JPH05285785A - Offset amount control device for compound working machine - Google Patents

Abstract

PURPOSE:To set offset amt. corresponding to a change in the shape of a frame due to a change in outside air temp. by providing very simple constitution. CONSTITUTION:A compound working machine is provided with a punch press mechanism 1, a laser head 2, and a work feed table device 3. A beam-like frame part 5a for generating a change in shape due to a change in the outside temp. of a laser working machine frame 5 is provided with a temp. measurement means 20 comprising a thermocouple. There is provided a thermal displacement offset correction means 27 for correcting the offset amt. of work feed corresponding to the temp. measurement result. The correction means 27 comprises an offset connection means 24 used in switching punch working to laser working in NC equipment 21, and a thermal displacement offset arithmetic means 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset amount control device for a multi-tasking machine having a punch press mechanism section and a laser head.

[0002]

2. Description of the Related Art Conventionally, there is a multi-tasking machine in which a laser head is mounted on a turret punch press machine. In such a composite processing machine, punching and laser processing are appropriately performed on the same work. For example, punching is used to make holes, and laser processing is used to cut.

[0003]

Since a plate material processing machine such as a punch press or a laser processing machine handles a large-sized plate-shaped work, the thermal expansion of the frame or the like due to the change of the outside temperature is large. This causes an error in the punch position and the laser processing position. In particular, in the multi-tasking machine as described above,
When laser processing is applied to the punched area,
There is a problem that the processing quality is significantly deteriorated due to the deviation between the punch position and the laser processing position.

Therefore, various means for correcting the thermal displacement have been considered, but if the means for directly measuring the thermal displacement is provided, the structure becomes complicated and the cost becomes high.

An object of the present invention is to provide a multi-tasking machine which has a simple structure and is capable of correcting the deviation between the punch position and the laser processing position due to thermal displacement.

[0006]

The structure of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. The multi-tasking machine includes a punch press mechanism section (1), a laser head (2), and a work feed table device (3). In such a multi-tasking machine, a temperature measuring means (20) is provided in a frame portion (5a) that changes its shape due to a change in outside air temperature, and a work feeding table device (3) offsets the work feeding according to the measurement result. A thermal displacement offset correction means (27) for correcting the amount is provided.

[0007]

[Operation] When the outside temperature changes, the frames (3) to (5)
Changes its shape due to thermal expansion. The temperature of the frame portion (5a) whose shape changes with the outside air temperature is measured by the temperature measuring means (2
0), and the necessary offset amount is calculated from the measurement result by the thermal displacement offset correcting means (27). Workpiece feed offset correction is performed using the calculated value. Since the temperature of the portion (5a) where the shape of the frame changes due to the change of the outside air temperature is measured, the thermal displacement amount of the frame portion (5a) can be known from the temperature measurement value,
Also, the amount of displacement of other parts can be estimated. The thermal displacement offset correcting means (27) obtains the offset amount corresponding to the thermal displacement amount of the punch position (P) or the laser head position (Q) by using an arithmetic expression or the like in which such a relationship is set, and sends it. Correct the amount.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This multi-tasking machine is equipped with a punch press mechanism unit 1, a laser head 2, and a work feed table device 3. The frame of the composite processing machine is composed of an independent punch press machine frame 4, a laser processing machine frame 5, and a table section frame 6.

The punch press mechanism unit 1 has a plurality of punch tools and die tools (not shown) installed on the outer peripheral portions of the upper and lower turrets 7 and 8 which rotate in synchronization for indexing, respectively, to index the punch position P. The punch tool is driven up and down by the crank mechanism 9.

The laser head 2 has an optical system for focusing light and a nozzle (not shown) for assist gas, and the laser light oscillated by the laser oscillator 10 is guided through the laser guide cylinder 11. .. Laser processing machine frame 5
Has an upper frame portion 5a extending in a cantilever shape above the work feed table device 3, and the laser head 2 is located slightly away from the punch position P rearward (Y-axis direction). It is installed at the tip. Further, the laser head 2 is provided with an elevating drive mechanism for retracting and adjusting the focus.

A temperature measuring device 20 for measuring the temperature of the frame 5a is attached to the upper frame 5a of the laser processing machine frame 5. A thermocouple or the like is used for the temperature measuring device 20.

As shown in FIG. 2, the work feed table device 3 has a pair of left and right slide tables 3a installed on the rails 12 of the table frame 6 so as to be movable back and forth, and a fixed table 3b at the center. The slide table 3a is driven forward and backward by the Y-axis servomotor 14 and the feed screw 15 together with the carriage 13 at the rear end. The cross slide 16 is laterally (X-axis direction) on the carriage 13.
A plurality of work holders 17 that are movably mounted and hold a plate-shaped work W are attached to the cross slide 16. The cross slide 16 is driven back and forth by an X-axis servomotor 18 and a feed screw 19 installed on the carriage 13.

The control system will be described with reference to FIG. The NC device 21 is a means for controlling the entire composite processing machine, and has an NC function unit and a programmable controller function unit. The NC device 21 has an arithmetic control unit 22 that executes a machining program, and in accordance with each axis feed command output from the arithmetic control unit 22, the X axis servo motor 14 and the Y axis servo motor 18 are operated via the servo controller 23. Drive is performed. Each of the servomotors 14 and 18 has a position detector such as a pulse coder, and the detected value is fed back to the servo controller 23. The arithmetic control unit 22 is provided with an offset correction means 24 for correcting the X and Y axis feed command values of the machining program by changing the work coordinates by the set offset amount.

In a predetermined storage area in the memory device of the NC device 21, the distance between the punch position P and the laser processing position Q (the center position of the laser beam emitted from the laser head 2) is taken as the processing point offset amount. A processing point offset setting means 26 for storing is provided. The offset correction by the offset correction means 24 is performed by the amount set by the means 26 depending on whether the machining program is punching or laser processing.

Further, the NC device 21 is provided with a thermal displacement offset calculation means 25 constituted by a calculation program or the like. This means 25 is a means for calculating the Y-axis offset amount from the temperature measurement value of the temperature measuring device 20 by a predetermined calculation formula, and causing the offset correction means 24 to make a correction. The thermal displacement offset calculating means 25 and the offset correcting means 24 constitute a thermal displacement offset correcting means 27.

The offset correction operation with the above configuration will be described. With the temperature measuring device 20 provided on the upper frame portion 5a of the laser processing machine frame 5, the upper frame portion 5a
Temperature is measured, and from the measured value, the upper frame portion 5a
The thermal displacement amount of the laser processing position Q of is calculated by the thermal displacement offset calculating means 25. A value obtained by multiplying the calculated thermal displacement amount of the laser processing position Q by a coefficient is fed back to the offset correction means 24 as an offset for the thermal displacement of the distance between the punch position P and the laser processing position Q.

The offset correction means 24 changes the calculated thermal displacement to the offset amount set in the processing point offset setting means 26 when switching from punching to laser processing or vice versa. Offset correction is performed by the offset amount obtained by adding the minute offset.

As a result, the thermal displacement of each of the frames 3 to 5 due to the change in the outside temperature is corrected, and the punching portion and the laser processing portion of the work W are accurately machined without deviation. In this case, the upper frame portion 5a, to which the temperature measuring device 20 is attached, is a portion in which the temperature change hardly occurs due to the operation, and the thermal displacement is almost caused only by the change in the outside temperature. Therefore, the temperature measurement value of this portion is offset. By using it for correction, accurate correction can be performed.

The above offset correction will be described with reference to FIGS. 3 and 4. When the outside air temperature changes with time as shown by a curve d in FIG. 4, the laser processing position Q and the punch position P in FIG. 1 are displaced as shown by curves a and b in FIG. The displacement of the laser processing position Q corresponds to the thermal displacement of the upper frame portion 5a of the laser processing machine frame 5 to which the laser head 2 is attached, and is obtained from the temperature measurement value by the temperature measuring device 20. Punch position P
Although the thermal displacement of 1 has not been measured, it has a predetermined relationship with the displacement of the laser processing position Q, and therefore can be calculated from the displacement of the laser processing position Q. Therefore, the necessary offset amount c can be obtained by multiplying the displacement amount of the laser processing position Q obtained from the temperature measurement value by the coefficient as described above. In the combined processing machine of this embodiment, the punch press frame 4 and the laser processing machine frame 5 are independent of each other, and the punch position P and the laser processing position Q are displaced in the directions opposite to each other. The displacement amount of the processing position Q and the displacement amount of the punch position P are added.

In the above-described embodiment, the offset correction is performed only when the punching and the laser processing are switched, but the offset correction for the thermal displacement may be performed always or at the time of appropriately setting. ..

In the above embodiment, the punch press mechanism section 1 is used.
However, the present invention can be applied to other types of punch press mechanism parts.

[0022]

The offset amount control device of the present invention is provided with temperature measuring means in the frame portion which causes a change in shape due to a change in the outside air temperature, and a thermal displacement amount for correcting the work feed offset amount according to the temperature measurement result. Since the offset correction means is provided, the offset amount can be corrected according to the shape change due to the change of the outside air temperature with a very simple structure, and the processing accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram in which a schematic side view and a functional block diagram of a combined processing machine according to an embodiment of the present invention are shown together.

FIG. 2 is a plan view of the combined processing machine.

FIG. 3 is an explanatory diagram showing a displacement of each part of the combined processing machine.

FIG. 4 is an explanatory diagram showing a temperature change when the displacement of FIG. 3 occurs.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Punch press mechanism part, 2 ... Laser head, 3 ... Work feed table device, 20 ... Temperature measuring device, 21 ... NC device, 24 ... Offset correction means, 25 ... Thermal displacement amount offset calculation means, 27 ... Thermal displacement amount Offset correction means, P
… Punch position, Q… Laser processing position, W… Work

Claims (1)

[Claims] 1. A multi-tasking machine comprising a punch press mechanism section, a laser head and a work feed table device,
Combined machining provided with temperature measuring means for the frame portion that causes a shape change due to changes in the outside air temperature, and thermal displacement offset correcting means for correcting the offset amount of the work feeding by the work feeding table device according to the temperature measurement result. Machine offset amount control device.