my scientific age

Chapter 232 Processing deep hole gun drills!

In the machinery manufacturing laboratory, the sound of metal-to-metal friction cutting did not appear. As an experienced top mechanical expert, Zhuang Qianding did not rush to carry out actual manufacturing, but gave priority to designing processing plans and deep hole drills.

In the past, Zhuang Qianding was mainly limited by thinking, and there were certain limitations in concepts. Now, with the emergence of Yu Hua, a novel processing method, Zhuang Qianding immediately came up with a series of inspirations.

"Yusheng, you are good at math, calculate the shape parameters of the drill bit."

"Okay, I will build a mathematical model, and the design parameters of the drill bit are..."

"No wonder Luo Geng and Wuzhi like you so much. I'm starting to like you too. Let me calculate the data here. This is the drilling efficiency, so I can compare it."

"it is good."

"Calculate here again. Since the hardness of the drill is the same as the hardness of the workpiece, how much feed rate do I need to prevent the tool from breaking, and then add the coolant flow as a variable factor."

"immediately."

In the past, Zhuang Qianding used to take more than ten minutes to calculate a piece of data. Now, Yu Hua, who has a very high academic level, and a terrifying computer like a humanoid computer, can be described as even more powerful.

Only the corresponding parameters are given, and the corresponding calculation data can be given in less than ten seconds, and the data can be stored for a long time to improve the drawing efficiency.

This feeling made Zhuang Qianding feel more comfortable than ever.

Half an hour later, the highly efficient deep-hole drill design scheme with rigorous mathematical verification appeared, with a diameter of 7.92 mm, and three views and processing drawings were drawn according to the latest Chinese drafting standards.

Without any hesitation, the entire work enters the most important link, manufacturing.

Zhuang Qianding is mainly responsible for the manufacturing process. Yu Hua, who has never been in contact with machine tool processing, did not choose to get started. This is not his strength. In addition, his energy is exhausted, and the thinking similar to the physical system cannot carry out simulation training of machine tool processing.

However, only Zhuang Qianding is enough.

"Buzz!"

The [-]-centimeter-long barrel blank is placed in the three-jaw chuck and firmly fixed. The American-made ordinary car in the center of the laboratory is energized and activated, and the motor in the spindle box runs at high speed, driving the entire blank to move clockwise. High-speed circular motion, Zhuang Qianding stared at the worktable with his eyes, moved the tool holder with his right hand, and controlled the turning tool to contact the barrel blank.

The control of the machine tool must be careful and subtle, and must not be careless, or the car will be damaged by hitting the knife, or there will be danger to life.

The kinetic energy of the high-speed moving tool is no worse than that of bullets of the same volume, and the killing effect is even stronger, because the surface of the tool fragments is irregular.

"呲!" A slightly sharp friction sound came out, circles of filamentous metal appeared, and the cooling oil flowed out continuously to prevent the contact surface between the tool and the workpiece from becoming too hot.

Delicate and gentle.

This is Zhuang Qianding's car control style.

Accuracy is the most basic requirement of a lathe.

Time passed by minute by minute, and after about an hour, with the power off of the spindle box, the whole turning process ended. is waste.

"The plus and minus tolerances are seven wires, which meet the standard. Fortunately, the craftsmanship I learned in the United States has not fallen behind."

Zhuang Qianding took off the deep hole gun drill workpiece and measured the diameter tolerance with a micrometer. After getting the parameters, he breathed a sigh of relief and smiled to Yu Hua: "I mainly studied mechanical design and theoretical knowledge in the United States, and I didn't pay much attention to machining. After learning a rough guide, when I was young, I was able to control the tolerance between three wires to five wires, but now I can't."

"Amazing." Yu Hua heard the geometric tolerance parameters, and immediately felt admiration in his heart. He gave a thumbs up with his right hand and praised him.

The machining error of ordinary lathes is kept at seven wires. Yu Hua does not know what the machining accuracy of fitters and lathes is in this era, but he knows that Professor Zhuang himself is very good.

What is the concept of seven threads?
About 0.07 hairs thick, the size tolerance is [-] mm.

Don't look at the numbers, it seems to be very large, far less than the various micron-level high-precision machining centers in the news of later generations, but don't forget, this is China in [-], and it is impossible to independently produce high-precision ball screws And high precision servo motor of China.

The precision of the parts processed by Professor Zhuang with this American lathe fully reaches the level of the German lathe, and the processing precision is extremely high.

Importantly, their main focus is not mechanical processing, but mechanical design and theory, including chemical engineering, electrical engineering and metallurgy.

"Let's continue, and strive to process the first gun barrel as soon as possible." Zhuang Qianding heard Yu Hua's praise, and his real age was only 35 years old. With a smug smile on his face, he went straight to the The Longmen Mill next to it.

A workpiece with a standard deep hole gun drill with geometrical tolerances is then milled to produce the drill bit shape and 120-degree V-angle on the workpiece.

After fixing the workpiece and making preparations for processing, Professor Zhuang carefully looked at the processing drawings, confirmed that it was correct, and then started the big guy.

The whole gantry milling machine enters the working state, the chuck feeds down, and the milling cutter rotates at a high speed.

The main feature of the lathe is that the spindle is fixed and the workpiece rotates for the main motion, and the tool is the feed motion. The main feature of the milling machine is that the rotary motion of the milling cutter is the main motion, and the movement of the workpiece and the milling cutter is the feed motion.

Lathes are mainly aimed at workpieces with various rotating surfaces and helical surfaces, but cannot process planes and grooves, while milling machines can process planes, grooves, gears, and various curved surfaces, as well as workpieces with more complex shapes.

The combination of the two can solve the processing problem of deep hole gun drilling.

"Om!" The spindle rotates continuously, and the high-speed rotating milling cutter is under the control of Zhuang Qianding to precisely mill the surface of the workpiece. In just a few minutes, the geometry of the deep hole drill has been presented.

Slotting, machining V-shaped corners.

The V-shaped angle is the most common and practical design for deep hole gun drills. From the drill bit to the drill body, the coolant and metal chips during drilling can come out through the space reserved by the V-shaped angle during the movement.

The deep hole gun drill designed by Zhuang Qianding only improves the shape of the drill bit, but does not change the V-shaped angle design of the drill body. The drill shape is calculated by Yu Hua, and the drilling efficiency is about 5% higher than that of the conventional deep hole gun drill design.

Not much, but an improvement.

After half an hour.

The gantry milling machine was powered off, and on the workbench lay a deep-hole gun drill with a silvery-white metallic luster.

"The accuracy meets the tolerance standard." Zhuang Qianding took off the brand-new deep hole gun drill and measured the machining accuracy and plane accuracy with a micrometer and a feeler gauge respectively. After obtaining the parameters, he breathed a sigh of relief.

"One success, Professor Zhuang, we are only one step away from success." Yu Hua realized that he is now a salty fish who can only shout 666, smiled, and hurriedly sent his congratulations.

The successful one-time processing of the deep hole gun drill is all thanks to Zhuang Qianding, and has nothing to do with Yu Hua.

However, this in no way prevents Yu Hua from sending congratulations and praises to show his sense of existence.

(End of this chapter)