CN100473971C - Apparatus and method for testing coherence of steel sheet zinc coating - Google Patents
Apparatus and method for testing coherence of steel sheet zinc coating Download PDFInfo
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- CN100473971C CN100473971C CNB2004100668739A CN200410066873A CN100473971C CN 100473971 C CN100473971 C CN 100473971C CN B2004100668739 A CNB2004100668739 A CN B2004100668739A CN 200410066873 A CN200410066873 A CN 200410066873A CN 100473971 C CN100473971 C CN 100473971C
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Abstract
The invention to a steel plate zinc layer adhesiveness test device and method. The device comprises: an up-and-down die and a base, wherein the up die comprises a pressure material side and a drawing sling strip pressure head; the down die comprises left die and right die; the base is like a hill, the center of the center plate justifies to the center of the drawing sling strip pressure head; the right die and the left die are positioned on the two sides deck place. The method comprises the following steps: preparing course including: washing and weighting the steel plate zinc layer sample, positioning the sample into the device, drawing them twice, doing weight-loss method analysis or observation method analysis to the surface of the sample to obtain the adhesiveness of the steel plate zinc layer sample.
Description
Technical field
The present invention relates to a kind of coherence of steel sheet zinc coating test unit and method thereof, specifically, relate to a kind of test unit and method thereof of measuring the bead clearance control of coherence of the zinc coating under the punching press state of simulating.
Background technology
Along with rapid development of automobile industry, galvanized steel plain sheet is all having rapid progress aspect output, kind and the quality, range of application constantly enlarges, in developed country, automobile reaches 2/3rds of sheet steel consumption approximately with galvanized steel plain sheet, and cars such as the Audi of China's introduction at present, Buick, Citroen zx also require to adopt a considerable amount of galvanized steel plain sheets respectively.
Automobile comprises two aspects with the galvanized steel plain sheet formability, the one, and galvanized steel plain sheet (substrate) adapts to the ability of various shaping process, mainly by basic forming property and the examination of simulation forming index.The 2nd, galvanized steel plain sheet zinc layer adapts to the ability of various shaping processing, mainly by various coherence of the zinc coating test assessments.
Zinc layer and substrate in conjunction with tack and surperficial burnish resistance, this binomial index general designation adhesiveness is an important indicator of examination galvanized steel plain sheet formability.When being shaped such as poor adhesion, crisp matter zinc layer can produce the come off phenomenon of (efflorescence) of powdery, soft zinc layer can stick to die surface and be the come off phenomenon of (flakey) of small pieces, like this, reduced the corrosion resistance of stamping parts on the one hand, on the other hand, the zinc strata that comes off collection, again stick to stamping parts surface or die surface, the stamping parts qualification rate is reduced.Because the galvanized steel plain sheet coherence of the zinc coating will directly influence its forming property, therefore check the galvanized steel plain sheet coherence of the zinc coating significant.
Industrial traditional adhering test of evaluation galvanized steel zinc laminate has: crease-flex test, pellet impact test and bending test etc., but the coherence of the zinc coating of special folding, impact and bending process process has only been simulated in above-mentioned test, and can not reflect galvanized steel plain sheet in punching course shaping and friction to the combined influence of coherence of the zinc coating.
External industrially developed country, in the automobile development stage, the galvanized steel plain sheet that will adopt is carried out strict qualification authentication, one of them is a coherence of the zinc coating, such as, General Motors Overseas Corporation has developed testing equipment and the corresponding evaluation coherence of the zinc coating test standard (GM9052P) that can simulate the Zinc-coated steel-plated punch process according to the long-term production experience.
Domestic galvanized steel plain sheet is used on automobile and is started late, the general mensuration that adopts traditional simulation test galvanized steel plain sheet to be carried out coherence of the zinc coating, in recent years, producer is also arranged in research novel simulated test facility and method, so that coherence of the zinc coating is measured more approaching reality, bend test etc. as " V " shape mould.
Although the test method of a lot of evaluation galvanized steel plain sheet coherence of the zinc coating is arranged both at home and abroad, but its limitation is arranged all, as crease-flex test, pellet impact test and bending test, the curved test of " V " shape mould etc., can only simulate the coherence of the zinc coating of special folding, impact and bending process process, general GM9052P does not consider that thickness of slab is to the influence of fixed mould and process of the test man's activity or the like.
Summary of the invention
The present invention proposes a kind of coherence of steel sheet zinc coating test unit and method thereof, its process of the test can be avoided human intervention, and its test findings can be reacted galvanized steel plain sheet and is shaped in punching course and rub to the coherence of the zinc coating combined influence.
For achieving the above object, a kind of coherence of steel sheet zinc coating test unit provided by the invention, it comprises: upper and lower mould and base;
Described mold comprises binder surface and bead bar shaped pressure head, this binder surface and bead bar shaped pressure head adopt inlays setting, when bead bar shaped pressure head produces wearing and tearing, perhaps need to increase and decrease bead bar shaped fall head, or bead bar shaped pressure head be need change shape the time, for convenience detach changing; The side of this binder surface is the circular arc chamfering shape, scrapes owing to the unsmooth zinc layer that produces of steel sheet zinc coating sample avoiding;
Two moulds about described bed die comprises, they can be according to the different thicknesss of slab of steel sheet zinc coating sample, and the arc radius corresponding to the bead bar shaped pressure head of mold carries out the adjustment of bead gap; Side of two moulds is the circular arc chamfering shape about this, scrapes owing to the unsmooth zinc layer that produces of steel sheet zinc coating sample avoiding;
Described base is " mountain " font, the center-aligned of the center of the middle center plate washer that protrudes and the bead bar shaped pressure head of mold, the recessed part of the right and left place described bed die about two moulds; Described base each side be provided with two bed die set bolts, bed die is fixed;
Described base also comprises the side plate washer, it is separately positioned on the both sides, front and back of base, this side plate washer exceeds certain distance than bed die, make mold in test, push down the side plate washer, and the discord bed die contacts, and makes and remains certain distance (being the distance that the side plate washer exceeds bed die) between the upper and lower mould, and the pressure surface material of mould carries out the gap adjustment according to the thickness of slab of steel sheet zinc coating sample about can making like this.
Further, between base center plate washer and left and right sides bed die, between side plate washer and base, pad is set.
Coherence of steel sheet zinc coating test unit provided by the invention makes and leaves the axial and horizontal space position that certain test steel sheet zinc coating sample needs between the upper and lower mould; The bead bar shaped pressure head of mold is replaceable simultaneously, can reduce consumption, the expanding test kind; The bead of simulated automotive factory actual mould makes the more approaching reality of test; Bed die can carry out the adjustment of bead gap according to the sample thickness of slab, makes the different-thickness test findings have comparability; Upper and lower mould binder surface has plate washer to carry out clearance control, the efficiency test area inequality of avoiding pressure control to cause.
Coherence of steel sheet zinc coating test method provided by the invention comprises following steps:
1, set-up procedure: the burr that 1. removes steel sheet zinc coating sample edge with the burr machine; 2. with the Cleaning cloth scrub steel sheet zinc coating sample that speckles with ethanol; 3. contain the ultrasonic tank of ethanol in the steel sheet zinc coating sample being placed and clean, carry out degreasing; 4. use electronic balance that the steel sheet zinc coating sample is repeatedly weighed, and record; 5. adopt of efficiency test area place's oiling of submergence mode to the steel sheet zinc coating specimen length; 6. on the airing specimen mounting, the steel sheet zinc coating sample is vertically placed, it is drained; 7. with ethanol cleaning bead mould; 8. according to the steel sheet zinc coating sample thickness, with the center pad, lower gasket places the bead mould, and fixing.
2, test operation process: 1. the steel sheet zinc coating sample is placed in the middle of the upper and lower mould, mold is applied certain normal pressure, make mold and bed die closure; Sample is formed with bead bar shaped pressure head have the circular-arc of same radius, finish once and draw; 3. unclamp upper and lower mould, take out sample, observe specimen surface; 4. 2. later step in the revision test set-up procedure is chosen the efficiency test area again to this steel sheet zinc coating sample, and it is exerted pressure, and sample is formed with bead bar shaped pressure head have the circular-arc of same radius, finishes once and draws; 5. unclamp mould, take out sample, observe specimen surface; 6. 2. arrive step 4. during revision test is prepared.
3, test findings is handled:
1. adopt the weight-loss method analysis: the method during the steel sheet zinc coating sample that will carry out drawing for twice is prepared by test is carried out the sample cleaning; Steel sheet zinc coating sample after using electronic balance to test carries out three times weighs, and record; By sample weight before and after the test, calculate the weightless value of sample.
2. adopt the analysis of morphology observation method: the steel sheet zinc coating sample to having carried out drawing for twice is adjacent to test place with adhesive tape; Adhesive tape with test place is affixed on blank sheet of paper, to write down this place's pattern, so that relatively use; Also available camera carries out the pattern record to the test site, compares with test front spring zinc layer sample.
If the dezincify amount of test back steel sheet zinc coating sample is more, illustrate that then its coherence of steel sheet zinc coating is poor, if the dezincify amount of test back steel sheet zinc coating sample is less, illustrate that then its coherence of steel sheet zinc coating is relatively good.
Coherence of steel sheet zinc coating test method provided by the invention, stringency of test height, good reproducibility, more approaching reality is towards state, and its authenticity, comparability have had reliable assurance.Be particularly suitable for the test of automobile with the galvanized sheet metal coherence of the zinc coating.
Coherence of steel sheet zinc coating test unit that patent of the present invention provides and method thereof are different from traditional coherence of the zinc coating evaluation method, reflected that automobile factory's galvanized steel plain sheet is shaped, rubs the combined influence of galvanized steel plain sheet coherence of the zinc coating in punching course, satisfied scientific research, the needs of user's technical support have been filled up domestic and international blank.
Description of drawings
Fig. 1 is the Facad structure synoptic diagram of light plate coherence of the zinc coating test unit of the present invention;
Fig. 2 is the side structure synoptic diagram of light plate coherence of the zinc coating test unit of the present invention;
Fig. 3 is the synoptic diagram of the steel sheet zinc coating sample after testing among the present invention.
Embodiment
Following according to Fig. 1 and Fig. 2, preferred forms of the present invention is described.
As shown in Figure 1, be the Facad structure synoptic diagram of light plate coherence of the zinc coating test unit of the present invention, as shown in Figure 2, be the side structure synoptic diagram of invention light plate coherence of the zinc coating test unit, it comprises: mold 101, bed die 102 and base 103;
Described mold 101 comprises binder surface 1011 and bead bar shaped pressure head 1012, this binder surface and 1011 bead bar shaped pressure heads 1012 adopt inlays setting, when bead bar shaped pressure head 1012 produces wearing and tearing, perhaps need to increase and decrease bead bar shaped pressure head 1012 height, or bead bar shaped pressure head 1012 is when needing to change shapes, for convenience detach changing; It is two kinds of 1.6mm and 3.0mm that this bead bar shaped pressure head 1012 is respectively arranged with arc radius; The side of this binder surface 1011 is the circular arc chamfering shape, to avoid scraping (not illustrating in the drawings) owing to the unsmooth zinc layer that produces of steel sheet zinc coating sample 2;
Two moulds 1021 and 1022 about described bed die 102 comprises, they can be according to the different thicknesss of slab of steel sheet zinc coating sample, and the arc radius corresponding to the bead bar shaped pressure head 1012 of mold 101 carries out the adjustment of bead gap; Two moulds 1021 and 1022 side are the circular arc chamfering shape about this, scrape owing to the unsmooth zinc layer that produces of steel sheet zinc coating sample 2 avoiding;
Described base 103 is " mountain " font, the center-aligned of the center of the middle center plate washer 1031 that protrudes and the bead bar shaped pressure head 1012 of mold 101, and this plate washer left and right sides, center all has more 0.1mm than the diameter of the bead bar shaped pressure head of mold; When making bed die and center plate washer closed, the gap at bead place is than the big 0.2mm of bead bar shaped pressure head diameter of mold, and is similar with reality; The recessed part of the right and left place described bed die about two moulds 1021 and 1022; Described base 103 each side be provided with two bed die set bolts 1032, bed die 102 is fixed;
Described base 103 also comprises side plate washer 1033, it is separately positioned on the both sides, front and back of base 103, this side plate washer 1033 exceeds 0.1mm than bed die 102, make mold 101 in test, push down side plate washer 1033, and discord bed die 102 contacts, and makes and remains 0.1mm between upper and lower mould 101 and 102, and the pressure surface material of mould carries out the gap adjustment according to the thickness of slab of steel sheet zinc coating sample 2 about can making like this.
Further, between the center of base 103 plate washer 1031 and left and right sides bed die 1021,1022, between side plate washer 1033 and base 103, pad 1034 is set.
Coherence of steel sheet zinc coating test unit provided by the invention makes and leaves the axial and horizontal space position that certain test steel sheet zinc coating sample needs between the upper and lower mould 101,102; The bead bar shaped pressure head 1012 of mold 101 is replaceable simultaneously, can reduce consumption, the expanding test kind; The bead of simulated automotive factory actual mould makes the more approaching reality of test; Bed die 102 can carry out the adjustment of bead gap according to the sample thickness of slab, makes the different-thickness test findings have comparability; The binder surface of upper and lower mould has plate washer to carry out clearance control, the efficiency test area inequality of avoiding pressure control to cause.
Coherence of steel sheet zinc coating test method provided by the invention comprises following steps:
1, set-up procedure: the burr that 1. removes steel sheet zinc coating sample edge with the burr machine; 2. with the Cleaning cloth scrub steel sheet zinc coating sample that speckles with ethanol; 3. contain the ultrasonic tank of ethanol in the steel sheet zinc coating sample being placed and cleaned 5 minutes, carry out degreasing; 4. use electronic balance that the steel sheet zinc coating sample is repeatedly weighed, and record; 5. adopt the submergence mode to efficiency test area place's oiling of steel sheet zinc coating specimen length (be approximately steel sheet zinc coating sample 1/2); 6. on the airing specimen mounting, the steel sheet zinc coating sample is vertically placed more than 2 hours, it is drained; 7. with ethanol cleaning bead mould; 8. according to the steel sheet zinc coating sample thickness, with the center pad, lower gasket places the bead mould, and fixing.
2, test operation process: 1. the steel sheet zinc coating sample is placed in the middle of the upper and lower mould, mold is applied the normal pressure of 10kN, make mold and bed die closure; 2. formation has the circular-arc of same radius with bead bar shaped pressure head, finishes once and draws; 3. unclamp upper and lower mould, take out sample, observe specimen surface A (seeing also Fig. 3); 4. 2. later step in the revision test set-up procedure is chosen the efficiency test area again to this steel sheet zinc coating sample, and it is exerted pressure, and forms with bead bar shaped pressure head to have the circular-arc of same radius, finishes once and draws; 5. unclamp mould, take out sample, observe specimen surface B (seeing also Fig. 3); 6. 2. arrive step 4. during revision test is prepared.
3, test findings is handled:
1. adopt the weight-loss method analysis: the method during the steel sheet zinc coating sample that will carry out drawing for twice is prepared by test is carried out the sample cleaning; Steel sheet zinc coating sample after using electronic balance to test carries out three times weighs, and record; By sample weight before and after the test, calculate the weightless value of sample.
2. adopt the analysis of morphology observation method: the steel sheet zinc coating sample to having carried out drawing for twice is adjacent to test place with adhesive tape; Adhesive tape with test place is affixed on blank sheet of paper, to write down this place's pattern, so that relatively use; Also available camera carries out the pattern record to the test site, compares with test front spring zinc layer sample.
If the dezincify amount of test back steel sheet zinc coating sample is more, illustrate that then its coherence of steel sheet zinc coating is poor, if the dezincify amount of test back steel sheet zinc coating sample is less, illustrate that then its coherence of steel sheet zinc coating is relatively good.
Coherence of steel sheet zinc coating test method provided by the invention, stringency of test height, good reproducibility, more approaching reality is towards state, and its authenticity, comparability have had reliable assurance.Be particularly suitable for the test of automobile with the galvanized sheet metal coherence of the zinc coating.
Coherence of steel sheet zinc coating test unit that patent of the present invention provides and method thereof are different from traditional coherence of the zinc coating evaluation method, reflected that automobile factory's galvanized steel plain sheet is shaped, rubs the combined influence of galvanized steel plain sheet coherence of the zinc coating in punching course, satisfied scientific research, the needs of user's technical support have been filled up domestic and international blank.
Claims (8)
1, a kind of coherence of steel sheet zinc coating test unit, it comprises upper and lower mould and base, is characterised in that,
Described mold comprises binder surface and bead bar shaped pressure head, and this binder surface and bead bar shaped pressure head adopt inlays setting;
Two moulds about described bed die comprises;
Described base is " mountain " font, the center-aligned of the center of the center plate washer that protrudes in the middle of it and the bead bar shaped pressure head of mold, the recessed part of the right and left place described bed die about two moulds.
2, coherence of steel sheet zinc coating test unit as claimed in claim 1 is characterized in that, the binder surface of described mold, and in the bed die about the side of two moulds all be the circular arc chamfering shape.
3, coherence of steel sheet zinc coating test unit as claimed in claim 1 or 2 is characterized in that, described base each side be provided with the bed die set bolt.
4, coherence of steel sheet zinc coating test unit as claimed in claim 3 is characterized in that, the plate washer left and right sides, described center all has more 0.1mm than the diameter of the bead bar shaped pressure head of mold.
5, coherence of steel sheet zinc coating test unit as claimed in claim 1 is characterized in that, described base also comprises the side plate washer, and it is separately positioned on the both sides, front and back of base, and this side plate washer exceeds 0.1mm than bed die.
6, coherence of steel sheet zinc coating test unit as claimed in claim 1 is characterized in that, between base center plate washer and left and right sides mould, is provided with pad between side plate washer and base.
7, a kind of method of utilizing the described coherence of steel sheet zinc coating test unit of claim 1 to carry out the coherence of steel sheet zinc coating test, it comprises following steps:
A. set-up procedure: the burr that removes steel sheet zinc coating sample edge; Wiping steel sheet zinc coating sample; The steel sheet zinc coating sample is carried out degreasing; Use electronic balance that the steel sheet zinc coating sample is repeatedly weighed, and record; Efficiency test area place's oiling to the steel sheet zinc coating specimen length; Drain the steel sheet zinc coating sample; Cleaning bead mould; According to the steel sheet zinc coating sample thickness, with the center pad, lower gasket places the bead mould, and fixing;
B. test operation process: the steel sheet zinc coating sample is placed in the middle of the upper and lower mould, mold is applied certain normal pressure, make mold and bed die closure, sample is formed with bead bar shaped pressure head have the circular-arc of same radius, finish once and draw; Unclamp upper and lower mould, take out sample; The later step of wiping steel sheet zinc coating sample in the revision test set-up procedure, this steel sheet zinc coating sample is chosen the efficiency test area again, and it is exerted pressure, sample is formed with bead bar shaped pressure head again have the circular-arc of same radius, finish once again and draw; Unclamp mould, take out sample;
C. adopt the weight-loss method analysis: the steel sheet zinc coating sample that will carry out drawing for twice carries out the sample cleaning; Steel sheet zinc coating sample after using electronic balance to test carries out three times weighs, and record; By sample weight before and after the test, calculate the weightless value of sample, record the adhesiveness of steel sheet zinc coating;
D. adopt the analysis of morphology observation method: to the steel sheet zinc coating sample that has carried out drawing for twice, compare, record the adhesiveness of steel sheet zinc coating with test front spring zinc layer sample.
8, the method for coherence of steel sheet zinc coating as claimed in claim 7 test is characterized in that, among the step D, adopts the analysis of morphology observation method to be meant: be adjacent to test place of having carried out the steel sheet zinc coating sample that draws for twice with adhesive tape; Adhesive tape with test place is affixed on blank sheet of paper, writes down this place's pattern; Or use camera that the test site is carried out the pattern record.
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| CN103969179B (en) * | 2013-01-25 | 2016-06-01 | 宝山钢铁股份有限公司 | The detection method of steel plate coating tack |
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| CN103674834A (en) * | 2013-12-04 | 2014-03-26 | 武汉钢铁(集团)公司 | Rapid detection method for surface oxide scale adhesion of hot rolling strip steel |
| CN107063998B (en) * | 2015-06-16 | 2019-04-23 | 安徽工业大学 | A kind of coating non-adhesion behavior detection method |
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| CN108405733A (en) * | 2018-04-27 | 2018-08-17 | 唐山钢铁集团有限责任公司 | A kind of diel for detecting hot press-formed steel plate coating adhesive force |
| CN108931424B (en) * | 2018-05-27 | 2020-06-16 | 中南大学 | Testing device and evaluation method for bonding strength of ultrathin laminar metal composite material |
| CN110398438A (en) * | 2019-09-05 | 2019-11-01 | 中国烟草总公司郑州烟草研究院 | A kind of method and detection device for evaluating paper-making method reproduced tobacco leaf tobacco powder adhesion |
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| GB1203991A (en) * | 1967-05-26 | 1970-09-03 | Prec Presswork Co Ltd | Improvements in or relating to the bending of sheet metal |
| CN1342532A (en) * | 2001-10-09 | 2002-04-03 | 湖南大学 | Drawing die for forming metallic sheet by punching |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1203991A (en) * | 1967-05-26 | 1970-09-03 | Prec Presswork Co Ltd | Improvements in or relating to the bending of sheet metal |
| CN1342532A (en) * | 2001-10-09 | 2002-04-03 | 湖南大学 | Drawing die for forming metallic sheet by punching |
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