DeVlieg MicroPoint Tool Grinder

Inc.
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SIMPLE TO SET UP
EASY TO OPERATE
direct dial settings to precise
tool geometry requirements
CONSTANT RELIEF
ANGLE AD.IUSTMI;NT--
VARIABLE REliEF
ANGLE ADJUSTMENT
icropoint
TOOL POINT
RADIUS
TABLE
STROKE
the first grinder capable of
ABSOLUTE CONTROL
OF TOOL GEOMETRY
THE MICROPOINT TOOL GRINDER is the
first in its field ahle to grind single point
tool profiles geometrically correct to pre­
cise gage accuracy and with either cone or
cylindrical relief at the radius.
DIRECT DIAL SETTINGS provide a method
of fast, simple, accurate adjustment for each
LEAD CUTTING
AND
END CUTTING
ANGLE
radius, tIngle, offset
and
accordance with the
clearance
in exact
geometric require­
ments of the tool in a full range of sizes and
shapes, some of which are illustrated on
pages 6 and 7.
T H E WHEEL SPIN D L E HEAD h a s an
adjustable reciprocating movement and the
generating cycle is hand operated with a
cushion at the end of the stroke resulting in
four to six times the usual wheel life and a
high finish on the tool.
THE MACHINE is of rugged construction
throughout with hardened and ground
cylindrical guide ways well protected from
sludge to insure long life, and is capable
of fast metal removal.
SIMPLE ACCURATE octagonal tool hold­
ers fit a Vee nest and clamping means on
the machine which quickly sets the tool in
the correct position for grinding. Compara­
tor inspection can be made without remov­
ing the tool from this holder.
THE
OCTAGONAL
TYPE
tool
holder
facilitates indexing the tool 90° for face
grinding.
GAGE QUALITY tool holders and acces·
sories are available for grinding all sizes
of Microbore units, square tool bits from
lIt"
to 1 " round tool bits from
,
Vs"
and special holders for other shapes.
to
%"
CopyrigM 1958, DeVlieg Machine Company
THE MICROPOINT SYSTEM
of single point tool
geometry is based on making all dimensions of the
cutting edge relative to the center of the tip radius.
THE ACCURATE BLENDING
of the radius into the
Rats of the lead and end cutting edges provides a tool
profile that governs and greatly enhances the size
and finish of the machining operation.
THE SIZE OF THE RADIUS
is very critical to the
material to b e machined, the performance of the
machine tool in which it is being used and the life of
the cutting edge.
the ac curately ground
tool point radius and
if� dil-eat relation fo
BORE SIZE
AND FINE SURFACE
FINISH
The illustration at rhe right shows a
typical profile of a boring tool magnified
many times. The diagram shows a
depth of cut of .010" with a feed of .003"
per revolution. This clearly shows that
the point of tangency between
the radius and the end cutting edge
"­
is the part of the cutting tool
that determines bore size and finish.
"­
"­
,
The ease of profile control in relation
to tool holding means plus the accuracy
,
"
\
of reproduction make it possible to
\
\
develop tool shapes for highest
performance. This will increase the
efficiency of machine tools to a degree
not possible with grinding methods
that depend on operator skill or
tool sharpening means of less accuracy.
The Micropoint System is especially
well suited to the grinding of tools
which must be pre-set away from the
machine tool and where close tool point
tolerances must be maintained.
SEGMENT
OFRADIUS
THE
TOOL
POINT
ACTUALLY CUTTING METAL
TOOL POINT WITH RADIUS
TOOL ONE
POINTREVOLUTION
ADVANCED -------r--l
.020
.003,
\
I
I
I
I
--�-------ll
I
I
Figure 3
Figure 4
Figure 3 is a cross section, 90 times larger
than actual size, showing a bore surface
being generated by a tool point advancing
at a rate of .003 inches per revolution.
Figure 4 illustrates a section of the surface
being machined as it would appear when
magnified 400 times.
SO j
�
--
HEIGHT
OF CRESTQUALITYICH
DETERMINES
OF BORE FINISH
�-­
Oitecf teading dia/� fot fA9T G�/NOE� 9ET(JP
...
I.
2.
TOOL POINT RADIUS ADJUSTMENT
Basic geometry illustrates difference between
gpecial
TOOL POINT OFFSET ADJUSTMENT
COM
and cylindrically ground forms-
The tip radius of a .cutting tool is
Figure 5
known
to
be most critical
for
finish and tool life.
The cone type relief shown in Figure
5 has uniform clearance around the
entire profile of the cutting edge,
......
therefore is capable of maximum
tool life.
The cylindrical type relief shown in
Figure
7
has
the
some
radius
regardless of the face height of the
tool. However, the clearance varies
and increoses at the radius so that
the most importont port of the tool
has excessive clearance and
less
Figure 7
life than the some tool with cone
relief.
/
...... 10· UAO CUTTING
R£LIF ANGLE
T\-:W: ':E
Figure 6
.... 10' UAD WmNG
RnIJ ANGU
10' END CUTnNG
"
RlW ...NOO
.
i
(
r
Diagram shows effects o f
cylindricol grind with wariable
relief around the profile of the
cutting edge, resulting in greu;.
in maximum
est clearance 0' lip of rodius.
life.
,
,
42· END (UTTItlG
EDGE ANGLl
Diagram shows effects of
(one grind with (onstanl
relief around the profile of
the (lifting edge. re,ulting
1001
END CumNG
RllIEJ ANOO
Figure 8
.125 RADIUS
--1_
10'
14'38'
V
A (j/}iver�al 9ingle Point Tool Grinder ror
MICROBORE TOOLS
•
SQUARE TOOL BITS
•
ROUND SHANK TOOL BITS
�KI1/ I� not �eq(Jiterl to gtind GAGE AOO(J�ATE toolpoint�/
3.
CONSTANT RELIEF ANGLE ADJUSTMENT
AFTER SETTING
4.
VARIABLE RELIEF ANGLE ADJUSTMENT
5.
TABLE STROKE ADJUSTMENT
7.
END CUTTING ANGLE ADJUSTMENT
the face of a new or worn grinding
wheel 10 the zero gage (shown in Figure 18 on the back
cover), all further settings are made on direct reading dials.
THE SIMPLICITY
of adjustment by direct dial setting is
shown in the seven illustrations.
THE OSCILLATION
of the 1001 holder is hand operated
and is cushioned at each end of the stroke. Extremely
high finish in addition 10 great accuracy is largely due to
the smooth vibrationless and rigid relation between the
grinding wheel and the work.
•
Geometrically correct constant relief proven to give much
greater tool life.
•
More pieces per tool grind drastically reduces down time of
machine tools.
Improved finish and uniformity of parts increases operator
output-minimizes reiects.
•
6.
LEAD CUTTING ANGLE ADJUSTMENT
Typical examples of Single Point Tools ground to exact
See
Figure 12
TOOL</:
.050
.051 RADIUS
/10
'.001/
r·0625 TO et OF RADIUS
'
;
j
\
42 ,//1 ' ... 538'
I
''v ' '
V
,
:-'"1�
7
1=-.
=:---'-.
,-.
'.002
.. .087 TO </:
RADIUS
</: TOOL
\60
A f
"'-!
VARIABLE RELIEF ANGLE
CONSTANT RELIEF ANGL.E
Figure 9
Figure 1 0
"
TOOL </: j '
o�
C]
--"' I
T
.
'\
:
I
,
\
/
45{ REF
!
5'
r
.250r
r:jt 203 TO </: OF RADIUS
--':
.047
'
:
:,
]}48
RADIUS
7
I
,d'I
I
,
I
,
1------
J
Figure 11
Ii=--'
\
8
CONSTANT RELIEF ANGLE
Figure 12
. 6·
CONSTANT RELIEF ANGLE
geometric requirements on the Micropoint Tool Grinder
See
Figure 16
See
Figure 15
5
10
1J,�'
Q.
lb
16 .010
;8
, �
L
.109
_
<t TOOL
6
11
RADIUS
75
l
tj
:-gj
VARIABLE RELIEF ANGLE
Figure
�!
13
J
8r �
.0860 �r .0.780005
w-�
I25
�6 53
I
TOOL<t
I
,
"
.005
RADIUS ,.
730'
6
,
45
CONSTANT RELIEF ANGLE
Figure 14
3
6
,
CONSTANT RELIEF ANGLE
15
15
730'
14
Figure
TO SHARP CORNERS
RADIUS
11i6
VARIABLE RELIEF ANGLE
Figure 16
Micropoint Wheel Setting Goge Assembly, No.
SG-10aO, is a precision instrument equipped with
0
stondard dial indicator reading to .001" and is
used os shown in Figure I 8 to odjust the foce of
the Micropoint Grinder wheel to zero radius.
Micropoint Wheel Setting Goge Assembly, No.
SG-IOOO, for odjusting both new ond worn grind­
ing wheels to zero radius, is furnished as
unit in
0
0
complete
fitted wooden case as shown in Figure 17.
Micropoint Grinding Accessories are available singly or in complete sets
Figure 20
Microbore Adopter Kit (Figure 19) for grinding
Microbore Adopter Kit (Figure 20) for grinding conventional
Microbore Cartridges, sizes 1 through 10, contains
Vs" to Y2* round and 1A" to 1" square tool bits contoins a
o complete set of Series DGH-IOOO occessories
complete set of Series DGH-2000, for round
and includes an octogonal master block, neces­
Series OGH-3000, for square types, accessories and includes
types, and
sary adapters, dials, screws and wrenches
on octagonal master block, necessary adapters, screws and
mounted in a fitted wooden case.
wrenches, mounted in a fitted wooden case.
SER. NO. 416
-
300