PORTABLE TOOL JIG SUPPORT

ASSISE POUR GABARIT D'OUTILLAGE PORTABLE

English Abstract

ABSTRACT OF THE DISCLOSURE
A portable tool jig support according to the present
invention is adapted to fit to a table of a tool working
apparatus. The tool jig support comprises a housing
fitted with an elongated rotatable member extending
substantially horizontally through the housing. The
elongated rotatable member is provided at one end with
tool jig receiving means for detatchably receiving a tool
jig and with handle means at the other end for rotating
the rotatable member and enabling adjustment of the tool
jig when it is fitted to the support.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:


1. A portable tool jig support for supporting either one
of two different tool jigs selected from the group consisting
of the tool chuck and an adjustable tool clamp and guide, said
tool jig support comprising a housing having a base portion
adapted for fitting to a table of a tool working apparatus, a
rotatable spindle extending substantially horizontally through
and being slideable within said housing, said spindle being
provided with a tapered hollow region for receiving the tool
chuck and an annular collar around said tapered hollow region
for receiving the adjustable tool clamp and guide and handle
means remote from said tapered region and an annual collar for
rotating said spindle, said tool jig support being adapted to
receive a rotation control plate and locking means for
respectively adjustably controlling rotation of said spindle
and locking said spindle against horizontal sliding for
accurate positioning of said spindle with the adjustable tool
clamp and guide fitted thereto, said rotation control plate
being readily removeable from said spindle and said locking
means being manually releasable at said housing for both free
rotational and horizontal sliding adjustment of the tool chuck
when fitted to said spindle.

2. A portable tool jig support as claimed in Claim 1
wherein said rotation control plate is removeably secured to
said support by a releasable lock pin.

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3. A portable tool jig support as claimed in Claim 1
wherein said spindle is provided with a continuous annular
groove and said housing is provided with an opening to said
groove for receiving a pin adapted to fit through said opening
into said annular groove to prevent horizontal sliding of said
spindle without affecting rotation thereof, said pin being
frictionally engaged in said opening to enable manual removal
of the pin therefrom, which, with said rotation control plate
removed, enables horizontal sliding adjustment of said spindle.



4. A portable tool holder as claimed in Claim 1 wherein
said plate is provided with a continuous round groove and two
adjustable pins in said groove, said support having a stop
member moveable to and away from a stop position for engaging
said pins in said groove for limiting rotation of said plate
and said spindle.

12

Description

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FIELD OF THE INVENTION
______ _
The present invention relates to a portable tool
jig support for fitting to a table of a tool working
apparatus. The jig support is capable of accepting
different tool jigs and has particular application for
use in tool cuttiny and end mill grinding operations.

BACKGROUND_OF THE_INVENTION
According to standard tool grinding and cutting
operations, separate machines are required for each
individual job. These machines are not only large,
making them awkward to locate in a small machine shop,
but they are also very expensive particularly since a
number of these machines are required to have a
relatively complete machine shop. In fact, the cost of
such machines may be prohibitive for the small operation
such as that run by a single machinist on his own.

SUMMARY OF_THE INVENTION
The present invention provides a portable tool jig
support adapted to fit to a table of a tool working
apparatus. The tool jig support comprises a housing
fitted with an elongated rotatable member extending
substantially horizontally through the housing. The
rotatable member is provided at one end with tool jig
receiving means for detatchably receiving a tool jig and
handle means away from the tool jig receiving means for
rotating the elongated rotatable membe{ and enabling
adjustment of the tool jig when it is fitted on the
rotatable member.
The portable jig support of the present invention

may be set up to accommodate different types of t:ool jigs
'~



1 and therefore eliminates the need for the standard and
quite substantial supporting and guiding elements on
presently available separate and distinct varieties of
tool working apparatus. In fact with the portable jig
support of the present invention, only a grinding wheel
or the like need be provided in conjunction with the
table on the apparatus for supporting the jig support~
The tool ~ig support of the present invention is then
used to support the tool jig attached to the rotatable
member in various different positions with respect to the
grinding wheel through the rotational adjustment of the
rotatable member.
According to an aspect of the present invention the
elongated rotatable member is adapted to receive, one at
a time, both a tool chock which has particular
application for tool grinding operations and a tool guide
and clamp which is particularly useful for the cutting of
various shaped tools. In order to provide a thorough
grinding of the tool the elongated rotatable member is
~0 hori~ontally as well as rotationally adjustable. On the
other hand for proper tool cutting operations the
elongated rotatable member is fixed against horizontal
movement while the tool guide and clamp is adjustable at
90 degrees to the axis of rotation of the elongated
rotatable member to enable multi adjustments of a tool
fitted into the guide and clamp.
BRIEF DISCUSSION OF_THE_DRAWINGS
The above as well as other advantages and features
of the present invention will be described according to
the detailed description oE the preferred embodiments of

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1 the present invention wherein:
Figure 1 is a perspective view looking down on a
portable support with a tool jig fitted to the support
according to a preferred embodiment of the invention with
the support fitted to the table of a tool working
apparatus;
Figure 2 is a partially exploded perspective view
looking down on the portable tool support and jig shown
in Figure l;
Figure 3 is a front plan view of the tool jig on the
portable support of Figure 2;
Figure 4 is a perspective view looking down from the
rear of the portable support and tool jig of Figure 2
Figure 5 is an exploded perspective view of the
portable support and tool jig of Figure l;
Figure 6 is a cross sectional view taken along the
lines 6-6 of Figure 2;
Figure 7 is a longitudinal sectional view taken
along the line 7-7 of Figure 4;
Figure 8 is an exploded perspective view of a
portable tool jig support which according to a further
preferred embodiment of the present invention is adapted
to receive an alternate tool jig support from that shown
in the earlier figures; and,
Figure 9 is a longitudinal sectional view of the
arrangement shown in Figure 8 when assembled and in
position beneath a grinding wheel of a tool working
apparatus.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMEMTS OF THE
PRESENT INVE~TION
____________..____________________________ ____. .._ _______




1 Figure 1 shows the portable tool jig according to
one aspect of the invention wherein an adjustable tool
clamp and guide generally indicated at 37 is fitted to
the jig support which is in turn supported on a working
table of a grinding wheel machine. However Figure 9
shows in cross section, a further aspect of the invention
wherein the portable jig support is used to support a
tool chuck for use in the grinding of an end mill at the
grinding wheel.
Both of the above aspects of the present invention
are based on a tool jig support which can be set up for
either one of the two above modes of operation. This jig
support to which various adaptations are made according
to the mode of operation desired is well shown in Figure
8.
The support itself comprises a metallic housing 1
having a flat base 3 which fits flushly to the table of
the grinder. In accordance with standard construction
the table of the grinder is electro-magnetic for
magnetization of the housing to the table to effectively
secure the support in position.
A hollow rotatable spindle 5 extends horizontally
through the housing as shown in Figure 7. The spindle
includes a reduced diameter portion 10 extending out the
back of the housing and is provided at its forward end
with an annular collar 9 adapted to abut a forward plate
15 of the housingO A tapered region 11 is provided
interiorly of the spindle immediately rearwardly of
annular collar 9.
The spindle is provided with a continuous annular

groove 8 while the support is provided with a small




1 opening 19 with which groove 8 may be aligned. For the
mode of operation shown in Figure 1 a pin 21 is fitted
through opening 19 into groove 8 to eliminate any
longitudinal shifting of tha spindle without affecting
its rotation.
The portable support is set up as shown in Figures 1
through 7 for use in supporting the adjustable tool guide
and clamp of Figure 1. According to this set up pin 21
is fitted in position to lock spindle 5 against
horizontal shifting. A rear end plate 17 is then Eitted
on the reduced diameter portion 10 of the spind:Le. This
plate is keyed against rotation on the spindle. A
rearward handle 7 is also keyed on the reduced diameter
portion of the spindle.
The tool guide clamp is secured to the forward
; collar ~ of the spindle by means of bolts 31 which thread
into apertures 13 of the spindle collar. The bolts
extend completely through the collar where they thread
into plate 15 so that the Eorward plate as well as the
tool guide and clamp rotate with the spindle by means of
handle 7.
The housing is provided with a collar portion 23
immediately behind plate 15. This collar portion is
provided with a plurality of apertures 25 as well shown
in Figure 6. Plate~15 is on the other hand provided with
apertures 16 regularly spaced around the plate.
Apertures 16 and 23 cooperate with one another to provide
a Vernier scale on the ætructure. According to this
Vernier scale the apertures 16 and 23 may be aligned with
one another at various angular positions around the

6a~B

1 forward plate and locked in position by means of a pin 26
so that the tool guide and clamp 37 can be held at
essentially any angle with respect to the wheel of the
tool grinder. Plate 15 is further provided wi~h a
visually readable scale 27 to indicate the angular
position of the tool guide clamp.
The tool guide and clamp 37 fits directly to the
spindle collar and is provided with a groove 39 extending
completely along the body portion and opening at a flat
surface 38 which is capped by a plate 47. A V-block 41
having side slots 43 is adjustably positioned within
guide slot 39. A threaded adjuster 49 is threaded
through both plate 47 and the rear portion 45 of the
V-block which is located within guide slot 39. Plate ~7
is fixed in position so that by rotating adjustment
member 49 the V-block moves either up or down in the
guide slot as sbown in Figure 3.
As shown in Figure 2 the V-block is adapted to
receive a clamping member 51 having inwardly projecting
lugs 53 adapted to seat within a pair of longitudinal
slots 46 running along the length of the V-block. Clamp
51 includes a clamp adjustment member 55 which is
threaded into t,he clamp.
Figure 1 shows a piece of uncut material 61 clamped
to the V-block and ready to be processed by the grinding
wheel to form a tool such as a specially shaped punch or
the like. This piece of material can be raised and
lowered with the V-block through adjustment to threaded
member 49. It can also be fixed in a particular angular
position with respect to the grinding wheel by means of

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1 tbe Vernier scale. When the Vernier scale is left to
freely rotate the entire arrangement ls rotated by means
of handle 7. However, in forming some of the almost
limitless shapes of tool that can be formed using the
tool holder, it is often necessary to have limited
rotation of the V-block. Accordingly! rear plate 17 is
provided with a continuous groove 18 in which pins 33 are
located. These pins may be locked at any desired
position within groove 18 or they may be left to slide
freely within the groove. The support housing is on the
other hand provided with an adjustable stop member 35
which is slidable to and away from a position of
engagement with respect to pins 33 as shown in Figure ~.
The rotation of plate 17 as well as the tool jig at the
~ front end of the device can therefore be limited by
; locking the pins at a set distance from one another and
by moving stop member 35 to the stop position whereby the
plate can only rotate through the distance between the
pins 33.
This latter feature of lin,iting the rotatlon of the
V-block is particularly desirable when working with a
diamond needle as indicated at 67 in Figure 5 for the-
inside and outside radius forming on the grinding wheel
itself for the dressing of various shaped grinding wheels.
Through the use of plate 17 and pins 33 as well as
the Vernier scale standard square tools are easily made
by setting the pin in the Vernier scale at four 90 degree
positions offset from one another to provide the square
configuration. In order to form a triangular tool such
as a punch or the like the Vernier scale i9 used at three

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1 120 degree positions. In order to make a rounded punch
the Vernier scale is not used and plate 17 is allowed to
freely rotate. For purposes of making more complicated
shapes xuch as eliptical and star heads on the tool, the
pin is removed from the Vernier scale and pins 33 of
plate 17 are locked at different positions around the
plate as dictated by the desired shape of the tool to be
formed.
A second mode in which the jig support of the
present invention can be ~sed is shown in Figures 8 and 9
oE the drawinys. According to this mode rear plate 17 as
well as handle 7 are removed from the rearward extension
10 of spindle 5. In addition pin 21 is removed from the
side of the housing to allow longitudinal sliding of the
spindle. Furthermore, the guide and clamp body portion
37 as well as bolts 31 are removed from the front end of
the support allowing the spindle to rotate relative to
the housing.
After the rear plate and handle have been removed a
draw bar 79 is fitted within the rearward extension 10 of
spindle 5. Tool chuck 71 having a threaded rear end 77
is then fitted into the front end of the support until
the threads 81 of the draw bar mate with the threads of
the tool chuck. An end mill 76 is then fitted within the
mouth 75 of head 73 of the tool chuck and the dLaw bar
and tool chuck are threaded to one another until the head
of the tool chuck is drawn into the tapered region 11 of
spindle 5. The threading action is continued until thè
end mill is tightly clamped within the tool chuck.



1 The base of the housing is provided with a threaded
opening 27 for aiigning with a threaded opening 95 of
securing portion 93 of an end mill guide 85 as shown in
Figure 8. The end mill guide is bolted to the base of
the housing and is used to guide the positioning of the
end mill for the grinding of the end mill spiral blades.
Guide 85 which is ad~ustable to accommodate
different diameters of end mills includes an upper body
portion 87 having an elongated slot B9 for adjustment of
the upper body portion and a guide tip 91 which as shown
in Figure 9 rides directly along the spiral blades while
they are being ground from above by the wheel.
In order to carry out the grinding operation the
spindle and tool chuck are rotated by means of handle 83
on draw bar 79. At the same time the spindle, tool chuck
and end mill are moved horizontally with respect to the
housing to enable grinding of the full length of the
blades as they are being rotated. This horizontal
positioning of the end mill is allowed by virtue of the
fact that the spindle can be pushed forwardly until
handle 83 of draw bar 79 abuts the back of the housing
and can be pulled rearwardly to the Figure 9 positlon
where plate 15 abuts housing portion 23 with pin 21
pulled out of the side of the bousing and away from
groove 8 in the spindle.
It is to be understood that further tool forming
operations to those described above can easily be
accomplished through the use of either one of the tool
~igs described when supported from the portable ~ig
support of the present invention on the table of a



1 standard tool working apparatus such as a grinding wheel
or any similar device. Furthermore, although various
preferred embodiments oE the invention have bee
described herein in detail it will be appreciated by
those skilled in the art that variations may be made
thereto without departing from the spirit of the
invention or the scope of the appendecl claims.