International Journal of Automation Technology最新文献_第2页

Influence of Pilot Hole and Work Material Hardness on Thread Milling with a Wireless Holder System 先导孔和工件材料硬度对使用无线夹具系统进行螺纹铣削的影响

IF 0.9

International Journal of Automation Technology Pub Date : 2024-07-05 DOI: 10.20965/ijat.2024.p0472

S. Matsui, Nobutoshi Ozaki, T. Hirogaki, E. Aoyama, Ryo Matsuda

引用次数: 0

Milling of TiBbm2 Particle Reinforced High-Modulus Steel 铣削 TiBbm2 粒子强化高模量钢

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0358

Hideharu Kato, Kazuya Matsumoto, Yukio Ito, Shigehiko Sakamoto, Hitoshi Sumiya

{"title":"Milling of TiBbm2 Particle Reinforced High-Modulus Steel","authors":"Hideharu Kato, Kazuya Matsumoto, Yukio Ito, Shigehiko Sakamoto, Hitoshi Sumiya","doi":"10.20965/ijat.2024.p0358","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0358","url":null,"abstract":"TiB2 particle reinforced high-stiffness steel is one of the composite materials that aim to improve Young’s modulus by compositing TiB2 particles into a stainless steel base phase. This material is designed to exhibit higher rigidity and strength than conventional iron-based materials by using TiB2 particles as the reinforcing phase, and is expected to reduce the weight of high-load components in engines. For this reason, tool life is very short when machining this material. Therefore, high Young’s modulus steel containing TiB2 particles is known to be one of the most difficult-to-cut materials. The purpose of this study was to investigate how to extend tool life in the milling of high-Young’s-modulus steel. Cutting speed dependence of tool life was investigated by end milling using a binderless CBN tool with excellent hardness and bending strength. In addition, the tool damage mechanism was also investigated. The results showed that tools composed of binderless CBN tool have a longer life than conventional CBN tool. In this type of binderless CBN tool, the tool wear rate tended to increase with increasing cutting speed. In addition, the longest tool life was obtained at a cutting speed of 1.25 m/s, though wear rate increased at a boundary cutting length of 1300 m. The wear rate was found to increase with increasing cutting speed. Temperature measurement results indicate that the primary cause of tool damage was mechanical wear, as the temperatures were much too low for a reaction between cBN and Fe. Friction tests revealed scratch marks on the tool originating from crushed cBN particles produced by the crushing of the cutting edge. This indicates that wear is accelerated by the high frictional energy of the cBN powder rubbing against the flank face.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inner Modulation Controlled Process for Suppression of Chatter Vibration in Double Inserts Turning 用于抑制双刀片车削中颤振的内调制控制工艺

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0374

Toshifumi Atsuta, Hidenori Yoshimura, Takashi Matsumura

{"title":"Inner Modulation Controlled Process for Suppression of Chatter Vibration in Double Inserts Turning","authors":"Toshifumi Atsuta, Hidenori Yoshimura, Takashi Matsumura","doi":"10.20965/ijat.2024.p0374","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0374","url":null,"abstract":"A novel cutting manner is presented to control regenerative chatter vibration in double inserts cutting, in which the forward and the backward inserts cut workpiece simultaneously with phase difference in the modulation of finished surface. In double inserts cutting, the forward insert is clamped above the backward insert. Both the inserts are positioned symmetrically with a height offset with respect to the workpiece rotation center. The forward insert mainly removes the material; while the backward insert cuts a part of the inner modulation to lose the regular excitation. The exciting force is also reduced with the cutting thickness of the forward insert after a workpiece revolution. Because the theoretical position offset of the inserts in the feed direction is small, the side cutting edges of inserts are aligned in the same position. The process parameters are determined by estimating the removal volume of the backward insert with the phase shift. The range of the cutting speed and the height offset are given by the frequency of the chatter vibration, which is nearly the same as the natural frequency of the workpiece in single degree of freedom. The proposed cutting manner is validated using comparison between the single insert and double inserts cuttings.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Reverse Finishing on Characteristics of Drilling Surface 反向精加工对钻井表面特征的影响

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0332

Yuzuha Ochi, Masatoshi Usui, Hiroyuki Sasahara

{"title":"Influence of Reverse Finishing on Characteristics of Drilling Surface","authors":"Yuzuha Ochi, Masatoshi Usui, Hiroyuki Sasahara","doi":"10.20965/ijat.2024.p0332","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0332","url":null,"abstract":"Aluminum alloys are often used in automobile and aircraft parts that require higher dimensional accuracy and durability. Drilling is often used in the machining process of these products and accounts for about 60% of the machining performed on these products. Deterioration of finishing surface accuracy in drilling causes problems such as decreased tool life due to wear and increased cost due to the introduction of the finishing process. The objective of this study is to evaluate the finished surface characteristics in the drilling of aluminum alloys using reverse finishing, with a focus on the cutting direction of finishing, with respect to the roughing direction. The torque and thrust force are smaller in reverse finishing than in forward finishing. The reduction effects of cutting force in reverse finishing were more significant when the finishing depth of cut was smaller in relation to the roughing-affected layer. Under conditions where the finishing depth was equal to or greater than the roughing-affected layer, it was possible to reduce cutting forces and improve surface roughness while obtaining compressive residual stresses equivalent to forward finishing.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Discharge-Assisted Turning for UD CFRP Under Low Voltage Condition 低电压条件下放电辅助 UD CFRP 车削

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0366

Hidetake Tanaka, Ryuta Kuboshima

引用次数: 0

Feasibility Study of Single-Point Incremental Forming for Discontinuous-Fiber CFRP Using Oil-Bath Heating 利用油浴加热对非连续纤维 CFRP 进行单点增量成型的可行性研究

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0433

Tatsuki Ikari, Hidetake Tanaka

{"title":"Feasibility Study of Single-Point Incremental Forming for Discontinuous-Fiber CFRP Using Oil-Bath Heating","authors":"Tatsuki Ikari, Hidetake Tanaka","doi":"10.20965/ijat.2024.p0433","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0433","url":null,"abstract":"Although, three-dimensional printing has several advantages, however there are currently many limitations. In particular, printed products using composite materials such as fiber-reinforced plastic have yet to achieve the same mechanical properties as those obtained from conventional manufacturing methods. In addition, fabricating thin plates or thin shell shapes with sufficient strength is challenging. Incremental forming enables high-mix, low-volume production of thin sheets. This method applies incremental deformation to thin sheets, the desired shape is obtained by accumulating the deformation, and no dies are required. Carbon-fiber-reinforced plastic (CFRP) materials have high specific strength. Discontinuous-fiber CFRP is capable of large plastic deformation under appropriate conditions due to the discontinuity of the reinforcement, and its mechanical properties are nearly isotropic due to the random fiber arrangement. The authors focused on this property and studied the application of single-point incremental forming to discontinuous carbon-fiber-reinforced polyamides. In this study, the workpiece was formed by heating it locally to a deformable temperature by the frictional heat between the rotating tool and the workpiece. The forming experiment was also conducted in an oil bath to keep the entire material at a suitable forming temperature. The results showed that the spindle speed affected forming results even in an oil bath and that heating using an oil bath suppressed deviations from the sine law for thickness and wall angle due to elastic deformation.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boiling of Coolant Near the Cutting Edge in High Speed Machining of Difficult-to-Cut Materials 高速加工难切削材料时切削刃附近冷却液的沸腾现象

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0400

Toshiyuki Obikawa, Wataru Matsumoto, Mamoru Hayashi, Chikara Morigo

{"title":"Boiling of Coolant Near the Cutting Edge in High Speed Machining of Difficult-to-Cut Materials","authors":"Toshiyuki Obikawa, Wataru Matsumoto, Mamoru Hayashi, Chikara Morigo","doi":"10.20965/ijat.2024.p0400","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0400","url":null,"abstract":"This study investigates film boiling of coolant as a cooling inhibitor in a narrow wedge-shaped space between the tool flank face and the machined surface of a workpiece, observed during high-speed turning of stainless steel SUS304 and nickel-based superalloy Inconel 718. The boiling, likely triggered by high surface temperatures at both the face and surface close to the cutting edge, impedes coolant access to the tool tip area and efficient cooling. Therefore, the impact of coolant pressure on the boiling zone size was initially explored across pressures ranging from 0.1 to 20 MPa. A burn mark band due to coolant boiling, distinctly visible on the flank face of an insert with a yellow hard coating, expanded over cutting time. The film boiling area width, or the distance from the flank wear area to the band, decreased with increasing coolant pressure, reflecting the enhanced cooling ability and tool life with high-pressure coolant. Applying Boyle–Charles’ law to film boiling indicated that vapor pressure was directly related to coolant velocity rather than pressure. In contrast, the boiling area width increased with increasing cutting speed.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141011683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation Approach for Residual Stress in Drilling of Aluminum Alloy 铝合金钻孔残余应力评估方法

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0406

Takashi Matsumura, Yusuke Akao, Shoichi Tamura

{"title":"Evaluation Approach for Residual Stress in Drilling of Aluminum Alloy","authors":"Takashi Matsumura, Yusuke Akao, Shoichi Tamura","doi":"10.20965/ijat.2024.p0406","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0406","url":null,"abstract":"Residual stress is one of the critical evaluation factors as well as machining accuracy and surface finish in cutting. From the perspective of the fastening strength of parts, residual stress in drilling has an influence on the product or part life. Especially in the aircraft manufacturing, the tensile residual stress is crucial as it can cause major accidents. However, few studies have focused on residual stress in drilling so far. Most of them investigated the characteristics of residual stress based on the experimental data. This paper discusses residual stress in drilling in terms of its mechanical effect. The residual stresses in the inner surfaces of holes were measured in the depth direction from the top of the plate. The change in the residual stress has good correlation with the chip flow direction and the load applied to the inner surface, which acts as a counter force to the cutting force near the outermost ends of the lips. The cutting force is determined using an analytical model based on the minimum cutting energy. The correlation between the residual stress and the direction of the load applied to the inner surface depends on the margin width and back taper on the peripheral sides of a drill. The effect of the margin contact on the residual stress is characterized by linear regression analysis. Finally, an analysis-neural network hybrid system was developed to estimate the residual stresses in drilling. In the system, the mechanical effects of the drilling process, which are the magnitude and direction of the load applied to the inner surface, are obtained through analytical simulation. Meanwhile, the margin effects are expressed as the coefficients in the linear functions, which are associated with the margin width and back taper angle by a neural network. Then, another neural network, working as a post process, estimates the residual stresses using the information of mechanical and margin effects. The developed system is validated by presenting a comparison between the estimated and the actual residual stresses.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141011552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of Surface Roughness Components in Turning with Single Point Tool—Measurement of Tool Edge Contour and Prediction of its Position During Cutting— 使用单点刀具车削时的表面粗糙度成分预测--测量刀具边缘轮廓并预测其在切削过程中的位置--

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0382

Ryo Sakamoto, Ryutaro Tanaka, Isaí Espinoza Torres, Israel Martínez Ramírez, K. Sekiya, Keiji Yamada

{"title":"Prediction of Surface Roughness Components in Turning with Single Point Tool—Measurement of Tool Edge Contour and Prediction of its Position During Cutting—","authors":"Ryo Sakamoto, Ryutaro Tanaka, Isaí Espinoza Torres, Israel Martínez Ramírez, K. Sekiya, Keiji Yamada","doi":"10.20965/ijat.2024.p0382","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0382","url":null,"abstract":"Surface roughness is affected by the tool geometry, feed rate, overcutting by built-up edge, and tool vibration in the depth of the cut direction. However, dividing the roughness value into each component is difficult. Therefore, a new prediction method for the position of the tool contour on the roughness curve is proposed to divide the measured roughness value into components. This proposed method consists of two processes. In one, the roughness curve is divided into the roughness curve formed during each revolution of the work material regardless of the clarity of the feed marks. The other is the process that predicts the vertical position of the tool contour. If the vertical position of the tool contour can be predicted, the vibration and overcutting components of roughness can also be predicted. In this study, the transition of roughness components such as the theoretical roughness, vibration width, and overcutting is studied with the increase in the cutting distance in the turning of chromium molybdenum steel, JIS SCM435. When supplying a 10% emulsion mist, the measured Rz is smaller than that of the dry condition. In both the dry and mist supply conditions, the measured Rz increases from the beginning of cutting then decreases and then increases again with the increase in the cutting distance. The largest component of the total roughness in both the dry and mist supply conditions is the theoretical roughness Rth. The ratio ranges between 50.3% and 78.7%. Regardless of the cutting conditions, the vibration width in the depth of the cut direction is relatively constant. The overcutting slightly increases after the start of cutting, then decreases when the maximum contact length exceeds approximately 0.1 mm. The proposed method verifies the ratio of the surface roughness components and is an effective method for improving the surface roughness.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Machining Device with Real-Time Visualization of Boundary Surface on Tool Rake Face and Cutting Chip 开发可实时显示刀具齿面和切屑边界表面的加工设备

IF 1.1

International Journal of Automation Technology Pub Date : 2024-05-05 DOI: 10.20965/ijat.2024.p0352

Masahiro Hagino

{"title":"Development of Machining Device with Real-Time Visualization of Boundary Surface on Tool Rake Face and Cutting Chip","authors":"Masahiro Hagino","doi":"10.20965/ijat.2024.p0352","DOIUrl":"https://doi.org/10.20965/ijat.2024.p0352","url":null,"abstract":"Analysis of cutting phenomena has been conducted for a long time and many researchers have elucidated the phenomena that may occur at the cutting-edge during machining; for example, built-up edges and welding phenomena on cutting edge. However, the existing research has focused on observing the tool and chips after machining, when the tool and work material have been cooled, and are under atmospheric pressure. Therefore, we consider that it is different from the phenomenon that occurs during cutting. Because the cutting edge of a tool is in a high-temperature and high-pressure environment during machining and is released from such an environment after machining, the cutting edge must be visualized to discuss the actual cutting phenomena. There have been research reports in the past that have visualized the backside of cutting chips; however, that experiment was far from actual cutting phenomena and was conducted at significantly low cutting speed. Thus, the visualization of the cutting phenomenon is physically extremely difficult at the cutting edge. Under such circumstances, this study developed a device that observed the behavior of the boundary surface between cutting chips and the rake face in real time from the backside of the rake face during machining. By using the developed device, we could visualize this phenomenon to acquire the data directly and visually, which can otherwise be grasped only indirectly. In this device, a camera was mounted on a tool holder, and a cutting tip made of a transparent material was used to observe rake face, cutting edge, and flank face which can be visualized during machining from the backside of the rake face within one field of view. This paper reports on the outline of the developed device, its method, and the results of experimental observation of the state of two-dimensional cutting using a lathe.","PeriodicalId":43716,"journal":{"name":"International Journal of Automation Technology","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141011802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0