A decision model for investment analysis in CNC centers and CAM technology

Płaza, Mirosław; Zębala, Wojciech

doi:10.1016/j.cie.2019.03.028

Cited by 8 publications

(10 citation statements)

References 71 publications

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“…These superalloys are most widely used in the aerospace industry in turbine blades, guide vanes, etc. [1,2,3]. Inconel 718 can be used within the temperature range of −290.15 to 973.15 K. The components of modern gas turbine engines need to resist temperatures higher than 2000 K (the melting point of nickel-based superalloys).…”

Section: Introductionmentioning

confidence: 99%

Impact of Process Parameters on the Quality of Deep Holes Drilled in Inconel 718 Using EDD

Machno

2019

Materials

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Advanced engineering materials (e.g., nickel or titanium alloy) are being increasingly applied to produce parts of gas turbines in the aerospace industry. To improve the durability of these parts, many holes, with a length-to-diameter aspect ratio greater than 20:1, are created in their structure. The quality of the holes significantly affects the cooling process of the elements. However, it is challenging to machine materials by conventional methods. When machining a hole with a high aspect ratio, the major problem is effective flushing of the machining area, which can improve the hole’s surface integrity and dimensional accuracy. Consequently, the electro-discharge drilling (EDD) process is good alternative for this application. This paper presents the results of an analysis of the EDD of Inconel 718 alloy. An experiment was conducted to evaluate the impact of process parameters (pulse time, current amplitude, and discharge voltage) on the process’s performance (linear tool wear, taper angle, drilling speed, the hole’s aspect ratio, and surface roughness (Ra and Rz)). The results show that EDD provides us with the possibility to drill holes with an aspect ratio greater than 10:1. The results also demonstrate that holes with an aspect ratio greater than 10:1 and a small taper angle value have a significantly decreased quality of internal surface, especially at the bottom of the hole. This indicates that an insufficient amount of debris is removed from the bottom of the hole.

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Section: Introductionmentioning

confidence: 99%

Impact of Process Parameters on the Quality of Deep Holes Drilled in Inconel 718 Using EDD

Machno

2019

Materials

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“…The S-curve and the simpler exponential curve are frequently used to track cost estimations and performance measurements in technology based projects (Plaza & Zebala, 2019a). For example Yang, Wang, & Pai, (2009) used the exponential curve to keep track of reduction in process cost and Koltai & Kalló, (2017) applied an exponential learning curve to determine the throughput-time in a production process of a pre-set quantity of goods in a simple assembly line.…”

Section: Application In Strategic Decision-makingmentioning

confidence: 99%

“…Therefore, they proposed a unified machining resource support system, that can help the managers to compare and choose between various CNC machining systems and auxiliary devices like cutting tool, bar feeders, robotic arm, etc. Similarly (Plaza & Zebala, (2019b) approach to model a decision support system that can determine the optimal combinations of machine and tool that will be most cost-effective. Furthermore, Rai et al, (2002) included constraints like capacity of machines and tool life to estimate cost of machining accurately.…”

Section: Dss Application In the Machining Industrymentioning

confidence: 99%

“…a is the amount of time required to produce the first unit of the batch and is dependent of the learning effects, x is the number of units in the batch and b represents the slope of the learning curve. Where 0 < b < 1 (Plaza & Zebala, 2019a). Jaber and Glock, (2013b) applied the learning curve into experimental data of a nonspecific repetitive manual assembly task to investigate the economic production quantity, but due to the increasing availability of newer technology and different methods of production, there is a need for another study focusing on the cost implications.…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Learning on the Selection of Cost-Effective Machining and Production Process

Hossain¹

2022

Preprint

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<p>Informed production decision-making requires a structured understanding of the production process and costs associated. This research proposes a decision support system incorporating the learning effects on selecting cost-effective machining production process. The approach is applied to the case on manufacturing wind turbine blades. The machining industry has experienced a surge in demand for complex machining applications and an availability of a wide range of new machining technologies. Producing complex structures requires experienced CNC programmers that perform extensive strategy planning, design and optimization. The system developed considers the production processes, cost items, power learning curve and experience of the programmers. This enables managers to evaluate between various production processes and select the most cost-efficient process. An analytical approach to evaluate cost efficiency between 3-axis CNC and 5-axis CNC machines. The result is a user-friendly planning and selection tool aiding in answering critical managerial questions related to cost-effectiveness.</p><div><br></div>

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“…NC yang kurang baik dapat menyebabkan: tabrakan alat di ruang kerja, masalah kualitas, dan ketidakefisienan proses [5,6,7]. Semua masalah ini berdampak negatif pada biaya produksi dan material [5,8,9]. Kode NC dapat di optimasi dimana proses optimasi NC meliputi dua tahapan.…”

Section: Pendahuluanunclassified

Analisis Pengaruh Modifikasi Gerakan Pahat pada Proses Permesinan Rumah Poci Komponen Dies Drawing Pedal Brake dengan Software Inventor CAM

Iskandar

Raharjo

Nugroho

2019

Rot.

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The brake pedal is an automotive component for footing on the braking system on three-wheeled vehicles. To make the brake pedal, it is necessary to have the die in the form of dies drawing brake pedal. One component of the dies is called the teapot component. The poci house is made of ST-42 steel material which serves as the main foundation and container of all the die components on the brake pedal drawing dies. The machining process that can be done to make a poci house is a milling process where there are three machining processes, namely the process of profile making, pocket making and the drill making process. One type of machine used to produce a teapot house is the CNC Hermle UWF 721H machine. Effective and efficient machining processes are needed to guarantee quality products with production costs along with minimal production time. This study examines the process of making teapot houses using InventorCAM software to determine the timing of machining, plotting and programming code (G-Code) of CNC machines that have been used so far whether it is optimal in cost and time calculation. Furthermore, the optimization process is carried out by modifying the stages of programming to find a more efficient and effective program. From the simulation results show that the modified machining process of the CNC home pot by changing the movement of profiling and making a hole (drill) obtained a shorter time which is to be 209.44 minutes before modification of 240.41 minutes. From financing by taking service rates from one of the companies in Semarang City where the tariff is Rp. 200,000 / hour, then the poci house produced before a program modification requires a service fee of Rp. 801,355.86,and after modification, the cost required is reduced to Rp. 698,132.33 Abstrak Diagram Alir Simulasi Permesinan Menggunakan InventorCAMProses simulasi pembuatan komponen dies drawing pedal brake menggunakan software bernama InventorCAM dimana mampu mensimulasi waktu dan kode pemrograman untuk mesin CNC sehingga mempermudah proses pengerjaan untuk membuat part atau komponen. Hasil dan Pembahasan Hasil Plotting dan Waktu Permesinan Rumah Poci dengan InventorCAM Mengacu Data Awal OperatorHasil simulasi menggunakan InventorCAM untuk pembuatan rumah poci salah satu komponen dies drawing pedal brake diperoleh hasil plotting untuk pembuatan profil, pocket dan jenis pembuatan lubang (drill) berdasarkan operator produksi dapat dilihat seperti pada Gambar 7 sampai Gambar 9.Gambar 7. Plotting pada pembuatan profil dan pocket rumah poci.Gambar 8. Plotting pada pembuatan lubang (drill) ø 10 mm dan pembuatan lubang (drill) ø 12 mm rumah poci.Gambar 9. Plotting pada pembuatan lubang (drill) ø 20 mm rumah poci.Dari hasil simulasi plotting menunjukkan bahwa InventorCAM secara otomatis mengkonfigurasi gerakan pahat yang sesuai dengan keinginan pengguna (user). Hasil simulasi dapat menunjukkan waktu permesinan untuk setiap proses yang dapat dinyatakan pada Tabel 1.

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A decision model for investment analysis in CNC centers and CAM technology

Cited by 8 publications

References 71 publications

Impact of Process Parameters on the Quality of Deep Holes Drilled in Inconel 718 Using EDD

Impact of Process Parameters on the Quality of Deep Holes Drilled in Inconel 718 Using EDD

The Impact of Learning on the Selection of Cost-Effective Machining and Production Process

Analisis Pengaruh Modifikasi Gerakan Pahat pada Proses Permesinan Rumah Poci Komponen Dies Drawing Pedal Brake dengan Software Inventor CAM

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