JP2648650B2 - Strip cutting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a width dimension rejection portion after trimming in a continuous strip manufacturing line, and more particularly, to a method for automatically rejecting a width dimension rejection portion caused by a change in a running width of a trimmer. The present invention relates to a strip cutting method for removing a strip.

[0002]

2. Description of the Related Art Conventionally, the operation of changing the width of a trimmer in a trimming process of a strip has been performed in a state where the progress of the strip is stopped. Accordingly, there was substantially no portion where the width dimension was rejected. However, in recent years, a technique has been developed in which, in order to reduce the time required for changing the width of the trimmer, the width of the strip is not stopped, that is, the width is changed between runs. However, according to this, the width of the trimmer is changed while the strip is in progress,
Since there is a part that deviates from the allowable dimensional accuracy in the section from the start point of the interval change to the end point of the interval change, check this visually or identify the rejected part by actual measurement,
That part had to be removed by a cutting machine such as a shearing device.

[0003]

In order to visually confirm or actually measure a rejected part, the line speed must be reduced, which leads to an increase in handling time.
In addition, since it depends on the operator's sense, the yield is reduced.

[0004] The present invention has been devised to remedy such disadvantages of the prior art, and its main objects are as follows.
An object of the present invention is to provide a strip cutting method capable of improving productivity and yield.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a trimmer for trimming a strip, the width of the trimmer being changed between runs, and the position of the trimmer stand in the width direction being detected to determine the running of the trimmer. By tracking the part on the strip from the start point of the strip width change to the end point of the strip width change, or by tracking the part that does not satisfy the width dimension accuracy tolerance of the strip, the cutting position in the strip traveling direction. Is achieved by providing a strip cutting method characterized by performing the following.

[0006]

In this way, the portion on the strip from the start point of the running width change to the end point of the running width change, or the portion that does not satisfy the allowable range of width accuracy in the same portion, is positioned in the width direction of the trimmer stand. Therefore, if this is tracked and the cutting device is operated in synchronization with the passage of the same portion through the cutting device, only the rejected portion can be automatically removed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

FIG. 1 is a schematic diagram showing the configuration of equipment to which the present invention is applied. This equipment includes a skin path elongation meter 1 and a trimmer device 2 arranged in series along the running direction of a strip 10. , A thickness gauge 3, an online surface roughness meter 4, an online Rankford value measuring device 5, a flaw inspection device 6, a shear device 7, a tracking device 8, and a host computer 9 such as a vidicon or a procon. .
Of these, the skin pass elongation meter 1 must be placed upstream of the thickness gauge 3 and the shear device 7 must be placed at the most downstream side, but the other devices do not necessarily have to follow the order described above. Further, the skin pass elongation meter 1, the thickness gauge 3, the online surface roughness meter 4, the online Rankford value measuring device 5, the flaw inspection device 6, and the like do not necessarily have to be combined in order to carry out the present invention.

The trimmer device 2 is for trimming both side edges of the strip 10 and is composed of a pair of trimmer stands whose positions can be varied in the width direction of the strip 10. The width is changed between the runs in accordance with the distance, and a width direction position detection signal is output to the tracking device 8.

Next, the operation of the present invention will be described with reference to FIG. Here, assuming a case where the narrow material 11 and the wide material 12 are connected and proceeding, as illustrated in FIG. 2A, the narrow material 11 has a material width of 1220 mm. The width of the wide material 12 is 1270 mm, and this is trimmed to finish the product to a width of 1250 mm. When the strip 10 advances in the direction of the arrow A, the running width is changed from the narrow material 11 to the wide material 12, and when the strip 10 advances in the direction of the arrow B, the wide material 12 is changed. Is changed to the narrow material 11 from.

When the strip 10 advances in the direction A, the changing of the running distance of the trimmer device 2 is started at the point C, and the changing of the running distance is completed at the point D. Conversely, strip 10 is B
When the vehicle travels in the direction, the interval change of the trimmer device 2 is started at the point D, and the interval change is completed at the point C. In the drawing, the solid line indicates the contour of the strip 10 before trimming, and the dotted line indicates the contour to trim.

A section E (parts C to D) from the start point of the interval change to the end point of the interval change according to the traveling direction of the strip 10
Tracking device 8 in accordance with the progress of strip 10
, The shear device 7 is driven in synchronization with the passage of the interval E on the strip 10, and the interval E can be automatically cut and removed.

For example, in the case of a passing speed: 80 mpm, a width changing speed: 10 mm / sec, and a changing width dimension: 50 mm, a strip length required for the width changing is 50/10 × 80/60 = 6.7 (m). .

FIG. 2B is a view for explaining the cutting of a portion of the trimmer device 2 according to the present invention, which is out of the allowable range of the width dimension when the running width is changed. Material width 1220mm, product width 1
The allowable range of the product width of the narrow material 11 of 200 mm is 119
8 mm (minimum value) to 1208 mm (maximum value). The product width allowable range of the wide material 12 having a material width of 1270 mm and a product width of 1250 mm is 1248 mm (minimum value) to 1
258 mm (maximum value). In this case, the section K from the point F to the point G is a width dimension rejection portion of the narrow member 11 and the wide member 12.

In the drawing, the thick line indicates the outline of the strip 10 before trimming, the thin line indicates the outline after trimming, and the dotted line indicates the allowable range of the width dimension stored in the host computer 9.

Now, for example, when the strip is traveling in the direction A, the allowable range of the width dimension accuracy of the narrow material 11 based on the information from the host computer 9 in the running distance changing section E in the trimmer device 2. And the range J satisfying the allowable width dimension accuracy of the wide member 12 need not be removed.

Therefore, the interval E of the trimmer device 2 is changed.
The section K which does not satisfy the allowable range of width dimension accuracy based on information from the host computer 9 is tracked by the tracking device 8 and the shearing device 7 is driven at the points F and G, so that the width dimension rejection section K Only one can be removed.

When the rejection section K is calculated under the same conditions as above, it becomes 40/10 × 80/60 = 5.3 (m), and the removed portion decreases from the E section to the K section,
It can be seen that the yield drop due to the width dimension rejection can be reduced as compared with the 6.7 m of the inter-run width change section E.

[0019]

As described above, according to the present invention, it is possible to cut off a rejected portion at a passing speed of 100 mpm by tracking the start point and the end point. , Greatly improve productivity. Moreover, since only the width dimension rejection part can be removed,
The yield is improved. Further, strips of higher quality can be manufactured at low cost by combining with other quality measuring devices.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 relates to cutting of a portion where a trimmer changes a running distance .
It is explanatory drawing, (a) is a relationship between a raw material dimension and a finishing dimension.
And (b) shows the permissible range of the trimmer in the change-over section.
The relationship between the off-dimensions and the shear-cut parts
Show.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Skin pass elongation rate meter 2 Trimmer device 3 Thickness meter 4 Online surface roughness meter 5 Online Rankford value measuring device 6 Flaw inspection device 7 Shear device 8 Tracking device 9 Host computer 10 Strip 11 Narrow material 12 Wide material

Claims (2)

(57) [Claims] The present invention relates to a method for changing the width of a trimmer for trimming a strip during a run, detecting a position in a width direction of a trimmer stand, and starting a change in a width of a trimmer from a start of a run of the trimmer to an end of a run. A strip cutting method characterized by specifying a cutting position in a traveling direction of a strip by tracking an upper portion. 2. A width change of a trimmer for trimming a strip is performed during a run, a position in a width direction of a trimmer stand is detected, and a portion which does not satisfy an allowable width dimension accuracy of a strip obtained from the detected value is detected. A strip cutting method characterized by specifying a cutting position in a traveling direction of a strip by tracking.