CASE


06

2023

-

04

Grinding, Sanding, Polishing


Surfaces are eroded by abrasive particles in these mechanical processes. Surface finish ranges from coarse to mirror and can be a uniform texture or patterned,depending on the technique and type and size of abrasive particle. Grinding, sanding and polishing include a wide range of techniques.

Grinding, Sanding, Polishing

 

Surfaces are eroded by abrasive particles in these mechanical processes. Surface finish ranges from coarse to mirror and can be a uniform texture or patterned,depending on the technique and type and size of abrasive particle. Grinding, sanding and polishing include a wide range of techniques.

Alternative and competing processes include:

Metal Patination

Spray Painting

What is Mechanical Grinding, Sanding and Polishing?

These are common techniques used for cutting surfaces in industrial applications. Each is capable of applying a range of finishes, from super bright to very coarse,depending on the type of abrasive material. They all rely on lubrication, which reduces the build up of heat and wear on the cutting tool.

To achieve a highly reflective and super bright finish, the material will pass through a series of stages of surface cutting, which will use gradually finer grits of abrasive.

The role of each abrasive is to reduce the depth of surface undulation. In mirror polishing this is measured in terms of Ra (roughness average); a mirror polish is less than Ra 0.05 microns (0.0000019 in.).

QUALITY It is possible to grind and polish surfaces accurate to within fractions of a micron. Precision operations are considerably more expensive and time consuming, but are sometimes the only viable method of manufacture.

TYPICAL APPLICATIONS These processes are used in all manufacturing industries both for surface preparation and as precise finishing operations. Applications are widespread and cover both industrial and DIY projects.

COST AND SPEED Much grinding, sanding and polishing can be carried out with standard equipment. Consumables are a consideration for the unit price. Cycle time and labour costs are dependent on the size, complexity and smoothness of surface finish. Brightly polished surfaces can take many hours to achieve.

MATERIALS Most materials can be ground, sanded or polished,but the hardness of the material will affect how well it finishes,as well as how long it will take.

ENVIRONMENTAL IMPACTS Even though these are reductive processes, there is very little waste produced in operation.

Cases

2023-04-06

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