2 has a very good economic benefit Guangdong Senior Technical School 516100 Wu Chaoyu ceramic bond in the CBN abrasives binder system ratio, has risen to about 5, the research and development of ceramic bond is very important in industrial developed countries In recent years, although the application of ceramic CBN grinding wheel has been greatly expanded, the research and development of ceramic bonding agent has been slow, and most of them are low-melting such as boron glass alkali metal potassium sodium as main oxide by ordinary abrasive ceramic bonding agent. The 08 test piece made of this ceramic bond was observed under a microscope, and it was found that there were many bubbles around the CBN abrasive grains, which resulted in low binding force of the bonding agent to the abrasive grains. Therefore, the grinding wheel was efficiently used in the 6-wheel. When the CBN abrasive particles are prematurely detached.
In order to eliminate the (3) bubble around the abrasive particles and the holding force of the ceramic binder on the CBN abrasive particles, we carried out the composition test of the binder composition to introduce the following enthalpy and free energy, the free energy of U20 is much larger than Na20, heart 0, and In contrast, 0 is also difficult to separate, therefore, the conventional formula is the first group, the specific composition of the proud people 12,3,65 of SiO 2, and K20, lB, Na20, l鲂 B2ft; to join 2, the formula is the second group, the specific composition is proud of Al2,3,l. The first group of formula ceramic bond CBN test block, CBN abrasive particles around the bubble, and the second group of bubbles Very few. This is mainly because the Na20 in the first group of formulas emits free oxygen at the firing temperature and the bubbles generated by the chemical reaction with the 08 abrasive are not easily escaped. Therefore, there are many bubbles around the 08 abrasive grains. The ceramic bond CBN test strip is subjected to the flexural strength test. The first group is 40 MPa, the second group is additionally, the presence of U20 makes the thermal expansion coefficient of the binder and CBN closer; 0 decreases the glass when melting the glass. The tendency to increase the thermal stability and mechanical strength of the glass chemical stability. The mechanism of these factors on the role of Li20 in ceramic bond CBN grinding wheel has yet to be improved. Zhengzhou Institute of Abrasives Grinding and Grinding 450,07 Zhang Xiaofu hydraulic nut is used for tool clamping of tool clamping of various machine tools in our factory. The hydraulic nut is based on the principle that the piston area of ​​the cylinder is different in the hydraulic transmission, and the force increase ratio is generated to clamp the tool. The structure consists of three sets of compression nuts of the cylinder block and 90 sets of pistons filled with liquid plastic filled with radial cylinders in the cylinder and absolute pressure cylinders in the cylinder. When the feA is used, the hydraulic nut is installed according to the position. On the machine tool shaft, use a hex wrench to screw the compression nut, the pressure is transmitted to the piston through the steel ball, the piston advances in the radial cylinder in the cylinder, and the pressure is transmitted to the 1 hydraulic nut structure liquid plastic, liquid The plastic conveys the pressure to the pressure plate in the axial cylinder of the cylinder. Obviously, the force-increasing ratio is the ratio of the force receiving area of ​​the pressure plate to the force transmission area of ​​one piston. Therefore, the pressure plate is pressed against the pressure. The pressure at the end face of the cutter is quite large. For the tool clamping device for different purposes, the cylinder-to-diameter ratio of the radial cylinder to the axial cylinder in the cylinder can be changed in the design, so that different force-increasing ratios can be obtained and the tool can be obtained. The different pressing force bars rise with the tightening of the compression nut, and the clamp is clamped.
The liquid plastic consists of calcium stearate and a suitable amount of vacuum oil of a polyvinyl chloride resin of a formula weight ratio of 8 butyl benzoate. When making liquid plastic, first mix and mix the butyl benzoate with the vacuum oil, then mix the polyvinyl chloride resin with calcium stearate, and finally mix the above two kinds of mixture, and place the mixture for the day. Installed in a container, the temperature of the glycerin heated in the glycerin tank is controlled at about 150, and the mixture is continuously stirred to form a semi-transparent semi-liquid, and the heat is maintained at 2, so that the air nut can be floated and the hydraulic nut can be preheated to about 13 after pouring, after pouring. The liquid plastic is naturally cooled in the hydraulic nut. The liquid plastic in the hydraulic nut can also be replaced by butter, but the effect is worse than that of the liquid plastic.
The hydraulic nut has high clamping precision and good stability, and can be modified by the thread on the original cutter shaft. It is easy to load and unload, easy to operate, and can also be used for clamping some workpieces. Qinghai No. 1 Machine Tool Factory 810021 Gao Jun Zhang Zhenhao
Ball lenses Spherical ball lenses are commonly used for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, and fiber-to-detector coupling. Larger spheres are easier to handle and ease the sensitivity of translational alignment. However, smaller spheres fit into smaller packages.Â
Sapphire and Ruby ball lenses are both made from Al203. Ruby or Ruby-Doped sapphire owes its red color to traces of chromium oxide (chromium content for ruby balls is typically >0.5%). While their physical and chemical properties are basically the same, their optical properties are somewhat different. Sapphire has superior optical transmission qualities. Ruby Balls are easier to see and therefore easier to handle for physical applications.
    
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Specification of our ball lens:
*Material:BK7 or other optical glasses,optical crystal materials
*Diameter:1mm - 40mm Â
*Dimension Tolerance:+/-0.005mm Â
*Surface Quality:40-20Â Â
*Sphericity:0.005mm
*Coating:optional
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