There are many kinds of roughness sample plate, there are special for shot blasting and sand blasting, there are also shot blasting sand blasting dual-purpose type. The picture is a sample plate picture, the specific also according to the requirements to determine. General shot blasting surface roughness on the use of specialized roughness meter to measure also called the anchor gauge, range than the ordinary machining of the special roughness meter is much larger, and the two can not be universal.
Microscope comparison method, Ra0.32; the measured surface and surface roughness comparison sample block close together, with a comparative microscope to observe the two magnified surface, to sample the roughness on the working surface as a standard, observe and compare the measured surface whether to achieve the surface roughness of the corresponding sample block; thus determining the measured surface roughness in line with the provisions. This method can not measure the roughness parameter value.
Expanded Information:
Blasted glass beads product characteristics:
1, soft and hard - the use of high-quality materials, namely, a certain degree of mechanical strength, the sio2 content of more than or equal to 68 ﹪, hardness up to 6
1, soft and hard - the use of high-quality materials, that is, a certain mechanical strength, sio2 content greater than or equal to 68%, hardness up to 6-7 Mohs, but also have enough flexibility, can be repeated several times, not easy to break, the same effect of the spray device than the ordinary service life of the glass beads longer than 3 times.
2, good uniformity - rounding rate greater than or equal to 80 ﹪, uniform particle size, after spraying the sandblasting device to maintain uniformity in all parts of the brightness factor, not easy to leave watermarks.
3, irreplaceable - shot blasting glass beads as an abrasive material than any other abrasive material has the following advantages: in addition to metal abrasive materials, than any other media to use a long time, made of non-alkaline soda-lime glass material with good chemical stability, will not contaminate the processing of the metal to accelerate the cleanup, while maintaining the processing of the original object! Precision
Baidu Encyclopedia-Surface Blasting Treatment