What is the difference between CNC machine tools and ordinary machine tools?

The difference between CNC machine tools and ordinary machine tools is as follows:

1, meaning different

Ordinary machine tools are required in the spindle box spindle, by the motor through the belt, through the gears with different ratios of transmission torque, to achieve the processing of the workpiece.

Numerical control machine tool is a digital control machine tool, is a kind of automated machine tool equipped with a program control system. The control system can logically process the program with a control code or other symbolic instructions, and will be decoded, with a coded digital representation, through the information carrier into the numerical control device. The numerical control device sends out various control signals after arithmetic processing to control the action of the machine tool and process the parts automatically according to the shape and size required by the drawing.

2, the construction of different

Ordinary lathes with gears to change speed, need to trigger the speed change handle to change speed, CNC lathes are generally used in the CNC program to change speed. Ordinary lathes use a trapezoidal threaded screw to process threads and a light bar for cutting, CNC lathes are using ball screws. Tool holders on ordinary lathes are generally on the operator's side, most of the tool holders on CNC lathes are on the opposite side of the operator, and the tool holders on economical CNC lathes are on the operator's side.

Ordinary lathes have hard rails, and CNC lathes have hard and wire rails. Ordinary lathes have large drag plate handles, medium drag plate handles, and small drag plate handles, and CNC lathes don't have these handles and don't have small drag plates.

3, different operating efficiency

Ordinary lathes rely on gears and ordinary screw nut transmission. Due to the existence of gaps between the various moving parts, coupled with inaccurate manual operation, so the repeatability is lower. Ordinary lathe measurement needs to stop after manual measurement, measurement error is larger, and inefficient. It is suitable for small batch, not high precision requirement and zero work type parts. It has lower investment than CNC but requires higher operating skills for workers, so the wage level is high. The scrap rate and productivity of low level workers will give you a headache.

The CNC lathe adopts fully or semi-closed guards. Automatic chip removal devices are used. The spindle speed is high, and workpiece clamping is safe and reliable. Hydraulic chuck is adopted, the clamping force adjustment is convenient and reliable, and it also reduces the labor intensity of the operator. Automatic tool change is available.

Numerical control lathe are used in the automatic rotary tool holder, in the process of machining can be automatic tool change, continuous completion of multi-process processing. The main drive and feed drive of the CNC lathe adopt their own independent servo motors, which makes the transmission chain simple and reliable, and at the same time, the motors can either move separately or realize multi-axis linkage.