JPH0735707Y2 - Wire / bar material surface partial flaw removal device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is for cutting and peeling defective parts such as scratches, cracks, and tears scattered on the surface of a wire / bar material sent in the longitudinal direction with a cutting blade. The present invention relates to a surface partial flaw removing device for removing from wire / bar material.

<Prior Art> [Prior Art 1] A conventional surface partial flaw removal device of this type is disclosed in Japanese Utility Model Laid-Open No. 63-41418.
No. As shown in FIGS. 6 to 8, this is to detect the flaw existing on the surface of the wire / bar 1 having a circular cross section sent in the longitudinal direction and to indicate the flaw position in the circumferential direction of the wire / bar 1. A flaw detection means for outputting a flaw signal, a flaw removal tool 3 for removing the flaw 2 by advancing toward the wire / bar 1 based on the flaw signal, and the flaw removal tool 3 for removing the wire / rod. A holding means 4 which holds the material 1 so as to be rotatable, and a rotation positioning means 5 which rotates and positions the holding means 4 so that the flaw removal tool 3 is located at the flaw position indicated by the flaw signal. It is equipped with and.

In FIG. 6, 7 is a roller located on the opposite side of the cutting tool 3 as the flaw removing tool with the wire / bar material 1 interposed therebetween.

In the above-mentioned configuration, the tool 3 which is a flaw removal tool is rotated by the flaw signal to the position where there is a flaw in the wire / rod 1 as shown in FIG. As shown in the figure, by advancing the cutting tool 3 toward the center of the wire / bar material 1, the surface of the wire / bar material 1 was partially cut and peeled to remove the flaw.

[Prior Art 2] FIG. 9 is a schematic view of the surface / part bar flaw removing device shown in Prior Art 2 and is disclosed in Japanese Patent Publication No. 1-20011.

The surface partial flaw removal device shown in this figure pushes a part of the ring-shaped cutting blade 31 against the flaw of the wire / bar 1 by tilting the ring-shaped cutting blade 10 with three or more cylinders 11 and 12. This is to remove the flaw.

<Problems to be Solved by the Invention> In the above-mentioned conventional technique 1, in order to make the depth of cut constant, the amount of advancement of the cutting tool 3 must be controlled, and the control becomes complicated.

Further, since the cutting tool 3 is used, the cutting tool always cuts with the same cutting edge, which causes a problem in durability of the cutting tool 3.

In this respect, the one shown in the prior art 2 uses the ring-shaped cutting blade, so that the entire circumference of the cutting blade 10 can be used uniformly and its durability is improved. Similarly, a tilting stopper mechanism for keeping the cutting amount of the ring-shaped cutting blade 10 constant is necessary, which may complicate the structure.

Furthermore, as shown in FIGS.
The shape of the incision 13 in the wire / bar 1 is linear, and the load applied to the cutting blade at the beginning of incision may be large.

In view of the above, the present invention can improve the durability of the cutting blade, and can simplify the structure for keeping the cutting depth constant, and can reduce the load applied to the cutting blade. For the purpose of providing.

<Means for Solving the Problems> The means for solving the problems according to the present invention is, as shown in FIGS. 1 and 2, defects such as flaws, cracks, and tears scattered on the surface of the wire / bar 1 that is fed in the longitudinal direction. A part of the inner surface of the ring-shaped cutting blade 31 is cut and peeled off to remove it from the wire / bar material 1.
a cylindrical cutting positioning body 33 rotatably supported by the flaw removal device main body 32 about the feed axis A of the wire / bar 1 so that a rotates with a gap a between the wire / bar 1. A cutting positioning body rotating means 34 for rotationally positioning the cutting blade 31 corresponding to a surface defect portion of the wire / bar material 1 passing through the center, and the cutting blade 31 is offset from the center of the wire / bar material 1. The cutting positioning body that holds the cutting blade 31 so that the cutting positioning body rotates
The cylindrical cutting blade holding cylinder 35 is eccentrically supported by 33 on the center of the wire / bar material 1 and is rotatably supported, and the inner cutting edge 31a of the ring-shaped cutting blade 31 of the cutting blade holding cylinder 35 is the wire / bar material 1 And a holding cylinder rotating means 37 for rotating the holding cylinder rotating means 37 to a position where it comes into contact with the surface defect portion.

<Operation> In the above problem solving means, the flaw 2 of the wire / bar material 1 is found by the flaw detector 25, and the cutting positioning body rotating means 34 is first actuated based on the flaw signal to start the cutting positioning body. Rotate 33 to the position corresponding to the outer peripheral defect portion of the wire / bar 1.

That is, as shown in FIG. 2, when there is a flaw 2 on the upper part of the wire / bar material 1, the rotation center line B of the holding cylinder 35 is located below the center line A of the wire / bar material 1 by an eccentric amount x. Rotate until you do.

Next, the holding cylinder 35 is rotated 180 ° by the holding cylinder rotating means 37. Then, as shown in FIG. 2, the hatched portion 31b of the ring-shaped cutting blade 31 rotates around the rotation center line B, and the wire / bar 1
18 from the one end of the shaded part of the
The entire diagonally shaded portion 1a of the wire / bar 1 is cut and peeled off in a state of being rotated by 0 °.

After removing the flaw 2 on the wire / bar 1, re-hold the holding tube 35
° Reverse rotation to return it to the original position, or
Rotate forward and return to the original position.

Then, as shown in FIG. 5, at the cutting start end 13b and end 13a of the wire / bar 1 of the ring-shaped cutting blade 31,
A whisker-shaped cut shape that is displaced in the circumferential direction of the wire / bar 1 is formed.

In this way, the ring-shaped cutting blade 31 is attached to the center line A of the wire / bar 1.
Since it is rotated about the rotation center B which is eccentric from the above, the cutting start end side 13b is displaced in the circumferential direction of the wire / bar material 1 and gradually cuts no matter how fast the holding cylinder 35 is rotated. Therefore, the load on the cutting edge of the cutting blade 31 can be reduced accordingly.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a main part of a wire / bar material surface partial flaw removal device according to the present invention, FIG. 2 is a view showing traces of the wire / bar material and a ring-shaped cutting blade, and FIG. 3 is a surface partial flaw. Overall configuration diagram of the taker, No. 4
The figure shows the flaws in the wire / bar, and FIG. 5 shows the state in which the flaws in the wire / bar have been removed.

First, referring to FIG. 3, the overall structure of the surface partial flaw removing device is shown. In FIG. 3, reference numerals 21 and 22 denote sizing dies for gripping both ends of the wire / bar 1, guide dies such as step dies, and 23. 2
4 is a first and second surface partial flaw removing device interposed between the guide dies 21 and 22, 25 is a flaw detector arranged in front of the first flaw removing device 23, and 26 is a line from which the flaw is removed. A winding drum for winding the bar 1 through the guide roller portion 27.

And, as shown in FIG. 1, the surface partial flaw removing device according to the present invention uses ring-shaped cutting to remove defective portions such as flaws, cracks and tears scattered on the surface of the wire / bar material 1 fed in the longitudinal direction. A part of the inner surface of the blade 31 is cut and peeled off from the wire / bar material 1 so that the inner surface edge 31a of the cutting blade 31 rotates with a gap a between it and the wire / bar material 1. The cylindrical cutting positioning body 33 rotatably supported by the flaw removal device main body 32 about the feed axis A of the wire / bar 1 and the wire / bar 1 passing through the center of the cutting blade 31. Cutting positioning body rotating means 34 for rotationally positioning corresponding to the surface defect portion, and holding the cutting blade 31 so as to rotate the cutting blade 31 eccentrically from the center of the wire / bar 1, to the cutting positioning body 33. A cylindrical cutting blade holding cylinder 35 eccentrically supported from the center of the wire / bar material 1 and rotatably supported, and the cutting blade holding cylinder 35. The cylinder 35 ring cutting blade 31
And a holding cylinder rotating means 37 for rotating the inner surface cutting edge 31a of the above to a position where it comes into contact with the surface defect portion of the wire / bar 1.

The ring-shaped cutting blade 31 is a peeling die in which an inner surface cutting edge 31a protruding toward the upstream side of the wire / rod 1 is formed on the inner surface thereof, and the inner diameter D2 thereof is as shown in FIG. Diameter of material 1
It is formed to have a larger diameter than D1 and has a size such that a gap a is formed between the wire and the bar 1.

The ring-shaped cutting blade 31 has a front end concave portion 38 of the cutting blade holding cylinder 35.
, And its front surface is fixed to the cutting blade holding cylinder 35 by an annular pressing piece 39 so as not to be pulled out.

The cutting positioning body 33 is rotatably supported by the cylindrical bracket 39 of the flaw removal device main body 32 via a bearing 40, and a retaining flange 41 is formed at the front portion thereof, and a retaining retaining member is provided at the rear portion thereof. The collar 42 is attached.

The cutting positioning body rotating means 34 for driving the cutting positioning body 33 includes a motor 44 arranged at the upper end of the bracket 39 of the flaw removal device main body 32, and a drive side pulley fixed to the tip of the rotation shaft 44a of the motor 44. 45, a driven pulley 46 fixed to the rear outer peripheral surface of the cutting positioning body 33, and both pulleys 45, 46
It is composed of a belt 47 wound between them.

The motor 44 of the cutting positioning body 33 is rotationally controlled based on a signal from the control unit so as to rotate at an arbitrary angle based on a flaw signal from the flaw detector 25.

The cutting blade holding cylinder 35 rotatably fitted in the cutting positioning body 33 via a bearing 48 has a cutting positioning body 33 at its front portion.
A flange 49 for preventing removal from the holder is formed, and a protrusion preventing piece 50 for preventing protrusion to the front of the holding cylinder is in contact with the front surface of the flange 49.

Further, the rotation center line B of the holding cylinder 35 is as shown in FIGS.
Only the dimension x is eccentric (the eccentricity x) from the feed axis A of the wire / bar 1.

Further, inside the holding cylinder 35, a conical center hole 52 is formed around the feed axis A of the wire / bar 1.

The holding cylinder rotating means 37 for driving the holding cylinder 35 is, as shown in FIG. 1, a holding cylinder motor 54 fixed to a supporting portion 53 protruding from the front of the cutting positioning body 33, and a rotation of the motor 54. The worm gear 55 is externally fitted and fixed to the shaft, and the worm wheel 56 is externally fitted and fixed to the outer peripheral surface of the front end of the holding cylinder 35 and meshes with the worm gear 55.

The holding cylinder motor 54 is rotationally controlled based on a signal from the control unit so as to rotate an arbitrary angle based on a flaw signal from the flaw detector 25.

In the above structure, the wire / bar material 1 is pulled by the winding drum 26 and wound around the winding drum 26 through the guide dies 21 and 22, as shown in FIG.

At this time, since the flaw detector 25 is interposed between the guide dies 21 and 22, the flaw 2 formed on the wire / bar 1 can be found as shown in FIG. Based on the flaw signal from this flaw detector 25,
First, the cutting positioning body rotating means 34 is operated to rotate the cutting positioning body 33 to a position corresponding to the outer peripheral defect portion of the wire / bar 1.

That is, as shown in FIG. 2, when there is a flaw 2 on the upper part of the wire / bar material 1, the rotation center line B of the holding cylinder 35 is located below the center line A of the wire / bar material 1 by an eccentric amount x. Rotate until you do.

Next, the holding cylinder 35 is rotated 180 ° by the holding cylinder rotating means 37. Then, as shown in FIG. 2, the hatched portion 31b of the ring-shaped cutting blade 31 rotates around the rotation center line B, and the wire / bar 1
18 from the one end of the shaded part of the
The entire diagonally shaded portion 1a of the wire / bar 1 is cut and peeled off in a state of being rotated by 0 °.

After removing the flaw 2 on the wire / bar 1, re-hold the holding tube 35
° Reverse rotation to return it to the original position, or
Rotate forward and return to the original position.

Then, as shown in FIG. 5, at the cutting start end 13b and end 13a of the wire / bar 1 of the ring-shaped cutting blade 31,
A whisker-shaped cut shape that is displaced in the circumferential direction of the wire / bar 1 is formed.

In this way, the ring-shaped cutting blade 31 is attached to the center line A of the wire / bar 1.
Since it is rotated about the rotation center B which is eccentric from the above, the cutting start end side 13b is displaced in the circumferential direction of the wire / bar material 1 and gradually cuts no matter how fast the holding cylinder 35 is rotated. Therefore, the load on the cutting edge of the cutting blade 31 can be reduced accordingly.

In addition, in FIG. 5, at the cutting end 13a, the shape of the solid line is the ring-shaped cutting blade after the flaw of the wire / bar 1 is removed.
The shape shown by the broken line in the figure when 31 is rotated in the forward direction is the one when the ring-shaped cutting blade 31 is rotated in the reverse direction after the flaw of the wire / bar 1 is removed.

By the way, in FIG. 2, the general expression for the cutting depth γ of the ring-shaped cutting blade 31 is as follows:
When the eccentricity between the ring-shaped cutting blade 31 and the center B of rotation of the ring-shaped cutting blade 31 is x, and the gap between the ring-shaped cutting blade 31 and the wire / bar 1 is a, the ring-shaped cutting blade 31 is rotated 180 ° and the cutting depth is γ is γ = x−a.

However, in practice, since the wire / bar 1 has a bend,
Assuming that the deflection amount is δ, it can be calculated by γ = x−a−δ.

Here, when the cutting depth γ = 0.3 mm, the amount of deflection δ = 0.2 mm, and the gap a = 1 mm, the eccentricity x becomes x = (1 + 0.3 + 0.2) mm = 1.5 mm.

If the number of ring-shaped cutting blades 31 is 1, 360 ° around the wire.
The eccentric position must be rotated 360 ° in order to remove the flaws found in any of the parts, so it is difficult to deal with the mechanism mechanically, and it becomes impossible to follow the material passing speed.

Therefore, in the present embodiment, the number of the surface flaw removing devices is usually two or more, and each of them has a circumference of 180 °.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, the cutting positioning body rotating means 34 and the holding cylinder rotating means 37 use motors in this embodiment, but the invention is not limited to this, and cylinders or the like may be used. Further, the power transmission mechanism is not limited to the worm gear and the worm wheel, but a combination of a rack and a pinion, or a gear mechanism other than the worm may be used.

<Effect of device> As is apparent from the above description, according to the present invention, since the ring-shaped cutting blade is rotated around the center of rotation of the wire / bar material, the cutting start end side is the wire / bar. The material is displaced in the circumferential direction of the material and gradually cuts no matter how fast the holding cylinder is rotated, and the load applied to the cutting edge of the cutting blade can be reduced accordingly.

Therefore, the durability of the cutting edge can be improved, and since the cutting edge is ring-shaped, the entire edge of the cutting edge can be used. There is.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a wire / bar material surface partial flaw removal device according to the present invention, FIG. 2 is a view showing traces of the wire / bar material and a ring-shaped cutting blade, and FIG. 3 is a surface partial flaw. Overall configuration diagram of the taker, No. 4
The figure shows a flaw of a wire / bar material, FIG. 5 shows a state in which a flaw of a wire / bar material is removed, and FIG. 6 is a cross-sectional view of a surface partial flaw removal device corresponding to Prior Art 1. FIG. 7 and FIG. 8 are views showing the same operating state, FIG. 9 is a schematic view of a surface partial flaw removing device corresponding to the prior art 2, and FIG. 10 is a conventional surface partial flaw removing device. FIG. 12 is a side view showing a flaw removal portion of the wire / bar material when it is made up, and FIG. 11 is a plan view thereof. 1: wire / bar material, 31: ring-shaped cutting blade, 31a: inner surface cutting edge, 32: flaw removal device body, 33: cutting positioning body, 35: holding cylinder, 37: rotating means.

Claims (1)

[Scope of utility model registration request] 1. A wire / bar that is sent in the longitudinal direction. A defective portion such as a flaw, a crack, or a peeling scattered on the surface of the wire is cut and peeled off by a part of the inner surface of the ring-shaped cutting blade to remove the wire. In the surface part flaw removal device of the wire / bar material to be removed from the bar material, insert the wire / bar feed axis into the flaw removal device body so that the inner surface cutting edge of the cutting blade rotates with a gap between the wire / bar material. A cylindrical cutting positioning body rotatably supported as a center, and a cutting positioning body rotating means for rotationally positioning the cutting blade corresponding to a surface defect portion of a wire / bar material passing through the center, A cylindrical cutting blade holding cylinder that holds the cutting blade so as to rotate eccentrically from the center of the wire / bar and rotatably supports the cutting positioning body eccentrically from the center of the wire / bar, The cutting blade holding cylinder has a ring-shaped cutting blade whose inner surface has a line
A surface / part flaw removing device for a wire / bar, comprising: a holding cylinder rotating means for rotating the rod to a position where it comes into contact with a defective surface portion of the bar.