Capacity adjustment based on reconfigurable machine tools – Harmonising throughput time in job-shop manufacturing

Scholz‐Reiter, Bernd; Lappe, Dennis; Grundstein, Sebastian

doi:10.1016/j.cirp.2015.04.104

Cited by 27 publications

(4 citation statements)

References 13 publications

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“…Abdi and Labib 8 contributed an overall approach of grouping products into families based on operational similarities, when machines are still not identified. Scholz-Reiter et al 9 presented a novel approach of capacity control considering the potential of RMTs and substantiate the often disregarded potential of RMTs with simulation results. Shneor 10 presented the design and implementation of modular machine subsystems that enables various machining processes on the same computer numerical control (CNC) vertical milling machine.…”

Section: Introductionmentioning

confidence: 90%

Evaluation and optimization of the design schemes of reconfigurable machine tools based on multiple-attribute decision-making

Yang

Xin

2018

Advances in Mechanical Engineering

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A reconfigurable manufacturing system is one designed for rapid change in its structure, to quickly adjust its production capacity and functionality within a part family. Aiming at the diversity, cost and complexity of reconfiguration design, a method for evaluating the design scheme of a reconfigurable machine tool based on VIKOR is proposed. The module similarity between a reconfigurable machine tool and a prototype machine tool is defined, and on this basis, three quantitative evaluation indicators are established as follows: the module chain similarity determines the difficulty, effort, time and efficiency of machine tool reconstruction; the module interface complexity determines the feasibility and complexity of the disassembly and assembly of the reconfiguration module; and the reconfiguration cost determines the economic advantages of reconfigurable machines relative to fixed-structure equipment. According to three indicators, a multiattribute decision-making method based on VIKOR is used to evaluate, calculate and sort the design scheme set of the reconfigurable machine tool, and the optimal feasible solution is obtained. An example of the reconfiguration design of a machine tool is analysed to verify the validity and feasibility of the proposed method compared with the methods of simple average weighting and technique for order preference by similarity to an ideal solution.

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Section: Introductionmentioning

confidence: 90%

Evaluation and optimization of the design schemes of reconfigurable machine tools based on multiple-attribute decision-making

Yang

Xin

2018

Advances in Mechanical Engineering

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“…Reconfigurable machine tools (RMT), as one advanced piece of technology of Industry 4.0, provide a new opportunity for machinery-oriented capacity adjustment, which cannot be achieved using classical dedicated machine tools (DMT) only. In [12], RMTs were used in harmonizing the throughput-time capacity control approach to plan the delivery dates and analyze the inventory range of each workstation considering reconfiguration delays. The proportional-integral-differential (PID) control method [13,14] was applied to adjust the capacity, and a mathematical model of job shop systems was developed, including the new application degree of freedom of RMTs.…”

Section: Related Researchmentioning

confidence: 99%

“…The aim of these works was to improve productivity as well as to minimize cost and completion time. Another possibility to solve these problems is capacity adjustment in short-or mid-term horizons [12]. Related work is introduced in the next section.…”

Section: Introductionmentioning

confidence: 99%

Development of Operator Theory in the Capacity Adjustment of Job Shop Manufacturing Systems

2019

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With the development of industrial manufacture in the context of Industry 4.0, various advanced technologies have been designed, such as reconfigurable machine tools (RMT). However, the potential of the latter still needs to be developed. In this paper, the integration of RMTs was investigated in the capacity adjustment of job shop manufacturing systems, which offer high flexibility to produce a variety of products with small lot sizes. In order to assist manufacturers in dealing with demand fluctuations and ensure the work-in-process (WIP) of each workstation is on a predefined level, an operator-based robust right coprime factorization (RRCF) approach is proposed to improve the capacity adjustment process. Moreover, numerical simulation results of a four-workstation three-product job shop system are presented, where the classical proportional–integral–derivative (PID) control method is considered as a benchmark to evaluate the effectiveness of RRCF in the simulation. The simulation results present the practical stability and robustness of these two control systems for various reconfiguration and transportation delays and disturbances. This indicates that the proposed capacity control approach by integrating RMTs with RRCF is effective in dealing with bottlenecks and volatile customer demands.

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“…Therefore, research on the process planning method for part families in reconfigurable manufacturing will be of great significance for the reasonable and effective design of RMTs and RMSs [10]. At present, there has already been a lot of research on reconfigurable manufacturing system and the modular design of machine tools [11][12][13][14][15][16][17][18][19]. Among the research, the concept of the delayed reconfigurable manufacturing system (D-RMS) was proposed to improve the convertibility of RMSs by grouping parts with common former operations into the same part family and selecting appropriate machine types including dedicated machines, flexible machines, and reconfigurable machines [12].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Machine Tool Design for Box-Type Part Families

et al. 2021

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The reconfigurable manufacturing system (RMS) is a new manufacturing technology and paradigm that resolves the contradictions regarding high efficiency, low cost and flexible production in the mass production of part families. Reconfigurable machine tools (RMTs) are the core components of RMSs. A new approach is proposed for the design of RMTs, which is closely related to the process planning of a given box-type part family. The concepts of the processing unit and the processing segment are presented; they are not only the basic elements of the processing plans of machined parts, but also closely related to the structural design of RMTs. Processing units created by processing features can be combined into various processing segments. All the processing units of one processing segment correspond to the machining operations performed by one RMT. By arranging the processing segments according to the processing sequence, a variety of feasible processing plans for a part can be obtained. Through analysis of the established similarity calculation model for processing plans, the most similar processing plans for the parts in a given part family can be determined and used for the structural design of RMTs. Therefore, the designed RMTs can achieve rapid conversion of processing functions with the least module replacement or adjustment to realize the production of the parts in the part family. Taking the production of a gearbox part family as an example, the validity of the presented method is verified.

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Capacity adjustment based on reconfigurable machine tools – Harmonising throughput time in job-shop manufacturing

Cited by 27 publications

References 13 publications

Evaluation and optimization of the design schemes of reconfigurable machine tools based on multiple-attribute decision-making

Evaluation and optimization of the design schemes of reconfigurable machine tools based on multiple-attribute decision-making

Development of Operator Theory in the Capacity Adjustment of Job Shop Manufacturing Systems

Reconfigurable Machine Tool Design for Box-Type Part Families

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