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Nuevo método de medición sin contacto de dimensiones exteriores de secciones transversales de barras metálicas

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOCZ20150805002
Publicado:
18/08/2015
Caducidad:
17/08/2016
Resumen:
Una universidad técnica checa ha desarrollado un nuevo método de medición sin contacto de las dimensiones exteriores de secciones transversales de barras metálicas durante la producción cuando el objeto está en movimiento y la temperatura de la superficie es superior a 1.000 ºC. Esta tecnología también incluye un marco modular para la implementación sencilla de este método de medida en función de los requisitos del cliente. La universidad busca socios comerciales interesados en vender la tecnología y establecer acuerdos de joint venture y licencia.

Details

Tittle:
A new method of non-contact measuring of outer dimensions of cross sections of metallurgical bar stock
Summary:
A Czech technical university developed a new method of non-contact measuring of outer dimensions of cross sections of metallurgical bar stock typically even during production when measured object is moving and its surface has temperature over 1000°C. Furthermore, this technology includes the highly modular frame allowing easy implementation of this measuring method in many variations based on customers´ requirements. The university is looking for commercial partners.
Description:
Czech technical university developed a new method of non-contact measuring of outer dimensions of cross sections of metallurgical bar stock. During the production of hot-rolled seamless steel tubes, diameter and ovality are monitored continually along the whole length of tubes; moreover, possible surface defects are detected, which may also indicate a defect of the rolling mill. Tubes need to be measured as soon as possible, ideally immediately after the rolling mill during their production, so that any defects may be corrected in due time and thus the loss of material and power may be minimized. This also requires measuring of hot tubes with temperatures designed for their forming (approximately 1.000 °C). In order to indicate correctly the cause of a defect, operators or inspectors need detailed data of the tube and a tool which would allow them a detailed analysis of the ascertained deformation. It is also often required that these data be stored (at least throughout the warranty period) for the purposes of long-term production analysis or as a support means in case of claim procedures.
Offered technology provides method of continuous non-contact measuring of outer dimensions of cross sections of metallurgical bar stock and would allow reliable measuring of required parameters even in the case when the measured material moves or vibrates vertically during measuring. The technical solution is following:
- at least three laser beams rotating in the same direction or oscillating laser beams of commonly calibrated and synchronized scanners evenly surround bar stock so that the centres of the beams are aimed at the axis of the bar stock repeatedly measuring the distance between the beginning of the coordinate systems of scanners and the surface of the scanned bar stock;
- then the group of simultaneously measured distances is converted to point coordinates of the common coordinate system;
- using the groups of the common coordinate system, diameters and centres of gravity of the cross section of the bar stock in the scanning plane are calculated;
- based on approximation of changes of the centres of gravity of the bar stock in time, at least one function of the cross movement is determined during profile scanning and using the function/s of the cross movement of the bar stock during one beam deflecting cycle the coordinates are converted of the measured points of the corresponding profile to eliminate the cross movement and offsetting of bar stock during one scanning sequence in order to obtain the actual profile of bar stock.
Another significant characteristic of the solution is the design of the modular frame by which the required position of individual scanners is secured when measuring the required parameters. The basis of the modular frame fitted with at least one scanner and wiring according to the invention consists in it having a polygonal shape with vertexes formed by at least one connecting elbow and at least two anchoring elbows, whereas these connecting elbows and anchoring elbows are connected by connecting arms and these arms are fitted (using sleeve fixtures) with protective cases for the scanners and the modular frame carries a distribution system for at least one cooling medium.
The university is looking for commercial partners interested in sale of the unique technology and offers joint venture agreement and license agreement.
Advantages and Innovations:
The main advantage of this invention is the ability of detailed measuring of external dimensions of cross sections and even ovality of bar stock along its length and detailed scanning of the whole surface allowing revealing of various surface defects directly on the production line during transporting or rolling of bar stock in hot conditions (up to 2400 °C), and vibration of bar stock.
A very significant advantage is the ability to measure safely bar stock, which oscillates during its movement in cross directions provided that the oscillation frequency is not greater than one half of the frequency of scanner laser beam steering and the deviation does not exceed the scanned field of the scanners. At the same time the method is able to eliminate offsetting of bar stock when the scanning plane is not ideally perpendicular to the axis of bar stock.
Last but not least, the advantage of this solution is the ability to scan a detailed 3D model of bar stock surface, which is archived and may be reconstructed at any time later in an analytical application where detailed analyses may be implemented of bar stock shape precision.
Another significant characteristic of the solution is the design of the modular frame by which the required position of individual scanners is secured when measuring the required parameters.
Modular frame and variable setup of scanners in one or two measurement planes allows implementation of solution exactly by requirements of customer and make balanced combination of precision and cost, for implementation in the given difficult operating conditions.
Stage of Development:
Available for demonstration
IPs:
Patents granted

Partner sought

Type and Role of Partner Sought:
The university is looking for a system integrator (partner) focused on laser technology used in steel and metal industry. System integrator (partner) has to cover markets EU, Asia, USA and Latin America. Its role is to looking for end customers, engineering companies and rolling mill producers.
Partner has to have offices in EU, Asia (China, India, South Korea), USA and Latin America.
Next role of our partner must be product sales support, product service and regular maintenance, product spare parts selling, product manual localization, reporting feedback from customers, providing of the product market forecast, looking for ideas for the product innovations, support with the customers local safety rules.

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
Czech
English

Keywords

Technology Keywords:
02007008 Hierro y acero, estructuras metálicas
02002010 Mecanizado (torneado, perforado, moldeado, fresado, cepillado, cortado)