CNC lathe tool is an important skill in processing, the accuracy of the tool determines the machining accuracy of the parts, the efficiency of the tool directly affects the machining efficiency of the parts, the machining operation of the tool is very important.
CNC lathe boot, must be back to zero (reference point) operation, its purpose is to establish CNC lathe position measurement, control, display of a unified benchmark, that is, the tool back to the origin of the machine tool, the origin of the machine tool usually in the maximum positive stroke, its position is determined by the machine tool position sensor.
After the machine tool back to zero, the position of the tool (tip) and the distance from the origin of the machine tool is fixed. Therefore, for the convenience of the tool and processing, the position of the tip of the machine tool back to zero is regarded as the origin of the machine tool. Tool setting is the operation process of establishing the workpiece coordinate system in the machine coordinate system of CNC machine tool, and making the origin of the workpiece coordinate system coincide with the origin of programming.
The distance between the programming point of the tool tip in the machine tool coordinate system and the origin of the machining direction X and Z is measured by the trial cutting or non-contact method, and the value is set in the machine tool parameters. The workpiece coordinate system is established through the program call. The absolute coordinate value of the base point in the program is based on the origin of the established workpiece coordinate system, and the contour of the parts is processed.
Nc lathe tool is an important skill in processing, the accuracy of the tool determines the machining accuracy of the parts, the efficiency of the tool directly affects the machining efficiency of the parts, the machining operation of the tool is very important.
CNC lathe boot, must be back to zero (reference point) operation, its purpose is to establish CNC lathe position measurement, control, display of a unified benchmark, that is, the tool back to the origin of the machine tool, the origin of the machine tool usually in the maximum positive stroke, its position is determined by the machine tool position sensor.
After the machine tool back to zero, the position of the tool (tip) and the distance from the origin of the machine tool is fixed. Therefore, for the convenience of the tool and processing, the position of the tip of the machine tool back to zero is regarded as the origin of the machine tool. Tool setting is the operation process of establishing the workpiece coordinate system in the machine coordinate system of CNC machine tool, and making the origin of the workpiece coordinate system coincide with the origin of programming.
The distance between the programming point of the tool tip in the machine tool coordinate system and the origin of the machining direction X and Z is measured by the trial cutting or non-contact method, and the value is set in the machine tool parameters. The workpiece coordinate system is established through the program call. The absolute coordinate value of the base point in the program is based on the origin of the established workpiece coordinate system, and the contour of the parts is processed.
Try to cut the knife
This method is simple and convenient, but it will leave cutting marks on the workpiece surface, and the tool accuracy is low. Taking the cutter point (here coexisting with the origin of the workpiece coordinate system) at the center of the workpiece surface as an example, the two-sided cutter setting method is adopted.
Gauge, standard mandrel, block gauge tool setting method
This method is similar to the test cutting tool method, only when the tool spindle does not rotate, add feeler (or standard mandrel, block gauge) between the tool and the workpiece, in order to feel the feeler can not be freely pumping as the standard, pay attention to calculate the coordinates when this should be the thickness of the feeler. Because the spindle does not need to turn the cutting, this method will not leave marks on the workpiece surface, but the tool accuracy is not high enough.
Using edge finder, eccentric rod and shaft setting tool method
The procedure is similar to using the test cutting tool set method, except that the tool is replaced with a side finder or eccentric bar, which is the most common method. High efficiency, can ensure the accuracy of the tool. Care must be taken when using the edge finder to make the ball part slightly in contact with the workpiece. At the same time, the workpiece to be processed must be a good conductor and the positioning datum surface has a good surface roughness. Z-axis setters are generally used for transfer (indirect) tool setting.
Transfer (indirect) knife technique
Processing a workpiece often need to use more than one knife, the length of the second knife and the first knife loading length is not the same, need to re to zero, but sometimes the zero is processed, can not directly find the zero, or do not allow the destruction of the surface has been processed, and some tools or occasions are not good direct to the knife, this time can use indirect change method.
Point countercutting
Dial indicator (or dial indicator) tool setting
Dial indicator (or dial indicator) tool setting method (generally used for round workpiece tool setting)
Special tool setting tool setting method
The traditional tool method has poor safety (such as the gauge to the knife, hard hard knife tip is easy to crash), occupy the time (such as the test cut need to cut several times), the random error brought by the human shortcomings, has not adapted to the rhythm of CNC machining, more conducive to play the function of CNC machine tools. The special tool has the advantages of high precision, high efficiency and good safety, which simplifies the tedious work of ensuring the tool by experience and ensures the high efficiency and high precision of NC machine tools. It has become an indispensable special tool for solving the tool on NC machining machine.