JIS-B-0712-1969-R1983-ENG.pdf
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1、IS UDC 621.9.012 JAPANESE I NDUSTRIAL STANDARD Stock Allowance for Finish Cut JIS B 07 I 2-1969 Translated and Published by Japanese Standards Association 4 s Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing,
2、 Bernie Not for Resale, 03/10/2007 19:16:01 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S B*712 69 4933608 0008575 5 S Translation without guarantee standard in Japanese is to be evidence i n the event of any doubt arising, the original I Copyright Japanese Standard
3、s Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:16:01 MSTNo reproduction or networking permitted without license from IHS -,-,- UDC 621.9 .O12 I L JAPANESE INDUSTRIAL STANDARD J I S Stock Allowance for Finish Cut
4、B 0712-1969 (Reaffirmed: 1983) 1. Scope This Japanese Industrial Standard specifies the final stock allowance for finish cut covering the objects the grade of size tolerance of which are generally I T 8 of JIS B 0401 and those superior thereto i n the turning, boring, milling, planing, shaping, slot
5、ting and reaming finish of metallic materials. 2. Definitions The definitions of terms principally used i n t h i s standard shall be as follows : (1) stock allowance for finish cut remaining on the work i n pre-working so that the work can be eco- nomically finish cut t o a specified shape, size an
6、d finish surface roughness. It means the size of spare thickness (2) pre-working It means the working until the f i n a l stock allowance for finish cut is remained. 3. Classification of Stock Allowances f o r Finishes The classification of stock allowances for finish cut specified i n t h i s stand
7、ard, hereinafter referred t o as the “finish allowance“, shall be as follows : (1) Stock allowance for finish turning (2) Stock allowance for finish boring (3) ( 4 ) (5) (6) Stock allowance for finish slotting (7) Stock allowance for finish milling Stock allowance for finish planing Stock allowance
8、for finish shaping Stock allowance for finish reaming I - - Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:16:01 MSTNo reproduction or networking permitted without license from IHS -,-,
9、- J I S B*071E b 4933608 0008577 9 I 2 B 0712-1969 4 . Machining Method and Finish Allowances Finish allowances for respective machining methods and matters influ- encing them shall be as given in following Table. Machining method Slotting oring Milling Planing Shaping Slotting Reaming f inisli Fini
10、sh allowance (mm) 0.1 to 0.5 (relating to diameter) 0.05 to 0.4 (relating to diameter ) 0.1 to 0.3 0.2 to 0.5 0.1 to 0.25 0.1 to 0.2 Finish ameter to di- ameter) I I ,:o 20 - 0.1 to0.5 0.2 to0.7 0.2 t 0 l . O Pfatters influencing finish allowance Inherent matters (1) For the cutting of end surface a
11、nd inner surface, the finish allowance shall be smaller. (2) In the case of using a spring tool for finish, the finish allowance shall be especially 0.05 to 0.15 nun. (3) In the case of using a diamond tool for finish, the finish allowance shall be especially 0.05 to 0.2 mm. (1) In the case where th
12、e boring bar. is cantilever, the finish allowance shall be smaller because it is sometimes deflected due to cutting resistance. (2) In the case of both ends support, it can be made slightly larger than that in the case of (1). (3) In the case of using both cutting edges, it shall be 0.1 to 0.15 mm.
13、(1) In the case of using end m i l l for finish, it is sometimes 0.05 mm. (2) In the case of upward milling, the cutting edge is superficially slided a t the s t a r t of cutting and a specified depth of cut can not be sometimes obtained. Therefore, cares shall be taken thereto. (3) In the case of f
14、ace milling, the finish allowance shall be larger. In the case of using square corner straight tool for finish, it shall be especially 0.03 t o 0.1 mm. In the case of using square corner straight tool, it shall be especially 0.03 to 0.05 mm. In the case of using square corner straight tool, it shall
15、 be especially 0.05 to 0.1 mm (1) To obtain good finished surface and precision, i t is preferable t o cut the object with a slightly smaller finish allowance. cast iron and soft metal with good chip running out, can be slightly larger than that for steel. approx. one half the numerical value given
16、in the l e f t table by pre- working with multi-grooving, lower reaming o r the like. (4) In the case of the hole the length of which is longer i n comparison with its diameter, the finish allowance shall be larger. (2) The finish allowance i n the case of (3) The finish allowance can be made Common
17、 matters (refer to 5.) (1) Rigidity of machine tool (2) Cutting quality of (3) Fitting rigidity of ( 4 ) Quality of materiais to (5) The shape and size of (6) Removal and f i t t i n g of (7) Fitting rigidity of (8) Grade of size tolerance (9) Roughness of finislied (10) Cutting speed (1l)Cutting o
18、i l agents cu t ter cutter be machined materials to be machined materials to be machined materials t o be machined surface Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:16:01 MSTNo rep
19、roduction or networking permitted without license from IHS -,-,- J I S BM07LF) 69 4933608 0008578 O 3 B 0712-1969 a 5. Common Matters Influencing Finish Allowance The value of finish allowance shall be necessarily determined by suf- ficiently considering various matters given as follows, where there
20、 is a fear that the precision of pre-working and the finish surface are deteriorated by influences of the rigidity and precision of machine tool, tools and their f i t t i n g rigidity, the shape, size, thermal expansion coefficient and f i t t i n g rigidity of materials t o be machined, cutting co
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