CN110193556A - For manufacturing the mold and its manufacturing method of stretch bending profile - Google Patents
For manufacturing the mold and its manufacturing method of stretch bending profile Download PDFInfo
- Publication number
- CN110193556A CN110193556A CN201810162280.4A CN201810162280A CN110193556A CN 110193556 A CN110193556 A CN 110193556A CN 201810162280 A CN201810162280 A CN 201810162280A CN 110193556 A CN110193556 A CN 110193556A
- Authority
- CN
- China
- Prior art keywords
- sectional material
- mold
- material blank
- easy fracture
- profile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- B21D53/00—Making other particular articles
- B21D53/92—Making other particular articles other parts for aircraft
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
- B21D7/0225—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only using pulling members
Abstract
The present invention relates to a kind of for manufacturing the mold and its manufacturing method of stretch bending profile.The profile contacted with sectional material blank for constituting the stretch bending process of the sectional material blank of profile and the mold of the configuration for constituting profile is determined according to the configuration of desired profile, sectional material blank easy fracture region and non section steel blank easy fracture region on profile are obtained according to the edge analysis of the stretch bending process of sectional material blank and mold, frictional force wherein in sectional material blank easy fracture region between sectional material blank and mold is larger, wherein, for on mold sectional material blank easy fracture region and non section steel blank easy fracture region implement the measure of different reduction frictional force, so that sectional material blank is approximately uniform with frictional force of the mold at sectional material blank easy fracture region and non section steel blank easy fracture region.Thus it overcomes during traditional stretch bending, locally extension is uneven for sectional material blank, eventually leads to the defect that whole stretch bending is not in place, part rebound is serious or is broken.
Description
Technical field
The manufacturing method of the mold and the mold that the present invention relates to a kind of for manufacturing stretch bending profile.
Background technique
In the prior art, profile is manufactured by stretch bending process or part is common technological means.Especially flying
In the manufacture of machine part, the parts such as frame costal margin item, stringer are all that the variable curvature extrudate that size is big, relative bending radius is big is curved
Bent part generallys use stretch wrap forming technique.
During stretch bending, usually one or two end of the sectional material blank of for example, metal material is fixed
And stretch, during stretching according to desired profile configuration use with respective profile mold, by sectional material blank with
The direct contact of mold is so that sectional material blank deforms and assigns its specific shape.
In stretch bending sectional material blank, the stress state of each section is different in deformed area.Specifically, among cross section
Indeformable part is known as neutral line；Material tension stress effect on the outside of neutral line, generates elongation strain；On the inside of neutral line
The effect of metal compression chord, generates compressive deformation.Since the stress and strain of neutral line two layers of material is contrary, when load is unloaded
After going, the sprung back of neutral line two layers of material is contrary, causes different degrees of spring-go.Although stretch bending deformation only limits
In the regional area of material, but spring-go effect will affect the precision of bool.There are many influence factor of spring-go in practice, and this
A little factors are difficult to control, the stretch bending part precision problem as caused by spring-go, are always the key of stretch wrap forming production.
In the stretch bending technique using mold, since sectional material blank is directly contacted with mold, the portion in stretch bending deformation
Subregional frictional force is very big, and material is prevented to flow, and ultimately causes profile fracture, this part is also referred to as easy fracture position, with
The region of corresponding mold be referred to as profile easy fracture region.For this purpose, common solution is in mold and sectional material blank
Between be directly coated with lubricating oil, by reduce coefficient of friction, reduce stretch bending during because sliding friction generate resistance, promote material
Stream is dynamic, improves forming effect.
However, this solution is primarily present two defects: the lubricant effect of lubricating oil is not ideal enough, multiple for large size
Miscellaneous profile parts, still stretch bending is not in place, and rebound is big；During stretch bending, different parts frictional force is different, causes to prolong
It is uneven to stretch rate, in a mold between, fracture is easy to produce at both ends and jaw, and part rebound is bigger than normal.The master of these defects
Wanting reason mainly has two aspects.On the one hand it is only lubricated by lubricating oil, frictional force is still very big, and still prevention material flows；
On the other hand, during stretch bending, the frictional force of different zones is different, causes the extension of blank uneven, locally prolongs
It is excessive to stretch rate, and then is broken, and remaining position elongation percentage is too small, rebound is serious.
Therefore, it in traditional stretch bending technique, is broken in order to prevent, elongation percentage is set generally according to empirical value, it is right
The rebound of the part caused by elongation percentage is too small, relies primarily on the subsequent manual school shape on mold, the position not in place to forming
Further forming, is finally reached the configuration requirements of part.But a large amount of manual school shape not only great work intensity, but also can be zero
Part surface, which generates, taps trace, and influences surface quality of workpieces.
Summary of the invention
Based on the above prior art, the present invention proposes a kind of manufacturing method of the mold for manufacturing stretch bending profile of optimization
And a kind of mold for being used to manufacture stretch bending profile of optimization, it thus overcomes during traditional stretch bending, profile
Locally extension is uneven for blank, eventually leads to the defect that whole stretch bending is not in place, part rebound is serious or is broken.
In order to realize the above goal of the invention, according to the present invention for manufacturing the manufacturing method of the mold of stretch bending profile
In, the stretch bending process and use for constituting the sectional material blank of the profile are determined according to the configuration of the desired profile
In the profile of the mold for the configuration for constituting the profile contacted with the sectional material blank, according to the stretch bending mistake of the sectional material blank
The edge analysis of journey and the mold obtains sectional material blank easy fracture region and non section steel blank easy fracture on the profile
Region, wherein the frictional force described in sectional material blank easy fracture region between sectional material blank and the mold is larger,
In, it is that different subtract is implemented in the sectional material blank easy fracture region and the non section steel blank easy fracture region on the mold
The measure of less friction, so that the sectional material blank and the mold are in sectional material blank easy fracture region and the non section steel
Frictional force at blank easy fracture region is approximately uniform.
A kind of optimal technical scheme according to the present invention applies rolling friction measure in sectional material blank easy fracture region,
The rolling friction measure is, for example, the first cylindrical roller.Lubricating oil can extraly be applied on the first cylindrical roller.
A kind of optimal technical scheme according to the present invention applies sliding friction measure in non section steel blank easy fracture region,
Such as apply lubricating oil.
A kind of optimal technical scheme according to the present invention can also apply rolling friction in non section steel blank easy fracture region
Measure, such as the second cylindrical roller, wherein the coefficient of friction of the rolling friction measure, which is greater than, is applied to the easily broken split plot of sectional material blank
The friction system of rolling friction measure in domain.For example, the two can be to have cylindrical roller made of different materials, thus have
Different coefficient of frictions.
A kind of optimal technical scheme according to the present invention, is obtained based on the stress state analysis to sectional material blank in mold
Sectional material blank easy fracture region and non section steel blank easy fracture region on profile.
The invention also provides a kind of for manufacturing the mold of stretch bending profile, which has and the type for constituting profile
The contact of material blank, configuration corresponding to desired profile profile, profile have sectional material blank easy fracture region and non-
Sectional material blank easy fracture region, wherein the frictional force in sectional material blank easy fracture region between sectional material blank and mold is larger,
Wherein, on mold sectional material blank easy fracture region and non section steel blank easy fracture region implement different reduction frictional force
Measure, so that sectional material blank is close with frictional force of the mold at sectional material blank easy fracture region and non section steel blank easy fracture region
Patibhaga-nimitta is same.
Rolling friction measure, example is arranged in sectional material blank easy fracture region in a kind of optimal technical scheme according to the present invention
Such as the first cylindrical roller.Lubricating oil can extraly be applied on the first cylindrical roller.
A kind of optimal technical scheme according to the present invention applies sliding friction measure in non section steel blank easy fracture region,
Such as apply lubricating oil.
A kind of optimal technical scheme according to the present invention can also apply rolling friction in non section steel blank easy fracture region
Measure, such as the second cylindrical roller, wherein the coefficient of friction of the rolling friction measure, which is greater than, is applied to the easily broken split plot of sectional material blank
The friction system of rolling friction measure in domain.For example, the two can be to have cylindrical roller made of different materials, thus have
Different coefficient of frictions.
Through the invention, it overcomes sectional material blank during traditional stretch bending and locally extends non-uniform problem,
Avoid that whole stretch bending is not in place, occurs being broken or springing back serious defect.
Detailed description of the invention
Advantageous embodiment according to the present invention is shown in the attached drawings.In the accompanying drawings:
Fig. 1 shows according to the present invention for manufacturing the flow chart of the manufacturing method of the mold of stretch bending profile；
Fig. 2 shows according to the present invention for manufacturing the schematic diagram of the mold of stretch bending profile；
Fig. 3 shows the signal of the measure for the reduction frictional force implemented according to the present invention in sectional material blank easy fracture region
Figure；And
Fig. 4 shows the schematic diagram of the mold manufacture stretch bending profile using according to the present invention for manufacturing stretch bending profile.
Specific embodiment
Next, with reference to attached drawing be described in detail it is according to the present invention for manufacture stretch bending profile mold manufacturing method and
For manufacturing the specific embodiment of the mold of stretch bending profile.Forth below is only preferred implementation side according to the present invention
Formula, those skilled in the art can expect can be realized other modes of the invention on the basis of the preferred embodiment,
The other modes are equally fallen within the scope of the present invention.
Referring to Fig. 1, in the manufacturing method of the mold according to the present invention for manufacturing stretch bending profile, first according to expectation
The configuration of obtained profile determines the configuration for constituting the stretch bending process of the sectional material blank of profile and for constituting profile
Secondly the profile of mold contacted with sectional material blank obtains taking turns according to the stretch bending process of sectional material blank and the edge analysis of mold
Sectional material blank easy fracture region and non section steel blank easy fracture region on exterior feature, wherein the profile in sectional material blank easy fracture region
Frictional force between blank and mold is larger.Finally, on mold sectional material blank easy fracture region and non section steel blank it is easily broken
The measure of different reduction frictional force is implemented in split plot domain, so that sectional material blank and mold are in sectional material blank easy fracture region and nand-type
Frictional force at material blank easy fracture region is approximately uniform.
Particularly, what is applied for sectional material blank easy fracture region is rolling friction measure, such as cylindrical roller, and is nand-type
Material blank easy fracture region applies sliding friction measure, such as lubricating oil.Rolling friction in sectional material blank easy fracture region is arranged
Lubricating oil can also additionally be applied by applying.It is also feasible that also applying for example, cylinder on non section steel blank easy fracture region
Roller rolls rub measure, but the coefficient of friction of the rolling friction measure be greater than be applied to sectional material blank easy fracture region application
The coefficient of friction of rolling friction measure.
Particularly, can defect and/or stress state based on the different parts of sectional material blank during stretch bending come
Analysis obtains sectional material blank easy fracture region and non section steel blank easy fracture region on profile.
The frictional force design for having carried out differentiation for the different parts of mold as a result, is changed on demand local friction system
Number reduces the difference of different parts frictional force during stretch bending, promotes each parts uniformity of profile to extend, integrally reaches and most preferably answer
Power state, the defects of reducing fracture and spring back.
Fig. 2 shows the roots obtained based on the manufacturing method above according to the mold for manufacturing stretch bending profile of the invention
According to the schematic diagram of the mold 1 for manufacturing stretch bending profile of the invention.Wherein, mold 1 has and the profile for constituting profile
Profile that blank 2 contacts, configuration corresponding to desired profile, profile have sectional material blank easy fracture region 10 and non-
Sectional material blank easy fracture region 11, wherein the frictional force in sectional material blank easy fracture region 10 between sectional material blank 2 and mold 1
It is larger, and friction is small between 11 sectional material blank 2 of non section steel blank easy fracture region and mold 1.According to the present invention, exist
The measure of different reduction frictional force is implemented in sectional material blank easy fracture region 10 and non section steel blank easy fracture region 11, so that type
The phase approximate with frictional force of the mold 1 at sectional material blank easy fracture region 10 and non section steel blank easy fracture region 11 of material blank 2
Together.
Referring to Fig. 3, can for example rub in the measure for the reduction frictional force that 10 region of sectional material blank easy fracture is implemented to roll
Wiping measure, especially the first cylindrical roller 101, thus reduce the friction between sectional material blank 2 and mold 1.Extraly, may be used also
To apply lubricating oil on the first cylindrical roller 101, to further decrease friction.
Sliding friction measure can be applied in non section steel blank easy fracture region 11, such as apply lubricating oil.Also feasible
It is also to apply rolling friction measure, such as the second cylindrical roller in non section steel blank easy fracture region 11, but the rolling friction
The coefficient of friction of measure is greater than the coefficient of friction for being applied to the rolling friction measure of the application of sectional material blank easy fracture region 10.
Fig. 4 shows the schematic diagram of the mold manufacture stretch bending profile using according to the present invention for manufacturing stretch bending profile,
Wherein the both ends of sectional material blank 2 are fixed and by opposite direction stretch, and then contact with mold 1, especially the wheel with mold 1
Wide sectional material blank easy fracture region 10 and non section steel blank easy fracture region 11 is contacted with deformation occurs, to obtain desired
Configuration.
In view of herein combine preferred embodiment the present invention has been demonstrated and has been described, it is therefore apparent that meeting
Modification, replacement can be carried out in broad range expected from the claims in the present invention and are added.
Claims (13)
1. it is a kind of for manufacturing the manufacturing method of the mold of stretch bending profile, it is determined and is used according to the configuration of the desired profile
In the stretch bending process and configuration for constituting the profile for the sectional material blank for constituting the profile mold with the type
The profile of material blank contact, obtains according to the edge analysis of the stretch bending process of the sectional material blank and the mold in the profile
On sectional material blank easy fracture region and non section steel blank easy fracture region, wherein the institute in sectional material blank easy fracture region
The frictional force stated between sectional material blank and the mold is larger, which is characterized in that easy for the sectional material blank on the mold
The measure of different reduction frictional force is implemented in the region of fracture and the non section steel blank easy fracture region, so that the sectional material blank
Phase approximate with frictional force of the mold at sectional material blank easy fracture region and the non section steel blank easy fracture region
Together.
2. manufacturing method described in accordance with the claim 1, which is characterized in that apply rolling in sectional material blank easy fracture region
Dynamic friction measure.
3. manufacturing method according to claim 2, which is characterized in that the rolling friction measure is the first cylindrical roller.
4. manufacturing method described in accordance with the claim 3, which is characterized in that apply lubricating oil on first cylindrical roller.
5. according to manufacturing method described in any one of preceding claims 1 to 4, which is characterized in that in the non section steel blank
Easy fracture region applies sliding friction measure.
6. manufacturing method according to claim 5, which is characterized in that apply in the non section steel blank easy fracture region and moisten
Lubricating oil.
7. according to manufacturing method described in preceding claims 2 or 3, which is characterized in that in the easily broken split plot of non section steel blank
Domain applies the second cylindrical roller, wherein the coefficient of friction of second cylindrical roller is greater than the first cylindrical roller.
8. according to manufacturing method described in any one of preceding claims 1 to 4, which is characterized in that based on to the profile base
The stress state analysis of material obtains sectional material blank easy fracture region and non section steel blank easy fracture region on the profile.
9. a kind of for manufacturing the mold of stretch bending profile, which has contacts with the sectional material blank for constituting the profile
, the profile of configuration corresponding to the desired profile, the profile has sectional material blank easy fracture region and nand-type
Material blank easy fracture region, wherein the rubbing between sectional material blank and the mold described in sectional material blank easy fracture region
It is larger to wipe power, which is characterized in that on the mold sectional material blank easy fracture region and the non section steel blank it is easily broken
The measure of different reduction frictional force is implemented in split plot domain, so that the sectional material blank is easily broken in the sectional material blank with the mold
Frictional force at split plot domain and the non section steel blank easy fracture region is approximately uniform.
10. mold according to claim 9, which is characterized in that the first circle of setting in sectional material blank easy fracture region
Column roller.
11. mold according to claim 10, which is characterized in that apply lubricating oil on first cylindrical roller.
12. according to mold described in any one of preceding claims 9 to 11, which is characterized in that easy in the non section steel blank
The region of fracture applies lubricating oil.
13. according to mold described in any one of preceding claims 9 to 11, which is characterized in that easy in the non section steel blank
The second cylindrical roller is arranged in the region of fracture, wherein the coefficient of friction of second cylindrical roller is greater than the first cylindrical roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162280.4A CN110193556B (en) | 2018-02-27 | 2018-02-27 | Die for manufacturing stretch-bending section bar and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162280.4A CN110193556B (en) | 2018-02-27 | 2018-02-27 | Die for manufacturing stretch-bending section bar and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110193556A true CN110193556A (en) | 2019-09-03 |
| CN110193556B CN110193556B (en) | 2021-01-26 |
Family
ID=67750859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810162280.4A Active CN110193556B (en) | 2018-02-27 | 2018-02-27 | Die for manufacturing stretch-bending section bar and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN110193556B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054432A (en) * | 1979-07-25 | 1981-02-18 | Rockwell International Corp | Method of superplastic forming using release coatings with different coefficients of friction |
| CN1265133A (en) * | 1997-07-22 | 2000-08-30 | 通用汽车公司 | Lubrication system for hot forming |
| US20040129052A1 (en) * | 2003-01-06 | 2004-07-08 | Krajewski Paul Edward | Method of reducing cycle time for metal forming |
| CN102151728A (en) * | 2011-05-09 | 2011-08-17 | 江苏同力机械有限公司 | Cold bending forming process for camber beam of car body of passenger car |
| JP4850570B2 (en) * | 2006-04-14 | 2012-01-11 | 新日本製鐵株式会社 | Butt weld metal plate |
| CN102366770A (en) * | 2011-10-10 | 2012-03-07 | 上海交通大学 | Design method of stretch bending loading trace of novel stretch bender |
| CN106944545A (en) * | 2017-03-25 | 2017-07-14 | 亿森（上海）模具有限公司 | Moulding face different coefficients of friction and controllable forming method |
| CN107073860A (en) * | 2014-08-28 | 2017-08-18 | 戴维·布罗德赫德 | Punch die or drift for diel |
-
2018
- 2018-02-27 CN CN201810162280.4A patent/CN110193556B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054432A (en) * | 1979-07-25 | 1981-02-18 | Rockwell International Corp | Method of superplastic forming using release coatings with different coefficients of friction |
| CN1265133A (en) * | 1997-07-22 | 2000-08-30 | 通用汽车公司 | Lubrication system for hot forming |
| US20040129052A1 (en) * | 2003-01-06 | 2004-07-08 | Krajewski Paul Edward | Method of reducing cycle time for metal forming |
| JP4850570B2 (en) * | 2006-04-14 | 2012-01-11 | 新日本製鐵株式会社 | Butt weld metal plate |
| CN102151728A (en) * | 2011-05-09 | 2011-08-17 | 江苏同力机械有限公司 | Cold bending forming process for camber beam of car body of passenger car |
| CN102366770A (en) * | 2011-10-10 | 2012-03-07 | 上海交通大学 | Design method of stretch bending loading trace of novel stretch bender |
| CN107073860A (en) * | 2014-08-28 | 2017-08-18 | 戴维·布罗德赫德 | Punch die or drift for diel |
| CN106944545A (en) * | 2017-03-25 | 2017-07-14 | 亿森（上海）模具有限公司 | Moulding face different coefficients of friction and controllable forming method |
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| Publication number | Publication date |
|---|---|
| CN110193556B (en) | 2021-01-26 |
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