GB633060A - Method and apparatus for manufacturing twist drills - Google Patents
Method and apparatus for manufacturing twist drillsInfo
- Publication number
- GB633060A GB633060A GB2826845A GB2826845A GB633060A GB 633060 A GB633060 A GB 633060A GB 2826845 A GB2826845 A GB 2826845A GB 2826845 A GB2826845 A GB 2826845A GB 633060 A GB633060 A GB 633060A
- Authority
- GB
- United Kingdom
- Prior art keywords
- work
- housing
- stock
- pair
- drill
- 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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
633,060. Making twist drills. DELANEY, H. W. Oct. 26, 1945, No. 28268. [Classes 83 (ii), 83 (iii) and 83 (iv)] Rolling helical grooves; twisting; working at specified temperatures.-In a method of manufacturing twist drills, stock of multiple drill length is heated and fluted with beads formed along alternate edges of said flutes, thereafter the fluted stock is twisted into drill form. Drills are then finished by cutting to length, grinding and pointing. The stock smaller in cross-section than the finished drill is raised to a temperature between 1800‹ and 2100‹ F. and flattened between a pair of rolls 9, 11, Fig. 2, one, 9, of which has flanges 10 in which the rim of the coacting roll locates. The flattened stock emerges at the correct angle for entry to a pair of rough fluting rollers 12, 13, Fig. 3, relatively adjustable in a horizontal or vertical plane, and is then finished by a further pair of rolls, identical in form, but arranged in closer relation to one another in order further to impress the flutes and the beads. The various roll pairs are mounted in separate housings slidably mounted on ways on a base so that varying lengths of stock can be rolled by altering the relative positions of the housings. The work is then subjected to an air stream to equalize the temperature throughout its length and is twisted in a machine having a pair of relatively adjustable twisting heads 22, Fig. 10, slidable on a base 23. The heads comprise a housing 34, Fig. 14, with a member 43, slidably mounted on two bars 44 extending from the housing. Springs 48 are interposed between the housing and member 43. Secured to member 43 is a self-locking and unlocking driver having an inner member 39 secured to the member 43 by a split ring 40 and a brake lining 41. The outer body 38 has a hollow shaft 37 integral therewith which is splined on its outer surface and enters above in housing 34 where the splines engage in a gear 35. The work is received in the hollow shaft 37 and is driven by pins 47 pivoted on fingers 45, Fig. 16, whose ends engage recesses 46 in the body 38, when the latter is rotated in the direction of the arrow, and move the pins apart to free the work. Opposite rotation of the body causes the fingers to pivot inwardly and close the pins to grip the work. The direction of rotation of the outer chuck housing is transmitted through the gears 35 by splined shafts 26, 27, Fig. 10, which are oppositely rotated through further gears by racks 24, 25, carried by a cross-head 20, on the piston of a hydraulic cylinder 21. Limit switches 28a, 29a are provided to stop the movement of the head when engaged by the adjustable stops 30<SP>1</SP> or 31<SP>1</SP>, and a scale 32 and pointer 33 indicate the degree of twist imparted to the work 5, which shortens on twisting and automatically moves members 43 inwards against the action of springs 48. The rotation of the head is then reversed allowing springs 48 to return members 43 to their normal position and fingers 45 to free the work. In the next stage the outer diameter of the work is trued by rolling between platens 50, 51, Figs. 18 and 19, supported in a rectangular housing 52 and having bevelled edges 58 to ensure smooth engagement of the drill bit 5. The platen 50 is cut away at 57 to release the work which falls on to an indirect delivery track 55. The platen 50 is adjusted by means of screwoperated wedges 60 acting in conjunction with bolt 63 and spring 62. The rolling deforms the lands at 65, Fig. 22, so that when the metal indicated by the unhatched portion of the Figure is ground away after heat treatment, a hard and sharp edge 66 is produced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2826845A GB633060A (en) | 1945-10-26 | 1945-10-26 | Method and apparatus for manufacturing twist drills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2826845A GB633060A (en) | 1945-10-26 | 1945-10-26 | Method and apparatus for manufacturing twist drills |
Publications (1)
Publication Number | Publication Date |
---|---|
GB633060A true GB633060A (en) | 1949-12-12 |
Family
ID=10272958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2826845A Expired GB633060A (en) | 1945-10-26 | 1945-10-26 | Method and apparatus for manufacturing twist drills |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB633060A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE934214C (en) * | 1952-01-30 | 1955-10-13 | Italiana Di Posateria E Oggett | Rolling device for pinching incisions in square metal bars |
-
1945
- 1945-10-26 GB GB2826845A patent/GB633060A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE934214C (en) * | 1952-01-30 | 1955-10-13 | Italiana Di Posateria E Oggett | Rolling device for pinching incisions in square metal bars |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2720801A (en) | Rolling head | |
CN103909390A (en) | Method for fabricating wind-driven generator gear | |
US2457132A (en) | Method of manufacturing twist drills | |
CN107984180A (en) | A kind of splined driveshaft axis fine-processing technique | |
CN107584351A (en) | A kind of plank polishing punching all-in-one | |
US3803890A (en) | Rolling machines | |
Lis et al. | Numerical analysis of a skew rolling process for producing a crankshaft preform | |
US1828464A (en) | Roller spun metal manufacture | |
US2533227A (en) | Apparatus for the manufacture of twist drills | |
CN208991761U (en) | Roller machine tool | |
CN104999103A (en) | Power chuck | |
GB633060A (en) | Method and apparatus for manufacturing twist drills | |
CN205702540U (en) | A kind of universal-joint-pin type universal automatic drilling device of turning | |
US3379047A (en) | Forging process and machine | |
US2512484A (en) | Method of forging railway axles | |
CN108246938A (en) | A kind of continuity flatly moving type rolling press and its pressure rolling method | |
US2410355A (en) | Severing tool | |
US2336726A (en) | Saw swage and shaper | |
CN205851947U (en) | A kind of processing unit (plant) of netted concave roll | |
CN203235770U (en) | Blank forming machine for inner-cooling type spiral bit | |
US1068236A (en) | Method of manufacturing by forging or matricing circular pieces of work with a profiled periphery. | |
US2405159A (en) | Method and machine for finishing the teeth of gear shaving cutters and the like | |
US2659277A (en) | Machine for cutting or finishing gear teeth and analogous formations | |
US273322A (en) | Manufacture of twist-drills | |
GB830500A (en) | Method and apparatus for forming the internal surface of a tubular workpiece to a predetermined shape |