The difference between a Swiss type CNC automatic lathe and a traditional CNC lathe



A Swiss type CNC automatic lathe and a CNC lathe, they are similar lathe machines,Get more news about Swiss-type Lathe Machining,you can vist our website!
but did you know they are completely different?
In this edition, we will introduce the 4 differences between the cutting tools used based on the mechanical structure of Swiss CNC automatic lathes and CNC lathes.
We are good at machining a large amount of parts from bar stock material. It is automatically continuously machined, like candy, until the material is exhausted.
Machining is performed by moving the cutting insert on the X axis and the workpiece on the Z axis.
Since the guide bushing supports the workpiece and machining is done near the guide bushing, which eliminates workpiece “vibrations” or “deflections”. Therefore, the machine is perfect for manufacturing thin and long workpieces. It is ideal for machining parts with tight tolerance requirements, such as motor parts.
The material diameters of as small as “φ1.0 mm” (.040 inch) can also be machined successfully.
The material is grasped one by one with a chuck and machined. The workpiece is installed and removed by a person or robot.
The cutting tool machines moves on the X axis and the Z axis.
Because it chucks according to the shape of the workpiece, the range of the parts that can be processed is wide.
It is possible to machine parts that have been shaped to some extent, such as after forging and casting materials.
Swiss-type CNC automatic lathes machine workpieces that are smaller in diameter and require higher precision than machining on a CNC lathes. High cutting resistance causes “vibration” and “dimensional defects”, so using a “positive insert” with a relief angle to reduce cutting resistance and achieve stable machining.
The table above compares the “M” class commonly used on CNC lathes with the “G” class and “E” class commonly used on Swiss SNS automatic lathes. The 3rd letter in the insert part description identifies the tolerance class. Insert such as CNMG… and DNMG… have an M class tolerance. On the other hand, inserts such as DCGT… and CCGT… have a G-class tolerance.

As shown in the table, the insert tolerance is very different between the “G” and “M” class. Corner length (m) and insert IC (dia. D1) tolerance affect the accuracy of the cutting edge position, or workpiece dimensions. Thickness tolerance (S1) affects the height of the cutting edge. Swiss-type CNC automatic lathes require high precision machining of small diameter workpieces, so “G-class” or “E-class” with higher tolerance than M-class are used. Also, the upper and lower insert surfaces of G-class and E-class inserts are polished and the outer edges are ground with high accuracy which achieves excellent sharpness.