In the past two years, Tianjin No. 2 Machine Tool Co., Ltd., with a history of more than 50 years, has fully utilized its talents and technology advantages, and has taken “special, large, refined and rare†as the main direction, and achieved results in the development of major equipment. Heavy-duty CNC precision vertical universal grinding machines and large-scale drilling and milling composite machine tools are among the masterpieces. These two series of new products not only fill the domestic gap with the "first set", but also approach the international advanced level with high-speed, high-efficiency and high-precision comprehensive quality.
A 3.15m heavy-duty CNC precision vertical universal grinder has “eight big†innovations: modular design and high-rigidity box structure ensure high geometric accuracy of the machine and high static stiffness of the machine. Two high-precision, high-rigidity spindles for grinding and importing rolling bearings, with dynamic balancing device to ensure high grinding precision and low surface roughness; equipped with precision turntable, radial imported P4 double row cylindrical roller The sub-bearing is centered, and the axial direction adopts static pressure unloading and plasticizing guide rail. On the basis of stable operation, high precision, good rigidity and good vibration resistance are achieved. The coordinate axis adopts the principle of gravity center drive, which greatly improves the quality of grinding work. And machine tool life; equipped with a variety of wheel dresser, can be applied to the grinding wheel straight line trimming, grinding wheel arc dressing and special double track wheel dressing; the coordinate axis uses positive pressure organ type telescopic protection, effectively preventing water mist and dust Erosion of the lead screw; equipped with a large flow coolant system to facilitate the cooling of the workpiece to achieve the final machining accuracy; CNC system with handheld pulse unit The operation is safe and convenient. Recently, the large-diameter closed static pressure turntable has been successfully developed, and its rotation accuracy is improved to radial runout ≤1μm, axial turbulence ≤1μm, and it can be placed on a vertical grinding machine to make the surface roughness of the machined workpiece. It has been included in the Tianjin Science and Technology Innovation Special Fund Project. With the acceleration of serialization and industrialization, it will become the first choice for domestic wind power transformer bearings, yaw bearings, large gears, large flanges, outer rings, inner holes, end faces and channel grinding.
The advent of drilling and milling composite machine tools, the processing of large flange parts and slewing bearing parts of φ2500 ~ φ6000mm, from the rocker drill or program control mode into the automatic CNC mode. The machine adopts a modular design with double machining heads, and each machining spindle has three coordinate axes of x, y and z, which can realize true double-head machining at the same time, with high production efficiency; x and y axis can be inserted The hole position is complemented and equipped with a static pressure turntable that can perform accurate indexing at any angle, and the positioning efficiency is high; the x, y, and z axes are driven by linear rolling guides, ball screws and servo motors, and the feed speed is high. Up to 10m/min; using a new machine clamped carbide high-pressure internal cooling high-speed drill bit, drilling a hole with a diameter of 30mm and a depth of 200mm on the alloy steel can be completed in 0.42~0.79min. If the machine tool is quickly positioned, the time saved by all machining automation will be more than 10 times that of the ordinary rocker drill; the spindle is equipped with a tool magazine, and the turntable has a composite function, which can be changed by the automatic tool change function and by changing the state of the workbench. Complete machining of turning, drilling, boring and milling. According to reports, the new product can solve many problems in the processing of large flange parts and slewing parts required in wind power, ships, pipelines, bearings and other fields in China. It has been well received by users and has broad market prospects.
The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope
1. Make the object to be observed form a thin film, which is easy to transmit light and easy to observe;2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.
The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.
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