CN111702359A - Manufacturing method of lightweight aluminum alloy battery bracket of new energy automobile - Google Patents
Manufacturing method of lightweight aluminum alloy battery bracket of new energy automobile Download PDFInfo
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- CN111702359A CN111702359A CN202010377938.0A CN202010377938A CN111702359A CN 111702359 A CN111702359 A CN 111702359A CN 202010377938 A CN202010377938 A CN 202010377938A CN 111702359 A CN111702359 A CN 111702359A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
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Abstract
The invention provides a manufacturing method of a light aluminum alloy battery bracket of a new energy automobile, which comprises a keel assembly welding process and an assembly welding process, and specifically comprises the following steps: preparing before welding, removing an oxidation film near a welding seam of the part and cleaning oil stains; assembling positively; spot welding and fixing, namely performing manual spot welding on the welding seam of the part which is subjected to forward assembling; performing full-length welding operation by a robot, performing upright welding, and welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; cleaning and inspecting after welding, cleaning the surface of the welding seam by brushing ash, and inspecting according to the quality requirement of the welding seam of the inner profile part. Through the analysis of the keels and the skins in two dimensions of material and size, the method avoids the deformation of the skins during welding by reasonably adjusting two procedures and welding parameters of the front and back mounting, obviously improves the strength of welding seams, improves the product quality and reduces the repair rate.
Description
Technical Field
The invention relates to the technical field of automobile part production processes, in particular to a manufacturing method of a light aluminum alloy battery bracket of a new energy automobile.
Background
With the rapid development of the electric vehicle technology, the power battery develops to a bottleneck stage, and the endurance mileage of the vehicle is difficult to increase greatly through breakthrough technical innovation, so that many manufacturers begin to pay attention to the research direction of vehicle body light weight. In order to keep a lower gravity center of a vehicle body, the power battery is often arranged in the middle of the bottom of the vehicle, and the battery bracket is used as a structure for bearing the power battery, so that the safety of the new energy vehicle is very important. The existing battery support is generally provided with a set of keels on the inner side and the outer side of a skin respectively, the keels on the outer side are used for protecting the battery, the keels on the inner side are used for supporting the battery, along with continuous pursuit of light weight, a plurality of manufacturers start to use aluminum alloy with lighter weight under the same strength as raw materials of the battery support, but in the assembling and welding process of the keels and the assembling and welding process of an assembly, the problems of deformation of the skin, poor quality of welding seams and higher repair rate easily occur.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a manufacturing method of a light aluminum alloy battery bracket of a new energy automobile.
In order to achieve the purpose, the invention adopts the following technical scheme:
the manufacturing method of the light aluminum alloy battery bracket of the new energy automobile comprises a keel assembly welding process and an assembly welding process, and comprises the following specific steps:
step one, preparing before welding,
polishing within 30-45mm near the welding line to remove oxide films on the surfaces of the keel sectional material and the skin, and cleaning oil stains on the surfaces of the keel sectional material and the skin by using acetone or ethanol;
step two, assembling the front part and the back part,
the two parts to be welded are installed positively, and are pressed and fixed at corresponding positions by using special tools;
step three, spot welding and fixing are carried out,
manually spot-welding the welding seams of the parts which are subjected to the normal assembly and pairing, wherein the current of the normal assembly and spot welding is 200-220A, the welding speed is 18-22mm/s, and the welding mode is PA flat position welding; the reverse spot welding current is 180-220A, the welding speed is 18-24mm/s, and the welding mode is PE overhead position welding;
step four, the full welding operation of the robot,
the method comprises the following steps of (1) upright welding, namely welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; welding parameters during the forward and backward welding in the stage are the same;
step five, cleaning and checking after welding,
and (5) performing ash wiping and cleaning on the surface of the welding seam, and checking according to the quality requirement of the welding seam of the inner profile part.
Further, during the keel assembling and welding procedure in the third step, the forward and reverse spot welding currents are 200-220A, and the welding speed is 18-20 mm/s; during the assembly welding process, the forward spot welding current is 200-210A, the welding speed is 20-22mm/s, the reverse spot welding current is 180-200A, and the welding speed is 20-24 mm/s.
Furthermore, during the keel assembling and welding procedure in the third step, welding points are arranged to be one welding point for each welding line; during the assembly welding process, the interval of welding points is 800-1500 mm.
Further, in the fourth step, the welding parameters of the double-wire linkage welding are that the front wire: the current is 235-255A, the voltage is 24.0V, and the speed is 85-95 cm/min; rear silks: the current is 200-225A, the voltage is 23.8V, and the speed is 85-95 cm/min.
Further, the skin is manufactured by adopting a hot stamping and quenching integrated forming process.
Furthermore, in the hot stamping and quenching integrated forming process, the stamping speed is more than 400mm/s, the dwell time is 10-20s, and the unit pressure is 1.2-1.5 Mpa.
The invention has the beneficial effects that: through the analysis of the keels and the skins in two dimensions of material and size, the method avoids the deformation of the skins during welding by reasonably adjusting two procedures and welding parameters of the front and back mounting, obviously improves the strength of welding seams, improves the product quality and reduces the repair rate.
Detailed Description
The invention is further illustrated by the following examples:
example one
The manufacturing method of the light aluminum alloy battery bracket of the new energy automobile comprises a keel assembly welding process and an assembly welding process, and comprises the following specific steps:
step one, preparing before welding,
polishing within 30mm near the welding line to remove oxide films on the surfaces of the keel sectional material and the skin, and cleaning oil stains on the surfaces of the keel sectional material and the skin by using acetone or ethanol;
step two, assembling the front part and the back part,
the two parts to be welded are installed positively, and are pressed and fixed at corresponding positions by using special tools;
step three, spot welding and fixing are carried out,
manually spot-welding the welding seams of the parts which are subjected to the normal assembly and pairing, wherein the current of the normal assembly and spot welding is 200-220A, the welding speed is 18-22mm/s, and the welding mode is PA flat position welding; the reverse spot welding current is 180-220A, the welding speed is 18-24mm/s, and the welding mode is PE overhead position welding;
step four, the full welding operation of the robot,
the method comprises the following steps of (1) upright welding, namely welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; welding parameters during the forward and backward welding in the stage are the same;
step five, cleaning and checking after welding,
and (5) performing ash wiping and cleaning on the surface of the welding seam, and checking according to the quality requirement of the welding seam of the inner profile part.
Further, during the keel assembling and welding procedure in the third step, the forward and backward spot welding currents are 200A, and the welding speed is 18 mm/s; during the assembly welding process, the current of the forward spot welding is 200A, the welding speed is 20mm/s, the current of the reverse spot welding is 180A, and the welding speed is 20 mm/s.
Furthermore, during the keel assembling and welding procedure in the third step, welding points are arranged to be one welding point for each welding line; during the assembly welding process, the interval of welding points is 800 mm.
Further, in the fourth step, the welding parameters of the double-wire linkage welding are that the front wire: the current is 235A, the voltage is 24.0V, and the speed is 85 cm/min; rear silks: the current was 200-225A, the voltage was 23.8V, and the speed was 85 cm/min.
Further, the skin is manufactured by adopting a hot stamping and quenching integrated forming process.
Furthermore, in the hot stamping and quenching integrated forming process, the stamping speed is more than 400mm/s, the dwell time is 10s, and the unit pressure is 1.2 Mpa.
Through the analysis of the keels and the skins in two dimensions of material and size, the method avoids the deformation of the skins during welding by reasonably adjusting two procedures and welding parameters of the front and back mounting, obviously improves the strength of welding seams, improves the product quality and reduces the repair rate.
Example two
The manufacturing method of the light aluminum alloy battery bracket of the new energy automobile comprises a keel assembly welding process and an assembly welding process, and comprises the following specific steps:
step one, preparing before welding,
polishing within 45mm near the welding line to remove oxide films on the surfaces of the keel sectional material and the skin, and cleaning oil stains on the surfaces of the keel sectional material and the skin by using acetone or ethanol;
step two, assembling the front part and the back part,
the two parts to be welded are installed positively, and are pressed and fixed at corresponding positions by using special tools;
step three, spot welding and fixing are carried out,
manually spot-welding the welding seams of the parts which are subjected to the normal assembly and pairing, wherein the current of the normal assembly and spot welding is 200-220A, the welding speed is 18-22mm/s, and the welding mode is PA flat position welding; the reverse spot welding current is 180-220A, the welding speed is 18-24mm/s, and the welding mode is PE overhead position welding;
step four, the full welding operation of the robot,
the method comprises the following steps of (1) upright welding, namely welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; welding parameters during the forward and backward welding in the stage are the same;
step five, cleaning and checking after welding,
and (5) performing ash wiping and cleaning on the surface of the welding seam, and checking according to the quality requirement of the welding seam of the inner profile part.
Further, during the keel assembling and welding procedure in the third step, the forward and backward spot welding currents are 220A, and the welding speed is 20 mm/s; in the assembly welding process, the current of the forward spot welding is 210A, the welding speed is 22mm/s, the current of the reverse spot welding is 200A, and the welding speed is 24 mm/s.
Furthermore, during the keel assembling and welding procedure in the third step, welding points are arranged to be one welding point for each welding line; during the assembly welding process, the welding point interval is 1500 mm.
Further, in the fourth step, the welding parameters of the double-wire linkage welding are that the front wire: the current is 255A, the voltage is 24.0V, and the speed is 95 cm/min; rear silks: the current was 225A, the voltage was 23.8V, and the speed was 95 cm/min.
Further, the skin is manufactured by adopting a hot stamping and quenching integrated forming process.
Furthermore, in the hot stamping and quenching integrated forming process, the stamping speed is more than 400mm/s, the dwell time is 20s, and the unit pressure is 1.5 Mpa.
Through the analysis of the keels and the skins in two dimensions of material and size, the method avoids the deformation of the skins during welding by reasonably adjusting two procedures and welding parameters of the front and back mounting, obviously improves the strength of welding seams, improves the product quality and reduces the repair rate.
EXAMPLE III
The manufacturing method of the light aluminum alloy battery bracket of the new energy automobile comprises a keel assembly welding process and an assembly welding process, and comprises the following specific steps:
step one, preparing before welding,
polishing within 35mm near the welding line to remove oxide films on the surfaces of the keel sectional material and the skin, and cleaning oil stains on the surfaces of the keel sectional material and the skin by using acetone or ethanol;
step two, assembling the front part and the back part,
the two parts to be welded are installed positively, and are pressed and fixed at corresponding positions by using special tools;
step three, spot welding and fixing are carried out,
manually spot-welding the welding seams of the parts which are subjected to the normal assembly and pairing, wherein the current of the normal assembly and spot welding is 200-220A, the welding speed is 18-22mm/s, and the welding mode is PA flat position welding; the reverse spot welding current is 180-220A, the welding speed is 18-24mm/s, and the welding mode is PE overhead position welding;
step four, the full welding operation of the robot,
the method comprises the following steps of (1) upright welding, namely welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; welding parameters during the forward and backward welding in the stage are the same;
step five, cleaning and checking after welding,
and (5) performing ash wiping and cleaning on the surface of the welding seam, and checking according to the quality requirement of the welding seam of the inner profile part.
Further, during the keel assembling and welding procedure in the third step, the forward and backward spot welding currents are 210A, and the welding speed is 19 mm/s; in the assembly welding process, the current of the forward spot welding is 205A, the welding speed is 21mm/s, the current of the reverse spot welding is 190A, and the welding speed is 22 mm/s.
Furthermore, during the keel assembling and welding procedure in the third step, welding points are arranged to be one welding point for each welding line; during the assembly welding process, the welding point interval is 900 mm.
Further, in the fourth step, the welding parameters of the double-wire linkage welding are that the front wire: the current is 245A, the voltage is 24.0V, and the speed is 88 cm/min; rear silks: the current was 215A, the voltage was 23.8V, and the speed was 86 cm/min.
Further, the skin is manufactured by adopting a hot stamping and quenching integrated forming process.
Furthermore, in the hot stamping and quenching integrated forming process, the stamping speed is more than 400mm/s, the dwell time is 15s, and the unit pressure is 1.3 Mpa.
Through the analysis of the keels and the skins in two dimensions of material and size, the method avoids the deformation of the skins during welding by reasonably adjusting two procedures and welding parameters of the front and back mounting, obviously improves the strength of welding seams, improves the product quality and reduces the repair rate.
The present invention has been described in connection with the specific embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the protection scope of the present invention as long as various modifications are made by using the method concept and technical solution of the present invention, or the present invention is directly applied to other occasions without modification.
Claims (6)
1. The manufacturing method of the light aluminum alloy battery bracket of the new energy automobile comprises a keel assembly welding process and an assembly welding process, and is characterized by comprising the following specific steps of:
step one, preparing before welding,
polishing within 30-45mm near the welding line to remove oxide films on the surfaces of the keel sectional material and the skin, and cleaning oil stains on the surfaces of the keel sectional material and the skin by using acetone or ethanol;
step two, assembling the front part and the back part,
the two parts to be welded are installed positively, and are pressed and fixed at corresponding positions by using special tools;
step three, spot welding and fixing are carried out,
manually spot-welding the welding seams of the parts which are subjected to the normal assembly and pairing, wherein the current of the normal assembly and spot welding is 200-220A, the welding speed is 18-22mm/s, and the welding mode is PA flat position welding; the reverse spot welding current is 180-220A, the welding speed is 18-24mm/s, and the welding mode is PE overhead position welding;
step four, the full welding operation of the robot,
the method comprises the following steps of (1) upright welding, namely welding a convex welding seam by adopting laser tracking and double-wire linkage; reversely welding, namely welding a concave welding seam by adopting laser tracking and double-wire linkage; pressing the vicinity of the concave welding line by using a weight; welding parameters during the forward and backward welding in the stage are the same;
step five, cleaning and checking after welding,
and (5) performing ash wiping and cleaning on the surface of the welding seam, and checking according to the quality requirement of the welding seam of the inner profile part.
2. The manufacturing method of the new energy automobile lightweight aluminum alloy battery bracket as claimed in claim 1, wherein during the keel assembly welding procedure in the third step, the forward and reverse spot welding currents are 200-220A, and the welding speeds are 18-20 mm/s; during the assembly welding process, the forward spot welding current is 200-210A, the welding speed is 20-22mm/s, the reverse spot welding current is 180-200A, and the welding speed is 20-24 mm/s.
3. The manufacturing method of the new energy automobile lightweight aluminum alloy battery bracket according to claim 1, characterized in that during the assembly welding process of the keels in the third step, the welding spots are arranged to be one welding spot per welding seam; during the assembly welding process, the interval of welding points is 800-1500 mm.
4. The manufacturing method of the new energy automobile lightweight aluminum alloy battery bracket according to claim 1, wherein welding parameters of the twin-wire linkage welding in the fourth step are that the front wire: the current is 235-255A, the voltage is 24.0V, and the speed is 85-95 cm/min; rear silks: the current is 200-225A, the voltage is 23.8V, and the speed is 85-95 cm/min.
5. The manufacturing method of the new energy automobile lightweight aluminum alloy battery bracket as claimed in claim 1, wherein the skin is manufactured by a hot stamping and quenching integrated forming process.
6. The manufacturing method of the new energy automobile lightweight aluminum alloy battery bracket according to claim 5, characterized in that the stamping speed in the hot stamping and quenching integrated forming process is greater than 400mm/s, the dwell time is 10-20s, and the unit pressure is 1.2-1.5 MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338524A (en) * | 2022-08-31 | 2022-11-15 | 湖北三江航天万峰科技发展有限公司 | Resistance spot welding process method for thin-wall aluminum alloy box body |
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| JP2001198686A (en) * | 2000-01-14 | 2001-07-24 | Iwata Denko Kk | Case made of aluminum alloy and method of manufacturing the same |
| JP2005042175A (en) * | 2003-07-24 | 2005-02-17 | Kobe Steel Ltd | Aluminum welded structure |
| CN105458503A (en) * | 2015-12-11 | 2016-04-06 | 中国电子科技集团公司第四十八研究所 | Laser seal welding technology of composite aluminum alloy shell |
| CN106271145A (en) * | 2016-08-31 | 2017-01-04 | 辽宁忠旺铝合金精深加工有限公司 | Subway aluminium alloy car roof side-beam welding procedure |
| CN108206255A (en) * | 2018-02-06 | 2018-06-26 | 江苏银河电子股份有限公司 | Lightweight battery case keel structure and with its battery case, electric vehicle |
| CN110305719A (en) * | 2019-06-20 | 2019-10-08 | 湖北永喆热冲压零部件有限公司 | Drop stamping is with lubricator and the quenching integrated technique of high-strength aluminum alloy drop stamping |
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2020
- 2020-05-07 CN CN202010377938.0A patent/CN111702359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001198686A (en) * | 2000-01-14 | 2001-07-24 | Iwata Denko Kk | Case made of aluminum alloy and method of manufacturing the same |
| JP2005042175A (en) * | 2003-07-24 | 2005-02-17 | Kobe Steel Ltd | Aluminum welded structure |
| CN105458503A (en) * | 2015-12-11 | 2016-04-06 | 中国电子科技集团公司第四十八研究所 | Laser seal welding technology of composite aluminum alloy shell |
| CN106271145A (en) * | 2016-08-31 | 2017-01-04 | 辽宁忠旺铝合金精深加工有限公司 | Subway aluminium alloy car roof side-beam welding procedure |
| CN108206255A (en) * | 2018-02-06 | 2018-06-26 | 江苏银河电子股份有限公司 | Lightweight battery case keel structure and with its battery case, electric vehicle |
| CN110305719A (en) * | 2019-06-20 | 2019-10-08 | 湖北永喆热冲压零部件有限公司 | Drop stamping is with lubricator and the quenching integrated technique of high-strength aluminum alloy drop stamping |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338524A (en) * | 2022-08-31 | 2022-11-15 | 湖北三江航天万峰科技发展有限公司 | Resistance spot welding process method for thin-wall aluminum alloy box body |
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Application publication date: 20200925 |