As the global manufacturing industry moves toward carbon neutrality, improving energy efficiency of machine tools has become essential. Although machine tools contribute significantly to industrial energy consumption, systematic methods for evaluating their energy consumption remain insufficient. To address this issue, this study developed an energy consumption evaluation system based on ISO 14955, the international standard for machine tool energy efficiency. The proposed system enabled a detailed analysis of energy usage patterns in different operating states, identifying key areas for energy reduction. The developed system could measure energy consumption of individual machine tool components in various operating states using power meters and automatically generates reports. This allows users to identify which components and operating states consume the most energy. We tested and validated this system on three different machine tools and analyzed strategies for reducing energy consumption. The developed evaluation system can help machine tool manufacturers integrate it into their equipment, develop energy-efficient technologies, and contribute to sustainable manufacturing.
Citations
Citations to this article as recorded by
Recent Advances in CNC Technology: Toward Autonomous and Sustainable Manufacturing Jong-Min Lim, Wontaek Song, Joon-Soo Lee, Ji-Myeong Park, Hee-Min Shin, In-Wook Oh, Soon-Hong Hwang, Seungmin Jeong, Sangwon Kang, Chan-Young Lee, Byung-Kwon Min International Journal of Precision Engineering and Manufacturing.2025; 26(9): 2311. CrossRef
The surface of railway wheels running on rails is subject to damage due to rail and frictional wear, damage from wheel tread and flange wear caused by curved track operations, and damage from flats and concave wear due to braking friction heat from brake shoes. Although the surface of wheels is regularly reprofiled through periodic grinding cycles, damage occurring to the wheel surface during operation can lead to deteriorated ride quality and potential failure due to crack propagation. In domestic railway components technical standards, wheel integrity is mandated to be demonstrated through non-destructive testing. To prevent and detect failures caused by damage occurring on railway wheels, it is necessary to develop methods that could detect and evaluate surface damage. The present study investigated a method for detecting and evaluating surface damage on railway wheels using electromagnetic imaging. Results demonstrated that defects with a length of 10 mm, a width of 0.8 to 1.0 mm, and a depth of 0.2 to 1.0 mm could be adequately detected using electromagnetic scan images.
Due to the recent 4th industrial revolution and explosive interest in smart factories, the demand for industrial robots and related technologies is rapidly increasing. In order to develop a precision reducer for robots, a measurement technology of the small teeth of a gear is very important. This paper developed a method to measure the tooth shape of a precision harmonic reducer for robots and to evaluate the tooth shape measurement error quantitatively. The tooth shape of the flexspline of a harmonic drive was measured using three instrumental devices: a stylus, a projector, and a laser line scanner. A mathematical tool was also developed to evaluate the error by comparing the designed and measured teeth. The measured tooth profile was quantitatively assessed with maximum, average, and root mean square error. The measurement method using a stylus has disadvantages of careful measurement effort and a small measuring range. However, it has better precision. On the other hand, the projection method shows a moderate performance without much effort during measurement.
Citations
Citations to this article as recorded by
The Prediction of the Angular Transmission Error of a Harmonic Drive by Measuring Noncontact Tooth Profile and Considering Three-dimensional Tooth Engagement Beom-Seok Kim, Seung-Tae Jeong, Hyeong-Joon Ahn International Journal of Precision Engineering and Manufacturing.2023; 24(3): 371. CrossRef
The measurement temperature characteristics in a semi-opened furnace used for performance evaluation of medium/low temperature ceramic fuel cells were experimentally examined. Temperature measurement positions were classified into two cases with the attached condition (A thermocouple is in contact with fuel cell surface) and the floated condition (A thermocouple is apart from the fuel cell surface). Compared to the floated condition, the attached condition exhibits the characteristics of higher measurement temperature and better temperature stability. When the measurement temperature of the attached and floated conditions based on calibrated temperatures were controlled to 250°C, the peak power density of ceramic fuel cells with yttrium-doped barium zirconate thin-film electrolyte was measured at approximately 50% smaller for the attached condition comparison with the floated condition. Comparison of the ohmic area specific resistance for ceramic fuel cells with yttria-stabilized zirconate substrate electrolyte showed that, for the performance evaluation reliability, the attached condition is more appropriate than the floated condition.
In this paper, we compare the cost of the structure due to change of weight of the structure according to change of annual power generation and height, calculated by changing wind speed of a 10kW horizontal small wind turbine, Optimum height of the wind turbine was considered. The cost of each model was calculated by changing height of the structure to 12 m, 24 m, 30 m, and 36 m. Wind speed was calculated by the Deacon formula, and annual power generation was calculated based on annual average wind speed at power generation height of each model. Then, economic efficiency was evaluated by comparing cost of the structure with total profit over the lifetime calculated by annual power generation, and a suitable model was selected based on evaluation. Computer analysis was conducted to evaluate structural stability of the selected model.
The mechanical drilling of micro holes is considered a difficult endeavor, due to the high hardness and brittleness of alumina plates found during the drilling process. In this work, an alumina plate with a 4mm thickness is drilled with the use of a continuous-wave Nd:YAG fiber laser. As can be seen, there is minimum required power density to ablate the alumina plate. As shown in this study, the hole diameter and straightness are not constant with the hole depth recorded, which is presumably due to the recondensation of vaporized alumina, and the characteristics of irregular laser radiation. The oxygen pressure, power density, focal position, and laser on time (duration) are chosen as the control parameters. To understand the influence of control parameters, the orthogonal arrays table in Taguchi method is applied, and the micro holes are evaluated based on the use of geometrical factors. Through the review of a sensitivity and interaction analysis, the appropriate duration and oxygen pressure are identified as the major parameters governing the geometrical quality of drilled holes in this study.
Citations
Citations to this article as recorded by
Micro Drilling of Single Crystal SiC Using Polycrystalline Diamond Tool Ui Seok Lee, Chan Young Yang, Ju Hyeon Lee, Bo Hyun Kim Journal of the Korean Society for Precision Engineering.2021; 38(7): 471. CrossRef
This paper proposes a new improved methodology to assess reconfiguration manufacturing system (RMS) adaptability in small and medium manufacturing industries. The evaluation of scenarios and alternatives for a reconfigurable design in manufacturing systems requires efficient and convenient methodologies to confirm the comparative evaluation metrics of the assigned KPI. Customizable factors are extracted and mapped for the design structure matrix and the analytic hierarchy processes. Reconfiguration event information is visualized as bill of resource. Evaluation format of KPI choice is then suggested. The reconfiguration control manager is designed to extract and combine the objects and the resource library of the reconfigurable assembly module and line. This paper first proposes the improved evaluation modeling frame and format with the newly refined KPI for the assessment of reconfiguration adaptability. Second, it shows the applicable suitability through a partly designed domain at the real automotive components manufacturing and assembly factory. Finally, it discusses the issues related with the customization and case results by the suggested evaluation methods.
The recent crisis of environmental pollution and resource depletion has become a major global issue, resulting in an increasing interest in remanufacturing in many countries. However, manufacturing for environmental protection is considered an additional cost factor by most companies. Therefore, governments worldwide have actively implemented remanufacturing policies to encourage the participation of numerous companies in the remanufacturing industry. As an eco-friendly technology, remanufacturing has impacted the environmental improvement and resource savings by reducing raw materials and production processes. In particular, the effect of machine tool and automobile part remanufacturing is very remarkable, since most parts are reusable. In this study, the standardization technology for remanufacturing process of machine tools is developed by remanufacturing of used vertical machining center. Based on the work operation sheet for establishing the process, the remanufacturing process chart and program were developed. The performance evaluation of machining centers before and after remanufacturing was also executed, to check the performance improvement of the remanufactured product. The performance evaluation criteria were established to improve reliability.
Citations
Citations to this article as recorded by
The promotion and application of green remanufacturing: a case study in a machine tool plant Boxue Song, Xingyu Jiang, Song Wang, Qing Liu, Tianbiao Yu Environmental Science and Pollution Research.2023; 30(14): 40870. CrossRef
A Study on the Remanufacturing of the Shaft in Large Size Planner Miller Using Structure Analysis Il-Hwan Park, Kwang-Kyu Lee, Dong-Gyu Ahn, Tae-Woo Kim, Sang-Seok Seol, Dae-Sun Hong Journal of the Korean Society of Manufacturing Process Engineers.2022; 21(10): 53. CrossRef
Remanufacturing Technology Development of Industrial Hydraulic Cylinder Kyu-Chang Lee, Woo-Hyun Son, Sang-Jin Park, Hak-Soo Mok Journal of the Korean Society of Manufacturing Technology Engineers.2018; 27(6): 539. CrossRef
Most of passive implants belong to medical device are consist of metallic and nonmetallic materials. According to the sort of components, it makes more influence into the human body. In this study, we performed induced-RF (Induced-Radio Frequency) heating evaluation which is part of MRI (Magnetic Resonance Imaging) compatibility and safety test and in-vivo pyrogen test with lumbar stand-alone cage. RF from 3T MRI coil was radiated on medical device, and provided heat nearby stand-alone cage. Thermal change detected areas are distinguished by metallic and nonmetallic part. As followed detection areas, febrility was shown and metallic part was slightly higher than control area, nonmetallic part. Furthermore, stand-alone cage was performed in accordance with in-vivo pyrogen test, and solution injected rabbits had no fever for test period. Through physically and biologically evaluated stand-alone cage, exothemic reaction was observed and we predicted the effect when it would be inserted in patient.
In sheet metal forming numerical analysis, the strain hardening equation has a significant effect on calculation results, especially in the field of spring-back. This study introduces the Kim-Tuan strain hardening model. This model represents sheet material behavior over the entire strain hardening range. The proposed model is compared to other well known strain hardening models using a series of uniaxial tensile tests. These tests are performed to determine the stress-strain relationship for Al6016-T4, DP980, and CP Ti sheets. In addition, the Kim-Tuan model is used to integrate the CP Ti sheet strain hardening equation in ABAQUS analysis to predict spring-back amount in a bending test. These tests highlight the improved accuracy of the proposed equation in the numerical field. Bending tests to evaluate prediction accuracy are also performed and compared with numerical analysis results.
Citations
Citations to this article as recorded by
General Blending Approach of Fundamental Cold Flow Models for an Almost Complete Cold Flow Model in Terms of Tensile Test Jong Bok Byun, Chang Woon Jee, Kwang Hee Lee, Man Soo Joun steel research international.2023;[Epub] CrossRef
Characterization of double strain-hardening behavior using a new flow of extremum curvature strain of Voce strain-hardening model JongBok Byun, ChangWoon Jee, IlDong Seo, ManSoo Joun Journal of Mechanical Science and Technology.2022; 36(8): 4115. CrossRef
Approximation Method for Stress–Strain Using Metamodel Parameter Updating Dong-Seok Shin, Euy-Sik Jeon, Young-Shin Kim Applied Sciences.2022; 12(6): 2868. CrossRef
A Review of Flow Characterization of Metallic Materials in the Cold Forming Temperature Range and Its Major Issues Man-Soo Joun, Mohd Kaswandee Razali, Chang-Woon Jee, Jong-Bok Byun, Min-Cheol Kim, Kwang-Min Kim Materials.2022; 15(8): 2751. CrossRef
Practical Blended Flow Models for Bulk Metal Forming Using the Cylindrical Tensile Test with Its Related Flow Behavior at Large Strain Chang Woon Jee, Su Min Ji, Jong Bok Byun, Man Soo Joun Journal of the Korean Society for Precision Engineering.2022; 39(8): 583. CrossRef
Inverse Approach of Parameter Optimization for Nonlinear Meta-Model Using Finite Element Simulation Seungpyo Hong, Dongseok Shin, Euysik Jeon Applied Sciences.2021; 11(24): 12026. CrossRef
Development of a Novel Plastic Hardening Model Based on Random Tree Growth Method Hyoung-Seo Son, Young-Gon Kim, Jin-Jae Kim, Young-Suk Kim Korean Journal of Metals and Materials.2020; 58(11): 741. CrossRef
Approximation of Non-Linear Stress–Strain Curve for GFRP Tensile Specimens by Inverse Method Dong Seok Shin, Young Shin Kim, Euy Sik Jeon Applied Sciences.2019; 9(17): 3474. CrossRef
Investigation of Springback Prediction for an Aluminum 7000 Sheet Subjected to Press Forming Quoc Tuan Pham, Jung Han Song, Joong Cheul Park, Young Suk Kim Applied Mechanics and Materials.2019; 889: 203. CrossRef
First
Prev
