The powder metallurgy parts used in household appliances, power tools and sewing machines are very common. If metallurgy products can be popularized in refrigerators, washing machine fans, and sewing machines, the technical and economic benefits will be very huge.
Household refrigerators, air conditioners, electric fans, ventilators, washing machines, vacuum cleaners, food processors, electric shavers, hair dryers, electric massagers, tape recorders, video recorders, composite audio, etc., are the most widely used in household appliances and are indispensable The powder metallurgy parts are sintered metal (sintering process in powder metallurgy）oil-containing bearings. We will introduce the powder metallurgy structural parts used in several representative products such as washing machines, refrigeration compressors of household refrigerators, and electric fans.
In the early 1970s, the General Electric Company of the United States changed the two cutting steel parts in the transmission of the “stirring” automatic washing machine into redesigned powder metallurgy parts. These two parts are the locking tube and the spin tube.
The redesigned powder metallurgy spin tube is a single part. Although the total wall thickness at the lower end is reduced, it has a sufficiently high practical strength and is easy to manufacture.
The total wall thickness of the spin tube is reduced, so that the wall thickness of the locked tube is increased, which makes the powder metallurgy locked tube have the required practical strength.
A single powder metallurgy spin tube is made of powder metallurgy steel F-0008-20, with a density of 5.9-6.1 per square centimeter. Powder metallurgy steel of this density has a sufficiently high structural strength. The inherent feature of the powder metallurgy process is that the parts produced have the required size and roughness accuracy of the bearing surface. Colleagues can provide appropriate structural support strength for the drive shaft and the locking tube. The only subsequent processing is to cut a small chamfer on the large outer diameter.
The powder metallurgy lock parts tube roommate is made of powder metallurgy copper steel FC-0205-40. The material density is 6.8-7.2g per square centimeter. The addition of copper and the density is higher than that of the spin tube in order to make the notch area have sufficiently high impact strength And has abrasion resistance to the spring clutch. The technological characteristics of powder metallurgy are precise dimensional tolerances, smooth surface of parts, and flange incisions can be formed by pressing without subsequent processing.
The redesigned powder metallurgy lock tube and spin tube save more than 250,000 US dollars annually, which significantly improves the quality level of the transmission.
Post time: Dec-31-2021