Analysis of Calculating Method of Bias of Knife Cutter Point on CNC Lathe

In order to facilitate the knife, in the numerical control turning process, the tool is usually set with the imaginary tip P point. If there is no tip radius compensation, undercut will occur when turning cones or arcs. When the part requires high accuracy and has a cone or arc, the solution is: calculate the center of the arc radius of the tool nose, and then click this to calculate the local compensation.

To compensate for the tool position caused by the radius r of the tool tip when turning the surface. When tool position compensation is performed in the Z direction and X direction at the same time, the actual blade contact point with the workpiece moves to the tool tip set point P during programming. The compensation amount of r can be calculated by the following formula: In this case, the base point coordinate is the compensation amount (Dz and DX) of the base point coordinate (Z and X) of the workpiece contour plus the radius of the tip arc, which solves the problem of no tip radius compensation.

In NC machining, because the tool tip has a circular arc, the contour of the workpiece is formed by the tool motion envelope. Therefore, the motion path of the tool point is not coincident with the contour of the workpiece. In the full-function CNC system, its tool compensation command can be applied. According to the workpiece contour size, it is convenient to program and process. In the economical numerical control system, the trajectory of the tool location can be calculated according to the workpiece contour size, tool, etc., and programming can be done according to the method of local compensation.

Cnc Machining refers to Machining of metals with CNC Machining tools and tools.CNC index-controlled machine tool is programmed by CNC machining language, usually G code.CNC machining G code language tells CNC machine tool machining tool to use what cartesian position coordinates, and control the feed speed of the tool and spindle speed, as well as tool converter, coolant and other functions.CNC machining has great advantages over manual machining, such as CNC machining parts are very accurate and repeatable;CNC machining can produce parts with complex shapes that manual machining cannot complete.

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