GB549045A - Improvements in or relating to copying lathes - Google Patents
Improvements in or relating to copying lathesInfo
- Publication number
- GB549045A GB549045A GB431941A GB431941A GB549045A GB 549045 A GB549045 A GB 549045A GB 431941 A GB431941 A GB 431941A GB 431941 A GB431941 A GB 431941A GB 549045 A GB549045 A GB 549045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cam
- tool
- blade
- spindle
- shaft
- 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
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
- B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
- B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2735/00—Control systems or devices for copying from a pattern or master model
- B23Q2735/02—Means for transforming movement of the feeler into feed movement of tool or work
- B23Q2735/025—Means for transforming movement of the feeler into feed movement of tool or work in a lathe
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
549,045. Cutting - screw propellers. BRITISH POWER BOAT CO., Ltd., and BRADBURY, W. P. March 31, 1941, No. 4319. [Class 83 (iii)] In a machine for cutting screw propellers the propeller 67 is mounted on a rotatable work holder with its axis, Fig. 1, at an angle to the axis of rotation so as to reduce the inclination to the face plate of the blade being machined, the tool having a controlled movement axially of the work holder so as to make a series of cuts across a blade face. The bed 10 supports a headstock spindle carrying a face plate 15 from which an arbor 16 projects at an angle of about 15 degrees to the spindle axis. The spindle is oscillated during operation through the angle required to generate one blade, the amplitude being controlled by dogs 39 on the face plate coacting with the reversing switch 38 of the driving motor. The spindle is connected by gearing 14 to a longitudinal shaft 18. A slide rest mounted on the bed comprises a bottom cross-slide 19 carrying a longitudinal tool slide 21 carrying the tool holder 22. This slide is operated by a compound cam 24 arranged on a transverse axis and driven by gearing 60 and bevel gearing 29 from the shaft 18, this gearing including a two-part gear 28, the parts of which are relatively adjustable to control backlash. The cam shaft is thus driven, for a three-bladed propeller, at three times the spindle speed. During a forward oscillation of the work the required axial copying movement is imparted to the tool by the cam 24 which is returned during the backward movement. A pinion 38 on the cam-shaft acts through a quadrant 54 to operate pawl-and-ratchet mechanism driving the cross feed-screw 44 to impart radial feed to the tool and to bring the roller on to a different part of the cam. The arbor has three keyways at 120 degrees for positioning successive blades. The tool may be inclined for cutting propellers with wide blades. The tool may be replaced by a milling-cutter driven by a motor on the tool-holder. The cam may be machined from a master blade by interchanging the positions of the tool and follower. In a modification, the compound cam may be replaced by a large cam having a number of pairs of cam surfaces 46, Fig. 6, each pair corresponding to one cut across a blade face, the face being finished after one revolution of the cam shaft. The movements of cam roller 47 are transmitted to the tool by lever mechanism. The shapes of the cams are preferably determined by setting up a master blade and scribing lines on cam blanks by a scriber fitted in place of the cam follower.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431941A GB549045A (en) | 1941-03-31 | 1941-03-31 | Improvements in or relating to copying lathes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431941A GB549045A (en) | 1941-03-31 | 1941-03-31 | Improvements in or relating to copying lathes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB549045A true GB549045A (en) | 1942-11-04 |
Family
ID=9774931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB431941A Expired GB549045A (en) | 1941-03-31 | 1941-03-31 | Improvements in or relating to copying lathes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB549045A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2524091A (en) * | 1944-01-29 | 1950-10-03 | Zimmermann Max Kurt Von | Universal screw propeller generator |
GB2233261A (en) * | 1989-06-20 | 1991-01-09 | Refurbished Turbine Components | Apparatus for use in repairing turbine rotors. |
-
1941
- 1941-03-31 GB GB431941A patent/GB549045A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2524091A (en) * | 1944-01-29 | 1950-10-03 | Zimmermann Max Kurt Von | Universal screw propeller generator |
GB2233261A (en) * | 1989-06-20 | 1991-01-09 | Refurbished Turbine Components | Apparatus for use in repairing turbine rotors. |
GB2233261B (en) * | 1989-06-20 | 1993-01-06 | Refurbished Turbine Components | Apparatus for use in the repair of machines |
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