Tool life investigation of carbide cutting tools in the turning of cast iron material. Tool life investigation of carbide cutting tools in the turning of cast iron material (original) (raw)

Tool life is an important thing to consider in the process of metal cutting. Before the machining process is done, it is necessary to know how long a cutting tool is capable of cutting before wear occurs. However, it is difficult to predict the life of the cutting tool, because each cutting tool has different characteristics in cutting metal. The research was conducted aimed at predicting the life of cutting tool using the Taylor equation, but the n and C constants contained in the equation vary for each type of cutting tool used in cutting workpieces. Through the experiment of cutting metal using a lathe, the cutting tool was observed and measured for wear, so that there was a limit to the value of the wear edge of the VB tool by 0.4 mm. The three cutting speed variants used in the cast iron machining are 180, 210 and 249 m / min. Observations were made every 10 minutes machining was stopped to be measured using a Digital Microscope if the wear value of the cutting tool has not been achieved, then machining continues. The worn cutting tool is no longer used in machining, then uses the new cutting tool. The results of the study showed that the increase in cutting speed had an effect on the wear rate that occurred in the cutting tool. The extended equation for Tool life of Taylor is obtained by Vc. Tl. 0.81 = 5011.87 1. Introduction The metal formation can be done using machine tools, one of which is the turning process. Workpiece materials such as cast iron have strong hard properties but are brittle, therefore we need cutting tools that have a high strength to do the cutting of hard metals. Often to increase the rate of production, the machining parameters used such as cutting speed, depth of cut, the feed rate is increased, this can give effect to the processing time can be shorter, but the effect of tool life is shorter. This is certainly very ineffective in the machining process because the cutting tool will always be replaced so that it creates non-productive time for the replacement of the cutting tools. The wear of cutting tools often occurs when the machining process is carried out to cut hard metals at high speeds, so it is not known how long the cutting tools can perform their functions at a cutting speed used. Therefore, it is necessary to predict cutting tool life when machining with varying cutting speeds. Through the experimental method and the development of tool life equations Taylorequations,this research was carried out to obtain an extended value of Taylor equitation tool life. The aim of this research is to predictive values of tool life cutting tools when the turning of cast iron workpieces so that it is known how long the life of cutting tools are used for various cutting speeds used.