Abstract
In this study the applicability of hard turning is analyzed in the case of disc-shaped parts (gear wheels). The relevance of such parts has been increasing in the automotive industry; therefore, the efficiency of large series or mass production has high priority. The novelty of this paper is the collection of factors that has to be considered in preparation for applicability decisions of hard turning in order to ensure efficient machining. This can be the basis of the IT support, i.e. an automation solution for technologists. The introduced process is elaborated on the basis of theoretical considerations and production shop-floor experience.
Highlights
The machinability of hardened surfaces has been an issue of high importance for decades in the automotive industry [1, 2]
In the topic of machining efficiency a number of issues were studied in our previous works: machinability of various types [22, 23] and geometry [24] of surfaces in the case of disc-shaped parts; ensuring accuracy [25] and surface quality [26] of hard turned and ground parts; optimization of technological data of hard machining [27, 28]; analysis of material removal efficiency [29, 30]; and the necessity of applying coolant and lubricant [31]
Make a decision about the applicability of hard turning based on the hardness of the workpiece
Summary
The machinability of hardened surfaces has been an issue of high importance for decades in the automotive industry [1, 2]. The type of clamping and the hardness of the machined material [19] have to be considered, and whether the geometry of the tool and the tool holder allows machining [20] Another important factor is that the rigidity of the machine tool and the tool have to ensure the specified accuracy [21]. In the topic of machining efficiency a number of issues were studied in our previous works: machinability of various types [22, 23] and geometry [24] of surfaces in the case of disc-shaped parts; ensuring accuracy [25] and surface quality [26] of hard turned and ground parts; optimization of technological data of hard machining [27, 28]; analysis of material removal efficiency [29, 30]; and the necessity of applying coolant and lubricant [31]. The method was elaborated for gear wheels often used in transmission systems
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