US3768296A - Method and apparatus for pressing and indenting a workpiece - Google Patents
Method and apparatus for pressing and indenting a workpiece Download PDFInfo
- Publication number
- US3768296A US3768296A US00288639A US3768296DA US3768296A US 3768296 A US3768296 A US 3768296A US 00288639 A US00288639 A US 00288639A US 3768296D A US3768296D A US 3768296DA US 3768296 A US3768296 A US 3768296A
- Authority
- US
- United States
- Prior art keywords
- tool
- press
- nosing
- punch
- workpiece
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/08—Accessory tools, e.g. knives; Mountings therefor
Definitions
- ABSTRACT The disclosure of this invention relates to a method and/or apparatus for performing in a prescribed operational sequence a pressing and a nosing operation on a workpiece, such as, a metallic slab.
- the pressing operation is accomplished by a movable platen and punch carried thereby; whereas, the nosing operation is accomplished by a nosing tool secured to the platen and movable therewith.
- a piston cylinder assembly moves the nosing tool in guides relative to the platen, in which behind the tool there is adapted to be selec tively inserted one or more filler pieces of varying thickness, the purpose of which is to be able to vary the penetration of the nosing tool in a manner that the working force of the nosing tool is transferred from the tool to the platen.
- SHEET 2 or 2 METHOD AND APPARATUS FOR PRESSING AND INDENTING A WORKPIECE In the formation of slabs out of the automotive scrap by a pressing or compacting operation preparatory to the hot rolling of the slabs by a rolling mill, it is desirable for at least certain sizes of the slabs to chamfer or taper the leading end so that the leading end of a slab will have a better opportunityto be unhesitatingly fed into the rolls of the mill.
- nosing or tapering of the front end is to be accomplished before the slabs are heated for hot rolling, that the nosing be accomplished by a separate operation distinct from the pressing operation. This, of course, appreciably adds to the expense not only of the equipment, but also of labor and plant space.
- an object of the present invention to provide a method and/or apparatus for performing an indenting of a pressed workpiece as an adjunct to the pressing operation.
- a further object of the present invention is to provide in combination with a press having a movable platen to which a punch is secured for reducing the thickness of a workpiece to a predetermined dimension a nosing mechanism secured to said platen, said nosing mechanism including a tool having a workpiece penetrating surface at its one end which is arranged to serve as an extension of the working surface of said punch, means for moving said tool from a position where its working surface is behind the working surface of said punch to a position where at least a portion of the working surface of said tool extends beyond said punch, said tool having a load transmitting surface at its end opposite its working surface, and one or more filler members arranged to be selectively moved into and out of a load transmitting relationship between themselves and said tool and said platen.
- FIG. 1 is an elevational schematic view of a press and a workpiece indenting mechanism of the present invention
- FIG. 2 is an enlarged view of a second position of the indenting mechanism shown in FIG. 1,
- FIG. 3 is an enlarged view of the details of the construction of the indenting mechanism shown in FIGS.
- the press includes two pairs of spaced upright tension members 10, two of which are only illustrated in FIG.
- FIG. 1 illustrates the platen 15 and punch 16 in their lowermost working positions and to the right, a portion of a pressed or compacted workpiece 20 which corresponds, it will be noted, in thickness to the illustrated opening between the elements 16 and 17.
- This mechanism in the illustrated form comprises a nosing tool 21 made in the form of a rectangular plate having a lower inclined working surface 22 mounted relative to the working surface of the punch 16 so that in its working position the working surface 22 extends below the working surface of the punch 16.
- the tool is restrained and guided vertically by end guides 23 secured to the adjacent vertical surfaces of the punch 16.
- the tool is held against the punch 16 by space bolts 24, the tool having slots 25 permitting relative movement between the punch and tool, but restrained from moving away from the punch by a cross bar 28 arranged inside the nuts 29 of the bolt 24.
- the tool is moved vertically by a centrally arranged piston cylinder assembly 31 also carried by the punch 16; the stroke of the cylinder being sufficient to, on the one hand, raise the lowest portion of the surface 22 behind the working surface of the punch 16 and, on the other hand, to lower the surface 22 below the working surface of the punch sufficient to allow the tool to take at least two different depths of penetration.
- a second part of the nosing tool consists of a mechanism for transferring the working load of the tool to the platen 15 and for varying the degree of penetration of the tool. This is accomplished by providingtwo independently slidable filler bars 33 and 34 which take the form of uniform thickness plates, but each of which has a different thickness.
- the plate 33 has a thickness of 2% inches; whereas, the plate 34 has a thickness of 2% inches which allows the tool to have a first step penetration of 4% inches and a second step of 2V2 inches.
- the plates themselves have flat contacting surfaces 36 that engage each other and, in addition, similar surfaces 37 and 38, respectively: the surface 37 contacting the top of the tool 21 and the surface 38 contacting the lower flat surface of the platen 15.
- the filler bars 33 and 34 are dovetailed at 41 and 42 in which the dovetail 41 allows the bar 33 to be supported by the platen 15 and the dovetail 42 allows the bar 34 to be supported by the bar 33.
- the dovetails as shown in FIG. 3, extend almost the entire distance of the bars, but terminate before reaching the area above the tool 21. The ends of the bars are further guided and restrained by L-shaped guide members 43, only one of which is shown at the right-hand of FIG. 4.
- a piston cylinder assembly 45 is connected and in a similar manner a piston cylinder assembly 46 is connected to the bar 34 for the purpose of moving the inner ends of the filler bars into and out of an overlapping position with respect to the top of the tool 21.
- a performed cold slab is brought to the press and arranged between the member 16 and 17, these elements, of course, being retracted from what is shown in FIG. 1. It will be appreciated that the workpiece is progressively compacted by it being sequentially fed to the press so that the punch 16 only compacts a small portion of the overall length of the slab at a time.
- the cylinder 31 will have been operated to retract the tool behind the working surface of the punch 16. This, of course, will mean that the cylinders 45 and 46 have retracted the tiller bars 33 and 34 to allow the tool 21 to be raised to its fullest extent.
- the slab Once the slab has been compacted by operation of the press it will be indexed to bring its leading end under the surface 22 of the tool 21. At this point the cylinder 31 will be operated to allow the tool to lower itself towards the slab. After this occurs, the cylinders 45 and 46 will be operated to bring the filler bars 33 and 34 into a position illustrated in FIG. 1.
- the press then will be operated to cause the platen 45 to lower, bringing the working surface 22 of the tool 21 into engagement with the workpiece to deform the workpiece 20, as illustrated in FIG. 1.
- the platen In order to perform the second step of the nosing operation, the platen is raised to its upper position and the cylinder46 is operated to remove the filler bar 34 from above the tool 21. In the meanwhile the slab will have been indented an amount to bring the next adjacent portion of the slab underneath the surface 22 of the tool 21. This leaves only the filler bar 33 above the tool.
- the press again is operated to cause the platen 15 to lower itself, again bringing the surface 22 of the tool 21 into engagement with the inner portion of overhung portion of the slab 20 to complete the nosing and to accomplish a condition illustrated, in phantom, in FIG. 2 relative to the slab.
- the tool 21 could be employed to perform other indentations of the slab at periodic points along its length.
- FIG. 5 illustrates an enlarged portion of the working surface 22 of the tool 21 in which to reduce the eccentric loading condition, it is formed in a number of equal steps 48.
- I claim 1 In combination with a press for compacting metal workpieces and the like having at least one movable platen for displacing a punch associated therewith,
- said indenting mechanism including a tool having a working surface arranged to serve as an extension of the working surface of said punch,
- said tool includes a load transferring surface on its end opposite its working surface
- said other means includes a bar means arranged to be moved into and out of engagement with the load transferring surface of said tool, and
- said bar means includes two separate rectangularly shaped plates, each having flat surfaces for engaging each other,
- said means for moving said bar means includes separate piston cylinder assemblies connected to and for independently moving said plates into and out of a load receiving and transferring engagement with said tool and platen, respectively.
- said means for moving said tool comprising a piston cylinder assembly connected to said tool constructed and arranged to permit either one or both of said plates to be brought into a load bearing relationship with said tool.
- said working surface of said tool is inclined downwardly away from said punch
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28863972A | 1972-09-13 | 1972-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3768296A true US3768296A (en) | 1973-10-30 |
Family
ID=23107995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00288639A Expired - Lifetime US3768296A (en) | 1972-09-13 | 1972-09-13 | Method and apparatus for pressing and indenting a workpiece |
Country Status (1)
Country | Link |
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US (1) | US3768296A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868026A (en) * | 1994-10-28 | 1999-02-09 | Wyman-Gordon Company | Stepped, segmented, closed-die forging |
US6044680A (en) * | 1997-11-13 | 2000-04-04 | Conception Et Developpement Michelin | Machining of sheet without removal of material |
US6058757A (en) * | 1997-11-13 | 2000-05-09 | Conception Et Developpement Michelin S.A. | Machining of sheet by compression without removal of material |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3273493A (en) * | 1965-10-13 | 1966-09-20 | Logemann Brothers Co | Apparatus for processing scrap material |
-
1972
- 1972-09-13 US US00288639A patent/US3768296A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3273493A (en) * | 1965-10-13 | 1966-09-20 | Logemann Brothers Co | Apparatus for processing scrap material |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868026A (en) * | 1994-10-28 | 1999-02-09 | Wyman-Gordon Company | Stepped, segmented, closed-die forging |
US6044680A (en) * | 1997-11-13 | 2000-04-04 | Conception Et Developpement Michelin | Machining of sheet without removal of material |
US6058757A (en) * | 1997-11-13 | 2000-05-09 | Conception Et Developpement Michelin S.A. | Machining of sheet by compression without removal of material |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765 Effective date: 19850610 |
|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK,PENNSYLVANIA Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 |
|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:WEAN UNITED INC./NOW WEAN INCORPORATED PA CORP.;REEL/FRAME:005004/0152 Effective date: 19881013 |
|
AS | Assignment |
Owner name: MITSUI ENGINEERING & SHIPBUILDING CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WEAN INCORPORATED, A CORP. OF PA.;REEL/FRAME:005208/0359 Effective date: 19890803 Owner name: WEAN INCORPORATED, A CORP. OF PA., PENNSYLVANIA Free format text: MERGER;ASSIGNOR:WEAN UNITED, INC., A CORP. OF OHIO;REEL/FRAME:005208/0358 Effective date: 19890804 |