[en] The objective of this project is to demonstrate that it is possible to control broaching tool wear by monitoring machine variables without external sensors in a real production environment. Tool wear monitoring is an activity aimed at reducing production errors, improving product quality and achieving zero-defect manufacturing. In addition, broaching is a high value-added process so it is essential to improve the quality of both products and manufacturing processes. On the other hand, broaching can be a very costly process, so it is necessary to control the condition of the broaching tool at all times, to avoid improper use of the tool or damage to the workpiece. All this becomes more relevant in aeronautical manufacturing, where the parts have great added value and the experimental case presented in this paper is developed. The result of this research is achieved thanks to the correlation of signals of servomotor variables of a broaching machine, such as power or torque, with the state of the broaching tools. The results are obtained using data from two different trials in which similar tools were used. The data is then used to train a series of models that estimate broaching tool wear. Prior to the results, the experimental framework is presented, detailing the equipment and tools used in the trials and the method employed for broaching, including the image capture system designed for this project. All the models presented in this work accurately predict broaching tool wear with a coefficient of determination greater than 0.9.

[eu] Proiektu honen helburua da frogatzea posible dela brotxaketa erreminten higadura kontrolatzea, kanpoko sentsorerik gabeko makinaren aldagaiak monitorizatuz, benetako produkzio-inguru batean. Erreminten higaduraren gainbegiratzea, ekoizpen-akatsak murriztea , produktuen kalitatea hobetzea eta akatsik gabeko fabrikazioa lortzea helburu duen jarduera da. Gainera, brotxaketa balio erantsi handiko prozesua da, eta, beraz, funtsezkoa da produktuen zein fabrikazio-prozesuen kalitatea hobetzea. Bestalde, brotxatzea oso prozesu garestia izan daiteke, eta, beraz, brotxaketa-erremintaren egoera kontrolatu behar da une oro, erremintaren erabilera desegokia saihesteko edo lan-pieza ez kaltetzeko. Horrek guztiak garrantzi handiagoa hartzen du fabrikazio aeronautikoan, non piezek balio erantsi handia duten eta dokumentu honetan aurkezten den kasu esperimentala garatzen den. Ikerketa honen emaitza brotxaketa makina baten serbomotorren aldagaien irakurketen korrelazioari esker lortzen da, hala nola potentzia edo parea, brotxaketa erreminten egoerarekin. Emaitzak lortzeko, antzeko erremintak erabili diren bi saiakuntza desberdinetako datuak erabiltzen dira. Ondoren, datuak brotxaketa tresnen higadura estimatzen duten eredu batzuk entrenatzeko erabiltzen dira. Emaitzak lortu aurretik, esparru esperimentala aurkezten da, entseguetan erabilitako tresneria eta erremintak eta, brotxatzeko erabilitako metodoa zehaztuz, proiektu honetarako diseinatutako irudiak hartzeko sistema barne. Proiektu honetan aurkeztutako eredu guztiek zehaztasunez aurreikusten dute 0,9tik gorako determinazio-koefizientearekin brotxaketa erremintaren higadura.