Design and Analysis of Integrated Manufacturing Systems (1988) / Chapter Skim
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Flexible Machining in an Integrated System
Flexible Machining in an Integrated System
Pages 34-45
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From page 34... ...
Transfer lines that were employed to reduce the labor hours consumed in making a product are being replaced by systems with greater flexibility. Flexible automation offers improved productivity and product affordability, yet it retains the benefit of improved quality that comes with hard automation.
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From page 35... ...
The two systems provide substantial insight into the contents of a generic factory automation life cycle. The following sections describe this life cycle and relate the FMC and IMS to it.
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From page 36... ...
This constitutes one of the basic difficulties in conducting financial analysis of flexible machining system installations. The creation of a synthetic presenttechnology cost center with conventional machining will allow a direct comparison without reliance on pool rates that may be either over- or under-inflated in relation to rates for the actual equipment replaced.
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From page 37... ...
Development System The next step in the factory automation life cycle is the selection of a vendor and the commitment of capital resources. This action formally initiates the development process and gives the proposed system an upper management, and even corporate, visibility.
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From page 38... ...
Implemented to meet specific detailed machined part needs for the B-1B program, the cell consists of Automated work changer carousels · Machining centers Chip and coolant system Material handling system Cleaning module Inspection modules · Automated storage and retrieval system for cutting tools Computer control system . Two 10-station carousels, obtained from Cincinnati Milacron, are employed to queue work in the load-unload area.
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From page 39... ...
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From page 40... ...
The two inspection modules, designed by Digital Electronics Automation, include electromechanical automated coordinate measuring machines for part geometry verification. Both cleaning and inspection modules are directed by the FMC host computer by means of specialized controllers using distributed numerical control programs.
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From page 41... ...
The IMS will encompass the functions for machined detail part fabrication of superplastically formed parts, castings, forgings, and plate stock, from the receipt and storage of raw material through the final unloading and tagging of a finished detail part, ready for hand finishing, nondestructive inspection, or processing. The IMS will incorporate design of a hierarchical computer control system to integrate the machin
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From page 42... ...
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From page 43... ...
: · Automated storage and retrieval systems for work-in-process (WIP) , cutter components, and cutter assemblies · Automated storage of pallets and fixtures · Material handling systems for the transfer of WIP and cutters · Cutter assembly buildup, preparation, and gauging · Load-unload stations for pallets, fixtures, and parts · Five-axis HSM of aluminum · Five-axis HTM of titanium · Automated washing · Automated dimensional inspection · Automated chip collection and chip transfer The IMS project's primary design objectives are to apply leading-edge machining technology to · Increase productivity of the LTVAPG machine shop in the fabrication of large, multiaxis aluminum and titanium parts · Decrease WIP inventory of high-value material · Reduce the direct cost per unit of output · Improve product quality · Improve throughput · Promote timely delivery of parts to assembly Productivity improvements resulting from IMS implementation will be the result of synergistic equipment and control operations along with advanced machining technology.
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From page 44... ...
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From page 45... ...
CIM is essential to financial survival for American industry in the l990s and beyond. In this new era of manufacturing, successful companies will be those American firms that cleveloped long-range plans in the 1980s and pursued evolutionary implementation of 45 those plans on the basis of specific business opportunities and technology applications.
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