What Are The Benefits Of Using CNC Machine Tool Cutting Fluid?

1. Tool length compensation

The data input for CNC machining center programming requires specifying the machining center of the part in order to establish the workpiece programming coordinate system. This coordinate system is only a workpiece coordinate system, with the zero point on the workpiece. The length compensation of CNC machining center is only related to the Z coordinate, unlike the programming zero point in the X and Y planes; The tool is positioned by the spindle taper hole without changing, and the length of each tool at the zero point of the Z coordinate is different.

The CNC machining center needs to drill a hole with a depth of 50mm, and then tap a hole with a depth of 45mm. Using a 250mm long drill bit and a 350mm long tap, the drill bit is used to drill a hole with a depth of 50mm. At this point, the machining center has already set the zero point of the workpiece. When replacing the tap for tapping, if both tools start processing from the set zero point, the tap will be too long to tap due to being longer than the drill bit, causing damage to the tool and workpiece.

 If tool compensation is set, Compensate the length of the tap and drill bit. After setting the zero point of the machining center, even if the length of the tap and drill bit is different, due to the existence of compensation, the zero point Z coordinate has automatically compensated the length of the tap to Z+(or Z) when calling the tap to work, ensuring the accuracy of the machining zero point.

2. Tool radius compensation

CNC machining centers have tool radius compensation, and when programming, the diameter of the tool can be disregarded. Tool length compensation is applicable to all tools, while tool radius compensation is generally only used for milling cutters; When the milling cutter processes the outer or inner contour of the workpiece, tool radius compensation is used. When using the end face milling cutter to process the end face of the workpiece, only tool length compensation is required.

The tool radius compensation of CNC machining centers is a relatively difficult instruction to understand and use, so they are not willing to use it in programming. In fact, understanding and mastering it can bring great convenience to programming and machining; When preparing a program to process the shape of a workpiece with a milling cutter, the first step is to carefully calculate the coordinate values based on the overall dimensions of the workpiece and the radius of the tool to determine the path taken by the tool center. The tool radius used is only the radius value of this milling cutter. 

After completing the program, it is found that this milling cutter is not suitable for switching to other diameter cutters. At this point, it is necessary to recalculate the coordinate values of the path taken by the tool center, This is simply too difficult to recalculate for molds with complex shapes. The contour processing of a workpiece can be divided into rough machining and precision machining. After the rough machining program is programmed, the rough machining is completed.

After rough machining, the overall dimensions of the workpiece have changed, and the workload of calculating the center coordinates of the precision machining tool is too large; If tool radius compensation is used, the tool radius can be ignored and programmed according to the workpiece size. Then, the tool radius is used as radius compensation and placed in the radius compensation register. Temporary replacement of milling cutters or rough and fine machining can be carried out. Simply changing the tool radius compensation value can control the size of the workpiece's external dimensions, and there is basically no need to make any modifications to the program.

3. Offset compensation of fixtures

Machining center fixture offset can be used without considering the position of the workpiece fixture. When CNC machining centers process small workpieces, the fixture can clamp several workpieces at a time, without considering the coordinate zero points of each workpiece during programming. 

Simply program according to their respective programming zero points, and then use fixture offset to move the programming zero points on each workpiece; The fixture offset is executed using the fixture offset commands G54 to G59, or the coordinate system can be set using the G92 command; After one workpiece is processed, use G92 to reset the new workpiece coordinate system when processing the next workpiece.