JPS63250709A - Method for determining cutting direction - Google Patents

Abstract

PURPOSE:To determine a real cutting direction to be cut by an always appropriate method by determining the cutting direction from a compared result between a cutting method found out from a defining direction, a main axis rotating direction and a cutting side and a set cutting method. CONSTITUTION:After completing the input of all necessary data, a processor 11 finds out whether a cutting method is up-cut or down-cut from the defining direction FD of a contour shape CNT, the main axis rotating direction of a tool TL and a cutting side. The found cutting method is compared with an independently found cutting method appropriate for cutting, and when both the methods coincide with each other, the defining direction of the contour shape CNT is set up as a practical cutting direction and then contour working NC data are formed. Even if the contour shape is defined without considering the cutting direction, the practical cutting direction can be determined so that cutting can be attained by a cutting method appropriate for the cutting.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cutting direction determination method, in particular, without considering the cutting direction (even if a contour shape is defined, a separately set cutting method (up cut, This invention relates to a method for automatically determining the cutting direction so as to achieve a down cut.

<Prior Art> Recently, various automatic programming devices or NC devices with an automatic programming function have been put into practical use in order to easily create NC tapes (NC data).

Incidentally, conventionally, the direction in which the contour shape is defined is regarded as the cutting direction, and NC data for machining is created by moving a cutting end point tool from the cutting start point along the cutting direction.

<Problem to be solved by the invention> For this reason, even if either the up-cut or down-cut cutting method is convenient for cutting depending on the material of the workpiece, another setting must be made depending on the spindle rotation direction and the cutting side ( Depending on which side of the contour is to be cut), there is a problem in that machining using the created NC data results in machining using a cutting method that is unfavorable for cutting.

Further, when the cutting direction is determined to be a convenient cutting method and the contour is defined in that direction, it may be difficult to define the shape. That is, even if it is easier to define the contour shape in the opposite direction to the cutting direction that is convenient for cutting depending on the design drawing, this has not been possible in the past, making it difficult to define the shape.

From the above, an object of the present invention is to provide a cutting direction in which the actual cutting direction can be determined so that even if the contour shape is defined without considering the cutting direction, cutting can be performed using a cutting method convenient for cutting (up cut 1-, down cut). The purpose is to provide a method for making decisions.

Means for Solving Problems> FIG. 1 is a schematic explanatory diagram of the present invention, where CNT is a contour shape, TL is a tool, P5 is a cutting start point, and arrow FD is a contour shape definition direction.

Effect> Whether the cutting method is up-cut is determined from the definition direction FD of the contour shape CNT, the rotation direction of the spindle of the tool TL, and the cutting side (right or left side in the direction of movement) indicating which side of the contour is to be cut. , determine whether it is a down cut (if the tool TL is rotating in the solid line direction in FIG. 1, it is a down cut; if it is rotating in the dotted line direction, it is an up cut 1).

After that, the obtained cutting method is compared with a separately set convenient cutting method, and if they match, the definition direction FD of the contour shape CNT is set as the cutting direction, and if they do not match, the cutting direction is set as the cutting direction of the contour shape CNT. The direction opposite to the defined direction FD is used as the cutting direction. (Example) FIG. 2 is a block diagram of an automatic programming device capable of implementing the method of the present invention, in which 11 is a processor, 12 is a program memory for storing a control program. (ROMI
, 13 is a RAM for storing processing results, etc., 14 is a keyboard, 15 is a display device, and 16 is a data input/output device such as a disk controller.

FIG. 3 is a flowchart of the process of the present invention, and FIG. 4 is an explanatory diagram illustrating the cutting method. The method of the present invention will now be described with reference to FIGS. 1 to 4.

Based on the control program fftllrls, data necessary for contour processing is input interactively using the keyboard 14, display device 15, etc. That is, the contour shape data is input in a direction that makes it easier to define the contour shape (step 101). Note that the first point of the defined contour shape becomes the cutting start point, and the last point becomes the cutting end point.

In FIG. 1, the contour shapes CN and T are input sequentially for each block in the direction of the arrow FD from the cutting start point P5.

When the definition of the contour shape is completed, cutting side data indicating which side of the contour shape CNT is to be cut is input (step 103). Note that the cutting side indicates which side of the contour is to be cut when going from the cutting start point to the cutting end point, and in the example in Figure 1, the tool is on the left side of the contour when facing the cutting direction. The cutting side is "left".

Next, the spindle rotation direction (clockwise or counterclockwise) is input (step 105).

After inputting the rotational direction of the spindle, a convenient cutting method (up cut or down cut) is input in consideration of the material of the workpiece (step 107).

Thereafter, other data necessary for contour machining, machining conditions, tools used, cutting speed, approach method, escape method, etc. are input (step 109).

When all the data necessary to create the NC data for contour machining is input, the processor 11 inputs the definition direction FD of the contour shape CNT, the spindle rotation direction of the tool TL, and the cutting side (right or left side in the direction of movement). From this, it is determined whether the cutting method is up cut or down cut (step 111). No. ir! ! If the tool TL is rotating in the direction of the solid line (clockwise) at I, cutting is being performed as shown in Fig. 4 (a), so it is a down cut, and the tool TL is rotating in the direction of the dotted line (counterclockwise). If it is, it will be cut as shown in Figure 4 (bl), so it is an up-cut.

Thereafter, the obtained cutting method is compared with the convenient cutting method separately set in step 107 (step 113), and if they match, the defined direction FD of the contour shape CNT is set as the actual cutting direction. In step 115), if they do not match, the direction opposite to the contour shape definition direction FD is set as the actual cutting direction (step 117), after which NC data for contour machining is created.

<Effects of the Invention> According to the present invention, even if the contour shape is defined without considering the cutting direction, the actual cutting direction can be changed so that cutting can be performed using a cutting method convenient for cutting (up cut, down cut). You can decide.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the present invention; Fig. 2 1. FIG. 3 is a block diagram of the automatic back programming device, and FIG. 3 is a flow chart of the process of the present invention. FIG. 4 is an explanation of the cutting method. CNT...Contour shape, TL...Tool, P...Cutting start point, FD...Contour shape definition direction Patent applicant: Fanuc Co., Ltd. Agent Patent attorney Chiki Saito Figure 1 TL-11 Tool CNT --- Bond shape Figure 4

Claims (1)

[Claims] A cutting method in which cutting is performed from the definition direction of the contour shape, the spindle rotation direction, and the cutting side indicating which side of the contour is to be cut toward the definition direction of the contour shape is an up-cut. Compare the obtained cutting method with a separately set cutting method, and if they match, set the contour shape definition direction as the cutting direction, and if they do not match, A method for determining a cutting direction, characterized in that the direction opposite to the direction in which a contour shape is defined is set as the cutting direction.