JPH05285536A - Feeder for coil-type material - Google Patents

Abstract

PURPOSE:To reduce equipment cost in surface treatment, heat treatment, non- destructive inspection, etc., of a coil type material and to improve efficiency by transporting the material continuously, at a fixed speed without giving plastic deformation to the material. CONSTITUTION:The coil type tube stock 1 is hung on a cylindrical frame 2, the frame 2 is supported horizontally by receiving rolls 4 mounted on a guide frame 3 and material stopping plates 7 to accumulate tube stock 1 are provided at both ends of the frame. The frame 2 is rotated by a drive motor 9 through a chain 10 and a gear 8. A marking device to mark a part rejected by an eddy current flaw detector 11 is installed there. A wrapper guide 5b is equipped at the rear surface of the pinch roll 12b on the rearmost stage to transport an inspected tube stock 1 stably to the B-side of the frame 2. A sorting roll 6b is set on the guide frame 3 to prevent the tube stock 1 from being coiled to the wrapper guide 5b and the receiving roll 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeder for continuously performing shot blasting, pickling, surface treatment such as plating, heat treatment and non-destructive inspection of materials such as coiled pipes and wires. It is a thing.

[0002]

2. Description of the Related Art In recent years, materials such as coiled pipes and wires have become more versatile and higher in quality, and therefore the demand for quality has increased. In order to meet this demand, the material composition such as strength, toughness, workability and corrosion resistance is improved by component composition, heat treatment and surface treatment, and
Strictly inspecting for scratches, we are supplying pipes and wires that are free of defects.

Conventionally, for example, Meisenbach Gm
Wire (Vol.40, issued by bH (March 1990))
No. As shown on pages 279 to 281 in the document 2), in the all-round shot blasting of the coiled wire rod, the wire rod is placed on the screw conveyor one turn at a time, and the steel ball is rotated from every angle while rotating. Although this is a projection method, this method has a problem that the equipment becomes large and shot unevenness is likely to occur. For pickling, plating, and heat treatment, there is a method in which a coiled tube material and a wire material are put into a processing apparatus as they are, but there is a problem that processing unevenness occurs at a portion where materials overlap with each other.

The inspection of the coiled pipe and wire is generally carried out in a hot state before winding. The inspection in the hot state is performed by, for example, Iron and Steel (Vol.68, No.1) issued by Japan Iron and Steel Institute (August 20, 1982).
As shown on page 1153 of the document 2), it is generally performed by an eddy current flaw detection test, but the present situation is that the detection capability is lower than that in the inspection in the cold state. In order to cool the detection coil, insert a heat resistant material such as ceramic between the inspection material and the detection coil,
This is because the distance between the material to be inspected and the detection coil becomes larger because of cooling with water or the like compared to during cold flaw detection.

Conventionally, as means for inspecting a coiled material in the cold state over its entire length, Japanese Patent Publication No. Sho 58-49822 and the Japanese Society for Nondestructive Inspection (September 1, 1990) “Eddy Current Testing III As shown on pages 143 to 144 in the document entitled "", an ultrasonic flaw detection test and an eddy current flaw detection test are performed in the drawing process using a die. In this way, if flaw detection is performed after drawing the die, the roundness of the material to be inspected is significantly improved, and the surface texture is also improved, so that the detection capability is dramatically improved, but the inspection cost is increased. In addition, there are problems that it cannot be inspected immediately after rolling and that re-inspection with the same size cannot be performed because the tension of the material is held by the die and the winding machine.

As a means for inspecting a coiled material without plastically deforming it, conventionally, a method in which a coil is simply loosened and visually inspected is used, but it is necessary to be careful to determine whether or not there is a flaw. It took a lot of time, effort and effort. Moreover, when inspecting a material with a black scale, particular attention was required to determine the presence or absence of scratches.
Japanese Patent Publication No. 2-13743 is known as a method for visually inspecting a coiled material by magnetizing by a magnetic particle flaw detection method. In this method, magnetic particles cannot be applied over the entire circumference of the portions where the materials are in contact with each other and overlap each other, and further there is a problem that the processing capacity is low for visual inspection. Further, this method can in principle detect flaws only on magnetic materials, and cannot be applied to non-magnetic materials.

[0007]

SUMMARY OF THE INVENTION The present invention conveys materials such as coiled pipes and wire rods at a constant speed without plastic deformation, and shot blasting, pickling, installed in the middle of the feeding device. It is an object of the present invention to continuously and uniformly perform surface treatment and heat treatment on a material by a surface treatment device such as plating, a heat treatment device, and a nondestructive inspection device, and a highly accurate nondestructive inspection.

[0008]

In surface treatment, heat treatment and non-destructive inspection of materials such as coiled pipes and wires, a cylindrical mount for holding the material, a receiving roller for holding the mount, A guide frame that holds the receiving roller, a gantry drive motor that rotates the gantry, a sorting roll that prevents the coiled material from being caught in the wrapper guide, a wrapper guide that stably inserts the material tip into the pinch roll, and a material. It is a feeding device for a coiled material, which is composed of a plurality of pinch rolls for transporting the sheet and a pinch roll driving motor for rotating the pinch rolls.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings by taking an eddy current flaw detection test of a coiled tube as an example. 1 and 2 are a side view and a cross-sectional view (cross-section taken along line YY 'in FIG. 1) showing an overall configuration of a feeding device for a tubular material wound in a coil shape.
The coiled tubing 1 is hung on a cylindrical pedestal 2 and the pedestal 2
Is horizontally supported by a receiving roll 4 installed on the guide frame 3, and material stop plates 7 for accumulating the pipe materials 1 are provided at both ends thereof. The gantry 2 is rotated in the R direction via a chain 10 and a gear 8 by a gantry driving motor 9 installed on the guide frame 3. The tube material 1 is provided in the guide frame 3 with a sorting roll 6a for moving in the X direction and accumulating on the receiving roll 4a on the inlet side when the gantry 2 rotates.

A plurality of stages of pinch rolls 12 are arranged before and after the eddy current flaw testing device 11 provided at an intermediate position. The pinch rolls 12 are rotated by a pinch roll driving motor 13 via a chain 14 to fix the pipe material 1. Move in X direction. In order to convey the pipe material 1 at a constant speed in the eddy current flaw detection test equipment 11, the pinch roll driving motor 13 and the gantry driving motor 9 are synchronously rotated. A wrapper guide 5a is installed in front of the pinch roll 12 for stable insertion of the tip of the pipe 1 into the pinch roll 12.

Further, between the eddy current flaw detection test device 11 and the pinch roll 12 in the subsequent stage, a marking device 1 for marking a portion determined to be unacceptable by the eddy current flaw detection test device 11.
5 is attached. In order to stably convey the inspected pipe material 1 to the B side of the gantry 2, a wrapper guide 5b is installed on the rear surface of the last stage pinch roll 12b. Further, a sorting roll 6b is provided on the guide frame 3 in order to prevent the pipe material 1 from being caught in the wrapper guide 5b and the receiving roll 4b.

[0012] outer diameter D of the coiled tubing: 17.8Mmfai, wall thickness t: 2.3 mm, length L: 1000 m, an average diameter D _c of the coil: 1100 mm, steel type: the hole diameter φ carbon steel 0.6 ~
The material to be inspected was a through-drilled hole in the range of 5.0 mm. An eddy current flaw detector was used as the flaw detector. Detection coil inner diameter D _i : 20.5 mm, detection coil winding width w: 5 m
m, detection coil interval d: 2 mm, test frequency f: 8 kHz,
The pipe material was inspected at a conveying speed v of 60 m / min, and a flaw detection signal was recorded on the recorder. The judgment level of the marking device 15 is based on a through-drilled hole with a hole diameter φ of 1.0 mm.
The level was set to 0 dB lower.

First, a visual inspection was carried out in the coil state in order to confirm the presence or absence of scratches on the pipe material generated during transportation by the apparatus of the present invention, but no scratches were found. Furthermore, after visual inspection, the straight pipe is straightened with a straightening machine to 10m.
After cutting to length, a test was carried out under the above-mentioned flaw detection conditions by a general eddy current flaw detector to evaluate the detection characteristics. FIG. 3 is a diagram showing an example of the results of an eddy current flaw detection test by the method of the present invention and the conventional method, which is arranged based on the amplitude value of the recorder on the basis of the detection sensitivity of a through drill hole having a hole diameter φ of 1 mm. As a result, the detection sensitivity is almost at the same level when the coiled pipe material is inspected by the device of the present invention and the straight pipe is inspected by a general device, and the coiled pipe material is operated at high speed and high accuracy by a small device. It turned out that it can be inspected. In this embodiment, a non-destructive inspection device is applied to the feeding device, but a surface treatment device such as shot blasting, pickling, plating or a heat treatment device may be used instead.

[0014]

According to the present invention, as compared with the conventional feeding device, the material can be continuously conveyed at a constant speed without being plastically deformed, so that the surface treatment, the heat treatment and the heat treatment of the material such as the coiled pipe and the wire can be performed. It has a great effect on equipment cost, efficiency and quality in non-destructive inspection.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of a feeding device for a tubular material and a wire material wound in a coil shape.

FIG. 2 is a sectional view taken along the line YY ′ of FIG.

FIG. 3 is a view showing an example of an eddy current flaw detection test result by the method of the present invention and the conventional method.

[Explanation of symbols]

 1 Pipe Material 2 Frame 3 Guide Frame 4 Receiving Roll 5 Wrapper Guide 6 Sorting Roll 7 Material Stop Plate 8 Gear 9 Frame Drive Motor 10 Chain (For Frame Drive) 11 Eddy Current Testing Equipment 12 Pinch Roll 13 Pinch Roll Drive Motor 14 Chain (For driving pinch rolls) 15 Marking device R Frame rotation direction X Pipe material movement direction A Undefected material placement stand B Inspected material placement stand

Claims (1)

[Claims] 1. A feeding device for a material wound into a coil, comprising a cylindrical stand (2) for holding the material, a receiving roller (4) for holding the stand (2), and a receiving roller (4). A guide frame (3) to hold and a pedestal (2)
A gantry drive motor (9) for rotating the trolley, a sorting roll (6) for preventing the coiled material from being caught in the wrapper guide (5), and a wrapper guide (for stably inserting the tip of the material into the pinch roll (12) ( 5), a plurality of pinch rolls (12) for conveying the material, and a pinch roll (1
A feeding device for coiled material, comprising a pinch roll driving motor (13) for rotating 2).