JPS5929400B2 - Cutting machine using high pressure fluid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting machine using high pressure fluid such as a water jet.

In cutting machines that use high-pressure fluid, the nozzle and fluid receiving member are usually synchronized by a belt drive so that they always face each other, but synchronization can occur due to slipping of the belt that is the driving means. In such a case,
Since the high-pressure fluid from the nozzle is not contained in the fluid receiving member, the fluid may splash and damage the object to be cut, generate noise, or cause rust inside the machine if water, etc. is used as the fluid. I fall into a situation like this.

Additionally, if a failure occurs in the solenoid or pulp that controls fluid ejection from the nozzle, the fluid may become unable to eject, or
The eruption may become impossible to stop.

The object of the present invention is to provide a cutting machine that eliminates the above-mentioned defects. EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

First, its configuration will be explained. Reference numeral 1 denotes a machine frame, which is supported by four push rods 2 at an appropriate position above the floor surface.

Belt rollers 3, 4, and 5, 6 are rotatably supported on the machine frame 1.
Wide endless belts T and 8 are stretched between them. Reference numerals 9 and 10 denote rails carried between push rods 11 and 12, and are arranged in a direction perpendicular to the running direction of the flat portions of the belts T and 8.

A spout cursor 15 to which a cutting head 14 having a nozzle 13 is connected is slidably attached to the rail 9. 11 to a high pressure fluid supply means (not shown). The belt roller 3 and the cursor 15 are connected to a numerically controlled drive device (not shown), which controls the rotation of the roller 3 and controls the movement of the cursor 15 along the rail 9. Further, a receiving part cursor 20 is slidably attached to the rail 10 and is connected to a pipe 19 into which a fluid receiving pipe 18 is fitted. A pressure switch 29 is provided at a suitable position in the pipe 19, and is operated by the pressure increase effect caused by the flow of high-pressure fluid into the pipe 19.
It is also electrically connected to a controller 31 to which the solenoid 30 and valve 16 are electrically connected. This controller 31 has a built-in electric signal comparison device, and compares the signal from the detection switch 16a provided in the valve 16 with the signal from the pressure switch 29.If these input signals are of the same type, the operation continues; In this case, the operation is stopped and the cutting operation is stopped by controlling the high-pressure fluid supply means. The fluid receiving pipe 18 is disposed between the belt rollers 4 and 5, and its upper end faces the nozzle 13 with an appropriate distance therebetween. Furthermore, the rail 9
, 10, lobe pulleys 21, 22 and double pulleys 23, 24 are rotatably supported on the leg rods 11, 12, and a timing belt is placed between the pulleys 21, 23. Both ends of the timing belt 25 are fixed to the spouting part cursor 15, and both ends of the timing belt 26, which is hung between the pulleys 22 and 24, are fixed to the receiving part cursor 20. In addition, the double flop 23,
A timing belt 27 is placed between the cursors 15 and 24, and the cursors 15 and 20 are configured to move in the same direction and by the same amount. Therefore, the nozzle 13 and the fluid receiving pipe 18 are always synchronized. They are located opposite each other.

Reference numeral 28 denotes a mounting table on which an object to be cut (not shown) is placed, and is fixed to the flat portions of the belts 7 and 8 by appropriate means.

Although not shown in the figure, the workpiece mounting table 28 has a net-like member attached to the belts 7 and 8 on the open bottom surface of the mounting table outer frame 28a.
The object to be cut is placed on the upper surface of this net-like member. Next, the operation of this embodiment will be explained.

First, an object to be cut, such as a sheet-like member such as cloth, is placed on the net-like member of the mounting table 28 .

Next, when the numerical control drive device is driven, the roller 3 rotates, the belts 7 and 8 rotate, and the mounting table 28 moves in the direction of the X coordinate axis.

On the other hand, the spouting part cursor 15 moves along the rail 9,
The lower end of the nozzle 13 moves over the object to be cut on the mounting table 28 according to a predetermined pattern. Here, the controller 31 operates the high pressure fluid supply means, and the solenoid 3
When the valve 16 is opened by setting 0N to 0N, high-pressure fluid is injected from the nozzle 13 in the form of a beam, and the cut object located directly under the nozzle 13 is cut according to a predetermined pattern.
At this time, the rotation of the timing belt 25 accompanying the movement of the cursor 15 causes the double loop 23 to rotate, and the rotational force is transmitted to the receiving portion cursor 20 via the timing belt 27, the double loop 24, and the timing belt 26. The fluid receiving pipe 18 moves together with the cursor 20 and is positioned directly below the nozzle 13 to face it. Therefore, the beam-shaped high-pressure fluid ejected from the nozzle 13 passes through the object to be cut and the mesh member and falls into the fluid receiving pipe 18. High pressure fluid is pipe 1
9 and then discharged to an appropriate location through a hose. While these series of cutting operations are being carried out, the switch 16 sends a signal depending on the open/closed state of the valve 16.
The ON signal emitted when the switch is in the open state is sent to the controller 31, and the pressure switch 29 is activated by the pressure increase caused by the high pressure fluid flowing into the pipe 19, and sends the ON signal to the controller 31 as well. and send it. The controller 31 receives and compares both signals using its electric signal comparison device, and as mentioned above, when both signals are ON, this indicates that the cutting operation is in a normal state, and the operation continues. However, switch 1
If the signal from the pressure switch 29 is an 0FF signal while the signal from the pressure switch 6a is an 0N signal, the valve 1
6 is open, indicating that high-pressure fluid is being spouted but not flowing into the pipe 19. In other words, this indicates that the nozzle 13 and the fluid receiving pipe 18 are out of synchronization. , the controller 31 generates an 0FF signal and supplies it to the high pressure fluid supply means and the operation is interrupted. On the contrary, the signal from switch 16a is 0FF.
signal from the pressure switch 29, whereas the signal from the pressure switch 29 is 0.
If it is an N signal, it indicates a situation where high-pressure fluid is spewing out and flowing into the pipe 19 even though the valve 16 is in the closed state, and in this case, the controller 31 also outputs the 0FF signal. , and the work is interrupted.
Further, the signal from the switch 16a is an 0FF signal,
The signal from the pressure switch 29 also indicates a normal state when it is an 0FF signal. In this way, the controller 31 compares the signal from the switch 16a and the signal from the pressure switch 29, and when the two signals are of different types, that is, in an abnormal state, the controller 31 generates the 0FF signal and outputs the 0FF signal to the high-pressure fluid supply means. This will stop the operation of the machine and interrupt the cutting operation. Further, the abnormality of synchronization described above can be detected only from the 0N-0FF signal of the pressure switch 29 during the cutting operation based on the signal that sets the solenoid 30 to 0N, that is, the high-pressure fluid ejection signal, and furthermore, the inflow of fluid into the fluid receiving pipe 18. Detection can also be made by providing a proximity switch or the like that is operated by the sensor.

In this case, even though the fluid is being ejected, i.e.
The controller 31 sends a signal (
When the 0FF signal is sent from the pressure switch 29 to the controller 31, the controller 31 generates the 0FF signal and interrupts the cutting operation even though the high-pressure fluid ejection signal is being generated. . As is clear from the above description, the controller 31 that generates the signal that sets the solenoid 30 to ON, that is, the high-pressure fluid ejection signal, constitutes means for generating the high-pressure fluid ejection signal, and also in the first embodiment. The switch 16a constitutes a means for generating a high pressure fluid ejection signal. Note that the above means is not particularly limited to the illustrated embodiment, and the controller 31 detects fluid ejection abnormality based on the signal from the detector 29 and the high-pressure fluid ejection signal from the above means. It constitutes a control device. In this way, according to the present invention, it is possible to detect abnormal conditions related to high-pressure fluid ejection caused by out of synchronization between the nozzle and the fluid receiving pipe or failure of valves, etc., and it is possible to always perform cutting operations in a normal condition. This also makes it possible to prevent damage to the aircraft body caused by the abnormal conditions.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a partially omitted front view, and FIG. 3 is a series diagram showing electrical connections of an abnormality detection mechanism. 1... Machine frame, 3, 4, 5, 6... Belt roller,
7, 8...belt, 9,10...rail, 13...
- Nozzle, 15... Cursor for spouting part, 16... Valve, 16a... Detection switch, 18... Pipe for fluid reception, 19... Pipe, 20... Cursor for receiving part, 21 , 22...Pulley, 23, 24...Double pull, 25, 26, 27...Timing belt,
28... object to be cut mounting table, 29... pressure switch,
30... Solenoid, 31... Controller.

Claims (1)

[Scope of Claims] 1. A high-pressure fluid ejecting section is made movable relative to the workpiece mounting table in a plane parallel to the workpiece mounting table by an appropriate drive device, and A high-pressure fluid ejecting signal is generated in a device in which a fluid receiver disposed opposite the high-pressure fluid ejecting section across the cutting object mounting table is movable so as to draw the same trajectory as the movement trajectory of the high-pressure fluid ejecting section. a detector for detecting whether or not high-pressure fluid has flowed into the fluid receiving portion; and a detector for detecting whether high-pressure fluid has flowed into the fluid receiving portion; A cutting machine that uses high-pressure fluid and a control device that detects abnormality in ejection. 2. The high-pressure fluid ejecting part is made movable relative to the workpiece mounting table in a plane parallel to the workpiece mounting table by an appropriate drive device, and the workpiece mounting table is In the apparatus, a fluid receiving part disposed opposite to the high-pressure fluid jetting part is movable so as to draw the same trajectory as the movement locus of the high-pressure fluid jetting part. A detector detects whether high-pressure fluid has flowed into the receiving part, and detects an abnormality in fluid ejection based on a signal from the detector and a high-pressure fluid ejection signal from the means for generating the high-pressure fluid ejection signal. A cutting machine that uses high-pressure fluid and includes a control device that stops the ejection of fluid.