JPH02279252A - Simultaneous 2-axis interpolation control method with manual handle intervention - Google Patents

Abstract

PURPOSE:To enhance the manipulatability by an operator by issuing a flicker sound when the position of a tool approaches a terminal coordinate position of an obliquely or arcuately machined surface with two spindle interpolation control, and by issuing a continuous sound when it reaches the terminal point coordinate. CONSTITUTION:If a workpiece has a surface to be obliquely or arcuately machined, a table 600a is moved in the X-axis direction by, for example, an X-axis manual handle 800a in accordance with an instruction at a manipulation box 100, and a control circuit 200 causes a saddle 600b or a head 600c to follow-up move through the intermediary of a servoamplifier 300, a change-over circuit 400, and servomotors MX, MY, in accordance with a movement value detected by a scale 700a so as to machine a surface to be obliquely or arcuately machine under simultaneous two spindle control. When it approaches the terminal point of the machining by a predetermined distance thereto, a flicker sound is issued, and when it reaches the terminal point, the sound is turned into a continuous sound which is then issued. Simultaneously, a manual intervention X-axis is braked by means of a brake 900a. Thus, it is possible to enhance the manipulatability by the operator.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is characterized in that one simultaneous single-axis control device simultaneously drives each control axis via a switch for two or more drive shaft motors. Regarding the two-dimensional interpolation control method, in which the control unit of the l-axis controller performs movement control while performing other axis movement calculations in response to one axis movement by manual handle operation, the tool movement position is diagonal or circular arc machining. This is a method of notifying that the end point coordinates of a surface have been reached.

"Prior art and problems" Machine tools that have two or more control axes and a control device for simultaneous one-axis control can basically only perform straight-line cutting because of simultaneous one-axis control. When the machined surface has an oblique or arcuate portion, this has been dealt with by manufacturing a special jig or by transferring the tool to a machine tool equipped with an NG control device that has linear and circular interpolation functions.

Furthermore, as a means to eliminate the above-mentioned complexity, when cutting an oblique or circular arc part, a line segment of about 0.1 mm (x,
In the y plane, there is a method of dividing the line into X and Y axis line segments and sequentially switching each axis. In this method, the program is complicated and the cutting speed is sacrificed due to the restriction on axis switching time, so efficient cutting cannot be expected.

"Problems to be Solved and Means to be Solved" The present invention provides a simple method for simultaneous two-axis interpolation control for machining surfaces of diagonal or arcuate parts of workpieces, which is a problem in machine tools equipped with control devices for simultaneous one-axis control. The purpose of the present invention is to provide a new modified simultaneous two-axis interpolation control method.

That is, to provide a notification method in which a flicker sound is emitted from a certain position where the tool movement position approaches the end point coordinates of a diagonal or circular machined surface, and the sound is changed to a continuous sound when the tool reaches the end point coordinates.

A flicker sound is emitted from a certain position where the tool movement position approaches the end point coordinates of the diagonal or circular machining surface, the oscillation period is shortened as it approaches the end point coordinates, and the sound changes to a continuous sound when the end point coordinates are reached. Provide a notification method.

To provide a notification method for braking a manual handle intervention shaft with a brake member at a position where a tool movement position reaches the end point coordinates of an oblique or circular machining surface.

The present invention provides a notification method in which a manual handle intervention shaft is braked by a brake member at a position just before the tool movement position reaches the end point coordinates of a diagonal or circular machining surface, and the brake member is released after a predetermined time.

This makes it possible to perform diagonal cutting and circular arc cutting more rationally and accurately without overrunning the manual handle with simple uniaxial intervention of the manual handle.

"Example" Fig. 1 is a block diagram showing a control system implementing the simultaneous two-axis interpolation control method of the present invention, Fig. 2 is a diagram showing an example of diagonal cutting,
FIG. 3 is a screen diagram showing an example of screen display, and FIG. 4 is an action diagram showing the notification method of the present invention.

In Fig. 1, 100 is an operation box with a display panel for displaying positions and instructing operation procedures, and switches for data manual operation, 200 is a control unit equipped with an interpolation calculation function and a deviation counter, and 300 is a servo amplifier. Commands from 1- and each pulse encoder PEX
, PEY, and PEZ, and outputs motor driving force based on the rotational position and speed signals of the motor rotor obtained through a switch 300a that receives and switches feedback signals from , PEY, and PEZ. Reference numeral 400 denotes a switching circuit that switches and transmits command power from one servo amplifier 300 to the servo motors M X , MY , M Z of each axis, and opens and closes each relay contact by control measures from the program controller 500 .

600a, 600b, 60'Oc are tables, saddles, and heads that are movable bodies for each axis driven by servo motors MX, MY, and MZ, and their movement amounts are determined by scales (detectors) 700a, 700b, and 700c. be monitored. Each of the tables, saddles, and heads is manually operated by one manual handle 800, and their movement positions are sent from the scale to the control unit 200. 900a, 900b, and 900c are brake members for braking and clamping each axis, and the program controller 5
It is energized by a braking command from 00. Note that the program controller 500 centrally controls each member.

First, an example of diagonal cutting shown in FIG. 2 will be explained.

As shown in the figure, the workpiece W has an obliquely machined surface.

Prior to automatic operation of simultaneous one-axis control, the start point coordinates PI CXx+ yl) and end point coordinates P2 (xzyyz
) is programmed in the G code (G101), for example. The tool center coordinates at this time are P1^
, P 2A.

Next, in automatic operation with 5 simultaneous 1-axis control, machining is started from the linear machining surface (a) of the workpiece W parallel to the Y axis. and,
Before the tool approaches the tool center coordinate PIA, the controller reads G101 in advance and performs PI including tool radius correction.
Automatically calculate point A. Based on this result, when the tool reaches the tool center JIsPIA, the machine tool is automatically stopped and the screen shown in Figure 3 is displayed on the display panel of the operation box. , 104 indicates the current position of the Z axis, 104 indicates the axis to be manually intervened, and 105 indicates the direction of rotation of the handle. 106 displays the target coordinate position to be reached for the axis to be manually intervened (the next block is read in advance and the result of automatically calculating the geometric position including tool radius correction is displayed); the above display is for the Y axis. Servo motor MY automatically connects with servo amplifier 300,
This means that the table 600a should be moved to the left of the X-axis using the X-axis manual handle.

When such a state occurs, the operator slowly moves the table 600a to the left of the X-axis using the X-axis manual handle while looking at the X-axis display . . . xso, ooo on the display panel. The X-axis position feedback pulse is now sent to the control unit 200. The control unit 200 receives this feedback pulse,
The amount of movement on the Y axis to obtain the shape of the predetermined obliquely machined surface (b) is calculated, and the results are sent to the servo amplifier every moment. Therefore.

The Y-axis will be automatically controlled by a servo motor,
Since the Y-axis moves along with the movement of the manual handle on the X-axis, a predetermined composite shape "r oblique machined surface (b)" is formed. In this way, the operator continues to rotate the handle while observing the cutting state until the position display coordinates match the target coordinate position P2A. When they match, the operator pulls out the handle, presses the cycle start button, and starts the next machining surface ( C)
will move to automatic processing.

In the present invention, four methods for notifying that the L tool movement position has reached the end point coordinates of an oblique or circular machining surface will be explained with reference to FIG.

That is, the first is a notification in which a flicker sound is emitted from 2i P LX at a certain point when the tool movement position approaches the end point coordinate P2A of the diagonal or circular machining surface, and the sound changes to a continuous sound when the tool reaches the end point coordinate P2A. The second method is to oscillate a flicker sound from a certain position Plx where the tool movement position approaches the end point coordinate P2A of the oblique or circular machining surface, and
The oscillation period is shortened as it approaches 2A, and the terminal point mP
To provide a notification method in which oscillation is changed to a continuous sound at a position reaching 2A.

The third object is to provide a notification method in which the manual handle intervention shaft is braked by one of the brake members 900a, 900b, and 900c at the position where the tool movement position reaches the end point coordinate P2A of the oblique or arcuate machining surface.

Fourth, the tool movement position is the end point of the diagonal or arcuate machining surface!
At the position PBX just before reaching the g mark P2A, the manual handle intervention shaft is moved to the brake members 900a and 900b.

900c and releases the brake member at T1 after a predetermined period of time.

In the above embodiment, the X-axis is the intervention axis of the manual handle, and the Y-axis is the control axis that is automatically controlled by the servo motor. It is better to use the shaft as the intervention shaft of the manual handle. Furthermore, the same applies to the embodiment of arc cutting.

"Effects" According to the present invention, when the tool movement position is diagonal, a flicker sound is emitted from a certain position approaching the end point coordinates of the arc machined surface, and the sound is changed to a continuous sound when the end point coordinates are reached. Provided is a notification method in which the oscillation period is shortened as the sound approaches the end point coordinates, and the oscillation is changed to a continuous sound when the end point coordinates are reached.

Furthermore, there is a notification method in which the manual handle intervention axis is braked by a brake member at the position where the tool movement position has been created or the end point coordinates of the circular arc machining surface are reached, and a method in which the manual handle intervention axis is braked by the brake member at a position just before reaching the end point coordinates. This is because it provides a notification method for releasing the brake member after a predetermined period of time.

This makes it possible to more rationally and accurately perform diagonal cutting and circular arc cutting by one-axis intervention of a simple manual handle without overrunning the single manual handle. In addition, machining of diagonal or arcuate parts of the workpiece is possible.
Since it can be performed mainly by manual handle operation, the operator's unique skills can be utilized.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a control system implementing the simultaneous two-axis interpolation control method of the present invention, and Fig. 2 is a block diagram showing an example of diagonal cutting.
FIG. A and FIG. 3 are screen diagrams showing screen display examples, and FIG. 4 is an action diagram showing the notification method of the present invention. 100...Operation 3g, 200...Control unit, 300...Servo amplifier + PEX. PEY, PEZ...Pulse encoder, 300a...
・Switcher, MX, MY, MZ...Servo motor, 50
0...Program controller. 600a, 600b, 600c...movable bodies for each axis, 7
00a, 700b, 700c...Scale (detector), 800...Manual handle, 900a, 900b,
90oc...brake member, (c)...diagonal and circular cutting surface, W...work, PI (Xi? 3'i
) ...Starting point coordinates of diagonal and circular arc machining surfaces, P2 (
Xzs 3'2) ... End point coordinates of diagonal and circular arc machining surfaces, P IA, P 2A ... Tool center coordinates, T1
...Brake operation time.

Claims (4)

[Claims] (1) Drive of one of the two required simultaneous axes is directly connected to the manual handle, and the remaining one axis is directly connected to the single-axis control system, and the control unit of the single-axis control device moves the other axis in response to manual handle operation. In the simultaneous two-axis interpolation control method that controls movement while performing calculations, a flicker sound is generated from a certain position where the tool movement position approaches the end point coordinates of a diagonal or circular machining surface, and becomes a continuous sound when the end point coordinates are reached. Simultaneous two-axis interpolation control method using manual handle intervention characterized by changing oscillation. (2) Drive of one of the two required simultaneous axes is directly connected to the manual handle, and the remaining one axis is directly connected to the single-axis control system, and the control unit of the single-axis control device moves the other axis in response to manual handle operation. In the simultaneous two-axis interpolation control method that controls movement while performing calculations, a flicker sound is generated from a certain position where the tool movement position approaches the end point coordinates of a diagonal or circular machining surface, and the oscillation period is shortened as it approaches the end point coordinates. A simultaneous two-axis interpolation control method using manual handle intervention, characterized in that the oscillation is changed to a continuous sound when the end point coordinates are reached. (3) Drive of one of the required two simultaneous axes is directly connected to the manual handle, and the remaining one axis is directly connected to the single-axis control system, and the control unit of the single-axis control device moves the other axis in response to manual handle operation. In a simultaneous two-axis interpolation control method that controls movement while performing calculations, a manual handle intervention is characterized in that the manual handle intervention axis is braked with a brake member at a position where the tool movement position reaches the end point coordinates of an oblique or circular machining surface. Simultaneous two-axis interpolation control method. (4) Drive of one of the two required simultaneous axes is directly connected to the manual handle, and the remaining one axis is directly connected to the single-axis control system, and the control unit of the single-axis control device moves the other axis in response to manual handle operation. In the simultaneous two-axis interpolation control method that controls movement while performing calculations, the manual handle intervention axis is braked by a brake member at a position just before the tool movement position reaches the end point coordinates of the diagonal or circular machining surface, and after a predetermined time, the brake member Simultaneous 2 by manual handle intervention characterized by releasing the
Axis interpolation control method.