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Title: Butt Joining Of Sheet By Shot Peening
Author: Harada, Fukaura, Yamamoto, Ujihashi, Kobayashi
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008042
Number of pages: 6
Abstract:
ABSTRACT
The ability of shot peening to enhance butt joining of the dissimilar sheets was investigated. In shot peening, the substrate undergoes a large plastic deformation near its
surface when hit by many shots. When the machined part with the bore and the groove is excessively shot peened, the accuracy of the shape is lowered as the amount of plastic
flow increases. This plastic flow is characterized by a shear droop at the edge of the substrate, i.e., the peened material overflows at the edge. When the dissimilar sheets
with the notched edges are connected without a level difference and then the connection is shot peened, the sheets can be joined by the plastic flow generated by the large
plastic deformation during shot peening. In this experiment, an air-type peening machine was used. The influences of processing conditions on the joinability were examined.
Tensile tests were performed to evaluate joint strengths. The joint strength increased with air pressure, i.e., the amount of plastic
flow. It was found that the present method can be used to enhance the butt joining of the dissimilar sheets.
KEY WORDS
Joining, Plastic flow, Joinability, Sheet
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This page last revised: 03/22/2010