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The development process of domestic ordinary cylindrical spring coiling machine is reviewed, and the current development status is summarized. Fully affirmed the great contribution of the spring industry equipment manufacturing enterprises in the process of promoting the industry to enter mechanization and computerization. Comparing the development of the same industry abroad, we found the shortcomings of the domestic industry. And put forward his own views on the future direction: that is, you can imitate and narrow the gap first, accumulate experience, and then innovate to catch up. The words of a family are for reference only.

1 Development process and status quo of spring coiling machine industry

Before the reform and opening up, my country's spring industry was restricted by the development of domestic manufacturing, with a small overall scale and low technical level. Except for a few military industrial enterprises that imported some foreign equipment, most of them used manual and semi-mechanized methods to process industrial springs. The automatic spring coiling machine (Z53 series) produced by Luoyang Machine Tool Plant represented the highest level of domestic spring coiling equipment at that time. The manufacturer does not yet have the ability to equip it. At that time, the wire diameter of the Z53 series spring coiling machine can cover 1~14mm, which basically meets the domestic spring production needs. Although it is only used by some powerful state-owned enterprises, it also marks that the production of my country's spring industry has changed from manual semi-mechanical production. The way entered the period of mechanized production.

After the reform and opening up, due to the rapid development of light industry, electronics and other industries, the demand for light small diameter springs has increased, and the quality requirements have been correspondingly higher. The accuracy, efficiency and wire diameter range of the Z53 series can no longer meet the market demand. In the mid-1980s, Luoyang Machine Tool Factory introduced three types of mechanical spring coiling machines of the FS series from the former West German WAFIOS Company. The wire diameter ranges from 0.1 to 3mm, and its accuracy and efficiency are much higher than the Z53 series. It is the best-selling model on the market, with a cumulative sales of nearly 1,000 units.

Later, due to the increase in motorcycle output, the demand for shock-absorbing springs and valve springs was great. Luoyang Machine Tool Plant introduced two models of the CML series from Japan’s Okuno Machinery Manufacturing Co., Ltd. in the 1990s. The diameters were 5rmi and 8mm, which fully satisfied the domestic motorcycle industry's demands for springs at that time.

These two successful introductions have shortened the gap between my country and the world's advanced level, and also represented the advanced level of domestic mechanical spring coiling machines at that time. It has basically the same period with foreign technology, and there is no generation gap.

With the rapid growth of the domestic economy, my country's manufacturing industry has also experienced rapid development. In particular, the automotive industry has continued to grow at a double-digit rate, and finally won the world's first place in 2010 with an impressive sales of 18 million [2] vehicles. Of course, on the one hand, the United States, a traditional power in the automotive industry, has not recovered from the financial crisis. On the other hand, it also shows that my country has made great progress in the field of traditional manufacturing.

The rapid development of the automobile manufacturing industry has a very obvious pulling effect on the spring industry. The domestic spring industry has entered a very rare golden development period. Spring manufacturers in several important regions in China rely on the development of the automotive industry in the wood region to expand production capacity and update equipment. Suspension springs and valve spring production equipment for the iconic products supporting the automotive industry have been in strong demand. This has also brought excellent development opportunities to domestic equipment manufacturers.

Firstly, a spring coiling machine with AC servo motor and computer numerical control was produced by the means of introduction, digestion and absorption, which was monopolized by foreign products. Afterwards, not only the wire diameter range was increased to 20mm, but also the number of computer-controlled axes was increased from 2 to 5, 6 and more. Although there is still a gap between the products of domestic manufacturers and foreign products, they can also meet the requirements of most domestic manufacturers and the price advantage is very obvious. Not only did my country's spring industry popularize computer spring coiling machines in a very short period of time, it also lowered the domestic prices of overseas products. Take the 20mm 5-axis servo computerized spring coiling machine produced in Taiwan, which has the largest sales in the domestic market, as an example. The price has dropped from the initial 2.6 million yuan/unit to the current 1.7 million yuan/unit, a drop of more than one-third. -One, but the price is still higher than domestically produced m0.

In the mid-1990s, there were only four or five computer spring coiling machines capable of producing springs with large diameters (above 16nun) in China. They were distributed in state-owned enterprises in Shanghai, Tianjin, Shandong and other places. And other foreign brands. At present, the number of such equipment owned by domestic spring manufacturers has exceeded 70 sets, and more than half of them have been produced in Britain and China. At the same time, domestically-produced equipment for commonly used models with wire diameters ranging from 3 to 8mm has occupied most of the market share, accounting for more than 85% of the market based on the number of units, and the import volume of foreign equipment is decreasing. At present, three major computer coil spring machine production bases have been formed in China in Luoyang, Zhejiang, and Guangdong. The output in other regions is relatively low.

Domestic manufacturers of spring coiling machines that rely on private enterprises for their livelihoods have made great contributions to the localization of computerized spring coiling machines. While achieving better economic and social benefits, they have also cultivated a large number of product designs and The debugging technicians lay a good foundation for the future development of this industry.

However, the core technology of the computer spring coiling machine is the operating system, and at present domestic companies do not master this part of the technology, and all manufacturers purchase from outside. Most of them use Taiwanese operating systems. Due to the need of competition, they obviously will not sell the most advanced operating system to the mainland. The operating system gap will inevitably affect the performance of the equipment, even if the hardware is exactly the same, this problem is still the bottleneck of the development of the domestic industry.

Today, with the big explosion of information technology, there have been many domestically developed practical operating systems for general equipment in the machine tool industry, helping domestic equipment to reach the stage of computerization. Only in the field of spring coiling machines, no domestic company has been involved in the system Development, I don't know if it is because of the miscommunication of information, or the cake is underestimated. We have repeatedly reported this issue to the Association through the Association, and there is still no improvement.

The operating system is controlled by others, which makes domestic products have a thousand people, few characteristics, and it is easy to enter the vicious competition of price fighting. This is very detrimental to the development of the entire industry.

2 Prospects for the future development direction

The places and countries with higher technical level of foreign spring coiling machines include Germany, Sweden, Hben, and Taiwan.

Due to the continuous integration of the latest scientific and technological achievements, the products are becoming more and more perfect, each with its own characteristics and functions.

First of all, the operating system has realized man-machine dialogue and 3D imaging. Debugging samples that are laborious, time-consuming and material-consuming is completed in the operation field 1, which not only improves efficiency, but also improves benefits. The high-performance operating system can control twelve axes. It is convenient to expand the function of the device. (Such as the change of left and right rotation, the adjustment of the pitch, and the change of the cutting method are very simple. In order to control the spatial shape of the product, "winding fingers" can be added to the equipment. High-precision and ultra-stable spring winding machines are also foreign A highlight of the spring coiling machine. Some special products with wire diameters below 0.1mm cannot be produced by domestic equipment, resulting in extremely high prices for such equipment. Equipment weighing several hundred kilograms has to be sold for millions of yuan.

When carbon emissions have become a global topic, emission reduction has also become the design concept of spring coiling machines: reduce power consumption as much as possible, and store the energy generated by the brakes such as reversing and parking of the equipment. There have been successful applications abroad.

By comparing with foreign advanced technology to find out our own shortcomings, we have a development direction. In 2011, the Council of General Components Association put forward the development idea of "professional, precise and special" in view of the market characteristics and equipment status of our country. It is to replace the universal type with special equipment to reduce costs and reduce consumption. Research and develop our own high-precision, ultra-stable products; aim at the development needs of special industries, and produce equipment that can meet market needs.

We have completed the upgrade from mechanical to computer in a very short period of time. We are also capable of catching up and closing the gap with the world's advanced level in a short time. The rapid development of my country's high-speed rail and rail transit industries, as well as the continuous emergence of new materials, new processes, and new technologies, make us face a good development opportunity. The initial imitation is also to accumulate energy for future innovation. Let us use unremitting efforts to contribute to the development and progress of this industry, and we also call on related industries to give us strong support.