CN108188338A - The forging method of the large complicated forging part of A-100 steel and its pre- forging design method - Google Patents
The forging method of the large complicated forging part of A-100 steel and its pre- forging design method Download PDFInfo
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- CN108188338A CN108188338A CN201711473737.5A CN201711473737A CN108188338A CN 108188338 A CN108188338 A CN 108188338A CN 201711473737 A CN201711473737 A CN 201711473737A CN 108188338 A CN108188338 A CN 108188338A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
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Abstract
The present invention relates to 100 steel forgings of A to make field, discloses a kind of forging method of the large complicated forging part of 100 steel of A and its pre- forging design method.The pre- forging of the large complicated forging part of 100 steel of A uses the design method of bar portion diamond-shaped cross-section, the deflection of forging finish-forging process can be improved to the maximum extent, it may be such that deflection >=25% of forging bar portion center portion, reduce the differential requirement of grain size of forging different location, ensure differential grade≤3 grade of grain size of finish-forging part, it realizes that pre- forging quickly positions simultaneously, prevents forging process blank from tilting, ensure the filling of forging.
Description
Technical field
Make field the present invention relates to A-100 steel forgings, the forging method of especially a kind of large complicated forging part of A-100 steel and
Its pre- forging design method.
Background technology
Modern aircraft is included airliner and military aircraft and is mostly set with undercarriage using unimach such as A-100 steel
Meter manufacture, the key technical index mechanical property and grain size of forging are more quick to the deflection in forging process and forging times
Sense.Additionally, due to the large complicated forging part of undercarriage have large-scale (forge weight is mostly more than 1t), sectional area change compared with
The special-shaped branch forging feature of (maximum can be more than 4 times) greatly, forging degree-of-difficulty factor are most complicated S4 grades.Pre- forging design is not
Rationally, the problems such as easily bringing forging deformation uneven, temperature field is uneven causes the structure property of forging to control difficulty big, and hold
The forging defects such as folding are also easy to produce, the microstructure homogenization manufacture for forging brings larger difficulty.
Undercarriage part has the characteristics that long axis, branch, more high packets, is mostly set when forging designs using profile-followed method
Meter, bar portion is long axis class formation.Most domestic undercarriage is to reduce mold input cost with complicated forging part, adopts more
Die-forging forming is carried out with a set of finisher, and then brings complicated waste blank structure, each site tissue of forging and performance difference larger；Separately
Though there are the design and manufacture that the complicated forging part of small part undercarriage increases blocker, to increase bar portion deflection and drop
Low blocking shapes difficulty, and the pre- forging of undercarriage bar portion is designed using square-section.
Undercarriage uses traditional square-section design method with the pre- forging of the large complicated forging part of A-100 steel, though
Difficulty so is reduced in design and blocker process, but inevitably brings the serious unevenness of finish-forging part deformation
Even, maximum deformation quantity is 4 times or more of least amount of deformation, and then brings 3 grades of forging grain size difference ＞ or more, easily makes forging
Cause to scrap due to mixed crystal.
The pre- forging of the large complicated forging part of A-100 steel uses traditional square-section design method, easily brings finish-forging mistake
The journey pendulum material time is partially long, initial forging temperature is relatively low, die wear degree is bigger than normal, the inclination of forging process blank leads to finish-forging part along bar portion
Generate longitudinal folding forging defect equivalent risk.
Invention content
The technical problems to be solved by the invention be to provide a kind of large complicated forging part of A-100 steel forging method and its
Pre- forging design method can reduce waste base difficulty, the deformation uniformity for improving forging finish-forging process each position to greatest extent
With the uniformity of forging tissue.
The pre- forging design method of the large complicated forging part of A-100 steel disclosed by the invention, includes the following steps：
Finish-forging part is designed according to the part shape to be forged；
According to the pre- forging that the structure design of finish-forging part simplifies, the cross sectional shape of pre- forging is diamond-shaped cross-section；
The numerical simulation forged, the pressure direction of forging are consistent with a diagonal of pre- forging diamond-shaped cross-section；
According to numerical simulation, pre- forging diamond-shaped cross-section size is adjusted, optimizes the deflection of forging each position to greatest extent,
It is made to tend to be uniform；
According to numerical simulation, pre- forging diamond-shaped cross-section size and pre- forging other positions size, reasonable distribution blocking are adjusted
Part deflection and finish-forging part deflection increase blocking and the finish-forging deformation of the large complicated forging part of undercarriage to greatest extent
Amount, and its different location deflection is made to tend to be uniform.
Preferably, each position is at least 20% per the deflection of fire in pre- forging to the forging process of finish-forging part.
Preferably, each position is at least 25% per the deflection of fire in pre- forging to the forging process of finish-forging part.
Preferably, differential grade≤3 grade of the grain size of finish-forging part.
Preferably, cornerwise length that forging direction is parallel in the diamond-shaped cross-section of the pre- forging is h, perpendicular to forging
The cornerwise length for making direction is d, and h and d meet relational expression：
1.36≤h/d≤1.56。
The forging method of the large complicated forging part of A-100 steel disclosed by the invention, including A-100 steel as described above large size
Complicated forging part blocking part design method.
The beneficial effects of the invention are as follows：Pre- forging present invention employs diamond-shaped cross-section is designed instead of traditional rectangular section
The pre- forging in face, it is ensured that forging is from blocking to the deformation uniformity of finish-forging process different location and structural homogenity, difference
The lot stability of batch forging, the batch for large complicated forging part stablizes the supply of material and provides reliable guarantee, especially suitable for flying
The A-100 steel type complexity forging parts such as machine undercarriage.
Description of the drawings
Fig. 1 is the schematic cross-section of forging；
Fig. 2 is the forging structure diagram of the embodiment of the present invention；
Fig. 3 is the pre- forging sketch of tradition；
Fig. 4 is the A-A/B-B/C-C schematic cross-sections of Fig. 3；
Fig. 5 is the pre- forging finish-forging process deflection distribution map of tradition；
Fig. 6 is the pre- forging sketch of the present invention；
Fig. 7 is that the pre- forging bar portion of the present invention uses the schematic diagram of diamond-shaped cross-section design method；
Fig. 8 is the deflection simulation and forecast figure of pre- forging design method using the present invention；
The diamond-shaped cross-section bar portion that Fig. 9 is the present invention contacts schematic diagram with upper and lower mould；
Figure 10 is that traditional square-section bar portion contacts schematic diagram with upper and lower mould.
Reference numeral：Forging body 1, flash 2, upper mold 3, lower die 4.
Specific embodiment
Forging section is mainly made of (see Fig. 1) forging body 1 and flash 2, and the forming process of forging undergoes three steps：
1. waste base upsetting formation；2. forging contacts mold bridge portion and further by resistance；3. forging is full of.Therefore pre- forging design
When, it is reasonable distribution different location deflection, it is necessary to be realized by optimizing cross section structure.
The design method of this patent is illustrated to be more clear, it is now large complicated with A-100 steel with typical undercarriage
The pre- forging design structure of forging part, is further described this patent.
Forging plays outer barrel forging for the large complicated master of certain model aircraft, is the high packet forging of long axis, forging bar portion is with zero
The unilateral high-volume 8~12mm of part shape is designed, and forging drawing is shown in Fig. 2.
As shown in Figure 3 and Figure 4, for the pre- forging of tradition using square-section design method, Fig. 5 is the pre- forging in traditional square section
Finish-forging process deflection distribution map, finish-forging process forging each position deflection differ greatly, and forging bar portion center portion deflection compared with
Small, effective deformation amount is 15%.
The pre- forging design method of this patent, includes the following steps：
Finish-forging part is designed according to the part shape to be forged；
According to the pre- forging that the structure design of finish-forging part simplifies, the cross sectional shape of pre- forging is diamond-shaped cross-section；
The numerical simulation forged, the pressure direction of forging are consistent with a diagonal of pre- forging diamond-shaped cross-section；
According to numerical simulation, pre- forging diamond-shaped cross-section size is adjusted, optimizes the deflection of forging each position to greatest extent,
It is made to tend to be uniform；
According to numerical simulation, pre- forging diamond-shaped cross-section size and pre- forging other positions size, reasonable distribution blocking are adjusted
Part deflection and finish-forging part deflection increase blocking and the finish-forging deformation of the large complicated forging part of undercarriage to greatest extent
Amount, and its different location deflection is made to tend to be uniform.
Specifically, diamond-shaped cross-section size is consistent with original rectangular pre- forging sectional dimension in the present embodiment；
The height of the diamond-shaped cross-section of the pre- forging of diamond-shaped cross-section is more than the height of d, wherein diamond-shaped cross-section for h, width d, and h
As diamond-shaped cross-section is parallel to cornerwise length in forging direction, and width is diamond-shaped cross-section perpendicular to the diagonal of forging direction
The length of line, and for ensure blocking and finish-forging stage deflection it is more uniform and ensure pre- forging be full of and finish-forging deformation
The forging defects such as the folding that process does not generate due to depth-width ratio is too big, the depth-width ratio of pre- forging diamond-shaped cross-section, which need to control, centainly to be compared
Within example, h and d meet relational expression：
1.36≤h/d≤1.56。
As shown in Figure 6 and Figure 7, pre- forging bar portion of the invention uses diamond-shaped cross-section design method, and Fig. 8 is using the present invention
Pre- forging design method deflection simulation and forecast figure.Wherein, forging bar portion center portion deflection is minimum, but has reached 25%,
While undercarriage bar portion deflection is increased, the deflection at each position of forging finish-forging process can be reduced, effectively improve forging
Structural homogenity so that differential grade≤3 grade of grain size of finish-forging part.
Figure 10 show traditional rectangular section bar portion and schematic diagram, pre- 3 He of forging pendulum material process upper mold is contacted with finish-forging part
The open height b of lower die 4 is 130mm, as shown in figure 9, pre- forging design method using the present invention, expected in pre- forging pendulum
The Cheng Shangmo 3 and open height a of lower die 4 is only 98mm, and the significantly reduction of the open height of upper mold 3 and lower die 4 prevents from forging
The blank that process occurs tilts and then realizes quick positioning, improves forging initial forging temperature, reduces the abrasion of finisher, reduces edge
The longitudinal folding defect of undercarriage bar portion.
The above embodiments merely illustrate the technical concept and features of the present invention, and its purpose is to be familiar with the technical field
Technical staff can not be limited the scope of the invention with this it will be appreciated that present disclosure and implement according to this.All
According to the equivalent changes or modifications made by spirit of the invention, should be covered by the protection scope of the present invention.
Claims (6)
- The pre- forging design method of the large complicated forging part of 1.A-100 steel, includes the following steps：Finish-forging part is designed according to the part shape to be forged；According to the pre- forging that the structure design of finish-forging part simplifies, the cross sectional shape of pre- forging is diamond-shaped cross-section；The numerical simulation forged, the forging direction of forging are consistent with a diagonal of pre- forging diamond-shaped cross-section；According to numerical simulation, pre- forging diamond-shaped cross-section size is adjusted, optimizes the deflection of forging each position to greatest extent, makes it Tend to be uniform；According to numerical simulation, pre- forging diamond-shaped cross-section size and pre- forging other positions size are adjusted, the pre- forging of reasonable distribution becomes Shape amount and finish-forging part deflection increase the blocking and finish-forging deflection of the large complicated forging part of undercarriage to greatest extent, And its different location deflection is made to tend to be uniform.
- 2. the pre- forging design method of the large complicated forging part of A-100 steel as described in claim 1, it is characterised in that：Pre- forging It is at least 20% per the deflection of fire to each position in the forging process of finish-forging part.
- 3. the pre- forging design method of the large complicated forging part of A-100 steel as claimed in claim 2, it is characterised in that：Pre- forging It is at least 25% per the deflection of fire to each position in the forging process of finish-forging part.
- 4. the pre- forging design method of the large complicated forging part of A-100 steel as described in claim 1, it is characterised in that：Finish-forging part Differential grade≤3 grade of grain size.
- 5. the pre- forging design method of the large complicated forging part of A-100 steel as described in claim 1, it is characterised in that：It is described pre- Cornerwise length that forging direction is parallel in the diamond-shaped cross-section of forging is h, perpendicular to the cornerwise length for forging direction For d, and h and d meet relational expression：1.36≤h/d≤1.56。
- The forging method of the large complicated forging part of 6.A-100 steel, which is characterized in that including any right in such as claim 1-5 It is required that the pre- forging design method of the large complicated forging part of A-100 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711473737.5A CN108188338B (en) | 2017-12-29 | 2017-12-29 | Undercarriage A-100 punching block forging process for fuel method and pre- forging design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711473737.5A CN108188338B (en) | 2017-12-29 | 2017-12-29 | Undercarriage A-100 punching block forging process for fuel method and pre- forging design method |
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| CN108188338A true CN108188338A (en) | 2018-06-22 |
| CN108188338B CN108188338B (en) | 2019-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790862A (en) * | 2020-07-21 | 2020-10-20 | 四川工程职业技术学院 | Method for controlling forging deformation of complex disc cake die forging |
| CN114160732A (en) * | 2021-12-15 | 2022-03-11 | 陕西宏远航空锻造有限责任公司 | Forging method of high-boss TC18 titanium alloy die forging |
| CN114260404A (en) * | 2021-12-22 | 2022-04-01 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Landing gear outer barrel rough blank and short-process manufacturing method thereof |
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| JPH11347680A (en) * | 1998-06-04 | 1999-12-21 | Sumitomo Metal Ind Ltd | Method for roll-forging shaft with step |
| JP2000144253A (en) * | 1998-11-11 | 2000-05-26 | Daido Steel Co Ltd | Manufacture of large forging excellent in strength and corrosion resistance |
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| JPH11347680A (en) * | 1998-06-04 | 1999-12-21 | Sumitomo Metal Ind Ltd | Method for roll-forging shaft with step |
| JP2000144253A (en) * | 1998-11-11 | 2000-05-26 | Daido Steel Co Ltd | Manufacture of large forging excellent in strength and corrosion resistance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790862A (en) * | 2020-07-21 | 2020-10-20 | 四川工程职业技术学院 | Method for controlling forging deformation of complex disc cake die forging |
| CN114160732A (en) * | 2021-12-15 | 2022-03-11 | 陕西宏远航空锻造有限责任公司 | Forging method of high-boss TC18 titanium alloy die forging |
| CN114260404A (en) * | 2021-12-22 | 2022-04-01 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Landing gear outer barrel rough blank and short-process manufacturing method thereof |
| CN114260404B (en) * | 2021-12-22 | 2023-11-28 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Landing gear outer cylinder rough blank and short-process manufacturing method thereof |
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