JP2752783B2 - Numerical control information creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a machining process in which a post-machining shape and a pre-machining shape are input, and a single tool is used based on the post-machining shape and the pre-machining shape. The present invention relates to a numerical control information generating apparatus that automatically generates one or more of

(Prior Art) FIG. 7 is a block diagram of a conventional numerical control information creating apparatus. In FIG. 1, an input signal SA input from a keyboard by an operator is input to a data input unit 1.
The data input unit 1 converts the input signal SA into a shape S
B, the pre-machining shape SC and the machining process data SD1 are stored in the corresponding post-machining shape storage unit 3, pre-machining shape storage unit 2, and machining process data storage unit 5, respectively. The machining process generation unit 4 inputs the post-machining shape SB and the pre-machining shape SC stored in the post-machining shape storage unit 3 and the pre-machining shape storage unit 2, respectively, generates machining process data SD5, and stores the machining process data. Stored in section 5. The numerical control information creation unit 6 receives the machining process data SD6 stored in the machining process data storage unit 5 and creates the numerical control information SE. Numerical control information output unit 7
Inputs the numerical control information SE created by the numerical control information creating unit 6 and outputs it to the outside through a communication line, a magnetic disk, a paper tape, or the like.

By the way, when a post-machining shape and a pre-machining shape are input and a machining process is automatically generated based on these, the machining process directly input by an operator of the numerical control information creation device or automatically generated by the numerical control information creation device is used. The machining process changed by the operator may already be stored in the numerical control information creation device. In this case, since it is determined that a part of the processing area is cut off by the existing processing step, when the processing step is automatically generated, a processing step for processing the area that is determined to be cut off is performed. Must not be generated. An example of such a case is shown below.

FIG. 3 is a diagram showing an example of a post-machining shape and a pre-machining shape input to a numerical control information creating device for creating numerical control information for a numerically controlled lathe. FIG. 4 is a view showing an existing processing step in which a part is cut off. 3 and 4, the shape before processing is indicated by a broken line and a solid line connecting points PA, PB, PC, and PD, and the shape after processing is indicated by a solid line. FIG. 8 is a diagram showing a machining process generated by the machining process generator 4 of the conventional numerical control information creating device based on the input post-machining shape and the pre-machining shape. The shape after processing is shown by a solid line, and the shape before processing is shown by a broken line and a solid line connecting points PA, PB, PC, and PD. As can be understood from FIGS. 4 and 8, as it is, the processing step generator 4 of the conventional numerical control information generating apparatus generates a processing step of performing processing up to a region cut off by an existing processing step. . For this reason, the operator deletes the outer diameter → machining step and changes the outer diameter ← machining step in the machining steps shown in FIG. 8 to create numerical control information, or FIG. In the method of forming numerical control information by inputting again the pre-machining shape which has been changed in advance so as to remove the area shaved by the machining process shown in FIG. Either one was selected.

(Problems to be Solved by the Invention) As described above, when there is an existing processing step, it is necessary to prevent generation of a processing step for processing an area that has been determined to be removed by the step. However, the conventional numerical control information generating apparatus cannot automatically perform such generation, and the operator causes the automatic generation of the processing step to be performed once, and then the existing processing step is performed for the automatically generated processing step. Make a change so that the area that is determined to be removed by machining is not processed, or re-enter the pre-processing shape that removes the area that has been determined to be removed by the existing machining process, and then automatically generate the machining process again. I was doing it. However, these operations are very troublesome, and pose a problem of imposing a great burden on the operator.

The present invention has been made under the circumstances described above,
An object of the present invention is to automatically generate a processing step so as not to process an area that has been determined to be cut off by an existing processing step in a numerical control information creation device, when there is an existing processing step. An object of the present invention is to provide a numerical control information creation device capable of reducing the burden and burden on an operator.

(Means for Solving the Problems) According to the present invention, a post-processing shape and a pre-processing shape are input, and one or more processing steps using one tool are performed based on the post-processing shape and the pre-processing shape. The present invention relates to a numerical control information creating apparatus that automatically generates individual pieces, and the above object of the present invention is provided when machining process data for machining a part of a machining area is already stored in the numerical position control information creating apparatus.
This is achieved by providing a pre-machining shape changing unit that changes the input pre-machining shape in advance so as to remove an area shaved by the stored machining process data before automatically generating the machining process.

(Operation) In the present invention, the pre-machining shape changing unit changes the input pre-machining shape so as to remove an area that has been determined to be shaved by the existing machining process stored in the apparatus in advance. Therefore, there is no generation of a processing step for processing such an area again.

(Embodiment) FIG. 1 is a block diagram of an embodiment of a numerical control creating apparatus according to the present invention. In the embodiment shown in FIG. 1, the pre-machining shape changing unit 8 and above are the same as the respective units in the conventional numerical control information creating apparatus, and therefore the description is omitted. The pre-machining shape changing unit 8 stores the pre-machining shape from the pre-machining shape storage unit 2.
Input the SF and the machining process data SD3 from the machining process data storage unit 5, and remove the shape before machining so as to remove the area that is determined to be removed by the existing machining process stored in the machining process data storage unit 5. Change SF. When the change is completed, the pre-processing shape SF is stored in the pre-processing shape storage unit 2 again.

FIG. 2 is a flowchart showing a procedure when the pre-machining shape changing unit 8 in the present invention changes the pre-machining shape SF. First, the pre-machining shape changing unit 8 determines whether or not the shape element of the pre-machining shape before the change remains (step S1). As a result, when it is determined that there is no remaining shape element, the process is terminated, and when it is determined that there is a remaining shape element, the shape element of the pre-change shape before processing to be processed is stored in the shape before processing. It is taken out of the unit 2 (step S2).
Next, it is determined whether or not the extracted shape element of the unprocessed shape intersects with the processed shape of the processing process data (step S3). As a result, when it is determined that the extracted shape element of the unprocessed shape before the change does not intersect with the processed shape of the processing step data, the shape element of the pre-changed shape is set as the changed unprocessed shape (step S4), Step S1
Return to On the other hand, when it is determined that the extracted shape element of the pre-change shape before the change intersects with the processing shape of the data of the processing step, the distance from the starting point to the intersection of the crossed shape element of the pre-change shape before the change is changed. Pre-processing shape (step
S5). In addition, the shape element of the processing shape of the crossed processing process data from the intersection to the end point is set as the changed pre-processing shape (step S6). The shape element of the processing shape in the processing step data is extracted (step S7). It is determined whether or not the shape element of the processing shape in the extracted processing step data intersects with the pre-processing shape before the change (step S8). When it is determined that the shape element of the processing shape in the extracted processing process data does not intersect with the shape before processing before the change, the shape element of the processing shape in the extracted processing process data is set as the shape before processing after the change (step S9). Then, the process returns to step S7. On the other hand, if it is determined that the shape element of the processing shape in the extracted processing process data intersects the shape before processing before the change, the processing after the change from the starting point to the intersection of the shape element of the shape before processing in the crossed processing process data The front shape is set (step S10). Further, the end point from the intersection of the intersecting shape elements of the pre-change shape before change is set as the post-change shape (step S11), and the process returns to step S1.

FIG. 3 is a diagram showing an example of a post-machining shape and a pre-machining shape input to a numerical control information creating device for creating numerical control information for a numerically controlled lathe. FIG. 4 is a diagram showing an example of an existing processing step. 3 and 4, the shape before processing is indicated by a broken line and a solid line connecting points PA, PB, PC, and PD, and the shape after processing is indicated by a solid line. FIG. 5 is a diagram showing a pre-machining shape and a post-machining shape after change obtained by a process of removing a region shaved off by the existing machining process of the pre-machining shape changing section 8. FIG. 6 is a diagram showing a machining process generated based on the shape before machining and the shape after machining shown in FIG. 5 and 6, the shape before machining is indicated by broken lines and points PE, PF, PG, PA, PB, PC, PD, PH, PI, PJ.
, And the shape after processing is shown by a solid line. In the numerical control information creation device of the present invention, the shape before processing shown in FIG.
It is changed to remove the area that is cut off by the existing processing steps shown in the figure, and the shape before processing as shown in FIG. 5 is obtained. Based on the newly generated shape before processing, a processing step is generated as shown in FIG.

(Effects of the Invention) In the numerical control information creation device of the present invention, by providing the pre-machining shape changing unit, an area that is determined to be removed by the existing machining process stored in advance in the device is removed. The input shape before processing is changed as described above. Thus, the processing step generation unit can automatically generate a processing step that does not process an area that is cut off by an existing processing step. Therefore, the operation of changing the automatically generated processing step so as not to process the area determined to be cut off by the existing processing step, which has been performed by the operator after having once performed the automatic generation of the conventional processing step, has been performed. Or reduce the burden on the operator by automatically re-entering the pre-machining shape after removing the area that has been determined to be removed by the existing machining process and then automatically generating the machining process again. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a numerical control information generating apparatus according to the present invention, FIG. 2 is a flowchart showing a procedure when a pre-machining shape changing unit according to the present invention changes a pre-machining shape, and FIG. FIG. 4 is a diagram showing an example of a post-machining shape and a pre-machining shape input to a numerical control information creating device for creating numerical control information for a numerically controlled lathe; FIG. 4 is a diagram showing an example of an existing machining process; FIGS. 6A and 6B are diagrams showing a pre-processed shape and a post-processed shape obtained by a process of removing a region shaved off by the existing process of the process shape changing unit. FIGS. FIG. 7 is a block diagram of a conventional numerical control information generating apparatus, and FIG. 8 is a processing step generated by a processing step generator of the conventional numerical control information generating apparatus. FIG. 1 ... data input section, 2 ... shape storage section before machining, 3 ...
Machining shape storage unit, 4 ... Processing process generation unit, 5 ... Processing process data storage unit, 6 ... Numeric control information creation unit, 7 ...
Numerical control information output unit, 8 ... shape change unit before processing.

Claims (1)

(57) [Claims] 1. A numerical control information generating apparatus for automatically generating one or a plurality of machining steps using a single tool based on an input post-machining shape and a pre-machining shape. If the machining process data to be machined is already stored in the numerical control information creating device, before the machining process is automatically generated, the input is performed so as to remove an area that is cut off by the stored machining process data. A numerical control information creation device characterized by comprising a pre-machining shape changing unit that changes a pre-machining shape in advance.