness of corners in a sectional form transition part r a : Roundness of corners in a plane form transition part R :
14、Roundness of edges A,: Roundness of edges in a sectional form transition part (Outward draft angle) Ra: Roundness of edges in a sectional form transition part (Inward draft angle) R : Roundness of edges in a plane form transition part H : Height of the stairs in a sectional area transition part b :
15、Width of the rib in a plane form transition part L : Length of the rib in a plane form transition part 3. Values of Roundness and Dimensional Allowances The roundness values and size allowances shall be as follows: (1) Values of Roundness in a sectional area transition part and a plane form transiti
16、on part shall be as given in Table 1. The values of corner roundness and edge roundness Table 1. Roundness Unit: mm 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 30, (35), 40, 50 Remarks 1. When the roundness value exceeds 50 mm, R 10 of JIS Z 8601 (Preferred Numbers) shall be applied. 2. The v
17、alue of roundness given in parentheses should preferably not be used. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license fro
18、m IHS -,-,- J I S B*070b 87 4933608 0008557 3 Roundness value 10 and under Over 32 incl. 10 to Over 32 to Y (RI 100 incl. 4 B 0706-1987 Over 100 (2) Allowances for Roundness Value The allowances for the roundness values of corners and edges in sectional area transition parts and plane form transitio
19、n parts shall be in accordance with Table 2 JIS B 0415 Dimensional Tolerance for Steel die Forgings (Hammer and press Forgings 3 , Table 2. Allowances for Roundness Values Unit: mm +O. 5 X Y (i Allowance -0.25X Y (R) +O. 4 x Y ( R ) +O. 3 2 X Y ( R ) +O. 2 5 X Y ( R ) -0.2X Y (R) -0.15X Y ( R ) -0.1
20、 X Y ( R ) Over 10 to 16 incl. 2. 5 1 . 5 4. Application of Roundness Values In Sectional Form Transition Parts 4.1 Corner Roundness Application of the corner roundness y1 in the sectional form transition part shall be in accordance with Table 3. Over 16 toover 2 5 toover 40 toover 63 toover 100 25
21、incl. 40 incl. 63 incl. 100 incl. to 160 incl. 3 4 5 8 12 2 2. 5 3 4 6 Table 3 Unit: mm Height of Division I Normal Precise Remark: The roundness of corner angles in the end parts as shown in the figures below shall be about 3 times the roundness values in Table 3, and shall be selected from the rou
22、ndness values in Table 1. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 B 0706-1987 4.2 Edge Roundness
23、 Application of edge roundness values R in sectional form a transition part of the outward and inward draft angles shall conform to Tables 4 and 5, respectively. 10 and under 16 incl. 25 incl. 40 incl. 63 incl. Over io to Over 16 to Over .25 to Over 40 to Normal 4 5 6 8 10 precise 2 3 4 5 6 Table 4.
24、 Values of Edge Roundness RI for Outward Draft Angles Over 63 to Over 100 100 incl. to 160 incl, 16 25 8 12 Die splitting plane p$ toover 63 to to to 100 incl. 160 16 20 30 Table 7 Precise 3 4 5 6 8 12 16 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Emp
25、loyees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,- e B 0706-1987 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment: 1963-03-01 Date of Revision: 198
26、7-10-01 Date of Public Notice in Official Gazette: 1987-10-03 Investigated by: Japanese Industrial Standards Committee Divisional Council on Machine Elements This English translation is published by: 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan 0 JSA, 1988 Japanese Standards Association . Printed i n Tokyo by Hohbunsha Co., Ud. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:02 MDTNo reproduction or networking permitted without license from IHS -,-,-