Tesis profesional presentada por Roberto Sanz Camacho [roberto.sanzco@udlap.mx]

Miembro del programa de honores. Licenciatura en Ingeniería Mecánica. Departamento de Ingeniería Industrial y Mecánica. Escuela de Ingeniería, Universidad de las Américas Puebla.

Jurado Calificador

Presidente: Dr. René Ledesma Alonso
Vocal y Director: Dr. Tadeusz Majewski Szymiec
Secretario: Dr. Jorge Arturo Yescas Hernández

Cholula, Puebla, México a 7 de diciembre de 2018.

Resumen

The mathematical modelling of a Dynamic Eliminator of Vibrations is presented. This model is based on two drums that rotate in opposite directions with a speed equal to the excitation frequency of the system. These drums contain the same amount of free elements such as rollers or spheres that translate in a viscous environment and compensate the excitation forces with the action of their centrifugal force. Also, a rotary hammer working principle is modelled with a novel method for the...

Palabras clave: Vibrations, dynamic eliminator, rotary hammer, damping.

Resumen.

Índice de contenido

Portada

Agradecimientos

Índices

Capítulo 1. Introduction

  • 1.1 Context of the Research
  • 1.2 Research Questions
  • 1.3 Outline of the Document

Capítulo 2. Power Tools

  • 2.1 Introduction
  • 2.2 Power tools and their vibrations production
  • 2.3 Impact tools and their working principles
  • 2.4 Vibrations effects on health
  • 2.5 Damping systems for impact tools

Capítulo 3. Dynamic Eliminator of Vibrations

  • 3.1 Introduction
  • 3.2 Frahm´s undamped dynamic vibration absorber
  • 3.3 Proposed Dynamic Eliminator of Vibrations

Capítulo 4. Rotary Hammer experiments and modelling

  • 4.1 Introduction
  • 4.2 Experimental Set-up
  • 4.3 Modelling of rotary hammer - Kinetic model with algebraic equations
  • 4.4 Modelling of rotary hammer - Dynamic model with differential equations

Capítulo 5. Implementation of the Dynamic Eliminator of Vibrations to the Rotary Hammer

  • 5.1 Introduction
  • 5.2 Mathematical modelling of rotary hammer with DEV analyzed in one direction (model with 2 drums and 4 spheres)
  • 5.3 Mathematical modelling of rotary hammer with DEV analyzed in two directions (model with 2 drums and 4 spheres)

Capítulo 6. Implementation of the DEV to the rotary hammer with the addition of the chisel chuck spring

  • 6.1 Introduction
  • 6.2 Modelling of rotary hammer - Dynamic model with chisel chuck spring
  • 6.3 Mathematical modelling of rotary hammer with chisel spring connection and DEV implementation (2 directions, 2 drums, 4 spheres)

Capítulo 7. Conclusions

  • 7.1 Conclusions
  • 7.2 Future work

Referencias

Anexo 1. Appendices

Documento completo (archivo pdf, 3 mb)

Sanz Camacho, R. 2018. Modelling of a Rotary Hammer with the implementation of a Dynamic Eliminator of Vibrations. Tesis Licenciatura. Ingeniería Mecánica. Departamento de Ingeniería Industrial y Mecánica, Escuela de Ingeniería, Universidad de las Américas Puebla. Diciembre. Derechos Reservados © 2018.