Improvements in Machinery or Apparatus for Milling Cone-screw Wheels:
Year: 1897

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Milling Cone-screw
Wheels:
We, ADOLF JOHN, and EUZEBIUSZ POLANOWSKI, both of 3 Pusta, Lodz, Russia,
Manufacturers, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
1
This invention relates to a machine which has for object to mill out the
periphery of conical discs in such a manner as to produce cone-wheels or bevel
wheels having helically arranged teeth. The machine can also be employed for
finishing (by milling) cast come-screw wheels. This machine is characterised
by the fact that the cone disc to be machined, makes a slow partial rotation
about its axis, and is during such motion cut out along the generatrix of its
cone surface, by a rotating milling cutter or tool, which moves in a straight line,
and the axis of rotation of which is situated, together with the axis of the cone
disc, in the same plane in which the two axes form an acute angle to each other.
The result of this arrangement is that the milling tool works correctly, during
the partial rotation of the cone disc, and the teeth are tapered in the requisite
manner.
A form of construction of this machine is illustrated in the accompanying
drawings. Fig. 1 is a vertical longitudinal section on the line a-b of Fig. 2,
Fig. 2 is a cross section taken at right angles thereto. Fig. 3 is an elevation
(looking from left to right in Fig. 2) of the apparatus which receives and slowly
rotates the cone disc to be machined.
The part of the machine shewn in Fig. 1 and on the left hand in Fig. 2 contains
at the top a horizontal shaft 1 which carries on its end (on the left hand end in
Fig. 1) a loose stepped driving pulley 2 which is connected, either directly or by
means of the gearing 4, with the spur wheel 3, (fixed on the shaft 1) according as
the shaft 1 is required to rotate quicker or slower. The shaft 1 extends through
the two bearing standards 5 of a support 6 which is movable on the bed 7 in the
direction of the length of the latter. Between the bearing standards 5 there is
mounted on the shaft 1, a screw wheel 8 which shares the rotation of this shaft
and also the movement of the support 6. This screw wheel engages with a second
screw wheel 9 which is mounted at right angles to the first mentioned wheel,
also in the support 6 on the shaft 10 of the milling cutter 11 Fig. 2, and causes
this cutter to rotate. A spur wheel 12 mounted on the other end (right hand' end
in Fig. 1 on the shaft l' drives by means of the gear 13, 14, 15, 16, 17, 18 a screw
spindle 19, and through the latter, moves the support 6 along its bed 7. The
Price 811

page_text: three wheels 17 of the above mentioned gear are adapted to be revolved or par-
tially revolved about the axis of the wheel 16, and are shifted in the usual manner
each time that the direction of the motion of the support 6 is to be reversed.
The bed 7 Fig. 1 of the support 6 is capable of being moved transversely to
the direction of its length along a second bed 20 by means of the scrow spindle 21.
The spur wheel 18 of the screw spindle 19otates a spur wheel 22 which is
situated under it, and whose shaft carries on its other end a bevel wheel 24,
which engages with the bevel wheel 25 on the sliaft 26. Tlic movement of this
shaft is transmitted by means of the spur wheels 27 and 28; to a shaft 29 which
in its turn rotates by means of the spur wheels 30 and 31, a screw spindle 32.
This spindle moves another support 33, along its bed. This support receives
the cone disc to be machined: Through its centro there extends a vertical shaft 34,
which receives rotation from below from the spindle 32 by means of the bevel
gearing 35, 36. At its upper end, this shaft 34 carries a spur wheel 37, and this
wheel gears in a larger spur wheel 38, which is mounted loose upon a shaft 39
that is parallel to the shaft 34. The wheel' 38 'carries on its upper face a dividing
disc 40 provided with concentric rows of holes. This dividing disc 40 is fixed to
the wheel 38.and is coupled by means of the pin 41 which is inserted in one of the
holes of the corresponding row of holes, with a crank 42 which is fixed to the
shaft 39. Below there is mounted on the shaft 39 a worm 43, which gears with
a worm wheel 44 to which the cone disc to be machined is fixed. The shaft 39
drives by means of the spur wheels 45, 46, a second shaft 47, Fig. 2, which is
parallel to it, and which moves by means of a worm 48, a smaller worm wheel 49.
This latter serves to receive cone discs of small sizes.
A
Each of the two worm gears 43, 44 and 48, 49, is adjustable vertically, and also
both are capable of rotating with the wholo wheel gear upon the base plate of the
support 33, driven by the shaft 34, about the latter, the arrangement being such,
that the upper part of the support is guided by means of the dove-tail shaped
heads of the attachment screws in a suitable annular groove in the base plate of
the support. By this means the cone disc which is to be machined, and which is
fixed on the respective worm wheel 44 or 49, and of which a broken off portion
is indicated in Fig. 2 on the left of the wheel 44, can be set at the proper
height, and at the proper angle to the milling cutter 11. In order to set the
second support at the proper distance from the milling cutter, the cone wheel 35
which is mounted on the corresponding spindle 32 and is provided with an
internal screw thread, must be uncoupled from said spindle, by the removal of
the wedge 50. Then, by rotating the spindle 32, the second support can be
pushed forwards or rearwards by rotating the spindle 32, until the support is
in the proper, position. The wedge 50 is then re-inserted. It should be noted
that the spur wheels 30 and 31 which drive the spindle 32 of the second support
must be changed to suit the desired pitch in each caso of the screw teeth to be
cut.
The adjustment or setting of the rotating milling cutter with reference to
the work is effected in the same manner as the adjustment of an ordinary lathe
cutter.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what wo
claim is:
"
1. A machine for milling cone-screw wheels, characterized by the fact that
the cone dise to be machined makes a partial rotation about its axis and at the
same time is cut out along the generatrix of its cone surface, by a rotating milling
cutter or milling tool, which moves in a straight line and whose axis of rotation
is situated together with the axis of the cone-dise in the same plane in which
both axes for an acute angle with each other, substantially as described:
2. The general arrangement and combination of parts composing our improved
machine or apparatus for milling cone wheels or bevel wheels having helically

page_text: arranged teeth all constructed and acting substantially as and for the purposes
described and illustrated with reference to the accompanying drawings.
Doted this 26th day of Two 1807
BREWER & SON,
London & Leeds, Agents for the Applicants.