Atsiliepimai

Įvertinimų nėra.

Įvertink ir tu! Visi atsiliepimai

Aprašymas

INTRODUCTION

1.1. Fundamentals of drilling

Drilling is one of the most widely used methods for making holes. The

cutting tool in this case is a drill with which a hole can be made from the solid

or the diameter of a previously drilled hole can be increased (enlarging holes).

The primary cutting motion in drilling is rotary a straight-line feed motion is

used, in the drilling process. Both of these motions are imparted to the drill

simultaneously. The drill is clamped in the spindle which rotates it and feeds it

down into the workpiece which is clamped stationary on the table.