This standard specifies the tolerance grade and limit deviation value of the un-toleranced dimensions, fillet radius and angle of stamping parts. This standard applies to metal stamping parts, and non-metal stamping parts can refer to this standard. The limit deviation specified in this standard applies to non-matching dimensions. This standard does not apply to precision stamping and cold extrusion parts. GB/T 15055-1994 Limit deviation of un-toleranced dimensions of stamping parts GB/T15055-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Stampings
Permissible stamping variates indimensious without lolerance indication1 Subject content and scope of application
GB/T 15055.- 94
This standard specifies the tolerance grade and limit deviation values ​​of the unindicated tolerance dimensions, fillet radius and angle of stampings. This standard applies to metal stampings, and non-metal stampings can refer to this standard. The limit deviations specified in this standard apply to non-matching dimensions. This standard does not apply to precision stamping and cold extrusion parts. 2 Tolerance Grade
The limit deviations of blanking dimensions without tolerance, forming dimensions without tolerance, angles without tolerance and corner radius without tolerance are divided into four tolerance grades: f (fine), m (medium), c coarse), and v (very coarse). The limit deviations of corner radius without tolerance are not divided into tolerance grades. 3 Limit Deviations of Dimensions without Tolerance
3.1 The limit deviations of blanking dimensions without tolerance are specified in Table 1. Approved by the State Administration of Technical Supervision on May 3, 1994 66
Implemented on March 1, 1995
Basic wood scale temple
GB/T15055--94
Limit deviation of blanking dimensions without tolerance
Material thickness
Note: Tolerances should be marked for dimensions below 0.5 and 0.5 mm 3.2 Limit deviations of formed dimensions without tolerances shall be as specified in Table 2. Tolerances
Basic dimensions
Material thickness
GB/T15055--94
Limit deviations of formed dimensions without tolerances
Note: Tolerances should be marked for dimensions below 0.5 and 0.5 mm. 3.3 Limit deviations of fillet radius without tolerance 3.3.1 Limit deviations of fillet radius without tolerance shall be as specified in Table 3. 68
Basic dimensions
GB/T15055—94
Limit deviation of radius of blanking corner without tolerance Material thickness
3.3.2 Limit deviation of radius of forming corner without tolerance shall be as specified in Table 4.
Table 4 Limit deviation of radius of forming corner without tolerance Basic dimensions
Limit deviation
3.4 ​​Limit deviation of angle without tolerance
>3～6
>6～10
3.4.1 Limit deviation of blanking angle without tolerance shall be as specified in Table 5. >10～~18
Table 5 Limit deviation of blanking angle without tolerance Tolerance grade
>10～25
±0°40″
±1°30
>25~63
±0°30
±0°45
>63～160
±0°20°
±0°45'
The limit deviation of bending angle without tolerance shall be as specified in Table 6. Degree, mm
>160~400
±0° 20
±0°30
≥18～30
>400~1000wwW.bzxz.Net
±010″
±0°15
±0°20
>1000~2500
±0°06
±0°10
+0°15
Tolerance level
±1°15
-2°00
±3°00
Adopt the expression method of this standard
GB/T 15055-94
Table 6 Limit deviation of bending angle without tolerance short
>10～25
+2°00
±0°45
±1°00
degrees, mm
+0°30
+0°45
：030
The limit deviation of the dimension without tolerance specified in this standard shall be indicated by the guide and tolerance grade symbol of this standard in the corresponding drawings, technical documents or standards. For example, when the tolerance grade of m in this standard is selected, it is expressed as: GB/T15055-m Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the Beijing Electromechanical Research Institute of the Ministry of Machinery Industry. This standard was drafted by the First Tractor Factory, and the Technology Institute of the Ministry of Machinery Industry, the First Automobile Manufacturing Plant, the 211 Factory of the Ministry of Aeronautics and Astronautics and the Xiangtan Electric Motor Factory participated in the drafting.
The main drafter of this standard is Shi Dingyong.
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