CN111151973A - Method for manufacturing automobile catalytic converter shell by coiling, welding and spinning - Google Patents
Method for manufacturing automobile catalytic converter shell by coiling, welding and spinning Download PDFInfo
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- CN111151973A CN111151973A CN201911422809.2A CN201911422809A CN111151973A CN 111151973 A CN111151973 A CN 111151973A CN 201911422809 A CN201911422809 A CN 201911422809A CN 111151973 A CN111151973 A CN 111151973A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
A rolling, welding and spinning manufacturing method of an automobile catalytic converter shell adopts a process of combining rolling, welding and spinning, and comprises the following steps: curling a metal plate into a pipe barrel with a certain size on a plate bending machine; welding the seams of the pipe barrels to form a pipe, and adopting pure argon as laser shielding gas; and respectively necking and spinning two ends of the pipe by using a spinning device to form a front end cone and a rear end cone. The manufacturing process of the automobile catalytic converter shell directly takes the metal plate as the raw material, and reduces the production cost compared with the process of directly purchasing a seamless pipe; the laser is adopted for welding, so that the welding speed is high, the quality of a welding seam is good, and the production efficiency and the product quality are improved; the problems of low production efficiency and complex processing technology in the related technology are solved, the product quality is improved, the production cost is reduced, and the processing technology is simple and has high automation degree.
Description
Technical Field
The invention belongs to the technical field of material forming, and particularly relates to a method for manufacturing a shell of an automobile catalytic converter by coiling, welding and spinning.
Background
With the rapid growth of automobile keeping quantity in China, the automobile industry becomes an important strategic and pillar industry of national economy, and the scale of the automobile market in China ranks the first worldwide. The automobile part industry is an important component of automobile economy, the sales income of the automobile part industry accounts for more than 40% of the sales income of the whole automobile, and the automobile part industry is an important basis for the development of the automobile industry. In the development process of high performance and light weight of automobiles, in order to meet the requirements of automobile exhaust emission standards, the ferritic stainless steel with high temperature resistance, corrosion resistance, high thermal conductivity and low thermal expansion performance is widely applied to automobile exhaust systems. Strict environmental standards and excellent quality pursuits require the automobile exhaust system industry to accelerate innovative developments. Catalytic converters are important devices for purifying exhaust gases in automobile exhaust systems, and the quality of the catalytic converters directly affects the overall quality of the automobile exhaust systems.
Conventional automobile catalytic converter housings are mainly of the clamshell type and the welded type. The processing technology of the clamshell type catalytic converter shell is characterized in that an upper part and a lower part of a clamshell are manufactured in a die stamping forming mode, and then the edges of the two parts are welded and processed to form the clamshell type catalytic converter shell; the processing technology is complex, the efficiency is low, and the quality of the produced catalytic converter product is not high.
The welding type shell adopts a processing technology combining plate stamping and electric arc welding, a seamless steel pipe is bought firstly, a reducing pipe which is consistent with the seamless steel pipe is stamped by the plate stamping technology, and then the seamless steel pipe and the reducing pipe are welded in an electric arc welding mode, so that the production efficiency is low, and the production cost is high.
The traditional machining process of the three-way catalytic converter shell has the defects of low production efficiency, complex machining process, low automation degree, high production cost and the like. Therefore, how to improve the manufacturing method of the automobile catalytic converter shell, improve the processing quality of the automobile catalytic converter shell, increase the production efficiency of the product, and reduce the production process complexity to improve the production automation rate and further reduce the production cost of the automobile catalytic converter shell becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a manufacturing method of an automobile catalytic converter shell aiming at the technical problems, and solves the problems of high production cost, low production efficiency, complex processing technology and low automation degree in the processing process of the automobile catalytic converter shell.
In order to solve the above technical problems, according to one aspect of the present invention, there is provided a roll, weld, spin manufacturing method of an automotive catalytic converter housing, comprising the steps of:
step one, curling a metal plate into a pipe barrel with a certain size on a plate bending machine;
welding the seams of the pipe barrels to form a pipe;
and step three, respectively necking and spinning two ends of the pipe by using a spinning device to form a front end cone and a rear end cone.
Preferably, the metal plate is a ferritic stainless steel plate 1mm to 2mm thick.
Preferably, the seam welding of the tube to form the tubing comprises:
and on a plate bending machine, welding the seams of the pipe barrels by laser welding to form the pipe.
Preferably, the laser used for laser welding is Nd: YAG laser, adopting pure argon as laser protection gas.
Preferably, the laser used for laser welding is a CO2 laser, and pure argon gas is used as laser shielding gas.
Preferably, the flow rate of the pure argon is 20-25L/min.
Preferably, the laser power of the laser is 1.6kW, the defocusing amount is 0mm, and the welding speed is 1.5 m/min.
Preferably, the forming of the front and rear end cones by respectively necking and spinning the two ends of the pipe by using a spinning device comprises:
preferably, the spinning device is used for respectively necking and spinning two ends of the pipe to form a front end cone and a rear end cone.
Preferably, the spinning feed rate is 3500 revolutions/min.
Preferably, at cold spinning, the spinning feed rate is 3300 revolutions/min.
The technical scheme of the invention has the beneficial effects that:
1. the rolling, welding and spinning manufacturing method of the automobile catalytic converter shell directly takes the metal plate as the raw material, and reduces the production cost compared with the method of directly purchasing a seamless pipe;
2. the ferrite stainless steel plate with the thickness of 1mm-2mm is coiled into a pipe barrel with a certain size on a plate coiling machine, so that the high-temperature oxidation and corrosion resistance can be realized, and the characteristics of weight reduction and long service life are realized;
3. the flow of pure argon is 20-25L/min, so that the welding line can be effectively protected from being oxidized, and a beautiful and high-quality welding joint is obtained;
4. the laser power of the laser is 1.6kW, so that 2mm ferrite stainless steel can be ensured to be completely welded; the defocusing amount is 0mm, the laser energy at the position is most concentrated, and the welding seam is narrow and the fusion depth is large; the welding speed is 1.5m/min, the welding device can be well matched with other welding parameters, excellent welding quality and comprehensive mechanical property of a joint are obtained, and compared with electric arc welding, the efficiency is improved by 5-8 times; the processing quality of the automobile catalytic converter shell is improved, and meanwhile, the production efficiency of the product is greatly improved.
5. The process combining pipe coiling, welding and spinning is adopted, so that the automation degree is high, the machining process is simple, and the production efficiency is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention. The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
FIG. 1 is a first schematic diagram according to the related art of the present invention;
FIG. 2 is a second schematic diagram according to the related art of the present invention;
fig. 3 is a schematic diagram according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A method of manufacturing an automobile catalytic converter case by winding, welding, and spinning according to the present embodiment includes:
s1, coiling the ferritic stainless steel plate with the thickness of 1mm-2mm into a pipe barrel with a certain size on a plate coiling machine. The pipe fittings in the automobile pipeline system are not used as bearing parts and are mainly used for ventilating and communicating oil, and the automobile exhaust pipeline system (comprising a catalytic converter shell) is usually made of thin ferrite stainless steel which is resistant to high-temperature oxidation and high-temperature corrosion, and has the characteristics of weight reduction and long service life.
And S2, welding the seams of the pipe barrel on a plate bending machine by laser welding to form the pipe. The laser welding uses Nd: YAG laser, or CO2 laser, and the like used for macroscopic processing, and pure argon is used as laser shielding gas, the flow of the pure argon is 20-25L/min, the welding seam can be effectively protected from being oxidized, and the attractive and high-quality welding joint is obtained. The laser power is 1.6kW, and 2mm ferrite stainless steel can be completely welded. The defocusing amount is 0mm, the laser energy at the position is most concentrated, and the welding seam is narrow and the fusion depth is large. The welding speed is 1.5m/min, the welding speed is well matched with other welding parameters, excellent welding quality and comprehensive mechanical property of a joint can be obtained, and compared with electric arc welding, the efficiency is improved by 5-8 times.
And S3, respectively necking and spinning the two ends of the pipe by using a double-spinning-wheel spinning machine tool at normal temperature to form front and rear end cones. The spinning feed rate is 3500 r/min, which is the optimized optimal parameter, less than 3500 r/min, the spinning forming efficiency is low, and higher than 3500 r/min, the spinning cracking phenomenon is easy to occur, and the fraction defective is increased. In cold spinning, the spinning feed rate is 3300 revolutions/min. The spinning forming machine can ensure that the spinning forming efficiency is high and the spinning cracking phenomenon is not easy to occur when in cold spinning, and reduces the reject ratio of products.
Example (b):
a4-series ferritic stainless steel plate with the thickness of 2mm and the length of 220mm is curled into a pipe barrel with the inner diameter of 126mm on a plate rolling machine, and the gap of a butt joint is ensured to be less than 0.5 mm. On a plate bending machine, a laser welding head is opposite to a butt joint of a pipe barrel, the flow of pure argon is set to be 25L/min, the laser power is 1.6kW, the defocusing amount is 0mm, the welding speed is 1.5m/min, and the butt joint of the pipe barrel is welded. And after the welding is finished, taking down the welded pipe and clamping the pipe on a spinning machine tool. And spinning one end of the pipe by adopting a spinning feed rate of 3500 revolutions/min, turning and clamping the pipe after spinning forming, and spinning one end of the pipe by adopting the parameters. An automotive catalytic converter housing as shown in fig. 3 was obtained.
By adopting the rolling, welding and spinning manufacturing method of the automobile catalytic converter shell, a product which is integrally formed, light in weight, small in size, smooth in welding line and excellent in mechanical property can be obtained, as shown in figure 3. Compared with fig. 1 and fig. 2, the improved method for manufacturing the automobile catalytic converter shell has the following obvious advantages compared with the traditional manufacturing method due to the combined process of pipe coiling, welding and spinning:
1. the weight is reduced, the space is saved (in the traditional manufacturing method, the extra height of an arc welding seam is about 3mm, the product has heavy weight and occupies large space), and the light weight development requirement of the industry is met;
2. the manufacturing cost is obviously reduced, the stamping and welding links in the traditional manufacturing method are omitted, and the cost of a die or the cost of purchasing a seamless steel tube and the like is saved;
3. the product is quick to modify, and has strong market adaptability;
therefore, the manufacturing method of the automobile catalytic converter shell improves the production efficiency and has high automation degree.
So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the drawings, but it should be understood by those skilled in the art that the above embodiments are only for clearly illustrating the present invention, and not for limiting the scope of the present invention, and it is apparent that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A rolling, welding and spinning manufacturing method of an automobile catalytic converter shell is characterized in that a process combining pipe rolling, welding and spinning is adopted, and the method comprises the following steps:
step one, curling a metal plate into a pipe barrel with a certain size on a plate bending machine;
welding the seams of the pipe barrels to form a pipe;
and step three, respectively necking and spinning two ends of the pipe by using a spinning device to form a front end cone and a rear end cone.
2. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 1,
the metal plate is a ferrite stainless steel plate with the thickness of 1mm-2 mm.
3. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 1 or 2,
welding the seam of the tube to form a tubing comprising:
and on a plate bending machine, welding the seams of the pipe barrels by laser welding to form the pipe.
4. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 3,
YAG laser, and pure argon as laser shielding gas.
5. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 3,
the laser used for laser welding is a CO2 laser, and pure argon is used as laser shielding gas.
6. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 4 or 5,
the flow rate of the pure argon is 20-25L/min.
7. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 4 or 5,
the laser power of the laser is 1.6kW, the defocusing amount is 0mm, and the welding speed is 1.5 m/min.
8. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to any one of claims 1 to 7,
utilizing the spinning device, right tubular product both ends carry out necking down spinning respectively, and the end awl includes before forming:
and (3) respectively necking and spinning two ends of the pipe by using a spinning device at normal temperature to form a front end cone and a rear end cone.
9. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 8,
the spinning feed rate is 3500 rpm/min.
10. The roll, weld, spin manufacturing method of an automobile catalytic converter housing according to claim 1,
in cold spinning, the spinning feed rate is 3300 revolutions/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422809.2A CN111151973A (en) | 2019-12-31 | 2019-12-31 | Method for manufacturing automobile catalytic converter shell by coiling, welding and spinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422809.2A CN111151973A (en) | 2019-12-31 | 2019-12-31 | Method for manufacturing automobile catalytic converter shell by coiling, welding and spinning |
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| CN111151973A true CN111151973A (en) | 2020-05-15 |
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| CN201911422809.2A Pending CN111151973A (en) | 2019-12-31 | 2019-12-31 | Method for manufacturing automobile catalytic converter shell by coiling, welding and spinning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404894A (en) * | 2020-10-26 | 2021-02-26 | 无锡英特派金属制品有限公司 | Preparation method of large length-diameter ratio, small-caliber and ultrathin platinum and platinum-rhodium alloy crucible |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685135A (en) * | 2002-09-30 | 2005-10-19 | 富尔西亚排气系统公司 | Exhaust line catalyst or muffler shell for motor vehicle and method of producing one such shell |
| CN101250672A (en) * | 2006-12-07 | 2008-08-27 | 日新制钢株式会社 | Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe |
| CN102350618A (en) * | 2011-09-21 | 2012-02-15 | 芜湖杰锋汽车动力系统有限公司 | Method for processing catalytic converter for automobile |
-
2019
- 2019-12-31 CN CN201911422809.2A patent/CN111151973A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685135A (en) * | 2002-09-30 | 2005-10-19 | 富尔西亚排气系统公司 | Exhaust line catalyst or muffler shell for motor vehicle and method of producing one such shell |
| CN101250672A (en) * | 2006-12-07 | 2008-08-27 | 日新制钢株式会社 | Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe |
| CN102350618A (en) * | 2011-09-21 | 2012-02-15 | 芜湖杰锋汽车动力系统有限公司 | Method for processing catalytic converter for automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404894A (en) * | 2020-10-26 | 2021-02-26 | 无锡英特派金属制品有限公司 | Preparation method of large length-diameter ratio, small-caliber and ultrathin platinum and platinum-rhodium alloy crucible |
| CN112404894B (en) * | 2020-10-26 | 2022-03-01 | 英特派铂业股份有限公司 | Preparation method of large length-diameter ratio, small-caliber and ultrathin platinum or platinum-rhodium alloy crucible |
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Application publication date: 20200515 |