On March 5, 2013 afternoon, party of Zhu Jianfeng’s minister reachs ministry of collaboration of international of group of assorted of Chan Xilin of general manager of DMG of Han Nuo of president of German DMG Asia, Beijing, general the company looks around make an on-the-spot investigation. The leader such as Liu Yan of Jiang Hua of company general manager, chief engineer welcomed honoured guest enthusiasticly. In Jiang Hua the accompanying of the leader such as general manager falls, han Nuo visited company exhibition hall to reach above all all right assemble a workshop. Producing the spot, industry of index of the function of the product of core competition ability such as lathe of gear-hobbing machine of machine tool of the machining center of horizontal of high speed high spirit that dot of ginger gross weight makes to company production, coordinate, numerical control, numerical control, main technique, application and domain undertook introductory. After Han Nuo is looking around, to me the product of the company gives reputably, hope both sides will be strengthened henceforth medium cooperation is produced in the machine tool.
Reporter on September 7 from 2011 grinder advanced make with the know on innovation technology seminar, limited company already made plant of Shanghai machine tool countrywide machine tool finishs national science and technology in production monomer enterprise great and special most enterprise, sales revenue can break through 1 billion yuan this year.
The machine tool is weighed for machine tools, the grinder that assumes a metal to machine last working procedure is called its technical level decides the artwork in master directly product precision. Current, domestic grinder year consumption makes an appointment with 10 billion yuan, among them 70% support entrance. But long-term since abroad executes block to the core technology of grinder industry and crucial part. Factory of Shanghai machine tool specializes in grinder, begin to carry out from 2009 and finish a series of country science and technology great and special.
The OK and relaxed freely that factory of Shanghai machine tool makes processes 250 tons of work exceed grinding machine of roller of heavy-duty and rigid numerical control, weight exceeds 300 tons. Do not think this big guy is only able rough work, it is actually artful can embroider can machine a diameter not only 2.5 rice, length 15 meters top class workpiece, and the 1/8 that precision can achieve silk of a hair. Grinder of numerical control of miniature of precision of accept rice class is be used at war industry and aerospace industry exceed accurate grinding equipment, fixed position precision is less than or be equal to 100 accept rice, repeat fixed position precision to be less than or be equal to 50 accept rice. Volume is not large it, as the magic square of an OK and free roll, size range of pipe bent is very wide, but concave and convex and curved surface of grinding treatment freedom, spherical, torus.
Stone light tells general manager of plant of Shanghai machine tool the reporter, the enterprise strives for 925 end to achieve sales revenue 2 billion yuan, among them home market of grinder of large cylindrical grinder, large crankshaft is had rate more than 60% .
1. Horn contacts domain of main shaft of ball bearing report
Home has a level: In machining center and respect of main shaft of report of numerical control milling machine, luoyang bearing institute developed oil gas to lubricate model main shaft of machining center report, rated power and 22kW of highest turn up, 24000r/min; Main shaft of report of the permanent magnetism synchronism that Hunan university develops machining center, rated power 35kW, 18000r/min of top rotate speed, radial round jumpy 1.5m, g0.4 of dynamic balancing precision, deploy HSK – A63 knife handle, use oil gas to lubricate with compulsive water-cooling means. Ball bearing of pottery and porcelain of high-power of high speed of development of Shenyang building university highest turn up reachs unit of electric main shaft 30000r/min, power amounts to 20kW; Those who develop development without unit of main shaft of report of complete pottery and porcelain of inner ring type top rotate speed achieves 30000r/min, most high-power achieves 15kW, circumgyrate precision 1m. Grinding respect of the main shaft that use phone, value of Dmn of product of main shaft of Luoyang bearing institute achieves 170 ～ 2 million Mmr/min; Bearing ferrule grinds the main shaft that use phone most high-power is amount to 32kW (S6 ～ 60% ) , top rotate speed is 120000r/min; Path board grinds Gao Tie course to amount to 150kW with electric main shaft (S1 ～ 100% ) , 2000r/min of top rotate speed; Working life general is ubiquitous 1500 ～ 2000h.
Level of international advanced technique: In machining center and respect of main shaft of report of numerical control milling machine, the grease on international is lubricant model machining center uses electric main shaft top rotate speed is 60000r/min, oil gas is lubricant model numerical control mill is highest rotate speed is 140000r/min, and the power of high-power report main shaft can amount to 80kW, rotate speed is 10000r/min, its are the biggest torsion can amount to 380Nm. Grinding respect of the main shaft that use phone, the bearing Dmn value of product of international main shaft is as high as 2.4 million Mmr/min, choose oil gas lubricant means, output power is global than going up generation product increases 50% the left and right sides, its work life also grows 50% generally to control.
Machine tool of national numerical control weighs target of old special technique: Rated power and top rotate speed are ① 50kW, 20000r/min (it is 30kW, 30000r/min and 10kW, 40000r/min twice additionally) . ② has bearing trends to be tightened beforehand adjust a function. 5000h of time of ③ average failure free operation. 1.0m of ＜ of precision of circumgyrate of ④ main shaft. 300Nm of stiffness of ⑤ shafting all. Class of G0.4 of precision of ⑥ dynamic balancing. ⑦ constant power 14. Limits of wave motion of ⑧ rotate speed 0.04% the following. Buy of ⑨ C position of axle controls precision 10. Interface of coder of ⑩ high resolution can support 17 coder most (131072 pulse / R) . 11. Have interface of bus line of two kinds of spots.
2. Liquid (move) static control territory of bearing report main shaft
Home has a level: The liquid that Shanghai achieves limited company of main shaft of accurate machine tool to develop formerly (move) the static main shaft that suppress report, rated power and top rotate speed achieve 34kW, 8500r/min, radial and jumpy 1m. The liquid that firm of Oriental seed profit produces (move) the static main shaft that suppress report, rated power / top rotate speed achieves 17kW, 8000r/min, radial and jumpy 1m, radial stiffness 500Nm. Hunan university is aimed at the circle outside exceeding high speed / camshaft grinder developed liquid of type of the buy inside electromotor (move) the static main shaft that suppress report, rated power and 35kW of highest turn up, 10000r/min, radial circle is jumpy 1m; Still be aimed at grinder of the circle inside high speed at the same time, developed activity of liquid of type of the outfit inside electromotor of 12kW, 30000r/min to press electric main shaft. The limited company of Beijing northing nicety of subordinate of Beijing aerospace university developed set (move) static control main shaft product, rated power and top rotate speed achieve 7.5kW, 48000r/min, circumgyrate precision can achieve 0.5m less than. Inside the circle is ground (move) static control main shaft aspect, home already produced turn up 20000r/min, the main shaft product of 28mm of main shaft diameter. At present domestic liquid (move) static the circumgyrate precision that presses main shaft is the most high-energy achieve 0.1m.
International is advanced level: German HYPOSTATIK company develops outside the round main shaft that obliterate report, top job rotate speed is 7600r/min, power is 50kW, 320Nm of emery wheel radial stiffness; Cam grinds main shaft of concave side grinding, rotate speed 25000/35000r/min, emery wheel radial stiffness is 120/60Nm; Milling is static the main shaft that suppress report, top job rotate speed is 42000r/min, power is 15kW, bearing stiffness is 200/160Nm.
A few days ago, inc. of Guilin machine tool held technology of numerical control lathe to compare fierce activity greatly. Since this year, face financial crisis influence, this company clutchs favorable opportunity, held early or late inside entire company limits ” technical backbone grooms class ” , ” middle-level administrator grooms class ” , and begin assemble labour of benchwork, lathe work, electrical engineering, crane to wait for set technology the match and technology earth up training exercise to benefit the internal organs, thrust moves broad blueness labour to learn technical upsurge, for next look forward to firm pick up next dozen of solid bases.
Japan this the shift of main shaft workbench that big nice development went compound process capability to get rising automatic lathe ” ST-38 ” , will begin to be a center to undertake selling in the whole world with Euramerican market from June 2010 (graph) . New product deployed 3 to turn tower knife stage, can control independently respectively. Can pass turn a variety of tools that install on tower knife stage, the cutting that has the different sort such as turning, bore and milling at the same time works, shorten thereby handling time. In basically be being used at machining medical treatment, car and aircraft industry domain, use, the complex form part that through the difficult cutting such as titanium material makes. Deploy turn tower knife stage has two is the front treatment is special, one is rear treatment special. Openly treatment appropriative turns tower knife stage clips workbench of openly main shaft to configure advanced face and interior, because the side before this can control 3 axes, inside can control two axes. Rear treatment appropriative turns tower knife stage also can control double axis. Turn the face of tower knife stage (installation tool cover) number all is 10. Rear side and openly side are same, also can have compound treatment. Besides use many turn outside tower knife stage, still be shorten handling time and used a name to be ” Star Motion Control System ” control means. Its method is choose beforehand and be close to (approach work) the tool that the next in workpiece cutting process uses, in make the tool is retreated from inside workpiece while, control workpiece enters the cutting of next tool, shorten thereby blame cutting time. Pass these improvement, handling time will shorten more on average than before 7 ％ , the biggest shorten 17 ％ . If will machine a diameter the biggest if enlarging 38mm, still can support the work with thicker diameter. Belong to in shift of main shaft workbench automatic lathe ” the biggest treatment diameter ” (this big nicety) . The price is 30.66 million yen (contain tax) .