CN1864915A - A labor-saving automobile hub forming method and device - Google Patents
A labor-saving automobile hub forming method and device Download PDFInfo
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- CN1864915A CN1864915A CN 200610012829 CN200610012829A CN1864915A CN 1864915 A CN1864915 A CN 1864915A CN 200610012829 CN200610012829 CN 200610012829 CN 200610012829 A CN200610012829 A CN 200610012829A CN 1864915 A CN1864915 A CN 1864915A
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Abstract
The invention relates to a method for shaping the vehicle hub and relative device. Wherein, it comprises following steps that casting blank; uniform processing; pre-shaping blank; compressing; compressing the front rim; expanding opening and folding the edge at the back rim. The invention is characterized in that: the casting blank via pre-shaping is made into hollow blank; the concave and convex moulds in the compressing step and the compressing front rim step are integrated, while the convex mound contains core axle; the compressing step compresses the hollow blank in the mould via core axle to obtain the cylinder element whose bottom has holes; the step that compressing front rim uses metal diversion to stuff and shape; the step that expanding opening and folding the edge of back rim uses integrated convex mould and separated concave mould to expand opening, fold edge an shape the back rim. The invention can simplify the process, reduce device number, reduce the shaping force, reduce the energy consumption, and reduce the producing cost. The invention is mainly used to produce aluminum and magnesium alloy hub.
Description
One, technical field
The invention belongs to aluminium, magnesium alloy extrusion forming technology, the laborsaving manufacturing process and the device of particularly a kind of aluminium, magnesium alloy auto hub and annulus and disk-shaped part.
Two, background technology
Along with the development that global auto industry is advanced by leaps and bounds, the automobile lightweight is brought into schedule.In order to alleviate the automobile own wt, improve fuel-saving efficiency, reduce exhaust pollution, guarantee automotive safety, make its serviceability better.Lightweight structural material (as aluminium, magnesium alloy etc.) demonstrates huge superiority on automobile, magnesium alloy especially, and light weight not only, the specific strength height, and also damping capacity is good, is the good damping material that is used to make as automotive hub etc.
As the wheel hub of automobile important safety parts, its impact property, flexural fatigue performance and radially main Mechanical such as fatigue behaviour require highly, grain size, air-tightness and surface quality are had certain requirement.Both at home and abroad automotive hub mainly is divided into two kinds of cast type and forging formulas.And, be limited to the small lot batch manufacture of specific use wheel hub because the forging method ubiquity production process of wheel hub is many, production efficiency is lower, cost is far above casting always, as using on racing car and high-grade car, its manufacturing cost general car is difficult to bear.At present, mainly still adopt methods such as die casting, gravitational casting to make wheel hub.The material that uses is mainly aluminium alloy, as: " magnesium alloy steamer hub casting research " literary composition of " foundry engieering " magazine publication in May calendar year 2001.Practical application for magnesium alloy hub is also rarely reported, and adopts casting method for magnesium alloy hub, because strength character etc. are difficult to satisfy instructions for use, also has certain limitation.
U.S. Pat 005902424A discloses a kind of magnesium alloy molded processing method, (METHODOF MAKING AN ARTICLE OF MANUFCTURE MADE OF MAGNESIUM ALLOY) this is that a kind of employing continuous casting magnesium alloy round bar is a forging stock, adopt casting ingot and---forge---the T6 processing technology such as rolling of---swaging---, after the contour forging technique moulding, finish manufacturing steamer hub hub product by rolling mill practice.Though the wheel hub that this method is made magnesium alloy materials has good organization and mechanical performance, its technology and complexity thereof, required equipment is more, and investment is big, and production cost is very high.
China Patent No. is: ZL031008933 discloses the casting of magnesium alloy steamer hub hub and has squeezed combined shaping method, adopt casting technique to make required blank, be characterized in: also have preform, the upsetting extrusion of Critical Control distortion and isothermal extruding, and finishing process, wherein:
Leave the preallocation amount of required distribution metal material volume in the extrusion process that makes metal material successfully be full of the entire die die cavity behind a, smart strand material and the preform;
Deformation extent, rate of deformation and the deformation temperature relevant parameter of b, employing Critical Control deformation method control magnesium alloy materials, and be controlled in the tolerance zone;
C, spraying reduces resistance of deformation and improves the lubrication prescription of die life and product surface quality in mold cavity.
Cause that for preventing to heat again grain growth causes mechanical performance to descend in its method, adopt with the increase of technology and reduce the shaping method of temperature gradually.It has overcome gravity casting method and produces and can't satisfy the low defective of wheel hub instructions for use performance, and can reach the product mechanical performance requirement that the die forging milling method is produced.Provide the production method of magnesium alloy hub for producing high-grade automobile.Adopt Critical Control distortion and lubricant to guarantee metal material filling die cavity, refinement grain structure, the interior tissue of goods is fine and close more, crystallite dimension is littler, has improved mechanical performance of products and surface quality such as magnesium alloy hub, has reduced equipment, reduced production cost, but its technology or more complicated, plastic force is big, the front and back wheel rim is shaped difficulty, be difficult to the demoulding, and equipment needed thereby pressure is bigger.These all are main insoluble problems in aluminium, the magnesium alloy hub extrusion forming technology.
Three, summary of the invention
The objective of the invention is the deficiency that comprehensive the above prior art exists, prior art is done further improvement, proposed a kind of reduction wheel hub plastic force, minimizing equipment drops into simultaneously, reduce production costs, improve the labor-saving automobile hub forming method and the device of extrusion molding product quality.
Technical scheme of the present invention for achieving the above object is:
A kind of labor-saving automobile hub forming method of the present invention, comprise casting ingot-homogenising processing-preform base-extruding-upsetting squeeze front wheel felloe-enlarging flange rear rim technology, be characterized in: described casting ingot becomes hollow blank through the preform blank-making technology, punch and die in extruding and the upsetting squeeze front wheel felloe technology are unitary mould, have mandrel in the punch, the extrusion process employing by mandrel extruded hollow blank, is squeezed into a cylindrical component in tail band hole in mould; Upsetting squeeze front wheel felloe process using metal shunting filling is shaped; Enlarging flange rear rim process using solid punch and split die carry out enlarging flange and moulding rear rim.
Described preform blank-making technology, jumping-up predeformation hollow blank under the casting ingot free state reduces force in extrusion.
Described extrusion process, axle diameter is less than the internal diameter of hollow blank; Reduce mandrel and hollow blank contact area, reduce the mean normal stress on the contact-making surface, force in extrusion is reduced.
Described upsetting squeeze front wheel felloe technology, adopt metal shunting filling to be shaped, upsetting squeeze front wheel felloe under responsive to axial force, inwardly with outwards both direction is mobile simultaneously to make the tube bottom that is extruded part divide metal, become the closed open shaping that is configured as, wheel hub and wheel rim are full of fully, and unnecessary metal can flow to barrel portion.
Described enlarging flange rear rim technology adopts the monoblock type punch axially to load, and the progressively enlarging of finishing the wheel rim position is shaped, and uses split type die to form rear rim at the enlarging flange, takes out split type die respectively, and split type die makes the smooth demoulding of extrusion.
The device of a kind of labor-saving automobile hub forming of the present invention comprises cope match-plate pattern, punch, backing plate, lower bolster, die, push rod; Punch is loaded under backing plate below the cope match-plate pattern, die be loaded on lower bolster above, push rod is positioned at the lower bolster jogger hole; Be characterized in: have mandrel on the described punch.
Described die has die case and split die, and the split die is loaded in the die case; Die case is fixed on the lower bolster.
The device of a kind of labor-saving automobile hub forming of the present invention has three molds, comprises indirect-extrusion mould, upsetting squeeze front wheel felloe mould and enlarging flange rear rim mould.
Described indirect-extrusion mould comprises cope match-plate pattern, backing plate, mandrel, punch, location-plate, pin and pin, die, lower bolster, push rod, kicker, trip bolt and trip bolt; Punch is loaded on below the cope match-plate pattern by trip bolt and pin by location-plate under backing plate, and mandrel is housed in the punch; Die by trip bolt and pin be loaded on lower bolster above, the top dress kicker of lower bolster in the die, product is extruded the hollow stock of part and puts into die; Push rod is positioned at the lower bolster jogger hole, withstands on below the kicker.Mandrel inserts in the hollow of casting hollow blank of extrusion during extruding.
Described upsetting squeeze front wheel felloe mould comprises cope match-plate pattern, backing plate, interior flange, mandrel, fixed head, pin and pin, shrink ring, lower bolster, die, head part bar, head part bar plate, inserts, push rod, trip bolt and trip bolt, extrusion, punch etc.; Punch is loaded on below the cope match-plate pattern by trip bolt and pin by fixed head under backing plate, and mandrel is housed in the punch; Shrink ring by trip bolt and pin be loaded on lower bolster above, die is loaded in the shrink ring, insert be contained in lower bolster in the die above, die is provided with at least two holes, dress head part bar in the hole, the head part bar is contained on the head part bar plate, and head part bar plate is loaded on the push rod; Push rod is positioned at the lower bolster jogger hole, withstands on below the head part bar plate.
Described enlarging flange rear rim mould comprises lower bolster, extrusion, die case, split die, split punch, cope match-plate pattern, backing plate, punch, lower bolster, pin, push rod, mandrel, trip bolt and trip bolt etc.; Die case by trip bolt and pin be loaded on lower bolster above, in the die case lower bolster above load backing plate, dress split die on the lower bolster and in the die case; Lower bolster is provided with the hole that holds mandrel, and push rod is positioned at the lower bolster jogger hole, withstands on below the lower bolster; Punch is loaded on below the cope match-plate pattern by trip bolt and pin under backing plate, mandrel is housed below the punch.
A kind of labor-saving automobile hub forming method of the present invention and device have substantive technical characterstic with remarkable technique effect to be compared with the prior art:
(1) simplifies operation and technical process, reduced mold tooling and equipment, reduced production cost;
(2) casting ingot preform hollow blank, jumping-up predeformation casting ingot under the free state, thinning microstructure improves formability, reduces flow stress, and the deformation force when reducing the squeeze pack mould has reduced plastic force, has reduced energy consumption;
(3) mold tooling is simple in structure, and direct forming goes out the wheel hub centre bore, saves follow-up punching or machined preface.Plastic force is big when solving the magnesium alloy hub precision form, the demoulding is difficult and wheel rim such as is difficult to be full of at problem;
(4) good product performance, dimensional accuracy and surface accuracy height have improved the extrusion molding product quality, the stock utilization height;
(5), can realize the different spoke cross sectional shapes of various wheel hubs by punching, trimming.
Labor-saving automobile hub forming method and device that the present invention proposes are mainly used in aluminium, the shaping of magnesium alloy steamer hub, also can be widely used in the shaping manufacturing of various aluminium, magnesium alloy annulus or disk-shaped part.
Four, description of drawings
Fig. 1 is a kind of process chart of labor-saving automobile hub forming method.
Fig. 2 is the backward extrusion technology schematic diagram;
Fig. 3 is a upsetting squeeze front wheel felloe process schematic representation;
Fig. 4 is an enlarging flange rear rim process schematic representation;
Fig. 5 is the indirect-extrusion mould structural representation;
Fig. 6 is a upsetting squeeze front wheel felloe mould structure schematic diagram;
Fig. 7 is an enlarging flange rear rim mould structure schematic diagram;
Fig. 8 is an automotive hub finished product structural representation.
Five, the specific embodiment
Below in conjunction with accompanying drawing with regard to the specific embodiment be elaborated (present embodiment is to further specify of the present invention, rather than any qualification that the present invention is made).
Shown in Figure 1, a kind of process chart of labor-saving automobile hub forming method.A kind of labor-saving automobile hub forming method comprises casting ingot-homogenising processing-preform base-extruding-upsetting squeeze front wheel felloe-enlarging flange rear rim technology, and finishing procedure; Wherein extrusion process is to adopt backward extrusion technology.
Preform blank-making technology: jumping-up preform hollow blank under the casting ingot free state.
Shown in Figure 2, be referred to as " hollow blank, mandrel extruding " method.Backward extrusion technology: use to have the mandrel punch, be unitary mould, by mandrel extruded hollow blank, axle diameter is less than the internal diameter of hollow blank in mould in the backward extrusion technology employing; Reduce mandrel and hollow blank contact area, reduce the mean normal stress on the contact-making surface, inwardly with outwards both direction is mobile simultaneously to make the metal that is extruded, and force in extrusion is further reduced.And be that road technology (upsetting squeeze front wheel felloe) shunting filling shaping provides possibility down.Direct forming goes out the wheel hub centre bore simultaneously, saves follow-up punching or machined preface.From thermal simulation, plane strain compression and squeeze test result as can be known, under processing parameters was rationally mated, the direct plastic deformation of magnesium alloy cast blank was feasible, can reach the purpose of thinning microstructure and reduction flow stress behind the casting ingot preform.
Shown in Figure 3, utilized " metal shunting filling " principle.Upsetting squeeze front wheel felloe technology: adopt metal shunting filling to be shaped, be squeezed into a cylindrical component in tail band hole, adopt solid punch and split die to carry out enlarging flange rear rim in enlarging flange rear rim operation.Upsetting squeeze front wheel felloe operation adopts metal shunting filling to be shaped: be extruded part upsetting squeeze front wheel felloe under responsive to axial force, inwardly with outwards both direction is mobile simultaneously to make the tube bottom that is extruded part divide metal, become the closed open shaping that is configured as, wheel hub and wheel rim are full of fully, and unnecessary metal can flow to barrel portion.And force in extrusion is reduced.
Shown in Figure 4, be referred to as " solid punch, split die enlarging flange " method.Enlarging flange rear rim technology: adopt the monoblock type punch axially to load, the progressively enlarging A that finishes the wheel rim position is shaped, use split type die to form rear rim B at the enlarging flange, take out split type die respectively, split type die has guaranteed the smooth demoulding of extrusion.
A kind of labor-saving automobile hub forming method is finishing process at last: by punching, to hole and spoke shaping, can realize the different spoke cross sectional shapes of various wheel hubs.
In addition, the outer heating and heat-insulating device that has thermocouple observing and controlling temperature that uses of mould carries out concurrent heating.Can reduce the deformation force of extrusion so significantly.
Fig. 5, Fig. 6 and shown in Figure 7, a kind of device of labor-saving automobile hub forming.It has three molds, comprises indirect-extrusion mould, upsetting squeeze front wheel felloe mould and enlarging flange rear rim mould.
Shown in Figure 5, indirect-extrusion mould comprises cope match-plate pattern 101, backing plate 103, mandrel 104, punch 105, location-plate 106, pin 107 and pin 109, die 108, lower bolster 110, extrusion 111, push rod 112, kicker 113, trip bolt 102 and trip bolt 114 etc.Punch is loaded on below the cope match-plate pattern by trip bolt 102 and pin 107 by location-plate under backing plate, and mandrel is housed in the punch; Die by trip bolt 114 and pin 109 be loaded on lower bolster above, the top dress kicker of lower bolster in the die, product is extruded part hollow blank 111 and puts into die; Push rod is positioned at the lower bolster jogger hole, withstands on below the kicker.In the hollow of the casting hollow blank of mandrel insertion extrusion, this mould is finished extruding predeformation, extrusion process during extruding, and metal shunting filling is shaped, and is squeezed into a cylindrical component in tail band hole.Axle diameter is less than the internal diameter of hollow blank, casting ingot jumping-up predeformation under the free state in die, and thinning microstructure improves formability, reduces flow stress, the deformation force when reducing the squeeze pack mould.Force in extrusion is reduced.
Shown in Figure 6, upsetting squeeze front wheel felloe mould comprises cope match-plate pattern 201, backing plate 203, interior flange 204, mandrel 205, fixed head 206, pin 207 and pin 209, shrink ring 208, lower bolster 210, die 211, head part bar 212, head part bar plate 213, insert 214, push rod 216, trip bolt 202 and trip bolt 215, extrusion 217, punch 218 etc.; Punch is loaded on below the cope match-plate pattern by trip bolt 202 and pin 207 by fixed head under backing plate, and mandrel is housed in the punch; Shrink ring 208 by trip bolt 215 and pin 209 be loaded on lower bolster above, die is loaded in the shrink ring, insert be contained in lower bolster in the die above, die is provided with at least two holes, dress head part bar in the hole, the head part bar is contained on the head part bar plate, and head part bar plate is loaded on the push rod; Push rod is positioned at the lower bolster jogger hole, withstands on below the head part bar plate.Be extruded part 17 upside-down mountings in mould, upsetting squeeze front wheel felloe under responsive to axial force, inwardly with outwards both direction is mobile simultaneously to make the tube bottom that is extruded part divide metal, becomes the closed open shaping that is configured as, wheel hub and wheel rim are full of fully, and unnecessary metal can flow to barrel portion.
Shown in Figure 7, enlarging flange rear rim mould comprises lower bolster 301, extrusion 302, die case 304, split die 305, split punch 306, cope match-plate pattern 308, backing plate 309, punch 310, lower bolster 311, pin 312, push rod 313, mandrel 314, trip bolt 303 and trip bolt 307 etc.; Die case by trip bolt 303 and pin 312 be loaded on lower bolster above, in the die case lower bolster above load backing plate, dress split die on the lower bolster and in the die case; Lower bolster is provided with the hole that holds mandrel, and push rod is positioned at the lower bolster jogger hole, withstands on below the lower bolster; Punch 310 is loaded on below the cope match-plate pattern by trip bolt 303 and pin 312 under backing plate, mandrel is housed below the punch; The top enlarging of punch, flange rear rim place are provided with split punch 306, and the split punch has tapering, and progressively enlarging is shaped, and use split type die to form rear rim at the enlarging flange, take out split type die respectively, and split type die makes the smooth demoulding of extrusion.
Use example:
Equipment 6300KN hydraulic press;
Extrusion is chosen and is illustrated in figure 8 as certain automotive hub;
Material select Mg-Al-Zn be alloy A Z80 as experiment material,
Specification: 6 * 14J; Offset distance :+45; Bolt hole count: 4; P.C.D:45; Centre bore: φ 67mm;
1, casting ingot
Adopt electromagnetic casting moulding Φ 310 ingot castings, ingot casting is after homogenising is handled (355 ± 5 ℃, 16h, air cooling), and the turning crust is to Φ 290, and band sawing machine blanking sawing becomes the bar of Φ 290 * 80.
2, predeformation
The cast billets of Φ 290 * 80 is heated to 400 ℃ of jumping-ups and is compressed to external diameter Φ 314, squeezes the core hole then, makes the hollow blank of Φ 314 * 180 * 95.
3, backward extrusion cylindrical member
Adopt " hollow blank, mandrel extruding " method, mould structure as shown in Figure 5.Φ 314 * 180 * 95 hollow blanks that employing is made, the axle diameter Φ 160 of punch.Mould and blank heating to 400 ℃, mould and blank heating are to extrusion temperature, and the outer heating and heat-insulating device that has thermocouple observing and controlling temperature that uses of mould carries out concurrent heating, can reduce deformation force significantly.
4, upsetting squeeze front wheel felloe
The cylindrical member of extruding is in mould structure as shown in Figure 6, finish the shaping of wheel hub and front wheel felloe, wherein adopted " metal shunting filling " principle, mould and blank heating to 350 ℃, concrete molding condition has adopted the local loading technology with the backward extrusion cylindrical member in the distortion final stage.
5, enlarging flange rear rim
Adopted " solid punch, split die enlarging flange " method, mould structure as shown in Figure 7.Concrete molding condition is identical with the backward extrusion cylindrical member, and just blank heating temperature is reduced to 300 ℃.Shaping ejects die after finishing, and separately die takes out workpiece.
6, finishing process
By punching, to hole and spoke shaping, can realize the different spoke cross sectional shapes of various wheel hubs.
7, subsequent heat treatment
To Mg-Al-Zn is that alloy A Z80 adopts single artificial aging to handle, and can obtain higher comprehensive mechanical performance.AZ80 Ageing Treatment standard: 177 ± 5 ℃ are incubated 16 hours.Performance can reach more than the 350Mpa, is fit to the use of high performance requirements and high-grade car.
A kind of labor-saving automobile hub forming method of the present invention and device, employing casting ingot predeformation hollow blank, extruding, metal shunting filling forming technique solve the big and difficult problem of front and back wheel rim shaping of plastic force, and adopt solid punch, split die enlarging flange to solve the problem that is difficult to the demoulding.
Claims (15)
1, a kind of labor-saving automobile hub forming method, comprise casting ingot-homogenising processing-preform base-extruding-upsetting squeeze front wheel felloe-enlarging flange rear rim technology, it is characterized in that: described casting ingot becomes hollow blank through the preform blank-making technology, punch and die in extruding and the upsetting squeeze front wheel felloe technology are unitary mould, have mandrel in the punch, the extrusion process employing by mandrel extruded hollow blank, is squeezed into a cylindrical component in tail band hole in mould; Upsetting squeeze front wheel felloe process using metal shunting filling is shaped; Enlarging flange rear rim process using solid punch and split die carry out enlarging flange and moulding rear rim.
2, a kind of labor-saving automobile hub forming method according to claim 1 is characterized in that: described preform blank-making technology, jumping-up predeformation hollow blank under the casting ingot free state reduces force in extrusion.
3, a kind of labor-saving automobile hub forming method according to claim 1 is characterized in that: described extrusion process, and axle diameter is less than the internal diameter of hollow blank; Reduce mandrel and hollow blank contact area, reduce the mean normal stress on the contact-making surface, force in extrusion is reduced.
4, a kind of labor-saving automobile hub forming method according to claim 1, it is characterized in that: described upsetting squeeze front wheel felloe technology, adopt metal shunting filling to be shaped, upsetting squeeze front wheel felloe under responsive to axial force, inwardly with outwards both direction is mobile simultaneously to make the tube bottom that is extruded part divide metal, become the closed open shaping that is configured as, wheel hub and wheel rim are full of fully, unnecessary metal can flow to barrel portion.
5, a kind of labor-saving automobile hub forming method according to claim 1, it is characterized in that: described enlarging flange rear rim technology, adopt the monoblock type punch axially to load, the progressively enlarging of finishing the wheel rim position is shaped, use split type die to form rear rim at the enlarging flange, take out split type die respectively, split type die makes the smooth demoulding of extrusion.
6, a kind of labor-saving automobile hub forming method according to claim 1 is characterized in that: described finishing procedure: punching, to hole and spoke shaping.
7, a kind of labor-saving automobile hub forming method according to claim 1 is characterized in that: described mould and blank heating are to extrusion temperature, and the outer heating and heat-insulating device that has thermocouple observing and controlling temperature that uses of mould carries out concurrent heating.
8, a kind of labor-saving automobile hub forming device comprises cope match-plate pattern, punch, backing plate, lower bolster, die, push rod; Punch is loaded under backing plate below the cope match-plate pattern, die be loaded on lower bolster above, push rod is positioned at the lower bolster jogger hole; It is characterized in that: have mandrel on the described punch.
9, a kind of labor-saving automobile hub forming device according to claim 8, it is characterized in that: described die has die case and split die, and the split die is loaded in the die case; Die case is fixed on the lower bolster.
10, a kind of labor-saving automobile hub forming device according to claim 9 is characterized in that: have backward extrusion, upsetting squeeze front wheel felloe and enlarging flange rear rim three molds at least.
11, a kind of labor-saving automobile hub forming device according to claim 10 is characterized in that: described indirect-extrusion mould comprises cope match-plate pattern (101), backing plate (103), mandrel (104), punch (105), location-plate (106), pin (107) and pin (109), die (108), lower bolster (110), push rod (112), kicker (113), trip bolt (102) and trip bolt (114); Punch is loaded on below the cope match-plate pattern by trip bolt (102) and pin (107) by location-plate under backing plate, and mandrel is housed in the punch; Die by trip bolt (114) and pin (109) be loaded on lower bolster above, the top dress kicker of lower bolster in the die; Push rod is positioned at the lower bolster jogger hole, withstands on below the kicker.
12, a kind of labor-saving automobile hub forming device according to claim 10 is characterized in that: described upsetting squeeze front wheel felloe mould comprises cope match-plate pattern (201), backing plate (203), interior flange (204), mandrel (205), fixed head (206), pin (207) and pin (209), shrink ring (208), lower bolster (210), die (211), head part bar (212), head part bar plate (213), insert (214), push rod (216), trip bolt (202) and trip bolt (215), extrusion (217), punch (218) etc.; Punch is loaded on below the cope match-plate pattern by trip bolt (202) and pin (207) by fixed head under backing plate, and mandrel is housed in the punch; Shrink ring by trip bolt (215) and pin (209) be loaded on lower bolster above, die is loaded in the shrink ring, insert be contained in lower bolster in the die above, die is provided with at least two holes, dress head part bar in the hole, the head part bar is contained on the head part bar plate, and head part bar plate is loaded on the push rod; Push rod is positioned at the lower bolster jogger hole, withstands on below the head part bar plate.
13, a kind of labor-saving automobile hub forming device according to claim 10 is characterized in that: described enlarging flange rear rim mould comprises lower bolster (301), extrusion (302), die case (304), split die (305), cope match-plate pattern (308), backing plate (309), punch (310), lower bolster (311), pin (312), push rod (313), mandrel (314), trip bolt (303) and trip bolt (307) etc.; Die case by trip bolt (303) and pin (312) be loaded on lower bolster above, in the die case lower bolster above load backing plate, dress split die on the lower bolster and in the die case; Lower bolster is provided with the hole that holds mandrel, and push rod is positioned at the lower bolster jogger hole, withstands on below the lower bolster; Punch is loaded on below the cope match-plate pattern by trip bolt (303) and pin (312) under backing plate, mandrel is housed below the punch.
14, a kind of labor-saving automobile hub forming device according to claim 13 is characterized in that: the top enlarging of described punch (310), flange rear rim place are provided with split punch (306), and the split punch has tapering.
15, a kind of labor-saving automobile hub forming device according to claim 8, it is characterized in that: described mould has the heating and heat-insulating device of thermocouple observing and controlling temperature outward.
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2006
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