LU83049A1 - INSTALLATION FOR CHECKING THE GEOMETRY OF LAMINATED PRODUCTS - Google Patents

Description

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Installation for checking the geometry of laminated products.

The present invention relates to an installation for the continuous control of the geometry of rolled products.

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The rolling mill trains designed for the rolling of products in large quantities and which. may have complex profiles, such as, for example, beams for beams or sheet-board rolling, have control stations used to determine whether the geometry of the rolled product conforms to standards.

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If not, it is decided whether it is possible to resort to corrective measures or whether the non-conforming product should be definitively rejected. In the event that a correction is likely to lead to subsequent acceptance of the product, the type of correction to be made is determined, the product is marked accordingly and directed to the appropriate station where the corrective action is taken.

To ensure that current production takes place in a rational manner, it is necessary to have the measurement results quickly on one side in order to know at any time the quantity of profiles corresponding to the standards in order to avoid over-production or underproduction and on the other hand to be able to react quickly in the event of the appearance of a systematic imperfection.

The object of the present invention was to provide a device allowing the geometry of even complex profiles to be checked quickly and during rolling, so as to be able to intervene effectively in the manufacturing process.

This object is: achieved by the device according to the invention which comprises in particular a measurement unit, an evaluation unit and a communication unit between the measurement process and the operator 35 the three units being linked together and which is characterized in that a source of rays with a pronounced penetrating power fr - 2 - (1) forms the end of an extensible support (1,1), than several sensors (1,2; 1,3; 1, 4) are fixed by means of extendable supports to a ring (1.5) which can rotate about its axis, the supports being able to perform a rotational movement, in addition to the translation and that the source and the sensors are arranged in a plane essentially perpendicular to the axis of a profile in the process of rolling and around it.

According to the invention, each support comprises an individual remote control which regulates its position, either by a combined movement of translation and rotation, or by a movement only of translation resp. of rotation. It is obvious that a similar control is provided to place the ring (1,5) in the desired position.

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Thus it is possible to carry out practically any position of at least one sensor with respect to the source and with respect to the profile, so that it is possible to make significant measurements at critical locations.

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The source of penetrating radiation can be, for example, a radioactive source or an X-ray source. In both cases, protective measures are obviously necessary.

The results of the measurements provide information relating either to the section of the product (thicknesses, heights, widths, section, symmetry), or to the degree of linear regularity following a predetermined trace.

30 The information collected by the measurement sensors is reconstituted in evaluation electronics and used to check the section, dimensions or defects of the product. Likewise it becomes possible to calculate the metric weight resp. the total weight of the rolled product. These measured and calculated quantities 35 are compared with those of a reference product and any variation in relation to this is signaled to the operator and / or introduced into the dynamic regulation circuit of the rolling mill train.

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As appears from the drawing which shows in a nonlimiting manner the diagram of a possible embodiment of the device according to the invention, the latter consists of the following three functional groups: 5 The measuring head (1) of the product to analyze; evaluation electronics (2) based on microprocessor and unit (3) for communication with the process and the operator.

In detail the measuring head comprises a source (1,0) radioactive or 10 X-rays with rotational or translational movement (1,1), three detectors or sensors (1,2; 1,3; 1,4) held by a rotating support, each detector can undergo an additional translational movement. Source (1,0) and detectors (1,2; 1,3; 1,4) are usefully secured to a frame not shown and can be synchronized in their respective movements, in order to allow the section scanning mode ( P product stopped) or the linear and combined scanning mode (P product in motion). Shielding must be provided to provide adequate protection.

The measurement signals (X) are transmitted to the evaluation unit (2).

20 This can also receive the following signals: train speed (1,8), product temperature (1,9), product length (1,10).

After purification (2,1) these signals are processed by the micro-system (2,2) equipped with the usual dialogue and editing means (2,3).

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The microsystem (2,2) therefore calculates the dimensions, the section, the extent of the defects, the symmetry, the metric weight and the total weight of the product inspected. Any deviation from the reference is signaled to the operator, recorded and if necessary introduced into the dynamic control loop * 30 of the train.

Claims (3)

1. Installation for continuously monitoring the geometry of rolled products, which in particular comprises a measurement unit (1), an evaluation unit (2) and a communication unit (3) between the measurement process and the operator, the three units being interconnected and which is characterized in that a source (1,0) of rays with pronounced penetration power forms the end of an extensible support (1,1), that several sensors * 10 (1,2; 1,3; 1,4) are fixed by means of ex tensile supports to a ring (1,5) which can rotate around its axis, the supports being able to perform a rotational movement in addition of the translation, and that the source and the sensors are arranged in a plane essentially perpendicular to the axis 15 of a profile in rolling process and around it. 2. Installation according to claim 1, characterized in that each support comprises an individual remote control, which regulates its position, either by a combined movement of rotation and rotation, or by a movement only in translation resp. of rotation. 3. Installation according to claims 1 and 2, characterized in that the ring (1,5) comprises a remote control which adjusts its position by a rotational movement. * *