JPS6328593A - Partial trimming method by side trimmer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a partial trimming method using a side trimmer installed in a process line such as a continuous pickling line, a cold rolling facility, etc.

[Conventional technology]

Conventionally, when producing a strip-shaped steel plate (hereinafter referred to as "strip steel") using a hot rolling mill, the width of the strip is set to a predetermined width over its entire length due to the mechanical performance of the hot rolling mill and the level of production technology. It is made slightly wider. Therefore, in order to finish such a steel strip to a predetermined width, side trimming is performed in which both ends of the steel strip are continuously cut using a side trimmer.

However, due to improvements in hot rolling mills and production technology in recent years, some steel strips have become so long that side trimming is no longer necessary for most of the entire length, except for the tip and rear end.

Side trimming for this kind of steel strip.

This means that only a few tens of meters from the front and rear ends of the strip in the longitudinal direction are required, but when performing partial trimming in which side trimming is started midway, conventional cutting methods have the disadvantage that the cutting cannot be done well. As is clear from Fig. 4 and Fig. 5 showing its details, at the 9-part trimming start point A, the cutting surface (cutting line) of the side trimmer blades (1) (1)' and the strip steel (2) Since the angle α formed by the end face of is very small, the biggest cause is that the end face of the steel strip bends.

[Problem that the invention seeks to solve]

The present invention aims to provide a partial trimming method using a side trimmer that can reliably perform partial trimming, since partial trimming is impossible or incomplete with conventional side I-'J machines and methods of using the same, as described above. It is something.

[Means for solving problems]

The present invention is based on patent application No. 58-11930 previously filed by the applicant.
Using the side trimmer that can be adjusted between runs as disclosed in 8,
Rotate the cutter horizontally along with the housing as if doing a running thread, and move it in the width direction so that the cutting line of the cutter forms an angle with the end face of the strip at the starting point for two-part trimming so that it can make a cut. The cut is started, and after a short period of time, side trimming is performed to a predetermined width.

[Effect]

Since the partial trimming method of the present invention performs side trimming as described above, the angle formed by the cutting surface of the side L-pick blade and the end surface of the steel strip can be cut at the starting point of two partial trimming, and the partial trimming can be carried out smoothly. It can be performed.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

Figure 1 shows a side trimmer (A
), cut the steel strip αC1, (11) along the cutting line α [with] αG
It is a top view which shows the state where mountain number trimming is carried out continuously along C14). For details, the side trimmer (A) is integrated with the housing (3) and the cutter (1), (1F'
can be turned around the O' point by a drive device (5), and can be moved in the width direction by a moving device (8).

To trim the steel strip during running using such a side trimmer (A), move the housing (3) (B) as shown in Drawing 2.
At the same time, the strip is rotated at a speed of
) by appropriately controlling the blade axis (2),
(2)' axis (2a), (2a') is (ax),
(a2), (a3).

At each position of (a4), ... (a・), the cutting line α is always approximately
3. I try to make it perpendicular to Q5゜α beauty. (In the drawing, the side trimmer (A) is depicted as moving in the longitudinal direction of the steel strip for convenience of illustration, but it goes without saying that the steel strip actually moves.) The side trimmer (A) is placed symmetrically to the center line of the steel, and only one side of the side trimmer (A) is shown in the figure. A partial trimming method of the present invention for partially trimming a steel strip using such a side trimmer (A) is shown in FIGS. 2 and 3.

(In both figures, parts that are the same as in Figure 1 are given the same numbers.

) In Figure 2, the strip QO runs in two directions (
Up to position a2), the slope width is almost uniform and side trimming is not necessary, but after that the board width becomes wider and partial trimming is required. In this case, assuming that the blades (1) and (1)' of the side trimmer GA) are kept in standby at the position (al), and that the side trimmer is used to perform temporary empty ridge numbering, this width change amount is the maximum. value (H2), final value (H+
) Create a program so that K is achieved. one side)
Continuously measure the width of the steel strip using a measuring device αQ such as a linear sensor at a distance (S2) away from the IJ ma (A) on the entry side, and then find the point (a2) where you want to start two-part trimming.
) is detected.

Here, as mentioned above, the mountain number locus of the temporary sky to be executed by the side trimmer (A) is assumed in advance, so the initial mountain number amount is (
The distance (81) that the steel strip travels at 1 when reaching Hl) is known. Therefore, the point (a2) at which you want to start partial trimming of the steel strip is the waiting side trimmer blade position (al).
The knife is (al), (a2), (
A3) and the thread count are performed, and the strip is cut from (a2) and (
Continue trimming with the required board width in step a3). What is important here is that at point (a2) the cutter starts cutting at an angle of θ with respect to the end face of the steel strip. If the cutting tool does not rotate and the end face of the cutting tool makes a cut parallel to the direction of travel, the cutting angle will be α, which is very small compared to the normal cutting angle, and the cutting will not be made properly as described above.

However, if an appropriate turning angle is given to the cutting tool by the running thread number, θ becomes larger than α and becomes an angle that allows cutting. As described above, partial trimming with the side trimmer (A) is possible, but in this case, the steel strip travels only S3 before the cutter continues trimming with a predetermined strip width, and the strip width during this period is kept at the predetermined strip width. Since it is narrower by 2 (H2Hl), it is not a finished product. Although the S3 has only a small amount of lateral control.

As a way to avoid this, partial trimming as shown in FIG. 3 can be considered. In the case of Fig. 3, the cutting start position (a'
2) is located on the entry side of point (a2) in FIG. 2, and the board width at this position is slightly wider than the predetermined board width at point (a2). If you start cutting at such a position (a'2), the temporary empty mountain number cutting lines can be set to (a, ), (a'2), (a3) (execute width change times). control), as shown in Figure 2-
There is no need to cut it narrower than the specified width. However, in this case, a maximum uncut portion (b) occurs over the length (S3) of the steel strip. Control in this case may be performed in the same manner as in FIG. 2.

〔Effect of the invention〕

As specifically explained above, according to the partial trimming method of the present invention, it is possible to reliably perform partial trimming of a steel strip, which was conventionally impossible or uncertain, and it can greatly contribute to improving production volume. can.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state in which the side trimmer used in the present invention is performing side trimming during running to change the board width during running. FIG. 2 is an explanatory diagram of partial trimming according to the present invention. FIG. 3 is an explanatory diagram showing another embodiment of partial trimming according to the present invention, and FIGS. 4 and 5 are explanatory diagrams in the case where partial trimming is performed using a conventional side trimmer. A...Running side trimmer, 1.1'...Knife. 3...Housing, 5...Housing rotation device, 8
...Housing moving device, θ...Strip steel cutting angle, 1
0゜11...Strip steel

Claims (1)

[Claims] In partial side trimming of both ends of the steel strip in the width direction, a side trimmer that can horizontally rotate the cutter along with the housing and move in the direction of the strip is used.
A partial trimming method using a side trimmer, characterized in that cutting is started so that the cutting line of the blade forms an angle that allows cutting to the end face of the steel band, and after a short period of time, side trimming is performed to a predetermined width.