At the beginning of nc machine tool, the aircraft parts with complex surface are selected as the processing objects to solve the difficult key of common processing methods. The biggest characteristic of nc machining is to use perforated tape (or tape) to control the machine tool for automatic machining. Due to the different characteristics of aircraft, rocket and engine parts, the zero of aircraft and rocket, the large size of components and the complex shape of the plane and rocket are all different. Zero engine, small component size, high precision. Therefore, the CNC machine tools used by aircraft, rocket and engine manufacturing departments are different. In the manufacture of aircraft and rocket mainly by large continuous control of CNC milling machine, and is used in engine manufacturing continuous control of nc machine tools, also USES the position control of nc machine tools, such as CNC drilling machine, CNC boring machine, machining center, etc.).
Numerical control machine tools are usually equipped with tool holder and tool bank that can be changed automatically. Process concentration brings huge economic benefits:
Robot machine covers less area and saves workshop.
This saves time and manpower by reducing or eliminating intermediate steps (such as intermediate checks of semi-finished goods, temporary handling, etc.).
Nc machine tool processing, no manual control tool, high degree of automation. The benefits are clear.
The requirements of the operation worker are lowered:
A senior worker of ordinary machine tool, not a short period of time can be cultivated, and a don't need programming nc workers training a very short time (such as numerical control lathe work need to a week, will write simple processing program). Moreover, the parts produced by the CNC machine tool are more accurate and time saving than those processed by the common machine tool. This reduces the labor intensity of the workers: CNC workers are excluded from the processing process most of the time and are very labor-saving.
The quality of products is stable: the automation of nc machine tools eliminates the fatigue, carelessness, estimation and other human error of workers on ordinary machine tools, and improves the consistency of products.
High machining efficiency: the automatic tool changing of nc machine tool makes the process compact and improves labor productivity.
Flexibility is high
Traditional universal machine tools, although flexible, but low efficiency; However, although the traditional special plane has high efficiency, it has poor adaptability to parts, strong rigidity and poor flexibility, so it is hard to adapt to frequent product changes caused by fierce competition in the market economy. As long as the program is changed, new parts can be processed on the nc machine tool, and it can be operated automatically, flexible and efficient, so the nc machine tool can adapt to the market competition well.
Machine tools can accurately process various contours, some of which cannot be processed on ordinary machine tools. CNC machine tools are especially suitable for the following occasions:
1. No scrapped parts.
2. New product development.
3. Processing of urgently needed parts.
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