JPH10193216A - Cutting recognizing method and device for cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten cutting time by performing notching while driving a cutter of a cutting machine, detecting that cutting is completed, and returning the cutting machine to an original position by its signal. SOLUTION: A cutting object member A is gripped by a pair of left and right chucks 1 and 1 by leaving a space with a cutting place as a boundary, and an electric wire 2 is connected between both chucks 1 and 1, and a DC power source 3 and a relay 4 are connected in series in the middle of the electric wire 2. A cutter motor 5b of a cutting machine 5 is driven, and a notching is performed by a descent of an elevating means 6 while rotating a disk cutter 5a, and when cutting is completed, breaking of current-carrying in the electric wire 2 is detected by the relay 4, and its signal is imparted to a hydraulic cylinder 6 being the elevating means, and the cutting machine 5 is returned to an original position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method and an apparatus for recognizing the cutting of a cutting machine.

[0002]

2. Description of the Related Art In a conventional cutting apparatus, for example, in which a pipe is cut by a rotary disk cutter, there is no means for confirming the completion of cutting, and the judgment is made based on upper and lower positions of a hydraulic cylinder which moves up and down the cutter.

[0003]

However, in this prior art, the cutter starts cutting the pipe from the upper limit, completes the cutting, and then lowers to the lower limit, which takes a long time. An object of the present invention is to solve the above-mentioned problems and to provide a method and an apparatus capable of reducing a cutting time.

[0004]

Means for Solving the Problems To solve the above problems, the configuration of the present invention is as follows. That is, in the method of the first configuration, the member to be cut is grasped by a pair of right and left chucks at intervals with the cutting point as a boundary, and the cutting is performed while driving the cutter of the cutting machine, and it is detected that the cutting is completed. Then, the cutting machine is returned to the original position by the signal.

The apparatus of the second configuration comprises a pair of left and right chucks spaced apart from each other at a cutting point of a member to be cut, detecting means for a cutter provided between the chucks, and elevating means for the cutting machine. The cutting machine is driven to cut while driving, and when the cutting is completed, the detection is performed by the detection unit, and the signal is supplied to the lifting / lowering unit to return the cutting machine to the original position. .

[0006]

Embodiments of the present invention will be described below based on one embodiment shown in the drawings. 1 and 2, a member A to be cut is grasped by a pair of left and right chucks 1 and 1 at intervals with a cutting point as a boundary, and an electric wire 2 is connected between the two chucks. 3 and the relay 4 are connected in series. In the cutting machine 5, a cutter motor 5b for rotating the disk cutter 5a is attached to the arm 5c, a base end of the arm 5c is swingably attached to the support table 5d, and a lifting means is provided between the arm 5c and the base 5e. The barrel hydraulic piston cylinder 6 is pin-coupled. In order to detect the height of the arm 5c (disk cutter 5a), the scale member 8 of the magnescale 8 is provided on the cylinder side.
a, a sliding piece 8b is attached to the piston rod side.

The cutter motor 5b of the cutting machine 5
Is driven to cut the disk cutter 5a while rotating. When the cutting is completed, the interruption of the current supply to the electric wire 2 is detected by the relay 4, and the signal is given to the hydraulic cylinder 6 as a lifting / lowering means. 5 is returned to the original position. An ammeter 7 is connected to the cutter motor 5b.

This apparatus uses a sequencer (programmable controller), and as shown in FIG. 3, a central processing unit 11 is connected to a storage device 12, an arithmetic device 13, and an input device 14 comprising a keyboard. I do. Further, the cutter motor 5b and the lifting / lowering means 6 are connected to the central processing unit 11 via the output device 15. Then, a relay contact 4, an ammeter 7 and a magnescale 8 are connected to the input device 14, respectively.

The central processing unit 11 is mainly composed of a microprocessor, and the storage device 12 includes a read only memory (ROM) and a random access memory (RAM). The data to be processed by the central processing unit 11 is stored. The input device 14 receives signals from the respective inputs, and in response to an operation command from the input device, the central processing unit 11 cooperates with the storage device 12, the arithmetic device 13, and the like via the output device 15 to output the cutter motor 5b. And outputs a signal to the lifting / lowering means 6.

Next, this method will be described with reference to the flowchart shown in FIG. When the program starts, the lifting / lowering means 6 is rotated while rotating the disk cutter 5a.
Is lowered to perform a cutting operation (step S1). It is determined whether the current value of the ammeter 7> X (A) (X: no-load current) (step S2). If NO, the process returns to the step S1. If YES, it is determined whether or not the position of the disk cutter 5a (arm 5c) at that time is stored in the magnescale 8 (step S3). If NO, it means the first cutting, and the position of the cutter 5a at that time. H (Magnescale 8
Is stored (step S4). If YES, it means the second disconnection, the step S4 is passed, it is determined whether or not the relay contact 4 is OFF (step S5). If YES, the disconnection is completed. Then, the rotation of the disk cutter 5a is stopped (step S6), and the lifting / lowering means 6 is operated to operate the cutter 5a.
Is raised (step S7), and the position of the cutter> H + a
Is determined (step S8), and if YES, the ascent of the cutter is stopped (step S9), and the process ends. If NO, the process returns to step S6. If NO in steps S2 and S5, the process returns to before step S1.

The cutting start position of the cutter is detected by detecting the rotation angle of the arm by providing an encoder or the like at the end of the swing shaft of the arm 5c in addition to the scales such as the magnescale. You may. Further, the determination of the completion of the cutting may be made by a photosensor or a proximity switch provided on the chucks 1 and 1 in addition to the above-described current supply / interruption.

The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the appended claims.

[0013]

According to the configuration of the present invention, the cutting time can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of one embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a block diagram of one embodiment of the present invention.

FIG. 4 is a flowchart of a microcomputer.

[Description of Signs] A Member to be cut 1 Chuck 2 Electric wire 3 DC power supply 4 Relay 5 Cutting machine 5a Cutter 5b Cutter motor 5c Arm 5d Support base 5e Base 6 Elevating means 7 Ammeter 8 Magnescale 11 Central processing unit 12 Storage device 13 Arithmetic unit 14 Input unit 15 Output unit

Claims (2)

[Claims] 1. A member to be cut is grasped by a pair of right and left chucks at intervals with a cutting point as a boundary, and cutting is performed while driving a cutter of a cutting machine, and it is detected that cutting is completed, and a signal of the completion is detected. The cutting machine is returned to its original position. 2. The cutting machine comprising: a pair of left and right chucks spaced from each other at a cutting position of a member to be cut, detecting means of a cutter provided between the chucks, and elevating means of the cutting machine; The cutting machine cuts while driving the cutter of the machine, detects when the cutting is completed by the detection means, and gives a signal to the lifting / lowering means to return the cutting machine to its original position. Cutting recognition device.