CN110871229B - Spinning process for automobile aluminum alloy hub - Google Patents
Spinning process for automobile aluminum alloy hub Download PDFInfo
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- CN110871229B CN110871229B CN201911072316.0A CN201911072316A CN110871229B CN 110871229 B CN110871229 B CN 110871229B CN 201911072316 A CN201911072316 A CN 201911072316A CN 110871229 B CN110871229 B CN 110871229B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/30—Making other particular articles wheels or the like wheel rims
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a spinning process of an automobile aluminum alloy hub, which comprises the following steps: heating a spinning die to enable the temperature of the spinning die to reach 270-290 ℃, spraying a release agent on the surface of the spinning die, taking out an aluminum alloy hub blank from a casting die, and directly putting the aluminum alloy hub blank into a heating furnace to continue heating until the temperature reaches 355-375 ℃; secondly, grabbing an aluminum alloy hub blank from the heating furnace by using a manipulator, placing the aluminum alloy hub blank on a spinning die, and controlling an upper tail top tool above the spinning die to move downwards to clamp the aluminum alloy hub blank together with the spinning die; thirdly, spinning the aluminum alloy hub blank by a spinning cutter; and (IV) controlling the upper tail jacking tool to ascend to an original point, and jacking the spinning blank which is subjected to spinning processing by the jacking device upwards to enable the spinning blank to be separated from the spinning die. The invention has short production period, can effectively ensure the processing precision and quality of products and saves energy consumption.
Description
Technical Field
The invention relates to the field of aluminum alloy hub manufacturing, in particular to a spinning process of an automobile aluminum alloy hub.
Background
Along with the rapid development of the automobile industry, people have higher and higher requirements on the design diversification and the mechanical property of the automobile hub, and the aluminum alloy spinning hub is widely applied due to better density and rigidity, light weight and more durability. However, the traditional spinning process has the defects of multiple process links, long processing period and high processing cost, is only suitable for certain high-end car markets, and cannot be widely applied to middle and low-end automobile markets. The traditional automobile aluminum alloy cast rotary wheel hub comprises the following processing technology: casting, sprue removal, flash removal, center hole turning, heating, spinning, heat treatment, machining, coating protection and the like. The aluminum alloy hub spinning process generally comprises the steps of positioning an aluminum alloy hub blank on a spinning die, then positioning and clamping the aluminum alloy hub blank on the spinning die by using a tail jacking tool I above the spinning die, and then spinning the aluminum alloy hub blank by using a spinning knife. The existing aluminum alloy hub structure is shown in figure 1, an aluminum alloy hub blank is positioned in an upper tail top tool I and a spinning die as shown in figure 2, wherein the upper tail top tool comprises an upper tail top I6, an upper tail top connecting column 7 and a connecting seat 8, the upper tail top I6 is used for compressing a spoke of the aluminum alloy hub blank 10, the upper tail top connecting column 7 is arranged on the upper tail top, and a central positioning rod 9 at the bottom end of the upper tail top connecting column 7 is downwards extended from a central through hole in the middle of the upper tail top to position a central hole in the middle of the aluminum alloy hub blank 10. A prior art aluminum alloy hub blank. The existing spinning process has the following defects: 1. the inner side of the rim of the aluminum alloy hub blank is not provided with a positioning end face, the aluminum alloy hub blank needs to be subjected to sprue removal, flash removal and center hole turning before the spinning process to ensure the spinning adaptation and positioning problems, the production period is long, the equipment and labor investment is large, and the production cost is high; 2. the aluminum alloy hub blank is greatly influenced by the processing precision of punching, deburring and center hole turning; 3. the aluminum alloy hub blank has a shorter rim, the included angle A1 between the outer wall of the rim and the horizontal line is 69 degrees, where the hub is an eighteen inch diameter automotive aluminium alloy hub rim (the following examples refer to this specification), the height H1 of the rim in the vertical direction is 87 mm, the rim tip thickness E1 (D2 =25.27 mm) is large and increases too fast, the rim tip thickness is large, the defect of insufficient spinning is easy to occur in the spinning processing process, the equipment is stressed unevenly in the spinning processing process due to the fact that the thickness is increased rapidly, an alarm is given due to the fact that a cutter is clamped due to overloading, the equipment is easy to damage, the thickness D1 of the root part of the rim is small and is usually only 9mm (the diameter is eighteen inches of the automobile aluminum alloy hub rim), strong downward pulling force exists in the spinning processing process, the rim is too thin and can be pulled to deform or break, and the aluminum water channel is too small due to the fact that the rim is too thin and is not beneficial to casting; 4. an aluminum alloy hub blank (the temperature is 260-290 ℃ usually) from a casting die needs to be cooled to normal temperature, and then the machining such as sprue removal, flash removal, center hole turning and the like can be carried out, while the aluminum alloy hub blank needs to be heated to 365 ℃ during spinning, so that a large amount of energy is consumed; 5. because the structure of the spinning die is not reasonable enough, only the workpiece is compressed by the tail top, the workpiece is not limited in the circumferential direction, the seam allowance of the aluminum alloy hub blank after spinning is large in deformation (the deformation is in the range of 0.3-1 mm), the subsequent machining precision is influenced, and then the spinning process needs to be carried out at high temperature, the aluminum alloy hub blank after spinning is hot, the gap between the central hole wall of the aluminum alloy hub blank and the central positioning rod is small, according to the principle of thermal expansion and cold contraction, when the tail top tool goes upwards in the machining process, the central positioning rod of the upper tail top connecting column can often bring the aluminum alloy hub blank, and the normal proceeding of production and the improvement of efficiency are influenced.
Disclosure of Invention
The invention aims to provide the automobile aluminum alloy hub spinning process aiming at the defects in the prior art, the production period is short, the processing precision and quality of products can be effectively ensured, and the energy consumption is saved.
The technical scheme adopted by the invention for realizing the purpose is as follows: the spinning process of the automobile aluminum alloy hub comprises the following steps: heating a spinning die to enable the temperature of the spinning die to reach 270-300 ℃, spraying a release agent on the surface of the spinning die, and meanwhile, directly putting an aluminum alloy hub blank taken out of a casting die into a heating furnace to continue heating until the temperature of the aluminum alloy hub blank reaches 355-375 ℃; secondly, grabbing an aluminum alloy hub blank from the heating furnace by using a manipulator, placing the aluminum alloy hub blank on a spinning die, and controlling an upper tail top tool above the spinning die to move downwards to clamp the aluminum alloy hub blank together with the spinning die; thirdly, spinning the aluminum alloy hub blank by a spinning cutter; and (IV) controlling the upper tail jacking tool to move upwards to the original point, and controlling a jacking device on the inner side of the spinning die to jack the spinning blank which is subjected to spinning processing upwards so as to separate the spinning blank from the spinning die.
The further technical scheme of the invention is as follows: in the step (I), the aluminum alloy hub blank comprises a spoke and a rim, a boss which is mutually abutted to and positioned by a spinning die is arranged on the inner side wall of the connecting end of the rim and the spoke in a protruding mode, the included angle between the outer side wall of the rim and the horizontal plane is 72-74 degrees, the thickness of the rim is gradually increased from the connecting end of the rim and the spoke to the end far away from the connecting end of the spoke, and the end part, far away from the spoke, of the rim is a.
The further technical scheme of the invention is as follows: the boss is formed by extending each spoke and the end part of the rim connecting end, the upper surface of the boss is a flat plane, the wall thickness of the rim connected with the spoke is the minimum, the minimum wall thickness of the rim is 11-14mm, the maximum wall thickness of the rim is positioned at the end part of the rim far away from one end of the spoke, and the maximum wall thickness of the rim is 18-22 mm.
The further technical scheme of the invention is as follows: the spinning die comprises a die core and a material ejector, the die core comprises a base connected with a connecting flange and a positioning die connected to the base, a step surface matched with an inner side boss of an aluminum alloy wheel hub blank for positioning is arranged on the periphery of the top end of the positioning die, a material ejector accommodating cavity for positioning the material ejector is arranged on the inner side of the positioning die, a through hole penetrating through the die core base is formed in the middle of the bottom end of the material ejector accommodating cavity, a push rod of a pushing mechanism is connected with the middle position of the bottom surface of the material ejector through the through hole, a limiting transmission rod is vertically connected to the surface of the bottom end of the material ejector close to the peripheral position, and a guide hole corresponding to the position of.
The further technical scheme of the invention is as follows: the lateral supporting surface of the positioning die close to the bottom end is directly connected with the horizontal supporting surface without a chamfer, the middle part of the bottom end of the die core base is upwards sunken to be provided with a stepped groove for mounting a connecting flange, and the stepped groove is communicated with the through hole.
The further technical scheme of the invention is as follows: and (IV) the tail jacking tool comprises a tail jacking II, a sprue sheath, a centering shaft sleeve and a spring, wherein the tail jacking II comprises an annular upper pressing plate, a stepped hole for installing and positioning the sprue sheath is formed in the middle of the upper pressing plate, the sprue sheath is positioned in the stepped hole of the tail jacking II, the upper end of the sprue sheath is fixedly connected with the centering shaft, a section of positioning flange is arranged on the outer edge surface of the centering shaft in a protruding mode, the centering shaft sleeve is sleeved outside the centering shaft, the bottom end of the centering shaft sleeve is fixedly connected with the peripheral surface of the upper end of the stepped hole of the tail jacking II, a through hole for the top end of the centering shaft to pass through is formed in the upper end of the centering shaft sleeve, the spring is sleeved on the outer surface of the centering shaft at the upper end of the positioning flange, the lower end of the.
The further technical scheme of the invention is as follows: the sprue sheath comprises a cylindrical main body part, a sheath top wall is connected to the inner side of the upper end of the main body part, an upward protruding positioning column is connected to the middle of the sheath top wall, a central hole communicated with an inner cavity of the main body part is formed in the middle of the positioning column, a through hole corresponding to the position of the central hole in the positioning column is formed in the axial center of the centering shaft, and the bottom end of the centering shaft is connected with the positioning column of the sprue.
The further technical scheme of the invention is as follows: the sprue sheath positioning column is characterized in that a connecting hole I penetrating through the top wall of the sheath is formed in the top wall of the sheath at the periphery of the sprue sheath positioning column, a positioning stepped hole equal to the outer diameter of the positioning column is formed in the bottom end of the centering shaft, a connecting hole II corresponding to the connecting hole I at the periphery of the sprue sheath positioning column in a one-to-one mode is formed in the end face of the bottom end of the centering shaft, and when the centering shaft is connected with the sprue sheath, a connecting bolt penetrates through the connecting hole I and the connecting hole II upwards.
The further technical scheme of the invention is as follows: the lower side of the main body part of the sprue sheath is of a conical structure with an outer side wall inclined inwards gradually, and the bottom end of the outer wall of the main body part is provided with a plurality of notches in an upwards sunken mode.
The further technical scheme of the invention is as follows: and a spigot limiting groove mutually positioned with the spoke outer edge protrusion of the hub is formed in the lower surface of the upper pressure plate of the upper tail top II close to the periphery of the outer side in an upwards sunken manner.
The spinning process of the automobile aluminum alloy hub has the following beneficial effects:
1. according to the invention, the aluminum alloy hub blank taken out of the casting die is slightly heated to reach the spinning requirement temperature, so that the aluminum alloy hub blank can be directly subjected to spinning processing, and the aluminum alloy hub blank taken out of the casting die is not required to be cooled to normal temperature and then subjected to machining such as sprue removal, flash removal and center hole turning, so that the intermediate processing links are reduced, the production period is shortened, the investment of equipment and labor is also reduced, and the production cost is effectively reduced; meanwhile, the temperature of the aluminum alloy hub blank taken out of the casting die is about 260-290 ℃, the temperature difference between the aluminum alloy hub blank and the spinning temperature is small, the aluminum alloy hub blank can be rapidly heated to the spinning temperature of about 360 ℃, and compared with the prior art, the aluminum alloy hub blank at the normal temperature after being machined is heated to the temperature required by spinning, a large amount of energy can be saved.
2. Through improving aluminum alloy wheel hub blank structure, the aluminum alloy wheel hub blank sets up the boss at rim and spoke link inside wall, the boss can lean on the location with the spinning mould each other, realize direct accurate location, need not carry out the spinning again after the aluminum alloy wheel hub blank processing locating surface that comes out to the casting, the aluminum alloy wheel hub blank does not cool off just can directly carry out spinning processing after the casting is accomplished, the contained angle of rim lateral wall and horizontal plane increases than prior art, make the height of rim uprise, guarantee sufficient spinning processing surplus, the problem that spinning does not target in place is difficult to appear, equipment atress is even in the spinning course of working, guarantee the stability of spinning quality, improve equipment's effective rate of utilization, the life of extension equipment, and then reduction in production cost.
3. The periphery of the top end of a mold core positioning mold is provided with a step surface which is matched and positioned with a boss on the inner side of an aluminum alloy hub blank, the aluminum alloy hub blank can be directly positioned on the positioning mold of a mold core for spinning processing, a positioning shaft is not arranged below a material ejector, the material ejector is changed into a whole from a split type, the whole weight of the equipment is effectively reduced, the material ejector is convenient to maintain and replace, the bottom end of the material ejector is provided with a limiting transmission rod, the mold core is provided with guide holes which correspond to each other in position, the material ejector and the mold core can well run synchronously, the quality of a product is ensured to be stable, the positioning mold is directly connected with a horizontal supporting surface without a chamfer angle close to the bottom end side, the included angle is slightly larger than 90 degrees, the spinning rolling pressing and force applying conduction at the position is facilitated, the chamfer angle of a processed spinning; the middle part of the bottom end of the mold core base is provided with a stepped groove for installing a connecting flange in an upward concave mode, a flange plate for connecting a machine table is sunk into the mold core, the whole weight of the mold is reduced, the whole mold and the flange are matched to play a role in reinforcing and limiting, the index of machining precision and safe operation is guaranteed, the total height of the mold is reduced, and different models, particularly products with larger sizes and higher rims can be machined conveniently.
4. A sprue sheath which is positioned opposite to the sprue in the middle of the aluminum alloy hub blank is arranged in the middle of the upper pressure plate of the upper tail top II, the sprue sheath is directly pressed on the sprue, the aluminum alloy hub blank can be directly subjected to spinning processing without a process of machining and turning a central hole, an intermediate processing link is omitted, and the production efficiency is effectively improved; a centering shaft is connected above the sprue sheath, a centering shaft sleeve and a spring are arranged outside the centering shaft, the spring is compressed when the sprue sheath is pressed on the sprue, and the sprue sheath can stably press the sprue all the time; when the upper tail jacking tool moves upwards, the sprue sheath can return downwards quickly under the action of the restoring force of the spring, a plurality of notches are formed in the bottom end of the outer wall of the main body part of the sprue sheath, the sprue sheath is not easy to stick a sprue, a hub cannot be brought upwards, and the field production cannot be influenced; a rabbet limiting groove is arranged below an upper pressure plate of the upper tail jack II, so that the dimensional change of a product can be controlled more conveniently, and the dimensional deformation is proved to be within 0.3mm through practice; and the tail top mounting tool is simpler, more practical and more economical.
The spinning process of the aluminum alloy hub of the automobile is further described with reference to the accompanying drawings and the embodiment.
Drawings
FIG. 1 is a schematic structural view of a prior art aluminum alloy hub blank;
FIG. 2 is a schematic view of a prior art aluminum alloy hub blank positioned in an upper tail cap tooling and spinning die;
FIG. 3 is a schematic structural view of an aluminum alloy hub blank processed by the automobile aluminum alloy hub spinning process of the present invention;
FIG. 4 is a schematic structural diagram of a spinning die used in the automobile aluminum alloy hub spinning process of the present invention;
FIG. 5 is a schematic structural view of an upper tail cap tooling used in the automobile aluminum alloy hub spinning process of the present invention;
FIG. 6 is a schematic view of the sprue bushing of the top tail tooling of FIG. 5;
FIG. 7 is a schematic structural view of a centering sleeve of the upper tail cap tooling shown in FIG. 5;
FIG. 8 is a schematic structural view of a centering shaft of the upper tail cap tooling shown in FIG. 5;
FIG. 9 is a schematic structural view of an aluminum alloy hub blank of the automotive aluminum alloy hub spinning process of the present invention positioned in an upper tail cap tooling and a spinning die;
the reference numbers illustrate: 1-spinning die, 2-connecting flange, 3-positioning shaft, 4-ejector, 5-positioning sleeve, 6-upper tail top I, 7-upper tail top connecting column, 8-connecting seat, 9-central positioning rod, 10-aluminum alloy hub blank, 11-spoke, 12-rim, 13-rim end, 14-boss, 15-spoke inner reinforcing rib, 16-sprue, 17-horizontal supporting surface, 18-lateral supporting surface, 19-positioning die, 20-step surface, 21-step groove, 22-limiting transmission rod, 23-guiding hole, 24-base, 25-centering shaft sleeve, 26-centering shaft, 27-upper protecting cover, 28-spring, 29-upper tail top II, 30-upper pressing plate, 31-stepped hole, 32-sprue sheath, 33-spigot limiting groove, 34-notch, 35-connecting hole I, 36-positioning column, 37-central hole, 38-main body part, 39-flange type boss, 40-connecting hole IV, 41-connecting hole III, 42-positioning flange, 43-connecting hole II, 44-spinning knife, 45-machine table, 46-spoke outer edge protrusion, and 47-spinning blank.
Detailed Description
As shown in fig. 3 to 9, the spinning process of the automobile aluminum alloy hub comprises the following steps: heating a spinning die 1 to enable the temperature of the spinning die 1 to reach 270-290 ℃, spraying a release agent on the surface of the spinning die 1, simultaneously, taking out an aluminum alloy hub blank 10 from a casting die, directly putting the aluminum alloy hub blank 10 into a heating furnace for continuous heating, taking out the aluminum alloy hub blank 10 from the casting die, enabling the temperature of the aluminum alloy hub blank 10 to be about 260-290 ℃, directly putting the hot (about 260-290 ℃) aluminum alloy hub blank 10 into the heating furnace for continuous heating until the temperature of the aluminum alloy hub blank reaches 355-375 ℃; secondly, grabbing the aluminum alloy hub blank 10 coming out of the heating furnace by using a manipulator, placing the aluminum alloy hub blank 10 on a spinning die 1, and controlling an upper tail top tool above the spinning die 1 to move downwards to clamp the aluminum alloy hub blank 10 together with the spinning die 1; thirdly, spinning the aluminum alloy hub blank 10 by a spinning cutter 44; and (IV) controlling the upper tail jacking tool to move upwards to the original point, and controlling the ejector 4 on the inner side of the spinning die 1 to jack the spinning blank 47 which is subjected to spinning processing upwards, so that the spinning blank 47 is separated from the spinning die 1.
As shown in fig. 3, in the step (a), the aluminum alloy hub blank 10 includes the spokes 11 and the rim 12, wherein the inner side wall of the connecting end of the rim 12 and the spokes 11 is protruded with a boss 14 positioned against the spinning die 1, the boss 14 is formed by extending upward the connecting end of each spoke 11 and the rim 12, and the upper surface of the boss 14 is a flat plane. The boss 14 is beneficial to positioning the spinning process and the spinning die 1, machining is not needed before the spinning process, and the trouble caused by the process that the window flash needs to be machined to remove the flash can be well solved. The included angle between the outer side wall of the rim 12 and the horizontal plane is 72-74 degrees, taking an automobile aluminum alloy hub with the diameter of eighteen inches as an example, the included angle A2 between the outer side wall of the rim 12 and the horizontal plane is 73 degrees. The angle between the outer side wall of the rim 12 and the horizontal plane is increased, so that the height of the rim 12 in the vertical direction is higher, and taking an automobile aluminum alloy hub with the diameter of eighteen inches as an example, the height H2 of the rim 12 in the vertical direction is 116 mm. The thickness of the rim 12 is gradually increased from the connecting end with the spoke 11 to the end far away from the connecting end of the spoke 11, the wall thickness of the rim 12 is optimized to be increased in a gradient manner, so that the stress of the spinning cutter 44 is uniform, the spinning quality is guaranteed, the phenomenon that equipment is stressed unevenly in the spinning processing process, overload occurs, the cutter is blocked and an alarm is given, the equipment is easily damaged, and the adequate spinning processing allowance can be guaranteed by properly increasing the height of the rim 12. The wall thickness of the rim 12 at the connecting end of the spoke 11 is the minimum, the minimum wall thickness of the rim 12 is 11-14mm, and taking an automobile aluminum alloy hub with the diameter of eighteen inches as an example, the minimum wall thickness D2 of the rim 12 at the connecting end of the rim 12 and the spoke 11 is 12 mm. The wall thickness here is the obvious increase of prior art, can prevent that the spinning course of working from having powerful decurrent pulling force, and arouse this department by tensile deformation or fracture, can increase the passageway of aluminium water when adopting this structure casting, lets the mould cavity that the aluminium water is full of the casting mould faster, can improve production efficiency. The position of the maximum wall thickness of the rim 12 is located at the end of the rim 12 remote from the disc 11, and the maximum wall thickness of the rim 12 is 18-22 mm. Taking an automobile aluminum alloy hub with the diameter of eighteen inches as an example, the maximum wall thickness E2 of the rim 12 is 19 +/-3 mm. The end 13 of the rim 12 far away from the spoke 11 is a flat plane, the inner side surface of the rim 12 connected with the end surface is also a plane, and the angle is close to a right angle. By adopting the design, the defect that the spinning is not in place in the spinning processing process is avoided, the spinning processing is smoother, and the product quality is ensured.
As shown in fig. 4, in step (a), the spinning die 1 includes a die core and an ejector 4. Wherein the mold core comprises a base 24 connected with the connecting flange 2 and a positioning mold 19 connected on the base 24. The periphery of the top end of the positioning die 19 is provided with a step surface 20 which is matched and positioned with the boss 14 on the inner side of the aluminum alloy hub blank 10. In this embodiment, the positioning die 19 is provided with two step surfaces 20 at the top periphery, wherein one step surface 20 is positioned in cooperation with the inner side boss 14 of the aluminum alloy hub blank 10, and the other step surface 20 is positioned in cooperation with the inner side reinforcing rib 15 at the upper end of the inner side boss 14 of the aluminum alloy hub blank 10. The inner side of the positioning die 19 is provided with a material ejector 4 accommodating cavity for positioning the material ejector 4, the middle part of the bottom end of the material ejector 4 accommodating cavity is provided with a through hole penetrating through a die core base 24, and a push rod of the pushing mechanism is connected with the middle position of the bottom surface of the material ejector 4 through the through hole. The bottom end surface of the ejector 4 is vertically connected with a limit transmission rod 22 near the periphery, and the bottom end surface of the accommodating cavity of the ejector 4 of the mold core is provided with a guide hole 23 corresponding to the position of the limit transmission rod 22. The side direction supporting surface 18 that the location mould 19 leaned on the bottom does not establish the lug connection of chamfer with horizontal supporting surface 17, the side direction supporting surface 18 that the location mould 19 leaned on the bottom is 91 to 95 degrees with the contained angle between horizontal supporting surface 17, in this embodiment, the side direction supporting surface 18 that the location mould 19 leaned on the bottom is 93 degrees with the contained angle between horizontal supporting surface 17, do benefit to the conduction that rolls down and exert force at this place at the spinning in-process, make the spin base that processes out can reduce at the rim chamfer, the phenomenon that the car is not smooth here of having solved the follow-up processing. The middle part of the bottom end of the mold core base 24 is upwards sunken to be provided with a stepped groove 21 for mounting the connecting flange 2, and the stepped groove 21 is communicated with the through hole.
As shown in fig. 5 to 8, in the step (four), the upper tail top tool includes an upper tail top ii 29, a gate sheath 32, a centering shaft 26, a centering shaft sleeve 25, and a spring 28. The upper tail jack II 29 comprises an annular upper pressure plate 30, a stepped hole 31 for installing and positioning a sprue sheath 32 is formed in the middle of the upper pressure plate 30, and the sprue sheath 32 is positioned in the stepped hole 31 of the upper tail jack II 29. And a rabbet limiting groove 33 which is mutually positioned with the spoke outer edge bulge 46 of the hub is formed in the lower surface of the upper pressure plate 30 close to the outer periphery of the upper tail top II 29 in an upward concave manner. The sprue sheath 32 comprises a cylindrical main body part 38, a sheath top wall is connected to the inner side of the upper end of the main body part 38, an upward protruding positioning column 36 is connected to the middle of the sheath top wall, a central hole 37 communicated with the inner cavity of the main body part 38 is formed in the middle of the positioning column 36, the central hole 37 is formed in the middle of the positioning column 36, ventilation is facilitated, and the sprue sheath 32 can be effectively prevented from bringing the aluminum alloy hub blank 10 expanded due to high temperature. The main part 38 downside of runner sheath 32 is the toper structure of lateral wall leanin gradually, and the main part 38 outer wall bottom upwards caves in and is equipped with a plurality of breachs 34, sets up breach 34 when aluminum alloy hub blank 10 because of high temperature expansion, breach 34 can fully hold the expanded surplus, and avoids aluminum alloy hub blank 10 runner 16 position expansion card at runner sheath 32 inner chamber, and then upwards takes up aluminum alloy hub blank 10 when avoiding last tail top frock to go up.
The outer peripheral surface of the centering shaft 26 is provided with a positioning flange 42 in a protruding manner, and the axial center of the centering shaft 26 is provided with a through hole corresponding to the position of the central hole 37 on the positioning column 36. The upper end of the gate boot 32 is fixedly connected to the centering shaft 26, and the bottom end of the centering shaft 26 is interconnected to the positioning post 36 of the gate boot 32. In this embodiment, a connecting hole i 35 penetrating through the top wall of the protective sleeve is arranged on the top wall of the protective sleeve at the periphery of the positioning column 36 of the gate protective sleeve 32, a positioning stepped hole 31 having the same outer diameter as the positioning column 36 is arranged at the bottom end of the centering shaft 26, a connecting hole ii 43 corresponding to the position of the connecting hole i 35 at the periphery of the positioning column 36 of the gate protective sleeve 32 is arranged on the bottom end surface of the centering shaft 26, and when the centering shaft 26 is connected with the gate protective sleeve 32, a connecting bolt penetrates the connecting hole i 35 and the connecting hole ii 43 from the bottom surface of the top wall of the protective. The whole centering shaft sleeve 25 is of a cylindrical structure, a flange type boss 39 connected with the upper side surface of the upper tail top II 29 is arranged at the bottom end of the centering shaft sleeve 25 in a protruding mode, and a connecting hole III 41 is formed in the flange type boss 39. The centering shaft sleeve 25 is sleeved outside the centering shaft 26, and the bottom end of the centering shaft sleeve 25 is fixedly connected with the peripheral surface of the upper end of the stepped hole 31 of the upper tail top II 29. The middle part of the upper end of the centering shaft sleeve 25 is provided with a through hole for the top end of the centering shaft 26 to pass through, and the top surface of the centering shaft sleeve 25 is provided with a connecting hole IV 40 which is mutually connected with the upper protecting cover 27. The spring 28 is sleeved on the outer surface of the centering shaft 26 at the upper end of the positioning flange 42 of the centering shaft 26, the lower end of the spring 28 is abutted against the upper surface of the positioning flange 42, and the upper end of the spring 28 is abutted against the lower surface of the top wall of the centering shaft sleeve 25. The top end of the centering shaft sleeve 25 is also connected with an upper protecting cover 27 covering the upper end of the centering shaft 26, and the upper protecting cover 27 is arranged to prevent dust and sundries from entering the inner side of the centering shaft sleeve 25 from the through hole at the upper end of the centering shaft sleeve 25 to influence the up-and-down movement of the centering shaft 26.
The above embodiments are merely preferred embodiments of the present invention, which is not limited to the above embodiments, and any modifications, equivalents and the like, which are within the spirit and principle of the present invention, should be included in the protection scope of the present invention.
Claims (8)
1. The spinning process of the automobile aluminum alloy hub is characterized by comprising the following steps of: heating the spinning die (1) to enable the temperature of the spinning die to reach 270-290 ℃, spraying a release agent on the surface of the spinning die (1), and simultaneously directly putting an aluminum alloy hub blank (10) taken out of a casting die into a heating furnace to continue heating until the temperature of the aluminum alloy hub blank reaches 355-375 ℃; secondly, grabbing an aluminum alloy hub blank (10) coming out of the heating furnace by using a manipulator, placing the aluminum alloy hub blank (10) on a spinning die (1), and controlling an upper tail jacking tool above the spinning die (1) to move downwards to clamp the aluminum alloy hub blank (10) together with the spinning die (1); thirdly, spinning the aluminum alloy hub blank (10) by a spinning cutter; fourthly, controlling the tail jacking tool to ascend to the original point, and controlling a material ejector (4) on the inner side of the spinning die (1) to jack the spinning blank which is subjected to spinning processing upwards so as to separate the spinning blank from the spinning die (1); in the step (IV), the tail top loading tool comprises a tail top loading II (29), a gate sheath (32), a centering shaft (26), a centering shaft sleeve (25) and a spring (28), the tail top loading II (29) comprises a circular upper pressure plate (30), a step hole (31) for installing and positioning the gate sheath (32) is formed in the middle of the upper pressure plate (30), the gate sheath (32) is positioned in the step hole (31) of the tail top loading II (29), the upper end of the gate sheath (32) is fixedly connected with the centering shaft (26), a section of positioning flange (42) is arranged on the surface of the outer edge of the centering shaft (26) in a protruding mode, the centering shaft sleeve (25) is sleeved outside the centering shaft (26), the bottom end of the centering shaft sleeve (25) is fixedly connected with the peripheral surface of the upper end of the step hole (31) of the tail top loading II (29), a through hole for the top end of the centering shaft (26) to penetrate through is formed in the upper end of the centering shaft sleeve (25), and the spring (28) is sleeved on the, the lower end of the spring (28) abuts against the upper surface of the positioning flange (42), and the upper end of the spring (28) abuts against the lower surface of the top wall of the centering shaft sleeve (25); the sprue sheath (32) comprises a cylindrical main body part (38), a sheath top wall is connected to the inner side of the upper end of the main body part (38), an upward protruding positioning column (36) is connected to the middle of the sheath top wall, a central hole (37) communicated with an inner cavity of the main body part (38) is formed in the middle of the positioning column (36), a through hole corresponding to the position of the central hole (37) in the positioning column (36) is formed in the axial center of the centering shaft (26), and the bottom end of the centering shaft (26) is connected with the positioning column (36) of the sprue sheath (32).
2. The spinning process of the automobile aluminum alloy hub as claimed in claim 1, wherein in the step (one), the aluminum alloy hub blank (10) comprises a spoke (11) and a rim (12), a boss (14) which is mutually abutted and positioned with the spinning die (1) is arranged on the inner side wall of the connecting end of the rim (12) and the spoke (11) in a protruding mode, the included angle between the outer side wall of the rim (12) and the horizontal plane is 72-74 degrees, the thickness of the rim (12) is gradually increased from the connecting end of the rim (11) to the end far away from the connecting end of the spoke (11), and the rim end (13) of the rim (12) far away from the end of the spoke (11) is a flat plane.
3. A spinning process of an automobile aluminum alloy hub as claimed in claim 2, wherein the boss (14) is formed by extending each spoke (11) and the end part of the connecting end of the rim (12), the upper surface of the boss (14) is a flat plane, the wall thickness of the rim (12) at the connecting end of the spoke (11) is the smallest, the minimum wall thickness of the rim (12) is 11-14mm, the position of the maximum wall thickness of the rim (12) is located at the end part of the rim (12) far away from the spoke (11), and the maximum wall thickness of the rim (12) is 18-22 mm.
4. The spinning process of the automobile aluminum alloy hub as claimed in claim 1, wherein in the step (one), the spinning die (1) comprises a die core and a material ejector (4), the die core comprises a base (24) connected with the connecting flange (2) and a positioning die (19) connected to the base (24), the periphery of the top end of the positioning die (19) is provided with a step surface (20) which is matched and positioned with the boss (14) on the inner side of the aluminum alloy hub blank (10), the inner side of the positioning die (19) is provided with a material ejector accommodating cavity for positioning the material ejector (4), the middle of the bottom end of the material ejector accommodating cavity is provided with a through hole penetrating through the die core base (24), a push rod of the pushing mechanism is connected with the middle position of the bottom surface of the material ejector (4) through the through hole, the surface of the bottom end of the material ejector (4) is vertically connected with a limiting transmission rod (22) by the peripheral position, and the end surface of the bottom.
5. The spinning process of the automobile aluminum alloy hub as claimed in claim 4, wherein the lateral supporting surface (18) close to the bottom end of the positioning die (19) is directly connected with the horizontal supporting surface (17) without a chamfer, the middle part of the bottom end of the die core base (24) is upwards sunken to be provided with a stepped groove (21) for mounting the connecting flange (2), and the stepped groove (21) is communicated with the through hole.
6. The automobile aluminum alloy hub spinning process according to claim 1, wherein a connecting hole I (35) penetrating through the top wall of the sheath is formed in the top wall of the sheath at the periphery of a positioning column (36) of the sprue sheath (32), a positioning stepped hole (31) with the same outer diameter as that of the positioning column (36) is formed in the bottom end of the centering shaft (26), connecting holes II (43) corresponding to the positions of the connecting holes I (35) in the periphery of the positioning column (36) of the sprue sheath (32) one by one are formed in the end face of the bottom end of the centering shaft (26), and when the centering shaft (26) is connected with the sprue sheath (32), connecting bolts respectively penetrate through the connecting holes I (35) and the connecting holes II (43) upwards from the bottom surface of the top wall of the sheath to connect the sprue sheath.
7. The automobile aluminum alloy hub spinning process of claim 1, wherein the lower side of the main body part (38) of the sprue sheath (32) is of a conical structure with the outer side wall gradually inclined inwards, and the bottom end of the outer wall of the main body part (38) is recessed upwards to form a plurality of notches (34).
8. The spinning process of the automobile aluminum alloy hub as claimed in claim 1, wherein a rabbet limiting groove (33) which is mutually positioned with the spoke outer edge bulge (46) of the hub is formed in a concave manner on the periphery of the outer side of the lower surface of the upper pressure plate (30) of the upper tail top II (29).
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| CN201911072316.0A CN110871229B (en) | 2019-11-05 | 2019-11-05 | Spinning process for automobile aluminum alloy hub |
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| CN201911072316.0A CN110871229B (en) | 2019-11-05 | 2019-11-05 | Spinning process for automobile aluminum alloy hub |
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| CN110871229B true CN110871229B (en) | 2021-03-23 |
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| CN117549013B (en) * | 2024-01-10 | 2024-03-26 | 江苏凯特汽车部件有限公司 | New energy automobile aluminum wheel casting spinning manufacturing method |
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Denomination of invention: Spinning process of automobile aluminum alloy wheel hub Effective date of registration: 20230306 Granted publication date: 20210323 Pledgee: China Construction Bank Corporation Liuzhou Branch Pledgor: Liuzhou Yiyang Science and Technology Co.,Ltd. Registration number: Y2023450000029 |