CN111733314A - Reinforcing method for outer panel of vehicle door - Google Patents
Reinforcing method for outer panel of vehicle door Download PDFInfo
- Publication number
- CN111733314A CN111733314A CN201910227010.1A CN201910227010A CN111733314A CN 111733314 A CN111733314 A CN 111733314A CN 201910227010 A CN201910227010 A CN 201910227010A CN 111733314 A CN111733314 A CN 111733314A
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- Prior art keywords
- outer panel
- weak part
- laser
- scanning
- reinforcing method
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a strengthening method for a vehicle door outer panel, which comprises the following steps: scanning and heating a weak part of the molded outer plate of the vehicle door by using laser to heat the weak part to be above the phase transformation point of the weak part and lower than the melting point of the weak part; cooling and scanning the heated door outer panel to quench and harden the weak part of the door outer panel; wherein the temperature for scanning and heating by the laser is 800-850 ℃, and the power of the laser is 800-900W. The reinforcing method can better harden and reinforce the weak part of the outer plate of the vehicle door, can permanently change the performance of the weak part, can permanently improve the strength and rigidity of the weak part, and has no risk of reducing the strength and rigidity.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a reinforcing method for a vehicle door outer plate.
Background
The traditional method for reinforcing the weak part of the outer plate of the vehicle door is to paste a reinforcing rubber plate on the inner surface of the weak part or increase a metal plate supporting structure, the method is heavy in weight, poor in economical efficiency and difficult in manual operation, the reinforcing rubber plate is easy to fall off in the low-temperature or vehicle running vibration process, the performance of the whole vehicle is affected, and an improvement space exists.
Disclosure of Invention
In view of the above, the present invention is directed to a reinforcement method for a door outer panel, which can better harden and reinforce a weak portion of the door outer panel without the risk of strength and rigidity reduction of the weak portion.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a reinforcement method for a door outer panel: scanning and heating a weak part of the molded outer plate of the vehicle door by using laser to heat the weak part to be above the phase transformation point of the weak part and lower than the melting point of the weak part; cooling and scanning the heated door outer panel to quench and harden the weak part of the door outer panel; wherein the temperature for scanning and heating by the laser is 800-850 ℃, and the power of the laser is 800-900W.
Further, the scanning mode of the laser is a mesh scanning.
Further, the scanning mode of the laser is spot scanning.
Further, the scanning speed of the laser is 5-8 mm/s.
Further, the diameter of the laser spot is 0.5-1 mm.
Furthermore, the grid gap of the mesh scanning is 5-10 mm.
Further, the surface of the weak part is coated with carbon black.
Further, the thickness of the carbon black is not less than 0.1 mm.
Further, the weakened portion has a hardening depth of not more than 1/3 times the thickness of the weakened portion.
Further, the hardened depth of the weak portion is 0.1 to 0.3 mm.
Compared with the prior art, the reinforcing method for the outer panel of the vehicle door has the following advantages:
according to the reinforcing method for the outer door panel, the weak part of the outer door panel can be better hardened and reinforced, the performance of the weak part is permanently changed, the strength and the rigidity of the weak part can be permanently improved, and the risk of reducing the strength and the rigidity is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a reinforcement method for a door outer panel according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
A reinforcing method for a door outer panel according to an embodiment of the present invention is described below with reference to fig. 1.
According to the reinforcing method for the outer panel of the vehicle door of the embodiment of the invention:
firstly, an operator scans and heats a weak part of the molded outer plate of the vehicle door by using laser to heat the temperature of the weak part to be higher than the phase transformation point of the weak part and lower than the melting point of the weak part, so as to heat and harden the weak part under the premise of ensuring that the weak part is not damaged.
The formed outer plate of the vehicle door refers to a complete outer plate of the vehicle door formed by stamping a metal plate, namely, the outer plate is not a sheet metal part or a blank part.
And then, the heated door outer plate needs to be cooled and scanned, so that the weak part of the door outer plate is subjected to final quenching hardening, and the effect of hardening and reinforcing the weak part is achieved.
Wherein, the temperature of heating by laser scanning is 800-. Therefore, the weak part is heated at the temperature and the power so as to achieve the effect of hardening the weak part and not influence the light and shadow effect of the outer surface of the weak part.
According to the reinforcing method for the outer panel of the vehicle door, the reinforcing method can better harden and reinforce the weak part of the outer panel of the vehicle door, permanently change the performance of the weak part, and permanently improve the strength and rigidity of the weak part without the risk of strength and rigidity reduction.
According to some embodiments of the invention, the laser is scanned in a raster scan. The laser adopts a mesh scanning mode to heat the weak part, so that the heating effect on the weak part can be better controlled, and the deformation and damage to the weak part are avoided. Compared with the traditional full-coverage scanning mode, the mesh scanning mode can save electric energy used by laser so as to achieve the purpose of saving energy, and further reduce the overall processing cost of the vehicle door metal plate.
According to some embodiments of the invention, the laser is scanned in a spot scan. The adoption of the point scanning mode can achieve the effect which is nearly the same as the mesh scanning. Namely, the laser heats the weak part in a point scanning mode, so that the heating effect on the weak part can be better controlled, and the deformation and damage to the weak part are avoided. Compared with the traditional full-coverage scanning mode, the spot scanning mode can save more electric energy used by laser so as to achieve the purpose of saving energy and further reduce the overall processing cost of the vehicle door metal plate.
According to some embodiments of the invention, the scanning speed of the laser is 5-8mm/s, the temperature for heating by scanning the laser is 800-.
According to some embodiments of the present invention, the diameter of the laser spot is 0.5-1mm, and the scanning speed of the laser is 5-8mm/s, the temperature of the laser scanning heating is 800-.
As a preferred embodiment, the mesh gap of the mesh scanning is 5-10mm, so that the heating degree of the weak part is well controlled and the weak part is prevented from being deformed and damaged.
According to some embodiments of the invention, the surface of the weakened section is painted with carbon black. Thereby, when the laser heats the weak portion, the carbon black can enter into the weak portion (i.e., the carburizing process). Thereby, the strength and rigidity of the weak portion can be further increased to enhance the reinforcing effect of the weak portion.
As a preferable example, the thickness of carbon black is not less than 0.1mm to ensure the carburizing effect and thus the reinforcing effect of the weak portion.
According to some embodiments of the invention, the hardening depth of the weak part does not exceed 1/3 of the thickness of the weak part, so that the heating hardening depth of the weak part is well controlled and deformation damage to the weak part is avoided.
As a preferred embodiment, the hardened depth of the weak portion is 0.1 to 0.3 mm. Thus, controlling the hardening depth within this range can avoid deformation damage to the weak portion.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A reinforcing method for a door outer panel,
scanning and heating a weak part of the molded outer plate of the vehicle door by using laser to heat the weak part to be above the phase transformation point of the weak part and lower than the melting point of the weak part;
cooling and scanning the heated door outer panel to quench and harden the weak part of the door outer panel;
wherein the temperature for scanning and heating by the laser is 800-850 ℃, and the power of the laser is 800-900W.
2. A reinforcing method for a door outer panel according to claim 1, wherein the scanning manner of the laser is a web scan.
3. A reinforcing method for a door outer panel according to claim 1, wherein the scanning manner of the laser is spot scanning.
4. A reinforcing method for an outer panel of a door of a vehicle as set forth in claim 1, wherein a scanning speed of said laser is 5-8 mm/s.
5. A reinforcing method for an outer panel of a door as claimed in claim 1, wherein a diameter size of a spot of said laser light is 0.5 to 1 mm.
6. A reinforcing method for an outer panel of a vehicle door as claimed in claim 2, wherein a mesh gap of said mesh scan is 5-10 mm.
7. A reinforcing method for a door outer panel according to claim 1, wherein a surface of the weak portion is painted with carbon black.
8. A reinforcing method for a door outer panel according to claim 7, wherein the thickness of the carbon black is not less than 0.1 mm.
9. A reinforcing method for a door outer panel according to claim 1, wherein a hardening depth of said weak portion is not more than 1/3 of a thickness of said weak portion.
10. A reinforcing method for a door outer panel according to claim 9, wherein the hardened depth of the weak portion is 0.1 to 0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227010.1A CN111733314A (en) | 2019-03-25 | 2019-03-25 | Reinforcing method for outer panel of vehicle door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227010.1A CN111733314A (en) | 2019-03-25 | 2019-03-25 | Reinforcing method for outer panel of vehicle door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111733314A true CN111733314A (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910227010.1A Pending CN111733314A (en) | 2019-03-25 | 2019-03-25 | Reinforcing method for outer panel of vehicle door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111733314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114475796A (en) * | 2022-02-11 | 2022-05-13 | 湖州师范学院 | Method for improving vehicle B-pillar deformation resistance strength |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103703152A (en) * | 2011-07-25 | 2014-04-02 | 麦格纳国际公司 | Product and process by localized heat treatment of sheet steel |
| CN103842527A (en) * | 2011-09-30 | 2014-06-04 | 现代Hysco株式会社 | Preparation method of steel product having different strengths using laser heat treatment, and heat hardened steel used therein |
-
2019
- 2019-03-25 CN CN201910227010.1A patent/CN111733314A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103703152A (en) * | 2011-07-25 | 2014-04-02 | 麦格纳国际公司 | Product and process by localized heat treatment of sheet steel |
| CN103842527A (en) * | 2011-09-30 | 2014-06-04 | 现代Hysco株式会社 | Preparation method of steel product having different strengths using laser heat treatment, and heat hardened steel used therein |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114475796A (en) * | 2022-02-11 | 2022-05-13 | 湖州师范学院 | Method for improving vehicle B-pillar deformation resistance strength |
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Application publication date: 20201002 |