US2576709A - Thread-rolling appliance - Google Patents
Thread-rolling appliance Download PDFInfo
- Publication number
- US2576709A US2576709A US793593A US79359347A US2576709A US 2576709 A US2576709 A US 2576709A US 793593 A US793593 A US 793593A US 79359347 A US79359347 A US 79359347A US 2576709 A US2576709 A US 2576709A
- Authority
- US
- United States
- Prior art keywords
- thread
- work
- rolls
- piece
- rolling
- 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 - Lifetime
Links
- 238000005096 rolling process Methods 0.000 title description 9
- 239000011295 pitch Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
- B21H3/042—Thread-rolling heads
- B21H3/048—Thread-rolling heads working tangentially
Definitions
- the invention has reference to thread-rolling appliances of the kind typified by those described in British Patent No. 499,277, comprising a pair of free and independent screw-threaded rolls rotatably mounted on a carrier which is adapted to be moved laterally towards a revolving work-piece to cause the latter to be engaged between and to rotate said rolls, resulting in the formation of a continuous screw-thread upon the workpiece.
- the object of the invention is to provide an appliance, of the aforesaid kind, which can be employed for the simultaneous production of a rolled thread upon each of two parts of a work-piece which are of different diameters.
- the thread-forming surfaces of the two rolls are oiT-set one in relation to the other, to an extent equal to the axial distance between the parts of the work-piece which are to be threaded, the arrangement being such that when engaged with the work-piece each roll produces a thread upon one of the parts thereof, the pressures of the rolls balancing one another on opposite sides of the work-piece.
- the invention is primarily applicable to threadrolling tools for use on work where the diierence in diameter of the two parts to be threaded simultaneously is small in comparison with the diameter of those parts.
- Figs. l and 2 show respectively a side elevation and a front elevation of the tool
- Fig. 3 shows a section on the line III-III in Fig. 2;
- Fig. 4 shows a section on the line IV-IV in Fig. 1.
- the tool comprises a carrier formed by a substantially rectangular block I0, a two-jawed bracket II pivoted to the carrier block I on a pin I3, and a pair of thread-forming rolls I2, I2 rotatably mounted in the jaws of the bracket II.
- the rolls I2 are xed on spindles I4 free to rotate in bearings in the jaws of the bracket I I, which are each bifurcated to accommodate the rolls.
- the two thread-forming rolls I2, I2 are thus adapted, when -the tool is moved laterally to engage a revolving work-piece, to roll a continuous thread on each of two axially separated but coaxial parts of the work-piece, each roll being effective to roll the thread on one of the two parts.
- each of the two thread-forming rolls I2, I2 is selected in accordance with the diameter of that part of the work-piece on which that roll is intended to form a thread, as with a normal thread-rolling tool, and it will be obvious that the diameters of the parts of the work-piece which are to be threaded may be either the same or different. If desired different forms of thread, or diierent pitches of thread, may be applied to the said parts of the work-piece.
- a small degree of axial play is permitted both to the bracket II along its pivot pin I3, and to the spindles Ill carrying the threaded rolls I2.
- a helical spring I5 is provided for taking up the play of the bracket II and returning the bracket to the same axial position whenever the appliance is withdrawn out of engagement with the work-piece, while leaf springs IB have a similar function with respect to the threaded rolls I2.
- the invention is effective in bringing about a substantial saving in time and cost by permitting the performance in one operation of work what has heretofore required two such operations.
- a thread-rolling appliance comprising supporting means, and two rolls journalled in said supporting means for free rotation about parallel axes, said rolls being spaced apart to permit a Work-piece to be engaged therebetween by lateral movement, each of said rolls having a thread-forming surface, the thread-forming surfaces of the respective rolls having different diameters and being axially olset to an extent to a tool support, a two-jawed bracket pivotally 5 mounted on the carrier, the thread-forming rolls being journalled oney in each jaw of the bracket;
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
NOV- 27, 1951 T. K. AFFLECK I THREAD-ROLLING APPLIANCE 2 SHEETS-SHEET l Filed Dec. 24, 19,47
a D raaunwlluunlhurlnl NOV. 27, 1951 T K, AFFLECK 2,576,709
THREAD-ROLLING APPLANCE Filed DBC. 24, 1947 2 SHEETS--SHEET 2 rNveN'l-ale E., wmmmv www Patented Nov. 27, -1951 THREAD .--ROI'ILING APPLIANCE Theodore King Affleck, London, England, as-
signor to Acton Bolt Limited, London, England, a company of Great Britain Application December 24, 1947, Serial No. 793,593 In Great Britain January 3, 1947 2 Claims. (Cl. 80-6) The invention has reference to thread-rolling appliances of the kind typified by those described in British Patent No. 499,277, comprising a pair of free and independent screw-threaded rolls rotatably mounted on a carrier which is adapted to be moved laterally towards a revolving work-piece to cause the latter to be engaged between and to rotate said rolls, resulting in the formation of a continuous screw-thread upon the workpiece. The object of the invention is to provide an appliance, of the aforesaid kind, which can be employed for the simultaneous production of a rolled thread upon each of two parts of a work-piece which are of different diameters.
In a thread-rolling appliance in accordance with the invention, the thread-forming surfaces of the two rolls are oiT-set one in relation to the other, to an extent equal to the axial distance between the parts of the work-piece which are to be threaded, the arrangement being such that when engaged with the work-piece each roll produces a thread upon one of the parts thereof, the pressures of the rolls balancing one another on opposite sides of the work-piece.
The invention is primarily applicable to threadrolling tools for use on work where the diierence in diameter of the two parts to be threaded simultaneously is small in comparison with the diameter of those parts.
A specic embodiment of the invention adapted for mounting on the saddle of a lathe, is illustrated by the accompanying drawings, of which:
Figs. l and 2 show respectively a side elevation and a front elevation of the tool;
Fig. 3 shows a section on the line III-III in Fig. 2; and
Fig. 4 shows a section on the line IV-IV in Fig. 1.
The tool comprises a carrier formed by a substantially rectangular block I0, a two-jawed bracket II pivoted to the carrier block I on a pin I3, and a pair of thread-forming rolls I2, I2 rotatably mounted in the jaws of the bracket II. The rolls I2 are xed on spindles I4 free to rotate in bearings in the jaws of the bracket I I, which are each bifurcated to accommodate the rolls.
It will be seen from Fig. 2 that the two rolls I2, I2 are not mounted with their thread-forming surfaces opposite one another, as in a normal thread-rolling appliance, but that they are instead mounted with their thread-rolling surfaces axially offset from one another in accordance with the axial distance between the two parts of the work-piece to be threaded simultaneously.
The two thread-forming rolls I2, I2 are thus adapted, when -the tool is moved laterally to engage a revolving work-piece, to roll a continuous thread on each of two axially separated but coaxial parts of the work-piece, each roll being effective to roll the thread on one of the two parts.
It will be understood that, in order that the radial pressures exerted on the revolving workpiece by the opposite rolls may balance each other without applying excessive torque to the work-piece or to the tool-holder, it is desirable that the parts of the work-piece on which threads are to be rolled should be separated by the minimum axial distance.
The diameter and thread-pitch of each of the two thread-forming rolls I2, I2 is selected in accordance with the diameter of that part of the work-piece on which that roll is intended to form a thread, as with a normal thread-rolling tool, and it will be obvious that the diameters of the parts of the work-piece which are to be threaded may be either the same or different. If desired different forms of thread, or diierent pitches of thread, may be applied to the said parts of the work-piece.
A small degree of axial play is permitted both to the bracket II along its pivot pin I3, and to the spindles Ill carrying the threaded rolls I2. A helical spring I5 is provided for taking up the play of the bracket II and returning the bracket to the same axial position whenever the appliance is withdrawn out of engagement with the work-piece, while leaf springs IB have a similar function with respect to the threaded rolls I2.
It will be understood that, for those classes of work which require to have threads formed thereon in accordance with the conditions specified, the invention is effective in bringing about a substantial saving in time and cost by permitting the performance in one operation of work what has heretofore required two such operations.
What I claim as my invention and desire to secure by Letters Patent is:
1. A thread-rolling appliance comprising supporting means, and two rolls journalled in said supporting means for free rotation about parallel axes, said rolls being spaced apart to permit a Work-piece to be engaged therebetween by lateral movement, each of said rolls having a thread-forming surface, the thread-forming surfaces of the respective rolls having different diameters and being axially olset to an extent to a tool support, a two-jawed bracket pivotally 5 mounted on the carrier, the thread-forming rolls being journalled oney in each jaw of the bracket;
THEoDoRE KING AFFLECK.
REFERENCES CITED The following references are of record in the le of this patent:
Number Number UNITED STATES PATENTS Name Date Gould J JunellI 1940 Plagemannet a1. Feb. 29, 1944 FOREIGN PATENTS Country Date Great Britain Jan. 25, 1892
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2576709X | 1947-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2576709A true US2576709A (en) | 1951-11-27 |
Family
ID=10910562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US793593A Expired - Lifetime US2576709A (en) | 1947-01-03 | 1947-12-24 | Thread-rolling appliance |
Country Status (1)
Country | Link |
---|---|
US (1) | US2576709A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699077A (en) * | 1950-11-20 | 1955-01-11 | Emma G Bedker | Method of rolling threads on thread forming tools |
US2771799A (en) * | 1953-12-28 | 1956-11-27 | James W Batchelder | Thread rolling tool |
DE3300029A1 (en) * | 1983-01-03 | 1984-07-05 | Wilhelm Fette Gmbh, 2053 Schwarzenbek | METHOD FOR PRODUCING THREADS AND DEVICE FOR CARRYING OUT THE METHOD |
US4924687A (en) * | 1989-10-16 | 1990-05-15 | C. J. Winter Machine Works, Inc. | Quick release thread roll support |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2204182A (en) * | 1939-05-25 | 1940-06-11 | Wolseley Motors Ltd | Appliance for rolling screw threads |
US2342817A (en) * | 1939-03-02 | 1944-02-29 | Plagemann Werner | Screw-threading machine |
-
1947
- 1947-12-24 US US793593A patent/US2576709A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2342817A (en) * | 1939-03-02 | 1944-02-29 | Plagemann Werner | Screw-threading machine |
US2204182A (en) * | 1939-05-25 | 1940-06-11 | Wolseley Motors Ltd | Appliance for rolling screw threads |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699077A (en) * | 1950-11-20 | 1955-01-11 | Emma G Bedker | Method of rolling threads on thread forming tools |
US2771799A (en) * | 1953-12-28 | 1956-11-27 | James W Batchelder | Thread rolling tool |
DE3300029A1 (en) * | 1983-01-03 | 1984-07-05 | Wilhelm Fette Gmbh, 2053 Schwarzenbek | METHOD FOR PRODUCING THREADS AND DEVICE FOR CARRYING OUT THE METHOD |
US4592221A (en) * | 1983-01-03 | 1986-06-03 | Wilhelm Fette Gmbh | Method of and an arrangement for producing threads |
US4924687A (en) * | 1989-10-16 | 1990-05-15 | C. J. Winter Machine Works, Inc. | Quick release thread roll support |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2883198A (en) | Work driver for the metal cutting machine | |
US2784977A (en) | Multiple jaw chuck with counterbalanced jaws | |
US2576709A (en) | Thread-rolling appliance | |
US2204182A (en) | Appliance for rolling screw threads | |
US2550855A (en) | Thread rolling apparatus | |
US2645953A (en) | Knurling and burnishing tool holder | |
US2487994A (en) | Lathe or other turning machines | |
US2355132A (en) | Thread-rolling tool or appliance | |
US2775461A (en) | Chuck | |
US3088746A (en) | Radially adjustable chuck | |
US2218574A (en) | Appliance for rolling screw threads | |
CN209272975U (en) | A kind of fixed device of roll | |
US2311211A (en) | Turning attachment | |
US3157408A (en) | Chuck construction | |
US2141466A (en) | Method of machining crankshafts | |
US3504514A (en) | Roller burnishing tool | |
US637320A (en) | Machine for nurling metal. | |
US3538731A (en) | Knurling tool | |
US2233310A (en) | Crankshaft chuck | |
US2089421A (en) | Tool holder for lathes | |
US2370351A (en) | Clamping fixture | |
US2974550A (en) | Thread rolling apparatus | |
US2202044A (en) | Method of and apparatus for manufacturing lock nuts | |
US2127792A (en) | Turning lathe | |
US1864046A (en) | Work support for machine tools |