CN102179664A - Combined plastic forming method of automobile hub and matching forming mold of automobile hub - Google Patents
Combined plastic forming method of automobile hub and matching forming mold of automobile hub Download PDFInfo
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- CN102179664A CN102179664A CN2011100241574A CN201110024157A CN102179664A CN 102179664 A CN102179664 A CN 102179664A CN 2011100241574 A CN2011100241574 A CN 2011100241574A CN 201110024157 A CN201110024157 A CN 201110024157A CN 102179664 A CN102179664 A CN 102179664A
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Abstract
The invention discloses a combined plastic forming method of an automobile hub and a matching forming mold of the automobile hub. The method comprises the following steps of: 1, forming the automobile hub by using light-alloy blanks through a set of forming mold at two steps under the condition of constant temperature, wherein the forming mold is provided with a split lower mold, two upper extrusion male molds and two upper bulging male molds, and the upper extrusion male molds and the upper bulging male molds are sequentially matched with the split lower mold; 2, matching the blanks in the mold by using the upper extrusion male molds and the upper bulging male molds during forming; 3, pre-forming a spoke part of the hub and the lower part of a rim by adopting an extrusion process; 4, forming the upper part of the rim into a hollow pipe blank; and 5, matching the upper bulging male molds with the lower mold and forming a pre-formed part formed in the step 1 into the hub through the extrusion process. Equipment disclosed by the invention has a simple structure, the deformation resistance of each-step process is lower, the mold size and the equipment tonnage are effectively reduced, the production efficiency is improved, and the production cost is lowered.
Description
Technical field
The invention belongs to light-alloy plastic forming technology field, the combination forming method of particularly a kind of aluminium alloy or magnesium alloy auto hub or disk-shaped part and supporting shaping dies thereof.
Background technology
Auto industry develops extremely rapid as mainstay of the national economy industry.How to limit energy usage, improve energy utilization rate, reduce discharge amount of exhaust gas, particularly important to preserving the ecological environment with people's living environment.A way the most effective saving oil consumption is to alleviate automotive dead weight, and automotive wheel is as the basic load bearing component of vehicle operating, and its performance quality will directly influence driving safety, energy consumption and the presentation quality of vehicle.
Present automobile disc wheel of light metal alloy mainly is aluminium alloy wheel hub and magnesium alloy hub.The aluminum-alloy wheel wheel hub has light weight, anticorrosion, characteristics such as thermal conductivity is good, can reduce the temperature in the tire use, improve its service life, and the forming technology of aluminium alloy is also relatively good, in the Hyundai Motor manufacturing, is just replacing traditional steel wheel and applied widely.The density of magnesium alloy materials is low, specific strength and specific stiffness be all than higher, and has higher vibration damping and impact resistance, is fit to very much the service condition of wheel.Adopt magnesium alloy to make lightweight, raising fuel efficiency and the minimizing CO of hub for vehicle wheel to vehicle
2Discharge capacity all significant, be the development trend of car wheel.
The manufacturing process of aluminium alloy or magnesium alloy auto hub mainly is divided into two kinds of cast form and Plastic Forming.Because the mechanical property of cast article is lower, have certain limitation, thereby plastic molding method is mainly adopted in the production of aluminum current alloy or magnesium alloy auto hub.
The patent No. is building mortion and the manufacturing process thereof that the Chinese invention patent specification of ZL200510010214.8 discloses a kind of solid hot extrusion magnesium alloy wheel hub, this method adopts an extrusion molding magnesium alloy hub, operation is few, but thereby its deformation extent causes extrusion pressure big greatly, when hub size is big, die size is just very big, needs equipment tonnage also very big, causes cost to improve.
The patent No. is that the Chinese invention patent specification of ZL200610012829.9 discloses a kind of labor-saving automobile hub forming method and device, its technical process is that casting ingot-homogenising processing-preform base-backward extrusion-pier squeezes front wheel felloe-enlarging rear rim-finishing procedure, it is in order to reduce plastic force that this method adopts the purpose of multiple working procedure, but its operation is too complicated, backward extrusion wherein, pier squeezes front wheel felloe and enlarging rear rim operation need be used independently mould respectively, every mold all needs to dispose corresponding operating personnel, it is more to make that its equipment drops into, personnel demand is bigger, and in the process of extruding the extruding force that reduces each mould, avoid taking place chill crack, need heater be installed all on every mold and carry out independent heat tracing, cause the power consumption of its a whole set of building mortion bigger, use cost increases; Particularly manufacturing of wheel hub need be pushed respectively and the demoulding through three molds successively, in the demoulding and replacing mold process, can produce distortion because wheel hub is in the hot mastication state, increase the difficulty of following process, production efficiency is lower, and the cost that causes Plastic Forming is far above casting, and general car also is difficult to bear, only limit to the small lot batch manufacture of some specific use wheels at present, as on racing car and high-grade car, using.
Summary of the invention
An object of the present invention is: provide a kind of combination plastic molding method of automotive hub, many, the problems such as production efficiency is low, equipment tonnage is big, die size is big, production cost height of production process that exist with the plastic molding method that solves automotive hub in the prior art.
For achieving the above object, the technical scheme of the combination plastic molding method of automotive hub of the present invention is: a kind of combination plastic molding method of automotive hub, this method with the light-alloy blank under isothermy, adopt a cover shaping dies to be shaped in two steps, this shaping dies have a box-like counterdie of lobe and with the box-like counterdie of this lobe extruding of corresponding matching successively on punch on punch and the bulging, be provided with by lobe in the box-like counterdie of described lobe and close die, the die cavity that lower punch and backing-out punch surround, the first step is earlier put into the light-alloy blank die cavity and is gone up punch and the box-like counterdie of lobe by extruding and cooperate and adopt the extrusion process preform to go out the spoke outer surface profile of wheel hub and the substructure of wheel rim during shaping, and simultaneously clout is pre-formed into the hollow tube blank structure, the overall structure of spoke thereby the spoke inner surface profile that second step cooperated the performing member extrusion molding that first step extrusion molding is gone out to go out wheel hub with punch on the bulging and the box-like counterdie of this lobe again is shaped, the hollow tube blank structure that first step preform is gone out by bulging process is configured as the superstructure of wheel rim simultaneously, make the smart base of wheel hub, promptly become the wheel hub product through a small amount of machining and surface treatment again.
Described blank is that as cast condition or extruding attitude blank are processed the biscuit that obtains, and its effect after the homogenising solution treatment is better.
It is 350 ℃ to 420 ℃ that described magnesium alloy blank is shaped temperature required, and it is 400 ℃ to 480 ℃ that described aluminum alloy blank is shaped temperature required.
The temperature of described shaping dies is consistent with the forming temperature of blank.
The inner surface of the spoke part that described first step preform goes out is the plane.
Simultaneously, the present invention also provides the Plastic Forming mould that forms a complete set of that is used to implement above-mentioned manufacturing process, many, the problems such as production efficiency is low, equipment tonnage is big, die size is big, production cost height of production process that exist with the Plastic Forming mould that solves automotive hub in the prior art.
The technical scheme of a kind of complete assembling die wherein is: a kind of complete assembling die, comprise a box-like counterdie of lobe and two successively with the extruding of the box-like counterdie corresponding matching of this lobe on punch on punch and the bulging, the box-like counterdie of described lobe comprises by lobe and closes the die cavity that backing-out punch that die and lower punch and slip be plugged in the lower punch center surrounds, it is identical to close the outer surface profile of die internal face that surrounds and the wheel hub top wheel rim that will be shaped by lobe in the die cavity, the common upper surface that constitutes of lower punch and backing-out punch coincide with the spoke outer surface profile of the wheel hub that will be shaped, the junction that lower punch and lobe close die is provided with the annular groove that coincide with the wheel rim substructure that will be shaped, described lobe closes die to be made up of plural recessed model petal block, is connected with folding mould driving mechanism respectively on described each recessed model petal block; The minimum diameter of the outer peripheral face of punch and die cavity is partly formed the backward extrusion work zone that is used for preform hollow tube blank structure in the described extruding; The outer peripheral face of punch bottom is provided with the surface texture that coincide with the inner surface profile of the wheel hub top wheel rim that will be shaped on the described bulging, and its bottom shape coincide with the spoke inner surface profile of the wheel hub that will be shaped.
Comprise that also support and connection close the backing plate of die and lower punch bottom at lobe, described lower punch is flush-mounted in the center of this backing plate upper surface, the bottom surface that described lobe closes each recessed model petal block of die closely contacts cooperation with the upper surface of backing plate, described backing-out punch by the step surface that axially is provided with down on the side face by the backing plate axial limiting.
Described each recessed model petal block is set with a die sleeve outward, each recessed model petal block is retrained by this die sleeve and is slidingly matched by inclined ramp and die sleeve, described folding mould driving mechanism comprises that correspondence is arranged at the little push rod of each recessed model petal block bottom, each little push rod endwisely slips and is installed in the unthreaded hole that the backing plate correspondence offers, the top jacking of each little push rod is connected with top board in the bottom of each little push rod by big push rod jacking in the bottom of the recessed model petal block of correspondence.
The bottom of described backing-out punch is axially extended the upper surface near top board down, is installed with spacing between the bottom surface of backing-out punch and the upper surface of top board.
Go back jacking in the bottom of described die sleeve and backing plate and be connected with die shoe.
Also comprise the vertical pin that corresponding each recessed model petal block axially is provided with, axially offer pin-and-hole with corresponding respectively each vertical pin in the joint portion of each recessed model petal block at described die sleeve.
A kind of technical scheme that makes up punch wherein is: punch in a kind of combination, comprise pushing and go up punch on punch and the bulging, punch is a cylindrical structure in the described extruding, the bottom surface is the plane, and its diameter quite and with the minimum diameter of die cavity is partly formed the backward extrusion work zone with the minimum diameter in the die cavity that is used for corresponding matching; Punch also is a cylindrical structure on the described bulging, and the outer peripheral face shape of its underpart is coincide with the inner surface profile of the wheel hub top wheel rim that will be shaped, and its bottom shape coincide with the spoke inner surface profile of the wheel hub that will be shaped.
A kind of technical scheme of pushing punch wherein is: punch in a kind of extruding, it is cylindrical structure that punch is gone up in this extruding, the bottom surface is the plane, and its diameter quite and with the minimum diameter of die cavity is partly formed the backward extrusion work zone with the minimum diameter in the die cavity that is used for corresponding matching.
The present invention compared with prior art has the following advantages:
1) Plastic Forming of automotive hub only needs can finish in two steps with a cover shaping dies, thereby can obviously reduce the equipment and mold input, reduces the production cost of wheel hub;
2) adopt a mold production, reduced of the heating of existing each inter process, reduced energy consumption, thereby further reduced the manufacturing cost of wheel hub each mould;
3) adopt a mold to be shaped in two steps, make that the forming pressure in each step is very little, thereby can reduce equipment tonnage, reduce die size, make production cost further descend;
4) adopt a mold to be shaped in two steps, reduced the needed manpower and materials of Mould operation, further reduced production cost;
5) adopt a mold to be shaped in two steps, it carries out at a mold to finally making wheel hub all the time from putting into blank, performing member needs the more process of mold exchange in the prior art when carrying out next step thereby reduced, and has shortened the manufacturing time of wheel hub, has improved the manufacturing efficient of wheel hub;
6) adopt isothermal extrusion technology to make the even refinement of metal structure, product size precision and surface accuracy height are easy to be shaped, and the stock utilization height has improved the mechanical property of product simultaneously; 7) shaping dies of the present invention is simple in structure, and the automaticity height is easy to operate, can be on the basis of existing mold promptly can be made into through less improvement, thereby reduce the manufacturing cost of equipment, has further reduced the input of equipment.
Description of drawings
Fig. 1 is the process chart of the combination plastic molding method of automotive hub of the present invention;
Fig. 2 is the structural representation of the box-like counterdie specific embodiment of mesopetalum of the present invention;
Fig. 3 closes the vertical view of die for Fig. 2 mesopetalum;
Fig. 4 is the structural representation of extruding epirelief mold embodiment among the present invention;
Fig. 5 is the structural representation of bulging epirelief mold embodiment among the present invention;
Fig. 6 is that the working state schematic representation that punch cooperates with the box-like counterdie of lobe is gone up in extruding in the first step of the embodiment of the invention one;
Fig. 7 is the working state schematic representation that punch cooperated with the box-like counterdie of lobe on the bulging during second of the embodiment of the invention one went on foot;
Fig. 8 is the demoulding view of shaping dies among the present invention;
Fig. 9 is the structural representation of the box-like counterdie embodiment two of mesopetalum of the present invention.
The specific embodiment
The combination plastic molding method of automotive hub of the present invention such as Fig. 1, Fig. 5, shown in Figure 6, among Fig. 1, Fig. 1 a is a biscuit, Fig. 1 b goes up punch cooperates extrusion molding to constitute with the box-like counterdie of lobe performing member structure for extruding, Fig. 1 c is that punch cooperates the smart blank structure of the wheel hub that is shaped on the bulging with the box-like counterdie of lobe, its mainly be with light-alloy blanks such as aluminium alloy or magnesium alloys under isothermy, adopt a cover shaping dies to be shaped in two steps, make the smart base of wheel hub, the smart base of the wheel hub that makes is promptly become the wheel hub product through a small amount of machining and surface treatment.
Embodiment one: extremely shown in Figure 5 as Fig. 2, automotive hub combination Plastic Forming mould of the present invention comprises a box-like counterdie of lobe, the box-like counterdie of this lobe has a lobe and closes die, this lobe closes die and is made up of plural recessed model petal block 5, the bottom of closing die at lobe is provided with a lower punch 7, central slide at lower punch 7 is fitted with a backing-out punch 6, this lobe close die when matched moulds and lower punch 7 and backing-out punch 6 surround the die cavity of the wheel hub that is used to be shaped jointly, it is identical to close the outer surface profile of die internal face that surrounds and the wheel hub top wheel rim that will be shaped by lobe in the die cavity, lower punch 7 coincide with the spoke outer surface profile of the backing-out punch 6 common upper surfaces that constitute with the wheel hub that will be shaped, lower punch 7 is provided with the annular groove that coincide with the wheel rim substructure that will be shaped with the junction that lobe closes die.For ease of installing and fixing of lower punch 7, in the present embodiment, also be provided with a backing plate 9 in the bottom of lower punch 7, this lower punch 7 is inlaid in the mounting groove that the center correspondence of backing plate 9 upper surfaces offers.Simultaneously, the bottom of backing-out punch 6 pass backing plate 9 and by the step surface that axially is provided with down on its outer peripheral face by backing plate 9 axial limitings.
In the present embodiment, also be set with a die sleeve 8 outside each recessed model petal block 5, each recessed model petal block 5 is slidingly matched with die sleeve 8 by 8 constraints of this die sleeve and the inclined ramp 16 by both sides.Die sleeve 8 all is fixedly mounted on the die shoe 13 with backing plate 9, can realize stable support to shaping dies by this die shoe 13.For realizing that lobe closes the folding mould of die, close at lobe on each recessed model petal block 5 of die and be connected with folding mould driving mechanism respectively.In the present embodiment, this folding mould driving mechanism comprises that correspondence is arranged at the little push rod 10 of each recessed model petal block 5 bottom, each little push rod 10 endwisely slips and is installed in the unthreaded hole that correspondence is offered on the backing plate 9, the top jacking of each little push rod 10 is in the bottom of the recessed model petal block 5 of correspondence, jacking is connected with top board 11 in the bottom of each little push rod 10, and this top board 11 radially is fixed on the upper end of the big push rod 12 of a coaxial setting.When big push rod 12 moves upward, promote little push rod 10 by top board 11 and move upward, little push rod 10 promotes corresponding recessed model petal block 5 and moves upward along the inclined ramp on die sleeve 8 cone-shaped walls, thereby realizes die sinking.Owing to the wheel hub product must be avoided when the demoulding wheel hub product to be closed die by lobe stopping and produce distortion, therefore need to make lobe close at first die sinking of die by folding mould driving mechanism earlier, and then carry out the demoulding of wheel hub product, in the present embodiment, for simplifying the structure of mould, the die sinking and the demoulding can be carried out synchronously, its bottom with backing-out punch 6 is axially extended the upper surface near top board 11 downwards, between the upper surface of the bottom of backing-out punch 6 and top board 11, be installed with spacing, make when the demoulding, big push rod 12 promotes the up jacking lobes of little push rod earlier by top board 11 and closes die, makes lobe close the die sinking of die elder generation, when top board 11 up during by the bottom of the spacing jacking between backing-out punch 6 and the top board 11 at backing-out punch 6, it is up to promote backing-out punch 6 again, the realization die sinking and the demoulding are carried out synchronously, and the wheel hub product of making is ejected, and finish the demoulding.
For preventing in process of production, each recessed model petal block 5 is oppositely upwards slided along the inclined ramp on the die sleeve 8 by the effect of flow of metal power, mould was lost efficacy, among the present invention, on each recessed model petal block 5, also be respectively arranged with the stopping means that prevents that it is up in extrusion process, this stopping means be included in the vertical pin-and-hole 14 die sleeve 8 and the joint portion between each recessed model petal block 5 offered respectively and with the vertical pin 15 of each pin-and-hole 14 corresponding inserting, vertical pin 15 is installed in use on the forcing press and goes up punch 2 synchronization actions on punch 1 or the bulging with extruding, during use, punch 2 is simultaneously descending on last punch 1 of vertical pin 15 and extruding or the bulging, be inserted in the corresponding pin-and-hole 14 that is provided with, each recessed model petal block 5 is carried out axial spacing, thereby can prevent the reverse slide of each recessed model petal block 5, guarantee carrying out smoothly of production.In actual applications, it also can adopt on the outer peripheral face of punch 2 on punch 1 and the bulging in the extruding corresponding each recessed model petal block 5 radially to be convexly equipped with the mode of limited block, each recessed model petal block 5 is carried out axial spacing, also can reach identical technique effect.
Also comprise punch in one group of combination with the box-like counterdie of lobe corresponding matching successively in the automotive hub of the present invention combination Plastic Forming mould, punch closes on the bulging punch 2 and forms by pushing the epirelief cross cutting in this combination.Wherein, the profile of punch 1 adopts cylindrical structural in the extruding, and the minimum diameter in its diameter and the die cavity is suitable, and the minimum diameter of its outer peripheral face and die cavity is partly formed the backward extrusion work zone, and its bottom surface is the plane.In this extruding during the box-like counterdie corresponding matching of punch 1 and above-mentioned lobe, be formed for the ring cavity of preform hollow pipe 3 structures between the internal face that the outer peripheral face of punch 1 bottom and lobe close die in the extruding, it is the cavity that plane, bottom and spoke outer surface profile coincide, are used for the preform spoke architecture that the upper surface of its bottom surface and lower punch 7 and backing-out punch 6 surrounds top.The main body of punch 2 also adopts cylindrical structure on the bulging, and the outer peripheral face shape of its underpart is coincide with the inner surface profile of the wheel hub top wheel rim that will be shaped, and its bottom shape coincide with the spoke inner surface profile of the wheel hub that will be shaped.Thereby the time with the box-like counterdie corresponding matching of lobe, the ring cavity that forms between its underpart outer peripheral face and the die inwall coincide with top wheel rim 4 structures of the wheel hub that will be shaped, and the cavity that surrounds between the upper surface of its bottom surface and lower punch 7 and backing-out punch 6 coincide with the spoke architecture of the wheel hub that will be shaped.
In the above-mentioned extruding on punch 1 and the bulging punch 2 successively with the box-like counterdie corresponding matching of lobe, adopt two step forming modes that blank is crushed to wheel hub.Wherein, go up cavity volume that punch 1 and lower punch 7 and backing-out punch 6 surround by extruding and equate with the cavity volume that lower punch 7 and backing-out punch 6 surround by punch on the bulging 2.For realizing the isothermal extruding, insert electrically heated rod respectively after the present invention adopts and holes in punch 2, lower punch 7 and each the recessed model petal block 5 on punch 1, the bulging and heat in extruding, and use thermocouple observing and controlling temperature respectively; In order to reduce thermal loss, the exposed parts of each heating mould part and and fixture between adopt heat-preservation cotton heat insulation.
During shaping, follow these steps to finish shaping work:
⑴ the aluminium alloy or the bar-shaped blank of magnesium alloy of, hub for vehicle wheel material selection as cast condition or extruding attitude, the minimum diameter size blanking that this bar-shaped blank is pressed in the box-like counterdie die cavity of lobe forms biscuit, the volume of biscuit is suitable with the wheel hub volume that will be shaped, and this biscuit performance after the homogenising solution treatment is better;
⑵, the biscuit that makes is preheating to 120～180 ℃, and corresponding different materials is heated to the forming temperature of technological requirement with biscuit and is incubated after lubricant is smeared on its surface, Mg alloy formed temperature is 350～420 ℃, and the aluminium alloy forming temperature is 400～480 ℃;
⑶, on request mould is heated, be warm-extrusion formings such as realization, the heating-up temperature of mould is consistent with the forming temperature of biscuit, and Mg alloy formed temperature is 350～420 ℃, and the aluminium alloy forming temperature is 400～480 ℃, and requires mold temperature even;
⑷, the biscuit that heats is put into the die cavity bottom of the box-like counterdie of lobe, and will push on the working position that punch 1 is installed to forcing press, the starting pressure machine, as shown in Figure 6, forcing press drives extruding, and upward punch 1 is descending with vertical pin 14, prevent that it is up in the pin-and-hole 15 between vertical pin insertion die sleeve 8 and each the recessed model petal block 5, punch 1 cooperates with die and makes biscuit distortion form prefabricated component 3 in the extruding, wherein, part metal flow is in by the annular groove between lower punch 7 and the die, the substructure of wheel rim is shaped, extruding is simultaneously gone up punch 1 and is cooperated preform to go out the outer surface profile of the spoke of wheel hub with lower punch 7, the inner surface of its spoke part is the plane, simultaneously, the remainder metal then outer peripheral face reverse flow through pushing punch 1 enters extruding and goes up in the ring cavity between punch 1 and the die and be configured as the hollow tube blank structure, thereby preliminary preform goes out the superstructure of wheel rim;
⑸, the movable drive of forcing press are pushed upward punch 1 and vertical pin 14 backhauls;
⑹, punch on the bulging 2 is changed to the operating position;
⑺ punch 2 is descending on, the forcing press drive bulging, as shown in Figure 7, on the bulging punch 2 by its bottom shape with the performing member 3 that is shaped in the first step pressing steps be shaped the spoke inner surface profile of wheel hub, thereby the whole spoke architecture that cooperates the wheel hub that is shaped with the upper surface of lower punch 7 and backing-out punch 6, simultaneously, the outer peripheral face of punch 2 cooperates with die on the bulging, the be shaped hollow tube blank structure on wheel rim top of the prefabricated component 3 that of the first step is carried out the rigidity bulging, the wheel rim superstructure of wheel hub that is shaped, thus make wheel hub 4;
⑻, forcing press drive punch 2 backhauls on the bulging; As shown in Figure 8, big push rod 12 upwards promotes top board 11 and drives little push rod 10 and order about each recessed model petal block 5 along the realization die sinking that moves upward of the inclined ramp of die sleeve 8, big push rod 12 continues up, and top board 11 is deviate from the wheel hub of making 4 by backing-out punch 6 from lower punch 7, finish the demoulding;
⑼, ejecting mechanism backhaul, each recessed model petal block 5 moves downward along inclined ramp by self gravitation and carries out matched moulds, will push punch 1 simultaneously and gain former operating position;
⑽, repeat the above-mentioned ⑷ step, carry out the shaping of next wheel hub again to the ⑼ process in step.
⑾, the wheel hub of step ⑼ is carried out subsequent heat treatment, a small amount of follow-up machining and surface treatment promptly get automobile disc wheel of light metal alloy.
In the present embodiment, in order to reduce the frictional force of extrusion molding, go up the working diameter of punch 1 as extruding with the minimum diameter of the wheel rim outer surface of the wheel hub that will be shaped, making extruding go up punch 1 cooperates with the minimum diameter of the die of each recessed model petal block 5 composition, form the backward extrusion work zone, impel the clout reverse flow to form hollow tube blank structure 3.For reducing the plastic force of punch when cooperating on the second step bulging with counterdie, the extruding force of each step in the shaping of two steps is tended to balance, among the present invention, lower punch 7 and the backing-out punch 6 common upper surfaces of forming are gone up being used to of surrounding between the punch 2 on punch 1 and the bulging be shaped cavity volume of spoke part respectively at extruding and are equated, the spoke part structure that first step preform is gone out only produces deformation in second step, and can not produce as metal reverse flow in the first step pressing steps, thereby make the structure formation of spoke part more reasonable, the distribution of extruding force is more balanced.
Embodiment two: as shown in Figure 9, present embodiment two is with the difference of embodiment one, each recessed model petal block 5 that the lobe that is provided with in the box-like counterdie of lobe closes die is installed on the die shoe 13 by horizontal slideway, what adopt at the folding mould driving mechanism that is in transmission connection on each recessed model petal block 5 is the driving cylinder 14 that is connected on each recessed model petal block 5 outer surface, and this driving cylinder 14 can adopt electronic cylinder or hydraulic cylinder.
The combination forming method of automotive hub of the present invention will be pushed and two forming technologies of bulging are combined in the operation by a cover shaping dies and are shaped in two steps, wherein, the bottom surface of punch 1 is the plane in the extruding, be formed for the ring cavity of preform hollow tube blank structure between its outer peripheral face and the die inwall, and the bottom surface of punch 2 coincide with the spoke inner surface profile that will be shaped on the bulging, its outer peripheral face coincide with the wheel rim superstructure of the wheel hub that will be shaped, make the spoke architecture and the rim structure of wheel hub all be shaped at twice, in the first step extrusion process step only preform gone out the outer surface profile and the hollow tube blank structure of spoke part, in the bulging process step in second step, just make final shaping of spoke also finally be shaped the superstructure of wheel rim.This technological process is the substep forming technology scheme of formulating according to the design feature of automotive hub, be shaped with a mold, be convenient to the flow forming of metal, be not difficult to the corner that is full of during shaping, and the spoke architecture of wheel hub and rim structure all be shaped in two steps, make that the plastic force of its each one is all very little, thereby can reduce the tonnage of equipment, reduce input equipment.Simultaneously, adopt a mold to be shaped in two steps and can reduce the more process of mold exchange, improve the efficient that wheel hub is made.
The present invention is not limited to the foregoing description; the lobe of the box-like counterdie of lobe close the folding mould driving mechanism that is in transmission connection on the die can also adopt install on the enlarging mould among the publication file ZL200910064335.9 mainly by die guide plate, curved pin mechanism and correspondingly be opened in the clasp mould mechanism that the taper pin hole on the recessed model petal block is formed; its concrete structure can repeat no more with reference to this patent of invention file herein.
The present invention not only can be applied to the shaping of the automotive hub of magnesium alloy or aluminium alloy, also can be applied to the shaping that other adopts the parts of aluminium, magnesium alloy.
Claims (10)
1. the combination plastic molding method of an automotive hub, it is characterized in that, this method with the light-alloy blank under isothermy, adopt a cover shaping dies to be shaped in two steps, this shaping dies have a box-like counterdie of lobe and with the box-like counterdie of this lobe extruding of corresponding matching successively on punch on punch and the bulging, be provided with by lobe in the box-like counterdie of described lobe and close die, the die cavity that lower punch and backing-out punch surround, the first step is earlier put into the light-alloy blank die cavity and is gone up punch and the box-like counterdie of lobe by extruding and cooperate and adopt the extrusion process preform to go out the spoke outer surface profile of wheel hub and the substructure of wheel rim during shaping, and simultaneously clout is pre-formed into the hollow tube blank structure, the overall structure of spoke thereby the spoke inner surface profile that second step cooperated the performing member extrusion molding that first step extrusion molding is gone out to go out wheel hub with punch on the bulging and the box-like counterdie of this lobe again is shaped, the hollow tube blank structure that first step preform is gone out by bulging process is configured as the superstructure of wheel rim simultaneously, make the smart base of wheel hub, promptly become the wheel hub product through a small amount of machining and surface treatment again.
2. the combination plastic molding method of automotive hub according to claim 1 is characterized in that, described light-alloy blank is with as cast condition or pushes the bar-shaped blank of attitude light-alloy after the homogenising solution treatment, the biscuit that processing obtains.
3. the combination plastic molding method of automotive hub according to claim 1, it is characterized in that, it is 350 ℃ to 420 ℃ that described magnesium alloy blank is shaped temperature required, it is 400 ℃ to 480 ℃ that described aluminum alloy blank is shaped temperature required, and the temperature of described shaping dies is consistent with the forming temperature of blank.
4. complete assembling die, it is characterized in that, comprise a box-like counterdie of lobe and successively with the extruding of the box-like counterdie corresponding matching of this lobe on punch on punch and the bulging, the box-like counterdie of described lobe comprises by lobe and closes the die cavity that backing-out punch that die and lower punch and slip be plugged in the lower punch center surrounds, it is identical to close the outer surface profile of die internal face that surrounds and the wheel hub top wheel rim that will be shaped by lobe in the die cavity, the common upper surface that constitutes of lower punch and backing-out punch coincide with the spoke outer surface profile of the wheel hub that will be shaped, the junction that lower punch and lobe close die is provided with the annular groove that coincide with the wheel rim substructure that will be shaped, described lobe closes die to be made up of plural recessed model petal block, is connected with folding mould driving mechanism respectively on described each recessed model petal block; The minimum diameter of the outer peripheral face of punch and die cavity is partly formed the backward extrusion work zone that is used for preform hollow tube blank structure in the described extruding; The outer peripheral face of punch bottom is provided with the surface texture that coincide with the inner surface profile of the wheel hub top wheel rim that will be shaped on the described bulging, and its bottom shape coincide with the spoke inner surface profile of the wheel hub that will be shaped.
5. complete assembling die according to claim 4, it is characterized in that, comprise that also support and connection close the backing plate of die and lower punch bottom at lobe, described lower punch is flush-mounted in the center of this backing plate upper surface, the bottom surface that described lobe closes each recessed model petal block of die closely contacts cooperation with the upper surface of backing plate, described backing-out punch by the step surface that axially is provided with down on the side face by the backing plate axial limiting.
6. complete assembling die according to claim 5, it is characterized in that, described each recessed model petal block is set with a die sleeve outward, each recessed model petal block is retrained by this die sleeve and is slidingly matched by inclined ramp and die sleeve, described folding mould driving mechanism comprises that correspondence is arranged at the little push rod of each recessed model petal block bottom, each little push rod endwisely slips and is installed in the unthreaded hole that the backing plate correspondence offers, the top jacking of each little push rod is connected with top board in the bottom of each little push rod by big push rod jacking in the bottom of the recessed model petal block of correspondence.
7. complete assembling die according to claim 6 is characterized in that, the bottom of described backing-out punch is axially extended the upper surface near top board down, is installed with spacing between the bottom surface of backing-out punch and the upper surface of top board.
8. according to any described complete assembling die of claim 4 to 7, it is characterized in that the cavity volume that punch, lower punch and backing-out punch surround in the described extruding and equate with the cavity volume that lower punch and backing-out punch surround by punch on the bulging.
9. punch in the combination, it is characterized in that comprise pushing and go up punch on punch and the bulging, punch is a cylindrical structure in the described extruding, the bottom surface is the plane, and its diameter quite and with the minimum diameter of die cavity is partly formed the backward extrusion work zone with the minimum diameter in the die cavity that is used for corresponding matching; Punch also is a cylindrical structure on the described bulging, and the outer peripheral face shape of its underpart is coincide with the inner surface profile of the wheel hub top wheel rim that will be shaped, and its bottom shape coincide with the spoke inner surface profile of the wheel hub that will be shaped.
10. punch in the extruding is characterized in that, it is cylindrical structure that punch is gone up in this extruding, and the bottom surface is the plane, and its diameter quite and with the minimum diameter of die cavity is partly formed the backward extrusion work zone with the minimum diameter in the die cavity that is used for corresponding matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110024157 CN102179664B (en) | 2010-12-30 | 2011-01-21 | Combined plastic forming method of automobile hub and matching forming mold of automobile hub |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010615200 | 2010-12-30 | ||
| CN201010615200.X | 2010-12-30 | ||
| CN 201110024157 CN102179664B (en) | 2010-12-30 | 2011-01-21 | Combined plastic forming method of automobile hub and matching forming mold of automobile hub |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102179664A true CN102179664A (en) | 2011-09-14 |
| CN102179664B CN102179664B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200202132U Expired - Lifetime CN202037202U (en) | 2010-12-30 | 2011-01-21 | Combination plastic matched forming die of automobile hub |
| CN2011200202113U Expired - Lifetime CN202180134U (en) | 2010-12-30 | 2011-01-21 | Complete-set combined die for automobile wheel hub, and upper male die and lower die thereof |
| CN201110024159.3A Expired - Fee Related CN102179665B (en) | 2010-12-30 | 2011-01-21 | Combined plastic forming method of automobile hub and matching forming mold of automobile hub |
| CN 201110024157 Expired - Fee Related CN102179664B (en) | 2010-12-30 | 2011-01-21 | Combined plastic forming method of automobile hub and matching forming mold of automobile hub |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200202132U Expired - Lifetime CN202037202U (en) | 2010-12-30 | 2011-01-21 | Combination plastic matched forming die of automobile hub |
| CN2011200202113U Expired - Lifetime CN202180134U (en) | 2010-12-30 | 2011-01-21 | Complete-set combined die for automobile wheel hub, and upper male die and lower die thereof |
| CN201110024159.3A Expired - Fee Related CN102179665B (en) | 2010-12-30 | 2011-01-21 | Combined plastic forming method of automobile hub and matching forming mold of automobile hub |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102179665B (en) | 2014-07-16 |
| CN102179664B (en) | 2013-03-20 |
| CN102179665A (en) | 2011-09-14 |
| CN202180134U (en) | 2012-04-04 |
| CN202037202U (en) | 2011-11-16 |
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