Implementation of a State of the Art First Operations Shop in a Second Tier Shipyard

2000 ◽  
Vol 16 (03) ◽  
pp. 133-150
Author(s):  
Patrick Cahill ◽  
Robert Shank ◽  
Patrick Crilly ◽  
Gordon Kelly ◽  
Tarsem Jutla ◽  
...  
Keyword(s):  
Machine Tool ◽  
Laser Cutting ◽  
Steel Plate ◽  
State Of The Art ◽  
Just In Time ◽  
Laser Machine ◽  
Shipbuilding Industry ◽  
Rule Change ◽  
Second Tier ◽  
Under Construction

Bender Shipbuilding and Repair Company, Inc. is in the process of modernizing a second tier shipyard and creating a state of the art facility which will house the only steel plate laser cutting machine in the U.S. shipbuilding industry, and one of the largest laser installations in the world. The laser machine tool will be installed in a state of the art First Operations Shop currently under construction at Bender Shipbuilding in Mobile, Alabama. By using a Maritech Consortium partnership with Caterpillar, Inc., Bender was able to completely evaluate cutting system options and design a complete First Operations process to support just in time production of steel plate parts. In addition, Bender and Caterpillar have teamed to pursue innovations in joining technology that can only be achieved with the precision machining capability of a laser machine tool. A Title XI Shipyard Modernization loan guarantee is being used to provide the working capital necessary to build the $6 million facility. This paper will review the state of technology of laser cutting in heavy manufacturing and in shipbuilding, provide an overview of Bender and Caterpillar's cutting project, present test results from an ongoing series of joining concept tests designed to initiate a rule change with the American Bureau of Shipping, and provide a comprehensive description of Bender's implementation plan for the First Operations Shop.

Dynamic Analysis and Experimental Research of Laser Cutting Machines

2014 ◽  
Vol 915-916 ◽  
pp. 31-34
Author(s):  
Qing Ping Zhang ◽  
Zheng Ru Wang ◽  
Yan Fang Wang
Keyword(s):  
Machine Tool ◽  
Modal Analysis ◽  
Laser Cutting ◽  
Machining Accuracy ◽  
Dynamics Analysis ◽  
Theoretical Base ◽  
Test Results ◽  
Cutting Machine ◽  
Manufacturing Errors ◽  
Theoretical Results

Vibration is one of the most important problems in laser cutting machine tool, which causes the manufacturing errors, also influences the machining accuracy of the parts. Modal analysis can calculate vibration type of structures. The paper presents how to use the powerful FEA software ANSYS to do the modal analysis on laser cutting machine tool and also studies the undamped free vibration on laser cutting machine tool. Finally, the test results and theoretical results were compared to verify the rationality of the modal, these provide theoretical base and conditions for dynamics analysis and optimal design.

Strategies and Outcomes in the Two Sectors of the Japanese Shipbuilding Industry

2001 ◽  
Vol 17 (03) ◽  
pp. 174-182
Author(s):  
Philip C. Koenig ◽  
Hitoshi Narita ◽  
Koichi Baba
Keyword(s):  
Business Strategy ◽  
Technological Development ◽  
Competitive Environment ◽  
Corporate Structure ◽  
Shipbuilding Industry ◽  
Second Tier ◽  
Two Sectors

The Japanese ocean-going shipbuilding industry has evolved into two distinct sectors and today's second tier or medium-sized firms build close to half the nation's output of large ocean-going vessels. Many vessels recently delivered by the major and the medium-sized shipbuilders are of similar size and complexity. However, the medium-sized shipbuilding companies of Japan differ considerably from the majors in business strategy and corporate structure. To date, studies published in English on the Japanese shipbuilding industry have focused mainly on the seven major firms. In this paper Japan's medium-sized shipbuilders are introduced. Their competitive environment, operations, and strategies are compared with those of the seven major firms. The relative strengths and weaknesses of the major and medium-sized shipbuilders are considered and the role of technological development in the long-term prospects of both is discussed.

Laser Machining for Secondary Finishing Applications

1995 ◽  
Vol 117 (4) ◽  
pp. 629-636 ◽  
Author(s):  
P. S. Sheng ◽  
Ko-Wang Liu
Keyword(s):  
Machine Tool ◽  
Laser Machining ◽  
Laser Machine ◽  
Flexible Machine ◽  
Cylindrical Workpiece ◽  
Parametric Dependencies ◽  
Wear Tool ◽  
One Machine ◽  
Initial Results ◽  
Fixed Beam

A laser-based technique for finishing axisymmetric parts is presented which allows the efficient finishing of polymers and ceramics without tool wear, tool breakage, or cutting forces. In this process, a laser beam impinges tangentially onto the surface of a cylindrical workpiece. A flexible machine tool can be developed to grind parts of differing geometries and materials by changing process parameters instead of setups or machines, as well as integrate primary machining and secondary finishing in one machine tool. The precision of laser finishing can be enhanced by using oblique beam impingement angles. Initial results show that Ra values less than 1 μm can be achieved on PMMA workpieces with a fixed beam. This paper presents the elements of the laser machine tool and preliminary results on parametric dependencies for laser finishing of polymer workpieces.

Regulatory Issues of Digital I&C System in Lungmen Project

2004 ◽  
Author(s):  
C. F. Chuang ◽  
H. P. Chou
Keyword(s):  
Nuclear Power ◽  
State Of The Art ◽  
Lessons Learned ◽  
Digital Design ◽  
Regulatory Requirements ◽  
Power Station ◽  
Fully Integrated ◽  
Regulatory Issues ◽  
Under Construction ◽  
And Control

The Lungmen Nuclear Power Station (LNPS) is currently under construction in Taiwan, which consists of two advanced boiling water reactor (ABWR) units. The instrumentation and control (I&C) systems of the LNPS are based on the state-of-the-art modernized fully integrated digital design. This paper presents regulatory overviews, regulatory requirements, current major regulatory issues, as well as the areas of regulatory concerns and the lessons learned on the digital I&C systems in the Lungmen Project.

A STUDY ON THE SURFACE QUALITIES OF FOUR POLYMER SUBSTRATE MICROCHANNELS USING CO2 LASER FOR MICROFLUIDIC CHIP

2019 ◽  
Vol 26 (03) ◽  
pp. 1850160
Author(s):  
ZENGLIANG HU ◽  
XUEYE CHEN ◽  
YI REN
Keyword(s):  
Polyethylene Terephthalate ◽  
Polymethyl Methacrylate ◽  
Microfluidic Chip ◽  
Laser Power ◽  
Laser Cutting ◽  
Cutting Speed ◽  
Processing Parameters ◽  
Polymer Substrate ◽  
Laser Machine ◽  
Polymer Substrates

The paper demonstrates four different polymer substrate microchannels are fabricated by CO2 laser machine. The four different polymer substrates are Polymethyl-methacrylate (PMMA), Polycarbonate (PC), Polystyrene (PS) and Polyethylene Terephthalate (PET), respectively. A number of microchannels are obtained and all roughness is measured. The four different polymer substrate microchannels are processed with different processing parameters. Laser power is set from 4[Formula: see text]W to 32[Formula: see text]W and laser cutting speed is set from 5[Formula: see text]mm/s to 30[Formula: see text]mm/s. The results show the roughness of PS substrate microchannel is lower than that of other three polymer substrate microchannels at the same parameters. When laser power is below 4[Formula: see text]W, the roughness of four polymer substrates are similar. The roughness of different polymer substrate microchannels decreases with the increase of laser power. The roughness of different polymer substrate microchannels also happens to change with increase of laser cutting speed.

scholarly journals CO2Laser Cutting, 2nd Edition, John Powell. 1998. Springer-Verlag. 248 pp. $79.95. ISBN 1-852-33047-3.

2000 ◽  
Vol 18 (4) ◽  
pp. 715-717
Author(s):  
Alexander F.H. Kaplan
Keyword(s):  
Laser Cutting ◽  
State Of The Art ◽  
Practical Experience ◽  
Job Shops ◽  
Power Laser ◽  
Laser Materials ◽  
Widespread Application ◽  
Know How ◽  
Highly Active ◽  
Technical Director

This book treats the most widespread application of high-power laser materials processing, that is, CO2 laser cutting. Although called CO2 laser cutting, most of the content of the book is also valid for cutting with other lasers such as Nd:YAG or Cu Vapor lasers. The technology is described in a very useful style by emphasizing practical aspects and by replacing highly scientific phrases by clear, illustrative explanations. Nevertheless, this guide through the complex field of laser cutting is accompanied by critical physical explanations throughout the whole book. It should be emphasized that Dr. Powell is the technical director of two job shops on laser cutting, but has also been highly active in science for many years. This ideal combination of practical experience with scientific know-how is reflected throughout the whole book by highlighting the practical aspects of laser cutting, often accompanied by very critical scientific explanations. It should be noted that the present second edition of the book differs from the first edition, printed in 1993, only by several pages that had to be updated according to the state of the art.

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