JP2001341941A - Sagging quantity detecting device of wire rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of detecting a sagging quantity of a wire rod without using a mechanism such as a dancer pulley for moving while contacting with the wire rod. SOLUTION: A noncontact analog distance sensor is opposed in the sagging lower limit direction of a sagging part of the wire rod by using a motor-driven grooved pulley pullable by specific tensile force so as not to receive influence of a pretreatment process on a front side grooved pulley of front and rear grooved pulleys for sending the wire rod into a winder while guiding the wire rod and setting the sagging part of the wire rod, and a signal on an increase- decrease in a sagging quantity of the wire rod detected by this sensor is sent to a rotatably driving variable speed motor of the winder. An upper limit grooved pulley for guiding the wire rod from the opposite side of the sagging direction is preferably arranged in a sagging upper limit position of the wire rod of the sagging part of the wire rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a slack amount of a wire to be wound in a wire drawing machine, a rolling mill, an extruder, and the like, and more specifically, to a winding machine. The present invention relates to an apparatus for detecting a slack amount of a wire rod when controlling a winding speed of a wire rod based on a detection result of a slack amount of a wire rod to be wound.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional apparatus for detecting the amount of slack in a wire. When the wire 1 is wound by a winder 6 while being fed by a grooved pulley 2, the slack of the wire 1 is obtained. As a mechanism for controlling the amount to be constant, a slack portion is set between the front and rear grooved pulleys 2 and 2, a dancer pulley 4 is provided in this portion, and the dancer pulley 4 is attached to the pulley 4 via a rod. The potentiometer 3 is linked to a rotating shaft between the balance weight 5 and the output from the potentiometer 3 to a winder 6.
Is sent to the rotary drive variable speed motor 6a.

[0003] The procedure for detecting the slack amount of the wire 1 and controlling the slack amount of the wire 1 are described below. According to the balance with the balance weight 5 attached to the side, the dancer pulley 4 is moved up and down as indicated by 4 'to 4''in the figure according to the change in the slack amount of the wire 1 (the balance weight 5 is also 5' to 5 '). ''), Whereby the potentiometer 3 linked to the rotating shaft is driven to rotate, and a speed command signal is sent to the variable speed motor 6a based on a detection signal corresponding to the amount of rotation of the potentiometer 3 at this time. The winding speed is adjusted by the variable speed control of the variable speed motor 6a, so that the slack amount of the wire 1 is made constant.

[0004]

According to the conventional wire slack detecting device shown in FIG. 3, (1) tension is applied to the wire 1 by the weight of the balance weight 5 and the dancer pulley 4, and the wire is Causing elongation in 1,
(2) Since the dancer pulley 4 moves greatly up and down, it affects the drawing, rolling, and extrusion of the previous process,
There is a problem that the wire 1 can be scratched,
Includes factors for product failure.

Therefore, an object of the present invention is to use a mechanism such as a dancer pulley which moves while contacting a wire, without using a mechanism.
It is an object of the present invention to provide a device capable of detecting a slack amount of a wire.

[0006]

Means provided by the present invention are: a device for detecting the amount of slack of a wire rod for guiding the wire rod to a winding machine and for setting a slack portion of the wire rod; The grooved pulley on the front side uses an electrically driven grooved pulley that can be pulled with a constant tension so that it is not affected by the pretreatment process. The distance sensor faces each other, and a signal relating to the increase or decrease in the slack amount of the wire detected by this sensor is sent to the variable speed motor for rotationally driving the winding machine.

As described above, the distance to the slack portion of the wire is detected and measured by the non-contact analog distance sensor; by measuring, the sensor can detect an increase or decrease in the amount of slack in the wire. A signal relating to the increase or decrease of the slack amount is sent to a variable speed motor for driving the winder. The electrically driven grooved pulley is linked to a rotating mechanism that is driven electrically, and guides the wire with a constant tension in the direction of the pass line. By making the electrically driven grooved pulley and the grooved pulley freely rotatable, it is possible to prevent the wire guided by these from being damaged badly.

It is desirable to provide an upper limit grooved pulley for guiding the wire from the side opposite to the slack direction at an upper limit position of the wire slack at the slack portion of the wire. By making this upper limit grooved pulley freely rotatable, it is possible to prevent the wire guided by the groove from becoming defective. Further, by providing the upper limit grooved pulley, the slack direction of the wire can be limited to the lower limit direction.

[0009]

FIG. 1 schematically shows an embodiment of an apparatus for detecting a slack amount of a wire according to the present invention.
The front pulleys 7 of the grooved pulleys 7 and 2 provided before and after the slack portion are electrically driven grooved pulleys, and a guide is provided between the pulleys from the opposite side of the slack direction of the wire 1. And a non-contact analog distance sensor 8 facing the lower limit direction of the slack portion of the wire 1. The output signal of the non-contact analog distance sensor 8 is provided. Is sent to the variable speed motor 6a for rotational drive of the winding machine 6.

The operation of the apparatus for detecting the amount of slack of a wire rod according to this embodiment having the above-described configuration will be described. The pulley 7 with a driven groove that guides the wire rod 1 feeds the wire rod 1 with a constant tension. It will not be pushed back to the processing step. In this way, as shown in FIG. 2, the wire 1 fed out with a constant tension is slackened downward as shown in FIG. 2 and then wound up by the winder 6. . With respect to the wire rod 1 slackened in this way, the pulleys 9 with the upper-limit groove limit the slack direction to the lower side.

In FIGS. 1 and 2, the wire 1 and the grooved pulleys 2, 7, and 9 are shown in a non-contact state, but actually, the wire 1 is in contact with these pulleys (the pulley). No. 9 is in contact only with the upper limit wire).

The wire 1 slackened as described above.
, The distance (slack amount) to the slack portion is detected by the non-contact analog distance sensor 8; measured, a speed command signal is output from the sensor 8 according to the detected distance, and the winder To the variable speed motor 6a for rotational drive,
The variable speed motor 6a whose rotation speed is controlled by a speed command signal corresponding to the detected distance,
By controlling the rotation of the winding machine 6, the winding speed for the wire 1 is controlled.

[0013]

As described above, according to the present invention, there is provided an apparatus capable of detecting the amount of slack of a wire without using a mechanism such as a dancer pulley which moves while contacting the wire. Problem: The purpose can be achieved, and the effect of implementing this is significant.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a slack amount detecting device for a wire rod according to the present invention.

FIG. 2 is an explanatory view of a main part showing conditions of a slack amount in the apparatus in FIG.

FIG. 3 is a schematic explanatory view showing an example of a conventional wire rod slack amount detection device.

[Explanation of symbols]

 Reference Signs List 1 wire rod 2 grooved pulley 6 winder 6a variable-law motor 7 driven grooved pulley 8 non-contact analog distance sensor 9 upper limit grooved pulley

Claims (2)

[Claims] In a device for providing a slack portion of a wire between front and rear grooved pulleys in a step of winding a wire fed by a grooved pulley by a winder, and detecting a slack amount of the wire. Use of an electrically driven grooved pulley that can be pulled with a constant tension so that it is not affected by the pretreatment process on the front grooved pulley of the front and rear grooved pulleys. An apparatus for detecting a slack amount of a wire rod, wherein an analog distance sensor is opposed to the sensor, and a signal regarding an increase or a decrease in the slack amount of the wire rod detected by the sensor is sent to a variable speed motor for rotationally driving the winding machine. 2. The apparatus according to claim 1, wherein an upper limit grooved pulley for guiding the wire from the side opposite to the direction of the slack is provided at an upper limit position of the slack in the slack portion of the wire.