Ring groove rivet for ultrasonic pre-tightening force detection and in-service detection method
A ring groove rivet, ultrasonic technology, applied in the direction of rivet, force/torque/work measuring instrument, torque/torsion force measurement during tightening, etc., can solve the problem that the measurement accuracy cannot meet the needs, the calibration and measurement process is complicated, and it is not practical. , to achieve the effect of eliminating measurement errors, eliminating the influence of measurement accuracy, and improving measurement accuracy
Pending Publication Date: 2020-11-27
MEISHAN CRRC FASTENING SYST CO LTD
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The calibration and measurement process of the method used in this application is complicated, and the measurement accuracy of the ring groove rivet with the ring attachment structure cannot meet the needs, and it cannot be practical for the measurement of more complicated ring groove rivets
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The present invention is further described below in conjunction with specific embodiment, and specific embodiment is the further description of the principle of the present invention, does not limit the present invention in any way, and the identical or similar technology of the present invention all does not exceed the scope of protection of the present invention.
[0025] In conjunction with the accompanying drawings.
[0026] Such as figure 1 , figure 2 and image 3 shown.
[0027] The ring groove rivet 1 used for ultrasonic pretightening force detection in the present invention is composed of a riser 101, a polished rod 102, a locking groove 103 and a short tail tooth 104; the top surface of the ring groove rivet riser 101 is fixed by bonding an ultrasonic piezoelectric wafer 105, A reflector is arranged at the junction of the polished rod and the locking groove. The reflector in this example is the reflective hole 106 .
[0028] The reflector of the present i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Round hole diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a ring groove rivet for ultrasonic pre-tightening force detection and an in-service detection method. The ring groove rivet is composed of a cap, a polish rod, a locking grooveand a short tail tooth. An ultrasonic piezoelectric wafer is fixed to the top face of the ring groove rivet cap through bonding, and a reflector is arranged at the junction of the polish rod and thelocking groove. The detection method comprises the following steps of: calibrating a ring groove rivet; obtaining the polish rod diameter of the calibrated rivet, the rivet cap thickness, the distancefrom the end face of the rivet cap to a reflection hole, the ultrasonic wave transition time and the temperature in the initial state; carrying out riveting calibration on the ring groove rivet, andacquiring the pre-tightening force and ultrasonic transition time after riveting; establishing a pre-tightening force-transition time difference model, and determining a calibration coefficient; and obtaining the in-service pre-tightening force of the ring groove rivet through the relation model. The method can be used for ultrasonic pre-tightening force in-service detection, the calibration and measurement process is simplified by prefabricating the reflection hole, meanwhile, the influence of a lantern ring on the measurement precision is eliminated, and the measurement precision is improved.
Description
technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a ring groove rivet used for ultrasonic pretightening force detection and an in-service detection method. Background technique [0002] As a special fastener, ring groove rivets have been widely used in industrial applications. Preload is an important performance index of ring groove rivets. In industrial structure design and testing, in order to ensure the rationality and reliability of the connection design, it is necessary to accurately measure the size of the preload in the connection structure. The most commonly used method of existing detection technology is the strain gauge test method, that is, the stress is tested by pasting the strain gauge on the shank of the ring groove rivet. The measurement result of this method is only the stress on the rivet surface, and the internal stress of the rivet body cannot be detected, and It is easily affected by external f...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01L5/24F16B19/04
CPCF16B19/04G01L5/246
Inventor 左世斌赵祥云何旭董帅张钦邓涛贾云龙王仕柏王旺兵万永张小连
Owner MEISHAN CRRC FASTENING SYST CO LTD