Processing principles of CNC machining center

Defining the machining route

The machining route of the CNC lathe feed refers to the path that the turning tool travels from the tool setting point (or fixed machine origin) until it returns to this point and completes the machining program, including the cutting path and non-cutting operations such as tool entry and exit. Empty travel path.

The feed route for finishing is mainly carried out sequentially along the contour of the workpiece. Therefore, the main focus when defining the feed route is on determining the feed route for roughing and idle cutting.

When machining on a CNC lathe, defining the machining route generally follows the following principles.

① The accuracy and surface roughness of the workpiece should be guaranteed.

② Make the machining route as short as possible, reduce the idle time on the way, and improve the machining efficiency.

③ Try to simplify the numerical calculations and machining procedures.

④ Subroutines should be used for some reusable programs.

Advantages and disadvantages

CNC machining has the following advantages:

① The number of tools is greatly reduced, and complex tooling is not required to process parts with complex shapes. If you want to change the shape and size of the parts, you only need to modify the part processing program, which is suitable for the development and modification of new products.

② The processing quality is stable, the processing accuracy is high, and the repeatability is high, which can adapt to the processing requirements of aircraft.

③ The production efficiency is high in multi-variety and small-scale production, which can shorten the time of production preparation, machine adjustment and process control, and the cutting time is shortened by using the optimal cutting amount.

④ It can process complex surfaces that are difficult to process with conventional methods, and even process some parts that cannot be observed.

The disadvantage of CNC machining is that the machines and equipment are expensive and require high-level maintenance personnel.