Buffing Machine

Buffing machine may refer to the term polishing machine, which is used to polish soft metal materials such as copper, brass, and sometimes for some non-metal materials such as plastics. The two mops spin at high speed when the on switch is pressed by the users, and the polish action should be applied to the rotating mop before pressing the work against it. The buffing process involves the shining of metal, wood, or composite materials using a cloth wheel impregnated with cutting compounds or rouges. The cloth buff will hold or carry the compound, but the compound does the cutting process.

Abrasive Cuttings

Buffing, polishing, and grinding may all be roughly regarded as abrasive cutting. There are a lot of processes to be introduced in the industry, and here we start with the most commonly known one: Grinding. Grinding machines are used to shape the outer, inner, or surface side of work pieces through the abrasive cutting mechanism. 

There are several types of grinding machine, such as center-less grinder, surface grinder, cylindrical grinder, just to name a few. The cylindrical grinder can process a variety of shapes; however, the object must have at least a central axis of rotation so it can be spinning concentrically. This includes but is not limited to cylindrical shapes, and can extend to shapes like cam, ellipse, crankshaft, etc. Cylindrical and surface grinding are two main categories in the grinding inventory. 

Surface grinding is one of the most critical key-links in the whole finishing process. After forming, cutting, and other complex processing, many work pieces will go to this step for finishing. The procedure of surface grinding is used to produce a smooth finished surface on either flat or other specific surfaces. It is a widely used abrasive machining process by which a spinning wheel is covered in rough particles that cuts chips of metallic or nonmetallic substance from a work piece, rendering a flat or smooth face. 

CNC surface grinding is a finishing process which utilizes a rotational abrasive wheel to smooth the surface of metallic or non-metallic materials by CNC system. It is conducted in order to deliver a refined physical situation by removing the layer and impurities on the work piece surfaces.

Differences between Buffing and Polishing

Even though polishing and buffing utilize abrasive measures to do the job, the two methods are slightly different. Generally speaking, polishing is a more aggressive procedure while buffing is less harsh to the work piece. Buffing usually leads to a smoother, brighter finish. Technically speaking, polishing uses an abrasive that is glued to the work wheel, but buffing utilizes a loose abrasive applied to the work wheel. These two differences determine the usages of these two processing procedures. 

The situation of the material to be machined determines what type of abrasive will be applied. At the first stage if the material is unfinished, users may start with a rough abrasive, which may be 60 or 80 grit, and each subsequent stage utilizes a finer abrasive, such as 120, 180, 220/240, 320 or higher grit abrasive levels. The abrasive levels will elevate until the desired finish is achieved by the users. 

There is a common misconception about polishing and buffing. That is, a polished surface contains a mirror bright finish quality, yet most mirror bright finishes are actually buffed instead. So the slight difference is controlled by industrial insiders to determine whether to use either way to machine the work pieces. 

Metal Polishing and Grinding

Polishing machines and surface grinding machines are similar in many extend. They are all finishing processes that use a rotating abrasive wheel to smooth the theoretically flat surface of metallic or nonmetallic materials to give them a much refined appearance by removing the oxide level and impure parts on the work piece surfaces. The process will also obtain a targeted surface for a functional purpose. 

The construction of grinding is also simple. Surface grinding machine is composed of an abrasive wheel, a work clamping device known as a hydraulic chuck, and a reciprocating or rotary table. The clamping mechanism holds the material in place while it is being operated. It can do this one of two ways: Firstly, the ferromagnetic pieces are held in place by a magnetic chuck, while non-ferromagnetic and nonmetallic pieces are held in place by vacuum or another mechanical means. 

In sum, buffing, polishing, and surface grinding are similar but slightly different measures to each other, and it is the users who are responsible to choose among them.

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