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Frequently Asked Questions about CNC Machining

Views: 1     Author: Site Editor     Publish Time: 2022-06-07      Origin: Site

How does CNC machining work?


CNC machining uses subtractive processes, which means feedstock is machined to its final form by subtracting and removing material. Holes are drilled, lots and pathways are bored, and metal stock is shaped into new material with varying tapers, diameters, and shapes. For subtractive manufacturing, shapes are achieved by the subtraction of material. This contrasts with other types, such as additive manufacturing — where materials are added, layered, and deformed to a specified shape. It also contrasts with injection molding, where the material is injected into a different state of matter using a mold and formed into a specified shape.CNC machining is versatile — and can be used with various materials, including metals, plastics, wood, glass, foam, and other composite materials. This versatility has helped make CNC machining a popular choice across industries, enabling designers and engineers to fabricate products efficiently and precisely.


How does CNC machining differ from traditional machining?


In traditional machining, a skilled machinist operates a machine, removing or forming metal. This is done according to specifications provided by designers and engineers, usually through an engineering drawing or blueprint. They use turn wheels, dials, switches, chucks, vices, and various cutting tools made of hardened steel, carbide, and industrial diamond, then use measurement instruments to ensure all dimensions are correct.CNC machining performs the same function as traditional machining — metal cutting, drilling, milling, boring, grinding, and other metal forming and removal functions — but CNC machines use computer numerical control rather than manual control by a machinist. It is automated, driven by code, and developed by programmers. It is about as precise the first time of cutting as the 500th. It can be widely used in digital manufacturing (and sometimes in low-volume production runs) and can be revised and altered for modifications and different materials. This type of machining is much more precise and has superseded traditional machining (though not entirely) in manufacturing, fabrication, and industrial production. It uses mathematical coordinates and computing power to achieve the same end with the most fantastic accuracy. Specifically, computer numerical control uses Cartesian coordinates. These are spatial coordinates — in several dimensions — using coordinates and axes. The automation of cutting tool machines controls their cutting, boring, drilling, or other operation using the numerical control of a computer that reads the coordinates. Engineers designated these coordinates in the product’s digital drawing and design.


What industries use CNC machining?


CNC machining is widely used across industries. It is common in aerospace, automotive, consumer electronics, robotics, agriculture, and other fields that frequently use metal parts. It is also widely used in medical devices, household goods, energy, oil and gas, and other consumer applications. It is one of the most common manufacturing processes in the world. What is the history of CNC machining? During World War II, the United States was quickly churning out ships, aircraft, and vehicles for the military. And even once the war ended, production kept up as the country experienced a post-war boom in home construction, infrastructure expansion, and transportation. Naturally, engineers and designers needed tools to help them efficiently meet the growing demand for industrial products. Enter CNC machining.


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