CN111250931A - Manufacturing method of aluminum alloy automobile hub - Google Patents
Manufacturing method of aluminum alloy automobile hub Download PDFInfo
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- CN111250931A CN111250931A CN202010091808.0A CN202010091808A CN111250931A CN 111250931 A CN111250931 A CN 111250931A CN 202010091808 A CN202010091808 A CN 202010091808A CN 111250931 A CN111250931 A CN 111250931A
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Abstract
The invention discloses a manufacturing method of an aluminum alloy automobile hub, which comprises the following steps: placing the aluminum alloy hat-shaped blank between a rotary forging core mold and a rotary forging outer mold, wherein the opening of the aluminum alloy hat-shaped blank faces downwards, rotary forging the upper end of the aluminum alloy hat-shaped blank by using a rotary forging male mold, axially rolling the spoke of the aluminum alloy hat-shaped blank by using the rotary forging male mold, and forging the material of the aluminum alloy hat-shaped blank to the rim to form a rotary forging blank; and putting the rotary forging blank into a hub fine blank die of a spinning machine, wherein the opening of the rotary forging blank faces downwards, spinning the side wall of the rotary forging blank by a spinning wheel to thin the thickness of the side wall of the rotary forging blank, and molding the rim of the rotary forging blank according to the hub fine blank die to form the hub fine blank. The spoke is forged by adopting the rotary forging, the spoke is axially rolled, the material is rolled and forged to the rim, the product forming precision is high, the allowance left for machining is small, and the machining time can be reduced; compared with the spinning formed wheel rim and spoke, the wheel rim and spoke have higher strength and better performance.
Description
Technical Field
The invention relates to a manufacturing method of an automobile hub, in particular to a manufacturing method of an aluminum alloy automobile hub.
Background
The existing automobile hub manufacturing mainly comprises casting and forging, wherein the forging uses an aluminum alloy round bar as a raw material, the processing technology comprises hot forging, heat treatment and machining, and the manufacturing technology has high energy consumption, serious pollution, large equipment investment and high requirement on the aluminum alloy round bar as the raw material; in the prior art, an aluminum plate is used for manufacturing a truck wheel through spinning, the used processes are powerful spinning, heat treatment and machining, and the problems in actual production are that the precision of a spun truck wheel blank is not suitable to be controlled, the reserved machining allowance is large, the time consumption of machining is long, the size thickness of the aluminum plate is 35mm, and the diameter of the aluminum plate is 780 mm.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a manufacturing method of an aluminum alloy automobile hub, which can improve the forming precision and strength of a hub blank, reduce machining allowance and shorten machining time.
According to the embodiment of the first aspect of the invention, the manufacturing method of the aluminum alloy automobile hub comprises the following steps:
1) performing rotary forging, namely placing the aluminum alloy hat-shaped blank between a rotary forging core mold and a rotary forging outer mold, wherein the opening of the aluminum alloy hat-shaped blank faces downwards, performing rotary forging on the upper end of the aluminum alloy hat-shaped blank by using a rotary forging male mold, performing axial rolling on a spoke of the aluminum alloy hat-shaped blank by using the rotary forging male mold, and forging the material of the aluminum alloy hat-shaped blank to a rim in a rotary forging manner to form a rotary forging blank;
2) and (3) spinning forming, namely putting the rotary forging blank into a hub fine blank die of a spinning machine, wherein the opening of the rotary forging blank faces downwards, spinning the side wall of the rotary forging blank by a spinning wheel to thin the thickness of the side wall of the rotary forging blank, and forming the rim of the rotary forging blank according to the hub fine blank die to form the hub fine blank.
According to the manufacturing method of the aluminum alloy automobile hub, after the step 2), heat treatment and machining are carried out, the hub finished blank is subjected to solid solution and aging treatment, and the heat-treated hub finished blank is machined through a numerical control lathe and machining center machining equipment to manufacture the aluminum alloy automobile hub.
According to the manufacturing method of the aluminum alloy automobile hub, which is disclosed by the embodiment of the first aspect of the invention, a 6061 aluminum alloy circular plate is used for obtaining an aluminum alloy hat-shaped blank through spinning, forging, rolling or hydraulic forming.
According to the manufacturing method of the aluminum alloy automobile hub provided by the embodiment of the first aspect of the invention, the elongation of the 6061 aluminum alloy circular plate is more than 20%.
According to the manufacturing method of the aluminum alloy automobile hub, provided by the embodiment of the first aspect of the invention, the 6061 aluminum alloy circular plate has Sc, wherein the content of Sc is 0.1-0.3 wt%.
According to the manufacturing method of the aluminum alloy automobile hub provided by the embodiment of the first aspect of the invention, the 6061 aluminum alloy round plate has the thickness of 20-40mm and the diameter of 300-800 mm.
According to the manufacturing method of the aluminum alloy automobile hub, a circle of spherical protrusions are arranged on the lower end face of the rotary forging male die, and during rotary forging, the spherical protrusions form spoke rim grooves on the upper surface of spokes.
According to the manufacturing method of the aluminum alloy automobile hub, a rim forming cavity located at the upper part and a positioning cavity located at the lower part are formed between the rotary forging outer die and the rotary forging core die, and the width of the rim forming cavity gradually decreases along the upward and downward direction.
According to the manufacturing method of the aluminum alloy automobile hub provided by the embodiment of the first aspect of the invention, when the aluminum alloy cap-shaped blank is subjected to rotary forging, the swing angle is 1.5-3 degrees, the working speed is 0.3-8mm/s, the revolution speed of the rotary forging male die is 100-5500 KN, and the nominal force is 3500-5500 KN.
According to the manufacturing method of the aluminum alloy automobile hub, cold pendulum rolling forming, warm pendulum rolling forming or hot pendulum rolling forming is adopted in pendulum rolling forging.
The invention has the beneficial effects that: the invention adopts the rotary forging to forge the spoke, carries out axial rolling to the spoke, and forges the material to the rim by rotary forging, the product forming precision is high, the allowance left for machining is less, and the machining time can be reduced; compared with the spinning formed wheel rim and spoke, the wheel rim and spoke have higher strength and better performance. Because the material of rim comes from the spoke, reduces to the requirement of aluminum alloy plate thickness and diameter, compares with spinning forming process, and for same size wheel hub, the diameter of aluminum alloy plate is reduced from 780mm to 760mm, and the thickness of aluminum alloy plate is reduced from 35mm to 32mm, has reduced the use amount of material, by a wide margin the cost of reduction product.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a schematic illustration of spinning a 6061 aluminum alloy circular plate into an aluminum alloy hat blank in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a method for rolling an aluminum alloy hat-shaped blank into a rolled blank according to an embodiment of the present invention;
FIG. 3 is a schematic view of a rotary forging blank being spun into a hub finish blank according to an embodiment of the present invention;
FIG. 4 is a top view of an aluminum alloy automobile hub in an embodiment of the present invention;
FIG. 5 is a cross-sectional view of an aluminum alloy automobile hub in an embodiment of the invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 2 to 5, the manufacturing method of the aluminum alloy automobile hub comprises the following steps:
1) performing rotary forging, namely placing the aluminum alloy hat-shaped blank 21 between a rotary forging core mold 13 and a rotary forging outer mold 14, wherein the opening of the aluminum alloy hat-shaped blank 21 faces downwards, performing rotary forging on the upper end of the aluminum alloy hat-shaped blank 21 by using a rotary forging convex mold 16, performing axial rolling on a spoke of the aluminum alloy hat-shaped blank 21 by using the rotary forging convex mold 16, performing rotary forging on the material of the aluminum alloy hat-shaped blank 21 to a rim 23 to form a rotary forging blank 22, and adding cooling liquid in the rotary forging process; stopping the machine, jacking the rotary forging blank 22 through the rotary forging jacking rod 15, and taking down the rotary forging blank; in the process, parameters of the rotary forging are as follows: the nominal force is 3500 plus 5500KN, the swing angle is 2 degrees, the working speed is 0.3-8mm/s, the revolution speed of the swing and rolling male die 16 is 100-120r/min, the return stroke is 80mm/s, the ejection force is 100KN, and the nominal force is 3500 plus 5500KN, wherein the cooling liquid is a mixture of water and emulsion;
2) spin forming, namely putting the rotary forging blank 22 into a hub fine blank die of a spinning machine, enabling an opening of the rotary forging blank 22 to face downwards, roughly rotating the rotary forging blank 22 through a rough spinning wheel 10, thinning and lengthening the thickness of the side wall of the rotary forging blank 22, enabling the downward stroke of the rough spinning wheel 10 to be 151mm, enabling the inner wall of the rotary forging blank 22 to be attached to the hub fine blank die, finely spinning the rotary forging blank 22 along with the back of the rough spinning wheel 10 by a fine spinning wheel 30 during rough spinning, enabling the side wall of the rotary forging blank 22 to be gradually thinned, enabling the downward stroke of the fine spinning wheel 30 to be 186mm, forming a rim of the rotary forging blank 22 according to the hub fine blank die to form a hub fine blank 25, and ejecting the hub fine blank 25 through a fine blank ejecting rod 15; in the spinning process, cooling liquid is added for cooling, so that the rolling blank 22 is prevented from being overhigh in temperature and has a lubricating effect; in the foregoing process, the parameters of spinning are as follows: the rotating speed of the main shaft is 165r/min, the rough screw feeding speed is 1.7mm/r, the screw feeding amount during rough screw is 4-7 mm, the fine screw feeding speed is 1.6mm/r, the screw feeding amount during fine screw is 2-3 mm, the transverse feeding force is 450KN, and the longitudinal feeding force is 350 KN.
In the method, during rotary forging, the workpiece is subjected to local cyclic deformation instead of the overall deformation in the conventional forging. Therefore, the device has the obvious advantage of labor saving. Compared with the conventional forging equipment, the machine can save 10-15 times of labor, so that the machine can replace the large-tonnage conventional forging equipment to heat and forge a forge piece to be formed by cold and warm pendulum rolling, the environmental protection requirement is met, and the energy is saved and the consumption is reduced. The rotary forging deformation is uniform, and the metal streamline is good; the same workpiece is processed, and the rotary forging machine has the characteristics of light weight, less energy consumption, less investment and the like compared with the conventional forging equipment; the rotary forging part has high precision, low roughness, few cutting and high efficiency.
In some embodiments, after the step 2), heat treatment and machining are performed, the hub fine blank 25 is subjected to solution treatment and aging treatment with reference to a T6 heat treatment process of 6061 aluminum alloy, the strength of the hub fine blank 25 is enhanced, and the heat-treated hub fine blank 25 is processed through a numerical control lathe and a machining center machining device to manufacture the aluminum alloy automobile hub.
In some embodiments, the 6061 aluminum alloy circular plate 20 is used to obtain the aluminum alloy hat blank 21 through a spinning, forging or hydroforming process. Taking spinning forming as an example, the included angle between the axis of the coarse spinning wheel 10 and the axis of the 6061 aluminum alloy circular plate 20 is 30-50 degrees. The included angle between the axis of the fine spinning wheel 30 and the axis of the 6061 aluminum alloy circular plate 20 is 30-50 degrees. As shown in fig. 1, a through hole is punched in the middle of a 6061 aluminum alloy circular plate 20, the 6061 aluminum alloy circular plate 20 with the through hole is placed in a hub blank mold 11, an included angle between the axis of a coarse spinning wheel 10 and the axis of the 6061 aluminum alloy circular plate 20 is 30 °, the coarse spinning wheel 10 performs coarse spinning on the 6061 aluminum alloy circular plate 20, the downward stroke of the coarse spinning wheel 10 during coarse spinning is 200mm, the fine spinning wheel 30 performs fine spinning on the aluminum alloy circular plate 20 after the coarse spinning wheel 10, during fine spinning, the included angle between the axis of the fine spinning wheel 30 and the axis of the 6061 aluminum alloy circular plate 20 is 30 °, the downward stroke of the fine spinning wheel 30 is 250mm, so that the aluminum alloy circular plate is molded according to the hub blank mold 11, and an aluminum alloy hat-shaped blank 21 is formed. Wherein the parameters during spinning are as follows: the main shaft rotating speed is 165r/min, the rough screw feeding speed is 1.2mm/r, the rough screw feeding amount is 0-11 mm, the fine screw feeding speed is 1.5mm/r, the fine screw feeding amount is 0-12.5 mm, the transverse feeding force is 450KN, and the longitudinal feeding force is 350 KN.
In some embodiments, the elongation of the 6061 aluminum alloy circular plate 20 is above 20%. Specifically, the elongation of the 6061 aluminum alloy circular plate 20 is mainly more than 20% of the elongation of the 6061 aluminum alloy, and the high elongation causes no cracking, high plasticity and convenient processing in spin forming and pendulum rolling forming.
In some embodiments, the 6061 aluminum alloy circular plate 20 has Sc, which is scandium. Wherein the content of Sc is 0.1-0.3 wt%. wt% means weight content percentage, wt is shorthand for English weight. Wherein, after adding a trace amount of Sc into 6061 aluminum alloy, carrying out special heat treatment, wherein the special heat treatment can be heating to 380-420 ℃, keeping the temperature for 240 minutes, and optimizing the performance, so that the tensile strength of the 6061 aluminum alloy circular plate is less than 150Pa, the yield strength is less than 85MPa, the elongation is 19-25%, and the forming effect is good before T6 heat treatment; the elongation is more than 26%, and the forming effect is better than that of a 6061 aluminum alloy circular plate with the elongation of 19-25%; after the working, it was found that the elongation of the 6061 aluminum alloy disk was 27% or 30%, the forming effect was more excellent. A6061 aluminum alloy plate with a certain thickness is selected, round material distribution is conducted on the plate, an aluminum alloy circular plate required by spinning processing is formed, the aluminum alloy circular plate is punched, and preparation is made for forming of the aluminum alloy cap-shaped blank 21.
In some embodiments, the 6061 aluminum alloy circular plate 20 has a thickness of 32m and a diameter of 760 mm. The spoke and the rim 23 are formed by using the rotary forging, the flowing amount of the side wall material of the aluminum alloy hat-shaped blank 21 to the spoke and the rim 23 is reduced, the forming effect of the spoke and the rim 23 is good, the precision is high, and the size of the aluminum alloy hat-shaped blank 21 can be reduced, and the aluminum alloy hat-shaped blank 21 is formed by spinning a 6061 aluminum alloy circular plate 20, so the size of the diameter and the thickness of the 6061 aluminum alloy circular plate 20 is reduced.
In some embodiments, as shown in fig. 2, the lower end surface of the forging punch 16 is provided with a ring of spherical protrusions 17, and during forging, the spherical protrusions 17 form spoke rim grooves 24 on the upper surface of the spoke. In the process of the rotary forging, the spherical protrusions 17 are matched with the rotary forging angle, the spoke rim grooves 24 are formed on the upper surface of the spoke, the spoke rim grooves 24 mainly play a role in primary forming, and the spoke rim grooves 24 need to be further finely machined through subsequent machining.
In some embodiments, a rim 23 forming cavity located at the upper part and a positioning cavity located at the lower part are formed between the external rolling die 14 and the external rolling die 13, and the width of the rim 23 forming cavity gradually decreases in the up-down direction. Specifically, the outer surface of the rotary forging core die 13 is a cylindrical surface, the lower part of the rotary forging outer die 14 is a cylindrical surface, the upper part of the rotary forging outer die 14 is a conical surface, the diameter of the upper end of the conical surface is larger than the diameter of the lower end of the conical surface, and after the rotary forging outer die 14 and the rotary forging core die 13 are placed, a rim 23 forming cavity gradually reduced along the up-down direction and a positioning cavity with unchanged width are formed, so that during rotary forging, the rotary forging male die 16 drives the material of the spoke to flow along the radial direction, and a required rim 23 is formed in the rim 23 forming cavity.
In some embodiments, when the aluminum alloy cap blank 21 is subjected to rotary forging, the rotary angle is 1.5-3 °, the working speed is 1.6-0.6mm/s, and the revolving speed of the rotary forging punch 16 is 100-120 r/min. Preferably, the angle of oscillation is 2 °. The forging punch 16 forces the material of the spokes to flow radially and form the desired rim 23 in the cavity in which the rim 23 is formed. The spherical protrusions 17 are matched with the rolling angle, spoke rim grooves 24 are formed in the upper surface of the spoke, and the spoke rim grooves 24 mainly play a role in preliminary rim forming.
In some embodiments, the rotary forging adopts cold rotary forging, warm rotary forging or hot rotary forging. When the cold pendulum rolling is formed, cooling liquid needs to be added into the aluminum alloy hat-shaped blank 21 every 5 seconds, the cold pendulum rolling does not need to heat the workpiece, the cost is reduced, the pendulum rolling precision is higher, and the strength is better. When the warm pendulum rolling is formed, the aluminum alloy hat-shaped blank 21 needs to be heated and then placed between the pendulum rolling core mold 13 and the pendulum rolling outer mold 14, the aluminum alloy hat-shaped blank 21 is formed through the pendulum rolling convex mold 16, the warm pendulum rolling needs to heat a workpiece, the heated workpiece is easier to form by pendulum rolling, the nominal force of the pendulum rolling machine can be reduced, and the equipment investment is reduced.
The preferred embodiment is that a 6061 aluminum alloy circular plate 20 is selected, the tensile strength of the 6061 aluminum alloy circular plate 20 is less than 150Pa, the yield strength is less than 85MPa before T6 heat treatment, the elongation is 19-25%, and the forming effect is good; the elongation is more than 26%, and the forming effect is better than that of a 6061 aluminum alloy circular plate with the elongation of 19-25%; after processing, the forming effect is better when the elongation of the 6061 aluminum alloy circular plate is 27% or 30%, and the manufacturing method of the aluminum alloy automobile hub comprises the following steps:
1) the diameter is 760mm, thickness is 32 mm's 6061 aluminum alloy plectane 20 die-cut a through-hole in the middle part, place 6061 aluminum alloy plectane 20 of band-pass hole in wheel hub blank mould 11, the contained angle between the axis of spinning wheel 10 and the axis of 6061 aluminum alloy plectane 20 is 30, carry out thick the spin to 6061 aluminum alloy plectane 20 through thick pinch roller 10, thick stroke that the spinning wheel 10 descends during thick the spin is 200mm, when thick the spin, fine the spinning wheel 30 is followed closely and is carried out the finish spin to aluminum alloy plectane 20 at the back of thick spinning wheel 10, when fine the spin, the contained angle between the axis of fine spinning wheel 30 and the axis of 6061 aluminum alloy plectane 20 is 30, fine the descending stroke of fine spinning wheel 30 is 250mm during the finish spin, make the aluminum alloy plectane follow wheel hub blank mould 11 shaping, form aluminum alloy cap form. Wherein the parameters during spinning are as follows: the rotating speed of the main shaft is 165r/min, the rough screw feeding speed is 1.2mm/r, the rough screw feeding amount is 0-11 mm, the fine screw feeding speed is 1.5mm/r, the fine screw feeding amount is 0-12.5 mm, the transverse feeding force is 450KN, and the longitudinal feeding force is 350 KN; the concrete shape is shown in fig. 1, wherein the part framed and selected by the dotted line is a 6061 aluminum alloy circular plate 20, and the aluminum alloy cap-shaped blank 21 covers the outside of the hub blank die 11;
2) performing rotary forging, namely placing a hat-shaped aluminum alloy hat-shaped blank 21 between a rotary forging core die 13 and a rotary forging outer die 14, wherein the opening of the aluminum alloy hat-shaped blank 21 faces downwards, performing rotary forging on the upper end of the aluminum alloy hat-shaped blank 21 by using a rotary forging terrace die 16, performing axial rolling on a spoke of the aluminum alloy hat-shaped blank 21 by using the rotary forging terrace die 16, performing rotary forging on the material of the aluminum alloy hat-shaped blank 21 to a rim 23, driving the material of the spoke to flow along the radial direction by using the rotary forging terrace die 16, forming a required rim 23 in a rim 23 forming cavity, matching a spherical bulge 17 with a rotary forging angle, forming a spoke rim groove 24 on the upper surface of the spoke to form a rotary forging blank 22, and adding cooling liquid in the rotary forging process; stopping the machine, jacking the rotary forging blank 22 through the rotary forging jacking rod 15, and taking down the rotary forging blank; in the process, parameters of the rotary forging are as follows: the nominal force is 3500-5500KN, the swing angle is 2 degrees, the working speed is 0.3-8mm/s, the revolution speed of the swing and rolling male die 16 is 100-120r/min, the return stroke is 80mm/s, and the ejection force is 100 KN; the concrete shape is shown in fig. 2, wherein the part framed and selected by the dotted line is an aluminum alloy cap-shaped blank 21, and the workpiece filled with the rim 23 forming cavity and the positioning cavity is a rolling blank 22;
3) spin forming, namely putting a rotary blank 22 into a hub fine blank 25 die of a spinning machine, enabling the opening of the rotary blank 22 to face downwards, enabling the axis of a rough spinning wheel 10 to be parallel to the axis of the rotary blank 22, roughly spinning the rotary blank 22 through the rough spinning wheel 10, thinning and lengthening the thickness of the side wall of the rotary blank 22, enabling the downward stroke of the rough spinning wheel 10 to be 151mm, enabling the inner wall of the rotary blank 22 to be attached to the hub fine blank 25 die, roughly spinning while precisely spinning, enabling the fine spinning wheel 30 to precisely spin the rotary blank 22 along with the back of the rough spinning wheel 10, enabling the side wall of the rotary blank 22 to be gradually thinned, enabling the downward stroke of the fine spinning wheel 30 to be 186mm, forming the hub fine blank 25 by enabling the rim of the rotary blank 22 to be molded according to the hub fine blank 25 die, ejecting the hub fine blank 25 through a fine blank ejecting rod 15, and taking down the hub fine blank; in the spinning process, cooling liquid is added for cooling, so that the over-high temperature of the rotary forging blank 22 is avoided; in the foregoing process, the parameters of spinning are as follows: the rotating speed of the main shaft is 165r/min, the rough screw feeding speed is 1.7mm/r, the screw feeding amount during rough screw is 4-7 mm, the fine screw feeding speed is 1.6mm/r, the screw feeding amount during fine screw is 2-3 mm, the transverse feeding force is 450KN, and the longitudinal feeding force is 350 KN; the concrete shape is shown in fig. 3, wherein the dotted line frame part is a rolling blank 22, and the solid line frame part is a hub fine blank 25;
4) and (3) performing heat treatment and machining, namely performing solid solution and aging treatment on the hub refined blank 25 by referring to a T6 heat treatment process of 6061 aluminum alloy to enhance the strength of the hub refined blank 25, and machining the hub refined blank 25 after heat treatment by using a numerical control lathe and machining center machining equipment to prepare the aluminum alloy automobile hub.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. The manufacturing method of the aluminum alloy automobile hub is characterized by comprising the following steps:
1) performing rotary forging, namely placing the aluminum alloy hat-shaped blank between a rotary forging core mold and a rotary forging outer mold, wherein the opening of the aluminum alloy hat-shaped blank faces downwards, performing rotary forging on the upper end of the aluminum alloy hat-shaped blank by using a rotary forging male mold, performing axial rolling on a spoke of the aluminum alloy hat-shaped blank by using the rotary forging male mold, and forging the material of the aluminum alloy hat-shaped blank to a rim in a rotary forging manner to form a rotary forging blank;
2) and (3) spinning forming, namely putting the rotary forging blank into a hub fine blank die of a spinning machine, wherein the opening of the rotary forging blank faces downwards, spinning the side wall of the rotary forging blank by a spinning wheel to thin the thickness of the side wall of the rotary forging blank, and forming the rim of the rotary forging blank according to the hub fine blank die to form the hub fine blank.
2. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: and 2) performing heat treatment and machining, performing solid solution and aging treatment on the hub finished blank, and machining the heat-treated hub finished blank through a numerical control lathe and machining equipment of a machining center to prepare the aluminum alloy automobile hub.
3. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: and (3) using a 6061 aluminum alloy circular plate to obtain an aluminum alloy hat-shaped blank through spinning, forging, rolling or hydraulic forming.
4. The method for manufacturing the aluminum alloy automobile hub according to claim 3, is characterized in that: the elongation of the 6061 aluminum alloy disk is more than 20%.
5. The method for manufacturing the aluminum alloy automobile hub according to claim 3, is characterized in that: the 6061 aluminum alloy circular plate has Sc, wherein the content of Sc is 0.1-0.3 wt%.
6. The method for manufacturing the aluminum alloy automobile hub according to claim 3, is characterized in that: the 6061 aluminum alloy round plate has the thickness of 20-40mm and the diameter of 300-800 mm.
7. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: the lower end face of the rotary forging male die is provided with a circle of spherical protrusions, and in the rotary forging process, the spherical protrusions form spoke rim grooves on the upper surface of a spoke.
8. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: and a rim forming cavity positioned on the upper part and a positioning cavity positioned on the lower part are formed between the rotary forging outer die and the rotary forging core die, and the width of the rim forming cavity is gradually reduced along the upward and downward directions.
9. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: when the aluminum alloy cap-shaped blank is subjected to rotary forging, the swing angle is 1.5-3 degrees, the working speed is 0.3-8mm/s, the revolution speed of the rotary forging male die is 100-5500 KN, and the nominal force is 3500-5500 KN.
10. The method for manufacturing the aluminum alloy automobile hub according to claim 1, is characterized in that: the rotary forging adopts cold rotary forging, warm rotary forging or hot rotary forging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114473370A (en) * | 2021-12-15 | 2022-05-13 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
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| CN1198691A (en) * | 1996-08-05 | 1998-11-11 | 株式会社金光 | Method of molding cylindrical portion of central bore-carrying sheet metal |
| CN101491873A (en) * | 2009-03-06 | 2009-07-29 | 河南科技大学 | Two-step plasticity forming method of vehicle wheel hub and mated forming die |
| WO2015188546A1 (en) * | 2014-06-13 | 2015-12-17 | 浙江巨科实业股份有限公司 | Method for manufacturing aluminium alloy wheel hub |
| CN105215238A (en) * | 2015-09-17 | 2016-01-06 | 苏州新协力特种工业模板有限公司 | A kind of wheel pendulum rolles over apparatus for shaping |
| CN106166595A (en) * | 2016-03-16 | 2016-11-30 | 上海运良锻压机床有限公司 | Aluminium alloy wheel hub of vehicle forging rotation method |
| CN108237193A (en) * | 2018-01-09 | 2018-07-03 | 吉林大学 | Train wheel rotary roll method |
| CN108339913A (en) * | 2018-02-06 | 2018-07-31 | 无锡南理工科技发展有限公司 | A kind of forging method of metallurgy mine tram wheel |
| CN208613645U (en) * | 2018-06-28 | 2019-03-19 | 浙江跃岭股份有限公司 | A kind of rotary forging machine of aluminium alloy wheel hub |
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| CN114473370A (en) * | 2021-12-15 | 2022-05-13 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
| CN114473370B (en) * | 2021-12-15 | 2023-06-09 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
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