close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2129417

код для вставки
.
Sept.‘6.,1938'
a
c. ya. GAs'E:
END MILL
‘
2,129,417
''
Filed March 14', 1956
‘awgi
, 1N VENTOR
Car] 6' ‘6069
.
I
2,129,417‘
Patented Sept. 6, 1938
UNITED _ sTATEs 4 PATENT OFFICE
'
2,129,417 -
END IVIILL
Carl G. Gase, Parma, Ohio, assignor vto Weldon
Tool Company, Cleveland, Ohio, a corporation
of Ohio
Application 'March 14, 1936, Serial No. 68,897
4 Claims.
(01. 29-103)
.
28 extending along each of said ?llets. Upon the
cutting end of each ?llet is a cutting edge 20
cutting tools.
An object of my invention is to provide an end ‘ extending toward the axial center of the end
mill.
mill having greater strength and supporting ac
Extending centrally of the cutting end of the
tion for its cutting edges.
Another object is to provide an end mill having end mill I5, between the cutting edges 20, is an
relatively short cutting edges and a relatively arcuate depressed portion 22. The cutting edges
My invention relates to end mills and other
large face between the cutting edges.
'
Another object is to provide an end mill hav
10
ing cutting edges substantially con?ned to the
‘end of the ?llet.
Another object is to provide an end mill hav
ing a central depressed portion in the body of the
end mill at'the cutting end so as to provide clear
" ance between the said body and the mass to be
cut.
20 are substantially con?nedto ends of the ?llets
| 8 and the arcuate depressed portion 22 extends
across the end of the body portion l9. The cut— 10
ting clearances 2| extend in a slightly sloping
manner from the cutting edges 20.
at the terminus of each of the ?llets IB. These
recesses 24 extend inwardly and are somewhat 15
sloping.
.
There is a
recess 24 cut into the end of the body portion l9
The ?ute clearance 23 extendsv from
each cutting clearance 2| back to each recess 24
Another object is to provide a depressed por
tion in the cutting end of an end mill, which
and slopes from the cutting clearance down to
depressed portion has sloping sides extending in
the niche or recess 24 and also slopes slightly out
wardly so as to converge into the ‘flute.
a gradual and positive slope from the axial center
of the end mill to the cutting edges.
A still further object is to provide an end mill
having an arcuate depressed portion at ‘its cut
ting end, the sloping sides of which arcuate de
pressed portion act as a brace for the cutting
hole 21 in the axial center of the end mill is the
conventional hole used in making the tool. The
edges of the end mill.
arcuate depressed portion is shown extending
>
‘
In Figure 2, the arrangement of the parts upon
the cutting end is well shown by cutting away
a portion of the cutting end. The dead center
A still further object is to provide an arcuate
depressed portion in the cutting end of an end
mill, the sloping sides of which arcuate portion
substantially across the end of the end mill l5
and between the cutting edges 20. The ?llet
upon the rear side of the end mill is shown as
act as a brace for the peripheral portion of the
end mill at the cutting end.
>
extending out beyond the arcuate depressed por
ing, taken in conjunction with the following de
scription and claims, in which:
Figure 1 represents a side view of my end mill;
edge.
Figure 3 being a view looking at the left end
of the end mill of Figure 1, shows in detail the
Figure 2 represents a view of my end mill with
arrangement of the respective parts upon the cut
ting end of the end mill. The arcuate depressed
tion, and the narrower side 25 of the ?llet I8,
Other objects and a fuller understanding may _' is shown as pointing down. The longitudinal
edges 28 are shown as terminating at the cutting
be had by referring to the accompanying draw
portions of the cutting end cut away to give a
fragmentary view of the cutting end;
40
Figure 3 represents a left-hand end view look
ing at the cutting end of the end mill in Figure 1;
Referring to 'Figure 1, I show an end mill l5
having a flat, surface I6 on its engaging‘end for
securing engagement of the end mill I5 to a shop
machine. The end mill It‘: 'has a plurality of
spiral ?utes |‘| formed therein, leaving the ?llets
l8 in raised position extending longitudinally of
the end mill l5 between the ?utes _|‘|.- As shown
in the illustration, the ?llets |8 are integral with
-
portion 22 is shown as extending across substan
tially the end of the body of the end mill, having
the dead center hole-21 in the axial center there
of. As the cutting edges 20 are slightly undercut,
only the wider side 26 of each ?llet is shown
spirally up the end mill. The cutting clearance
2| upon each end of the ?llet is shown as de?n
ing a cutting edge 20 upon one side of the cut
ting clearance 2|. Cut down into the end mill is
.the recess or inward cut 24 at the end of each
?ute |'I, so that 'the depression of each ?ute I1
is carried inwardly of the' end mill toward the
the end mill and are extended in a spiral manner
along the end mill.. The body portion or core axial center thereof. The recess 24 acts as a.
I9 is shown in dotted lines' and represents the ‘ limit which aids in de?ning the extent of the flute
body of the end mill |5 within the ?llets l8. Each clearance 23 so that in grinding the ?ute clear
?llet l8 has a narrow side 25 and a wider side ance 23, the grinder need not be brought too close
26 which converge to form a longitudinal edge
to the cutting edges 20. The ?ute clearance 23
20
2
2,129,417
is shown as extending between each of the re
cesses 24 and the cutting clearances 2|. The
surface of the ?ute clearances is sloped at a slight
incline from the cutting clearances 2| down to
the recess 24 and also slopes slightly back to con
verge with the wider side 26 of each ?llet [8.
It is seen by referring to Figures 1, 2, and 3,
that the arcuate depressed portion 22 by its arcu
along the body portion, said ?llets having lon- I
gltudinal cutting edges extending thereon, a lat- .
eral cutting edge on the lateral end face of
each of said ?llets, each said lateral cutting
edge being disposed substantially at right angles
to the longitudinal axis of said mill and the out
er end of each of said lateral cutting edge meet
ing the longitudinal cutting edge of each said
ate nature has walls which act as a substantial
?llet to form a substantially sharp cutting cor
brace and support for the cutting edges 20 on
the end of each ?llet. It is also seen that such a
ing depressed end portion extending across the
structure permit the con?ning of the cutting
end of said body portion intermediate of said
lateral cutting edges and having boundary points
edges 20 to the cutting end of the ?llet without
substantially extending inwardly upon the body
of the end mill. The absence of this supporting
structure would necessitate having much wider
cutting edges and extending inwardly in order to
give su?icient strength to the cutting edges. It is
seen that the stress against the cutting edges 20 .
20 is met not only by‘ the bracing action of the ?llet
back. of each cutting edge, but also by the brac
ing action of the wall of the arcuate depressed
portion 22.
ner, said ?uted member having a gradually slop
10
located near the outer edge of the body portion,
the inner ends of ,the lateral cutting edges being 15
adjacent the outer boundary of the depressed end
portion and extending outwardly toward the
longitudinal cutting edges.
'
3. An end mill capable of cutting at a marked
increase in speed as compared with other end 20
mills in standard practice and at’ the same time
maintaining cutting edges comparable with the
cutting edges of said other end mills, said end
Since the end mill is moved laterally as well as ‘ mill comprising a ?uted body member having a
plurality of ?llets with longitudinal cutting edges 25
25 rotatively, it is necessary to have‘ a clearance
between the center or body of the end mill and
the mass to be cut. This limits the width of the
cutting edges. The advantage of my end mill
with the cutting edges upon the end of the ?llets
30 and a relatively wide depressed arcuate portion
between them, having the sloping walls support
ing and bracing these short cutting edges, is such
that the short cutting edges are not prone to
break off and chip because of lack of support.
My structure in its bracing action gives maxi
mum strength to the .short cutting edges and
permits them to be substantially con?ned to the
cutting end of the ?llet.
Although I have described my invention with
a certain degree of particularity, it is understood
that the present disclosure has been made only
by way of example and that numerous changes
in the details of‘ construction and the combina
tion and arrangement of parts may be resorted to
without departing from the spirit and the scope"
of the invention as hereinafter claimed.
I claim as my invention:
‘
1. An end mill having a plurality of cutting
extending therealong, a lateral cutting edge on
the lateral end face of each of ~said ?llets, each
said lateral cutting edge being disposed substan
tially at right angles to the longitudinal axis of
said mill and the outer end of each said lateral 30
cutting edge meeting the longitudinal cutting
‘edge of each said ?llet to form a substantially
sharp cutting corner, the cutting end of the said
end mill being modi?ed from standard practice
by having a substantial decrease‘ in the length 35
of-the lateral cutting edges and by having a sub
stantial increase in distance between the inner
ends of the lateral cutting edges and by having
a relatively wide and shallow depressed portion
intermediate the inner ends of the lateral cutting
edges, said depressed portion extending to the
inner ends of the lateral cutting edges and deep
ening inwardly toward the longitudinal axis of
the end mill.
-
'
4. An end mill capable of cutting at a marked 45
increase-in speed as compared with other end
mills in standard practice and at the same time I
maintaining cutting edges comparable with the
‘ edges on- a lateral end face of said mill compris- '
cutting edges of said other end mills, said end
ing, in combination, a ?uted member having a
mill comprising a ?uted body member having a
body portion and a plurality of ?llets extending
along the body portion, said ?llets having lon
gitudinal cutting edges extending. thereon, a lat
eral cutting edge on the lateral end face of each
of said ?llets, each said lateral cutting edge be
ing disposed substantially at right angles to the
longitudinal axis of said mill and the outer end
of each saidtlateral cutting edge meeting the
longitudinal cutting edge of each said ?llet to
form a substantially-sharp cutting corner, the
length of each of said lateral cutting edges being
substantially limited to the depth of the ?utes,
said body portion having a depressed portion in
termediate of the inner ends of the lateral cut
65 ting edges, said depressed portion being shallow
adjacent the inner ends of the lateral cutting
edges and having a gradual slope and being deep
‘er inwardly towards the longitudinal axis of
70
the end mill.
2. An end mill having a plurality of cutting
edges on a lateral end face of said mill compris
ing, in combination, a ?uted member having a
body portion and a plurality of ?llets extending
plurality of ?llets with longitudinal cutting edges
extending therealong, a lateral‘cutting edge on
the lateral end face of each of said ?llets, each
said lateral cutting edge being disposed substan
tially at right angles to the longitudinal axis of 55
said mill and the outer end of ‘each said lateral
cutting edge meeting the longitudinal cutting
edge of each said ?llet to form- a substantially
sharp cutting corner, the cutting end of the said
end mill being modi?ed from standard practice 60
by having a substantial decrease in the length of
the lateral cutting edges and by having a sub
stantial increase in distancebetween the inner
ends of the lateral cutting edges and by having
a relatively wide and shallow depressed portion 65
intermediate the inner ends of the lateral cutting
edges, said depressed portion being shallow‘ ad
jacent the inner ends of the lateral cutting edges
and having a gradual slope and being deeper in~
wardlyl towards the longitudinal axis of the end 70
mill.
CARL G. GASE.
Документ
Категория
Без категории
Просмотров
0
Размер файла
358 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа