GB392385A - Improvements in method and means for machining gears - Google Patents
Improvements in method and means for machining gearsInfo
- Publication number
- GB392385A GB392385A GB21288/32A GB2128832A GB392385A GB 392385 A GB392385 A GB 392385A GB 21288/32 A GB21288/32 A GB 21288/32A GB 2128832 A GB2128832 A GB 2128832A GB 392385 A GB392385 A GB 392385A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutter
- cutting
- gear
- teeth
- cutters
- 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
- B23F19/06—Shaving the faces of gear teeth
-
- 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
- B23F19/06—Shaving the faces of gear teeth
- B23F19/066—Shaving the faces of gear teeth with plural tools
-
- 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
- B23F21/28—Shaving cutters
- B23F21/282—Shaving cutters with inserted cutting elements
- B23F21/284—Shaving cutters with inserted cutting elements in exchangeable arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
Abstract
392,385. Gear-cutting. MICHIGAN TOOL CO., 7171, Six Mile Road East, Detroit, Michigan, U.S.A. July 28, 1932, No. 21288. Convention date, July 31, 1931. [Class 83 (iii).] Tools; milling-cutters.-A gear - finishing machine comprises a cutting-tool of rack form provided with spaced cutting edges along the flanks, the rack being adapted to mesh with the gear blank and to be angularly disposed in relation to the gear axis so that relative longitudinal movement of the rack over the gear is accompanied by lateral slippage between the gear and rack to cause the cutting of the gear. In Fig. 1, the cutting tool comprises a body 41 recessed longitudinally to receive a number of centrally bored cutting elements 45 which are clamped together by a bolt 52. The bottom of the recess in the cutter body is provided with lands 46 and one side of each cutter is sloped at 42 to coact with a longitudinal retaining wedge 56 which is forced downwardly and secured by a number of screws 57. The cutters are mounted between endplates 48, 49, the former having a sloping surface engaged by a wedge member 61. Each cutter has a cross section, Fig. 4, substantially of rack tooth form, and the flanks are provided with a number of cutting edges produced by forming a number of grooves 69 in the tooth surface. For gears other than involute, the profile of the cutter may be modified. Alternatively, the grooves in the cutter flanks may be diagonally arranged as shown in Fig. 5, this construction producing a gear of modified profile. The tool shown in Fig. 1 is adapted for the production of spiral gears which are first roughed out by hobbing &c., and then mounted on an arbor 65, Fig. 15, which is gradually fed downwards by a hand-wheel 70 while the tool is reciprocated on a slide 66. The lateral component of the motion between the tooth surfaces of the tool and gear causes the cutting edges of the tool to remove metal from the gear teeth until the required tooth form is reached. A brake is applied to the gear during operation. The inclination of the arbor may be adjusted to cut gears of different spiral angles. For cutting straight spur gears, the cutting elements are arranged diagonally in the cutter body, Fig. 7; the end block 76 being correspondingly formed. The cutter arbor is then arranged with its axis parallel to the flanks of the cutter teeth, the required lateral component for the machining of the teeth being obtained as before. In place of the built-up type of cutter integral cutters may be employed and in some cases the serrated teeth may be arranged round the periphery of a circular cutter. In a modification, Fig. 18, two cutters may be arranged on opposite sides of the blank and the blank may be moved laterally of the cutters by means of a screw 79. In this way the blank is moved from a cutting portion 45 of the cutters on to a parallelly - arranged burnishing portion 81, the two portions being arranged as shown in Fig. 11. One of the cutting tools is driven to rotate the gear and reciprocate the other tool and the tools are moved towards each other during operation. After the hardening operation, the plain cutting teeth may be used for a lapping operation by introducing a suitable lapping compound between the cutter and gear teeth. In another modification the cutting teeth shown in Fig. 1 may be replaced by plain burnishing or lapping teeth. In another modification, Fig. 20, a number of gears arranged on a single arbor may coact with cutters built up either of single extended blades or from a plurality of aligned cutters. In another modification, Fig. 21, a number of circular tools are arranged round a single blank, one of the cutters being driven at 87. The blank arbor is resiliently mounted and the tool 85 is moved downwards until both tools penetrate the blank to the required depth. More than two circular cutters may be arranged in a similar way round the blank and the cutters may be of the same diameter or they may be of different diameters and different pressure angles. The cutting edges of the cutters may be produced by slotting the teeth completely through, Fig. 25, or by cutting serrations, Fig. 26, which may be undercut to provide the required cutting angles. Other methods of shaping the cutting edges are described. In another modification, Fig. 30, the cutter tooth profile may be formed with a portion 99 which modifies the theoretical profile of the generated teeth as shown in Fig. 31 at 100. In a further modification of a circular type of cutter, the cutter is built up of a number of thin gear-shaped laminµ 123, Fig. 33, keyed to a hub 116 and separated by spacer discs 124. The Specification as open to inspection under Sect. 91 states that roughly hobbed teeth may be produced with the addenda relieved as shown in Fig. 31 by means of a hob having teeth 104 as shown in Fig. 35 (Cancelled), wherein the true hob profile is indicated in dotted lines. The teeth of a pinion cutter for roughing out may be similarly modified. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US392385XA | 1931-07-31 | 1931-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB392385A true GB392385A (en) | 1933-04-18 |
Family
ID=21904408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21288/32A Expired GB392385A (en) | 1931-07-31 | 1932-07-28 | Improvements in method and means for machining gears |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB392385A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE751310C (en) * | 1936-07-13 | 1952-10-13 | Nat Broach & Mach | Method for finishing gears |
DE754613C (en) * | 1937-04-05 | 1953-03-09 | Nat Broach & Mach | Method and device for finishing toothed wheels |
DE765553C (en) * | 1935-01-26 | 1954-05-10 | Nat Broach & Mach | Gear shaving machine with a rotating tool provided with gear teeth |
US2683399A (en) * | 1949-11-05 | 1954-07-13 | Fellows Gear Shaper Co | Tool for and method of chamfering gear teeth and method of forming such tool |
DE1083103B (en) * | 1954-01-25 | 1960-06-09 | Fellows Gear Shaper Co | Tool for chamfering the teeth of toothed wheels and other toothed workpieces |
US3006060A (en) * | 1957-12-09 | 1961-10-31 | Nat Broach & Mach | Gear finishing |
US3008218A (en) * | 1957-04-22 | 1961-11-14 | Nat Broach & Mach | Gear tooth chamfering tool |
US3115064A (en) * | 1960-08-19 | 1963-12-24 | Hurth Masch Zahnrad Carl | Gear shaving machine |
US3293805A (en) * | 1963-12-24 | 1966-12-27 | Nat Broach & Mach | Method of honing a gear |
US3832806A (en) * | 1971-12-01 | 1974-09-03 | Int Computers Ltd | Multiedge lapping |
US4583271A (en) * | 1983-04-28 | 1986-04-22 | Illinois Tool Works Inc. | Method and apparatus for burnishing splines and gears using synchronously rotated gears |
EP0665082A1 (en) * | 1994-02-01 | 1995-08-02 | U.S.P.I.T. S.p.A. | A method of forming grooves with cutting edges in the sides of the teeth of a shaving cutter and a tool for carrying out the method |
-
1932
- 1932-07-28 GB GB21288/32A patent/GB392385A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE765553C (en) * | 1935-01-26 | 1954-05-10 | Nat Broach & Mach | Gear shaving machine with a rotating tool provided with gear teeth |
DE751310C (en) * | 1936-07-13 | 1952-10-13 | Nat Broach & Mach | Method for finishing gears |
DE754613C (en) * | 1937-04-05 | 1953-03-09 | Nat Broach & Mach | Method and device for finishing toothed wheels |
US2683399A (en) * | 1949-11-05 | 1954-07-13 | Fellows Gear Shaper Co | Tool for and method of chamfering gear teeth and method of forming such tool |
DE1083103B (en) * | 1954-01-25 | 1960-06-09 | Fellows Gear Shaper Co | Tool for chamfering the teeth of toothed wheels and other toothed workpieces |
US3008218A (en) * | 1957-04-22 | 1961-11-14 | Nat Broach & Mach | Gear tooth chamfering tool |
US3006060A (en) * | 1957-12-09 | 1961-10-31 | Nat Broach & Mach | Gear finishing |
US3115064A (en) * | 1960-08-19 | 1963-12-24 | Hurth Masch Zahnrad Carl | Gear shaving machine |
US3293805A (en) * | 1963-12-24 | 1966-12-27 | Nat Broach & Mach | Method of honing a gear |
US3832806A (en) * | 1971-12-01 | 1974-09-03 | Int Computers Ltd | Multiedge lapping |
US4583271A (en) * | 1983-04-28 | 1986-04-22 | Illinois Tool Works Inc. | Method and apparatus for burnishing splines and gears using synchronously rotated gears |
EP0665082A1 (en) * | 1994-02-01 | 1995-08-02 | U.S.P.I.T. S.p.A. | A method of forming grooves with cutting edges in the sides of the teeth of a shaving cutter and a tool for carrying out the method |
US5720585A (en) * | 1994-02-01 | 1998-02-24 | U.S.P.I.T. S.P.A. | Method of forming grooves with cutting edges in the sides of the teeth of a shaving cutter |
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