Process: Wire pickling—annealing (depending on the fasteners used, the wire may be drawn directly)—pickling (washed to remove oxide scale, etc.)—wire drawing—formed on the cold heading machine—in the thread rolling Thread rolling on the machine --- heat treatment (generally no heat treatment for level 6.8 and nut level 8 and below) --- electroplating (according to customer requirements)-packaging-shipment

Cold heading: It is the use of the plasticity of metal, and the use of cold mechanics for pressing or cold drawing to achieve the purpose of solid metal deformation. (Basic definition)

A casting method that thickens the top of a bar or wire at room temperature. Cold heading is mainly used to manufacture parts such as bolts, nuts, nails, rivets and steel balls. The material for forging blanks can be copper, aluminum, carbon steel, alloy steel, stainless steel, titanium alloy, etc., and the material utilization rate can reach 80-90%. Cold heading is mostly carried out on a dedicated cold heading machine, which is convenient to complete successive, multi-station, and automated production. Cutting, heading, accumulation, forming, chamfering, thread rolling, diameter reduction and trimming can be completed in sequence on the cold heading machine. The production efficiency is high, up to more than 300 pieces/min, and the diameter of the cold-headed workpiece is 48 mm. The process of cold heading bolts implies that the picture shows a typical process of cold heading bolts. The multi-station nut active cold heading machine is a multi-station nut active cold heading machine. The bar material is actively fed to a certain length by the feeding organization, and the blocking organization is blocked into a blank, and then the clamp is transferred to the accumulation and punching station for forming.

In fact, the current production technology level is relatively complete, but this does not mean that there is no room for increased demand for locks. In order to become a trustworthy fastener manufacturer, fastener manufacturers are developing on this road Difficulties will continue to increase, which is also a test.