JPH0120011B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a surface flaw removing device for wires and bars. (Prior Art) As this type of surface flaw removing device for wires and bars, the one described in Japanese Patent Application Laid-Open No. 114618/1983 is known. This conventional device will be explained based on FIG.
The main body frame 80 has an insertion hole 82 through which a wire or bar 81 can be inserted, and a guide ring 83 that slidably holds the wire or the like 81 is fitted into the insertion hole 82 . A disk-shaped tilting plate 84 is provided on the front side of the main body frame 80, and a ring-shaped cutting blade 85 that fits around the wire rod 81 and the like is provided in the center of the tilting plate 84, coaxially with the guide ring 83. It is being The main body frame 80 has holding bolts 87 which are slidably supported by compression coil springs 86 at three points concentrically with the insertion hole 82 and equally spaced apart in the circumferential direction at six equal intervals on the circumference. The tilting plate 84 is tiltably held by a spherical portion 88 at the tip of the holding bolt 87. Further, the main body frame 80 is provided with an extrusion means 89 at an intermediate position between the holding bolts 87 at six equal positions on the circumference. This extrusion means 89 consists of a hydraulic cylinder, and the tip end surface of the piston rod 90 of the cylinder is in contact with the rear end surface of the tilting plate 84. The operation of the above conventional device will be explained based on FIG. 9. First, if there is a flaw on the upper surface of the wire 81, the piston rod 90 of the upper one 89 of the three extrusion means 89, 89, 89 is extended, and the other two
The two extrusion means 89, 89 remain fixed. Thus, the tilting plate 84 is pushed out and tilted using the tip surfaces of the piston rods 90 of the two lower extrusion means 89, 89 as fulcrums, and the cutting blade 84 is tilted.
5 bites into the upper surface of the wire rod 81, and the wire rod 81 moves in the axial direction, so that the surface flaw is removed by the cutting blade 85.
It is removed by cutting. If there is a flaw on the lower surface of the wire 81, contrary to the above, the pistons 90, 90 of the two lower extrusion means 89, 89 are simultaneously extended, and the upper extrusion means 89 is fixed. Thus, the tilting plate 84 is tilted in the opposite direction to that shown in FIG. 9, and the flaws on the lower surface of the wire 81 are removed. By appropriately selecting one or two of the three extrusion means 89, 89, 89, extruding and fixing them as described above, and tilting the tilting plate 84, all the parts of the outer peripheral surface of the wire rod 81 can be Positional flaws can be removed. (Problems to be Solved by the Invention) In the prior art, if the extrusion amount of the extrusion means is the same, the tilting plate is extruded and tilted by one extrusion means, and the tilting plate is extruded and tilted by two extrusion means. Depending on the case, there will be a difference in the amount of penetration of the cutting blade. Therefore, at any position on the outer peripheral surface of the wire/bar,
In order to remove defects with the same amount of cutting, the amount of extrusion must be controlled by the combination of extrusion means used. However, it is extremely difficult to individually control the extrusion rate of each extrusion means. (Means for Solving the Problems) In order to solve the above problems, the present invention has provided the following means. That is, the feature of the wire/bar surface flaw removing device of the present invention is that the main body frame 1 is provided with an insertion hole, the wire/bar material 3 is inserted concentrically into the insertion hole 2, and the wire/bar material 3 is inserted concentrically into the insertion hole 2. A tilting plate 4 having a ring-shaped cutting blade 8 in the center that is concentric with the insertion hole 2 is provided on the front side of the main body frame 1 so as to be tiltable with respect to the axis of the insertion hole 2. Extrusion means 10 for tilting the tilting plate 4 by extruding the rear end surface in the axial direction
are provided at equal intervals in the circumferential direction on the concentric circumference of the insertion hole 2, and one or two of the extrusion means 10 are extruded, and the other extrusion means 10 are extruded. The tilting plate 4 is tilted using one or two specific fulcrums to cause the cutting blade 8 at the center to cut into a part of the outer circumferential surface of the wire/bar material 3, and the cutting blade 8 and In an apparatus for removing surface flaws from wires and bars by moving the wires and bars 3 relative to each other in the axial direction, a protrusion 9 is provided on the front end surface of the tilting plate 4 and concentrically with the cutting blade 8; An adjustment ring 12 is provided on the main body frame 1 so as to be movable and fixed in the axial direction, and which comes into contact with the protrusion 9 to restrict the tilting when the tilting plate 4 is tilted. A notch 9a is formed in the protrusion 9 at the abutting position of the protrusion 9 and the adjustment ring 12 so that when one of the tilting plates 4 is tilted, the cutting amount of the cutting blade 8 into the wire/bar material is constant.
It is in that it is provided. (Operation) When a specific one or two of the plurality of extrusion means 10 are extruded and the tilting plate 4 is tilted using a specific one or two of the remaining extrusion means 10 as a fulcrum. , a protrusion 9 protruding from the front surface of the tilting plate 4
comes into contact with the adjustment ring 12, and the tilting of the tilting plate 4 is regulated. The extrusion means 1 is provided at the abutting portion of the protrusion 9.
When the tilting plate 4 is tilted by either one or two of 0, since the notch 9a is provided so that the cutting amount of the cutting blade 8 into the wire/bar material is constant, the tilting of the tilting plate 4 is is determined by adjusting the contact position of the adjustment ring 12, regardless of the stroke of the extrusion means 10. That is, it is not necessary to individually control the strokes of the plurality of extrusion means, and it is only necessary to adjust the contact between the adjustment ring 12 and the protrusion 9. (Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, 1 is a main body frame, and an insertion hole 2 having a horizontal axis in the center of the frame 1.
is installed through it. A wire or rod 3 is inserted concentrically through the insertion hole 12. A disk-shaped tilting plate 4 is mounted on the front side of the main body frame 1.
is provided coaxially with the insertion hole 2. The tilting plate 4 is held so as to be tiltable with respect to the axis of the insertion hole 2 by a plurality of holding bolts provided on the front surface of the main body frame 1 on a circumference concentric with the insertion hole 2 at equal intervals in the circumferential direction. ing. This holding bolt is similar to the holding bolt 87 shown in FIG. 8, so it is not shown. A tapered hole 5 that widens toward the front side is provided in the center of the tilting plate 4.
A tapered sleeve 6 is removably tapered fitted into the sleeve. This tapered sleeve 6 is connected to the tilting plate 4
The tightening nut 7 screwed into the tapered hole 5
is prevented from leaving. A ring-shaped cutting blade 8 is provided on the inner surface of the front side of the tapered sleeve 6 and is coaxial with the insertion hole 2 . This cutting blade 8 has an inner cutting edge surface having a diameter that is approximately equal to or slightly larger than the diameter of the wire/bar material 3. A cutting blade 8 is provided on the front end surface of the outer peripheral portion of the tilting plate 4.
A ring-shaped protrusion 9 that protrudes forward is provided on a concentric circumference. The rear side of the tilting plate 4, that is, the main body frame 1
A plurality of extrusion means 10 are provided on the front surface of the extrusion means 10 on a circumference concentric with the insertion hole 2 at equal intervals in the circumferential direction. In the illustrated example, five or more are provided. This extrusion means 10 is composed of a hydraulic cylinder and has a piston rod 11 that moves forward and backward. The front end surface of the piston rod 11 is in contact with the rear end surface of the tilting plate 4. By extending one or two of the piston rods 11 forward, the tilting plate 4 is tilted relative to the axis of the wire/bar 3 inserted therethrough. When the tilting plate 4 is tilted, the protrusion 9 of the tilting plate 4
An adjustment ring 12 is provided that comes into contact with and restricts the tilting movement of the tilting plate 4. This adjustment ring 12
is a ring body coaxial with the insertion hole 2 of the main body frame 1. A cylindrical wall 13 protruding forward is provided on the front surface of the main body frame 1 concentrically with the insertion hole 2, and the adjustment ring 12 is screwed into the front end of the cylindrical wall 13 so as to be movable forward and backward. ing. In order to remove surface flaws from the wire/bar material 3 with the apparatus configured as described above, it is first necessary to command the position of the flaw. This position command is performed by equally dividing the circumference of the wire/bar 3 in the circumferential direction and specifying the dividing points. Therefore, the greater the number of divisions, the more accurate position commands can be given. The tilting plate 4 is tilted so that the cutting blade 8 bites into the maximum amount at the designated dividing position. That is, by providing the same number of extrusion means 10 as the number of divisions, extruding the extrusion means 10 corresponding to the division position and tilting the tilting plate 4, the wire/bar material 3 can be cut at a predetermined position. However, the number of divisions and the extrusion means do not necessarily have to correspond one-to-one. That is, the extrusion means 10 is
As shown in c and d, when 3, 4, 5, or 6 are provided, one or two of them are used for forward movement,
If the other one or two are used for fixed fulcrums, the number of divisions shown in the following table will be obtained.

[Table] As is clear from Table 1 above, if the combination of forward and fixed extrusion means 10 is carefully considered, the number of divisions can be twice as many as the number of extrusion means 10. Therefore, even if the number of divisions is large, the number of extrusion means 10 can be reduced, so that compactness can be achieved. The larger the number of divisions, the more economical it becomes possible to remove partial defects, but approximately 10 divisions is the maximum necessary for practical use, and any more than that would be excessive. The reason for this will be explained with reference to FIGS. 3 and 4. These figures show calculations of how the related specifications change when the number of divisions is varied. The following can be seen from these figures. The larger the number of divisions, the greater the cutting yield (area after removal)
The ratio of S ₂ to the material area S=S ₁ +S ₂ =π/4d ² (S ₂ /S) is high, and the loss is small. Furthermore, in the above case, the same purpose (removal of flaws of a certain depth) can be achieved with less cutting blade power when the number of divisions is larger. If the number of divisions is large, the effective depth of cut (cutting depth that can be guaranteed at the boundary between divisions) will remain the same even if the material diameter d or clearance [C = (chipper diameter - material diameter) x 1/2] changes. There is little variation in the maximum depth of cut tm with respect to te, and in practice, even if these changes, the operation can be operated with the same maximum depth of cut setting value (therefore, the same amount of advance of the extrusion means 10), and the on-site It is true. However, even if the number of divisions is around 10 or more, the merits are small (the characteristic curves in Figures 3 and 4 come down). From the above results, it is most practical to divide into 10 by using 5 extrusion means 10 or to divide into 12 by using 6 extrusion means 10. By the way, as mentioned above, when obtaining the number of divisions that is twice the number of extrusion means 10, the combination of group A and group B in FIG. There is a problem that the amount of descent t of the blade 8 is different. For example, as shown in FIG. 5, for the sake of simplicity, three extrusion means 10 are used and the diameter of the wire/bar material is 0 mmφ. Then, the amount of advance x of the extrusion means 10 and the amount of descent t of the cutting blade 8 are The relationship is expressed by the following equation. t ₁ = R (1-cosΔθ+l/RsinΔθ)……A t ₂ =0.5 (1-cosΔθ+l/0.5RsinΔθ)…BΔθ=tan ^-1 x/1.5R……C∴Δt=t ₁ − t ₂ =0.5R (1-cos Δθ) d. In other words, the amount of notch in group A always increases by Δt. Since the order of removing defects on the material is extremely small at 0.1 mm to 0.3 mm, this Δt may not be ignored. Therefore, in order to solve the problem of Δt, as shown in FIGS. 6 and 7, cutouts 9a are provided to provide a difference in the amount of protrusion of the projections 9 of the tilting plate 4. That is, as shown in FIG.
and the adjustment ring 12 by x (extrusion means 1
x ₂ in the case of main advance and x ₁ in the case of double advance, and the protrusion moves forward until the contact surface of the protrusion 9 comes into contact with the adjustment ring 12 to obtain a predetermined value t ₁ or t ₂ . Now, if we set t ₁ = t ₂ and find x ₁ and x ₂ , we always get
There is a relationship x ₁ > x ₂ (the difference x ₁ − x ₂ = Δx), and x ₁ and
x ₂ are not equal. Therefore, if the contact surface of the protrusion 9 on the x ₁ side is removed by the difference (Δx) and a notch 9a is provided, t ₁ =
The relationship t ₂ will be maintained, and the Δt problem can be solved. At this time, it is possible to remove a portion of the contact surface of the adjustment ring 12 to create a difference, but t (=t ₁
= t ₂ ), the adjustment ring 12 is turned, which does not necessarily mean that the removal position will be at x ₁ , which is not practical. In this way, it is convenient because the adjustment ring 12 can be used to adjust the amount of advance of the extrusion means 10 all at once without having to adjust the amount of advance of the extrusion means 10 individually. The required depth of cut t in Fig. 1 is expressed as: t=tm+C+δ tm; maximum depth of cut C; clearance between the cutting blade and the material δ; deflection of the _wire ; t ₂ , x ₁ , and x ₂ are expressed by the following formula. t ₁ = (R+D/2)-(R+D/2) ² +l ²・cos(θ ₁
+Δθ ₁ ) θ ₁ = tan ^-1 (l/R+D/2) x ₁ = (R+M)・sinΔθ ₁ t ₂ = (R・cos360°/n+D/2) −(Rcos360°/n+D/2) ² +l ²・cos(θ ₂ +Δθ
₂ ) θ ₂ = tan ^-1 (l/Rcos360゜/n+D/2) x ₂ = (Rcos360/n+M) sinΔθ ₂ , where n is the number of divisions.Next, using the above formula, the number of divisions n=10 of the extrusion means. Table 2 shows the results of calculating the value of Δx for each material diameter, assuming that number N = 5, material diameter d = 20 to 32 mmφ, effective depth of cut te = 0.3 mm, clearance C = 1 mm, R = 150 mm, and M = 223 mm.

[Table] As is clear from Table 2, Δx changes somewhat depending on the diameter of the material, but in this example, there is no practical problem even if a constant value of =0.49 mm is adopted. (Effects of the Invention) According to the present invention, a protrusion is provided on the front end surface of the tilting plate, and an adjustment ring that contacts the protrusion and regulates the inclination of the tilting plate is provided so as to be movable and fixed in the axial direction, and the extrusion means A notch is provided at the abutting part of the protrusion so that the amount of cut of the cutting blade remains constant even when the tilting plate is tilted by one or two of the two, so the amount of extrusion of the extrusion means is controlled. Even if not, the depth of cut can be adjusted by adjusting the contact distance between the tilting plate and the adjustment ring. Therefore, the cutting amount can be adjusted much more easily than the conventional method in which the cutting amount is adjusted by controlling the extrusion amount of the extrusion means.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flaw removing device showing an embodiment of the present invention, FIG. 2 is a diagram showing the number and arrangement of extrusion means, and FIG. 3 is a graph showing the relationship between the number of divisions and the maximum depth of cut.
Figure 4 is a graph showing the number of divisions and cutting yield, Figure 5 is a diagram for deriving the relational expression between the amount of advance of the extrusion means and the depth of cut of the cutting blade, Figure 6 is a front view of the tilting plate, 7th
The figures are a cross-sectional view taken along the line -- in FIG. 6, FIG. 8 is a cross-sectional view of a conventional example, and FIG. 9 is an explanatory view of the same operation. 1...Body frame, 3...Wire/bar material, 4...
Tilting plate, 8...cutting blade, 9...protrusion, 10...extrusion means, 12...adjustment ring.

Claims (1)

[Scope of Claims] 1. An insertion hole 2 is provided through the main body frame 1, a wire/rod 3 is inserted concentrically through the insertion hole 2, and the insertion hole 2 and the insertion hole 2 are provided on the front side of the main body frame 1. The tilting plate 4 has a concentric ring-shaped cutting blade 8 in the center,
A push-out means 10 is provided so as to be tiltable with respect to the axis of the insertion hole 2, and pushes out the rear end surface of the tilting plate 4 in the axial direction to tilt the tilting plate 4. 3 at equal intervals in the circumferential direction.
A specific one or two of the extrusion means 10 are provided, and the tilting plate 4 is tilted using a specific one or two of the remaining extrusion means 10 as a fulcrum. The cutting blade 8 at the center is cut into a part of the outer peripheral surface of the wire/bar 3, and the cutting blade 8 and the wire/bar 3 are moved relative to each other in the axial direction to cut the surface of the wire/bar. In the flaw removing device, a protrusion 9 is provided on the front end surface of the tilting plate 4 and concentrically with the cutting blade 8, and the protrusion 9 is provided on the main body frame 1 when the tilting plate 4 is tilted. An adjustment ring 12 that comes into contact with and regulates tilting is provided so as to be movable and fixed in the axial direction, and when the tilting plate 4 is tilted by either one or two of the extrusion means 10, the line of the cutting blade 8 - A notch 9 is provided in the protrusion 9 at the contact position of the protrusion 9 and the adjustment ring 12 so that the amount of cut into the bar material is constant.
A device for removing surface flaws from wires and bars, characterized in that it is provided with a. 2. The wire/bar surface flaw removing device according to claim 1, wherein five or more extrusion means 10 are provided.