Abstract
This paper describes the important significance of cutting-edge technology in the machining of polycrystalline diamond (PCD) cutting inserts by comparing the evaluation criteria. The LASER technology of cutting-edge machining is compared with grinding and electrical discharge machining (EDM) technologies. To evaluate the data from the experiments, the Grey Relational Analysis (GRA) method was used to optimize the input factors of turning to achieve the required output parameters, namely the deviation of roundness and chip cross-section. The input factors of cutting speed, feed rate, depth of cut and corner radius were applied in the experiment for three different levels (minimum, medium and maximum). The optimal input factors for turning of aluminum alloy (AW 5083) were determined for the factorial plan according to Grey Relational Grade based on the GRA method for the multi-criteria of the output parameters. The results were confirmed by a verification test according to the GRA method and optimal values of input factors were recommended for the machining of Al-alloy (AW 5083) products. This material is currently being developed by engineers for forming selected components for the automotive and railway industries, mainly to reduce weight and energy costs. The best values of the output parameters were obtained at a cutting speed of 870 m/min, feed rate of 0.1 mm/min, depth of cut of 0.5 mm and a corner radius of 1.2 mm.
Highlights
Published: 24 August 2021In machining, the main focus is on reducing machining times while maintaining or improving the quality of the material being machined [1]
Dold et al applied the method of short pico-second pulses in machining cutting edges with LASER, which resulted in better wear resistance of the tools and increased tool life in machining carbon fiber materials compared to conventional grinding [24]
In the presented experiment we have identified two output parameters, namely the performance parameter chip cross-section and the qualitative parameter roundness deviation which is influenced by the formation of BUE, when turning Al alloy for cutting edge factors on a plate of LASER
Summary
The main focus is on reducing machining times while maintaining or improving the quality of the material being machined [1]. He presented the research results with the following conclusion and that in terms of achieving the required surface roughness parameter Ra both methods achieved almost the same surface roughness but in EDM technology, the diamond was converted to graphite at elevated temperature which resulted in degradation of the cutting tool [19]. Dold et al applied the method of short pico-second pulses in machining cutting edges with LASER, which resulted in better wear resistance of the tools and increased tool life in machining carbon fiber materials compared to conventional grinding [24]. In the first phase of the research, the results of the influence of three different technologies on the machining quality of the cutting edges of replaceable inserts designated DCGW 11T308 with a cutting edge made of super-hard polycrystalline diamond (PCD) are presented. The roundness deviation was chosen on the basis of the requirements for the manufacture of certain products
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