US1360358A - Gear - Google Patents
Gear Download PDFInfo
- Publication number
- US1360358A US1360358A US231422A US23142218A US1360358A US 1360358 A US1360358 A US 1360358A US 231422 A US231422 A US 231422A US 23142218 A US23142218 A US 23142218A US 1360358 A US1360358 A US 1360358A
- Authority
- US
- United States
- Prior art keywords
- teeth
- gear
- blank
- die
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 description 17
- 238000007723 die pressing method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49462—Gear making
- Y10T29/49467—Gear shaping
- Y10T29/49474—Die-press shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19949—Teeth
- Y10T74/19963—Spur
Definitions
- ()ne objectof this invention is to provide gears having teeth denser at and adjacent the faces than elsewhere.
- Another'object of. his invention is to provide gears having teeth the faces of which are compressed and die finished and the tops of which have a cut finish.
- Fig. 2 is a similar view of the'blank after leaving the roughing die
- Fig. 3 is a similar view of the blank after leaving the finishing die and before the excess metal hasbeen removed;
- Fig. 4 is a similar view of the finished gear
- Fig. 5 is a plan view of half of a finished 7 gear like that shown in Fig. 4:;
- Fig. 6 is a fragmentary enlarged end elevation of several of the teeth of the finished gear showing in dotted lines the contours of the teeth in various stages of completion;
- Fig. 7 isan enlarged sectional view of the finished gear showing in dotted lines the contours of a tooth in various stages of completion.
- This invention involves die pressing a blank to form teeth by displacing the metal of the blank with space forming die parts so that metal extends beyond the normal limits, as the tops, for instance, of the teeth, and then removing the excess, as by grinding or machining.
- the blank may be so
- This invention relates to gears and. gear manufacture and particularly to gears supported that: some excess metal will be pressed outwardly at the ends of the teeth, and this excess metal may likewise be removed.
- the invention also involves die pressing a blankhaving teeth of abnormal proportions so that the teeth arepresse'd into the desired,
- a blank having teeth of abnormal thickness is die pressed so that the sides of the teeth are compressed to the desired face contour.
- the abnormally thick teeth may be formed by forging or die pressing with a roughing die.
- a gear blank having a plain fa DCs' drop forged is then placedin adie 'presswhere a roughing die forms teeth of abnormal thickness and preferably of less height than the required finished tooth, is then subjected to a second die pressing .operation in which a finishing die compresses the thick teeth to the desired contour and forces excess metal outwardly beyond the normal tops and perhaps at the ends of the teeth, and is then machined or ground to remove the excess metal.
- the last step is the hardening of the finished gear. Gears made by this method will be found in most cases to be accurate enough for the finest work, but if desired a finishing cut may be made on the faces of the teeth before hardeningto give a still greater degreeof accuracy;
- a gear blank in Fig. 1 it is a plain blank 30 having a web portion 31 and a portion 32 in which the gear teeth are to be formed.
- the blank B is shown as having teeth 33 which are thick relative to the spaces between them and not as high as the teeth of the finished gear should be. As shown the teeth and spaces have no sharp corners it thereby being possible to form such a blank either by a quick rough pressing process or by drop forging. As shown also, the teeth are arranged in a generally diagonal direction and are curved lengthwise, but other desired forms of teeth may be made. 7 i r In Fig. 3 the gear blank B is shown as having its teeth 33 formed with correct faces 34 but an excess of metal extends above the normal tops of the teeth as shown at 35;
- Figs. 4 and 5 the gear blank B has become a finished gear 38, the excess metal above referred to having been entirely removed either by machining or grinding, thus leaving a cut finish at the tops and on the ends of the teeth.
- Figs. 6 and 7 enlarged views of gear teeth are shown, 35, 36 and 3'7 representing in dotted lines the excess metal that has been removed, and these views illustrate the clean sharp edges that are obtained by thus pressing the teeth and subsequently removing the excess metal.
- the dotted line 39 traces an outline of the tooth 33 of the gear shown in Fig. 2 as it comes from the roughing die.
- a metal gear having teeth having teeth, the faces of which have a. die finish and the tops and ends of which have a cut finish.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Description
Patented Nov. 30, 1920.
I l Illllll UNITED" STATES PATENTOFFICE.
FRANK r. B AL or nn morr, MICHIGAN, ASSIGNOR To rAoKArtDi/ro'rort oAaoou PANY, or nnraorr, MICHIGAN. A CORPORATION. or MICHIGAN.
Original application filediiecembr 23, 1914, Serial No. 878,733. Divided and this application filed April 29, 1918. Serial No. 231,422.
Toallwhomitmay concern: 7
Be it known that I, FRANK F. BEALL, a
citizenof the United States, and resident of division of applicafiled December 23,
7 formed by pressing or forging as distinguished from cutting or casting.
()ne objectof this invention is to provide gears having teeth denser at and adjacent the faces than elsewhere.
Another'object of. his invention is to provide gears having teeth the faces of which are compressed and die finished and the tops of which have a cut finish.
Other objects ofthe invention will appear from the following description, taken in connection with the drawings which form a part of the specification and in which Figure 1 is a part elevation and part section of a gear blank in the form in which it leaves the drop hammer;
Fig. 2 is a similar view of the'blank after leaving the roughing die;
Fig. 3 is a similar view of the blank after leaving the finishing die and before the excess metal hasbeen removed;
Fig. 4 is a similar view of the finished gear; i
Fig. 5 is a plan view of half of a finished 7 gear like that shown in Fig. 4:;
Fig. 6 is a fragmentary enlarged end elevation of several of the teeth of the finished gear showing in dotted lines the contours of the teeth in various stages of completion; and
Fig. 7 isan enlarged sectional view of the finished gear showing in dotted lines the contours of a tooth in various stages of completion.
This invention involves die pressing a blank to form teeth by displacing the metal of the blank with space forming die parts so that metal extends beyond the normal limits, as the tops, for instance, of the teeth, and then removing the excess, as by grinding or machining. The blank may be so This invention relates to gears and. gear manufacture and particularly to gears supported that: some excess metal will be pressed outwardly at the ends of the teeth, and this excess metal may likewise be removed.
The invention also involves die pressing a blankhaving teeth of abnormal proportions so that the teeth arepresse'd into the desired,
shape. As illustrated herein, a blank having teeth of abnormal thickness is die pressed so that the sides of the teeth are compressed to the desired face contour. The abnormally thick teeth may be formed by forging or die pressing with a roughing die. g In the form of theinvention particularly set forth herein, a gear blank having a plain fa ceis' drop forged, is then placedin adie 'presswhere a roughing die forms teeth of abnormal thickness and preferably of less height than the required finished tooth, is then subjected to a second die pressing .operation in which a finishing die compresses the thick teeth to the desired contour and forces excess metal outwardly beyond the normal tops and perhaps at the ends of the teeth, and is then machined or ground to remove the excess metal. The last step is the hardening of the finished gear. Gears made by this method will be found in most cases to be accurate enough for the finest work, but if desired a finishing cut may be made on the faces of the teeth before hardeningto give a still greater degreeof accuracy;
A gear made in; accordance with the above Specification of Letters Patent. Patented NO 30, 1920,
referred to methodis shown herein and comgenerally a gear blank and in Fig. 1 it is a plain blank 30 having a web portion 31 and a portion 32 in which the gear teeth are to be formed. In Fig. 2 the blank B is shown as having teeth 33 which are thick relative to the spaces between them and not as high as the teeth of the finished gear should be. As shown the teeth and spaces have no sharp corners it thereby being possible to form such a blank either by a quick rough pressing process or by drop forging. As shown also, the teeth are arranged in a generally diagonal direction and are curved lengthwise, but other desired forms of teeth may be made. 7 i r In Fig. 3 the gear blank B is shown as having its teeth 33 formed with correct faces 34 but an excess of metal extends above the normal tops of the teeth as shown at 35;
the dotted lines 35 representing the normal top of one of the teeth. Some of the excess metal has also been pressed outwardly at the ends of the teeth as at 36 and 37. Aside from the excess metal above referred to, the teeth of the gear shown in Fig. 3 are perfectly formed and would be ready for use.
In Figs. 4 and 5 the gear blank B has become a finished gear 38, the excess metal above referred to having been entirely removed either by machining or grinding, thus leaving a cut finish at the tops and on the ends of the teeth. In Figs. 6 and 7 enlarged views of gear teeth are shown, 35, 36 and 3'7 representing in dotted lines the excess metal that has been removed, and these views illustrate the clean sharp edges that are obtained by thus pressing the teeth and subsequently removing the excess metal. In thesefigures also the dotted line 39 traces an outline of the tooth 33 of the gear shown in Fig. 2 as it comes from the roughing die.
Ordinarily the gear thus completed will be sufficiently accurate for use, but if desired a machining or grinding process may be carried out on the faces of the teeth before it is case hardened. Case hardening gives the desired wearing qualities to the faces of the teeth and is particularly efficient when combined with the compressing of the gear teeth as herein described.
It will be understood that the invention is not limited to the specific gear herein shown and described, but is capable of modification in various ways without departing from the scope of the claims.
Having thus described my invention. What I claim and desire to secure by Letters Patent is I 1. A metal gear having teeth of denser formation at and adjacent the side faces than on the top surfaces therof.
2. A metal gear having teeth of denser formation at and adjacent the side faces than on the top and end surfaces thereof.
3. A metal gear having teeth, the faces of which have a die finish and the topsurfaces of which have a cut finish.
4. A metal gear having teeth, the faces of which have a. die finish and the tops and ends of which have a cut finish.
In testimony whereof I aflix my signature.
FRANK BEALL.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US231423A US1332968A (en) | 1914-12-23 | 1918-04-29 | Mechanism for forming gears |
US231422A US1360358A (en) | 1914-12-23 | 1918-04-29 | Gear |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87873314A | 1914-12-23 | 1914-12-23 | |
US231423A US1332968A (en) | 1914-12-23 | 1918-04-29 | Mechanism for forming gears |
US231422A US1360358A (en) | 1914-12-23 | 1918-04-29 | Gear |
Publications (1)
Publication Number | Publication Date |
---|---|
US1360358A true US1360358A (en) | 1920-11-30 |
Family
ID=27398185
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US231422A Expired - Lifetime US1360358A (en) | 1914-12-23 | 1918-04-29 | Gear |
US231423A Expired - Lifetime US1332968A (en) | 1914-12-23 | 1918-04-29 | Mechanism for forming gears |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US231423A Expired - Lifetime US1332968A (en) | 1914-12-23 | 1918-04-29 | Mechanism for forming gears |
Country Status (1)
Country | Link |
---|---|
US (2) | US1360358A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2713277A (en) * | 1950-09-02 | 1955-07-19 | Mullins Mfg Corp | Method of cold forming ring gears |
US3298219A (en) * | 1963-04-24 | 1967-01-17 | Bayerisches Leichlmetallwerk K | Method and device for producing active profiles on bevel gears |
US5575171A (en) * | 1993-10-22 | 1996-11-19 | Nsk Ltd. | Process and apparatus for the production of webbing take-up spindle |
EP1027464A1 (en) * | 1997-08-11 | 2000-08-16 | McDONNELL DOUGLAS HELICOPTER COMPANY | Face-gear forging method |
US20060157542A1 (en) * | 2003-07-11 | 2006-07-20 | Joachim Rosler | Method for machining a workpiece made from a titanium-based alloy |
US20110016944A1 (en) * | 2009-07-24 | 2011-01-27 | Canon Kabushiki Kaisha | Method of producing metallic member |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2920378A (en) * | 1947-11-29 | 1960-01-12 | Gen Motors Corp | Manufacture of commutators |
US3034383A (en) * | 1957-03-25 | 1962-05-15 | Otto Fuchs Kommandit Ges | Synchromesh gear and method and apparatus for making the same |
-
1918
- 1918-04-29 US US231422A patent/US1360358A/en not_active Expired - Lifetime
- 1918-04-29 US US231423A patent/US1332968A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2713277A (en) * | 1950-09-02 | 1955-07-19 | Mullins Mfg Corp | Method of cold forming ring gears |
US3298219A (en) * | 1963-04-24 | 1967-01-17 | Bayerisches Leichlmetallwerk K | Method and device for producing active profiles on bevel gears |
US5575171A (en) * | 1993-10-22 | 1996-11-19 | Nsk Ltd. | Process and apparatus for the production of webbing take-up spindle |
EP1027464A1 (en) * | 1997-08-11 | 2000-08-16 | McDONNELL DOUGLAS HELICOPTER COMPANY | Face-gear forging method |
EP1027464A4 (en) * | 1997-08-11 | 2005-10-05 | Mc Donnell Douglas Helicopter | Face-gear forging method |
US20060157542A1 (en) * | 2003-07-11 | 2006-07-20 | Joachim Rosler | Method for machining a workpiece made from a titanium-based alloy |
US20110016944A1 (en) * | 2009-07-24 | 2011-01-27 | Canon Kabushiki Kaisha | Method of producing metallic member |
Also Published As
Publication number | Publication date |
---|---|
US1332968A (en) | 1920-03-09 |
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