Method and tool for setting blind rivet elements
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-009/05
B21J-015/02
B23P-011/00
B21J-015/28
B25B-027/00
B21J-015/10
B21J-015/04
출원번호
US-0810574
(2011-08-24)
등록번호
US-9682419
(2017-06-20)
우선권정보
DE-10 2010 035 613 (2010-08-26)
국제출원번호
PCT/DE2011/001652
(2011-08-24)
§371/§102 date
20130403
(20130403)
국제공개번호
WO2012/025102
(2012-03-01)
발명자
/ 주소
Schmidt, Heiko
출원인 / 주소
Schmidt, Heiko
대리인 / 주소
Welsh Flaxman & Gitler LLC
인용정보
피인용 횟수 :
1인용 특허 :
14
초록▼
A method for setting blind rivet elements in which the setting of the respective blind rivet element introduced into a pre-hole of the work piece and/or the formation of a rivet collar takes place in a setting stroke (SH) through the permanent deformation of a section of the blind rivet element by s
A method for setting blind rivet elements in which the setting of the respective blind rivet element introduced into a pre-hole of the work piece and/or the formation of a rivet collar takes place in a setting stroke (SH) through the permanent deformation of a section of the blind rivet element by subjecting an end of the blind rivet element to a traction force by a traction element of a setting tool while simultaneously supporting another end of the blind rivet element on a support part of the setting tool counter to the traction force.
대표청구항▼
1. A method for setting a blind rivet nut comprising a rivet flange and a rivet body introduced into a pre-hole in a work piece, wherein the blind rivet nut is spun in a traction mandrel of a setting tool and the formation of a rivet collar takes place in a setting stroke through permanent deformati
1. A method for setting a blind rivet nut comprising a rivet flange and a rivet body introduced into a pre-hole in a work piece, wherein the blind rivet nut is spun in a traction mandrel of a setting tool and the formation of a rivet collar takes place in a setting stroke through permanent deformation of a section of the rivet body of the blind rivet nut, the method comprising the steps of: subjecting an end of the blind rivet nut to a traction force by the traction mandrel of the setting tool while simultaneously supporting the rivet flange of the blind rivet nut on a tool head of the setting tool counter to the traction force, in which prior to forming the rivet collar, a distance is detected between the rivet flange of the blind rivet nut and the tool head of the setting tool is, and comparing the a detected distance between the rivet flange of the blind rivet nut and the tool head with a predefined tolerance range, a setting process of the blind rivet nut is continued in case of the detected distance being smaller than the predefined tolerance range and in case of the detected distance being greater than the predefined tolerance range the setting process is interrupted, wherein during initiation of the setting process, in a detection phase prior to the formation of the rivet collar by the setting stroke, an auxiliary force is exerted on the traction mandrel, such that the auxiliary force is not sufficient for forming the rivet collar. 2. The method according to claim 1, wherein during the detection phase a relative movement between the traction mandrel and the support part is detected as a pre-stroke, and stopping or interruption of the setting process then takes place when the pre-stroke exceeds a pre-defined tolerance range. 3. The method according to claim 2, wherein the pre-stroke is detected by a position sensor or that stopping or interruption of the setting process is effected or caused by at least one electric switch, which is activated in the event of a pre-stroke exceeding a pre-defined tolerance range. 4. The method according to claim 2, wherein in the detection phase, a traction mandrel drive formed by at least one piston-cylinder arrangement is subjected temporarily at least one time to a full operating pressure of a pneumatic or hydraulic pressure medium also used for setting and the pre-stroke triggered by this is determined by a position sensor, by a position measuring system or by measuring a pressure occurring after a momentary pressurization in the at least one piston-cylinder arrangement. 5. The method according to claim 2, wherein in the detection phase a traction mandrel drive made up of at least one piston-cylinder arrangement forming the drive is subjected to an operating pressure of a pneumatic or hydraulic pressure medium until reaching a pressure or a traction force acting on the traction mandrel that is below a traction force needed for forming the rivet collar, and that in this connection the pre-stroke is determined and the pressure in the at least one piston-cylinder arrangement forming the traction mandrel drive is monitored-by at least one sensor measuring a pressure of the pneumatic or hydraulic pressure medium or by a load cell or a strain gauge, which determines the pressure or the force between the traction mandrel drive and the support part. 6. The method according to claim 5, wherein the correction of the setting stroke takes place by an automatic or motorized setting of at least one stop defining a size of the setting stroke. 7. The method according to one of the claim 5, wherein the correction of the setting stroke takes place by the setting stroke being monitored with a position sensor, or by monitoring of the force or of the pressure exerted on the traction mandrel drive by a piston-cylinder arrangement forming the traction mandrel. 8. The method according to claim 2, wherein taking into account the pre-stroke determined in the detection phase, a correction of the setting stroke for setting the blind rivet nut takes place in a form that a size of the pre-stroke is added at least to a partial extent to an initial setting stroke, which is pre-defined by a type of blind rivet nut to be processed and by a type of work pieces and by a thickness of the work pieces. 9. The method according to claim 8, wherein the correction of the setting stroke takes place when the pre-stroke does not exceed a pre-defined tolerance range, which ensures engagement of the traction mandrel drive in an inner thread of the blind rivet nut with sufficient axial length and that upon exceeding a tolerance range, the setting process is stopped or interrupted. 10. A method for setting a blind rivet nut comprising a rivet flange and a rivet body introduced into a pre-hole in a work piece, wherein the setting of the blind rivet nut introduced into the pre-hole of the work piece and screwed by an inner thread onto a thread of a traction mandrel of a riveting tool takes place on a tool head of the a setting tool in a setting stroke, the method comprising the steps of: applying a traction force to the traction mandrel while simultaneously supporting an end of a blind rivet nut at a distance from an inner thread and forming a rivet collar by permanent deformation of a section of the rivet body of the blind rivet nut, whereby prior to forming the rivet collar, a distance between the rivet flange of the blind rivet nut spinning on the traction mandrel and the tool head is detected, and based on the distance detected, a setting process is continued in a case of correct spinning on the traction mandrel or in a case of incorrect spinning on the traction mandrel the setting process is discontinued wherein during initiation of the setting process, in a detection phase prior to the formation of the rivet collar by the setting stroke, an auxiliary force is exerted on the traction mandrel, such that the auxiliary force is not sufficient for forming the rivet collar.
Weber Richard G. (Ridgefield CT) Blake Jeffrey T. (Milford CT) O\Connor William E. (Waterton CT) Smart Charles F. (Brookfield CT), Blind rivet setting system and method for setting a blind rivet then verifying the correctness of the set.
Weeks ; Jr. Arthur R. (Waterbury CT) D\Aquila Anthony (Trumbull CT) Schwartz Sidney D. (Hamden CT) Varian Raymond H. (Danbury CT) Viscio Donald (Danbury CT), Method and apparatus for automatically installing mandrel rivets.
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