Electric load management in spindle run-up and run-down for multi-spindle machine tools via optimal power-torque trajectories and peak load synchronization

Wójcicki, Jeremi; Bianchi, Giacomo

doi:10.1007/s00170-017-1341-7

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…We considered a smart multicenter three-spindle machine used to produce valves in a company in the north of Italy. Such a machine is a transfer line with a rotary table and three flexible numerically controlled modules, where different processing units (composed by a spindle and axes) work independently (W ojcicki and Bianchi, 2018).…”

Section: Case Studymentioning

confidence: 99%

Resource Overall Equipment Cost Loss indicator to assess equipment performance and product cost

Stefana

Cocca

Fantori

et al. 2022

IJPPM

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PurposeThis paper aims to overcome the inability of both comparing loss costs and accounting for production resource losses of Overall Equipment Effectiveness (OEE)-related approaches.Design/methodology/approachThe authors conducted a literature review about the studies focusing on approaches combining OEE with monetary units and/or resource issues. The authors developed an approach based on Overall Equipment Cost Loss (OECL), introducing a component for the production resource consumption of a machine. A real case study about a smart multicenter three-spindle machine is used to test the applicability of the approach.FindingsThe paper proposes Resource Overall Equipment Cost Loss (ROECL), i.e. a new KPI expressed in monetary units that represents the total cost of losses (including production resource ones) caused by inefficiencies and deviations of the machine or equipment from its optimal operating status occurring over a specific time period. ROECL enables to quantify the variation of the product cost occurring when a machine or equipment changes its health status and to determine the actual product cost for a given production order. In the analysed case study, the most critical production orders showed an actual production cost about 60% higher than the minimal cost possible under the most efficient operating conditions.Originality/valueThe proposed approach may support both production and cost accounting managers during the identification of areas requiring attention and representing opportunities for improvement in terms of availability, performance, quality, and resource losses.

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Section: Case Studymentioning

confidence: 99%

Resource Overall Equipment Cost Loss indicator to assess equipment performance and product cost

Stefana

Cocca

Fantori

et al. 2022

IJPPM

View full text Add to dashboard Cite

show abstract

“…According to the work presented by Wójcicki and Bianchi (2018), the energy efficiency of the spindle motor can be defined in Eq. (2).…”

Section: Energy Loss Of Spindle Motormentioning

confidence: 99%

“…For example, Liu et al (2017) developed a method to obtain the optimal working frequency and working torque of a motor, which can be used to select the spindle motors for high-efficiency spindle system design. Wójcicki and Bianchi (2018) studied the energy saving potentials of a spindle system of a computer numerical control (CNC) machine tool. Results of this study indicated that 10% energy consumption can be reduced by optimizing the spindle motor parameters such as the acceleration rate limit and the motor power limit.…”

Section: Introductionmentioning

confidence: 99%

Design optimization of lathe spindle system for optimum energy efficiency

et al. 2020

Journal of Cleaner Production

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Spindle system is the major mechanical component in machine tools, and its performance is responsible for a significant portion of the total consumed energy of machine tools. Conventional design optimization of spindle system is partially focused on parameter optimization of spindle motor or transmission system, contributing to an increase of the motor efficiency. Given that concurrent interactions among them is complex, very little efforts has been done to conduct integration optimization for optimum energy efficiency. To this end, a new approach of spindle system design is presented with consideration of the above two aspects adequately, to achieve the maximum energy and material efficiency. Firstly, the energy characteristic of spindle system is explicitly modeled on the basis of energy flow analysis. Then, a multi-objective optimization model for parameter optimization of spindle motor and transmission system is developed to take the both maximum energy efficiency and minimum volume as objectives, which is subjecting to a set of constraints with related to the cutting parameters boundary, processing requirements and shifting power losses. Finally, a multi-objective improved teaching-learning based optimization (MO-ITLBO) algorithm is presented to solve the developed optimization model. The performance of the proposed design approach of lathe spindle system is demonstrated through different working conditions. The experimental results indicate that the design of energy and material efficient machine tools can be achieved.

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“…However, the reverse magnetic properties of the rotating shaft materials were not taken into account [17][18][19]. Many researchers [20][21][22][23] proposed some new energy-saving management, which can enhance efficiency through optimizing the motor current and torque, but the research studies did not involve a better fit for the ceramic spindle in some special cases. Nowadays, little investigation has been conducted to improve the loss, harmonics, efficiency, energy management, and other aspects of the spindle.…”

Section: Introductionmentioning

confidence: 99%

Research on Ceramic Spindle Loss Based on Ceramic Reverse Magnetic Effect

Zhang

Wang

Bai

et al. 2020

Mathematical Problems in Engineering

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Ceramic motorized spindle is a multifield, nonlinear, and strong coupling system. The present model ignores the reverse magnetic effect and has a poor accuracy on the loss of the spindle system. In the paper, Park transformation was used to establish the electromagnetic physical model of ceramic motorized spindle. By combining with the Jiles–Atherton theory, an eccentric magnetization model of a ceramic motorized spindle considering reverse magnetic properties was established. Energy consumption parameters were calculated under various working conditions. The influence of ceramic reverse magnetic characteristics on the motorized spindle loss was analyzed and verified by experiments. The results show that the simulation of the ceramic motorized spindle loss model is in good agreement with the experimental results. Compared with the experimental results, the average loss error was 2.1%. Due to the reverse magnetic characteristics, the application of ceramic motorized spindle can help reduce the system loss. The ceramic motorized spindle model provides a theoretical basis for the development of ceramic spindle energy loss and efficiency.

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Electric load management in spindle run-up and run-down for multi-spindle machine tools via optimal power-torque trajectories and peak load synchronization

Cited by 11 publications

References 28 publications

Resource Overall Equipment Cost Loss indicator to assess equipment performance and product cost

Resource Overall Equipment Cost Loss indicator to assess equipment performance and product cost

Design optimization of lathe spindle system for optimum energy efficiency

Research on Ceramic Spindle Loss Based on Ceramic Reverse Magnetic Effect

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