Gear cutting – milling – or planing – Gear cutting – With work or product advancing
Patent
1986-10-28
1988-05-10
Bilinsky, Z. R.
Gear cutting, milling, or planing
Gear cutting
With work or product advancing
51215AR, 409 49, 414744A, B23F 2304
Patent
active
047431474
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an automatic loader for machine tools and particularly for gear-shaving machines.
SUMMARY OF THE INVENTION
The object of the invention is to provide a loader which is more efficient than the known loaders of the prior art and, in the particular case of application to gear-shaving machines, enables the step of meshing the gear to be shaved with the shaving cutter to be effected safely and without risk of damage to the teeth of the gear and the shaving cutter.
This object is achieved by the characteristic which constitutes the subjet of Claim 1 below.
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and advantages of the present invention will become apparent from the description which follows with reference to the appended drawings, provided purely by way of non-limiting example, in which:
FIG. 1 is an elevational view of an automatic loader for gear-shaving machines, according to the present invention,
FIG. 2 is a plan view of FIG. 1,
FIG. 3 illustrates a detail of FIG. 2 on an enlarged scale,
FIG. 4 is a perspective view of a detail of the conveyors illustrated in FIGS. 1 and 2,
FIG. 5 is a perspective view of a variant of FIG. 4 and
FIG. 6 is schematic view illustrating the step of meshing a gear to be shaved with the shaving cutter.
DETAILED DESCRIPTION OF THE INVENTION
In the example illustrated in FIGS. 1 to 4, a gear-shaving machine is indicated at 1 and has a shaving cutter 2 in the form of a toothed wheel rotated about a horizontal axis 3.
The machine 1 further includes means, generally indicated 4, for supporting a gear 22 to be shaved. The gear 22 is rotated about a horizontal axis 5 inclined to and below the axis 3, the gear 22 meshing with the teeth of the shaving cutter 2 and being pressed against the cutter as a result of an upwardly-exerted force.
A loading unit, generally indicated at 6, is adjacent the shaving machine 1 and includes a base 7 having horizontal guides 8 on which a slide 9 is slidable in a direction perpendicular to the axis 5.
The movement of the slide 9 in both directions is driven by a motor 10 which operates a screw 11 engaged with a nut, not shown, carried by the slide 9.
A circular platform 12 is rotatably mounted on the slide 9 about a vertical axis. The platform 12 is rotated by a motor 13 which drives a sprocket 14 meshing with external teeth 15 of the platform 12.
Vertical guide columns, indicated 16, are carried by the rotatable platform 12 and are connected at their upper ends by a circular plate 16a.
A support beam 17 is slidable vertically on the columns 16 and its vertical movement in both directions is driven by a motor 18 through a screw 18a which engages a nut 18b carried by the beam 17.
Each of the two ends of the support beam 17 is articulated about a horizontal pin 19 to a rocker arm 20 provided at its upper or first end with a cradle-shaped seat 21 for supporting a gear 22.
The inner or second end of each rocker arm 20 is articulated about a horizontal pin 23, as illustrated in particular in FIG. 3, to the lower end of the rod 24 of a piston 25 sealed for sliding in a cylinder 27 by means of a washer 26.
The cylinder 27 is closed at its upper end by an end wall 28 and at its lower end is articulated about a pin 29 to a forked support 30 carried by the beam 17.
The chamber 31 of the cylinder 27 between the piston 26 and the wall 28 is filled with a pressurised gas, for example air, supplied through a feed duct 32 and a pressure regulator 33 having a knob 34 for adjustment of the pressure.
A manometer for indicating the pressure in the chamber 31 is indicated 35.
The pressure in the chamber 31 is regulated by means of the regulator 33 in dependence on the weight of the gear 22 supported in the seat 21 of the rocker arm 20.
An adjustable vent valve 43 is fitted to the wall 28 of the cylinder 27. This valve could also be incorporated in the pressure regulator 33.
A microswitch 36 is carried by the forked support 30 so as to be operable as a result of a predetermined degree of oscillat
REFERENCES:
patent: 2692535 (1948-04-01), Praeg
patent: 2733641 (1951-06-01), Praeg
patent: 2782687 (1957-02-01), Carlsen et al.
Scott, Metal working Production, 4/27/60, pp. 753-756.
Bilinsky Z. R.
Metalcastello srl
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