Adapted Process Strategies in Front Face Flow Drilling and Thread Forming of Lightweight Casting Materials

Felinks, Nils; Overberg, Till; Sarafraz, Yashar; Walther, Frank; Biermann, Dirk

doi:10.1016/j.procir.2021.10.034

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…The criterion that needs to be considered to select the proper lightweight design (LWD) strategy is not only limited to the low-weight material but also depends on the criterion such as low cost, short manufacturing time, high safety, long lifetime, or low environmental impact [1]. Manufacturing the internal thread using thread forming instead of conventional thread cutting can enhance the martial properties by inducing the work-hardening in thread profiles (VDI 3334), which can affect the static and dynamic properties of the formed threads [2,3]. Thread forming as a chipless process eliminates the cost-intensive chip removal, which reduces the environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Effect of Core Hole Diameter on Tensile and Fatigue Properties of the Helically Formed Internal Thread in AlSi10MnMg Cast Alloys

Sarafraz,

Felinks,

Biermann

et al. 2023

SSP

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The manufacturing of internal thread using the helical thread forming process (Punch Tap) as a novel high-performance manufacturing technology provides high productivity by reducing the tool path, which can save manufacturing time up to 75% compared to the conventional thread forming process. For instance, cast gearboxes in the transport sector consisting of numerous internal threads can benefit from this manufacturing method to realize detachable joints. While the required core hole diameter for conventional (cut) tapping depends on the thread dimension, this diameter depends either on the material properties for the thread forming process. The proper core hole diameter according to material flow possibility enables forming of complete thread profiles, which can consequently enhance the mechanical properties of the thread. This study aims to analyze the effect of the core hole diameter on the quality of the formed threads in AlSi10MnMg cast profiles. M6 threads were formed into the pre-drilled core holes with two different diameters. CT-scan analysis indicated that reducing the core hole diameter decreases the inner volume of the formed internal thread, which is justified by better material flow and complete forming of the thread profiles. Adaptation of the manufacturing parameters according to the material properties enhanced the geometry of the formed thread profiles. This enhancement increased the tensile and fatigue strengths of the detachable joints by subjecting the four initially formed threads at the top of manufactured nuts to the static and cyclic loads.

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Section: Introductionmentioning

confidence: 99%