Heat treatment method of sprocket
1. Medium and medium carbon alloy steel are usually used for surface hardening. After surface hardening, the hardness of the tooth surface is generally 40-55HRC. It has the characteristics of anti-fatigue pitting, strong adhesion resistance, and good wear resistance. As the bare core will eventually harden, the sprocket still has enough toughness to withstand small impact loads.
2. Carburizing and quenching are commonly used for low-carbon steel and all steel. After carburizing and quenching, the hardness of the tooth surface can reach 56-62hrc, while the toughness of the tooth core is still high. After carburizing and hardening, the gear teeth will deform. Good running in shall be carried out.
3. Nitriding is a kind of surface chemical heat treatment. No other heat treatment is needed after nitriding, and the hardness of the tooth surface can reach 700~900 hv. Because nitrided gears have the characteristics of high hardness, low processing temperature, and small deformation, they are suitable for gears that are difficult to grind and are commonly used for nitrided steels containing chromium, copper, lead, and other alloy elements.
4. Medium carbon steel and medium carbon alloy steel are generally quenched and tempered, and the surface hardness of the gear after quenching and tempering is 220 × 280 HBS; the gear has low hardness and can be trimmed after heat treatment.
5. Normalizing can eliminate internal stress and refined grains and improve mechanical and cutting properties. Gears with low mechanical strength requirements can be standardized with medium carbon steel, and large-diameter gears can be normalized with cast steel.
Cutting process of chain wheel manufacturer
Forming broaching (also known as circular broaching and forming single cycle method) is a variation of cutting methods. The workpiece does not feed slowly at the tooth height but advances rapidly to the full tooth height (or the head is close to the workpiece). The cutter head of cutter head is arranged in micro increments in the diameter direction, just like the cutter teeth of the broach. The sprocket manufacturer's cutter head rotates one turn to cut the groove. The tooth will separate from the notch in the head and then cut another tooth slot. This cycle will continue until all slots are cut. This method finishes giant gears, the tooth profile is the cutter section, and a unique double-sided circular broach head is used.
The rough cutting and acceptable drawing method of the sprocket manufacturer is also a variation of the cutting method. When machining bevel gear, big gear, rough cutting, and fine cutting can also be completed several times on solid blank. The rough cutting is similar to the rough cutting of the cutting method, and the finish cutting is identical to the finish machining of the circular drawing method. This cutting method can be used in the gear milling machine designed according to the principle of profiling method or in the machine designed according to the gear hobbing method.
The spiral forming method of chain wheel manufacturers is developed based on the profiling method. It combines the advantages of half hobbing, circular drawing, rough cutting, and delicate drawing. It is an ideal cutting method for machining spiral bevel gears and hypoid bevel gears. It is suitable for machining giant gears of gear pairs with transmission ratios greater than 2.5. In short, the cutter head not only rotates but also reciprocates forward. The tool head adopts a double-sided circular broach head.
Sprocket quality testing
In each work process and after the final manufacture of the product, all items will be thoroughly inspected and tested to ensure the best product quality on the market.
Multiple processing methods
other sprockets
We also provide various chains
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