Comparison of disadvantages of electroplated CBN grinding wheel and sintered CBN grinding wheel
CBN grinding wheel is CBN (cubic boron nitride) abrasive as raw material, used for grinding, polishing, grinding tools.Compared with diamond, it is a low cost method of grinding; Compared to traditional grinding material properties, it performs very well, especially when grinding cemented carbide.
CBN grinding wheel,bond abrasives,coated abrasives,China manufacturer
Type of grinding wheel
(1) Electroplating CBN grinding wheel.In the steel matrix electroplating a layer of CBN material made of steel because of its characteristics is easier to electroplate, so it becomes a suitable matrix material, mainly used in geometric tolerance is not very strict on the rough machining. Usually not trimmed, is used until the end of life. As the grinding wheel wears, the grinded particles gradually flatten out, and towards the end of its life, the grinding force required increases and the surface roughness quality decreases.
Its advantages are as follows:
① The initial cost is lower than that of multi-layer CBN grinding wheels (but the average cost of multi-layer grinding wheels is lower).
② The machine tool can be designed simply, without dresser, balancer, and without the need to provide different grinding wheel speed drive.
(3) some of the last process of rough machining can be omitted, directly can be grinding wheel grinding.
④ Because of the high speed of the grinding wheel, the grinding speed is higher than the efficiency of the traditional grinding wheel.
⑤ The substrate of the grinding wheel can be reused many times, thus reducing the cost.
But it also has some shortcomings: (1) the life of the CBN grinding wheel is much shorter than many times, can not be trimmed, the ideal grinding condition is to use oil to cool, but because of the risk of health, customer acceptance is not high. ② The input cost of a single grinding wheel is high and the damage cost is high. (3) Inexperienced customers or machine tools need to be carefully adjusted in the early use to obtain good grinding effect.
(2) Multi-layer sintered CBN grinding wheel.Made of steel, iron and aluminum alloy matrix, above is inlaid with multiple layers of CBN material, usually CBN layer has 5mm thick, mainly used in high precision grinding process.
Its advantages are as follows:
① There is no need to provide different grinding wheel speed drive.
② Longer service life, can be trimmed, so it can keep the stability of grinding quality.
③ can improve the geometric accuracy, surface roughness quality and surface profile.
(4) Although the initial cost of a single grinding wheel is high, the average cost is lower than that of single-layer grinding wheel and traditional grinding wheel because of the large number of workpiece grinding.
High grinding efficiency.
The disadvantages also include the following aspects:
① It is difficult to select grinding wheel, so it takes a long time to debug the machine in the early stage. Therefore, experienced grinding wheel manufacturers need to provide technical support.
② the machine is more complex, especially strong, need dresser and balance instrument.
⑤ The parameters of machine tools and grinding wheels need to be adjusted several times in order to obtain good grinding effect.