Zahnspindeln Gear Spindles Maina Indukont

 

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Zahnspindeln Gear Spindles Maina Indukont

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GEAR SPINDLES ORGANI DI TRASMISSIONE 197 D

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Technical Data ORGANI DI TRASMISSIONE Series Mill Gear Tooth Shape & Design Crowned FLANKS To maximize the gear spindle performances, the gear tooth design must be optimized, according to the following parameters: * Max angle of misalignment (under load) * Max angle of misalignment (at roll change) * Max operating torque * Peak operating torque * Type of drive (unidirectional or reversible) The hub teeth have crowned flanks. This prevents gear tooth endloading, reduces contact stress and increases the contact area. The amount of flank crown, based on the maximum angle of misalignment (usually at roll change), is optimized to obtain the minimum backlash, using specialized computer programs, verifications by 3-D modeling system and Finite Elements Analysis. Root Fillet Crowned Tip Chamfer Crowned Tip Radius Crowned Flank Crowned TIP The tips of the teeth are crowned with a radius equal to the one of the mating internal gear. The crowned external tip which is in contact with the root of the internal gear tooth, assures an accurate radial piloting, with concentric sphere/cylinder action. This enables minimum diametral clearance, which, by centering physically the internal and external gear teeth, assures good dynamic balance characteristics under all loads, speed and misalignment conditions. Root Radius equal to Crowned Tip Radius Root Fillet Crowned CHAMFER Faces of the external teeth adjacent to the tips are chamfered by suitable cutting tools to eliminate interference with the internal teeth root fillets. At the same time this assures the total contact of the gear tooth flanks and freedom to misalign. Also the internal gear tip is chamfered to avoid dangerous vibrations during teeth movement. Tip Chamfer Gear Tooth Materials & Heat Treatments Any gear spindle coupling component operating for the torque transmission is manufactured from special alloy steel and is heat treated. The selection of a proper combination of steel and heat treatment, depending on the stressing level and the required operating life, can be: Type A - X38CrMo V51 * SGNG Type X38CrMo V51 alloy tool steel core hardened and tempered with final heavy duty nitriding cycle Surface hardness > 1100 [HV] Gear teeth ground before and after nitriding Type B - 18NiCrMo5 * CHG Type 18NiCrMo5 alloy steel case hardened and tempered Surface hardness > 625 [Hv] Gear teeth ground after case hardening and tempering Material Type Load & Shock Intensity Working & No Load Angle Operating Speed Operating Temperature L M H V L M H V L M H V L M H V Type C - 31CrMo12 * SGN Type 31CrMo12 alloy steel hardened and tempered and special gas nitriding cycle for high depth Surface hardness > 750 [HV] On request: gear teeth ground after gas nitriding A B C D L = Light M = Medium H = Heavy V = Very heavy Type D - 42CrMo4 * NGN Type 42CrMo4 alloy steel hardened and tempered and normal gas nitriding cycle for standard depth Surface hardness > 550 [HV] 1

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Technical Data ORGANI DI TRASMISSIONE Series Mill Mill Spindle Size Selection After a pre-selection made on the basis of the required design and of the available space (min. Roll Diameter), check that the final selection complies with the following conditions. Tab. 01 Steel Mill Type One Way Cold Mill & Aux Equipment Reversing Cold Mill One Way Hot Mill Reversing Hot Mill Service Factor K1 Factor a ) Rated Torque Check The rated torques, Tk and Tf, shown in Tab. 03, correspond to the torques to be transmitted by the gear elements based on load angle = 1.5° and service factor K1 = 1. a1 ) Check the Preliminary Selection by comparing the rating torque revised according to the proper factors with the continuous torque required at the max load angle. Tk · K2 (Tab.02) K1 (Tab.01) ≥ Td where: Td = N · 30 n·π and : K1 1.50 ÷ 1.75 2.00 ÷ 2.50 2.25 ÷ 2.75 3.00 ÷ 3.50 Tab. 02 Misalignment Factor K2 Load Angle [deg°] 0.50° 1.00° 1.50° 2.00° 2.50° 3.00° Factor K2 1.40 1.20 1.00 0.80 0.65 0.55 Tk Td N n [kNm] [kNm] [kW] [RPM] = = = = Fatigue Torque - (Tab. 03) Continuous Torque per spindle Motor Power per Spindle Base Spindle Speed a2 ) Besides, check that : Tf · K2 (Tab.02) ≥ Tmax where: Tmax = N · 30 · TAF n · π · 100 and : Tf Tmax TAF [kNm] = Peak Torque (90% Yield Limit) - (Tab. 03) [kNm] = Max Continuous Torque for each spindle [%] = Torque Amplification Factor a3 ) After selecting the size, check that the minimum Roll Diameter is greater than the M1 Roll Head diameter (Tab. 04) and the M2 Pinion Head diameter is smaller than the Pinion Centers. Tab. 03 Material - type A X38CrMo V51 * SGNG Base Peak Torque Torque Torque Capacity at 1.5 degrees misalignment Material - type B 18NiCrMo5 * CHG Base Peak Torque Torque Material - type C 31CrMo12 * SGN Base Peak Torque Torque Material - type D 42CrMo4 * NGN Base Peak Torque Torque Size 22 23 24 25 27 28 29 31 32 34 36 37 40 42 44 46 48 51 53 56 59 62 64 67 70 74 77 80 Tk [kNm] 369 429 488 534 674 775 846 915 1206 1380 1516 1638 2285 2620 3010 3280 4030 4610 5060 5470 6770 7320 7920 8550 10980 11840 12770 13690 Tf [kNm] 922 1072 1220 1335 1685 1937 2115 2287 3015 3450 3790 4095 5712 6550 7525 8200 10075 11525 12650 13675 16925 18300 19800 21375 27450 29600 31925 34225 Tk [kNm] 226 267 290 316 417 462 502 543 751 826 897 970 1402 1633 1792 1945 2505 2755 2995 3240 4010 4335 4680 5035 6480 6990 7520 8070 Tf [kNm] 565 667 725 790 1042 1155 1255 1357 1877 2065 2242 2425 3505 4082 4480 4862 6262 6887 7487 8100 10025 10837 11700 12587 16200 17475 18800 20175 Tk [kNm] 143 171 186 201 262 295 320 345 474 529 572 618 885 1030 1145 1239 1576 1764 1905 2060 2555 2760 2970 3180 4110 4425 4745 5085 Tf [kNm] 357 962 465 502 655 737 800 862 1185 1322 1430 1545 2212 2575 2862 3097 3940 4410 4762 5150 6387 6900 7425 7950 10275 11062 11862 12712 Tk [kNm] 100 120 130 139 184 205 222 239 335 369 396 428 617 730 794 860 1113 1225 1320 1425 1770 1912 2048 2185 2835 3050 3260 3490 Tf [kNm] 250 300 325 347 460 512 555 597 837 922 990 1070 1542 1825 1985 2150 2782 3062 3300 3562 4425 4780 5120 5462 7087 7625 8150 8725 2

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Technical Data ORGANI DI TRASMISSIONE Series Mill Spindle Assembly AB Spindle Assembly EF External Hub Retainer Floating Ring with Lip-seal on Hub Flat Wear Plate M1 Spring Loaded Unit Thrust Button M2 Spindle Head type A DBSE (as request) Spindle Head type B Internal Hub Retainer Floating Ring with Lip-seal on Shaft Flat Wear Plate M1 Spring Loaded Unit Thrust Button M2 Spindle Head type E DBSE (as request) Spindle Head type F Tab. 04 Dimensions [mm] Roll Sleeve Pinion Sleeve SPINDLE HEAD TYPES A - B - E - F Size 22 23 24 25 27 28 29 31 32 34 36 37 40 42 44 46 48 51 53 56 59 62 64 67 70 74 77 80 M1 270 285 295 310 325 340 355 370 390 410 430 450 480 505 530 555 580 610 640 670 705 735 765 795 830 865 900 935 M2 d1 max d2 max 285 300 315 330 350 365 385 400 425 450 470 490 525 550 575 605 635 665 695 725 770 800 830 860 910 950 990 1030 170 180 190 200 210 225 235 245 255 270 285 300 315 330 350 370 385 405 425 445 470 490 515 540 560 590 610 640 200 210 220 230 245 260 275 285 300 315 330 350 365 390 410 430 450 475 500 525 550 575 605 630 660 690 720 750 f max 127 135 142 150 157 168 176 184 190 202 214 225 236 248 262 276 288 304 318 332 352 366 386 405 420 440 460 480 d3 max 190 200 210 220 230 240 255 265 280 290 305 320 340 360 380 395 410 435 460 480 500 525 545 570 590 620 640 670 ROLL SLEEVE FLAT KEYED BORE ROLL SLEEVE SHAPED BORE f f d1 d2 PINION SLEEVE KEYED BORE d3 3

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Technical Data ORGANI DI TRASMISSIONE Series Mill Spindle Head Bore Design Roll End A Shaped Bore Standard Solid Shaft Spindle Shaft Designs 1 B Standard Tubular Welded Shaft Flat Wear Plates 2 C Long Splined Solid Shaft Flat & Round Wear Plates 3 D Long Splined Tubular Welded Solid Shaft Flat Wear Plates, End Ring Pilot & Inner Centering Bush 4 E Telescopic Solid Shaft Flat Wear Plates, End Ring Pilot & Outer Centering Bush 5 F Telescopic Tubular Welded Solid Shaft Pinion End 1 Cylindrical Bore, One Key G 2 Cylindrical Bore, Two Keys at 90° Shear-Pin Type Solid Shaft H 3 Cylindrical Bore, Two Keys at 180° Shear-Pin Type Tubular Welded Shaft 4 Cylindrical Bore, Two Keys at 120° J Flanged Type Tubular Welded Shaft 5 Cylindrical Bore for Shrink Fit & Oil Pressure Removal K Telescopic Flanged Type Tubular Welded Shaft 6 Double Diameter Cylindrical Bore for Shrink Fit & Oil Pressure Removal L Continuous Lubrication Solid Shaft 7 Splined Bore with Pilot Diameter on Both Ends 4

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Technical Data ORGANI DI TRASMISSIONE Series Mill How to Identify a Mill Spindle Head Type A B C D E F G H J L U V W X Roll Bore 1 2 3 4 5 Pinion Bore 1 2 3 4 5 6 7 A B D E Gear Material X38CrMoV51 SGNG 18NiCrMo5 CHG 31CrMo12 SGN 42CrMo4 NGN Spindle Shaft A B C D E F G H See Page : 4 J K L See Pages : 3 & 6 See Page : 4 See Page : 4 See Page : 1 How to identify an Gear Spindle Mill Spindle type : A 2 F B 1 C 4 6 0 2 3 0 0 Mill Spindle composed of : Roll End Spindle Head : Roll End Bore Design : Spindle Shaft Design : Pinion End Spindle Head : Pinion End Bore Design : Material & Heat Treatment : Spindle Size : Distance Between Shaft Ends A 2 F B 1 C 46 02300 Spindle Head Type Spindle Shaft Type Spindle Head Type A 2 F B 1 Spindle Arrangement Material & Size A 2 F B 1 C 4 6 Distance Between Shaft Ends 0 2 3 0 0 5

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Technical Data ORGANI DI TRASMISSIONE Series Mill Spindle Head Special Designs M1 M1 M2 Spindle Head - type C Spindle Head - type G Spindle Head - type D M2 M2 M1 Spindle Head - type U Spindle Head - type V Spindle Head - type W M1 M1 M1 M1 Spindle Head - type H Spindle Head - type X Spindle Head - type L Spindle Head - type J Mill Spindle Arrangements Telescopic Arrangement (stroke on sliding head) Head - type A Shaft - type C Head - type D Telescopic Arrangement (stroke on telescopic shaft) Disengageable Arrangement Head - type A Shaft - type E Head - type A Head - type W Shaft - type A Head - type X Shear-Pins Arrangement Easy Maintenance Arrangement Head - type A Shaft - type G Head - type A Head - type U Shaft - type K Head - type U 6

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Technical Data ORGANI DI TRASMISSIONE Series Mill Circulating Oil Spindle Arrangement This arrangement can solve technical and economic problems of lubrication, wear, heating and environmental pollution. Fixed Type Roll End Pinion End Realization The device can be used either with fixed and telescopic spindles. To realize it, you must have a recirculating oil system or you have to connect to the centralized lubrication system for gearboxes and pinions. The recirculating oil system must be equipped with: * Motor pump able to feed the required quantity of oil at a pressure of 1.5-2 bar * Adjusting equipment (pressure and capacity) * Devices for filtering (40-63 micron) and cooling (40-45°C) * Safety and alarm equipment. The return oil has to be collected in a pinion side fixed sump, to be then conveyed in the oil tank. The spindle feed system is very simple and has limited dimensions. It consists of a rotating distributor, receiving oil from the fixed feed system, and conveying it by means of pipes to the two rotating heads. The oil coming from the roll head is conveyed in the pinion head and then transferred in the collection sump. Telescopic Type Roll End Pinion End Advantages of forced lubrication. It reduces environmental pollution and maintenance costs, as it eliminates weekly lubrication and environment cleaning, while considerably reducing lubricant consumption. The forced lubrication and cooling system assures a long tooth lifetime and allows to reach high and concomitant angles, speed, torque, extreme working cycles which otherwise would not permit the spindle natural cooling. As a matter of fact, by continuously conveying fresh and cool oil in the meshing area, it is possible to cool the spindles and to keep, among the teeth flanks, a coat of oil having a lubricant height able to avoid any metal/metal contact. Also the knuckle performance is improved, so that, by reducing power loss, you can save energy. ORGANI DI TRASMISSIONE Head Office: MAINA Organi di Trasmissione S.p.A. - Corso Alessandria, 160 - 14100 ASTI Phone +39.0141.492811 - Fax +39.0141.272595 - Email info@maina.it www.maina.it

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