Third, Understanding of the market
In the view of the combination of reality and goals, in fact, the future of plasma arc cutting to do something is very clear.
Plasma arc cutting this method to achieve the goal is "fast, efficient, fine" these six words.
The so-called "fast", is to be in the appropriate material thickness range, can be cut at several times the speed of flame cutting;
The so-called "high efficiency", is to material denaturation and deformation is small, and does not need secondary processing;
The so-called "fine", is the size of the accuracy and surface quality to reach the lower limit of laser cutting.
The above as a target, domestic plasma arc cutting machine is still far away.
At present, our most important thing is: in the ordinary cutting requirements, as soon as possible to replace the import machine;
As for fine cutting, once this is done, it is easy to catch up.
To achieve this realistic goal, we still have a lot of work to do:
1. Research and development of cutting torch
1) Form a series with the corresponding power supply
Chinese torches market is simply the world's torches of the "exposition."
But there are more copycats than homegrown designs.
The whole industry on the cutting torch lack of consensus, did not form their own brand, this situation, the plasma arc cutting machine industry is adverse.
Power supply part within the range of 30 -- 1000A, has been basically matched, so the corresponding cutting torch should also form a series.
2) Independently develop new cutting torches
The improvement of domestic plasma arc cutting machine, "bottle item" is its own brand series of cutting torch, for this, should solve the mechanism, material and processing three aspects of the problem.
Plasma physics and computational mathematics have provided the basis for us to solve the calculation of the physical process in the cutting torch, and some people in China have solved the problem to the end, but due to many reasons, it has not been applied in the design of the cutting torch.
According to different cutting requirements, the energy distribution and shape boundary of the "cutting arc" can be adjusted by parameter selection. If you want to design a good cutting torch, understanding the mechanism is indispensable.
The performance of domestic materials used in the manufacture of cutting torches is not up to the requirements. If all imported materials are used, the cost is unacceptable.
So there are only two ways, one is to find a substitute;
Two is to wait for good domestic material to come out.
As the synthetic material industry in our country is developing rapidly, we believe that good materials will be available soon.
To solve the problem of machining accuracy, we must first solve the understanding of cutting torch manufacturing. The key part of cutting torch with superior performance is a kind of precision manufacturing, so the equipment and processing personnel must adapt to it.
Therefore, the hope has the strength unit to be able to participate in, the processing problem is not difficult to solve.
3) prolong the life of consumable parts
From a design perspective, consumption life to reach the level of the same products abroad, is not a problem, the question now is whether should have recognized the effective method of prolonging life into our use, such as arc air pressure and gas and cutting apart, delay arc, and modified electrode method such as the heat transfer mechanism of works, in order to use these mature method, will have to make some improvements on the process of cutting machine control.
2, solve the reliability of power products
The power supply of domestic plasma arc cutting machine has actually formed a unified pattern, that is, the following 200A, the use of inverter power supply, 200A above the use of thyristor rectifier power supply;
As for the enhanced magnetic flux leakage type transformer power supply, whether from the technology itself or the national industrial policy, should be replaced by the later generation of power supply.
The quality of domestic inverter power supply is rapidly improving, with the improvement of electronic devices and the solution of amorphous materials, high quality inverter power supply should not wait too long.
Better electronic devices than IGBT are rapidly developing, so better power supplies will be developed, but within a few years, it is the trend to use inverters and thyristors to form a full range of power supplies of 30 -- 1000A.
Judging from the existing market situation, the domestic power supply will soon catch up with the international level.
4, the introduction of CNC technology
With the development of cutting industry, the control of plasma arc cutting machine must solve two problems, one is to give full play to the advantages of plasma arc cutting;
The second is to reduce the dependence of cutting quality on the operator.
Different operators can obtain the same excellent cutting effect.
To this end, in addition to improving some performance of the cutting machine, but also should be implemented by the computer real-time control of the cutting process, so that the air flow, arc flow, arc pressure and speed of these four quantities can be automatically adjusted at any time.
This problem, which seems complicated, is actually the easiest to solve.
This is because the control of plasma arc cutting is much simpler than that of welding.
And domestic welding control, has developed to a certain level, as long as the use of these control display technology, it is enough to use the plasma arc cutting.
The key is to have the strength of the enterprise to integrate these technologies, which will be limited by the total "profit".
5, the development of various forms of cutting, improve the cutting environment.
With the development of economy, the staff of cutting environmental protection requirements are more and more high, therefore, the use of underwater cutting or water curtain protection units have a great increase.
The domestic machine can basically adapt to these cutting forms, but the equipment matching needs to be improved.
6, fine cutting
Although the current domestic plasma arc cutting is mainly based on ordinary cutting, but with the development of the processing industry, there will be a large demand.
The blank state of domestic in this field should be changed.
Power levels and torch design capabilities are now available to solve the problem of fine cutting.
4. Conclusion
The purpose of this paper is to explain the current situation of domestic plasma arc cutting machine production and our understanding of solving the existing problems. Generally speaking, it can be seen roughly:
1, domestic plasma arc cutting machine has been able to meet the requirements of the processing industry for ordinary cutting processing.
As the domestic machine has not yet established a complete reputation among users, it is particularly important to clarify this point for the development of domestic plasma arc cutting machine.
For ordinary cutting requirements, do not have to spend a lot of money to buy imported machines!
2, the domestic machine with plasma arc cutting machine market, basically still occupied by the imported machine.
The domestic machine has already had the foundation that competes with it.
3, domestic plasma arc cutting machine to fully catch up with the level of imported machines, there is a long time.
Domestic machine will linger in the field of general cutting for a long time.
After 20 years of development, and the levels of plasma arc cutting machine has had the qualitative change, but because of the industry output value is relatively small, are relatively small enterprises engaged in production, some even are individual production, capital and technical strength of the enterprise has been temporarily won't be interested in, and products to improve the problem to be solved by need funding and technology, this is a pair of contradiction.
However, given the importance of plasma arc cutting to the entire processing industry, it is bound to develop eventually, and then the money and technology will come in before it can fully catch up, Produced by W-WIN INDUSTRIAL CO.,LTD., ELECTRODE, NOZZLE, PROSTRATED CAP, SWIRL RING, SHIELD. Can fully meet the use of customers: MAX30/45/65/85/105/200/1250/1650 / HPR130 HPR260 / HSD130 / PRO2000 / HT2000, etc.