CN106799423B - The eccentric forming device and method of bowl-type thin-wall part - Google Patents
The eccentric forming device and method of bowl-type thin-wall part Download PDFInfo
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- CN106799423B CN106799423B CN201710033224.6A CN201710033224A CN106799423B CN 106799423 B CN106799423 B CN 106799423B CN 201710033224 A CN201710033224 A CN 201710033224A CN 106799423 B CN106799423 B CN 106799423B
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- cavity plate
- punch
- pin
- axial line
- bowl
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Classifications
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- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- 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
-
- 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
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
Abstract
The present invention relates to a kind of eccentric forming device of bowl-type thin-wall part and methods; wherein; device includes horizontal positioned cavity plate; and above cavity plate inclined arrangement punch-pin; angle γ is formed between the axial line of the punch-pin and the axial line of cavity plate; the cavity plate, punch-pin surround respective axial line rotation, have offset distance L between the axial line of the cavity plate and the axial line of punch-pin, and the punch-pin along the vertical axis after offset distance L carries out decline molding or rise that mould is divided to move with cavity plate；When punch-pin decline molding close with cavity plate, punch-pin lower section is in cavity plate die cavity and cooperates to the prefabricated blank progress continuously shaped processing of localized contact in die cavity.Present invention greatly enhances stock utilizations, reduce production cost, improve part forming precision, and shaping load is only 1/15-the 1/30 of conventional method, are 1/2-the 1/5 of common continuous and local loading method；And crystal grain can be refined, there is excellent performance.
Description
Technical field
The present invention relates to Materials Processing Engineering metal forming technical field, in particular to a kind of bowl-type thin-wall part it is inclined
Heart forming device and method.
Background technique
Bowl-type Thin-wall Revolving Part has important application in fields such as aerospaces.Based on metal plasticity at room temperature
The features such as difference, intensity are high, and elasticity modulus is small, and thermal conductivity is low, and resistance of deformation is big, so that this kind of part forming tonnage is big, metal is returned
Bullet is serious, and wall thickness control is difficult, requires production equipment high.Therefore for now, such part mostly uses free forging,
Part is largely wasted added with larger surplus, material, subsequent machining somewhat expensive.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of low loads, the bias of forming accurately bowl-type thin-wall part
Forming device and method.
Realize that technical scheme is as follows:
The eccentric forming device of bowl-type thin-wall part, including horizontal positioned cavity plate, and the inclined cloth above cavity plate
The punch-pin set forms angle γ between the axial line of the punch-pin and the axial line of cavity plate, the cavity plate, punch-pin are around respective
Axial line rotation has offset distance L between the axial line of the cavity plate and the axial line of punch-pin, the punch-pin is along offset distance
From the vertical axis after L carry out decline molding with cavity plate or rise that mould is divided to move；It is convex when punch-pin decline molding close with cavity plate
It is in cavity plate die cavity and cooperates below mould and the continuously shaped processing of localized contact is carried out to the prefabricated blank in die cavity.
Having offset distance L between the axial line of the cavity plate and the axial line of punch-pin is 1-200mm.Offset distance L is got over
Greatly, shaping load is smaller.
The eccentric manufacturing process of bowl-type thin-wall part, includes the following steps,
Pole segmentation is sawn into biscuit by S1；
S2 carries out the heat preservation for being heated to forging temperature and carrying out 1-4 hours to biscuit；
Taper prefabricated blank is made in biscuit by S3 in prefabricated mould；
Taper prefabricated blank is placed horizontally in cavity plate by S4, and the conical section of taper prefabricated blank is in top, and cavity plate is around certainly
The axial line of body is rotated, and punch-pin is carried out along with the decline of the vertical axis direction of cavity plate axial line offset distance L with cavity plate
Molding；After punch-pin is contacted with taper prefabricated blank, cavity plate drives prefabricated blank to rotate around cavity plate axial line, and prefabricated blank drives punch-pin edge
Its axial line is rotated, and obtains bowl-type thin-wall part to carry out the continuously shaped processing of localized contact to prefabricated blank；Prefabricated blank at
Type process metal is done spiral movement, and is conducive to the radial direction and tangential flowing of prefabricated blank metal, to guarantee precisely to shape and keep away
Exempt from the destruction to metal structure.
S5, after forming, punch-pin, which rises, to be resetted, and the bowl-type thin-wall part of forming is taken out from cavity plate, using finishing
Work just obtains bowl-type thin-wall part finished product.
The taper prefabricated blank is that upper surface is plane, and top periphery forms the bullet of the conical surface.It is loaded in continuous and local
In forming process, punch-pin and work piece contact zone are easier to that tangential and radial metal plastic deformation occurs, and are easy to appear " mushroom effect ",
The form of mushroom head is easy to appear i.e. in process above workpiece, leads to the problem of forming accuracy difference；And biscuit is prefabricated into
Taper base can make axial, tangential and radial flow velocity balanced, avoid " mushroom effect "；Punch-pin and blank start to contact rank simultaneously
Section contact area reduces, and is conducive to reduce the friction between mold and workpiece blank, improves die life.
The amount of feeding of the punch-pin decline molding is 2-20mm/rad.Avoid because of the punch-pin amount of feeding more significantly, needs to increase
Big load needed for overcoming flow of metal resistance.
The outer diameter and wall-thickness ratio of the bowl-type thin-wall part of acquisition are 10-40.
Using above-mentioned technical proposal, i.e., continuous eccentric local loading and shaping realizes the large-scale bowl under the conditions of low load
Type thin-wall part Accurate Shaping.Continuous bias local loading and shaping refers to: in forming process, punch-pin axle center and cavity plate axle center are inclined
It mutually forms an angle after moving certain distance, the perspective plane localized contact that punch-pin and workpiece are formed, punch-pin, cavity plate and blank rotation make
Partial contact zones are obtained constantly to change；When contact zone rotates a circle, that is, a loading and unloading period is completed, multiple weeks are passed through
Phase CYCLIC LOADING, to realize workpiece monolithic molding.For its feature, unilateral surplus can be controlled in 1-4mm, greatly mentions
High stock utilization, reduces production cost, improves part forming precision, shaping load is only the 1/ of conventional method
15-1/30, it is 1/2-the 1/5 of common continuous and local loading method；And crystal grain can be refined, there is excellent performance.
Compared with the prior art, the present invention has the following advantages:
(1) the invention patent uses continuous eccentric local loading method, can be realized raw on rated load 1600t press
The thin-walled bowl-type part of 500-1500mm of opening diameter is produced, shaping load is only 1/15-the 1/30 of traditional handicraft, is common continuous
1/2-the 1/5 of local loading method.
(2) accurate size of thin-walled bowl-type part prepared by the present invention, unilateral surplus control are solved in 1-4mm because of rebound
Wall thickness technical problem rambunctious caused by serious is especially suitable for production titanium alloy, steel alloy class large size bowl-type thin-wall part.
(3) method of the invention is suitable for the preparation of heavy caliber (500-1500mm) thin-walled bowl-type part, has in forming process
Biggish deflection can effectively refine crystal grain, and can be avoided the crackle occurred when large deformation, folding, overheat the defects of.
Detailed description of the invention
Fig. 1 is eccentric forming device structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of taper prefabricated blank in the present invention；
Fig. 3 is status diagram of the prefabricated blank of the invention shaped in eccentric forming device when deflection 30%；
Fig. 4 is the mirco structure figure that the method for the present invention obtains 30CrMnSiA steel alloy bowl-type thin-wall part.
In attached drawing, 1 is punch-pin, and 2 be die cavity, and 3 be bowl-type thin-wall part, and 4 be cavity plate, and 5 be mandril.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1-3, the eccentric forming device of bowl-type thin-wall part, including horizontal positioned cavity plate 4, and is in cavity plate
The punch-pin 1 of the inclined arrangement in top, forms angle γ between the axial line of punch-pin and the axial line of cavity plate, angle γ can be
It is selected in 3 ° -12 ° sections, cavity plate, punch-pin surround respective axial line rotation, the axial line of cavity plate and the axle center of punch-pin
There is offset distance L, punch-pin carries out decline molding or rise to divide mould along the vertical axis after offset distance L with cavity plate between line
Movement；When punch-pin decline molding close with cavity plate, punch-pin lower section is in cavity plate die cavity and cooperates to the prefabricated blank in die cavity 2
Carry out the continuously shaped processing of localized contact.Having offset distance L between the axial line of cavity plate and the axial line of punch-pin is 1-
200mm.The rotation speed of punch-pin is selected in the section 30-100rad/min.
The eccentric manufacturing process of bowl-type thin-wall part, includes the following steps,
Pole segmentation is sawn into biscuit by S1；
S2 carries out the heat preservation for being heated to forging temperature and carrying out 1-4 hours to biscuit；
Taper prefabricated blank is made in biscuit by S3 in prefabricated mould；
Taper prefabricated blank is placed horizontally in cavity plate by S4, and the conical section of taper prefabricated blank is in top, and cavity plate is around certainly
The axial line of body is rotated, and punch-pin is carried out along with the decline of the vertical axis direction of cavity plate axial line offset distance L with cavity plate
Molding；After punch-pin is contacted with taper prefabricated blank, cavity plate drives prefabricated blank to rotate around cavity plate axial line, and prefabricated blank drives punch-pin edge
Its axial line is rotated, and obtains bowl-type thin-wall part 3 to carry out the continuously shaped processing of localized contact to prefabricated blank；
S5, after forming, punch-pin, which rises, to be resetted, and the bowl-type thin-wall part of forming is taken out from cavity plate, using finishing
Work just obtains bowl-type thin-wall part finished product.
The taper prefabricated blank is that upper surface is plane, and top periphery forms the bullet of the conical surface.
The amount of feeding of the punch-pin decline molding is 2-20mm/rad.
The outer diameter and wall-thickness ratio of the bowl-type thin-wall part of acquisition are 10-40.
With reference to embodiment, present invention is described.
Embodiment one: the present invention program is at home in existing 1600 t hydraulic press equipment, using continuous eccentric part
Loading method, being successfully prepared diameter is 700mm, height 130mm, and wall thickness is the bowl-type thin-wall part of 20mm.Bowl-type thin-wall part material
Material is TC4, has been achieved with batch production at present.The bowl-type thin-wall part the specific process is as follows:
1) angle γ is formed between the axial line of punch-pin and the axial line of cavity plate, the axial line and cavity plate axial line of punch-pin are inclined
Moving distance is 100mm, and punch-pin and cavity plate can be rotated around self-axis line.
2) TC4 bar is segmented according to the biscuit at φ 300mm × 142mm.
3) biscuit is heated to 910 DEG C (this batch of TC4 bar transformation temperature is 1000 DEG C), keeps the temperature 2h.
4) biscuit, which is transferred in prefabricated mould, after heating is made taper prefabricated blank；
5) taper prefabricated blank is transferred to concave die cavity, starts motor, punch-pin and cavity plate close to molding, punch-pin and prefabricated blank office
With the driven rotation of the amount of feeding of 10mm/rad until forming, finally ejects bowl-type thin-wall part forging stock after portion's contact.
6) forging stock after shaping obtains bowl-type thin-wall part finished product by finishing.
The forming accuracy of this bowl-type thin-wall part is high, and the unilateral surplus of bowl-type thin-wall part is 2-3mm；Shaping load is small, and forming carries
Lotus is 1/25 or so of traditional handicraft load in 600-700t.
Embodiment two
Using continuous eccentric local loading method, preparing diameter is 560mm, height 150mm, and wall thickness is that the bowl-type of 18mm is thin
Wall pieces.Bowl-type thin-wall part material is 30CrMnSiA, has been achieved with batch production at present.The bowl-type thin-wall part the specific process is as follows:
1) angle γ is formed between the axial line of punch-pin and the axial line of cavity plate, the axial line and cavity plate axial line of punch-pin are inclined
Moving distance is 70mm, and punch-pin and cavity plate can be rotated around self-axis line.
2) bar is segmented according to the biscuit at φ 250mm × 130mm.
3) biscuit is heated to 1050 DEG C, keeps the temperature 2h.
4) biscuit, which is transferred in prefabricated mould, after heating is made taper prefabricated blank；
5) taper prefabricated blank is transferred to concave die cavity, starts motor, punch-pin and cavity plate close to molding, punch-pin and prefabricated blank office
With the driven rotation of the amount of feeding of 15mm/rad until forming, finally ejects bowl-type thin-wall part forging stock after portion's contact.
6) forging stock after shaping obtains bowl-type thin-wall part finished product by finishing.
The forming accuracy of this bowl-type thin-wall part is high, and the unilateral surplus of bowl-type thin-wall part is 1.5mm or so；Shaping load is small, at
Shape load is 1/20 or so of traditional handicraft load in 350-480t；The grain size of 30CrMnSiA steel alloy reach 9 grades with
On, as shown in Figure 4.
Claims (1)
1. the eccentric forming device of bowl-type thin-wall part, including horizontal positioned cavity plate, and the inclined arrangement above cavity plate
Punch-pin, between the axial line of the punch-pin and the axial line of cavity plate formed angle γ, the cavity plate, punch-pin surround respective axis
Heart line rotation, which is characterized in that there is offset distance L, the punch-pin between the axial line of the cavity plate and the axial line of punch-pin
Along the vertical axis after offset distance L carry out decline molding with cavity plate or rise that mould is divided to move；When punch-pin decline and cavity plate
When close to molding, below punch-pin in cavity plate die cavity and cooperate to the prefabricated blank in die cavity carry out localized contact it is continuously shaped plus
Work；
Having offset distance L between the axial line of the cavity plate and the axial line of punch-pin is 1-200mm；
The eccentric manufacturing process of bowl-type thin-wall part, includes the following steps,
Pole segmentation is sawn into biscuit by S1；
S2 carries out the heat preservation for being heated to forging temperature and carrying out 1-4 hours to biscuit；
Taper prefabricated blank is made in biscuit by S3 in prefabricated mould；
Taper prefabricated blank is placed horizontally in cavity plate by S4, and the conical section of taper prefabricated blank is in top, cavity plate around itself
Axial line is rotated, and punch-pin is closed along with the decline of the vertical axis direction of cavity plate axial line offset distance L with cavity plate
Mould；After punch-pin is contacted with taper prefabricated blank, cavity plate drives prefabricated blank to rotate around cavity plate axial line, and prefabricated blank drives punch-pin along it
Axial line is rotated, and obtains bowl-type thin-wall part to carry out the continuously shaped processing of localized contact to prefabricated blank；
S5, after forming, punch-pin, which rises, to be resetted, and the bowl-type thin-wall part of forming is taken out from cavity plate, using finishing, just
Obtain bowl-type thin-wall part finished product；
The taper prefabricated blank is that upper surface is plane, and top periphery forms the bullet of the conical surface；
The amount of feeding of the punch-pin decline molding is 2-20mm/rad；
The outer diameter and wall-thickness ratio of the bowl-type thin-wall part of acquisition are 10-40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033224.6A CN106799423B (en) | 2017-01-18 | 2017-01-18 | The eccentric forming device and method of bowl-type thin-wall part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710033224.6A CN106799423B (en) | 2017-01-18 | 2017-01-18 | The eccentric forming device and method of bowl-type thin-wall part |
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| CN106799423A CN106799423A (en) | 2017-06-06 |
| CN106799423B true CN106799423B (en) | 2019-03-22 |
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| CN110479838B (en) * | 2019-08-02 | 2020-09-01 | 武汉理工大学 | Split type space enveloping forming method for bottom of ultra-large thin-wall integral storage tank |
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| CN101927283A (en) * | 2009-06-19 | 2010-12-29 | 江都东升机械制造有限公司 | Method for machining bowl and dish-shaped workpieces |
| CN102284609A (en) * | 2011-06-14 | 2011-12-21 | 北京机电研究所 | Swing head device for realizing motion path of multi-leaf rose line without passing through central point |
| CN104439009A (en) * | 2014-12-11 | 2015-03-25 | 西安东耘新金属材料有限公司 | Axial closed rolling forming equipment |
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| CN105414422A (en) * | 2015-12-03 | 2016-03-23 | 常州和仕达机械装备制造有限公司 | Gear axial direction closed type spreading molding process |
| CN105964859A (en) * | 2016-04-22 | 2016-09-28 | 中北大学 | Uniform upsetting forming die of high height-diameter-ratio magnesium alloy bar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384571C (en) * | 2006-03-15 | 2008-04-30 | 胡长安 | Method and apparatus for producing materials of double metal shaft sleeve parts |
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2017
- 2017-01-18 CN CN201710033224.6A patent/CN106799423B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3929963A1 (en) * | 1989-09-08 | 1991-03-14 | Fritz Stahlecker | Rotor for open=end spinning - has weft formation groove reduced for fine counts |
| CN101147951A (en) * | 2007-11-13 | 2008-03-26 | 成都市新筑路桥机械股份有限公司 | Rolling preparation method for thick-walled and thin-bottomed basin parts |
| CN101927283A (en) * | 2009-06-19 | 2010-12-29 | 江都东升机械制造有限公司 | Method for machining bowl and dish-shaped workpieces |
| CN102284609A (en) * | 2011-06-14 | 2011-12-21 | 北京机电研究所 | Swing head device for realizing motion path of multi-leaf rose line without passing through central point |
| CN104439009A (en) * | 2014-12-11 | 2015-03-25 | 西安东耘新金属材料有限公司 | Axial closed rolling forming equipment |
| CN104439033A (en) * | 2014-12-11 | 2015-03-25 | 西安东耘新金属材料有限公司 | Axial closed rolling forming method |
| CN105414422A (en) * | 2015-12-03 | 2016-03-23 | 常州和仕达机械装备制造有限公司 | Gear axial direction closed type spreading molding process |
| CN105964859A (en) * | 2016-04-22 | 2016-09-28 | 中北大学 | Uniform upsetting forming die of high height-diameter-ratio magnesium alloy bar |
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