Abstract
Accurate energy consumption modelling is critical for the improvement of energy efficiency in machining. Existing energy models of machining processes mainly focus on turning or milling, and there are few energy models for drilling. However, since drilling is often applied to roughing and semi-finishing, and the cutting parameters are large, the energy consumption is huge, and it is urgent to study the consumption of energy during the drilling process. In this paper, an energy consumption model for drilling processes was proposed. Idle power, cutting power, and auxiliary power were included in the proposed energy consumption model, using the cutting force to obtain the cutting power during drilling. Further, the relationship between cutting power and auxiliary power was analyzed. Cutting experiments were then carried out which confirmed the correctness of the proposed model. In addition, compared with several existing energy consumption models, the proposed model had better accuracy and applicability. It is expected that the proposed energy consumption model will have applications for the minimization of energy consumption and improvement of energy efficiency but not limited to only drilling energy consumption prediction.
Highlights
In recent years, with the intense discussion of a low-carbon economy [1] and carbon trading [2], energy issues have once again caused widespread concern [3]
During machining, the consumption of each component is complex, the total energy consumption of the machine tool can energy consumption of each component is complex, the total energy consumption of the machine be roughly divided into the idle power (Pidle ), the cutting power (Pcutting ), and the auxiliary power tool can be roughly divided into the idle power (Pidle), the cutting power (Pcutting), and the auxiliary (Pauxiliary ), which can be expressed as: power (Pauxiliary), which can be expressed as: P
Paper, an an energy energy consumption consumption model model for for drilling drilling processes processes was was proposed. It is is based based on on an of the the idle idle power, power, calculated based on on the the spindle spindle speed, speed, the the cutting cutting power, power, an equation equation consisting consisting of calculated based calculated from the the cutting cutting force, force, and and the the auxiliary auxiliary power, power, calculated calculated based based on on the the cutting cutting power
Summary
With the intense discussion of a low-carbon economy [1] and carbon trading [2], energy issues have once again caused widespread concern [3]. A number of energy consumption models have been proposed, for machining These existing models can be broadly classified into two categories: material removal rate (MRR)-based and detailed parameter (DPT)-based models [8]. Kara and Li [10] proposed a specific energy consumption model, which proved to be of high accuracy for both lathes and milling machines. To further improve the above energy models, Liu et al [19] proposed a method based on the cutting force to establish an energy consumption model for the milling. The same MRR can be combined from many different processing parameters; cutting experiments have shown that energy consumption is not always the same at the same MRR, as many other affecting factors need to be considered. The model was validated in experiments and achieved high prediction accuracy
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