China's manufacturing industry is changing from quantity expansion to quality improvement. The process of changing from a "big manufacturing country" to a "strong manufacturing country" requires many supporting infrastructures to be innovated together. In the process of this reform, buying a good machine tool has become a new demand in the current market. What kind of machine tools do users have? How do we define this? As we all know, China's machine tool manufacturing capacity is relatively weak, which is an indisputable fact? Many machine tool accessories rely on international imports. According to authoritative data analysis, the localization rate of small and medium-sized machine tool manufacturers in China is less than 20%, and the remaining 80%, such as machine tool guides, lead screws, systems, accessories, are basically imported. What is the 20% localization rate that we can control?

The answer is machine tool body casting. At present, we can control the frame design, casting, tempering, scraping and assembly of machine tools. Since the reform and opening up, China has made many countries' OEM factories. Due to the accumulation and innovation in the first 40 years, great progress has been made in the casting field. The production process and production equipment in the casting field have developed into a very mature industrial system. I believe that many domestic foundries have worked for machine tool body castings of foreign machine tool brands. However, they did not have the conditions and strength to focus on the layout of machine tool manufacturing in the golden decade of machine tool development. Speaking of this, some people would say that what difference can all castings make? It mainly depends on the role of the precision accessories on the machine tool. If you think so, it's a big mistake!

A good machine tool can not be separated from high-quality machine tool bed castings. There is no cheap and high-quality castings in the market, and the raw materials are expensive. The bed is equivalent to a human skeleton. Even if our internal parts are good enough, we cannot play our own performance without a strong and powerful body support; Now there are some manufacturers with low price and high volume in China who sacrifice the materials of the bed castings and reduce the tempering times to reduce the cost under the condition that the accessories are the same. You can see that the machine tools with the same price have the same parameters and accessories brands, but they are cheap. You think it is a high cost performance ratio. But I don't know that problems will occur in the actual use process after you buy them. The positioning accuracy is very good at the beginning, After a few days of work, I found that there were several threads changed. I wondered if my processing technology was arranged at the wrong time, but I didn't know that the bed was not awesome because we didn't know the importance of the bed. In order to ensure the accuracy, customers always asked the manufacturer to adjust it, dismantle it, install it, and start again every week; One to two years later, the accuracy can no longer be guaranteed by reinstallation and adjustment, and it has become a machine tool with high configuration and low productivity. The reason why the accuracy cannot be maintained is that the quality of machine tool castings is too poor.

In addition to the lead screw, servo motor and system, the quality of castings cannot be ignored to ensure the accuracy of a good machine tool. Only by ensuring high strength, high rigidity and high stability can the accuracy be guaranteed in the actual machining center! Without strong support from the bed, no matter how good the configuration is!

The lathe body casting is not only a delicate adjustment of materials, but also a great deal of attention on tempering. It is the key to ensure that the lathe can withstand cutting torque and disperse shock power. Now some of the products launched by the lathe casting manufacturers to save costs are mostly semi-finished products that have not been fully tempered. In short, I also tempered, but once again, or when the surface treatment is good, it stops, The internal stress and incomplete stress have not been effectively eliminated before they are delivered to the customer. The real tempering needs to be analyzed and studied according to the size and material mechanics of the casting, and the correct tempering aging treatment can be done to meet the mechanical property requirements of the material. However, this process is very energy consuming. Large tempering kilns are electric tigers, and small enterprises can't afford to temper them, let alone let them temper twice. Why do Japanese and German machine tools still have good accuracy after ten years of use? Among them, the contribution of castings is great, and these units are very careful to purchase castings. Many of the casting purchasers are people in the casting industry or have received profound education in casting. Therefore, in terms of quality control and performance requirements, they are naturally a lot less than the so-called price performance ratio pursued by the domestic market, but they won at the starting line at the beginning!

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In a word, if you want to have a high-precision machine tool, you must have good castings, which is the basis of everything. Even with the best spindle, lead screw, guide rail, and assembly, you cannot guarantee that two years later you will become a waste machine with no precision or even a second-hand machine tool manufacturer. Again, the purchase of machine tools must depend on the comprehensive strength of the manufacturer, not just on paper parameters. Cheap goods are not good, and good goods are not cheap, which is very important in the machine tool industry! In the future, the development of China's manufacturing industry will not only depend on the manufacturing capacity of machine tools, but also on the degree of localization rate. We hope that domestic manufacturers and users can deeply understand this, and jointly create a good brand of domestic machine tools. Serving customers is the long-term development plan!