TDC鏡面加工

Mirror Finishing/Mirror Polishing

We are going to introduce TDC’s Mirror Finishing/Mirror Polishing Services.

What Is Mirror Finishing/Mirror Polishing?

Mirror finishing/Polishing is a processing and finishing method for polishing the surface of a workpiece into a mirror-like surface. It can put a shine on the surfaces of workpieces of metals such as aluminum, iron, stainless steel, titanium or acrylic resins such as plastics. This is one of the processing methods with which our familiar products such as furniture, sundries, electronic devices, and automobile components are produced. Mirror finishing is particularly important in the precision processing and precision component fields.

It serves not only to produce the beauty of the surface but also to provide surface accuracy or impart smoothness to a component. In particular, mirror-finishing stainless steel requires high difficulty because different procedures and abrasive compounds are used for different kinds of stainless steel.

Typically, any one of the following three procedures is applied to mirror finishing.

  • Precision Cutting
  • Precision Grinding
  • Precision Polishing

Mirror Finishing by Precision Cutting

This is mirror finishing where the finishing shape and surface quality of a workpiece are obtained by scraping off excess parts from the workpiece using a cutting tool.

Please check “What is Cutting” for TDC’s precision cutting.

Mirror Finishing by Precision Grinding

This is mirror finishing where the surface of a workpiece is finely scraped off using a grinding machine and a grinding wheel rotating at a high speed.

Please check “What is Grinding” for TDC’s precision grinding.

Mirror Finishing by Precision Polishing

This is mirror finishing where the surface processing is applied to a workpiece by polishing it. 

Main polishing methods that are used in mirror polishing are as follows.

  • Lapping
    A product is polished with a lapping machine grinding abrasive compound, which contains abrasive grains, and the product abrade. While double-sided lapping is to polish a product with the product sandwiched between two lapping plates, single-sided lapping is to polish a product with the product placed on a lapping plate. Lapping is often used for mirror finishing or mirror polishing because a plane surface can be obtained with precision.
  • Buff polishing
    Buffing is a method in which a polishing tool, which is made of cotton or felt, is rotated at a high speed for polishing. This polishing is mostly performed manually. While it results in beautiful finish, it has some disadvantages such as differences in quality of finish and difficulty in large-lot production.
  • Barrel polishing
    This method is performed with workpieces, abrasive stones, an abrasive compound, and water set in a tank-shaped machine and then tumbled. While it is suited for large-lot production, it has a disadvantage that it is impossible to polish individual parts of a product.
  • Electropolishing
    It is a method where, while a workpiece to be polished is immersed into an electrolytic polishing solution, applied electricity causes chemical reaction that changes a metal surface. This method allows uniform processing of a surface and also allows polishing of parts not easy to physically polish such as narrow parts and minute parts.

Please check “Polishing Service” for TDC’s precision polishing.

Benefits of Mirror Finishing

Mirror finishing mainly provides the following three benefits.

  • Effectiveness in deburring
    Mirror polishing flattens irregularities of a workpiece, thereby increasing its smoothness. For example, mirror-finishing the inner surface of a pipe brings about the benefit of reducing resistance against powder or liquid that flows through the pipe and facilitating its flow.
  • Beautifully processed appearance
    Mirror polishing flattens irregularities of a workpiece, thereby increasing its smoothness. For example, mirror-finishing the inner surface of a pipe brings about the benefit of reducing resistance against powder or liquid that flows through the pipe and facilitating its flow.
  • Increase in surface smoothness
    Mirror polishing flattens irregularities of a workpiece, thereby increasing its smoothness. For example, mirror-finishing the inner surface of a pipe brings about the benefit of reducing resistance against powder or liquid that flows through the pipe and facilitating its flow.

Drawbacks of mirror finishing

One of the drawbacks of mirror finishing is its costliness, in general. Another drawback that should be paid attention to is that a workpiece surface beautifully finished just like a mirror needs to be regularly cared for because fingerprint marks, scratches, or rust can easily be noticed on the surface.

TDC’s Mirror Finishing/Mirror Polishing Services

Processing Equipment for Mirror Polishing

In addition to lapping machines, TDC has a variety of processing machines that enable comprehensive ultra-precision manufacturing.

Machine Brand Size Quantity
Lapping Machine
(Single Sided)
Mirror Polishing Machine
in-house
others
φ63in-φ12in
(Maximum Size ~ φ800 mm)
90
Lapping Machine
(Single Sided)
Mirror Polishing Machine
FLTEC φ18in
(Maximum Size ~ φ190 mm)
10
Lapping Machine
(Single Sided)
Mirror Polishing Machine
FLTEC φ18in
(Maximum Size ~ φ190 mm)
2
Lapping Machine
(Double Sided)
SPEEDFAM
others
5B~16B
(Maximum Size ~ φ300 mm)
19
CMP ENGIS JAPAN
others
φ18in~φ36in
(Maximum Size ~ φ305mm)
3

TDC’s Mirror Finishing/Polishing

TDC is capable of polishing a wide variety of materials such as metals, ceramics, crystalline materials, and resins to ultraprecision mirror finish. TDC is also capable of polishing a surface into any shape, whether it be a plane surface, a curved surface, or inner or outer diameter of a cylinder, with the surface roughness (Ra) of 1 nm or less. Furthermore, TDC has its original polishing method that can satisfy other highly precise processing requirements such as “100-nm parallelism,” “30-nm flatness,” “±100-nm dimensional accuracy,” “±3 arcseconds,” and “50-nm sphericity” while satisfying the surface roughness of Ra 1 nm or less.


*Results of surface roughness and surface roughness of each material are introduced on the “What is Surface Roughness” page.

Please feel free to contact us if you have any questions and inquiries.

Feel free to contact us for any inquires.