This standard specifies the surface roughness parameters, parameter values and general rules for the requirements for plastic parts.
It is mainly applicable to the surface roughness for plastic parts of electronics, aerospace products, instrumentation and apparatus as well as other products, and is a reference for the surface roughness for plastic parts of other products.
2 Normative references
GB 131 Mechanical drawings - Surface roughness symbols and methods of indicating
GB 1031 Surface roughness parameters and their values
GB 3505 Surface roughness - Terminology - Surface and its parameters
3 Terms and symbols
Terms used in this standard, such as arithmetical mean deviation of the profile Ra, ten point height of irregularities Rz, maximum height of the profile Ry, sampling length l, evaluation length ln, mean spacing of the profile irregularities Sm, mean spacing of local peaks of the profile S, profile bearing length ratio tp, profile section level c, etc., are in accordance with those specified in GB 3505.
1 Subject content and applicable scope 2 Normative references 3 Terms and symbols 4 Surface roughness parameters 5 Surface roughness parameter values 6 Sampling length and evaluation length 7 General rules for surface roughness requirements Annex A Additional parameters for evaluating surface roughness and their values (Supplement) Annex B Surface roughness for plastic parts achieved by different processing methods and different materials (Supplement) Additional explanation
1 Subject content and applicable scope
This standard specifies the surface roughness parameters, parameter values and general rules for the requirements for plastic parts.
It is mainly applicable to the surface roughness for plastic parts of electronics, aerospace products, instrumentation and apparatus as well as other products, and is a reference for the surface roughness for plastic parts of other products.
2 Normative references
GB 131 Mechanical drawings - Surface roughness symbols and methods of indicating
GB 1031 Surface roughness parameters and their values
GB 3505 Surface roughness - Terminology - Surface and its parameters
3 Terms and symbols
Terms used in this standard, such as arithmetical mean deviation of the profile Ra, ten point height of irregularities Rz, maximum height of the profile Ry, sampling length l, evaluation length ln, mean spacing of the profile irregularities Sm, mean spacing of local peaks of the profile S, profile bearing length ratio tp, profile section level c, etc., are in accordance with those specified in GB 3505.
Contents of GB/T 14234-1993
1 Subject content and applicable scope
2 Normative references
3 Terms and symbols
4 Surface roughness parameters
5 Surface roughness parameter values
6 Sampling length and evaluation length
7 General rules for surface roughness requirements
Annex A Additional parameters for evaluating surface roughness and their values (Supplement)
Annex B Surface roughness for plastic parts achieved by different processing methods and different materials (Supplement)
Additional explanation
