Medium frequency induction heating furnace is a kind of power supply device that change power frequency 50 HZ alternating into intermediate frequency (above 300 HZ and 20 k HZ) , rectificate the three-phase alternating current (ac) power frequency into direct current, then change direct current into adjustable intermediate frequency electric current, supply intermediate frequency alternating current flowing by the capacitor and inductor, then generate high density magnetic field lines in the induction coil, produce a lot of eddy current in the metal materials. Medium frequency induction heating furnace is widely used in drop forging production now.

In China, there is a long history of drop forging, it is a continuation of the manual workshop production way. Perhaps at the beginning of the 20th century, with the invasion of the imperialist powers and the qing dynasty's westernization movement, it gradually appears in machinery industrial production mode in railway, armaments factories, shipbuilding and other industries. The main sign of this shift is using the powerful forging capacity machines. In the 1950s, we can steel see steam hammer, electric pneumatic hammer, steam pressure hydraulic press made in  English, Japanese, German and other countries working in the factory of China.

In 1967, the first machinery industry ministry presided the nationwide "drop forging industry technology symposium", at the meeting first time speaking and recommended many European and American technology and equipments,and each of the participants get a beautifully printed, injustice to develop the foreign forging equipment atlas and visited the research progress in military colleges and universities. Despite the "cultural revolution" has already begun, people'pursuing the spirit of science and technology progress has not been fully beat, the drop forging industry was still improving in the 70 s, such as to produce the double column drop-down type hydraulic press, hydraulic die forging hammer, etc. It is a pity that these equipments did not play a much role in production, gradually withdrawn. In the 80s, after the implementation of the "reform and opening up" in our country, from quality to quantity, drop forging industry has a new development of comprehensive.

When it comes to stump grinder teeth,then we must ensure that they are sharp enough,so that it can grinde out the stump of trees easily.Removing trees will be helpful to finish the landscaping for a smooth, level area. It also helps to stop roots growing.When the stump grinder teeth are dull,the machine will not cut efficiently into the stump.This can cause damage to the stump grinder or injury to the operator. It is best to keep the teeth sharp through grinding.

Step 1: Remove Spark Plug
The best way to ensure that you are not hurt by some mysterious accident is to remove the spark plug from the stump grinder. This way, you will not need to worry about someone accidentally starting the stump grinder while you are working on the teeth. 

For large demands of drop forgings in different industries, it will be a hurry for drop forging company to reach lead time promised to customers before placing orders. So what purchasers cared about is not only price, but also lead time is also very important for them, especially for seasonal drop forgings. Take agricultural parts for example, for its worn of original parts,farmers have to purchase agricultural replacements in advance from the tillage tools dealers so that there will be no delay for next harvest. For these dealers,to maximize their profit,they will choose to  purchase drop forgings from China. Besides, they will also be concerned about the lead time, otherwise, it will bring great loss to them if drop forgings are finished beyond their estimated lead time. So today we would like to take about how to improve the lead time of drop forgings.

Both drop forging and casting process are all the metal forming process used in production of metal components for different industries.Sometimes, a metal parts can be made in casting and drop forging at the same time, but by contrast, peoper prefer drop forging process for its advantages, then why drop forging is better than casting?

Drop forgings are stronger. Casting cannot obtain the strengthening effects of hot and cold working. Drop forging surpasses casting in predictable strength properties - producing superior strength that is assured, part to part.

Drop forging refines defects from cast ingots or continuous cast bar. A casting has neither grain flow nor directional strength and the process cannot prevent formation of certain metallurgical defects. Preworking forge stock produces a grain flow oriented in directions requiring maximum strength. Dendritic structures, alloy segregation's and like imperfections are refined in drop forging.

Automotive industry covers a wide range of companies that involved in the design, manufacture, selling of automotive parts. It is estimated that there are over 20,000 parts in a car. All these components are made in different processes, like casting, forging, welding, stamping, machining, etc. So it is a large project to make a whole car.

Drop forging method is being used in the production of many spare parts for a large number of industries. Here the role of our company is to customize some main forged components for automotive industry. It takes us about 30% share to manufacture auto parts. There are two different methods to heat the materials before forging. One is to heat the material in the furnace up to a certain temperature that material could be drop forged easily. The other way is to heat with induction, which is a preferred solution for its energy and time-saving.

Drop forging products are mostly assembled in equipments when bearing strong power.So when designing drawing for metal parts,the engineer would choose drop forging process because of its good properties.We could see a lot of drop forging companies all over the world.Comparing with developed countries,people prefer to custom drop forgings in China for the high cost-effective performance.But how to custom drop forgings in China?It is really a big learning for these guys who never have such experience before.

*Firstly,you should know Chinese industrial structure.Ningbo is not only a sea port city,but also famous for its forging industry.Take Fly Drop Forge for example,we have been in forging field for more than ten years with 150 workers.Of course,there are also some other drop forging factories in Ningbo.

Now there are also lots of drop forging companies in US.However,there is no doubt that purchasing drop forgings from China will give you much competitive cost advantage.You could also see many foreign people live and work as purchasers in Ningbo,a city where Fly Drop Forge located.

Language
Language is no longer a barrier in China.20 years ago,English is listed in compulsory course by Chinese board of education.So in drop forging industry,we had tons of professional engineers speak fluent English.For better communication,we are 24 hours online to answer all the questions you need.Besides,there are also some foreign purchasers speak Chinese very well.This makes purchasing in China easier.

As a drop forging manufacturer with 15 years history,Fly company has now become a large scale leading supplier for compaines all over the world.By hardworking of all the staff,we are now cooperating with many large companies in different industries.And even now many new companies also find us to customize drop forgings for you by search engine or other B2B marketplace.So why us?Comparing with other drop forging companies,what are our advantages?

Advanced equipments and skills
*Extensive experience in preforming processes
*Material expertise with alloy steel and other steel grades
*Tight tolerance capabilities via precision equipments
*Expertise in utilizing impression-die hammer and forging press techniques for complex shaped components

Products made by drop forging process will be stronger, less or no machining, less defects. So it is widely used for agricultural machinery, mining machinery, oilfield industry, etc. Then you may ask since there are so many advantages, can i make all the metal products in drop forging process? As we always meet quality problems when making our products with casting process, which make us rather confused. The answer is of course not. Now we will discuss what products can be drop forged?

Process:Drop forging is a metal forming way that utilize forging press putting pressure on metal bars after heated by medium frequency furnace,then get net-shaped precision parts.Investment casting is that first melting raw material into liquid,then pour the liquid into the mould and cooling down to obtain solid metal parts.So the production processes of them are quite different.

Surface finish:According to different production processes,you will see a more smooth surface of drop forgings.There also even exist external defects of investment castings,like air vent,ect.

Low price is the biggest attractive point that American and European companies come to China to source drop forgings.Maybe you can find many drop forging manufacturers to quote for you,but it is really a big learning on how to select a Chinese drop forging supplier.A good drop forging supplier will be more professional and help you save lots of time&money.Currently,the whole trend is that many drop forging suppliers are making themselves to be more normative,so that "China made drop forgings" will be more accepted by overseas market.We,Ningbo Fly Drop Forge Co.ltd are now working hard every day to ensure all of our customers will be satisfied at our services.And almost all of them are happy to keep business relationships with us and we sometimes are even recommended by them to other companies who need drop forgings.So we sincerely feel that all endeavor is worthy.