What is the upgrade of intelligent machine tools compared with CNC machine tools?

2021-08-19 06:43:16

Machine tool is the "industrial machine" of manufacturing industry, and its intelligence has an important impact on the implementation of intelligent manufacturing. Improving the intelligent level of machine tools is not only the urgent demand for transformation and upgrading faced by the machine tool industry, but also the key and foundation to build a manufacturing power. On the basis of traditional NC machine tools, intelligent machine tools are very different in hardware, software, interaction mode, control instructions, knowledge acquisition and so on.

CNC machine tool is the abbreviation of digital control machine tool. It is an automatic machine tool equipped with program control system. The control system can logically process the program with control code or other symbolic instructions, decode it, express it with coded numbers, and input it to the NC device through the information carrier. After calculation and processing, the numerical control device sends various control signals to control the action of the machine tool, and automatically processes the parts according to the shape and size required by the drawing. A numerical control system is added between people and manual machine tools, and people's physical labor is completed by the numerical control system.

Intelligent machine tool is a machine tool based on the new generation of information technology and the deep integration of the new generation of artificial intelligence technology and advanced manufacturing technology. It uses independent perception and connection to obtain information related to machine tool, processing, working condition and environment, generates knowledge through independent learning and modeling, and can apply these knowledge for independent optimization and decision-making to complete independent control and execution, Realize the multi-objective optimal operation of high quality, high efficiency, safety, reliability and low consumption in the processing and manufacturing process. Using the new generation of artificial intelligence technology to endow machine tools with the ability to learn, accumulate and apply knowledge, the relationship between people and machine tools has changed fundamentally, and the fundamental transformation from "giving them fish" to "giving them fishing" has been realized. The main characteristics of intelligent machine tools are: the new generation of artificial intelligence technology is integrated into CNC machine tools, which gives machine tools the ability to learn and generate and accumulate knowledge.

Different intelligent machine tools have different functions, but their goals are the same: high precision, high efficiency, safety and reliability, low consumption. After understanding the basic meaning of CNC machine tools and intelligent machine tools, let's explain the specific differences / upgrades between them:

1.Quality improvement: improve machining accuracy and surface quality

Improving machining accuracy is the primary driving force for the development of machine tools. Therefore, compared with CNC machine tools, intelligent machine tools have the functions of processing quality assurance and improvement, which can include: machine tool spatial geometric error compensation, thermal error compensation, motion trajectory dynamic error prediction and compensation, double code joint control surface high-precision machining, precision / surface smoothness priority CNC system parameter optimization and so on.

2. Process optimization: improve processing efficiency

Process optimization is mainly to adaptively adjust the machining parameters (such as feed rate optimization, spindle speed optimization, etc.) according to the physical properties and cutting dynamic characteristics of the machine tool, so as to achieve specific purposes, such as quality priority, efficiency priority and machine tool protection. Its specific functions can include: self-learning / self-growth machining process database, process system response modeling, intelligent process response prediction, machining process parameter evaluation and Optimization Based on cutting load, automatic detection and adaptive control of machining vibration, etc.

3. Health guarantee: ensure the integrity and safety of equipment

Machine tool health assurance mainly solves the problems of machine tool life prediction and health management, in order to realize the efficient and reliable operation of machine tools. Compared with NC machine tools, intelligent machine tools have overall and component level health status indication of machine tools, as well as health guarantee function development toolbox. Its specific functions can include: intelligent maintenance of spindle / feed shaft, machine tool health status detection and predictive maintenance, statistical evaluation and prediction of machine tool reliability, maintenance knowledge sharing and self-learning, etc.

4. Production management: improve management and operation efficiency

The intelligent function of production management mainly realizes the optimization of machine tool processing process and the low consumption (time and resources) of the whole manufacturing process. Compared with the traditional NC machine tools, the intelligent functions of production management of intelligent machine tools are mainly divided into machine tool status monitoring, intelligent production management and machine tool control. Its specific functions can include: intelligent judgment of machining status (tool breaking and chip winding), intelligent detection of tool wear / damage, intelligent management of tool life, intelligent management of tool / fixture and workpiece ID and status, low-carbon intelligent control of auxiliary devices, etc.

As the setter and promoter of industry standards, Zhejiang Aobo will always stand in the front of the industry. This is a free vertical spindle compound machine tool independently developed by Aobo for the processing of disc parts such as water pump, motor, valve, automobile and motorcycle parts. It can intelligently and unmanned process more than 90% of disc parts in the manufacturing industry. The machine tool configuration includes material conveying system, loading and unloading system, visual detection and positioning system and composite processing area, which can realize automatic loading and unloading, turning, boring, milling Drilling, tapping, reaming and other complex processes are processed at one time.

The machine tool takes materials from the chain plate conveying system to the robot / truss manipulator, visually guided and positioned, and then to the material buffer area. After the processing area is completed, the spindle is refuelled and reciprocating uninterrupted processing is carried out; The loading and unloading system works synchronously with the processing area to reduce the processing waiting time and realize intelligent integration more reasonably and humanized; The whole process of automatic processing, reduce manual errors, improve production efficiency, reduce production costs, and finally realize intelligent unmanned production.