When the material is formed by stamping, it hardens. The hardening degree of different steels is different. Generally, the increase of 3 Ksi of high strength low alloy steel is less than 10%. Note: the yield strength of dual phase steel increases by more than 40% by 20ksi! During the forming process, the metal will become completely different, completely unlike before the stamping process begins. The yield strength of these steels increases a lot after being stressed. The higher yield stress and work hardening of the materials processed by CNC lathe are equal to the great increase of flow stress. —-This results in the need for more tonnage to make parts – it increases the deformation temperature of the metal (which may burn or destroy improper lubricants), hard spots increase die wear – and the coating may not help or last as long as expected. To sum up, the high pressure requirements of high strength steel forming, the increase of springback, the increase of processing hardness and the operation under high forming temperature pose challenges to the die and lubrication.
In the past, in the production of deep drawing or re punching parts, everyone thought that pressure resistant (EP) lubricating oil was the best choice to protect the mold. Sulfur and chlorine EP additives have been mixed into pure oil to improve mold life for a long time. However, with the emergence of new metal high strength steel and strict environmental protection requirements, the value of EP oil-based lubricating oil has decreased or even lost its market.
What are the characteristics and functions of CNC lathe precision machining? It is an automatic machine tool controlled by program. The control system can logically process the program with control code or other symbol instructions, and decode it by computer, so that the machine tool can perform the prescribed action, and the blank can be processed into semi-finished products by cutting tool.
Traditional mechanical lathe processing is manual operation of ordinary machine tools. When lathe processing, the machine tool is shaken by hand to cut metal, and caliper and other tools are used to measure the accuracy of products. Modern industry has long been using computer digital control machine tools for operation, and any products and parts can be processed directly according to the program prepared by technicians in advance.
The information is stored on the information carrier (such as magnetic disk, perforated paper tape, magnetic tape, etc.) in a certain format, and then read in by the CNC system on the machine tool (or input directly through the keyboard of the CNC system, or through the communication mode). By decoding the information, the lathe can process the action and parts, and the modern CNC machine tool can process parts It is a typical product of mechatronics and the technical foundation of new generation production technology and computer integrated manufacturing system.
The development trend of modern CNC lathe precision machining is high speed, high precision, high reliability, multi-function, compound, intelligent and open structure. The main development trend is to research and develop intelligent full-function universal CNC device with open structure in both software and hardware. CNC technology is the foundation of machining automation and the core technology of CNC machine tools. Its level is related to the national strategic position and the level of national comprehensive strength. It develops with the development of information technology, microelectronics technology, automation technology and detection technology. CNC lathe precision machining is a kind of CNC machine tool with tool library and automatic tool change, which can carry out a variety of processing operations on the workpiece in a certain range.
CNC lathe precision machining is the use of CNC technology to control machining machine tools, or equipped with CNC system. Computer gong processing uses CNC machine tools to process mechanical parts, known as CNC processing. NC machining is different from ordinary machine tools. CNC machining needs control information, such as tool feeding, the sequence of various actions, and various auxiliary functions (such as soil shaft speed, speed, tool change, coolant switch, etc.), etc. the program is stored in the control in digital form, and the automatic machining machine tool is realized through digital control device.
CNC lathe precision machining is an efficient automation tool. Dongguan CNC machining center is a typical electromechanical product, which can realize high-speed machining, high precision and high degree of automation. Mechanical parts processing is an important difference from other types of automatic machine tools: CNC machine tools use flexible automation technology, that is, when the processing object changes, in addition to clamping parts and replacement tools, only need to change the processing program can automatically find out new parts, without changing other hardware equipment.
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