CN109883364A - A kind of quality evaluating method for self-piercing riveting connector - Google Patents
A kind of quality evaluating method for self-piercing riveting connector Download PDFInfo
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- CN109883364A CN109883364A CN201910229590.8A CN201910229590A CN109883364A CN 109883364 A CN109883364 A CN 109883364A CN 201910229590 A CN201910229590 A CN 201910229590A CN 109883364 A CN109883364 A CN 109883364A
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Abstract
The invention discloses a kind of quality evaluating methods for self-piercing riveting connector, the evaluation method is using wire cutting by riveted joint along central axis cutting, after cutting plane sanding and polishing, measure internal lock length L, the base thickness value T and ailhead height H of cutaway section, further according to the size of measurement, butt joint quality is evaluated.The present invention with butt joint quality can evaluate intuitive and reliablely, and evaluation result accuracy is high, can be used as the analytical standard of the reason bad to riveting quality, is of great significance to raising Joint Reliability and production efficiency.
Description
Technical field
The present invention relates to the fields of self-piercing riveting, in particular to a kind of quality evaluating method for self-piercing riveting connector.
Background technique
Self-piercing riveting is a kind of Mechanical joining technique, and rivet pierces through upper layer of material under the promotion of formed punch, in cavity plate and punching
Under the collective effect of head, rivet tail portion is opened in subsurface material forms bell shape, to achieve the purpose that mechanical interlocked.
Self-piercing riveting has the characteristics that bonding strength height, without thermal deformation, environment-protection low-consumption, is the main interconnection technique in aluminum vehicle body.Its
Joint quality mainly by rivet, mold, riveting equipment, be connected many-sided effects of process parameters such as material, be easy to appear fall off,
Intensity deficiency and other issues.Therefore, riveting quality is evaluated, is had to raising Joint Reliability and production efficiency important
Meaning.
Existing self-piercing riveting joint quality evaluation method mainly passes through on-line checking, and this method is high-efficient, can be right
Riveted joint quality is diagnosed real-time, quickly, but on-line detecting system is complicated, and belongs to the detection of non-demolition formula, testing result
Not intuitive enough, in analysis riveting quality poor prognostic cause and in terms of improving joint quality, directive significance is not strong.
Summary of the invention
The object of the invention is to overcome the deficiencies of existing technologies, provide that a kind of testing result is intuitive and accuracy is high
Quality evaluating method for self-piercing riveting connector.
In order to achieve the above object, the present invention provides a kind of quality evaluating method for self-piercing riveting connector, using line
Cutting method by riveted joint along central axis cutting, after cutting plane sanding and polishing, measure cutaway section internal lock length L,
Base thickness value T and ailhead height H, further according to the size of measurement, butt joint quality is evaluated.
In above-mentioned technical proposal, the internal lock length L is the leg outer edge of rivet to the top plate cut by rivet
The horizontal distance of lower edge.
In above-mentioned technical proposal, if internal lock length L >=0.15mm, is considered as qualification.
In above-mentioned technical proposal, if internal lock length L < 0.15mm, is considered as unqualified.
In above-mentioned technical proposal, the base thickness value T be rivet leg tip to lower plywood bottom axial width.
In above-mentioned technical proposal, if base thickness value T >=0.07mm, is considered as qualification.
In above-mentioned technical proposal, if base thickness value T < 0.07mm, is considered as unqualified.
In above-mentioned technical proposal, the ailhead height H is the top end face of rivet and the difference in height of top plate top end face.
In above-mentioned technical proposal, if -0.05mm≤ailhead height H≤0.05mm, is considered as qualification；
In above-mentioned technical proposal, if ailhead height H < -0.05mm or ailhead height H > 0.05mm, is considered as and does not conform to
Lattice.
Compared with prior art, the present invention has the advantage that
First, evaluation method of the invention by riveted joint along central axis cutting, it is long to the internal lock for influencing joint quality
Tri- degree L, base thickness value T and ailhead height H important sectional dimensions measure, according to the sectional dimension of measurement, butt joint quality
Evaluate intuitive and reliablely and accuracy is high, can be used as the analytical standard of the reason bad to riveting quality, to raising
Joint Reliability and production efficiency are of great significance.
Second, evaluation parameter internal lock length L of the invention is the leg outer edge of rivet to the top plate cut by rivet
Lower edge horizontal distance, internal lock length is bigger, illustrate rivet leg insertion lower plywood it is deeper, rivet is formed with lower plywood
Interlocking degree it is higher, the quality of riveted joint is better.As L < 0.15mm, upper and lower level material falls back, joint quality are easily caused
It is unqualified, by suitably increasing riveting load, increase the measures such as cavity plate boss height, it can increase rivet tail portion opening degree and interior
Length L is locked, self-locking property is promoted, and riveting parts quality is improved.
Third, evaluation parameter base thickness value T of the invention be rivet leg tip to lower plywood bottom axial width, when
When T < 0.07mm, the subsurface material thickness contacted with cavity plate is excessively thin, and intensity is insufficient, easily causes riveting parts bottom to fall off, connector matter
It measures unqualified, by suitably increasing cavity plate diameter, reducing the measures such as rivet hardness, is avoided that base thickness value T is too small, improves riveting matter
Amount.
Fourth, evaluation parameter ailhead height H of the invention is the top end face of rivet and the difference in height of top plate top end face, matter
The ailhead height H for measuring qualified riveted joint should be close to zero；As -0.05mm≤H≤0.05mm, rivet head and upper layer material
Upper surface is expected close to concordantly, and the surface quality of riveting parts is good.As H < -0.05mm, ailhead sinks to upper sheet top surface, by appropriate
Reduce riveting load, surface quality can be improved；As H > 0.05mm, ailhead is higher than upper sheet top surface, is carried by suitably increasing riveting
Lotus can improve surface quality.
Detailed description of the invention
Fig. 1 is schematic diagram of the self-piercing riveting connector along central axis cutting；
Fig. 2 is the schematic cross-section of self-piercing riveting joint quality evaluation；
(a) is the undesirable photo of self-piercing riveting quality caused by connector internal lock length L insufficient in Fig. 3, and figure (b) is to improve
Afterwards, the increased photo of internal lock length L；
(a) is the undesirable photo of self-piercing riveting quality caused by base thickness value T is too small in Fig. 4, and figure (b) is base thickness after improving
The increased photo of value T；
(a) is the undesirable photo of self-piercing riveting quality caused by connector ailhead height H is excessive in Fig. 5, and figure (b) is to improve
Afterwards, the increased photo of ailhead height.
In figure, 1- rivet, 2- top plate, 3- lower plywood, 4- cutting line.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Quality evaluating method for self-piercing riveting connector of the invention, includes the following steps:
S1, the detection of riveted joint section: using wire cutting method by riveted joint along central axis cutting, as shown in Figure 1,
After cutting plane sanding and polishing, using electron microscope observation contact cross-section situation, to influence joint quality internal lock length L,
Tri- important sectional dimensions of base thickness value T and ailhead height H measure.As shown in Fig. 2, internal lock length L is outside the leg of rivet 1
Edge to the top plate 2 cut by rivet lower edge horizontal distance, base thickness T be rivet 1 leg tip to 3 bottom of lower plywood
The axial width in portion, ailhead height H are the top end face of rivet 1 and the difference in height of 2 top end face of top plate.
S2, riveted joint quality evaluation: according to the sectional dimension of measurement, butt joint quality is evaluated, and to riveting matter
Bad reason is measured to be analyzed.
In Fig. 3 (a), the rivet leg at the internal lock length L < 0.15mm (L=0.13mm) of self-piercing riveting connector, I is not complete
Complete to open, rivet is formed by that interlocking degree is not high, and upper and lower layer material is easy to fall off, and joint quality is unqualified with lower plywood.Fig. 3
(b) in, after suitably increasing riveting load, rivet tail portion opening degree and internal lock length L at I ' increase (L=
0.32mm), self-locking property is promoted, and riveting parts quality is improved.
In Fig. 4 (a), the lower plywood intensity at the base thickness value T < 0.07mm (T=0) of self-piercing riveting connector, II is insufficient, riveting
Fitting bottom is easy to fall off, and joint quality is unqualified.In Fig. 4 (b), by suitably increasing cavity plate diameter at II ', base thickness value T increases
(T=0.33mm), riveting parts quality is improved.
In Fig. 5 (a), the ailhead at the ailhead height H > 0.05mm (H=0.29mm) of self-piercing riveting connector, III is higher than upper
The surface quality of plate top surface, riveting parts is bad, and joint quality is unqualified.In Fig. 5 (b), by suitably increasing riveting load, III '
The ailhead height H=0 at place, riveting parts surface quality are improved.
A kind of method for the evaluation of self-piercing riveting joint quality of the embodiment of the present invention is rushed certainly by Electron microscopy
The section situation of riveted joint, according to three important sectional dimension measured values (internal lock length L, base thickness value T and ailhead height H),
The progress of butt joint quality is evaluated intuitive and reliablely, and the reason bad to riveting quality is analyzed, to raising Joint Reliability
It is of great significance with production efficiency.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (10)
1. a kind of quality evaluating method for self-piercing riveting connector, it is characterised in that: use wire cutting method by riveted joint
Along central axis cutting, after cutting plane sanding and polishing, internal lock length L, the base thickness value T and ailhead height H of cutaway section are measured,
Further according to the size of measurement, butt joint quality is evaluated.
2. the quality evaluating method according to claim 1 for self-piercing riveting connector, it is characterised in that: the internal lock is long
Degree L be rivet (1) leg outer edge to the top plate (2) cut by rivet (1) lower edge horizontal distance.
3. the quality evaluating method according to claim 1 or 2 for self-piercing riveting connector, it is characterised in that: if internal lock
Length L >=0.15mm, then be considered as qualification.
4. the quality evaluating method according to claim 1 or 2 for self-piercing riveting connector, it is characterised in that: if internal lock
Length L < 0.15mm, then be considered as unqualified.
5. the quality evaluating method according to claim 1 for self-piercing riveting connector, it is characterised in that: the base thickness value
T be rivet (1) leg tip to lower plywood (3) bottom axial width.
6. being used for the quality evaluating method of self-piercing riveting connector according to claim 1 or 5, it is characterised in that: if base thickness
Value T >=0.07mm, then be considered as qualification.
7. being used for the quality evaluating method of self-piercing riveting connector according to claim 1 or 5, it is characterised in that: if base thickness
Value T < 0.07mm, then be considered as unqualified.
8. the quality evaluating method according to claim 1 for self-piercing riveting connector, it is characterised in that: the ailhead is high
Degree H is the top end face of rivet (1) and the difference in height of top plate (2) top end face.
9. the quality evaluating method for self-piercing riveting connector according to claim 1 or 8, it is characterised in that: if-
0.05mm≤ailhead height H≤0.05mm, then be considered as qualification.
10. the quality evaluating method for self-piercing riveting connector according to claim 1 or 8, it is characterised in that: if ailhead
Height H < -0.05mm or ailhead height H > 0.05mm, then be considered as unqualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910229590.8A CN109883364A (en) | 2019-03-25 | 2019-03-25 | A kind of quality evaluating method for self-piercing riveting connector |
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| CN201910229590.8A CN109883364A (en) | 2019-03-25 | 2019-03-25 | A kind of quality evaluating method for self-piercing riveting connector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022021828A1 (en) * | 2020-07-29 | 2022-02-03 | 安徽巨一科技股份有限公司 | Automatic determination method for quality state of self-piercing riveting process |
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2019
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| US20080177512A1 (en) * | 2007-01-18 | 2008-07-24 | Andreas Wenzel | Online determination of the quality characteristics for punch riveting and clinching |
| US7797126B2 (en) * | 2007-01-18 | 2010-09-14 | Bollhoff Verbindungstechnik Gmbh | Online determination of the quality characteristics for punch riveting and clinching |
| CN102004056A (en) * | 2010-12-24 | 2011-04-06 | 上海交通大学 | Self-piercing riveting quality online detection system and method |
| CN102679923A (en) * | 2012-05-09 | 2012-09-19 | 南京航空航天大学 | Non-destructive inspection method for interference quantity of aerolite wallboard riveting structure |
| CN105091752A (en) * | 2015-09-07 | 2015-11-25 | 中国商用飞机有限责任公司 | Interference-fit-based method for measuring rivet deformation interference amount |
| WO2017165814A2 (en) * | 2016-03-25 | 2017-09-28 | Arconic Inc. | Resistance welding fasteners, apparatus and methods for joining dissimilar materials and assessing joints made thereby |
| CN109030752A (en) * | 2018-09-30 | 2018-12-18 | 宁波三星智能电气有限公司 | A kind of quality inspection method at the riveting position applied to connecting column and plate |
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| WO2022021828A1 (en) * | 2020-07-29 | 2022-02-03 | 安徽巨一科技股份有限公司 | Automatic determination method for quality state of self-piercing riveting process |
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Application publication date: 20190614 |
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