JPH0985518A - Metal strip processing equipment - Google Patents

Abstract

(57) [PROBLEMS] A metal band processing apparatus for manufacturing a metal band having a special longitudinal end shape for use in reducing lap marks. Providing a compact and compact device. A shearing machine (1) for cutting a longitudinal end portion of a metal band (4) in a width direction so that a width of a tip portion becomes narrower from both end portions.
2 and a rolling mill 3 for rolling the tip of the sheared metal strip
It is characterized by having. Furthermore, the longitudinal end portion of the metal strip 4 has a plurality of triangular shapes in the width direction, a trapezoidal shape, an arc shape, a saw blade shape, a shape similar to these or a combination thereof,
Alternatively, it is characterized by including shearing machines 1 and 2 for cutting into one or more end shapes of the mixed shape, and a rolling machine 3 for rolling the tip end of the sheared metal strip.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for processing a metal band, and has a special shape at the longitudinal end to reduce lap marks during winding.

[0002]

2. Description of the Related Art When winding a metal strip, it is wound around a winding machine called a mandrel or reel. This time,
Defects often called mandrel marks, reel marks, lap marks, and top marks occur.

The main one of these defects is a bent mark generated in the portion overlapping the tip end after the second winding because the leading edge of the metal strip is rectangular.

These marks (generally referred to as lap marks hereinafter) occur on every line accompanied by winding of metal strips, and various countermeasures and proposals have been made.

The main one of the prior arts is a method using a press machine incorporating a shearing machine (Japanese Utility Model Laid-Open No. 42727/1990) and a method of rolling the tip end portion with a rotary shear (Japanese Patent Application Laid-Open No. Hei 2 (1999)).
-83111) Method of grinding with a grindstone Method of rolling the tip in the width direction (Japanese Patent Laid-Open No. 59-218)
No. 201, JP-A-3-198917, and Japanese Utility Model Laid-Open No. 62-77610).

[0006]

The above-mentioned technique requires a load of 1000 tons or more to directly press, so that it is industrially very large.

[0007] In the technique of (1), at the same time as shearing with a drum shear, processing is performed by rolling once in the length direction of the metal strip.
In addition, a load of 1000 t or more, which is similar to that of a normal rolling mill, is required.

In the mechanical grinding process, when the tapered shape becomes long, the processing time becomes long, and when the processing of the grinding dust is incomplete, it causes another new defect, and its countermeasure is a problem. Become.

In the technique of (1), since the rolling is performed in the width direction, the flow of the material (the tip of the metal strip) is preferential in the width direction, but there is a constraint in the non-rolling portion that is not subjected to tapering. In addition, the rolling pressure becomes large, and the corrugation is likely to occur at the tip, and if corrugation occurs, the meaning of taper processing is halved, and if the corrugation is large, overlap may occur during rolling and another defect may occur. . In addition, in order to secure the processing length by one rolling process, a load similar to a normal rolling mill is required.

SUMMARY OF THE INVENTION In order to solve these problems, an object of the present invention is to provide a compact processing apparatus for a metal strip, which does not generate processing waste when processing a longitudinal end portion of a metal strip and has a small processing load. For the purpose of provision.

[0011]

According to the first aspect of the present invention,
A shearing machine for cutting the longitudinal end of the metal strip in the width direction so that the width of the tip becomes narrower from both ends, and a rolling mill for rolling the sheared tip of the metal strip. This is a metal band processing device.

By tapering the width, stress concentration at the same position in the width direction is prevented, and the surface pressure is reduced to a certain length (the plate thickness is made small),
Prevent the occurrence of lap marks. In addition, the plate thickness of the long end of the metal strip is tapered in the direction of the long end so that the metal strip can be deformed along the winder during winding without any surface pressure between the second strip and the metal strip. Is.

Further, prior to rolling, the width of the longitudinal end of the metal strip is narrowed by shearing to reduce the rolling area, thereby reducing the rolling load, facilitating the working, and shortening the working time compared with the full width working. Since the rolling mill is shortened and the rolling mill is made compact, and rolling is performed, machining waste is not generated in a shorter time than cutting.

The widthwise processing of the longitudinal end shape is carried out by shearing, usually by punching shearing, trapezoidal, triangular,
Any shape such as an arc shape or a saw blade shape may be used as long as the width of the tip portion is narrowed, and a punching machine that punches out the entire width at the same time in the width direction or a punching shearing machine that punches out a plurality of times may be used.

That is, the longitudinal ends of the metal strip are one or more ends having a triangular shape, a trapezoidal shape, an arc shape, a saw blade shape, a shape similar to these or a combination thereof, or a mixed shape thereof in the width direction. It is preferable to include a shearing machine for cutting into a shape and a rolling mill for rolling the tip end of the sheared metal strip.

This punching shearing machine may be used together with a cutting machine for removing defective parts in the metal strip processing process line.

As a processing device for the metal strip, a punching shearing device for punching in the width direction in-line and a rolling mill for tapering in the plate thickness direction are connected in series, or all are provided outside the line to perform processing in advance. You may arrange so that it can. At this time, a plurality of lines may be arranged so that they can be processed in advance.

As a metal band processing device, in order to prevent the occurrence of a lap mark in the next step, the metal band is similarly arranged inline or outside the line so that the above-mentioned processing is applied to the tail end when winding the metal band. You may set it up.

There may be inspection, oiling, plating, painting, slitting, side trimming, insertion of interleaving paper, etc. between the metal band processing device and the winding machine. Good.

[0020]

1 is a side sectional view of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view of the upper shearing machine 1 and the lower shearing machine 2 shown in FIG. 1, showing only the upper shearing machine 1 in detail.

FIG. 3 is a front view seen from the rolling mill 3 side in FIG.

The upper shearing machine 1 and the lower shearing machine 2 shown in FIG.
FIG. 3 is a sectional view taken along the line AA of FIG.
-B is a sectional view.

The apparatus according to the first embodiment has an upper shearing machine 1 and a lower shearing machine 2 incorporating a cutting tool for shearing the end of the metal strip into a saw blade shape, and the end of the sheared metal strip 4. Is a device that is composed of a pinch roll type (double) rolling mill 3 for tapering.

In the upper shearing machine 1, the upper blade 11 is fixed to the upper blade holder 13 by the fixing bolts 14a and the upper blade 12 is fixed by the fixing bolts 14b (shown in FIG. 5).
Is fixed to the upper blade holder fixing flange 17, the flange 16a at the tip of the cylinder rod 16 of the lifting cylinder 15 and the upper blade holder fixing flange 17 are connected, and the upper blade holder 1
The guide portion 13a of No. 3 is moved along the lift guide 18 and is lifted by the lift cylinder 15.

The housing is a frame 19 and a reinforcement 25a,
25b and 26, and a reinforcement 15b for fixing the flange 15a of the lifting cylinder 15.

The housing of the rolling mill 3 includes a frame 37, reinforcements 35, 38 and 39, and a flange 3 of the reduction cylinder 33.
It is composed of a fixing reinforcement 33b of 3a.

The ascending / descending structure is such that the rolling rolls 30a and 30b are supported between the frames 37 by the bearings 31a and 31b, respectively, and are held while adjusting the height by the rocker plate 36 and fixed to the upper bearing 31a. Using the flange 31c for fixing the rod 32 and a balancer for synchronizing the vertical movement of the rolling roll 30a in the cylinder direction, the rolling roll 30a
The pressing cylinder 33 and the pressing cylinder rod 32 move up and down.

The balancer is composed of a pinion 34a fixed to the upper bearing 31a and a rack 34b processed or fixed to the frame 37.

Further, scrap conveyors 27 for cut pieces are arranged close to each other. Since the upper shearing machine 1, the lower shearing machine 2 and the rolling mill 3 are installed in a common housing and arranged so that the work of two steps can be performed closely, the metal strip 4 of the metal strip 4 can be processed in the process line incorporating this device. The stop time when processing the end is several seconds.

When the tip of the metal strip 4 reaches the shearing machines 1 and 2, the line is stopped and the upper shearing machine 1 is moved to the lifting cylinder 1.
5 is lowered to shear the tip of the metal strip into a saw blade shape with the fixed lower shearing machine 2. At the same time, the rolling roll 30a is lowered by the reduction cylinder 33 and rotated by a rotary drive (not shown).

Then, the line is moved again, and the leading end of the metal strip 4 sheared in a saw blade shape is fed into the rolling mill 3 between the plate passing table 8 and the plate passing guide 9, and the rolling rolls 30a,
Rolling (rolling down) between 30b and continuing the line operation as it is.

The rolling rolls 30a and 30b are preferably satin-finished in order to improve the biting property of the metal strip 4.

FIG. 4 is a plan view of the upper shearing machine 1 of FIG.

FIG. 5 is a sectional view of the blade portion of the upper shearing machine 1 of FIG.

FIG. 6 is a plan view of the lower shearing machine 2 of FIG.

FIG. 7 is a sectional view of the blade portion of the lower shearing machine 2 of FIG. 1, and is a sectional view taken along line EE of FIG.

The shearing blade is composed of upper blades 11 and 12 as shown in FIGS. 4 and 5 and a lower blade 21 as shown in FIGS. The upper blade is composed of a blade 11 divided into a plurality of saw blade units in the width direction of the metal strip 4 and one blade 12 in the width direction, and the lower blade 21 is a saw blade unit in the width direction of the metal strip 4. It is divided into multiple pieces. This aims at local measures against the wear of the cutting edge by cutting the width of various metal strips (replacement of the cutting tool), manufacturing of a cutting tool having a complicated shape, polishing of the cutting tool, and easy installation of the cutting tool.

Further, as shown in FIG. 4, the upper blade is composed of two blades 11 and 12 to form one saw blade.
One blade may be used, or the lower blade 21 may be composed of two blades.

The blade shape is provided with a rake in order to reduce the shear load. In addition, in the case of this embodiment,
As for the upper blade 11, as shown in FIG.
3, the mounting position is fixed in the width direction by the fixing bolts 14a by changing the height (like 11a, 11b, ..., 11e) to reduce the shear load. This is applied to the ascending and descending blade (the upper blade in this case) in order to keep the pass line of the metal strip 4 constant.

The rake whose height in the width direction of the upper blade 11 is changed is provided gently from the center in the width direction to the end in the width direction as shown in FIG. This may be reversed, or a rake may be provided from one end to the other end. However, it is better to provide the cutting edge continuously so that the metal strip is not unreasonably weighted.

The lower shearing machine 2, as shown in FIG.
1 is fixed to the lower blade holder 22 with fixing bolts 23, and is fixed to a lower blade base / reinforcement 24 (shown in FIG. 1).

FIGS. 8, 10, 11, and 12 respectively show second to fifth embodiments (shapes of the longitudinal ends of the metal strip) of the present invention.

First, FIGS. 8 (a) and 8 (b) are a plan view (a) and a side view (b) showing a second embodiment of the present invention, wherein the shape of the long end of the metal strip is a straight triangular shape. Then, the plate thickness of the tip portion is rolled into a taper shape.

FIG. 9 is a graph obtained by rolling the punched shape of FIG. 8A, showing that the rolling load per unit width is almost proportional to the reduction amount (working amount). The roll diameter is 200 m.
When applied to a steel strip having a plate thickness of 1.5 mm by a rolling mill of m, and from this fact, if the tip working width shape is inversely proportional to the reduction amount, tapering can be performed with a substantially constant rolling load. Indicates. This shows that processing control can be significantly facilitated.

That is, when tapering the entire width, it is necessary to change the roll gap to a predetermined taper. Therefore, when the line speed is high, the control response becomes a problem. Further, even in low speed machining, the control device is inevitably expensive. On the other hand, in the case of this device, if the required rolling load is obtained in advance according to the hardness and thickness of the material, the value is used to set the rolling load to the predetermined value with the hydraulic rolling device with the rolling mill. By keeping it constant at
The plate thickness according to the working width will be automatically obtained. The rolling load does not have to be strictly constant, and even a slight change does not hinder the purpose of the present invention.

FIGS. 10 (a) and 10 (b) are a plan view (a) and a side view (b) showing the third embodiment of the present invention, in which the shape of the longitudinal end of the metal strip is an arc shape. There is. FIG.
(A) and (B) are a plan view (A) and a side view (B) showing a fourth embodiment of the present invention, in which the shape of the longitudinal end of the metal strip is a two-step angle of an arc at the tip. There is. Each of them is formed by rolling the plate thickness of the tip portion into a tapered shape. These, Figure 1
The embodiment of FIG. 0 and FIG. 11 is preferable because the bite front end mark at the time of rolling can be prevented as compared with the linear triangular embodiment of FIG.

FIGS. 12A and 12B are plan views showing a fifth embodiment of the present invention, in which the saw blade shape shown in the first embodiment is slightly changed. The plate thickness has a taper shape (not shown) as in the other embodiments.

The interval in the width direction such as a trapezoid does not have to be constant, but it is an important factor in preventing the occurrence of lap marks. If this interval is too large, the winding tightening force after the second winding cannot be resisted, and there is a possibility that bending deformation may occur after the second winding and the generation of the lap mark cannot be prevented. Moreover, if the interval is narrow, the effect of reducing the load for tapering becomes small, and the apparatus becomes large.

The optimum interval varies depending on the plate width, the plate thickness, the hardness of the material, etc., but experiments by the inventor have confirmed that the range is 50 mm to 200 mm for the steel strip. The width of the processed part is 0 to 20 mm at the tip and 30 from the tip.
The range of 20 mm to 60 mm is preferable at mm.

Further, in order to secure the continuity in the longitudinal direction of the metal strip in the plate thickness tapering, it is desirable that the shape of the cut portion is not a rectangle but an inverted triangle or an arc shape as shown in FIG. Further, even if the shapes are different in the width direction, the most distal end portions may not be aligned in the width direction.

FIG. 13 is a graph showing the tendency of the strip thickness distribution of the steel strip which was subjected to constant load rolling by the metal strip processing apparatus of the present invention. The rolling gap of the roll diameter was 200 mm using a rolling machine with a roll diameter of 200 mm. It was opened to a plate thickness of 1.6 mm or more, and was subjected to constant load rolling by a method of applying a hydraulic load between work rolls with a decrease bender. At this time, the steel strip was subjected to trapezoidal processing in which the widths of the two tips were narrowed, and the width of the upper side of the trapezoid was 5 mm and the height of the trapezoid was 40 mm, and the width of the base of the trapezoid was 3
0 mm, the trapezoidal space is an inverted triangle, and the rolling load is 10
It was rolled at 20 Ton. The taper shape can be gently adjusted by the rolling load, and the taper shape with a good plate thickness is 1/20 of the conventional full width rolling to prevent lap marks.
It was obtained with a rolling load of ˜1 / 10.

Under the conditions as shown in the figure, when the total width of the tip is 1/10 of the original width, the rolling load is 1 m of the original width.
At that time, it becomes about 88 tons, which is a very small structure as a rolling mill. That is, according to this method, the rolling load at the time of rolling can be reduced, and the taper rolling can be performed very easily.

FIG. 14 is a layout diagram of a line to which the present invention is applied. The metal band 4 is cut at its tip end at a right angle in the width direction by a cutting machine 6 or is cut at a large angle to narrow the entire width of the tip end. After that, the tip is punched out by the shearing machines 1 and 2 into a shape in which the width of a plurality of tips is narrowed in the width direction, and the punched part is rolled into a taper shape in the plate thickness direction by the constant load rolling machine 3 and wound. It is a device for winding by the winding machine 5.

As another device, the cutting machine 6 is not provided,
Even if the punching and shearing machines 1 and 2 perform punching into a shape in which the widths of a plurality of tips are narrowed in the width direction, and subsequently the rolling machine 3 rolls the punched part into a taper shape in the plate thickness direction and then winds it. Good.

When the punched shape is used for both the tip and the tail end, it is desirable that the shape after punching the tip and the tail end is reversed.

Further, although the punching shapes of the punching machines 1 and 2 may be used for both the tip portion and the tail end portion, it is possible to select a more appropriate punching shape by providing a plurality of punching shapes. In this case, it is preferable that a shearing machine is also provided on the entrance side of the punching machine.

FIG. 15 is a layout diagram of another line to which the present invention is applied. The punching shearing machine 1 of the apparatus shown in FIG.
2 is a device in which a tip end heater 7 is attached between the constant-load rolling mills 3 following 2. Since the volume to be heated is a few fractions to 1/10 of the total width, it is possible to obtain benefits such as a reduction in input energy and a reduction in time required for heating.

The tip end heater 7 may be provided only on the inlet side of the cutting machine 6 and / or the punching shears 1, 2, or may be provided together with the inlet side of the constant load rolling mill 3. With respect to other devices or modes of usage, the same layout or usage as in the case of FIG. 14 can be used.

FIG. 16 is a graph showing the length of the lap mark by the number of windings when the steel strip to which the apparatus for processing a metal strip of the present invention is applied and the steel strip of the comparative example are wound.

A, B and C indicate the degree of the lap mark,
A is very light, B is light, and C is heavy. FIG.
As shown in FIG. 6, the length of the lap mark is smaller than that of the steel strip obliquely cut at an angle of 40 ° in the width direction of the comparative example. In addition, a taper length of 30 mm with a uniform width in the comparative example
The length of the lap mark is shorter than that of the steel strip.

FIG. 17 is a graph showing the taper length and the lap mark generation tendency when the taper-shaped steel strip at the tip of FIG. 12A is wound. It can be seen that lap marks do not occur if properly taken.

[0063]

Industrial Applicability According to the present invention, prior to rolling, the width of the longitudinal end of the metal strip is narrowed by shearing to reduce the rolling area to reduce the rolling load, thereby making the rolling mill compact, and Since it is rolling, it is a processing device that does not generate processing chips in a shorter time than cutting processing, and does not generate lap marks.

[Brief description of drawings]

FIG. 1 is a side sectional view according to a first embodiment of the present invention.

FIG. 2 is a front view of the upper shearing machine 1 and the lower shearing machine 2 shown in FIG.

FIG. 3 is a front view seen from the rolling mill 3 side in FIG. 1.

FIG. 4 is a plan view of the cutter shape of the upper shears 1 of FIG.

FIG. 5 is a side sectional view of a blade portion of the upper shears 1 of FIG.

FIG. 6 is a plan view of the lower shearing machine 2 of FIG.

FIG. 7 is a side sectional view of a blade portion of the lower shearing machine 2 of FIG.

8A and 8B are a plan view (A) and a side view (B) showing a second embodiment of the present invention.

FIG. 9 is a graph showing that the punched shape of FIG. 8A is rolled and that the rolling load per unit width is approximately proportional to the reduction amount (working amount).

10 (a) and 10 (b) are a plan view (a) and a side view (b) showing a third embodiment of the present invention.

11 (a) and 11 (b) are a plan view (a) and a side view (b) showing a fourth embodiment of the present invention.

12 (a) and 12 (b) are plan views showing a fifth embodiment of the present invention.

FIG. 13 is a graph showing the tendency of the strip thickness distribution of steel strips subjected to constant load rolling by the metal strip processing apparatus of the present invention.

FIG. 14 is a layout diagram of lines to which the present invention is applied.

FIG. 15 is a layout diagram of another line to which the present invention is applied.

FIG. 16 is a graph showing the length of a lap mark by the number of windings when winding is performed using a steel strip to which the metal strip processing apparatus of the present invention is applied and a steel strip of a comparative example.

FIG. 17 is a graph showing the taper length and the tendency of lap marks to be generated when the taper-shaped steel strip at the tip of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper shearing machine 2 Lower shearing machine 3 Rolling machine 4 Metal band 5 Winding machine 6 Cutting machine 7 Tip part heater 8 Passing plate table 9 Passing plate guide 11 Upper blade 12 Upper blade 21 Lower blade 30a Upper roll 30b Lower roll

Claims (1)

[Claims] 1. A shearing machine for cutting a longitudinal end portion of a metal strip so that a width of a tip portion thereof is narrower than a width of the metal strip, and a rolling machine for rolling the sheared metal strip tip portion. A metal band processing device characterized in that