CN109746266B - Local cryogenic rolling preparation method for automobile U-shaped parts - Google Patents
Local cryogenic rolling preparation method for automobile U-shaped parts Download PDFInfo
- Publication number
- CN109746266B CN109746266B CN201910030394.8A CN201910030394A CN109746266B CN 109746266 B CN109746266 B CN 109746266B CN 201910030394 A CN201910030394 A CN 201910030394A CN 109746266 B CN109746266 B CN 109746266B
- Authority
- CN
- China
- Prior art keywords
- local
- automobile
- hole pattern
- shaped parts
- plate strip
- 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.)
- Active
Links
Images
Landscapes
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A local deep cooling rolling preparation method for automobile U-shaped parts is suitable for aluminum and aluminum alloys, copper and copper alloys, metal coiled materials are processed into products with required length, width and thickness to obtain metal strips, corner bending deformation areas of the metal strips are marked, marked parts are subjected to local deep cooling treatment by adopting cooling nitrogen, the cooling temperature is-190 ℃ to-50 ℃, a continuous rolling unit with a hole pattern is started, high-frequency ultrasonic vibration is adopted on a lower hole pattern roller, and workpieces subjected to local deep cooling treatment pass through an ultrasonic-assisted continuous rolling unit with a hole pattern to prepare U-shaped parts without springback and corner crack defects.
Description
Technical Field
The invention belongs to the technical field of metal material rolling, and particularly relates to a local deep cooling rolling preparation method for an automobile U-shaped part.
Background
The U-shaped parts are used in the preparation process of many important automobiles, aerospace and the like. At present, the U-shaped parts manufactured by adopting plate strips mainly have the following problems: first, internal cracks and surface crack defects occur in some materials during bending due to poor malleability. Secondly, elastic recovery easily occurs due to elastic deformation of the plate strip in the bending process. Therefore, researchers and engineers have been thinking about how to effectively reduce the defects of U-shaped components and improve the manufacturing efficiency of U-shaped components.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for preparing an automobile U-shaped part by local deep cooling rolling, which can effectively improve the quality of the U-shaped part and reduce the rebound behavior of the U-shaped part.
In order to achieve the purpose, the invention adopts the technical scheme that:
a local deep cooling rolling preparation method for an automobile U-shaped part comprises the following steps:
the first step is as follows: processing the metal coiled material into the length, width and thickness required by the product to obtain a metal plate strip;
the second step is that: marking a corner bending deformation area of the metal plate strip;
the third step: performing local cryogenic treatment on the marked part by adopting cooling nitrogen at the temperature of-190 to-50 ℃;
the fourth step: opening a continuous rolling mill group with a hole pattern;
the fifth step: adopting high-frequency ultrasonic vibration on the lower hole type roller;
and a sixth step: and (3) making the workpiece subjected to local cryogenic treatment pass through an ultrasonic-assisted continuous rolling mill group with a hole pattern to prepare the U-shaped part without springback and corner crack defects.
The thickness of the metal plate strip is 0.5 mm-3 mm.
The frequency range of the ultrasonic wave is 20 Khz-500 MHz.
The metal is aluminum, aluminum alloy, copper or copper alloy.
Compared with the prior art, the method can avoid the crack defect and the rebound behavior of the corner area of the U-shaped part in the process of preparing the U-shaped part by adopting the plate strip, and the U-shaped part prepared by the method has the potential of being applied in the fields of automobiles, aerospace and the like.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The invention relates to a local deep cooling rolling preparation method for an automobile U-shaped part, which is suitable for aluminum and aluminum alloy, copper and copper alloy. Thus, plastic forming by this mechanism can reduce the possibility of occurrence of fracture behavior during bending of the corner of the sheet material. The residual stress in the rolled piece can be eliminated by utilizing high-frequency ultrasonic vibration. Meanwhile, the high-frequency vibration can eliminate the rebound behavior of the plate strip in the plate strip forming process. Thus, according to this mechanism, the spring-back behavior of the product corners during rolling deformation of the U-shaped piece can be eliminated. Meanwhile, the mechanical property of the corner of the U-shaped piece can be effectively improved by adopting a local cryogenic treatment technology.
The specific process is shown in fig. 1, and comprises the following steps:
the first step is as follows: and processing the metal coiled material 1 with the thickness of 0.5 mm-3 mm into the length and width required by the product to obtain the metal plate strip 2.
The second step is that: and marking the corner bending deformation area 4 of the metal plate strip 2.
The third step: and performing local cryogenic treatment on the marked part by adopting cooling nitrogen at the cooling temperature of-190 to-50 ℃ to obtain a plate 3 subjected to local cryogenic treatment.
The fourth step: the hole-type roll continuous rolling mill set 5 is opened.
The fifth step: the lower hole type roller is subjected to high-frequency ultrasonic vibration by an ultrasonic wave source 6, and the ultrasonic frequency range is 20Khz to 500 MHz.
And a sixth step: and (3) making the workpiece subjected to the local cryogenic treatment pass through an ultrasonic-assisted continuous rolling unit with a hole pattern to prepare the U-shaped part 7 without springback and corner crack defects.
In one embodiment of the invention, a U-shaped aluminum alloy part with the thickness of 1mm is processed by the following steps:
the first step is as follows: the aluminum alloy AA6061 coiled material is processed into a length of 300mm and a width of 200mm, and the thickness of the plate strip is 1 mm.
The second step is that: and marking the position of the plate belt 50mm away from the edge.
The third step: and (3) carrying out local cryogenic treatment on the marked part by adopting cooling nitrogen at the cooling temperature of-100 ℃.
The fourth step: and opening the continuous rolling mill set with the hole pattern.
The fifth step: and (3) performing high-frequency ultrasonic vibration on the lower-hole roller, wherein the ultrasonic frequency range is 20 Mhz.
And a sixth step: and (3) making the workpiece subjected to local cryogenic treatment pass through an ultrasonic-assisted continuous rolling mill group with a hole pattern to prepare the U-shaped part without springback and corner crack defects.
Claims (4)
1. A method for preparing an automobile U-shaped part by local deep cooling rolling is characterized by comprising the following steps:
the first step is as follows: processing the metal coiled material into the length, width and thickness required by the product to obtain a metal plate strip;
the second step is that: marking a corner bending deformation area of the metal plate strip;
the third step: performing local cryogenic treatment on the marked part by adopting cooling nitrogen at the temperature of-190 to-50 ℃;
the fourth step: opening a continuous rolling mill group with a hole pattern;
the fifth step: adopting high-frequency ultrasonic vibration on the lower hole type roller;
and a sixth step: and (3) making the workpiece subjected to local cryogenic treatment pass through an ultrasonic-assisted continuous rolling mill group with a hole pattern to prepare the U-shaped part without springback and corner crack defects.
2. The method for manufacturing the automobile U-shaped part by the local deep cooling rolling of the claim 1 is characterized in that the thickness of the metal plate strip is 0.5 mm-3 mm.
3. The method for manufacturing U-shaped parts of automobiles by local cryogenic rolling according to claim 1, wherein the ultrasonic frequency range is 20Khz to 500 MHz.
4. The method for manufacturing U-shaped parts for automobiles by local cryogenic rolling according to claim 1, wherein the metal is aluminum, aluminum alloy, copper or copper alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910030394.8A CN109746266B (en) | 2019-01-14 | 2019-01-14 | Local cryogenic rolling preparation method for automobile U-shaped parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910030394.8A CN109746266B (en) | 2019-01-14 | 2019-01-14 | Local cryogenic rolling preparation method for automobile U-shaped parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109746266A CN109746266A (en) | 2019-05-14 |
| CN109746266B true CN109746266B (en) | 2020-03-27 |
Family
ID=66404595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910030394.8A Active CN109746266B (en) | 2019-01-14 | 2019-01-14 | Local cryogenic rolling preparation method for automobile U-shaped parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109746266B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404964B (en) * | 2019-07-08 | 2020-07-31 | 中南大学 | Rolling preparation method of aluminum alloy strip with poor performance in width direction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7434439B2 (en) * | 2005-10-14 | 2008-10-14 | Air Products And Chemicals, Inc. | Cryofluid assisted forming method |
| US9783865B2 (en) * | 2014-04-18 | 2017-10-10 | GM Global Technology Operations LLC | Thermal-assisted roll forming of high strength material |
| CN108160705B (en) * | 2017-11-17 | 2019-06-11 | 山东钢铁股份有限公司 | A kind of parallel wide width wing edge channel steel and its production method |
| CN108405609B (en) * | 2018-02-26 | 2019-07-30 | 中南大学 | A kind of ultrasonic vibration auxiliary milling method producing low residual stress aluminium alloy strips |
| CN108906889B (en) * | 2018-05-08 | 2019-08-27 | 中南大学 | A kind of deep cooling asynchronous rolling method preparing high-performance CrCoNi medium entropy alloy foil |
-
2019
- 2019-01-14 CN CN201910030394.8A patent/CN109746266B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109746266A (en) | 2019-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112718864B (en) | Production method for improving deep drawing performance of titanium strip coil for nuclear power plate heat exchanger | |
| WO2019131289A1 (en) | Method for manufacturing press formed product | |
| CN109746266B (en) | Local cryogenic rolling preparation method for automobile U-shaped parts | |
| CN102172622A (en) | Production method of black steel for 510L automobile frame | |
| CN114054586A (en) | Punch forming process for large-area hyperbolic mirror surface stainless steel plate | |
| CN102921731B (en) | Warm-rolling process method of titanium alloy thin plate | |
| Zhao et al. | An analysis of micro deep drawing of ferritic stainless steel 430 using crystal plasticity finite element method | |
| CN111876700B (en) | Heat treatment process of powder metallurgy aluminum alloy cold-rolled sheet | |
| CN109226425B (en) | Part single-point forming method for local deep cooling of aluminum alloy plate strip | |
| RU2445399C1 (en) | Manufacturing method of flat hafnium profile | |
| CN111549306B (en) | Preparation method of ultrahigh-strength titanium alloy hot-rolled bar | |
| CN113817997A (en) | High-purity alloy aluminum target material and preparation method thereof | |
| CN115026139A (en) | Method for preparing nickel-magnesium composite board by rolling | |
| RU2583567C1 (en) | METHOD FOR PRODUCING HIGHLY THIN SHEET OF TITANIUM ALLOY Ti-6,5Al-2,5Sn-4Zr-1Nb-0,7Mo-0,15Si | |
| JPH07223034A (en) | Production of titanium alloy ring | |
| CN103388116B (en) | Method for effectively rolling Mg-Al-Zn magnesium alloys | |
| CN109158421B (en) | Rolling method for preventing transverse variable-thickness plate strip from generating defects | |
| JP2019111567A (en) | Manufacturing method of press forming article | |
| TWI606120B (en) | Method of treating surface of austenitic alloy steel | |
| CN109182859B (en) | Method for preparing high-formability magnesium alloy plate through composite deformation | |
| CN110404964B (en) | Rolling preparation method of aluminum alloy strip with poor performance in width direction | |
| CN113897566B (en) | Preparation method of high-purity aluminum target | |
| CN113680821B (en) | Preparation method of Incoloy alloy wide sheet | |
| CN102418055A (en) | Production method for aluminum alloy plate for pot cover type radio receiver | |
| CN113275381A (en) | Hot rolling and rolling compounding method for preparing metal composite plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |