How to set the tool for parts processed by CNC lathe

The tool setting of the CNC lathe is the same as the tool setting of the ordinary lathe. The difference is that when the CNC lathe is setting the tool by hand, you need to input the input data you want in the tool compensation. For example: T0101 tool aligns the end face, then its Z axis can be set to 0, select T0101 and input Z0 in the tool compensation page.

It is better to input 2 or 3 times to avoid errors and cause tool collision. You can also set the Z axis to any number, according to your needs. T0101 aligns the outer circle, then its X axis is the size measured by the outer circle. Select T0101 and input X in the tool compensation page. The data entered by X is the outer circle size. It is best to enter it 2 or 3 times, so as not to make mistakes and cause hitting the knife. When setting the tool, if you want to retract the end face and then input the Z axis tool compensation, the tool direction can only retract the X axis, and if you want to retreat the outer circle, then input the X axis tool compensation, and the tool direction can only retract the Z axis.

For CNC lathes, the relative position of the tool and the workpiece must first be determined before machining, which is achieved through the tool setting point. The tool setting point refers to the reference point for determining the relative position of the tool and the workpiece through the tool setting. The tool setting point is often the processing origin of the part. It can be set on the processed part or the fixture and the part positioning datum have a certain size connection In a certain position.

The selection principle of tool setting point: (1) Make the programming simple; (2) Easy to align, which is convenient to determine the position of the machining origin of the part; (3) It is convenient and reliable to check during machining; (4) It is helpful to improve the machining accuracy .

When using the tool setting point to determine the machining origin, it is necessary to perform “tool setting”. Tool setting refers to the overlapping operation of “tool location point” and “tool setting point”. “Tool location point” refers to the positioning reference point of the tool. For turning tools, the tool location point is the tool tip. The purpose of tool setting is to determine the absolute coordinate value of the tool setting point (or workpiece origin) in the machine tool coordinate system, and to measure the tool position deviation value of the tool.

When multiple different tools are used to process the same workpiece, the relative coordinate value of the tool position point to the workpiece reference point is different for different tools under the condition that the tool change position is unchanged, which requires different tools to be in different It can ensure the normal operation of the program when starting processing at the starting position. In order to solve this problem, the CNC system of the machine tool is equipped with a tool compensation function. With the tool compensation function, the position deviation of each tool relative to a pre-selected reference tool is measured in advance and input to the tool parameter correction of the CNC system. In the specified group number in the column, use the T command in the machining program to automatically compensate the tool position deviation in the tool path. The measurement of tool position deviation also needs to be carried out through tool setting.

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