JPS609613A - Side trimming apparatus - Google Patents

Abstract

PURPOSE:To improve the operation rate of a trimmer by horizontally turning the cutter knives and knife shafts, having the center of symmetry of two pairs of cutter knives as a center shaft in turning. CONSTITUTION:As for a rotary type side trimmer 3 equipped with the upper and the lower rotary disc type cutter knives 1 and 1' and another pair of preparatory cutter knives 101 and 101', said cutter knives and knife shafts 2 and 2' are turned horizontally around a turning axis line, having the center of symmetry of two pairs of cutter knives as a center shaft in the knives and knife shafts turning, and the traveling interval is varied by transferring horizontally in the direction 11 of plate width, and replacement of the cutter knives 1 and 1' and variation of traveling interval can be carried-out by a same mechanism, and the axis center of the cutter knife revolves and transfers in succession during the traveling-interval varying period, keeping a nearly right angle for the cutting line, and smooth cutting is performed, and thus the operation rate is improved.

Description

[Detailed Description of the Invention] The present invention provides equipment (hereinafter referred to as
It's called a line. ) relates to a side trimming device.

In general, pickling lines and other equipment for surface-treating rolled sheets of strips continuously cut both ends of the sheets using a side trimmer, usually equipped with a single-rotation cutter knife, to produce products of a predetermined size and width. ing. The above-mentioned processed plate materials are usually wound into coils for each rolling lot, and since it is necessary to process coils of various sizes continuously according to the production schedule, the preceding processed coil and the subsequent coil are joined at line E. Continuous processing. and.

Conventionally, when side trimming coils with different plate width dimensions, as shown in FIG. The cutter knives 1 and 1' of the side trimmer cut the following strip plate 11 into an arc shape as shown by the chain double-dashed line using a side clipping shear (not shown) so that the cutting values of the following strip plate 11 can be set to 1ir and in'. After chipping, send it to the side trimmer.

At this point, the line was stopped again, the cutter knife 1°1' was moved in the direction of the arrow VX to a position an' where trimming of the following strip plate 11 could be started, and the operation was restarted.

However, in recent years, processing lines, etc. are trying to increase the line speed as much as possible in order to improve productivity, and this has resulted in the problem of line stoppage time due to clipping work and positioning of the cutter knife of the side trimmer. It becomes. Therefore, a method for side trimming in response to changes in board width without stopping line operation, that is, a method for changing the running width, was developed.One example of such a method is one that does not use a clipping shear. , the line speed Vv is lowered at an appropriate position before the joint of the coil enters the trimmer, and the subsequent strip plate is trimmed while moving the cutter knife 1.1' of the side trimmer horizontally in the width direction of the plate at a predetermined speed. This system is designed to be set at the center of rotation of the upper and lower cutter knives 1, 1', which improves productivity by increasing the operating rate of the line and reduces equipment costs by omitting the clipping device. The line speed Vy and the cutter knives 1, 1' must be adjusted in order to maintain cutting performance because the cutter knives 1, 1' move horizontally at a constant angle approximately perpendicular to the line center line 2. There is a limit to the horizontal movement speed VX, and in particular, the line speed Yy needs to be considerably lower than a predetermined value. In addition, cutter knife 1. Bi's horizontal movement speed VX is low.

It takes an extra amount of time to complete the width change, and the length of the strip running during this time increases in proportion to this time. In this case, the strips in between are scrapped due to the difference in width.

Both of these are major factors that reduce productivity, such as lowering yield (note that 4 is a cutter knife drive device, and 6 is a head.

Reference numeral 8 indicates a moving device, and reference numeral 9 indicates a guide. ).

As another example, as filed in Japanese Patent Laid-Open No. 50-144978, the housing is rotated around the vertical extension line of the cutting point of a shearing blade (cutter knife) to maintain balance during running. There is a method to implement this method, but in this case, the so-called turret type side trimmer equipped with two pairs of cutter knives, which is the subject of the present invention, further requires a housing rotation mechanism necessary for changing the blades.

The structure becomes extremely complicated and is not suitable for practical use.

The present invention has been proposed to solve such conventional problems, and is a rotary (turret type) side trimmer comprising a pair of upper and lower rotating disk two cutter knives and another pair of spare cutter knives. In this method, the cutter knife and the knife shaft are horizontally turned around the turning axis with the symmetry center of the two pairs of cutter knives as the turning center axis, and the running width is changed without being horizontally moved in the sheet width direction. It is a thing.

It is an object of the present invention to provide a side trimming device which enables the exchange of a cutter knife and the maintenance during running by the same mechanism, increases the operating rate of the device, and has a good yield.

Hereinafter, two side trimming devices according to the present invention will be described in detail with reference to FIGS. 2 to 4 (the same members as those in the conventional device will be described with the same reference numerals).

2 and 3 are a plan view and a front view showing the schematic configuration of the side trimmer according to the present invention, and FIG. 4 is a schematic explanatory diagram showing the movement locus of the cutter knife in the present invention. Rotating disc type cutter knives 1, 1' are attached to the side trimmer body 3 via knife widths 2, 2'. Similarly, spare cutter knives 101 and 101' are fixed to the side trimmer body 3 via knife shafts 102 and 102', and each pair of cutter knives is arranged symmetrically with respect to the zero point.

Here, the cutter knife is divided into the so-called drive cut method, which is driven by a motor, and the pull cut method, which is not driven (A. The Purukalami method is not equipped with these drive devices 4, 4', and the tension device 5 (not shown), which pulls the strip, uses the cutter knife 1.1' and the cutter shaft 2.1 to generate the power for cutting the strip. It is a rotary drive device equipped with, for example, a gear mechanism, and is configured so that the side trimmer main body 3, on which the side trimmer body 2' is integrally attached, can be freely rotated forward and backward in the horizontal direction around the axis 0, and is attached to the bed 6. The bed 6 is configured to be horizontally movable in the width direction of the processed plate 'lO, +1 along a guide 9 provided on the base 7 via a moving device 8 etc. fixed to the base 7. In the figure, a cylinder is used as the moving device 8, but in other cases, a configuration in which the moving device 8 is moved by an electric motor via a screw or a nut is also applied. Note that 2 is the direction of movement of the plate material, Side trimmers are provided oppositely on both sides of the line center X, but in the present invention, the trimmers on one side are omitted.

When performing side trimming using the side trimmer configured as described above, first, the running width is changed as shown in FIG. 4. That is, the strip plates io, t of the front and rear coils
An arbitrary position a1 on the cutting line 18 of the preceding plate material 10 before the joint 12 at point i reaches the cutter knives 1, 1', and an arbitrary position 1if, a on the cutting line 14-F of the succeeding plate material 11.
. Along a smooth arbitrary curve 15 that is in contact with each of
In addition, the upper and lower cutter knife axes 2a, 2a' are always placed at each cutting point (a) so that they are approximately perpendicular to the tangent to the curve 15.
Kaffuna 4 F1, moving as l, a2...an
Continuous cutting is carried out by horizontally moving the first cutting knife shafts 2, 2' around the axis 0 in the width direction of the cutting board.

In this case, cutting can be performed by the above operation by appropriately controlling the horizontal rotation speed W and horizontal movement speed Vx of the cutter knives 1 and 1' with respect to the line speed Vy.

In other words, a pair of upper and lower cutter knives 1, 1 of the side trimmer
By installing a rotary drive device 5 that can horizontally turn the rotating shafts 2 and 2' of the knives and the knife around the same vertical axis O, and a moving device 8 that can move horizontally, it is possible to change the width between runs and cutter knife 1. , 1' can be smoothly trimmed by controlling the rotation angle and horizontal movement speed so that the axes of the cutting points are substantially perpendicular to the tangent to the traveling cutting curve at the cutting point.

As described above in detail with reference to the embodiment shown in the drawings, according to the side trimming device according to the present invention,
During the period of changing the running width, the axis of the cutter knife always remains almost perpendicular to the cutting line and rotates gradually to perform smooth cutting, which greatly extends the life of the cutter knife. The horizontal speed and line speed during width changes can be significantly increased. Therefore 1
According to the present invention, the operating rate is improved compared to the conventional method of changing the running width, and the amount of scrap at the coil joint can be reduced. 9 Yield is improved, resulting in highly productive equipment. play.

Furthermore, by rotating the side trimmer body 180 degrees around the rotation center 0 of the side trimmer body 8 and replacing the cutter knife 1.1' with the M cutter knife 101, 101', the knife can be quickly replaced. It can be executed without complicating the structure.

In addition, according to the present invention, the case where the width of the preceding plate material is larger than the width of the succeeding plate material has been described in detail.

In the case of the opposite joining state, the above procedure can be carried out except that the horizontal rotation and horizontal movement directions of the cutter knife and knife shaft are opposite to those in the illustrated case.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a conventional side trimmer. FIG. 2 is a plan view showing a schematic configuration of the →noid trimmer according to the present invention, FIG. 8 is a front view of FIG. 2, and FIG. 4 is a schematic explanatory diagram showing the movement locus of the cutter knife in the present invention. 1.1' is a cutter knife, 2.2' is a knife shaft. 8 is a side trimmer main body, 4.4' is a cutter knife drive device, and 5 is a side trimmer main body rotation drive device. 6 is a bed, 7 is a base, 8 is a moving device, 9 is a guide,
10. 11 is a strip plate material, 12 is a joint. Figure 4

Claims (1)

[Claims] Rotary type (turret type) equipped with a pair of upper and lower rotating disc type cutter knives and another pair of spare cutter knives
In the side trimmer, the cutter knife and the knife shaft are horizontally turned around the turning axis with the center of symmetry of the two pairs of cutter knives as the turning center axis, and while changing the running width without moving horizontally in the width direction of the plate. A side trimming device characterized by being configured to perform continuous cutting.