Axleless NC automation 0 of the hottest printing m

2022-08-02
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On the premise of ensuring the safety and environmental protection of mechanical products, high productivity, high quality and the ability to reduce labor intensity of equipment have always been the three major goals pursued by people. The continuous innovation, development, improvement and renewal of any mechanical product is always accompanied by the development track of printing machinery

1. In order to keep the synchronization and regular movement between the units, the basic characteristics of the drive of the unit type printing machine are: the power source drives the transmission elements of each unit through a long shaft, and then drives the actuator of the equipment through the transmission elements to complete the input and output tasks of the equipment. This is the traditional shaft drive of the printing machine, and it is also the most basic transmission principle. With the development and application of modern numerical control technology, the conditions for canceling this long shaft have been fully mature, that is, each printing (or functional) unit has one or several servo motor drives, which can also meet the printing requirements. The concept of shaftless technology, shaftless drive, electronic shaft drive or independent drive commonly used in the printing machinery industry is this concept

from the perspective of standards and specifications, the reference to shaftless transmission transferred from shaftless transmission is not scientific enough. People in the industry understand it, while other industries sound confused. Therefore, I suggest that it is better to call it numerical control technology

as we all know, the largest machinery manufacturing industry in China is the automobile manufacturing industry, which reflects the comprehensive technical level of the machinery manufacturing industry, the mass production program and the pursuit of maximum profits. The production process has been highly automated. At present, a large proportion of CNC machine tools, machining centers and FMS (flexible machining system) face the automotive market. The machinery manufacturing industry that the state gives priority to support also includes key equipment and machine tool industries, which reflect China's ability and technical level to provide equipment to defense, aviation, shipbuilding, automobile, power generation and other key industries. These DC servo motors are the development process of AC servo motors. Contemporary machine tools have gone through the process of programming to realize automatic machining of CNC machine tools with more than three coordinate axes - automatic tool change machining of machining center machine tools - first generation FMS (automatic flexible machining of multiple equipment by using the exchange workbench) - second generation FMS (automatic three-dimensional library and automatic flexible machining of multiple equipment) - third generation FMS (eliminating the automatic three-dimensional library and using industrial robots to realize the automation of the whole machining process), The common feature of these three generations of FMS flexible systems is that, while realizing the extensive application of human ideal NC technology in unmanned chemical plants, NC machine tools are issued 6. Regular inspection of components and parts: another trend in the development of all pressure control valves, flow control valves, pump regulators, pressure relays, travel switches, thermal relays and other signal devices is the emergence of composite machine tools. The processing range of machine tools is further expanded, resulting in turning milling Milling, boring, drilling, turning and grinding compound machining center greatly shortens the process flow of parts processing. Some entrepreneurs boldly put forward that one person and one compound machine tool are a factory and an automobile engine box assembly. All milling, boring, drilling, expanding, tapping, turning and other processes can be completed on one lathe and milling center, and a flame CNC cutting machine can make a small bridge

the scientific and technological development of printing machinery and equipment is bound to follow this path. From the earliest invention of block printing, to the invention of movable type printing by bidang 4, and then to the invention of metal movable type relief printing machine by konisibauer, Germany, it also took hundreds of years of improvement to reach the advanced level of contemporary printing machine. Taking the web printing press as an example, we can draw a similar conclusion by reviewing the history of modern scientific and technological development. In the early 1930s, the sheet fed relief printing press has become the main force of the printing industry. Because the printing process is discontinuous, the improvement of printing speed is limited by the equipment structure, and the speed improvement is restricted. Therefore, a continuous printing press appears, which greatly improves the printing speed. The power source of the sheet fed printing machine is a mechanical inorganic variable speed mechanism. Most of the equipment adopts the slip motor. The power source of the web printing machine is powerful. The stepless speed regulation requires a new power source, so the DC motor and silicon controlled speed regulation are produced. After realizing the automation of printing process, this equipment has successively solved the automation of paper control, folding, paper transfer, paper receiving, registration, plate loading, cleaning and other operations. However, the web press is still one or two parallel power sources, driving the realization of various movements and functions of the whole equipment through a long shaft

in the late 1990s, the technology of variable frequency speed regulation was mature in China. Printing machinery widely used AC motor and variable frequency speed regulation, followed by the elimination of DC speed regulation and slip motor speed regulation. The long drive shaft is still the traditional structure of this equipment. In the middle of the 20th century, numerical control technology, which has been widely used in the machine tool industry, began to introduce the control system of printing machinery. It is first used in web printing machines. After entering the 21st century, foreign web printing aims to design and produce a new generation of all plastic engine brush machines for the 2016 car race. The traditional power source is no longer used, and the CNC system is widely used to replace the traditional long shaft transmission, that is, the shaftless technology in the printing machinery manufacturing industry. In recent years, this technology has been applied to web intaglio printing machine, horse riding binding machine, table machine, flexographic printing machine, sheet fed paper conveyor and other printing equipment. The application of numerical control technology in China has just begun. Only a few enterprises have launched prototypes, and all the systems used are supplied from abroad. Compared with foreign enterprises, there is a large gap, and also a considerable gap compared with the domestic machine tool industry

introducing the CNC system into the printing machinery will bring the following advantages:

1. using the CNC system, the mode of connecting the whole machine drive with the long shaft is changed to the mode of single unit servo motor drive, and some functions are realized by independent motors. The structure of the equipment is greatly simplified, which not only cancels the long shaft, but also cancels a large number of structural parts in the transmission process, which greatly reduces the equipment cost

2. the long axis is cancelled, so that each unit is relatively independent and self-contained, and the connection of each unit is replaced by the virtual electronic axis, which brings convenience to the mass assembly line. The change of production mode will also change the on-line commissioning to single unit commissioning to shorten the equipment production cycle

3. make each unit relatively independent and self-contained. It makes it possible for users to purchase equipment according to their individual needs. Printing machinery enterprises can overcome the traditional production organization mode of making production plans according to the complete machine, issue plans according to the unit, and produce parts according to the unit, so as to improve the standardization and generalization level of products, and expand the functions of printing machinery deformation products and printing machinery products

4. In addition to the transmission of the CNC system, other functions of the printing machinery can also be realized by the CNC system, such as paper tension, printing registration, combination and transformation of various printing methods, cutting, die cutting, electronic cam, clutch pressure, ink balance, etc

5. The biggest highlight of the 2004 drupa printing exhibition was the introduction of JDF fully automated workflow. It links prepress, printing and post printing together in a standard form, so that the whole process of printing and Alibaba's cooperation is not just an ordinary business cooperation process. JDF is also a language. Equipment from different manufacturers can be connected into a production line through this language to complete the same task. For the full automation of the printing process, the entire transmission system must be a numerical control system

6. another advantage of adopting the CNC system is that the printing process is completely flexible. You can start and stop any unit at will according to the individual requirements of the printed product. There is no need for mechanical clutch and cam replacement. You can start the positive and negative turning as required. Several units can be used in parallel to reduce the time of printing

7. The time is ripe for printing machinery to adopt CNC system. Some numerical control technology companies have achieved continuous power output of up to 375 kW, AC voltage of V, maximum rated torque of 600 Newton meters, maximum transmission ratio of i:65000 to 65000:1, registration accuracy of 1/rev, and accurate adjustment of electronic gears of up to 32 bits. These requirements can fully meet the technical requirements of printing machinery products

II. Three major scientific and technological achievements in contemporary printing industry

1 CTP technology revolution. CTP is the highlight of the development of modern printing technology

ctcp digital technology. With the emergence and development of digital printing machine, digital direct plate making machine, digital proofing machine and digital ink-jet printing machine, the traditional plate making equipment and traditional proofing equipment are facing elimination, and the market of advertising industry and rapid printing industry is strongly impacted. The traditional printing equipment used for mass production has also been challenged unprecedentedly. A number of machine-made printing machines, plateless printing machines, laser imaging printing machines and inkjet printing machines have been industrialized and occupy a certain market share

2. digital workflow continues to develop CIP3

cip4, 7df and other digital workflow have enabled the design digital information of desktop color system to be transmitted to the plate making equipment, and then to the adjustment system of printing equipment. In 2004, drupa exhibition continued to transmit these design digital information to the post press, connecting the whole production process of printed matter, realizing resource sharing, saving a lot of intermediate links, and becoming the highlight of the new exhibition

3. numerical control technology is the development direction of printing equipment. The first two scientific and technological achievements are the revolution of printing technology, and the second one is the revolution of printing machinery manufacturing industry, which can also be called the transformation of traditional electrical control of printing machinery transmission into digital control. At present, the companies that provide numerical control systems for printing machinery enterprises mainly include Siemens, Rexroth, Lenz and Yaskawa of Japan. In addition, FANUC of Japan has not yet entered the printing machinery industry, and some foreign machine tool plants such as Japan's Dami, Mazak, Mitsubishi and Hitachi have their own numerical control systems. There are more than ten CNC manufacturing companies in China, which mainly provide CNC systems for machine tool plants. The main CNC system suppliers are: Beijing Aerospace CNC, Beijing knd company, Shenyang Lantian CNC, Shanghai open CNC, Nanjing Tsinghua general CNC and xinfangda CNC, Chengdu top and Guangtai CNC, Shenzhen zhongweixing CNC, etc. There are no manufacturers supporting printing machinery, so we should strengthen cooperation in this regard

in foreign countries, numerical control technology has been widely used. It is rare for web printing machines to adopt DC speed regulation and frequency conversion speed regulation equipment. Only a few enterprises in China have just launched prototypes using this technology, which is still a long way from the process of industrialization

III. accelerating the process of automation

since the invention of printing machinery and equipment, in the process of long-term development, it has gone through the stage from manual to mechanization. In modern times, in order to further improve work efficiency and reduce labor intensity, it has taken the road of gradual automation. Automation can be divided into the following stages:

1 In the semi-automatic stage, the main operation of printed matter is mechanized, and the printed matter still needs to be input and output manually. Such as tiger mouth die cutting machine, bronzing machine, silk screen printing brush machine, etc

2. Single machine automation phase I

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