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Takamatsu-shi, Japan

Morimoto Y.,Kanazawa Institute of Technology | Suzuki N.,Takamatsu Machinery Co. | Kaneko Y.,Takamatsu Machinery Co. | Isobe M.,Takamatsu Machinery Co.
Journal of Manufacturing Science and Engineering, Transactions of the ASME | Year: 2014

A new computer numerically controlled (CNC) lathe with a pipe frame bed has been developed. This structure is expected to have enough space between the truss bars to solve the space problem and have enough rigidity for machine tools. Therefore, a CNC lathe whose frame consists of pipes, joints, and diagonal braces has been developed with enough rigidity and space utility for chip evacuation. From the viewpoint of machine tool usage, real-time vibration control theory is applied to control the relative displacement between the tool post and the spindle to suppress specific relative vibration modes. Copyright © 2014 by ASME. Source


Kato H.,Kanazawa Institute of Technology | Shikimura T.,Kanazawa Institute of Technology | Morimoto Y.,Kanazawa Institute of Technology | Shintani K.,Kanazawa Institute of Technology | And 2 more authors.
Key Engineering Materials | Year: 2012

Recently, cutting has replaced grinding in the finish processing of hardened steel. However, tool damage is a major problem in high-efficiency operations that use high-speed cutting and high feed rate conditions instead of the present cutting conditions. Therefore, the examination of a new cutting technique that can realize high-efficiency cutting is desired. In this study, the effects and efficiency of driven rotary cutting are investigated in the finish turning of carburized hardened steel. Based on the results, flaking occurs at the cutting edge at a short cutting length of 0.2 km using single-point turning. On the other hand, even if the cutting length amounts to 1.5 km, the tool wear width without flaking is small in the case of a driven rotary tool. Additionally, the tool wear is uniformly distributed along the circumference of the cutting edge. Furthermore, based on an examination of high-efficiency processing by increasing the feed rate, it is clarified that a feed rate of 0.3 mm/rev is the optimum condition from the viewpoint of wear resistance and surface roughness. Additionally, even if the cutting length amounts to 5.0 km for this condition, the flank wear width is as small as 0.04 mm, and the tool wear progresses gradually. © (2012) Trans Tech Publications, Switzerland. Source


Morimoto Y.,Kanazawa Institute of Technology | Nakagaki K.,Takamatsu Machinery Co. | Kato H.,Kanazawa Institute of Technology
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) | Year: 2013

A new CNC lathe driven by a linear motor has been developed to realize the machining of complex nonaxisymmetric curved surfaces with rotational axis such as eccentric and spiral cylindrical volume, conical cams and artificial femoral stem. These have been realized by milling and/or grinding machines. In this case, there is a serious problem. It takes a long time to machine by milling or grinding. Furthermore, the machining point between a curved surface and a milling tool or a grinding wheel can be regarded as a single point contact just as same as lathe turning. We propose a new turning method that improves the productivity remarkably by using a driven rotary tool with its unique tool layout. In this report, the machining result of the curved surface by the proposed turning method and the feasibility are also reported. Copyright © 2013 by ASME. Source


Kato H.,Kanazawa Institute of Technology | Shikimura T.,Kanazawa Institute of Technology | Morimoto Y.,Kanazawa Institute of Technology | Shintani K.,Kanazawa Institute of Technology | And 2 more authors.
International Journal of Automation Technology | Year: 2013

Recently, cutting has replaced grinding in the finish processing of hardened steel. However, tool damage is a major problem in high-efficiency operations that use high-speed cutting and high-feed rate conditions instead of the present cutting conditions. Therefore, the examination of a new cutting technique that can realize high-efficiency cutting is desired. In this study, the effects and efficiency of driven rotary cutting are investigated in the finish turning of carburized hardened steel. Based on the results, flaking occurs when single-point turning is used at the cutting edge at a short cutting length of 0.2 km. On the other hand, even if the cutting length amounts to 5.0 km, the tool wear width without flaking is small in the case of driven rotary cutting. Additionally, the tool wear is uniformly distributed along the circumference of the cutting edge. Furthermore, based on an examination of high-efficiency processing by increasing the feed rate, it is found that a feed rate of 0.3 mm/rev is the optimum condition from the viewpoint of wear resistance and surface roughness. Additionally, even if the cutting length amounts to 5.0 km for this condition, the flank wear is as narrow as 0.04 mm, and the tool wear progresses gradually. Source


Trademark
TAKAMATSU MACHINERY Co. | Date: 2006-10-31

Metal working machines and machine tools, namely, vertical machining centers, horizontal machining centers, grinding centers, CNC drilling centers, lathes, CNC lathes, high-speed precision lathes, turning centers; transfer apparatus, namely, loader, gantry loader, conveyer, cranes, and robots; chemical machines and apparatus, namely, filters for machines for use industrial robots in connection with control and repair of metal working machines; machine elements, namely, ball screws, couplings and cams; machine tool holders, namely, clamps, collet chucks, collet wrenches and racks and user manual and guides sold as a unit.

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