JPH07232275A - Cutting device - Google Patents

Abstract

PURPOSE:To keep the dust collection performance of a dust collector and to keep the cutting precision regardless of the weight of the dust collector in a cutting device using a tool generating powder dust at the time of cutting a material to be cut. CONSTITUTION:A 1st frame 1 having a carriage 6 mounted with a cutting torch 5 to cut a material to be cut is composed freely movably along a rail 3, and a 2nd frame mounted a controller 9 and a dust collector 10 to collect dust is composed freely movably along the rail 3 (20). A dust 14 having an opening part 14a opposite a cutting torch 5 whose one end is connected to the dust collector 10 and the other side end is mounted on a 1st frame is installed. The opening part 14a is arranged opposite a cylindrical space formed with a bottom plate 16a and a plate 16b of a cutting surface plate 16. The responsiveness against the rotation of a running motor 4 is improved by making the weight of the 1st frame 1 reduced and the tracking precision for the target locus is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device constructed so that dust generated when a material to be cut is cut can be collected by a dust collecting device, and more particularly, it maintains dust collecting performance and cutting precision. The present invention relates to a cutting device that can be used.

[0002]

2. Description of the Related Art It is known that when a material to be cut such as a steel plate or a stainless steel plate is cut using a plasma cutting torch, a large amount of dust is generated along with the cutting. For this reason,
In a cutting device using a plasma cutting torch, a dust collecting device for collecting dust is generally arranged. It is also known that fumes containing dust are generated when a steel plate or a steel plate coated with an anticorrosive paint is cut using a gas cutting torch.

As the above dust collecting apparatus, a main body including a suction fan and a dust separating portion is provided on the floor, and a duct is provided in parallel with a rail on which a frame equipped with a plasma cutting torch runs and the frame is installed. There is a structure in which the duct can be opened so as to face the plasma cutting torch as the vehicle travels. In this dust collector, since the main body is fixedly installed, the extension distance of the duct increases as the frame moves away from the main body.
There is a problem that the suction resistance increases and the dust collecting ability decreases.

For this reason, recently, there is a structure in which the main body of the dust collector is mounted on the frame of the cutting device, and the duct connected to the main body is opened so as to face the plasma cutting torch. In this dust collecting device, the extension distance of the duct is constant regardless of the position of the frame on the rail, and stable dust collecting performance can be exhibited.

[0005]

However, even if the cutting device has the dust collecting device mounted on the frame, there is no problem, and the mounting of the dust collecting device increases the load load on the frame and the load load. Due to the increase in rigidity of the frame, problems such as an increase in self-weight occur. Inertia increases as the frame weight increases, and the problem arises that the rising time from the start of cutting until the cutting speed is reached increases.

In particular, in a numerical control (NC) cutting device or a profile cutting device that two-dimensionally controls the movement trajectory of the cutting torch and performs die cutting, when the cutting direction is changed, the cutting torch reaches a conversion point. It is necessary to set a long section and reduce the cutting speed in that section before starting. In this case, excessive heat is applied to the material to be cut within the section, which causes a problem that the quality of the cut surface deteriorates.

In order to avoid the above problems, it is necessary to increase the size of the drive motor and the transmission device. In this case, a large speed change occurs near the conversion point in the cutting direction, and the positioning accuracy of the cutting torch deteriorates due to the braking force and driving force acting on the frame, which adversely affects the quality and dimensional accuracy of the cutting surface in the product. There is a problem of giving.

It is an object of the present invention to provide a cutting device configured to maintain the dust collecting performance of the dust collecting device and maintain the cutting accuracy regardless of the weight of the dust collecting device.

[0009]

In order to solve the above-mentioned problems, a typical cutting device according to the present invention is a cutting device which uses a tool in which dust is generated along with the cutting of a material to be cut, A first frame that is configured to be able to travel along a rail and that is capable of traversing a tool that cuts a material to be cut in a direction orthogonal to the rail, and a tool that is mounted on the first frame is moved in a predetermined direction. First drive means,
A second frame configured to be able to travel along the rail and having a dust collector that collects dust generated by the cutting of the material to be cut; and a second driving unit that causes the second frame to travel. , One end is connected to the dust collector mounted on the second frame and the other end is the first
It is configured to have a tool mounted on the frame and a duct that opens to face the tool.

[0010]

In the above cutting device, a tool (for example, a plasma cutting torch, a gas cutting torch, a laser cutting torch, or the like) that generates dust when cutting the material to be cut on the first frame traveling along the rail will be referred to as "cutting torch" hereinafter. )), The dust collector is mounted on the second frame that runs along the rail, and the duct connected to the dust collector is opened facing the cutting torch. Dust generated when cutting the material can be collected.

The cutting torch and the carriage for traversing the torch in the direction orthogonal to the rails are mounted on the first frame, and the dust collecting device is mounted on the second frame, so that the weight of the device is supported by the second frame. You can
Therefore, it is possible to reduce the load on the first frame and also reduce the self-weight to reduce the inertia of the first frame. Therefore, the rising time at the start of cutting can be shortened, and the speed control of the cutting torch at the conversion point in the cutting direction becomes easy.

Since the second frame is not equipped with a cutting torch, it is not necessary to match the speed at the start of cutting or when changing the cutting direction with the speed of the cutting torch, and the rise time and the fall time are sufficient. Can be taken.

As described above, it becomes possible to control the speed of the cutting torch regardless of the total weight of the cutting device.
The quality and dimensional accuracy of the cut surface in the product can be maintained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the cutting device will be described below with reference to the drawings. 1 is a plan view of a cutting device according to a first embodiment, FIG. 2 is a front view of the cutting device shown in FIG. 1, FIG. 3 is a plan view of a cutting device according to a second embodiment, and FIG. 4 is a third embodiment. It is a top view of the cutting device concerning.

First, the cutting device according to the first embodiment will be described with reference to FIGS. The 1st which comprises the cutting device A
The frame 1 and the second frame 2 are mounted movably on a pair of rails 3 laid in parallel.

The first frame 1 is constructed as a gate-shaped frame composed of a saddle 1a and a cross girder 1b arranged in a direction orthogonal to the laying direction of the rails 3. The saddle 1a is provided with a traveling motor 4 for traveling the first frame 1 along the rails 3, and a rotary encoder is attached to the motor 4. A traverse rail 1c is provided along the cross girder 1b. Therefore, by driving the traveling motor 4, it is possible to cause the first frame 1 to travel along the rail 3 and simultaneously generate a pulse signal.

A carriage 6 carrying a cutting torch 5 is mounted on the traverse rail 1c so as to traverse in a direction orthogonal to the laying direction of the rail 3. The carriage 6 is provided with a traverse motor 7, and the carriage 6 can be traversed by driving the traverse motor 7.

That is, the traveling motor 3 and the traverse motor 7
It is possible to move the cutting torch 5 in a preset direction at a preset speed by driving each of them in accordance with a signal input in advance. The above running motor 4
The traverse motor 7 constitutes a first drive means. In this embodiment, as the cutting torch 5, a plasma cutting torch that produces the most dust with cutting is used.

Only the carriage 6 is mounted on the first frame 1. Therefore, it is possible to reduce the load applied to the first frame 1. Further, since the applied load is small, it is possible to reduce the rigidity of the first frame 1 and reduce its own weight. Therefore, inertia at the time of stopping and running becomes small, responsiveness is improved, and speed control becomes easy.

The second frame 2 is constructed so that it can be driven along a rail 3 by being driven by a motor 8 having a rotary encoder as a second driving means. The second frame 2 controls the drive of the traveling motor 4, the traverse motor 7 of the first frame 1, the motor 8 of the second frame 2, and the like, and a control device such as an NC device that controls the operation of the cutting torch 5. 9, a dust collector 10 and a relay board 11 for a plasma cutting torch, which is the cutting torch 5, are mounted.

The relay board 11 and the cutting torch 5 are a cap tire for energization, a hose for supplying plasma gas, and a cutting torch 5.
Are connected by hoses 12 such as a water supply hose for cooling water and a discharge hose.
Suspended at 13.

When a gas cutting torch is used as the cutting torch 5, valves and pressure control valves for supplying and stopping preheating oxygen, fuel gas and cutting oxygen to the gas cutting torch instead of the relay board 11. , A functional member such as a flashback preventer is installed. The functional member and the gas cutting torch are connected by hoses for supplying oxygen and fuel gas, and these hoses are suspended on the hanger 13.

The duct 14 connected to the dust collector 10 has the opening 14a located at the end of the first frame 1 and in the vicinity of the traverse rail 1c provided on the frame 1 to cut the torch 5. Is facing.

As the duct 14, one end of a tubular member having a predetermined strength and rigidity is fixed to the dust collector 10 and the opening 14a which is the other end is cut as a free end from below the first frame 1. It is possible to dispose the torch 5 so as to face it. In this case, the duct 14 is formed in a cantilever shape, and the opening 14 is formed as the second frame 2 travels.
There is a possibility that the suction performance may change when a is swung or a relative speed difference between the first frame 1 and the second frame 2 occurs.

Therefore, in this embodiment, the tip portion of the duct 14 including the opening 14a of a predetermined length is made of a cylindrical member having rigidity, and the connecting portion to the dust collecting device 10 is also the same. The duct 14 is configured by being formed of a rigid cylindrical member and connecting the both by a bellows 14b having elasticity. And stay the tip
By fixing it to the lower surface of the first frame 1 by means of 15, the opening 14a can always maintain a constant position even when a speed difference occurs between the first frame 1 and the second frame 2. is there.

A cutting platen 16 on which a material to be cut is placed is provided between the pair of rails 3. This cutting surface plate 16 is a bottom plate
16a and a plurality of plates 16b arranged on the bottom plate 16a so as to stand upright in a direction orthogonal to the laying direction of the rail 3, and when the material to be cut is placed on the plate 16b, the bottom plate 16
A cylindrical space is formed by the plate 16b adjacent to a and the material to be cut.

Therefore, the opening 14a of the duct 14 is formed to have a height and a size capable of facing the space formed by the cutting surface plate 16 and the material to be cut. Then, by applying a negative pressure of the dust collector 10 to the space, it is possible to suck the dust generated when the material to be cut is cut by the cutting torch 5.

In the cutting device A configured as described above, the control device 9 previously informs the control device 9 of the locus of the movement of the cutting torch 5,
When information necessary for cutting such as cutting speed and plasma current value for the material to be cut is input to start cutting, the cutting torch 5 starts to operate by a signal from the controller 9, and at the same time, the traveling motor 4, A drive signal is transmitted to the traverse motor 7, and the first frame 1 and the carriage 6 respectively travel and traverse to move the cutting torch 5 in accordance with a target locus.

When the first frame 1 travels, since the frame 1 is constructed as a lightweight frame having only the carriage 6 for traversing the cutting torch 5, it is quick to start rotation of the traveling motor 4 and change in rotational speed. It becomes possible to improve the tracking accuracy for the target trajectory, that is, the dimensional accuracy of the product, and to maintain the quality of the cut surface.

Along with the traveling of the first frame 1, a pulse signal is generated from the rotary encoder attached to the traveling motor 4 and transmitted to the control device 9. In the control device 9, the pulse signal transmitted from the traveling motor 4 and the second
A drive signal corresponding to the difference in pulse signals from the motor 8 of the frame 2 is transmitted to the motor 8 to rotate the motor 8. As a result, the second frame 2 travels in the same direction as the first frame 1. When the difference between the pulse signal from the motor 8 and the pulse signal from the traveling motor 4 disappears, the drive signal for the motor 8 stops and the second frame 2 stops.

As described above, the second frame 2 travels following the first frame 1. This second frame 2
Since an object with a large weight, such as the control device 9, the dust collector 10, the plasma relay board 11, etc., is mounted on the vehicle, it is necessary to move from a stopped state to a running state or from a running state to a stopped state. If the speed is suddenly changed, a large shock may be applied to the second frame 2. Therefore, the rise time and the fall time of the second frame 2 are set to be sufficiently long so that the impact can be prevented.

However, the rise time of the second frame 2,
Even if the fall time is slightly increased, the first frame 1 equipped with the cutting torch 5 is controlled according to the cutting information for the material to be cut, so that the dimensional accuracy of the product and the quality of the cut surface are not adversely affected. .

Next, the cutting device B according to the second embodiment will be described with reference to FIG. The same parts and parts having the same functions as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

In the figure, a pair of rails 20 are laid parallel to the rails 3. A first frame 1 having a carriage 6 having a cutting torch 5 mounted thereon is movably mounted on a rail 3, and a second frame 2 having a controller 9, a dust collector 10, and a plasma relay board 11 mounted on a rail 20. Is mounted so that it can travel.

A hanger 13 is provided on the upper part of the first frame 1, and a hose for supplying plasma gas to the cutting torch 5, a hose for supplying cooling water, and a hose for cooling water are discharged from the plasma relay board 11 to the hanger 13. A hose 12 composed of a rotating hose, a cap tire, etc. is suspended.

Even in the cutting device B constructed as described above, the rotation of the traveling motor 4 and the traverse motor 7 is controlled by the drive signal from the control device 9 as in the first embodiment, and the second frame is used. By causing 2 to follow the traveling of the first frame 1, it is possible to smoothly move the cutting torch 5 in accordance with the target trajectory and cut the material to be cut regardless of the weight of the control device 9 and the dust collecting device 10. Therefore, it is possible to improve the dimensional accuracy of the cut product and maintain the quality of the cut surface.

Next, the cutting device C according to the third embodiment will be described with reference to FIG. The same parts and parts having the same functions as those in the first and second embodiments described above are designated by the same reference numerals and the description thereof will be omitted.

In the figure, a rail 20 has a second frame 2 on which a controller 9, a dust collector 10 and a plasma relay board 11 are mounted.
Is mounted so that it can travel. One rail 3a is provided on the upper surface of the second frame 2 in parallel with the rail 20,
Moreover, one rail 3b is laid at a position parallel to the rail 20 and separated by a predetermined distance.

The first frame 1 has one end side mounted on the rail 3a and the other end side mounted on the rail 3b. In this state, the first frame 1 can travel on the rails 3a, 3b. Has been done.

Even with the cutting device C configured as described above, the cutting torch 5 is carried out in the same manner as in the first and second embodiments.
The material to be cut can be smoothly moved by following the target trajectory, and the dimensional accuracy of the cut product can be improved and the quality of the cut surface can be maintained.

[0041]

As described above in detail, in the cutting device according to the present invention, the tool (cutting torch) is mounted on the first frame and the dust collecting device is mounted on the second frame, so that the dust collecting device It is possible to reduce the weight of the first frame regardless of the weight, and it is possible to improve the responsiveness of the frame to the speed change by the first driving means. Therefore, it is possible to improve the tracking accuracy of the tool with respect to the target trajectory, and it is possible to improve the dimensional accuracy of the product.

[Brief description of drawings]

FIG. 1 is a plan view of a cutting device according to a first embodiment.

FIG. 2 is a front view of the cutting device shown in FIG.

FIG. 3 is a plan view of a cutting device according to a second embodiment.

FIG. 4 is a plan view of a cutting device according to a third embodiment.

[Explanation of symbols]

A, B, C cutting device 1
1st frame 1a Saddle 1b
Cross girder 1c Traverse rail 2
Second frame 3,3a, 3b Rail 4
Traveling motor 5 Cutting torch 6
Carriage 7 Traverse motor 8
Motor 9 Controller 10
Dust collector 11 Plasma relay board 12
Hose 13 Hanger 14
Duct 14a Opening 14b
Bellows 15 stay 16
Cutting surface plate 16a Bottom plate 16b
Plate 20 rail

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F24F 7/06 101 B

Claims (5)

[Claims] 1. A cutting device that uses a tool in which dust is generated along with the cutting of a material to be cut, the tool being configured to run along a rail and cutting the material to be cut is orthogonal to the rail. A first frame mounted so as to be traversable in any direction, a first driving means for moving a tool mounted on the first frame in a predetermined direction, and configured to run along a rail and for cutting a material to be cut. A second frame equipped with a dust collector that collects dust generated during the operation; and second drive means for moving the second frame.
A cutting device, characterized in that one end is connected to a dust collector mounted on the second frame and the other end has a duct that opens to face a tool mounted on the first frame. 2. The cutting device according to claim 1, wherein the rail on which the first frame travels and the rail on which the second frame travels are the same rail. 3. The rail on which the first frame travels and the rail on which the second frame travels are laid in parallel to each other, and each frame is mounted independently on each rail. The cutting device described. 4. A rail on which the first frame travels and a rail on which the second frame travels are laid parallel to each other, and one of the rails on which the first frame travels is mounted on the second frame. The cutting device according to claim 1. 5. The cutting device according to claim 1, wherein a part of the duct is configured to be capable of expanding and contracting.