US2339959A - Shell drawing press - Google Patents
Shell drawing press Download PDFInfo
- Publication number
- US2339959A US2339959A US451708A US45170842A US2339959A US 2339959 A US2339959 A US 2339959A US 451708 A US451708 A US 451708A US 45170842 A US45170842 A US 45170842A US 2339959 A US2339959 A US 2339959A
- Authority
- US
- United States
- Prior art keywords
- pushback
- cylinders
- draw
- main
- press
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/27—Carriages; Drives
- B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
Definitions
- This invention relates generally to presses and more particularly to shell drawing presses.
- I have'shown a pair of crossheads l and 2 connected by tie rods 3 and supporting, in longitudinally spaced relation, a main operating cylinder 4' and a pair of pushback cylinders 5 and B.
- a main ram 1 supports a draw mandrel I and also connected thereto are a pair of pushback rams 9 and Ill, these rams extending into cylinders 5 and 6.
- a series of successive reducling dies H to ll are connected to and specifically shown as supported upon the cylinders 5 and 6. the dies and cylinders being secured together in any suitable manner diagrammatically shown as collars I! and nuts It. Hydraulic pressure from any suitable source may be alternately supplied to the main cylinder 4 and push back cylinders 5 and 6 to move the mandrel in the direction of the pushback cylinders, preferably between the same.
- a shell blank is placed on'the end of the draw mandrel 8 and pushed successively through the dies I l to II and thereafter the mandrel is withdrawn by supplying fluid pressure to pushback ram 4.
- the functional character of elements 5 and 6 causes these elements to be of an extremely sturdy character thereby being conliucive to the strength necessary in performing connecting and die supporting functions.
- a draw press having longitudinally spaced main and pushback cylinders, means for connecting said cylinders together, a main operating ram in said main cylinder, a draw mandrel connected to said main ram and movable toward said pushback cylinders during a drawing operation, pushback rams for returning said main ram and mandrel, and draw dies connected solely to said pushback cylinders so that said pushback cylinders sustain the entire drawing load on the dies during the drawing operation.
- a draw press having a main cylinder and a plurality of pushback cylinders spaced transversely apart from each other and also spaced longitudinally from said main cylinder, means for connecting said pushback cylinders to said main cylder, a main operating ram in said main cylinder, a draw mandrel connected to said main ram and movable toward and between said pushback cylinders during a drawing operation, pushback rams for returning said main ram and mandrel, and a series of successive reducing draw die connected solely to said pushback cylinders between the same so that said pushback cylinders sustain the entire drawing load on the dies during the drawing operation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
, Patented Jan. 25, 1944 SHELL DRAWING PRESS Myer N. Stadlin, Philadelphia, Pa., assignor to The Baldwin Locomotive Works, a. corporation of Pennsylvania Application July 21, 1942, Serial 110.451.7021
2 Claims.
This invention relates generally to presses and more particularly to shell drawing presses.
It is customary in drawing shells to have a relatively long mandrel adapted to pass the shell casing through several stages of reduction in one continuous operation. Because of the number of successive die passes and the magnitude of the operating forces involved the press is usually formed of three crossheads connected together with two separate sets of tie rods of substantial size and strength and in addition thereto it has been heretofore necessary to suitably support the usual main operating cylinder and pushback cy inders, all of which has heretofore involved considerable complications and added appreciable cost to the equipment.
It is an object of my invention to provide an improved draw press that is adapted to reduce to a minimum the number of structural and operating elements, while still retaining all of the functions and advantages thereof, thereby to produce a draw press that is relatively compact and is simple and economical in construction, operation and maintenance. These advantages are of distinct value in equipment of this kind because of its extremely large size.
In accomplishing the foregoing as well as other obiects and advantages, I have provided a novel arrangement whereby certain members perform multiple functions of acting as pushback cylinders and of axially connecting a plurality of successive dies together as well as connecting the dies to the main cylinder so as to resist the drawing force of a shell while it passes through the successive reducing dies.
Other objects and advantages will be more apparent to those skilled in the art from the following description of the accompanying drawing in which the figure is a diagrammatic sectional view of my improved press.
In the particular diagrammatic embodiment of the invention. I have'shown a pair of crossheads l and 2 connected by tie rods 3 and supporting, in longitudinally spaced relation, a main operating cylinder 4' and a pair of pushback cylinders 5 and B. A main ram 1 supports a draw mandrel I and also connected thereto are a pair of pushback rams 9 and Ill, these rams extending into cylinders 5 and 6. A series of successive reducling dies H to ll are connected to and specifically shown as supported upon the cylinders 5 and 6. the dies and cylinders being secured together in any suitable manner diagrammatically shown as collars I! and nuts It. Hydraulic pressure from any suitable source may be alternately supplied to the main cylinder 4 and push back cylinders 5 and 6 to move the mandrel in the direction of the pushback cylinders, preferably between the same.
In operation, a shell blank is placed on'the end of the draw mandrel 8 and pushed successively through the dies I l to II and thereafter the mandrel is withdrawn by supplying fluid pressure to pushback ram 4. The functional character of elements 5 and 6 causes these elements to be of an extremely sturdy character thereby being conliucive to the strength necessary in performing connecting and die supporting functions.
From the foregoing disclosure, it is seen that my improved press with its multiple functional aspect of certain elements provides a high degree of simplicity as well as sturdiness without in any way jeopardizing the effectiveness of the press or of impairing its drawing operations. In fact, the advantages of prior art draw presses have been fully maintained while at the same time eliminatlng many of the disadvantages thereof.
It will of course be understood that various changes in details of construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as set forth in the appended claims.
I claim:
l. A draw press having longitudinally spaced main and pushback cylinders, means for connecting said cylinders together, a main operating ram in said main cylinder, a draw mandrel connected to said main ram and movable toward said pushback cylinders during a drawing operation, pushback rams for returning said main ram and mandrel, and draw dies connected solely to said pushback cylinders so that said pushback cylinders sustain the entire drawing load on the dies during the drawing operation.
2. A draw press having a main cylinder and a plurality of pushback cylinders spaced transversely apart from each other and also spaced longitudinally from said main cylinder, means for connecting said pushback cylinders to said main cylder, a main operating ram in said main cylinder, a draw mandrel connected to said main ram and movable toward and between said pushback cylinders during a drawing operation, pushback rams for returning said main ram and mandrel, and a series of successive reducing draw die connected solely to said pushback cylinders between the same so that said pushback cylinders sustain the entire drawing load on the dies during the drawing operation.
- MYER N. STADLIN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US451708A US2339959A (en) | 1942-07-21 | 1942-07-21 | Shell drawing press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US451708A US2339959A (en) | 1942-07-21 | 1942-07-21 | Shell drawing press |
Publications (1)
Publication Number | Publication Date |
---|---|
US2339959A true US2339959A (en) | 1944-01-25 |
Family
ID=23793387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US451708A Expired - Lifetime US2339959A (en) | 1942-07-21 | 1942-07-21 | Shell drawing press |
Country Status (1)
Country | Link |
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US (1) | US2339959A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE951804C (en) * | 1952-04-24 | 1956-11-08 | Kieler Howaldtswerke Ag | Hydraulic piston drive for long-stroke machines, e.g. Push and pull bars |
US2809695A (en) * | 1949-11-08 | 1957-10-15 | F S Smithe Machine Co Inc | Die presses |
US2840884A (en) * | 1951-04-17 | 1958-07-01 | Biginelli Oreste | Apparatus for shaping tubular parts |
DE1051769B (en) * | 1956-07-13 | 1959-03-05 | Hydraulik Gmbh | Hydraulic pipe push bench |
US2894421A (en) * | 1956-01-12 | 1959-07-14 | Gerhard H Appel | Apparatus for straightening and for relieving stresses in workpieces |
US3266283A (en) * | 1963-06-25 | 1966-08-16 | Mckay Machine Co | Drawbench apparatus |
US3674987A (en) * | 1971-06-16 | 1972-07-04 | Nunzio P Addabbo | Aircraft navigational calculator |
DE3112140A1 (en) * | 1981-03-27 | 1982-10-07 | Bültmann KG, 5982 Neuenrade | Drawing machine for tubes and bars |
US4643017A (en) * | 1984-03-19 | 1987-02-17 | Nelson Richard E | Press having novel guide bars |
-
1942
- 1942-07-21 US US451708A patent/US2339959A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2809695A (en) * | 1949-11-08 | 1957-10-15 | F S Smithe Machine Co Inc | Die presses |
US2840884A (en) * | 1951-04-17 | 1958-07-01 | Biginelli Oreste | Apparatus for shaping tubular parts |
DE951804C (en) * | 1952-04-24 | 1956-11-08 | Kieler Howaldtswerke Ag | Hydraulic piston drive for long-stroke machines, e.g. Push and pull bars |
US2894421A (en) * | 1956-01-12 | 1959-07-14 | Gerhard H Appel | Apparatus for straightening and for relieving stresses in workpieces |
DE1051769B (en) * | 1956-07-13 | 1959-03-05 | Hydraulik Gmbh | Hydraulic pipe push bench |
US3266283A (en) * | 1963-06-25 | 1966-08-16 | Mckay Machine Co | Drawbench apparatus |
US3674987A (en) * | 1971-06-16 | 1972-07-04 | Nunzio P Addabbo | Aircraft navigational calculator |
DE3112140A1 (en) * | 1981-03-27 | 1982-10-07 | Bültmann KG, 5982 Neuenrade | Drawing machine for tubes and bars |
US4643017A (en) * | 1984-03-19 | 1987-02-17 | Nelson Richard E | Press having novel guide bars |
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