Japan's Tungaloy has developed a round-end slot milling cutter "BBB2000" with a cBN (cubic boron nitride) sintered body for cutting edges and has begun sales (figure). The hemispherical cutting edge at the front end of the product is made entirely of cBN sintered body. It can directly cut the hardened mold after quenching, which saves the finishing process of the post-process. The price is 25,200 to 260,250 yen (including tax).
This product is suitable for the processing of molds required for injection molding of mobile phone resin casings. At present, the processing method of the mold is to use a super-hard alloy slot milling cutter for cutting when it is still "soft", and then quenching it in order to improve wear resistance. However, due to the influence of the heat treatment, a slight dimensional error occurs, and therefore, a superhard alloy tool is used for finishing.
In contrast, the new round-end slot milling cutter can directly cut hardened and hardened molds from the beginning. Since no heat treatment is required after cutting, no dimensional error occurs. Therefore, the finishing process can be eliminated, the corresponding cost can be reduced, and the delivery time can be shortened. In addition, the product has a cutting hardness of up to 70 Rockwell hardness (HRC).
In addition, the accuracy of the cutting edge is also improved. By controlling the R precision of the cutting edge to ±5 μm, the R edge and the outer peripheral edge are eliminated, thereby achieving high-precision cutting with extremely small shape error.
As a series of products, the company has prepared four models with round head radius R of 0.3, 0.4, 0.5, and 1.0 mm. The mold shank diameter is 6mm.
product description
GFDD series of top-blow dry-type transformers with cross-flow cooling fan (hereinafter referred to as: dry-type cross-flow cooling fan) is mainly used for dry-type transformers cooling capacity, and electronic equipment, power distribution cabinets, high and low voltage switchgear forced air cooling . Dry-type transformers coupled with the fan cooling, 40 ~ 50% capacity increase can be run, thereby greatly increasing the carrying capacity of dry-type transformers and prolong the service life of dry-type transformers, is widely used by domestic and foreign manufacturers the most cost-effective the way.
The product strictly according to JB / T8971-1999 "dry-type transformers with cross-flow cooling fan" design and production of motor set, the rotor core using high-quality cold-rolled silicon steel; low noise bearings; impeller using aluminum alloy surface electrophoresis, and then through the fine Dynamic balance adjustment; left and right end plate made of stainless steel stamping, into the wind board, the wind board and the wind deflector aluminum alloy buckle combination; the entire fan structure is reasonable, handsome in appearance, with air volume, noise, temperature rise Low, long life, stable operation, easy installation and so on.
working principle:
The series of cooling fan for dry-type transformers, fans placed on both sides of the lower part of the transformer coil, the wind blowing directly into the transformer coil high and low pressure cooling air duct, cooling effect is obvious, can protect the normal operation of the transformer and extend its service life (Fan open, stop and over-temperature alarm transformer, over-temperature trip and other functions have temperature control device to provide).
Cross Flow Fan,Cross Flow Blower Fan,Small Cross Flow Fan,Mini Cross Flow Fan
Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com