CN103464675A - Large-sized T-shaped plate forged piece forming method - Google Patents
Large-sized T-shaped plate forged piece forming method Download PDFInfo
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- CN103464675A CN103464675A CN2013104386533A CN201310438653A CN103464675A CN 103464675 A CN103464675 A CN 103464675A CN 2013104386533 A CN2013104386533 A CN 2013104386533A CN 201310438653 A CN201310438653 A CN 201310438653A CN 103464675 A CN103464675 A CN 103464675A
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Abstract
The invention discloses a forging method, in particular to a large-sized T-shaped plate forged piece forming method, which can improve the qualification rate of finished products and the forming efficiency. The large-sized T-shaped plate forged piece forming method comprises the steps of I) firstly performing ring piece forging, chamfering and bottom filing; II) then performing upsetting treatment and drawing-out treatment to obtain a thick T-shaped plate forged piece plate part profile and a rod part profile; III) cutting an intermediate billet, wherein the plate length L0 of the plate part profile is required to be 5 percent shorter than the length L of a final T-shaped plate forged piece product; IV) transversely drawing out the plate part profile only along the plate width B0 direction of the plate part profile by using a longitudinal upper flat anvil and a lower platform to form a plate part, wherein during drawing-out, the length direction of the longitudinal upper flat anvil is in parallel with the plate length L0 direction of the plate part profile; V) finally drawing out a rod part. The large-sized T-shaped plate forged piece forming method has the advantages that the pressing coverage area of the longitudinal upper flat anvil is reduced, the transverse breadth-height ratio (B/H) is reduced, the deformation force is reduced, the compaction ability is increased and the transient anvil-width ratio is larger than or equal to 0.4.
Description
Technical field
The present invention relates to a kind of forging method, especially a kind of large-sized T shaped plate forging forming method.
Background technology
T-shaped forging is with in being of producing at present, of a great variety, for bar shaped T shape part, can on a lot of methods, realize, but the tabular T shape part difference because of board width and gauge is too large, be subject to certain limitation on forging method, present many producers all adopt makes little T-shaped thick stock adopting jumping-up to be drawn into flat square billet, and board width and length dimension are pulled out to thickness and the whole size that T-shaped board obtains required forging through both direction repeatedly, and efficiency is low, flaw detection qualification rate is lower.
Conventional T shape plate shape Forging fabrication technique flow process: pressing tongs handle, chamfered edge, the wrong end → jumping-up, wide → upper and lower flat-anvils stretching plate of pulling → oxygen-acetylene cutting → drain cap (or other frock) pulling plate are grown (repeated multiple times) → extract bar section.Conventional T shape plate forging process for fuel technology like this exists following problem and defect:
1) complex operation: after forging intermediate blank, press L and pull out B on drain cap and between upper flat anvil in exhibition between upper and lower flat anvil to be shaped, wide plate is forged gradually, frock is frequently changed, and shaping and finishing fire are inferior many.
When 2) forging pulls out B on drain cap, the two sections intersection is more to strip material in drain cap, is the factors such as the water, rising head excision amount and the end round end that guarantee steel ingot is large, and the steel ingot utilization rate is controlled at 56% left and right mostly, belongs to reduced levels.
While 3) using common upper and lower flat-anvils stretching wide plate slab along L to, because plate width large (L<B), plastic force are large, can only be by reducing the amount of feeding, accomplish relatively instantaneous anvil width ratio ≈ 0.3～0.4, but this makes deformed area produce axial tension stress, and relative material at this moment is wide than B/H>3, because B/H is excessive, in the hydrostatic stress district, produce strong shear strain and stress, especially at the metal weakness, may near the horizontal symmetrical face of deformed area, produce violent detrusion face germinating stratiform transversal crack.Because a pulling can't put the width dimensions pulling in place, again the wide plate face is stood and expect pulling width dimensions B on drain cap, at this moment the blank leptoprosopy is consistent with the press force direction, and relative material at this moment is wide than B/H<0.3, because material is wide than too small, must cause forming horizontal tensile stress.So, have two to tension in deformed area, the compacting body is got to the effect of running counter to desire, now form the danger maximum of underbead crack, cause serious ultrasonic examination not conform to.The ratio of feed and blank end face height, be called relatively instantaneous anvil width ratio (or feed L/H) relatively, is called anvil width ratio W/H during full anvil; Expect wide ratio: the blank width B contacted with anvil face and the Central European ratio of blank height H are called the wide B/H of ratio of material.
4) because the fire that is shaped is inferior many, very easily make the easy gross grain and mixed grain of forging.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of large-sized T shaped plate forging forming method that improves product qualified rate and forming efficiency.
The present invention solves the large-sized T shaped plate forging forming method that its technical problem adopts, and comprises the following steps:
I, at first forging blank is carried out to pressing tongs, chamfered edge and the wrong end;
II, then carry out the jumping-up processing, then pull out and process board profile and the bar contouring that obtains thick T-shaped plate forging;
III, cut intermediate blank again, make the long L of plate of board profile
0need differ 4～6% with the length L of final T-shaped plate forging products;
IV, then utilize vertically upper flat anvil and lower platform only along the wide B of the plate of board profile
0direction pulling board profile, thus the moulding board, when pulling, is vertically gone up the length direction of flat anvil and the long L of plate of board profile
0direction is parallel;
V, finally extract bar section.
Further, in the III step, make the long L0 of plate of board profile differ 5% with the length L of final T-shaped plate forging products.
Further, in the III step, adopt gas cutting intermediate blank.
Further, in the IV step, the instantaneous anvil width ratio of pulling >=0.4.Make the instantaneous relative anvil width ratio of pulling >=0.4 by controlling the amount of feeding.
The invention has the beneficial effects as follows:
A. laterally pulling out of this method widely compared with now methodical vertical pulling, its vertically upper flat anvil compacting area coverage reduces, laterally material is wide relatively reduces than B/H, makes to have reduced deformation force, increases compaction capacity, guarantee that again its deformed region is without tension, therefore can improve product qualified rate.
B. according to the rule of metal flow, because press power is put (plate thickness direction) to good use in a direction, guarantee in whole deformation process to form comparatively favourable deformation mechanism, distortion is mainly extended towards the needs direction, prevented not only the matrix of compacting but also the possibility of again being pulled open.
C. because material is wide still larger than B/H<2.5 relatively, in the hydrostatic stress district, can produce strong shear strain and center tension, therefore make the long L of the plate of board profile on technique
0need differ 5% with the length L of final T-shaped plate forging products, relatively instantaneous anvil width ratio is implemented exhibition by>=0.4 control and is pressed, and simplifies the operation, and the center of realizing again is shaftless to action of pulling stress.
D. and the strict single face drafts (adopting the small deformation amount) of controlling, to two sides in accordance with regulations drafts evenly exert pressure, make, near the horizontal symmetrical face of deformation plance, can not produce violent detrusion, prevented again the germinating in stratiform transversal crack source.
The accompanying drawing explanation
Fig. 1 is that forging blank is carrying out pressing tongs handle, chamfered edge and schematic diagram at the wrong end;
Fig. 2 is the forging blank schematic diagram after jumping-up;
Fig. 3 is the forging blank schematic diagram after pulling;
Fig. 4 is the forging blank schematic diagram after the cutting intermediate blank;
Fig. 5 is the schematic diagram when carrying out the IV step;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is that schematic diagram is pressed in the forging blank exhibition of carrying out the IV step;
Fig. 8 is that the prior art drain cap pulls out schematic diagram when wide;
Fig. 9 is the long schematic diagram of the upper and lower flat-anvils stretching plate of prior art;
Figure 10 is the schematic diagram of T-shaped plate forging;
Figure 11 is the left view of Figure 10;
Parts, position and numbering in figure: board profile 1, bar contouring 2, forging blank 3, vertically go up the long L of plate of flat anvil 4, lower platform 5, upper flat anvil 6, drain cap 7, the wide B of plate, the long L of plate, thickness H, board profile
0, the board profile the wide B of plate
0, the board profile plate hight H
0.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The present invention includes following steps:
I, at first forging blank is carried out to pressing tongs, chamfered edge and the wrong end; Forging blank 3 after this step process is shown in Figure 1.
II, then carry out the jumping-up processing, the forging blank 3 after jumping-up is processed is shown in Figure 2; Pull out again and process board profile 1 and the bar contouring 2 that obtains thick T-shaped plate forging.
III, cut intermediate blank again, main resection forceps generally adopt gas cut to get final product, the long L0 of plate of assurance board profile need differ 4～6% with the length L of final T-shaped plate forging products, is preferably 5%; Shown in Figure 3.
IV, then utilize vertically upper flat anvil and lower platform along the wide B0 direction pulling of the plate of board profile 1 board profile 1, thus moulding board 8, and when pulling, the length direction of vertically going up flat anvil is parallel with the long L0 direction of the plate of board profile 1; Shown in Fig. 5, Fig. 6 and Fig. 7.
V, finally extract bar section 9.
The long L of the plate of board profile
0, the board profile the wide B of plate
0and the plate hight H of board profile
0be variable, change along with the carrying out of Forging Technology, finally form the long L of plate, the wide B of plate and the thickness H of product.
With 7 pullings of existing drain cap, plate is wide compares, the wide instantaneous anvil width ratio of pulling plate of the present invention is larger, contrast referring to Fig. 7 and Fig. 9, the wide anvil width ratio of existing drain cap 7 pulling plate is ≈ 0.3～0.4, and anvil width ratio of the present invention is >=0.4, due to T-shaped plate board B>L, therefore required press power is laborsaving many.Separately because prior art drain cap 7 pulls out, plate is wide vertically to be pulled out forging blank 3, and it is subject to stress can be shown in Figure 8, causes forming horizontal tensile stress, forms dangerous maximum underbead crack.And the present invention is parallel with the long L direction of the plate of board profile due to the length direction of vertically upper flat anvil, exert pressure and only launch in direction of thickness H, therefore can when compacting, carry out easily.Principle according to plasticity rigidity mechanics: deformed area central point axial tension stress depends on relatively instantaneous anvil width ratio, increase with anvil width ratio, the basic theory that axial tension stress reduces gradually, in conjunction with NFM method in the principle of plasticity rigidity mechanics: anvil width ratio W/H >=0.4, can realize the basic ideas without the center axial tension stress, the present invention program has selected vertically to go up flat anvil 4, lower platform 5, adopt vertically upper flat anvil 4 laterally to pull out, extract the wide B direction of plate size, and by the field control feed instantaneous relative anvil width ratio is controlled at >=0.4, shaftless to action of pulling stress with the center of realizing.Due in conjunction with firm plasticity theory, therefore improve stress condition, obtain good result of detection, reduced again the large difficulty of deformation force of bringing because of the pulling wide plate.Now, the shaping of T shape shape Forging just is easy to be achieved.
In IV, method of the present invention does not need to pull out the long L direction of plate, but complete the pulling of the long L direction of plate in the pulling technique of II, rule according to the Plastic Forming metal flow, due to press power, in a direction, put to good use (plate thickness H direction), guaranteed to form comparatively favourable deformation mechanism in whole deformation process, made distortion (the wide B direction of plate) extension in the same direction as.And existing technique needs that drain cap 7 pulling plates are wide and upper and lower flat-anvils stretching plate is long repeatedly carries out, pull out that plate is wide and the pulling plate is long repeatedly carries out, adopt the final size of control, increased the possibility that the matrix of compacting is pulled open again again.Known by contrasting, it is to carry out in two steps with pulling out plate length that the present invention pulls out plate wide, is independent of each other between the two, and its fire is inferior less.And have technique now, at the wide B of pulling plate, forging blank 3 need to be erect, the pulling plate need forging blank 3 to keep flat when long, and two operations influence each other, and need to repeatedly carry out, and its fiery time more.And the present invention is wide without using drain cap 7 pulling plates, therefore there is no drain cap 7 two sections intersections to the more situation of the interior strip material of drain cap 7, therefore can significantly improve raw material availability.
Be shaped to example with the T-shaped plate forging of 1Cr18Ni9Ti material, contrast the present invention and prior art, the present invention has following advantage:
1) from result of detection, the large-scale T shape plate forging of the difficult-to-deformation material 1Cr18Ni9Ti that adopts the present invention to produce, the disposable qualification rate of detecting a flaw is brought up to more than 85% by 55% of prior art, the flaw detection quality of T shape plate forging has been had to the change of essence.
2) utilize universal fixture, easy and simple to handle, 7 fire are brought up to 4 fire, work efficiency improves nearly one times.
Produce violent detrusion while 3) having avoided forging wide panel-like member, prevented the germinating in stratiform transversal crack source.Simultaneously, form horizontal tensile stress while having avoided again pulling board width, produce transversal crack
4) the steel ingot utilization rate is brought up to 60% left and right.
5) each cross section completes distortion in same fire is inferior, more is conducive to refinement and the uniform crystal particles of crystal grain.
Claims (4)
1. large-sized T shaped plate forging forming method is characterized in that: comprise the following steps:
I, at first forging blank is carried out to pressing tongs, chamfered edge and the wrong end;
II, then carry out the jumping-up processing, then pull out and process board profile and the bar contouring that obtains thick T-shaped plate forging;
III, cut intermediate blank again, make the long L of plate of board profile
0need differ 4～6% with the length L of final T-shaped plate forging products;
IV, then utilize vertically upper flat anvil and lower platform only along the wide B of the plate of board profile
0direction pulling board profile, thus the moulding board, when pulling, is vertically gone up the length direction of flat anvil and the long L of plate of board profile
0direction is parallel;
V, finally extract bar section.
2. large-sized T shaped plate forging forming method as claimed in claim 1, is characterized in that: in the III step, make the long L of plate of board profile
0need differ 5% with the length L of final T-shaped plate forging products.
3. large-sized T shaped plate forging forming method as claimed in claim 1, is characterized in that: in the III step, adopt gas cutting intermediate blank.
4. as claim 1,2 or 3 described large-sized T shaped plate forging forming methods, it is characterized in that: in the IV step, the instantaneous anvil width ratio of pulling >=0.4.
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|---|---|---|---|
| CN201310438653.3A CN103464675B (en) | 2013-09-24 | 2013-09-24 | Large-sized T-shaped plate forged piece forming method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945190A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Free forging technology of large-scale module |
| CN106345952A (en) * | 2016-08-26 | 2017-01-25 | 中国商用飞机有限责任公司 | Manufacturing method and manufacturing tooling for T-type forgings |
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| EP0054522A2 (en) * | 1980-12-17 | 1982-06-23 | ALGAT S.p.A. | Process for the manufacture of hinges, particularly for vehicle doors |
| JP2000301283A (en) * | 1999-04-14 | 2000-10-31 | Hmy Ltd | Production method of discharge vane blade for super- charger of automobile amd vane blade |
| CN101314202A (en) * | 2008-06-02 | 2008-12-03 | 江阴振宏重型锻造有限公司 | Method for producing wind-electricity principal axis with gathering stock full fibre upset forging |
| CN201201029Y (en) * | 2008-06-02 | 2009-03-04 | 江阴振宏重型锻造有限公司 | Movable turntable for producing wind power main spindle by up-setting all fiber upsetting |
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| CN102873237A (en) * | 2012-10-17 | 2013-01-16 | 西南铝业（集团）有限责任公司 | T-shaped forge piece blank-manufacturing processing technology and device thereof |
| CN202701243U (en) * | 2012-07-24 | 2013-01-30 | 太原重工股份有限公司 | Upsetting tool of forging press |
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2013
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0054522A2 (en) * | 1980-12-17 | 1982-06-23 | ALGAT S.p.A. | Process for the manufacture of hinges, particularly for vehicle doors |
| JP2000301283A (en) * | 1999-04-14 | 2000-10-31 | Hmy Ltd | Production method of discharge vane blade for super- charger of automobile amd vane blade |
| JP2009090366A (en) * | 2007-10-12 | 2009-04-30 | Kondoo Seikoo Kk | Method for manufacturing plate by cold forging |
| CN101314202A (en) * | 2008-06-02 | 2008-12-03 | 江阴振宏重型锻造有限公司 | Method for producing wind-electricity principal axis with gathering stock full fibre upset forging |
| CN201201029Y (en) * | 2008-06-02 | 2009-03-04 | 江阴振宏重型锻造有限公司 | Movable turntable for producing wind power main spindle by up-setting all fiber upsetting |
| CN202701243U (en) * | 2012-07-24 | 2013-01-30 | 太原重工股份有限公司 | Upsetting tool of forging press |
| CN102873237A (en) * | 2012-10-17 | 2013-01-16 | 西南铝业（集团）有限责任公司 | T-shaped forge piece blank-manufacturing processing technology and device thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945190A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Free forging technology of large-scale module |
| CN106345952A (en) * | 2016-08-26 | 2017-01-25 | 中国商用飞机有限责任公司 | Manufacturing method and manufacturing tooling for T-type forgings |
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| CN103464675B (en) | 2015-06-17 |
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Effective date of registration: 20180315 Address after: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee after: Double (Deyang) heavy equipment Co., Ltd. Address before: Deyang City, Sichuan Province, the Pearl River West Road 618013 Jingyang District No. 460 Patentee before: Erzhong Group (Deyang) Heavy Equipment Co., Ltd. |
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