Page 28 - May

METALWORKING EQUIPMENT AND TOOLS

● horizontal gear hobbing machines of sizes D125… Ø320 mm.
3. Vertical gear hobbing machines of sizes D2000… D12500 mm can be designed with direct
drives of work pieces on the basis of special compound segment-shaped motors. Horizontal
gear hobbing machines of sizes D500… D1250 mm can be designed with direct drives of work
pieces on existing motors. For the drives of the cutter specified in clause 3 of the machines, the
currently produced motors do not provide the required torque, and it is necessary to install an
additional reduction gear.
Table 3. Parameters for the selection of drives for horizontal gear hobbing machines

No. parameter Machine size (Max. work piece diameter D)
125 200 320 500 800 1250
1 Maximum module m, 2,5 6 10 20 32 40
mm
2 Maximum worm 71 112 200 300 380 420
diameter cutters Dfr,
mm
3 Angle of inclination of 45 45 35 30 30 30
teeth β, degrees
4 Cutting speed V, m / 25 25 22 20 20 20
min
5 Processing modes: 4 4 3,5 3,5 3 3
depth t = 2.1m, feed
Soc1, mm / rev.zag
6 Circumferential cutting 3000 7200 9500 18000 26000 32000
force Fz1, N
7 Mill torque Mfr1, Nm 110 400 950 2700 4900 6700

8 Moment on the work 140 550 1000 2600 2600 12000
piece Mzag, Nm
9 Maximum frequency 700 500 300 200 200 150
cutter rotation n, rpm

V.V. Bushuev, post-graduate student
of the "Machine tools" department
of the Moscow State Technical University "Stankin".
A.G. Ostretsov, Design Engineer, MSTU "Stankin" State Research Center
.
References:
1. Adam Ya.I., Ovumyan G.G. Gear hobbing handbook. Moscow: Mashinostroenie, 1975.232 p. 2. Bushuev V.V. Trends in the development of the world machine
tool industry / Steen, No. 9, 2000.
3. Bushuev V.V., Dorozhko A.O., Ryvkin B.M. A method for designing new generation machine tools based on unified mechatronic modules. Bulletin of MSTU
"Stankin", No. 1 (18), 2012, pp. 15 - 22.
4. Bushuev V.V., Molodtsov V.V. The role of the kinematic structure of the machine in ensuring the required accuracy of processing the product. STIN / No. 6, 7,
2010.
5. Bushuev V.V., Naletov S.P. Heavy gear cutting machines. Moscow: Mashinostroenie, 1986.280 p.
6. Production of gear wheels. Ed. B.A. Tayts. 6th ed. revised and add. Moscow: Mechanical Engineering, 1975.
7. Filatov V.P. Rigidity of gear hobbing machines. Moscow: Mechanical engineering, 1969.

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