2006-09-12 16:39:41 · 5 answers · asked by Cristiano 1 in Science & Mathematics ➔ Engineering
motor is the secret
2006-09-12 16:47:35 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You rotate the specimen about 90 degrees, at every change of the polish wheel. This knocks down (polishes off) the higher streaks of metal created by the previous wheel, to establish a new mean level. So its just a polishing technique, you can figure one out for yourself, but you might want to rely on the mistakes a century of metallurgists has already made.
2006-09-13 05:48:50 · answer #2 · answered by 10Speed 2 · 0⤊ 0⤋
Grinding is a process of polishing the metal surfaces for the following reasons:
1. To remove the dust over it.
2. To remove the rust (metal oxide)over it.
3. To get the smooth surface for further operation.
SO THE ANSWER IS TO GET THE HOMOGENOUS CLEAN SURFACE AND FLATNESS MORETHAN THAT IT IS ROTATED SO THAT THE POINT OF CONTACT SHOULD NOT GET BURNED OTHERWISE IT WILL GIVE THE MICROSTRUCTURAL VARIATION AND DIVERSIFIED PROPERTIES OF GIVEN METAL
2006-09-13 09:23:20 · answer #3 · answered by ashok k 2 · 0⤊ 0⤋
The metal specimen might have areas where it is impure. By rotating the sample, you assure that a mix representitive of the entire sample is achieved....you average out your sample, if you will.
2006-09-12 23:43:15 · answer #4 · answered by Bernard B 3 · 0⤊ 0⤋
to hit at a dfferent point everytime.
2006-09-12 23:41:39 · answer #5 · answered by hsarora47 4 · 0⤊ 0⤋