Abrasive wet cutting method generally used a grinding wheel to be cut, based on the need to cut the material, you may need to use a grinding wheel with different ingredients. The choice of the grinding wheel also subject to the influence of the material hardness and toughness. Abrasive wet cutting method
Abrasive wet cutting method generally used a grinding wheel, cutting, grinding wheel containing abrasives and adhesives. Cutting disc cutting, grinding wheel, coolant flush to prevent sample damage due to frictional heat. In addition, the cooling liquid is also cleared the cutting area of ??the chip.
Grinding wheel round choice
Based on the need to cut the material, you may need to use a grinding wheel with different ingredients. The choice of the grinding wheel also subject to the influence of the material hardness and toughness. Split ceramic or carbide materials should be chosen by the metal or Bakelite adhesive bonded diamond cutting disc.
Bakelite adhesive alumina (Al2O3) grinding wheel is a typical black metal material cutting. Cubic boron nitride (CBN) are increasingly used in higher hardness of ferrous materials cutting. Non-ferrous metal cutting should be selected by Bakelite adhesive-bonded silicon carbide (SIC) grinding wheel.
Cutting wheel design
In addition to the design of the grinding wheel, should also consider the need to consider the abrasive diamond / CBN cut the plate and SiC/Al2O3 difference between the cut piece. Abrasive high hardness and durable adhesive fixed abrasive diamond / CBN cutting wheel performance is very durable. Metal disc surrounding the sticky only a thin layer of abrasive (continuous rim). These cutting wheel is a long-term consumable cutting discs. SiC and Al2O3, other abrasive wear rate is relatively fast and relatively inexpensive. Thus, the entire body of the grinding wheel of abrasive material and a binder composition. This cutting wheel is known as the consumable cutting discs.
Diamond thin cutting discs tools in the non-ferrous metals and wear-resistant materials processing applications, have excellent adaptability.
Tool material, ultra-thin diamond cutting discis the hardest. Appropriate processing conditions, the ultra-thin diamond cutting disc than high-speed steel, carbide, ceramic and PCBN life long. It also has shortcomings, is: not generally apply to ferrous materials processing. However, in a high-speed mass production, processing materials such as aluminum and graphite, thin cutting wheel,etc., diamond thin cutting chip is often the most effective tools.
Diamond ultra-thin cutting discs tools, the user can have two options: a polycrystalline diamond thin cutting piece (PCD), a the newer chemical vapor deposition (CVD) diamond ultra-thin cutting discs.
Use performance as early as the proven
The ultra-thin cutting discs of polycrystalline diamond has a hardness, strength and abrasion resistance of the The natural diamond ultra-thin cutting discs, but not natural diamond ultra-thin cutting discs damaged sensitivity. It is in the high temperature, high pressure, by the synthetic diamond ultrathin dicing sheet particle polymerization. In the process, the form of the particles of the polycrystalline while being integrally bonded to a cemented carbide substrate, in order to improve the mechanical strength and impact resistance.
Accordance with the super-abrasive portion of said GE Company, PCD is very suitable for the high-speed cutting of aluminum, is particularly suitable to achieve good surface roughness main occasions, it also exhibits excellent performance in the processing of the high wear resistance materials. Normally, PCD recommended for cutting high silicon aluminum alloy, is also used in the processing of brass, copper, bronze, and carbide. Processes including turning, boring, profiling, grooving, milling and hole processing.
Because of the chemical interaction between the diamond ultra-thin cutting discs and iron, in general PCD does not apply to the processing of ferrous materials. However, it can deal with double metal materials processing, including a combination of aluminum and cast iron. For example: a car parts suppliers in the bimetallic cylinder block machining aluminum and cast iron, diameter 305mm knife clip-on face milling cutter, the tip arc 2.36mm, with Revised knife, cutting speed 304.8m/min feed 0.10 mm / tooth, depth of cut 5mm, processing up to 5000 cylinder block, the blade only need to translocation.
GE's application planning managers believe that the application of the PCD by the mass production of the industrial sector, mainly automotive industry increasing the aluminum processing speed driven. At the same time, vehicle manufacturers in order to reduce weight and reduce costs, is on the use of metal matrix composite material to be evaluated, but such materials must be processed with PCD. He said: "This type of material can not be used carbide tooling."
The polycrystalline production manager said, although the PCD's development achievements gives a very deep impression, but GE's super abrasive Ministry is still continuing to work, so as to further improve its abrasion resistance.