JPH08309569A - Thermal cutting device - Google Patents

Abstract

PURPOSE: To reduce a run-out at the time of positioning, to restrain a deflection of a X axis carriage and to enlarge the working range by providing movable a Y axis carriage with a working head on a Y axis guide placed on a X axis carriage of a XY positioning device of the working head. CONSTITUTION: A working device 1 is constituted of a laser working head 3 and a XY positioning device for a material to be worked. A carriage suspension beam member 19 placed on a work table 17 is extensionally provided in the direction of the X axis and a housing supporting beam 39 placing the housings of a laser oscillator 39 and a power supply 41, etc., are juxtaposed at the position adjacent to the carriage suspension beam member 19. An X axis carriage 5 is also constituted of an X axis beam member extending in the direction of the Y axis and the almost center part in the longitudinal direction of the X axis carriage 5 is movably placed on an X axis guide 21 provided on the carriage suspension member 19. Moreover, the Y axis carriage with the laser working head 3 is movably provided on the Y axis guide 9 placed on the X axis carriage.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a thermal cutting apparatus.

[0002]

2. Description of the Related Art A typical cantilever type optical axis moving laser processing apparatus 100 is shown in FIG. 4 as an example of a thermal cutting processing apparatus. The structure of the XY positioning device of this cantilever type optical axis moving laser processing device is such that the Y-axis carriage 102 equipped with the laser processing head 101 is X-axis.
The X-axis carriage 10 is movably provided on a Y-axis guide (not shown) laid on the axis carriage 103.
3 is movably provided on an X-axis guide (not shown) laid on the main body 104.

The main body 104 has a laser oscillator 105.
A power supply device and a control device (not shown) are provided, and a table 106 on which the workpiece W is placed is provided adjacent to the main body 104.

[0004]

Since the conventional cantilever type optical axis moving laser processing apparatus is configured as described above, the installation floor area of the laser processing apparatus 100 is the table on which the workpiece W is placed. 106 and laser oscillator 1
05, power supply unit, and control unit
Floor space for installing both 4 and 4 is required.

Further, in order to expand the processing range in the Y-axis direction, the X-axis carriage 103 must be extended in the Y-axis direction, but since the X-axis carriage 103 has a cantilever structure, this cantilever is used. Assuming that a vertically uniform load is applied to the beam, the bending in the vertical direction increases in proportion to the fourth power of the length, and the accuracy of laser processing decreases.

In order to extend the X-axis carriage 103 in the Y-axis direction without increasing the above-mentioned deflection, the X-axis carriage 10
The rigidity (flexural rigidity) of 3 must be increased.
However, it adds weight and cost to the X-axis carriage 103.

The present invention has been made in view of the above-mentioned problems, and provides a thermal cutting processing apparatus capable of expanding the processing range of a work material while maintaining the processing accuracy and having a small installation floor area. That is.

[0008]

In order to achieve the above object, a thermal cutting processing apparatus of the present invention comprises a thermal cutting processing head and an XY positioning device for positioning the thermal cutting processing head with respect to a workpiece. In the thermal cutting apparatus, a carriage suspension beam member arranged above the work table is provided so as to extend in the X-axis direction, and the beam member extended in the Y-axis direction constitutes an X-axis carriage. The Y-axis laid on the X-axis carriage is movably provided on the X-axis guide provided on the carriage suspension beam member at a substantially center in the direction.
A Y-axis carriage having the thermal cutting head is movably provided on the axis guide.

Further, the thermal cutting apparatus of the present invention is a thermal cutting apparatus having a laser processing head and an XY positioning device for positioning the laser processing head with respect to a workpiece, and is disposed above a work table. The carriage suspension beam member is provided so as to extend in the X-axis direction, and a housing support beam for mounting a housing is provided adjacent to the carriage suspension beam member. A laser oscillator and a laser oscillator are provided on the housing support beam. An X-axis carriage is configured by an X-axis beam member that extends in the Y-axis direction, on which a housing such as a power supply device is mounted, and an X-axis carriage in which the longitudinal center of the X-axis carriage is provided on the carriage suspension beam member. A Y-axis carriage provided with the laser processing head is movably provided on a Y-axis guide laid on the X-axis carriage. .

Further, the thermal cutting apparatus of the present invention is a thermal cutting apparatus equipped with a plasma arc machining head and an XY positioning device for positioning the plasma arc machining head with respect to a work material. A carriage suspension beam member arranged in the X direction is provided, and a chassis support beam for mounting a chassis is provided adjacent to the carriage suspension beam member, and a plasma is provided on the chassis support beam. A casing such as an arc machining power supply device and a control device is mounted, and an X-axis carriage is configured by an X-axis beam member extending in the Y-axis direction, and the carriage suspension beam member is provided at a substantially central portion in the longitudinal direction of the X-axis carriage. Movably provided on the X-axis guide provided on the Y-axis carriage provided with the plasma arc machining head on the Y-axis guide laid on the X-axis carriage. It is characterized in that provided.

The thermal cutting apparatus of the present invention is the thermal cutting apparatus of claim 1, claim 2 or claim 3, wherein the carriage suspension beam member is provided corresponding to the movement of the Y-axis carriage. A balancer mechanism for balancing the X-axis carriage, which is supported substantially at the center, with respect to the center is provided.

Further, the thermal cutting apparatus of the present invention is the thermal cutting apparatus according to claim 4, wherein the balancer mechanism is provided on the side opposite to the traveling side of the thermal cutting head.
A balance weight guide for movably guiding the balance weight in the Y-axis direction is provided on the side surface of the axis carriage, and the balance weight guide is movably engaged with the balance weight guide so as to move in the Y-axis direction of the X-axis carriage. 4 at both ends of
Pulleys are provided at respective corners, and both sides of the balance weight and both sides of the Y-axis carriage, which are symmetrically arranged with respect to the central position of the X-axis carriage, are looped together by a connecting member via the pulleys. It is characterized in that they are connected in a shape.

[0013]

With the thermal cutting apparatus according to claim 1, when the length in the longitudinal direction of the X-axis carriage is L,
This X-axis carriage is equal to a cantilever beam having a length L / 2 that fixedly supports approximately the center of the entire length L, and the deflection of the cantilever beam having a length L / 2 due to its own weight is proportional to the fourth power of the length. So
It can be suppressed to 1/16 as compared with the bending of the cantilever having the length L.

Further, it is possible to reduce the shake of the tip portion of the X-axis carriage during acceleration and deceleration when moving and positioning the X-axis carriage.

With the heat cutting apparatus according to the second aspect, the same operation as that of the first aspect can be obtained, and the installation floor area of the heat cutting apparatus including the laser processing head can be reduced. it can.

With the thermal cutting apparatus according to the third aspect, the same operation as that of the first aspect can be obtained, and the installation floor area of the thermal cutting apparatus having the plasma arc machining head can be reduced. You can

With the thermal cutting apparatus according to the fourth or fifth aspect, even if the Y-axis carriage moves, the Y-axis direction can always be balanced with respect to the central support portion of the X-axis carriage.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a thermal cutting apparatus according to the present invention will be described with reference to the drawings. 1 to 3 show an optical axis moving type laser processing apparatus 1 as an example of a thermal cutting processing apparatus. 1 is a front view of the laser processing apparatus 1, FIG. 2 is a right side view, and FIG. 3 is a plan view.

In the optical axis moving type laser processing apparatus 1, the Y-axis carriage 5 having the laser processing head 3 as a thermal cutting processing head is movable to two Y-axis guides 9 laid on the X-axis carriage 7. Is engaged with.

The Y-axis carriage 5 has a Y-axis feed nut 1 which is screwed into a Y-axis feed screw 13 driven by a Y-axis drive motor 11 provided on the rear side of the X-axis carriage 7.
5 is provided. Further, the laser processing head 3 is provided on a Z-axis guide 16 provided on the Y-axis carriage 5 so as to be movable in the Z-axis direction by a Z-axis drive means (not shown).

The X-axis carriage 7 has a carriage suspension beam member 19 located above the work table 17.
It is movably engaged and suspended by the two X-axis guides 21 laid on the. Further, the extension lengths of the X-axis carriage 7 on both sides of the X-axis guide 21 are set to be substantially equal to the X-axis guide 21 in consideration of weight balance.

An X-axis feed screw 23 whose both ends are non-rotatably supported by two support members 25 provided on the carriage suspension beam member 19 is provided at an intermediate position between the two X-axis guides 21. It is arranged parallel to the guide 21.

The X-axis carriage 7 is rotatably provided with an X-axis feed nut 27 which is screwed into the X-axis feed screw 23, and the X-axis feed nut 27 is appropriately provided with a toothed belt and a pulley. An X-axis drive motor 29 is provided which is rotationally driven by means 26.

The carriage suspension beam member 19 is "ko".
It is bridged between the upper arm portions 33 of the left and right side frames 31 of the shape. Also, the lower arm portion 35 of the side frame 31
Is fixed horizontally on the floor. Further, a housing support beam 37 is provided in parallel between the upper arm portions 33 of the left and right side frames 31 adjacent to the carriage suspension beam member 19, and a laser is provided on the housing support beam 37. Oscillator 3
9. A power supply device 41 is mounted. A control device 43 is mounted on the carriage suspension beam member 19.
It is also possible to mount the control device 43 on the housing support beam 37 without mounting it on the carriage suspension beam member 19.

When the Y-axis carriage 5 moves on the X-axis carriage 7 in the Y-axis direction, the center of the X-axis carriage 7 supported by the carriage suspension beam member in the center thereof is the center of the X-axis carriage 7 in the longitudinal direction. A balancer mechanism 45 for balancing the support portion is provided.

The balancer mechanism 45 has a balance weight guide 49 for guiding the balance weight 47 in the Y-axis direction on the side surface of the X-axis carriage 7 on the side opposite to the traveling side of the thermal cutting head 3. A balance weight 47 is movably engaged with the balance weight guide 49. Pulleys 51 are provided at the four corners of both ends of the X-axis carriage 7 in the Y-axis direction. A symmetric position with respect to the center position, that is, the balance weight 47 and the both sides of the Y-axis carriage 5 which are arranged at an equal distance from the center position of the X-axis carriage 7 in the Y-axis direction, via the pulley 51. They are connected to each other in a loop shape by a connecting member 53 such as a wire or a toothed belt.

In the balancer mechanism 45 having the above structure,
When the Y-axis carriage 5 moves along the X-axis carriage 7, the balance weight 47 and the Y-axis carriage 5 are connected in a loop by the connecting member 53 via the pulley 51. It moves in the direction opposite to the moving direction of the axis carriage 5 by a distance equal to the moving distance of the Y-axis carriage 5. Therefore, the X-axis carriage 7 supported at the center substantially by the carriage suspension beam member is always balanced with respect to the center support portion.

The laser beam 55 from the laser oscillator 39 is guided to the laser processing head 3 by a laser beam guide optical system including a plurality of bend mirrors 57. The laser beam 55 guided to the laser processing head 3 can be condensed by a condensing optical system (not shown) such as a convex lens or a concave lens and applied to the work W placed on the work table 17. .

A work table 17 on which a work W is placed is installed at a lower position within the movable range of the laser processing head 3.

In the above structure, the X-axis drive motor 29 and the Y-axis drive motor 11 are appropriately driven and controlled by the controller 43, so that the laser processing head 3 can be moved to any XY-axis coordinates within the movable range of the XY-axis. The laser machining head 3 can be moved and positioned appropriately, and the gap between the laser machining head 3 and the workpiece W can be kept constant by appropriately moving and positioning the laser machining head 3 by the Z-axis driving means.

Therefore, the work W on the work table 17
For this, laser processing such as laser cutting processing or welding of any shape can be performed.

Although the optical axis moving type laser processing apparatus 1 has been described as an example of the thermal cutting apparatus in the embodiment of the present invention, the present invention is also implemented in a plasma arc processing apparatus known as a thermal cutting apparatus. be able to. That is, the laser processing head 3 of the optical axis moving type laser processing apparatus 1 is replaced with the plasma arc processing head of the plasma arc processing apparatus, and a power supply and control device for plasma arc generation are provided on the housing support beam 37. By properly controlling the plasma arc processing head, the same operation and effect as those of the embodiment can be obtained.

[0033]

According to the first aspect of the present invention, when the length of the X-axis carriage in the longitudinal direction is L, this X-axis carriage has a length L / 2 that fixedly supports substantially the center of the entire length L. Since it is equivalent to a cantilever, the bending due to its own weight on both sides of the support portion of the X-axis carriage can be suppressed to 1/16 as compared with the bending of the cantilever having the length L, and the X-axis carriage can be moved and positioned. The shake of the tip portion of the X-axis carriage during acceleration / deceleration can be reduced.

Therefore, with respect to the deflection of the X-axis carriage due to its own weight and the deflection of the tip portion when the moving and positioning are performed, the degree of freedom in extending the machining range by increasing the length of the X-axis carriage in the longitudinal direction becomes large.

According to the second aspect of the present invention, the installation floor area in the thermal cutting apparatus equipped with the laser processing head can be reduced, so that the cost of product processing can be reduced.

According to the third aspect of the present invention, since the floor area of the thermal cutting apparatus equipped with the plasma arc processing head can be reduced, the cost for processing the product is reduced as in the second aspect. can do.

According to the thermal cutting apparatus of the fourth or fifth aspect, even if the Y-axis carriage moves, the Y-axis direction can always be balanced with respect to the central support portion of the X-axis carriage. That is, since the center of gravity of the X-axis carriage does not move from the center support portion, the X-axis carriage can be driven in a stable state.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a thermal cutting apparatus according to the present invention.

FIG. 2 is a right side view of the embodiment of the thermal cutting apparatus according to the present invention.

FIG. 3 is a plan view of an embodiment of a thermal cutting apparatus according to the present invention.

FIG. 4 is an optical axis moving laser processing apparatus shown as an example of a conventional thermal cutting processing apparatus related to the present invention.

[Explanation of symbols]

 1 Laser processing device 3 Laser processing head 5 Y-axis carriage 7 X-axis carriage 9 Y-axis guide 11 Y-axis drive motor 13 Y-axis feed screw 15 X-axis feed nut 16 Z-axis guide 17 Work table 19 Carriage suspension beam member 21 X-axis Guide 23 X-axis feed screw 27 Y-axis feed nut 29 X-axis drive motor 31 Side frame 37 Enclosure support beam 39 Laser oscillator 41 Power supply device 43 Control device 45 Balancer mechanism 47 Balance weight 49 Balance weight guide 51 Pulley 53 Connecting member 55 laser beam 57 bend mirror

Claims (5)

[Claims] 1. A thermal cutting apparatus comprising a thermal cutting head and an XY positioning device for positioning the thermal cutting head with respect to a workpiece, wherein a carriage suspension beam member disposed above a work table is X-shaped. An X-axis carriage is configured by a beam member extending in the axial direction and extending in the Y-axis direction, and substantially the center of the X-axis carriage in the longitudinal direction is movable on an X-axis guide provided on the carriage suspension beam member. And a Y-axis carriage provided with the thermal cutting head is movably provided on a Y-axis guide laid on the X-axis carriage. 2. A thermal cutting apparatus having a laser processing head and an XY positioning device for positioning the laser processing head with respect to a workpiece, wherein a carriage suspension beam member disposed above a work table is arranged in the X-axis direction. And a chassis support beam for mounting the chassis adjacent to the carriage suspension beam member, and a chassis such as a laser oscillator and a power supply device is mounted on the chassis support beam. And an X-axis beam member extending in the Y-axis direction constitutes an X-axis carriage, and a substantially center of the X-axis carriage in the longitudinal direction is movably provided on an X-axis guide provided on the carriage suspension beam member. A thermal cutting apparatus, wherein a Y-axis carriage provided with the laser processing head is movably provided on a Y-axis guide laid on an X-axis carriage. 3. A plasma arc machining head and XY for positioning the plasma arc machining head with respect to a workpiece.
In a thermal cutting apparatus having a positioning device, a carriage suspension beam member arranged above a work table is X-shaped.
Along with extending in the axial direction, a housing supporting beam for mounting a housing is provided adjacent to the carriage suspension beam member, and a plasma arc processing power supply device, a control device, etc. are mounted on the housing supporting beam. X with the housing placed and extending in the Y-axis direction
An X-axis carriage is configured by the axial beam member, and a Y-axis guide laid on the X-axis carriage is movably provided on the X-axis guide provided on the carriage suspension beam member at a substantially center in the longitudinal direction of the X-axis carriage. A thermal cutting apparatus, wherein a Y-axis carriage equipped with the plasma arc processing head is movably provided on the top. 4. Corresponding to the movement of the Y-axis carriage,
The thermal cutting apparatus according to claim 1, wherein a balancer mechanism for balancing the X-axis carriage, which is supported substantially at the center by the carriage suspension beam member, with respect to the center is provided. . 5. The balancer mechanism is provided with a balance weight guide for movably guiding a balance weight in the Y-axis direction on the side surface of the X-axis carriage on the side opposite to the traveling side of the thermal cutting head, The balance weight is movably engaged with the balance weight guide, pulleys are provided at the four corners of both ends of the X-axis carriage in the Y-axis direction, and the pulleys are provided at symmetrical positions with respect to the central position of the X-axis carriage. 5. The thermal cutting device according to claim 4, wherein both sides of the arranged balance weight and both sides of the Y-axis carriage are connected to each other via the pulley by a connecting member in a loop shape. .