GB274859A - New or improved method and apparatus for finishing or rectifying meshing parts and particularly gear teeth - Google Patents
New or improved method and apparatus for finishing or rectifying meshing parts and particularly gear teethInfo
- Publication number
- GB274859A GB274859A GB19004/27A GB1900427A GB274859A GB 274859 A GB274859 A GB 274859A GB 19004/27 A GB19004/27 A GB 19004/27A GB 1900427 A GB1900427 A GB 1900427A GB 274859 A GB274859 A GB 274859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- teeth
- blank
- tools
- tool
- work
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
- B23F19/02—Lapping gear teeth
- B23F19/04—Lapping spur gears by making use of a correspondingly shaped counterpart
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
Abstract
274,859. Lees-Bradner Co., (Assignees of Schurr, C. H.). July 21, 1926, [Convention date]. Rolling wheels; die-rolling. - In a method of finishing the teeth of roughed-out gears or the projections or lobes of machine parts, the work is rolled in mesh with a tool having accurately formed and spaced teeth &c., axial feed being imparted to the work or tool so that the tool moves progressively over the teeth in axial direction and redistributes the metal on the surfaces of the rough teeth to produce accurate teeth with hardened working faces. In one form, a frame 1 is bored to receive a number of tool-spindles 3 carrying accurately-cut tools 5 - - 8 which are spaced around the rough-cut blank 15 mounted on a central spindle 11. The frame 1 may be moved axially of the blank to carry the tools over the tooth surfaces, and the tools are all driven from a long pinion 13 on the blank spindle which engages gears 4. The gears 4 and 13 have accurately cut teeth and the tools are rotated relatively to the blank at their correct meshing speeds and are maintained at fixed radial distances from the blank axis. The upper ends of the teeth on the tools are preferably chamfered at 23, Fig. 8. In operation, as the rotating tools in meshing engagement with the work are advanced axially, the teeth 20 of the tools redistribute the outer layer of metal on the blank teeth and finally produce teeth on the blank which are accurate as to pitch, profile and concentricity and have increased hardness, density &c. Some of the metal of the blank teeth may be moved forward by the chamfered tool edge in the form of a ridge 24, Fig. 8, and this surplus metal may form ridges along the outer ends of the finished teeth. These ridges may either be removed by a subsequent operation or may be left on the gear. The normal axial feed of the tools may be of the order of 5/1000‹ per revolution of the blank. The steepness and shape of the tooth chamfer may be modified in various ways and in some cases the teeth may have only a small finished portion 27, Fig. 14, chamfered off in both directions. Such a tool may be passed through the blank in either direction. If only one tool is employed, the engagement between tool and work will, on the pitch line, be of a purely rolling character without slipping and in order to render the action equally effective on all parts of the blank tooth profile, the teeth of the tools are preferably made of different pressure angles as shown in Fig. 3. The different tools thus engage the blank on pitch circles 35, 37, 39, 41, which are spaced at various distances from the. base circle 34 of the blank teeth. In a modification, the tools may have successively larger diameters but are provided with teeth having base circles of the same diameter. In another modification, the work spindle may remain stationary and the tool spindles revolved about it. Other arrangements of one or more tool-spindles and the work-spindle may be employed. Fig. 20 shows an example of a lobed form to which the invention is applicable.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US274859XA | 1926-07-21 | 1926-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB274859A true GB274859A (en) | 1928-11-19 |
Family
ID=21838005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19004/27A Expired GB274859A (en) | 1926-07-21 | 1927-07-18 | New or improved method and apparatus for finishing or rectifying meshing parts and particularly gear teeth |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB274859A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423593A (en) * | 1945-12-03 | 1947-07-08 | Farrel Birmingham Co Inc | Method of lapping gears |
-
1927
- 1927-07-18 GB GB19004/27A patent/GB274859A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423593A (en) * | 1945-12-03 | 1947-07-08 | Farrel Birmingham Co Inc | Method of lapping gears |
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