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Simulering av avvikelser i munstyckesvägg under fräsoperation

Lundgren, Magnus (2009) MMTM01 20091
Production and Materials Engineering
Abstract
This report is written during a Master Thesis carried out at Volvo Aero Corporation, VAC, in relation with the Division of Production and Materials Engineering at Lund Institute of Technology. The purpose with this report is to get a better insight in some of the problems occurring during the manufacturing of a space nozzle.

At VAC a new kind of nozzle wall design has been introduced for their space nozzle. The design makes the nozzle lighter and stronger than the forerunner, but requires a tough manufacturing process with tight tolerances. The nozzle is made from a couple of plates shaped in geometries. These plates are first rolled and then welded together to form a straight cone i.e. a nozzle with straight wall profile. This cone is... (More)
This report is written during a Master Thesis carried out at Volvo Aero Corporation, VAC, in relation with the Division of Production and Materials Engineering at Lund Institute of Technology. The purpose with this report is to get a better insight in some of the problems occurring during the manufacturing of a space nozzle.

At VAC a new kind of nozzle wall design has been introduced for their space nozzle. The design makes the nozzle lighter and stronger than the forerunner, but requires a tough manufacturing process with tight tolerances. The nozzle is made from a couple of plates shaped in geometries. These plates are first rolled and then welded together to form a straight cone i.e. a nozzle with straight wall profile. This cone is then formed to the correct contoured shape. Deflections can occur in the nozzle surface during the forming and welding process. These deflections appear as waviness and may cause problems during the milling process. To get a better understanding of the properties of the waviness this study in the subject has been made.

During its lifetime, the nozzle is exposed for high temperature load and the tolerances must be kept very tight. The problem is when the milling tool passes a wave, one may not tell in advance how the wave will react. A sensor system has been introduced, which reads the structure of the nozzle wall compensate the milling toll’s path. This will prevent a too thin milled channel wall. If the wave is not stiff enough, the milling force will make the wave deflect and causing a too thick channel wall as a result. The best thing would be to straighten the waviness at the same time as the nozzle is fixed to the fixture. The total number of four methods have been investigated, including the present method. (Less)
Please use this url to cite or link to this publication:
author
Lundgren, Magnus
supervisor
organization
alternative title
Simulation of deflections in the nozzle wall during milling operation
course
MMTM01 20091
year
type
H2 - Master's Degree (Two Years)
subject
keywords
deflection, fastening, fixture, mill, fixing, tolerance, nozzle, milling operation
categories
Higher Education
other publication id
LUTMDN/(TMMV.5227)/1.70/2009
language
Swedish
id
2255501
date added to LUP
2012-09-10 10:14:03
date last changed
2012-09-10 10:14:03
@misc{2255501,
  abstract     = {This report is written during a Master Thesis carried out at Volvo Aero Corporation, VAC, in relation with the Division of Production and Materials Engineering at Lund Institute of Technology. The purpose with this report is to get a better insight in some of the problems occurring during the manufacturing of a space nozzle.

At VAC a new kind of nozzle wall design has been introduced for their space nozzle. The design makes the nozzle lighter and stronger than the forerunner, but requires a tough manufacturing process with tight tolerances. The nozzle is made from a couple of plates shaped in geometries. These plates are first rolled and then welded together to form a straight cone i.e. a nozzle with straight wall profile. This cone is then formed to the correct contoured shape. Deflections can occur in the nozzle surface during the forming and welding process. These deflections appear as waviness and may cause problems during the milling process. To get a better understanding of the properties of the waviness this study in the subject has been made.

During its lifetime, the nozzle is exposed for high temperature load and the tolerances must be kept very tight. The problem is when the milling tool passes a wave, one may not tell in advance how the wave will react. A sensor system has been introduced, which reads the structure of the nozzle wall compensate the milling toll’s path. This will prevent a too thin milled channel wall. If the wave is not stiff enough, the milling force will make the wave deflect and causing a too thick channel wall as a result. The best thing would be to straighten the waviness at the same time as the nozzle is fixed to the fixture. The total number of four methods have been investigated, including the present method.},
  author       = {Lundgren, Magnus},
  keyword      = {deflection,fastening,fixture,mill,fixing,tolerance,nozzle,milling operation},
  language     = {swe},
  note         = {Student Paper},
  title        = {Simulering av avvikelser i munstyckesvägg under fräsoperation},
  year         = {2009},
}