JPH06179112A - Strip treatment line with flying shear provided with angle edges - Google Patents

Abstract

PURPOSE:To enable cutting of a strip during the running by mounting an angle edge on a flying shear. CONSTITUTION:In a line in which painted steel plates are produced by making painting, curing, cutting, etc., between a payoff reel 17 and a tension reel 33, a flying shear 30 with a pair of upper and lower angle edges is provided for cutting, and the top end of a strip 16 is cut in angle shape during the running to improve the winding of it on the tension reel 33. Because a drive shaft for driving the upper and lower edges of the flying shear 30 is coupled to a crankshaft through a coupling which enables alignment of their phases, interference and clearance between the upper and lower edges can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flying shear for cutting a steel plate or the like (hereinafter referred to as "strip") so that its tip has a mountain shape during traveling, and more specifically, a strip equipped with this flying shear. The present invention relates to a surface treatment line.

[0002]

2. Description of the Related Art Generally, in order to produce a coated steel sheet, a strip of an original sheet is chemically treated while running,
Paint is applied and heated to cure. Therefore,
The production line is, for example, as shown in FIG. That is, the strip consists of an uncoiler, a joining by a joiner, an accumulator on the inlet side consisting of a looper, a coating device, a heating furnace, an accumulator on the outlet side consisting of a looper, a cutting by a shear, and a tension reel. Painted steel sheets are continuously produced in the order of coiler (automatic winding).

By the way, a flying shear is usually
A rotating drum type, a crank swing type, and a rotating crank type flying shear are used, and when cutting the strip in any of the flying shears, the strip speed at the moment of cutting and the shear of the shear are used. A straight blade was used for the shear because it is necessary to synchronize the blade speed.

A belt wrapper is used to automatically wind a coated strip by a tension reel. However, if the strip is a wide material, it is sure that the plate tip is not mountain-shaped. There is a problem that it cannot be rolled up.

Therefore, if the straight blade of the conventional flying shear is changed to a chevron blade to cut the tip of the strip into a chevron shape, for example, in the case of the crank swing type flying shear, the chevron blade is a chevron blade. A large swing angle is required for the crankshaft, and the strip speed and the cutting edge speed are not synchronized. Therefore, in the conventional apparatus, when cutting the tip of the strip into a mountain shape in the strip production line, there is a problem that the strip is temporarily stopped and then cut during the operation of the line. Therefore, there is a problem that an accumulator composed of a looper is required.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the gist of the present invention is as follows: 1) A processing device for surface-treating a strip between an uncoiler and a coiler. Is provided, a flying shear is provided between the coiler and the processing device, and the coiler is constituted by a tension reel with a belt wrapper, and the flying shear is provided.
In a strip surface treatment line composed of a pair of upper and lower chevron blades, the flying shear is moved in a perfect circle by an eccentric mechanism that is rotated by a series of gear mechanisms,
And, the gate frame to which the mountain-shaped upper blade is attached and the slide groove provided in the up-down direction facing the gate frame are used for the regulation, and the mountain-shaped lower blade is attached to the gate frame. The lower blade holder, a crankshaft that vertically operates a connecting rod connected to the lower blade holder, and a drive shaft that rotationally drives the gear mechanism, and the crankshaft and the drive shaft. And a shaft coupling that enables phase matching of the above, and a strip processing line equipped with a flying shear having a chevron blade, characterized in that
A strip processing line provided with a flying shear having a chevron blade of 1), wherein the shaft joint is a flange type fixed shaft joint.

[0007]

Embodiments of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the arrows a to a of FIG. 1, FIG. 3 is a view showing a chevron blade, and FIG.
[Fig. 3] is a coated steel plate production line diagram to which this embodiment is applied.

The flying shear of this embodiment is suitable for a coated steel plate production line, but can also be applied to a colored zinc iron plate, a vinyl chloride coated steel plate or the like production line.

In FIGS. 1 to 3, reference numeral 1 denotes a U-shaped base frame of the flying shear A when viewed from the front, and a gear mechanism in which a series of gears are engaged is built into both side frames. In this gear mechanism, the gears 3 and 3a are gears having the same diameter and the same number of teeth, and the gears 2 and 2 attached to the drive shaft 12B.
The number of teeth is larger than that of a, and 4 and 4a are idler gears. Crankshafts 6 and 6a are connected to shafts 5 and 5a to which these gears 3 and 3a are fixed.

The crankshafts 6 and 6a support a gate frame 7 provided in the base frame 1 and having an inverted U-shape in a front view. Therefore, the crankshaft 6,
When 6a is rotated, the horizontal portion 7a of the gate frame 7 is vertically and forward and backward (in FIG. 1, while maintaining a horizontal posture).
It means to move in parallel to the direction orthogonal to the paper surface).

Reference numeral 8 is an upper blade attached to the gate frame 7, and is an angled blade as shown in FIG. 3 (A) and its side view (B).

Reference numeral 9 denotes a lower blade provided so as to face the upper blade 8 and has a chevron shape as shown in FIG. This lower blade 9
Is attached to the lower blade holder 10, and both ends of the lower blade holder 10 are fitted in opposed vertical slide grooves 11, 11 provided in the gate frame 7.

Reference numeral 12B is a drive shaft for driving the gears 2 and 2a, and is connected to the crankshaft 12A through a flange type fixed shaft joint B. Two eccentric parts 13, 13 are provided in the middle part of the crankshaft 12A. A base portion of a connecting rod 14 is connected to the eccentric portions 13. The tip of the connecting rod 14 is the lower blade holder 10
Are linked to.

Reference numeral 15 is a motor for rotating the drive shaft 12B, which is provided with a controller (not shown) for changing the angular velocity of the drive shaft 12B.

The flying shear A is provided in the following coated steel plate production line. That is, in FIG. 4, 16 is a strip, which is wound around the payoff reel 17. 18 is a deflation pinch roll, 19 is a pinch roll, 20 is a shear, 21
Is a joiner, 22 is a first bridle roll, 28 is a waxer, 29 is a flaw inspection machine, and 30 is a flying shear A of this embodiment.

Reference numeral 31 is a scrap winder, 32 is a scrap winder belt wrapper, 33 is a tension reel, and 34 is a tension reel belt wrapper. Incidentally, the accumulators (loopers) on the inlet side and the outlet side, which are conventionally provided, are omitted.

Next, the operation of this embodiment will be described. In FIG. 1, when the motor 15 is operated, this rotational force is applied to the gear 2
→ Gear 3 → Idler gear 4 → Gear 3 is transmitted, and again
Gear 2a via drive shaft 12B and crankshaft 12A
→ Gear 3a → Idler gear 4a → Gear 3a
The rotation of the gears 3 and 3a causes the crankshafts 6 and 6a to rotate, and the gate frame 7 to which the mountain-shaped upper blade 8 is attached translates vertically and forward and backward while keeping the horizontal portion 7a horizontal. . That is, a perfect circular motion is performed. Therefore, the upper blade 8 also makes a perfect circular motion. On the other hand, the lower blade holder 10 to which the mountain-shaped lower blade 9 is attached is a gate frame that moves in a perfect circle.
Since the crankshaft 12A is moved up and down by the connecting rod 14 while being regulated by the frame 7, these movements are combined to move in a wavy trajectory. Therefore, the upper blade 8 and the lower blade 9 are orthogonal to the strip 16 because the upper blade 8 makes a perfect circular motion, unlike the lower blade, which has a horizontally elongated elliptical motion of a general crank swing type flying shear. While cutting, the crank angle formed by the connecting rod 14 is small, and as a result, even if the upper and lower blades 8 and 9 have a mountain shape, they can be synchronized at the time of cutting, so it is necessary to temporarily stop the strip 16. Absent. Therefore, it is not necessary to provide a conventional accumulator (looper) on the output side.

Then, the gate frame 7 and the crankshaft 1
Even if there is a twist on both sides of 2A (operating side and drive side), gears 2, 2a, 3, 3a, idler gear 4,
Even if there is a backlash in 4a, the fixing position of the reamer bolt of the flange type fixed shaft coupling B is set in the circumferential direction in advance and the phases are aligned to prevent interference between the upper and lower blades 8 and 9. Blade clearance can be adjusted. The flange type fixed shaft coupling B may be provided on only one end of the crankshaft 12A.

If the scrap winder 31 is provided on the output side, the accumulator on the input side is also unnecessary. That is, at the start of the operation, the strip 16 on the inlet side is stopped due to joining, so that the strip 16 in the furnace 25 is stopped.
Is over-burned and becomes scrap, which can be removed by winding it with a scrap winder 31 on the output side. Therefore, the accumulator on the entry side is unnecessary.

[0020]

According to the present invention, the tip of the strip is formed in the shape of a mountain and can be wound up well on a tension reel with a belt trumpet, and of course, the upper blade of the flying shear is formed into a perfect circle. Since the lower blade is made to move and the lower blade is made to make a wavy shape, it is possible to synchronously cut into a mountain shape without stopping the strip. As a result, the productivity is increased and the strip surface treatment line does not require an accumulator on the outlet side. Also, since a shaft coupling that allows phase adjustment is interposed on the drive shaft, it is possible to adjust the interference and blade clearance of the upper and lower chevron blades by setting in advance and performing phase adjustment. .

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line aa of FIG.

FIG. 3 is a view showing a chevron blade.

FIG. 4 is a production line diagram of a coated steel sheet to which this embodiment is applied.

FIG. 5 is a flowchart of a general strip surface treatment line.

[Explanation of symbols]

6, 6a ... crankshaft, 7 ... gate frame, 8 ... upper blade, 9 ... lower blade, 10 ... lower blade holder, 11 ... slide groove,
12A ... Crankshaft, 12B ... Drive shaft, 14 ... Connecting rod, 16 ... Strip, 17 ... Payoff reel, 33 ...
Tension reel, 34 ... Tension reel belt wrapper, A ... Flying shear, B ... Flange type fixed shaft coupling

Claims (2)

[Claims] 1. A processing device for surface-treating a strip is provided between an uncoiler and a coiler, a flying shear is provided between the coiler and the processing device, and the coiler is provided with a tension reel with a belt wrapper. In a strip surface treatment line in which the blade of the flying shear is composed of a pair of upper and lower chevron blades, the flying shear is formed into a perfect circle by an eccentric mechanism that is rotated by a series of gear mechanisms. A mover that has the mountain-shaped upper blade attached
A toe frame, a lower blade holder that is regulated by a slide groove provided in the up-down direction facing the gate frame, and to which the mountain-shaped lower blade is attached, and is connected to the lower blade holder. And a shaft coupling that connects a crankshaft that operates the connecting rod in the vertical direction and a drive shaft that rotationally drives the gear mechanism, and that enables phase matching between the crankshaft and the drive shaft. A strip processing line equipped with a flying shear having a chevron blade. 2. A strip processing line provided with a flying shear having chevron blades according to claim 1, wherein the shaft coupling is a flange type fixed shaft coupling.