Banca de DEFESA: DÁVILA MOREIRA LOPES SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DÁVILA MOREIRA LOPES SILVA
DATE: 31/01/2020
TIME: 09:00
LOCAL: Sala 414 do CTEC - UFRN
TITLE:

Development of a hybrid dynamometer applied to the fourth axis of a vertical machine center

KEY WORDS:

dynamometer, strain gauges, machining, wireless data transmission, printed curcuit.

PAGES: 134
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUBÁREA: Projetos de Máquinas
SPECIALTY: Fundamentos Gerais de Projetos das Máquinas
SUMMARY:

In the context of multi-axis machining of mechanical components with freeform geometries, the conventional configurations of the dynamometers (stationary and rotary) are not suitable for operating conditions. This fact occurs due to the mounting of stationary devices limits the workpiece geometry and size, while the assembly of rotating devices is affected by interference in the signal under the conditions of high-speed spindle rotation. In order to propose a solution to this conflicting situation, this research has the objective of developing a hybrid dynamometer, based on strain gauges, mounted in the fourth axis of a vertical machining center and able to measure axial force and torque. Steps such as conceptual design, engineering analyses, instrumentation, static calibration and natural frequency evaluation were fundamental for manufacturing the device. In addition, the development of a wireless data transfer system have been developed. For this step, it was necessary to create a couple of printed circuits for signal conditioning and amplification, a wireless transmission module and a data processing code aiming the analysis of mechanical loading. The results showed that the conceptual design is appropriated to the dynamometer operating requirements to withstand loads of axial force up to 1 kN and torque up to 30 Nm, the dynamometer components were in accordance to the tolerances established in design, the performed instrumentation showed suitable to the application, the lower value of natural frequency of the device is 602,2 Hz.

BANKING MEMBERS:
Presidente - 1792669 - ADILSON JOSÉ DE OLIVEIRA
Interno - 1445637 - WALLACE MOREIRA BESSA
Externa à Instituição - ZILDA DE CASTRO SILVEIRA - USP