It has been observed from around the world that there has been a rapid development in China''s manufacturing industry in recent years.  This means that there exists a potential great market for the CNC bending machine tool industry. In this background, low manufacturing costs in China has been acknowledged as a factor from the labor productivity point of view.  Statistics show that there is a 3 to 5 times gap between China and Germany or the United States or Japan or other developed countries.  With such a large market, low labor productivity, coupled with manufacturing technology that continues to progress and develop, CNC bending machine tool industry has both an opportunity and a challenge not only for growth but also for improved quality and even more when there is great demand in the market for CNC bending machine mold. From a user industry perspective, there are seven CNC bending machine tooling industry that are most significantly in demand.

One of these is in the power generation equipment manufacturing. There is a high and urgent demand to supply global sources due to the continuous increase in oil prices, so it is evident that the demand for power generation equipment has also been increasing.  In the power equipment manufacturing, CNC bending tooling machine spent very substantial part of the cost.

CNC bending machine tooling mold manufacturing has the largest share of one of the industries. In the mold manufacturing process, moldings such as hot mold, cold mold and molds in almost all sectors need to use CNC bending tooling machine. In addition, automotive, high-speed trains, general machinery manufacturing and the wood processing industries which has gradually expanded in recent years have become one of CNC bending tooling machine industry’s main users.

Aerospace industry is the most traditional and the most important CNC bending tooling machine applications. In the industry, CNC bending machines are generally used for cutting mold pieces for the aircraft structure. These structures are usually larger pieces in the past and a uses a lot of aluminum alloy. With the use of titanium and other composite materials which expanded the fields of application in the aerospace industry, the CNC bending tooling machine  requirements have been increasing.

As one of the state aid industry, the Government in recent years has invested heavily in the aerospace industry for the development of large aircraft. And in all aspects of development, we extracted an analysis of the CNC bending machine to mold-related aspects that focused on the use of different materials on structural parts.

From the latest Boeing 787 fuselage, it can be seen in the past that a large number of direct overwrite method using aluminum alloy has been gradually abandoned and replaced by the direct laying and winding of composite materials.  In additiona, compared to the past, the amount of titanium currently used is also increasing  These new methods can significantly reduce aircraft weight, save fuel and energy, which is especially very important for large aircrafts.

Titanium is recognized as a difficult material to process. The rolling and winding of composite materials appear to need much processing capacity, but the quality of the processing requirements are growing.  And this is not a small challenge for the CNC bending machine tool industry. In addition to the difficulty in processing  the airframe and aircraft engine, the motor generally also use difficult to machine materials with complex shapes requiring notch drilling.  These high requirements in processing and other processes leaves CNC bending as the practical choice of moldcutting machine. In addition, to meet the high quality requirements of the pieces of aircraft structure, the CNC mold cutting machines in general are equipped to cut out more than 90% of the rough material with high volume and extremely high processing efficiency requirements. 

( 2 )The trend in the development of machining work technology.

The development of the CNC bending tooling machine started from the late nineteenth to the mid-twentieth century. It was first developed in Germany in 1927 using high-speed steel as primary mold material in the CNC bending machine. To extend to other applications, CNC bending machine used carbide die materials in the twentieth century particularly in the 50s when Sweden and the United States were to synthesize diamond which were then used in this period in CNC bending machine for cutting super-hard material into the mold.  In 1970s, people synthesized various poly crystalline diamonds (PCD) to resolve the high cost of using large quantities of rare natural diamonds which are expensive.  With the resolution of the high expense problem, it started the extension of the applications of the diamond CNC bending tooling machine to the aviation, aerospace, automotive, electronics, stone and other fields of applications.

CNC bending machine’s choice of materials in die cutting has been the basis of success. Compared with the carbide, with the use of PCDs, the CNC bending tooling machine can reach speeds of up to 4000m/min while the  carbide can only reach ? of this speed. From the life point of view, the PCD type CNC bending tooling machine’s life is generally increased by 20 times. And with the use of PCD, the surface quality of machined looks 30% to 40% better compared to using carbide.  In addition, C/BN (Carbon Boron Nitride), a hard material used in mold coatings to promote cutting also  contributed to the development of technological progress of CNC Bending tooling machine and CNC bending machines.

For 100 years, the rise in speed of CNC bending machine die cutting, which brought increased changes in processing efficiency, also brought about further expansion of the scope of the process.  The development with the largest significance is high speed machining (high speed cutting, referred to as HSC) development.

A high-speed cutting system involves many aspects. Only from the process point of view, the traditional cutting of a workpiece to be machined (eg, mold), need to go through rough annealing - roughing - finishing - ready to quench-EDM - EDM process - particularly the finishing - artificial polishing procedures. The high-speed quenching process requires only rough - rough - semi-finishing - finishing and super finishing and other sectors, reducing the traditional steps by three steps and reducing processing time by 30% ~ 50%.   In the processing of small parts, this advantage is particularly evident.  Even worse, some companies in the past who makes the complex die, basically need 3-4 months to be abl;e to deliver. After the development of high-speed machining, only half a month is needed to complete and deliver.

A high-speed machining systems, CNC bending machine from the mold and the technology of two parts. And CNC bending tooling machine factors related to CNC bending machine mold material selection, CNC bending tooling machine  system composition, CNC bending machine required for processing the edge of the shape of mold. The technology is closely related with CAD / CAM system selection, CNC bending tooling machine path planning, cutting parameter setting and the cooling and lubrication link.

Since the popularity of the high-speed cutting, from 1950 to 2000, which is half a century, the processing efficiency is improved by 4 to 5 times. Of course, there is need to mention that high-speed cutting process object is generally defined by its "high speed" in range.

The total manufacturing cost of CNC bending machine dies is not great. We manufacture for the automotive industry as an example of analysis: the total investment cost of machine tools and other equipment are 35% accounts for energy consumption of equipment, work accounts for 7%, business and normal operating costs accounts for 27%, cooling and lubrication costs accounts for 17%, 9% for direct labor, and 4% for CNC bending machine mold. Similarly, the cost for machining aluminum parts in mass production are, 16% for cooling and lubricating, 4% for CNC bending machine mold and 80% for other processing costs.  As you can see, CNC bending tooling machine cost is only  a small part of the whole total cost but it can not be ignored that it costs 4% CNC bending machine mold but may affect 10% to 15% of the overall processing efficiency.

For the CNC bending machine ,there are three important factors: cost, lifetime and efficiency.  It has been experimented that the cost decrease of 30% to the CNC bending tooling machine and the total cost will decrease by 1%.  If we can increase 50% of CNC bending machining lifetime, the total cost will decrease by 1%.  However, the machining is increasing, it can increase 50% of the CNC bending machining efficien\cy then the overall cost will decrease more than 15%.

Of course, improving the overall productivity of the machine, not only through high-speed cutting and machining the workpiece to reduce the time needed and greatly reduce the processing overhead time (including the machine to adjust the program to run checks, air travel, air from the brake operation, the workpiece material up and down and fixture, tool change time, etc.), standby time and downtime, because in many varieties of small batch production, the effective cutting machine tools  is normally only 25% to 35% of their total working hours can be seen.  Except outside the high-speed cutting, one of the important issues facing the manufacturing industry is how to achieve more effective processing.

At present, green processing technology has become the world''s hot spots, this green, includes an economic and efficient Huan Bao.  Kan from the environmental point of view, on the one hand is the high-speed and efficient processing of energy consumption of the Jiang Di Dai Lai, on the other hand, the liquid coolant and lubricant choice is critical. As noted above, the cost of cooling liquid proportion in the overall cost is high, reaching about 16%.  Lubricating and cooling effects and the overall processing efficiency is also very relevant, especially for hard to machine materials, such as alloy, cutting to a certain extent, the need for proper cooling.  With the development of high-speed cutting, cooling liquid pouring, the CNC bending tooling machine often have thermal cracking, resulting in reduced die life.  This would require improvements in the CNC bending machine.

In short, processing technology, high precision, high efficiency, low cost, environmental protection, and predictability of outcome, will be a clear trend. This predictability is the results of the processing to be predictable, controllable rather than random. This requires the operator of the processing technologies to have a deeper understanding.

( 3 ) Discuss the modern manufacturing methods

What is modern manufacturing? First modern hardware, including advanced machine tools, CNC machining systems, advanced CNC bending tooling machine used; the software, first cooling and lubrication technology and improved conditions, and second, cutting parameters optimization (ie optimization of process technology). China''s aerospace industry invested in buying a large number of advanced international equipment, but still did not achieve good and efficient discovery process. After repeated experiments it was found out that the software needs to make improvements. Visible modern manufacturing not only need to invest in a lot of advanced equipment but also investment on more advanced technology to be better armed in terms of knowledge.

Adjustment of cutting parameters, there are different practices in different companies, and as a matter of opinion these things are not repeated here. From CNC bending machine mold itself, the most important is to improve the CNC bending tooling machine life. As stated above, CNC bending tool machine  service life and cooling lubrication conditions and methods are closely related to high-speed cutting while promoting a green cooling / lubrication.  Here is a new technology on the cooling and lubrication. If the nitrogen with cold oil mist lubrication (10 ° C or less), can increase the CNC bending machine tool life 10 times.  At the same time, can improve processing efficiency, reduce pollution and improve surface finish quality.  This is especially suitable for difficult to machine materials such as titanium processing. Deviation arising from processing, directly affect the quality of the workpiece machining and can lead to other process deviations factors, such as stress distribution within the workpiece, the workpiece and clamp installation, structural complexity of the workpiece, CNC bending machine mold deformation, machine tool accuracy, stiffness and thermal properties, workpiece deformation, thermal deformation and so on.