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2022-08-01
3. When the rack is seriously worn, parts such as new chains should be replaced to ensure good results. Never use old and new products together. This results in increased wear. Fourth, the rack should be lubricated in time to make the chain work more smoothly and quickly and reduce wear and tear. This is also a matter of daily maintenance.There is also Gear Cutting, the role of cutting in gear processing, the key is to find a way to replace cooling and lubrication. At present, there are two successful dry cutting methods: high-speed dry cutting and low-temperature cold air cutting.
So we now introduce a term - water-soluble quenching medium, do you know? Many times, there will be small cracks in the part of the rack, how is it caused? In fact, the main reason for quenching cracking of Steel Parts is that when the steel begins to undergo martensitic transformation (Ms point) and the cooling is too fast in the following temperature range, cracks will appear. For this reason, the goal of research and development of water-soluble quenching media is to reduce the low-temperature cooling rate of water. Considering that the Ms point of most structural steels is around 300 ℃ during cooling, the cooling characteristics of the quenching liquid are usually expressed by the cooling rate of the water-soluble quenching liquid when the workpiece is cooled to 300 ℃. The 300°C cooling rate of the water-soluble quenching medium can be used to grade the medium for the choice of heat treatment workers. There are many kinds of water-soluble quenching media, among which the cooling characteristics of PAG media are adjustable, and the concentration measurement and control is relatively easy. It is suitable not only for the overall quenching of the rack, but also for various induction heating quenching, and can be used stably for a long time. It is economical and convenient, so it is widely welcomed, and has become a water-soluble quenching medium widely used in the heat treatment industry at home and abroad.
What is the main reference for the selection of racks?
(1) Whether the gear's runout, full tooth depth, common normal, and tooth direction are qualified, whether the one-tooth swing and the pitch error are out of tolerance.
(2) Whether the installation distance of the gear and rack after installation is appropriate.
(3) The meshing clearance of the rack and gear should be 0.25*modulus.
(4) Whether the full tooth depth, runout, common normal, and especially the tooth direction of the rack are qualified.
Racks are also divided into spur racks and helical racks, which are used in pairs with spur and helical spur gears respectively; the tooth profile of the rack is straight rather than involute (flat for the tooth surface) , which is equivalent to an infinite cylindrical gear with an indexing circle radius
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Tel:86--15013568605
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Mobile Phone:+8615013568605
Email:zou@hycmetal.com
Address:Shop 26-27, Commercial Street, Niutou Village, Niushan Village Committee, Dongcheng District, Dongguan, Guangdong
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.