JPS61233807A - Automatic programming generating device - Google Patents

Abstract

PURPOSE:To confirm easily the coincidence with an inputted processed graphic data by using an optical reader so as to read a graphic comprising straight lines and curves drawn on a drawing paper sheet thereby displaying the result. CONSTITUTION:A worker defines a working graphic corresponding to a material to be worked based on a component drawing inputted to an NC machine. The graphic consists of straight lines circular arcs and they define the working graphic. Then the worker loads the component drawing to an optical reader 24 and a keyboard 9 inputs an instruction. Then a picture read head 39 starts scanning and reads sequentially the graphic data of the component drawing. Thus, the working graphic and the graphic read by the optical reader 24 are displayed overlapping to confirm the coincidence between both the graphics.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic programming creation device equipped with a graphic display device that graphically displays the locus of movement of a tool relative to a workpiece, that is, the tool path.

[Conventional technology]

To create a machining program for a numerical control device using an automatic programming creation device, you must input the machining shape you want to machine from the keyboard according to the part drawing and define the machining shape.
All you need to do is input and define the tool path that instructs the machining path based on the defined machining geometry, and add auxiliary function commands, and the machining program is automatically generated. be done. However, the operator must check whether the machining figure has been input correctly.In conventional equipment, the machining figure and the NC data of each block of the generated machining program are sequentially displayed on the figure display device. However, the operator had to check each block by comparing it with the component drawing, which was very troublesome.

Furthermore, the processing figure must be defined as a set of straight lines and circular arcs. rfh# other than arc! In order to define a machined figure having a shape, the curve of the machined figure must be divided into many segments, approximated by circular arcs or straight lines, and input, which is a task that only an expert can do. In particular, wire-cut electrical discharge machines often machine molds, and many of the molds have complex shapes with 9 curves, making it difficult to input and confirm machining figures (this has been a problem).

[Problem that the invention seeks to solve]

The present invention was made to solve the above-mentioned problems, and it is possible to read figure data directly from a part drawing, input machining figure data, and confirm that the input machined figure data matches the part drawing. The purpose of the present invention is to provide an automatic programming creation device that is extremely easy to create.

[Means for solving problems]

Therefore, according to the present invention, in an automatic programming creation device equipped with a graphic display device that displays the relative movement locus of the tool to the workpiece according to the machining program of the numerical control device as a graphic, straight line and ry
An automatic programming creation device characterized by comprising an optical reader that reads a figure composed of rtt+m as drawing data, and means for displaying the read r:, drawing data and ri as a figure on the figure display device. provided.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic programming creation device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of the embodiment, and FIG. 2 is a perspective view showing the external appearance of the embodiment.

The common path 2 connecting to the central processing unit (cpu>i) has
Memo 13 for continuous use in which the basic program is stored, memory 4 in which control data is stored. Waving memory for temporarily storing processed data 5. An NC data memory 6° for storing created NC data is connected to a disk memory 8 via an interface 7. disk memory 8
A large number of created NC machining programs are saved. A keyboard 9 comprising alphabet keys, tlLfm keys, etc. is connected to the common path 2 via an interface 10 and transmits key information to the central processing unit 3!11ra1. *
Further, the interface 10 is directly connected to the interrupt fin 11, and issues an interrupt signal to request interrupt processing when a key is operated. A graphic attenuator W113 is connected to the common path 2 via an interface 12.

Graphic display wave fl! 13 is a cathode ray type display (C
RT)14. Its control circuit 15. Graphic/Mori 1
6. A character generator 17 and a fresh memory 18 are provided. Graphic memory 16 stores all pixels of one screen of display 14. The character generator 17 is comprised of a read-only memory and stores character shapes.
The +77 retoucher memory 1B has a storage area corresponding to the number of characters that can be displayed on one screen of the display 14, and has a storage area corresponding to the number of characters that can be displayed on one screen of the display 14.
For example, character information to be displayed at addresses corresponding to 25 rows x 80 columns is stored. The control circuit 15 stores data from the central processing unit W11 in the graphic/memory 16 and the 7-receiver memory 18, sends a video signal from the pixel data from the graphic memory 16 and the character generator 17 to the display 14, and displays figures and characters. indicate.

In addition, in order to output the created NC machining program,
An input/output interface 7ace 20 for directly transferring NC data to the NC device and an output interface 23 for outputting to the magnetic tape 21 or tape puncher 22 are connected to the common path 2, respectively.

An optical reader 24 that reads figures drawn on the drawing as drawing data is connected to the common path 2 via an interface 25.

Figure 3 shows optical reading e! FIG. 4 is a side view, and FIG. 5 is a block diagram.

A driver shaft 31 whose both ends are supported by the frame (not shown) of the optical reader 24 is disposed parallel to a support drum 33 that feeds and controls the drawing 32, and whose end is connected to a DC motor 34 and driven to rotate. A spiral cam groove 35 is carved on the outer peripheral surface of the driver shaft 31. Holder 36
Its base end is movably supported by an id pongee 37 disposed in parallel with the support drum 33 at the lower front side of the driver shaft 31, and a locking piece 38 formed on the rear surface of its tip end is movably supported. It is fitted and supported in the spiral cam groove 35. (Then, the F driver m31
4, the holder 36 is rotated by the spiral cam @
35 and the locking piece 38, reciprocating in the left-right direction along the guide 37.

The image reading head 39 is attached to the front surface of the tip of the holder 36, with its front surface facing the drawing 32 on the support drum 33. The reading head 39 is therefore mounted on the holder 3.
As G moves, the figures described in the drawing 32 are sequentially read in the horizontal direction.

The DC motor 34 that rotationally drives the driver shaft 31 is controlled by a microcomputer 40 built into the optical reader 24 via a motor drive circuit 41, and is driven to rotate at a constant speed. Then, the rad 3 to read the image.
9 is moved back and forth in the left and right direction at a constant speed.

A rotary plate 42 is fixed to the end of the driver shaft 31,
A large number of slits 43 are arranged at equal angular intervals on the concentric circumferential surface.
is transparent. In order to detect the passage through the slit 43, a light-emitting wire 44 made of a light-emitting diode and a 4! The light-receiving elements f are arranged opposite to each other with the rotary plate 42 in between. Each slit 43 is connected to the image reading head 3.
9 is a slit for detecting the timing of passing the reading point, and the interval between the slits 43 is determined by the relationship between the rotating speed of the slit and the moving speed of the head 39, that is, the slope of the spiral cam @35. has been done.

The image reading radar 39 has four reflective optical sensors R1 on the front surface of the image reading radar 39 as shown in FIG. 5, for example.
-R4 are arranged in a row at equal intervals in a direction perpendicular to the moving direction of the pad 39, that is, the reading direction. The light emitting elements L1 in each row correspond to each optical sensor R1 to R4.
In order to sequentially read each of the reading points D1 to D4 illuminated on ~L4, the detection signal of each optical sensor is sent to the amplifier A1, and the comparator C1 determines whether the reading point is white or black, and C "0".
Or the microcomputer 4 as the picture 'R information of "1"
Send to 0.

The micro combinator 40 is connected to the motor drive circuit 4
In addition to outputting a drive control signal to the light emitting element 44 and a drive control signal to the light emitting element 44, it also determines the movement position of the radar 39 for image reading based on the detection signal of the light receiving element 45, and determines which sensor R1 to R4 is currently being moved. The pixel information at the reading point is sequentially read, and the central processing unit (
i! Data is sent to 1.

The operating procedure for creating a machining program will be briefly explained.

6 and 7 are image diagrams showing examples of graphic display on the display 14. FIG.

First, an operator defines a machining figure corresponding to a workpiece based on a part drawing. In this embodiment, a wire-cut electric discharge machine is assumed as the target machine, and the machined figure is a two-dimensional figure. The figure is composed of straight lines and arcs,
First, all the positions of the points serving as break points are defined, and then straight lines or circular arcs connecting these points are sequentially defined to define the processed figure. For example, in the example shown in Fig. 6, based on the part drawing, the positions of five points po, pi, ...P4 that will be the break points are input from the keyboard 9, and then the straight line of the figure is set as the starting point. Define the arc by specifying the end points (for example, Pl and P2) with the graphic cursor, specify the start point P4 and the end point PO with the graphic cursor, and then set the center point of the arc to either the left or right of the straight line from the start point P4 to the end point PO. The radius is defined by specifying with the graphic cursor whether the radius is on the side of , and inputting the radius from the keyboard 9.

Next, the worker inserts the part drawing into the optical reader 8!24,
Input a Read Graph command from the keyboard 9. Then, the image reading head 39 starts scanning and sequentially reads the graphic data of the component drawing. And display 1
4. You will be asked [5CALE=J, so enter the scale of the figure drawn on the part drawing, for example, "1" if it is the original size.0 Next, on the display 14, enter [5CALE=J].
You will be asked that TOLERANcE=J, so enter an appropriate tolerance, for example, [0.2J if it is 0.2+m.

Then, on the display 14, as shown in the tJST diagram, the processed figure input and defined from the keyboard 9 and the figure read from the part drawing by the optical reader 8!24 are displayed superimposed, and the mismatched parts of the two figures are identified. Displayed in red. What is determined and displayed as a mismatch is a line segment that deviates by more than the previously set tolerance (0.2 m). In the example in Figure 7, the arc from point P4 to PO is displayed in red as a mismatch point.
The four line segments up to 4 are displayed in green as matching locations.

Next, the operator reads out the input data corresponding to the mismatched part, checks it, and corrects it. In the example of FIG. 7, the input data for the radius of the arc from APA to PO was incorrect, so it must be corrected.

Then, the operator sequentially inputs a small value into the tolerance (TOLERANCE) and displays the discrepancy.

If there are no errors in the input data corresponding to the discrepancies,
The discrepancy was detected as a distortion in the drawing of the part, and all the input data defining the machining figure was entered correctly! t can be done. In this way, the operator can easily compare and confirm the input data and the component drawing.

Based on the machining shape that has been input as described above and has been confirmed to match the part drawing, the machining program is automatically started by defining the tool path (cutter path) and adding the necessary auxiliary function commands. generated.

A specific process for displaying a mismatch between the processed figure inputted from the prefix keyboard 9 and the figure directly inputted from the optical reader 24 according to the operating procedure described above will now be described.

FIG. 8 is a 70-chart showing the actual processing. First, in steps 201 and 202, drawing data is read from the optical reader R24, and the read drawing data is stored in the memory 5.Next, in step 203, the stored drawing data is converted to a specified scale. Next step 20
At step 4, input from the keyboard! Parallel and rotational movement is carried out so that the machined figure and the figure read from the drawing (hereinafter referred to as the drawing figure) coincide with each other.This process is carried out as follows.

(1) Calculate and find the position of the center of gravity of the processed figure and the drawing figure.

(2) Translate the drawing figure in parallel so that its center of gravity matches the center of gravity of the processed figure.

(3) Rotate and move the drawing figure around its center of gravity to a position where the 81% difference from the processed figure is the smallest.

(4) Translate and rotate the drawing figure by a minute amount,
Search and find the position where the length of the line segment that overlaps and matches the processed figure is the longest.

Then, in step 205, the processed figure and the drawing figure are superimposed and displayed on the display 14.Next, in step 20
At step 8, 207, a location where the deviation between the two figures is greater than or equal to a specified tolerance (roL+:uANcE) is determined, the location is changed to red and displayed, and the process is terminated.

In the above-described embodiment, a process for inputting and defining a machining figure from the pre-caulking keyboard 9 and confirming the match between the machining figure and the figure in the part drawing has been explained, but precise dimensional accuracy is not required. For the workpiece, the machining figure is not defined numerically from the keyboard 9, but by optical reading @2.
Of course, it is also possible to create a machining program using the figure of the part drawing taken from Ia from 4 as the basic machining figure.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to directly read the figure data from the 19 part drawings, and it is extremely easy to input the machining figure data and to confirm that the input machining figure data and the part drawing match. It has excellent effects.

[Brief explanation of the drawing]

Figures 1 through 8 show an embodiment of the automatic programming creation device of the present invention, in which Figure 1 is a block diagram, Figure 2 is a perspective view, Figure 3 is a wedge-hole diagram of an optical reader, and Figure 4 is a diagram. is a side view, FIG. 5 is a block diagram, FIGS. 6 and 7 are image diagrams showing graphic display examples, and FIG. 8 is a diagram showing actual processing.
-It is a chart. 1... Central processing unit (CPU), 3-6... Memory, 8... Disk memory, 9... Keyboard, 13
...Graphic display! ! Placement, 14...Display (CR
T), 16...Graphic memory, 17...Character generator, 19...NC device, 24...
Optical reading device, 32... Drawing, 39... Image reading head. Written by Isamu Goto, agent and patent attorney - Figure 4 Figure 5

Claims (1)

[Scope of Claim] An automatic programming creation device equipped with a graphic display device that graphically displays the locus of movement of a tool relative to a workpiece according to a machining program of a numerical control device, comprising straight lines and curves drawn on a drawing. What is claimed is: 1. An automatic programming creation device comprising: an optical reader that reads graphics as drawing data; and means for displaying the read drawing data as graphics on the graphics display device.