Chapter 46 (1/2)
Xu Zhenming nodded. Naturally, he was very clear about the processing difficulty of high-precision screw rods, not to mention the screw rods processed with this special glass, so he said: ”yes, level 4 screw rods are 25 energy coins a ton! As for other levels of precision screw rods, how does Wang always price?”
”Mr. Xu! The price of the secondary precision screw rod is 10 energy coins and the price of the tertiary screw rod is 100 energy coins. I don't know what Mr. Xu thinks?” Wang Bin asked.
”OK! Just do what President Wang says!” Xu Zhenming said.
Xu Zhenming doesn't care too much about the price of secondary and tertiary screw rods. After all, as high-end products, tertiary and secondary screw rods are destined to use not too many. Even for the secondary and tertiary screw rods he needs, the monthly consumption is only 100 at most.
”Mr. Wang! First give me two tons of four-level screw rods. At the same time, give me a thousand for three-level screw rods and a hundred for two-level screw rods.” Xu Zhenming said.
Although there are not many secondary and tertiary screw rods ordered, these quantities are enough for Xu Zhenming's factory to use for about a year. After all, Xu Zhenming's factory has just entered the machine tool production industry, and the annual output is not very much.
”I don't know, Mr. Xu, do you need other products besides screw rods, such as machine bed, machine spindle, machine bearing, etc. made of our glass? If necessary, I can also try to use our special glass to make these parts.” Wang Bin thought about it and asked Xu Zhenming.
At the same time, these machine tool parts mentioned by Wang Bin are very important parts for machine tools and are not easy to manufacture. Let's talk about the machine tool bed that seems to be the easiest to manufacture.
Generally speaking, machine tool beds in various countries, including Wang Bin's world and Xu Zhenming's world, are basically made of gray iron.
After all, the machine bed seems to be cast by gray iron, but in fact, there are many requirements for the machine bed.
The first is the requirements for wear resistance and shock absorption. Because graphite in cast iron is conducive to lubrication and oil storage, it has good wear resistance. Similarly, due to the existence of graphite, the shock absorption of gray cast iron is better than that of steel.
Secondly, according to the requirements of process performance, gray cast iron has high carbon content and close to eutectic composition, so it has low melting point, good fluidity and small shrinkage. Therefore, it is suitable for casting complex structure or thin-walled castings. In addition, because graphite is easy to form chips during cutting, the machinability of gray cast iron is better than that of steel.
Secondly, hardness and tensile strength requirements.
However, these are the requirements of ordinary machine tools, but those high-precision machine tools are different. Generally speaking, the requirements for stress of high-precision machine tools are very strict, because stress has a great impact on the accuracy of machine tools.
Therefore, in general, high-precision machine tools will not use casting bed, but will adopt a more secure method, that is, to use other materials to replace casting bed, such as granite bed.