US1729300A - Method of forming cams - Google Patents
Method of forming cams Download PDFInfo
- Publication number
- US1729300A US1729300A US728508A US72850824A US1729300A US 1729300 A US1729300 A US 1729300A US 728508 A US728508 A US 728508A US 72850824 A US72850824 A US 72850824A US 1729300 A US1729300 A US 1729300A
- Authority
- US
- United States
- Prior art keywords
- cup
- flange
- cam
- edge
- die
- 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
- 238000000034 method Methods 0.000 title description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 208000013641 Cerebrofacial arteriovenous metameric syndrome Diseases 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F15/00—Methods or machines for making gear wheels of special kinds not covered by groups B23F7/00 - B23F13/00
- B23F15/02—Making gear teeth on wheels of varying radius of operation, e.g. on elliptical wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49462—Gear making
- Y10T29/49467—Gear shaping
- Y10T29/49476—Gear tooth cutting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
Definitions
- cams which are driven by engagement with a rubber-covered roller and 5 which have to be started, rotated and stopped in very short intervals of time.
- suc camsof sheet-metal For the sake of lightness and of economy in manufacture, it is desirable to make suc camsof sheet-metal, and they may be drawn .0 in cup-like form, comprising a web or body surrounded by a flange which provides the working-face of the cam.
- the present method comprises a series of operations by which a cam is made of sheetmetal with a serrated working-face of a 15 width equal to the full width of the flange, and with the edge of the flange accurately formed and finished, including one or more of the stop-lugs or the like which may project integrally from the flange.
- Fig. 1 is a sideelevation of a cam formed in accordance with the novel method
- Fig. 2 is a section on the line 2-2 in Fig. 1
- Fig. 3 is an outline View of the sheet-metal blank from which the cam is drawn
- Fig. 4 shows the sheetmetal cup in section, after the drawing operation
- Fig. 5 is a sectional view showing the final upsetting operation on the flange
- Fig. 6 is a side-elevation-of the punch by which the u setting operation is performed.
- a form 0 cam which may be made by the present method is shown, in Figs. 1 and 2,
- the flange has two convex serrated portions 12 constituting the working faces of the cam.
- Two stop-lugs 13 project integrally from the edge of the flange 11.
- the web is shown as somewhat cut away for the sake of lightness, but this is of no consequence in connection with the present Invention.
- a suitable blank 14 of sheet-metal is first punched, this blank being provided with two projections 15 to furnish the material for the stop-lugs.
- the blank is then drawn into the form of a shallow cup, of the required outline, as shown in Fig. 4.
- the web and the flange are formed, but they are united by a smooth curved ortion of the sheet-metal, as it is impracticable to form a sharp angle at this point in the operation of drawing the sheetmetal.
- the flange of the cup, as drawn, is of irregular width, the irregularities being such as have been found, by experiment, to be necessary to provide the stock necessary, at different points, to complete the cam in the final pressing operation.
- the next operation consists in subjecting the cup to an edgewise pressure applied to the flange while the cup is supported in a suitable die 16.
- the punch 17 used for this purpose has a projection 18 which fits closely against the inner surface of the flange, and a shoulder 19 which rests against the edge of the flange, the shoulder being recessed at 20 to receive and form the lug or lugs 13.
- the die 16 fits closely against the out-er surface of the flange, and is formed with a sharp right-angle between its sides and bottom.
- the final operation of the present method consists in cutting the teeth across the flange, which may be done by milling, broaching or in any convenient way.
- a non-circular cam which consists in drawing, from sheetmetal, a cup of the required outline having an irregular edge, confining the cup Within a die of the same outline and of greater depth than the cup, with a sharp an le between the bottom and the sides, and subJecting the cup, within the die, to pressure from a punch which fits closely the inner surfaces of the cup and of the die cavity, With a shoulder of the form required for the edge of the cam, whereby the metal of the cup is flowed into the lower angle of the die and also against said shoulder, thus forming, at one operation, a finished edge and a sharp lower angle on the cup.
Description
Sept. 24, 1929. F. TERBUSH METHOD OF FORMING CAMS Original Filed July 26, 1924 Eng. 6.
Patented Sept. 24, 1929 UNITED STATES PATENT OFFICE FLOYD TERBUSH, OF ROCHESTER, NEW YORK, ASSIGNOR TO NORTH EAST ELECTRIC COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK METHOD OF FORMING CAMS Application filed July 26, 1924, Serial No. 728,508. Renewed February 28, 1929.
In certain power-mechanisms, for use in.
actuatin' typewriters and the like, it has been proposed to use cams which are driven by engagement with a rubber-covered roller and 5 which have to be started, rotated and stopped in very short intervals of time.
For the sake of lightness and of economy in manufacture, it is desirable to make suc camsof sheet-metal, and they may be drawn .0 in cup-like form, comprising a web or body surrounded by a flange which provides the working-face of the cam. A further important requisite, however, is that the maximum possible width of working-face be given to .5 the cam, since this width will, In any case, be small owing to the limitations of space within the machine. To this end it is desirable that the web and the flange be joined at a sharper or more nearly exact right angle than can be produced in an ordinary drawing operation.
The present method comprises a series of operations by which a cam is made of sheetmetal with a serrated working-face of a 15 width equal to the full width of the flange, and with the edge of the flange accurately formed and finished, including one or more of the stop-lugs or the like which may project integrally from the flange.
0 The invention is illustrated in the accompanying drawings, in which Fig. 1 is a sideelevation of a cam formed in accordance with the novel method; Fig. 2 is a section on the line 2-2 in Fig. 1; Fig. 3 is an outline View of the sheet-metal blank from which the cam is drawn; Fig. 4 shows the sheetmetal cup in section, after the drawing operation; Fig. 5 is a sectional view showing the final upsetting operation on the flange; and
Fig. 6 is a side-elevation-of the punch by which the u setting operation is performed. A form 0 cam which may be made by the present method is shown, in Figs. 1 and 2,
as comprising a web-portion 10 and a periph- 5 eral flange 11. The flange has two convex serrated portions 12 constituting the working faces of the cam. Two stop-lugs 13 project integrally from the edge of the flange 11. The web is shown as somewhat cut away for the sake of lightness, but this is of no consequence in connection with the present Invention.
In forming a cam like that of Figs. 1 and 2 by the present method, a suitable blank 14 of sheet-metal is first punched, this blank being provided with two projections 15 to furnish the material for the stop-lugs. The blank is then drawn into the form of a shallow cup, of the required outline, as shown in Fig. 4. In this operation the web and the flange are formed, but they are united by a smooth curved ortion of the sheet-metal, as it is impracticable to form a sharp angle at this point in the operation of drawing the sheetmetal.
The flange of the cup, as drawn, is of irregular width, the irregularities being such as have been found, by experiment, to be necessary to provide the stock necessary, at different points, to complete the cam in the final pressing operation.
The next operation consists in subjecting the cup to an edgewise pressure applied to the flange while the cup is supported in a suitable die 16. The punch 17 used for this purpose has a projection 18 which fits closely against the inner surface of the flange, and a shoulder 19 which rests against the edge of the flange, the shoulder being recessed at 20 to receive and form the lug or lugs 13. The die 16 fits closely against the out-er surface of the flange, and is formed with a sharp right-angle between its sides and bottom.
When the cup is pressed between these tools the curved metal between the flange and the bottom is forced down into the angle of the die so as to assume the form shown in Fig. 6. At the same time the lugs 13 and the edge of the flange are accurately formed by the pressure.
The final operation of the present method consists in cutting the teeth across the flange, which may be done by milling, broaching or in any convenient way.
The invention claimed is:
1. The method of making a cam which con sists in drawing a cup of sheetanetal with a lug on the edge thereof subjecting the cup to, edgewise pressure, by a'punchconforming to the edge of the cup including the lug thereon,
within a die having a sharp angle between the bottom and the sides whereby the sheet-metal is forced into said angle and given. a sharp right-angular form between the web and the flange of the cam; and thereafter cutting teeth across the flange of the cam.
2. The method of making a non-circular cam, which consists in drawing, from sheetmetal, a cup of the required outline having an irregular edge, confining the cup Within a die of the same outline and of greater depth than the cup, with a sharp an le between the bottom and the sides, and subJecting the cup, within the die, to pressure from a punch which fits closely the inner surfaces of the cup and of the die cavity, With a shoulder of the form required for the edge of the cam, whereby the metal of the cup is flowed into the lower angle of the die and also against said shoulder, thus forming, at one operation, a finished edge and a sharp lower angle on the cup.
3. The method of making a non-circular cam, which consists in cutting a non-circular blankwith :1 lug projecting from the edge thereof, drawing the blank into a non-circular cup with the lu; projecting from and in the plane of the side wall thereof, confining the cup within a die of the same outline and of greater depth than the cup, with a sharp angle between the bottom and the sides, and
subjecting the cup, Within the die, to pressure from a punch which fits closely the inner surfares of the cup and of the die cavity and has a shoulder, for forming the edge of the cam. provided with a recess to receive and form the lug, whereby in a single operation the metal of the cup is flowed into the lower angle of the die and a finished form is given to the edge and the lug.
' FLOYD TERBUSH.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US728508A US1729300A (en) | 1924-07-26 | 1924-07-26 | Method of forming cams |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US728508A US1729300A (en) | 1924-07-26 | 1924-07-26 | Method of forming cams |
Publications (1)
Publication Number | Publication Date |
---|---|
US1729300A true US1729300A (en) | 1929-09-24 |
Family
ID=24927136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US728508A Expired - Lifetime US1729300A (en) | 1924-07-26 | 1924-07-26 | Method of forming cams |
Country Status (1)
Country | Link |
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US (1) | US1729300A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2654944A (en) * | 1950-04-10 | 1953-10-13 | Universal Railway Devices Co | Method of making gears |
US3237287A (en) * | 1962-01-30 | 1966-03-01 | Royal Typewriter Co Inc | Method for producing gears |
US7175009B2 (en) | 2004-07-20 | 2007-02-13 | Bendix Spicer Foundation Brake Llc | Cam actuated drum brake |
-
1924
- 1924-07-26 US US728508A patent/US1729300A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2654944A (en) * | 1950-04-10 | 1953-10-13 | Universal Railway Devices Co | Method of making gears |
US3237287A (en) * | 1962-01-30 | 1966-03-01 | Royal Typewriter Co Inc | Method for producing gears |
US7175009B2 (en) | 2004-07-20 | 2007-02-13 | Bendix Spicer Foundation Brake Llc | Cam actuated drum brake |
US20070131502A1 (en) * | 2004-07-20 | 2007-06-14 | Clark James R | Cam actuated drum brake |
US7543692B2 (en) | 2004-07-20 | 2009-06-09 | Bendix Spicer Foundation Brake Llc | Cam actuated drum brake |
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