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III. Work in pairs. Study the prompts in italics. Think of 2 or 3 sentences using the words from Ex. I applying the rule studied. Discuss

Pic. 16

Pic. 17

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V. Read the text and give the definition of the word “cell”.

CELLS AS

BASIC BUILDING BLOCKS OF FMSs

Сthan an operating group of several machines, perhaps with a material handlingиsystem that will work together but remain an isolated group, and cells that are made up of system-ready machines, specially planned for and intended to be expanded or integrated into a larger system.

The cell has always been considered as the basic building block of an FMS. And although there is a considerable activity in multiple-machine systems, the largest portion of the growth in interest in an FMS today is in

cells. This includes both cells that are never intended to be anything more

The cell has all the elements of a full FMS. Typically, the cell includes many manufacturing components such as two or three machine tools, material handling system, pallet changers, a workpiece store, a conveyor, robot, quality control system, host computer and management in-

growth in both the number of suppliers and users. Their appearance and frequent application closed an important gap between the individual machine tool and the interlinked systems.

For example, the plant has set up two separate flexible machining cells, each of which has its own manufacturing strategy. One cell is made up of three-axis machining centres with a conveyor for pallet transfer. Its application is the machining of highly complex workpieces. For the lower

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quality components flexible transfer line system incorporating 10 threeaxis machining centres has been installed. In both cells minicomputers are responsible for supervisory control and there is full control systems compatibility across the two cells due to the adoption of uniform standards.

Summing it up one must say that current developments and/or trends Сare towards flexible cells and FMS concepts because the main benefits include improved productivity, better quality of product, less operator de-

pendence, more machine uptime during which a module can process parts and the potential for an unmanned third shift. To realize these benefits, however, proper design of the system and proper organization of the work ofиthe whole factory are required.

It should also be stressed that the application of the cell covers a much broader user base than the manufacturing or assembly systems do. The cell concept of an FMS technology has found its way into nearly every sector of manufacturing. A cell offers the best potential for production cost savings in small-batch production. The high level of interest in cell technology comes entirely from the fact that cells are an important form of au-

VII. Find the synonyms (the second column) to the words from the text (the first column). Classify them according to the part of speech: verb, noun, adjective, and adverb. Make up 3 sentences using the words from all the groups and both columns.

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C. Using Lessons 6 – 10, make a crossword puzzle (10 words from Ex. I). Then let your groupmates do it.

TEST YOURSELF

The cell has always been considered as the 1) ___ building block of an FMS. And although there is a considerable activity in multiple-machine systems, the largest portion of the growth in interest in an FMS today is in 2) ___. This includes both cells that are never intended to be anything more than an operating group of several 3) ___, perhaps with a material handling

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4) ___ that will 5) ___ together but 6) ___ an isolated group, and cells that are made up of 7) ___ machines, specially planned for and intended to be 8) ___ or 9) ___ into a larger system.

automatically on more than one 19) ___ which pass through the system along different 20) ___.

It is important to note that one of the 21) ___ of cells is their 22) ___

which means that, if any cell breaks down for any reason, the production planning and control system can 23) ___ and 24) ___ the production. This can only be done if not only the process, but also the routing of the parts

time duringбwhich a module can process parts and the potential for an unmanned third shift. To realize these benefits, however, 32) ___ design of the system and 33) ___ organization of the work of the whole factory are

required.

How many mistakes have you done? What are they?

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