Hard Turning refers to the turning of hardened steel as a final machining or finishing process to avoid the commonly used grinding techniques. Turning is the most basic, extensive and important process in machinery manufacturing, which directly affects production efficiency, cost, energy consumption and environmental protection.
Our products also include CNC Turning, which refers to the process method of digitally controlled lathe processing. On the basis of traditional lathes, CNC systems and drive systems are added to form CNC lathes; there are also CNC Milling, which is a processing technology that uses Rotate the tool to remove the excess part of the material block until the desired customized shape is formed; there is also Electrical Discharge Machining, which refers to the electrical erosion of the workpiece through the pulse discharge between the tool electrode and the workpiece electrode in a certain medium. There is also Hard Turning which refers to the turning of hardened steel as a process method for final machining or finishing to avoid the commonly used grinding technology. If you want to know more, welcome to consult us, we will serve you wholeheartedly!
Due to the development of modern science and technology, various high-strength and high-hardness engineering materials are more and more used, and traditional turning technology is incompetent or impossible to process some high-strength and high-hardness materials. Hard turning technology makes this possible and yields clear benefits in production. Hardened steel usually refers to the workpiece material with martensitic structure after quenching, high hardness, high strength, and almost no plasticity. 
When the hardness of hardened steel is >55HRC, its strength sb is about 2100-2600N/mm2. Usually, the workpiece has been roughed before heat treatment and hardened, and only finishing is carried out in the hardened state. Fine grinding is the most commonly used processing technology for finishing, but its narrow processing range, large investment, low production efficiency, and easy environmental pollution have always plagued the economical and efficient processing of hardened steel. With the development of processing technology. It has become possible to replace grinding with hard turning, and has achieved obvious benefits in production. 
Using polycrystalline cubic boron nitride (PCBN) tools, Ceramic Tools or coated Carbide Tools, etc. to cut hardened steel (55~65HRC) on a lathe or turning center. Hard turning has higher performance than grinding. Processing efficiency, and its energy consumption is 1/5 of ordinary grinding. Hard turning often adopts large cutting depth and high workpiece speed, and its metal removal rate is usually 3 to 4 times that of grinding. 
In turning, a variety of surface processing (such as outer circle, inner hole, and groove, etc.) can be completed in one clamping, while grinding requires multiple installations. Therefore, the auxiliary time is short and the position accuracy between the machined surfaces is high. . 
In most cases, coolant is not required for hard turning. In fact, the use of coolant can adversely affect tool life and surface quality. Because hard turning is formed by annealing and softening the material in the sheared part, if the cooling rate is too high, the effect caused by the cutting force will be reduced, thereby increasing mechanical wear and shortening tool life. At the same time, hard turning can save the device related to the coolant, reduce the production cost, simplify the production system, and the formed chips are clean and easy to recycle.
