CN109840385B - Method for presetting draining holes before coating treatment - Google Patents
Method for presetting draining holes before coating treatment Download PDFInfo
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- CN109840385B CN109840385B CN201910153707.9A CN201910153707A CN109840385B CN 109840385 B CN109840385 B CN 109840385B CN 201910153707 A CN201910153707 A CN 201910153707A CN 109840385 B CN109840385 B CN 109840385B
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- liquid
- leaching
- theoretical
- drain hole
- before coating
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- 239000011248 coating agent Substances 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000002386 leaching Methods 0.000 claims abstract description 25
- 238000001962 electrophoresis Methods 0.000 claims abstract description 7
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a method for presetting a liquid leaching hole before coating treatment, which comprises the following steps: step 1, modeling, namely simulating a situation that a vehicle body structure goes out of a tank at a set angle, making a liquid model in the tank, and obtaining the volume V and the liquid level height H of the liquid model; step 2, collecting leaching time T required by the pretreatment-electrophoresis line, and obtaining theoretical drainage time T according to the leaching time T; step 3, calculating the theoretical drain hole area S according to the liquid volume V, the liquid level height H and the theoretical drain time t; and 4, comparing the theoretical drain hole area S with the actually designed drain hole area S1, and correcting the actually designed drain hole area. The invention evaluates whether the designed leaching holes meet the leaching requirement of the pretreatment-electrophoresis line before coating or not by comparing the leaching hole area calculated theoretically with the leaching hole area designed by data, and avoids the inaccuracy of setting the leaching holes by using experience.
Description
Technical Field
The invention relates to the field of automobile design synchronous engineering, in particular to a technology for analyzing whether a vehicle body design draining hole meets the draining process requirement of a pre-coating treatment-electrophoresis production line in coating synchronous engineering.
Background
During coating synchronous engineering analysis, whether a vehicle body design liquid leakage hole meets the process requirements generally only through experience estimation, and no accurate calculation and check basis exists.
Disclosure of Invention
The technical scheme of the invention solves the problem that the coating synchronous engineering can not accurately analyze whether the liquid draining holes meet the process requirements.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for presetting a liquid draining hole before coating treatment comprises the following steps:
step 1, modeling, namely simulating a situation that a vehicle body structure goes out of a tank at a set angle, making a liquid model in the tank, and obtaining the volume V and the liquid level height H of the liquid model;
step 2, collecting leaching time T required by the pretreatment-electrophoresis line, and obtaining theoretical drainage time T according to the leaching time T;
step 3, calculating the theoretical drain hole area S according to the liquid volume V, the liquid level height H and the theoretical drain time t;
and 4, comparing the theoretical drain hole area S with the actually designed drain hole area S1, and correcting the actually designed drain hole area.
Factors influencing the theoretical drainage time T in the step 2 comprise bath supplement of bath solution at other positions to the calculated position and surface tension of the liquid, and a coefficient K is obtained according to the factors, wherein T = T/K.
The K =1.94.
The step 3 adopts a formula:
In the step 4, when S is larger than S1, the area of the designed drain hole is insufficient and does not meet the actual leaching requirement, and when S is smaller than or equal to S1, the area of the designed drain hole meets the actual leaching requirement.
The invention evaluates whether the designed leaching holes meet the leaching requirement of the pretreatment-electrophoresis line before coating or not by comparing the leaching hole area calculated theoretically with the leaching hole area designed by data, and avoids the inaccuracy of the leaching holes set by experience.
Detailed Description
Step 1, simulating a situation that the vehicle body goes out of the tank at a certain angle according to a vehicle body design digital analog, making a liquid model of which the position needs to be calculated when the vehicle body goes out of the tank, and obtaining a liquid volume V and a liquid level height H.
Step 2, collecting leaching time T required by a pretreatment-electrophoresis line of a production base where the vehicle type is put into production, considering the influence of other influence factors (such as bath liquid supplement of bath liquids at other positions to a calculated position, surface tension of the liquids and the like) on theoretical calculation when leaching is actually produced, and adjusting the time T by adopting a coefficient K to obtain theoretical drainage time T:
t＝T/K(K＝1.94)
and 3, substituting the obtained values of the liquid volume V, the liquid level height H and the theoretical drainage time t into a formula (I):
( g is the gravity acceleration, and 9.8m/s is taken; s is the theoretical drain hole area )
Step 4, comparing the theoretical drain hole area S calculated in the step 3 with the actually designed drain hole area S1;
when S is larger than S1, the area of the designed drain hole is insufficient and does not meet the actual leaching requirement;
and when S is less than or equal to S1, the area of the designed drain hole meets the actual leaching requirement.
Claims (5)
1. A method for presetting a liquid draining hole before coating treatment is characterized by comprising the following steps:
step 1, modeling, namely simulating a situation that a vehicle body structure goes out of a tank at a set angle, making a liquid model in the tank, and obtaining the volume V and the liquid level height H of the liquid model;
step 2, collecting leaching time T required by the pretreatment-electrophoresis line, and obtaining theoretical drainage time T according to the leaching time T;
step 3, calculating the theoretical drain hole area S according to the liquid volume V, the liquid level height H and the theoretical drain time t;
and 4, comparing the theoretical drain hole area S with the actually designed drain hole area S1, and correcting the actually designed drain hole area.
2. The method for presetting the liquid draining hole before coating according to claim 1, wherein: factors influencing the theoretical drainage time T in the step 2 comprise bath supplement of bath solution at other positions to the calculated position and surface tension of the liquid, and a coefficient K is obtained according to the factors, wherein T = T/K.
3. The method for presetting the liquid draining hole before coating according to claim 2, wherein: the K =1.94.
4. The method for presetting draining holes before coating according to claim 1, 2 or 3, wherein: the step 3 adopts a formula:
5. The method for presetting the liquid draining hole before coating according to claim 4, wherein: in the step 4, when S is larger than S1, the area of the designed drain hole is insufficient and does not meet the actual leaching requirement, and when S is smaller than or equal to S1, the area of the designed drain hole meets the actual leaching requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153707.9A CN109840385B (en) | 2019-02-28 | 2019-02-28 | Method for presetting draining holes before coating treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153707.9A CN109840385B (en) | 2019-02-28 | 2019-02-28 | Method for presetting draining holes before coating treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109840385A CN109840385A (en) | 2019-06-04 |
| CN109840385B true CN109840385B (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910153707.9A Active CN109840385B (en) | 2019-02-28 | 2019-02-28 | Method for presetting draining holes before coating treatment |
Country Status (1)
| Country | Link |
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| CN (1) | CN109840385B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112560128B (en) * | 2020-12-08 | 2022-10-21 | 中国第一汽车股份有限公司 | Vehicle body draining posture debugging method, computer equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008071219A (en) * | 2006-09-15 | 2008-03-27 | Fuji Heavy Ind Ltd | Method for simulating immersion liquid discharge time in vehicle body and computer-executable program for executing this simulation method |
| CN104149580A (en) * | 2014-07-30 | 2014-11-19 | 奇瑞汽车股份有限公司 | Automobile door liquid leakage hole manufacture method |
-
2019
- 2019-02-28 CN CN201910153707.9A patent/CN109840385B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008071219A (en) * | 2006-09-15 | 2008-03-27 | Fuji Heavy Ind Ltd | Method for simulating immersion liquid discharge time in vehicle body and computer-executable program for executing this simulation method |
| CN104149580A (en) * | 2014-07-30 | 2014-11-19 | 奇瑞汽车股份有限公司 | Automobile door liquid leakage hole manufacture method |
Non-Patent Citations (2)
| Title |
|---|
| 某车型车身A柱电泳结构的优化;孙玉兵,孙靓,贾雪,王伟;《现代涂料与涂装》;20181120;第21卷(第11期);全文 * |
| 轿车侧门漏液孔尺寸最优设计方法;胡宏等;《机电工程技术》;20141120;第43卷(第11期);全文 * |
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| Publication number | Publication date |
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| CN109840385A (en) | 2019-06-04 |
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