Component Impact Testing
(2007) MMK820Innovation
- Abstract
- This master thesis has been made on behalf of Sony Ericsson in co-operation with
Machine Design at Lund Institute of Technology. The background is a need within Sony
Ericsson to test moulded plastic parts before they are assembled together to a phone.
There are today various specified tests that are made on every single phone before it is
launched, but they are all made on complete assembled phones.
The test method that exists today which gives most of the information about the design of
the plastic part and the quality of the plastics is the Free Fall test. In this test, the phone is
dropped in different directions from a height of 1.5 m. The aim with a new test method is
to perform a test in an earlier stage, at the plastic part... (More) - This master thesis has been made on behalf of Sony Ericsson in co-operation with
Machine Design at Lund Institute of Technology. The background is a need within Sony
Ericsson to test moulded plastic parts before they are assembled together to a phone.
There are today various specified tests that are made on every single phone before it is
launched, but they are all made on complete assembled phones.
The test method that exists today which gives most of the information about the design of
the plastic part and the quality of the plastics is the Free Fall test. In this test, the phone is
dropped in different directions from a height of 1.5 m. The aim with a new test method is
to perform a test in an earlier stage, at the plastic part suppliers instead of at Sony
Ericsson. In this way, the quality of the plastic part could be controlled from the first day
until mass production through a standardized manner.
The work consists of a development process where a number of concepts first have been
generated. The method used in the project is based on Ulrich, K. T. – Eppinger, S. D,
Product Design and Development. Some divergences from the method have been made
to adjust it to the present case. The concepts have been evaluated by us authors together
with employers within the company, to get a final concept for further development.
Fundamental facts were studied to be able to do appropriate adjustments for the coming
design work.
The chosen concept is a solution which consists of a pressure spring with a centralized
striker on top, which is supposed to hit the component. The spring and the striker are
placed inside a frame in order to have a controlled motion. With help of the prototype
workshop on Sony Ericsson, the first prototype was made from a 3D CAD- model. The
prototype was tested, advantages and disadvantages were verified with help of earlier
made calculations and desired aims. To test the prototype, a high-speed camera was used
where time and distance could be measured. The aim with the high-speed camera was to
evaluate the velocity of the striker. The erudition from this prototype was taken to the
next stage, where modifications were made to improve the design.
A second prototype was built, tested and verified. The earlier problems to tighten and
release the striker was solved with help of pneumatic, this made the whole process to
perform a test considerably easier. To decrease the friction in the frame, the inside of the
frame was blasted and lacquered. It resulted in a small increase of the velocity from the
previous prototype.
Finally test instructions and a test manual for the test equipment was made for the users,
to increase the safety and make the prototype easy to use. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/1502606
- author
- Karlsson, Kajsa and Sipöcz, Diana
- supervisor
- organization
- course
- MMK820
- year
- 2007
- type
- H2 - Master's Degree (Two Years)
- subject
- language
- English
- id
- 1502606
- date added to LUP
- 2009-11-09 13:28:12
- date last changed
- 2010-02-01 14:40:04
@misc{1502606,
abstract = {{This master thesis has been made on behalf of Sony Ericsson in co-operation with
Machine Design at Lund Institute of Technology. The background is a need within Sony
Ericsson to test moulded plastic parts before they are assembled together to a phone.
There are today various specified tests that are made on every single phone before it is
launched, but they are all made on complete assembled phones.
The test method that exists today which gives most of the information about the design of
the plastic part and the quality of the plastics is the Free Fall test. In this test, the phone is
dropped in different directions from a height of 1.5 m. The aim with a new test method is
to perform a test in an earlier stage, at the plastic part suppliers instead of at Sony
Ericsson. In this way, the quality of the plastic part could be controlled from the first day
until mass production through a standardized manner.
The work consists of a development process where a number of concepts first have been
generated. The method used in the project is based on Ulrich, K. T. – Eppinger, S. D,
Product Design and Development. Some divergences from the method have been made
to adjust it to the present case. The concepts have been evaluated by us authors together
with employers within the company, to get a final concept for further development.
Fundamental facts were studied to be able to do appropriate adjustments for the coming
design work.
The chosen concept is a solution which consists of a pressure spring with a centralized
striker on top, which is supposed to hit the component. The spring and the striker are
placed inside a frame in order to have a controlled motion. With help of the prototype
workshop on Sony Ericsson, the first prototype was made from a 3D CAD- model. The
prototype was tested, advantages and disadvantages were verified with help of earlier
made calculations and desired aims. To test the prototype, a high-speed camera was used
where time and distance could be measured. The aim with the high-speed camera was to
evaluate the velocity of the striker. The erudition from this prototype was taken to the
next stage, where modifications were made to improve the design.
A second prototype was built, tested and verified. The earlier problems to tighten and
release the striker was solved with help of pneumatic, this made the whole process to
perform a test considerably easier. To decrease the friction in the frame, the inside of the
frame was blasted and lacquered. It resulted in a small increase of the velocity from the
previous prototype.
Finally test instructions and a test manual for the test equipment was made for the users,
to increase the safety and make the prototype easy to use.}},
author = {{Karlsson, Kajsa and Sipöcz, Diana}},
language = {{eng}},
note = {{Student Paper}},
title = {{Component Impact Testing}},
year = {{2007}},
}