Nine advantages of CNC machining
CNC systems have become an integral part of modern machining technology. "CNC" stands for Computer Numerical Control, and its principle is: the machine tool mechanism is connected to and dedicated by a dedicated digital control system. A machine operation can definitely replace manual operation. Due to the revolutionary innovation of CNC machines, CNC prototyping technology has been greatly improved. Regarding traditional and CNC machining, we have the following understanding:
An NC program is basically a list of instructions about how a machine tool handles a particular part. The NC hardware reads the ancient program line by line and tells the machine to take the appropriate action.
Now, conventional machining means that all movements of the machine are directly controlled by the operator. He chooses when to move the tool, at which feed, when to stop and where. Operators often use gauges and specialized rulers embedded in the levers for greater accuracy.
The operator of the CNC machine is safely separated from all sharp parts by means of a special protective structure. He can still see what's happening on the machine through the glass, but he doesn't need to walk anywhere near the mill or spindle. The operator also does not have to touch the coolant. Depending on the material, certain liquids can be harmful to human skin.
Now, conventional machine tools require constant attention. This means that each worker can only work on one machine. When the CNC era came, things changed dramatically. Most parts take at least half an hour to process each time they are installed. But CNC machine tools are done by cutting parts themselves. No need to touch anything. The tool moves automatically and the operator simply checks for errors in the program or settings. That being said, CNC operators find that they have a lot of free time. This time can be used for other machines. Therefore, one operator, many machine tools. This means you save manpower.
Traditional machine tools rely on operator proficiency in measuring tools, and good workers can ensure that parts are assembled with high accuracy. Many CNC systems use specialized coordinate measuring probes. It is usually mounted on the spindle as a tool and touched with a probe to determine its position. Then, determine the coordinate system zero point to minimize setting errors.
The operator must identify machining faults and cutting tools, and his decisions may not be optimal. Modern CNC machining centers are packed with different sensors. You can monitor torque, temperature, tool life and other factors while machining workpieces. Based on this information, you can refine the process in real-time. For example, you see that the temperature is too high. Higher temperatures mean tool wear, poor metal properties, etc. You can solve this problem by reducing the feed or increasing the coolant pressure. Although there are many people who say that machining is the most extensive manufacturing method today. Every industry uses machining to some degree.
5. Stable accuracy
What is more stable than a proven computer program? The movement of the instrument is always the same, since its accuracy depends only on the accuracy of the stepper motor.
6. Fewer test runs
Traditional machining inevitably has some test parts. The worker has to get used to the technique, and while doing the first part and testing new technologies, he will definitely miss something. CNC systems have a way to avoid test runs. They employ a visualization system that allows operators to physically view the inventory after all tools have been passed.
7. Complex surface processing is easier
For conventional machining, it is almost impossible to manufacture complex surfaces with high precision. It requires a lot of physical labor. The CAM system automatically forms tool paths on any surface. You don't have to put in any effort at all. This is one of the biggest advantages of modern CNC machining technology.
8. Higher cutting data
High-speed machining is possible only due to the closed cutting area. At this speed, the chip flies at high speed throughout the place. There is a coolant spray after chips because when it comes to high-speed machining, the coolant is applied under high pressure. When the speed reaches 10000 rpm or higher, manual operation is simply not possible. The cutting speed is high, and it is important to keep the feed rate and chip width stable to prevent vibration. Manual implementation is impossible and difficult.
9. Higher processing flexibility
The traditional method is that the milling machine processes the groove or plane, the lathe processes the cylinder and taper, and the drilling machine processes the hole. CNC machining can combine all of the above into one machine. Since the trajectory of the tool can be programmed, you can replicate any movement on any machine. Therefore, we have milling centers that can manufacture cylindrical parts and lathes that can mill grooves. All this reduces the setup of the part.