JPS5931595B2 - Vibration method of wire coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for processing a wire rod wound into a coiled shape by immersing it in a pickling solution while hanging it on a hook, by vibrating the hook to rotate the wire rod coil and uniformly processing the wire rod. In particular, the present invention relates to a vibration method that can perform various treatments, and in particular improves the vibration direction of the hanging hook to induce rotation of the wire coil.

Scale is generated on the surface of wire rods manufactured by hot rolling and wire rods heat-treated during secondary processing steps, and these must be removed by appropriate means.

For example, there are two methods for descaling: mechanical methods and chemical methods.The latter method involves a strand method in which the wire is run in the axial direction, and a strand method in which the wire is placed in a coiled state in a pickling solution. There is a batch method that involves soaking. Each of these methods should be used depending on the use of the wire, the location conditions of the factory, the availability of the wire, etc., but the batch pickling method is widely used in Japan. In this method, a wire coil is hung on a hanging hook and immersed together with the hanging hook in a pickling bath for a while, thereby chemically dissolving the iron oxide on the surface of the wire.

Generally, a vibrator or the like is provided on a hanging hook support member to vibrate the wire coil in the bath, so that the pickling liquid can sufficiently penetrate into the gaps between the wire rods. For example, FIG. 1 is an explanatory diagram showing a typical example, in which a wire coil 1 is attached to a hook-shaped hook 3 (
The beam material 2 is suspended from a hairpin hook (called a hairpin hook), is conveyed by a running lane and a hoist, and is raised and lowered at a predetermined location. Further, a vibrating device 4 is fixed to the top surface of the beam 2, and the vibrating device is of an eccentric crank type directly connected to an electric motor, an eccentric weight type, or the like. The figure shows a state in which the wire rod coil 1 is immersed in a bathtub 5, and a pickling liquid 6 is contained in the bathtub 5. In addition, when installing the beam 2, a shock absorber 8 is attached to the beam stands 7, 7 installed on both sides of the bathtub 5.
, 8. The immersed wire coil 1 vibrates when the vibrating device 4 is activated, but the vibration is caused in the suspension direction (arrow A) as shown in FIG.
direction), and the wire rod coil 1 was vibrated up and down to open or narrow the gap between the wire rods and the soil for uniform treatment. Therefore, the hanging support side (upper side) and the hanging lower side of the suspended wire coil 1 are always in the same position during processing, but the wire rod is in close contact with the upper side due to its own weight. , the lower part may be relatively rough and uniform processing may not be possible. For this reason, the present applicant has previously invented a means for rotating the suspended and immersed wire coil 1 by vibration, and has filed a patent application. This means utilizes vertical vibration as exemplified in Figure 2 above, and makes the axis of vibration unevenly distributed or intersects with the vertical line passing through the suspension support point, or makes other contact points. The suspension support point of the wire coil was displaced by the member. Although this invention has made it possible to perform uniform acid treatment, it is currently under consideration that by changing the vibration generating means, it is possible to rotate the wire coil 1 without requiring the above-mentioned means. I noticed that. That is, the conventional vibration vibrates the beam 2 in the vertical direction as described above, and is a vibration in the Y-axis direction as shown in the schematic diagram of FIG. 4, and this vibration causes the suspension support of the wire coil 1 The points were temporarily separated and displaced, and the amount of displacement was extremely small. However, the inventors discovered that if these vibrations were not linear vibrations in a fixed direction but circular vibrations, the wire coil could be rotated without the use of any special equipment, and this led to the present invention. However, in this invention, the vibration excitation device provided on the beam is a rotary vibrator, and its rotation axis is attached along the length direction of the beam, and the excitation device is installed in a plane perpendicular to the length direction of the beam. It is designed to vibrate in a circle.

The present invention will be described in detail below based on the drawings, but the drawings are not limited to what is illustrated in FIG. You can also do it. Furthermore, the embodiment described in the claims is not intended to limit the present invention only to this embodiment. FIG. The rotary vibrator 9 has an axis along the length direction of the beam 2, and various types of rotary vibrators such as those described above can be used as the rotary vibrator 9.

Further, although the shock absorber 8 is shown in which the lower side is supported by a coil spring, any spring that can clamp the beam 2 may be provided as necessary. As shown in the schematic diagram of Fig. 4, the vibration method of the present invention configured in this way has a vertical line connecting the oscillation rotation axis and the suspension support point as the Y axis, vibrates in the X and Y axis directions, and rotates the rotary vibrator. The axis is oriented in the Z-axis direction. The center of gravity G of the support system composed of the beam 2, the hanging hook 8, and the wire coil 1 is located at a distance below the rotary vibrator 9 by a distance indicated by σ. That is, when a force is generated in the vertical (Y-axis) direction by the vibrator 9, if the suspension hook has sufficient rigidity, that force is directly transmitted to the wire coil 1, and the coil 1 moves in the vertical direction, and then in the left and right directions. When a force in the (X-axis) direction is generated, since the center of gravity G is displaced by σ, this force becomes a rotational moment around the Z-axis at point G, causing the suspension support point A of the wire coil to move in the left-right direction. Do the following. The actual movement is caused by the vibrator 9 to continuously move from the Y-axis direction to the X-axis direction or from the X-axis direction to the Y-axis direction.
Since the supporting point A also moves correspondingly as shown in FIG. 5, the suspended wire coil 1 performs a similar rotational movement. Note that this movement is performed by setting the rotation axis of the vibrator 9 perpendicular to the plane of the paper (parallel to the Z axis) as shown in FIG.
If the vibrator is installed at a distance σ in the Y-axis direction from the center of gravity G (center of rotation), and the angular frequency of the vibrator is ωf1 and the load amplitude is f, the excitation forces Fy and Fx in the Y and X directions are expressed as It will be done.

Now, the equation of motion in the Y direction is determined by considering the balance of forces.

Here, Mv is the equivalent mass of the wire coil in the Y direction, m is the mass of the system other than the wire coil, and K is the spring constant of the support portion.
Substituting equation (1-1) into equation (2) to find Y yields.

Next, consider movement in the X direction. The equation of motion of point G in the X direction is determined by considering the balance of forces in the X direction.

Here, XG means the displacement at point G, and MH is the equivalent mass of the wire coil in the X direction. Substituting equation (1-2) into equation (4) to find XG~! --9-I55'! It becomes J.

The movement in the X direction of point A, which is the contact point between the hook and the wire coil, includes, in addition to the movement shown by equation (5), the movement due to the moment caused by Fx acting at a distance σ from point G. . This is true by considering the balance of moments around point G.

Here, I is the moment of inertia around point G. When the distance from point G to point A is a, the displacement XM of point A in the X direction due to the moment is XM-a·θ, so equation (6) is expressed as follows. Substituting equation (1-2) into equation (7) to find XM gives the following equation. The displacement X of the point A in the X direction is X-XG+XM, so the result is as follows.

Therefore, the motion trajectory of point A can be expressed by combining equations (3) and (9), with t being a parameter.

The AI equation is an elliptic equation, and it is proven that point A performs elliptic motion. The vibration rotational (elliptical) motion of point A and the resonance phenomenon of the wire coil cause the wire coil to rotate. As explained above, the present invention involves immersing the hook of a suspended wire coil while vibrating it with a rotary vibrator having a rotating shaft parallel to a plane including the annular axis of the wire coil. So,
The immersed wire coil can be smoothly rotated in the circumferential direction. Further, since the amplitude of the wire coil is large due to the resonance phenomenon, even if the binding wire 10 of the wire coil is made thick, it can easily overcome the support portion. In addition, in conventional immersion treatment equipment, it can be carried out by simply using a rotary vibrator as described above as the vibration device and installing its oscillation rotation axis as described above, making it easy to modify the equipment and greatly reducing costs. can contribute. Note that the rotary vibrator 9 provided on the beam 2 is shown with its oscillation rotation axis aligned in the width direction central part of the beam 2 along the length direction of the beam, but the oscillation rotation axis is The same effect can be obtained by displacing the beam in the width direction of the beam while remaining along its length, or by displacing it to either side in the width direction via a bracket.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view showing an example of a conventional vibrating pickling device, Fig. 2 is an explanatory view of the vibration in Fig. 1, Fig. 3 is a schematic cross-sectional view showing an embodiment of the present invention, and Fig. 4 is a schematic cross-sectional view showing an example of a conventional vibrating pickling device. FIG. 5 is a diagram schematically illustrating the structure of the present invention, and is a schematic diagram illustrating vibration and rotation of a wire coil. 1... Wire coil, 2... Beam material, 3.
...Hook, 4...Vibration device, 5...
...Bathtub, 7...Beam stand, 8...Buffer device, 9...Rotary vibrator, 10...
... Binding wire, 6... Pickling liquid.

Claims (1)

[Claims] 1. A wire coil is suspended from a hook and immersed in a treatment bath,
A vibration method in which a wire drawing coil is vibrated via a hook, in which a hook having a support portion extending in the length direction of the beam is fixed to the lower surface of a beam supported by a buffer member to support the beam. A wire coil is suspended from the beam, and the beam is equipped with a rotary vibrator that has a rotation axis in the length direction of the beam and whose excitation direction periodically fluctuates in a plane orthogonal to the beam. A method for vibrating a wire coil, characterized in that the vibration is transmitted to the wire coil through a hook, and the wire coil is vibrated while being rotated in the circumferential direction. 2. The vibration method according to claim 1, in which a beam is supported via springs provided at both ends thereof. 3. The vibration method according to claim 1 or 2, which is carried out by fixing a rotary vibrator approximately at the center of the beam in the longitudinal direction. 4. The vibration method according to claim 1 or 2, in which a plurality of rotary vibrators are fixedly installed in the longitudinal direction of the beam material and vibrated synchronously. 5 In any of claims 1 to 4,
A hook-shaped hook forms a hanging support section directly below the beam material that is almost parallel to the beam material, and one end is fixed to the beam material. A method of vibration performed by configuring the device to be located at the upper part of the suspension support. 6. The vibration method according to claim 5, which is carried out by configuring the rotation axis of the rotary vibrator to be located in a plane that is parallel to and slightly distant from a vertical plane containing the hook and the beam. . 7. In claim 6, the vibration method uses a vibrator with an excitation frequency close to the bending natural frequency of a wire coil as the rotary vibrator.