Intelligent Analysis of Utilization of Special Purpose Machines for Drilling Operations

Int J Adv Manuf Technol

Giasin

2021

Self Cite

High precision drilling is required to ensure the structural integrity of the aircraft. Therefore, strict quality controls are required to ensure optimum hole quality since hundreds of thousands of holes are drilled into different aircraft structures. The large number of holes required for riveting means that their installation must be carried out in a fast and precise manner. This can be achieved using multi-head drilling tools that can drill several holes simultaneously. The current study investigated the use of a multi-spindle drill head that can produce three holes simultaneously. Uncoated carbide and TiAlN-and TiSiN-coated carbide drills were used to assess cutting forces, hole surface roughness, burr formations and tool condition when machining Al2024 aerospace alloy under dry machining conditions. Analysis of variance was employed for estimating the relationships between the input parameters (spindle speed, feed and tool coating) and the studied hole quality metrics. Further, a regression model was developed with a regression coefficient (R 2 ) of more than 90% for the prediction of measured responses. Interestingly, better results in lower thrust force and surface roughness were obtained using the uncoated carbide drills compared with TiAlN and TiSiN. While the performance of TiAlN was found to be better than those obtained from TiSiN.

Section: Introductionmentioning

confidence: 99%

Multi-spindle drilling of Al2024 alloy and the effect of TiAlN and TiSiN-coated carbide drills for productivity improvement

Aamir

Int J Adv Manuf Technol

Giasin

2021

Self Cite

“…The structure of these machines is compact and modular' including different components such as machining and sliding units, table and chassis, rotary or sliding add-ons for table, spindle heads, supporting components, and other accessories (Figure 1). Because of their modular properties, they can produce similar or family products by rearranging their modular components [8,9]. The productivity and profitability of industries may considerably increase by using such machines [7].…”

Section: Introductionmentioning

confidence: 99%

An integrated model to use drilling modular machine tools

Vafadar

Int J Adv Manuf Technol

Hayward

2019

Self Cite

Modular machine tools provide a platform for drilling-related operations within automotive companies. The use of these machine tools is widespread; however, manufacturers wishing to use this technology frequently face the challenge of selecting the most appropriate manufacturing system. Accordingly, a comprehensive feasibility analysis procedure is required to assist decision makers before any investment is made on the preparation of detailed machine design or purchase one. This paper presents a model, which collects the previous works of the authors. To do this, an integrated framework for decision-making of using machine tools is developed. The aim of this model is to enable users to make a logical decision by assessing the strengths and limitations of machine tools. To do this, the parameters which have a key influence on the decision making process and relevant procedures are identified and integrated into a model. A case study is presented to illustrate the application of proposed model, and results are discussed. The results show that the proposed model is useful in assisting manufacturers in evaluating the performance of a modular machine tool in comparison with other alternatives.

“…These machines are designed based on current and future requirements of manufacturing systems and market demands [1,8]. Their modularity allows them to manufacture various products by applying minor changes to the machine's configuration by rearranging units and accessories [9,10]. These economic and productive machines are often used for drilling-related operations such as drilling, reaming and tapping which are typical holemaking operations and have large contribution to produce industrial parts [11].…”

Section: Introductionmentioning

confidence: 99%

“…While many advantages may be obtained by applying SPMs for producing industrial parts, the extent of application of these machines is not proportional to the achieved benefits. Furthermore, the design and manufacturing of SPM has relatively high cost and a proper justification of utilizing SPM and related components should be made before any decision to design and manufacture one [8,10]. Clearly, this process requires appropriate and effective evaluation which necessitates substantial data analysis and identification of the major factors affecting at the correctness of analysis [15].…”

Section: Introductionmentioning

confidence: 99%

“…Some studies applied Decision Support Systems (DSS) which majority of existing DSSs are limited to selecting machine tools and manufacturing systems by applying optimization tools [26]. Several publications reported use of expert systems for machine tool assessment to consider qualitative information [10,27]. From the above it can be concluded that there are some research about machine tools evaluation for decision making of utilizing them by using intelligent systems; yet performing feasibility analysis of utilizing SPMs by using intelligent system based on the expert and experience knowledge has not been adequately addressed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Technical feasibility analysis of utilizing special purpose machine tools

Vafadar

Journal of Manufacturing Systems

Hayward

et al. 2016

Self Cite

Special purpose machine tools (SPMs) are primarily used for performing drilling-related operations and are widely used in mass production including automotive component manufacturing. Utilization of SPM is considerably widespread; however, this technology is relatively new and expensive. The important problems facing manufacturing industries wishing to utilize this technology is feasibility analysis to decide whether a SPM can be utilised for production of the given part and if it is feasible which SPM components would be appropriate. Since the cost of utilizing SPM is high, feasibility analysis must be performed before any investment on detailed design. This paper proposes a technical feasibility analysis method which assists in deciding whether SPM is applicable for machining a given part to achieve the highest productivity. The method is based on the framework which consists of relations between the desired part properties to the characteristics of the SPM components. These relations are captured as rules and constraints in an intelligent system which is implemented in Visual Basic. Applying the proposed method to a number of industrial parts shows that it is a very useful tool in deciding when SPMs should be utilized