CN101368895B - Stud welding intensity detection apparatus and method - Google Patents
Stud welding intensity detection apparatus and method Download PDFInfo
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- CN101368895B CN101368895B CN2008100230510A CN200810023051A CN101368895B CN 101368895 B CN101368895 B CN 101368895B CN 2008100230510 A CN2008100230510 A CN 2008100230510A CN 200810023051 A CN200810023051 A CN 200810023051A CN 101368895 B CN101368895 B CN 101368895B
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- 238000003466 welding Methods 0.000 title claims abstract description 71
- 238000001514 detection method Methods 0.000 title claims abstract description 26
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- 230000035807 sensation Effects 0.000 claims description 17
- 230000002950 deficient Effects 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 230000001066 destructive effect Effects 0.000 abstract description 6
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Abstract
The invention relates to a stud welding intensity detection device and a stud welding intensity detection method of the detection device; the stud welding intensity detection device comprises an auxiliary sleeve device and a set-value torque wrench; the auxiliary sleeve device is used to sleeve screws or similar components; the set-value torque wrench is connected with the auxiliary sleeve device and provided with a torque set value based on the working condition; the operator twists the wrench and determines the stud welding intensity based on the phenomenon; the invention is improved based on the existing conditions and invents a non-destructive stud welding strength detection device which is simple and easy to use and can reduce unnecessary waste caused by quality testing.
Description
Technical field
The present invention relates to a kind of stud welding intensity pick-up unit, also relate to a kind of stud welding intensity detection method of using this pick-up unit.
Background technology
At present, in the welding technology of automobile manufacturing enterprise, arc stud welding is a kind of process of widespread usage.Its application is also just at expanded scope, and its welding quality will directly influence the assembly quality of general assembly assembling.On the one hand, will cause assembly parts to be difficult to pack into, also can produce extra-stress, after product uses a period of time by the user, will cause a series of problems such as bolt looseness or assembly parts distortion after its stress relief even pack into if deviation takes place in the position of welding.On the other hand,, screw occurs and break, bring a large amount of problems of doing over again thus if the insufficient strength of stud welding causes in the general assembly assembling process so probably.The problem of this two aspect all can influence complete vehicle quality.This shows that the welding quality of arc stud welding is extremely important.
The quality testing of existing arc stud welding has two kinds of ways: a kind of is visual examination, mainly be that the shape of observing weld flush is judged, but because the welding joint of arc stud welding is covered by the weldering nail, the visualizing detection mode can not judge whether rosin joint; Second method is to adopt aid to detect, and this is a kind of destructive detection mode, also has been damaged even detected the back certified products.
Specifically, the quality testing of arc stud welding comprises the detection of welding position and weld strength, the former can guarantee by anchor clamps (frock), the latter's detection has two kinds of ways at present: a kind of is visual examination, mainly be to judge by the shape of observing weld flush, but because the welding corresponding circle of sensation of arc stud welding is covered by the weldering nail, the visualizing detection mode can not effectively be judged the existence of rosin joint; Second method is to adopt aid to detect, with an internal diameter be slightly larger than weldering nail diameter, pipe 3 ' that inside surface is smooth is placed on the weldering nail 1 ', the along continuous straight runs application of force then, by the time with vertical direction (α=15 ~ 30 °) bending at an angle, weld seam does not ftracture, and weldering nail 1 ' workpiece 2 ' does not come off and gets final product (Fig. 1).Screw or workpiece have so in fact been destroyed.
Can sum up present stud welding intensity detection mode by last analysis and have following defective:
1. visualizing detection method is unreliable;
2. destructive detection method angle of bend can not accurately and easily be measured;
3. destructive detection method has also been destroyed certified products, brings waste and loss to company.
Summary of the invention
The object of the present invention is to provide a kind of stud welding intensity pick-up unit, can reliably make things convenient for, detect to non-destructive the arc stud welding weld strength.
Another object of the present invention is to provide a kind of stud welding intensity detection method of above-mentioned detection device, detect the weld strength of arc stud welding easily and effectively, strict circle of good definition divides certified products and unacceptable product; Destructive arc stud welding weld strength detection mode before changing, the protection certified products are without prejudice.
To achieve these goals, the technical solution adopted in the present invention is:
By welding technology and the detection mode of scrutinizing arc stud welding, according to the structural behaviour of plain screw and T sprig, analyse in depth stud welding stress destruction process, draw the novel pick-up unit of the present invention.The present invention combines by an auxiliary socket device and definite value torque spanner, and it can comprise
1, a cover definite value torque spanner, its definite value size requires to set up to specifications;
2, the auxiliary socket of a cover plain screw;
3, a cover T sprig auxiliary socket.
Definite value torque spanner and auxiliary socket are assembled as requested, the employee sets up the size of torque spanner definite value with reference to given parameter list, auxiliary socket is enclosed within on the screw, pulls the definite value torque spanner then, just can detect the weld strength of arc stud welding easily:
1. utilize that the definite value torque spanner is stressed to reach the critical point that the characteristics of skidding after the setting value are set detection;
2. construct the auxiliary socket device of attachment screw and definite value torque spanner;
3. rationally set the torque value of definite value torque spanner.
Concrete technical scheme is as follows:
A kind of stud welding intensity pick-up unit, comprise an auxiliary socket device and certain value torque spanner, described auxiliary socket device is used to overlap cartridge screw or analog, and described definite value torque spanner is connected with the auxiliary socket device and is provided with a torsion definite value according to operating mode.
Described screw or analog are welded on the workpiece, between form the welding corresponding circle of sensation.
The described operating mode that is used for determining the torsion of definite value torque spanner comprises the thickness of slab of screw or analog diameter and workpiece.
Described auxiliary socket device is an auxiliary socket, and described screw or analog are screw, and wherein, auxiliary socket is provided with a hole, and the definite value torque spanner inserts this hole and twisting detects weld strength.
Described auxiliary socket device is a T jacket tube, and described screw or analog are T type screw, and wherein, T jacket tube is provided with a hole, and the definite value torque spanner inserts this hole and twisting detects weld strength.
Between screw and the auxiliary socket device gap is arranged, the hole on the auxiliary socket device is a square opening.
Described gap is preferably 0.1 ~ 0.2mm.
A kind of stud welding intensity detection method of using above-mentioned pick-up unit, screw or analog are welded on the workpiece, form the welding corresponding circle of sensation between the two, the auxiliary socket device be enclosed within on screw or the analog and between a gap is arranged, the definite value torque spanner is inserted in the hole of auxiliary socket device and detect weld strength, the torsion of definite value torque spanner is made as certain value; The operator twists spanner, if can hear spanner " clatter, the tower " sound, and unexpected skidding occurs, then shows the arc stud welding relay of the value of setting less than reality, stops firmly; Take out definite value torque spanner and auxiliary socket device, whether whether inspection screw or analog bend or weld corresponding circle of sensation and tear, if any then defective; Otherwise it is then qualified.
Described auxiliary socket device is auxiliary socket or T jacket tube, and described screw or analog are screw or T type screw, and wherein, auxiliary socket or T jacket tube are provided with a square opening, and the definite value torque spanner inserts this hole and twisting detects weld strength.
Described gap is preferably 0.1 ~ 0.2mm between auxiliary socket device cover and screw or the analog.
The torsion of described definite value torque spanner is made as certain value, and its method to set up is:
Panel thickness H is big more, and then fusion penetration is big more, and thin plate thinks that then welding penetration is thickness of slab;
The area S of welding corresponding circle of sensation is screw or analog sectional area;
External torque acts on screw or analog, and merging edge's shear strength is τ, and when shear failure took place, force analysis was as follows:
F1 and F2 are that auxiliary socket acts on the power on the screw, its equal and opposite in direction, and direction is opposite, form moment M, the size of this moment equals to act on the moment size on the definite value torque spanner, and the shearing force Ft that the weld zone is subjected to plate acts on the whole shear surface, form a moment Mt, and
Mt＝4∫
0 π/2H·τ·(D/2)
2·COSθ·dθ＝HτD
2
As H τ D
2＜Mt or H τ D
2It is qualified and defective that＞Mt is respectively weld strength;
Proofread and correct the definite value torsion of confirming torque spanner according to formula and by detecting.
Compare with present prior art, beneficial effect of the present invention is embodied in:
(1) utilizes existing condition to transform, invented a kind of nondestructive stud welding intensity pick-up unit;
(2) device is simple, and is easy to use, can reduce the unnecessary waste that quality restriction brings.
Description of drawings
Fig. 1: the detection method synoptic diagram of arc stud welding in the prior art;
Fig. 2: the arc stud welding weld strength of screw detects synoptic diagram;
Fig. 3: the arc stud welding weld strength of T type screw detects synoptic diagram;
Fig. 4: screw shear stress synoptic diagram;
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
The scheme accompanying drawings of package unit:
The arc stud welding weld strength pick-up unit of screw, as shown in Figure 2, screw 4 is welded on the workpiece 1, forms welding corresponding circle of sensation 2 between them, and this covering device utilizes the definite value torque spanner to insert in the square opening of auxiliary socket 3 and detects weld strength.Gap between screw and the sleeve requires to be controlled at 0.1 ~ 0.2mm.The torsion of definite value torque spanner is made as certain value (concrete numerical value sees Table lattice), the operator twists spanner, if spanner can be heard " clatter, tower " sound, and the phenomenon that appearance is skidded suddenly, the value that then shows setting can stop firmly less than the arc stud welding relay of reality, take out torque spanner and auxiliary socket, check whether screw bends or following welding corresponding circle of sensation is torn, if any, then defective; Then unqualified.
The arc stud welding weld strength pick-up unit of T type screw as shown in Figure 3, T type screw 5 is welded on the workpiece 1 by arc stud welding, forms welding corresponding circle of sensation 2 between them, this covering device utilizes the definite value torque spanner to insert in the square opening of T jacket tube 6 and detects weld strength.Gap between screw and the sleeve requires to be controlled at 0.1 ~ 0.2mm.With the torsion of definite value torque spanner be made as certain value 2Nm (
3T type screw), mode of operation is the same with checkout procedure and plain screw.
In conjunction with top fundamental diagram the technical program is further described,
It mainly contains two devices the present invention, auxiliary socket and definite value torque spanner:
The creation of auxiliary socket device technique scheme: this cover auxiliary socket is divided into two big series: plain screw sleeve and T type screw sleeve.The plain screw sleeve is divided into series such as different-diameter: M5, M6, M8, M10 again, can select for use according to different production requirements and occasion.This covering device has connected screw and torque spanner dexterously, and compact conformation is made simply, and is easy to use, with low cost, can perform well in the arc stud welding weld strength check of various occasions.
The creativeness of definite value torque spanner is used: torque spanner only was used for detecting the usable range of bolt and nut Tightening moment before this intention was broken through, and it is used in the weld strength that detects the welding corresponding circle of sensation.
Also relate to a kind of stud welding intensity detection method of using above-mentioned pick-up unit, screw or analog are welded on the workpiece 1, form welding corresponding circle of sensation 2 between the two, the auxiliary socket device be enclosed within on screw or the analog and between a gap is arranged, be preferably 0.1 ~ 0.2mm, the definite value torque spanner is inserted in the hole of auxiliary socket device and detect weld strength, the torsion of definite value torque spanner is made as certain value; The operator twists spanner, if can hear spanner " clatter, the tower " sound, and unexpected skidding occurs, then shows the arc stud welding relay of the value of setting less than reality, stops firmly; Take out definite value torque spanner and auxiliary socket device, whether whether inspection screw or analog bend or weld corresponding circle of sensation 2 and tear, if any then defective; Otherwise it is then qualified.Wherein, above-mentioned described auxiliary socket device is auxiliary socket 3 or T jacket tube 6, and described screw or analog are screw 4 or T type screw 5, wherein, auxiliary socket 3 or T jacket tube 6 are provided with a square opening, and the definite value torque spanner inserts this hole and twisting detects weld strength.
Wherein, the torsion of described definite value torque spanner is made as certain value, and its method to set up is: panel thickness H is big more, and then fusion penetration is big more, and thin plate thinks that then welding penetration is thickness of slab; The area S of welding corresponding circle of sensation (2) is screw or analog sectional area; External torque acts on screw or analog, merging edge's shear strength is τ, when shear failure took place, force analysis is as follows: F1 and F2 were that auxiliary socket acts on the power on the screw, its equal and opposite in direction, direction is opposite, form moment M, the size of this moment equals to act on the moment size on the definite value torque spanner, and the shearing force Ft that the weld zone is subjected to plate acts on the whole shear surface, form a moment Mt, and Mt=4 ∫
0 Pi/2H τ (D/2)
2COS θ d θ=H τ D
2As H τ D
2＜Mt or H τ D
2It is qualified and defective that＞Mt is respectively weld strength; Proofread and correct the definite value torsion of confirming torque spanner according to formula and by detecting.
Below the detailed loading process of derivation welding region:
Do following hypothesis earlier, panel thickness H is big more, then fusion penetration is big more, for thin plate, think that welding penetration is thickness of slab, and the area S of corresponding circle of sensation is the screw sectional area, suppose that plate and screw fully merge after, if act on screw with an external torque, shear failure will take place along the edge (face of cylinder) that welding is merged.If merging edge's shear strength is τ, when then shear failure taking place, force analysis is as follows:
As shown in Figure 4: F1 and F2 are that auxiliary socket acts on the power on the screw, its equal and opposite in direction, and direction is opposite, forms moment M, and obviously the size of moment equals to act on the moment size on the definite value torque spanner.Ft represents that the weld zone is subjected to the shearing force of plate, and shearing force acts on the whole shear surface (face of cylinder), also forms a moment, and its size is calculated as follows:
Mt＝4∫
0 π/2H·τ·(D/2)
2·COSθ·dθ
＝HτD
2
This shows that the setting and the thickness of slab of moment size are proportional, square proportional with diameter.Its shear resistance of underproof welding region does not reach requirement, thereby has:
HτD
2＜Mt
At this moment, screw begins to move under the effect of Mt, and screw begins bending or inclination on the one hand, begins between screw and the plate on the other hand to produce to tear, thereby destroys.If
HτD
2＞Mt
At this moment, the definite value torque spanner begins to take off tooth, sends the sound of " clatter tower ", can judge conveniently that thus this stud welding intensity is enough, is qualified.
For different screw series, selecting for use or set up according to top formula of torque spanner torque magnitude again by actual detected and correction, obtains following reference value:
Table 1 plain screw torsion is selected reference table
The selected reference table of table 2T type screw torsion
For special diameter or thickness of slab, can carry out interpolation according to the rule that following theoretical formula is summed up and set up, revise by actual detected again.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (1)
1. stud welding intensity detection method of using the stud welding intensity pick-up unit, it is characterized in that, described stud welding intensity pick-up unit comprises an auxiliary socket device and certain value torque spanner, described auxiliary socket device is used to overlap cartridge screw, and described definite value torque spanner is connected with the auxiliary socket device and is provided with a torsion definite value according to operating mode; Described screw is welded on the workpiece (1), between form welding corresponding circle of sensation (2); The described operating mode that is used for determining the torsion of definite value torque spanner comprises the thickness of slab of screw diameter and workpiece (1); Described auxiliary socket device is a T jacket tube (6), and described screw is a T type screw (5), and wherein, T jacket tube (6) is provided with a hole, and the definite value torque spanner inserts this hole and twisting detects weld strength; The gap that one 0.1～0.2mm is arranged between screw and the auxiliary socket device, the hole on the auxiliary socket device are square opening;
Screw is welded on the workpiece (1), form welding corresponding circle of sensation (2) between the two, the auxiliary socket device be enclosed within on the screw and between a gap is arranged, the definite value torque spanner is inserted in the hole of auxiliary socket device and detects weld strength, the torsion of definite value torque spanner is made as certain value; The operator twists spanner, if can hear spanner " clatter, the tower " sound, and unexpected skidding occurs, then shows the arc stud welding relay of the value of setting less than reality, stops firmly;
Take out definite value torque spanner and auxiliary socket device, whether whether the inspection screw bend or weld corresponding circle of sensation (2) and tear, if any then defective; Otherwise it is then qualified;
The torsion of described definite value torque spanner is made as certain value, and its method to set up is: panel thickness H is big more, and then fusion penetration is big more, and thin plate thinks that then welding penetration is thickness of slab; The area S of welding corresponding circle of sensation (2) is the screw sectional area;
External torque acts on screw, and merging edge's shear strength is τ, and when shear failure took place, force analysis was as follows:
F1 and F2 are that auxiliary socket acts on the power on the screw, its equal and opposite in direction, and direction is opposite, form moment M, the size of this moment equals to act on the moment size on the definite value torque spanner, and the shearing force Ft that the weld zone is subjected to plate acts on the whole shear surface, form a moment Mt, and
Mt＝4∫
0 π/2H·τ·(D/2)
2·COSθ·dθ＝HτD
2
As H τ D
2＜Mt or H τ D
2It is qualified and defective that＞Mt is respectively weld strength;
Proofread and correct the definite value torsion of confirming torque spanner according to formula and by detecting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100230510A CN101368895B (en) | 2008-07-11 | 2008-07-11 | Stud welding intensity detection apparatus and method |
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|---|---|---|---|
| CN2008100230510A CN101368895B (en) | 2008-07-11 | 2008-07-11 | Stud welding intensity detection apparatus and method |
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| CN101368895A CN101368895A (en) | 2009-02-18 |
| CN101368895B true CN101368895B (en) | 2011-06-08 |
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| CN110031316B (en) * | 2019-03-28 | 2021-09-07 | 福尼斯智能装备(珠海)有限公司 | System for automatically welding and detecting torsion and working method thereof |
| CN110031333B (en) * | 2019-03-28 | 2024-02-09 | 福尼斯智能装备(珠海)有限公司 | The method comprises the following steps of: automatic detection torsion work platform |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053938Y (en) * | 2007-06-27 | 2008-04-30 | 上海交运股份有限公司汽车零部件分公司 | Connection device for stud welding detection |
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2008
- 2008-07-11 CN CN2008100230510A patent/CN101368895B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053938Y (en) * | 2007-06-27 | 2008-04-30 | 上海交运股份有限公司汽车零部件分公司 | Connection device for stud welding detection |
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