CN117960890A - Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall - Google Patents
Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall Download PDFInfo
- Publication number
- CN117960890A CN117960890A CN202410036808.9A CN202410036808A CN117960890A CN 117960890 A CN117960890 A CN 117960890A CN 202410036808 A CN202410036808 A CN 202410036808A CN 117960890 A CN117960890 A CN 117960890A
- Authority
- CN
- China
- Prior art keywords
- side wall
- column
- steel
- die
- bulging
- 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
- 238000004512 die casting Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 229910000838 Al alloy Inorganic materials 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000011328 necessary treatment Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000004075 alteration Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Body Structure For Vehicles (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a manufacturing method and a structure of a steel-aluminum mixed integrated die-casting type automobile body side wall, which utilize an internal high-pressure bulging and die-casting forming process of liquid or gas medium, can obtain a high-strength and light-weight mixed material automobile body side wall structure, can reduce the wall thickness and weight of side wall parts while realizing the improvement of processing precision, and ensures that the structural strength of side wall finished products is not influenced. The related parts are reduced by more than 80% in the side wall manufacturing process, and welding is not needed, so that potential safety hazards caused by the problem of lack of welding and missing welding can be reduced. The invention completes the assembly of the main structure of the integral forming of the related parts of the side wall and the integral forming of the side wall after the steps of bulging and die casting, so that the number of parts in the side wall is reduced, the process is simplified, the production efficiency is improved, and a large amount of labor cost is saved.
Description
Technical Field
The invention belongs to the technical field of automobile body structural parts, and particularly relates to a manufacturing method and a structure of a steel-aluminum mixed integrated die-casting automobile body side wall.
Background
At present, side walls are manufactured by mainly adopting modes of steel combined stamping, sheet metal, welding and the like in the manufacturing of vehicle body parts, the structure is single, a large number of welding spots and welding seams lead to lack of welding and missing of welding to frequently occur, the product quality and the safety are affected, and higher labor cost is also brought to a large number of parts, so that the realization of the light weight of the vehicle body is also limited. At present, the aluminum materials are adopted to manufacture the upper car body parts such as side walls and the like, so that the number of car models is small, and the structural strength indexes of the aluminum parts cannot completely meet the requirements.
Disclosure of Invention
In view of the above, the invention provides a manufacturing method of a steel-aluminum mixed integrated die-casting type vehicle body side wall, which specifically comprises the following steps:
Firstly, rolling a steel plate material, and then performing bending preforming operation to obtain steel tube blanks corresponding to all parts including an A column, a B column and a C column in a side wall respectively;
Step two, heating the steel pipe blank and then respectively placing the steel pipe blank into corresponding forming dies; one end of the steel pipe blank is plugged by a plug, liquid bulging medium or high-pressure inert gas is introduced into the other end of the steel pipe blank, and the steel pipe blank is bulged in a hydraulic bulging or hot gas bulging mode to obtain corresponding A-column pipe beams, B-column pipe beams and C-column pipe beams respectively;
Step three, placing the A column tube beam, the B column tube beam and the C column tube beam obtained through bulging in the step two into the same forming die or different forming dies for pressure maintaining; injecting liquid aluminum alloy into a die cavity in a semi-solid die casting or vacuum die casting mode, and wrapping aluminum alloy on the surfaces of the steel A-column tube beam, the steel B-column tube beam and the steel C-column tube beam to form fixed connection among all the components, so that the assembly and the integral die casting forming of the side wall of the vehicle body are completed;
and step four, cooling the side wall of the formed automobile body, and demoulding the side wall of the formed automobile body from the mould.
Further, manufacturing two steel tube blanks for the B column in the first step, and forming a side wall B column structure of embedding two mutually-spaced steel tube beams in the aluminum material after the second step and the third step; the middle lower part of the B column is also provided with an opening for installing a rear door hinge mounting plate, a safety belt and a circuit.
Further, it is characterized in that: after the side body is demolded from the mold, necessary treatments including protection welding, cutting, polishing and the like are also carried out.
Correspondingly, the invention also provides a vehicle body side wall structure manufactured by the method.
The steel-aluminum mixed integrated die-casting vehicle body side wall manufacturing method and structure provided by the invention can obtain the high-strength and light-weight mixed material vehicle body side wall structure by utilizing the bulging and die-casting forming process of liquid or gas medium, can reduce the thickness and weight of the wall of the part while improving the processing precision, and does not influence the structural strength of the finished product. Welding is not needed in the side wall manufacturing process, so that potential safety hazards caused by the problem of lack of welding and welding leakage can be reduced. The invention completes the assembly of the main structure and the integral formation of the side wall after the steps of bulging and die casting, so that the number of parts in the side wall is reduced, the process is simplified, the production efficiency is improved, and a large amount of labor cost is saved.
Drawings
FIG. 1 is a schematic flow chart of a method according to the present invention;
FIG. 2 is a schematic view of a preferred construction of a front side body panel made in accordance with the present invention;
FIG. 3 is a schematic view of a section A-A of the structure and materials at the junction of the front end of the A-pillar and the instrument beam mounting bracket;
FIG. 4 is a schematic view of a cross section B-B of the structure and materials at the AB post-roof rail attachment and roof rail;
FIG. 5 is a schematic view of a middle structure and material section C-C of a B-pillar with an opening;
FIG. 6 is a schematic view of a lower structure with an opening and a material section D-D of a B-pillar;
FIG. 7 is an exploded view of an internal tubular beam and die cast aluminum alloy in a body side wall made in accordance with the present invention;
fig. 8 is a schematic view of a body side shell made in accordance with the present invention mated with another body structure.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a manufacturing method of a steel-aluminum mixed integrated die-casting type vehicle body side wall, which is shown in figure 1 and specifically comprises the following steps:
Firstly, rolling a steel plate material, and then performing bending preforming operation to obtain steel tube blanks corresponding to the positions of the side wall including the A column, the B column, the C column and the like respectively;
Step two, heating the steel pipe blank and then respectively placing the steel pipe blank into corresponding forming dies; one end of the steel pipe blank is plugged by a plug, liquid bulging medium or high-pressure inert gas is introduced into the other end of the steel pipe blank, and the steel pipe blank is bulged in a hydraulic bulging or hot gas bulging mode to obtain corresponding A-column pipe beams, B-column pipe beams and C-column pipe beams respectively; the specific selection of which bulging mode is used for manufacturing the tubular beam can be determined based on comprehensive consideration of factors such as strength requirements, production efficiency, cost and the like on different parts of the side wall;
Step three, placing the A column tube beam 2, the B column tube beams 3, 4 and the C column tube beam (not shown) obtained through bulging in the step two into the same forming die or different forming dies for pressure maintaining; injecting liquid aluminum alloy into a die cavity in a semi-solid die casting or vacuum die casting mode, and wrapping aluminum alloy on the surfaces of the steel A-column tube beam, the steel B-column tube beam and the steel C-column tube beam to form fixed connection among all the components, so that the assembly and the integral die casting forming of the side wall of the vehicle body are completed;
and step four, cooling the side wall of the formed automobile body, and demoulding the side wall of the formed automobile body from the mould.
Fig. 7 shows a decomposition structure of an inner tubular beam and a die-cast aluminum alloy in a side body of a vehicle body manufactured by performing the above method, including a tubular beam structure formed by the steps two and three for a pillar a, a tubular beam structure formed by the steps two and three for a pillar B, and a die-cast aluminum alloy structure. Fig. 8 shows an assembly mode of the automobile body side wall matched with automobile body parts such as the side wall outer plate assembly, the rear side wall assembly and the like, and the integrated die-casting front side wall structure is connected with the side wall outer plate assembly and the rear side wall assembly by adopting the FDS to form a complete side wall assembly as the side wall outer plate assembly and the rear side wall assembly belong to a steel structure.
The front part of the side wall of the car body manufactured by the method is shown in fig. 2, wherein the aluminum alloy wrapped on the front door hinge mounting plate 1 and the tubular beams 2,3 and 4 is formed in the die casting process of the step three.
In the preferred embodiment of the invention, in the first step, two steel tube blanks are manufactured for the B column, and a side wall B column structure with two mutually-spaced steel tube beams embedded in the aluminum material is formed after the second step and the third step; the upper part of the B column is connected with the A column and the vicinity of the connecting piece of the upper edge beam, so that the two tube beams are closely spaced and separated by aluminum materials; the space between the two tube beams gradually increases along with the downward extension of the B-pillar, and an opening enough for accommodating the rear door hinge mounting plate, the safety belt and the circuit can be formed at the middle lower part, and the opening can be formed in the die casting process of the third step or in the proper cutting process of the B-pillar. Fig. 3-6 show sectional views of various parts of alternative body side wall structures made in accordance with the present invention, wherein 5 is aluminum material die cast onto the tubular beam and 6-8 are tubular beams embedded in the a-pillar, AB-roof rail connector and B-pillar, respectively. The cross section of the tubular beam can be correspondingly formed in the liquid bulging or hot air bulging process according to specific structural strength requirements on different positions of the A column and the B column.
In a preferred embodiment of the invention, it is characterized in that: after the side body is demolded from the mold, necessary treatments including protection welding, cutting, polishing and the like are also carried out.
Correspondingly, the invention also provides a vehicle body side wall structure manufactured by the method.
It should be understood that, the sequence number of each step in the embodiment of the present invention does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A manufacturing method of a steel-aluminum mixed integrated die-casting type vehicle body side wall is characterized by comprising the following steps of: the method specifically comprises the following steps:
Firstly, rolling a steel plate material, and then performing bending preforming operation to obtain steel tube blanks corresponding to all parts including an A column, a B column and a C column in a side wall respectively;
Step two, heating the steel pipe blank and then respectively placing the steel pipe blank into corresponding forming dies; one end of the steel pipe blank is plugged by a plug, liquid bulging medium or high-pressure inert gas is introduced into the other end of the steel pipe blank, and the steel pipe blank is bulged in a hydraulic bulging or hot gas bulging mode to obtain corresponding A-column pipe beams, B-column pipe beams and C-column pipe beams respectively;
Step three, placing the A column tube beam, the B column tube beam and the C column tube beam obtained through bulging in the step two into the same forming die or different forming dies for pressure maintaining; injecting liquid aluminum alloy into a die cavity in a semi-solid die casting or vacuum die casting mode, and wrapping aluminum alloy on the surfaces of the steel A-column tube beam, the steel B-column tube beam and the steel C-column tube beam to form fixed connection among all the components, so that the assembly and the integral die casting forming of the side wall of the vehicle body are completed;
and step four, cooling the side wall of the formed automobile body, and demoulding the side wall of the formed automobile body from the mould.
2. The method of claim 1, wherein: manufacturing two steel tube blanks for the B column in the first step, and forming a side wall B column structure of embedding two steel tube beams which are mutually spaced in an aluminum alloy material after the second step and the third step; the middle lower part of the B column is also provided with an opening for installing a rear door hinge mounting plate, a safety belt and a circuit.
3. The method of claim 1, wherein: after the side body is demolded and taken out of the die, necessary treatments including protection welding, cutting and polishing are also carried out.
4. A steel-aluminum mixed integrated die-casting type car body side wall structure is characterized in that: manufactured by the method of any one of the preceding claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410036808.9A CN117960890A (en) | 2024-01-10 | 2024-01-10 | Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410036808.9A CN117960890A (en) | 2024-01-10 | 2024-01-10 | Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117960890A true CN117960890A (en) | 2024-05-03 |
Family
ID=90862012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410036808.9A Pending CN117960890A (en) | 2024-01-10 | 2024-01-10 | Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117960890A (en) |
-
2024
- 2024-01-10 CN CN202410036808.9A patent/CN117960890A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103237611B (en) | Method for manufacturing L-shaped product | |
| US8171769B2 (en) | Method of forming a flanged tubular member in hydroforming | |
| EP3320996B1 (en) | Method and apparatus for manufacturing press component | |
| US7337641B1 (en) | Hydroformed tubular members and method of hydroforming tubular members for vehicles | |
| US20060108783A1 (en) | Structural assembly for vehicles and method of making same | |
| CN104959442A (en) | Production method of highly dimensionally accurate half shells | |
| KR101585439B1 (en) | Manufacturing method of tail-gate innerpanel for vehicle | |
| CN105188982A (en) | Blank, molded plate, method of manufacturing press-molded product and press-molded product | |
| US20050161981A1 (en) | Vehicle floor having a unitary inner panel and outer panel | |
| US7322640B2 (en) | Hydroformed and roll-formed cross sill assembly for vehicles and method of making same | |
| CN102947021A (en) | Method for producing hollow profiles having a longitudinal flange | |
| US10960927B2 (en) | Longitudinal beam and method for the production thereof | |
| KR101992580B1 (en) | Molds and Manufacturing method for molding car doors and other products at the same time | |
| CN201494000U (en) | Die for fabricating shell of vehicle body | |
| CN104512472A (en) | B column on vehicle and manufacturing method | |
| CN117960890A (en) | Manufacturing method and structure of steel-aluminum mixed integrated die-casting type vehicle body side wall | |
| KR100599002B1 (en) | Manufacture method of front side member use of hydroforming | |
| US6155634A (en) | Body frame component for a motor vehicle and method of producing it | |
| CN107931401A (en) | The molding machine and method of a kind of bodywork parts | |
| CN207547361U (en) | A kind of molding machine of bodywork parts | |
| CN113579046A (en) | Method for molding drawing technical surface of outer plate of front side wall of automobile | |
| KR100501579B1 (en) | Method for improving strength of hydroforming products | |
| CN118023414A (en) | Manufacturing method and structure of upper car body framework integrally formed through hot gas expansion and die casting | |
| CN108526285A (en) | A kind of internal high pressure forming devices and methods therefor of long branch pipe Y-pipe hollow unit | |
| CN219948355U (en) | Steel-aluminum-magnesium-plastic mixed structure instrument beam bracket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |