JPS6327902A - Numerical controller - Google Patents

Abstract

PURPOSE:To quickly and surely generate a desired outline curve by providing a control means which selects outline elements, which are designated by a position input means, from outline elements displayed on a graphic display device to generate the outline curve. CONSTITUTION:Data inputted from a keyboard device 4 is stored in a storage device 5 in a numerical control part 2, and the outline curve is displayed on a display device 3 based on data supplied from the device 5 and a designating signal of a soft key device 6. Positions of desired outline elements out of outline elements of the curve displayed on a display screen 3a of the device 3 are designated by a light pen device 11 as the position input means. The control part 2 recognizes positions designated by the device 11 and stores them as a pattern forming the outline curve and erases the other patterns from devices 5 and 3. A machine tool 1 with ATC performs the working of the extent of outline cutting along the selected and displayed outline curve.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a numerical control device suitable for application to the metal processing field of cutting press molds, plastic molds, etc. This invention relates to a numerical control device that simplifies data creation in a numerical control system that creates contour curve data for contour cutting.

[Prior Art] In this type of numerical control device, it is necessary to perform many contour milling operations by moving a tool such as an end mill along a contour curve made up of a combination of straight lines and circular arcs.

Conventionally, a device described in Japanese Patent Publication No. 127950/1980, for example, is known as a device for creating contour curve data for contour cutting in an interactive manual format.

As shown in FIG. 5, this device has a configuration in which a display device 3 is connected to a numerical control section 2 of a machine tool thief 1 equipped with an ATC, and a keyboard device 4 is also connected. The data is stored in the storage device 5 in the numerical control section 2, and a contour curve is displayed on the display W3 based on the data supplied from the storage device 5. Furthermore, a soft key device 6 for inputting various data to the numerical control section 2 is attached to the display device 3.

As shown in FIG. 6, the soft key device 6 has the following information:
The display device 3 has a signal generation function corresponding to the symbol displayed at the bottom of the screen, and when the operator presses a soft key corresponding to the symbol, the signal of this soft key is transmitted to the numerical control section 2. There is.

In such a conventional numerical control device, for example, the seventh
The case of creating the contour curve 7 shown in the figure will be explained.

It is assumed that the contour curve 7 is formed by a starting point at point A, a straight line from point A to point B, and a circular arc C rotating clockwise from point B to point C. That is, straight lines and circular arcs C are contour elements that constitute the contour curve 7. The contour curve 7 is created and created in the following steps.

(1) Select the symbol S7 (FIG. 6) pointing to the upper right by pressing the soft key.

(2) Coordinate values (xa, ya) of point A from the keyboard device 4
), and the coordinate values (xb, yb) of point B.

(3) The numerical control unit 2 creates a straight line connecting points A and B, and displays this on the display device 3.

(4) Press the soft key to select Nonpol SL, which indicates an arc rotating clockwise.

(5) Coordinate values of point C (xc', y
c), and the value of the radius R of the arc C.

At this point, only the two points B and C and the radius R are known, so
Circle c1 shown in FIG. Among c2, there are two circular arcs rotating in the clockwise direction, ■ and ■, and it cannot be determined as one.

Therefore, in order to obtain the contour curve 7 shown in FIG. 7, the operator must assume the trajectory group shown in FIG. 8 and input another condition. That is, in order to distinguish between the circular arcs (■) and (2), it is necessary to manually enter a condition for determining whether the door angle of the circular arc is larger or smaller than 180° using the keyboard device 4 or the soft key device 6.

(6) Input the condition that the Ω angle of the arc C is smaller than 180°.

(7) Arc C in FIG. 7 is created and displayed.

The above example shows a case where a conversion point where the line type changes from a straight line to a circular arc or from a circular arc to a straight line, such as point B of the contour curve 7, is known. Such a simple contour curve 7
However, the operator is required to make sophisticated judgments as described in item (5) above.

Next, there is more shown in the 9th shaku! ! This will be explained by taking the rough contour curve 8 as an example. In the figure, L2 is a straight line passing through the dot and parallel to the y-axis, C3 is a circular arc with radius R3 centered on the dot, and L3
is a straight line of angle θ that touches the arc c5 at its leftmost point H, C
4 is an arc with radius R4 that touches both arc c3 and straight line L3, C5 is an arc with radius R5 centered on point J, and L4 is point I.
It is a straight line that passes through and is parallel to XNI, and moreover, it becomes a contour element constituting the contour curve 8. In addition, the arc c
As shown in Figure 4, an arc whose center position is unclear and which touches two helix segments is called an insertion arc. Furthermore, in the following description, a -circle and a circular arc forming a part thereof are indicated by the same reference numerals.

Here, the intersection point E1 of the point D1, the straight line L2, and the circular arc c3 is the circular arc c.
5 and the straight line L4, and the coordinate values of the center J of the circular arc c5 are known. On the other hand, the two circular arcs c3, the contact point F1 of C4, the contact point G between the circular arc c4 and the straight line L3, and the straight line L3
The contact point H between and the arc c5 is an unknown point that cannot be known from the diagram. However, by performing algebraic calculations in the numerical control section 2 based on the constraint conditions obtained from FIG. 9, the coordinate values of these points F, G, and H can be determined.

When the above algebraic operation is executed, for example, the arc c3 and the straight line L
As shown in FIG. 10, the circle with radius R4 that is in contact with
Of the two intersections between the straight line L3 and the circular arc c3, four are formed near the lower intersection, and four are formed near the upper intersection (not shown). Figure 10 shows the lower 41m1 circles c4 and C4.
b, only C4C and C4d are shown.

Now, in FIG. 9, the tool 9 is moved along the contour curve 8,
Consider moving the points in the order of D→E-+F→G→H→I. The operator uses the keyboard device 4 and soft key device 6 shown in FIG. 5 to create the contour curve 8 in the following steps.

(1) Select the symbol S5 (FIG. 6) indicating the direct downward direction by pressing the soft key.

(2) Coordinate values of point (Dx, Dy), coordinate value of point E (E
X.

Enter Ey).

(3) A straight line L2 connecting the dot and point E is created and displayed on the display device 3.

(4) Press the soft key corresponding to symbol S2 in the counterclockwise direction to select this symbol S2.

(5) Input data corresponding to the circle c3, that is, radius R3 and center coordinates (DLDy) from the keyboard device 4.

(6) Select symbol S2 in the counterclockwise direction.

(7) Input data and radius R4 corresponding to circle c4.

At this time, the question ``Does this circle touch the previous figure?'' is displayed on the display device 3, and the user answers in the affirmative. Note that the previous figure means circle c3. , also the coordinates of point F! ! (Fx, Fy) are unknown at this point.

(7a) In order to supplement the condition (7) above, it is manually determined that the arc PC to be selected is an arc that turns left when crossing from circle c3 to 04 and is smaller than I80゛ (
(See Figure 10).

(8) Select non-port s7 pointing to the upper right.

(9) Input the distortion θ of the straight line L3. At this time, the question ``Does this straight line touch the previous figure?'' is displayed on the display device 3, and the user answers in the affirmative. Here, the figure of one building means circle c4.

Also, at this point, the coordinate values of point G (G x, G y
) is unknown.

(10) Select non-pol Sl indicating clockwise direction.

(II) Input data corresponding to circle c5 in FIG. 2, namely, radius R5, center coordinate values (Jx, Jy), and end point coordinate values (rx, Iy). Also, the previous figure L3
The condition of being in contact with is input by affirmative response.

(Ila) To supplement the condition (11) above, input that the arc HI is an arc that turns right when crossing from the straight line L3 to the circle c5 and is smaller than 180°.

It is difficult for an operator to discover the conditions added in (7a) and (lla) above without making a mistake. Therefore, whether or not the condition added in (7a) is correct cannot be determined at the time of its input, and becomes clear only in (11). Therefore, operators are often forced to backtrack or redo items that were previously manually performed.

[Problems to be Solved by the Invention] As described above, in conventional numerical control devices, when a contour element cannot be uniquely determined, a desired contour element is selected and determined from among a plurality of contour elements. This was extremely difficult.

The present invention was made against this background, and an object of the present invention is to provide a numerical control device that can immediately determine desired contour elements.

[Means for Solving the Problems J] In order to solve the above problems, the present invention forms contour elements based on data input manually from a data input means,
The contour elements are sequentially connected to create a contour curve, and a processing operation such as contour cutting is given along this contour curve. In the apparatus, a position input means for specifying a position on a display screen of the graphic display device;
All contour elements satisfying the data input from the data input means are displayed on the graph ink display device, and a contour specified by the position input means is selected from among the contour elements displayed on the graphic display device. The present invention is characterized by comprising a control means for selecting an element and creating the contour curve using the selected contour element.

[Operation] According to the above configuration, all contour elements obtained by algebraic operations from known conditions are displayed on the display device. A desired contour element is designated from among these contour elements using a position input means such as a light bar or a mouse, and is immediately selected. be able to.

[Example code] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram showing the configuration of a numerical control device according to an embodiment of the present invention. This device differs from the conventional device shown in FIG. 5 in the following points.

■Light pen device 11 (position input means) in numerical control section 2
was added so that the position on the display device 3 can be specified.

- The numerical control unit 2 recognizes the figure designated by the Wright Ben device 11 among the displayed plural figures and stores it as a figure forming the contour curve, while storing the other figures in the storage device 5 and the display device. Delete from 3.

Here, as shown in FIG. 3, the display screen 3a of the display device 3 has 12x pixels in the horizontal direction (X direction) and 12x pixels in the vertical direction (y direction).
It has 12y pixels. In addition, in the storage device 5, each of the pixels 1, 2, 3...n, n+1...
(A display screen storage area 5a (FIG. 4) consisting of addresses corresponding to lx-Qy is provided, and the display data stored in addresses la and ry is converted to the display screen 3a. is now displayed.

Next, the operation of this embodiment will be explained by taking as an example the case where the contour curve 8 shown in FIG. 9 is created.

(1) Select the symbol S5 (FIG. 6) indicating the direct downward direction by pressing the soft key.

(2) Coordinate values of point (DX, Dy), coordinate value of point E (E
x.

Ey) and select the display screen memory area 5a corresponding to the dot.
The address Id of and the address re of the display screen storage area 5a corresponding to the point E are determined. Next, at L/S I d, I d+12x, I d+ 2 (lx=
-I el,: Display data indicating the existence of a figure is written. By converting this display data and displaying it on the display screen 3a, a straight line L2 is drawn on the display screen 3a.

(3) A straight line L2 connecting the dot and point E is created and displayed on the display device 3.

(4) Press the soft key corresponding to symbol S2 in the counterclockwise direction to select this symbol S2.

(5) Input data corresponding to the circle c3, that is, radius R3 and center coordinates (Dx, Dy) from the keyboard device 4.

(6) Select symbol S2 in the counterclockwise direction.

(7) Input data and radius R4 corresponding to circle c4.

At this time, the question ``Does this circle touch the previous figure?'' is displayed on the display device 3, and the user answers in the affirmative. It should be noted that the single moe figure means circle c3. Also,
The coordinate values (F x, F y) of point F are unknown at this point.

(8) Select symbol S7 pointing to the upper right.

(9) Input the slope θ of the straight line L3. At this time, the question ``Does this straight line touch the previous figure?'' is displayed on the display device 3, and the user answers in the affirmative. Here, the previous figure means circle c4.

Also, at this point, the coordinate values of point G (G x, G y
) is unknown.

(10) Select the symbol Sl indicating clockwise direction.

(11) Data corresponding to circle c5 in Fig. 2, that is,
Input the radius R5, center coordinate values (JX, Jy), and end point coordinate values (Ix, ry). Further, the condition that the figure is in contact with the previous figure L3 is inputted by an affirmative response.

Note that (1) to (11) above are the same as when creating the contour curve 8.

(12) When the operations up to (11) above are performed, among the figures in FIG. 2, the straight line L2, circle c3, circle c5, straight line L3, and L, 3a are displayed.

Here, the circle c3, the circle c5, and the straight line L3 are also 2 points',
It is displayed in the same way as the straight line L2 connecting E.

That is, addresses on the display screen storage area 5a corresponding to these figure trajectories are determined, display data indicating the existence of figures is written to the addresses, this display data is converted and displayed, and the figures are displayed on the display screen. Drawn on 3a. Note that at this point, other shapes, that is, circle c4,
c4 b, c4 c, c4 d, c4 e.

c4 f, c4 g, and c4 h are not displayed.

(!3) The operator uses the light ben device 11 to select the straight line L3. That is, when the operator presses the light receiving part of the light pen device 11 against a point on the straight line L3 on the display screen 3a, one pixel on the display screen 3a is determined,
Address I of display screen storage area 5a corresponding to this pixel
Q is determined. The numerical control unit 2 performs a comparison calculation to determine which point on the displayed figure this address corresponds to. This determines that the address IL is part of the straight line L3. In this way, the numerical control unit 2 recognizes that the straight line L3 is a straight line that constitutes the contour curve 8, and
3a from the storage device 5 and display device 3.

At this stage, the numerical control unit 2 sends the display device 3 a circle c4,
c4 b, c4 c, c4 d, c4 e, c4 f,
Newly add and display c4 g and c4 h.

(I4) The operator uses the light pen device 11 to select the smaller arc PC of the circle c4. This selection is carried out in the same manner as the selection of the straight line L3 described in section (I3) above. That is, the address In of the display screen storage area 5a corresponding to one point on the arc FG is determined, and this address In is determined.
The arc F'G including the arc F'G is determined as a result of the comparison operation. This results in circles c4 b, c4 c.

c4 d, c4 e, c4 f, c4 g, c4 h are deleted, and the smaller arc FC1 straight line L2, arc c3,
A straight line L3 and a circular arc c5 remain on the display screen of the display device 3.

By the above operations, the contour curve 8 shown in FIG. 9 is completed.

In the above embodiment, the light pen device W, 11 is used as the position input means, but this is not intended to be considered. For example, it is possible to move a cursor displayed on the screen of a display device using a keyboard device, a mouse, etc., and move the cursor over a desired figure to select it.

[Effects of the Invention] As explained above, the present invention forms contour elements based on data input manually from a data input means, connects the contour elements one after another to create a contour curve, and If a processing operation such as contour cutting is given along the contour curve,
A numerical control device capable of displaying an in-plane contour curve on a graphic display device, comprising a position input means for specifying a position on a display screen of the graphic display device, and data input from the data input means. All contour elements are displayed on the graphic display device, and a contour element designated by the position input means is selected from among the contour elements displayed on the graphic display device, and the selected contour element is used to form the contour. Since the present invention includes a control means for creating a curve, even if there are two or more outline elements (solution figures), the operator can visually check and select the desired outline element on the display device. As a result, without interrupting work or performing trial-and-error operations,
Moreover, it does not require any geometrical knowledge from the operator.
A contour curve can be created quickly and reliably.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an outline of a numerical control device according to an embodiment of the present invention, FIG. 2 is a diagram for explaining a method of creating a contour curve using the same numerical control device, and FIG. A conceptual diagram showing the configuration of the display screen 3a, FIG. 4 is a storage device 5
FIG. 5 is a schematic diagram showing the outline of a conventional numerical control device;
FIG. 6 is a diagram showing an example of the soft key device of the same device, and FIG.
The figure shows the contour curve 7, FIG. 8 shows two possible contour elements cl and c2 in the contour curve 7, FIG. 9 shows the configuration of another contour curve 8, and FIG. 1O shows the contour. curve 8
FIG. 4 is a diagram showing four possible contour elements. 2... Numerical control unit, 3... Display device, 4... Keyboard device, 5 - Storage device, 6... Soft key device (4.6 above is data input means), 7, 8. Contour curve , 9... Tool, 11... Light pen device (position input means).

Claims (1)

[Claims] A contour element is formed based on the data input from the data input means, the contour elements are sequentially connected to create a contour curve, and machining operations such as contour cutting are instructed along this contour curve. In a numerical control device capable of displaying a contour curve on a graphic display device, a position input means for specifying a position on the display screen of the graphic display device, and a position input means for specifying a position on the display screen of the graphic display device, and all contours satisfying the data input from the data input means. The elements are displayed on the graphic display device, and a contour element designated by the position input means is selected from among the contour elements displayed on the graphic display device, and the contour curve is adjusted by the selected contour element. A numerical control device characterized by comprising: a control means for creating.