JPH0716799B2 - Cutting machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to cutting for cutting a workpiece by an energy flow supplied from a processing nozzle provided in a processing head, such as a laser beam, a plasma jet, or a water jet. The present invention relates to a processing apparatus, and more particularly, to a cutting processing apparatus having improved permeability of an energy flow to a work piece.

[Prior Art] When cutting a plate-like workpiece with an energy flow supplied from a processing nozzle provided in a processing head, such as a laser beam, a plasma jet, or a water jet, a large number of workpieces are installed upright on a work table. The work piece may be supported by a supporting column (also sometimes referred to as Kenzan).

[Problems to be Solved by the Invention] In this case, when the energy flow hits the upper end of the support column during the cutting process of the workpiece, the permeability of the energy flow to the workpiece deteriorates, and the machining accuracy deteriorates. There is. For example, if a laser beam is applied to the upper end of a supporting column that supports the workpiece while the workpiece is being cut using the laser beam, the laser beam damages the supporting column. Of course, the laser beam reflected from the support column adversely affects the machining accuracy of the workpiece. Also,
The flow of the assist gas injected from the processing nozzle is blocked by the support column, which reduces the ability to remove dross, increases the amount of dross attached to the back surface of the workpiece, and increases the cutting width. The cutting accuracy may be deteriorated.

The present invention has been made in view of the conventional problems as described above, and an object thereof is to prevent damage to a support column due to an energy flow supplied from a processing nozzle, and to allow the energy flow to pass through a workpiece. In doing so, it is an object of the present invention to provide a processing apparatus that can prevent deterioration of the processing accuracy of a workpiece due to the permeability of an energy flow without being obstructed by the support column.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a Y provided in a bed disposed below a processing head having a processing nozzle.
An X-axis guide rail in the X-axis direction, which is orthogonal to the Y-axis guide rail, is provided on a carriage that is reciprocally supported by the Y-axis guide rail in the axial direction, and is movable in the X-axis direction while being guided by the X-axis guide rail. A plurality of beam members extending in the Y-axis direction are provided at appropriate intervals in the X-axis direction, and a plurality of support columns supported by the beam members to support the workpiece are provided in the Y-axis direction. A portion corresponding to the machining nozzle, each of which is provided at an appropriate interval and is provided with each of the support columns so as to be vertically movable individually, and each of the displacement actuating members, which are individually supported by the carriage so as to be vertically movable, corresponding to the beam members. A first for individually moving each of the support columns up and down.
And a second upper protrusion for individually moving the displacement actuating members up and down at a position where the bed corresponds to the machining nozzle, in the Y-axis direction of the carriage. Of the support nozzle corresponding to the machining nozzle by the first upper protrusion provided on the displacement actuating member which is vertically moved by the second upper protrusion by the movement of the workpiece support table and the movement of the work support table in the X-axis direction. Is configured to operate up and down.

[Embodiment] Referring to FIG. 1, a cutting apparatus 1 includes a processing head 5 having a processing nozzle 3 for supplying an energy flow such as a laser beam, a plasma jet, or a water jet. A work table 7 for supporting a plate-like work piece W to be cut out or cut is arranged at a lower position of the.

In this embodiment, the work table 7 is configured to move relative to the machining head 5 in the X-axis and Y-axis directions. That is, a Y-axis guide rail 11 extending in the Y-axis direction is provided on the bed 9 of the cutting and processing apparatus 1, and a carriage 13 is provided on the Y-axis guide rail 11.
Is movably supported. A work support table for supporting the work piece W is provided on the carriage 13.
The work support table 15 is movably provided in the X-axis direction orthogonal to the Y-axis direction, as will be described later.

The movement of the work table 7 in the X-axis and Y-axis directions is performed by driving servo motors (not shown). Control of each servo motor and control of supply of energy flow from the processing nozzle 3 are performed. Is an appropriate controller 17 such as an NC controller provided in the cutting device 1.
It is done by.

With the above configuration, the work piece W is placed on the work table 7.
After mounting the workpiece, the workpiece is moved by appropriately moving the work table 7 in the X-axis and Y-axis directions while supplying an energy flow such as a laser beam to the workpiece W from the processing nozzle 3 in the processing head 5. It will be appreciated that the piece W may be appropriately shaped by cutting or cutting.

A work support table in the work table 7, as shown in more detail in FIGS. 2, 3 and 4.
Numeral 15 is movably supported on an X-axis guide rail 19 provided on the carriage 13. The work table 15 is formed in a quadrangular frame shape, and a plurality of beam members 21 extending in the Y-axis direction are arranged on the work table 15 at appropriate intervals in the X-axis direction.

In order to support the workpiece W, each beam member 21 has a plurality of support columns 23 arranged at appropriate intervals in the Y-axis direction. As shown in FIGS. 5 and 6, each of the support columns 23 is provided in a vertically penetrating hole 21H formed in the beam member 21 so as to be vertically movable. Each support pillar 23
Is urged by a spring (not shown) or its own weight so as to always descend, but the descending position is appropriately regulated by the action of a ring-shaped stopper 25 attached to each support column 23, for example. .

In order to push up each of the support columns 23 to a predetermined position, a bracket 27 is provided at a position where the beam member 21 corresponds to each of the support columns 23, and each bracket 27 is provided with a hinge pin 29. Bell crank-shaped levers 31 are rotatably supported.

Each lever 31 is a torsion spring (not shown).
6 is always urged in the clockwise direction in FIG. 6, and the rotation in the clockwise direction is performed by each bracket.
It is regulated at a predetermined position by each stopper pin 33 provided on each 29. One end portion side of each lever 31 supports the lower end portion of each support column 23, and the other end portion side is provided so as to be oriented downward. In this embodiment, rollers are provided at both ends of each lever 31, and each support column 23 is supported on one end side of the lever 31 via the rollers.

As can be understood from the above structure, the support column 23 is provided with the lever 31.
It is always pushed up to a predetermined height by the action of. That is, the support column 23 supports the work piece W in a state of being pushed up to a predetermined height as shown in FIGS. Also, in FIG. 6, the lever
By rotating 31 in the counterclockwise direction, the support pillar 23
As shown in FIG. 6, the stopper 25 is a beam member.
It descends until it contacts the upper surface of 21.

As can be seen from the above, the support post 23 is
Is moved up and down by appropriately operating. In other words, the support column 23 is displaceable between the first position in which the work piece W is supported by being pushed up and the second position in which the support of the work piece W is released.

As shown in FIGS. 2 and 3, the carriage 13 is provided with a displacement actuating member 35 for actuating the lever 31 to displace the support column 23 up and down.

More specifically, the carriage 13 has a quadrangular frame shape, and inside the carriage 13, the plurality of displacement actuating members 35 extending in the X-axis direction are arranged at appropriate intervals in the Y-axis direction. ing. The distance between the displacement actuating members 35 in the Y-axis direction is substantially equal to the distance between the support columns 23 in the Y-axis direction, and the number of the displacement actuating members 35 is equal to the number of rows of the support columns 23 in the Y-axis direction. It is provided. Both ends of each displacement operating member 35 are vertically movably guided and supported by guide members 37 attached to the carriage 13, and each displacement operating member is also supported.
An upper protruding portion for operating the lever 31 is provided at a substantially central portion of the longitudinal direction of 35.

The upper protruding portion may have an appropriate cam shape such as a substantially triangular mountain shape, but in the present embodiment,
As shown in FIGS. 5 and 6, a roller 39 is attached to the upper portion of the displacement actuating member 35 via a bracket 37. The roller 39 is provided at a height position where it interferes with the other end side of the lever 31 only when the displacement actuating member 35 is in a raised state, and the position in the X-axis direction is the machining nozzle 3 A lever 31 for operating a support column 23 located below the is provided at a position where it interferes. Further, in order to push up the respective displacement actuating members 35, at the position below the processing nozzle 3, the bed 9 is provided with a roller 43 as an upward projecting member via a bracket 41, as shown in FIG. Is rotatably provided.

With the above configuration, when the carriage 13 moves in the Y-axis direction along the Y-axis guide rail 11, the displacement actuating member 35 in contact with the roller 43 rides on the roller 43 and is lifted. That is, only the displacement actuating member 35 located at the lower position corresponding to the processing nozzle 3 is pushed up. In the above-mentioned state, when the work support table 15 is moved in the X-axis direction, the other end side of each lever 31 for operating each support column 23 in the row of the support columns 23 passing below the processing nozzle 3. As shown in FIGS. 5 and 6, interferes with the roller 39 provided on the displacement actuating member 35 in the pushed up state, and is rotated counterclockwise in FIG. Become.

Therefore, the support pillar 23 located below the processing nozzle 3
Is lowered, and the support of the workpiece W is released.

Therefore, according to the above-described embodiment, the work table 7 is moved in the X-axis and Y-axis directions, and the nozzle 3 of the processing head 5 is moved.
When cutting or cutting the workpiece W by supplying an energy flow such as a laser beam from the
The support pillars 23 are not immediately hit, and good permeability is always maintained. Therefore, the stagnation of the energy flow and the adverse effects of the reflection from the support column 23 are small, and the work piece W can be cut satisfactorily.

Next, referring to FIG. 7 and FIG. 8 showing reference examples, in this reference example, each support column 23 corresponds to each support column 23.
An appropriate actuator (not shown) such as a solenoid or a cylinder device for individually moving up and down is provided. Also, Y-axis direction sensors Y1, Y2, Y such as limit switches corresponding to the number of rows of each support column 23 in the X-axis direction.
3, ... Are provided on the carriage 13, and for operating the Y-axis direction sensors Y1, Y2, Y3 ... In a vertical plane in the X-axis direction including the center of the processing nozzle 3 in the processing head 5. A first dog 45 is provided. Further, the work support table 15 is provided with X-axis direction sensors X1, X2, X3, ... Corresponding to the rows of the beam members 21. The second dog 47 for operating the X-axis direction sensors X1, X2, X3, ... Is attached to the carriage 13 in a vertical plane in the Y-axis direction including the center of the processing nozzle 3.

As understood from the above configuration, in the reference example, when the work table 7 moves in the X-axis and Y-axis directions, the Y-axis direction sensors Y1, Y2, Y3, ... And the X-axis direction sensors X1, X2, X3, Are operated by the first and second dogs 45 and 47, respectively. Therefore, with the circuit configuration as shown in FIG. 9, for example, when the Y-axis direction sensor Y1 and the X-axis direction sensor X1 are both actuated, the actuator 49 (see FIG. 10) is driven by the signal from the AND circuit 1-1. The wedge member 51, which is operated and moved by the operation of the actuator 49, appropriately moves back and forth, thereby appropriately lowering the support column 23 located below the processing nozzle 3.

More specifically, the wedge member 51 directly connected to the plunger of the actuator 49 is pushed into the lower portion of the roller 53 mounted on the side portion of the support column 23 to push up the support column 23, and the wedge member 51 is The support column 23 descends by retracting from the position of the roller 53.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, the work table is configured in a fixed state, an arm member extending in the X-axis direction is provided above the work table so as to be movable in the Y-axis direction, and the movement position of the arm member in the Y-axis direction is detected in the Y-axis direction. A sensor is provided, the machining head supported by the arm member is provided so as to be movable in the X-axis direction, and an X-axis direction sensor that detects the movement position of the machining head in the X-axis direction is provided. It is also possible to adopt a configuration in which the support column located below the machining nozzle provided in the machining head is lowered based on the detection of the axial sensor. That is, it can be easily implemented in a form in which the processing head moves in the X-axis and Y-axis directions. Further, it can be easily implemented in a type in which both the work table and the processing head move in the directions orthogonal to each other.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, only the supporting columns corresponding to the processing nozzles provided in the processing head (not all supporting columns in the corresponding row) are provided. Since it is configured to move up and down, of course, the above-mentioned conventional problems are solved, and since the plurality of support columns around the support column corresponding to the processing nozzle support the workpiece at a position close to each other. , For example, the workpiece is thin,
Even a workpiece that is likely to bend due to the injection of assist gas or the like from the processing nozzle can be supported while suppressing the above-mentioned deflection, and more accurate cutting can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a cutting device. FIG. 2 is a front view corresponding to the line II-II in FIG. FIG. 3 is a right side view of FIG. 2, and FIG. 4 is a plan view of the same. 5 is an enlarged sectional view taken along the line VV in FIG. 2, and FIG. 6 is a left side view of FIG. FIG. 7 is a side view of the reference example, and FIG. 8 is a front view. 9th
FIG. 10 is a circuit explanatory diagram, and FIG. 10 is an operation explanatory diagram in the reference example. 3 ... Machining nozzle 5 ... Machining head 9 ... Bed 11 ... Y-axis guide rail 13 ... Carriage 15 ... Workpiece support table 19 ... X-axis guide rail 21 ... Beam member 23 ... Support column 31 ... … Lever 35 …… Displacement actuating member

Claims (1)

[Claims] 1. A reciprocally supported Y-axis guide rail (11) provided in a bed (9) arranged below a processing head (5) having a processing nozzle (3). A carriage (13) is provided with an X-axis guide rail (19) in the X-axis direction orthogonal to the Y-axis guide rail (11), and is supported by the X-axis guide rail (19) so as to be movable in the X-axis direction. A plurality of beam members (21) extending in the Y-axis direction are provided on the table (15) at appropriate intervals in the X-axis direction, and each beam member (2) is provided to support the workpiece (W).
A plurality of support columns (23) supported by 1) are provided at appropriate intervals in the Y-axis direction, and each support column (23) is individually movably provided up and down, corresponding to each beam member (21). Displacement operation members (35) individually supported by the carriage (13) so as to be vertically movable are provided at positions corresponding to the processing nozzles (3).
A first upward protrusion is provided for vertically moving each of the support columns (23) individually, and each of the displacement actuating members (35) is located at a position where the bed (9) corresponds to the processing nozzle (3). A second upward protrusion for individually moving up and down, and by moving the carriage (13) in the Y-axis direction and moving the work support table (15) in the X-axis direction, Of the displacement actuating member (35) vertically moved by the upper protrusion of the above, only the support column (23) corresponding to the processing nozzle (3) is vertically moved by the first upper protrusion. Characteristic cutting device.