CN108500132A - A kind of design method of the progressive flanging forming tool heads of tablet - Google Patents
A kind of design method of the progressive flanging forming tool heads of tablet Download PDFInfo
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- CN108500132A CN108500132A CN201810209985.7A CN201810209985A CN108500132A CN 108500132 A CN108500132 A CN 108500132A CN 201810209985 A CN201810209985 A CN 201810209985A CN 108500132 A CN108500132 A CN 108500132A
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- cone
- frustum
- diameter
- height
- tablet
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Medicinal Preparation (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
A kind of design method of the progressive flanging forming tool heads of tablet, first design carry the forming tool head of circular cone structure form, and forming tool head is revolving body, and the lower end of revolving body is knife bar, as clamp area；It is the frustum of a cone above knife bar, as bending deformation area；It is cylinder above the frustum of a cone, as flanging forming area；Then it determines the diameter of knife bar, then determines the relative dimensions of the frustum of a cone, finally determine the height and diameter of cylinder；Forming tool head of the present invention can be directed to the tablet of round or ellipse pre-drilled cavity, complete the progressive flanging forming of single pass or the progressive flanging forming of multi-pass.
Description
Technical field
The invention belongs to the design sides of sheet forming technical field more particularly to a kind of progressive flanging forming tool heads of tablet
Method.
Background technology
Progressive molding technique is the initiative technique developed in the more than ten years in past and studied comprehensively, they can be non-big
Traditional Sheet Metal Forming Technology is substituted under the conditions of large-scale production.The advantages of in addition to as stepless increment and flexible manufacturing technique, experiment is ground
Study carefully discovery, the formability of progressive molding technique is typically larger than conventional stretch forming, deep draw and Sheet Metal Forming Technology.Use progressive molding
Technology is formed with the flange part of pre-manufactured hole, has flexibility, when low consumption, the features such as low cost, formability is high.
Currently, in the research of progressive flanging forming, the head structure used is broadly divided into two types.One is ends
Portion is hemispheric spherical tool heads, and the diameter of tool heads is often below 15mm.It is another then be the bar shaped work with the frustum of a cone
Have head, reversed progressive flanging forming can be completed using the tool heads.
For the above-mentioned conical tool heads that can realize backward flanging forming, the size of flange height and tool heads
Between there is corresponding geometrical relationships.During progressive flanging forming, the structure size of tool heads directly affects work
The load passage and forming effect of skill.However, in existing research, does not have also for the structure size of tool heads and explicitly set
Meter method.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of progressive flanging forming works of tablet
Have a design method of head, the forming tool head of design can complete the progressive flanging forming of single pass or the progressive flange of multi-pass at
Shape.
In order to achieve the above object, this invention takes the following technical solutions：
A kind of design method of the progressive flanging forming tool heads of tablet, includes the following steps：
The first step：Forming tool head of the design with circular cone structure form, forming tool head is revolving body, revolving body
Lower end is the knife bar 1 of a diameter of d, as clamp area；The top of knife bar 1 is a diameter of D in lower surface1, a diameter of D in upper surface2, high
Degree is h1, cone angle is the frustum of a cone 2 of θ, as bending deformation area；2 top of the frustum of a cone is diameter D2, height h2Cylinder 3, make
For flanging forming area；It is equipped with round-corner transition between the taper surface of the frustum of a cone 2 and lower surface and cylinder 3；
Second step：Determine the diameter d of knife bar 1, the value range of diameter d is 10~20mm；
Third walks：Determine the relative dimensions of the frustum of a cone 2：The lower surface diameter D of the frustum of a cone 21Bigger by 5 than the diameter d of knife bar 1~
8mm；Angle folded by the inclined-plane of the frustum of a cone 2 and the axis of revolving body is θ, and the value range of θ is at 20 °~30 °；The frustum of a cone 2
Height h1With thickness t, pre-drilled cavity size, the flange branch bore d of tablet 4m, flange branch pipe outside diameter dtIt is related with flange height H,
During 4 progressive flanging forming of tablet, the limitative flanging height of single pass progressive molding is Hmax；
A, as flange height H≤Hmax, then the progressive flanging forming of single pass is used；In forming process, tablet 4 occurs curved
The maximum length of song deformation is l=h1min×tanθ；
When the desire trepanning of tablet 4 is diameter d0It is round when being intended to trepanning, the tablet volume to deform before flange isThe tablet volume to deform after flange isAccording to constancy of volume
Principle, volume is equal before and after flange, i.e. V0=V1, then the height h of the frustum of a cone 2 is determined by following formula1Minimum value h1min：Therefore, the height h of the design tool head frustum of a cone 21It should be greater than calculating
Minimum value, i.e. h1≥h1min；
When the desire trepanning of tablet 4 is major axis dimension a, and the ellipse of minor axis dimension b is intended to trepanning, deform before flange
Tablet volume isThe tablet volume to deform after flange isRoot
According to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then the height h of the frustum of a cone 2 is determined by following formula1Minimum value
h1min：Therefore, the height h of the design tool head frustum of a cone 21It should be greater than calculating most
Small value, i.e. h1≥h1min；
B, as flange height H ＞ Hmax, then the progressive flanging forming of multi-pass is used；In the mistake of the progressive flanging forming of multi-pass
Cheng Zhong each needs traverse feed a distance Δ l, maximum transversal amount of feeding Δ l to determine as needed between forming passage, and
The value condition of lateral feed Δ l is t≤Δ l≤h1Thus × tan θ obtain the height h of the tool heads frustum of a cone 21Minimum value
ForTherefore, during multi-pass tablet progressive flanging forming, the height h of the design tool head frustum of a cone 21It answers
More than the minimum value of calculating, i.e.,
By the lower surface diameter D of the frustum of a cone 21, taper angle theta and height h1Value determine upper surface diameter D2, upper surface diameter D2
Value be D2=D1+2h1×tanθ；
4th step：Determine the height h of cylinder 32With diameter D2；The height h of cylinder 32Value range be 10~
30mm；The diameter D of cylinder 32With the upper surface diameter D of the frustum of a cone 22It is in the same size, i.e. the diameter D of cylinder 32Value be
D2=D1+2h1×tanθ。
The invention has the advantages that proposing a kind of simple, easy tablet progressive flanging forming tool heads design side
Method；The head structure of this method design is simple, easy to produce and process；This method specifies the geometry of each area size of tool heads
Relationship and value range are conducive to shorten design time, have the advantages that time-saving and efficiency；This method be suitable for round pre-drilled cavity and
The progressive flanging forming of oval pre-drilled cavity tablet and single pass and multi-pass, has a wide range of application.
Description of the drawings
Fig. 1 is the head structure schematic diagram that the present invention carries circular cone structure form.
Fig. 2 is the round desire progressive flanging forming schematic diagram of plate with opening single pass.
Fig. 3 is that ellipse is intended to the progressive flanging forming schematic diagram of plate with opening single pass.
Fig. 4 is the progressive flanging forming process schematic of tablet multi-pass.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and examples.
A kind of design method of the progressive flanging forming tool heads of tablet, includes the following steps：
The first step：Referring to Fig.1, forming tool head of the design with circular cone structure form, forming tool head is revolving body,
The lower end of revolving body is the knife bar 1 of a diameter of d, and heavy caliber thick wall cylinder is mounted on gradually for being connected with handle of a knife as clamp area
Into on flexible hemmer；The top of knife bar 1 is a diameter of D in lower surface1, a diameter of D in upper surface2, it is highly h1, cone angle is θ's
The frustum of a cone 2, as bending deformation area, for making tablet 4 occur bending and deformation；2 top of the frustum of a cone is diameter D2, height h2Circle
Cylinder 3, as flanging forming area, for the plank to occur bending and deformation to be completed flanging forming；The taper surface of the frustum of a cone 2 is under
It is equipped with round-corner transition between surface and cylinder 3；
Second step：Referring to Fig.1, the diameter d of knife bar 1 is determined：To ensure that it is certain rigid that tool heads possess in forming process
Degree, the diameter d of knife bar 1 cannot be too small, and the value range of diameter d is 10~20mm；
Third walks：Referring to Fig.1, the relative dimensions of the frustum of a cone 2 are determined：The lower surface diameter D of the frustum of a cone 21It is more straight than knife bar 1
Big 5~the 8mm of diameter d；Angle folded by the inclined-plane of the frustum of a cone 2 and the axis of revolving body is θ, and the value range of θ is at 20 °~30 °；Circle
The height h of frustum 21With thickness t, pre-drilled cavity size, the flange branch bore d of tablet 4m, flange branch pipe outside diameter dtAnd flange height
H is related, and during tablet progressive flanging forming, the limitative flanging height of single pass progressive molding is Hmax；
A, with reference to Fig. 2, as flange height H≤Hmax, then the progressive flanging forming of single pass is used；In forming process, tablet
4 maximum lengths to occur bending and deformation are l=h1min×tanθ；
With reference to Fig. 2, when the desire trepanning of tablet 4 is diameter d0Round tablet shade when being intended to trepanning, to deform before flange
Partial volume isThe tablet dash area volume to deform after flange is
According to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then the height h of the frustum of a cone 2 is determined by following formula1Minimum value
h1min：Therefore, the height h of the design tool head frustum of a cone 21It should be greater than
The minimum value of calculating, i.e. h1≥h1min；
With reference to Fig. 3, when the desire trepanning of tablet 4 is major axis dimension a, and the ellipse of minor axis dimension b is intended to trepanning, sent out before flange
The tablet dash area volume for the shape that changes isThe tablet shadow part to deform after flange is seperated
Product isAccording to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then true by following formula
Determine the height h of the frustum of a cone 21Minimum value h1min：Therefore, design tool head circular cone
The height h of platform 21It should be greater than the minimum value calculated, i.e. h1≥h1min；
B, with reference to Fig. 4, as flange height H ＞ Hmax, then the progressive flanging forming of multi-pass is used；In the progressive flange of multi-pass
During forming, traverse feed a distance Δ l is needed between each forming passage, maximum transversal amount of feeding Δ l is according to need
It determines, and the value condition of lateral feed Δ l is t≤Δ l≤h1Thus × tan θ obtain the height h of the tool heads frustum of a cone 21
Minimum value beTherefore, during multi-pass tablet progressive flanging forming, the design tool head frustum of a cone 2
Height h1The minimum value calculated is should be greater than, i.e.,
By the lower surface diameter D of the frustum of a cone 21, taper angle theta and height h1Value determine upper surface diameter D2, upper surface diameter D2
Value be D2=D1+2h1×tanθ；
4th step：Referring to Fig.1, the height h of cylinder 3 is determined2With diameter D2；The height h of cylinder 32Value range be
10~30mm；The diameter D of cylinder 32With the upper surface diameter D of the frustum of a cone 22It is in the same size, i.e. the diameter D of cylinder 32Take
Value is D2=D1+2h1×tanθ。
Claims (1)
1. a kind of design method of the progressive flanging forming tool heads of tablet, which is characterized in that include the following steps：
The first step：Forming tool head of the design with circular cone structure form, forming tool head is revolving body, the lower end of revolving body
It is the knife bar (1) of a diameter of d, as clamp area；It is a diameter of D in lower surface above knife bar (1)1, a diameter of D in upper surface2, high
Degree is h1, cone angle is the frustum of a cone (2) of θ, as bending deformation area；It is diameter D above the frustum of a cone (2)2, height h2Cylinder
(3), as flanging forming area；It is equipped with round-corner transition between the taper surface of the frustum of a cone (2) and lower surface and cylinder (3)；
Second step：Determine the diameter d of knife bar (1), the value range of diameter d is 10~20mm；
Third walks：Determine the relative dimensions of the frustum of a cone (2)：The lower surface diameter D of the frustum of a cone (2)1Diameter d than knife bar (1) is big by 5
~8mm；Angle folded by the inclined-plane of the frustum of a cone (2) and the axis of revolving body is θ, and the value range of θ is at 20 °~30 °；The frustum of a cone
(2) height h1With thickness t, pre-drilled cavity size, the flange branch bore d of tablet (4)m, flange branch pipe outside diameter dtAnd flange height
H is related；During tablet progressive flanging forming, the limitative flanging height of single pass progressive molding is Hmax；
A, as flange height H≤Hmax, then the progressive flanging forming of single pass is used；In forming process, tablet (4) bends
The maximum length of deformation is l=h1min×tanθ；
When the desire trepanning of tablet (4) is diameter d0It is round when being intended to trepanning, the tablet volume to deform before flange isThe tablet volume to deform after flange isAccording to constancy of volume original
It manages, volume is equal before and after flange, i.e. V0=V1, then the height h of the frustum of a cone (2) is determined by following formula1Minimum value h1min：Therefore, the height h of the design tool head frustum of a cone (2)1It should be greater than counting
The minimum value of calculation, i.e. h1≥h1min；
When the desire trepanning of tablet (4) is major axis dimension a, and the ellipse of minor axis dimension b is intended to trepanning, what is deformed before flange is flat
Plate bulk isThe tablet volume to deform after flange isAccording to
Constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then the height h of the frustum of a cone (2) is determined by following formula1Minimum value
h1min：Therefore, the height h of the design tool head frustum of a cone (2)1It should be greater than calculating
Minimum value, i.e. h1≥h1min；
B, as flange height H ＞ Hmax, then the progressive flanging forming of multi-pass is used；During multi-pass progressive flanging forming,
Traverse feed a distance Δ l, maximum transversal amount of feeding Δ l is needed to determine as needed between each forming passage, and laterally
The value condition of amount of feeding Δ l is t≤Δ l≤h1Thus × tan θ obtain the height h of the tool heads frustum of a cone (2)1Minimum value beTherefore, during multi-pass tablet progressive flanging forming, the height h of the design tool head frustum of a cone (2)1It answers
More than the minimum value of calculating, i.e.,
By the lower surface diameter D of the frustum of a cone (2)1, taper angle theta and height h1Value determine upper surface diameter D2, upper surface diameter D2's
Value is D2=D1+2h1×tanθ；
4th step：Determine the height h of cylinder (3)2With diameter D2；The height h of cylinder (3)2Value range be 10~
30mm；The diameter D of cylinder (3)2With the upper surface diameter D of the frustum of a cone (2)2It is in the same size, i.e. the diameter D of cylinder (3)2's
Value is D2=D1+2h1×tanθ。
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|---|---|---|---|
| CN201810209985.7A CN108500132B (en) | 2018-03-14 | 2018-03-14 | Manufacturing method of flat plate progressive flanging forming tool head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810209985.7A CN108500132B (en) | 2018-03-14 | 2018-03-14 | Manufacturing method of flat plate progressive flanging forming tool head |
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| CN108500132A true CN108500132A (en) | 2018-09-07 |
| CN108500132B CN108500132B (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496077A (en) * | 2020-04-27 | 2020-08-07 | 东南大学 | Square hole flanging forming method |
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|---|---|---|---|---|
| US3693568A (en) * | 1971-03-29 | 1972-09-26 | Francis G Mckee | Method of forming heat exchanger fin collars |
| CN103521607A (en) * | 2013-10-15 | 2014-01-22 | 重庆大学 | Numerical-control progressive tube wall hole flanging and forming tool head and method |
| CN104259308A (en) * | 2014-09-24 | 2015-01-07 | 重庆大学 | Tool head and method for pipe end mould-free numerical control incremental turn-up forming |
| CN104368662A (en) * | 2014-11-14 | 2015-02-25 | 重庆大学 | Tool head and method for controlling buckling deformation in thin plate die-free gradual edge turning process |
| CN104816166A (en) * | 2015-04-10 | 2015-08-05 | 上海交通大学 | Pore opening and pore broadening integrated incremental forming hole flanging tool and hole flanging process |
| CN204564869U (en) * | 2015-05-07 | 2015-08-19 | 四川太湖锅炉有限公司 | A kind of hemmer of large-diameter circular thin plate |
-
2018
- 2018-03-14 CN CN201810209985.7A patent/CN108500132B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3693568A (en) * | 1971-03-29 | 1972-09-26 | Francis G Mckee | Method of forming heat exchanger fin collars |
| CN103521607A (en) * | 2013-10-15 | 2014-01-22 | 重庆大学 | Numerical-control progressive tube wall hole flanging and forming tool head and method |
| CN104259308A (en) * | 2014-09-24 | 2015-01-07 | 重庆大学 | Tool head and method for pipe end mould-free numerical control incremental turn-up forming |
| CN104368662A (en) * | 2014-11-14 | 2015-02-25 | 重庆大学 | Tool head and method for controlling buckling deformation in thin plate die-free gradual edge turning process |
| CN104816166A (en) * | 2015-04-10 | 2015-08-05 | 上海交通大学 | Pore opening and pore broadening integrated incremental forming hole flanging tool and hole flanging process |
| CN204564869U (en) * | 2015-05-07 | 2015-08-19 | 四川太湖锅炉有限公司 | A kind of hemmer of large-diameter circular thin plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496077A (en) * | 2020-04-27 | 2020-08-07 | 东南大学 | Square hole flanging forming method |
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