Tool wear investigation on the precision progressive die for the IC dam-bar cutting process

Abstract

The IC dam-bar cutting process is conducted with the precision progressive shearing die, while the cutting quality of the sheared product is subject to the wear status of the punch. The main objective of this study was to explore the relationship between the burnished band of the sheared surface and the wear of the shearing punch in the thin sheet cutting process. Firstly, the Taguchi method was applied to scheme the dam-bar cutting experiments. Two different HSS punches, ASP60 and SKH9, were used to punch the simulated leads made of the phosphor bronze C5191R-H. The variance analysis and confirmation experiments were also executed to verify the analytical results. The experimental data was collected to establish the punch wear estimated model. Secondly, a concept of an equivalent wear length of the punch flank was introduced to examine the wear of the punch flank, and the gravimetric wear rate was also calculated to examine the amount of the punch wear due to weight loss. Finally, the estimated model of the gravimetric wear rate through the burnished area of the dam-bar sheared surface was constructed. One can directly determine the status of the cutting punch depending on the size of the burnished band, as a basis for tool changing or regrinding. of the punch was able to be derived through the Int

Simulation of Contact Pressure in Sheet Metal Trimming/ Blanking Process

“…Fig. 3 shows the blanked profile of a 1mm thick AISI 304 stainless steel sheet observed by Hernandez et al [9] Simulation results shows similar characteristic areas on the sheared edge in Fig. 4.…”

“…2 Theoretical sheared edge profile [8] Fig. 3 Blanked profile of a 1mm stainless steel sheet [9] Materials Research Vols. 41-42…”

Machining characteristics of Inconel 718 using ultrasonic and high temperature-aided cutting

“…If the percent contribution of the error factor, P e , falls below 15%, it implies that the quality characteristics of the experiment are under a precise control. In contrast, if the percent contribution of the error factor exceeds 50%, it means that certain significant factor is overlooked and the experiments must be reviewed again (Lin and Chang, 2003). Table 5 is the ANOVA table for surface roughness and cutting force.…”