SET-UP PLANNING AND FINDING THE FASTEST FEATURE MACHINING SEQUENCE IN FIXED AND MOVING JAWS OF POLMAN VISE-125 USING DYNAMIC PROGRAMMING ALGORITHM

• Main Author: Yazid Diratama, Mohammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48390
• Institution: Institut Teknologi Bandung

Ragum-125 Polman, is one among other different products, produced by Polman Bandung which functions as a clamping device. The ragum-125 Polman is assembled from several components where the fixed jaw and moving jaw are its main components. For the time being, the production process of the ragum-125 Polman, especially the fixed and moving jaws, still uses many conventional machines tools and requires many jigs (locating devices) and fixture (fixing devices). Consequently, the processing time is long. The production process requires fourteen (14) set-ups and many stages of the process from one machine to other machines, which is prone to process errors. The time required to make a pair (one fixed jaw and one moving jaw) is 10 hours. CNC machine tools have ability to do many machining operations in a single set-up and can minimize process errors because their movements are numerically controlled. However, in order to take the advantages of CNC machine tools, a good set-up planning is needed so that the process can be conducted according to the specifications. This thesis discusses the planning set-up for the machining of fixed and moving jaw features and finds for the fastest sequence of features machining to minimize the production times. Firstly, a set-up planning was made, followed by generation of mathematical model of tool path using SolidCAM®. Subsequently, the mathematical model of the cutting path (tool path) was converted into an open traveling salesman problem for finding the fastest sequence of feature machining using dynamic programming algorithms. The set-up planning had successfully reduced the number of set-ups to two (2) pieces for fixed jaws and one (1) fruit for mobile jaws. Futhermore, the process of finding the fastest feature machining sequence using a dynamic programming algorithm succeeded in cutting the production time from 10 hours to 4 hours for finishing a pair of ragum-125 polman (one fixed jaw and one motion jaw). This processing time was 60% faster than the current processing time conducted at Polman Bandung.