What is the working principle of CNC machining?

With the continuous progress of our technology, of course progress requires certain processing methods to be processed, otherwise it cannot be processed, and the same is true for CNC processing, so what is the acceleration and deceleration control of CNC processing? like?

1. Basic idea of u200bu200bflexible acceleration and deceleration control

In CNC precision machining, the system program directly realizes specific automatic acceleration Deceleration control function. In this way, it is necessary to change the acceleration and deceleration characteristics of the system or to modify the numerical control program by adding and subtracting control, so ordinary users cannot make the numerical control machine tool have the best acceleration and deceleration performance according to their own wishes. Therefore, the flexible acceleration and deceleration control method proposed by us adopts the principle of database, divides the acceleration and deceleration control into two parts: acceleration and deceleration description and implementation, and separates the acceleration and deceleration description from the system program. In the CNC system software, a general control channel independent of the content of the acceleration and deceleration database is designed, which independently completes the acceleration and deceleration calculation and trajectory control.

2. Flexible automatic acceleration control

Set the acceleration curve, analytical curve and non-analytical curve, and store them in the acceleration and deceleration curve library as a template in the form of a number table.

3. Flexible automatic deceleration control

The same as acceleration control, it is stored in the acceleration and deceleration curve library in the form of a number table as a template. Reasonable automatic acceleration and deceleration control is an important link to ensure the dynamic performance of CNC machine tools. The traditional automatic acceleration and deceleration control based on fixed curve lacks flexibility, and it is difficult to ensure that the acceleration and deceleration process is matched with the performance of the machine tool, and it is difficult to achieve the dynamic characteristics of the machine tool movement.

Each processing technology has its own working principle. If we want to know what the working principle of a processing technology is, we can only know it if we understand it. CNC machining is also one of them. CNC machining How does it work?

The control system of cnc precision machining center can generally control the automatic start and stop, reversing and speed change of the spindle at the end of the machine tool according to the digital program instructions, and can automatically control the feed speed , direction and processing route, to carry out processing, can select the tool and adjust the cutting amount and the walking track according to the tool size, and can complete various auxiliary actions required in the processing.

The CNC lathe of CNC precision machining structure is also composed of spindle box, tool rest, feed transmission system, bed, hydraulic system, cooling system, lubrication system, etc. It is only the feed system of the CNC lathe The structure of the feed system of a horizontal lathe is essentially different. The mechanical structure of a typical CNC lathe is shown in the diagram. The movement of the main shaft of the horizontal lathe is transmitted to the tool rest through the hanging wheel frame, the feed box and the slide box, and the longitudinal and transverse feed movements are ended. The CNC lathe uses a servo motor, which is transmitted to the slide plate and the tool holder through the ball screw to end the z-direction (longitudinal) and set-direction (transverse) feed motion. Precision CNC machining also has the function of various threads, and the movement connection between the rotation of the spindle and the movement of the tool holder is controlled by the CNC system.

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