scholarly journals Evaluation of Effectiveness and Cost of Machine Losses using Overall Equipment Effectiveness (OEE) and Overall Equipment Cost Loss (OECL) Methods, a case study on Toshiba CNC Machine

2020 ◽  
Vol 847 ◽  
pp. 012020
Author(s):  
Sarastya Dewi ◽  
Judi Alhilman ◽  
Fransiskus Tatas Dwi Atmaji
Keyword(s):  
Cnc Machine ◽  
Equipment Cost

Perancangan dan Pembuatan Alat Bantu Meja Putar untuk Mesin Cnc 4 Axis

2016 ◽  
Vol 10 (2) ◽  
pp. 162-171
Author(s):  
Hafid Hafid ◽  
Tatang Sutisna
Keyword(s):  
Processing Time ◽  
Rotary Table ◽  
Engineering Process ◽  
Cnc Machine ◽  
Economical Analysis ◽  
Machining Center ◽  
Design And Manufacturing ◽  
The Cost ◽  
Productivity And Competitiveness

The design and manufacturing of the rotary table with the specification Ø 170 mm (6 inches) for CNC machine 4 axis has been done. The objective of manufacturing a rotary table is to increase the efficiency of CNC machine Hardford 4 axis to be above 80% in line machining center CV. IM’s workshop. The engineering methods was taken, consist of: working preparation, manufacturing of working drawing, engineering process, the manufacturing and testing. The prototype has been tested and operated, the resulting of increasing productivity of which were as follows: the process of assembling was increased to be 3 time ( before 1 time) and processing time for a specific case reduced from 5 hours to 3 hours, number of operators for the case of assembling the rotary reduced to 1 person (before 4 persons), safety and security become to be better. The results show increased efficiency of CNC machine Hardford, from under 50% to be above 80%. Based on the economical analysis obtained by the cost of good sold (C.G.S) of the rotary table is IDR 34.060.000. The results presented in this paper is expected to be case study for developing a business of the metal and engineering SMEs domestic to the effort of improving efficiency, quality, productivity and competitiveness in global market.ABSTRAKPerancangan dan pembuatan alat bantu meja putar (rotary table) dengan spesifikasi teknis Ø 170 mm (6 inci) untuk mesin CNC 4 axis telah dilakukan. Tujuan pembuatan rotary table adalah untuk meningkatkan efisiensi mesin CNC Hardford 4 axis di atas 80% pada line machining center Bengkel CV. IM. Metode rancang bangun yang dilakukan, meliputi: persiapan kerja, pembuatan gambar kerja, proses engineering, pembuatan dan uji coba. Prototip tersebut telah diuji coba dan dioperasikan dengan hasil peningkatan produktivitas sebagai berikut: proses pengerjaan bongkar pasang meningkat menjadi 3 kali (sebelumnya 1 kali) dan waktu pengerjaan untuk kasus tertentu berkurang dari 5 jam menjadi 3 jam, jumlah operator untuk kasus bongkar pasang rotary berkurang menjadi 1 orang (sebelumnya 4 orang), keselamatan kerja dan keamanan menjadi lebih baik. Hasil peningkatan berupa efisiensi mesin CNC Hardford 4 axis dari sebelumnya di bawah 50% menjadi di atas 80%. Berdasarkan hasil perhitungan analisis ekonomi diperoleh harga pokok produksi (HPP) alat bantu meja putar adalah sebesar Rp. 34.060.000. Bahasan ini diharapkan menjadi contoh kasus bagi pengembangan usaha IKM logam dan mesin dalam negeri untuk meningkatkan efisiensi, mutu, produktivitas dan keunggulan daya saing di pasar global.Kata kunci: alat bantu meja putar, mesin CNC, harga pokok produksi

The Effectiveness of the Single Minute Exchange of Die (SMED) Technique for the Productivity Improvement

2013 ◽  
Vol 465-466 ◽  
pp. 1144-1148 ◽  
Author(s):  
Mohd Norzaimi Bin Che Ani ◽  
Mohd Sollahuddin Solihin Bin Shafei
Keyword(s):  
Processing Time ◽  
Systematic Approach ◽  
Process Time ◽  
Cnc Machine ◽  
Machine Process ◽  
Productivity Improvement ◽  
Internal Time ◽  
Set Up ◽  
The Impact

The Single Minute Exchange of Die (SMED), a process-based innovation originally published in the mid-1980s, involves the separation and conversion of internal setup operations into external ones. Traditionally some of the manufacturing company facing the problem loss of available time due to spent time for the changeover processes. Changeover process time meaning changing the programming or operation sequences on the machine based on process requirement during the change from one to another one model especially for the mixing parts. SMED technique is a systematic approach that enables to reduce dramatically the set-up time or changeover time. Normally in the SMED technique, it was segregated between internal and external set-up. External set-up means any processing time was done up front which is before machine stop and internal time is any tasks was performed during machine in operating, which is considering changeover time. The impact to organization that it was increasing the productivity, capacity and at the same time increased the revenue. This paper focuses on the improving the productivity on the CNC machine process through implementing SMED technique and eliminating waste in the case study company.

Simplifying the Development and Usage of Fixtures for Sheet Metal and Composite Aircraft Parts

1998 ◽  
Vol 122 (2) ◽  
pp. 370-373
Author(s):  
Daniel F. Walczyk ◽  
Vinay Raju
Keyword(s):  
Sheet Metal ◽  
Practical Implementation ◽  
Cad Model ◽  
Cnc Machine ◽  
Inexpensive Method ◽  
Actual Case ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Simplified Method

Based on a survey of small- to medium-sized companies that supply sheet metal parts to the major aircraft manufacturers, there is a need for a more simplified, flexible and inexpensive method to design, fabricate and register part fixtures used for CNC post forming operations (e.g., trimming, drilling). Consequently, a method has been developed that bases fixture development completely on the CAD model, eliminates the need for datum surfaces and registration features on the CNC machine workbed, and makes fixture fabrication as easy and inexpensive as possible while still maintaining high geometrical accuracy. Practical implementation of this simplified method and an actual case study are discussed. [S1087-1357(00)00102-7]

scholarly journals Predictivity of CNC Machine-Induced Vibrations on Inter-Story Floors Based on Coupled Experimental-Numerical Investigations

Proceedings ◽  
2020 ◽  
Vol 64 (1) ◽  
pp. 15
Author(s):  
Enrico Bergamo ◽  
Marco Fasan ◽  
Chiara Bedon
Keyword(s):  
Dynamic Performance ◽  
Numerical Control ◽  
Design Stage ◽  
Vibration Source ◽  
Cnc Machine ◽  
Industrial Facilities ◽  
Early Design Stage ◽  
The Past ◽  
Characterization Studies

Machine-induced vibrations and their control represent, for several reasons, a crucial design issue for buildings, and especially for industrial facilities. A special attention is required, at the early design stage, for the structural and dynamic performance assessment of the load-bearing members, given that they should be optimally withstand potentially severe machinery operations. To this aim, however, the knowledge of the input vibration source is crucial. This paper investigates a case-study eyewear factory built in Italy during 2019 and characterized by various non-isolated computer numerical control (CNC) vertical machinery centers mounted on the inter-story floor. Accordingly, the structure started to suffer for pronounced resonance issues. Following the past experience, this paper reports on the efficiency of a coupled experimental-numerical method for generalized predictive and characterization studies. The advantage is that the machinery features are derived from on-site experiments on the equipment, as well as on the floor. The experimental outcomes are then assessed and integrated with the support of Finite Element (FE) numerical simulations, to explore the resonance performance of the floor. The predictability of marked resonance issues is thus analyzed, with respect to the reference performance indicators.

Key Subsystem Identification of the CNC Machine Tools

2013 ◽  
Vol 329 ◽  
pp. 157-162 ◽  
Author(s):  
Xiao Cui Zhu ◽  
Fei Chen ◽  
Xiao Bing Li ◽  
Zhao Jun Yang ◽  
Ying Nan Kan ◽  
...  
Keyword(s):  
Machine Tools ◽  
Probability Function ◽  
Likelihood Estimation ◽  
Least Square ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Least Square Estimation ◽  
Failure Data ◽  
Novel Method

In order to find the key subsystems which affect the reliability of the CNC machine tools is an important and yet harder problem due to the lack of failure data and statistical analysis. A novel method based on posterior probability function for identifying the key subsystems of the CNC machine tools was proposed. Firstly, subsystem reliability of the CNC machine tools was estimated using the John estimator, since the failure data were censored. Secondly, parametric fitting was conduct with Weibull distribution using the maximum likelihood estimation (MLE) or the least square estimation (LSE). Thirdly, the probability function of each subsystems were attained by the reliability modes of the systems and the whole system. Finally, a case study was given, which proved that the proposed method could find out the key subsystems rapidly and accurately.

Execution of Lean and ZF Production System in Manufacturing Line for Productivity Enrichment - A Case Study

2018 ◽  
Vol 40 ◽  
pp. 171-183 ◽  
Author(s):  
Gunji Venkata Punna Rao ◽  
S. Nallusamy
Keyword(s):  
Cycle Time ◽  
Production System ◽  
Value Added ◽  
Line Balancing ◽  
Cnc Machine ◽  
Productivity Improvement ◽  
Standard Work ◽  
Manufacturing Line ◽  
Takt Time

The objective of this research is to implement the lean techniques over CNC machine cells with standardization and line balancing for reduction of overall lead time. The methodology used for this research is a combination of traditional lean system with ZF production system. The analysis was carried out over CNC machine cells with the objective of standardization and line balancing of the cells. Primarily the standardization of the CNC manufacturing cells were done, so that the process is streamlined and optimized without non-value added activity. Also this study deals with productivity improvement in manufacturing line through continuous improvement using kaizen approach. Observation of cycle time was carried out by video based work study technique. The operational videos such as cycle time of various processes were captured and improvement possibilities were identified. Then line balancing was done to overcome bottlenecks between operations to meet customer TAKT time and to increase overall productivity. The overall output has been improved from 22 to 30 per week for all models of gear box. Lean tools such as standard work procedure and Kaizen were employed and found that the overall cycle time was reduced by about 609 minutes with an improvement of 17.54%.

scholarly journals Case study of virtual reality in CNC machine tool exhibition

2017 ◽  
Vol 123 ◽  
pp. 00004 ◽  
Author(s):  
Yung-Chou Kao ◽  
Chung-Shuo Lee ◽  
Zhi-Ren Liu ◽  
Yu-Fu Lin
Keyword(s):  
Virtual Reality ◽  
Machine Tool ◽  
Cnc Machine Tool ◽  
Cnc Machine
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