US1717720A - Reconditioning metal mold - Google Patents
Reconditioning metal mold Download PDFInfo
- Publication number
- US1717720A US1717720A US137965A US13796526A US1717720A US 1717720 A US1717720 A US 1717720A US 137965 A US137965 A US 137965A US 13796526 A US13796526 A US 13796526A US 1717720 A US1717720 A US 1717720A
- Authority
- US
- United States
- Prior art keywords
- mold
- sleeve
- shaft
- cracks
- rollers
- 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
Images
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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
- B24B39/02—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution
- B24B39/023—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution the working tool being composed of a plurality of working rolls or balls
-
- 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
- Y10T29/47—Burnishing
Definitions
- Patenten/lY (18, 1929..
- This'y invention relates to molding and has 'special'reference tol a method and apparatus for repairing cracked or ,checked metallic molds.
- the present invention has for'its objects, among others, the provision of an improved method of,treating cracked metal molds to close the cracks and also the provision of improved apparatus whereby the method may be carried'in practical operation and wherein means will be provided for adjusting the device to suit molds of different internal diameters and molds having internaldiameters varying at different points such as tapered molds.
- .F gure 1 is a ongitudinal section, partly in elevation, showing an improved device for closin the cracks in a mold of the character descri ed; c
- Figure 2 is a section on the line 2-2 of Figure 1; v
- Figure 3 is a diagrammatic section of a checked or cracked mold showing the characteristic condition of such mold before repairing
- Figure 4 is a view similar to Figure 3 showing diagrammati'cally a characteristic section through the mold after being repaired by the present method; 1 4
- Figure 5 is a sectional view, partly in elevation, of an appiratus for treating molds in accordance wit vthis invention.4 l
- Figures 6 and are diagrammatic sectional I views similar to Figs. ⁇ 3 and 4 showing respectively a checked and a repaired mold when the checks are not very large.
- a mold supporting arrangement comprising a casing or housing 8 provided with rollers 9 at either end upon opposite sides upon which lthe mold 1'3 may revolve.
- the housing is carried at its ends upon flanged Wheels 10 which rest upon track rails 11 extending along 'opposite sides of the housing.”
- the housing 8y may be formed 1n two longitudinal divided halves bolted together.
- the right-hand end is provided with ⁇ an end ring member 8l spaced away to provide an annular space to receive the gear ring 4, and secured in any suitable manner to the bodyJ 'of the housing as by *a number of straps Sb-.bolted to ermit the ring member to be. readily de taiched when a mold is Vto be inserted or re-f rmoved.
- the joints betweenthe stationary housing and the rotatable mold and the rotary sleeve -5 maybe closed by means of split piston rings 5a.
- the mold is rotated by means ofasuitable motor 1 mounted on the housing and provided with a pinion 2, in mesh with a gear 3, which drivesgtlie gear ring 4, splined to the /rotary sleeve 5 which revolves in bearings 'mannen
- the housing “may bemoyed longimotoris rotating the mold, by means of the "hydraulic cylinder 6, having its piston rod l 7 secured to the block 7 a carried by the housis inserted in the mold for rolling the latter ing.
- a special rolling tool which is employed for closing the cracks in the mold and this tool consists of a sleeve through which extends a shaft 16.
- a sleeve 17 of suiicient diameter to surround the shaft 16 in spaced relationand within this sleeve adjacent its center, is secured a, collar 18 through which the shaft passes.
- Telescopically mounted in the open end of the sleeve 17 is a short sleeve 19 through which the threaded end 20 ofthe A shaft 16 passes.
- an adjusting nut 21 and between said nut and the sleeve 19 is a washer 22.
- a coiled compression spring 23 Within the sleeve-17 between the collar 18 and sleeve .19 is a coiled compression spring 23 and a sim- 1lar spring 24 is arranged on the opposite side of said collar and bears against a collar 25 pinned to the shaft 16.
- This arrangement permits adjustment of the shaftv16 in the sleeve 15, while, at the same time, permitting the shaft to move in either direction against the action of said springs.
- a head 26 On the opposite or forward end of the sleeve 15 is pinned a head 26 which is splined to the shaft 16 by a key 27
- the forward end of the shaft 16 is reduced and on this forward end is fixed what may be termed a movable head 28, the head 26 being a fixed head in comparison.
- the head 28 is held on the shaft by a nut 29 and washer 30.
- the adjacent ends of these heads are frustoconical in form and on these frusto-conical ends rest the corresponding ends of rollers 31 having l journals 32 mounted in the radial slots 33 of a roller cage 34. End plates 35 are held to the cage by bolts 36.
- the rollers can thus move in and out radially and project beyond the periphery of the cage.
- This rolling head and the rollers 31 are adjusted to bear against the interior of the mold by proper manipulation of the nut 21, revolution in one direction moving the head 28 toward the head 26 and causing projection of the rollers and revolution'of the nut in
- Jn Figure 3 there is diagrammatically disclosed the condition of a mold 13 under checking and it will be noted that the interior of the mold is full of radial cracks, the edges of which have sprung upwardly under the influence of the stresses set up by alternate heating and cooling. If the roller head be revolved through such a mold in proper ad- ]ustment the pressure exerted by the rollers will-,force these edges back to the normal surface and, due to the decrease in the curvain Fig. 3 and are more like those illustrated in Fig. 5, so that they may be closed and the inner surface may be made smooth as indicated in Fig. 7.
- a sleeve In a device for rolling the checked surface of internally checked tubular metallic molds, a sleeve, a shaft extending through said sleeve, a lixed head on one end of the sleeve, a movable head carried by the correspending end of the shaft, said heads having opposed frusto-conical ends, rollers having frusto-conical ends resting on the frustoconical ends of the heads, a roller cage supporting said rollers on said heads, and rcsiliently yieldabl'e means to impart longitudinal movement of the shaft relative to the sleeve in either direction to thereby automatically adjust the rollers to compensate for variations in the interior wall of the mold.
- a sleeve a shaft extending through said sleeve, a fixed head on one end of the sleeve, a movable head carried by the corresponding end of the shaft, said heads having opposed frusto-conica-l ends, rollers having frusto-conical ends resting on the frusto-conical ends ofthe heads, a roller cage supporting said rollers on said heads, a second sleeve carried by the first sleeve and spaced shaft in spaced relation to the first collar 10 concentrically from the shaft, a collar fixed and on the side opposite the spring, and a within the second sleeve and surrounding second coiled compression sprlng between the shaft, a third sleeve telescopically mountsaid collars.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
June 18, 1929 vs-l. M. MARTIN ET AL RECONDITIONING METAL MOLDS Filed Sept. 27, 1926 2 Sheets-Sheet l wmv Qou R., QM. m bh.
`une 18, 1929.
lw. M. MARTIN 'ET AL REGONDITIONING METAL MOLDS Filed sept. 27, 192s l 2 sheets-sheet 2 NaN.
Patenten/lY (18, 1929..
UNITED lSTATES* PATENT oFFicE..
WILLIAM H. MARTIN AND enAnLEs N. enuncia, or BunLINGTo'N, NEW JERSEY.
y nEc'JoNl-JITIONIN;L METAL nenn. ef
lApplication med september 27, 192s. serial No. 137,965.
This'y invention relates to molding and has 'special'reference tol a method and apparatus for repairing cracked or ,checked metallic molds.
In themolding' of pipe and other like arti- -ject in use toalternate heating and cooling and Ythis sets up internal stresses which cause cracking' or checking of the internal surface ofthe mold sothat the article cast therein presents a rough exterior-and is dilicult and sometimes impossible to Withdraw from the mold. This is due partly to the development of the cracks themselves Aand partly to the .edges of the cracks curling upwards from the` lnormal surface of the mold. Consequently such metallic molds-have heretofore been disl carded as soon as such cracking or checking Abecameserious whilethe'mold actually, if the cracks were closed, could be used for a much longer time.
The present invention has for'its objects, among others, the provision of an improved method of,treating cracked metal molds to close the cracks and also the provision of improved apparatus whereby the method may be carried'in practical operation and wherein means will be provided for adjusting the device to suit molds of different internal diameters and molds having internaldiameters varying at different points such as tapered molds. Y f
` In the following detailed description of -this invention, we shall refer to the accom` panying drawin s in which:-
.F gure 1 is a ongitudinal section, partly in elevation, showing an improved device for closin the cracks in a mold of the character descri ed; c
Figure 2 is a section on the line 2-2 of Figure 1; v
Figure 3 is a diagrammatic section of a checked or cracked mold showing the characteristic condition of such mold before repairing; l
. Figure 4 is a view similar to Figure 3 showing diagrammati'cally a characteristic section through the mold after being repaired by the present method; 1 4
Figure 5 is a sectional view, partly in elevation, of an appiratus for treating molds in accordance wit vthis invention;4 l
\ Figures 6 and are diagrammatic sectional I views similar to Figs.` 3 and 4 showing respectively a checked and a repaired mold when the checks are not very large.
In carrying out this method by whic cracked or checked molds are repaired, the
mold is suitably supported and the edges of the cracks are forced down to thenormal surface of the mold. This causes the up-y curved edges on the opposite sides of the crack to move toward each other until they contact and thus close the crack. The neces"- y and smooth the surface of the mold by forcing the material at the opposite edges of each crack together and into conformity with the .i
normal surface of. the mold.-
Any suitable apparatus for supporting the mold and for causing relative movement between the mold andthe operating mechanism maybe employed. Hence for purposes of illustration only, We have shown in` Fig: 5, a mold supporting arrangement comprising a casing or housing 8 provided with rollers 9 at either end upon opposite sides upon which lthe mold 1'3 may revolve. The housing is carried at its ends upon flanged Wheels 10 which rest upon track rails 11 extending along 'opposite sides of the housing." I `The housing 8y may be formed 1n two longitudinal divided halves bolted together. The right-hand end is provided with` an end ring member 8l spaced away to provide an annular space to receive the gear ring 4, and secured in any suitable manner to the bodyJ 'of the housing as by *a number of straps Sb-.bolted to ermit the ring member to be. readily de taiched when a mold is Vto be inserted or re-f rmoved. The joints betweenthe stationary housing and the rotatable mold and the rotary sleeve -5 maybe closed by means of split piston rings 5a.
The mold is rotated by means ofasuitable motor 1 mounted on the housing and provided with a pinion 2, in mesh with a gear 3, which drivesgtlie gear ring 4, splined to the /rotary sleeve 5 which revolves in bearings 'mannen The housing "may bemoyed longimotoris rotating the mold, by means of the "hydraulic cylinder 6, having its piston rod l 7 secured to the block 7 a carried by the housis inserted in the mold for rolling the latter ing.
We have devised a special rolling tool which is employed for closing the cracks in the mold and this tool consists of a sleeve through which extends a shaft 16. To one end of the sleeve 15 is pinned or otherwise secured a sleeve 17 of suiicient diameter to surround the shaft 16 in spaced relationand within this sleeve adjacent its center, is secured a, collar 18 through which the shaft passes. Telescopically mounted in the open end of the sleeve 17 is a short sleeve 19 through which the threaded end 20 ofthe A shaft 16 passes. On this threaded endV is screwed an adjusting nut 21 and between said nut and the sleeve 19 is a washer 22. Within the sleeve-17 between the collar 18 and sleeve .19 is a coiled compression spring 23 and a sim- 1lar spring 24 is arranged on the opposite side of said collar and bears against a collar 25 pinned to the shaft 16. This arrangement permits adjustment of the shaftv16 in the sleeve 15, while, at the same time, permitting the shaft to move in either direction against the action of said springs. i
On the opposite or forward end of the sleeve 15 is pinned a head 26 which is splined to the shaft 16 by a key 27 The forward end of the shaft 16 is reduced and on this forward end is fixed what may be termed a movable head 28, the head 26 being a fixed head in comparison. 'The head 28 is held on the shaft by a nut 29 and washer 30. The adjacent ends of these heads are frustoconical in form and on these frusto-conical ends rest the corresponding ends of rollers 31 having l journals 32 mounted in the radial slots 33 of a roller cage 34. End plates 35 are held to the cage by bolts 36. The rollers can thus move in and out radially and project beyond the periphery of the cage. This rolling head and the rollers 31 are adjusted to bear against the interior of the mold by proper manipulation of the nut 21, revolution in one direction moving the head 28 toward the head 26 and causing projection of the rollers and revolution'of the nut in the other direction aly:sa
veo
lowing the heads to separate and the rollers to move inwardly. c
Jn Figure 3 there is diagrammatically disclosed the condition of a mold 13 under checking and it will be noted that the interior of the mold is full of radial cracks, the edges of which have sprung upwardly under the influence of the stresses set up by alternate heating and cooling. If the roller head be revolved through such a mold in proper ad- ]ustment the pressure exerted by the rollers will-,force these edges back to the normal surface and, due to the decrease in the curvain Fig. 3 and are more like those illustrated in Fig. 5, so that they may be closed and the inner surface may be made smooth as indicated in Fig. 7.
If there be any variations in the diameter of the Inold the springs 23 and 24 will permit automatic adjust-ment of the rollers to compensate for such variations.
l/Vhile the mold has been here shown as rotating during the operation it is obvious that the mold may be stationary while thek rollers are revolved, with the same result.
' We claim v 1. Thel method of repairing interiorly cracked metallic molds which consists in applying pressure to the mold at the edges of the cracks Isuliicient to force the edges of each crack together.
2. Themethodofrepairingtheinteriorsurfaces of molds having cracks therein wherein the edges of the cracked portions are curled up from the normal surface at the sides of the cracks which consists in exerting sulficient pressure on the said interior surface to force the curled up Aportions into normal surface positions and thereby bringing the sides of the cracks together at said surface.
3. The method of repairing a tubular metallic mold having Surface cracks extending into its internal surface Which consists in subjecting the cracked surface to a rolling operation to thereby bring the sides of the cracks together at said surface.
4. In a device for rolling the checked surface of internally checked tubular metallic molds, a sleeve, a shaft extending through said sleeve, a lixed head on one end of the sleeve, a movable head carried by the correspending end of the shaft, said heads having opposed frusto-conical ends, rollers having frusto-conical ends resting on the frustoconical ends of the heads, a roller cage supporting said rollers on said heads, and rcsiliently yieldabl'e means to impart longitudinal movement of the shaft relative to the sleeve in either direction to thereby automatically adjust the rollers to compensate for variations in the interior wall of the mold.
5. In a device for rolling the checked surface of internally checked tubular metallic molds, a sleeve, a shaft extending through said sleeve, a fixed head on one end of the sleeve, a movable head carried by the corresponding end of the shaft, said heads having opposed frusto-conica-l ends, rollers having frusto-conical ends resting on the frusto-conical ends ofthe heads, a roller cage supporting said rollers on said heads, a second sleeve carried by the first sleeve and spaced shaft in spaced relation to the first collar 10 concentrically from the shaft, a collar fixed and on the side opposite the spring, and a within the second sleeve and surrounding second coiled compression sprlng between the shaft, a third sleeve telescopically mountsaid collars.
ed in the end of the second sleeve, an ad- In testimony whereof we ax our signajusting nut screwed on said shaft to force tures.
the third sleeve inwardly of the second sleeve, A
a coiled compression spring between the col-1 WILLIAM M. MARTIN.
lar and third sleeve, a collar fixed to the CHAS. N. CHURCH.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US137965A US1717720A (en) | 1926-09-27 | 1926-09-27 | Reconditioning metal mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US137965A US1717720A (en) | 1926-09-27 | 1926-09-27 | Reconditioning metal mold |
Publications (1)
Publication Number | Publication Date |
---|---|
US1717720A true US1717720A (en) | 1929-06-18 |
Family
ID=22479827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US137965A Expired - Lifetime US1717720A (en) | 1926-09-27 | 1926-09-27 | Reconditioning metal mold |
Country Status (1)
Country | Link |
---|---|
US (1) | US1717720A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2437626A (en) * | 1943-09-04 | 1948-03-09 | United States Pipe Foundry | Method of reclaiming used metal molds |
US2916800A (en) * | 1953-04-22 | 1959-12-15 | Preis Georg | Device for finish rolling of cylinders |
US3099070A (en) * | 1961-03-01 | 1963-07-30 | Cogsdill Tool Prod | Metalworking tool |
US3130477A (en) * | 1961-01-23 | 1964-04-28 | Warren E Gill | Roller burnishing tool with releasespring adjustment |
US3160036A (en) * | 1958-08-29 | 1964-12-08 | Lockheed Aircraft Corp | Roll-forming mill |
US3938374A (en) * | 1975-02-06 | 1976-02-17 | Dynatherm Corporation | Tool for forming internal threads |
US4114431A (en) * | 1976-01-27 | 1978-09-19 | Xerox Corporation | Method of forming tubular metal products |
EP0028653A1 (en) * | 1978-12-19 | 1981-05-20 | Kubota Limited | Tubular cast piece inner surface working apparatus |
-
1926
- 1926-09-27 US US137965A patent/US1717720A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2437626A (en) * | 1943-09-04 | 1948-03-09 | United States Pipe Foundry | Method of reclaiming used metal molds |
US2916800A (en) * | 1953-04-22 | 1959-12-15 | Preis Georg | Device for finish rolling of cylinders |
US3160036A (en) * | 1958-08-29 | 1964-12-08 | Lockheed Aircraft Corp | Roll-forming mill |
US3130477A (en) * | 1961-01-23 | 1964-04-28 | Warren E Gill | Roller burnishing tool with releasespring adjustment |
US3099070A (en) * | 1961-03-01 | 1963-07-30 | Cogsdill Tool Prod | Metalworking tool |
US3938374A (en) * | 1975-02-06 | 1976-02-17 | Dynatherm Corporation | Tool for forming internal threads |
US4114431A (en) * | 1976-01-27 | 1978-09-19 | Xerox Corporation | Method of forming tubular metal products |
EP0028653A1 (en) * | 1978-12-19 | 1981-05-20 | Kubota Limited | Tubular cast piece inner surface working apparatus |
EP0028653B1 (en) * | 1978-12-19 | 1984-07-04 | Kubota Limited | Tubular cast piece inner surface working apparatus |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1717720A (en) | Reconditioning metal mold | |
US3230606A (en) | Method and apparatus for rolling rings | |
US3298218A (en) | Method and apparatus for forming wheel rims and the like | |
US3738139A (en) | Metal working | |
US4360189A (en) | Quench press | |
US2513756A (en) | Axially shifting type fluid pressure operated tire removing machine | |
US2419864A (en) | Reduction of tubular blanks | |
US3815394A (en) | Machine and method for forming tubular adjustable elbows | |
US1798742A (en) | Method and means for forging billets | |
US2588651A (en) | Machine for rolling tapered disks | |
US2350410A (en) | Apparatus for truing up tubular bodies | |
US1619479A (en) | Method of and apparatus for finishing cylindrical bearing surfaces | |
US2159900A (en) | Machine for fashioning annular sheet metal articles | |
US1943089A (en) | Brake drum swaging machine | |
US2330811A (en) | Machine for configuring tubing | |
GB1202470A (en) | Butterfly valve and process and machine for making same | |
US2286511A (en) | Tube nosing machine | |
US1457579A (en) | Method and apparatus for shaping and trimming brake drums | |
US2261465A (en) | Method of making wheels with rubberlike treads | |
JPS5928602B2 (en) | Diameter adjustment method and device for cylindrical objects | |
EP0028653B1 (en) | Tubular cast piece inner surface working apparatus | |
US1111482A (en) | Apparatus for finishing or polishing cylindrical surfaces. | |
US3805360A (en) | Method and apparatus for sizing brake drum rings | |
US1748959A (en) | Device for finishing cylindrical surfaces | |
US1076134A (en) | Pipe-flanging machine. |