Техническите изисквания за специални вериги включват главно следните аспекти:
Raw material quality: The raw materials used in the manufacture of special chains should comply with relevant standards. For example, the surface quality of hot-rolled materials, cold-drawn materials and other steel materials should comply with the provisions of GB/T 3077 and GB/T 3078, and their chemical composition, material size, organizational morphology and structure should meet relevant requirements.
Welding quality: The diameter of the welding part and the length of the welding area of the round link chain should be within the required range. The welding part should not have defects such as slag inclusion, burns, cracks, and depressions that affect the quality of the chain link, and burrs should be removed. The appearance inspection should be carried out before heat treatment.
Механични свойства: Механичните свойства на веригите с различни степени на качество трябва да отговарят на съответните изисквания . Например стойността на въздействието на Notch, стойността на отклонение на огъване, теста за умора и други аспекти трябва да отговарят на стандартните технически изисквания .
Quality inspection: When conducting quality inspection on round link chains, the accuracy, range and working frequency range of the instruments, equipment and measuring tools used should meet the standard requirements, and the equipment should be within the validity period of verification or calibration. The surface quality is carried out by visual inspection, and the size is measured by special measuring tools that meet the requirements.
Tensile сила и якост на умора : Якостта на опън и якостта на умора на високоякологичните прецизни ролкови вериги с висока якост трябва да отговарят на минималните изисквания за якост на опън и умора на стандартите на ISO и да се увеличат съответно с 30% и 60% .
Appearance inspection: The appearance inspection of the chain includes whether the inner/outer chain plates are deformed, cracked, rusted, whether the pins are deformed or rotated, rusted, whether the rollers are cracked, damaged, excessively worn, and whether the joints are loose and deformed.
Тези технически изисквания гарантират надеждността и безопасността на специални вериги в различни приложения .