JPS6161708A - Method of observing trimming process of steel belt - Google Patents

Abstract

PURPOSE:To prevent inferiority in the width of a steel belt from occurring, by forming an electrical circuit loop including trimming chips which is generated upon side trimming of both widthwise ends of the steel belt so that the trimming process of the steel belt is observed. CONSTITUTION:A steel belt 2 is severed at its both ends by means of side trimmers 4 having upper and lower circular blades, and therefore, continuous trimming chips 6 are generated. Each trimming chip 6 moves along a guide 8, and is held between electrode rolls 10A, 10B and counter rolls 12. The rolls 10A, 10B are connected together through a power source 14 and a relay 16 to establish an electrical circuit loop. The relay 16 is connected to a warning device 18. The generation of the trimming chips 6 which means that the electrical isolation is interrupted, the relay 16 is energized to operate the warning device 18 to alert the stopping of severance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for monitoring steel strip trimming operations, and more particularly to a method that can reliably monitor trimming operations.

The steel strip is cut at both ends with a side trimmer set to the same width as the strip, producing trimming waste and reducing the width of the product. The present invention is utilized for such steel strip cutting operations.

[Conventional technology]

In order to guarantee the product width, measures have been taken to prevent meandering of the copper strip during trimming, but recently, due to increased line speeds and reduced trimming to improve yield, the plate 11 (2) If there is fluctuation or meandering, cutting by the side trimmer is likely to be interrupted or inhibited. If the cutting of the end is interrupted, a defective width portion of the steel strip will occur, and the defective width portion is detected by observing the side of the steel strip, measuring the width of the steel strip, or inspecting the surface. The product may be contaminated with

In order to prevent these width defects, a number of methods have been used to monitor trimming operations. For example, devices that detect the edge of the steel strip using a magnetic method are not reliable because the dimensions and shape of the edge change. The method of monitoring the edge of the steel strip using an optical method has drawbacks such as the difficulty of detecting minute width changes with high precision.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a monitoring method that can reliably perform steel strip trimming operations.

[Means and operations for solving the problems] The gist of the present invention is as follows.

That is, in a method for monitoring steel strip trimming work in which both ends of the width of the steel strip are cut with a side trimmer to generate continuous trimming waste, an energizing loop including the trimming waste is formed, and depending on the energization status of the energizing loop, the This is a method for monitoring steel strip trimming work, which is characterized by monitoring the trimming work.

It is natural that trimming waste is generated when trimming is performed, but conversely, if trimming waste is not generated, the steel strip is not caught in the side trimmer, and therefore trimming is not performed and the width of the steel strip is defective. However, the present invention focuses on whether or not this trimming debris is generated.

The details of the present invention will be explained using the example of FIG.

The steel strip 2 is cut at both ends by side trimmers 4 having upper and lower round blades to generate continuous trimming waste 6, which moves along a guide 8. In the present invention, as shown in FIG.
A,] is held between the OB and the presser roll 12. On the other hand, the two electrode rolls IOA and IOB are the power supply 1
4. Contact including relay 16, power supply 14 - relay 16
- Electrode roll 10A - Trimming waste 6 - Electrode roll 10
B- forms an energizing loop with the power source 14; relay 16
is in communication with the alarm device 18. The trimming waste 6 is held between the electrode roll IOA, 1013 and the presser roll 12, and is in stable contact with these.

In the present invention, as described above, the trimming scraps 6 form a current-carrying loop, so when the trimming work is normally performed, the current is energized, but when the cutting is stopped, the trimming scraps 6 form a current-carrying loop. When the alarm no longer occurs, the energization loop is broken and the energization is cut off, so the alarm device 1 is connected via the relay 16.
8 is activated and warns to stop cutting.

According to the present invention, it is possible to reliably detect the stoppage of cutting from the energization state, regardless of the shape of the trimming waste 6.

In addition, in the above example, the energizing roll 10A110B
Although the trimming scraps 6 are energized to form a current-carrying loop, the trimming scraps may be energized by a blade of a side trimmer, a current-carrying brush, or the like instead of the current-carrying rolls IOA and IOB.

〔Effect of the invention〕

The present invention is designed to reduce the amount of IJ i that occurs when cutting the side trimmer.
To prevent product width defects by forming an energizing loop including trimming debris, and accurately determining normal operation or stoppage of trimming work, regardless of the shape of trimming debris, based on the energization status of the energizing loop, and issuing a warning. was completed.

[Brief explanation of drawings]

FIG. 1 is a front view of a steel strip side trimming device for explaining the present invention.

Claims (1)

[Claims] (1) In a method for monitoring steel strip trimming work in which both ends of the width of the steel strip are cut with a side trimmer to generate continuous trimming scraps, an energizing loop including the trimming scraps is formed and the energizing status of the energizing loop is determined. A method for monitoring steel strip trimming work, comprising monitoring the trimming work.