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CNC machining refers to the automatic control of machining tools and 3D printers by computers. A CNC machine processes a raw material (metal, wood, plastic, ceramic, composite, etc.) without human intervention according to a written program.
CNC is a material reduction manufacturing process that typically uses computer control and machine tools to turn billets into custom-designed parts. The process is suitable for a variety of materials, including metals, plastics, wood, glass, foam and composites, and is used in a variety of industries, such as large CNC machining, telecommunications parts and prototypes machining, and aerospace parts machining, which requires stricter tolerances than in other industries.
Material reduction manufacturing process(such as CNC machining), is often contrasted with additive manufacturing processes (such as CNC machining) or molding processes(such as liquid injection molding). Material reduction manufacturing process removes layers of material from the workpiece to produce custom shapes and designs, while additive process assembles layers of material to produce the desired shapes and molding process deforms and displaces raw materials into the desired shapes. The nature of automation of CNC machining enables the production of high-precision parts in mass production, bringing up cost-effectiveness. Although CNC machining shows some advantages over other manufacturing processes, there are limits to the sophistication that part design can achieve and the cost-effectiveness of producing complex parts.
1. It is forbidden to touch the tool tip and iron filings with your hands. The iron filings must be cleaned with iron hooks or brushes.
2. It is forbidden to touch the rotating spindle, workpiece or other moving parts by hand or in any other way.
3. It is forbidden to measure and change the speed during the processing, let alone wipe the workpiece with cotton silk, nor clean the machine tool.
4. During the operation of the lathe, the operator shall not leave the post, and the machine tool should stop immediately when abnormal phenomena are found.
5. Check the bearing temperature frequently. If it is too high, you should find relevant personnel for inspection.
6. During the processing, it is not allowed to open the protective door of the machine tool.
CNC machining is a manufacturing process suitable for a variety of industries including motor vehicle manufacturing, aerospace product and parts manufacturing, construction and agriculture. A wide range of products such as automotive frames, surgical equipment, aircraft engines, gears can be made with CNC process. Milling and turning are two common mechanical CNC machining operations.Vvvv
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Metal (such as aluminum, brass, stainless steel, alloy steel, etc.), plastic (such as PEEK, PTFE, nylon, etc.), wood, foam, composite materials.
The choice of the best material for CNC manufacturing applications depends largely on the specific manufacturing application and its specifications. Most materials can be processed as long as they can withstand the processing process, that is, they have sufficient hardness, tensile strength, shear strength, and chemical and temperature resistance.
The workpiece material and its physical properties are used to determine the optimal cutting speed, cutting feed rate and depth of cut. The cutting speed is measured in surface feet per minute and is the speed at which a machine tool can cut into or remove material from a workpiece. Feed rate (in inches per minute) measures the rate at which the workpiece is fed to the machine tool. Depth of cut is the depth at which the cutting tool cuts into the workpiece. Typically, the workpiece will first go through an initial phase where it is roughed into an approximate, custom-designed shape and size, and then proceed to the finish phase, where it undergoes slower feed rates and shallower cuts to achieve more accurate and precise cut depths.
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