JB/T 9193-1999 JB/T 9193-1999 Diameter of blank before rolling (or rolling) ordinary thread JB/T9193-1999 Standard download decompression password: www.bzxz.net
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1C:S 21.040.01 Machinery Industry Standard of the People's Republic of China JB/T9193-1999 The bar diameters for rolling eneral purpose screw threads 1999-06-24 Issued National Bureau of Machinery Industry 2000-01-01 Implementation JB/T9193-1999 This standard is a revision of JH203-83 "Bar diameters for rolling eneral purpose screw threads". During the revision, the standard was revised and adjusted according to the relevant schedule, and there was no change in the main technical content. This standard replaces JB2203 from the date of implementation This standard is proposed and managed by the National Standardization Technical Committee. Drafting unit of this standard: Mechanical Science Research Institute Main drafter: Li Xiaobin, ■Scope Mechanical industry standard of the People's Republic of China Bar diameter for rolling grneral purposc serew threads This standard specifies the bar diameter size and tolerance of rolling grneral purposc serew threads. JET 9193—1999 BZ 203—83 . This standard is applicable to the bar diameter of ordinary grneral purposc serew threads made of steel. It shall comply with the provisions of GD/T192, GB/T193 and GB/T197. 2 Referenced standards The provisions contained in the following standards constitute the provisions of this standard by being referenced in the standards. At the time of publication, the values shown are all valid. All standards are intended to be used. The possibility of using the latest version of the following standards should be explored in the application of the standards. CB/T192-1981 Basic tooth type of state thread GB/T193-1981- Common thread straightness and pitch series (diameter 1-600mm) GB/T197-1981 Common thread tolerance and fit (diameter 1-355mm) 3 The true diameter of the thread is calculated according to formula [ ] and formula (2]. The relative position of the thread diameter tolerance zone and the relative lightness tolerance zone is shown in Figure 1.demw-dimln+0.3 Ts, dem.dini.+0.7 T. Meanwhile: du.—Minimum rough thread diameter: —Maximum rough thread diameter: d.Minimum external thread pitch diameter T,—External thread pitch diameter tolerance dru—External effective pitch diameter Figure 1 Tolerance zone position of rough thread true diameter Approved by the State Machinery Industry Bureau on June 24, 1999 (implemented on January 1, 2000) Limit size of rough thread diameter JBT9193-1999 For diameter range of 1~39 mm, tolerance grade 6, basic deviation h, f or suitable for evaluation of snail thread. Its interference (rolling; thread hair point tax limit size see Table 1, for its local specifications or tolerances of ordinary screw hair bad diameter, can be authorized to the third competition to calculate the formula. Table difference (liquid thread hair diameter nominal diameter calibration tolerance zone nominal point diameter JB/T9193-1999 burning mosquito male and band nominal diameter JB/T 9193—1999 螈數公堂带 编西格 公积泊道 JB/T9193—1999 恨纹透差带 尔白经 14 653 14 917 22 949 28 914 20 949 18 257 18 B61 Nominal diameter 5Correction and adjustment of rough diameter B/9193-1999 (Complete) Thread tolerance zone When the axial length of the thread is less than 2, the rough diameter of the thread is reduced by 0.1a-0.24. When the thread material is harder or softer, the rough diameter should be corrected according to the specific situation. dwww.bzxz.net Required point diameter 4 34 936 33 185 34 854 56 245 37 8:4 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.