CN103464561B - A kind of shaping dies of skin part for airplane - Google Patents
A kind of shaping dies of skin part for airplane Download PDFInfo
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- CN103464561B CN103464561B CN201310233963.1A CN201310233963A CN103464561B CN 103464561 B CN103464561 B CN 103464561B CN 201310233963 A CN201310233963 A CN 201310233963A CN 103464561 B CN103464561 B CN 103464561B
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Abstract
A shaping dies for skin part for airplane, it comprises: compact heap, punch, die, blank holder and pressing plate.Punch comprises vertical wall section and shaped portion; Negative mold has the cavity for holding blank and liquid; Blank holder comprises blank holder and lower blank holder, and wherein, lower blank holder is positioned on die in the vertical slidably, and it has the second hollow space of the up/down perforation suitable with lower vertical wall section; Upper blank holder is removably fixed on lower blank holder, it has the first hollow space of up/down perforation, and upper blank holder is used for removably being connected with the second pressurized source upper blank holder and lower blank holder pressure are put at die by the second pressurized source when compact heap and punch pass from the first hollow space and the second hollow space and form the blank in the cavity of die with the shaped portion of punch successively under the effect of the first pressurized source.The present invention effectively reduces the resilience after part forming, improves forming accuracy and surface quality.
Description
Technical field
The invention belongs to metal-pressed machine technical field, particularly relate to a kind of shaping dies of skin part for airplane.
Background technology
Covering is the important vital part forming Aerodynamic Configuration of Aireraft, because covering is direct and air flow contacts, the in-flight directly stressed and power transmission of participation, therefore the manufacture of skin part not only has profile accurately and the requirement of mechanical performance index, also has the strict demand of surface quality.Skin part is mainly according to factors such as part shape, size, material, thickness, and main forming process comprises drop forming, press-brake forming, roll forming, pull-shaped shaping and traditional drawing and forming etc.
Tradition falls compression technology shaping thin skin, is shaped with convex, the recessed upper and lower mould of routine, its forming technology flow process: blanking-deburring-quenching-drop forming-metal pattern school shape-shearing clout.The surface quality of workpieces of this process processing is difficult to reach designing requirement, there is following shortcoming: the easy resilience of compacted part in part manufacture, and after the pressure that falls, school shape is very difficult, and part shrinkage is poor, and the gauffer of formation cannot be eliminated; Fall pressure after surface quality of workpieces and the profile degree of accuracy poor; Fall to pressing that part stress is uneven very easily makes plate unstability, thus occur agitating and buckling deformation.
In nearly decades, liquid-filling shaping technology is developed rapidly.Liquid-filling shaping refers to and adopts liquid to replace punch or the die of rigidity as power transmission medium; blank is fitted punch or die and be shaped under the effect of power transmission medium; between punch and blank surface, produce fluid lubrication simultaneously; reduce harmful frictional resistance; thus the forming limit of sheet material is greatly improved, high-quality workpiece can be obtained.Liquid-filling shaping technology is applied in the manufacture of aircraft skin part forming, effectively can solves complex-curved Skin Parts forming quality problem.Present passive type liquid-filling shaping adopts die for liquid chamber structure completely, although effectively can reduce reduction.But for complex thin-wall curved surface covering, because die entrance porch has " rigid constraint " to act on unlike traditional drawing, easily make blank occur unsettled and cause wrinkling, and defect is difficult to control.
As can be seen here, for the manufacture of aircraft covering, conventional manufacturing process all deposits this certain limitation, such as:
1, according to traditional compression technology that falls to the covering that is shaped, then the easy resilience of part, after the pressure that falls, school shape is very difficult, after the pressure that falls surface quality of workpieces and the profile degree of accuracy poor, fall to pressing that part stress is uneven very easily makes plate unstability, thus occur agitating and buckling deformation.
2, according to rubber pocket covering forming technology, although only need half contour forming, the easy resilience of part after rubber pocket is shaped, and also springback capacity is wayward, brings very large impact to the forming accuracy of part.
3, according to longitudinal pull-shaped forming technology, be then relatively applicable to large-scale skin part and be shaped, but larger stretcher strain amount usually makes skin-surface occur skid wire or coarse-grain and cause covering to scrap, and have impact on surface quality and the profile accuracy of covering.
4, according to traditional drawing and forming technique, then for problems such as dark chamber part skin part can bring complex procedures, work step various.And the cold drawn dark ratio of material is little, and after being shaped, resilience is comparatively large, needs to increase school shape operation and solve.
5, according to general liquid-filling shaping technique, then die adopts complete liquid chamber structure, can improve the material forming limit, effectively reduce reduction.But, for complex thin-wall curved surface covering part, easily cause wrinkling at unsettled place, wayward.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide the shaping dies of the skin part for airplane that a kind of product shaping performance is good, operation is few, forming accuracy is high.
Particularly, the shaping dies of this skin part for airplane comprises: compact heap, punch, die, blank holder and pressing plate.
More specifically, compact heap is squarely roughly, compact heap comprises that surface from it upwards protrudes out, for being connected with the first pressurized source die shank, punch comprises vertical wall section and shaped portion, to make the longitudinal axis of die shank, compact heap and punch align on the vertical wall section that compact heap is detachably fixed to punch; Negative mold has the cavity for holding blank and liquid, cavity is at least limited by the first annular wall suitable with the vertical wall section of punch, second annular wall suitable with the shaped portion of punch from the first annular wall to downward-extension and the 3rd annular wall from the second annular wall to downward-extension, and die also has the outage and inlet opening that are communicated with layer Cavity Flow; Blank holder comprises blank holder and lower blank holder, wherein, lower blank holder roughly becomes tabular, be positioned at slidably in the vertical on die, its have the up/down perforation suitable with the vertical wall section of punch the second hollow space and be communicated with the second hollow space and with compact heap suitable, in a longitudinal direction for the locating slot of position housing piece; Upper blank holder is removably fixed on lower blank holder, it becomes tabular, have the first hollow space of up/down perforation, upper blank holder is used for removably being connected with the second pressurized source upper blank holder and lower blank holder pressure are put at die by the second pressurized source when compact heap and punch pass from the first hollow space and the second hollow space and form the blank in the cavity of die with the shaped portion of punch successively under the effect of the first pressurized source.
Cuboid body structure is roughly become after this die assembly.The bottom of compact heap is roughly cube structure, fluted below cube structure, coordinates guiding for post gap is inserted on punch top.Compact heap top has die shank, and die shank is connected with the first pressurized source, and wherein, this first pressurized source is hydraulic press master cylinder.Compact heap is connected with the counter sink bolt of punch by four vertical directions, and wherein, bolt hole is through hole in the part of compact heap, and threaded portion is arranged in punch.
Upper blank holder is roughly rectangular body structure, and there is the first hollow space centre, is convenient to after flanging operation, compact heap and punch descending through forming operation, wedge angle is cut away in the equal machined of surrounding.Upper blank holder is outer is along the circumferential direction angularly provided with six metric coarse thread bolts hole, is connected with the second pressurized source by six hexagon socket head cap screws, and wherein this second pressurized source is hydraulic press flanging cylinder, by flanging cylinder power transmission flanging.Go up in the middle of blank holder simultaneously and be connected with lower blank holder by four counter sink bolts, wherein bolt hole is set to through hole in upper blank holder part, and its threaded portion is arranged in lower blank holder.Lower blank holder is roughly rectangular structure, and centre is the second hollow space, is provided with four bolts hole, is convenient to be connected with upper blank holder in the middle of upper surface.The shape of the second middle hollow space is consistent with the vertical wall section external surface shape of punch.In addition, the wall of restriction second hollow space of lower blank holder and the lower wall surface of lower blank holder seamlessly transit, particularly, the second hollow space is provided with along lower blank holder bottom surface section the fillet smoothly transitted, and the object arranging this fillet is the initial anti-inflation effect being conducive to shaping initial stage liquid.Also be provided with to be communicated with the second hollow space and with compact heap suitable, in a longitudinal direction for leading and the locating slot of position housing piece, particularly, the top of the second hollow space is located at by this locating slot, for square cavity configuration, its cube structure being convenient to compact heap enters wherein so that matched in clearance each other.This locating slot limited by inwall along its length and in the width direction, wherein the matched in clearance slidably of outer wall along its length of inner wall section along its length and compact heap, for located lateral.The outer wall in the width direction of this locating slot inner wall section in the width direction and compact heap also keeps matched in clearance slidably, for longitudinal register.
Die is roughly rectangular structure, and bottom is provided with step in the width direction, and step is provided with six equidistant metric screw bolts hole, is fixedly connected by six hexagon socket head cap screws and die holder.Be cavity liquid chamber in the middle of die, the external surface shape of the shape of cavity and the vertical wall section of punch is basically identical, and cavity bottom and die lower surface have certain distance simultaneously.Die front portion is provided with inlet opening and outage, and inlet opening and outage all get through cavity inner wall surface.Die upper surface is the die joint after punch, blank holder, die matched moulds.With general passive liquid-filling shaping mould unlike, cavity liquid chamber in the middle of die is not straight wall liquid chamber completely, but the part female mould structure of similar traditional drawing is had in die upper surface porch, after this structure curved surface and matched moulds, punch shaped portion curved surface matches, and the two gap uniformity.
Pressing plate is used for position-limiting action, and be connected by the lower wall surface of counter sink bolt with the restriction locating slot of lower blank holder, wherein counter sink is through hole in pressing plate, and screwed hole is arranged in lower blank holder.The Main Function arranging this pressing plate is: in punch idle running, prevents the part female mould structure of this punch and die from gnawing mould when preventing punch travel excessive.
Be provided with guide between die and lower blank holder, it longitudinally slides for making the relative die of lower blank holder, and particularly, this guide is alignment pin.Therefore, correspondingly, dowel hole is arranged with at die upper surface and lower blank holder lower surface across corner.Aforementioned alignment pin, by being used for locating with die hole on upper surface interference fit, is used for locating and leading by coordinating with lower blank holder lower surface interporal lacuna.
A using method for the shaping dies of skin part for airplane, mainly comprises the steps:
When step 1, die assembly, be fixed and clamped block and punch, fixing upper blank holder and lower blank holder, and navigated on die by lower blank holder longitudinally-slidablely.Particularly, by fastening for the securing member that compact heap and punch pass through such as counter sink bolt, by fastening for the securing member that pressing plate and lower blank holder pass through such as counter sink bolt, the securing member that upper blank holder and lower blank holder pass through such as counter sink bolt is fastening, and lower blank holder and die are led by the guide positions of such as alignment pin.
Step 2, connect the first pressurized source to die shank, connect the second pressurized source to upper blank holder, and by compact heap and punch, blank holder and die separately.Particularly, first pressurized source of such as hydraulic press master cylinder goes downwards to above die shank together with the second pressurized source of such as hydraulic press flanging cylinder, the die shank of compact heap and master cylinder are cut somebody's hair and to be connected by the securing member of such as bolt, the push pedal of flanging cylinder comes downwards to blank holder upper surface, the securing member of upper blank holder by such as hexagon socket head cap screw is connected with the push pedal of flanging cylinder, hydraulic press flanging cylinder is retracted into hydraulic press master cylinder sustained height, hydraulic press master cylinder and hydraulic press flanging cylinder again together with return, by compact heap and punch, blank holder and die separately.
Step 3, by inlet opening oiling, place blank.
Step 4, hydraulic press flanging cylinder are descending, realize flanging operation.
Step 5, hydraulic press master cylinder are descending, are pressurizeed by hydraulic press pressurized cylinder, complete initial anti-inflation operation in early stage.
Step 6, hydraulic press master cylinder continue descending, descending according to predetermined punch travel, and the pressure of the cavity liquid chamber of die continues to increase simultaneously, finishing drawing forming process.
Step 7, the pressure release of hydraulic press pressurized cylinder, by outage oil extraction.
Step 8, hydraulic press master cylinder are up, and hydraulic press flanging cylinder is return, and make punch and blank holder leave die.
Blank after step 9, taking-up are shaped.
Step 10, later stage check and machined.
Advantage of the present invention and good effect are:
(1) shaping dies of skin part for airplane provided by the invention utilizes part former liquid-filling shaping to replace traditional drop forming, roll forming, pull-shaped shaping and traditional drawing and forming.Utilize highly pressurised liquid to make workpiece carry out Plastic Forming, compared with traditional drawing and forming, improve the forming limit of dark chamber covering, reduce number of drawing, reduce process number and mould number, reduce expense.
(2) the present invention utilizes highly pressurised liquid to carry out Plastic Forming, utilize " fluid lubrication " and " friction keeps " effect in forming process, improve forming accuracy and surface quality, solve traditional drop forming and skinning surface be shaped in surface quality of workpieces and the poor problem of profile precision.
(3) the present invention utilizes highly pressurised liquid to act on blank surface, keeps loading cavity liquid chamber pressure, effectively reduce the resilience after part forming, solve the impact of the forming accuracy that rubber pocket covering Form springback brings by the later stage.
(4) the present invention carries out Plastic Forming by highly pressurised liquid, improves globality and the plyability of part, reduces subsequent soldering processes to the impact of part performance;
(5) mould of the present invention utilizes part female mould structure to combine advantage and traditional drawing and forming " rigid constraint " advantage of " friction keeps " and " fluid lubrication " that liquid-filling shaping has.Improve the forming limit of covering on the one hand, greatly reduce reduction; On the other hand, prevent the phenomenon that the complex-curved covering that occurs in general passive type liquid-filling shaping is unsettled, effectively reduce the defect that part overhanging portion is wrinkling.
(6) mold use method of the present invention first carries out flanging operation, the pressure reloading cavity liquid chamber is initially anti-inflation to carry out, then drawing sequence is carried out while increasing the pressure of cavity liquid chamber, and utilize part female mould structure to carry out " rigid constraint " blank liquid-filling shaping, complete the former liquid-filling shaping process of skin part for airplane thus.Mould of the present invention can reduce number of drawing, reduce the forming limit basis of process number and mould number being improved dark chamber covering, reduce the wrinkling defect in covering suspension area simultaneously effectively, there is part integrity and plyability is good, forming accuracy and surface quality is high, be shaped after the advantages such as resilience is little.
Accompanying drawing explanation
In order to explain the present invention, its illustrative embodiments will be described with reference to the drawings hereinafter, in accompanying drawing:
Fig. 1 is the perspective view of shaping dies of the present invention;
Fig. 2 is the vertical structure sectional view after shaping dies of the present invention assembling;
Fig. 3 is the perspective view of shaping dies compact heap of the present invention and punch;
Fig. 4 is the perspective view of blank holder on shaping dies of the present invention;
Fig. 5 is the perspective view of blank holder and pressing plate under shaping dies of the present invention;
Fig. 6 is the perspective view of shaping dies die of the present invention and alignment pin;
Fig. 7 is the flow chart of steps of the using method of shaping dies of the present invention.
Similar features in different figure is indicated by similar Reference numeral.
Detailed description of the invention
In the detailed description of following embodiment, the accompanying drawing with reference to the part forming this description is described.Accompanying drawing shows specific embodiment in an illustrative manner, and the present invention is implemented in these embodiments.Shown embodiment is not in order to limit is according to all of the embodiments of the present invention.Be appreciated that other embodiment can be utilized, change that is structural or logicality can be made without departing from the scope of the present invention.For accompanying drawing, the term of directionality, such as D score, " on " etc., the orientation with reference to described accompanying drawing uses.Because the assembly of embodiments of the present invention can be implemented by with multiple orientation, these directional terminology be for illustration of object, instead of restriction object.Therefore, following detailed description of the invention is not the meaning as restriction, and scope of the present invention limited by appending claims.
As depicted in figs. 1 and 2, disclose a kind of former liquid-filling shaping mould of skin part for airplane, be roughly cuboid box body structure, mainly comprise this few part of compact heap 1, punch 2, blank holder and die 5.Particularly, blank holder comprises blank holder 3 and lower blank holder 4.
Particularly, the bottom of compact heap 1 is roughly cube structure 11, and cube structure 11 offers groove 12 below, and punch 2 top is inserted post gap and coordinated, for located lateral by this groove 12.The top of compact heap 1 has upwards protruded out die shank 10, die shank 10 and the first pressurized source, namely hydraulic press master cylinder cut somebody's hair connected.Punch 2 comprises vertical wall section 13 and shaped portion 14.Compact heap 1 and punch 2 are by securing member, and such as four counter sink bolts 6 are connected, and wherein bolt hole is through hole in compact heap 1 part, and threaded portion is in punch 2.By this, compact heap 1 is detachably fixed on the vertical wall section 13 of punch 2, aligns to make the longitudinal axis of die shank 10, compact heap 1 and punch 2.
As shown in Figure 4 and Figure 5, blank holder comprises blank holder 3 and lower blank holder 4 two parts, and these two parts become tabular substantially.As shown in Figure 4, upper blank holder 3 is roughly rectangular body structure, and there is the first hollow space of up/down perforation centre, is convenient to after flanging operation, and compact heap 1 and descending the extending there through of punch 2 form operation, and wedge angle is cut away in the equal machined of surrounding.Upper blank holder 3 is outer is along the circumferential direction provided with six metric coarse thread bolts hole, and by six hexagon socket head cap screws 7 and the second pressurized source, namely the push pedal of hydraulic press flanging cylinder is connected, by flanging cylinder power transmission flanging.Meanwhile, the securing member by four such as counter sink bolts 6 in the middle of upper blank holder 3 is connected with lower blank holder 4, and the bolt hole wherein matched with this bolt 6 is through hole in upper blank holder 3 part, and its threaded portion is arranged in lower blank holder 4.As shown in Figure 5, lower blank holder 4 is also roughly rectangular structure, and centre is the second hollow space 15 of up/down perforation, and the centre of upper surface is provided with four screwed holes, is convenient to be connected with upper blank holder 3.The external surface shape of the vertical wall section 13 of the second hollow space 15 shape and punch 2 is basically identical, be transitioned into the lower wall surface of lower blank holder 4 with limiting the interior walls be smooth of the second hollow space 15, particularly, circumferentially be smoothly transitted into the lower surface of lower blank holder 4 by this second hollow space 15 of level and smooth fillet, the initial anti-inflation effect that blank holder fillet is convenient to shaping initial stage liquid is set.Cavity 15 upper part is also provided with locating slot 16, and the cube structure 11 being convenient to compact heap 1 can enter post gap and coordinate guide-localization.Locating slot 16 inner wall section along its length coordinates, for located lateral with the outer wall glade plane space of compact heap 1 length direction.Locating slot 16 inner wall section in the width direction and compact heap 1 outer wall glade plane space in the width direction coordinates, for longitudinal register.Locating slot 16 forms whole cavity in the middle of lower blank holder together with the second hollow space 15.
As shown in Figure 6, die 5 is roughly rectangular structure, and bottom is provided with ledge structure 22 in the width direction, and step is provided with six equidistant metric screw bolts hole, is fixedly connected by six hexagon socket head cap screws 7 and die holder.The centre of die 5 has the cavity 19 for receiving fluids, and the shape of the shape of cavity 19 and vertical wall section 13 outer surface of punch 2 is basically identical, simultaneously the bottom of cavity 19 and the spaced apart predetermined distance of lower surface of die 5.Particularly, this cavity 19 is at least limited by the first annular wall suitable with the vertical wall section 13 of punch 2, second annular wall suitable with the shaped portion 14 of punch 2 from the first annular wall to downward-extension and the 3rd annular wall from the second annular wall to downward-extension.The front portion of die 5 is provided with inlet opening 21 and outage 20, and inlet opening 21 and outage 20 all fluid are communicated to the inner wall surface of cavity 19.The upper surface of die 5 is the die joint after punch, blank holder and die matched moulds.With general passive liquid-filling shaping mould unlike, cavity 19 in the middle of die 5 is not straight wall liquid chamber completely, but there is in the porch of the upper surface of die 5 the part female mould structure 18 of similar traditional drawing, after this structure curved surface and matched moulds, shaped portion 14 curved surface of punch 2 matches, and the two gap uniformity.
Pressing plate 8 is for position-limiting action, and be connected with lower blank holder 4 locating slot 16 lower surface by the securing member of such as counter sink bolt 6, wherein counter sink is through hole in pressing plate 8, and screwed hole is in lower blank holder 4.The Main Function of this pressing plate 8 be to prevent when punch 2 is in idle running compact heap 1 and punch 2 stroke excessive to such an extent as to gnaw mould with the part female mould structure 18 of die 5.
Be respectively equipped with dowel hole in the diagonal angle part of the upper surface of die 5 and the lower surface of lower blank holder 4, correspondingly, the hole on upper surface interference fit of alignment pin 9 and die 5, for location, coordinates for locating and leading with the lower surface interporal lacuna of lower blank holder 4.One of ordinary skill in the art will readily recognize that this alignment pin 9 can by other for make lower blank holder 4 relatively die 5 longitudinally sliding guide piece substitute.
A former liquid-filling shaping mold use method for skin part for airplane, specifically comprises the steps:
When step 1, die assembly, be fixed and clamped block 1 and punch 2, fixing upper blank holder 3 and lower blank holder 4, and navigated on die 5 by lower blank holder 3 longitudinally-slidablely.Particularly, by fastening by the securing member of such as counter sink bolt 6 to compact heap 1 and punch 2, pressing plate 8 is fastening by the securing member of such as counter sink bolt 6 with lower blank holder 4, the securing member that upper blank holder 3 and lower blank holder 4 pass through such as counter sink bolt 6 is fastening, and lower blank holder 4 leads with the guide positions of die 5 by such as alignment pin 9.
Step 2, connect the first pressurized source to die shank, connect the second pressurized source to upper blank holder, and by compact heap 1 and punch 2, blank holder, die 5 separately.Particularly, the mold integral of general assembly is discharged on work top, first pressurized source of such as hydraulic press master cylinder goes downwards to above die shank 10 together with the second pressurized source of such as hydraulic press flanging cylinder, the die shank 10 on compact heap 1 and hydraulic press master cylinder is cut somebody's hair to be connected by the securing member of such as bolt.The push pedal of hydraulic press flanging cylinder comes downwards to the upper surface of blank holder 3, is connected by the securing member of upper blank holder 3 by such as hexagon socket head cap screw 7 with the push pedal of hydraulic press flanging cylinder.Hydraulic press flanging cylinder is retracted into hydraulic press master cylinder sustained height, hydraulic press master cylinder and hydraulic press flanging cylinder again together with return, by compact heap 1 and punch 2, the blank holder be made up of upper blank holder 3 and lower blank holder 4 and die 5 separately.
Step 3, in die 5 cavity liquid chamber 19, filled the liquid of such as hydraulic oil by inlet opening 21, then blank is placed on die 5 surface, makes blank be positioned at die 5 centre position as far as possible.
Step 4, hydraulic press master cylinder are descending until the lower surface of punch 2 is positioned at the above predetermined altitude of blank together with hydraulic press flanging cylinder.Hydraulic press flanging cylinder is descending, by determining blank space or determining pressure-pad-force, carries out flanging operation.
Step 5, hydraulic press master cylinder are descending, drive punch 2 descending, when the lower surface of punch 2 is positioned at certain initial anti-inflation height above blank, the supercharging of hydraulic press pressurized cylinder makes the liquid chamber pressure of die 5 reach initial anti-inflation pressure, and keeping certain hour constant, blank completes initial anti-inflation operation in early stage.
It is descending that step 6, hydraulic press master cylinder continue descending drive punch 2, and according to the predetermined descending drawing of punch travel curve, liquid chamber pressure increases according to the loading curve arranged and finally reaches maximum liquid chamber pressure simultaneously.Drawing under " rigid constraint " effect of part female mould structure 18, when the vertical wall section 13 of punch 2 and the interface of shaped portion 14 overlap with die upper surface, completes forming process.
Step 7, the pressure release of hydraulic press pressurized cylinder, the oil in the cavity liquid chamber of die 5 is discharged by outage 20.
Step 8, hydraulic press master cylinder are up, and drive punch 2 up, hydraulic press flanging cylinder is return, and drive blank holder up.After hydraulic press master cylinder and hydraulic press flanging cylinder fall back on sustained height, hydraulic press master cylinder and hydraulic press flanging cylinder again together with up.Punch 2 and blank holder is made to leave die 5.
Blank after step 9, taking-up are shaped.
Step 10, according to part forming performance need, can to modulate part or the heat treatment step such as quenching, to carry out later stage inspection or a small amount of school shape, and cut profile by machined, obtain the workpiece of final required size.
The those skilled in the art of those the art can pass through research description, disclosed content and accompanying drawing and appending claims, understand and implement other changes to the embodiment disclosed.In the claims, word " comprises " element and step of not getting rid of other, and wording " one " does not get rid of plural number.In the practical application of invention, the function of the multiple technical characteristics quoted during a part possibility enforcement of rights requires.Any Reference numeral in claim should not be construed as the restriction to scope.
The present invention is limited to the illustrative embodiments presented in the specification and illustrated in the drawings never in any form.All combinations of the embodiment (part) illustrated and describe are interpreted as clearly to be incorporated within this description and to be interpreted as clearly and fall within the scope of the present invention.And in the scope of the present invention that such as claims are summarized, a lot of distortion is possible.In addition, any reference marker in claims should be configured to limit the scope of the invention.
Claims (9)
1. a shaping dies for skin part for airplane, is characterized in that, described shaping dies comprises: compact heap (1), punch (2), die (5), blank holder and pressing plate (8), wherein:
Described compact heap (1) roughly squarely, described compact heap (1) comprises that surface from it upwards protrudes out, for being connected with the first pressurized source die shank (10), described punch (2) comprises vertical wall section (13) and shaped portion (14), to make the longitudinal axis of described die shank (10), described compact heap (1) and described punch (2) align on the vertical wall section (13) that described compact heap (1) is detachably fixed to described punch (2);
Described die (5) has the cavity (19) for holding blank and liquid, described cavity (19) is at least limited by the first annular wall, second annular wall suitable with the shaped portion (14) of described punch (2) from described first annular wall to downward-extension and the 3rd annular wall from described second annular wall to downward-extension that the vertical wall section (13) with described punch (2) is suitable, and described die (5) also has the outage (20) and inlet opening (21) that are communicated with described cavity (19) fluid;
Described blank holder comprises blank holder (3) and lower blank holder (4), wherein, described lower blank holder (4) roughly becomes tabular, be positioned on described die (5) in the vertical slidably, its have the up/down perforation suitable with the vertical wall section of described punch (2) (13) the second hollow space (15) and be communicated with described second hollow space (15) and with described compact heap (1) suitable, in a longitudinal direction for locating the locating slot (16) of described compact heap (1), described upper blank holder (3) is removably fixed on described lower blank holder (4), it becomes tabular, there is the first hollow space of up/down perforation, described upper blank holder (3) for the second pressurized source be removably connected to make when described compact heap (1) and described punch (2) under the effect of described first pressurized source successively from described first hollow space and described second hollow space (15) through and with the shaped portion of described punch (2) (14), the blank in the cavity (19) of described die (5) is formed time described in the second pressurized source described upper blank holder (3) and described lower blank holder (4) pressed put in described die (5),
Wherein, the cavity (19) of described die (5) is formed with female mould structure (18) in the porch of the upper surface of described die (5), the shaped portion (14) of described female mould structure (18) and described punch (2) suitable and the two be evenly spaced apart.
2. the shaping dies of skin part for airplane according to claim 1, is characterized in that, described first pressurized source is hydraulic press master cylinder.
3. the shaping dies of skin part for airplane according to claim 1, is characterized in that, described second pressurized source is hydraulic press flanging cylinder.
4. the shaping dies of skin part for airplane according to claim 1, it is characterized in that, wall and described lower blank holder (4) lower wall surface of described second hollow space of the restriction (15) of described lower blank holder (4) seamlessly transit.
5. the shaping dies of skin part for airplane according to claim 1, it is characterized in that, the bottom of described compact heap (1) offers groove (12), the outer wall matched in clearance of the inwall of the described groove of restriction (12) of described compact heap (1) and the vertical wall section (13) of described punch (2).
6. the shaping dies of skin part for airplane according to claim 1, it is characterized in that, the inwall of the described locating slot of restriction (16) of described lower blank holder (4) coordinates with the outer wall glade plane space of described compact heap (1).
7. the shaping dies of skin part for airplane according to claim 1, it is characterized in that, be provided with guide between described die (5) and described lower blank holder (4), it longitudinally slides for making the relatively described die (5) of described lower blank holder (4).
8. the shaping dies of skin part for airplane according to claim 7, it is characterized in that, described guide is for being fixed at least two alignment pins of the upper surface of described die (5), correspondingly, the lower surface of described lower blank holder (4) has and the hole of shape adaptation consistent with the quantity of described alignment pin.
9. the shaping dies of skin part for airplane according to claim 1, it is characterized in that, the upper surface of the restriction locating slot (16) of described lower blank holder is also fixed with pressing plate (8), and it is for preventing punch (2) stroke in idle running excessive to such an extent as to gnawing mould with the female mould structure (18) of described die (5).
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| CN109454144A (en) * | 2018-10-31 | 2019-03-12 | 天津天锻航空科技有限公司 | A kind of liquid-filling shaping technique for rocket fuel reserve tank part |
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| CN104289602B (en) * | 2014-09-29 | 2018-01-09 | 北京航星机器制造有限公司 | Moveable-combined type hot forming flanging die and application method |
| CN105033585A (en) * | 2015-08-03 | 2015-11-11 | 江西洪都航空工业集团有限责任公司 | Double-curved-surface sawtooth skin manufacturing method capable of controlling gap clearance precisely |
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| CN103464561A (en) | 2013-12-25 |
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