EXPERIMENTAL INVESTIGATION OF CHEMICAL ETCHING ON DIFFERENT MATERIALS USING NITRIC ACID

Savinderjit Singh, Hardeep Singh

Abstract: In this paper, the experimental work is done on different materials EN5 Steel and EN32 steel. Chemical etching technique is used for this purpose. These both materials are used for the low pressure dies or plastic dies. For the preparing of these dies the complex parts of dies are to be prepared by chemical etching technique. During the machining with chemical etching technique the overcut area of material is caused. In this experimentation minimum overcut area is concluded for best machining. Analysis of variance (ANOVA) is employed to investigate the influence of time, temperature and concentration on minimum overcut area of the material. The experiments was conducted to varying the parameters of etching process like temperature from 180 c to 220 c, Time from 2 hrs to 6 hrs and concentration 8% to 12% are studied in details according to Taguchis design of experiments. At last results are analyzed using Taguchi, ANOVA and parametric optimization is done for minimum overcut area of material. From the experimentation, it is concluded that for etching of EN5 steel and EN32 steel, optimum machining condition for minimum overcut area with Time (2hrs), Temperature (180 c), and Concentration (8%).

Keywords: ANOVA, OVERCUT AREA, TAGUCHI, ETCHING, EN5 STEEL, EN32 STEEL

DOI: https://doi.org/10.15623/ijret.2015.0406019