EP0177061A2 - Process for forming metallic articles and castings used therein - Google Patents
Process for forming metallic articles and castings used therein Download PDFInfo
- Publication number
- EP0177061A2 EP0177061A2 EP85112622A EP85112622A EP0177061A2 EP 0177061 A2 EP0177061 A2 EP 0177061A2 EP 85112622 A EP85112622 A EP 85112622A EP 85112622 A EP85112622 A EP 85112622A EP 0177061 A2 EP0177061 A2 EP 0177061A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- end cap
- piston
- raw casting
- ram assembly
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
Definitions
- the initial raw casting in step (1) may be produced by an appropriate process.
- the casting operation may be carried out in a mould having a core associated therewith.
- the mould may have an internal mould cavity of complementary shape to the desired shape of the raw casting and the core or core pin may be located in the mould cavity having one end thereof extending into a core retaining recess at one end of the mould cavity.
- the molten metal as is usual with casting operations may be poured with the assistance of gravity into the mould cavity.
- the mould may be formed by an upper mould component or "cope” and a lower mould component or “drag".
- the core which is suitably formed from a mixture of sand and resin may be cast in the lower mould component part of the mould cavity and is responsible for forming an internal bore of the metal article of desired configuration.
- the casting may be removed from the lathe which is preferably an NC (numerically controlled) lathe and reversed so that the front clevis or rod clevis end is mounted in the tailstock and the rear clevis end is mounted in the chuck.
- the rod clevis end may be a pair of opposed holes formed in each fork or opposed part of the front bifurcated end by a suitably drilling tool and also a tapping tool associated with the tailstock of the lathe if a thread is required.
- FIGS 3-4 there are also shown tie bolt securing lugs 17A in the form of a continuous outwardly extending rib of casting 9 together with adjacent cavities 18A for tie bolts (not shown). Also shown are opposed apertures 19A for a cross bolt facility.
- FIG 9 there is also shown casting 9 supported in V-block 29B with hardened clamp pads 32A. Also shown is locating pin 29A.
- the front end cap 39 may be formed by part-off tool 33.
- the front end cap 39 may have a boring tool 40 to form an internal bore thereof and grooves 41 and 43 may be formed by grooving tool 42.
- the invention also includes within its scope the casting per se.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Actuator (AREA)
Abstract
A process for forming a metalic article such as a fluid actuated ram assembly and particularly a hydraulically actuated ram assembly which includes as an initial step production of a raw casting from a mould. Subsequently one or more transverse parting operations are effected to the casting so as to form components of the article which may subsequently be attached to form the article. Suitably the raw casting is mounted on a lathe for various machining operations to be effected prior to carrying out the parting operations.
There is also provided a raw casting which has a rear portion having a bifurcated end as well as front portion having a bifurcated end. The raw casting may also include a barrel portion having an internal bore. The rear portion may serve as a precursor for a rear end cap and associated clevis of the hydraulically actuated ram assembly and the front portion may serve as a precursor for the rod clevis of the hydraulically actuated ram assembly which may be screw threadedly attached to a piston rod or piston of the hydraulically actuated ram assembly.
Description
- THIS INVENTION relates to a process for forming metallic articles such as fluid actuated ram assemblies from an initial raw casting wherein components of the article may be produced "in situ" before being separated from the raw casting by subsequent machining, drilling or cutting operations.
- Hitherto fabrication methods for production of metallic articles such as fluid actuated ram assemblies have been formed in separate casting or machining operations from various types of metals such as aluminium, iron (including malleable or ductile iron as well as spheroidal graphite (SG) iron and cast iron) and steel. This meant that each component is being produced separately and did not provide a manufacturing operation that was economically cost effective in relation to labour costs and time. It was also found that due to the different tolerances that were applicable that the components may not have been machined or formed properly with subsequent disadvantages in loss of accuracy owing to lack of concentricity or misalignment. It was also to be appreciated that having components formed separately meant that often components were manufactured in different locations'.and assembled at another location which substantially increased stock inventory and lead times in relation to manufacture of the various components of a metallic article.
- It therefore is an object of the invention to provide a process for forming metallic articles from a raw casting which alleviates the abovementioned disadvantages of the prior art.
- The process of the invention includes the steps ofs
- (1) producing an raw casting from a mould optionally having an internal bore; and
- (2) performing one or more transverse parting operations to said casting so as to form components of the article.
- The initial raw casting in step (1) may be produced by an appropriate process. Thus in one form the casting operation may be carried out in a mould having a core associated therewith. The mould may have an internal mould cavity of complementary shape to the desired shape of the raw casting and the core or core pin may be located in the mould cavity having one end thereof extending into a core retaining recess at one end of the mould cavity. The molten metal as is usual with casting operations may be poured with the assistance of gravity into the mould cavity. Suitably the mould may be formed by an upper mould component or "cope" and a lower mould component or "drag". The core which is suitably formed from a mixture of sand and resin may be cast in the lower mould component part of the mould cavity and is responsible for forming an internal bore of the metal article of desired configuration.
- In relation to the cavity process described above both the top mould component and the bottom mould component may be formed from pattern plates or pattern boxes as is known in the art. Usually there will also be provided one or more locating dowels between the top mould component and the bottom mould component and if necessary clamping between both top and bottom mould components may be effected by any appropriate means.
- The casting which is produced by the abovementioned casting process may then be subsequently subjected to appropriate machining operations prior to division or parting off of the various components of the article. In relation to formation of grooves and the like in regard to the casting it is preferred that such grooves be formed in the casting operation rather than the subsequent machining operations.
- Preferably the casting produced by the process of the invention is suitably designed for a fluid actuated ram assembly. Thus preferably the ram assembly will comprise a rear bifurcated end appropriate for functioning subsequently as a rear clevis attached to a rear end cap.
- The casting may be dislodged from this mould in any suitable manner such as being removed by inspection with a hammer or by gravity.
- The casting may also comprise a rear portion having one or more locating portions or flats so as to define locations for one or more rear ports. The casting may also include the internal bore described above having an end wall formed by the rear portion. The said end wall may also include a locating and centering groove or rib which may act as a "tag" for the core. The groove or rib may comprise any suitable shape such as being square, round or rectangular. The casting may then include a cylinder or barrel portion containing the said internal bore and one or more locating portions or flats for defining one or more front ports. There also may be provided a groove which may function as a suitable boundary between a front bifurcated end which may be subsequently utilized as a clevis for the piston rod of the fluid actuated ram assembly and preferably the front end cap located frontwardly of the cylinder or barrel portion.
- After formation of a casting as described above said casting may then be mounted on a lathe. Preferably the front end of the casting is attached to a lathe chuck although of course it is also possible to commence parting operations with respect to the casting by mounting the rear end of the casting in the lathe chuck which is mounted on a rotating mandrel associated with a headstock of the lathe. However the former arrangement is prefèrred.
- The rear end of the casting is suitably supported in a rotatably mounted centering device associated with a tailstock of the lathe. However this is not essential and the centering device may be non-rotatably mounted to the tailstock if desired.
- In the above described arrangement there also may be provided a turning tool or profiling tool mounted on a tool support or saddle of the lathe. The saddle may be automatically reciprocatable if desired or alternatively it may have an automatic initial stroke and manual return stroke. The tool support is suitably slidably mounted to the lathe so that it is adjustable transversely as well as longitudinally. The turning tool may be used to form the abovementioned boundary groove between the front bifurcated end and the front end cap although as stated previously this boundary groove may be formed in the casting operation if desired.
- Preferably the turning tool which is stationary with respect to the rotating casting may be used to dress or fettle the exterior surface of the casting and in particular part of the casting adjacent the rear bifurcated end which suitably corresponds to part of a substantially all of the rear end cap.
- Subsequently the casting may be removed from the lathe which is preferably an NC (numerically controlled) lathe and reversed so that the front clevis or rod clevis end is mounted in the tailstock and the rear clevis end is mounted in the chuck. At this stage the rod clevis end may be a pair of opposed holes formed in each fork or opposed part of the front bifurcated end by a suitably drilling tool and also a tapping tool associated with the tailstock of the lathe if a thread is required.
- After this step the rod clevis may then be separated by a transverse parting operation or cutting operation carried out by a parting off tool attached to the saddle of the lathe.
- The body of the casting may at the rod clevis end then be bored and grooved by a suitable boring tool and grooving tool respectively so as to form the front end cap which may be subsequently parted off from the body of the casting by a parting-off tool.
- Subsequently the piston may be formed by a taper boring tool, turning and grooving tool as illustrated hereinafter before being parted from the casting by a parting-off tool. Finally the rear end cap may be formed by a turning tool while still being mounted in the chuck of the lathe. The clevis holes of the rear end cap may also be formed subsequent to this step or alternatively by a drilling and tapping operation when the rod clevis end of the casting was mounted in the chuck of the lathe.
- It will also be appreciated that the abovementioned sequence of steps need not be carried out in the aforementioned order and any suitable order or sequence may be adopted so as to form as separate components from the raw casting which include:
- (i) the piston rod clevis
- (ii) the front end cap
- (iii) the piston, and
- (iv) the rear end cap.
- Following manufacture of the abovementioned components as described above a cylinder tube and piston rod may be manufactured or obtained from a suitable source and the complete ram assembly may be assembled in the following manner -
- (1) the front end cap is welded to the cylinder tube after it is preferably reamed to allow for contraction during the welding process;
- (2) the piston rod seal and rod wiper seal are fitted to the front end cap;
- (3) the rod clevis is attached to the piston rod;
- (4) the piston rod is passed through the internal bore of the front end cap and hence into the interior of the cylinder tube;
- (5) the piston may be fitted with a piston seal and piston wear ring and passed into the cylinder tube through a rear end thereof and subsequently passed over an adjacent tapered end of the piston rod;
- (6) a piston retaining nut may then be securely torqued to the piston rod;
- (7) the piston may then be withdrawn to the front end of the cylinder tube, and
- (8) the rear end cap may be positioned abutting the rear end of the cylinder tube and welded thereto.
- Reference may now be made to a preferred embodiment of the invention as shown in the attached drawings wherein:
- FIG 1 is a partly broken away perspective view of the casting;
- FIG 2 is a perspective view of the casting of FIG 1;
- FIG 3 is a partly broken away perspective view of a modified casting;
- FIG 4 is a perspective view of the casting of FIG 3;
- FIG 5 is a sectional view of the mould for forming the casting;
- FIG 6 is a similar view to FIG 5 showing a modified mould;
- FIG 7 is a view showing the casting supported on a drilling and tapping stand for drilling and tapping operations;
- FIGS 8 and 9 are schematic views of the casting supported on the lathe prior to the parting off operations;
- FIG 10 is a schematic view similar to FIG 8 showing the drilling and tapping operation necessary to form the rod clevis;
- FIG 11 is a schematic view similar to FIG 8 showing the formation of the front end cap;
- FIG 12 is a schematic view similar to FIG 8 showing the formation of the piston;
- FIG 13 is a schematic view similar to FIG 8 showing the formation of the rear end cap; and
- FIG 14 is a schematic view similar to FIG 8 showing formation of a single acting hydraulic ram assembly;
- FIG 15 is a perspective view of a hydraulic ram assembly constructed by the method of the invention;
- FIGS 16-19 show varying arrangements in schematic form of the interconnection between the cylindrical tube and front end cap and rear end cap;
- FIG 20 shows an exploded perspective view of a hydraulic ram assembly constructed in accordance with the invention;
- FIG 21 shows a prespective view of the assembled hyraulic ram assembly shown in FIG 19;
- FIGS 22-24 shows various forms of a single acting hydraulic ram assembly constructed in accordance with the invention; and
- FIG 25 is a side view of a hydraulic ram assembly constructed in accordance with the invention different to that shown in FIG 19 or FIG 20.
- The casting 9 shown in FIGS 1-2 includes a
rear portion 10, locatingflats internal bore 13,end wall 14 having locating and centeringgroove 15,barrel portion 16,boundary groove 17, frontbifurcated end 18 and rearbifurcated end 19. - In FIGS 3-4 there are also shown tie bolt securing lugs 17A in the form of a continuous outwardly extending rib of casting 9 together with
adjacent cavities 18A for tie bolts (not shown). Also shown are opposedapertures 19A for a cross bolt facility. - In FIGS 5-6 the
mould 20 includesupper component 21,bottom component 22,core 23 and thecasting 9 contained in themould cavity 24. The core 23 forms theinternal bore 13 of thecasting 9 and the mould cavity is also responsible for formation ofgrooves flats 26 of both bifurcated ends 18 and 19 of casting 9. Also shown aregrooves 24A for formingribs 17A and enlargedpart 23A ofcore 23 for forming the internal bore of the rearend cap part 22A ofcore 23forms groove 15. - In FIG 7 there is shown drilling and tapping stand 27A for supporting
casting 9 in a vertical attitude although casting 9 could be supported in a horizontal attitude if required. Also shown are lockingscrews 28A, locatingpins 29A, and opposed V blocks 30A and 31A. Also shown are hardenedclamp pads 32A as well as clevishole drill 33A fordrilling holes 34A top and bottom in casting 9 as shown. Also shown is port drill andspotface 35A andport tap 36A for tappingfluid ports 58 in casting 9.Stand 27A is indexable or rotatable in 90 degrees increments. - In FIGS 8-9 the
casting 9 is initially supported in a lathe as shown wherein therear end 19 is supported in atailstock 27 of the lathe by a rotatably mounted centeringdevice 28. Thelathe chuck 29 ofheadstock 30 supportsfront end 18 as shown. A turningtool 31 initially fettles or machines rearend cap portion 10 as shown orbarrel portion 16 as well if required (shown in dotted outline)dugs 17A may be retained or shorn off if desired. - In FIG 9 there is also shown casting 9 supported in V-
block 29B withhardened clamp pads 32A. Also shown is locatingpin 29A. - In FIG 10 the orientation of casting 9 in the lathe is reversed. The
rod clevis 32 is formed by a part-off tool 33 as shown.Apertures 36 inrod clevis 32 may be formed by a drilling tool 37 and tapping tool 38 if the embodiment of FIG 7 is not used. - In FIG 11 the
front end cap 39 may be formed by part-off tool 33. Thefront end cap 39 may have aboring tool 40 to form an internal bore thereof andgrooves 41 and 43 may be formed by groovingtool 42. - In
FI G 12 thepiston 44 may have a tapered internal bore 45 formed bytaper boring tool 46. The groove 47 of piston-44 may be formed by groovingtool 48 andpiston 44 may be separated fromrear end cap 49 by part-off tool 33. When still supported in the lathe therear end cap 49 as shown in FIG 13 may be dressed by turningtool 31 which also may be used tomachine piston 44 as shown in FIG 12. - In FIG 14 there is shown the necessary step of forming a single acting hydraulic ram assembly wherein the operations in FIGS 11-12 are omitted and part off
tool 33 separatesfront end cap 39 andrear end cap 49 as shown with front end cap being formed bytools piston 44 being omitted. - The
hydraulic ram assembly 50 shown in FIG 15 includesrod clevis 32, apertures or pin holes 36,piston rod 51,front end cap 39,cylindrical tube 52,piston 44,piston wear ring 53,piston seal 54,front ports 55,rod seal 56,rod wiper 57,rear end cap 49,rear ports 58, apertures or pin holes 59 of rearend cap clevis 60 andpiston retaining nut 61 attached topiston rod 51. - The
ram assembly 50 may be assembled by: - (i) welding
front end cap 39 totube 52; - (ii)
fitting seal 56 andwiper 57 tofront end cap 39; - (iii) attaching
rod clevis 32 topiston rod 51; - (iv) passing
piston rod 51 throughinternal bore 62A ofrear end cap 39 and hence intotube 52; - (v) attaching
piston seal 54 and wearring 53 topiston 44 and passingpiston 44 intotube 52 through the rear end thereof and subsequently passing over the adjacenttapered end 63 ofpiston rod 51; - (vi) attaching
nut 61 torod 51; - (vii) withdrawingwpiston 44 to the front end of
tube 52; and - (viii) welding
rear end cap 49 totube 52. - The invention also includes within its scope the casting per se.
- The process of the invention is extremely advantageous in that it enables the production of hydraulic ram assemblies to be produced in an efficient and extremely cost effective manner while at the same time maintaining proper tolerances and alignment including concentricity between components.
- In a variation of the process as described above it will be appreciated that the
front end cap 39 may be obtained from another source and in one form for example may be screw threadedly attached to a cylinder tube or welded thereto. In this embodiment the raw casting may compriserod clevis 32,piston 44 andrear end cap 49.Piston 44 may also be omitted for a single acting cylinder as described above. - Also in relation to formation of
ram assembly 50 as described abovefront end cap 39 may be screw threadedly attached totube 52 instead of being welded thereto if desired. - In another variation of the invention the raw casting may be produced from a mould without having an internal bore which may be formed in the casting separately by a machining or boring tool. However it is preferred that the internal bore be formed in the mould as previously described.
- In another embodiment of the invention the
rear end cap 49 may be screw threadedly attached to anadjacent cylinder tube 52. - In FIG 16 there is shown
rear end cap 49 welded totube 52 at 49B andfront end cap 39 welded totube 52 at 52A. - In FIG 17 there is shown
rear end cap 49 screw threadedly attached totube 52 at 49C andfront end cap 39 screw threadedly attached totube 52 at 49D. FIG 18 showsrear end cap 49 screw threadedly attached totube 52 at 49C andfront end cap 39 welded thereto at 52A. FIG 19 shows a reverse situation to that of FIG 18. Also shown are sealingrings 55 and associated retaininggrooves 54. - In FIG 20 an exploded perspective view of a hydraulic ram assembly different to that shown in FIG 15 is illustrated. Features common to FIG 15 are identified by the same reference numerals. There is also shown
tie rod 62,apertures 63 in securinglugs 17A fortie rods 62, front endcap sealing ring 64,front clevis bolt 65,clevis pin 67 and tie rod nuts 69. Also shown isclip 70 andnut 71 forfront clevis bolt 65. Fourtie bolts 62 may be used if required. - FIG 20 shows a schematic view of a hydraulic ram assembly constructed in accordance with the invention wherein front clevis or
rod clevis 32 is screw threadedly attached topiston rod 51 at 72. Howeverfront end cap 39 may be attached to barrel ortube 52 andrear end cap 49 may be attached totube 52 as shown previously bytie bolts 62. The assembly shown in FIG 20 may be assembled by the following steps - (a) screw threadedly attaching
rod clevis 32 topiston rod 51; - (b) sliding
piston rod 51 throughfront end cap 39 which is then slidably mounted thereon; - (c) sliding
piston 44 ontorod 51 and then attachingnut 61; - (d) sliding
barrel 52 overpiston 44 until it abutsspigot 76; - (e) engaging
rear end cap 49 withbarrel 52 andfront end cap 39 withbarrel 52 and attaching the whole assembly by therods 62. - Steps (e) and (f) may be replaced by screw threaded or welded attachment between
barrel 52 andfront end cap 39 andrear end cap 49 as described previously. The fully welded version is disposable. - In FIG 21 the assembled hydraulic cylinder assembly from the components shown in FIG 20 is illustrated.
- FIGS 22-24 show a single acting hydraulic ram assembly in accordance with the invention. FIG 22 illustrates an assembly where
front end cap 39 andrear end cap 49 are screw threadedly attached tobarrel 52 at 73 and 74 respectively. FIG 23 illustrates a fully welded version whereinpiston rod 51 does not have apiston 44 in the case of the double acting versions shown previously and has a taperedend 75. FIG 24 shows a tie rod version wherein lugs 17A are included together withtie rods 62 which extend throughapertures 63 and retained bynuts 69 as described previously.
Claims (29)
1. A process for forming a metallic article from a raw casting which includes the steps of:
(1) producing a raw casting from a mould optionally having an internal bore; and
(2) performing one or more transverse parting operations to said casting so as to form components of the article.
2. A process as claimed in claim 1 wherein the article is a fluid actuated ram assembly.
3. A process as claimed in claim 2 wherein the article is a hydraulically actuated ram assembly.
4. A process as claimed in claim 3 wherein in step (1) the mould has an internal mould cavity of complementary shape to the desired shape of the raw casting.
5. A process as claimed in claim 4 wherein the mould cavity has an enlarged end portion which corresponds to an internal passage in a rear end cap of the hydraulically actuated ram assembly.
6. A process as claimed in claim 4 wherein the mould recess is provided with a pair of circumferential grooves corresponding to tie bolt securing lugs of the hydraulically actuated ram assembly.
7. A process as claimed in any preceding claim wherein the raw casting is subjected to one or more machining operations before step (2).
8. A process as claimed in claim 7 wherein initially the raw casting is mounted on a lathe wherein one end of the casting is mounted on a lathe chuck and the other end is supported by a rotatably or non-rotatably mounted centering device associated with a tailstock of the lathe.
9. A process as claimed in claim 8 wherein there is also provided a profiling tool mounted on a tool support which is adjustable transversely as well as longitudinally to the raw casting for machining operations.
10. A process as claimed in claim 7, 8 or 9 wherein prior to said machining operations the raw casting is mounted in a drilling tapping stand and dulled and tapped so as to form transverse passages in each end of the casting corresponding to end clevises of the hydraulically actuated ram assembly and one or more fluid ports.
11. A process as claimed in claim 8 wherein the orientation of the raw casting relative to the lathe is reversed and a rod clevis component is parted from the casting by a transverse parting operation.
12. A process as claimed in claim 11 wherein a front end cap component is formed by a transverse parting subsequent to formation of the rod clevis.
13. A process as claimed in claim 12 wherein the piston component is subsequently formed by a transverse parting operation after formation of the front end cap leaving a rear end cap component supported in the lathe chuck.
14. A process as claimed in claim 13 wherein the hydraulically actuated ram assembly is formed by attachment of the piston rod clevis, front end cap piston and rear end cap to a cylinder tube and piston rod.
15. A process as claimed in claim 12 wherein the front end cap component is bored and internally grooved before being parted from the raw casting.
16. A process as claimed in claim 13 wherein the piston component is bored and grooved prior to being parted from the raw casting.
17. A process as claimed in claim 12 wherein after formation of the front end cap component a rear end cap is supported in the lathe chuck to thereby provide a front end cap component, a rear end cap component and a rod clevis which are subsequently attached to a cylinder tube and piston to form a single acting hydraulically actuated ram assembly.
18. A process as claimed in claim 14 wherein the hydraulically actuated ram assembly is formed by the following steps -
(i) attachment of the front end cap to the cylinder tube;
(ii) fitting a piston rod seal and rod wiper seal to the front end cap;
(iii) attaching the rod clevis to the piston rod;
(iv) passing the piston rod through an internal bore of the front end cap and hence into the interior of the cylinder tube;
(v) fitting of a piston seal and piston wear ring to the piston which is subsequently passed into the cylinder tube through a rear end thereof and subsequently attached to the piston rod; and
(vi) attaching the rear end cap to the cylinder tube.
19. A process for forming a metallic article substantially as herein described with reference to the drawings.
20. A metallic article when formed by the process of any preceding claim.
21. A hydraulically actuated ram assembly when formed by the process of claims 3 to 19.
22. A raw casting comprising -
(i) a rear portion having a bifurcated end; and
(ii) a barrel portion including an internal bore; and
(iii) a front portion having a bifurcated end.
23. A raw casting as claimed in claim 22 wherein the rear portion is provided with one or more locating flats so as to define locations for one or more fluid ports.
24. A raw casting as claimed in claim 22-23 wherein the barrel portion has an end wall formed by the rear portion having a locating and centering groove.
25. A raw casting as claimed in any one of claims 22-24 wherein the barrel portion has one or more locating flats defining fluid ports.
26. A raw casting as claimed in any one of claims 22 to 25 wherein the casting includes an external groove separating the front portion and the barrel portion.
27. A raw casting as claimed in any one of claims 22 to 26 wherein bifurcated end of the rear portion has a pair of opposed branches each having on an external surface thereof a locating flat wherein each locating flat is in substantial alignment for subsequent drilling of opposed apertures.
28. A raw casting as claimed in any one of claims 23 to 28 wherein the bifurcated end of the front portion has a pair of opposed branches each having on an external surface thereof a locating flat wherein each locating flat is in substantial alignment for subsequent drilling of opposed apertures.
29. A raw casting substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPG752484 | 1984-10-05 | ||
AU7524/84 | 1984-10-05 | ||
AUPG809484 | 1984-11-13 | ||
AU8094/84 | 1984-11-13 | ||
AU1034/85 | 1985-06-14 | ||
AUPH103485 | 1985-06-14 | ||
AU48327/85A AU578495B2 (en) | 1984-10-05 | 1985-10-04 | Process for forming metallic articles and castings used therein |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0177061A2 true EP0177061A2 (en) | 1986-04-09 |
EP0177061A3 EP0177061A3 (en) | 1989-08-02 |
Family
ID=27423320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85112622A Withdrawn EP0177061A3 (en) | 1984-10-05 | 1985-10-04 | Process for forming metallic articles and castings used therein |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0177061A3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5604969A (en) * | 1993-02-17 | 1997-02-25 | Automotive Products, Plc | Method of manufacturing hydraulic actuators |
US9249763B2 (en) | 2010-09-02 | 2016-02-02 | Mahle International Gmbh | Hollow plastic piece |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2553935A (en) * | 1948-04-17 | 1951-05-22 | F A Boucha | Method of manufacturing connecting rods |
US3571883A (en) * | 1968-04-19 | 1971-03-23 | Westinghouse Air Brake Co | Method of making a fluid operated cylinder device |
EP0054286A1 (en) * | 1980-12-12 | 1982-06-23 | Posi-Seal International GmbH | Method of manufacturing a cast iron part with a loose flange |
US4384511A (en) * | 1980-10-17 | 1983-05-24 | Mefferd Roy J | Hydraulic cylinder |
-
1985
- 1985-10-04 EP EP85112622A patent/EP0177061A3/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2553935A (en) * | 1948-04-17 | 1951-05-22 | F A Boucha | Method of manufacturing connecting rods |
US3571883A (en) * | 1968-04-19 | 1971-03-23 | Westinghouse Air Brake Co | Method of making a fluid operated cylinder device |
US4384511A (en) * | 1980-10-17 | 1983-05-24 | Mefferd Roy J | Hydraulic cylinder |
EP0054286A1 (en) * | 1980-12-12 | 1982-06-23 | Posi-Seal International GmbH | Method of manufacturing a cast iron part with a loose flange |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5604969A (en) * | 1993-02-17 | 1997-02-25 | Automotive Products, Plc | Method of manufacturing hydraulic actuators |
US9249763B2 (en) | 2010-09-02 | 2016-02-02 | Mahle International Gmbh | Hollow plastic piece |
Also Published As
Publication number | Publication date |
---|---|
EP0177061A3 (en) | 1989-08-02 |
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