CN104439001B - A kind of die-forging forming method of large titanium alloy structural member - Google Patents
A kind of die-forging forming method of large titanium alloy structural member Download PDFInfo
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Abstract
The invention provides a kind of die-forging forming method of large titanium alloy structural member, it can solve the problem of high muscle filling difficult, the high muscle turned-down edge that processing is present is formed in conventional die-forging forming method, while material resistance of deformation when effectively reducing die-forging forming, effectively improving stock utilization.Blocking shaping is first carried out to blank to obtain pre- forging, the high muscle portion of blocking into shape Forging divides the web part with pre- forging, the finish-forging shaping of web pit is carried out to pre- forging again to obtain final forging, wherein blocking shaping first carries out the web lower die face shaping of the die-forging forming and pre- forging of the high muscle portion point of forging to blank, the sub-material pressure neck shaping that die face on the blank of high muscle sections inner side carries out longitudinal direction is pointed to simultaneously, metal material forms a boss to flowing on the inside of high muscle and upwards convergence in the process, form the recessed groove of a Longitudinal extending between boss in high muscle portion point simultaneously；Boss and groove are forged and pressed again, so as to shape the web part of pre- forging.
Description
Technical field
The present invention relates to the heat processing and forming field of metal material, more particularly, to being thermally processed into for titanium alloy structure forging
Shape field, specially a kind of die-forging forming method of large titanium alloy structural member.
Background technology
So-called large titanium alloy forging part refers to length（L）More than 2000mm, forge weight（Mg）More than 500Kg, height
（H）Structural member more than 250mm.A kind of large titanium alloy structural forging 4, its structure is shown in Fig. 1 and Fig. 2, the single side face of its forging
The ratio of width to height that there is high muscle 1 and the high muscle 1 is 7：1, its material is TC18 titanium alloys, and the titanium alloy structure part is important on aircraft
Stressed member, it is desirable to die-forging forming.Because the forging is present, size is big, weight weight, thus belongs to large titanium alloy structural forging, its
Conventional manufacturing process is：Blocking shaping, the high muscle 1 of preform and web 2 are carried out for the blank of rectangle to cross section first, obtained
Pre- forging 3（See Fig. 3 and Fig. 4）, then finish-forging shaping is carried out to the pre- forging 3, obtain final forging part 4.It is in forming
During there is problems with：（1）When carrying out blocking shaping, blank 10 is fully seated at upper mould 5 according to conventional method
In the web die cavity of lower mould 6, Fig. 5-1 is seen, then high muscle filling is difficult in forming process, and asking for high muscle turned-down edge occurs
Topic；And if blank is positioned at the high muscle of upper mould and lower mould and shaped between die cavity, see Fig. 5-2, then high muscle is easily formed but meeting
There is excessive metal to flow to the overlap on the outside of high muscle, so as to the problem of stock utilization is low, material resistance of deformation is big occur；（2）
The width ratio of the high muscle of the forging is 7：1, no matter when blocking shapes, how blank positions and puts, and it will meet high muscle shaping all
The larger resistance of deformation born is needed, therefore higher requirement is proposed to forging equipment and mould.
The content of the invention
In view of the above-mentioned problems, the invention provides a kind of die-forging forming method of large titanium alloy structural member, it can be solved
The problem of processing the difficult high muscle filling existed, high muscle turned-down edge is formed using conventional die-forging forming method, while can be effective
Reduce die-forging forming when material resistance of deformation and effectively improve stock utilization.
Its technical scheme is such, carries out blocking shaping to blank first to obtain pre- forging, the blocking shaping
Web part of the high muscle portion of forging point with the pre- forging, then the pre- forging is carried out web pit finish-forging shaping so that
Obtain final forging, it is characterised in that：The blocking shaping comprises the following steps：
（1）First time blocking shapes：First blocker the blank is carried out the die forging of the high muscle portion point of the forging into
The web lower die face shaping of shape and the pre- forging, first blocker is pointed to the high muscle sections inner side at the same time
Blank on die face carry out longitudinal direction sub-material pressure neck shaping, the sub-material pressure neck during metal material it is pre- described first
Under the forging and stamping of forging die to flow on the inside of the high muscle and upwards convergence formed a boss, while the high muscle portion divide with it is described convex
The recessed groove of a Longitudinal extending is formed between platform；
（2）Second of blocking shaping：The boss and groove of blank after first time blocking shaping are entered
Row forging and stamping, so as to shape the web part of the pre- forging.
It is further characterized by：
The boss towards the side of the high muscle part side be inclined-plane, the inclined-plane and with the inclined-plane to height
The medial surface of muscle portion point is connected to form the recessed groove respectively with the underrun arc surface transition of the groove；
The ratio between the blank height H0 and high muscle Partial Height H of the final forging is 0.9~1.1；
During the first time blocking shaping, the blank height H0 and groove width W ratio≤4.5, the ditch
Well width W refer to the point of intersection S 1 of the high muscle medial surface extended line and the trench bottom surfaces extended line to trench bottom surfaces extended line with
Width distance between the point of intersection S 2 of the inclined-plane extended line；
Gradient θ≤45 ° on the inclined-plane；
The trench bottom surfaces are between the web thickness h1 of the thickness h 2 between the lower die face of web part and the pre- forging
Ratio be 0.9~1.0；
The upper die face of the boss to the thickness H1 between lower die face=（H+h2）/2.
The beneficial effect of the inventive method is：
（1）Conventional blocking shaping is improved to blocking shaping twice by it, and it first carries out the high muscle portion of forging to blank
The disposable die-forging forming divided, so that the shaping arrival rate of forging high muscle portion point is ensure that, while being pointed to high muscle sections inner side
Blank on die face carry out longitudinal direction sub-material pressure neck shaping, due to sub-material pressure neck during metal material in the first blocker
Forging and stamping under to flowing on the inside of high muscle and convergence forms a boss, forms one between the boss while dividing in high muscle portion upwards
The recessed groove of individual Longitudinal extending, thus second of blocking is being carried out so as to complete pre- forging web to boss and trench portions
The resistance of deformation of material when can effectively improve stock utilization during partial shaping and reduce die forging, and then reduce to equipment most
The demand of big plastic force；
（2）The web lower die face of pre- forging is shaped when wherein first time blocking shapes simultaneously, is easy in second of blocking
Blank is positioned；
（3）The ratio between the blank height H0 and high muscle Partial Height H of final forging control is 0.9~1.1, and the ratio is less than
0.9 high muscle portion point is difficult shaping in first time blocking in place, so as to can increase finish-forging process shaping drag；If the ratio is too
Big then billet cross section width can be reduced, and be unfavorable for metal filled and flowing；
（4）Blank height H0 and groove width W ratio≤4.5 when first time blocking shapes, are being forged if more than if the value
Unstability generation folding easily occurs for blank during making；And gradient θ≤45 ° on boss inclined-plane, if more than second of blocking if the value
Web folding is easily caused during shaping.
Brief description of the drawings
The large titanium alloy forging part schematic diagram of Fig. 1 the inventive method processing；
The schematic cross-section of the large titanium alloy forging part of Fig. 2 the inventive method processing；
Fig. 3 is pre- forging schematic diagram when processing large titanium alloy forging part of the present invention using conventional forging forming method；
Fig. 4 is the section signal of pre- forging when processing large titanium alloy forging part of the present invention using conventional die-forging forming method
Figure；
Fig. 5-1 is that blocking shapes during processing large titanium alloy forging part of the present invention using conventional die-forging forming method
Schematic diagram；
Fig. 5-2 is using another base during conventional die-forging forming method processing large titanium alloy forging part of the present invention
Expect the schematic diagram of the blocking shaping of positioning method；
Fig. 6 be the inventive method in first time blocking shaping after blank schematic diagram；
Fig. 7 is the billet cross section schematic diagram after first time blocking shaping in the inventive method；
Fig. 8 is first time blocking shaping schematic diagram in the inventive method.
Embodiment
The implementation process of the inventive method is specifically described below in conjunction with the accompanying drawings：
（One）Blocking shaping is carried out to blank 10 first so as to obtain pre- forging 3, wherein blocking shaping comprises the following steps：
（1）First time blocking shapes：See Fig. 8, the first blocker 20 carries out the die forging of the high muscle portion point 1 of forging to blank 10
The web lower die face 2-1 of shaping and pre- forging shapes, and the first blocker 20 is pointed to the base of the inner side of high muscle portion point 1 at the same time
Die face carries out the sub-material pressure neck shaping of longitudinal direction, forging and stamping of the metal material in the first blocker 20 during sub-material presses neck on material
It is lower to be flowed to high muscle inner side and converge one boss 30 of formation upwards, while dividing formation one between 1 and boss 30 to indulge in high muscle portion
To the recessed groove 40 of extension, Fig. 6 and Fig. 7 are seen, wherein boss 30 is inclined-plane 31 towards the side of high muscle part side, and this is oblique
Face 31 and with the inclined-plane 31 to bottom surface 41 of the medial surface 11 respectively with groove 40 of high muscle portion point pass through arc surface transition
Connection is so as to form recessed groove 40；In Fig. 7,203 be die joint；In Fig. 8,201 be the upper mould of the first blocker 20,202
For the lower mould of the first blocker 20；
（2）Second of blocking shaping：The boss 30 and groove 40 of blank 101 after the shaping of first time blocking are carried out
Forging and stamping, so as to shape the web part 2 of pre- forging 3；
After the completion of blocking shaping, the finish-forging shaping of web pit 5 is carried out to pre- forging 3 to obtain final forging 4.
The ratio between the height H0 of blank 10 and height H of the high muscle portion of forging 4 point 1 is 0.9~1.1；
When first time blocking shapes, the height H0 and the width W of groove 40 of blank 10 ratio≤4.5, groove width W refer to
Point of intersection S 1 to the extended line of trench bottom surfaces 41 of the high extended line of muscle medial surface 11 and the extended line of trench bottom surfaces 41 extends with inclined-plane 31
Width distance between the point of intersection S 2 of line；
Gradient θ≤45 ° on inclined-plane 31；
Trench bottom surfaces 41 are between the thickness h 1 of web 2 of the thickness h 2 between the lower die face 2-1 of web part and pre- forging 3
Ratio is 0.9~1.0；
The upper die face 32 of boss 30 to the thickness H1 between lower die face 2-1=（H+h2）/2；
（Two）The finish-forging shaping of web pit 5 is carried out to pre- forging 3 again to obtain final forging 4.
In the present embodiment, the height H of the high muscle portion point 1 of forging 4 is 260mm, and the scheduling H0 of blank 10 is 280mm, blocking
The thickness h 1 of the web 2 of part 3 is 120mm, and the width W of the groove 40 of blank 101 is 70mm, blank 10 after the shaping of first time blocking
Height H0 and the width W of groove 40 ratio be 4≤4.5, under the gradient θ on inclined-plane 31 is 40 °, trench bottom surfaces 41 to web part
Thickness h 2 between die face 2-1 is 120mm, and the upper die face 32 of boss 30 to the thickness H1 between lower die face 2-1 is 190mm.
Claims (6)
1. a kind of die-forging forming method of large titanium alloy structural member, carries out blocking shaping to obtain blocking to blank first
Part, the high muscle portion of the blocking into shape Forging divides the web part with the pre- forging, then recessed to the pre- forging progress web
The finish-forging shaping in hole is so as to obtain final forging, it is characterised in that：The blocking shaping comprises the following steps：
（1）First time blocking shapes：First blocker the blank is carried out the die-forging forming of the high muscle portion point of the forging with
And the web lower die face shaping of the pre- forging, first blocker is pointed to the base of the high muscle sections inner side at the same time
Die face carries out the sub-material pressure neck shaping of longitudinal direction on material, and metal material is in first blocker during sub-material pressure neck
Forging and stamping under to flow on the inside of the high muscle and upwards convergence formed a boss, while the high muscle portion point and the boss it
Between formed a Longitudinal extending recessed groove；
（2）Second of blocking shaping：The boss and groove of blank after first time blocking shaping are forged
Pressure, so as to shape the web part of the pre- forging；
The boss towards the side of the high muscle part side be inclined-plane, the inclined-plane and with the inclined-plane to high muscle portion
The medial surface divided is connected to form the recessed groove respectively with the underrun arc surface transition of the groove.
2. a kind of die-forging forming method of large titanium alloy structural member according to claim 1, it is characterised in that：The base
The ratio between the height H0 of material and high muscle Partial Height H of the final forging is 0.9~1.1.
3. a kind of die-forging forming method of large titanium alloy structural member according to claim 1, it is characterised in that：Described
During blocking shaping, the blank height H0 and groove width W ratio≤4.5, the groove width W refers to described
The point of intersection S 1 of high muscle medial surface extended line and the trench bottom surfaces extended line is to trench bottom surfaces extended line and the inclined-plane extended line
Point of intersection S 2 between width distance.
4. a kind of die-forging forming method of large titanium alloy structural member according to claim 1, it is characterised in that：It is described oblique
Gradient θ≤45 ° in face.
5. a kind of die-forging forming method of large titanium alloy structural member according to claim 1, it is characterised in that：The ditch
Groove bottom to the ratio between the web thickness h1 of the thickness h 2 between the lower die face of web part and the pre- forging be 0.9~
1.0。
6. a kind of die-forging forming method of large titanium alloy structural member according to claim 1, it is characterised in that：It is described convex
The upper die face of platform to the thickness H1 between lower die face=（H+h2）/ 2, wherein H are the high muscle Partial Height of the final forging,
H2 is the trench bottom surfaces to the thickness between the lower die face of web part.
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| CN112108607B (en) * | 2020-08-12 | 2022-05-20 | 沈阳中钛装备制造有限公司 | Forming method of titanium alloy vehicle door hinge forging |
| CN112775373A (en) * | 2020-12-21 | 2021-05-11 | 西南铝业（集团）有限责任公司 | Forging method of disc part |
| CN113084064B (en) * | 2021-04-14 | 2022-09-02 | 西安三角防务股份有限公司 | Large titanium alloy deep cavity long box rib forging, die and forming method thereof |
| CN114799004B (en) * | 2022-04-28 | 2023-12-22 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forming method of thin web forging |
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| JP3452762B2 (en) * | 1997-05-02 | 2003-09-29 | 三菱自動車テクノメタル株式会社 | Horizontal recess forming forging device |
| JPH11179476A (en) * | 1997-12-24 | 1999-07-06 | Toyota Motor Corp | Forging method for roughly formed material having bent body part |
| JP3900419B2 (en) * | 2002-06-14 | 2007-04-04 | トヨタ自動車株式会社 | Forging method of forgings with bent parts |
| CN101262965B (en) * | 2005-09-16 | 2011-04-13 | 本田技研工业株式会社 | Process for producing molded article with undercut, forging apparatus therefor |
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