CN106501320A - A kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion - Google Patents
A kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion Download PDFInfo
- Publication number
- CN106501320A CN106501320A CN201610934335.XA CN201610934335A CN106501320A CN 106501320 A CN106501320 A CN 106501320A CN 201610934335 A CN201610934335 A CN 201610934335A CN 106501320 A CN106501320 A CN 106501320A
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- China
- Prior art keywords
- contact
- positive
- negative
- weld seam
- fusion
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The present invention relates to a kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion, belongs to testing equipment technical field.Technical scheme is：When stud weld seam has lack of fusion defect, the size that will result directly in weld interface product changes, and then reflects to instrument for measuring DC resistance（11）The change of measured value on screen；Instrument for measuring DC resistance shows the difference of measured value and standard value, so as to complete the Non-Destructive Testing of stud weld seam degree of fusion.Structure of the dedicated probe of the present invention using the integration of both positive and negative polarity contact, during measurement, contact area is big, uniform force, simple structure, flexible operation, and detection efficiency is high, error is little.The present invention by DC resistance method measure welding screw degree of fusion, stud and weld strength will not be caused to damage, easy to operate, detection efficiency height, be suitable on production line and operation field high-volume quick detection.
Description
Technical field
The present invention relates to a kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion, belongs to detection and sets
Standby technical field.
Background technology
Arc stud welding is widely used in the numerous areas such as auto manufacturing, plant equipment manufacturing industry, structural steelwork, because receiving
Affect to many factors such as welding equipment, welding parameter selection and welding operations, the weld seam between stud and workpiece often occurs
The defect of lack of fusion, this local incomplete fusion defect can substantially reduce the intensity of stud weld seam, in turn result in stud stress and break
Split, drop.At present, when stud weld seam fusion situation is detected, how using destructive testings such as torsion-testing, bend tests, i.e.,
Just the qualified stud of failure test is tolerated, and its mechanical property can also be subject to a certain degree of damage.And conventional ray detection,
Ultrasonic detection method is not applied to the inspection of job site high-volume stud weld seam degree of fusion because limiting by many kinds of parameters condition
Survey.
Content of the invention
It is an object of the present invention to provide a kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion, operation
Flexibly, convenient, fast and accurate complete lossless decomposition, efficiently solve the problems referred to above present in background technology.
The technical scheme is that：
A kind of not damaged dedicated probe for detecting stud weld seam degree of fusion, touches comprising negative contact terminal, insulating sleeve, positive pole
Head, truncated cone spiral compression spring, insulator foot, positive signal wire, negative signal wire, workpiece and welding screw, described negative
Pole contact is ring contact, and positive contact is dish type contact, and the small end of truncated cone spiral compression spring and positive contact are interconnected,
Big end is interconnected with insulator foot, and positive contact, truncated cone spiral compression spring are arranged on the inside of insulating sleeve, insulator foot
The bottom of insulating sleeve is arranged on, negative contact terminal is arranged on the outside of insulating sleeve, and positive signal wire is through in insulator foot
Interconnect with positive contact behind the inside of heart circular hole and truncated cone spiral compression spring, negative signal wire is in outside and insulation sleeve
Cylinder is interconnected with negative contact terminal after being fastened, and insulating sleeve back-off is arranged on and is welded with the workpiece of welding screw, and negative pole is touched
Head is contacted with each other with workpiece, is contacted with each other at the top of positive contact and welding screw.
The negative contact terminal, the material of positive contact are copper.
The distance of the lower surface of the lower surface of the positive contact to negative contact terminal less than the length of welding screw 5 millimeters with
On.
Disc positive contact is moved freely with telescopic spring in sleeve inner, truncated cone spiral compression spring and disc
Under only by gravity state, disc positive contact lower surface is less than positive contact to the distance of annular negative contact terminal lower surface
Stud length.
A kind of non-destructive method for detecting stud weld seam degree of fusion, comprises the steps of：
Carried out using dedicated probe, the probe includes negative contact terminal, insulating sleeve, positive contact, truncated cone helical compression bullet
Spring, insulator foot, positive signal wire, negative signal wire, workpiece and welding screw, the negative contact terminal are ring contact,
Positive contact is dish type contact, the small end of truncated cone spiral compression spring and positive contact interconnection, holds greatly mutual with insulator foot
It is connected, positive contact, truncated cone spiral compression spring are arranged on the inside of insulating sleeve, insulator foot is arranged on insulating sleeve
Bottom, negative contact terminal are arranged on the outside of insulating sleeve, and positive signal wire is through insulator foot center hole and truncated cone spiral
Interconnect with positive contact behind the inside of compression spring, negative signal wire after outside and insulating sleeve are fastened with negative
Pole contact is interconnected；
Insulating sleeve back-off is arranged on and is welded with the workpiece of welding screw, and negative contact terminal is contacted with each other with workpiece, positive contact
Contact with each other with the top of welding screw；Stud, weld seam and workpiece are regarded as an entirety, by the two of instrument for measuring DC resistance
Individual lead end connects positive signal wire and negative signal wire respectively；
When DC current flows through conductor, electric current is equally distributed on the current-carrying cross section of conductor, is not as alternating current such
There is Kelvin effect；According to Ohm's law, when measured resistance passes to DC current, the electric current in measured resistance and its two are measured
The voltage drop at end, you can calculate the resistance of the measured resistance, and the resistance of measured resistance depends on resistivity, resistance length and cuts
Area；When stud weld seam has lack of fusion defect, the size that will result directly in weld interface product changes, and then instead
Reflect the change of measured value on instrument for measuring DC resistance screen；Instrument for measuring DC resistance shows the difference of measured value and standard value,
So as to complete the Non-Destructive Testing of stud weld seam degree of fusion.
Instrument for measuring DC resistance is public instrument；Different size weld bolt, the conversion of different weld seam fusion faces
Formula and synopsis, be it is known in the art that the calculated results of measurement and synopsis are contrasted, can quickly, straight
The judge stud weld seam degree of fusion of sight.
The invention has the beneficial effects as follows：Structure of the dedicated probe of the present invention using the integration of both positive and negative polarity contact, touches from positive pole
Head with draw holding wire in negative contact terminal respectively and be connected with detecting instrument, instrument for measuring DC resistance with the contact form of detected pieces is
Face contacts, and during measurement, contact area is big, uniform force, and simple structure, flexible operation overcome split type measuring pen or measurement folder
Many deficiencies of tool, detection efficiency is high, error is little, be suitable on production line and operation field high-volume quick detection.This
Bright by DC resistance method measure welding screw degree of fusion, stud and weld strength will not be caused to damage, easy to operate, detection
Efficiency high, be suitable on production line and operation field high-volume quick detection.
Description of the drawings
Fig. 1 is the dedicated probe structure chart of the embodiment of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is embodiment of the present invention detects schematic diagram；
In figure：Negative contact terminal 1, insulating sleeve 2, positive contact 3, truncated cone spiral compression spring 4, insulator foot 5, positive signal are led
Line 6, negative signal wire 7, workpiece 8, welding screw 9, weld seam 10, instrument for measuring DC resistance 11, synopsis 12.
Specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
A kind of probe of detection stud weld seam degree of fusion, comprising negative contact terminal 1, insulating sleeve 2, positive contact 3, truncated cone spiral shell
Rotation compression spring 4, insulator foot 5, positive signal wire 6, negative signal wire 7, workpiece 8 and welding screw 9, the negative pole are touched
1 is ring contact, and positive contact 3 is dish type contact, and the small end of truncated cone spiral compression spring 4 is interconnected with positive contact 3,
Big end is interconnected with insulator foot 5, and positive contact 3, truncated cone spiral compression spring 4 are arranged on inside the 2 of insulating sleeve, insulation
Base 5 is arranged on the bottom of insulating sleeve 2, and negative contact terminal 1 is arranged on the outside of insulating sleeve 2, and positive signal wire 6 is through absolutely
Interconnect with positive contact 3 behind the inside of 5 center hole of edge base and truncated cone spiral compression spring 4, negative signal wire 7 exists
Outside is interconnected with negative contact terminal 1 after being fastened with insulating sleeve 2, and 2 back-off of insulating sleeve is arranged on and is welded with welding screw 9
Workpiece on, negative contact terminal 1 is contacted with each other with workpiece 8, and positive contact 3 is contacted with each other with the top of welding screw 9.
The material of the negative contact terminal 1 and positive contact 3 is copper.
The distance less than the length of welding screw 95 of the lower surface of the positive contact 3 to the lower surface of negative contact terminal 1 is in the least
More than rice.
Disc positive contact is moved freely with telescopic spring in sleeve inner, truncated cone spiral compression spring and disc
Under only by gravity state, disc positive contact lower surface is less than positive contact to the distance of annular negative contact terminal lower surface
Stud length.
A kind of non-destructive method for detecting stud weld seam degree of fusion, comprises the steps of：
Carried out using dedicated probe, the probe includes negative contact terminal, insulating sleeve, positive contact, truncated cone helical compression bullet
Spring, insulator foot, positive signal wire, negative signal wire, workpiece and welding screw, the negative contact terminal are ring contact,
Positive contact is dish type contact, the small end of truncated cone spiral compression spring and positive contact interconnection, holds greatly mutual with insulator foot
It is connected, positive contact, truncated cone spiral compression spring are arranged on the inside of insulating sleeve, insulator foot is arranged on insulating sleeve
Bottom, negative contact terminal are arranged on the outside of insulating sleeve, and positive signal wire is through insulator foot center hole and truncated cone spiral
Interconnect with positive contact behind the inside of compression spring, negative signal wire after outside and insulating sleeve are fastened with negative
Pole contact is interconnected；
When stud weld seam degree of fusion is detected, first by the both positive and negative polarity signal conductor and instrument for measuring DC resistance of dedicated probe
11 are connected, and are calibrated；After the calibration of instrument for measuring DC resistance 11 is finished, then by dedicated probe back-off to the workpiece for being welded with stud
On so that negative contact terminal and workpiece good contact, positive contact being subject on stud under top and spring downward comprehensive function power,
Contact with stud tight, such both positive and negative polarity signal of telecommunication is just led via positive contact, welding screw, workpiece and negative contact terminal
Logical；Stud, weld seam 10 and workpiece are regarded as an entirety, two lead ends of instrument for measuring DC resistance are connected positive pole respectively
Signal conductor and negative signal wire；
When DC current flows through conductor, electric current is equally distributed on the current-carrying cross section of conductor, is not as alternating current such
There is Kelvin effect；According to Ohm's law, when measured resistance passes to DC current, the electric current in measured resistance and its two are measured
The voltage drop at end, you can calculate the resistance of the measured resistance, and the resistance of measured resistance depends on resistivity, resistance length and cuts
Area；When stud weld seam has lack of fusion defect, the size that will result directly in 10 bonded area of weld seam changes, and then
Reflect the change of measured value on instrument for measuring DC resistance screen；Again by Theoretical Calculation and contrast, spiral shell can be passed judgment on based on this
Post weld seam degree of fusion.
Instrument for measuring DC resistance is public instrument；Different size weld bolt, the conversion of different weld seam fusion faces
Formula and synopsis 12, be it is known in the art that the calculated results of measurement and synopsis are contrasted, can quickly,
Stud weld seam degree of fusion is intuitively passed judgment on.
In actual applications, when detect stud weld seam degree of fusion when, first by the both positive and negative polarity signal conductor of dedicated probe with
Instrument for measuring DC resistance is connected, and is calibrated；After instrument for measuring DC resistance calibration is finished, then by dedicated probe back-off to being welded with spiral shell
On the workpiece of post so that negative contact terminal and workpiece good contact, positive contact top and spring downward on by stud are comprehensively made
Under firmly, also contact with stud tight, such both positive and negative polarity signal of telecommunication just via positive contact, welding screw, workpiece and is born
Pole contact conducting, instrument for measuring DC resistance shows the difference of measured value and standard value, so as to complete the nothing of stud weld seam degree of fusion
Damage detection.
Claims (5)
1. a kind of not damaged dedicated probe for detecting stud weld seam degree of fusion, it is characterised in that：Comprising negative contact terminal（1）、
Insulating sleeve（2）, positive contact（3）, truncated cone spiral compression spring（4）, insulator foot（5）, positive signal wire（6）, negative pole
Signal conductor（7）, workpiece（8）And welding screw（9）, the negative contact terminal（1）For ring contact, positive contact（3）For dish type
Contact, truncated cone spiral compression spring（4）Small end and positive contact（3）Interconnect, greatly end and insulator foot（5）Mutually it is connected
Connect, positive contact（3）, truncated cone spiral compression spring（4）It is arranged on insulating sleeve（2）Inside, insulator foot（5）It is arranged on absolutely
Edge sleeve（2）Bottom, negative contact terminal（1）It is arranged on insulating sleeve（2）Outside, positive signal wire（6）Through insulation bottom
Seat（5）Center hole and truncated cone spiral compression spring（4）Inside after with positive contact（3）Interconnect, negative signal wire
（7）In outside and insulating sleeve（2）With negative contact terminal after being fastened（1）Interconnect, insulating sleeve（2）Back-off is arranged on weldering
There is welding screw（9）Workpiece（8）On, negative contact terminal（1）With workpiece（8）Contact with each other, positive contact（3）With welding screw
（9）Top contact with each other.
2. a kind of not damaged dedicated probe for detecting stud weld seam degree of fusion according to claim 1, its feature exist
In：The negative contact terminal（1）And positive contact（3）Material for copper.
3. a kind of not damaged dedicated probe for detecting stud weld seam degree of fusion according to claim 1, its feature exist
In：The positive contact（3）Lower surface to negative contact terminal（1）The distance of lower surface compare welding screw（9）Length little 5 milli
More than rice.
4. a kind of not damaged dedicated probe for detecting stud weld seam degree of fusion according to claim 1 and 2, its feature
It is：Disc positive contact is moved freely with telescopic spring in sleeve inner, and truncated cone spiral compression spring and disc are just
Under only by gravity state, disc positive contact lower surface is less than spiral shell to the distance of annular negative contact terminal lower surface to pole contact
Column length.
5. a kind of non-destructive method for detecting stud weld seam degree of fusion, it is characterised in that comprise the steps of：Using special
Probe is carried out, and the probe includes negative contact terminal（1）, insulating sleeve（2）, positive contact（3）, truncated cone spiral compression spring（4）, absolutely
Edge base（5）, positive signal wire（6）, negative signal wire（7）, workpiece（8）And welding screw（9）, the negative contact terminal is
Ring contact, positive contact is dish type contact, and the small end of truncated cone spiral compression spring and positive contact are interconnected, big end with exhausted
Edge base is interconnected, and positive contact, truncated cone spiral compression spring are arranged on the inside of insulating sleeve, and insulator foot is arranged on absolutely
The bottom of edge sleeve, negative contact terminal are arranged on the outside of insulating sleeve, positive signal wire through insulator foot center hole and
Interconnect with positive contact behind the inside of truncated cone spiral compression spring, negative signal wire is solid with insulating sleeve winding in outside
Interconnect with negative contact terminal after fixed；Insulating sleeve back-off is arranged on and is welded with the workpiece of welding screw, negative contact terminal and work
Part is contacted with each other, and is contacted with each other at the top of positive contact and welding screw；Stud, weld seam（10）With workpiece regard as one whole
Two lead ends of instrument for measuring DC resistance are connected positive signal wire and negative signal wire by body respectively；DC current
When flowing through conductor, electric current is equally distributed on the current-carrying cross section of conductor, is not as alternating current and there is Kelvin effect like that；Root
According to Ohm's law, when measured resistance passes to DC current, the voltage drop at electric current in measured resistance and its two ends is measured, you can
The resistance of the measured resistance is calculated, and the resistance of measured resistance depends on resistivity, resistance length and sectional area；When stud weld seam
When there is lack of fusion defect, the size that will result directly in weld interface product changes, and then reflects to D.C. resistance survey
Examination instrument（11）The change of measured value on screen；Instrument for measuring DC resistance shows the difference of measured value and standard value, so as to complete spiral shell
The Non-Destructive Testing of post weld seam degree of fusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934335.XA CN106501320B (en) | 2016-11-01 | 2016-11-01 | Nondestructive method for detecting welding seam fusion degree of stud and special probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934335.XA CN106501320B (en) | 2016-11-01 | 2016-11-01 | Nondestructive method for detecting welding seam fusion degree of stud and special probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106501320A true CN106501320A (en) | 2017-03-15 |
| CN106501320B CN106501320B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610934335.XA Active CN106501320B (en) | 2016-11-01 | 2016-11-01 | Nondestructive method for detecting welding seam fusion degree of stud and special probe |
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| CN (1) | CN106501320B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596677A (en) * | 2018-11-02 | 2019-04-09 | 大族激光科技产业集团股份有限公司 | A kind of quality detection device, method, system and integrated probe component |
| WO2020087519A1 (en) * | 2018-11-02 | 2020-05-07 | 大族激光科技产业集团股份有限公司 | Quality test device, method, and system, and integrated probe assembly |
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| CN109596677A (en) * | 2018-11-02 | 2019-04-09 | 大族激光科技产业集团股份有限公司 | A kind of quality detection device, method, system and integrated probe component |
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| JP2021503591A (en) * | 2018-11-02 | 2021-02-12 | ハンズ レーザー テクノロジー インダストリー グループ カンパニー リミテッド | Quality inspection equipment, methods, systems and integrated probe assemblies |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106501320B (en) | 2023-07-07 |
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