CNC parts processing

Processing parts on an automated CNC lathe usually goes through the following steps: 1. According to the drawing and process plan of the processed parts, compile the program list with the specified code and program format, and record it on the carrier; 2. Input the program on the program carrier into the CNC unit through the input device; 3. After processing the input program, the CNC unit sends a signal to the servo system of each coordinate of the machine tool; 4. The servo system drives the moving parts of the machine tool according to the signal sent by the CNC unit, and controls the necessary auxiliary operations; 5. The relative movement between the tool and the workpiece is driven by the mechanical parts of the machine tool to process the required workpiece; 6. Detect the movement of the CNC lathe and feed it back to the CNC unit through the feedback device to reduce machining errors. Of course, there is no detection and feedback system for open-loop CNC lathes.

(1) The principle of rough first and then refined. When performing CNC machining, when dividing processes according to factors such as machining accuracy, rigidity and deformation of the parts, the processes should be divided according to the principle of separating rough and finishing, that is, semi-finishing and finishing are performed after all roughing is completed. (2) The principle of near first and far away, face first before hole. According to the distance between the processing part and the tool setting point, under normal circumstances, the part close to the tool setting point is processed first, and the part far away from the tool setting point is processed later in order to shorten the tool movement distance and reduce the idle travel time. (3) The principle of intersecting inside and outside first. For parts that have both inner surface (inner shape, inner cavity) and outer surface to be processed, when arranging the processing sequence, usually arrange the inner surface to be processed first, and then the outer surface. The inner and outer surfaces should be roughed first, and then Finishing of the inner and outer surfaces. (4) The principle of the minimum number of tool calls. In CNC machining, in order to reduce the number of tool changes and reduce the idle time, the processes and steps should be divided according to the tools used. The parts can be machined according to the method of tool concentration process. (5) The principle of the shortest path of the knife. On the premise of ensuring the quality of processing, making the processing program have the shortest path of the tool, not only can save processing time, but also reduce some unnecessary tool wear and other consumption.

For the processing of thin-walled parts, higher quality is generally required, but due to the complexity of its internal structure, it is prone to some problems during processing. Among them, thin-walled parts are susceptible to cutting force during processing, which is prone to deformation and insufficient accuracy. The deformation of thin-walled parts during processing may be caused by various factors such as blade problems, cutting force, machining heat, etc., and the deformation of thin-walled parts will affect its overall accuracy.

1. Installation location requirements: The installation location of the CNC machine tool should be far away from the source of vibration, avoid the influence of direct sunlight and heat radiation, and avoid the influence of humidity and airflow. 2. Temperature requirements: Machine tools have higher requirements for ambient temperature. Generally, exhaust fans and cooling fans are installed in the electric box of CNC machine tools to keep the electronic components, especially the central processing unit, at a certain working temperature or with small temperature changes. 3. Power requirements: CNC machine tools need electricity to operate the equipment, but generally companies that use CNC machine tools for processing are more than just one piece of equipment. There are many equipment and the power grid changes greatly when they are used at the same time, which affects the processing effect.