Discussion on the choice of cutting tool and cutting amount in CNC milling

With the continuous advancement of machining technology, CNC machine tools are increasingly used. In the process of programming NC programs, it is important to determine the tool and the amount of cutting, which is beneficial to improve machining efficiency and ensure processing quality.

1.Tool selection during CNC milling

First, the common types of machining tools.

The application of numerical control technology in machining can significantly improve the machining efficiency. Compared with traditional machining, CNC machining emphasizes the quality and speed of machining. It is necessary to use a computer to adjust the position of the tool so as to ensure continuous and rapid processing during the machining process. Current tools in CNC milling include milling tools and hole machining tools.

Second, the specific choice of processing tools.

The first is to ensure the processing accuracy. To ensure the accuracy of the machining, it is necessary to use a tool with high durability and sharpness, and the chip breaking ability is good. The second is to ensure the processing strength. CNC milling requires more stringent strength and requires the use of tools that meet the processing strength requirements.

The machining tool should meet two conditions. On the one hand, the computer is used to adjust the direction and strength of the machining, and the specific position of the blade. On the other hand, it is necessary to be able to cut for a long time. The specific choice should be made in the interface provided by the NC program. The staff should consider the selection of the appropriate tool according to the factors of machine tool performance, processing sequence and processing requirements. At the same time, it is necessary to consider the influence of the processing materials to ensure that the machining tool matches the machine tool specifications.

After selecting the tool, you need to further select the tool holder. Generally, the tool holder should be kept too long to avoid adverse effects on the operation of the machine. In the specific processing, the tool needs to conform to the machine specifications, and the material shape needs to conform to the machining shape. For example, a ball-end knife is required for machining curves or ball materials, and a keyway tool is required for closed keyway machining.

2.Determination of cutting amount during CNC milling

The amount of cutting in the CNC milling process is affected by the machining method. Therefore, when determining the amount of cutting, it is necessary to consider the factors such as the cutting speed, depth and feed rate. Under normal circumstances, the roughing process needs to increase the processing speed as much as possible, thereby increasing the output per unit time, so the amount of cutting during this process tends to be relatively large. The finishing process needs to improve the machining accuracy to ensure the processing quality, which requires reducing the amount of cutting.

First, determine the depth of cut. Because there are obvious differences between the machine type and the processed material, the matching work needs to be done when determining the cutting depth. When the staff determines the depth of cut, it should be cut according to specific conditions such as machining materials, machine type and machining tools. Normally, the depth of cut can be deepened during roughing, so that more material can be cut by one cut, provided that the tool stiffness is guaranteed to meet the standard, avoiding the rigidity of the tool being too low or the material thickness being too thick. There are constant problems.