Development of the process planning for machining prismatic parts
Machining of the complicated parts of high accuracy in large quantities has been an increasing demand since sophisticated technological equipment and machinery rapidly developed. These complicated components can be machined by employing NC machine tools. TIle motion commands for NC machine too...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/8012/1/24p%20SHAZAREL%20SHAMSUDIN.pdf |
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| Summary: | Machining of the complicated parts of high accuracy in large quantities has been an
increasing demand since sophisticated technological equipment and machinery
rapidly developed. These complicated components can be machined by employing
NC machine tools. TIle motion commands for NC machine tool are determined by
the path of the cutter. Obtaining optimal cutter path length is vital important in
reducing the machining time. Nevertheless, another factor which has also influenced
over machining time is the sequence of the machining operation. Hence, this project
has presented the development of the process planning for machining diaphragm
valve with Y - valve body (prismatic parts) with regard an optimum machining time.
An effective process planning was developed with considering two major influences
over machining time which are cutter path and machining operation sequence. Tool
paths planning and simulation have been done by Unigraphics CAD/CAM Software.
The machining operation is assumed to be carried out by 3-axis CNC vertical milling
machine and has five setups for machining completion. The process planning
developed comprises of six phases. They are fcature recognition, machining
operation selection, machine selection, cutting tool sclection, cutting parameters
selection and finally sequencing of the machining operation. The study results
revealed that the total shortest machining time was 99.81 minutcs resulted from an
optimum tool path and machining sequencc. The rcsults also revealed that two types
of cut paths have contributed to highcr machining timc which are zig and zig with
contour cut type. Both cut types were not suggcsted for machining of the diaphragm
valve with Y -valve body. |
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