| 摘要 |
#CMT# #/CMT# The method involves optically detecting an actual form (16) of elements (2, 3) e.g. nuts, of a screw connection (1) resulting from a pretensioning force, where the element (2) is designed as connecting nut. The actual force is compared with a computed reference-form (15) of a screw connection model i.e. bending bar model. An evaluation is performed using fuzzy logic and/or an implication list to determine whether the pretensioning force lies within predetermined tolerances based on the comparison. #CMT# : #/CMT# An independent claim is also included for a device for evaluating pretensioning force of a screw connection between an injector body and a connecting nut. #CMT#USE : #/CMT# Method for evaluating pretensioning force of a screw connection between an injector body and a connecting nut of a fuel injector i.e. common-rail-injector. #CMT#ADVANTAGE : #/CMT# The evaluation performed optically concerns a contactless measurement principle with which the screw connection is loosened, thus avoiding destruction or maladjustment of the screw connection, and hence enabling evaluation of quality of the screw connection without affecting function of the screw connection. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view illustrating operational sequence of evaluation of screw connection quality of a screw connection. 1 : Screw connection 2, 3 : Elements 4-9 : Spanner surfaces 15 : Computed reference-form 16 : Actual form. |
