JPH06182430A - Disconnection detector for wire drawing mill - Google Patents

Abstract

PURPOSE:To provide a disconnection detector for a wire drawing mill which can surely detect the breaking of a wire rod when a wire rod such as a copper wire is drawn by a wire drawing mill. CONSTITUTION:In the disconnection detectors 5a, 5b, 5c, 5d, of the wire drawing mill wherein a conductor is arranged so as to bring the disconnection part of the wire rod 1, when the wire rod 1 is disconnected, into contact with the conductor in the wire drawing machine in which the wire rod 1 supplied from a wire rod supplying device 2 is drawn by dies 3a, 3b, 3c, 3d and the disconnection of the wire rod 1 is detected by the electric conduction state between the wire rod 1 and the conductor, the conductor of a disconnection detector 5 is formed to a cylindrical body arranged so as to guide the wire rod 1 therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire breakage detector provided in a wire drawing machine for drawing a wire such as a copper wire.

[0002]

2. Description of the Related Art A production line for a wire such as a copper wire usually comprises a wire drawing process and a finishing process. After drawing a large diameter wire in a wire drawing process to obtain a wire having a predetermined small diameter, Polishing or the like is performed in the finishing step to obtain a desired wire rod. The wire rod is inserted in the wire drawing process and the finishing process. The wire-drawing machine used in the wire-drawing process includes a plurality of dies of different diameters for drawing a large-diameter wire rod into a small-diameter wire rod, and the wire rod is placed between these dies to wind the wire rod into a wire rod. It is composed of a plurality of drums for applying tension. When the wire is drawn by the wire drawing machine, the wire may be broken, and when the wire is broken, the portion is welded and drawn again by the wire drawing machine. However, when the wire drawing machine is operated while the wire rod is broken, the wire rod is pulled out by the winding device that winds up the wire rod after the finishing process. That is, since the wire rod passes through each process as one continuous wire from the wire drawing process to the finishing process and is wound up by the winding device, if the wire rod is broken during this time, the wire rod is inserted and the aforementioned The work of connecting to the drawn wire is extremely complicated. Therefore, the wire drawing machine is provided with a wire breakage detector that detects wire breakage in the wire rod. Conventionally, a wire breakage detector of a wire drawing machine arranges a metal plate in the vicinity of each drum arranged between respective dies, forms a part of an electric circuit with the metal plate and the wire material, and breaks the wire. A wire breakage is detected by detecting the conduction state when the wire rod is swung by the rotation of the drum and comes into contact with the metal plate, and the wire drawing machine is stopped based on this detection.

[0003]

However, in the above wire breakage detecting means, since the wire rod has rigidity when the wire rod diameter is large, the wire rod is swung by the rotation of the drum at the time of wire breakage and separated from the drum to contact the metal plate. However, when the wire diameter is small, there is a disadvantage that the wire may be wound around the drum, may not contact the metal plate, and may not be detected. The present invention has been made in view of the above circumstances, and provides a wire breaker detector of a wire drawing machine that can reliably detect wire breakage of a wire material when drawing the wire material with a wire drawing machine. To aim.

[0004]

The wire breakage detector of the wire drawing machine of the present invention for solving the above-mentioned problems is a wire drawing machine for drawing a wire supplied from a wire supplying device with a die. A wire breakage detector for a wire drawing machine, in which a conductor is arranged so that the wire breakage ends of the wire material come into contact with each other when the wire material breaks, and the wire material breakage is detected by the electrical continuity between the wire material and the conductor. In, the conductor is a tubular body arranged so that the wire rod passes therethrough.

[0005]

In the wire breakage detector of the wire drawing machine of the present invention, the conductor is a tubular body arranged such that the wire rod passes through it. Therefore, when the wire is broken, the broken wire end portion always contacts with any part of the tubular body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a wire drawing machine in which a wire breakage detector is installed. Reference numeral 1 is a copper alloy wire (wire material) supplied to the wire drawing machine, and reference numeral 2 is a copper alloy wire supply stand for supplying the copper alloy wire 1. (Wire feed device). The copper alloy wire 1 supplied from the copper alloy wire supply stand 2 is continuously supplied in one state to a wire drawing step for drawing the copper alloy wire 1 and a finishing step in which polishing or the like is performed. It has become so. As shown in FIG. 1, this wire drawing machine includes a copper alloy wire supply stand 2 for supplying a copper alloy wire 1 and a plurality of different diameters for drawing the copper alloy wire 1 supplied from the copper alloy wire supply stand 2. Dice 3
a, 3b, 3c, 3d and these dice 3a, 3b, 3
The dies 3a, 3b, and 3 are arranged adjacent to c and 3d.
a plurality of drums 4a for winding the copper alloy wire 1 drawn by c and 3d and applying tension to the copper alloy wire 1.
4b, 4c, 4d. In this case, the copper alloy wire 1 drawn by the die 3d is wound around the drum 4d, then wound around the guide pulley 8 which is arranged at a certain distance from the drum 4d, and then wound around the drum 4d again. It is rotated and supplied to the finishing process.

Disconnection detectors 5a, 5b and 5c are provided near the drums 4a, 4b and 4c, respectively, and a disconnection detector 5d is provided between the drum 4d and the guide pulley 8. The disconnection detectors 5a, 5b, 5c are made of metal plates (conductors) arranged so that the disconnection ends contact each other when the copper alloy wire 1 is disconnected. Disconnection detector 5
d is a copper alloy wire 1 between the drum 4d and the guide pulley 8
2 is disposed in the vicinity of the supply path, and as shown in FIG. 2, it is composed of a metal cylindrical body 6 supported by a support member 7 composed of synthetic resin support blocks 7a and 7b. The copper alloy wire 1 directed to 4d passes through the center of the cylindrical body 6. Disconnection detectors 5a, 5
Each metal plate b, 5c and the cylindrical body 6 of the disconnection detector 5d
Is a part of an electric circuit in which a relay (not shown) is interposed with the copper alloy wire 1, and when the copper alloy wire 1 comes into contact with any of these metal plates and the cylindrical body 6, An electrical conduction state is obtained, which drives the relay, and the operation of the wire drawing machine and the winding device is stopped by driving the relay.

Next, the disconnection detectors 5a, 5b having the above-mentioned configuration,
The operation of the wire drawing machine equipped with 5c and 5d will be described. In the copper wire production line, the copper alloy wire 1 wound around the copper alloy wire supply stand 2 undergoes a wire drawing step and a finishing step, and is finally wound up by a winding device (not shown). In the wire drawing step, as shown in FIG. 1, the copper alloy wire 1 supplied from the copper alloy wire supply stand 2 is drawn by the die 3a, and the drawn copper alloy wire 1 is pulled by the rotation of the drum 4a. The copper alloy wire 1 wound around the drum 4a and fed from the drum 4a is drawn by a die 3b, and the drawn copper alloy wire 1 is pulled by the rotation of the drum 4b and wound around the drum 4b. , Copper alloy wire 1 fed from drum 4b is die 3c
Is drawn. The copper alloy wire 1 drawn by the die 3d is
It is guided by the drum 4d, stretched between the drum 4d and the guide pulley 8, and supplied to the finishing process.

In such a wire drawing process, the drum 4
When the copper alloy wire 1 is broken near a, 4b, 4c, the copper alloy wire 1 is swung by the rotation of the drums 4a, 4b, 4c, and the broken wire ends are broken wire detectors 5a, 5b.
5c is brought into contact with each metal plate to be in an electrically conductive state, disconnection is detected, and the operation of the wire drawing machine is stopped based on the detection result. On the other hand, when the copper alloy wire 1 drawn in a small diameter by the die 3d is broken after passing through the die 3d, for example, between the drum 4d and the guide pulley 8, the copper drawn to the finishing process side is drawn. The tensile force of the alloy wire 1 is released, and the disconnection end of the copper alloy wire 1 hangs downward due to its own weight. At this time, since the copper alloy wire 1 passes through the inside of the cylindrical body 6 of the disconnection detector 5d, the disconnection end portion contacts the inner surface of the cylindrical body 6. Therefore, in this way, the copper alloy wire 1 comes into contact with the inner surface of the cylindrical body 6 and becomes electrically conductive, a wire break is detected, and the operation of the wire drawing machine and the winding device is stopped based on the detection result. .

When a wire breakage detector of the wire drawing machine having the above-mentioned structure detects a wire breakage, the drums 4a, 4b, and 4c have
Since the drawn copper alloy wire 1 has a large diameter and rigidity,
When the copper alloy wire 1 is disconnected, disconnection detectors 5a, 5b, 5
The disconnection ends can contact the respective metal plates of c to detect the disconnection. In the vicinity of the drum 4d, the copper alloy wire 1 passes through the inside of the cylindrical body 6 of the disconnection detector 5d even if the diameter of the copper alloy wire 1 is small and the rigidity thereof is small.
When the wire breaks, the wire break end is always in contact with any part inside the cylindrical body 6, and the wire break is detected.

In the above embodiment, the wire drawing machine and the winding device are stopped when the wire breakage detector detects the wire breakage. With this structure, however, when the wire breakage is detected. Alternatively, these may be displayed on a display or an alarm sound may be emitted by a buzzer or the like.

[0012]

The wire breakage detector of the wire drawing machine of the present invention is a tubular body in which the conductor is arranged so that the wire rod passes through. Therefore, when the wire is disconnected, the disconnection end portion always comes into contact with the cylindrical body and the disconnection can be detected, and the disconnection can be reliably detected. Further, since the structure is simple, the device can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention and is a schematic view of a wire drawing machine equipped with a wire breakage detector according to the present invention.

FIG. 2 is a perspective view of a main part of the disconnection detector.

[Explanation of symbols]

 1 Copper alloy wire 2 Copper alloy wire supply stand 3a, 3b, 3c, 3d Dies 4a, 4b, 4c, 4d Drums 5a, 5b, 5c, 5d Disconnection detector 6 Cylindrical body

Claims (1)

[Claims] 1. A wire drawing machine for drawing a wire rod supplied from a wire rod supply device with a die, and a conductor is disposed so that the wire breakage end of the wire rod comes into contact with the wire drawer when the wire rod is broken. A wire breaker of a wire drawing machine for detecting a wire breakage of the wire by an electrical conduction state between the wire and the conductor, wherein the conductor is a tubular body arranged so that the wire passes through it. Characteristic wire breaker detector.