問12
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CAMの導入効果として適切なものはどれか。
平成24年度 秋期 ITパスポート試験 問12
This question's explanation and your answers so far.
解説
問 12
- ア
正解 The correct answer is ア. CAM (Computer Aided Manufacturing) is a system in which a computer converts design data created with CAD into machining data and directly controls manufacturing equipment such as NC machine tools and robots, thereby supporting the actual production process. Because manual setup work and manual operation are replaced by machine control, variation in machining dimensions is reduced and the precision of manufacturing operations rises; waste in changeover and in running the equipment also decreases, so efficiency improves. Choice ア states exactly that “using a computer to control machine tools improves the precision and efficiency of manufacturing operations”, which is precisely the effect of introducing CAM. Keep in mind that what CAM covers is not design (CAD) or analysis (CAE), but “manufacturing”, the process that comes after design.
Incorrectイ
Calculating the timing and quantity of parts needed for production in order to make ordering more efficient is the effect of MRP (Material Requirements Planning). MRP is a production management method that works out required quantities from the production plan, the bill of materials (BOM), and inventory information; it does not control machine tools to carry out machining, so this is not an effect of CAM.
Incorrectウ
Simulating the performance of a product under design while varying the conditions is the effect of CAE (Computer Aided Engineering). It carries out analyses such as strength, heat, and fluid flow on a computer before a prototype is built, so as to make development more efficient; its role differs from that of CAM, which controls manufacturing equipment.
Incorrectエ
Designing while viewing three-dimensional shapes is the effect of CAD (Computer Aided Design). It describes improving the quality and efficiency of design work with 3D CAD, which is a different process from CAM, which receives the design data produced by CAD and then performs the machining.
ここがポイント
- CAM = Computer Aided Manufacturing. A system that uses design data as its basis and has a computer control equipment such as NC machine tools, raising the precision and efficiency of the manufacturing process.
- Tell the similar abbreviations apart by process: CAD = design, CAE = analysis and simulation, CAM = manufacturing, MRP = Material Requirements Planning (working out when parts are needed and how many).
用語