APLICAÇÃO DO BRAÇO DE MEDIÇÃO TRIDIMENSIONAL NO AJUSTE DE DISPOSITIVOS DE SOLDAGEM UM ESTUDO DE CASO

Abstract

This article presents a case study on the use of an articulated three-dimensional measuring arm to diagnose and support adjustments to welding fixtures used in the manufacture of metallic hydraulic tanks for agricultural machinery. The objective was to determine whether fixture corrections reduced dimensional deviations in welded assemblies and prevented customer assembly difficulties. Sixteen dimensional reports from four product groups were examined through an applied, quantitative, descriptive and documentary approach. Measurements were performed with a Hexagon Absolute Arm 6-Axis, series 83, with a 3 m reach, contact probes and PC-DMIS software. Results before and after the interventions were compared using reported nominal values, tolerances, deviations and the number of characteristics outside the specified limits. The largest absolute deviation of fixture 31K6_01812 decreased from 34.08 mm to 0.46 mm, while that of fixture 32K4_02622 decreased from 2.85 mm to 1.33 mm. The other documents supported the relationship between fixture condition and the dimensional behavior of pointed, assembled or welded parts. After validation and testing, no new customer assembly issues were reported for the analyzed items. The measuring arm therefore provided objective and traceable information for locating nonconformities, directing fixture corrections and confirming dimensional improvement, although some residual results required cautious interpretation.

Keywords: Dimensional metrology. Articulated arm. Coordinate inspection. PC-DMIS. Quality control.