WO2012091597A1

WO2012091597A1 - Method for forming coils and coil former for a wire rod

Info

Publication number: WO2012091597A1
Application number: PCT/RU2010/000798
Authority: WO
Inventors: Владимир Станиславович НЕКИПЕЛОВ; Вадим Петрович НОВИКОВ
Original assignee: Nekipelov Vladimir Stanislavovich; Novikov Vadim Petrovich
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2012-07-05
Also published as: EA022905B1; EA201370084A1

Abstract

The invention relates to rolling. The method comprises continuously feeding a wire rod through a duct to the rotating conical head of a coil former. The wire rod is made to move rectilinearly along the axis of rotation of the duct, is fed onto the surface of the conical head and is guided to move freely in the air, in order to form a finished coil, in such a manner that a tangent to the axis of the wire rod constitutes, at the point of convergence with the conical head, an acute angle with a plane perpendicular to the axis of rotation. The coil former comprises a coil-forming unit which comprises a conical coil-forming head, a tubular duct for the wire rod and a rotational drive for the coil-forming unit. The duct is arranged in a hollow shaft in the rotational drive and the longitudinal axis of said duct coincides at the entry end with the axis of rotation of the hollow shaft. The coil-forming unit is equipped with at least one guide for the wire rod and with a flange which is fixed to the coil-forming head and has an opening for the passage of the wire rod. The duct is rectilinear and the longitudinal axis thereof is inclined away at the exit end from the axis of rotation of the hollow shaft to a distance of not less than half of the internal diameter of the duct.

Description

METHOD FOR FORMING COILS AND ROLLER OF ROLLER

The invention relates to rolling production, in particular to methods for forming coils of wire rod, for example of steel or non-ferrous metals, and a device for its implementation, and provides a compact riot of wire rod with a diameter of up to 20 mm

Known methods of forming a riot by feeding a wire rod at a speed of up to 100 m / s, forming coils by means of a coil former, placing turns on a conveyor and feeding them into a shaft for accumulating and forming a riot, tying and crimping it (see, for example, A.A. Kugushin , Yu.A. Popov, High-speed rolling of wire rod, M., Metallurgy, 1982).

A device for implementing the specified method is known, including a turner, containing wiring, a turn-forming head and a drive motor, a conveyor for supplying turns of wire rod to the shaft for their accumulation and laying in a riot, and a device for crimping and strapping a riot (see ibid.). The winding head of the known device is usually a massive conical body with which the guide is curved in space (see also EP 0779115, IPC V21C 47/14, 06.16.97, DE 3819981, IPC V21C 47/10, 14.12.89 g.). In these devices, the internal diameter of the wiring (guide) is approximately 2-3% of the diameter of the formed turns, therefore, when the wire feed speed and the rotation speed of the wire are mismatched, the feed material is jammed and the process stops. In addition, the wire rod is fed through spatially curved wiring, with a total length of up to 4000 mm, where, over the entire length of the wiring, it is gradually shaped into a coil. That is, throughout the entire length of the wiring, the forces from plastic deformation of the wire rod and the corresponding friction forces act on it. The resistance to movement of the wire rod is significant, which limits the assortment to a range of wire rod diameters from 4.5 to 2 mm (at high temperature, not lower than 850 ° C), while winding heat-strengthened steel (at a winding temperature below 600 ° C) and a diameter of more than 7 mm , it becomes generally impossible, because the wire rod is stuck in the wiring due to the high resistance.

In the patents of the Russian Federation Νδ2192323, US Pat. U.S. NsUS 6,915,978 B2, US Pat. India NsB-MU \ 0643, US Pat. China N2206373, US Pat. Ukraine NS66956 (47/24, IPC B2 C), the issue of reducing the resistance to movement of wire rod inside the wiring has not been resolved, because the wiring has a curvature, acts on the wire rod and bends it with its walls, which increases resistance to movement. In addition, the issue of obtaining a high-quality first coil of wire rod has not been resolved here, since dynamic forces, as practice shows, are not enough for the front end of the turn to meet with the protective casing at an acute angle and not receive undesirably high curvature (in industry, its curvature was 2-3 times greater than required.

Closest to the proposed technical solution is contained in RF patent NS2270730, PC V21C, 08/02/2004. A method for forming a wire rod rip is described here, including continuous wire rod feeding through the wire, wire rod deflection at the exit from the wire at an angle to the axis of rotation, coil formation wire rods of variable diameter on a curved concave surface by changing the rotation speed of the wiring and providing two degrees of freedom for the movement of the wire rod under the action of dynamic forces and laying the obtained turns horizontal with in loops at the height of the riot, where the wire rod is fed at a speed of 1-300 m / s, and at the exit from the wiring, before the wire is fed to the curved concave surface, the wire rod is deflected in space so that the projection of the wire rod axis at the exit from the wiring in a plane drawn through the axis rotation of the wiring and the exit point of the wire rod from the wiring, made an angle of 10-80 ° with the axis of rotation of the wiring, and an angle of 12-60 ° in the plane perpendicular to the axis of rotation of the wiring, with a radius drawn from the axis of rotation of the wiring to the exit point of the wire rod.

In this patent, the problem of obtaining a high-quality first turn is solved by giving the wire rod a curvature in the plane perpendicular to the axis of rotation, as a result, the front end of the turn meets the casing at an acute angle, which reduced the shock load on the wire rod along its longitudinal axis and made it possible to obtain a high-quality first turn. However, since additional curvature of the coil is attached inside the wiring, this increases the contact load and, as a consequence, the resistance to movement. This leads to accelerated wear of the wiring, as well as to frequent jamming in the wiring of a hot wire rod with a diameter of more than 12 mm, and for a heat-strengthened wire rod, the jam threshold decreases even further - up to 7 ... 9 mm. This significantly limits the range of wire mills and leads to significant economic losses.

The technical result achieved by the present invention is to expand the assortment of turns of steel wire rod formed on a coil former to a circle of 20 mm or more by reducing the resistance to its movement, to obtain a high-quality shape of the first coil of wire rod, as well as reducing wear of parts of the wire system by reducing contact loads.

The technical result is achieved by the fact that in the method of forming wire rods, including the continuous supply of wire rod through the wiring to a rotating conical head in the wire rod, they give a rectilinear movement along the axis of rotation of the wiring, then it is fed to the surface of the conical head, after which the wire rod is sent into free movement in air for the formation of a finished coil in such a way that the tangent to the axis of the wire rod at the vanishing point of the conical head is an acute angle with a plane perpendicular B rotation. The technical result is also achieved by the fact that the winding wire rod containing a winding unit, including a cone-shaped winding head and a wire rod of the wire rod, the rotation drive of the turning node, while the tubular wiring is located in the hollow shaft of the rotation drive, its longitudinal axis at the input end coincides with the axis of rotation of the hollow the shaft, the coil-forming unit is provided with at least one guide rod and a flange made of at least one hole for passing the wire rod and attached nym to the laying head, the tubular wiring is straight, and its longitudinal axis at the outlet end of the hollow shaft is inclined from the rotation axis by a distance not smaller than half the inner diameter of the tubular wire.

And also the fact that the angle between the generatrix of the cone-shaped winding head and its base is less than 90 °.

And also by the fact that the generatrix of the cone-shaped winding head is a straight and / or curved line.

And also the fact that the turner is equipped with a clamp covering the wiring of the wire rod and attached to the turn-forming head.

And also the fact that the turner is equipped with a conductor attached to the flange.

And also the fact that the cone-shaped winding head is made of at least two parts.

And also the fact that the guide (s) wire rod (s) is mounted on a cone-shaped winding head.

And also the fact that the guide (s) wire rod (s) is mounted on the jig.

And also the fact that the guide (s) wire rod (s) is made in the cross section curved.

And also by the fact that the guide (s) of the wire rod (s) is made in the cross section rectilinear.

And also the fact that the guide (s) wire rod (s) is made in the longitudinal direction rectilinear.

And also the fact that the guide (s) wire rod (s) is made in the longitudinal direction curved.

And also the fact that the inner surface of the output end of the tubular wiring is coated with a wear-resistant coating

And also the fact that the tubular wiring is installed with the possibility of permutation by rotation around its longitudinal axis, by a step of at least a wire rod diameter h> d.

As well as the fact that the turner is equipped with nozzles for supplying cooling air to the hollow shaft and is made with holes in the flange for venting air from the hollow shaft. .

four

The coil generator (Fig. 1) of the wire rod contains a frame 1 on which the housing 2 is fixed. In the housing 2 there is a drive including a drive motor 3 and a hollow shaft 4 mounted in the housing 2 on bearings 5, and a coil-forming wire rod assembly (Fig. 2, 3 ) located in the hollow shaft 4 and including a tubular wiring 6, through which a wire rod 7 is fed, a cone-shaped head 8, on which turns of a wire rod 7 are formed, a clamp 9 attached to the cone-shaped head 8 and covering the output end (from which the wire rod 7) leads 6, flange 10, fixed crepe hedgehog elements 11 to the hollow shaft 4, the guide 12 for wire rod 7, (Fig. 3). The guide 12 can be made in the cross section curved (Fig. 4, option 1) or rectilinear (Fig. 4, option 2) and mounted on a conical head 8 (Fig. 4, option 1) or on the conductor 13 (Fig. 4 , option 2), which is attached to the flange 10. (Fig. 2, Fig. 3). The guide 12 can be made rectilinear in the longitudinal direction. The guide 12 can be made curved in the longitudinal direction. The wraparound assembly may have one or more than one guide 12. In the flange 10 (Fig. 5), one or more holes 14 are made for the release of wire rod 7 from the wiring 6.

The cone-shaped head 8 is made of two parts, which are attached to the flange 10 with fasteners pos. 15, pos. 16 and pos. 17 (Fig. 6). The input end of the wiring 6 is enclosed in a support part 18 attached to the hollow shaft 4 (Fig. 6). The generatrix of the cone-shaped head 8 is a straight and / or curved line, and the angle between the generatrix of the cone-shaped winding head and its base is less than 90 °, the preferred angle is 50-85 ° (Fig. 2). The jig 13 is designed to accurately guide the front end of the wire rod 7 into the holes 14 of the flange 10, a clamp 9 can be attached to the flange 10.

The longitudinal axis of the wiring 6 coincides with the axis of rotation of the hollow shaft 4 at its inlet end, and at the output end deviated from the axis of rotation of the shaft 4, at least a distance equal to or greater than half the inner diameter of the tubular wiring; (h min. = Inner. / 2) (Fig. 7). The inner surface of the output end of the tubular wiring 6 is coated with a wear-resistant coating 19 (Fig. 7). The tubular wiring 6 can be rearranged, turning around its longitudinal axis, by a step of at least the diameter of the wire rod had, which allows to extend its service life by about n = P / d times, where P is the circumference of the inner hole of the wire, d is the diameter of the wire rod (Fig. . 8). To cool the internal cavity of the shaft with the wiring, purging with cold air is provided, which is pumped through the nozzles 20 and leaves the cavity of the shaft through the holes 21 in the flange 10 (Fig. 1 and Fig. 6).

To receive turns of wire rod there is a stacking device, including a roller conveyor 22 with a rotary plate 23, changing its angle of inclination by force ,

about

the cylinder 24. The place of descent of the turns of wire rod 7 from the coil-forming head 8 is closed by a casing 25 (Fig. 1).

The formation of turns of wire rod is as follows. The motor 3 rotates the hollow shaft 4 which rotates the cone head 8 through the flange 10. The cone head 8 transmits the rotation to the conductor 6 through the clamp 10. The rotation is also transmitted to the conductor 13 fixed to the flange 10. A wire rod 7 is fed to the inlet end of the conductor 6, which is deflected by the conductor 6 from movement along the axis of rotation, without bending, and is released from the wiring 6 onto a cone-shaped head 8, where under the action of dynamic forces it begins to deviate from the plane in which the axis of the wiring 6 and the axis of rotation are located, its trajectory moves In this case, for the front end of the wire rod 7, defines a guide 12 mounted in the conductor 13 or on the conical head 8 as shown in FIG. 3 and 4. After the formation of the coil from the front end of the wire rod 7, it no longer contacts the guide 12. The guide 12 of the wire rod 7 is fed through one of the holes 14 of the flange 10 along the conical head 8. The wire rod 7 is deflected and curved until it leaves the conical head 8, at an acute angle δ to the plane perpendicular to the axis of its rotation, (Fig. 10). After the descent of the wire rod from the conical head 8, the formation of turns is completed in the air, as described in the prototype. The pivot plate 23 of the stacking device at this time is in a position where its plane is perpendicular to the axis of rotation of the turner and is close to the plane of the turn of the turns at a distance approximately equal to the radius of the turn. The first formed coil lies on the rotary plate 23 of the stacking device, which, with the help of a drive, for example, a power cylinder 24, is lowered onto the roller conveyor 22 below the level of the rollers. Thus, the coil is laid on the conveyor 22 immediately with the entire plane, which prevents deformation of its end.

During operation of the device, the internal cavity of the shaft 4 with the wiring 6 is cooled by blowing with air pumped through the nozzles 20 and exiting the cavity of the shaft 4 through the holes 21 in the flange 10.

An example implementation of the method.

A wire rod with a diameter of d = 12 mm made of Zgps steel at a temperature of 650 ° C (σ МП = 570 MPa, class A500) was fed at a rolling speed of V = 22 m / s into wiring 6, the output end of which is deviated from the axis of rotation, then fed to a conical head 8, the generatrix of which is a combination of a straight and curved lines, while the movement of the front end of the wire rod inside the jig 13 was limited in the direction coinciding with the direction of rotation with the help of the guide 12, the guide 12 through the hole 14 in the flange 10, the wire rod was fed to a curved surface of the cone 8, from where it descended at an acute angle to the plane 26, perpendicular to the axis of rotation of 27 degrees (FIG. 10) (the angle of descent depended on changes rotation speed), while in the air formed coils of variable diameter. Due to the fact that the first coil of wire rod 7 received preliminary curvature on the cone-shaped head 8 and the guide 12, its front end descended from the cone-shaped head 8 at an acute angle to the radius drawn from the axis of rotation to the vanishing point of the wire rod, the axial impact of the wire rod 7 on the casing 25 did not occurred and the first round was formed of the required diameter. Laying the front coil of wire rod 7 using the styling device occurred immediately with the entire plane, which ensured the absence of undesirable deformations in it. Due to the small curvature of all elements 6, 8, 12, the resistance to movement of wire rod 7 was reduced by an average of 2–3 times, and even heat-strengthened wire rod was wound without jamming. Correspondingly, the contact loads from the moving wire rod on the elements 6, 12 and 8 of the coil former were reduced by a factor of 2–3, which made it possible to increase their wear resistance.

Claims

CLAIM

1. The method of forming wire rods, including the continuous supply of wire rod through the wiring to a rotating cone-shaped head of the coil former, characterized in that in the wire rod they give a rectilinear movement along the axis of rotation of the wiring, then it is fed to the surface of the cone-shaped head, after which the wire rod is sent into free movement in air for the formation of the finished turn so that the tangent to the axis of the wire rod at the point of exit from the conical head is an acute angle to a plane perpendicular to the axis in ascheniya.

2. A winding rod of a wire rod containing a winding assembly including a cone-shaped winding head and a tubular wire of a wire rod, a rotation drive of a spiral forming assembly, the tubular wiring being located in the hollow shaft of the rotation drive, and its longitudinal axis coinciding with the axis of rotation of the hollow shaft, characterized in that that the winding unit is provided with at least one guide rod and a flange made of at least one hole for passing the wire rod and attached to the winding olovke tubular wiring is straight, and its longitudinal axis at the outlet end of the hollow shaft is inclined from the rotation axis by a distance not smaller than half the inner diameter of the tubular wire.

3. The winder according to claim 2, characterized in that the angle between the base and the generatrix of the cone-shaped winding head is less than 90 °.

4. The winder according to claim 2, characterized in that the generatrix of the cone-shaped winding head is a straight and / or curved line.

5. The turner according to claim 2, characterized in that it is provided with a clamp attached to the turn-forming head and covering the wire rod.

6. The winder according to claim 2, characterized in that it is provided with a conductor attached to the flange.

7. The winder according to claim 2, characterized in that the cone-shaped winding head is made of at least two parts.

8. The winder according to claim 2, characterized in that the guide rod (s) of the wire rod (s) are mounted on a cone-shaped winding head.

9. The turner according to claim 2, characterized in that the guide rod (s) of the wire rod (s) are mounted on the conductor.

10. The turner according to claim 2, characterized in that the guide (s) of the wire rod (s) is made in a cross-section curved (s).

11. The winder according to claim 2, characterized in that the guide rod (s) of the wire rod (s) are made in the cross section of the rectilinear (s).

12. The winder according to claim 2, characterized in that the guide (s) of the wire rod (s) are made in the longitudinal direction in a straight line (s).

13. The turner according to claim 2, characterized in that the guide (s) of the wire rod (s) are made in the longitudinal direction curved (s).

14 The wringer according to claim 2, characterized in that the inner surface of the output end of the tubular wiring is coated with a wear-resistant coating.

15. The turner according to claim 2, characterized in that the tubular wiring is installed with the possibility of reinstallation by turning around its longitudinal axis, by a step not less than the diameter of the wire rod h £ d.

16. The turner according to claim 2, characterized in that it is provided with nozzles for supplying cooling air to the hollow shaft and is made with holes in the flange for venting air from the hollow shaft.