US2663928A - Process for machining porous metals - Google Patents
Process for machining porous metals Download PDFInfo
- Publication number
- US2663928A US2663928A US173680A US17368050A US2663928A US 2663928 A US2663928 A US 2663928A US 173680 A US173680 A US 173680A US 17368050 A US17368050 A US 17368050A US 2663928 A US2663928 A US 2663928A
- Authority
- US
- United States
- Prior art keywords
- metal
- machining
- oxalic acid
- porous metals
- cooling
- 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
- 229910052751 metal Inorganic materials 0.000 title claims description 20
- 239000002184 metal Substances 0.000 title claims description 20
- 238000003754 machining Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 7
- 150000002739 metals Chemical class 0.000 title description 5
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 33
- 235000006408 oxalic acid Nutrition 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 101150036449 SIRPA gene Proteins 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 210000004914 menses Anatomy 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B23P25/00—Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- 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
- Y10T29/49636—Process for making bearing or component thereof
- Y10T29/49703—Sealing
-
- 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
- Y10T29/4981—Utilizing transitory attached element or associated separate material
- Y10T29/49812—Temporary protective coating, impregnation, or cast layer
-
- 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
- Y10T29/49995—Shaping one-piece blank by removing material
Definitions
- Figure 4 illustrates the blank of Figure 1 after it has been impregnated and Figure 5 is the blank of Figure 4 after it has been machined.
- sodium chloride or other metallic salts e. g., potassium chloride, or a eutectic mixture of salts such as required.
- oxalic acid a ween ZOO-260 F. is sufficient.
- machining, shaping, milling, grinding, drill- .ng or other operations may be carried on in the usual way. It is essential that sharp tools be used and heavy cuts avoided. No cutting compounds should be used..
- the filler may be removed from the specimen by dissolving in water or by the use of steam.
- Oxalic acid decomposes at 125 0., maybe removed by heattemperature be- It should be noted that when; sodium chloride or other salt Whose melting pOint-ishigher than that of soft or silver solder is usedrthe impregnated porous material may be soldered toa solid, section of metal.
- a method of protecting the porosity of metals machined for use in sweat-cooling apparatus which comprises, filling the pores of said metal with fluid oxalic acid at a temperature between 200-260" F., cooling the said metal whereby the oxalic acid solidifies Within the pores thereof to present a solid surface for machining, machining said metal, andremoving the said oxalic acid from the-pores of said metal by heating after machining.
- a method of preserving the porosity of porous metals to be machined for use in sweatcooling apparatus which comprises, submerging the metal in a molten bath of oxalic acid for 20 minutes and .with' a between ZOO-260 R, cooling the impregnated metal to present a smoothsurface for machining, machining said metal, and dissolving the impregnating material from the pores of the metal after machining, with heat at C.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Description
IMPREGNA TED H. L. WHEELER, JR
PROCESS FOR MACHINING POROUS METALS Filed July 13, 1950 M 14C Hl/VED JNVENTOR. -Wha E 1 e 1", LT n nr'raz/vs rs W m a Dec. 29, 1953 Hurry L BY m T M e h P m MHCf/l/VED BL ANK NOT IMPEEGNHTED BL ANK IMPREGNH TED Patented Dec. 29, 1953 PROCESS FOR MACHINING POROUS METALS Harry Lindsay Wheeler,
assignor to the United represented by the Seer Application July 13, 1950, Serial No.
mense quantities of heat, thus the metal wall is isolated from the region of intense heat and is protected against burn-out. This phenomenon known in the art as sweat-cooling Jr., La
etary of the Canada, Calif., of America as Army States materials such as stainless steel, and chromium, nickel, and olybdenum alloys in general, which are essentially noncorrosive, cannot be etched satisfactorily. My method eliminates these dise usual machining operations to be employed without destroying the porosity of the stock.
It is a broad Without porosity thereof.
It is a still more specific object of my invenon to provide mat wherein: is a porous metal blank, not impregspecification and Figure 1 nated.
line 2-2 of Figure 1. blank not impregnated,
Figure 4 illustrates the blank of Figure 1 after it has been impregnated and Figure 5 is the blank of Figure 4 after it has been machined.
In carrying out of other solvents.
have found that sodium chloride or other metallic salts (e. g., potassium chloride, or a eutectic mixture of salts such as required. With oxalic acid, a ween ZOO-260 F. is sufficient. After the porous naterial is impregnated and allowed to cool in air, machining, shaping, milling, grinding, drill- .ng or other operations may be carried on in the usual way. It is essential that sharp tools be used and heavy cuts avoided. No cutting compounds should be used..
After the machining operations, the filler may be removed from the specimen by dissolving in water or by the use of steam. Oxalic acid, decomposes at 125 0., maybe removed by heattemperature be- It should be noted that when; sodium chloride or other salt Whose melting pOint-ishigher than that of soft or silver solder is usedrthe impregnated porous material may be soldered toa solid, section of metal.
Fahrenheit, cooling the said metal whereby the said oxalic acid solidifies. metal, and removing the said oxalic acid by heat: ing.
described above 2. A method of protecting the porosity of metals machined for use in sweat-cooling apparatus which comprises, filling the pores of said metal with fluid oxalic acid at a temperature between 200-260" F., cooling the said metal whereby the oxalic acid solidifies Within the pores thereof to present a solid surface for machining, machining said metal, andremoving the said oxalic acid from the-pores of said metal by heating after machining.
3. A method of preserving the porosity of porous metals to be machined for use in sweatcooling apparatus which comprises, submerging the metal in a molten bath of oxalic acid for 20 minutes and .with' a between ZOO-260 R, cooling the impregnated metal to present a smoothsurface for machining, machining said metal, and dissolving the impregnating material from the pores of the metal after machining, with heat at C.
HARRY LINDSAY WHEELER, JR.
in the filel of this patent J'NITED STATES PATENTS Number Name Date 1,683,437 Batie Sept. 4, 1928 2,047,555 Gardner July 14, 1936 2,159,391 Martin et a1 May 23, 1939 2,304,166 Hatfield Dec. 8, 1942 2,446,672 Sirp Aug. 10, 1948 2,462,045 Wulfi Feb. 15, 1949 FOREXGN PATENTS Number Country Date 455,077 Great Britain Oct. 13, 1936
Claims (1)
1. A METHOD OF MACHINING A POROUD METAL FOR USE IN SWEAT-COOLING APPARATUS WHICH COMPRISES FILLING THE PORES OF THE SAID METAL WITH FLUID OXALIC ACID AT A TEMPERATURE BETWEEN 200-260 DEGREES FAHRENHEIT, COOLING THE SAID METAL WHEREBY THE SAID OXALIC ACID SOLIDIFES, MACHINING THE SAID METAL, AND REMOVING THE SAID OXALIC ACID BY HEATING.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US173680A US2663928A (en) | 1950-07-13 | 1950-07-13 | Process for machining porous metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US173680A US2663928A (en) | 1950-07-13 | 1950-07-13 | Process for machining porous metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2663928A true US2663928A (en) | 1953-12-29 |
Family
ID=22633059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US173680A Expired - Lifetime US2663928A (en) | 1950-07-13 | 1950-07-13 | Process for machining porous metals |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2663928A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2765524A (en) * | 1953-09-09 | 1956-10-09 | Rensselaer Polytech Inst | Method of making a porous element |
| US2897097A (en) * | 1955-08-04 | 1959-07-28 | Bunting Brass & Bronze Co | Process of preparing porous sintered metal parts for metal plating |
| US2916814A (en) * | 1956-01-21 | 1959-12-15 | Philips Corp | Manufacture of porous articles of predetermined shape and dimensions from high-melting-point metals |
| US2936519A (en) * | 1956-03-28 | 1960-05-17 | M O Valve Co Ltd | Manufacture of interdigital metal structures |
| US2986810A (en) * | 1959-02-11 | 1961-06-06 | Continental Can Co | Production of composite metal stock having internal channels |
| US2986799A (en) * | 1957-01-03 | 1961-06-06 | Philips Corp | Method of making cathodes |
| US2988809A (en) * | 1956-10-08 | 1961-06-20 | North American Aviation Inc | Fabrication procedure for parts having low density core |
| US3017696A (en) * | 1957-03-11 | 1962-01-23 | Griscom Russell Co | Corrosion-resistant surface |
| US3110085A (en) * | 1957-12-11 | 1963-11-12 | Gen Electric | Method of making self-lubricating bearings |
| US3175927A (en) * | 1961-10-25 | 1965-03-30 | Gen Electric | Reconstituted micaceous products |
| US3195226A (en) * | 1962-06-13 | 1965-07-20 | Olin Mathieson | Manufacture of composite bodies utilizing liquid soluble material to maintain porosity |
| US3201858A (en) * | 1962-06-14 | 1965-08-24 | Olin Mathieson | Method of making a composite porous metal structure |
| US3224071A (en) * | 1960-03-14 | 1965-12-21 | Philips Corp | Brazing method for porous bodies |
| US3231341A (en) * | 1960-05-26 | 1966-01-25 | Iit Res Inst | Metal-plastic article |
| US3230618A (en) * | 1962-06-14 | 1966-01-25 | Olin Mathieson | Metal fabrication |
| US3308530A (en) * | 1964-03-12 | 1967-03-14 | Philips Corp | Method of controlling porosity of refractory metal structures |
| US3351499A (en) * | 1962-10-18 | 1967-11-07 | Westinghouse Electric Corp | Oil impregnated thermoelectric element with electroplated metal contact and method of producing same |
| WO1979000821A1 (en) * | 1978-03-23 | 1979-10-18 | H Eichhorn | Machine finishing of porous materials |
| US4491500A (en) * | 1984-02-17 | 1985-01-01 | Rem Chemicals, Inc. | Method for refinement of metal surfaces |
| DE3813711A1 (en) * | 1987-04-23 | 1988-11-17 | Nippon Denso Co | METHOD AND DEVICE FOR FINISHING ITEMS WITH RILLED ITEMS |
| GB2236699A (en) * | 1989-09-28 | 1991-04-17 | United Technologies Corp | Component protection from contaminants |
| GB2253173A (en) * | 1991-03-01 | 1992-09-02 | Aerospace Systems & Tech | Process for the mechanical treatment of porous sheet materials |
| GB2382539A (en) * | 2001-11-28 | 2003-06-04 | Alstom | Improved method of manufacture for hollow components |
| US20040001656A1 (en) * | 2002-03-27 | 2004-01-01 | Noriyuki Yoshimura | Sintered bearing and production method therefor |
| US20120163982A1 (en) * | 2010-12-27 | 2012-06-28 | Edward Claude Rice | Airfoil, turbomachine and gas turbine engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1683437A (en) * | 1927-06-13 | 1928-09-04 | Kelsey Wheel Company Inc | Method of forming drawn articles |
| US2047555A (en) * | 1933-05-31 | 1936-07-14 | Parsons & Co Ltd C A | Manufacture of hollow turbine blades |
| GB455077A (en) * | 1936-03-25 | 1936-10-13 | Fritz Singer | Method of mechanically working metal articles |
| US2159391A (en) * | 1935-05-07 | 1939-05-23 | North American Rayon Corp | Process for polishing of spinnerettes |
| US2304166A (en) * | 1940-08-13 | 1942-12-08 | Nat Carbon Co Inc | Method of producing machined carbon articles |
| US2446672A (en) * | 1944-07-26 | 1948-08-10 | Western Electric Co | Method of machining article blanks |
| US2462045A (en) * | 1942-04-04 | 1949-02-15 | Wulff John | Method of producing filters |
-
1950
- 1950-07-13 US US173680A patent/US2663928A/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1683437A (en) * | 1927-06-13 | 1928-09-04 | Kelsey Wheel Company Inc | Method of forming drawn articles |
| US2047555A (en) * | 1933-05-31 | 1936-07-14 | Parsons & Co Ltd C A | Manufacture of hollow turbine blades |
| US2159391A (en) * | 1935-05-07 | 1939-05-23 | North American Rayon Corp | Process for polishing of spinnerettes |
| GB455077A (en) * | 1936-03-25 | 1936-10-13 | Fritz Singer | Method of mechanically working metal articles |
| US2304166A (en) * | 1940-08-13 | 1942-12-08 | Nat Carbon Co Inc | Method of producing machined carbon articles |
| US2462045A (en) * | 1942-04-04 | 1949-02-15 | Wulff John | Method of producing filters |
| US2446672A (en) * | 1944-07-26 | 1948-08-10 | Western Electric Co | Method of machining article blanks |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2765524A (en) * | 1953-09-09 | 1956-10-09 | Rensselaer Polytech Inst | Method of making a porous element |
| US2897097A (en) * | 1955-08-04 | 1959-07-28 | Bunting Brass & Bronze Co | Process of preparing porous sintered metal parts for metal plating |
| US2916814A (en) * | 1956-01-21 | 1959-12-15 | Philips Corp | Manufacture of porous articles of predetermined shape and dimensions from high-melting-point metals |
| US2936519A (en) * | 1956-03-28 | 1960-05-17 | M O Valve Co Ltd | Manufacture of interdigital metal structures |
| US2988809A (en) * | 1956-10-08 | 1961-06-20 | North American Aviation Inc | Fabrication procedure for parts having low density core |
| US2986799A (en) * | 1957-01-03 | 1961-06-06 | Philips Corp | Method of making cathodes |
| US3017696A (en) * | 1957-03-11 | 1962-01-23 | Griscom Russell Co | Corrosion-resistant surface |
| US3110085A (en) * | 1957-12-11 | 1963-11-12 | Gen Electric | Method of making self-lubricating bearings |
| US2986810A (en) * | 1959-02-11 | 1961-06-06 | Continental Can Co | Production of composite metal stock having internal channels |
| US3224071A (en) * | 1960-03-14 | 1965-12-21 | Philips Corp | Brazing method for porous bodies |
| US3231341A (en) * | 1960-05-26 | 1966-01-25 | Iit Res Inst | Metal-plastic article |
| US3175927A (en) * | 1961-10-25 | 1965-03-30 | Gen Electric | Reconstituted micaceous products |
| US3195226A (en) * | 1962-06-13 | 1965-07-20 | Olin Mathieson | Manufacture of composite bodies utilizing liquid soluble material to maintain porosity |
| US3201858A (en) * | 1962-06-14 | 1965-08-24 | Olin Mathieson | Method of making a composite porous metal structure |
| US3230618A (en) * | 1962-06-14 | 1966-01-25 | Olin Mathieson | Metal fabrication |
| US3351499A (en) * | 1962-10-18 | 1967-11-07 | Westinghouse Electric Corp | Oil impregnated thermoelectric element with electroplated metal contact and method of producing same |
| US3308530A (en) * | 1964-03-12 | 1967-03-14 | Philips Corp | Method of controlling porosity of refractory metal structures |
| WO1979000821A1 (en) * | 1978-03-23 | 1979-10-18 | H Eichhorn | Machine finishing of porous materials |
| US4491500A (en) * | 1984-02-17 | 1985-01-01 | Rem Chemicals, Inc. | Method for refinement of metal surfaces |
| DE3813711A1 (en) * | 1987-04-23 | 1988-11-17 | Nippon Denso Co | METHOD AND DEVICE FOR FINISHING ITEMS WITH RILLED ITEMS |
| DE3813711C2 (en) * | 1987-04-23 | 1998-03-26 | Denso Corp | Process and device for finishing collector blanks |
| US5283020A (en) * | 1989-09-28 | 1994-02-01 | United Technologies Corporation | Component protection from contaminants |
| GB2236699A (en) * | 1989-09-28 | 1991-04-17 | United Technologies Corp | Component protection from contaminants |
| GB2236699B (en) * | 1989-09-28 | 1993-08-25 | United Technologies Corp | Component proctection from contaminants |
| DE4030016C2 (en) * | 1989-09-28 | 2001-01-18 | United Technologies Corp | Method for preventing machining residues in objects to be machined and object protected by the method |
| GB2253173B (en) * | 1991-03-01 | 1994-06-22 | Aerospace Systems & Tech | Process for the mechanical treatment of porous sheet materials |
| US5333415A (en) * | 1991-03-01 | 1994-08-02 | Aerospace Systems & Technologies Ltd. | Process for sealing a perforated web material |
| EP0501754A1 (en) * | 1991-03-01 | 1992-09-02 | Aerospace Systems And Technologies Ltd | Process for the mechanical treatment of porous sheet materials |
| GB2253173A (en) * | 1991-03-01 | 1992-09-02 | Aerospace Systems & Tech | Process for the mechanical treatment of porous sheet materials |
| GB2382539A (en) * | 2001-11-28 | 2003-06-04 | Alstom | Improved method of manufacture for hollow components |
| GB2382539B (en) * | 2001-11-28 | 2003-10-22 | Alstom | Improved method of manufacture for hollow components |
| US20040001656A1 (en) * | 2002-03-27 | 2004-01-01 | Noriyuki Yoshimura | Sintered bearing and production method therefor |
| US6951423B2 (en) * | 2002-03-27 | 2005-10-04 | Minebea Co., Ltd. | Sintered bearing and production method therefor |
| US20120163982A1 (en) * | 2010-12-27 | 2012-06-28 | Edward Claude Rice | Airfoil, turbomachine and gas turbine engine |
| US9004873B2 (en) * | 2010-12-27 | 2015-04-14 | Rolls-Royce Corporation | Airfoil, turbomachine and gas turbine engine |
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