Diamond wheel structure
29 12月 2017 | 没有评论 | posted by admin | in Article
Diamond wheel structure generally consists of working layer, substrate, transition layer composed of three parts.
Working layer, also known as the diamond layer, composed of abrasive, bonding agent and filler, is the working part of the wheel. Transition layer, also known as non-diamond layer, by the binding agent, metal powder and filler, the diamond layer is firmly connected to the substrate on the part.
The base is used to receive the abrasive layer and is securely clamped to the grinder spindle with a flange during use. General metal binder products use steel, alloy steel as matrix; resin binder selection of aluminum alloy, Bakelite as the matrix. Manufactured from aluminum, steel or Bakelite, supporting the working layer and retaining chuck. Wheel forming quality is good or bad and the use of high and low precision has a great relationship with the substrate.
CBN tool gear basic knowledge
28 12月 2017 | 没有评论 | posted by admin | in Article
Gear as an important mechanical components in the transmission components, widely used in machine tools, automobiles and other industries. Commonly used steel gear made of quenched and tempered steel, hardened steel, carburized hardened steel and nitrided steel. According to the hardness to be divided, the gear tooth surface can be divided into two kinds of soft tooth surface and hardened tooth surface.
Soft tooth surface gear carrying capacity is lower, but easier to manufacture, with good running, and more for transmission size and weight without strict restrictions, and small quantities of general machinery. Hardness around HRC30.
Hardened gear gear carrying capacity is high, it is after the gear cutting, and then quenching, surface hardening or carburizing quenching to increase the hardness. However, in the heat treatment, the gear will inevitably be deformed, so after the heat treatment must be grinding, grinding or finishing, in order to eliminate the error due to deformation, improve gear accuracy. Hardness above HRC45, even up to HRC60 above.
Precautions to prevent machine rust
23 12月 2017 | 没有评论 | posted by admin | in Article
1, in order to prevent corrosion of water on the metal surface, lubricants, grease should be often used to fully lubricate the machine tool, grease the important parts of the machine.
2, accurate control of cutting fluid concentration. Prevent the concentration is too low lead to iron scrap adhesion in the machine corner, causing corrosion. When the machine stops working, rinse the surface of the machine with cutting fluid, and promptly clean up the accumulated iron filings. ?
3, after the shutdown, open the machine guard to disperse the damp air in the work area of the machine, apply a layer of waterproof grease protection on the top of the machine, and if necessary, install the exhaust fan to speed up air circulation. ?
4, in order to avoid breeding breeding bacteria, should be added or replaced cutting fluid, try to use deionized water with liquid.
5, in order to prevent the occurrence of galvanic corrosion, should be in the fixture and the table contact surface, locate the screw, tighten the bolt surface, apply a layer of waterproof grease, and should make the machine strictly grounded, only the electrical cabinet ground is not enough .
6, in order to prevent the penetration of water-soluble cutting fluid inside the machine should be made of high-quality flexible plastic seals made of fluorine. This extends the life of the machine and its components.
7, for the new machine? Cutting fluid rust, cutting fluid and the rail is formed by contact with a layer of oil film to achieve, for the new machine, cutting fluid to form the surface of the oil film is a certain time, and because the new machine It is advisable to wash the machine with 2% of cutting fluid for 2 hours. The first time after washing, the added concentration is 2% higher than the normal concentration. After a period of use, it can be adjusted back to the normal concentration.
