Prediction of surface quality and optimization of process parameters in drilling of Delrin using neural network

Abstract

The high-temperature polymers like Acetal homopolymer (Delrin) currently have a wide variety of use. They are quite often utilized in traditional components to reduce weight, cost or meet a specific application requirement, and so on. Some of preferred uses of such polymers include aircraft interiors, wire insulation, wire couplings and fixtures, and so on, particularly at high-temperature applications. The machining process like drilling may affect the near net shape of the final product. This experimental study is done through modeling and optimization for identifying the suitable tool and optimum parameters for drilling of Delrin polymer under dry conditions to achieve high surface finish. The three levels of parameters such as spindle speed ( N), feed rate ( f), and tool point angle ( Θ) are taken as control parameters of the response variable. Two different commercially available tool materials namely high-speed steel drill tool and solid carbide tool are accounted in experiments. L27 orthogonal array is initially taken for the experimentation in CNC turning center with horizontal drilling setup. Artificial neural network is employed to sample, train, and test the input parameters in order to lessen the experimental error and measurement error of response variables. Response surface models are developed and optimal parameters toward the surface quality of the hole are determined through the desirability function approach. It is found that the surface generated under dry mode with speed of 1026 r/min, feed of 0.1 mm/min, point angle of 118° recorded the surface roughness of 0.699 µm, which is considered to be the best for drilling Delrin material.

Properties of the Surface Layer After Trochoidal Milling and Brushing: Experimental Study and Artificial Neural Network Simulation

“…The genetic algorithm (GA) was also used in the study. Neural networks' performance is further confirmed in predicting surface quality and optimization of process parameters [33], machining performance [34], or the cutting force and vibration [19].…”

Factor Selection in Drilling Unidirectional Carbon Fiber Reinforced Plastic Composite Plates with The HSS Drill Bit Using Analytic Hierarchy Process

“…Drilling describes a generic name whereby holes are created either through the conventional route that uses a drill bit (Shyha et al, 2009;Srinivasan et al 2017, Kaviarasan et al, 2019Manickam and Parthipan, 2020) or non-conventional route by frequent pulsing application of laser energy on the work material (Hirogaki et al, 2001;Padlee et al, 2011). Although the main focus of this review is on the conventional drilling process given its wide application, a brief highlight on laser drilling is essential as the technology of laser drilling has evolutionally used the drilling process.…”

“…Furthermore, with the background on laser drilling, most of the remaining literature review in this article is devoted to the conventional drilling process characterized by the use of drill bits. However, the approach is first to examine the study that utilized rice husk, a natural material in the drilling process (Jayaprakash et al, 2019), then Delrina polymer (Kaviarasan et al 2019), and then articles that centered on carbon fiber reinforced plastic composites in drilling (Lv et al, 2021;Gotham et al, 2021;Geiger et al 2021;Tamura and Matsumura, 2021). Interestingly, the rice husk composite (Jayapracash et al, 2019) for drilling purposes has opened up a research avenue with great potentials given the benefits of rice husk.…”

Assessments of Process Parameters on Cutting Force and Surface Roughness during Drilling of AA7075/TiB2 In Situ Composite

“…High surface finish is the requirement in machining of components. The variables such as cutting force, tool angle, depth of cut, speed and feed are independent parameters that control the surface roughness of the machining [ 15 , 16 , 17 ]. Some of the literature related to characterization of turning of AMCs is available.…”