More than hundred German corporate war CIMT2017 high-grade equipment emerge in endlessly

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)

Tianjin machine fair service north heavy industry market

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”)

Nc equipment screw gear clearance and pitch error compensation

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.

  PML1、PML2:螺距误差补偿倍率(使用于所有轴),真值见表1. BKW:齿隙补偿量,设定范围偿时,两个设定点之间的距离,即螺距误差补偿点的间隔,其最小值为8000mi\/nn(最大进给速度补偿行程=补偿间隔x127.即各补偿点参数,设定值为士7(误差值pm\/补偿倍率)。

  数对照表中参数名称的最后一位X、Y、Z、4分别代表各数控轴D二、测置方法及补偿数据的确定利用千分表测量:将千分表座固定在床身上,测头指在被测轴端面,移动所要测量的轴,使千分表对零,控制系统的位置显示也清零。用点动向相反方向移动所测轴,直到千分表指针变动为止。此时控制系统显示的位移量减去指针变动量,即为该轴的丝杠齿轮间隙。

  用双频激光干涉仪测量:正向测量数据曲线与反向测量曲线在换向处数据差值的绝对值,即为该轴的丝杠齿轮间隙。

  当间隙值达到一定值时,即精加工设备达到lOpn,粗加工设备50Mm时,请检查丝杠连接螺母是否松动。

  螺距误差补偿参数值通常测量螺距误差所采用的方法有块规测量法、步距规测量法、光学读数仪测量法以及双频激光干涉仪测量法。各单位可根据实际情况进行选择。

  需要说明的是,当电源电压及频率一定时,异步电动机的运行性能随负载大小而变化。所以合理改变负载来提高电动机的力能指标也不容忽视,这就是生产合理化节能,它是与用电合理化节能相互补充的另一个侧面。同时,企业在发展生产与市场竞争中,必然涉及调整产品结构,生产工艺创新,优化操作方式,改造或更新机械设备等问题,从而引起负载的变化并可能造成新的非经济运行。因此,电动机经济运行管理又是与企业生命共存的日常工作和长期任务。W01.10-10〔编辑武思明〕□周家健励磁发电机,给定转速nil电压负反馈电流正反馈-mIV(电流微分反馈号60年代以前生产的龙门刨床,其电气拖动系统大多采用交磁扩大机一直流发电机一直流电动机调速系统,电器控制部分很复杂,元件又多,已经老化,多属淘汰产品。给维修带来很大麻烦。近年来由于大功率的可控硅整流装置的应用,为这些老式龙门刨床的技术改造提供了可能性,但可控硅整流器价格不菲,改装一台龙门刨床的费用要十多万元,我厂有两台BQ2020型(刨台长6m)龙门刨床就是属于这种情况。我们决定自己动手对刨床的电器控制部分进行技术改造。具体内容如下:取消交磁扩大机组,用一个小功率的可控调压电源对发电机励磁,实现施动电机的调压调速,反馈控制采用转速负反馈,实现了闭环控制,因而提高了运行的稳定性和调速范围,大大简化了电器控制原理。

  刨台限位开关由原来的机械式开关改为无触点接近开关;用新型号高可靠性的继电器取代原来的老式直流继电器;取消励磁发电机,用晶体管整流器代替;删除了原控制柜内的所有体积很大的固定电阻和可调电阻,代之以三个电位器。原调速系统示意图如所示。改进后的调速系统示意图如所示。

  经过改进后,刨床控制性能大为改进,效果显著。

  简化了控制原理,提高运行的稳定性和可靠性,且故障很少;调速性能显著提高,主要是提高了低速运行的稳定性,改进后可以作为导轨磨床用;由于取消了交磁扩大机组和励磁发电机,因而降低了能耗和噪声(扩大机转速为3000r\/min,噪声频率高)。

  通过这次技术改造,我们有这样一个体会,以前人们认为要对旧式龙门刨床进行改进就必须取消发电机组,代之以一个大功率的可控整流电源,才可以显著节约电能和提高性能,其实也不尽然。据测量,机组的空载损耗占额定功率的12%~15%,即是在刨削过程中,机组大部分时间也处于轻载状况,耗能并不是原调速系统示意图很多。直流发电机组与刨台拖动电机具有同样的运行条件,结构性能和使用寿命也相匹配,所以保留发电机组是完全可行的。而大容量的可控整流电源装置不但价格昂贵,控制原理也复杂,对维修电工的技术要求相应要高,所以并不一定合算。我们的改造方案的综合费用只有2.5万元左右,所以技术性能和经济效果还是很好的。刨床使用运行了近两年,一直很平稳。W01.10-12①所测轴回原点(确定误差补偿原点)。②将测量仪器(表)及控制系统显示位置数据清零。③编制并运行自动起停循环程序(功能为:运行补偿间隔距离后,停止足以读取数据的时间,再运行,再止,循环次数为最大补偿行程\/补偿间隙)。读取并记录各数据。或利用MDI方式,每移动补偿间隔距离,读取并记录各数据。到达最大行程后,再返回测量并记录。重复测量数据记录表及处理方法(表3)1.在补偿前,记录并反复查对系统所有参数。

  设定以下参数(设定方法一般资料都有叙述)螺距误差补偿零点;螺距误差补偿间隔。

  关机并回机床原点后,进行测量。

  设定测量到的螺距误差补偿量及齿隙补偿量。

  机床回原点。

  复查并记录各参数。W01.10-11阳市彩虹路1号712021〔编辑利文〕SB理与雄魃2001NolOm

The application of DSP in ultra-precision CNC system

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.

  A.Abler提出了\u201C直接阻尼控制(DDC)算法,并以TMS320C30实现。该算法在使机床定位与跟踪控制精度达到亚微米级的同时,有效地减小了超精密机床的动态振动噪声对机床定位精度的影响。H.Yonezawaetal采用TMS320C30实现了PID+摩擦补偿控制算法,使超精密工作台高速定位精度达到0. YH-I型超精密数控系统基于ADSP2181强大的数据处理能力,实现了FuzzrPid复合控制。伺服控制系统的采样率达到2KHz.在实际运行中,该系统将每个插补周期分为10个控制周期进行伺服控制,从而对插补过程构成更为有效的控制,使曲线插补更加准确。结果表明:该方法大大提高了系统对曲线跟踪的准确性和快速性。与常规主处理器直接做PID伺服控制方法相比,伺服系统的正弦扰动减小了约60%,控制精度则有70%的提高。

  3.3DSP在刀具监控和伺服方面的应用为了对刀具进给运动中的系统误差进行补偿,YH~I超精密数控系统采用自研的压电陶瓷,以ADSP2181微处理器构成伺服结构,实现了开环的伺服控制,其原理结构为:原理结构图由于ADSP2181的快速运算能力,可以对每个插补控制周期的补偿数据进行迅速而准确的运算。该刀具伺服机构使刀具的定位精度达到了微米级,并具有良好、快速的动态新型数控机床主轴交流电机变频调速数控系统贺平、贺刚2夏秀红3(1.湘潭大学计算机科学系,湖南湘潭411105 2.益阳橡胶机械厂技术处,湖南益阳4130003.湘潭大学实习工厂,湖南湘潭41105)器输出交流电正弦波失真所造成的转矩脉动和电机损耗。

  机械工业生产中,为了加工出某些形状复杂、精度要求很高的机械零件。大家千方百计进行科技攻关,努力改进加工工艺和加工设备。特别是在提高数探机床的加工精度上,下了很大的功夫,得到较好的效果。要想进一步提高加工精度,对在机床数控系统中如何实现误差避免和误差补偿的最佳效果,仍是众目所瞩的重要途径。本文介绍的数控机床主轴转速闭环控制数控系统,采用了一种正弦波脉宽调制变频器,可以很大程度的减少数控机床主轴的转矩脉动和电机热损耗,从而提高了数控机床的加工精度。

  1机床数控系统的结构及主轴转速控制作为数控机床控制中枢的本机床数控系统,由工业微机IPC,进给控制,辅助控制和主轴转速控制四个基本部分组Dornfeld等建立了一个基于神经网络的实时系统,对刀具磨损进行监控和动态补偿,为了提高系统的实时响应,该系统采用高速数字信号处理器DSP完成数据的处理运算该系统监视刀具磨损的正确率对切削条件变化不敏感,在切削条件较大的变化范围内,正确判别率可达95%,动态补偿效果良好。

  4结语DSP由于其强大的运算能力、良好的I\/O操作功能、极高的处理速度在超精密数控系统中获得了成功的应用。

  基于DSP的PC平台上的超精密CNC系统可以使用户以很少的费用不断进行软、硬件升级,在一定时间内跟上数控技术发展的步伐,而不象封闭型系统很快就会落后乃至淘汰。DSP的应用,为超精密数控的伺服控制系统提供了良好的发展前景。从长远观点看,要达到高速、精确、容易改进的跟踪伺服控制,用DSP微处理器进行超精密CNC系统的开发是最佳的选择。