Claims
- 1. A method for preventing during setting cold welding between a rivet sleeve having a settable head and a conical rivet shaft having a pulling end and a setting end for setting said settable head of said rivet sleeve, comprising the following steps, said conical rivet shaft causing increasing radial compression forces during said setting of said settable head:
- (a) making at least one of said rivet sleeve with its settable head and said conical rivet shaft of a material selected from the group consisting of aluminum, titanium and alloys of aluminum and titanium, whereby a tendency of cold welding exists between said rivet sleeve and said conical rivet shaft,
- (b) providing said conical rivet shaft with round grooves extending around said conical rivet shaft,
- (c) filling said round grooves in said conical rivet shaft with a curable adhesive that has not yet been cured so that said adhesive can function as a lubricant when said conical rivet shaft is pulled for setting said settable head of said rivet sleeve,
- (d) inserting said conical rivet shaft into said rivet sleeve and pulling said conical rivet shaft for setting said settable head before said curable adhesive cures so that said curable adhesive acts as a sliding enhancer or lubricant to prevent said cold welding, and
- (e) curing said curable adhesive for forming a seal and an adhesive bond between said rivet sleeve and said conical rivet shaft, wherein said curable adhesive functions as a lubricant prior to curing and as a seal and a bond after curing.
- 2. The method of claim 1, further comprising enclosing said curable adhesive and a curing agent in separate microcapsules, filling said microcapsules into said round grooves and destroying said microcapsules at the beginning of said pulling of said conical rivet shaft for permitting said curable adhesive to function as a lubricant and mix with said curing agent, and then causing curing of said curable adhesive.
- 3. The method of claim 1, further comprising enclosing a curing agent in microcapsules, mixing said curable adhesive with said microcapsules having said curing agent therein, and destroying said microcapsules at the beginning of said pulling of said conical rivet shaft for causing first a lubrication and then curing.
- 4. The method of claim 1, further comprising enclosing said curable adhesive in microcapsules, mixing a curing agent with said microcapsules, and destroying said microcapsules at the beginning of said pulling of said conical rivet shaft for causing first a lubrication and then curing.
Priority Claims (1)
Number |
Date |
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Kind |
41 31 030.6 |
Sep 1991 |
DEX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation in part application of our application U.S. Ser. No. 08/113,502; filed Aug. 27, 1993, now U.S. Pat. No. 5,375,953, which is an FWC of parent application U.S. Ser. No. 07/946,179; filed Sep. 16, 1992, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2348754 |
Apr 1975 |
DEX |
1370002 |
Oct 1974 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Standard ABS0219, pp. 1 and 2; Issue Sep. 1982 Revision 1, Jan. 1984. |
Standard No.: NAS 1921, 2 pgs., Aerospace Industries Association of America, Inc. |
Continuations (1)
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Number |
Date |
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Parent |
946179 |
Sep 1992 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
113502 |
Aug 1993 |
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