JPH0585023B2 - - Google Patents

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, ultrasonic flaw detection equipment during cold wire drawing has conventionally been installed between the die box of the wire drawing machine and the wire feeder, and is used to detect the running wire material. In order to prevent misalignment within the ultrasonic flaw detector due to vibration or the like, guides are provided on each of the input and exit sides of the ultrasonic flaw detector. This ultrasonic flaw detection device has an ultrasonic flaw detection tank equipped with a vertical flaw detection probe and an in-section oblique probe, and is mainly used to detect flaws inside wire materials and subcutaneous inclusions. There is.

(Problem to be solved by the invention) The ultrasonic flaw detection device used in cold wire drawing equipment as described above requires installation space between the die box of the wire drawing machine and the wire feeder, and the drawing equipment is compact. Moreover, since the installation location is behind the die box of the wire drawing machine in the wire drawing direction (the front and rear directions in the following explanation are based on the wire drawing direction), the Since flaw detection is not performed on wire materials, it is necessary to provide a separate process for performing only ultrasonic flaw detection, especially for wire materials that have undergone the final cold wire drawing process.

In addition, when an ultrasonic flaw detection device with the conventional configuration described above was installed immediately in front of the die box of a wire drawing machine, it was found that the lubricant installed immediately behind the die box peeled off from the wire material after exiting the wire drawing die. However, these peeled 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, the ultrasonic flaw detection tank is only equipped with a vertical flaw detection probe and an in-section oblique probe. Although it is possible to detect internal defects such as inclusions and subcutaneous inclusions, it is possible to detect internal defects such as inclusions under the skin. Bronck 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 die box in the wire drawing direction, and a wire material passage hole is left 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. A tentacle 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 an outlet 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 passage hole into the deposit removal tank, and then By discharging an amount of medium commensurate with the supply amount from the discharge port of the deposit removal tank, the lubricant, etc. that peels off from the wire material immediately after exiting the wire drawing die is discharged from the deposit removal tank. With,
This 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 installing both a vertical flaw detection probe and an axial angle angle flaw detection probe in the ultrasonic flaw detection tank, it is possible to detect internal defects such as inclusions inside the wire material and under the skin. Can detect cracks and wires at the same time while drawing.

(Example) Hereinafter, an example according to the present invention will be described based on the drawings.

Figure 1 is a cross-sectional side view of the ultrasonic flaw detection device;
The figure is the X arrow view in Figure 1, and the figure 3 is the Y view in Figure 1.
-Y cross-sectional view, FIG. 4 is a Z-Z cross-sectional view of FIG.

In the figure, the ultrasonic flaw detection device 1 includes, from the rear in the wire drawing direction, a lubricant box 2, a wire drawing die box 3, a deposit removal tank 4, an ultrasonic flaw detection tank 5, and a drainage tank 6.
and a guide die box 7 are fixed in this order between each other 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 die stand 8 with pins 10.
It is provided to be swingable in the vertical direction.

The lubricant box 2 is a box with a bottom made of a thin copper plate, and has passage holes 13 and 14 for wire drawing A' below the front and rear walls 11 and 12. A guide tube 15 is provided in the passage hole 13 of the rear wall 11, and a guide tube 15 is provided in the passage hole 13 of the rear wall 11.
is detachably fixed to the rear surface of the wire drawing die box 3 by a bolt 16.

The wire drawing die box 3 is composed of a substantially cylindrical body, and a hollow part 17 is provided with an inner flange 18 at the front to form a storage part 20 for the wire drawing die 19, and a front surface 21 is free from deposits. The rear surface 22 of the removal tank 4 is fixed by welding.

The deposit removal tank 4 includes a cylindrical body 24 having upper and lower drain ports 23, 23, a wire drawing die box 3 welded and fixed to the rear surface 22 of the cylindrical body 24, and a cylindrical body 24.
Wire drawing material A is welded and fixed to the front surface 25 of 4.
It is composed of a disk 27 having a through hole 26.

The ultrasonic flaw detection tank 5 has flanges 28, 2 at the front and rear ends.
9, and a vertical flaw detection holder 31 and an oblique flaw detection holder 31 having probes 30 and 30A at their tips are disposed at the upper part between the flanges 28 and 29.
In addition to having holes 32 and 32A in front and back each having a length that can be inserted through the holes 32 and 32A that can be adjusted and moved in the circumferential direction, there is also a water supply port 3 at the bottom for water that serves as a medium for ultrasonic flaw detection.
3 and a cylindrical body 34 having a hole 32 in the cylindrical body 34, and a water leakage prevention plate on the inner circumferential surface on which a vertical flaw detection holder 31 can be slidably attached at a position corresponding to the hole 32. Hole 3 with O-ring 35 for
6, and a vertical flaw detection holder 3 at the hole 36.
1 is sandwiched and supported by bolts 37 and 38, and also has a vertical flaw detection cylindrical body 41 having a fixing bolt 40 for fixing it to the cylindrical body 34, and a hole in the cylindrical body 34. A cylindrical body 41A for oblique flaw detection having the same structure as the cylindrical body 41 for vertical flaw detection is mounted around the outer periphery of the cylinder 32A, and a flange 2 at the rear end of the cylindrical body 34.
8 and a drainage tank 6 whose flange portion is 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 includes a cylindrical body 45 having drain ports 44 and 44 on the upper and lower sides, a disk 48 having a passage hole 47 for the drawn wire material A in the center, which is welded and fixed to the rear surface 46 of the cylindrical body 45, and the cylindrical body 45. A guide die box 7 is welded and fixed to the front surface 49 of the guide.

The guide die box 7 has a semi-cylindrical body 5 at the front.
A lower semi-cylindrical member 54 having a cylindrical plate body 51 at the rear and a cylindrical plate body 51 and having a collar 53 at the front end of the inner circumferential surface of the semi-cylindrical body 50 to accommodate the guide die 52 between it and the cylindrical plate body 51; A lower semi-cylindrical member 5 is attached to the rear end of the surface.
4, 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 circumferential surface. , these upper semi-cylindrical members 57
and the lower semi-cylindrical member 54 are provided with flanges 59 and 60 projecting in the radial direction on the outer circumferential surfaces of the mating surfaces 58, respectively,
Bolt 61 allows these guards 59 and 60 to be split into two.
It consists of a fixed configuration. The front surface 49 of the cylindrical body 45 of the drainage tank 6 is welded to the rear surface of the cylindrical plate body 51 of the lower semi-cylindrical member 54.

Reference numeral 62 denotes a jig fixed in front of the die stand 8 and configured to be able to move up and down, and is used to guide the guide die box 7 of the ultrasonic flaw detection device 1.
Place.

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 a die stand 8 of the wire drawing machine 64 is equipped with an ultrasonic flaw detection device 1 having the above configuration. is provided.

Before wire drawing, lubricant L 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 flaw detection In the tank 5, a vertical flaw detection holder 31 and an oblique flaw detection holder 31A having probes 30 and 30A at their tips are provided with holes 32 and 3.
6, 32A, and 36A, respectively, while sliding and adjusting the position, and a guide die 52 with a processing rate of approximately zero is attached to the guide die box 7 and prepared.

Thereafter, the coiled wire material A' is placed on the wire feeder 63, and the tip of the wire material A', which has been previously processed to have a smaller diameter than the inner diameter of the guide die 52, is placed on the guide of the lubricant box 2. Pass it through the pipe 15 to the guide die 52 of the guide die box 7 and make it protrude in front of the guide die 52, and chuck the protruding tip to the winding drum 65 of the wire drawing machine 64. In this state, open the water supply port of the ultrasonic flaw detection tank 5. At the same time as opening the tap 33 and supplying water, the drain ports 23 and 23 of the deposit removal tank 4 are opened so that the deposit removal tank 4, ultrasonic flaw detection tank 5, and drain tank 6 are always filled with water. At the same time, the drain ports 44, 44 of the drain tank 6
After opening the plug to the extent that water flows from the ultrasonic flaw detection tank 5 to the drainage tank 6 side, the winding drum 65 of the wire drawing machine 64 is opened.
is rotated to draw the wire drawing material A.

Therefore, during wire drawing, since water constantly flows from the ultrasonic flaw detection tank 5 to the deposit removal tank 4 through the passage hole 26 of the disk 27 and the wire drawing material A, the wire drawing die 19 must be The lubricant, etc. that peels off from the wire drawing material A immediately after exiting remains in the deposit removal tank 4 and is also discharged from the discharge port 2.
3 and 23, and does not flow into the ultrasonic flaw detection tank 5.The water in the ultrasonic flaw detection tank 5 is Since temperature rise is prevented, 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 space between the passage hole 47 of the disk 48 and the drawn wire material A, 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, a rise in the temperature of the water in the ultrasonic flaw detection tank 5 is reliably prevented.
Ultrasonic flaw detection with less flaw detection noise and a good S/N ratio can be performed within the range.

Also, among the vertical flaw detection probe 30 and the oblique flaw detection probe 30A provided in the ultrasonic flaw detection tank 5, the oblique flaw detection probe 30A is changed to an axial angle flaw detection probe. As a result, internal defects and chevron cracks in the drawn wire material A 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 die box of the wire drawing machine and the wire feeder, allowing the space between the die box of the wire drawing machine and the wire feeder to be as narrow as possible, and allowing the wire drawing die to Since it also serves as a rear guide for the ultrasonic flaw detection device, the ultrasonic flaw detection device itself can be made more compact. In addition, the wire material can be inspected for flaws immediately after exiting the wire drawing die.
It has the advantage that ultrasonic flaw detection, which is a separate process after the final cold wire drawing process, can be omitted.

[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 along the X arrow in FIG. 1, FIG. 3 is a YY cross-sectional view in FIG. 1, and FIG. FIG. 5 is a sectional view taken along the Z-Z line in FIG. 1, and FIG. 1...Ultrasonic flaw detection device, 2...Lubricant box, 3
... Die box for wire drawing, 4... Deposit removal tank, 5...
Ultrasonic flaw detection tank, 6... Drain tank, 7... Guide die box, 8... Die stand, 9... Bracket, 1
0... Pin, 19... Wire drawing die, 23, 44... Drain port, 26, 47... Passing hole, 30, 30A... Probe, 31... Holder for vertical flaw detection, 31A... Holder for oblique flaw detection, 33... Water supply port, 35...O for preventing water leakage
Ring, 41... Cylindrical body for vertical flaw detection, 41A... Cylinder body for oblique flaw detection, 52... Guide die, 63... Wire feeder, 64... Wire drawing machine, A... Wire drawing material, A'... Wire drawing material,
L...Lubricant.

Claims (1)

[Scope of Claims] 1. An ultrasonic flaw detection device for cold wire drawing equipment in which a wire material is drawn through a wire drawing die, the die box housing the wire drawing die having a deposit removal tank and an ultrasonic flaw detection device in front of the die box in the wire drawing direction. The sonic flaw detection tanks are fixed and provided in this order, and the deposit removal tank and the ultrasonic flaw detection tank are partitioned by leaving a wire material passage hole,
In addition, 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 a discharge port for the ultrasonic flaw detection medium. Sonic flaw detection equipment. 2. The ultrasonic flaw detection device for 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.