Quality evaluation method for self-piercing riveting joint
A quality evaluation, self-piercing riveting technology, applied in the direction of measuring devices, using wave/particle radiation, material analysis using wave/particle radiation, etc., can solve the problem that the detection results are not intuitive enough, the guiding significance is not strong, and the online detection system is complex, etc. problem, to avoid too small bottom thickness T, increase the length of inner lock, and improve the quality of riveted parts
Inactive Publication Date: 2019-06-14
DONGFENG MOTOR CORP HUBEI
View PDF7 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The existing quality evaluation methods for self-piercing riveted joints are mainly through online detection. This method is efficient and can quickly diagnose the quality of riveted joints in real time. However, the online detection system is complex and belongs to non-destructive detection, and the detection results are not intuitive enough. The guiding significance of analyzing the causes of poor riveting quality and improving joint quality is not strong
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
[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] The quality evaluation method for self-piercing riveted joints of the present invention comprises the following steps:
[0028] S1. Cross-section detection of riveted joints: Cut the riveted joints along the central axis by wire cutting method, such as figure 1 As shown, after grinding and polishing the cut surface, use an electron microscope to observe the cross section of the joint, and measure the three important cross-sectional dimensions that affect the quality of the joint: the inner lock length L, the bottom thickness T and the nail head height H. Such as figure 2 As shown, the inner lock length L is the horizontal distance from the outer edge of the leg of the rivet 1 to the lower edge of the upper plate 2 cut by the rivet, and the bottom thickness T is the axial thickness from the tip of the leg of the rivet 1 to the...
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
Login to View More Abstract
The invention discloses a quality evaluation method for a self-piercing riveting joint. The evaluation method comprises the following steps: sectioning the riveting joint along a center axis by usinglinear cutting, after grinding and polishing a sectioning face, measuring an inner lock length L, a bottom thickness value T and a pin height h of the sectioned section, and evaluating the joint quality according to the measured size. Through the evaluation method disclosed by the invention, the joint quality can be directly and reliably evaluated, the evaluation result is high in precision, and can be used as the analytic standard for the bad riveting quality reason, and the method has significance for improving the joint reliability and production efficiency.
Description
technical field [0001] The invention relates to the field of self-piercing riveting, in particular to a quality evaluation method for self-piercing riveting joints. Background technique [0002] Self-piercing riveting is a mechanical connection process. Under the push of the punch, the rivet pierces the upper layer of material. interlocking purpose. Self-piercing riveting has the characteristics of high connection strength, no thermal deformation, environmental protection and low consumption, and is the main connection technology in aluminum body. The quality of its joints is mainly affected by various process parameters such as rivets, molds, riveting equipment, and materials to be connected, and quality problems such as falling off and insufficient strength are prone to occur. Therefore, it is of great significance to evaluate the riveting quality to improve joint reliability and production efficiency. [0003] The existing quality evaluation methods for self-piercing r...
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 Patent Type & Authority Applications(China)
IPC IPC(8): G01B15/00G01B15/02G01N23/00
Inventor 史建鹏王慧李洪涛王希诚石朝亮
Owner DONGFENG MOTOR CORP HUBEI