CN113701702A - Pre-forming sample preparation method for evaluating corrugation degree of floating-coating-free automobile panel - Google Patents
Pre-forming sample preparation method for evaluating corrugation degree of floating-coating-free automobile panel Download PDFInfo
- Publication number
- CN113701702A CN113701702A CN202110920188.1A CN202110920188A CN113701702A CN 113701702 A CN113701702 A CN 113701702A CN 202110920188 A CN202110920188 A CN 202110920188A CN 113701702 A CN113701702 A CN 113701702A
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- China
- Prior art keywords
- coating
- vaseline
- sample
- evaluating
- floating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005464 sample preparation method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 229940099259 vaseline Drugs 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000010892 electric spark Methods 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000010008 shearing Methods 0.000 abstract description 4
- 239000002893 slag Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002173 cutting fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
Abstract
The invention discloses a pre-forming sample preparation method for evaluating the waviness of a floating-coating-free automobile panel, which comprises the following steps of: 1) coating vaseline on the surface of a steel plate of a cut sample; 2) overlapping a plurality of steel plates coated with vaseline; 3) carrying out electric spark cutting on a plurality of steel plates which are overlapped together; 4) cleaning the surface of the cut preformed corrugation degree sample by using absolute ethyl alcohol; according to the pre-forming sample preparation method for evaluating the corrugation degree of the floating-coating-free automobile panel, which is designed by the invention, a plurality of steel plates are overlapped through vaseline, and compared with a plate shearing machine and direct electric spark cutting, the pre-forming sample preparation method can obtain accurate size and good surface.
Description
Technical Field
The invention relates to the technical field of steel sample preparation, in particular to a preformed sample preparation method for evaluating the waviness of a floating-coating-free automobile panel.
Background
The degree of surface waviness is one of the important indicators for evaluating automobile outer panels, particularly automotive panels free of intercoat coating, and directly affects the appearance effect of the automobile outer panels after painting. With the improvement of the automobile coating process and the strictness of the environmental protection requirement, the thickness of the automobile surface coating is thinner and thinner, which puts requirements on the surface appearance of the steel plate, wherein the index directly influencing the appearance effect of the painted automobile outer plate is the waviness.
In order to test the waviness of the steel plate after forming, detailed requirements are made on a steel plate waviness test method and a sample size after forming according to the automobile industry standard. The sample is octagonal, the size is shown in figure 1, the sample with accurate size is difficult to obtain by using a plate shearing machine, burrs are formed at the cut of a steel plate machined by the plate shearing machine, and the punching die can be damaged in the punching forming process in the subsequent testing process. The cutting by the electric spark machine can accurately control the size of the sample through programming, but the cutting fluid and splashed slag are accompanied, the slag and the cutting fluid can pollute the surface of the sample, and the slag adhered to the surface of the steel plate in the wiping process can cause scratches and seriously affect the surface waviness test.
Therefore, a pre-forming sample preparation method for evaluating the corrugation degree of the floating-coating-free automobile panel is needed to be designed, so that the problems that burrs exist at a cutting opening and the surface of a steel plate is easily scratched when the steel plate is sampled by testing the corrugation degree of the steel plate in the prior art are solved.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a method for preparing a preformed sample for evaluating the waviness of an automobile panel without middle coating.
The technical scheme adopted by the invention for solving the technical problems is as follows: a pre-forming sample preparation method for evaluating the waviness of a floating-coating-free automobile panel comprises the following steps:
1) coating vaseline on the surface of a steel plate of a cut sample;
2) overlapping a plurality of steel plates coated with vaseline;
3) carrying out electric spark cutting on a plurality of steel plates which are overlapped together;
4) and cleaning the surface of the cut preformed corrugation sample by using absolute ethyl alcohol.
Specifically, the vaseline in the step 1) is coated on the surface of the steel plate to form a ring shape with the outer diameter of 180-200 mm and the inner diameter of 150-170 mm.
Specifically, the steel plate stacking in the step 2) is to stack a plurality of steel plates in a manner that the circle centers of the vaseline rings coincide with each other.
Specifically, in the electric spark cutting in the step 3), the electric spark cutting is performed by taking the circular shape of the vaseline coated in the step 1) as a sample center, and an electric spark wire cutting machine is adopted for the electric spark cutting.
The invention has the following beneficial effects:
according to the pre-forming sample preparation method for evaluating the waviness of the floating-coating-free automobile panel, a plurality of steel plates are overlapped through vaseline, and compared with a plate shearing machine and direct electric spark cutting, the pre-forming sample preparation method can obtain accurate size and good surface; the cutting is carried out by taking the ring of the vaseline as the center, the cutting precision is higher, the cut has no burrs, a plurality of steel plates are cut simultaneously, the surfaces of the steel plates are prevented from being scratched when the surfaces of the samples are polluted by slag and cutting fluid to cause wiping, and the sample preparation efficiency is improved.
Drawings
FIG. 1 is a schematic view of the structure of an automobile panel sample.
FIG. 2 is a top view of a preform specimen cut to evaluate floating-in automotive panel waviness.
FIG. 3 is a side view of a preform coupon cut to evaluate floating auto panel waviness.
In the figure: 1-a steel plate; 2-vaseline; 3-spark cutting contour line.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in further detail in the following clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
2-3, a method for preparing a pre-formed sample for evaluating the waviness of an uncoated automobile panel comprises the following steps:
1) coating vaseline on the surface of a steel plate to be cut into a sample;
2) overlapping a plurality of steel plates coated with vaseline;
3) carrying out electric spark cutting on a plurality of steel plates which are overlapped together;
4) and cleaning the surface of the cut preformed corrugation sample by using absolute ethyl alcohol.
And (2) coating vaseline in the step 1) on the surface of the steel plate to form a circular ring shape with the outer diameter of 180-200 mm and the inner diameter of 150-170 mm, as shown in figure 2.
The steel plate stacking in the step 2) is to stack a plurality of steel plates in a manner that the circle centers of the vaseline rings coincide with each other, as shown in fig. 3.
And 3) performing electric spark cutting in the step 3) by taking the circular shape of the vaseline smeared in the step 1) as a sample center, wherein an electric spark wire cutting machine is adopted for the electric spark cutting.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (4)
1. A pre-forming sample preparation method for evaluating the corrugation degree of a floating-coating-free automobile panel is characterized by comprising the following steps:
1) coating vaseline on the surface of a steel plate of a cut sample;
2) overlapping a plurality of steel plates coated with vaseline;
3) carrying out electric spark cutting on a plurality of steel plates which are overlapped together;
4) and cleaning the surface of the cut preformed corrugation sample by using absolute ethyl alcohol.
2. The method for preparing the preformed sample for evaluating the corrugating degree of the floating-coating-free automobile panel according to claim 1, wherein vaseline in the step 1) is coated on the surface of a steel plate to form a circular ring shape with the outer diameter of 180-200 mm and the inner diameter of 150-170 mm.
3. The method for preparing a preformed sample for evaluating the waviness of the floating-coating-free automobile panel according to claim 1, wherein the steel plates in the step 2) are stacked in such a manner that the centers of the respective vaseline rings coincide with each other.
4. The method for preparing the preformed sample for evaluating the waviness of the floating-in-place automobile panel according to claim 1, wherein the electric spark cutting in the step 3) is carried out by taking the circular ring shape of the vaseline coated in the step 1) as a sample center, and the electric spark cutting is carried out by a wire electric discharge machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920188.1A CN113701702A (en) | 2021-08-11 | 2021-08-11 | Pre-forming sample preparation method for evaluating corrugation degree of floating-coating-free automobile panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110920188.1A CN113701702A (en) | 2021-08-11 | 2021-08-11 | Pre-forming sample preparation method for evaluating corrugation degree of floating-coating-free automobile panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113701702A true CN113701702A (en) | 2021-11-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110920188.1A Pending CN113701702A (en) | 2021-08-11 | 2021-08-11 | Pre-forming sample preparation method for evaluating corrugation degree of floating-coating-free automobile panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113701702A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007123914A (en) * | 2006-11-27 | 2007-05-17 | Nitto Denko Corp | Dicing die bond film |
| CN103185676A (en) * | 2011-12-27 | 2013-07-03 | 国家纳米技术与工程研究院 | Sample preparation method for fracture of tungsten carbide coating on magnesium-alloy surface via scanning electron microscope |
| JP2013167565A (en) * | 2012-02-16 | 2013-08-29 | Nippon Steel & Sumitomo Metal | Thin sample preparation device and thin sample preparation method |
| CN103926132A (en) * | 2014-04-30 | 2014-07-16 | 厦门大学 | Hard alloy cutter surface coating etchant and application method thereof |
| CN105004588A (en) * | 2015-07-10 | 2015-10-28 | 首钢总公司 | Alloy-galvanized layer scanning electron microscope sectioned sample precision making method |
| CN108022836A (en) * | 2016-10-31 | 2018-05-11 | 中芯国际集成电路制造(上海)有限公司 | A kind of Ginding process of multiple-level stack wafer |
| CN207623618U (en) * | 2017-12-14 | 2018-07-17 | 北京安航达科技有限公司 | A kind of laser lens environmental control system based on air cushion cavity |
| CN108956338A (en) * | 2018-04-25 | 2018-12-07 | 马鞍山钢铁股份有限公司 | A kind of experimental method for evaluating laser assembly solder plate welding seam toughness |
| CN109425698A (en) * | 2017-08-23 | 2019-03-05 | 宝山钢铁股份有限公司 | The quick pre-judging method of coating presentation quality after a kind of steel formability |
| CN209280468U (en) * | 2018-11-07 | 2019-08-20 | 宁波交通工程咨询监理有限公司 | A kind of agent on crack resistance of concrete compression tester that preventing scrap splashes |
-
2021
- 2021-08-11 CN CN202110920188.1A patent/CN113701702A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007123914A (en) * | 2006-11-27 | 2007-05-17 | Nitto Denko Corp | Dicing die bond film |
| CN103185676A (en) * | 2011-12-27 | 2013-07-03 | 国家纳米技术与工程研究院 | Sample preparation method for fracture of tungsten carbide coating on magnesium-alloy surface via scanning electron microscope |
| JP2013167565A (en) * | 2012-02-16 | 2013-08-29 | Nippon Steel & Sumitomo Metal | Thin sample preparation device and thin sample preparation method |
| CN103926132A (en) * | 2014-04-30 | 2014-07-16 | 厦门大学 | Hard alloy cutter surface coating etchant and application method thereof |
| CN105004588A (en) * | 2015-07-10 | 2015-10-28 | 首钢总公司 | Alloy-galvanized layer scanning electron microscope sectioned sample precision making method |
| CN108022836A (en) * | 2016-10-31 | 2018-05-11 | 中芯国际集成电路制造(上海)有限公司 | A kind of Ginding process of multiple-level stack wafer |
| CN109425698A (en) * | 2017-08-23 | 2019-03-05 | 宝山钢铁股份有限公司 | The quick pre-judging method of coating presentation quality after a kind of steel formability |
| CN207623618U (en) * | 2017-12-14 | 2018-07-17 | 北京安航达科技有限公司 | A kind of laser lens environmental control system based on air cushion cavity |
| CN108956338A (en) * | 2018-04-25 | 2018-12-07 | 马鞍山钢铁股份有限公司 | A kind of experimental method for evaluating laser assembly solder plate welding seam toughness |
| CN209280468U (en) * | 2018-11-07 | 2019-08-20 | 宁波交通工程咨询监理有限公司 | A kind of agent on crack resistance of concrete compression tester that preventing scrap splashes |
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