CN113927247A - Heat insulation partition plate of automobile exhaust pipe and preparation method thereof - Google Patents
Heat insulation partition plate of automobile exhaust pipe and preparation method thereof Download PDFInfo
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- CN113927247A CN113927247A CN202111003621.1A CN202111003621A CN113927247A CN 113927247 A CN113927247 A CN 113927247A CN 202111003621 A CN202111003621 A CN 202111003621A CN 113927247 A CN113927247 A CN 113927247A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
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Abstract
The invention relates to a method for preparing a heat insulation partition plate of an automobile exhaust pipe, which comprises the following steps of S1, adding raw materials into a casting machine according to the raw material proportion, and starting the casting machine by a central control unit to prepare an aluminum plate; step S2, the central control unit starts a conveyer to convey the aluminum plate in the step S1 to a hot rolling mill for hot rolling; step S3, the central control unit conveys the aluminum plate subjected to the hot rolling in the step S2 to a cold rolling mill for cold rolling; step S4, embossing the cold-rolled aluminum plate; and step S4, performing surface corrosion resistance treatment on the embossed aluminum plate, and monitoring the process of processing the heat insulation partition plate in real time through the central control unit, so that the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a heat insulation partition plate of an automobile exhaust pipe and a preparation method thereof.
Background
The automobile exhaust pipe heat insulation partition plate is used for insulating heat of an automobile exhaust pipe and an automobile floor, and is easily damaged due to the fact that the automobile exhaust pipe heat insulation partition plate is often in the environment of high temperature and corrosive gas, but in the prior art, the extrusion pressure of a cold rolling mill and a hot rolling mill is controlled insufficiently when the automobile exhaust pipe heat insulation partition plate is prepared, and the prepared automobile exhaust pipe heat insulation partition plate is uneven in thickness and poor in quality.
Disclosure of Invention
Therefore, the invention provides a preparation method of a heat-insulating partition plate of an automobile exhaust pipe, which is used for overcoming the problems that the extrusion pressure of a cold rolling mill and a hot rolling mill is controlled insufficiently when the heat-insulating partition plate of the automobile exhaust pipe is prepared in the prior art, and the prepared heat-insulating partition plate of the automobile exhaust pipe is uneven in thickness and poor in quality.
In order to achieve the above objects, the present invention provides a method for manufacturing a heat insulating partition panel for an automobile exhaust pipe, comprising,
step S1, adding the raw materials into a casting machine according to the raw material proportion, and starting the casting machine by a central control unit to prepare an aluminum plate;
step S2, the central control unit starts a conveyer to convey the aluminum plate in the step S1 to a hot rolling mill for hot rolling;
step S3, the central control unit conveys the aluminum plate subjected to the hot rolling in the step S2 to a cold rolling mill for cold rolling;
step S4, embossing the cold-rolled aluminum plate;
step S4, carrying out surface corrosion resistance treatment on the embossed aluminum plate;
in the step S2, the central control unit obtains the thickness W of the fused and cast aluminum plate through the first detection device, compares the thickness W of the fused and cast aluminum plate with the thickness of a preset fused and cast aluminum plate, and selects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit obtains the thickness W 'of the hot-rolled aluminum plate through a second detection device, compares the thickness W' of the hot-rolled aluminum plate with the preset thickness W0 of the hot-rolled aluminum plate, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit compares the corrected extrusion distance Dai' of the hot rolling mill with the minimum value Damin of the extrusion distance of the hot rolling mill, and judges whether to correct the extrusion speed of the hot rolling mill according to a comparison result; after the hot rolling is finished, the central control unit compares the hot rolling times K of the aluminum plate with preset hot rolling times K0, and corrects the preset extrusion distance Db of the cold rolling mill according to the comparison result;
in step S3, the central control unit obtains the cold-rolled aluminum plate thickness Wb through a third detection device, compares the cold-rolled aluminum plate thickness Wb with the standard aluminum plate embossed thickness Ws, and determines whether the extrusion distance of the cold rolling mill needs to be adjusted according to a comparison result.
Further, when the heat insulation partition plate is prepared, the central control unit compares the thickness W of the fused and cast aluminum plate obtained by the first detection device with a preset thickness of the fused and cast aluminum plate, and selects an extrusion distance Dai of the hot rolling mill according to a comparison result, wherein i is 1,2,3, 4;
the central control unit is further provided with a first fused and cast aluminum plate thickness W1, a second fused and cast aluminum plate thickness W2, a third fused and cast aluminum plate thickness W3, a squeezing distance Da1 of a first hot rolling mill, a squeezing distance Da2 of a second hot rolling mill, a squeezing distance Da3 of a third hot rolling mill and a squeezing distance Da4 of a fourth hot rolling mill;
when W < W1, the central control unit sets the pressing distance of the hot rolling mill to Da 1;
when W1 is more than W and less than or equal to W2, the central control unit sets the extrusion distance of the hot rolling mill to Da 2;
when W2 is more than W and less than or equal to W3, the central control unit sets the extrusion distance of the hot rolling mill to Da 3;
when W > W3, the central control unit sets the pressing distance of the hot rolling mill to Da 4.
Further, the central control unit is also provided with a standard hot-rolled aluminum plate thickness W0, when the heat-insulating partition plate is processed by the heat-insulating partition plate, the central control unit obtains the hot-rolled aluminum plate thickness W 'through the second detection device, compares the hot-rolled aluminum plate thickness W' with the standard hot-rolled aluminum plate thickness W0, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result;
if W' is less than or equal to W0, the central control unit judges that the thickness of the hot-rolled aluminum plate meets the standard and carries out the next step;
if W '> W0, the central control unit judges that the thickness of the hot-rolled aluminum plate does not meet the standard and corrects the extrusion distance of the hot rolling mill, the central control unit sets the corrected extrusion distance as Dai', sets Dai '═ Dai x (1- (W0-W')/W '), and after the correction is finished, the central control unit performs secondary extrusion on the hot-rolled aluminum plate until W' is less than or equal to W0.
Further, the central control unit is also provided with a minimum hot rolling mill extrusion distance Damin, and after the extrusion distance of the hot rolling mill is corrected, the central control unit compares the corrected extrusion distance Dai' of the hot rolling mill with the minimum hot rolling mill extrusion distance Damin;
if Dai ' is not less than or equal to Damin, the central control unit judges that the extrusion distance of the hot rolling mill meets the standard and adjusts the extrusion distance of the hot rolling mill to Dai ' so as to carry out secondary extrusion on the hot-rolled aluminum plate until W ' is not more than W0;
if Dai ' is less than Damin, the central control unit judges that the extrusion distance of the hot rolling mill does not meet the standard and adjusts the extrusion distance of the hot rolling mill to Damin, after the adjustment is completed, the central control unit corrects the extrusion speed of the hot rolling mill to perform secondary extrusion on the hot-rolled aluminum plate until W ' is less than or equal to W0, the central control unit sets the corrected extrusion speed of the hot rolling mill to be V, and V is set to be V0 x (1- (Dai ' -Damin)/Damin), wherein V0 is the preset extrusion speed of the hot rolling mill.
Further, the central control unit is further provided with a standard hot rolling extrusion frequency K0, when the hot rolling mill finishes one extrusion on the fused and cast aluminum plate, the central control unit records the extrusion frequency as K1, when the central control unit judges that W ' is less than or equal to W0, the central control unit corrects the preset extrusion distance Db of the cold rolling mill according to the actual extrusion frequency K of the hot rolling mill, and the central control unit sets the extrusion distance of the cold rolling mill after correction as Db ' and sets Db ' as Db x (K/K0).
Further, the central control unit is also provided with a standard aluminum plate embossed thickness Ws, and when the cold rolling mill performs cold rolling at the extrusion distance Db', the central control unit compares the actual thickness Wb of the cold-rolled aluminum plate obtained by the third detection device with the standard aluminum plate embossed thickness Ws;
when Wb is less than or equal to Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate meets the standard, and embossing the aluminum plate;
and when Wb is larger than Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate does not meet the standard, and adjusts the corrected extrusion distance Db 'of the cold rolling mill to perform secondary extrusion on the aluminum plate, and sets Db' as Db ', and Db' (1- (Wb-Ws/Wb)) until Wb is less than or equal to Ws.
Further, the central control unit is also provided with a maximum extrusion distance change value delta Dbmax of the cold rolling mill, when the central control unit adjusts the extrusion distance of the cold rolling mill to Db ″, the central control unit calculates an actual extrusion distance change value delta Db of the cold rolling mill, sets delta Db ═ Db '-Db' |, and compares the calculated extrusion distance change value delta Db with the maximum extrusion distance change value delta Dbmax of the cold rolling mill;
when the delta Db is less than or equal to the delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill meets the standard, and adjusts the extrusion distance of the cold rolling mill to Db';
when delta Db > -delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill does not meet the standard, and the central control unit adjusts the extrusion distance of the cold rolling mill to Dbmin; wherein Dbmin is the minimum extrusion distance of the cold rolling mill.
Further, when the central control unit determines that the extrusion distance change of the cold rolling mill does not meet the standard, the central control unit corrects the extrusion speed of the cold rolling mill, and the central control unit sets the corrected extrusion speed of the cold rolling mill to Vb', Vb ═ Vb x (1- Δ Db/. DELTA.Dbmax), wherein Vb is the extrusion speed of the preset cold rolling mill.
Further, the central control unit is further provided with a maximum correction number N0, when the central control unit completes one correction on the hot rolling mill or the cold rolling mill, the central control unit records the correction number as N equal to 1, when the central control unit completes j corrections on the hot rolling mill or the cold rolling mill, j equal to 1,2,3,.. once, N is set, the central control unit records the correction number as N equal to j, and when the central control unit judges that N equal to N0 and Wb > Ws, the central control unit increases the temperature of the cast aluminum plate.
Further, the heat insulation partition board of the automobile exhaust pipe comprises the following components in percentage by mass: 0.2-0.6%, Fe: 0.3-0.8%, Cu: 0.1-0.4%, Mg: 0.3-2.5%, Cr: 0.4%, Zn: 0.4%, Ti: 0.3 percent and the balance of Al.
Compared with the prior art, the method has the advantages that in the process of processing the heat-insulating partition plate, the thickness of the aluminum plate is controlled in real time by arranging the central control unit and the plurality of detection devices, the hot rolling mill and the cold rolling mill are adjusted in real time according to real-time detection results, the thickness of the prepared heat-insulating partition plate for the automobile exhaust pipe can meet the standard by monitoring the process of processing the heat-insulating partition plate in real time through the central control unit, meanwhile, the heat-radiating area of the prepared heat-insulating partition plate is larger by the preparation method, and the heat-radiating capacity of the heat-insulating partition plate is improved.
Furthermore, when the heat insulation partition plate is prepared, the central control unit obtains the thickness W of the fused and cast aluminum plate through the first detection device, compares the thickness W with the thickness of the preset fused and cast aluminum plate, selects the extrusion distance Dai of the hot rolling mill according to the comparison result, can accurately master the extrusion distance of the hot rolling mill through the judgment of the central control unit on the thickness of the fused and cast aluminum plate, can effectively control the extrusion pressure of the hot rolling mill through selecting the extrusion distance of the hot rolling mill, and further can enable the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe to meet the standard.
Furthermore, the central control unit is further provided with a standard hot-rolled aluminum plate thickness W0, when the heat insulation partition plate is machined, the thickness of the aluminum plate after hot rolling is judged, whether the thickness of the aluminum plate meets the preset standard or not is judged according to a comparison result, when the thickness of the aluminum plate after hot rolling does not meet the preset standard, the extrusion pressure is improved by correcting the extrusion distance of a hot rolling mill, and then the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard.
Furthermore, the central control unit is also provided with a minimum hot rolling mill extrusion distance Damin, the central control unit controls the extrusion distance of the hot rolling mill in real time in the process of processing the heat insulation partition plate, the extrusion distance and the extrusion speed of the hot rolling mill can be accurately mastered, and the aluminum plate can be accurately extruded by mastering the extrusion distance and the extrusion speed of the hot rolling mill, so that the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard.
Furthermore, the central control unit is also provided with standard hot rolling extrusion times K0, the extrusion force of the cold rolling mill can be accurately controlled by correcting the extrusion distance of the cold rolling mill according to the hot rolling times, so that the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard, and meanwhile, the heat dissipation area of the prepared heat insulation partition plate is larger, and the heat dissipation capacity of the heat insulation partition plate is improved.
Furthermore, the central control unit is also provided with a standard aluminum plate embossing thickness Ws, the thickness of the cold-rolled aluminum plate is controlled through the central control unit, the quality of the heat insulation partition plate can be effectively guaranteed, the thickness of the prepared automobile exhaust pipe heat insulation partition plate can meet the standard, meanwhile, the heat dissipation area of the prepared heat insulation partition plate is larger through the preparation method, and the heat dissipation capacity of the heat insulation partition plate is improved.
Furthermore, the central control unit is also provided with a maximum extrusion distance change value delta Dbmax of the cold rolling mill, the extrusion force of the cold rolling mill can be accurately controlled through the central control unit to control the extrusion distance change of the cold rolling mill, and the thickness of the prepared heat-insulating partition plate of the automobile exhaust pipe can meet the standard.
Furthermore, alloy elements are added in the mixture ratio, the content of main elements is optimized, and meanwhile, the heat treatment process is optimized, so that the strength and the toughness of the aluminum alloy material are further improved, and the strength, the toughness and the corrosion resistance of the heat insulation partition plate are further improved.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for manufacturing a heat insulating partition panel for an exhaust pipe of an automobile according to the present invention;
FIG. 2 is a schematic view of an apparatus for manufacturing a heat insulating partition plate of an automobile exhaust pipe according to the present invention.
Reference numerals: 1-a casting machine, 2-an aluminum plate, 3-a first detection device, 4-a hot rolling machine, 5-a second detection device, 6-a high-pressure water cooling device, 7-a cold rolling machine, 8-a third detection device and 9-a transmission device.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 2, a schematic diagram of an apparatus for manufacturing a heat insulating partition plate of an automobile exhaust pipe according to an embodiment of the present invention includes,
the fusion casting machine 1 is used for fusion casting the raw materials into an aluminum plate;
the detection devices are used for detecting the thickness of the aluminum plate at each stage, and in the embodiment, the number of the detection devices is preferably 3;
a hot rolling mill 4 for hot rolling the cast aluminum sheet;
the high-pressure water cooling device 6 is used for cooling the hot-rolled aluminum plate;
the cold rolling mill 7 is used for cold rolling the cooled aluminum plate;
a conveyor 9 for transporting the aluminum plates;
and the central control unit (not shown in the figure) is connected with the casting machine 1, the detection devices, the hot rolling machine 4, the high-pressure water cooling device 6, the cold rolling machine 7 and the conveying device 9 and is used for controlling the operation of the devices.
Specifically, the raw materials are placed into a casting machine according to the proportion, the central control unit controls the casting machine to be smelted into a melt at the temperature of 700-; naturally cooling to 480-500 ℃, starting a hot rolling mill by a central control unit to carry out hot rolling on the aluminum plate, wherein the hot rolling deformation is 80-86%; the central control unit starts the water cooling aluminum plate of the high-pressure water cooling device 6 to room temperature, then starts a cold rolling mill to cold roll the cooled aluminum plate, and the deformation of the cold rolling mill is kept at 55-60% each time; rolling to 0.5-7mm thickness; further, embossing is performed on the embossing roller; further, surface corrosion resistance treatment is performed.
Embodiment 1, an automobile exhaust pipe thermal insulation partition board, includes, by mass percent, Si: 0.2%, Fe: 0.3%, Cu: 0.1%, Mg: 0.3%, Cr: 0.4%, Zn: 0.4%, Ti: 0.3 percent and the balance of Al.
Embodiment 3, an automobile exhaust pipe thermal insulation partition board, includes by mass percent, Si: 0.6%, Fe: 0.8%, Cu: 0.4%, Mg: 2.5%, Cr: 0.4%, Zn: 0.4%, Ti: 0.3 percent and the balance of Al.
Specifically, the alloy elements are added in the mixture ratio, the content of the main elements is optimized, and the heat treatment process is optimized, so that the strength and the toughness of the aluminum alloy material are further improved, and the strength, the toughness and the corrosion resistance of the heat-insulating partition plate are further improved
Referring to fig. 1, a schematic flow chart of a method for manufacturing a heat insulation partition board of an automobile exhaust pipe according to an embodiment of the present invention includes,
step S1, adding the raw materials into a casting machine according to the raw material proportion, and starting the casting machine by a central control unit to prepare an aluminum plate;
step S2, the central control unit starts a conveyer to convey the aluminum plate in the step S1 to a hot rolling mill for hot rolling;
step S3, the central control unit conveys the aluminum plate subjected to the hot rolling in the step S2 to a cold rolling mill for cold rolling;
step S4, embossing the cold-rolled aluminum plate;
step S4, carrying out surface corrosion resistance treatment on the embossed aluminum plate;
in the step S2, the central control unit obtains the thickness W of the fused and cast aluminum plate through the first detection device, compares the thickness W of the fused and cast aluminum plate with the thickness of a preset fused and cast aluminum plate, and selects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit obtains the thickness W 'of the hot-rolled aluminum plate through a second detection device, compares the thickness W' of the hot-rolled aluminum plate with the preset thickness W0 of the hot-rolled aluminum plate, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit compares the corrected extrusion distance Dai' of the hot rolling mill with the minimum value Damin of the extrusion distance of the hot rolling mill, and judges whether to correct the extrusion speed of the hot rolling mill according to a comparison result; after the hot rolling is finished, the central control unit compares the hot rolling times K of the aluminum plate with preset hot rolling times K0, and corrects the preset extrusion distance Db of the cold rolling mill according to the comparison result;
in step S3, the central control unit obtains the cold-rolled aluminum plate thickness Wb through a third detection device, compares the cold-rolled aluminum plate thickness Wb with the standard aluminum plate embossed thickness Ws, and determines whether the extrusion distance of the cold rolling mill needs to be adjusted according to a comparison result.
Specifically, in the process of processing the heat-insulating partition plate, the thickness of the aluminum plate is controlled in real time by arranging the central control unit and the plurality of detection devices, the hot rolling mill and the cold rolling mill are adjusted in real time according to a real-time detection result, and the thickness of the prepared heat-insulating partition plate of the automobile exhaust pipe can meet the standard by monitoring the process of processing the heat-insulating partition plate in real time through the central control unit.
Specifically, when the heat insulation partition plate is prepared, the central control unit compares the thickness W of the fused and cast aluminum plate obtained by the first detection device with the thickness of a preset fused and cast aluminum plate and selects an extrusion distance Dai of the hot rolling mill according to a comparison result, wherein i is 1,2,3 and 4;
the central control unit is further provided with a first fused and cast aluminum plate thickness W1, a second fused and cast aluminum plate thickness W2, a third fused and cast aluminum plate thickness W3, a squeezing distance Da1 of a first hot rolling mill, a squeezing distance Da2 of a second hot rolling mill, a squeezing distance Da3 of a third hot rolling mill and a squeezing distance Da4 of a fourth hot rolling mill;
when W < W1, the central control unit sets the pressing distance of the hot rolling mill to Da 1;
when W1 is more than W and less than or equal to W2, the central control unit sets the extrusion distance of the hot rolling mill to Da 2;
when W2 is more than W and less than or equal to W3, the central control unit sets the extrusion distance of the hot rolling mill to Da 3;
when W > W3, the central control unit sets the pressing distance of the hot rolling mill to Da 4.
Specifically, when the heat insulation partition plate is prepared, the central control unit obtains the thickness W of the fused and cast aluminum plate through the first detection device, compares the thickness W with the thickness of a preset fused and cast aluminum plate, selects the extrusion distance Dai of the hot rolling mill according to a comparison result, can accurately master the extrusion distance of the hot rolling mill through the judgment of the thickness of the fused and cast aluminum plate by the central control unit, can effectively control the extrusion pressure of the hot rolling mill through selecting the extrusion distance of the hot rolling mill, further can enable the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe to meet the standard, and meanwhile, through the preparation method provided by the invention, the heat dissipation area of the prepared heat insulation partition plate is larger, and the heat dissipation capacity of the heat insulation partition plate is increased.
Specifically, the central control unit is further provided with a standard hot-rolled aluminum plate thickness W0, and when the thermal insulation partition plate is processed by the thermal insulation partition plate, the central control unit compares the hot-rolled aluminum plate thickness W' obtained by the second detection device with the standard hot-rolled aluminum plate thickness W0, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result;
if W' is less than or equal to W0, the central control unit judges that the thickness of the hot-rolled aluminum plate meets the standard and carries out the next step;
if W '> W0, the central control unit judges that the thickness of the hot-rolled aluminum plate does not meet the standard and corrects the extrusion distance of the hot rolling mill, the central control unit sets the corrected extrusion distance as Dai', sets Dai '═ Dai x (1- (W0-W')/W '), and after the correction is finished, the central control unit performs secondary extrusion on the hot-rolled aluminum plate until W' is less than or equal to W0.
Specifically, the central control unit is further provided with a standard hot-rolled aluminum plate thickness W0, when the heat insulation partition plate is machined, the thickness of the hot-rolled aluminum plate is judged, whether the thickness of the aluminum plate meets a preset standard or not is judged according to a comparison result, when the thickness of the hot-rolled aluminum plate does not meet the preset standard, the extrusion pressure is improved by correcting the extrusion distance of a hot rolling mill, and therefore the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard.
Specifically, the central control unit is further provided with a minimum hot mill extrusion distance Damin, and after the extrusion distance of the hot mill is corrected, the central control unit compares the corrected extrusion distance Dai' of the hot mill with the minimum hot mill extrusion distance Damin;
if Dai ' is not less than or equal to Damin, the central control unit judges that the extrusion distance of the hot rolling mill meets the standard and adjusts the extrusion distance of the hot rolling mill to Dai ' so as to carry out secondary extrusion on the hot-rolled aluminum plate until W ' is not more than W0;
if Dai ' is less than Damin, the central control unit judges that the extrusion distance of the hot rolling mill does not meet the standard and adjusts the extrusion distance of the hot rolling mill to Damin, after the adjustment is completed, the central control unit corrects the extrusion speed of the hot rolling mill to perform secondary extrusion on the hot-rolled aluminum plate until W ' is less than or equal to W0, the central control unit records the corrected extrusion speed of the hot rolling mill as V, and the V is set as V0 x (1- (Dai ' -Damin)/Damin), wherein V0 is the preset extrusion speed of the hot rolling mill.
Particularly, the central control unit is further provided with a minimum hot rolling mill extrusion distance Damin, the central control unit controls the extrusion distance of the hot rolling mill in real time in the process of processing the heat insulation partition plate, the extrusion distance and the extrusion speed of the hot rolling mill can be accurately mastered, the aluminum plate can be accurately extruded by mastering the extrusion distance and the extrusion speed of the hot rolling mill, and further the thickness of the prepared automobile exhaust pipe heat insulation partition plate can meet the standard.
Specifically, the central control unit is further provided with a standard hot rolling extrusion frequency K0, when the hot rolling mill finishes one extrusion on the cast aluminum plate, the central control unit records the extrusion frequency as K1, when the central control unit judges that W ' is not more than W0, the central control unit corrects the preset extrusion distance Db of the cold rolling mill according to the actual hot rolling mill extrusion frequency K, and the central control unit sets the extrusion distance of the cold rolling mill after correction as Db ' and sets Db ' as Db x (K/K0).
Specifically, the central control unit is further provided with standard hot rolling extrusion times K0, the extrusion force of the cold rolling mill can be accurately controlled by correcting the extrusion distance of the cold rolling mill according to the hot rolling times, and the thickness of the prepared automobile exhaust pipe heat insulation partition plate can meet the standard.
Specifically, the central control unit is further provided with a standard aluminum plate embossed thickness Ws, and when the cold rolling mill performs cold rolling at the extrusion distance Db', the central control unit compares the actual thickness Wb of the cold-rolled aluminum plate obtained by the third detection device with the standard aluminum plate embossed thickness Ws;
when Wb is less than or equal to Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate meets the standard, and embossing the aluminum plate;
and when Wb is larger than Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate does not meet the standard, and adjusts the corrected extrusion distance Db 'of the cold rolling mill to perform secondary extrusion on the aluminum plate, and sets Db' as Db ', and Db' (1- (Wb-Ws/Wb)) until Wb is less than or equal to Ws.
Specifically, the central control unit is further provided with a standard aluminum plate embossing thickness Ws, the thickness of the cold-rolled aluminum plate is controlled through the central control unit, the quality of the heat insulation partition plate can be effectively guaranteed, the thickness of the prepared automobile exhaust pipe heat insulation partition plate can meet the standard, meanwhile, the heat dissipation area of the prepared heat insulation partition plate is larger through the preparation method, and the heat dissipation capacity of the heat insulation partition plate is improved.
Specifically, the central control unit is further provided with a maximum extrusion distance change value delta Dbmax of the cold rolling mill, when the central control unit adjusts the extrusion distance of the cold rolling mill to Db ″, the central control unit calculates an actual extrusion distance change value delta Db of the cold rolling mill, sets delta Db ═ Db '-Db' |, and compares the calculated extrusion distance change value delta Db with the maximum extrusion distance change value delta Dbmax of the cold rolling mill;
when the delta Db is less than or equal to the delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill meets the standard, and adjusts the extrusion distance of the cold rolling mill to Db';
when delta Db > -delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill does not meet the standard, and the central control unit adjusts the extrusion distance of the cold rolling mill to Dbmin; wherein Dbmin is the minimum extrusion distance of the cold rolling mill.
Specifically, the central control unit is also provided with a maximum extrusion distance change value delta Dbmax of the cold rolling mill, the extrusion force of the cold rolling mill can be accurately controlled through the central control unit to control the extrusion distance change of the cold rolling mill, and the thickness of the prepared heat insulation partition plate of the automobile exhaust pipe can meet the standard.
Specifically, when the central control unit determines that the cold rolling mill extrusion distance change does not meet the criterion, the central control unit corrects the extrusion speed of the cold rolling mill, and the central control unit sets the corrected extrusion speed of the cold rolling mill to Vb ', Vb' ═ Vb x (1- Δ Db/. DELTA.Dbmax), where Vb is the extrusion speed of a preset cold rolling mill.
Specifically, when the central control unit judges that the extrusion distance change of the cold rolling mill does not meet the standard, the central control unit corrects the extrusion speed of the cold rolling mill, and controls the extrusion intensity of the cold rolling mill through the control of the extrusion speed of the cold rolling mill, so that the thickness of the prepared automobile exhaust pipe heat insulation partition plate can meet the standard.
Specifically, the central control unit is further provided with a maximum correction number N0, and when the central control unit completes one correction to the hot rolling mill or the cold rolling mill, the central control unit records the correction number as N equal to 1, and when the central control unit completes j corrections to the hot rolling mill or the cold rolling mill, j equal to 1,2,3,.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously 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.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing a heat insulation clapboard of an automobile exhaust pipe is characterized by comprising the following steps of,
step S1, adding the raw materials into a casting machine according to the raw material proportion, and starting the casting machine by a central control unit to prepare an aluminum plate;
step S2, the central control unit starts a conveyer to convey the aluminum plate in the step S1 to a hot rolling mill for hot rolling;
step S3, the central control unit conveys the aluminum plate subjected to the hot rolling in the step S2 to a cold rolling mill for cold rolling;
step S4, embossing the cold-rolled aluminum plate;
step S4, carrying out surface corrosion resistance treatment on the embossed aluminum plate;
in the step S2, the central control unit obtains the thickness W of the fused and cast aluminum plate through the first detection device, compares the thickness W of the fused and cast aluminum plate with the thickness of a preset fused and cast aluminum plate, and selects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit obtains the thickness W 'of the hot-rolled aluminum plate through a second detection device, compares the thickness W' of the hot-rolled aluminum plate with the preset thickness W0 of the hot-rolled aluminum plate, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result; the central control unit compares the corrected extrusion distance Dai' of the hot rolling mill with the minimum value Damin of the extrusion distance of the hot rolling mill, and judges whether to correct the extrusion speed of the hot rolling mill according to a comparison result; after the hot rolling is finished, the central control unit compares the hot rolling times K of the aluminum plate with preset hot rolling times K0, and corrects the preset extrusion distance Db of the cold rolling mill according to the comparison result;
in step S3, the central control unit obtains the cold-rolled aluminum plate thickness Wb through a third detection device, compares the cold-rolled aluminum plate thickness Wb with the standard aluminum plate embossed thickness Ws, and determines whether the extrusion distance of the cold rolling mill needs to be adjusted according to a comparison result.
2. The method for manufacturing a heat insulating partition plate of an automobile exhaust pipe according to claim 1, wherein when the heat insulating partition plate is manufactured, the central control unit compares a thickness W of the molten aluminum plate obtained by the first detection device with a preset thickness of the molten aluminum plate, and selects an extrusion distance Dai of the hot rolling mill according to a comparison result, wherein i is 1,2,3, 4;
the central control unit is further provided with a first fused and cast aluminum plate thickness W1, a second fused and cast aluminum plate thickness W2, a third fused and cast aluminum plate thickness W3, a squeezing distance Da1 of a first hot rolling mill, a squeezing distance Da2 of a second hot rolling mill, a squeezing distance Da3 of a third hot rolling mill and a squeezing distance Da4 of a fourth hot rolling mill;
when W < W1, the central control unit sets the pressing distance of the hot rolling mill to Da 1;
when W1 is more than W and less than or equal to W2, the central control unit sets the extrusion distance of the hot rolling mill to Da 2;
when W2 is more than W and less than or equal to W3, the central control unit sets the extrusion distance of the hot rolling mill to Da 3;
when W > W3, the central control unit sets the pressing distance of the hot rolling mill to Da 4.
3. The method for manufacturing a thermal insulation partition board of an automobile exhaust pipe according to claim 2, wherein the central control unit is further provided with a standard hot-rolled aluminum plate thickness W0, and when the thermal insulation partition board is processed by the central control unit, the central control unit compares the hot-rolled aluminum plate thickness W' obtained by the second detection device with the standard hot-rolled aluminum plate thickness W0, and corrects the extrusion distance Dai of the hot rolling mill according to the comparison result;
if W' is less than or equal to W0, the central control unit judges that the thickness of the hot-rolled aluminum plate meets the standard and carries out the next step;
if W '> W0, the central control unit judges that the thickness of the hot-rolled aluminum plate does not meet the standard and corrects the extrusion distance of the hot rolling mill, the central control unit sets the corrected extrusion distance as Dai', sets Dai '═ Dai x (1- (W0-W')/W '), and after the correction is finished, the central control unit performs secondary extrusion on the hot-rolled aluminum plate until W' is less than or equal to W0.
4. The method for manufacturing a heat-insulating partition plate of an automobile exhaust pipe according to claim 3, wherein the central control unit is further provided with a minimum hot-rolling mill extrusion distance Damin, and after the extrusion distance correction of the hot-rolling mill is completed, the central control unit compares the corrected extrusion distance Dai' of the hot-rolling mill with the minimum hot-rolling mill extrusion distance Damin;
if Dai ' is not less than or equal to Damin, the central control unit judges that the extrusion distance of the hot rolling mill meets the standard, and adjusts the extrusion distance of the hot rolling mill to Dai ' so as to carry out secondary extrusion on the hot-rolled aluminum plate until W ' is not more than W0;
if Dai ' is less than Damin, the central control unit judges that the extrusion distance of the hot rolling mill does not meet the standard and adjusts the extrusion distance of the hot rolling mill to Damin, after the adjustment is completed, the central control unit corrects the extrusion speed of the hot rolling mill to perform secondary extrusion on the hot-rolled aluminum plate until W ' is less than or equal to W0, the central control unit sets the corrected extrusion speed of the hot rolling mill to be V, and V is set to be V0 x (1- (Dai ' -Damin)/Damin), wherein V0 is the preset extrusion speed of the hot rolling mill.
5. The method for manufacturing a thermal insulation partition board for an automobile exhaust pipe according to claim 4, wherein the central control unit is further provided with a standard hot rolling extrusion number K0, when the hot rolling mill completes one extrusion of the cast aluminum plate, the central control unit records the extrusion number as K equal to 1, when the central control unit determines that W ' is less than or equal to W0, the central control unit corrects the preset extrusion distance Db of the cold rolling mill according to the actual extrusion number K of the hot rolling mill, and the central control unit sets the extrusion distance of the cold rolling mill after correction as Db ' and sets Db ' as Db x (K/K0).
6. The method for manufacturing a heat insulating partition plate for an automobile exhaust pipe according to claim 5, wherein the central control unit is further provided with a standard aluminum plate embossed thickness Ws, and when the cold rolling mill performs cold rolling at an extrusion distance Db', the central control unit compares the actual thickness Wb of the cold-rolled aluminum plate obtained by the third detection device with the standard aluminum plate embossed thickness Ws;
when Wb is less than or equal to Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate meets the standard, and embossing the aluminum plate;
and when Wb is larger than Ws, the central control unit judges that the thickness of the cold-rolled aluminum plate does not meet the standard, and adjusts the corrected extrusion distance Db 'of the cold rolling mill to perform secondary extrusion on the aluminum plate, and sets Db' as Db ', and Db' (1- (Wb-Ws/Wb)) until Wb is less than or equal to Ws.
7. The method for manufacturing a heat-insulating partition board of an automobile exhaust pipe according to claim 6, wherein the central control unit is further provided with a maximum extrusion distance change value Δ Dbmax of the cold rolling mill, when the central control unit adjusts the extrusion distance of the cold rolling mill to Db ″, the central control unit calculates an actual extrusion distance change value Δ Db of the cold rolling mill, sets Δ Db ═ Db "-Db' |, and compares the calculated extrusion distance change value Δ Db with the maximum extrusion distance change value Δ Dbmax of the cold rolling mill;
when the delta Db is less than or equal to the delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill meets the standard, and adjusts the extrusion distance of the cold rolling mill to Db';
when delta Db > -delta Dbmax, the central control unit judges that the extrusion distance change of the cold rolling mill does not meet the standard, and the central control unit adjusts the extrusion distance of the cold rolling mill to Dbmin; wherein Dbmin is the minimum extrusion distance of the cold rolling mill.
8. The method for manufacturing a heat-insulating separator for an exhaust pipe of an automobile according to claim 7, wherein when the central control unit determines that the variation in the extrusion distance of the cold rolling mill does not meet the standard, the central control unit corrects the extrusion speed of the cold rolling mill, and the central control unit sets the corrected extrusion speed of the cold rolling mill to Vb', Vb ═ Vb x (1- Δ Db/. DELTA.Dbmax), wherein Vb is the extrusion speed of the preset cold rolling mill.
9. The method for manufacturing a heat insulating partition board of an automobile exhaust pipe according to claim 8, wherein the central control unit is further provided with a maximum correction number N0, when the central control unit completes one correction to the hot rolling mill or the cold rolling mill, the central control unit records the correction number as N equal to 1, when the central control unit completes j corrections to the hot rolling mill or the cold rolling mill, j equal to 1,2, 3.
10. The heat insulation partition board of the automobile exhaust pipe is characterized by comprising the following components in percentage by mass: 0.2-0.6%, Fe: 0.3-0.8%, Cu: 0.1-0.4%, Mg: 0.3-2.5%, Cr: 0.4%, Zn: 0.4%, Ti: 0.3 percent and the balance of Al.
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