Method diamond tool orientation

Currently, there are three main ways crystal orientation: artificial visual crystal orientation, X-ray laser crystal orientation and crystal orientation.
Artificial visual crystal orientation
The method is based on the natural crystal external geometry, surface growth, corrosion characteristics of each crystal face relationship between the geometry, by

virtue of the operator-term work experience, by observation and experiment made rough crystal orientation. The method is simple, easy, do not need to borrow

Aid equipment, but the directional accuracy of the results is poor, the operator experience requirements, and for processed and lost natural crystal crystal

characteristics of the cutting tools can no longer carry out artificial visual orientation.
Laser crystal orientation
Laser crystal orientation is preferably coherent laser beam to the surface of the Diamond blade crystal in different directions present on the surface of the crystal growth

process in the formation of crystal planes of regular shape and microscopic pit pattern formed on the screen is reflected to the characteristics diffracted light

image. But the real

On occasion due to outside interference factors, the natural formation of rules and microscopic crystal faces crystal grain pits are often not obvious or impossible to

observe. Therefore, in this crystal orientation prior to artificial erosion through proper to form characteristic morphology.
X-ray crystal orientation
Since the X-ray wavelength of the lattice constant, when the X-ray crystal or through the surface is reflected back from the crystal, the diffraction occurs. This

principle has been developed using a dedicated X-ray crystal orientation instrument. This method of high accuracy crystal orientation, but due to X-rays

Human body has certain hazards, the need to focus on when in use to protect workers.
Crystal diamond tool to select
Diamond anisotropy, so not only the crystal surface hardness, wear resistance difference is the same crystal plane of the wear is different in different directions. If

the inappropriate choice of crystal orientation, even choosing the right crystal surface, grinding efficiency will be greatly reduced. The same time as anti-diamond

crystals

Compressive strength than the tensile strength is 5 to 7 times, so the grinding process to select the grindability of the crystal plane orientation, while cutting edge

facing the grinding wheel speed to the positive direction (i.e., taking the inverse mill) to ensure grinding efficiency and reduce the extent of cutting edge micro-

cleavage.
Diamond grinding tool breakage
Diamond tool wear mechanism is more complex, can be divided into macro-and micro-abrasion wear, the former mainly mechanical wear, which is dominated by thermal

chemical wear. Diamond grinding tool breakage common form for the former flank wear, flank wear and edge chipping. In the single-crystal

Diamond tool sharpening process, requires the wear to the grinding tool to meet the requirements, but if it produces unwanted wear sharpening may damage the already

good before the flank. The edge crack (ie chipping) is on the edge of the local stress exceeds the diamond tool

Occurs when the capacity is generally a diamond crystal (111) cleavage plane of the micro-damage caused. In the ultra-precision machining, diamond tool edge radius of

the cutting edge is relatively small, which itself is hard and brittle materials, and because of its anisotropy and (111)

Surface prone to cleavage, with vibration and grit grinding wheel cutting edge of the tool impact effect, it is often accompanied produce chipping.