- Created: 21-04-22
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What Is CNC Machining? An Overview of the CNC Machining Process
Computer Numerical Control (CNC) machining is a manufacturing process in which pre-programmed computer software dictates the movement of factory tools and machinery. The process can be used to control a range of complex machinery, from grinders and lathes to mills and CNC routers. With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts.
The CNC process runs in contrast to — and thereby supersedes — the limitations of manual control, where live operators are needed to prompt and guide the commands of machining tools via levers, buttons, and wheels. To the onlooker, a CNC system might resemble a regular set of computer components, but the software programs and consoles employed in CNC machining distinguish it from all other forms of computation.
How Does CNC Machining Work?
When a CNC system is activated, the desired cuts are programmed into the software and dictated to corresponding tools and machinery, which carry out the dimensional tasks as specified, much like a robot.
In CNC programming, the code generator within the numerical system will often assume mechanisms are flawless, despite the possibility of errors, which is greater whenever a CNC machine is directed to cut in more than one direction simultaneously. The placement of a tool in a numerical control system is outlined by a series of inputs known as the part program.
With a numerical control machine, programs are inputted via punch cards. By contrast, the programs for CNC machines are fed to computers through small keyboards. CNC programming is retained in a computer’s memory. The code itself is written and edited by programmers. Therefore, CNC systems offer far more expansive computational capacity. Best of all, CNC systems are by no means static since newer prompts can be added to pre-existing programs through revised code.
Why are CNC machined aluminum parts popular in manufacturing?
Aluminum is a choice of material for many manufacturers across the globe. Because of its excellent machinability and other characteristics, it is the preferred option for different applications. Aluminum also offers interesting mechanical and thermal properties. Besides, Aluminum is relatively easy to shape and can be drilled and milled effortlessly. Aluminum alloy is used more as compared to other low-weight metal materials. Aluminum is also an ideal material for prototypes.
Benefits for CNC machined aluminum parts
(1)Easy to bend
The main characteristic of Aluminum is that it can easily bend. This particular reason makes Aluminum the best option for CNC machining operations. Unlike steel, it can be turned into many different shapes during the machining process. The thickness of Aluminum makes it the best option for many molding methods. You can achieve a distinct structure by pressing and processing the Aluminum through CNC machining.
(2)Easy to process
Aluminum has many features that make it stand out when it comes to CNC machining materials. Just like its machining capability. Aluminum can be processed through different CNC machining operations such as punching, drilling, folding, etc. The Aluminum can be transferred into different forms and shapes. It takes low energy in machining as compared to the machining of steel.
Steel parts can be delicate in low-temperature environments and especially in welding. Aluminum materials are resistant to low temperatures. It can be easily machined in low temperatures as compared to steel material.
Brass and Copper Parts in CNC Machining
As we mentioned before, brass provides advantageous properties that make it an ideal option for a variety of applications. Why is that? When it comes to CNC machining, there are a few fundamental properties that make brass and copper parts ;outstanding.
The first one is the overall machinability. In simple terms, this property refers to how easy it is for the material to be machined. Brass is one of the easiest materials to machine. While many consider free-machining steels the comparison baseline for machinability, brass alloys generally have better machinability.
The strength and hardness properties of brass are also useful for a wide range of applications. Although brass has good strength, it is relatively soft compared to other materials such as steel alloys and titanium and is generally weaker than them.
However, this contributes in part to its much better machinability over those materials. So for applications that do not require the very high strength and hardness of steels or titanium, brass can be a worthwhile materials selection.
Brass alloys exhibit the same favorable strength and hardness characteristics you would expect from various aluminum alloys. They also boast remarkable corrosion resistance, especially when alloyed with small amounts of aluminum.
While they do see use in some electronics — thanks to good overall conductivity — one of the significant considerations for brass over aluminum tends to be how visually appealing brass is without the need for additional coatings.
All About Stainless Steel Machining CNC Machined Parts
Stainless steel part ;has the characteristics of corrosion resistance, scale resistance, acid resistance, impact resistance, and toughness in a wide temperature range. Depending on the environment, it can provide a variety of grades and surface finishes, making these parts an ideal choice for many applications. The chromium in the steel allows the formation of a rough, invisible, corrosion-resistant chromium oxide film on the steel surface. If the material is mechanically or chemically damaged, the film will repair itself (assuming oxygen is present). In addition, it is 100% recyclable feature provides a new way for stainless steel as an environmentally friendly material. Therefore, it has been widely used in heavy industry, light industry, daily necessities industry, and building decoration industries.
Advantages Of Stainless Steel Machining Parts
The thin and dense chromium-rich oxide film on the surface of stainless steel makes stainless steel water pipes have good corrosion resistance in all water quality including soft water, even if they are buried in the ground, they have excellent corrosion resistance.
Stainless steel can work safely for a long time at a temperature of -270℃-400℃, no matter whether it is high temperature or low temperature, no harmful substances will be precipitated, and the material performance is quite stable.
The stainless steel material is safe and non-toxic, has no corrosion and exudation, has no peculiar smell or turbidity, and will not cause secondary pollution to the water quality. It keeps the water quality pure and hygienic, and sanitary safety is fully guaranteed.
Key considerations for manufacturing plastic parts with CNC machining
Plastic parts ;are a ubiquitous part of daily life. From food packaging and gardening tools to laptops and sports equipment, it's hard to go a day without interacting with manufactured plastic parts.
One of the reasons that plastics are so prevalent is that they're a malleable and adaptable family of materials that can be used to create a wide variety of part types, from soft and flexible components that can withstand repetitive movements to harder, impact-resistant pieces that remain durable even in extreme temperatures.
There are several different methods that manufacturers can use to create plastic parts, including injection molding, additive manufacturing, urethane casting, and CNC machining. CNC machining is among the most common, due to its reliability, compatibility with a wide range of materials, and ability to create parts with complex geometries. ;
What Is CNC Turning? – Simply Explained
Computer numerical control (CNC) turning is a subtractive machining process where a cutting tool is placed against a spinning piece to take material off. This is usually done with a CNC lathe or turning center which cuts the material including wood, metal, and plastic. ;
Most subtractive CNC machines such as mills, water jets, and plasma cutters have the workpiece secured to a bed and the cutting done by a spinning tool. To cut, the tool moves across the workpiece or a tool head shoots at it. In contrast, CNC turning ;reverses that process by rotating the workpiece and cutting away at it (by moving a static cutting bit against the workpiece).
Because of how they operate, CNC mills are primarily used for creating complicated geometries, while CNC lathes are used for creating cylindrical or oblong shapes. A CNC lathe is usually chosen over a CNC mill or 3D printer because of its ability to make multiples of the same part incredibly fast and from one stock piece of material. ;
As we know, CNC turning is a type of lathe tooling operation that shears material from the outside of a component. This process is used to make a huge variety of things, from car engine pistons to the highest quality ball bearings.