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公开(公告)号：CA1192387A
公开(公告)日：1985-08-27
申请号：CA409536
申请日：1982-08-16
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NEAL JAMES W , LOERSCH JOSEPH F
Abstract: Shot peening of thin edges of workpieces which are subject to deformation damage by direct impacts is accomplished by rotating the workpiece edge near centerline through a particular angle measured from the nor mal to the shot streamline. The angle is sufficient to cause oblique blows on the centerline of the edge, but insufficient to cause direct impacts. Compressive stresses by the oblique blows provide residual compressive stresses along the centerline to the desired depth. The angle is calcuable from the edge radius, the depth of stressing desired at the centerline, and the depth of stressing produced by shot at a reference location. Oscillatory rotation is preferably used to obtain even peening.
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公开(公告)号：FR2562827B1
公开(公告)日：1988-02-19
申请号：FR8503732
申请日：1985-03-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JORDAN LESTER W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
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公开(公告)号：CA1093268A
公开(公告)日：1981-01-13
申请号：CA265018
申请日：1976-11-05
Applicant: UNITED TECHNOLOGIES CORP
Inventor： LOERSCH JOSEPH F , HURWITZ PETER A , JORDAN LESTER W
Abstract: This invention involves a method for the hoe isostatic compaction of particulate material into an article of intricate configuration. It comprises providing a removable pattern in the appropriate precompaction configuration of the article to be produced, coating the pattern with a first layer of conductive material and a second layer of metallic material, the two layers cooperating to provide a self-supporting and gas-impervious shell around the pattern and removing the pattern from the shell to provide a self-supporting and gas-impervious container having an internal configuration corresponding to the precompaction shape of the article to be produced. The container is then filled with particulate material, evacuated ant sealed, and isostatically compacted in a pressure vessel at elevated temperature until the particulate material is compacted into a dense article of complex shape. The container is thereafter removed to obtain the compacted article. Dense articles of complex shape, such as gas turbine engine components including blades, discs and the like, are readily produced by the method of the invention.
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公开(公告)号：GB2157608B
公开(公告)日：1987-07-08
申请号：GB8507106
申请日：1985-03-19
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JORDAN LESTER W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
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公开(公告)号：GB2157608A
公开(公告)日：1985-10-30
申请号：GB8507106
申请日：1985-03-19
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JORDAN LESTER W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
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Patent Agency Ranking
公开(公告)号：CA1196486A
公开(公告)日：1985-11-12
申请号：CA410157
申请日：1982-08-26
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NEAL JAMES W , LOERSCH JOSEPH F
IPC: C21D7/06
Abstract: Method for Simultaneous Peening and Smoothing A method for simultaneously shot peening and smoothing includes use of relatively large, smooth, hard, spherical steel shot having a substantially uniform diameter in the range 1-2.5 mm. Titanium workpieces are provided in one step with a compressive stress layer of the order of 0.13 mm. and a surface finish of better than 15 x 10 6 inch AA, compared to conventional peened finishes of the order of 40 x 10-6 inch AA. Surface finish and peening intensity are interrelated and dependent on shot diameter, mass, velocity, and energy within relatively small limits. The shot diameter is uniform within ? 0.05 mm; the shot impact velocity is uniform within ? 4 percent or less, in the range 1.4-12 m/s. The method is also applied to the simultaneous densification and smoothing of overlay coatings on workpieces, such as those deposited by physical vapor deposition and plasma spraying. Usually heat treatment follows the peening step.
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公开(公告)号：FR2562827A1
公开(公告)日：1985-10-18
申请号：FR8503732
申请日：1985-03-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JORDAN LESTER W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
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公开(公告)号：CA1191672A
公开(公告)日：1985-08-13
申请号：CA409436
申请日：1982-08-13
Applicant: UNITED TECHNOLOGIES CORP
Inventor： LOERSCH JOSEPH F , NEAL JAMES W
Abstract: Shot Peening Apparatus In apparatus for shot peening, gravity is used to accelerate uniform sized steel shot, and thereby impart a combination of good surface finish and uniform compressive stresses to workpieces. It is especially useful for finishing gas turbine airfoils. Shot is introduced into the peening enclosure (28) through a gate (40) at near zero velocity. It is then accelerated along a streamline (31) toward the workpiece (18) with uniform velocity. The workpiece, positioned along the streamline, can be manipulated in three rotational modes: oscillatory rotation to uniformly peen contoured surfaces of a workpiece, periodic incremental rotation to peen different sides of a workpiece; and, tilting motion to enable peening of shoulders (22). The apparatus is especially suited to peening fragile workpieces such as gas turbine airfoils (18). A diverter plate (44) intercepts the shot stream at times when repositioning of a fragile workpiece is undertaken. Thus, possibly damaging impacts are avoided and steady state operation is able to be promptly resumed.
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公开(公告)号：DE3509475A1
公开(公告)日：1985-10-24
申请号：DE3509475
申请日：1985-03-15
Applicant: UNITED TECHNOLOGIES CORP
Inventor： JORDAN LESTER W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
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公开(公告)号：CA1158197A
公开(公告)日：1983-12-06
申请号：CA351880
申请日：1980-05-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NEAL JAMES W , LOERSCH JOSEPH F , ADINOLFI ROBERT G
Abstract: Disclosed is apparatus and method for electrochemically finishing the edges of airfoils and other thin edged objects. When the edge on an airfoil varies in thickness along its length, a tapered electrode is provided which has both a decreased diameter and increased spacing distance, providing a means for obtaining an edge with a radius proportioned to the thickness. Generally, in the system having an electrode with a unit surface area A, and with an electrode-workpiece surface spacing distance S, both A and S vary so that the ratio A/S is lowered for electrode portion proximate to edge portions having lowered thickness.
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