Relevant Knowledge

Drilling is the process of removing material from the center of the material through the rotational motion of the drill bit and the axial feed motion, forming a circular hole. The central part of the drill bit is sharp, and due to the sharpness of the drill bit, the cutting ability of the edge is relatively strong in the case of cutting angles, making it easy to drill through materials.

Grinding machines and milling machines are commonly used tools in the machine processing industry, they are processed by cutting tools, but their principles and scope of application are different.
The grinding machine is through the rotation of the grinding wheel for precision grinding and polishing of the workpiece, can process high-precision parts under the accuracy of thousands of millimeters; However, its processing efficiency is relatively low, because more heat and chips are generated during grinding.

1.Different working principles
Drilling machine is the drill bit as the main processing tool, using the way of rotating friction to cut the workpiece. When the drill rotates at high speed, the material in the hole of the metal workpiece is gradually whittled away to form the hole of the desired size and shape. It occupies a small area and has a slightly single function.

The milling machine mainly refers to the machine tool that uses the milling cutter to process various surfaces of the workpiece. Usually the rotary motion of the milling cutter is the main motion, and the movement of the workpiece and the milling cutter is the feed motion. It can process planes, grooves, and can also process various surfaces, gears, etc.

Grinding machine is the use of grinding tools to grind the surface of the workpiece. Most grinding machines are the use of high-speed rotating grinding wheels for grinding, a few are the use of oil stone, sand belt and other abrasives and free abrasives for processing, such as honing machine, super finishing machine, sand belt grinder, grinder and polishing machine.

A drilling machine is a machine that mainly uses a drill to process holes in the workpiece. Its working principle is the main movement of the drill bit rotation, and the axial movement of the drill bit is feed movement. The structure of the drilling machine is relatively simple and the processing accuracy is relatively low, but it can carry out a variety of processing operations, such as drilling, bearizing, reaming or tapping. During the machining process, the workpiece is fixed and the tool moves and rotates to complete the machining of the workpiece. The drilling machine is characterized by the workpiece fixed and the cutting tool rotating motion.

Alloy steel - On the basis of ordinary carbon steel, in order to improve the performance of steel, one or more alloying elements are purposefully added to steel during smelting. According to the different added elements, and take the appropriate processing technology, can make the steel obtain higher mechanical properties, hardenability, tempering stability, strength

Unalloyed steel refers to iron-carbon alloys dominated by iron, with a mass fraction of carbon generally less than 2%, and containing a small number of other elements.