3 design methods of CNC machining process

1.Choose a good knife path

The shortest machining path should be used while designing the CNC machining process in order to increase CNC machining efficiency. The accuracy and surface roughness of the workpiece to be treated must both be guaranteed at the same time. In this manner, both the quantity of blocks and the tool's vacant time may be decreased. For instance, the side edge of an end mill can be utilized for cutting when milling plane contour pieces on a CNC milling machine. In operation engineering, the milling cutter will produce scratches on the workpiece's surface if it cuts in the usual direction of the outside contour. Therefore, care should be taken to avoid cutting into or out of the workpiece while milling the workpiece's exterior contour. To guarantee that the workpiece's surface is smooth, the milling cutter must cut along the extension line of the outside contour curve.Pay close attention to the tool's cutting-in and cutting-out techniques while milling the workpiece's inner contour surface. To enhance the finish and machining accuracy of the inner surface of the item, the cutting-in and cutting-out points of the tool should select the arc tangential direction. Additionally, the shortest cutting route should be chosen for point group pieces when using point-controlled CNC machine tools. When the tool path is planned, the sum of the empty travel routes should be the shortest, which can reduce the number of program segments and empty space. Tool time, thereby improving the efficiency of CNC machining.

2.Arrange the processing procedures

Cutting, surface treatment, cleaning, and inspection are machining operations that have a direct impact on the machining quality of the workpiece during the CNC machining process. They also have an impact on the workpiece's machining cost and the product's production efficiency. Therefore, setting up the processing methods is crucial. The benchmarks must be uniform, the machine must operate in the least amount of time possible, and there must be a minimum number of clamping times. CAD technology may be used by designers of CNC machining processes to program the machining operation. CNC machining process designers can import the relevant process methods and process parameters into the programming system, and the programming system outputs the CNC machining information, and then performs processing and design, thereby shortening the product production cycle, optimizing the product design of the enterprise, and improving economic benefits.

3.Determine the cutting amount

In order to calculate the cutting amount, it is important to pay close attention to the spindle speed, feed speed, and relative cutting amounts associated with various processing techniques. Choose the largest possible feed amount in accordance with the part's rigidity when roughing; the largest possible back-cutting amount so that the cutting edge is cut in the inner layer; and, based on your experience during play, determine the best cutting speed within the range of speeds permitted by the machine tool manual.After roughing is finished, the quantity of back-grabbing should be calculated based on the margin; starting with the workpiece's surface roughness, a smaller feed should be chosen to ensure the precision of the machining; Use the cutting speed recommended by the cutting settings handbook. So, in order to ensure the processing quality and processing effectiveness of parts, CNC Machining Process Design Institute should be familiar with the principle of cutting consumption in CNC machining and combine it with on-site production conditions. The institute should then take advantage of the advantages of CNC machine tools to improve the economic benefits of the business.