Home  >  Metal Processing Machinery  >  Machine Tool Equipment  >  Gear Cutting Machines

YA 31125ET trustworthy business partner gear hobber machine, 1. making helical gear, worm and sprocket, 2.after-sales service - details see: https://www.machineto.com/y31125et-trustworthy-business-partner-gear-hobber-machine-10126173

Y 31125ET trustworthy business partner gear hobber machine

Introduction

A hobbing machine is a special form of milling machine that cuts gears. It is the major industrial process for cutting (as opposed to grinding) spur gears of involute form.

The machine forms the gear via a generating process by rotating the gear blank and the cutter (called ahob) at the same time with a fixed gearing ratio between hob and blank. The hob has a profile given in cross-section by the fundamental rack for the gear tooth profile and is in the form of a helix so that the sides of the teeth on thehobgenerate the curve on the gear. The helix has a number of cuts parallel to the axis to form the cutting teeth and the profile is suitably relieved to provide cutting clearance.

For a tooth profile which is a theoretical involute, the fundamental rack is straight-sided, with sides inclined at the pressure angle of the tooth form, with flat top and bottom. The necessary addendum correction to allow the use of small-numbered pinions can either be obtained by suitable modification of this rack to a cycloidal form at the tips, or by hobbing at other than the theoretical pitch circle diameter. Since the gear ratio between hob and blank is fixed, the resulting gear will have the correct pitch on the pitch circle, but the tooth thickness will not be equal to the space width.

Hobbing is invariably used to produce throated worm wheels, but it is not possible to cut all useful tooth profiles in this way; if any portion of thehobprofile is perpendicular to the axis then it will have no cutting clearance generated by the usual backing off process, and it will not cut well. The NHS Swiss tooth standards give rise to such problems. Such small gears normally must be milled instead.

Function

Gear-hobbing machinesuse a rotating, multiple-tooth cutting tool called a hob for generating teeth on spur gears, worm gears, helical gears, splines, and sprockets. More gears are cut by hobbing than by other methods because the hobbing cutter cuts continuously and produces accurate gears at high production rates.

Hobbing is a machining process for making gears, splines, and sprockets on ahobbing machine, which is a special type of milling machine. The teeth or splines are progressively cut into the workpiece by a series of cuts made by a cutting toolcalled ahob. Compared to other gear forming processes it is relatively inexpensive but still quite accurate, thus it is used for a broad range of parts and quantities.

It is the most widely used gear cutting process for creating spur and helical gears and more gears are cut by hobbing than any other process since it is relatively quick and inexpensive.

Features

1.By continuous indexing, it is suitable to cutcylindrical spur, helical geras and sprocketsunder axis feeding.
2. It can also cutworm wheelsby a worm-wheel hub under radial feeding.
3. Machine feeding by manual.
4.It is suitable for mine, oil, ship, engineering mechanism industries for making large gears.
5.Tangential hob head is also available for special order to cut worm wheels under tangential feeding mode.

Technical parameters

Model	Y31125ET	Y3180H
Max workpiece diameter(with rear column/without rear column)	1000MM	550MM
	2200MM	800MM
Max hobbing modulus	16MM	10MM
Max Processing Width	500MM	300MM
Min processing gear	Z/K=12	Z/K=8
Max vertical travel of tool post	800MM	350MM
max swiver angel of tool post	±60°	±240°
Distance between cutter axis and worktable	Max1000MM	Max585MM
	Min200MM	Min235MM
Spindle taper	Morse 6	Morse 5
Hob diameter	Max Dia 245MM	Max Dia 180MM
	Min length 220MM	Min length 180MM
Max axial movement of cutter	100MM	50MM
Hob abor diameters	Φ27,Φ32,Φ40,Φ50MM	Φ22,Φ27,Φ32,Φ40MM
Distance between hob axis center and worktable	Max 1250MM	Max 550MM
	Min 100MM	Min 50MM
Worktable aperture	200MM	80MM
Taper bore of workpiece mandrel	Morse 6	Morse 5
Worktable diameter	950MM	650MM
Spindle rotate speed and range	7level 16-125R/Min	8Level 40-200R/Min
Rapid travel speed of tool post slide	520MM/Min	≤540MM/Min
Worktable rapid moving speed	470MM/Min	≤540MM/Min
Distance between worktable and outer support of axis face	Min700MM	Min400MM
	Max1200MM	Max600MM
Axial feed rate and degree	8Level 0.39-4.39MM/R	12Level 0.4-4MM/R
main motor power and synchro-speed	11Kw 1500R/Min	N=5.5Kw 1500R/Min
Axial rapid motor power and synchro-speed	3Kw 1500R/Min	N=1.1Kw 1500R/Min
Worktable rapid motor power and synchro-speed	1.5Kw 1000R/Min	N=0.55Kw 1500R/Min
Hydraulic oil pump power and synchro-speed	1.5Kw 1000R/Min	N=1.1Kw 910R/Min
Cooling pump power and synchro-speed	1.5Kw 1500R/Min
Machine weight	15000Kg	5500kg
Overall dimension	3995*2040*2700MM	2752*1490*1870MM