Apparatus for Centring, Turning, Facing, Grinding, and Polishing Hollow Metal Articles.
Year: 1885

page_text: Apparatus for Centring, Turning, Facing,
Grinding, and Polishing Hollow Metal Articles.
We EDWARD COPE of N° 30 Grey Street Openshaw Manchester, Nut & Tube
Manufacturer, and ALFRED HOLLINGS of the same place, Works Manager, do
hereby declare the nature of the said invention for "IMPROVEMENTS IN APPARATUS
FOR CENTRING, TURNING, FACING GRINDING AND POLISHING HOLLOW METAL
ARTICLES บ to be as follows:-
The object is to provide improved apparatus by which nuts short lengths of
tube, small pulleys, wheels and like hollow articles can be accurately centred and
rapidly and efficiently turned faced ground and polished; the parts of the apparatus
for centring and polishing being separately useful.
Apparatus under our invention for performing the whole of the operations
above mentioned is constructed substantially as follows:-A driving shaft carried
in suitable bearings has secured to it a frame provided with the desired number of
chucks preferably six. The said chucks are carried in suitable bearings in the said
frame with their axes at equal distances apart and at equal distances from the
centre of the carrying shaft. Each chuck is fitted with one or more friction
pulleys and is free to be rotated on an axis parallel to that of the carrying shaft.
Around the chuck frame driving discs carried in shafts free to revolve in bearings
are arranged so as to gear with the friction pulleys on the chucks and give motion
thereto. The driving discs on each shaft consist preferably of two plates free to
move end wise on the said shaft; the said plates are advantageously faced at their
outer edges with india rubber or equivalent material and are pressed towards each
other by springs so as to grip firmly the friction pulleys on the chucks at the
required times. Opposite to the driving disc shafts in front or at the sides of the
chucks are cutting facing chamfering grinding and polishing tools one or more
vacant places being left to allow for chucking and removing the hollow articles.
Motion is given to the various parts by suitable driving gear, belting being
preferred.
The action of the apparatus is as follows:-Nuts or hollow articles are secured
in rotation on the chucks, and the chuck frame is caused to rotate intermittently
so that each chuck pulley is brought successively into gear with each set of
driving discs and caused to rotate. Whilst the chucks are rotating the tools are

page_text: in action and the nuts or hollow articles are successively turned faced ground and
polished.
In order to obtain accurate centring of the nuts or hollow articles chucks are
made with a central conical ended sliding spindle within a sleeve and end motion
is given to the said spindle by means of a cotter receiving motion through screw
and hand wheel appliances on the sleeve. The face of the chuck is fitted with an
expansible nose held in position by dogs kept to their work by springs. The said
expansible nose is in one or more pieces and is made with a taper hole to receive
the conical ended spindle.
When in use the nut or hollow article is placed around the nose which latter is
then expanded by means of the conical ended spindle so as to grip the internal
surface of the nut or hollow article.
When grinding or polishing nuts or hollow articles the grinding or polishing tool
is made circular and is caused to rotate whilst acting on the nuts or hollow articles
carried by the rotating chucks.
יך.

page_text: Grinding, and Polishing Hollow Metal Articles.
We EDWARD COPE of N° 30 Grey Street Openshaw Manchester in the County
of Lancaster Nut and Tube Manufacturer, and ALFRED HOLLINGS of the same
place Works Manager 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:-
The object is to provide improved apparatus by which nuts short lengths of
tube, small pulleys, wheels and like hollow articles can be accurately centred and
rapidly and efficiently turned faced ground and polished; the parts of the apparatus
for centring and polishing being separately useful.
::
Apparatus under our invention for performing the whole of the operations
above mentioned is constructed substantially as follows: reference being had to
the accompanying drawings, where Fig. 1 is a side elevation, fig. 2 a front view,
and fig. 3 a back view of the whole machine, and fig. 4 a longitudinal section and
fig. 5a face view of the chuck or centring device. In all the views like letters
denote the same parts.
1 is a central shaft carried in bearings 2 on the frame 3. 4 frame secured to the
shaft 1. The said frame 4 has attached to it six bearings 5 in which revolve six
chuck spindles 6. The said chuck spindles have their axes of rotation parallel to.
the longitudinal axis of shaft 1. and are at equal distances from it and from each
other. On the spindle of each chuck is a friction pulley 7. 8. 8¹ are driving discs
carried by spindles 9 in bearings on the frame 3. The said driving discs are two
in number on each spindle the part being secured to the spindle whilst the
part 8 is free to slide endways on the said spindle and is held in position by the
spring 10. The faces of the discs 8. 8¹ are inclined, and are faced with rubber
leather or other suitable material. The friction pulleys 7 are V shaped at their
edges so as to fit the driving surfaces of the said discs. 11 driving pulleys on the
spindles 9. 12 driving belt. 13 main driving shaft and pulleys. 14 main driving
belt. 15 clutch and lever. The spindle 9x is provided with a friction pulley 11*
instead of with a driving pulley. A belt 16 attached to the frame 3 at 17 passes
partly round the pulley 9x and is provided at its free end with a weight 18. On
the central shaft 1 is a disc 19 fitted with pins 20 and having notches or recesses 21
on its periphery. 22 is a spring bolt which fits into the notches or recesses 21 to
retain the disc 19 in position. 23 is a cam on a shaft 24 for disengaging the
locking bolt at the required times. 25 is a spring catch carried by a reciprocating
bar 26 and receiving to and fro motion from the cam 27 on the shaft 24. The
catch 25. in its to and fro motion acts successively on the pins 20 so as to cause
the disc 19 and with it the shaft and chucks to make one sixth of a revolution.
28. 29. 30 31 are slide rests for carrying cutting chamfering or like tools and are
secured to the frame 3 in front of the chuck spindles 6. 32 are excentric connections
driven by the shaft 33 for giving transverse motion to the slide rests, and 84 is
excentric gear driven by the shafts 35 for giving to and fro motion to the slide

page_text: rests. 36 driving shafts and connections for conveying motion from the main
driving shaft 13, to the cam and excentric shafts 24. 33. and 35. 37 clutch and
lever for starting and stopping the said gear. 38 emery or grinding wheel carried
on a slide rest 39 actuated by excentric gear 40. 41 driving belt for emery or
grinding wheel.
The chucks are made with a conical ended central spindle a within the chuck
spindle 6. In the chuck spindle 6 is a slot b through which a key c attached to
the spindle a passes. On the chuck spindle 6 is a thread d on which is a nut and
wheel e.
The said nut and wheel are connected to the sleeve ƒ secured to the
key c.
chuck face secured to the spindle 6. Within slots in the said face is an
expansible nose in two pieces, and dogs i to hold the nose in position. The
dogs are kept to their work by springs or as is found preferable by the conical
cup which screws on the face plate g. A set screw holds the cup j in position.
k is a plate with an aperture the size of the nut or piece to be treated and it is free
to slide to and fro on set bolts l.
•
The action of the apparatus is as follows:
The driving gear chucks and tool rests are in motion with the exception of the
chuck in gear with the discs on the spindle 9*. This latter is stationary and a nut
is screwed on the loose nose, the plate his moved forward to grip the nut, the nut
and wheel care turned until the central conical spindle a is forced forward, and the
nose expanded to hold the nut, tightly, the plate & is then slid back against the face
of the chuck. By the time the above operation is completed the cams 23 and 27
have actuated the bolts 22, and catch bar 26. so as to give one sixth of a revolution
to the chuck carrier. A chuck with a finished nut is thus brought into gear with
the discs on 9*, its motion is arrested, the finished nut is removed and a new one
placed on the nose as before described. As the chuck carrier rotates the nuts on
the chucks are successively brought under the action of the tools 28. 29. 30. 31. and
grinding or polishing wheel 38. The driving pulleys 11 are caused to travel at
different speeds according to the action of the tool on the nut or hollow article.
In the drawing 28 is a rough facing tool, 29 a rough chamfering tool, 30, a
finishing tool for the face, and 31 a finishing tool for the chamfer. The wheel 38
is used for polishing or grinding the face of the nut or hollow article. It will be
evident that the number and position of the tools may be altered and that several
grinding and polishing tools may be used or that all the work may be done by
cutting tools. It will further be obvious that many parts of detail in gear and
connections may be altered.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that' what
we claim is :-
First. Apparatus for: centring,' turning, facing grinding and polishing hollow
metal articles substantially as herein setforth.
Second. Chucks for hollow articles constructed substantially as herein setforth.
Third. In apparatus for the purposes herein setforth the combination of driving
shafts chucks and tools disposed concentrically, and at equal distances apart sub-
stantially as set forth.