Division beauty vacates crucial to machining precision feedback

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Vertical car grinds compound machine tool to use optics and magnetism coder, send Er · Yang Sai in order to help the high accuracy production of bearing of wind- driven dynamo about the author ancient (Per Junskog) , division beauty vacates accurate grinding limited company (Sweden of smooth · of snow of benefit of; of manager of product of market of bearing of KMT Precision Grinding) (Lidköping, the precision that asks in process of grinding of Sweden) bearing raceway is the most important parameter, in order to obtain the smallest attrition, bring longer hardware from this life and reduce specific power consumption. Division beauty is vacated (the client of production bearing of company of KMT Precision Grinding) once told us, if the attrition of all bearing on the world is OK,decrease 10% , energy consumption will reduce the wastage that is equivalent to the country of size of a Brazil one year. The wheel of car and train, the turbine of power station, your freezer compressor, these parts that all including need to have turn with the smallest attrition, year answer a year, and often fall in serious exterior negative charge. A simple principle is: Attrition is smaller, save the sources of energy more. In every time quite big effect arrives since the bearing in rotating, in order to reduce attrition and the whirl that assure stability. The requirement of each working procedure in producing a course is very tall, mix in the final figure of bearing especially the exterior surface roughness of grinding, superfinishing. Division beauty is vacated (KMT) , the manufacturer of high accuracy grinder, know very well these machine the importance of the problem. The company is incorporated by UVA International AB and KMT Lidköping and become, hold water at respectively 1928 and 1875. The branch after sell and making work distributings to be mixed at the United States, China Germany. The new machine tool, production factory that transform and maintains the job to be located in Sweden, renovate the job of the machine tool to also be finished in Indian Gu Ergang at the same time. Get used to client family beauty to vacate (the spare parts grinding that KMT) machine tool applies at bearing industry in a century in the past, develop advanced technology to differ in order to suit ceaselessly during this the client's application. Nowadays, the industry that wind report grows this becomes division beauty to vacate (the domain that KMT) key pays close attention to " our client is in our follow the development of new market " , thoms Kaersen, division beauty is vacated (KMT) presiding apparitor (CEO) respecting. "The client that becomes us undertakes dilate in the domain of wind- driven power station when, the bearing of new type is need. We are accompanying them over, grind give out new machine tool in order to satisfy their need. " in unit of turbine of a wind- driven power station bearing is located in different position, for example: On variable blade device, turbine wheel shaft and gear-box. Ideal is bearing can work normally, hold Mass respecting in the palm, the circumgyrate with more flowing turbine and the ability loss with mechanical smaller part. Revolving variable blade passes a diameter about the same 4 meters bearing receives turbine wheel shaft repeatedly. The bearing ferrule of this dimension is made the same score by benefit snow (grinding of Lidköping)VTG4000 vertical grinder, make material machines next getting in optional grinding and turning combination proper outline external form. Critical process Ka Ersen emphasizes this craft having much key, say " grinding craft decided raceway (the position that sets scroll system) how much can precision achieve. This precision decided attrition is mixed from this and the generate electricity accuracy that come. But the high accuracy output that the bearing of high grade grinding brings makes reduce specific power consumption to become a possibility not just, also raised their dependability at the same time. " fall in blast load stress, if variable blade is placed,go up to wrong axis, this will cause serious consequence, ka Ersen explains. Vast power can loosen blade, and, the worst situation is, this wind- driven power station can collapse. Bear turbine variable blade passes the force wind-force of wind assemble a diameter the biggest join to 4 meters bearing turbine wheel shaft. The bearing ferrule of this dimension makes the same score by benefit snow (origin of Source of grinding of Lidköping)VTG4000 vertical grinder: KMT Lidköping. "Adjust blade paddle is apart from is one of functions with the most crucial movement of wind- driven turbine, through using our VTG4000, in adjusting an orgnaization giant bearing can undertake high accuracy ground make with the precision level that only normally small part ability reachs right now " , eive Johansson respecting, the presiding stylist of KMT Lidköping. "The machine tool integrated advanced athletic system, configuration optics and magnetism reach angle coder to be in order to come true in crucial axis on the spare parts diameter of 4m point-blank appearance deviation is less than 1µm. This is good car and grinding, and be very necessary. " the change of the outline that outline deviation is need pointing to place. For example: Ball bearing raceway groove, its change is from a perfect circular arc. But the deviation that actually it can be any forms, include linear, of circular arc, wait a moment elliptically. The fame in the Lidköping in bearing machinery business is high speed and rate of tall metal place to go from beginning to end. The implementation of these ability is the rigid design that adopts Lidköping machine tool, the stiffness with every inherent element in affirming structure of a machine tool, when combining these elements, promoted integral productivity. Fixed position and precision of quality fixed position are very important, the bearing character with treatment hind is direct and relevant, johansson is stated. Before VTG4000, the biggest machine tool of the company can cover spare parts diameter the biggest to 600mm(24 In.

) , but the diameter that VTG4000 machines exceeds 4000mm (157in.

) , it is the dimension of bearing of the biggest wind- driven turbine, offer good precision at the same time. What the linear electric machinery on Nextpage linear axis makes VTG4000 fast, firm is static press slideway to increase precision. Accompany static press slideway, pressure oily infuse arrives between fluctuation slip slip goes up since float, form to be mixed without attrition almost tall response slip system. "The machine tool of standard measure, ball guide screw is used on the axis, maintain about the appearance deviation of 3-µm " Johannson explains. "This machine tool maintains appearance deviation to be less than 1µm, and feed resolution 0.

1µm. " the core that linear slip is Lidköping machine tool, the liquid is static press slip, the union of hermetic seal and linear electric machinery produced tall tigidity, high accuracy, the system of maintenance-free. Control of variable blade of turbine of high quality promotion changes the point of view that paddle bearing allows wind speed of basis of lamina of wind- driven turbine to optimize oneself or stall condition produces in fresh gale, this kind of large bearing is machined after accordingly the dependability of this kind of bearing decided VTG4000 of efficiency and safe operation multipurpose is designed to use second setting directly, carry out the turning of head of two substantive works and grinding. Two jobs head can be decorated afresh according to need, normally the circumstance issues grinding / turning or grinding / grinding. Machine tool 4.

The move that prop up is in the X- axis of 5m two spare parts jobs relative to side first, allow grinding and turning tool to approach a part. Exceed 35 tons when weight of a few spare partses, VTG4000 special be able to bear or endure to be out of shape and heat up change, have the aid of controls hydraulic pressure oil and implementation of cooling fluid temperature this at rigor. Heavy-cut grinding / system of high resolution grinding / Zun Dongzhu uses liquid of drive of linear electric machinery static press slip, vertical distance: 860mm, transverse journey: 2460mm, the biggest acceleration: 1m/s2, the oldest rate: 1m/s. Resolution: 0.

01mm, configure origin of Source of servo of coder of linear electric machinery, high resolution, closed circuit: KMT Lidköping " we take the place of from 1970 begin to use a liquid static press slip to replace scroll slideway, undertake they and linear electric machinery combinative we were brought again faster, more high accuracy, bigger add, reduce rate, " respecting of plant manager Jörgen Möller. "The finger that sees when you you can use you makes 25, when the runner shaft coming back of 000kg moves, you can realize the liquid is static press a system to have how outstanding. " the athletic precision of 4 main slip builds the high resolution coder that configures feedback of complete closed circuit in Siemens linear electric machinery. The liquid is static press slip to near 0 clash, seeing coder in order to realize first time of freeboard precision Johansson be installed finally without any crawl is the EMO exhibition 2007 on VTG4000, lidköping passes strict test to sensor. "We compared different grating rule to assemble our referenced slip to go up, chose show the most outstanding that, "Johansson respecting. "Important is uniform encoding implement successive length at least 4.

5 M, and should very strong fight contaminative ability, leinishao (the optimal choice that the SiGNUM series of Renishaw) is these requirements. We had installed them 4 all linear slip, and did not go out show any issues. Our circumgyrate workbench has same design principle, radial of configuration hydraulic pressure and axial bearing, empty hermetic seal and moment of force are motor. The pitching moment motor of circumgyrate workbench has coder of a high resolution to be used at servo closed-loop control. We did similar analysis to choose SiGNUM angle coder.

"Coder conduces to angle of set grinding main shaft likewise, a very main machine tool function, anyhow, use again static pressure / the freeboard precision of slip of linear electric machinery, the angle that any exceeding will undertake fine tuning during emery wheel nap. Leinishao (the installation of magnetic angle coder of Renishaw) is on the B- axis of wheelhead. These coder expose the slashing condition at machine tool environment to fall, design of optics of their blame contact, blame and IP68 are sealed, ensure they are avoided suffer cooling fluid and the effect that cut bits. Number or the journey that imitate outputs LM10 to allow to achieve 100 M and the high speed exercise that achieve 25 M/s (4 M/s is in 1µm resolution) . Coder configures the LED of a compositive setting, quickened installation and changing need to install environment or oscillograph miscellaneously in order to use Yu Fu so. "Leinishao (Renishaw) coder a the biggest characteristic is they are installed very easily, "Johansson complements. "Of the grating rule that accompanying attach decorate with reading head nearby, indicator light makes case of two parts connection can be observed easily. Other trademarks already also were used, however, we like Leinishao (the tall wear that Renishaw) product installs easy, high resolution and complex environment to fall as a result of it.

"The working coordinate that sets the part the machine tool for accurate ground is, VTG4000 uses Leinishao (the osculatory bougie that wireless signal transmits Renishaw)RMP60. After installation of semifinished product spare parts arrives on the machine tool, RMP60 from the mount inside knife library, use the exact position of main feature. This data is used to the coordinate system in updating a loop, in order to be used at fast and accurate treatment. Leinishao (before Renishaw) contacts bougie to be used at treatment, measure with the spare parts after treatment. The position that indicates workpiece accurately and condition are measured before treatment, and its mental allowance, out of round is spent etc, and be measured below the line later evaluate good car and / or the result after grinding. English edition links ground connection site: Http://www.

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