Types of ultra-precision machining Intensive research Optical sanding is the process of grinding the surface roughness of a workpiece to a level that allows it to be polished. Glass lenses are processed using abrasives such as aluminum oxide, SIC, and cast iron or aluminum abrasive discs. For precision grinding, a cast iron platen with correct …
Definition of grinding What is grinding? Grinding can be described as an operation to minimize the roughness of the surface of a workpiece without damaging its shape. Grinding is a kind of machining action using a grinder. The Chinese word for grinding machine is called a grinding disk in Japan, and some people call it …
Rare earth co-catalytic materials rare earth element Rare earth elements have a special outer electronic structure (4f), which acts as the central atom of the network and has a variety of coordination numbers ranging from 6 to 12. The variability of the coordination number of rare earth elements determines their “residual atomic value”. Because 4f …
Why are raw materials so important? The quality of the raw materials you use is directly related to the quality of the products you produce! Rare earth materials are not only known as “vitamins for the semiconductor industry”, but they are also used in the production of semiconductors.In different industries, the addition of just a …
Diamond grinding fluid is made of abrasive particles dispersed in media, it is a kind of lapping product with excellent chemical and mechanical properties. Widely used for grinding and precision polishing of silicon wafers, compound crystals, optical devices, liquid crystal panels, gemstones, metal workpieces and so on. Polishing & Grinding Fluid Series ◎Monocrystalline Diamond Solution …
Meta Polishing – Polishing our Meta world •Realizes ultra-precision polishing of free-form surfaces -No polishing marks under the microscope -Effectively reduces surface roughness and controls Ra value -Effectively reduces waviness (Wa) -Precisely maintains fine surface finish (PV) after polishing -Applicable to: Electroless nickel polishing, copper, aluminum, tungsten steel, die steel and other materials. Polishing, Copper, Aluminum, Tungsten Steel, Die Steel and other materials. meta polishing
Relative hardness and absolute hardness are clearly stated in textbooks. The relative hardness of minerals is divided into 10 grades. A mineral that scratches the surface of a crystal when two minerals rub against each other is less hard, meaning that the harder crystal will scratch the less hard crystal. Minerals with relative hardnesses ranging from 1 to 10 are “1 Talc, 2 Gypsum, 3 Calcite, 4 Fluorite, 5 Apatite, 6 Orthoclase, 7 Quartz, 8 Topaz, 9 Corundum, and 10 Diamond.
This set of relative hardness scales was pioneered by the mineralogist Friedrich Mohs (1773-1839), also known as Mohs, hence the name Mohs or Mohs Hardness. Mohs was born in Germany and moved to Austria in 1801 to engage in mineral identification work. Therefore, some books say that Mohs was an Austrian, while some Internet sources say that he was a German.
Dressing of grinding wheels refers to the process of using dressing tools to dress the grinding wheel to shape or to trim away the dull surface layer to restore the grinding performance and correct geometry of the working surface. Timely and correct dressing of grinding wheels and proper use of diamond dressing tools are the most important and indispensable links to improve grinding efficiency and ensure grinding quality.
With the traditional mechanical polishing method for large-area PCD products, the grinding wheel will first contact the raised part of the product due to stress deformation, resulting in a long polishing time and localized thinning of the thickness and other drawbacks. In this regard, the author designed and utilized a double rocker oscillating fixture, so that the polishing surface in the polishing process can be adapted to contact with the end face of the grinding wheel, this paper mainly describes the characteristics of this new technology and equipment and the use of the effect.
The ISO 6743 standard “Classification of lubricants, industrial lubricants and related products (Class L)” divides lubricant products into 18 groups, which are arranged according to the letters A to Z. The lubricants are classified into 18 groups. A：Total loss systems B：Mould release C：Gears D：Compressors (including refrigeration and vacuum pumps) E：Internal combustion engine F：Spindle bearings,bearings and …
