尺寸标注与加工余量(国外英文资料).docVIP

尺寸标注与加工余量(国外英文资料) Machining allowance Allowance for machining Allowance for machining 25EQY - 19-1999 1., the subject content and scope of application The standard specifies the machining allowance for grinding. This standard applies to grinding all kinds of materials when processing allowance. 2. technical content Processing allowance table (1) Surface grinding allowance (single-sided) with a thickness of 4 or more Plane length Flat width below 200 More than 200 plane width Less than 100 Zero point three 100-250 Zero point four five 251-500 Zero point five Zero point six 500-800 Zero point six Zero point six five Description - 1., two plane grinding allowance, multiplying factor 1.5 2., three plane grinding allowance, multiplying factor 2 3. thickness of 4 or more, single-sided margin of not less than 0.5-0.8 4. rubber mold plate side allowance is not less than 0.7 Rough machining allowance (two) 3.2 I: garden clubs - (1) the maximum diameter of workpiece without tolerance requirements, finish in the following cases at, - no external grinding die with a shoulder of the punch and die, punch and push rod, promotion, limiter, supporting rod, screw, bolt, nut, screw diameter must roll flowers. (mm) Workpiece diameter (D) Length of workpiece L The amount of cutting on the blade and the allowance for turning the two end (each piece) 70 71-120 121-200 201-300 301-450 Machining allowance on diameter Less than or equal to 32 One Two Two Three Four 5-10 33-60 Two Three Three Four Five 4-6 61-100 Three Four Four Four Five 4-6 101-200 Four Five Five Five Six 4-6 1.6 when the D 36 is not suitable for the U-turn clamp processing, in the processing of a single workpiece, the amount of chuck L should be 10-15. (2) the maximum diameter of workpiece with tolerance requirements, finish in at or above, for example - cylindrical die must be grinding, stop pin, shoulder to grinding punch or die. (mm) Workpiece diameter (D) Length of workpiece L The amount of cutting on the blade and t