JPH01138019A - Mandrel for down-coiler - Google Patents

Abstract

PURPOSE:To improve the quality of a strip by composing the strip coil of segments moving only in a diametrical direction through an axial movement of the reciprocating shaft of a mandrel. CONSTITUTION:A segment 29 moves in a diametrical direction by moving a wedge ring 27 in an axial direction through a gradient part 28 and inclined part 30. In other words, the segment 29 forms an expanding and contracting guide 31 which slides only in a diametrical direction of the mandrel 32. Accordingly, the segment 29 moves only in a diametrical direction to expand the mandrel. In this way, the friction between the external circumference of the mandrel and the internal diametrical surface of the strip coil is removed to upgrade the quality.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a down coiler for winding up a sl-IJ tube rolled in a hot rolling facility.

<Prior Art> FIG. 4 is a conceptual diagram showing a side view of a conventional down coiler.

A neck portion of a mandrel 1 for winding a strip into a coil W is supported by a neck bearing 2 and is connected to an electric motor 5 via a speed reducer 3 and a sliding shaft 4. An outboard 6 is rotatably attached to the tip of the mandrel 1, and is supported by an outboard support (not shown) during winding of the coil W. In the figure, 7 is a hydraulic cylinder that expands and contracts the segments 8.

Details of the mandrel 1 are shown in FIGS. 5 to 7. Furthermore, the fifth
The figure shows a cross section taken along the line ■--■ in FIGS. 6 and 7.

A reciprocating shaft 10 connected to a hydraulic cylinder 7 is fitted into the axial hole of the mandrel shaft 9.
A ring 11 is fitted onto the outer surface of the ring.

A clasp 12 is fitted into the mandrel shaft 9, and the ring 11 is connected to the reciprocating shaft 10 by the clasp 12. A wedge ring 1 is attached to the outer surface of the mandrel shaft 9.
3 is fitted into the wedge ring 13, and the wedge ring 13 is provided with a plurality of tapered portions at circumferential self-rotating portions. The segment 8 is divided into four parts in the circumferential direction, and the divided parts mesh with each other. The segment 8 is slidably inserted into the ring 11 in a direction perpendicular to the axial direction, and the tapered portion of the segment 8 is slidably inserted into the tapered portion of the wedge ring 13.

The strip is wound up (this involves holding the tip of the strip with a presser roll (not shown) while rotating the mandrel l. After winding several layers, the hydraulic cylinder 7 moves the reciprocating shaft 10 in the direction of arrow A in FIG. Kotta 12 and ring 11
to expand the outer diameter by moving each segment 8 along the tapered part of the wedge ring 13 in the direction of arrow B in FIG. Secure it with cement 8 so that it does not slip. Coil W
When removing, the reciprocating shaft 10 is moved in the opposite direction to that described above to reduce the outer diameter of the segment 8 (FIG. 6).

(See right half of Figure 7).

Therefore, when winding the strip, the coil W comes into close contact with the mandrel 1 to ensure reliable winding, and when the coil W is removed, the outer diameter of the mandrel 1 is reduced, making it easy to remove.

<Problems to be solved by the invention> The conventional mandrel 1 has a large number of parts and has a complicated structure, and when expanding the diameter of the mandrel 1, the arrow B in FIG.
As the segment 8 moves in the axial direction as shown, friction occurs between the segment 8 and the strip of the first layer of the coil W, or between the strip of the second layer and the IJ tab of the coil W.
Problems have occurred in which the life of the segment 8 is shortened and the shape of the coils and coils W is deteriorated.

The present invention has been made to solve the above-mentioned problems.
It is an object of the present invention to provide a down coiler mandrel whose segments move only in the radial direction and whose number of members is small.

<Means for Solving the Problems> The configuration of the present invention for achieving the above object is a down coiler mandrel having a segment that moves in the radial direction by the movement of the reciprocating shaft in the axial direction, an outer shaft which is rotatably supported, a reciprocating shaft which is slidably axially but non-rotatably fitted into the center hole of the outer shaft, and a sloped portion attached to the outer periphery of the reciprocating shaft. The wedge ring is divided into at least three parts in the circumferential direction, and an inclined part is formed on the inner periphery to fit with the inclined part, and the wedge ring is fitted with the outer circumferential surface of the wedge ring by the inclined part. a segment, and a segment guide provided on the outer shaft for regulating the movement of the segment in the axial direction and guiding the movement of the segment in the radial direction when the reciprocating shaft moves in the axial direction. It is characterized by becoming.

Function: When winding the strip while rotating the mandrel by rotating the outer shaft, the reciprocating shaft is moved in the axial direction at the beginning of winding to separate the slope of the wedge ring and the slope of each segment. By sliding the strip coil and then moving the segment only in the radial direction of the mandrel using the segment guide to expand the diameter of the mandrel, the inner diameter of the strip coil is expanded to prevent slippage with the segment. When extracting the strip coil, the reciprocating shaft is moved in the opposite direction to that described above to reduce the diameter of the mandrel.

Embodiment> FIG. 1 shows a cross-sectional side view of a mandrel of a down coiler according to an embodiment of the present invention, FIG. 2 shows a view taken along the line ■-■ in FIG. 1, and FIG. In the middle (shows the line arrow view. In addition,
FIG. 1 shows a cross section taken along line II in FIG. 3.

The outer shaft 21 is supported by a neck bearing 2 (see FIG. 4), and a reciprocating shaft 22 is fitted into an axial hole of the outer shaft 21 so as to be slidable in the axial direction. The outer shaft 21 and the reciprocating shaft 22 are splines 23
are connected to each other so that they cannot rotate relative to each other.

A guide portion as a segment guide consisting of a guide bush 24 and a clamp 25 is provided at the outer periphery of the end of the outer shaft 21 .

An outboard 26 is slidably attached to the tip of the reciprocating shaft 22 with a predetermined stroke. A wedge ring 27 is fitted on the outer periphery of the reciprocating shaft 22, and the wedge ring 2
A plurality of slope portions 28 are provided at the outer circumferential section 7.

A segment 29 is fitted to the outer periphery of the wedge ring 27, and the segment 29 is divided into four parts in the circumferential direction, and each divided part is engaged with each other.

Further, an inclined portion 3o that fits into the inclined portion 28 of the wedge ring 27 is formed on the inner periphery of the segment 29, and the wedge ring 27 and the segment 29 are fitted with the inclined portion 28 and the inclined portion 3o. In other words, by moving the wedge ring 27 in the axial direction, the slope portion 28 and the slope portion 3o
The segment 29 is moved radially through. On the other hand, an expansion/contraction guide part 31 is formed in the segment 29, and the expansion/contraction guide part 31 is fitted into a guide part consisting of a guide bush 24 and a clamp 25, and the expansion/contraction guide part 31 slides only in the radial direction of the mandrel 32. It looks like this.

Incidentally, since the structure from the neck bearing 2 to the electric motor 5 is the same as that shown in FIG. 4, redundant explanation will be omitted.

The mandrel 32 is rotated by the rotation of the outer shaft 21 to start winding the strip, and when several layers have been wound, the reciprocating shaft 22 is moved in the direction of arrow Z in FIG. The reciprocating shaft 22 is supported by an outboard support (not shown) or the like via a sliding portion with the outer shaft 21, a spline 23, and an outboard 26.
The sliding part with the outboard 26 (stationary) slides. The wedge ring 27 moves together with the reciprocating shaft 22 and the ramp 28 slides between the ramp 30 of the segment 29.

Since the expansion/contraction guide portion 31 of each segment 29 is restricted in the axial direction by the guide bush 24, the segment 29 is movable only in the radial direction. Therefore,
When the slope portion 28 slides between the slope portion 30 and the slope portion 30 due to movement of the reciprocating shaft 22 in the Z direction, the segment 29 moves only radially outward, expanding the diameter of the mandrel 32. As a result, the inner circumferential surface of the strip coil that is being wound is expanded, and the segments 29 and the inner circumferential surface of the strip coil are fixed to prevent slippage. Also, when removing the finished strip coil from the mandrel 32, the reciprocating shaft 2
2 in the opposite direction to the above-mentioned direction, the fitting portion between the slope portion 28 of the wedge ring 27 and the slope portion 30 of the segment 29 guides each segment 29 to move the mandrel 32 inward, thereby reducing the diameter of the mandrel 32.

In the mandrel 32 described above, the wedge ring 27 for expanding and contracting the segments 29 is directly attached to the outer peripheral surface of the reciprocating shaft 22, so the structure of the mandrel 32 is simplified. Further, the expansion/contraction guide portion of the segment 29 is restricted by the guide bush 24, so that the segment 29 can move only in the radial direction.

<Effects of the Invention> In the down coiler mandrel of the present invention, a wedge ring is directly fitted onto the outer circumferential surface of the reciprocating shaft, and the sloped portion of the wedge ring and the sloped portion of the segment are fitted to fit the segment to the wedge ring. Since the axial movement of the segments is restricted by the segment guide, the structure of the mandrel is simplified, and the segments move only in the radial direction to expand the diameter of the mandrel. As a result, when winding of the strip is started and the diameter of the mandrel is expanded, there is no friction between the outer periphery of the mandrel and the inner diameter surface of the strip coil, making it possible to improve the quality of the strip coil and extend the life of the mandrel.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of a mandrel of a down coiler according to an embodiment of the present invention, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a view taken along the line I-■ in Fig. 1. 4 is a side view showing the concept of a conventional down coiler, FIG. 5 is a cross-sectional side view of the mandrel, FIG. 6 is a view taken along line M-M in FIG. 5, and FIG. It is a view taken along the line ■-■ in FIG. 5. In the drawing, 21 is an outer shaft, 22 is a reciprocating shaft, 24 is a guide bushing, 27 is a wedge ring, 28 is a slope portion, 29 is a segment, 30 is a slope portion, 31 is an expansion/contraction guide portion, and 32 is a mandrel. . Figure 6 Figure 7

Claims (1)

[Claims] A down coiler mandrel having a segment that moves radially due to axial movement of a reciprocating shaft,
an outer shaft that has an axial hole and is rotatably supported; a reciprocating shaft that is slidably axially but non-rotatably inserted into the axial hole of the outer shaft; and an outer shaft that is attached to the outer periphery of the reciprocating shaft a wedge ring having a sloped portion formed thereon; and a wedge ring that is divided into at least three pieces in the circumferential direction and has a sloped portion formed on the inner periphery that fits with the sloped portion, and that fits with the outer circumferential surface of the wedge ring by the sloped portion. a segment guide provided on the outer shaft for regulating the movement of the segments in the axial direction and guiding the movement of the segments in the radial direction when the reciprocating shaft moves in the axial direction; A down coiler mandrel characterized by consisting of.