JPH0685131B2 - Numerical control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a numerical control device having a region processing function,
More specifically, numerical control with a function that can be used for both closed area processing and open area processing by giving only one type of input shape and attributes without providing various processing modes in area processing, pocket processing, etc. It relates to the device.

[Prior Art] FIG. 4 is a control block diagram of a conventional numerical controller, in which 1 is a CPU, 2 is a memory for storing a control program, and 3 is a machining program. A memory, 4 is a setting display board, 5 is an input interface, 6 is an output interface, and 7 is a pulse distribution circuit.

Next, the operation will be described.

The CPU 1 sequentially executes the control program previously written in the memory 2 one instruction at a time for processing.
According to this control program, the input from the machining program memory 3, the setting display board 4, etc. is read through the interface 5 to perform processing calculation, and the movement data is sent to the pulse distribution circuit 7 through the output interface 6 for pulse distribution. The circuit 7 outputs a pulse to control the movement of the processing machine.

Of these, the EIA code was used as the main information to be stored in the machining program memory 3, but recently, as shown in FIG. 5, the final shape 8 and other data such as the tool diameter have to be input. Therefore, it is equipped with a function to create a tool-centered trajectory (tool path). Therefore, the offset function calculates the tool path graphic or the offset shape based on the input graphic 8.

In the example of FIG. 5 (a), the contour shape 8 of the concave portion 11 in the rectangular closed region is cut in the work 10 by using the tool 9 such as an end mill or face mill. In this case, as shown in FIG. By calculating the coordinate position of each point P ₀ , P ₁ , P ₂ , P ₃ of the final shape 8 and programming the offset shape 11 in the order of P ₀ → P ₁ → P ₂ → P ₃ → P ₀ We are working. The machining program is executed according to the flowchart of FIG. That is, first, in step 21, the input shape is extracted for two adjacent blocks. For example, if the block of P ₀ −P ₁
P ₁ -P ₂ blocks, P ₁ -P ₂ blocks and P ₂ -P ₃ blocks, and P ₂ -P ₃ blocks and P ₃ -P ₀ blocks.

Next, in step 22, the connection mode of the two blocks is determined.
This connection mode is 3 as shown in FIGS. 7 (a) to (c).
There are some types, if the figure (a) is concave, the figure (b)
Is a smooth case, and FIG. 6 (c) is a convex case. Then, next, in step 23, a desired offset shape is created by any one of the above three types of connection modes. Finally, in step 24 it is determined whether the above input shapes are finished.

[Problems to be Solved by the Invention] However, as shown in FIG. 8 (a), for example, in the case of processing the concave portion 12 in which only one block P ₃ -P ₀ is opened to the outside, When processed by the same program as the above, a thin film 12a is formed at the open end as shown in FIG. 8 (b). Was but connexion, in conventional numerical control apparatus, when the processing of such open area, set the separate processing mode, or the program in view of the residual material of the input shape of the portion of the block P ₃ -P ₀ For example, P in FIG. 8 (b)
Trouble such set to be different from the actual final shape as _0A P ₁ -P ₂ -P _3A was necessary.

The present invention has been made in order to solve the above conventional problems, and an object thereof is to obtain a numerical control device capable of performing processing that does not cause uncut residue of a thin film at the open end at least in open area processing. And

Another object of the present invention is to obtain a numerical control device that can be commonly used for both closed area processing and open area processing.

[Means for Solving Problems] In a numerical control device according to the present invention, in a numerical control device having a region processing function, data indicating an input shape is added to represent a connection relationship of at least two adjacent blocks. Means for determining a connection relationship between the two blocks based on the added information, and a connection order of the wall and the space and a connection mode thereof when the result of the determination is a relationship between the wall and the space. It is characterized by further comprising: a means for determining the area, and a means for performing processing for creating an offset shape in which the area is an open area and an offset amount is changed according to the determined connection mode for the open end.

Further, when the means for determining the connection relationship between the two blocks determines that there is a wall-to-wall relationship, the area is defined as a closed area, and means for creating an offset shape based on the determined connection state is further included. It is characterized by

Here, as the information added to represent the connection relationship between two adjacent blocks, bit information for identifying a wall or a space can be given as an example.

[Operation] In the present invention, in addition to the data indicating the input shape, at least information for indicating the connection relationship between two adjacent blocks is added. It is possible to determine whether the relationship is between a wall and a wall or a space. Then, when it is determined that the relationship between the wall and the space is determined, the connection order and connection mode of the wall and the space are further determined, and then the region is processed as an open region. Specifically, for the open end, an offset shape in which the offset amount is changed according to the determined connection mode is created and executed. When it is determined that there is a wall-to-wall relationship, the area is processed as a closed area as in the conventional case.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a flow chart of a machining program according to an embodiment of the present invention, and reference numerals 21 to 24 are the same as those in FIG.

In FIG. 1, reference numeral 25 determines whether the connection between two adjacent blocks extracted in step 21 is a wall-wall relationship based on the bit information added to the input shape data. In the process, it is judged in combination with the following process 26. If it is determined that the walls are connected to each other, the region is a closed region, and is processed in the same manner as in FIG. 6 and processed as a closed region. The connection mode is 3 in FIG.
It is defined as one of the types.

On the other hand, if it is determined that the walls are not connected, then
In step 27, it is determined whether or not there is a wall-air relationship. If the determination is YES, the process moves to step 29 and the connection mode of two blocks is determined. On the contrary, if the judgment is NO, in step 28, the input is reversed to the space-wall and the input shapes are rearranged. Then, in the same manner as above, the process proceeds to step 29 and the connection mode of the two blocks is judged. In any case, since the area is an open area, it is determined which of the two blocks is the open end, and the input shape is determined accordingly. After that, in step 30, the connection mode is shown in FIG.
One of the three types shown in (c) is set, and the offset amount S for the open end (for example, P ₀ -P ₃ block) is changed as shown in FIG. 3 to create an offset shape. The connection mode of FIG. 2 is almost the same as that of FIG. 7, and FIG. 2 (a) shows a concave case, FIG. 2 (b) shows a smooth case, and FIG. Indicates the convex case, respectively. Furthermore, in order to judge the connection order of the two blocks, it is judged in step 31 whether it is a wall-space. After arranging in, the process moves to the final step 24.

As described above, in the present invention, in addition to the coordinate data of the input shape, only one bit information indicating a wall or a space may be added.

[Effects of the Invention] According to the present invention as described above, in addition to the data indicating the input shape, the information for indicating the connection relation of at least two adjacent blocks is added. It is possible to determine whether the block connection relationship is a wall-to-wall relationship or a wall-to-space relationship. And
When it is determined that the relationship between the wall and the space is determined, the connection order and connection mode of the wall and the space are further determined, and the region is processed as an open region, so that a thin film remains uncut at the open end. There is no such thing. When it is determined that there is a wall-to-wall relationship, the area is processed as a closed area as in the conventional case. Therefore, if the machining program according to the present invention is used, it can be commonly used for both the closed region and the open region, which is extremely convenient.

[Brief description of drawings]

FIG. 1 is a flow chart of a machining program according to an embodiment of the present invention, FIGS. 2 (a) to 2 (c) are explanatory views showing a connection mode of two adjacent blocks in the case of an open region, and FIG. 3 is an open region machining. FIG. 4 is a control block diagram of a conventional numerical control device, and FIGS. 5 (a) and 5 (b) are perspective views of a workpiece and an explanatory diagram of the offset shape in the case of closed region machining. FIG. 6 is a flow chart of a machining program of a conventional example, and FIGS. 7 (a) to 7 (c) are explanatory views showing a connection mode of two adjacent blocks in the case of a closed region, and FIG.
(A) and (b) are a perspective view of a work and an explanatory view of an offset shape in the case of open area processing. 1 …… CPU 2 …… Control program memory 3 …… Processing program memory 4 …… Setting display board 5 …… Input interface 6 …… Output interface 7 …… Pulse distribution circuit 8 …… Input shape (final shape) 9 ...... Tool 10 …… Work 11,12 …… Concave 12a …… Membrane 21 …… Means for taking out the input shape from two adjacent blocks 22 …… Means for judging the connection mode of two blocks 23 …… The offset shape is determined by the connection mode. Means for making 24 …… Means for judging whether the input shape is the end 25 …… 2 Means for judging whether the block connection is a wall-wall relationship 26 …… Waround-wall judging means 27 …… Wall-space Means for rearranging the input shape in reverse to the space-wall 29 .... 2 means for determining the connection mode of the block 30 ..... means for creating an offset shape based on the connection mode 31..determination for wall-space Means 32: Means for rearranging the offset shapes in reverse Note that, in the drawings, the same reference numerals indicate the same or corresponding portions.

Claims (2)

[Claims] 1. A numerical controller having an area processing function, wherein data indicating an input shape has information added to represent a connection relationship of at least two adjacent blocks, and based on the added information, Means for determining the connection relationship between the two blocks, means for determining the connection order of the walls and spaces and the connection mode when the result of the determination is the relationship between the wall and space, and the open end of the area as the open area. And a means for performing processing for creating an offset shape in which the offset amount is changed according to the determined connection mode. 2. When the means for determining the connection relationship between the two blocks determines that there is a wall-to-wall relationship, the area is regarded as a closed area, and means for processing to create an offset shape according to the determined connection mode. The numerical controller according to claim 1, further comprising: