Application of laser welding in powder metallurgy parts.

Due to the powder metallurgical raw materials of special properties and manufacturing process. In some areas are widely used and gradually replaced the traditional metallurgical materials, and now we consider the most is connection between the powder metallurgy parts and other parts. In the 1980s before we apply the most extensive is brazing and projection welding, but the combination of degree is not high, adapt to the high temperature high strength of occasions, so powder metallurgy parts due to the problem of welding eat cold shoulder in many industries.

With the development of technology, in the beginning of the end of 80 in the field of powder metallurgy parts welding have new laser welding join, many advantages of suddenly, also acts as a foil to the US powder metallurgy advantages. Laser welding and traditional welding methods are: depth to width ratio and narrow weld and weld with high strength, small heat affected zone, welding deformation small, effective improve the productivity also realize the welding process automation, and many other advantages.

Now technology is so advanced, each industry has a breakthrough in the field, laser welding and cutting effectively solves the problems we powder metallurgy parts and other parts are connected, I believe that in the near future, we powder metallurgy parts welding project will enter a new breakthrough in the field.

ZCMIM Shanghai exhibition scope of work

ZCMIM, Hi I wish you have a good time, every week on Monday, I believe that most companies will be open early, summed up the work of the week, and this week's work, ZCMIM is the same. This week we have a group discussion about some of the work arrangements for the Shanghai show.

Because the ZCMIM company until April 27 in Shanghai began a 3 day exhibition, recently in preparation for the exhibition to use things such as pictures, posters, name card etc.. There are some mail to be sent with the intention of customers.

In Shenzhen MIM in this industry, there are still some people who know that ZCMIM, but if want to more extended range of customers, it must be to go to the show and ZCMIM is generally take the foreign trade market, relative to the exhibition, will can better reflect the advantage of ZCMIM and attract customers eye ball!

We look forward to your arrival, in April address: Shanghai Everbright Convention & Exhibition Center

Introduction of metal injection molding (MIM) technology

Metal injection molding technology is a set of plastic forming process science, polymer chemistry, powder metallurgy and metal material science and other disciplines mutual infiltration and cross product, using the mold can be injection molded blank and by sintering rapid manufacturing structure parts with high density, high precision and 3D complex shape, can fast accurate will design thought of as having a certain structural and functional properties of the product and can directly produce a large quantity of parts, manufacturing technology industry a new change.

This technology not only has less conventional powder metallurgy process, without cutting or less cutting and economic advantages, and to overcome the traditional powder metallurgy products low density, inhomogeneous materials, low mechanical performance, not easy to forming thin-walled and complicated structure of the shortcomings, particularly suited to mass production of small and complex and has special requirements of metal parts.

Introduction of AIM technology and development status of AIM production equipment

MIM and CIM are the two major branches of powder injection molding process. The MIM is a branch of the earliest development is the most mature, known as 21 of the world's most popular parts forming technology, it did not live up to such an honor, the industry continued to develop and grow, and has the special metal injection molding equipment. Now powder injection molding process one of the third major branches: AIM, that is, aluminum alloy injection molding.

近年来，随着金属注射成形工艺的不断成熟和普及，人们也越来越关注铝合金这种具有优异功能的特殊复合金属，因铝合金种类繁多，性质差异较大，表面极易被氧化的特点，其在注射成形方面与普通金属或合金要求是不同的，于是才会出现专门的AIM——铝合金注射成形。

In recent years, with the metal injection moulding technology continues to mature and popular, people pay more and more attention to the aluminum alloy which has excellent function of special composite metal, because there are many different kinds of aluminum alloy, nature difference is larger, the surface is easily oxidized characteristic and its the injection forming and ordinary metal or alloy is different, so will appear special aim of aluminum alloy injection forming.

任何一个工艺要想全面发展，形成一种产业，必须要通过生产设备的改进和升级来为企业提高生产效率，AIM也不例外，最初它是没有专用的设备的，传统粉末冶金和注塑行业通用生产设备以及金属注射成形专用设备的都曾被用于该工艺中。但是它有其独特的原料特点，那些非专用生产设备都无法很好满足其正常生产需要，即使勉强可以使用制品的质量也大打折扣。

Any process to comprehensive development, the formation of an industry, must to the improvement and upgrading of production equipment for enterprises to improve production efficiency, the aim is no exception. Originally, it was no special equipment and traditional powder metallurgy and injection molding industry, general equipment manufacturing and gold belongs to special equipment for injection molding have been used in the process. But it has its unique characteristics of raw materials, those non dedicated production equipment can not be very good to meet its normal production needs, even if the product can be used to the quality of the product is also greatly reduced.

Solutions for product appearance problems

Generally in the MIM process, by powder injection molding products, usually have the appearance of some problems, which scratched, gap, fuzz, dust, pinhole, hole Phi Feng the product appearance, these problems arise, the factory should give what solutions? How to rework it?

If scratched, gap, fuzz, dust, pinhole, Phi front similar to the appearance of the problem, according to the product of the seriousness of the situation to verify that the project is responsible for people on the evaluation, verification if mild and not to affect the appearance of are generally through, if very serious, some of which can rework, or rework not only abandoned.

And one point to note is that if there is a problem with the appearance of the product, we must negotiate with the customer, if look bad product accounts for a large proportion, it is in these metal parts production in which a link need improvement and adjustment. Above is the Shenzhen ZCMIM powder injection molding company summarized some of the solution for the appearance! You are welcome to visit our factory at any time!

The prospect and analysis of the development of MIM industry in Europe and America

With the development of MIM research, and the development of new binder, flour milling technology and the continuous progress of the process, to the beginning of the 90's has been realized. After 20 years of efforts, the MIM has become the powder metallurgy, the field is developing rapidly, the most promising a new near net shape technology, known as "the most popular metal parts forming technology" one of.

After nearly twenty years of development, in 2003 the global MIM product market value reached about $1 billion.

By geographical division, the United States accounted for 55%, followed by Europe and japan. Currently a total of around the world more than 500 companies engaged in metal injection molding products production and sales, in addition to about 40 MIM powder supplier, 20 of MIM feedstock supplier.

According to statistics, the global MIM industry's forming capacity has more than 700 sets of injection molding machine, 500 furnaces, 300 sets of mixing machine.

Marko Maetzig detailed analysis of the European situation in Europe there are 120 companies and 30 research institutions engaged in the work of MIM, with 250 sets of injection molding machine, the annual consumption of 1100 tons of feed.

Europe's MIM 38% from the traditional ceramic industry, 27% from the plastic industry, 8% from the traditional powder metallurgy and metal cutting processing industry, 5% from the foundry industry, and another 14% for the newly formed company.

Japan now has a total of 20 ~ 30 MIM company, Japan's MIM market in recent years, showing a steady upward trend. Although in 2001 than in 2000 declined, but overall, its total sales showed a steady growth trend.

Mechanical blasting program introduction

The shot is to use high-speed rotation of the impeller to small steel shot or small iron balls thrown out high-speed hit parts of the surface, so it can be removed parts of the surface of the oxide layer. General blasting for irregular shape, several polishing head around with high efficiency and low pollution.

Repair, shipbuilding, blasting, blasting is widely used. But either shot or grit blasting, are used in the form of compressed air. Of course not shot on high speed rotation of the impeller can not be. In repair, shipbuilding industry in general, shot (shot) use in steel plate pre - treatment (before application of paint and rust); (repair, shipbuilding industry is iron ore) and more sand in forming the ship or segment, the role is the plate on the old paint and rust removing and re painting. In the repair, shipbuilding industry, the main role is to increase the blasting and blasting plate coating paint adhesion.

In fact, casting cleaning member is not only with the shot, to the large general first roller sand cleaning, is the casting of the riser after resection of put in the drum roll, composed of parts in the drum collide with each other, the sand surface most first clear off another shot or shot peening.

About 0.1 ~ 2.0 or most ~ 3.0 in shot blasting is used motor drives the impeller to rotate by the centrifugal force effect, the diameter of balls (cast pill \ cut pill \ stainless steel balls to be thrown to the workpiece surface and the workpiece surface to achieve certain manufacture in a rough degree, so that the workpiece become beautiful, or changing the workpiece welding stress compressive stress and improve workpiece service life. Almost used in mechanical field, shipbuilding and ship repairing automobile parts for aircraft components guns tank surface bridge steel structure of glass steel pipeline and so on. Blasting (pill) is to use compressed air as a driving force for the diameter in the 40-120 sand shot to the workpiece surface and the workpiece to achieve the same effect.

Different pellet size, to achieve the treatment effect is not the same. Key proposed: shot peening can also play a role in strengthening. Now domestic equipment into the a misunderstanding, think only shot in order to achieve the aim to strengthen the. \ USA Japan enterprise for enhanced is shotblasting and! Each have each advantage. Than as a tower of ivory gear such artifacts, blasting the pill angle can not be changed, can only change with frequency conversion speed. But it is processing a large amount of, speed, and shot peening is just on the contrary, blasting effect is not shot peening effect.