CN107649590A - A kind of skinning surface mould and its pull-shaped method - Google Patents
A kind of skinning surface mould and its pull-shaped method Download PDFInfo
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- CN107649590A CN107649590A CN201710939493.9A CN201710939493A CN107649590A CN 107649590 A CN107649590 A CN 107649590A CN 201710939493 A CN201710939493 A CN 201710939493A CN 107649590 A CN107649590 A CN 107649590A
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- pressing plate
- mould
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 230000006978 adaptation Effects 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 104
- 238000003856 thermoforming Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 29
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 238000003754 machining Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 208000010727 head pressing Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
- B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of pull-shaped mould, particularly a kind of pull-shaped mould of titanium alloy covering, belong to titanium alloy hyperbolicity sheet metal part forming technique field；The device includes the punch-pin mechanism being fixed on stretch-forming device and is fixed on the die mechanism that can be moved up and down on stretch-forming device; the punch-pin mechanism and die mechanism have the curved surface of adaptation to ensure punch-pin and cavity plate local gap uniformity, so that it is guaranteed that material flows uniformity in shaping；The present invention solves the problems, such as conventional titanium alloy hyperbolicity covering class part processing difficulties, utilize the characteristic of titanium alloy material, the pull-shaped technique of covering class part is realized using hot formed mode, effectively evade the problem of conventional art serious corrugation occurs using impact style, mould is not pasted in type face, the processing problem for solving space flight and aviation titanium alloy covering class part.
Description
Technical field
The present invention relates to a kind of pull-shaped mould and pull-shaped method, particularly a kind of skinning surface mould and its pull-shaped method,
Belong to the pull-shaped technical field of titanium alloy covering.
Background technology
Titanium alloy material has the characteristics that intensity is high, in light weight, corrosion-resistant, is widely applied in aviation field.Due to titanium
Sheet alloy just has preferable plasticity at high temperature, and the profile under normal temperature differs change, so to titanium alloy plate, especially
Covering class part is pull-shaped to require higher, and the pull-shaped technique of titanium alloy covering is a problem always in current technology, from adding
Work efficiency rate, the precision of molding part all do not reach preferably state.
In the design of aircraft skin, aircraft skin refers to be enclosed in outside airframe structure and consolidated with bonding agent or rivet
Due on skeleton, the dimension shape component of airplane aerodynamic profile is formed.The stressed-skin construction that aircraft skin and skeleton are formed have compared with
Large bearing capacity and rigidity, and it is very light to conduct oneself with dignity, and plays a part of bearing and transmitting aerodynamic loading.Covering bears aerodynamic effect
Active force is delivered on connected fuselage wing skeleton afterwards, stress is complicated, and covering directly contacts with the external world in addition, so not only
It is required that skin material intensity is high, plasticity is good, also requires that surface is smooth, there is higher resistance to corrosion.
With reference to above-mentioned requirements and the characteristic of titanium alloy material itself, it is necessary to which a kind of pull-shaped effect is good, it is pull-shaped after covering zero
Part is not in serious weak points, the effective pull-shaped technique for ensureing the pull-shaped effect of titanium alloy covering and production efficiency and
Pull-shaped mould.
The content of the invention
The goal of the invention of the present invention is：For above-mentioned problem, there is provided one kind solves current titanium alloy covering class
The serious corrugation of part forming appearance and the problem of not pasting mould, skin material assembly precision is high, and pull-shaped effect is good, pull-shaped rear covering zero
The pull-shaped technique and pull-shaped mould that part quality is good, precision is high.
The technical solution adopted by the present invention is as follows：
A kind of skinning surface mould, including the punch-pin mechanism being fixed on stretch-forming device and be fixed on stretch-forming device can be upper and lower
There is the curved surface being adapted to ensure that punch-pin and cavity plate local gap are uniform for mobile die mechanism, the punch-pin mechanism and die mechanism
Unanimously, so that it is guaranteed that material flows uniformity in shaping.
Specifically, the device it is pull-shaped be located under 650 DEG C -700 DEG C of environment temperature carry out it is pull-shaped.
A kind of skinning surface mould of the present invention, carries out pull-shaped, the party in structure design by the way of cavity plate moves down
Formula using it is different from routine techniques when it is pull-shaped using the movement of cavity plate, moulded in the event of high temperatures by titanium alloy covering material
Property good, easily shaping, the effective precision for lifting the covering class part especially skin part of airplane skin, in the pull-shaped mould,
It is once-forming, the difficulty of processing of titanium alloy is not only solved, while ensure machining accuracy.In addition, originally it is that invention is to treat covering
Workpiece is assemblied on cavity plate, and using the movement of cavity plate, covering workpiece to be added being fitted on punch-pin progressively, which can
Skin material is avoided thin the problem of occur.In traditional handicraft, during punch-pin drive covering workpiece to be added moves up, skin material
It is unfavorable in Stretch Forming Process with stress, and need cavity plate to coordinate with punch-pin and squeeze into one step forming all the time at the contact point of punch-pin
In the even results of covering class part integral thickness.In the design, the consideration in the problem, combined using different modes high
The environment of temperature makes covering workpiece to be added be fitted in well on punch-pin, and is to ensure during punch-pin coordinates with cavity plate
The surface flatness of skin material, while the situation of wrinkle is avoided the occurrence of, even more avoid covering workpiece to be added in Stretch Forming Process from drawing
The problem of splitting.
A kind of skinning surface mould of the present invention, the punch-pin mechanism include the removable bottom being fixedly connected on stretch-forming device
Plate and the punch-pin being arranged on bottom plate, the punch-pin have displacement moving up and down under the active force of stretch-forming device.The party
The design of formula is in order to coordinate die mechanism to move down, during cooperation, when die mechanism moves down into certain position, in active force
Under, punch-pin can move up, so that it is guaranteed that the pull-shaped effect of covering workpiece to be added.Ensure that covering is to be added using the small distance movement of punch-pin
It is more uniformly stressed on workpiece, the quality of covering class part is effectively ensured.
Further, the more leads being fixedly connected are provided with the bottom plate, is provided with punch-pin and matches somebody with somebody with lead
The pilot hole of conjunction, it can be moved up along lead by pilot hole in the active force lower punch of stretch-forming device.Which can be entered
The machining accuracy of the guarantee covering workpiece to be added of one step, is advantageous to the further shaping of workpiece to be added.
Further, multiple jogger holes that can run through stretch-forming device push rod are offered on the bottom plate, under die mechanism
Stretch-forming device push rod withstands punch-pin by jogger hole during pressure, punch-pin is contacted with plate.By matching somebody with somebody for push rod and jogger hole
Close, during die mechanism pushes, push rod can make punch-pin is micro to move up.
Further, the bottom plate is additionally provided with lifting bolt.
A kind of skinning surface mould of the present invention, the die mechanism are included with recessed with the curved surface of punch-pin authority match
Mould, the cavity plate are provided with the press plate mechanism for clamping covering workpiece to be added.
Further, the press plate mechanism includes more block pressur plates, and the pressing plate is fixed covering workpiece to be added by connector
On cavity plate, make covering workpiece fixing assembling to be added between pressing plate and cavity plate.
Further, the pressing plate includes the first pressing plate and the second pressing plate for being assemblied in female bottom end face, and assembling
In cavity plate bottom and close to bottom end face the 3rd pressing plate and the 4th pressing plate, the pressing plate by bolts assemblies covering workpiece to be added in
Between pressing plate and cavity plate.Carry out assembling covering workpiece to be added using the mode of pressing plate, pilot hole is pre-machined in workpiece to be added, is led to
Pressing plate is crossed, screw and pilot hole are assembled, it is ensured that the machining accuracy of covering class part.
Further, the cavity plate and punch-pin are domes, opened up in the cavity plate both sides side wall it is multiple have fitting recess, should
Side wall where assembling trench bottom is fixedly connected with the first pressing plate and the second pressing plate respectively by bolt.The structure makes covering to be processed
The assembling effect of part is more.
Further, it is provided with the both ends of first pressing plate and the second pressing plate for before and after cavity plate and punch-pin assembling
The end pressing plate of centering, it is releasable connection between the end pressing plate and the first pressing plate and the second pressing plate.Ensure pull-shaped effect
And precision.
A kind of skinning surface mould of the present invention carries out pull-shaped using cavity die structure pushes by the way of, solves the conjunction of traditional titanium
The difficulty of golden covering class part processing.On conventional art, there is the scheme as optimization at present, and the scheme master after optimizing
To be moved up using punch-pin, covering workpiece to be added is assembled by blank holder.In pull-shaped technique, the scheme after optimization is in practical operation
In, it is necessary to punch structure and cavity die structure pressing matching after can make covering component shaping to be added, the design method covering class
Very weak point often occurs in file.In the design, assemble covering class workpiece to be added using cavity plate and drive move down,
At a temperature of certain ask, titanium alloy covering material plasticity is preferable, yielding.And when cavity plate moves down, skin material is with convex
The shape of mold mechanism at the top of punch-pin by thinking that both sides are progressively bonded, and when die mechanism is moved to certain position, punch-pin mechanism is being pushed up
Upper movement is thought in the presence of bar, it is pull-shaped so as to realize.The design method be in covering class part walled thickness it is uniform on examined
Consider, in addition, being effectively ensured using the design in pull-shaped technique, titanium alloy covering material stress is more balanced, also, effectively rule
Keep away the problem of skin material stress point is constant in forming process.
A kind of pull-shaped method of skinning surface mould of the present invention, comprises the following steps：
A, covering workpiece to be added is assembled, covering workpiece to be added is assemblied on die mechanism moving up and down；
B, the assembling of punch-pin mechanism, by punch-pin assembling with bottom plate, making to be machined with the lead for guiding on bottom plate, and make convex
The pilot hole that processing coordinates with lead on mould, during assembling, it is directed to post and coordinates with pilot hole；
C, it is die-filling, plate is clamped between cavity plate and pressing plate, is bolted, it is contour that multiple first are placed on bottom plate
Block, cavity plate is positioned on the first isometry block, using the first isometry block so that covering workpiece lower end surface to be added and punch-pin summit
Between gap be present；
D, the mould of die-filling completion is positioned in thermoforming stove, cavity plate be clamped in moving up and down flat in stretch-forming device
On platform, by the push rod on stretch-forming device through bottom plate and being contacted with male bottom, using being arranged on the first pressing plate and the second pressing plate
The aft gap of the pressing plate of end, centering cavity plate and punch-pin, then cavity plate and bottom plate are separately fixed at the upper and lower flat of thermoforming stove
On platform, equipment upper mounting plate is moved up, and cavity plate is lifted, and removes the first isometry block；
E, after the completion of assembling, the second isometry block is set between bottom plate and die mechanism, furnace chamber is closed and heats up, be in furnace chamber
Temperature reach target temperature；
F, cavity plate is pushed, until die mechanism contacts with the second isometry block, now push rod is jacked up convex by the jogger hole on bottom plate
Mould closes with die mechanism, realizes that product finally shapes.
Further, the material of covering workpiece to be added is TC1-M, thickness 0.5mm.
Further, the woollen of covering workpiece to be added blanking by the way of laser cutting.
Further, the die mechanism includes cavity plate, is fixed on cavity plate and first on the opposite bottom end face of bottom plate
Pressing plate and the second pressing plate and the 3rd pressing plate and the 4th pressing plate being fixed on female bottom and close bottom end face, the pressing plate point
It is not fixedly connected on by screw on cavity plate, and covering workpiece to be added is assemblied between pressing plate and cavity plate.
Further, multiple fitting recess are machined with the cavity plate side wall, side wall where the assembling trench bottom offers logical
Hole, and assembled by screw and the first pressing plate and the second pressing plate.
Further, in the step d, in addition to die mechanism and punch-pin assembling assembling centering, connect on die mechanism
Multiple termination pressing plates for being used for front and rear centering are connect, centering is carried out simultaneously by the termination pressing plate, after the completion of assembling, remove termination pressure
Plate.
Further, the both ends of first pressing plate and the second pressing plate have been connected by screw termination pressing plate respectively.
Further, in the step e, target temperature is 650 DEG C -700 DEG C.
Further, in addition to step g, the covering class part of cooling forming, after the completion of pull-shaped, stop heating furnace chamber,
The furnace chamber temperature of forming furnace is allowed to decline naturally, after reaching normal temperature, the cooling of covering class part is completed, and is shaped.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, the present invention effectively solves the problems, such as conventional titanium alloy covering class part processing difficulties, utilizes the spy of titanium alloy material
Property, the pull-shaped technique of covering class part is realized using hot formed mode, effectively evades conventional art and is occurred using impact style
The problem of easy drawing crack or even wall unevenness, promote the processing efficiency and machining accuracy of space flight and aviation titanium alloy covering class part；
2nd, in the titanium alloy covering class part thermal forming device and technique that the present invention uses, fully take into account covering class part and adding
Due in stress and the mode of shaping, being moved up and down using die mechanism during work, and combine a small amount of displacement of punch-pin make it is convex
Mould and cavity plate are fitted close, and effectively improve machining accuracy, solve drawing and weak spot occur, the problem of so as to avoid reprocessing,
Therefore, the device of the design and the pull-shaped precision of technique are high, and production efficiency is high.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the postrotational side view of the present invention；
Fig. 3 is the schematic cross-section at A of the present invention；
Fig. 4 is the structural representation coordinated between lead and punch-pin of the present invention；
Fig. 5 is the structural representation of bottom plate of the present invention.
Marked in figure：1- punch-pin, 2- cavity plates, 3- bottom plates, 4- leads, the pressing plates of 5- the 3rd, the pressing plates of 6- first, 7- the 4th are pressed
Plate, the pressing plates of 8- second, 9- fitting recess, 10- jogger holes, 11- lifting bolts.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification, unless specifically stated otherwise, can be equivalent by other or with similar purpose
Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics
.
Embodiment
A kind of skinning surface mould, as depicted in figs. 1 and 2, including the punch-pin mechanism being fixed on stretch-forming device and fixation
In the die mechanism that can be moved up and down on stretch-forming device, the punch-pin mechanism and die mechanism have the curved surface of adaptation convex to ensure
Mould and cavity plate local gap uniformity, so that it is guaranteed that material flows uniformity in shaping.
Specifically, the device it is pull-shaped be located under 650 DEG C -700 DEG C of environment temperature carry out it is pull-shaped.
A kind of skinning surface mould of the present invention, carries out pull-shaped, the party in structure design by the way of cavity plate moves down
Formula using it is different from routine techniques when it is pull-shaped using the movement of cavity plate, moulded in the event of high temperatures by titanium alloy covering material
Property good, easily shaping, the effective precision for lifting the covering class part especially skin part of airplane skin, in the pull-shaped mould,
It is once-forming, the difficulty of processing of titanium alloy is not only solved, while ensure machining accuracy.In addition, originally it is that invention is to treat covering
Workpiece is assemblied on cavity plate, and using the movement of cavity plate, covering workpiece to be added being fitted on punch-pin progressively, which can
Skin material is avoided thin the problem of occur.In traditional handicraft, during punch-pin drive covering workpiece to be added moves up, skin material
It is unfavorable in Stretch Forming Process with stress, and need cavity plate to coordinate with punch-pin and squeeze into one step forming all the time at the contact point of punch-pin
In the even results of covering class part integral thickness.In the design, the consideration in the problem, combined using different modes high
The environment of temperature makes covering workpiece to be added be fitted in well on punch-pin, and is to ensure during punch-pin coordinates with cavity plate
The surface flatness of skin material, while the situation of wrinkle is avoided the occurrence of, even more avoid covering workpiece to be added in Stretch Forming Process from drawing
The problem of splitting.
In design based on above-mentioned embodiment, in another embodiment, punch-pin mechanism includes removable solid
Surely the bottom plate 3 being connected on stretch-forming device and the punch-pin 1 being arranged on bottom plate, the punch-pin 1 have under the active force of stretch-forming device
There is displacement moving up and down.The design method is advantageous to the pull-shaped effect of skin material and the processing essence of covering class part
Degree.As preferable mode, in a wherein embodiment, covering workpiece to be added uses titanium alloy covering material.Tool
The body trade mark is TC1-M.
In design principle based on above-mentioned embodiment, in another embodiment, as shown in figure 4, bottom plate 3
On be provided with the more leads being fixedly connected 4, be provided with punch-pin 1 with lead coordinate pilot hole, in stretch-forming device
Active force lower punch can be moved up by pilot hole along lead.Using the movement of punch-pin so that punch-pin is more preferable with die mechanism
Cooperation, beneficial to forming effect.Preferably, in a wherein embodiment, the line of lead 4 is in polygon.Specifically
, the quantity of lead 4 is 4.According to the quantitative design of the lead 4 that can vary in size of mould.As preferable, another
In embodiment, the lead 4 runs through bottom plate, and is fixed by screws on bottom plate.
In design principle based on above-mentioned embodiment, in a wherein embodiment, as shown in figure 5, bottom
Multiple jogger holes 10 that can run through stretch-forming device push rod, stretch-forming device push rod during die mechanism pushes are offered on plate 3
Punch-pin is withstood by jogger hole, punch-pin is contacted with plate.As a kind of more preferred embodiment, the jogger hole 10
It is uniformly distributed for circumference array.Specifically, the jogger hole 10 is 4.In addition, the quantity in the hole is not as restriction, in actual behaviour
During work, primarily to top rod driving punch-pin.
And in order to preferably realize that mould assembles, in another embodiment, bottom plate 3 is additionally provided with lifting bolt
11。
Above-mentioned that the structure of punch-pin mechanism mainly is optimized into design, which is mainly designed to coordinate up and down
Mobile die mechanism, in addition, following optimization design is done in the design for die mechanism.
In design principle based on above-mentioned embodiment, in another embodiment, die mechanism includes tool
Have and the cavity plate of the curved surface of punch-pin authority match 2, the cavity plate 2 are provided with the press plate mechanism for clamping covering workpiece to be added.
In design principle based on above-mentioned embodiment, designed as preferable, wherein an embodiment
In, press plate mechanism includes more block pressur plates, and covering workpiece to be added is fixed on cavity plate by the pressing plate by connector, makes covering to be added
Workpiece fixing assembling is between pressing plate and cavity plate.The assembling being equipped with beneficial to covering workpiece to be added of which.
In design principle based on above-mentioned embodiment, in another embodiment, pressing plate includes being assemblied in
The first pressing plate 6 and the second pressing plate 8 of female bottom end face, and it is assemblied in the 3rd pressing plate of cavity plate bottom and close bottom end face
5 and the 4th pressing plate 7, the pressing plate is by bolts assemblies covering workpiece to be added between pressing plate and cavity plate.As preferable installation side
Formula, specifically, the first pressing plate 6 and the second pressing plate 8 are fixed on cavity plate and the opposite bottom end face of bottom plate, the 3rd pressing plate 5 and the
Four pressing plates 7 are fixed on female bottom and on bottom end faces, and the pressing plate is fixedly connected on cavity plate by screw respectively, and
And covering workpiece to be added is assemblied between pressing plate and cavity plate.
In design principle based on above-mentioned embodiment, in a wherein embodiment, as shown in figure 3, recessed
Mould 2 and punch-pin 1 are domes, opened up in the both sides side wall of cavity plate 2 it is multiple have fitting recess 9, side wall where the bottom of fitting recess 9
It is fixedly connected respectively with the first pressing plate and the second pressing plate by bolt.The setting of which makes covering workpiece to be added in the effect of assembling
It is more preferable on fruit, be advantageous to shape.
In design principle based on above-mentioned embodiment, in another embodiment, the first pressing plate 6 and second
The end pressing plate for centering before and after cavity plate and punch-pin assembling, the end pressing plate and the first pressure are provided with the both ends of pressing plate 8
It is releasable connection between plate and the second pressing plate.
In another embodiment, as preferable mode, the first pressing plate and the second pressing plate are close to the side of punch-pin
It is adapted in the curved surface being engaged with punch-pin, the curved surface and with cavity die structure internal end surface.
Pressure during in order to ensure that covering workpiece to be added is not coordinated by punch-pin and cavity plate, wherein an embodiment
In, the mounting groove for placing covering workpiece to be added is provided with punch-pin.
In design principle based on above-mentioned embodiment, for first that covering is to be added in view of being needed in assembling process
Workpiece is assemblied on cavity plate and die mechanism needs to enable punch-pin to move up during moving down, wherein a specific implementation
In mode, the mould also includes being used to avoid multiple first isometry blocks that punch-pin contacts with covering workpiece to be added, and multiple use
It is beneficial to the second isometry block that punch-pin moves up in keeping the gap between punch-pin and die mechanism.
More preferred, due to being covering class material, the lightening hole for reducing weight is further opened with punch-pin.
In design principle based on above-mentioned embodiment, for a kind of pull-shaped side of above-mentioned skinning surface mould
Method, comprise the following steps：
A, covering workpiece to be added is assembled, covering workpiece to be added is assemblied on die mechanism moving up and down；
B, the assembling of punch-pin mechanism, by punch-pin assembling with bottom plate, making to be machined with the lead for guiding on bottom plate, and make convex
The pilot hole that processing coordinates with lead on mould, during assembling, it is directed to post and coordinates with pilot hole；
C, it is die-filling, plate is clamped between cavity plate and pressing plate, is bolted, it is contour that multiple first are placed on bottom plate
Block, cavity plate is positioned on the first isometry block, using the first isometry block so that covering workpiece lower end surface to be added and punch-pin summit
Between gap be present；
D, the mould of die-filling completion is positioned in thermoforming stove, cavity plate be clamped in moving up and down flat in stretch-forming device
On platform, by the push rod on stretch-forming device through bottom plate and being contacted with male bottom, using being arranged on the first pressing plate and the second pressing plate
The aft gap of the pressing plate of end, centering cavity plate and punch-pin, then cavity plate and bottom plate are separately fixed at the upper and lower flat of thermoforming stove
On platform, equipment upper mounting plate is moved up, and cavity plate is lifted, and removes the first isometry block；
E, after the completion of assembling, the second isometry block is set between bottom plate and die mechanism, furnace chamber is closed and heats up, be in furnace chamber
Temperature reach target temperature；
F, cavity plate is pushed, until die mechanism contacts with the second isometry block, now push rod is jacked up convex by the jogger hole on bottom plate
Mould closes with die mechanism, realizes that product finally shapes.
As preferable, in a wherein embodiment, the material of covering workpiece to be added is TC1-M, and thickness is
0.5mm。
Need to be processed in advance based on covering workpiece to be added, in another embodiment, covering workpiece to be added
Woollen blanking by the way of laser cutting.
In design principle based on above-mentioned embodiment, in order to ensure the assembling effect of covering workpiece to be added, at it
In in an embodiment, die mechanism includes cavity plate, is fixed on cavity plate and the first pressure on the opposite bottom end face of bottom plate
Plate and the second pressing plate and the 3rd pressing plate and the 4th pressing plate being fixed on female bottom and close bottom end face, pressing plate difference
It is fixedly connected on by screw on cavity plate, and covering workpiece to be added is assemblied between pressing plate and cavity plate.
For positioning and annexation, it is preferred that in a wherein embodiment, be machined with cavity plate side wall multiple
Fitting recess, side wall where the assembling trench bottom offers through hole, and is assembled by screw and the first pressing plate and the second pressing plate.
It is to need to carry out centering positioning in die-filling process, in another embodiment, in step d, in addition to it is recessed
Mold mechanism and punch-pin assembling assembling centering, multiple termination pressing plates for being used for front and rear centering are connected on die mechanism, pass through the end
Head pressing plate carries out centering simultaneously, after the completion of assembling, removes termination pressing plate.
Specific design as structure, it is preferred that in another embodiment, the two of the first pressing plate and the second pressing plate
End has been connected by screw termination pressing plate respectively.
Preferably, in a wherein embodiment, in step e, target temperature is 650 DEG C -700 DEG C.
As complete technique, in another embodiment, the technique also includes step g, the covering of cooling forming
Class part, after the completion of pull-shaped, stop heating furnace chamber, allow the furnace chamber temperature of forming furnace to decline naturally, after reaching normal temperature, covering
The cooling of class part is completed, and is shaped.
A kind of skinning surface mould of the present embodiment carries out pull-shaped by the way of cavity die structure pushes, and solves traditional titanium
The difficulty of alloy covering class part processing.On conventional art, there is the scheme as optimization at present, and the scheme after optimizing
Mainly moved up using punch-pin, covering workpiece to be added is assembled by blank holder.In pull-shaped technique, the scheme after optimization is in actual behaviour
, it is necessary to which covering component shaping to be added can be made after punch structure and cavity die structure pressing matching in work, the design method covering
Very weak point often occurs in class file.In the design, assemble covering class workpiece to be added using cavity plate and drive to moving down
Dynamic, at a temperature of certain ask, titanium alloy covering material plasticity is preferable, yielding.And when cavity plate moves down, skin material with
The shape of punch-pin mechanism at the top of punch-pin by thinking that both sides are progressively bonded, and when die mechanism is moved to certain position, punch-pin mechanism exists
Upper movement is thought in the presence of push rod, it is pull-shaped so as to realize.The design method is in the uniformly upper progress of covering class part walled thickness
Consider, in addition, being effectively ensured using the design in pull-shaped technique, titanium alloy covering material stress is more balanced, also, effectively
Evade the problem of skin material stress point is constant in forming process.
In summary:
1st, the present invention effectively solves the problems, such as conventional titanium alloy covering class part processing difficulties, utilizes the spy of titanium alloy material
Property, the pull-shaped technique of covering class part is realized using hot formed mode, effectively evades conventional art and is occurred using impact style
The problem of easy drawing crack or even wall unevenness, promote the processing efficiency and machining accuracy of space flight and aviation titanium alloy covering class part；
2nd, in the titanium alloy covering class part thermal forming device and technique that the present invention uses, fully take into account covering class part and adding
Due in stress and the mode of shaping, being moved up and down using die mechanism during work, and combine a small amount of displacement of punch-pin make it is convex
Mould and cavity plate are fitted close, and effectively improve machining accuracy, solve drawing and weak spot occur, the problem of so as to avoid reprocessing,
Therefore, the device of the design and the pull-shaped precision of technique are high, and production efficiency is high.
The invention is not limited in foregoing embodiment.The present invention, which expands to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
- A kind of 1. skinning surface mould, it is characterised in that：Including the punch-pin mechanism being fixed on stretch-forming device and it is fixed on pull-shaped The die mechanism that can be moved up and down on device, the punch-pin mechanism and die mechanism have adaptation curved surface with ensure punch-pin with it is recessed Mould local gap uniformity, so that it is guaranteed that material flows uniformity in shaping.
- A kind of 2. skinning surface mould as claimed in claim 1, it is characterised in that：The punch-pin mechanism includes removable fixation even The bottom plate being connected on stretch-forming device（3）With the punch-pin being arranged on bottom plate（1）, the punch-pin（1）Under the active force of stretch-forming device With displacement moving up and down.
- A kind of 3. skinning surface mould as claimed in claim 2, it is characterised in that：The bottom plate（3）On be provided with more it is solid Surely the lead connected（4）, punch-pin（1）On be provided with lead coordinate pilot hole, it is convex under the active force of stretch-forming device Mould can be moved up by pilot hole along lead.
- A kind of 4. skinning surface mould as claimed in claim 2, it is characterised in that：The bottom plate（3）On offer it is multiple can With through the jogger hole of stretch-forming device push rod（10）, stretch-forming device push rod is withstood convex by jogger hole during die mechanism pushes Mould, contact punch-pin plate.
- A kind of 5. skinning surface mould as claimed in claim 1, it is characterised in that：The die mechanism includes having and punch-pin The cavity plate of the curved surface of authority match（2）, the cavity plate（2）It is provided with the press plate mechanism for clamping covering workpiece to be added.
- A kind of 6. skinning surface mould as claimed in claim 5, it is characterised in that：The press plate mechanism includes more block pressur plates, Covering workpiece to be added is fixed on cavity plate by the pressing plate by connector, makes covering workpiece fixing assembling to be added in pressing plate and cavity plate Between.
- A kind of 7. skinning surface mould as claimed in claim 6, it is characterised in that：The pressing plate includes being assemblied in female bottom First pressing plate of end face（6）With the second pressing plate（8）, and it is assemblied in the 3rd pressing plate of cavity plate bottom and close bottom end face（5） With the 4th pressing plate（7）, the pressing plate by bolts assemblies covering workpiece to be added between pressing plate and cavity plate, the cavity plate（2）Both sides side Being opened up on wall multiple has fitting recess（9）, the fitting recess（9）Side wall where bottom is pressed with the first pressing plate and second respectively by bolt Plate is fixedly connected.
- A kind of 8. skinning surface mould as claimed in claim 7, it is characterised in that：First pressing plate（6）With the second pressing plate （8）Both ends on be provided with end pressing plate for centering before and after cavity plate and punch-pin assembling, the end pressing plate and the first pressing plate And second be releasable connection between pressing plate.
- A kind of 9. pull-shaped method of skinning surface mould as described in claim any one of 1-8, it is characterised in that：Including once Step：A, covering workpiece to be added is assembled, covering workpiece to be added is assemblied on die mechanism moving up and down；B, the assembling of punch-pin mechanism, by punch-pin assembling with bottom plate, making to be machined with the lead for guiding on bottom plate, and make convex The pilot hole that processing coordinates with lead on mould, during assembling, it is directed to post and coordinates with pilot hole；C, it is die-filling, plate is clamped between cavity plate and pressing plate, is bolted, it is contour that multiple first are placed on bottom plate Block, cavity plate is positioned on the first isometry block, using the first isometry block so that between covering workpiece lower surface to be added and punch-pin formation Gap, do not contact；D, the mould of die-filling completion is positioned in thermoforming stove, cavity plate be clamped in moving up and down flat in stretch-forming device On platform, by the push rod on stretch-forming device through bottom plate and being contacted with male bottom, using being arranged on the first pressing plate and the second pressing plate The aft gap of the pressing plate of end, centering cavity plate and punch-pin, then cavity plate and bottom plate are separately fixed at the upper and lower flat of thermoforming stove On platform, equipment upper mounting plate is moved up, and cavity plate is lifted, and removes the first isometry block；E, after the completion of assembling, in bottom plate and cavity plate machine Second isometry block is set between structure, furnace chamber is closed and heats up, is that the temperature in furnace chamber reaches target temperature；F, cavity plate is pushed, until die mechanism contacts with the second isometry block, now push rod is jacked up convex by the jogger hole on bottom plate Mould closes with die mechanism, realizes that product finally shapes.
- A kind of 10. pull-shaped method of skinning surface mould as claimed in claim 9, it is characterised in that：In the step d, also Including die mechanism and punch-pin assembling assembling centering, multiple termination pressing plates for being used for front and rear centering are connected on die mechanism, are led to Cross the termination pressing plate and carry out centering simultaneously, after the completion of assembling, remove termination pressing plate.
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| CN201710939493.9A CN107649590B (en) | 2017-10-11 | 2017-10-11 | Skin stretch-forming die and stretch-forming method thereof |
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| CN201710939493.9A CN107649590B (en) | 2017-10-11 | 2017-10-11 | Skin stretch-forming die and stretch-forming method thereof |
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| CN108971355A (en) * | 2018-08-09 | 2018-12-11 | 南京航空航天大学 | The corrugated method of large curved surface covering is eliminated based on gradual change gap mold |
| CN110394399A (en) * | 2019-06-14 | 2019-11-01 | 李�荣 | A kind of slab covering class component die |
| CN110936109A (en) * | 2019-11-22 | 2020-03-31 | 西安飞机工业（集团）有限责任公司 | Large-size titanium alloy skin composite forming method |
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|---|---|
| CN107649590B (en) | 2023-09-01 |
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Address after: 618400 Sichuan Deyang Shifang Economic Development Zone (Ling Jie Park) blue sky Road No. 3 Patentee after: Sichuan Xinhang Titanium Technology Co.,Ltd. Address before: 618400 Sichuan Deyang Shifang Economic Development Zone (Ling Jie Park) blue sky Road No. 3 Patentee before: SICHUAN FUTURE AEROSPACE INDUSTRIAL Co.,Ltd. |