GB238935A - Improvements in or relating to gear cutting machines - Google Patents
Improvements in or relating to gear cutting machinesInfo
- Publication number
- GB238935A GB238935A GB1290524A GB1290524A GB238935A GB 238935 A GB238935 A GB 238935A GB 1290524 A GB1290524 A GB 1290524A GB 1290524 A GB1290524 A GB 1290524A GB 238935 A GB238935 A GB 238935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hob
- blank
- shaft
- axis
- gears
- 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
- B23F9/00—Making gears having teeth curved in their longitudinal direction
- B23F9/08—Making gears having teeth curved in their longitudinal direction by milling, e.g. with helicoidal hob
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/12—Milling tools
- B23F21/16—Hobs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/12—Milling tools
- B23F21/16—Hobs
- B23F21/18—Taper hobs, e.g. for bevel gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F9/00—Making gears having teeth curved in their longitudinal direction
- B23F9/08—Making gears having teeth curved in their longitudinal direction by milling, e.g. with helicoidal hob
- B23F9/082—Making gears having teeth curved in their longitudinal direction by milling, e.g. with helicoidal hob with a hob
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
Abstract
238,935. Saito, M. May 26, 1924. Gear-cutting; milling-cutters.- Bevel gears with curved teeth are cut by means of a taper or cylindrical hob of variable pitch, the curve of the hob teeth being such that the development on a plane surface may be expressed by the equation :-y = Ax<2> + Bx + C in the case of a cylindrical hob, or @ = A<1># + B' log p + C' in the case of a taper hob. Fig. 1 shows the relative positions of a hob 2 blank 3 and the imaginary crown wheel 1 which the hob represents. From the speed relations which must exist between the rotation of the blank and hob it is shown that the angular velocity v of the hob is given by v = - (V<1> - v<1>/sin@) where n = no. of threads on hob, N<1> = no. of teeth on blank, V<1 >= Angular velocity of blank on its axis, v' = Angular velocity of blank relative to hob about the axis 0, @ = cone angle. of the blank. In Fig. 3 the X axis is the trace of the plane containing the hob axis and perpendicular to the crown wheel plane, the line FG denoting a tooth on the crown wheel and 4 the developed tooth of a hob. FH being the common tangent. From the condition that this tangential relation must exist at all points along the hob it is shown that the equation of the line 4 is y = 1/2R x<2>- @N/Rnx, where R = length of line O E, r = radius of hob pitch cylinder. The Specification also describes the cutting of gears by means of a cutter having a conical pitch surface, and it is shown that in this case the developed curve of the hob teeth may be expressed by the equation @ = A<1> @ + B<1> log p + C<1>. A machine for cutting gears according to this method is shown in Figs. 5 and 0. The hob spindle is mounted in a member 8 and can be secured in the desired angular position on a slide 9 which is rotated about the axis O O<1> to give the angular movement v<1> to the hob by means of a pinion 11 engaging a toothed sector and driven from the pulley 12 through shaft 18, reversing change gears 20, shaft 22, and worm gearing 21. The hob spindle is also driven from the pulley 12 through shafts 13, 14, differential gearing 25. shaft 15, reversing bevel gearing 27, and shaft 17. The planet member of the differential gear is driven from a shaft 23 which is connected by change gears to the shaft 22 to compensate for the rotarv movement of the tool head. The shaft 31 of the hob-driving train is connected by change-gears to a shaft 32 driving through the gearing shown in Fig. 5, a worm-wheel 39 on the spindle carrying the blank 3. The blank holder 37 is angularly adjustable about the axis O 0<1> so that the blank may be adjusted to a position corresponding with the central line O C<111> in Fig. 1. the teeth being completely formed by movement between the positions O C' and O C". Specifications 208.177, 220,027, 230,884 and 230,885 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1290524A GB238935A (en) | 1924-05-26 | 1924-05-26 | Improvements in or relating to gear cutting machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1290524A GB238935A (en) | 1924-05-26 | 1924-05-26 | Improvements in or relating to gear cutting machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB238935A true GB238935A (en) | 1925-08-26 |
Family
ID=10013276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1290524A Expired GB238935A (en) | 1924-05-26 | 1924-05-26 | Improvements in or relating to gear cutting machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB238935A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5791840A (en) * | 1993-04-08 | 1998-08-11 | Crown Gear B.V. | Method of producing a crown wheel |
US11338380B2 (en) * | 2015-10-15 | 2022-05-24 | Danfoss Power Solutions S.R.L. | Rotating machine tool and process for cutting gearwheels with asymmetrical teeth |
-
1924
- 1924-05-26 GB GB1290524A patent/GB238935A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5791840A (en) * | 1993-04-08 | 1998-08-11 | Crown Gear B.V. | Method of producing a crown wheel |
US11338380B2 (en) * | 2015-10-15 | 2022-05-24 | Danfoss Power Solutions S.R.L. | Rotating machine tool and process for cutting gearwheels with asymmetrical teeth |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2230418A (en) | Gear | |
GB238935A (en) | Improvements in or relating to gear cutting machines | |
US2070191A (en) | Method of cutting gears | |
GB491077A (en) | Improvements in apparatus for trimming grinding worms for finishing bevel gears | |
US1633051A (en) | Method of generating gears | |
GB561067A (en) | Improvements in eccentric gear mechanism | |
GB282784A (en) | Improvements in toothed gears for angular transmission, and a method of, and apparatus for, the cutting thereof | |
GB266163A (en) | Improvements in or relating to toothed gearing | |
US2579422A (en) | Method and machine for generating offset face gears | |
GB359382A (en) | Machine for milling or rectifying toroidal surfaces | |
GB228553A (en) | Improvements in or relating to the generation of gears | |
US1323382A (en) | Machine for generating gear teeth, | |
GB338436A (en) | A method or process and machine for cutting bevel or conical gears | |
GB1251944A (en) | ||
GB1072237A (en) | A method of cutting longitudinally curved and cambered teeth of a pair of bevel gears or hypoid gears | |
GB373851A (en) | Improvements in and relating to bevel gears and to apparatus for cutting the same | |
US1037571A (en) | Process for cutting helical gear-wheels. | |
SU691259A1 (en) | Gear cutting machine for the manufacture of bevel gears | |
GB215390A (en) | Improvements in or relating to gear cutting machines | |
US2545151A (en) | Gear-hobbing machine | |
SU144707A1 (en) | Adaptation to the hobbing machine | |
US2660839A (en) | Tooth face grinder | |
GB284718A (en) | ||
US1221432A (en) | Means for generating the teeth of irregular gears. | |
GB301938A (en) | Improved process of and apparatus for generating worm gearing |