3、 Specification of properties of cold heading forming oil for stainless steel sheet

(1) It has excellent extreme pressure wettability, heat resistance, extreme pressure wear resistance, antirust treatment and high temperature oxidation resistance stability. To improve the precision and smoothness of the workpiece can avoid the grinding tool calcination, and consider the multi process forming process of standard parts and non-standard parts.

(2) It can reduce the cooking fume and its "drifting fog" to a minimum, and consider the strict management of screw cap double drum core pulling rivet produced by multi process cold heading machine.

(3) It has very good performance for products with large deformation, such as hollow bolt, high strength bolt, sleeve specification, hollow and half space center bolt, etc.

(4) The heat removal effect is very good, which can prevent the high temperature of the workpiece and grinding tool in the whole process of cold forming, and reasonably maintain the punching bar and grinding tool to increase the service life.

4、 Application scope of half space center bolt

Hollow bolts are generally used in clothing, shoes and other fields. The solid core must be riveted again to connect heavy products and workpieces. It is usually not detachable. Half space center bolt is more commonly used. The bundle mouth (small end of cable diameter) is manufactured by hard cable. It can pass through thick steel plate within 0.5mm without pre hole. The bolt can not be bent and deformed. It is widely used in luggage, On the top of trunk and military luggage leather goods, the rivet hollow nail (half space center bolt) of automobile large flange is produced by copper wire. Generally, it is stipulated that it can not be split after riveting. There are many types. Now, the shaft on the top of some small toys has just begun to be replaced by half space center nail or letter nail on a large scale, which can greatly reduce the product cost. Core pulling and core striking bolts are usually used for riveting of thin and soft raw materials, and the general regulations are not strict. The materials for production and manufacturing are generally made of raw materials with good plastic deformation.