April 17 solstice 22, as China’s machine tool industry is the most important trade show, the 15th China international machine tool exhibition held in Beijing.In this exhibition, about two hundreds of German company show the enterprise strength, and brought about the industrial under 4.0 times of advanced products, solutions and services.China international machine tool exhibition in 2017, the German pavilion crowded area for a German machine tool enterprise, the enterprise representatives and the audience talk German machine tool manufacturers’ association (VDW) economic minister haarde & middot;Hine (Gerhard Hein) on April 18, said at a news conference in participating in the German companies, some of them won the German federal economic affairs and the department of energy’s support, in the German pavilion pavilion (Germany), the rest of the enterprise on its own exhibition pavilion (Germany).Their booth net area a total of more than 8000 square meters, become the largest foreign countries on the exhibition pavilion.He pointed out that: & other;This confirmed the German manufacturer will China as the most important export destination firm commitment.Not only do they think of themselves as supplier, also sees itself as a partner.In & lsquo;Made in China 2025 & rsquo;Under the framework of China is under the background of vigorously promote manufacturing quality, German technical expertise is not only worth the global operations of large enterprises to actively use, small and medium enterprises can also benefit a lot from it.Throughout the &;Germany advanced machine tool technology, represent the innovation, quality and reliability.German machine tool company has accumulated rich technical experience, also has the international industrial users, one of the most important is the automobile industry and their parts suppliers, as well as mechanical engineering, electrical engineering industry, metal processing industry, aircraft and rail vehicle manufacturing, shipbuilding industry, medical industry, etc.In the 15th China international machine tool exhibition, the German pavilion, many German machine tool manufacturers will highly intelligent assembly line into the exhibition hall, can let the audience see visually industrial robots live on pipeline operation.It is worth mentioning that several of the German machine tool enterprises is also leading supporter of German industrial 4.0 strategy and core members, and each enterprise under the industrial age 4.0 production and management mode are different.As a result, the press conference on April 18, three German machine tool enterprises 4.0 representatives introduced their respective industry solutions.Germany, for example, through fast group had more customized production according to the need of future customer area for a German machine tool enterprise, the enterprise representatives and the audience.Development trend of the product, make sure the new industrial mode will be information and production status of transparent, rely on decreasing for labor, and manufacturing to the company’s industrial solutions determined to be 4.0 & other;Manufacturing & throughout;.To this, haarde & bull;Digital networked production, Mr Hain says, and can be used to challenge and opportunity coexist in industrial 4.0 solutions.In the full coverage of the whole order processing process automation and process troubleshooting, there is a huge potential.& other;We can imagine, using comprehensive network solutions to achieve double-digit growth efficiency, help them stay ahead of the competition.But this is the basic precondition of capture and analysis of mechanical and process data.To this end, we need from mechanical equipment series of flexible IT infrastructure to the cloud platform, to ensure that even smaller manufacturing companies can afford IT.In this respect, however, still exists some obstacles, including unresolved or has not been unified production network problems, such as interface standardization, data security, the sovereignty, responsibility, staff skills, labor legislation, etc.Throughout the &;Mr Hain said.(the original title: exhibitors made landfall in Germany in 2017 China international machine tool exhibition) (source: Beijing weekly)
With the deepening of the integration of the beijing-tianjin-hebei region, the industry pattern of manufacturing industry to accelerate the restructuring, accelerate the transformation and upgrading of industry, promote the orderly industrial transfer to undertake, to build advanced manufacturing base of the construction of the industrial integration platform is imminent.A few days ago, sponsored by the tianjin zhenwei exhibition co., LTD., the 13th tianjin machinery expo expo) (hereinafter referred to as tianjin machine in meijiang convention center.The exhibition, which is based on the equipment manufacturing industry of tianjin market, shows in recent years, the high-end products and technology in the field of industrial machinery and equipment, makes every effort to promote the development of industrial markets in north China.Load demand at home and abroad enterprises to actively participation as an important show service heavy industry in north China market exchange platform, the bearing industry found that demand, tianjin machinery expo has attracted a large number of well-known enterprises at home and abroad.Shenyang machine tool, shandong forever China, baoji machine tool, a Beijing, shenghua hengfeng, inscription, forging machine tool enterprises shows the nc machine tools, horizontal machining center, gantry machining center, hydraulic presses and other equipment and technology.Highlighting the expo platform effect, international business field.From the United States, Germany, Japan, Taiwan and other countries and regions of nearly thousand well-known brands at present.Among them, the United States haas as one of the world’s largest manufacturer of CNC machine tools, the global top 10 CNC machine suppliers, for five consecutive years at tianjin machine expo, embodies the vast market space in China north industries.Comply with the demand of manufacturing industry development in recent years, the exhibition attracted a great nation, bond, macro mountain, such as rapid laser nearly hundred famous laser enterprises at present, some enterprises of product represents the highest level in the development of laser industry in recent years.Industry segments numerous buyers pay close attention to tianjin machine expo industrial manufacturing industry chain, fine division of the metal processing, CNC machine tools, metal molding, sheet metal, welding and laser hardware, industrial automation, and other professional exhibition, exhibition equipment more than 2000 sets.More than eighty percent of the equipment with independent intellectual property rights, the attention of many buyers.Deal with auto equipment, aerospace, biomedical, ports and other research and development of advanced manufacturing bases construction need, exhibitors at the high-end CNC machine tools, metal molding equipment, the forging\/rolling technology and equipment, such as power base construction and development.With the adjustment of industrial structure, represented by information integration and laser manufacturing of advanced manufacturing technology, with its high efficiency and low cost such outstanding advantages, more and more wide application in the manufacturing space.Into the pavilion, many enterprises of laser manufacturing site equipment & other;T & throughout;To show equipment more than 1000 sets.& other;In recent years, laser equipment gradually popularization, many companies will use laser cutting machine, customers also increased year by year, aerospace, medical equipment, kitchen utensils and appliances and other industries, have our cooperation.Throughout the &;Bystronic di can laser the relevant person in charge of Beijing branch ShenLin said, & other;Because the use of laser cutting, as long as have graphics, anytime, anywhere can operation, compared with the traditional way not only to eliminate the previous many working procedure, will also be able to replace artificial, save some cost.Throughout the &;& other;The exhibition is to hope to be able to cope with the tianjin automobile equipment, aerospace, biomedical, ports and other research and development of advanced manufacturing bases construction needs, promote transformation and upgrading of industry, and to the industry value chain of the high-end climbing.Throughout the &;Conference organizers said the relevant person in charge of tianjin zhenwei exhibition co., LTD.(the original title: tianjin machine expo service north heavy industrial market) (source: “China trade news”)
Gland S pitch error between
– XiaoNaiKuan qiao park of nc equipment screw gear measurement point table 1 table 2 mm revised mm position position error after error correction (measured) mm mm mm average error compensation value compensation data average positive direction negative direction positive direction negative direction ABCDEF = D – CG – CH = = E (F + G) \/ 21 = H\/X as the extension of time, the numerical control equipment used screw, gear clearance and have been great changes in the pitch error.To maintain the machining precision of numerical control equipment, precision testing of equipment on a regular basis and the nc equipment backlash and pitch error compensation, has become an important task to strengthen the management of equipment in the late.
0 – MD, for example, talk about the backlash and pitch error compensation method.
a, the parameters related to compensation and suggests the direction and initial backlash compensation set, as the positive direction, 1 negative direction.
the greatest characteristic of ultra precision machining is new achievements in the development of integrated application of machinery, and at the end of the modern electronics, measurement, computer and other new technology is the result of mechanical and electrical integration, now has become one of the important development direction of mechanical manufacturing.Ultra-precision machining depends on the development of precision machine tools, thus a key part of the ultra precision machine tool shearing section.at precision servo control and super precision measuring system as well as the integration of processing and measuring is widely attention and development.In recent years, the development of microelectronics technology and computer technology has become a technology base to promote the development of servo control technology to high performance.
with the development of large scale integrated circuit technology, DSP chips got rapid development, in signal processing, communications, radar, remote sensing, voice and image processing, electronic measurement, automatic control and many other fields has been widely used.
in terms of ultra precision machine tool servo control, to make the machine table to achieve sub-micron precision linear motion, the introduction of modern control technology is very necessary.
fine control unit, to achieve continuous feed small procedures section, has become the significant characteristics of ultra-precision CNC machining, ultra precision nc interpolation cycle has reached millisecond.Large amount of data, high precision of interpolation operation and control, the computer system can react to processing instruction at high speed, high speed processing and calculate the amount of the movement of the servo motor, then sends out control instructions.DSP data capacity is as high as dozens of MIPS, at the same time, the instruction cycle short as a few nanoseconds, is very suitable for large amount of data of high-speed data acquisition system and real-time control system.Applying DSP to the development of high-performance ultra-precision CNC system is a good strategy.In fact, DSP microprocessor in the ultra precision servo control system, compensation and fast servo tool detection device, machine protection has a successful application.
design and development, and a success.Its core is the ADSP2181 chip, interpolation cycle 5 ms control cycle is 0.5 ms, programming resolution of 2 nm, are the basic conditions of the actual working condition of application.
2 the typical performance of digital signal processor is the main application of the digital signal processor device to quickly achieve a variety of digital signal processing algorithm in real time.As a typical DSP device, the function of ADSP2181 structure as shown.The typical has the following properties: piezoelectric ceramic diamond tool servo device error compensation table in an instruction cycle can finish one multiplication and addition;Program and data space apart, can access instructions and data at the same time;On chip is fast RAM, usually through a separate data bus in two pieces of access at the same time;Fast interrupt processing and hardware I\/O support, more than can be executed in parallel operation;Support pipelining, so take the operation can be overlapped, decoding and execution, etc.
adsp2181 chip of MAC (once – times of multiplication and addition time has reached 33 ns chip has reached more than 200, the number of pin pin number increases, the increase of the mean structure flexibility, such as external memory expansion and communication between the processors.At the same time, the development of DSP chip, the cost of the DSP system, volume, weight and power consumption are reduced greatly.
– a has a good and efficient development tools and assembly language support.ADSP2100 each series provides tools to compile and connection, to generate an executable file, executable files can be written to the DSP program storage area.DSP with simulation software, can run the program, the interrupt simulation, timing, etc, which has a great convenience, very suitable for numerical control development needs.
3 application of DSP in ultra-precision CNC system CNC system can be divided into two types of single processor and multiprocessor.Single processor system with a single CPU as the control core, all functions are carried out by a CPU time, and the software programming is complex, the machine tool feed rate have also been affected.Multiprocessor system is a typical master-slave CPU structure, the main CPU to complete the front control, namely the man-machine interface management, information display and pretreatment, etc;From the CPU to complete the background control the interpolation arithmetic, servo control and feedback processing, such as work, responsible for frequent data computation and I\/O operations.
very short interpolation cycle of ultra-precision CNC system, interpolation interval is small, its control and interpolation arithmetic fairly frequently, and numerical control system in a very short period of time of each axis position of feedback signal processing, the current has reached millisecond interpolation cycle.Single processor CNC system is difficult to achieve such a fast data processing speed, thus make multiprocessor systems using become inevitable.DSP devices because of its powerful data capacity and high speed, for the development of ultra-precision CNC system, is a good choice, and advanced control algorithm used in ultra-precision CNC system.
as a matter of fact, DSP device in the servo control of ultra precision CNC processing, compensation and fast servo tool monitoring, advanced control algorithm USES in such aspects as machine tool protection systems and has a broad and effective application.
3.1 the servo control system based on DSP high speed DSP microprocessor, can realize high precision position servo control superfinishing machine and contour machining control, at the same time provide the heating effect of the machine tools and cutting tools and geometric error compensation and control.Such as Faunc15 – BCNC system USES has 33 MHZ double-precision 64 words long MC68EC030 double CPU microprocessor implements has 1 nm high-speed CNC control system, the high precision contour machining control, automatic feed rate control to ensure the machining path within the allowed error range of the specified path.
, completed the basic workflow ADSP2181 are: read the instruction location, and form a new trajectory calculation, query and deal with external events, to control actuator movement.
using master-slave multiprocessor structure of ultra precision CNC ADSP2181 are 16-bit word length, can be in 33 ns to finish any instruction.Due to the high operation speed, the system of the interpolation period sampling and control cycle to 2 ms and 0.5 ms respectively, the real time and greatly improve the agility of the system.Correspondingly, the control accuracy reached 0. In the process of m, and regular host control, compared to the machining precision of interpolation control cycle integration, comprehensive index greatly improve precision.
3.2 DSP high speed high performance microprocessor control algorithm, especially the application of digital signal processor (DSP), many advanced control strategies and methods, such as adaptive control, learning control, friction control, etc., are used in high precision servo control system, greatly improving the control accuracy and rapidity.