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Publication numberUS1629667 A
Publication typeGrant
Publication dateMay 24, 1927
Filing dateOct 15, 1926
Priority dateOct 15, 1926
Publication numberUS 1629667 A, US 1629667A, US-A-1629667, US1629667 A, US1629667A
InventorsJames D Knipple
Original AssigneeJames D Knipple
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Metal-cutting tool
US 1629667 A
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Description  (OCR text may contain errors)

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ag MM 64% War/MK Patented May 24, 1927,.

UNITED ,STATES PATENT OFFICE METAL-CUTTING roon.

Application filed October 15, 1926. Serial No. 141,751. g

This invention relates to metal cutting tools and while not limited thereto, relates more particularly to tools for use in heavy duty planers such as are used in planing railway frogs, crossovers and other heavy steel structures.

In the commercial production of railway track structures such as frogs, crossovers, and the like, it is necessary to form certain parts by planing operations and, in order to reduce the cost of these operations to a minimum, heavy duty planing machines have been develo ed capab e of making deep cuts by using a igh grade of special highspeed tool steel tools.

Heretofore the high-speed tool steel tools for use in these machines have consisted of a standard steel holder with a high-speed tool steel cutter or bit welded thereto, and when the cutting edge of the cutter or bit was worn down, due to continual sharpening, the entire tool had to be discarded, resulting in the loss of the tool-holder and the. remaining portion of the high-speed tool steel bit.

The present invention provides a tool composed of a tool or bit holder having a delnountable high-speed tool steel cutter or' bit which may be replaced when worn, and the worn bit may be reused in tools having shorter heads, thereby entirely reducing the loss resulting from discarding the tool-holders and materially reducing the loss resulting from the discarding of .the worn bits or cutters.

In the drawings- Figure 1 is a side elevation of a tool constructed in accordance with this invention.

' Figure 2 is a plan view of the bit supporting head of the tool holder.

Figure 3 is a similar view with the tool bit removed.

Figure 4 is a perspective View of the tool bit.

Figure 5 is a perspective view of the head end of the tool holder.

Referring more articularly to the drawings, the letter A esignates the tool-holder as a whole, which supports a cutter-or bit B.

The tool-holder A comprises a squared shank portion 2 terminating at its lower end in an enlarged bit supporting head 3. The head 3 has its forward face recessed from its lower end upwardly and inwardly forming a cutter or bit seat 4. The rear wall of the seat 4 is provided with a slot 5 extendin axis 0 the tool and the top wal of said seat is undercut toprovide an overhanging beveled retaining flange 6.-

The high-speed tool steel bit B is mounted in the seat 4 and comprises a bod ortion 7 having its upper end face beve e as at 8, so as to PI'OJQCt and engage underthe retaining flan 'e 6. The rear face of the bit B is provided with a, transversely extending supporting rib 9 adapted to extend into the slot 5, and serves to prevent twisting of the bit under heavy duty. The lower end of the bit B is cut away to form a pr jecting cutting nose 10, and the lower end of the head 3 of the holder A is provided with a centrally disposed rib 12 adapted to engage the bit and reinforce and support the nose 10.

A bolt 13 is passed through the head 3 and the bit B and provided with, a nut 14 for locking the bit B in position and preventing displacement. thereof.

In use the bits B may be sharpened by grinding without removing them from the holders A, as is usual until their cutting edges are cut down too close to'the holders. After the bits B have their cuttin edges ground down too close to the hol ers A, the bits are removed and new bits substituted therefor. i

The bits removed from the holders as above described, may then be fitted to new holders having shorter heads 3 so as to again expose their cutting edges and permit their use, or such bits maybe mounted in lighter and smaller tool holders for use in other machines as desired, so that the maximum amount of the high-speed tool steel bits may be utilized before they need be discarded.

at right angles to the lon itudinal While I have shown and described one specific embodiment of my invention, it will be understood that I do not wish to be limited thereto since various modifications may be made without departing from the scope of my invention as defined in the appended claims.

I claim- 1. A tool of the class described, comprising a shank, an enlarged cutter supporting head formed integral with the. lower end of said shank, said head having its forward face recessed from its lower end upwardly and inwardly to form a cutter, bitsea't, the rear wall of said seat being provided with a slot extending at right angles to the longitudinal axis of the tool and the top wall of said seat being undercut to provide an overhanging retaining flange, and a high-speed tool steel cutter bit mounted in, said cutter seat, said bit having its upper end beveled so as to project andengage under said retaining flange, a supporting rib projecting from the rear face of said bit and engaged in said slot in the rear wall of said seat, and means for locking said bit against displacement relative to said seat.

2. A tool of the class described, comprising a shank, an enlarged cutter supporting head formed integral with the lower end of said shank, said head having its forward face recessed from its lower end upwardly and inwardly to form a cutter bit seat, the rear wall of said seat being provided with a slot extending at right angles to the longitudinal axis of the tool and the top wall of said seat being undercut to provide an overhanging retainin flange, and a high-speed tool steel cutter it mounted in said cutter seat, said bit havin its upper end beveled so as to roject and engage under said retaining ange and its lower end cut awa to form a cutting nose, a supporting ri projecting from the rear face of said bit andengaged in said slot in the rear wall of said seat, a bolt passing through said cutter supporting head and saidbit to lock said bit against displacement, and means formed integral with the lower end of said head for supporting said cutting nose.

In testimony whereof, I have hereunto signed my name.

JAMES D. KNIPPLE.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2598581 *Sep 4, 1948May 27, 1952Kennametal IncCutting tool
US3136031 *Jul 11, 1961Jun 9, 1964Cassidy James PTool holder
US3192604 *Aug 9, 1963Jul 6, 1965Gleason WorksAdjustable face mill cutter
US3548473 *Mar 27, 1968Dec 22, 1970Warner Swasey CoPocket-type cutting insert
US3775817 *Jan 11, 1972Dec 4, 1973Hertel KTurning tool
US5542795 *Jan 30, 1995Aug 6, 1996Kennametal Inc.Plunge and face milling cutter with universal insert seats
US5810518 *Sep 24, 1996Sep 22, 1998Sandvik AbFastening arrangement for cutting inserts and a cutting insert intended for such an arrangement
US5842819 *Sep 18, 1996Dec 1, 1998Meiler; RuediFor beveling edges on workpieces
US5924826 *Oct 28, 1996Jul 20, 1999Sandvik AbCutting insert mounted on holder by rib-and-groove coupling
US6190095Nov 5, 1997Feb 20, 2001Erik SchmidtInsert securing device
US7201545 *Oct 14, 2005Apr 10, 2007Seco Tools AbTool, a cutting insert, a shim and use of the cutting insert
US7537419 *Feb 8, 2005May 26, 2009Sandvik Intellectual Property AbCutting tool, with serrated connecting surfaces on the insert and insert seat
US8246130 *Apr 15, 2004Aug 21, 2012Lg Electronics Inc.Door assembly of refrigerator
US8616809 *Sep 20, 2007Dec 31, 2013James F. FarrellToolholder
US8696260 *Jun 18, 2010Apr 15, 2014Hartmetall-Werkzeugfabrik Paul HornTool for machining, in particular longitudinal turning tool
US20110142556 *Jun 18, 2010Jun 16, 2011Hartmetall-Werkzeugfabrik Paul Horn GmbhTool for machining, in particular longitudinal turning tool
US20110305533 *Jan 6, 2010Dec 15, 2011Leitz Gmbh & Co. KgMilling tool and cutting element for a milling tool
WO1998022245A1 *Nov 5, 1997May 28, 1998Schmidt ErikInsert securing device
Classifications
U.S. Classification407/103
International ClassificationB23B27/16, B23D13/00, B23B27/06
Cooperative ClassificationB23B2200/161, B23B27/06, B23B27/164, B23D13/00
European ClassificationB23D13/00, B23B27/06, B23B27/16D4