Anıl Uzal, 030070012, 3rd week

Manufacturing Properties of Materials:

The manufacturing properties of materials determine whether they can be cast, formed, machined, joined, and heat-threated with relative ease (Table I.3). The method or methods used to process to the desired final shapes can affect the product’s performance, service life, and cost. (Kalpakjian S., Schmid S.R, Manufacturing Engineering and Technology 5^th Edition, p. 17)

Variant System:

Also called the derivative system, these computer files contain a standard process plan for the part to be manufactured. A search for a standard plan (based on its shape and its manufacturing characteristics) is made in the database by a code number for the part. The plan is retrieved, displayed for review, and printed as a routing sheet.

The variant-process plan includes information such as the types of tools and machines to be used, the sequence of manufacturing operations to be performed, the speeds, the feeds, and the time required for each sequence. Minor modifications of an existing process plan (which usually are necessary) also can be made. In the variant system, if the standard plan for a particular part is not in the computer files, a plan that is close to it (with a similar code number and an existing routing sheet) is retieved. If a routing sheet does not exist, one is mad efor the new part and stored in computer memory. (Kalpakjian S., Schmid S.R, Manufacturing Engineering and Technology 5^th Edition, p. 1205)

Polycodes:

Each digit in this code (also known as chain type) has its own interpretation, which does not depend on the preceding digit. This structure tends to be relatively long, but it allows the identification of specific part attributes and is well suited to computer implementation. (Kalpakjian S., Schmid S.R, Manufacturing Engineering and Technology 5^th Edition, p. 1212)

Fixed and Variable-Sequence Robots:

The fixed-sequence robot (also called a pick-and-place robot) is programmed for a specific sequence of operations. Its movements are from point to point, and the cycle is repeated continiously. These robots are simple and relatively inexpensive. The variable-sequence robot can be programmed for a specific sequence of operations but can be reprogrammed to perform another sequence of operations. (Kalpakjian S., Schmid S.R, Manufacturing Engineering and Technology 5^th Edition; p 1268)