bookbashuk Chapter 240: CNC Machine Tools
Chapter 240: CNC Machine Tools
Especially complex and precise parts cannot be separated from the help of CNC systems.
In addition to lathes, milling machines must also be developed.
It is mainly used for processing planes and grooves and is another major contributor in the machine tool family.
Li Yang plans to install a gantry milling machine, machining center and other high-end equipment to further enhance the milling capabilities.
The grinding machine cannot be left behind. It is crucial in the last step of machining.
Li Yang will focus on the development of CNC grinding machines to ensure that the surface roughness of the workpiece reaches below Ra0.4.
In addition, special equipment such as boring machines, planers, drilling machines, gear processing machines, etc. are also included in Li Yang's plan.
He even wanted to develop cutting-edge equipment such as heat treatment furnaces.
Li Yang knows very well that only when these "mothers of industry" come together and form a system can they support the backbone of a country's heavy equipment, produce sophisticated machine tools and equipment, and ultimately benefit hundreds of industries.
Machine tools are the cornerstone of a country's industry. With them, all industries, including aerospace, high-speed rail, automobiles, and electronics, will be more powerful and take off on a higher platform.
"To build an independent and complete industrial system, we cannot do without the 'mother of industry'. We must master the core technology and seize the initiative of development!"
Li Yang swore secretly in his heart, his eyes as firm as torches.
He wants to achieve the great goal of localizing machine tools at the fastest speed!
……
In today's world of rapid technological advancement, CNC machine tools have long become the darlings of the industrial field. Their precise and efficient processing capabilities have enabled countless products to be perfectly presented.
As a time traveler, Li Yang has unique advantages. He is familiar with the development trajectory of future technology and has extraordinary talents granted by the golden finger.
At this moment, in the grand blueprint of building a first-class machine tool manufacturing system, the research and development of CNC systems has become Li Yang's top priority.
He knows very well that only by mastering this core technology can he gain an invincible position in the field of mechanical processing.
So, Li Yang started a new round of study and research.
In his mind, the development process of CNC technology gradually unfolds:
[Ding, the host has triggered a learning task! Retrieving relevant information on the history of the development of numerical control systems. Learning progress: 3%...]
The system prompt sounded,
Then, a large amount of information came flooding in.
The first CNC system was born in America after World War II.
In 1947, John Parsons, an engineer at Parsons Corporation, designed the world's first CNC milling machine in order to improve the processing accuracy of helicopter blades.
This machine tool uses punched cards to input data and servo motors to control the movement of the worktable, thereby achieving automatic processing.
Although it is still very primitive and the processing efficiency is not high, there is no doubt that the curtain of the CNC era has been opened!
In the 1950s, researchers at MIT developed an improved version of the CNC milling machine, using magnetic tape instead of punched cards, greatly increasing the speed of program input.
At the same time, they also invented the G code, making programming more intuitive and simple, which marked the beginning of the practical application of CNC technology.
In the 1960s, the emergence of integrated circuits completely changed the face of CNC systems.
People began to use transistors instead of vacuum tubes and microcomputers instead of magnetic tapes, which greatly reduced the size of numerical control devices while making them more powerful.
Straight lines, arcs, spirals, and various complex curved surfaces can all be easily processed, which amazes the machinery manufacturing industry!
……
As the progress bar of the system continued to advance, Li Yang's mind clearly displayed the evolution process of CNC technology from simple to complex, from rough to sophisticated.
He has a more comprehensive and profound understanding of this great invention that will completely change the manufacturing industry.
[The CNC system learning is complete! The host has mastered the relevant theoretical knowledge, and the current skill level is: CNC expert! Congratulations, you have surpassed 99% of practitioners in this era!]
As the last file flashed, the system prompt sounded again
"As expected of you!"
Li Yang looked at the evaluation in the system and a confident smile appeared on his lips.
With this knowledge, is he still afraid of not being able to operate a CNC milling machine?
Suddenly, he remembered something. His brows gradually furrowed:
As early as the late 1950s, Chinese researchers began independent research and development of CNC machine tools.
A large number of elites worked day and night and finally produced the first domestically produced CNC milling machine in 1959.
Its main features are that it uses relays and contactors to achieve control, uses punched paper tape to input programs, has three-axis linkage, and can process complex parts.
This achievement marks a key step forward in the field of numerical control in my country!
Unfortunately, due to various influences, coupled with the weak industrial foundation and insufficient supporting facilities at the time, this milling machine was not put into mass production.
It eventually became a prototype, shelved and left gathering dust for many years...
After reading this, Li Yang couldn't help but feel a sigh in his heart.
He thought of those researchers, who must have devoted their efforts to building this CNC milling machine with a heart full of patriotism, right?
Unfortunately, they were out of luck and their hard work went to waste.
"Alas, everyone is romantic, but it's just that luck is bad." Li Yang sighed, but soon, he rekindled his fighting spirit.
He secretly vowed in his heart: to take over the baton from his predecessors and create a new generation of CNC milling machines!
We must not only master the core technology, but also put it into mass production, spread across major workshops, and benefit more workers!
Thinking of this, Li Yang could no longer suppress his excitement and immediately started to formulate a design plan.
Compared with the domestic CNC milling machines of that year, the one he was going to develop was undoubtedly much more advanced.
"First, the control system. Since there were no microcomputers at that time, I used transistors to build an IC integrated controller.
This will not only greatly reduce the size, but also improve reliability, so why not do it?"
Li Yang was sketching on the drawing and thinking about it.
He plans to use discrete components and build his own IC chip. Although the cost is higher, it is more flexible, controllable and has high technical content.
"Now that we have the controller, the next thing is the input device. Although punched paper tape is the mainstream, it is too inefficient. We need to replace it with something more advanced, such as magnetic tape! Yes, let's use cassettes! The capacity of a cassette is much larger than that of a paper tape!"
Li Yang's eyes lit up and he added a sketch of a tape recorder in the corner of the drawing.
The principle of cassette recording is actually very similar to the input of a CNC system. Both convert continuous analog quantities into discrete digital signals.
Li Yang plans to make a magnetic head first, use electromagnetic induction to transcribe the G code onto the cassette, and then transmit the signal to the controller through the amplification circuit to drive the machine tool to move.
"In this way, the input efficiency and reliability of the program are greatly improved!"
Next, is the mechanical structure.
……
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