Rotation excellent suitability for press forming mould and rotation forging and molding method
The present invention relates to a kind of rotation excellent suitability for press forming mould and rotation forging and molding method, belong to metal-pressed machine neck
Automotive wheel is the vitals for ensureing vehicle safety travel.Compared to steel wheel, aluminum-alloy wheel can subtract
Light car weight, reduction fuel consumption, its bearing capacity is strong, good decorating effect, is more and more favored by people.Current world aluminum
In alloy wheel manufacturing, lightweight, product quality, manufacturing cost have become three big core competitive power factors of product.At present
The aluminum-alloy wheel production technology that both at home and abroad enterprise generally adopts mainly has low pressure casting method, squeeze casting method, three kinds of forging method.
Being most widely used for low pressure casting method, it is high, raw with production efficiency height, conforming product rate height, stock utilization
Produce low cost and other advantages, have the disadvantage wheel for cast sturcture, wheel strength it is not high.
Squeeze casting method, also referred to as liquid forging, are a kind of manufacturing process between casting and forging, its product
Metallographic structure is close to forging tissue, and product mechanical performance has the disadvantage that extrusion casint sets between low pressure casting method and forging method
Standby and mould is complex, and low production efficiency, production cost is higher.
Forging method, is generally divided into solid forging method and two kinds of spinning process of forging.Solid forging method is forged using large-tonnage
Ingot casting is directly forged equipment the profile of wheel rim and spoke, then the method that machining obtains finished product in type cavity mould；Forging
Spinning process is that ingot casting is forged in type cavity mould wheel blanks first with large-tonnage forging equipment, then spin forming wheel again
Rim, last machining makes finished product.Compared to low pressure casting method, squeeze casting method, forging method produces aluminum-alloy wheel, typically
Need more than nominal pressure thousands of tons of even ten thousand tons of large-tonnage forging equipment, its production procedure length, cost highest, but due to forging
Dense structure, wheel strength are high, under the conditions of intensity identical, forge wheel lighter than the weight for casting wheel.Although forging
Technical difficulty height, the fund input amount for making method is big, more and more both at home and abroad due to forging the advantage that wheel is lightweight, intensity is high
Factory start using forging method (utilizing forging equipment) manufacture aluminum-alloy wheel.
The content of the invention
The purpose of the present invention is to overcome the shortcomings of existing manufacturing technology, there is provided one kind can reduce equipment tonnage, reduce system
This rotation excellent suitability for press forming mould and rotation forging and molding method are caused, the production effect of aluminum-alloy wheel etc. can be effectively improved
Rate, reduces production cost.
To reach above-mentioned purpose, the rotation excellent suitability for press forming mould of the present invention is configured to, including upper mould and lower mould, by upper mould
Downward percussion action and the blank that is pointed on lower mould forged and pressed, the lower mould can be driven by a motor and vertically to rotate
Rotate centered on axis, the centrage of the upper mould is arranged obliquely relative to the vertical pivot center of the lower mould.
Rotated centered on vertical pivot center because lower mould can be driven by a motor, carry out the upper of descending punching press action
The centrage of mould is arranged obliquely relative to the vertical pivot center of lower mould, thus, it is possible to the rotation using lower mould is carried out to blank
Local rotation forging and stamping.Now, upper mould only acts on the sub-fraction of blank surface to the forming pressure of blank, thus can with compared with
Little plastic force realizes the shaping of large-size workpiece.Using the present invention, not only can realize on conventional little tonnage hydraulic
The forging and molding of large-size workpiece, replaces pressure to be its 20 times conventional forging equipment, and die life length, work noise
Little, energy consumption is low, and the manufacturing enterprise for being especially suitable for middle and small scale is produced.
In addition, upper mould is moved up and down carries out percussion action, thus, can be avoided by being driven rotation to lower mould
Up and down movable upper mould side structure is excessively complicated, and the action control for shaping is relatively easy to.
Of the invention preferably the upper mould is fixed on model fixing seat, is formed with seam on upper model fixing seat, it is described on
Mould is chimeric with the seam, and the bottom surface of the seam is formed as planar bevels inclined relative to above-mentioned vertical pivot center, described
The upper surface of upper mould is formed as the plane engaged with the bottom surface.
Thus, by the simple and reliable fixed upper mould in ground of the structure for enabling upper mould chimeric with seam, and using upper mould
Upper surface realizes positioning with the engagement of the bottom surface of seam, and the installation accuracy of upper mould is ensured in a simple and efficient manner.
It is of the invention preferably, be formed through the screw thread into concave up seam on the outer peripheral face of model fixing seat on described
Through hole, forms fluted on described on the outer peripheral face of mould, and the front end for screwing in the screw of the tapped through hole enters the groove.
So, it is possible to realize the fixation to upper mould using simple structure.
Of the invention preferably the lower mould is fixed on die shoe, and die shoe has the lower mould being fixed on press bed
Seat the latter half and the die shoe top half of the fixation lower mould, the die shoe top half can be driven by the motor
Move so as to rotate relative to the die shoe the latter half.
Of the invention preferred, the upper mould can freely be rotated centered on the vertical pivot center.
Of the invention preferred, the upper mould is arranged on press top shoe by upper model fixing seat, the upper model fixing seat energy
It is enough freely to be rotated centered on the vertical pivot center relative to the press top shoe.
Because motor drives lower mould to rotate, blank can be driven to rotate；The descending compacting blank of upper mould, its rubbing and blank between
Wiping power can make mould rotating in same direction.Upper mould is formed as the structure of passive rotation, is prevented from blank and upper model face produces relatively
Rub and cause the abrasion of mould and surface of the work.
The rotation excellent suitability for press forming mould of the present invention is particularly suitable as the shaping dies of aluminum-alloy wheel and carrys out forming said alloy
The invention further relates to a kind of rotate forging and molding method, the method uses the rotation excellent suitability for press forming of any of the above-described structure
Mould carries out excellent suitability for press forming to blank, during the excellent suitability for press forming is carried out, makes mould carry out percussion action, also, by motor
The lower mould is driven to rotate centered on vertical pivot center.
Using the method, the effect identical technique effect with description in above-mentioned rotation forge die is obtained in that.
In the rotation forging and molding method, lower mould can rotate by described in the motor Continuous Drive.
Due to being that mould is rotated under Continuous Drive, thus, forming efficiency is high and controls simple.
Description of the drawings
Fig. 1～4 are the shaping that aluminum-alloy wheel shaping is carried out using the rotation excellent suitability for press forming mould on press
The schematic diagram in each stage of journey, while being also shown for rotating the structure of excellent suitability for press forming mould in figure；
Fig. 5 is the accompanying drawing for representing upper mould and the mounting structure of upper model fixing seat.
Wherein, 1. press lower table, 2. die shoe the latter half, 3. die shoe top half, 4. descends mould outer body, 5.
Lower mould inner bulk, 6. ejector beam, 7a. aluminum alloy blanks, 7b, 7c. forging and stamping semi-finished product, 7d. forging and stamping finished products, 8. go up mould, 9. go up mould
Fixed seat, 10. plain thrust bearing, 11. roller bearings, mould base on 12., mould overcoat on 13., 14. press top shoes.
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawings.
Fig. 1～Fig. 4 is the shaping that aluminum-alloy wheel shaping is carried out using the rotation excellent suitability for press forming mould on press
The schematic diagram in each stage of process, while being also shown for rotating the structure of excellent suitability for press forming mould in figure.Fig. 5 for represent upper mould with it is upper
The accompanying drawing of the mounting structure of model fixing seat.The rotation excellent suitability for press forming mould is used to carry out the shaping of aluminum-alloy wheel, the rotation forging
Pressing formation mould includes upper die component and lower mold assemblies.
The upper die component includes upper mould 8 and upper model fixing seat 9, wherein, upper mould 8 is installed on model fixing seat 9, is installed
Afterwards, the centrage C1 of upper mould 8 (vertical) rotation axiss C2 relative tilt certain angles vertical with upper model fixing seat 9；Upper mould is consolidated
The top of reservation 9 is equipped with plain thrust bearing 10, and outside is equipped with double-row conical bearing 11, and by upper mould base 12 and upper mould
Overcoat 13 is fixed on press top shoe 14, realizes moving up and down under the driving of press top shoe 14.Plain thrust bearing 10
It is used to make upper model fixing seat 9 realize freely rotating centered on its rotation axis C2 with roller bearing 11.
As Fig. 5 is represented in detail, upper model fixing seat 9 has concave up seam 91, and the bottom surface 91a of seam 91a is formed
Be relative to upper model fixing seat 9 rotation axiss C2 incline predetermined angular (after mould 8 is installed, perpendicular to the centrage of upper mould 8
C1 planar bevels).Tapped through hole 92a is formed with the outer peripheral face 92 of upper model fixing seat 9, tapped through hole 92a is through to
Seam 91.Tapped through hole 92a is screwed in for screw 99 (referring to Fig. 1).
In addition, the upper surface 81 of upper mould 8 is formed as plane, mould 8 is embedded in the seam 91 of model fixing seat 9 on this
When, the upper surface 81 is engaged (play positioning action) with the bottom surface 91a of seam 91 so that the centrage C1 of upper mould 8 is solid with upper mould
The rotation axiss C2 of reservation 9 folds predetermined angular.The groove 82a of annular, the groove are formed with the outer peripheral face 82 of upper mould 8
82a is entered for the tip (front end) of above-mentioned screw 99, so as to realize the fixation to upper mould 8.
The lower mold assemblies include lower mould (4,5) and die shoe：Lower mould be split-type structural, including lower mould outer body 4 with
Lower mould inner bulk 5, the two is bolted on together, and lower mould outer body 4 is bolted on die shoe (specifically
Die shoe top half 3) on；Die shoe is made up of two parts, and its latter half is that die shoe the latter half 2 is fixed on press work
Make on platform, its top half is similar with upper die component by one group between die shoe top half 3 and die shoe the latter half 2
Plain thrust bearing and roller bearing it is (all not shown) realize connection, and by motor, reductor and belt it is (all not shown) drive
It is dynamic, lower mould can be driven to realize the rotation with its vertical pivot center C3 (with C2 actually straight lines) as axle.
Below the rotation forging and molding method to being carried out forming said alloy wheel using above-mentioned rotation excellent suitability for press forming mould is carried out
First, as shown in figure 1, aluminum alloy blank 7a is placed on lower mould (inner bulk 5), under making under the driving of motor
Mould is continuously rotated, also, makes to carry out punching press action shown in mould 8 along arrow in figure downwards.Due to the centrage C1 of upper mould 8
It is inclined relative to vertical direction (pressing direction), thus, what upper mould 8 was carried out to aluminum alloy blank 7a is local punching press (forging
What Fig. 2 and Fig. 3 was represented is the situation during forging and stamping, and aluminum alloy blank 7a is forged and pressed to forge and press semi-finished product 7b, 7c
Shape.When the shape of forging and stamping to the forging and stamping finished product 7d shown in Fig. 4, terminate forging and stamping, upper mould 8 withdraws upwards.Using vertically
Direction will forge and press finished product 7d jack-up through the ejector beam 6 of the central part of lower mould (4,5) so as to the demoulding.
Using above-mentioned embodiment, using the upper mould with vertical-rotation-axis relative tilt predetermined angular, continuously aluminum is closed
Golden blank carries out local rotation forging and stamping.Because upper mould only acts on the one of Forming Workpiece surface to the forming pressure of aluminum alloy blank
Fraction, therefore the shaping that large-size workpiece can be realized with less plastic force.Using present embodiment, not only can be
The forging and molding of aluminum-alloy wheel is realized on conventional little tonnage hydraulic, replaces pressure to be its 20 times conventional forging equipment, and
And die life length, work noise be little, energy consumption is low, the Factory production reflectal car of middle and small scale is especially suitable for
In addition, using above-mentioned embodiment, upper mould 8 is arranged in the inclined seam 91 of upper model fixing seat 9, by seam
91 and fastening screw 99 (jackscrew) realize positioning with fastening.Fastening screw 99 can be single or multiple.Upper mould is consolidated
The angle of inclination of the seam 91 (bottom surface 91a) of reservation 9 determine mould 8 install after angle, make connecing for model face and blank
Tactile region and lower mold portion die joint define the cross sectional shape of workpiece.The angle is ground into the pivot angle in shape, but this similar to pendulum
Unlike technique is ground from pendulum：1. upper mould does not swing, only rotates in this technique；2. this technique can be used on common forging equipment.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
For example, in the above-described embodiment, to manufacture wheel as a example by be illustrated, however, the present invention can also be suitable for
In the shaping of the part of other shapes that are centrosymmetric.
In addition, in the above-described embodiment, the groove of annular is formed in the outer peripheral face of upper mould, however, the shape of groove is simultaneously
Not limited to this, are not yet may be used for annular.
In addition, in the above-described embodiment, lower mould is made continuously to rotate during excellent suitability for press forming, it may, however, also be
Upper mould is completed after the percussion action of stipulated number (1 time or multiple), makes lower mould rotate predetermined angular.