Cold heading and cold extrusion are mostly the same standard deformation production and processing, but they are slightly different in the actual operation method. Cold pier belongs to the forging deformation of small and medium-sized steel parts, which is common in the industrial production of standard parts. However, cold extrusion belongs to the extrusion deformation of large steel parts, and its application scope is relatively common.

What is cold extrusion

Cold extrusion is the production and processing method of manufacturing parts by putting the metal material hairy embryo into the cold extrusion die core, pressing the hairy embryo according to the fixed die base on the press under the indoor temperature, making the metal material hairy embryo cause plastic deformation. Obviously, the production and processing of cold extrusion relies on the abrasive to control the mobility of the metal material and a lot of migration of the volume of the metal material Of the. At the level of extrusion machine and equipment, China has the ability to design and manufacture each ton of extrusion press. In addition to the selection of chemical mechanical stamping machine, four column hydraulic press and cold extrusion press, the friction press and high-speed source energy machine and equipment have also been successfully selected for cold extrusion manufacturing.

If the embryo is extruded without heating, it is called cold extrusion. Cold extrusion is one of the processing technologies of non cutting and less cutting CNC lathe, so it is an excellent processing technology in the production and processing of metal chip plastic deformation. If the rough embryo is heated to the temperature below the working hardening temperature for extrusion molding, it is called warm extrusion molding. Warm extrusion molding still has the advantage of less and no cutting.

Cold extrusion technology is an excellent production process technology with high precision, high efficiency, high quality and low consumption, which is widely used in the industrial manufacturing of large, medium and small steel castings. Compared with hot forging and warm forging, it can save 30% - 50% of building materials, 40% - 80% of environmental protection and energy saving, improve the quality of steel castings, and improve the working environment.

At present, cold extrusion technology has been widely used in standard parts, mechanical equipment, instrument panel, household appliances, light industry, aerospace, ship, military and other industrial sectors, and has become one of the essential key production and processing methods in plastic deformation volume forming technology of metal materials. With the development of high and new technology and the continuous improvement of technical standards for goods in manufacturing industries such as small cars, motorcycles and electrical products, the technological process of cold extrusion has gradually formed the development prospect of refined manufacturing of small and medium-sized steel castings.

Cold extrusion also includes forward extrusion, reverse extrusion, composite extrusion and axial extrusion.

What is cold heading

Cold heading process is one of the new technologies of producing and processing metal materials with little or no drilling pressure. This is a kind of production and processing method that uses the plastic deformation caused by the metal material under the external force, and makes the volume of the metal material spread and migrate again with the aid of abrasive tools, and then produces the necessary parts or hairy embryo. The cold heading process is most suitable for the manufacture of anchor bolts, screws, nuts, bolts, cotter pins and other standard parts. The common machine equipment for cold heading process is special cold heading machine. If the total output is not large, it can be replaced by crank press or friction press.

Because of its high production efficiency, excellent product quality, greatly reduced raw material consumption, reduced cost and improved labor standards, cold heading technology is more and more widely used in the manufacturing of machinery and equipment, which is very standardized in the manufacturing of standard parts. Among them, the most symbolic products manufactured by multi fixture cold heading machine are anchor bolts, screws and Nut.

Is cold heading and cold extrusion one thing?

Cold pier and cold extrusion are mostly the same standard deformation production and processing, but in the actual operation method is slightly different. Cold pier belongs to the forging deformation of small and medium-sized steel parts, which is common in the industrial production of standard parts. Cold extrusion belongs to the deformation of large billets, and has a wide range of application. Cold upsetting is a branch of cold extrusion. Non cutting hexagon flange plate anchor bolt (multi fixture forming) has both cold heading and cold extrusion. The shaping and beautification of the front of the outer hexagon screw forming can only be cold heading, and the hole extrusion of the back process belongs to cold extrusion (front and back extrusion).