JPS6310208A - Setting method for entry inhibiting area - Google Patents

Abstract

PURPOSE:To set an entry inhibiting area by dividing this area into plural rectangular areas and at the same time giving the jog feed to a tool to set at the diagonal corner of each rectangular area and storing the present position of the tool. CONSTITUTION:An entry inhibiting area CHK is divided into rectangular areas EIN1-3. Then a tool TL undergoes to jog feed and is set the diagonal corner parts A/B, C/D and E/F of each rectangular area in an entry area inhibition area setting mode. The present position of the TL is stored when the TL is set at a corner part. In such a way, an entry inhibiting area is set. While an area CHK' is divided into rectangular areas EIN1'-3' and the TL is positioned with jog feed in case the entry inhibiting area is changed to CHK' from CHK after the change of the diameter of a work WK and then jaw position of a chuck. Then the diagonal corners A/B, C'/D' and E'/F' are stored to set an entry inhibiting area.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for setting a prohibited area in numerical control, and particularly to a method for easily setting a prohibited area.

<Prior art> In the machine tool area, there is a maximum movable area in which the movable parts of the machine can move, and if the moving parts move beyond this area, the movable parts will collide with the fixed parts of the machine tool area, causing damage to the machine tool. . For this reason, a stroke limit is set either in hardware or software at the boundary of the movable region of each axis, and it is constantly checked whether the movable part exists within the movable region. When the movable part moves beyond this area, an overtravel signal (alarm signal) is generated, and the NG device immediately brings the movement of the movable part to an emergency stop upon generation of the "I=" signal.

Further, machine tools have areas where movable objects cannot enter even within the maximum movable range, such as the chuck portion and tail stock portion of a lathe.

Now, once the maximum movable area is determined, it will not change thereafter, but the prohibited area changes for each machining process, for example, for each workpiece. That is, the position of the jaws of the chuck changes depending on the diameter and length of the workpiece, or the position of the tail stock changes, and as a result, the prohibited area changes.

For this reason, conventionally, each time the entry-prohibited area changes, the coordinate values of several points for specifying the entry-prohibited area are measured with a measuring device, and the coordinate values are input from a keyboard in the MDI device.

<The problem that the invention is trying to solve> However,
There is a problem in that it is troublesome and inefficient to measure the prohibited area with a measuring device and input it from the keyboard.

In particular, this problem becomes apparent in machine tools where entry prohibited areas frequently change depending on the size of the workpiece.

In light of the above, an object of the present invention is to provide a method for setting a prohibited area that allows a user to set a prohibited area in a simple manner.

〈Means for solving problems〉 FIG. 1 is a schematic explanatory diagram of the present invention.

In the figure, TL is a tool, CHK and CHK' are chuck areas, which are prohibited areas, and WK and WK' are workpieces.

Further, EINI to EIN3 and ErN2' to ElN3' are divided areas of the prohibited area and have a rectangular shape. EINl corresponds to the stationary part of the chuck, EIN2.
EIN3 and EIN2'.

EIN3' corresponds to the jaw part of the chuck.

Function> Transforms the prohibited area CHK into a large number of rectangular areas EINI~EtN
3 (Fig. 1 (A)). Then, in the no-entry area setting mode, jog feed the tool TL to two diagonal corners (A, B, C, D; E
, F), and store the current tool position when the tool is positioned at each corner, thereby setting a prohibited area.

Then, the diameter of the workpiece changes (Fig. 1(A)).

(Refer to (B)) If the chuck jaw position changes and the prohibited area changes (changes to CHK-CHK'), the prohibited area CHK' is divided into multiple rectangular areas EINI, EIN2.
', EIN3' (Fig. 1(B)) and positioning by jog feed allows the diagonal corners (A, B, C') of each rectangular area to be divided.

D';E',F'), and thereby set a prohibited area.

<Example> v! Figure J2 is a block diagram of the NC device that realizes the present invention.
FIG. 3 is a flowchart of a process for setting a prohibited area according to the present invention.

In FIG. 2, 11 is a processor, 12 is a control program memory (ROM), and 13 is a battery-backed RAM, which includes an NC data storage area 13a, a prohibited area storage area 13b, a processing result storage area 13c, and another storage area 13d. are doing.

14 is a CRT 14a and a data input section (keyboard) 14
15 is an NC data input device that reads from the NCC deck external storage medium NCT and transfers and stores it in the NC data storage area 13a of the RAM 13;
6 is an operation panel, and 17 is an axis control section.

Although not shown, the shaft-side adding section 17 has a pulse interpolator, a servo circuit for each axis, etc., and when the path is controlled by the NCC deck or the path is controlled by pressing the jog feed button, the processor 11 calculates the amount of time per unit time ΔT. The amount of movement ΔX and Δ2 of each axis to be moved in between is input, a well-known pulse distribution calculation is performed based on the amount of movement ΔX and ΔZ to generate a distribution pulse, and the movement of each axis is controlled based on the distribution pulse. I do.

Reference numeral 18 is an interface circuit that controls data exchange between the NC device and the machine tool area, and 19 is a machine tool weave.

The processing of the method of the present invention will be explained below with reference to FIGS. 1 to 3.

(11 First, operate the switch provided on the CRT & MD I device 14 to enter the prohibited area input mode.

Note that the switch may be provided on the operation panel 16.

(2) As a result, the processor 11 displays the coordinate values of each rectangular area constituting the prohibited area on the CRT 14a.

For example, the storage area 13b of the RAM 13 is a prohibited area (
(See CHK in Figure 1) into a rectangular area (EIN1 to EIN3
), the diagonal corner (A
, B; C, D; E, Fl, the processor 11 reads the coordinate values from the RAM 13 and displays them on the CRT&MD. However, RAM 13
If the coordinate values specifying the prohibited area are not stored, nothing will be displayed.

Note that although the process of modifying a part of the prohibited area and the process of newly setting a prohibited area are slightly different from those in C, the following description will be made assuming that the new area is newly set.

(3) Then, make it 1-1.

(4) After the rotation, use the mode changeover switch on the operation panel 16 to set the jog feed mode, and operate the ±X-axis or ±Z-axis jog feed buttons to jog the tool. It is positioned at the corner of one rectangular area that constitutes the prohibited area.

Note that when the +X-axis or -X-axis jog feed button is pressed, the processor 11 calculates the amount of movement ΔX to be moved in ΔT seconds using the following formula % (where F is the jog feed speed). Next, ΔX is input to the axis control unit 17 to control the movement of the tool in the X-axis direction, and the current position of the tool is updated using the following formula. On the other hand, +Z axis or -
When the Z-axis jog feed button is pressed, the processor 11 calculates the amount of movement Δ2 to be moved in ΔT seconds using the following formula %. Next, ΔZ is input to the axis control unit 17 to control the movement of the tool in the ±Z axis directions, and the current position of the tool is updated using the following formula 2 (%). Furthermore, x, , Z, .

ΔX, ΔZ, etc. are stored in the processing result storage area 13C of the RAM 13.

(5) Once the tool is positioned at one corner of the rectangular area, the coordinate value setting key provided on the CRT&MD I device 14 is pressed.

(6) As a result, the processor 11 (the current tool position)
X, , Z, ) are stored in the prohibited area storage area 13b of the RAM 13 as the coordinate values of one corner in the rectangular area that constitutes the prohibited area.

(71 Then, the processor 11 checks whether !=2.

(8) Then, if l≠2 (i=1), i + 1→
1, and the processing from step (4) onwards is repeated.

(9) On the other hand, if 1=2, it means that one rectangular area has been set, and it is checked whether there is another rectangular area to be set from now on, and if it exists, step (3) is performed for that area. The subsequent processing is repeated, and if it does not exist, the processing is completed.

The above example deals with setting a new prohibited area, but in order to modify part of the already set prohibited area, the coordinate values of the diagonal corners of each rectangular area are displayed in step (2). In this state, use the cursor to specify the rectangular area to be modified, and then input the new t: corner coordinate value using the method described above.

<Effects of the Invention> According to the present invention, the prohibited area is divided into a plurality of rectangular areas, the tool is jog-fed to be positioned at a diagonal corner of each rectangular area, and the current position of the tool at that time is memorized. Because I configured it to set a no-entry area,
A prohibited area can be set in a simple way.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of the present invention, FIG. 2 is a block diagram of an NC device implementing the present invention, and FIG. 3 is a flowchart of the processing of the present invention. TL...Tool, CHK, CHK',, approach M Ih area, WK1
WK'...Work, EINI~ETN3, EIN2'~EIN3'...Divided area of prohibited area, Patent applicant: Fananoku Co., Ltd. Agent, Patent attorney Chiki Saito Figure 1 (B) 'Ej#I-E //VJ*E/A/1=EI/V3-m
-yf'AI"t-Figure 2

Claims (1)

[Scope of Claims] A method for setting a prohibited area in a numerical control device, which sets a prohibited area for movable objects and outputs an alarm when the current position of the movable object enters the prohibited area. Divide the area into many rectangular areas, and jog the tool to move the two diagonal areas of each rectangular area.
A method for setting a prohibited area, the method comprising: setting a prohibited area by positioning the tool at two corners and storing the current position of the tool at that time.