福建Application of powder metallurgy gear in watches

There will be heavy rain in many urban areas in Jiangsu Province from tonight to tomorrow, and there are too many unsafe factors when traveling. For the company's staff, they will still stick to their jobs in this dangerous weather and have time to solve customer problems.

Yesterday morning, I received a request from a watch manufacturer in Shanghai that a P/M gear needs to be developed. Through customer drawing analysis, the video conference decided to leave for the customer company this morning to make a preliminary understanding. We can just observe the working environment of powder metallurgy gear and the working relationship between the matched parts. Powder metallurgy has a wide range of applications, ranging from the gears of automobile engines to a few millimeters of small gears in watches. When we see such small gears, we can start from our own interests, save some expenses for customers on molds, and design them into more than one the first mock examination. Through this time, President Wang of Shanghai Watch Factory highly recognized the working spirit and technology of Dongmu people, which is convenient for future cooperation.

Summing up why powder metallurgy MIM technology should be used for such gears*** The method is to use MIM powder metallurgy injection molding technology, because MIM technology has the following advantages

1. High efficiency, good at mass production of batch parts

MIM technology uses molds. Because of the high degree of production automation, its service life is equivalent to that of engineering plastic injection molding tools. Because of the use of metal dies, MIM is suitable for mass production of parts.

2. More refined parts

Alloying has good flexibility, wide application range of materials, the density of products reaches 95% - 99%, the internal organization is uniform, without internal stress and segregation, the surface finish is good, the precision is high, and the typical tolerance is ± 0.05mm.

3. Substantial energy and material conservation

MIM can use almost all metal materials. Considering the economy, the main application materials include iron based, nickel based, copper based, titanium based metals or alloys. Generally, the utilization rate of metal processing and molding is relatively low. For example, the utilization rate of raw materials for the metal shell of LeTV MAX mobile phone is less than 10%, and most of the aluminum alloys become debris. MIM can greatly improve the utilization rate of raw materials, which is 100% theoretically.

4. Structural parts with highly complex structure can be formed

Generally, the tolerance accuracy of ± 0.5% can be achieved with MIM, and higher dimensional accuracy can be achieved with other processing methods. Basically, all structures that can be realized by injection mold can be applied to MIM.

5. Environmental protection and safety

It is pollution-free and can realize continuous mass clean production. It is a near net forming technology and can effectively avoid material waste.

6. More material choices

Most metal materials can be used in MIM. In consideration of economy, the main application materials include iron base, nickel base, low alloy, copper base, high-speed steel, stainless steel, gram valve alloy, hard alloy and titanium base metal.

At the same time, the company has PM and MIM industries and enterprises with a certain scale. MIM combines the advantages of powder metallurgy and plastic injection molding technologies and breaks through the limitations of traditional metal powder molding process on product shape. MIM can burn dense mechanical parts with good mechanical properties and surface quality by taking advantage of metal powder technology. At the same time, plastic injection molding technology can be used to produce many parts with complex shape features in large quantities and efficiently. For example, small planetary gears used in watches and small motors. As an injection molding technology for manufacturing high-quality precision parts, MIM technology has incomparable advantages over conventional powder metallurgy machining and precision casting methods. Usually, we can see the shadow of MIM technology in mobile phones, medical high-precision medical equipment and surgical tools that we use in life.