JPH0636933B2 - Hot slab conveyor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hot slab transfer device disposed in a hot slab transfer path in a width reduction device that reduces the width of a hot slab material by pressing. is there.

[Prior Art] When a hot slab material is subjected to width reduction by a width reduction device, the thickness reduction of the slab material due to the width reduction makes the thickness uneven in the width direction and the longitudinal direction of the slab material, and further in the vertical direction. Warping may occur.

In relation to this measure, the technique described in Japanese Patent Laid-Open No. 60-121008 has been proposed. This proposal describes a technique in which a pinch roll is provided on the inlet side of the width reduction device and a rolling mill or a forming machine is provided on the outlet side.
However, in the above-mentioned prior art, the pressing failure of the pinch roll due to the vertical warp of the slab on the inlet / outlet side of the width reduction device, the uneven increase of the slab thickness on the outlet side, and the uneven contact between the pinch rolls Further, there are problems such as the slab meandering, the slip between the pinch rolls, and the increase of the warp of the slab due to the pushing up of the slab by the lower pinch rolls.

[Problems to be solved by the invention]

As described above, in the conventional technique, there are problems such as meandering of the conveyed slab, slip between pinch rolls, and increase in warp of the slab. No consideration was given.

The present invention has been made in view of the above situation, and an object thereof is to provide a hot slab transfer device that can be stably carried out from a width reduction device for hot slab material.

[Means for solving problems]

In order to achieve the above object, the present invention is a hot slab transfer device provided on the outlet side of a width reduction device for reducing the width of a hot slab material by pressing, the housing being slidable in the vertical direction of the housing. A pair of upper and lower frames movably held, a pair of upper and lower pinch rolls respectively attached to the pair of upper and lower frames, and a pressing cylinder for vertically moving the pair of upper and lower pinch rolls through the pair of upper and lower frames. And a warm slab transfer device configured by a warm jack for setting the position of the lower pinch roll through the lower frame, wherein the pair of upper and lower frames are tiltably attached to the housing. So that the material can be sandwiched between the pair of upper and lower pinch rolls in an inclined state, and the hot slab material is sandwiched between the pinch rolls. Before entering, the standby position of the lower pinch roll is determined based on the thickness, width and width reduction amount of the hot slab material, and the lower pinch roll is set to the standby position determined by the worm jack. The hot slab material is moved to the upper pinch roll side by the pressing cylinder through the lower frame where the hot slab material enters between the pinch rolls, and the hot slab material is formed by the pair of upper and lower pinch rolls. It is designed to be sandwiched between.

[Action]

The hot slab transfer device provided on the outlet side of the width reduction device that reduces the width of the hot slab material by pressing, a housing,
A pair of upper and lower frames held slidably in the vertical direction of the housing, a pair of upper and lower pinch rolls respectively attached to the pair of upper and lower frames, and the pair of upper and lower pinch rolls through the pair of upper and lower frames. And a worm jack for setting the position of the lower pinch roll via the lower frame.

The hot slab material transferred to the hot slab transfer device provided on the outlet side of the width reduction device has the hot slab material meandering or warping in the vertical direction. In addition, the width reduction of the width reduction device may increase the thickness of the hot slab material unevenly.

In the present invention, since the pair of upper and lower frames of the hot slab transfer device is tiltably attached to the housing, the hot slab material can be sandwiched by the pair of upper and lower pinch rolls in an inclined state, Even when the hot slab material is meandering or warps in the vertical direction, the hot slab material and the upper and lower pinch rolls can be securely sandwiched without uneven contact, so stable transport of the hot slab material is possible. Becomes

Further, in the present invention, before the hot slab material enters between the pinch rolls, the standby position of the lower pinch roll is obtained in advance based on the thickness, width and width reduction amount of the hot slab material, and the lower pinch roll is used. Is set to the standby position obtained by the warm jack, the hot slab material warps in the vertical direction due to the width reduction of the width reduction device, and the thickness of the hot slab material Uneven thickness, or the hot slab material meanders even if it is pushed up by the upper and lower pinch rolls, slip occurs between the pinch rolls, and the vertical warp of the hot slab material increases. A stable hot slab material transfer is possible without causing any problems.

〔Example〕

The hot slab transfer device of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a front sectional view of a pinch roller and a frame portion, and FIG. 2 is a front sectional view of the housing of FIG. In the figure, 1 is a housing and 2 is a worm jack. The worm jack 2 is configured to vertically drive a lower pinch roll 8 via a lower pressing cylinder 4 and a lower frame 6. The lower pressing cylinder 4 constitutes a lifting / pressurizing device, and the worm jack 2 is a position adjusting lifting device. Are configured. Reference numeral 3 denotes an upper pressing cylinder of the lifting / pressurizing device, which presses the upper pinch roller 7 downward through the upper frame 5. The upper and lower pinch rolls 7 and 8 are supported by the upper and lower frames 5 and 6, respectively. Upper and lower frames 5,
As shown in FIG. 2, 6 is held slidably with respect to the housing 1. The upper frame 5 is supported by the upper pressing cylinder 3, and the lower frame 6 is supported by the worm jack 2 and the lower pressing cylinder 4 at both ends. ing.

Further, the contact portions at both ends of the upper and lower frames 5 and 6 with respect to the housing 1 are formed in an arcuate curved surface as shown in FIG.

Even if the end sliding surfaces of the upper and lower frames 5 and 6 are not an arcuate curved surface but a flat surface as described above, a desired inclination can be obtained by providing an appropriate gap with the housing 1. . Further, 9 is a hot slab, 10 is a press machine,
Reference numeral 11 is a detector, and 12 is a table roller.

By the way, before the hot slab 9 enters the positions of the upper and lower pinch rolls 7 and 8 of the hot slab transfer device arranged at the entrance of the press device 10, the thickness T, the width W and the width reduction of the hot slab 9 are reduced. The standby position ΔH of the lower pinch roll 8 is calculated from the amount ΔW.

That is, if the thickness of the hot slab 9 before the width reduction is H ₀ and the thickness of the hot slab 9 after the width reduction is H ₁ , the standby position ΔH of the lower pinch roll 8 is expressed by the following equation (1). Can be found at.

ΔH = H ₁ −H ₀ (1) Then, the standby position ΔH can be obtained by the following equation (2).

ΔH = f (W / T, ΔW) (2) From this ΔH, the position of the lower pinch roll 8 is made to stand by at a predetermined position by the elevating device for adjusting the position of the worm jack 2. And the hot slab 9 is the upper and lower pinch rolls 7,
The hot slab 9 is sandwiched by the upper and lower pinch rolls 7 and 8 which are pressed by the upper and lower pressing cylinders 3 and 4 when entering the upper part. In this case, signals are sent to the vertical pressing cylinders 3 and 4 according to the thickness, width and width reduction amount of the hot slab 9, and the standby position of the lower pinch roll 8 is adjusted. Insert between 8 smoothly, surely and quickly.

Therefore, the uneven contact between the hot slab 9 and the upper and lower pinch rolls 7, 8 and the pushing up of the hot slab 9 by the lower pinch roll 8,
Further, problems such as a slip between the upper and lower pinch rolls 7 and 8 and an increase in the warp of the hot slab 9 can be solved. The vertical pressing cylinders 3 and 4 may be replaced with vertical driving members such as screws.

By the way, as shown in FIG. 1, when the hot slab 9 warps upward, if the lower surface of the hot slab 9 rises by the path line indicated by the chain double-dashed line A set by the worm jack 2, if Without the pressing cylinder 4 and the worm jack 2, a gap is created between the lower pinch roll 8 and the hot slab 9 to reduce the carrying force. Further, since the hot slab 9 has a high rigidity, if the upper pressing cylinder 3 tries to press it against the lower pinch roll 8, the upper pressing cylinder 3 becomes so large that it is not economical.

Therefore, after the lower pinch roll 8 is arranged at a predetermined position by the worm jack 2 as in the present embodiment, the upper and lower pinch rolls 7 and 8 are pressed by the vertical pressing cylinders 3 and 4 with a predetermined pressure, and the hot slab 9 is pressed. It is necessary to pinch.

Further, by controlling the pressures of the upper and lower pressing cylinders 3 and 4 to be constant, the upper and lower pinch rolls 7 and 8 follow a change in the amount of warp and a change in the thickness of the hot slab 9 during transfer, and obtain a stable transfer force. be able to.

Further, as shown in FIG. 2, it is presumed that the thickness of the hot slab 9 becomes non-uniform in the width direction due to the width reduction. Therefore, by making the upper and lower pinch rolls 7 and 8 tiltable, the hot slab 9 can be inclined. Uneven contact with 9 can be prevented.

As described above, the hot slab transfer device according to the present embodiment measures the thickness, width, reduction amount, etc. of the hot slab in advance before the hot slab enters the positions of the upper and lower pinch rolls, and the lower pinch is determined by the signal. The standby position of the rolls is adjusted and the upper and lower pinch rolls are sandwiched between the upper and lower pinch rolls at the same time when it enters between the upper and lower pinch rolls. Can be stably transported.

〔The invention's effect〕

As described above, the hot slab transfer device of the present invention has the effect of stably transferring the hot slab.

[Brief description of drawings]

FIG. 1 is a front sectional view of a pinch roll frame portion of an embodiment of a hot slab conveyor according to the present invention, and FIG. 2 is a front sectional view of the housing of FIG. 1 ... Housing, 2 ... Worm jack, 3 ... Top pressing cylinder, 4 ... Bottom pressing cylinder, 5 ... Top frame, 6 ... Bottom frame, 7 ... Top pinch roll, 8 ...
Lower pinch roll, 9 ... Hot slab, 10 ... Press.

Front page continuation (72) Inventor Shigeru Ueki 1-chome, Mizushima Kawasaki-cho, Kurashiki City, Okayama Prefecture (without street number) Kawasaki Steel Works Mizushima Works

Claims (1)

[Claims] 1. A hot slab transfer device provided on the outlet side of a width reduction device for reducing the width of a hot slab material by pressing, the housing being held slidably in a vertical direction of the housing. A pair of upper and lower frames, a pair of upper and lower pinch rolls attached to the pair of upper and lower frames, a pressing cylinder for vertically moving the pair of upper and lower pinch rolls through the pair of upper and lower frames, and the lower pinch roll In a hot slab transfer device configured by a warm jack that sets the position of the hot slab through the lower frame, the pair of upper and lower frames are tiltably attached to the housing, and the hot slab material is attached to the upper and lower pairs. Pinch rolls so that they can be sandwiched in an inclined state, and before the hot slab material enters between the pinch rolls, The standby position of the punch roll is determined based on the thickness, width and width reduction amount of the hot slab material, and the lower pinch roll is set to the standby position determined by the warm jack, and the hot slab material is When entering between the pinch rolls, the lower pinch roll is moved to the upper pinch roll side by the pressing cylinder through the lower frame, and the hot slab material is sandwiched by the pair of upper and lower pinch rolls. A hot slab transfer device.