JP3341854B2 - Traveling wire diameter measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the diameter of a traveling wire, and more particularly to a device for measuring the diameter of a long wire having a circular cross section, such as a wire after rolling, at a high speed. The present invention relates to an improvement in a diameter measuring apparatus which can perform a diameter measurement in a plurality of circumferential directions as close as possible to the same cross section of the wire so that measurement can be performed without any trouble even in a state.

[0002]

2. Description of the Related Art For precision rolling of a wire represented by a steel wire, for example, the wire is required to have a high tolerance of about 0.1 mm in diameter, and the diameter is measured during running in a hot state immediately after rolling. Need to be implemented. As a device for measuring the diameter of the traveling wire, a light emitting source such as a lamp and a light receiving light source such as a CCD image sensor are arranged in opposition to each other, and the light emitting source is arranged between an optical axis connecting the light emitting source and the light receiving light source. Means are known in which a wire to be measured is interposed, and the diameter of the wire is calculated based on the light blocking width of the wire caught by the light receiving and receiving source. The measurement of the diameter of the running wire needs to be performed from any direction of the peripheral surface of the wire. Therefore, in a fixed diameter measuring device in which a light emitting source and a receiving light source are fixedly provided with a running path of a wire interposed therebetween, a large number of such devices are arranged in a circumferential direction of the wire, and the diameter is measured. Will do it.

For this reason, a rotary diameter measuring device as shown in FIG. 4, for example, has been put into practical use so that a single diameter measuring device can measure the diameter of a traveling wire at many points in the circumferential direction. This device is used for a traveling wire 1 to be measured.
A rotating disk 12 that freely rotates around the wire 10 around the travel path 0, and is provided at a required position in one radial direction of the rotating disk 12, and irradiates a light beam toward the wire 10 A light receiving source 16 such as a CCD image sensor provided at a required position in the other radial direction of the rotating disk 12 and opposed to the lamp light source 14 with the wire 10 interposed therebetween. And a calculating means 18 for calculating the diameter of the wire 10 based on the light caught by the light receiving and receiving light source 16.
In addition, between the lamp light source 14 and the wire 10, a lens 20 that converts the diffused light into parallel light and irradiates the wire 10
Is disposed, and a lens 22 for imaging the parallel light is disposed between the wire 10 and the light receiving and receiving light source 16.

When the diameter is measured, the rotating disk 12 is rotated, and the light from the lamp light source 14 is caught by the light receiving and receiving light 16 after being blocked by the wire 10.
The light receiving light source 16 adjusts the width of the received light to the wire rod 10.
Is converted into an electric signal corresponding to the light-shielding width of the wire rod, and the diameter calculating means 18 measures the diameter of the wire rod 10 in real time based on this signal. As described above, in the rotary type diameter measuring device, the lamp light source 14 and the light receiving
Since the wire 10 rotates around 0, any diameter of the wire 10 in the circumferential direction can be measured.

[0005]

In the conventional rotary type diameter measuring apparatus described above, a light bulb having a filament such as a halogen lamp is used as the light source 14, and a light source between the receiving light source 16 and the diameter calculating means 18 is used. The contact-type slip ring (not shown) is used for the transmission and reception of the electric signal. The rotating disk 12 of the apparatus is rotated at a rotation speed of, for example, about 200 rpm. However, in recent years, the wire speed at the time of precision rolling of the wire 10 having a diameter of 5.5 mm has reached a high speed of 100 m / sec at the maximum. For this reason, when the diameter of the wire 10 is measured by the rotating disk 12 rotating at about 200 rpm, the wire 10 is 30 m long while the disk 12 makes one rotation.
Will also proceed. This means that the diameter measurement of different peripheral surfaces of the wire 10 can be performed only every 30 m. Ideally, a profile of the wire 10 in a state close to the same cross section is required, so that it is desirable to be able to measure diameters in different circumferential directions in as short a time as possible.

For this purpose, it is necessary to rotate the rotating disk 12 at a high speed as much as possible and to measure the diameter of the wire 10 in different circumferential directions as close as possible to the same cross section. However, in the conventional diameter measuring device, when the rotating disk 12 is rotated at a high speed, an excessive centrifugal force is applied to the halogen lamp 14 disposed on the disk 12, and therefore, the filament of the lamp 14 is broken or broken. Or 200
It was not possible to increase the number of revolutions more than about rpm. When the rotational speed of the rotating disk 12 is increased, noise is generated in transmission and reception of a signal between the slip ring that electrically couples the light receiving and receiving light source 16 and the diameter calculating means 18, and further, the mechanical life is increased. Also has the drawback of being shorter.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the various disadvantages inherent in the traveling wire diameter measuring apparatus according to the prior art described above, and has been proposed in order to preferably solve the problem. The present invention provides a means for enabling a good measurement of the diameter of a long wire material forming a long wire under a condition in which the wire material travels at a high speed, and realizing the diameter measurement in a plurality of circumferential surface directions as close as possible to the same cross section of the wire material. The purpose is to do.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to appropriately achieve the intended purpose, the present invention provides a method for moving a long wire traveling at a high speed around the wire. A rotating disk that freely rotates, a light source that is provided at a required position in one radial direction of the rotating disk, and irradiates a light beam toward the wire, and a light source that emits light toward the other radial position of the rotating disk. A traveling light source provided with a light receiving source that is provided to face the light source and receives a light beam arriving beyond the wire, and a calculating unit that calculates a diameter of the wire based on a light blocking width received by the light receiving source. In the diameter measuring device, the rotating disk is rotated from 200 rpm to 1800 rpm.
When rotating at a high speed in the range of m., a semiconductor light source represented by a light emitting diode is used as the light source.
A light receiving rotating about said wire together with said rotary disk
The electric signal converted at the source is fixed via a rotary transformer
It characterized by being configured to supply to said calculating means provided on the side.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a traveling wire diameter measuring apparatus according to the present invention. The same members as those described with reference to FIG. 4 are designated by the same reference numerals. As described above, in the rotary type diameter measuring device, when the disk is rotated at a high speed, a large centrifugal force is applied to the light source, and the filament of the lamp used as the light source is broken and broken. Therefore, in the present invention, a semiconductor light source such as a light emitting diode (LED) or a semiconductor laser is used as a light source that does not need to use a filament and can withstand a large centrifugal force. FIG.
1 is a longitudinal section of a diameter measuring apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a left side view of FIG. 1 as viewed from the direction of line 2-2. The light emitting diode is basically
As shown in FIG. 2A, a single configuration may be used. However, if the amount of light is insufficient, a plurality of light emitting diodes may be provided in parallel as shown in FIG. 2B. The diameter measuring apparatus according to this embodiment is used for measuring the diameter of a wire 10 having the following specifications immediately after precision rolling. Wire diameter: 5.5mm Wire running speed: 100m / sec Wire temperature: about 1000 ° C

In FIG. 1, reference numeral 24 denotes a fixed base which forms a main body of the diameter measuring device, and a through hole 26 for allowing the passage of the wire 10 is formed in the fixed base 24 horizontally. The inner diameter of the through hole 26 is set to be sufficiently larger than the diameter of the wire 10, and a hollow rotary shaft 30 is rotatably supported inside the through hole 26 by a pair of left and right bearings 28, 28. ing. Inside the fixed base 24, a disk-shaped large-diameter space portion 32 is formed at right angles to the through hole 26, and inside the large-diameter space portion 32, a left end portion of the rotating shaft 30 (see FIG. The rotating disk 12 formed in a flange shape in 1) can be accommodated in a non-contact manner. The other end of the hollow rotary shaft 30 extends outward to the right of the fixed base 24,
A pulley 34 is disposed at the right end (FIG. 1). Furthermore, the pulley 3 of the motor 36 disposed on the fixed base 24
The belt 40 is wound around the pulley 8 and a pulley 34 provided on the hollow rotary shaft 30. Accordingly, when the motor 36 is driven, the hollow rotary shaft 30 and the rotary disk 12 supported by the bearings 28 and 28 in the fixed base 24 are integrally rotated in a required direction.

A rotating shaft 30 pivotally supported inside the fixed base 24.
A heat-resistant sleeve 42 is disposed in parallel with the hollow portion so as to be out of contact with the hollow portion, and the wire 10 in a high-temperature state can run horizontally at high speed inside the sleeve 42. Also, inside the fixed base 24, for example, four disk-shaped small-diameter spaces 44 are formed at required intervals along the through-holes 26 at right angles to the through-holes 26. Can accommodate the elements of the rotary transformer described later. Further, as shown in FIG. 1, a light source 14 (described later) is provided between the through hole 26 in the fixed base 24 and the hollow rotary shaft 30.
And a pair of slip rings 46 for supplying electric power to an electric circuit (not shown) of the light receiving / receiving light source 16.

FIG. 2 (b) is obtained by observing FIG. 1 from the direction of the line 2-2.
As can be seen from FIG. 2B and FIG. 3 in which the rotating disk 12 is viewed from the side, the rotating disk 12 has a light source in substantially the same relation as described above with reference to FIG. 14 and a light receiving / receiving light source 16 are disposed at radial positions opposed to each other with the wire 10 interposed therebetween. In this embodiment, the light source 14
A light emitting diode (LED) is used as an image sensor, and an image sensor (CCD) that converts image data into an electric signal is used as the light receiving light source 16. However, the currently available light emitting diode 14 has a light diffusion angle of 8 ° and is about 2000 milli-candela (mcd). This luminous intensity is based on the image sensor (CC
D) is almost the limit of the light receiving sensitivity when the scanning speed is high (0.5 ms / scan). Therefore, when this is directly expanded into parallel rays by a lens as in the conventional example of FIG. Insufficient sensitivity will result. Therefore, in the present embodiment, the light emitting diode 14 is linear (array).
In addition, the light from each diode 14 is focused at the focal position and then expanded into parallel rays, thereby compensating for the insufficient light quantity that is inferior to the conventional halogen lamp alone. .

In FIG. 2B, the light emitting diode 14 is
A large number of arcs are arranged at predetermined positions on the surface of the rotating disk 12, and between the respective light emitting diodes 14 and the wires 10, the diffused light is converted into parallel rays as described with reference to FIG. A lens 20 for irradiating the wire 10 is provided. Further, on the surface of the rotating disk 12 and between each light emitting diode 14 and the parallel light lens 20,
A semi-cylindrical lens 48 having a semicylindrical shape is provided. The semi-cylindrical lenses 48 are provided corresponding to the respective light-emitting diodes 14, and a large number of semi-cylindrical lenses 48 are also arranged inside the arc-shaped light-emitting diode group 14 in the same arc. That is, each light emitting diode 14
The diffused light emitted from at a diffusion angle of 8 ° is focused on a focal point F located on the near side of the wire rod 10 by a semi-cylindrical lens 48 provided correspondingly on the optical axis of each diode 14. In the embodiment, ten light emitting diodes 14
Are provided in an arc shape, so that ten diffused lights are concentrated on the focal point F by the ten semi-cylindrical lenses 48 in total. The light once concentrated at the focal point F is diffused at an angle of 66.5 ° and passes through the lens 20 as shown in FIG. 2B, where it is converted into parallel light and applied to the traveling wire 10. You. After being blocked by the wire 10, the parallel light is caught by the light receiving and receiving light source 16 as in the case shown in FIG. 4, and the diameter of the wire 10 is calculated by the diameter calculating means 18 based on the light blocking width. . If the light amount of the light emitting diode 14 is sufficient as described above, it is desirable that the number of light emitting diodes is one as shown in FIG.

As described above, in this embodiment, since the light emitting diode is used as the light source 14, the rotating disk 14 is used.
For example, even if the LED is rotated at a high speed of about 1800 rpm, the lighting of the diode is not disabled due to the centrifugal force at the time of high speed rotation. The power supply to the electric circuit of the light emitting diode 14 and the image sensor (CCD) 16 can be suitably performed by the slip rings 46, 46 described with reference to FIG. An image sensor that is a light source
The supply of the electric signal from the (CCD) 16 to the diameter calculating means 18 is performed by the rotary transformer 50 shown in FIG. The rotary transformer 50 includes a first disk printed with a primary coil and a second disk printed with a secondary coil.
Non-contact electric signal on the primary side by induced current generated by rotating the primary side coil with respect to the other secondary side coil by opposing arrangement on the same axis with a narrow gap. At the secondary side. That is, in FIG. 1, a second disk 52 having a secondary coil printed thereon is disposed on a vertical wall surface of a small-diameter space portion 44 formed at right angles to the through hole 26. Further, a first disk 54 having a primary coil printed thereon is concentrically arranged on the rotating shaft 30, and the first disk 54 faces the second disk 52 via a narrow gap. The primary coil of the first disk 54 is connected to an output circuit (not shown) of the image sensor (CCD) 16.
The secondary coil of the second disk 52 is connected to the diameter calculating means 18 via a lead wire.

[0015]

When the diameter of the wire 10 is measured,
In FIG. 1, the motor 36 is driven to rotate the rotating disk 12 in a required direction by the belt 40. The power is supplied to each of the light emitting diodes 1 through the slip rings 46, 46.
4, the diffused light emitted from the light emitting diodes 14 at a diffusion angle of 8 ° is concentrated at the focal point F by a semi-cylindrical lens 48 provided corresponding to each diode 14. The light focused at the focal point F is shown in FIG.
As shown in (b), the light diffuses and passes through the lens 20, where it is converted into parallel light and irradiated on the traveling wire 10. The parallel light is caught by the light receiving and receiving light 16 after being blocked by the wire 10, and the diameter of the wire 10 is calculated by the diameter calculating means 18 based on the light blocking width. In this embodiment, since the light emitting diode 14 is used as a light source, even if the rotating disk 12 is rotated at a high speed of, for example, about 1800 rpm, the centrifugal force generated at that time turns on the diode 14. Will not be disabled. In addition, the diameter calculation means 1 is provided from the image sensor (CCD) 16.
The supply of the electric signal to 8 is performed by the rotary transformer 50. Therefore, even if the rotating disk 12 rotates at a high speed, noise is not superimposed on the electric signal, so that accurate calculation by the diameter calculating means 18 is not hindered. In the embodiment, the case where the light emitting diode is used as the light source 14 has been described, but a semiconductor laser may be used as long as the semiconductor light source does not use a filament that breaks due to centrifugal force.

[0016]

As described above, according to the traveling wire diameter measuring apparatus of the present invention, even if the rotating disc is rotated at a high speed,
Since the semiconductor light source is not affected by the centrifugal force generated by this, the diameter of a long wire having a circular cross section, such as a rolled wire, must be measured under conditions where the wire travels at high speed. Can be. That is, even when the wire to be measured travels at a high speed, the disk on which the light source and the light receiving / receiving light source are mounted can be rotated at high speed around the wire, so that the circumferential direction is close to the same cross section of the wire. Can be measured at a plurality of locations.

[Brief description of the drawings]

FIG. 1 is a longitudinal section of a diameter measuring apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a left side view of FIG. 1 as viewed from the line 2-2.

FIG. 3 is a plan view of the vicinity of the rotating disk shown in FIG.

FIG. 4 is a side view of a rotary diameter measuring device according to the related art, observed from a direction perpendicular to a running direction of a wire as a measurement target.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Long wire 12 Rotating disk 14 Light source 16 Light receiving / receiving light 18 Diameter calculating means 50 Rotary transformer

Claims (1)

(57) [Claims] 1. A rotating disk (12) which freely rotates around a running path of a long wire (10) running at a high speed around the wire (10); A light source (14) provided at a required position in one radial direction and irradiating a light beam toward the wire (10), and the light source provided at a required position in the other radial direction on the rotating disk (12) A light receiving source (16) that receives a light beam arriving beyond the wire (10), facing the (14).
And a calculating means (18) for calculating the diameter of the wire (10) based on the light blocking width received by the light receiving and receiving light source (16 ). From 200 rpm to 1800 rpm.
m In the range of. rotated at high speed, using a semiconductor light sources typified by light emitting diodes Examples source (14)
Together with the rotating disk (12) to rotate around the wire (10).
The electric signal converted by the light receiving light source (16) is
To the calculation means (18) provided on the fixed side via
A diameter measuring device for a traveling wire rod having a configuration as described above.