JPH01239452A - Ultrasonic flaw detection device for cold wire drawing facility - Google Patents

Abstract

PURPOSE:To perform ultrasonic flaw detection in a small flaw detection noise state and to make the device compact by partitioning a sticking matter removal tank and an ultrasonic flaw detection tank except element wire through holes, and preventing sticking matter from entering the flaw detection tank and the temperature from rising. CONSTITUTION:The sticking matter removal tank 4, ultrasonic flaw detection tank 5, and a water discharge tank 6 are provided in the wire drawing direction of a die box, and partitioned except the element wire through holes 26 and 27. Then exhaust ports 23 and 44 are opened so that the tanks 4 and 6 are filled with water while water is feed from the feed port 33 of the tank 5. An element wire A exiting from a wire drawing die 19 has its sticking matter removed and is cooled with running water to prevent the temperature in the tank 5 from rising, thereby performing the flaw detection with a good S/N ratio in the small flaw detection noise state. Further, vertical and oblique probes 30 and 30A are provided to detect an internal defect and a chevron crack at the same time. Consequently, the flaw detection accuracy is improved and the device is made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an ultrasonic flaw detection device for cold wire drawing equipment that draws a wire material (rod, wire rod, etc.) through a wire drawing die.

(Prior Art) Generally, cold wire drawing of a wire material is performed by applying a lubricant to the wire material and then drawing it through a wire drawing die. Further, flaw detection of wire materials is performed using an ultrasonic flaw detection device, an eddy current flaw detection device, or the like during or after cold wire drawing.

In such cold wire drawing technology, an ultrasonic flaw detection device during cold wire drawing has conventionally been installed between the die box of the wire drawing machine and the wire feeding machine, and is used to detect the wire material while it is running. In order to prevent misalignment within the ultrasonic flaw detector due to vibrations, etc., guides are provided on each of the inlet and outlet sides of the ultrasonic flaw detector. In this ultrasonic flaw detection device, a vertical flaw detection probe and a vertical flaw detection probe are installed in the ultrasonic flaw detection tank. It is equipped with a circular cross-section bevel probe, and is mainly used to detect flaws inside wire materials and subcutaneous inclusions.

(Problems to be Solved by the Invention) Ultrasonic flaw detection equipment for cold wire drawing equipment such as the one mentioned above requires installation space between the Gui box of the wire drawing machine and the wire feeding machine, and the wire drawing equipment is In addition to not being able to be made compact, the installation location is at the rear of the wire drawing machine's Guibox in the wire drawing direction (the front and rear directions in the following explanation are based on the wire drawing direction), so the wire drawing die was removed. Since the subsequent wire material is not subjected to flaw detection, it is necessary to provide a separate process for performing only ultrasonic flaw detection, especially for the wire material that has undergone the final cold wire drawing process.

In addition, when the ultrasonic flaw detection device with the conventional configuration described above was installed immediately in front of the Gui box of a wire drawing machine and tested, it was found that the lubricant installed immediately behind the Gui box was absorbed into the wire material after it exited the wire drawing die. The peeled off pieces floated in the medium (water or oil) in the ultrasonic flaw detection tank, and were detected as flaw detection noise, making accurate ultrasonic flaw detection impossible.

In addition, in the conventional ultrasonic flaw detection device described above, since the ultrasonic flaw detection tank is only equipped with a vertical flaw detection probe and a cross-sectional angle probe, Internal defects such as inclusions and subcutaneous inclusions can be detected; Cracks cannot be detected.

In view of the above-mentioned problems, the present invention makes it possible to make cold wire drawing equipment compact and to perform ultrasonic flaw detection with less flaw detection noise, that is, with a good S/N ratio, at the same time as cold wire drawing processing. The purpose is to provide an ultrasonic flaw detection device for cold wire drawing equipment.

(Means for Solving the Problems) In order to achieve the above object, the ultrasonic flaw detection device for cold wire drawing equipment of the present invention provides a wire drawing die for cold wire drawing equipment that draws a wire material through the wire drawing die. A deposit removal tank and an ultrasonic flaw detection tank are fixed in this order in front of the Guibox in the wire drawing direction, and a wire material passage hole is provided between the deposit removal tank and the ultrasonic flaw detection tank. The ultrasonic flaw detection tank is provided with a supply port for the ultrasonic flaw detection medium, and the deposit removal tank is provided with an outlet for the ultrasonic flaw detection medium.

In addition, in order to detect internal defects such as inclusions inside the wire material and under the skin, and chevron cracks during wire drawing, a vertical flaw detection probe and an axial angle angle flaw detection probe are installed in the ultrasonic flaw detection tank. and can be provided.

(Function) Since the wire drawing die also serves as a rear guide for the ultrasonic flaw detection device, the ultrasonic flaw detection device itself can be made compact. Furthermore, since the wire material can be inspected for flaws immediately after exiting the wire drawing die, ultrasonic flaw detection in a separate step after the final cold wire drawing process can be omitted.

In addition, the deposit removal tank and the ultrasonic flaw detection tank are partitioned by leaving a wire material passage hole, and the ultrasonic flaw detection tank has a supply port for the ultrasonic flaw detection medium. The tank is equipped with a discharge port for the ultrasonic flaw detection medium, so while the medium is supplied into the ultrasonic flaw detection tank from the supply port, it flows out from the wire material passage hole into the deposit removal tank. By discharging an amount of medium commensurate with the supply amount from the discharge port of the deposit removal tank, the lubricant, etc. that is peeled off from the wire material immediately after exiting the wire drawing die is discharged from the deposit removal tank. It prevents ultrasonic flaws from flowing into the ultrasonic testing tank, allowing ultrasonic flaw detection with low flaw detection noise and a good S/N ratio.

In addition, by providing both a vertical flaw detection probe and an axial angle angle flaw detection probe in the ultrasonic flaw detection tank, internal defects such as inclusions inside the wire material and under the skin and chevron cranks can be detected. Can detect flaws at the same time during wire drawing.

(Example〕 Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a cross-sectional side view of the ultrasonic flaw detection device, Fig. 2 is a view taken along the X arrow in Fig. 1, Fig. 3 is a YY cross-sectional view of Fig. It is a ZZ sectional view of the figure.

In the figure, the ultrasonic flaw detection tank W1 includes a lubricant box 2, a wire drawing goo box 3, a deposit removal tank 4, an ultrasonic flaw detection tank 5, a drainage tank 6, and a guide goo box 7 from the rear in the wire drawing direction. The wire drawing die box 3 is fixed in turn by means such as bolts or welding, and both sides of the wire drawing die box 3 are attached to the bracket 9 of the wire stand 8 by means of bins 10 so as to be swingable in the vertical direction.

The lubricant box 2 is a box with a bottom made of thin steel plate, and is provided with passage holes 13 and 1 for the wire-drawn material A'' under the front and rear walls 11 and 12.
It has 4. A guide tube 15 is provided in the passage hole 13 of the rear wall 11, and the front wall 12 is removably fixed to the rear surface of the wire drawing die box 3 by a hole 6.

The wire drawing die box 3 is composed of a substantially cylindrical tube body, and a hollow portion 17 is provided with an inner flange 18 at the front to accommodate the wire drawing die 1.
9 storage portions 20 are formed, and the rear surface 22 of the deposit removal tank 4 is welded and fixed to the front surface 21.

The deposit removal tank 4 includes a cylindrical body 24 having drainage ports 23 and 23 at the top and bottom, a wire drawing die box 3 welded and fixed to the rear surface 22 of the cylindrical body 24, and a wire drawing die box 3 welded and fixed to the front surface 25 of the cylindrical body 24. A disk 2 having a passage hole 26 to the wire drawing material in the center thereof.
It consists of 7.

The ultrasonic flaw detection tank 5 has flanges 28 and 29 at the front and rear ends, and a vertical flaw detection holder 3 having probes 30 and 3OA at the tip is disposed above between these flanges 28 and 29.
In addition to having holes 32 and 32A of a length that can be inserted and adjusted in the circumferential direction through which the holder 31A and the holder 31A for oblique flaw detection can be inserted, the hole 32A has a length that can be adjusted and moved in the circumferential direction. A cylindrical body 34 having a cylindrical body 33 having a hole 33, and a water leakage prevention plate attached to the outer circumference of the hole 32 of the cylindrical body 34, and an inner circumferential surface on which a vertical flaw detection holder 31 can be slidably mounted at a position corresponding to the hole 32. has a hole 36 with an O ring 35 for use, and has a hole 36
A cylindrical body 41 for vertical flaw detection has a supporting body 39 that supports the vertical flaw detection holder 31 by sandwiching it between bolts 37 and 38, and also has a fixing bolt 40 for fixing it to the cylindrical body 34. Then, a cylindrical body 41A for oblique flaw detection, which has the same structure as the cylinder body 41 for vertical flaw detection, which is fitted around the outer periphery of the hole 32A of the cylindrical body 34, and a flange portion are bolted to the rear surface of the flange 28 at the rear end of the cylindrical body 34. a deposit removal tank 4 fixed at 42;
The drain tank 6 has a flange portion fixed to the front surface of a flange 29 at the front end of a cylindrical body 34 with bolts 43.

The drain tank 6 is a cylindrical body 4 having drain ports 44 and 44 at the top and bottom.
5, a disk 4 having a passage hole 47 for the wire drawing material in the center which is welded and fixed to the rear surface 46 of the cylindrical body 45, and the cylindrical body 45.
The guide die box 7 is welded and fixed to the front surface 49 of the guide die box 7.

The guiding guide box 7 has a semi-cylindrical body 50 at the front and a cylindrical plate body 51 at the rear, and stores a guide die 52 between the front end of the inner peripheral surface of the semi-cylindrical body 50 and the cylindrical plate body 51. A lower semi-cylindrical member 54 having a collar 53, and a step 55 that engages with the cylindrical plate body 51 of the lower semi-cylindrical member 54 at the rear end of the inner peripheral surface.
and an upper semi-cylindrical member 57 having a flange 56 that engages with the flange 53 of the lower semi-cylindrical member 54 at the front end of the inner peripheral surface. A radially protruding i59.60 is provided on each outer peripheral surface of the mating surface 58 with the collar 59.60.
It has a structure in which it can be divided into two and fixed with bolts 61.

And, on the rear surface of the cylindrical plate body 51 of the lower semi-cylindrical member 54,
A front surface 49 of the cylindrical body 45 of the drain tank 6 is fixed by welding.

Reference numeral 62 denotes a jig which is fixed in front of the guide stand 8 and is movable up and down, on which the guide box 7 of the ultrasonic flaw detection apparatus 1 is placed.

The usage state of the ultrasonic flaw detection apparatus 1 configured as above will be explained with reference to FIG.

The illustrated wire drawing equipment has a wire feeding machine 63 and a wire drawing machine 64 fixed to the floor F, and the die stand 8 of the wire drawing VIA 64 is equipped with an ultrasonic flaw detection device L having the above configuration. It is provided.

Before wire drawing, a lubricant is put into the lubricant box 2 of the ultrasonic flaw detection device 1, a wire drawing die 19 corresponding to the desired processing rate is installed in the wire drawing die box 3, and the ultrasonic In the flaw detection tank 5, a vertical flaw detection holder 31 and an oblique flaw detection holder 31A having a probe 30.3OA at the tip thereof are installed in holes 32, 36, 32A, and 36A, respectively, while sliding and adjusting their positions. A guide die 52 with a processing rate of approximately zero is attached to the guide box 7 and prepared.

Thereafter, the wire to be drawn A'' which has been wound into a coil is placed on the wire feeder 63, and the tip of the wire to be drawn A'', which has been previously processed to have a smaller diameter than the inner diameter of the guide die 52, is inserted into the guide tube of the lubricant ponx 2. 15 to guide die 5 of guide die box 7
2 to protrude to the front of the guide die 52, and the protruding tip is chucked to the winding drum 65 of the wire drawing machine 64. In this state, the water supply port 33 of the ultrasonic flaw detection tank 5 is opened and water is supplied at the same time. , while opening the drain ports 23 and 23 of the deposit removal tank 4 to drain the water so that the deposit removal tank 4, the ultrasonic flaw detection tank 5, and the drainage tank 6 are always filled with water.
The drain ports 44 and 44 of the drain tank 6 are opened to the extent that water can flow from the ultrasonic flaw detection tank 5 to the drain tank 6 side, and then the wire drawing machine 6 is opened.
The winding cylinder 65 of No. 4 is rotated to draw the wire onto the wire drawing material.

Therefore, during wire drawing, from the ultrasonic flaw detection tank 5 to the deposit removal tank 4,
Because water constantly flows between the passage hole 26 of the disc 27 and the wire drawing material A, the lubricant, etc. that peels off from the wire drawing material ^ immediately after exiting the wire drawing die 19 is removed from the deposit removal tank 4. The ultrasonic flaw detection is performed because the water that has cooled the drawn wire material A, which has been heated due to wire drawing, is immediately discharged. Since the temperature of the water in the tank 5 is prevented from rising, ultrasonic flaw detection with less flaw detection noise and a good S/N ratio can be performed in the ultrasonic flaw detection tank 5.

Furthermore, by flowing water from the ultrasonic flaw detection tank 5 to the drainage tank 6 through the gap between the passage hole 47 of the disk 48 and the drawn wire material, the temperature of the drawn wire material A, which had risen in temperature due to wire drawing, was cooled. Since the water is immediately discharged from the drainage tank 6, the temperature of the water in the ultrasonic flaw detection tank 5 is reliably prevented from rising.
Ultrasonic flaw detection with good N ratio is possible.

In addition, a vertical flaw detection probe 3 installed in the ultrasonic flaw detection tank 5
0 and angle angle flaw detection probe 30A, angle angle flaw detection probe 3
By using 0A as an axial oblique flaw detection probe, internal defects and chevron cracks in the wire drawing material can be detected simultaneously during wire drawing.

In addition, in this example, an example was shown in which two flaw detection holders were installed in the ultrasonic flaw detection tank, but three or more flaw detection holders could be installed, such as a vertical flaw detection probe or an oblique angle in the cross section. It goes without saying that the flaw detection performance can be improved by using an appropriate combination of flaw detection probes, axial angle angle flaw detection probes, and the like.

(Effects of the Invention) According to the ultrasonic flaw detection device for cold wire drawing equipment according to the present invention, the deposit removal tank and the ultrasonic flaw detection tank are fixed in this order in front of the die box that houses the wire drawing dies in the wire drawing direction. This eliminates the need for a flaw detection device between the wire drawing machine's Gui box and the wire feeder. Since the wire die also serves as a rear guide for the ultrasonic flaw detection device, the ultrasonic flaw detection device itself can be made more compact. Furthermore, since the wire material can be inspected for flaws immediately after exiting the wire drawing die, there are advantages such as the ability to omit ultrasonic flaw detection in a separate step after the final cold wire drawing process.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of an ultrasonic flaw detection device according to the present invention, FIG. 2 is a view taken in the direction of the X arrow in FIG.
-Y sectional view, FIG. 4 is a ZZ sectional view of FIG. 1, and FIG. 5 is an explanatory diagram of the usage state of the ultrasonic flaw detection apparatus according to the present invention. l Ultrasonic flaw detection device 2 Lubricant box 3 Wire drawing die box 4 Deposit removal tank 5 Ultrasonic flaw detection tank 6 Drain tank 7 Guide die box 8 Die stand 9 Bracket 10 Bin
19 Wire drawing die 2344 Drain port
26.47 Through hole 30, 30A probe
31 Holder for vertical flaw detection 31A Holder for angle flaw detection 33 Water supply port 35 O-ring for water leakage prevention 41 Cylindrical body for vertical flaw detection 41A Cylindrical body for angle flaw detection 5
2 Guide die 63 Wire feeding machine 64 Wire drawing machine A Wire drawing material A" Wire drawing material L
Lubricant patent applicant Kobe Steel Corporation Representative Patent attorney Akira Kanemaru −

Claims (2)

[Claims] (1) An ultrasonic flaw detection device for cold wire drawing equipment that draws a wire material through a wire drawing die, wherein a deposit removal tank and an ultrasonic flaw detection tank are located in front of a die box in the wire drawing direction that stores the wire drawing die. are fixed in this order, the deposit removal tank and the ultrasonic flaw detection tank are separated by leaving a wire passage hole, and the ultrasonic flaw detection tank is supplied with an ultrasonic flaw detection medium. 1. An ultrasonic flaw detection device for cold wire drawing equipment, characterized in that the deposit removal tank is provided with a discharge port for an ultrasonic flaw detection medium. (2) Ultrasonic waves in the cold wire drawing equipment according to claim 1, wherein the ultrasonic flaw detection tank is equipped with a probe for vertical flaw detection and a probe for axial angle angle flaw detection. Flaw detection equipment.