Punching and broaching combos - a newstamping tool

Abstract

The crescent searches for the reduction in time production are a factor that stimulates the improvement of the existent manufacturing techniques (Von Steeg 2002 and Waurzyniak 2002). Nowadays, the new researched processes should make possible the fabrication of pieces in a smaller time with a better use of the material resources and equipments (Klein 2002). The present work has for objective to show the viability of a combined tool that makes possible to perform a punching followed by a broaching in only one operation. This combo allies the advantages of the forming processes production and machining in only one process for heavy duty jobs on thick metal sheets. In this work were tested different configurations of combined punches. The objective was to analyze which are the main parameters that can have influence on the useful life of the tool in this new process, i.e., diameter of the punches and geometric form of the teeth for broaching. The precision overall depth of the holes, the roughness and the level of metal chip generation were measured. The analysis of the obtained data showed that the process is viable once were obtained holes with superior quality to the conventional stamping processes

Investigation on Hole Punching Process with Combined Punch to Improve Surface Quality during the Materials Forming Process

“…Bottom of conventional punch is shown in Fig. 1 [1]. For this purpose, it is able to modify the part of the process under conventional punching process to improve the quality of punching.…”

A novel punch design approach with progressive clearance variation for the punching–broaching process

“…Observing this research gap, Mello and Marcondes [11] reported a new perforating process via a punching-broaching combined tool, i.e. a tool with a punch tip and broaching teeth at its body.…”

A smart stamping tool for punching and broaching combination

“…In the Society of Manufacturing Engineers (SME, 1990), it is a descriptive on dies for broaching slots in a round shaft. Mello and Marcondes (2006) showed this new stamping tool of punching and broaching process composed basically by punch and die, Fig. 1.…”

“…In this process, the traditional punch was endowed with broaching teeth. Mello and Marcondes (2006) studied some diameters of the punches and geometric form of the teeth used for broaching. In this study, several items were analyzed in order to identify the main variables and their process influences, i.e.…”