JP2578724B2 - Outer diameter measuring device such as ERW pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer diameter measuring apparatus which is installed on a production line of an electric resistance welded pipe or the like and measures the appropriateness of the outer diameter.

[0002]

2. Description of the Related Art In general, for example, a production line of an electric resistance welded pipe is
It comprises the steps of uncoiler, hood gauge, forming roll, weld, sizing roll, and cutting. Then, during such a process, a strip-shaped steel plate having a required width is formed into a tube in a forming roll, and the seam is welded at a welded portion. Cut,
This is to make an ERW pipe. By the way, in the production line of such an electric resistance welded pipe, at the start of the line, the outer diameter and the like are frequently measured and inspected so as to adjust the welded portion and the sizing roll to the predetermined outer diameter and quality. There is a need. In addition, even when the product is finished, it is necessary to measure and inspect the finished outer diameter and quality of the product because the outer diameter and quality sometimes change due to various factors and affect the finished product. It is. For this reason,
In order to measure the outer diameter of an ERW pipe product, a method is generally used in which a sample is appropriately extracted from the ERW pipe product and the outer diameter is manually measured with a caliper or the like.

[0003]

However, when measuring the outer diameter of the ERW pipe with a caliper or the like as described above,
Although the measurement can be performed reliably, it is very troublesome and troublesome due to manual operation. Moreover, the measurement using a caliper or the like does not measure the finished outer diameter during the manufacture, but only the outer diameter of the product itself after the manufacture, so the product outer diameter should not deviate from the reference outer diameter value. In addition, when it is necessary to adjust a required manufacturing process, the response is likely to be delayed, and it is easy to cause inconvenience in terms of quality and cost.

In order to solve the drawbacks of the measurement using a caliper or the like, measurement devices of a displacement type, a transmission type, a reflection type, or the like using a light and laser system have been proposed. Because a large amount of lubricant is used during the production of the product, oil droplets and iron powder are easily scattered and adhere to the light-emitting surface and light-receiving surface during the operation of the production line, and measurement errors are very likely to occur. However, it is not practical.

SUMMARY OF THE INVENTION The present invention solves the problems of the prior art at a glance, and is installed in an ERW pipe production line to automatically, quickly and surely measure the finished outer diameter of an ERW pipe for inspection. It is intended to provide an outer diameter measuring device such as an electric resistance welded tube capable of performing the above.

[0006]

That is, according to the present invention, a pair of movable frames 2 on both sides are arranged on a base 1 via a feed mechanism 3 so as to be capable of adjusting a distance therebetween. Measuring members 8 each having a measuring roll 13 at the front end are movably opposed to each other, and each of the measuring members 8 is urged in the opposite direction via an urging member 12, and one of the measuring members 8 is measured. A detection bar 16 of a required length is attached to the member 8 so as to be movable and adjustable in the direction of the feed mechanism 3, and a detection plate 19 fixed to the tip of the detection bar 16 is mounted to the other measuring member 8. It has a configuration in which a detection sensor 22 for detection is attached.

[0007]

[Function] Installed in ERW pipe production line, feed mechanism 3
Is operated to properly adjust the interval between the movable frames 2, and then the measuring member 8 is moved to set the interval between the measuring rolls 13 to the electric resistance welded tube 2.
The detection bar 16 is moved so that the detection plate 19 coincides with the predetermined reference value, while the reference outside diameter value of 3 is matched. Thereafter, the measuring rolls 13 on both sides are brought into contact with the finished outer peripheral surface of the electric resistance welded tube 23 by the urging of the urging member 12 so as to be clamped. Then, the measuring roll 13 is moved to the urging member 12 while adjusting to the outer diameter of the finished electric resistance welded tube 23 running at a required speed.
The detection bar 16 is swung in the direction of the detection sensor 22 by the measuring member 8 which swings in conjunction with the detection member 19, and the detection plate 19 is detected by the detection sensor 22. The finished outer diameter of the ERW pipe 23 is measured.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an elongated, substantially plate-shaped base that can be freely installed on an electric resistance welded pipe production line; 2, a pair of movable frames slidably disposed on both sides of the base 1; The feed mechanism 3 is composed of a feed screw shaft 6 having a right screw portion 4 and a left screw portion 5 engraved thereon, and a female screw member 7 for screwing the feed screw shaft 6 together. It is configured. Reference numeral 8 denotes a substantially frame-shaped measuring member slidably disposed on each of the movable frames 2 via a pair of sliding mechanisms 9 on both sides, and 10 slides the measuring member 8 via a connecting member 11. A fluid pressure cylinder 12 mounted on each movable frame 2 for biasing each measuring member 8 in the opposite direction, such as a biasing member such as a spring material interposed between the measuring member 8 and the movable frame 2; Reference numeral 13 denotes a measurement roll that is rotatably provided to face the upper end of each measurement member 8. 14
Reference numeral 16 denotes a mounting plate provided downward on one side of the measuring member 8, and reference numeral 16 denotes a long screw portion 17 attached to a lower end of the mounting plate 14 via a female screw member 15 having a set screw 27.
With the detection bar, the detection bar 16 is screwed to the female screw member 15 so as to be movable along the feed screw shaft 6 direction. Is screwed. Reference numeral 19 denotes a metal detection plate fixed to the tip of the detection bar 16, and reference numeral 20 denotes a detection bar.
A transparent cylinder mounted on the other measuring member 8 via a mounting plate 21 to slidably store and hold the tip of
Reference numeral 2 denotes a detection sensor such as a metal displacement sensor provided inside the cylinder 20 to correspond to the detection plate 19 of the detection bar 16. In addition, reference numeral 23 denotes an ERW pipe, and 24 denotes a substantially E-shaped test gauge.
3, a reference outer diameter gauge 25 having the same length as the finished reference outer diameter, and a positioning gauge 26 having the same length as the reference interval value of the movable frame 2 are formed at the lower end thereof.

Next, the operation of the embodiment configured as described above will be described. First, after being installed in the electric resistance welded pipe production line, the set screw 27 and the set nut member 18 are loosened to make the detection bar 16 free. Thereafter, as shown in FIG. 4, the feed screw shaft 6 is operated while a predetermined test gauge 24 is interposed between the movable frames 2 to move the movable frame 2 to the positioning gauge 26 of the test gauge 24. Abut,
The distance between the movable frames 2 is properly maintained. Then, while operating the fluid pressure cylinders 10 to move the measuring members 8 on both sides in opposite directions, the measuring rolls 13 on both sides contact the reference outer diameter gauges 25 by the urging of the urging members 12 respectively. At first, the interval between the measurement rolls 13 is made to conform to a required finished outer diameter value. When the adjustment of the interval between the measurement rolls 13 is completed, the detection bar 16 is moved in the direction of the detection sensor 22 while being screwed into the female screw member 15, and the detection plate 19 is positioned at a predetermined reference point. It is fastened to the female screw member 15 by the screw 27 and the lock nut member 18 and fixed.

Thereafter, the measuring rolls 13 on both sides are brought into contact with the finished outer peripheral surface of the electric resistance welded tube 23 in a state of being clamped. Then, the electric resistance welded pipe 23 on the way of finishing running at a predetermined speed
As a result, the measuring roll 13 rotates, and swings together with the measuring member 8 against the urging member 12 in accordance with the finished outer diameter. Then, the detection plate 19 is moved through the detection bar 16 by the swing of the measuring member 8, and the movable detection plate 19 is detected by the detection sensor 22 while the electric resistance welding tube 2 is being detected.
3. Measure the finished outer diameter. When the finished outer diameter of the electric resistance welded pipe 23 deviates from the reference value, it is preferable to notify the abnormality by a required control device and appropriately adjust a required manufacturing process.

In the above-described embodiment, the feed screw shaft 6 and the female screw member 7 are shown as the feed mechanism 3. However, the present invention is not limited to this, and a fluid pressure cylinder or the like may be adopted. is there. In addition, the distance between the movable frame 2 and the measurement roll 13 is set to a reference value by a required test gauge 24. However, the present invention is not limited to this. At -16, a required scale may be engraved for each finished outer diameter of the electric resistance welded pipe to set a required reference value. Further, the measuring apparatus according to the present invention can be used not only by installing it on the production line of the electric resistance welded pipe 23 as described above, but also by fully applying it to the production line of other pipes. is there.

[0012]

According to the present invention, the base 1
On the upper side, a pair of movable frames 2 is disposed via a feed mechanism 3 so as to be able to adjust the distance therebetween. On each of the movable frames 2, a measuring member 8 having a measuring roll 13 at a front end is movably opposed. At the same time, each of the measuring members 8 is urged in the opposite direction via an urging member 12, and one of the measuring members 8 is provided with a detection bar 16 of a required length in the direction of the feed mechanism 3. The other measuring member 8 is attached to the detection bar
Since the detection sensor 22 for detecting the detection plate 19 fixed to the tip of the tube 16 is attached, the distance between the movable frame 2 and the measuring roll 13 is adjusted to the finished outer diameter of the electric resistance welded tube 23. After being set to a predetermined reference value, the measuring roll 13 is brought into contact with the finished outer peripheral surface of the electric resistance welded tube 23 by the urging of the urging member 12, so that the finished electric resistance welded tube 2 travels.
3 while being swung against the urging member 12 together with the measuring member 8 in accordance with the outer diameter of the detecting plate 1 through the detecting bar 16.
9 is moved, and the movable detection plate 19 is moved to the detection sensor-2.
2, the finished outer diameter of the ERW pipe 23 can be measured, and the measuring operation can be performed automatically, quickly, and reliably. In particular, since the present invention can be installed in the ERW pipe manufacturing line to measure the finished outer diameter of the ERW pipe 23, the abnormality of the ERW pipe 23 in the course of finishing can be detected and the specified outside can be immediately performed. The manufacturing process can be adjusted, and the manufacturing loss can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a front view showing a state where the distance between the measurement roll 13 and the movable frame 2 is set to a reference value by a test gauge 24.

[Explanation of symbols]

 Reference Signs List 1 base 2 movable frame 3 feed mechanism 8 measuring member 12 biasing member 13 measuring roll 16 detection bar 19 detection plate 22 detection sensor 23 ERW pipe

Claims (1)

(57) [Claims] 1. A pair of movable frames 2 on both sides are arranged on a base 1 via a feed mechanism 3 so as to be capable of adjusting a distance therebetween, and each of the movable frames 2 has a measuring roll 13 at a front end thereof. The measuring members 8 are movably opposed to each other, each of the measuring members 8 is urged in the opposite direction via an urging member 12, and one of the measuring members 8 has a detection bar of a required length. A measuring sensor 16 is attached to the other measuring member 8 so as to detect a detecting plate 19 fixed to the tip of the detecting bar 16. An outer diameter measuring device such as an electric resistance welded tube.