This standard specifies the terms and definitions, structural types and dimensions, requirements, test methods, inspection rules and signs, packaging, transportation and storage of separate needle bar frames for industrial high-speed double-needle lockstitch machines. This standard is applicable to the needle bar separate needle bar frame (hereinafter referred to as the needle bar frame) with a pin positioning structure used in industrial high-speed double-needle lockstitch machines. Other structural types may be implemented by reference.
QB/T 4605-2013 Referenced Document
GB/T 2828.1-2012 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
QB/T 2505-2000 Technical conditions for blackening of sewing machine parts
QB/T 4605-2013 history
2013QB/T 4605-2013 Industrial sewing machine.Separating needle bar frame for high-speed double needle lockstitch machine