US2537533A - Method of repairing cracks in castings - Google Patents
Method of repairing cracks in castings Download PDFInfo
- Publication number
- US2537533A US2537533A US716691A US71669146A US2537533A US 2537533 A US2537533 A US 2537533A US 716691 A US716691 A US 716691A US 71669146 A US71669146 A US 71669146A US 2537533 A US2537533 A US 2537533A
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- US
- United States
- Prior art keywords
- crack
- plugs
- casting
- metal
- repairing
- 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
- 238000005266 casting Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 17
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005219 brazing Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000005058 metal casting Methods 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
-
- 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
- Y10T29/49718—Repairing
- Y10T29/49732—Repairing by attaching repair preform, e.g., remaking, restoring, or patching
- Y10T29/49742—Metallurgically attaching preform
-
- 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
- Y10T29/49718—Repairing
- Y10T29/49748—Repairing by shaping, e.g., bending, extruding, turning, etc.
- Y10T29/4975—Repairing by shaping, e.g., bending, extruding, turning, etc. including heating
Definitions
- the present invention relates to improvements in methods for repairing castings and more specifically refers to an improved method for repairing breaks in castings such as cylinder blocks of internal combustion engines.
- a further object of the present invention is to accomplish the above mentioned repair without the conventional excessive heat treatment or annealing of the complete cylinder block or casting.
- Figure l is a fragmentary plan View of the conventional internal combustion engine cast cylinder block showing break or crack in the said cylinder.
- Figure 2 is a fragmentary section view out longitudinally through the cracked section and showing the insertion of a plug.
- Figure 3 is also a fragmentary section view cut longitudinally through the cracked section and showing the plug inserted and mechanically welded before brazing.
- Figure 4 is a sectional view as mentioned above and showing the completed mechanical weld.
- This operation mechanically forces the break closed and is so facilitated by the preheating which makes the metal soft and prevents further breakin when the plugs are inserted.
- This peening or mechanical welding step is followed by a heat treating operation combined with a brazing operation or by a heat treating operation without brazing along the break, so as to fuse the metal into a solid mass as well as fuse the casting metal and the inserted plugs. Any suitable or conventional brazing method is satisfactory.
- This operation seals up and fuses the break as indicated-by numeral 4 of Figure 4.
- the composition of the plug inserts depend upon the type of metallic casting to be repaired. Copper or copperized iron plugs have proved satisfactory in repairing the cylinder block casting of the conventional internal combustion engine. The above recited method for repairing casting breaks or cracks is satisfactory for merely a straight crack or a radial break. It is a simple and economical means of repairing casting breaks.
- Method of repairing a crack in a casting comprising heating the area of the casting along the. crack so as to soften the metal thereof, then driving tapered fusible metal plugs into the crack in close side by side relation along the crack, then peening the edges of the crack onto the plugs, and then heating the resultant so as to fuse the plugs conformably in place in a manner to fill the crack, and brazing said resultant so as to cover the plugs and the peened edges of the crank so as to seal the filled crack.
- Method of repairing a crack in a metal casting comprising heating the area of the crack sufficiently to soften the metal, driving tapered fusiblemetal plugs into the crack in side by side positions along the crack and peening the edges of the crack upon the plugs while the metal is still soft from the heating, said plugs being driven withsufficient force to produce conforming and intimate association of the plugs and the sides of the crack and said peenin of the edges Of the crack..']geing sufficient to maintain the driven plugs in place, and then reheating the area of the crack suiiiciently to fuse the plugs to fill the crack.
- Method of repairing a crack in a metal casting comprising heating the area of the crack sufficiently to soften the metal, driving tapered fusible rnetal plugs into the crack in side by side positions along the crack and peening the edges of the crack upon the plugs while the metal is still soft from the.
- said plugs being driven with suflicient force to produce conforming and intimate association of the plugs and the sides of the crack and said peening of the edges of the crack being sufficient to maintain: the: drivenplugs in place, and then reheating the area of the crack sufiiciently to fuse the plugs, to fill the crack,'saicl reheating being accompanied bybraze ing of the plugs and peenect edgtsvoj'the-crack together in a manner to seal the crack.
- Method of repairing a crack in a casting comprisingheating the area of the casting along the crack so-as; to soften the metal thereof, pro-- cmring ta-pered fusible metal'plugs atzleast as wide as the crack, then inserting the smaller ends of said plugs into the crack in closely spaced side by side relation along the crack and driving the plugs further into the crack so as to partly fill the crack, then peening the edges of the crack onto the plugs, and then heating the resultant so as tofuse the plugs conformably in place so as to fill the crack.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Jan. 9, 1951 G. E. INGALLS 2,537,533
METHOD OF REPAIRING CRACKS IN CASTINGS Filed Dec. 17, 1946 62 0110 ive: an; I
a e I i Patented Jan. 9, 19 51 METHOD OF REPAIRING CRACKS IN CASTING S Gerald E. Ingalls, 'lndianapolis, Ind. Application December 17, 1946, Serial No. 716,691
The present invention relates to improvements in methods for repairing castings and more specifically refers to an improved method for repairing breaks in castings such as cylinder blocks of internal combustion engines.
Cracked castings have presented considerable repair problems especially in that when castings are repaired by conventional welding methods it is necessary to remove the cylinder block casting from the remainder of the engine inorder to heat treat the casting prior to welding. This operation is cumbersome, time consuming, and expensive, and the above method has not proved generally satisfactory in all cases.
It is an object of this invention to do away with the above difficulties and to provide a method whereby a casting or cylinder which has been cracked can be repaired without requiring the removing of the cylinder block from the engine.
A further object of the present invention is to accomplish the above mentioned repair without the conventional excessive heat treatment or annealing of the complete cylinder block or casting.
Further objects and advantages of my invention will be apparent from the following detailed description and claims taken in conjunction with the annexed drawings wherein like parts are indicated by like reference numerals and Where:
Figure l is a fragmentary plan View of the conventional internal combustion engine cast cylinder block showing break or crack in the said cylinder.
Figure 2 is a fragmentary section view out longitudinally through the cracked section and showing the insertion of a plug.
Figure 3 is also a fragmentary section view cut longitudinally through the cracked section and showing the plug inserted and mechanically welded before brazing. I
Figure 4 is a sectional view as mentioned above and showing the completed mechanical weld.
Referrin now in detail to the accommpanying drawings and more specifically to Figure 1,
which illustrates an internal combustion engine cylinder block having a break or crack i. In my method of repairing such casting breaks, the general area of the break is heat treated with a torch of suitable nature in order that the metal casting may be annealed in and around the general area of the break. This operation i followed by the insertion of metallic tapered circular plugs 2 into the break or crack I ata distance relatively close together. Following the insertion of the aforementioned plugs both edges 4 Claims. (Cl. 29148) of the break are peened with a peening tool or a round headed punch and hammer so as to close the said break around the plugs and as indicated by the numeral 3. This operation mechanically forces the break closed and is so facilitated by the preheating which makes the metal soft and prevents further breakin when the plugs are inserted. This peening or mechanical welding step is followed by a heat treating operation combined with a brazing operation or by a heat treating operation without brazing along the break, so as to fuse the metal into a solid mass as well as fuse the casting metal and the inserted plugs. Any suitable or conventional brazing method is satisfactory. This operation seals up and fuses the break as indicated-by numeral 4 of Figure 4.
The composition of the plug inserts depend upon the type of metallic casting to be repaired. Copper or copperized iron plugs have proved satisfactory in repairing the cylinder block casting of the conventional internal combustion engine. The above recited method for repairing casting breaks or cracks is satisfactory for merely a straight crack or a radial break. It is a simple and economical means of repairing casting breaks.
It is apparent that many deviations from my method may be accomplished without departing from the scope and spirit of my invention, I therefore do not limit myself to the specific examples herein set forth.
What I claim as my invention is:
1. Method of repairing a crack in a casting comprising heating the area of the casting along the. crack so as to soften the metal thereof, then driving tapered fusible metal plugs into the crack in close side by side relation along the crack, then peening the edges of the crack onto the plugs, and then heating the resultant so as to fuse the plugs conformably in place in a manner to fill the crack, and brazing said resultant so as to cover the plugs and the peened edges of the crank so as to seal the filled crack.
2. Method of repairing a crack in a metal casting comprising heating the area of the crack sufficiently to soften the metal, driving tapered fusiblemetal plugs into the crack in side by side positions along the crack and peening the edges of the crack upon the plugs while the metal is still soft from the heating, said plugs being driven withsufficient force to produce conforming and intimate association of the plugs and the sides of the crack and said peenin of the edges Of the crack..']geing sufficient to maintain the driven plugs in place, and then reheating the area of the crack suiiiciently to fuse the plugs to fill the crack.
3. Method of repairing a crack in a metal casting comprising heating the area of the crack sufficiently to soften the metal, driving tapered fusible rnetal plugs into the crack in side by side positions along the crack and peening the edges of the crack upon the plugs while the metal is still soft from the. heating, said plugs being driven with suflicient force to produce conforming and intimate association of the plugs and the sides of the crack and said peening of the edges of the crack being sufficient to maintain: the: drivenplugs in place, and then reheating the area of the crack sufiiciently to fuse the plugs, to fill the crack,'saicl reheating being accompanied bybraze ing of the plugs and peenect edgtsvoj'the-crack together in a manner to seal the crack.
4. Method of repairing a crack in a castingcomprisingheating the area of the casting along the crack so-as; to soften the metal thereof, pro-- cmring ta-pered fusible metal'plugs atzleast as wide as the crack, then inserting the smaller ends of said plugs into the crack in closely spaced side by side relation along the crack and driving the plugs further into the crack so as to partly fill the crack, then peening the edges of the crack onto the plugs, and then heating the resultant so as tofuse the plugs conformably in place so as to fill the crack.
GERALD E; IN GALLS.
REFERENCES CITED The following references are of record in the file: ofthis patent:
UNITED STATES PATENTS Number Name Date 1,322,245 Klassen Nov. 18, 1919 1,384,456. Eury July 12, 1921 2 ,301,513 Brewer Nov. 10, 1942 2,361,106 Jensen Oct. 24, 1944 2,351,701 Michael's Oct. 31, 1944 2,369,415 Sherman Feb. 13, 1945
Claims (1)
1. METHOD OF RAPAIRING A CRACK IN A CASTING COMPRISING HEATING THE AREA OF THE CASTING ALONG THE CRACK SO AS TO SOFTEN THE METAL THEREOF, THEN DRIVING TAPERED FUSIBLE METAL PLUGS INTO THE CRACK IN CLOSE SIDE BY SIDE RELATION ALONG THE CRACK, THEN PEENING THE EDGES OF THE CRACK ONTO THE PLUGS, AND THEN HEATING THE RESULTANT SO AS TO FUSE THE PLUGS CONFORMABLY IN PLACE IN A MANNER TO FILL THE CRACK, AND BRAZING SAID RESULTANT SO AS TO COVER THE PLUGS AND THE PEENED EDGES OF THE CRANK SO AS TO SEE THE FILLED CRACK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US716691A US2537533A (en) | 1946-12-17 | 1946-12-17 | Method of repairing cracks in castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US716691A US2537533A (en) | 1946-12-17 | 1946-12-17 | Method of repairing cracks in castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2537533A true US2537533A (en) | 1951-01-09 |
Family
ID=24879031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US716691A Expired - Lifetime US2537533A (en) | 1946-12-17 | 1946-12-17 | Method of repairing cracks in castings |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2537533A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2711012A (en) * | 1949-09-13 | 1955-06-21 | Hal W Harman | Method of repairing cracked casting |
| US3445914A (en) * | 1966-04-18 | 1969-05-27 | Chrome Plate Inc | Method of repairing aircraft cylinder heads |
| US3464103A (en) * | 1967-07-13 | 1969-09-02 | Cleon B Harris | Method of repairing cracked metallic castings |
| US3487530A (en) * | 1967-10-09 | 1970-01-06 | Abex Corp | Method of repairing casting defects |
| EP0024142A1 (en) * | 1979-07-31 | 1981-02-25 | Chromalloy American Corporation | Method for repairing a crack in a superalloy material and an article when so repaired |
| US4638743A (en) * | 1985-07-18 | 1987-01-27 | Railcar Specialties, Inc. | Method of reinforcing a covered hopper car hatch |
| US5050385A (en) * | 1982-10-06 | 1991-09-24 | Hitachi, Ltd. | Inner cylinder for a gas turbine combustor reinforced by built up welding |
| US6003755A (en) * | 1997-02-20 | 1999-12-21 | Lockheed Martin Corp. | Method for repair welding aluminum-lithium alloys |
| US6171415B1 (en) | 1998-09-03 | 2001-01-09 | Uit, Llc | Ultrasonic impact methods for treatment of welded structures |
| US20040238508A1 (en) * | 2003-05-27 | 2004-12-02 | Rabinovich Joshua E. | Low heat input laser component repair or joining with feedstock having conforming surfaces with a substrate |
| US20050122915A1 (en) * | 2003-12-05 | 2005-06-09 | Yazaki Corporation | Communication apparatus |
| US20050145306A1 (en) * | 1998-09-03 | 2005-07-07 | Uit, L.L.C. Company | Welded joints with new properties and provision of such properties by ultrasonic impact treatment |
| US20060016858A1 (en) * | 1998-09-03 | 2006-01-26 | U.I.T., Llc | Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment |
| US20070040476A1 (en) * | 2005-08-19 | 2007-02-22 | U.I.T., Llc | Oscillating system and tool for ultrasonic impact treatment |
| US20070068605A1 (en) * | 2005-09-23 | 2007-03-29 | U.I.T., Llc | Method of metal performance improvement and protection against degradation and suppression thereof by ultrasonic impact |
| US20070244595A1 (en) * | 2006-04-18 | 2007-10-18 | U.I.T., Llc | Method and means for ultrasonic impact machining of surfaces of machine components |
| US7301123B2 (en) | 2004-04-29 | 2007-11-27 | U.I.T., L.L.C. | Method for modifying or producing materials and joints with specific properties by generating and applying adaptive impulses a normalizing energy thereof and pauses therebetween |
| US7344609B2 (en) | 1998-09-03 | 2008-03-18 | U.I.T., L.L.C. | Ultrasonic impact methods for treatment of welded structures |
| US20080160337A1 (en) * | 2006-10-17 | 2008-07-03 | Rolls-Royce Plc | Component joining |
| US7431779B2 (en) | 1998-09-03 | 2008-10-07 | U.I.T., L.L.C. | Ultrasonic impact machining of body surfaces to correct defects and strengthen work surfaces |
| US20230108587A1 (en) * | 2021-10-04 | 2023-04-06 | General Electric Company | Backwall strike braze repair |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1322245A (en) * | 1919-11-18 | Method oe repairing cylinders | ||
| US1384456A (en) * | 1919-05-01 | 1921-07-12 | Zebulon J Eury | Method of repairing scored cylinders |
| US2301513A (en) * | 1941-04-08 | 1942-11-10 | Brewer Harry | Method of repairing cracked machine parts |
| US2351701A (en) * | 1941-11-11 | 1944-06-20 | Cecil J Perkins | Process and apparatus for spot-dyeing skeins |
| US2361106A (en) * | 1940-11-04 | 1944-10-24 | Charles A Jensen | Method of repairing and for preventing cracks in metal castings |
| US2369415A (en) * | 1943-10-05 | 1945-02-13 | Edgar B Sherman | Method of repairing cracked cylinder heads and blocks |
-
1946
- 1946-12-17 US US716691A patent/US2537533A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1322245A (en) * | 1919-11-18 | Method oe repairing cylinders | ||
| US1384456A (en) * | 1919-05-01 | 1921-07-12 | Zebulon J Eury | Method of repairing scored cylinders |
| US2361106A (en) * | 1940-11-04 | 1944-10-24 | Charles A Jensen | Method of repairing and for preventing cracks in metal castings |
| US2301513A (en) * | 1941-04-08 | 1942-11-10 | Brewer Harry | Method of repairing cracked machine parts |
| US2351701A (en) * | 1941-11-11 | 1944-06-20 | Cecil J Perkins | Process and apparatus for spot-dyeing skeins |
| US2369415A (en) * | 1943-10-05 | 1945-02-13 | Edgar B Sherman | Method of repairing cracked cylinder heads and blocks |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2711012A (en) * | 1949-09-13 | 1955-06-21 | Hal W Harman | Method of repairing cracked casting |
| US3445914A (en) * | 1966-04-18 | 1969-05-27 | Chrome Plate Inc | Method of repairing aircraft cylinder heads |
| US3464103A (en) * | 1967-07-13 | 1969-09-02 | Cleon B Harris | Method of repairing cracked metallic castings |
| US3487530A (en) * | 1967-10-09 | 1970-01-06 | Abex Corp | Method of repairing casting defects |
| EP0024142A1 (en) * | 1979-07-31 | 1981-02-25 | Chromalloy American Corporation | Method for repairing a crack in a superalloy material and an article when so repaired |
| US5050385A (en) * | 1982-10-06 | 1991-09-24 | Hitachi, Ltd. | Inner cylinder for a gas turbine combustor reinforced by built up welding |
| US4638743A (en) * | 1985-07-18 | 1987-01-27 | Railcar Specialties, Inc. | Method of reinforcing a covered hopper car hatch |
| US6003755A (en) * | 1997-02-20 | 1999-12-21 | Lockheed Martin Corp. | Method for repair welding aluminum-lithium alloys |
| US20060016858A1 (en) * | 1998-09-03 | 2006-01-26 | U.I.T., Llc | Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment |
| US20050145306A1 (en) * | 1998-09-03 | 2005-07-07 | Uit, L.L.C. Company | Welded joints with new properties and provision of such properties by ultrasonic impact treatment |
| US6171415B1 (en) | 1998-09-03 | 2001-01-09 | Uit, Llc | Ultrasonic impact methods for treatment of welded structures |
| US7431779B2 (en) | 1998-09-03 | 2008-10-07 | U.I.T., L.L.C. | Ultrasonic impact machining of body surfaces to correct defects and strengthen work surfaces |
| US7344609B2 (en) | 1998-09-03 | 2008-03-18 | U.I.T., L.L.C. | Ultrasonic impact methods for treatment of welded structures |
| US20040238508A1 (en) * | 2003-05-27 | 2004-12-02 | Rabinovich Joshua E. | Low heat input laser component repair or joining with feedstock having conforming surfaces with a substrate |
| US7600666B2 (en) * | 2003-05-27 | 2009-10-13 | Rabinovich Joshua E | Repair with feedstock having conforming surfaces with a substrate |
| US20050122915A1 (en) * | 2003-12-05 | 2005-06-09 | Yazaki Corporation | Communication apparatus |
| US7301123B2 (en) | 2004-04-29 | 2007-11-27 | U.I.T., L.L.C. | Method for modifying or producing materials and joints with specific properties by generating and applying adaptive impulses a normalizing energy thereof and pauses therebetween |
| US20080035627A1 (en) * | 2005-08-19 | 2008-02-14 | Uit L.L.C. | Oscillating system and tool for ultrasonic impact treatment |
| US7276824B2 (en) | 2005-08-19 | 2007-10-02 | U.I.T., L.L.C. | Oscillating system and tool for ultrasonic impact treatment |
| US20070040476A1 (en) * | 2005-08-19 | 2007-02-22 | U.I.T., Llc | Oscillating system and tool for ultrasonic impact treatment |
| US20070068605A1 (en) * | 2005-09-23 | 2007-03-29 | U.I.T., Llc | Method of metal performance improvement and protection against degradation and suppression thereof by ultrasonic impact |
| US20070244595A1 (en) * | 2006-04-18 | 2007-10-18 | U.I.T., Llc | Method and means for ultrasonic impact machining of surfaces of machine components |
| US20080160337A1 (en) * | 2006-10-17 | 2008-07-03 | Rolls-Royce Plc | Component joining |
| US8066173B2 (en) * | 2006-10-17 | 2011-11-29 | Rolls-Royce Plc | Component joining |
| US20230108587A1 (en) * | 2021-10-04 | 2023-04-06 | General Electric Company | Backwall strike braze repair |
| US11951557B2 (en) * | 2021-10-04 | 2024-04-09 | General Electric Company | Backwall strike braze repair |
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