CN106583533A - Inclined blade male die and method used in stretch-wrap bending on-line punching process - Google Patents
Inclined blade male die and method used in stretch-wrap bending on-line punching process Download PDFInfo
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- CN106583533A CN106583533A CN201611142809.3A CN201611142809A CN106583533A CN 106583533 A CN106583533 A CN 106583533A CN 201611142809 A CN201611142809 A CN 201611142809A CN 106583533 A CN106583533 A CN 106583533A
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- Prior art keywords
- punch
- bevelled
- punching
- die
- online
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- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
-
- 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
- B21D37/20—Making tools by operations not covered by a single other subclass
- B21D37/205—Making cutting tools
Abstract
The invention discloses an inclined blade male die and method used in the stretch-wrap bending on-line punching process. The inclined blade male die and die cutting edge sizes are calculated; the length of the inclined blade male die needs to be determined according to the specific structure and the height of a beveled cutting edge; in order to guarantee that the inclined blade male die and a female die of a die do not rotate during punching, a male die limiting face and a female die limiting face should be designed; when the inclined blade male die is installed, a cutting point should be placed on the side with higher part appearance quality requirement; due to existence of a tip blade of the inclined blade male die, in order to avoid stress concentration, a small plane is designed at the point position. According to the on-line punching method, the blanking force is effectively reduced, the requirement for other assisting devices for on-line punching is reduced, and important meanings on the light design of equipment are achieved. By means of the on-line punching method, the material stress state can be improved by changing the tip blade position, so that the shaping quality and the production stability of parts are improved, the defect of sinking of surfaces nearby punched holes is avoided, and the appearance quality of the product is improved.
Description
Technical field
The present invention relates to section bar class part multi-position furnace technical field, more particularly to a kind of online punching of stretch wrap forming
Bevelled punch and method used in journey.
Background technology
Complete automobile door frame mainly includes glass run, front window frame, doorframe upper strip, four part of rear window frame.Automobile door frame
As door assembly, it is directly connected to whether opening/closing door of vehicle smooth, whether smooth attractive in appearance, the doorframe sealing of car load curve whether may be used
It is whether flexible etc. by the lifting of, glass, so enough dimensional accuracies and appearance requirement will be ensured.
Doorframe upper strip part part is formed with following characteristics：The characteristics of overall variable curvature with three-dimensional, muscle portion has some
Hole position is used to install sealing strip, and appearance has higher surface quality requirements.On automobile door frame, the shaping of bar is from initial bar shaped
Blank Jing roll bendings, cut off operation, complete the processing of automobile door frame section bar；Then section bar is again through works such as stretch bending, punching, cut-outs
Skill, eventually becomes a complete upper bar part.To improve efficiency, doorframe upper strip part is using direct-on-line punching after stretch wrap forming
The technology in hole, i.e., first carry out three-dimensional bending to vertical profile, passes through the online punching on stretch benders in the case where keeping not unloading
Module completes punching on line.However, (unloading down from stretch benders after stretch bending, beating on punching machine special compared to punching under line
Hole), on line, punch process meeting tension bends through the impact of journey, and during punching, material stress is complicated.
At present online punch used by punching still adopts traditional flat sword punch, during punching hole neighboring area it is impacted compared with
Greatly, significant depressions are produced, causes then appearance face reflection light uneven, produce depression.Traditional punch form is applied to line
The unstable problem of doorframe quality that upper punching is brought is the problem that whole industry is all present, the very high doorframe of some prescriptions
Have to using punch pattern under line avoid problems, it is cumbersome and time consuming.
The content of the invention
It is an object of the invention to it is unstable to overcome traditional punch form to be applied to doorframe quality that punching on line brought
A kind of shortcoming and defect of problem, there is provided the inclined edge used in process is simple, the online punch process of time saving and energy saving stretch wrap forming
Punch and method., still using traditional flat sword punch, during punching, hole neighboring area is received to overcome online punch used by punching at present
Affect larger, depression obvious, cause then appearance face reflection light uneven, produce the technical problems such as depression.
The present invention is achieved through the following technical solutions：
A kind of bevelled punch 11 used in the online punch process of stretch wrap forming, the cutting edge of bevelled punch 11 is inclined edge,
There is the plane that a width is 0.3～0.5mm at the blade tip of inclined edge.Depending on the angle of inclined edge can also be according to concrete punching process,
It is such as using 10 ° to 35 °, general desirable 30 or so °.
The body side of the bevelled punch 11, with a spacing plane 16.
The inclined edge of the bevelled punch 11 is highly less than or equal to the sheet thickness for treating punching position.
A kind of online hole-punching method of stretch wrap forming, comprises the steps：
Step one：The diameter of 11 cutting edge of bevelled punch is calculated first, then on the basis of bevelled punch 11, determines die 9
Blade dimensions, computing formula is as follows：
In formula：
dp, ddRespectively punching bevelled punch 11,9 nominal diameter of die (mm)；
D is the nominal diameter (mm) for treating punching part；
Δ is the design tolerance (mm) for treating punching hole diameter；
ZminFor bevelled punch 11,9 minimum double-faced clearance (mm) of die；
δp, δdRespectively bevelled punch 11,9 manufacturing tolerance of die (mm)；
X is the coefficient of waste, x=0.5～1.0；
Step 2：With reference to reference to formula (3), the height of the length and punch cutting edge basil 15 of bevelled punch 11 is determined：
L=H1+H2+H3+h+t+Y (3)
In formula：
L is 11 length of bevelled punch；
H1For 13 thickness of punch retainer；
H29 depth of die is entered for bevelled punch 11；
H3Binder plate thickness；
H is the inclined edge cutting edge height of bevelled punch 11, generally should be smaller than or equal to t；
T is punch area material thickness；
Y is the safe distance between punch retainer 13 and briquetting 10；
As the planform for treating punching part does not have the symmetry for treating punch center, therefore, bevelled punch 11
Blade tip should be placed on appearance requirement higher side during installation.
To make bevelled punch 11 in blanking process, die 9 not rotate, should be provided with the side of 11 body of bevelled punch
The spacing plane of the spacing plane 16 and corresponding die 9 of bevelled punch 11.
In blanking process, the punch cutting edge basil 15 of bevelled punch 11 is due to the presence of sharp sword, easy at blade tip during punching
Stress concentration is produced, serious wear is caused, to avoid this type of circumstances from happening, a width of 0.5mm is designed before punching at blade tip left
Right facet 22.The advantage of oblique edge blanking can so be retained, slow down stress concentration again.
In blanking process, it is the crudy for ensureing online punching after stretch bending, the stretch wrap forming of previous operation should be protected
Pattern of syndrome material patch mould is tight, therefore the power size of extending of stretch wrap forming should be enough to make material that plastic deformation to occur, but is unlikely to
The big yield strength that so as to cause section to be distorted, generally 1.0～1.1 times of power of extending value and the product of area of section.
In blanking process, the cutting edge of 11 cutting edge basil of bevelled punch is highly thick less than or equal to the material for treating punching position.
The present invention is had the following advantages and effect relative to prior art：
Blanking pressure is effectively reduced, the requirement to online other auxiliary device of punching is reduced, to online hole punched device
Light-weight design has important meaning；
Compared to flat sword punching process, during oblique edge blanking, cutting edge is come into contact with material, can be by changing sharp sword
Position rush point (that is, that point being punched occurring at first) to have changed, finally improve material stress, improve automobile door frame
The forming quality of upper bar and the stability of production, it is to avoid surface indentation defect, improving product presentation quality.
Description of the drawings
Fig. 1 integrally illustrates schematic diagram for embodiment of the present invention car front door doorframe upper strip part；
Fig. 2 is embodiment of the present invention arrangements for automotive doors doorframe upper strip cross-sectional view；
Fig. 3 is the online punching module 2D assembling schematic diagram of the embodiment of the present invention；
Fig. 4 is Fig. 3 close-up schematic views；
Fig. 5 is bevelled punch structure 2D schematic diagram of the present invention；
Fig. 6 is bevelled punch scheme of installation of the present invention；
Fig. 7 is the bevelled punch structure 2D schematic diagram after present invention optimization.
Shown in figure it is：Circular port 1,2；2D appearances 3；Muscle portion 4；Fixed seat 5；Main body telescoping cylinder 6；Returning face plate 7；Upset
Telescoping cylinder 8；Die 9；Briquetting 10；Bevelled punch 11；Punch base 12；Punch retainer 13；Stretch bending mould main body 14；Punch cutting edge
Basil 15；Spacing plane 16；The symmetric position of punching neighboring area four 17,18,19,20；3D appearances 21；Plane 22.
Specific embodiment
The present invention is more specifically described in detail with reference to such as Fig. 1 to 7 and specific embodiment.
Embodiment
Fig. 1 show bar schematic diagram on embodiment automobile door frame of the present invention, and Fig. 2 is its sectional view.Bar part on this
Muscle portion 4 have two for install circular port 1,2, using online punch pattern.Additionally, 2D appearances 3 have higher surface
Prescription.
Fig. 3,4 show existing punching module 2D assembling schematic diagram.
Fig. 5 show the bevelled punch 11 in the online oblique edge blanking adopted by this example, i.e., monolateral bevelled punch；This is oblique
The design of sword punch 11 is as follows with installation requirement：
(1) 11 cutting edge diameter of bevelled punch is calculated first, then 9 cutting edge chi of die is determined on the basis of bevelled punch 11
Very little, cutting edge is calculated and is carried out by following formula：
Wherein：dp, ddRespectively punching bevelled punch 11,9 nominal diameter of die (mm)；D is the nominal diameter for treating punching
(mm)；Δ is the design tolerance (mm) for treating punching hole diameter；ZminFor bevelled punch 11,9 minimum double-faced clearance (mm) of die；δp, δd
Respectively bevelled punch 11,9 manufacturing tolerance of die (mm)；X is the coefficient of waste, x=0.5～1.0.
The diameter d of example mesopore requires Φ 5+0.10mm, bevelled punch 11,9 manufacturing tolerance grade of die be respectively IT6 and
IT7, x take 0.75, δp=0.009mm；δd=0.015mm, minimum two-sided reasonable clearance Zmin=0.144.
It is final to determine 11 Blade dimensions 5.0750-0.009mm of bevelled punch.
(2) section bar treats that punch area is three ply board, is 0.8mm per thickness degree, therefore can design 15 height of punch cutting edge basil
For h=2.4mm.
(3) Fig. 6 is the scheme of installation of the bevelled punch 11 of design, and during installation, blade tip position can be entered as the case may be
Row design.Preferably blade tip is aligned on the somewhere position in the symmetric position of punching neighboring area four under normal circumstances, this example
3D appearances 21 have higher surface quality requirements, therefore blade tip can be installed 20 position of alignment punching neighboring area.Additionally, being
When preventing punching, bevelled punch 11 rotates, and spacing plane 16 is devised on bevelled punch 11 (see Fig. 5).
(4) length of bevelled punch 11 is calculated as the following formula：
L=H1+H2+H3+h+t+Y
In formula：L is 11 length of bevelled punch；H1For 13 thickness of punch retainer；H2Die 9 is entered for bevelled punch 11
Depth；H3For binder plate thickness；H is 11 inclined edge cutting edge of bevelled punch height；T is punch area material thickness；Y is punch retainer
Safe distance between 13 and briquetting 10.
In the present embodiment：H1=20mm, H2=20mm, h=t=2.5mm, Y=15mm.
After considering factors above, with the principle for rounding, determine that 11 length of this example bevelled punch is L=60mm.
(5) Fig. 7 show optimization after 11 form of bevelled punch, bevelled punch 11 due to the presence of sharp sword, sword during punching
Sharp place is also easy to produce stress concentration, causes serious wear, to avoid this type of circumstances from happening, can be in a width of 0.5mm of design at blade tip
The plane 22 of left and right.The advantage of oblique edge blanking can so be retained, stress concentration is avoided again.
(6) additionally, for ensure the present invention effect, during stretch wrap forming, it is necessary to ensure that part patch mould it is tight.Extend power
Size determines preferably by test, should be able to generally make material that plastic deformation occurs, generally take 1.0～1.1 times of surrender
The product of intensity and area of section, i.e.,：
F=(1.0～1.1) σsA (4)
In formula, σsFor yield strength, Mpa；A is accumulated for transverse section of section material, mm2。
In this example material be SPD121BQ, yield strength σs=189Mpa, area of section A=130mm2, it may be determined that power of extending
F arranges 23400～25740N of interval.
The online hole-punching method of the present invention effectively reduces blanking pressure, reduces other auxiliary device to online punching and wants
Ask, have important meaning to the light-weight design of equipment；The online hole-punching method of the present invention can pass through the position for changing sharp sword
Improve material stress, so as to improve the forming quality of part and the stability of production, it is to avoid nearby surface indentation lacks for punching
Fall into, improving product presentation quality.
As described above, just can preferably realize the present invention.
Embodiments of the present invention are simultaneously not restricted to the described embodiments, other any spirit without departing from the present invention
With the change, modification, replacement made under principle, combine, simplify, should be equivalent substitute mode, be included in the present invention
Within protection domain.
Claims (8)
1. the bevelled punch (11) used in a kind of online punch process of stretch wrap forming, it is characterised in that bevelled punch (11)
Cutting edge is inclined edge, has the plane that a width is 0.3～0.5mm at the blade tip of inclined edge.
2. bevelled punch (11) according to claim 1 used in the online punch process of stretch wrap forming, it is characterised in that institute
The body side of bevelled punch (11) is stated, with a spacing plane (16).
3. bevelled punch (11) according to claim 2 used in the online punch process of stretch wrap forming, it is characterised in that institute
The inclined edge of bevelled punch (11) is stated highly less than or equal to the sheet thickness for treating punching position.
4. the online hole-punching method of a kind of stretch wrap forming, it is characterised in that using stretch wrap forming any one of claims 1 to 3
Bevelled punch (11) used in online punch process is realized, is comprised the steps：
Step one：The diameter of bevelled punch (11) cutting edge is calculated first, then on the basis of bevelled punch (11), determines die
(9) Blade dimensions, computing formula are as follows：
In formula：
dp, ddRespectively punching bevelled punch (11), die (9) nominal diameter (mm)；
D is the nominal diameter (mm) for treating punching part；
Δ is the design tolerance (mm) for treating punching hole diameter；
ZminFor bevelled punch (11), die (9) minimum double-faced clearance (mm)；
δp, δdRespectively bevelled punch (11), die (9) manufacturing tolerance (mm)；
X is the coefficient of waste, x=0.5～1.0；
Step 2：With reference to reference to formula (3), the height of the length and punch cutting edge basil (15) of bevelled punch (11) is determined：
L=H1+H2+H3+h+t+Y (3)
In formula：
L is bevelled punch (11) length；
H1For punch retainer (13) thickness；
H2It is bevelled punch (11) into die (9) depth；
H3Binder plate thickness；
H is the inclined edge cutting edge height of bevelled punch (11), should be less than or equal to t；
T is punch area material thickness；
Y is the safe distance between punch retainer (13) and briquetting (10).
5. the online hole-punching method of stretch wrap forming according to claim 4, it is characterised in that to make bevelled punch in blanking process
(11), die (9) does not rotate, and should be provided with the spacing plane of bevelled punch (11) in the side of bevelled punch (11) body
(16) and corresponding die (9) spacing plane.
6. the online hole-punching method of stretch wrap forming according to claim 4, it is characterised in that in blanking process, bevelled punch
(11) punch cutting edge basil (15) is also easy to produce stress concentration due to the presence of sharp sword at blade tip during punching, cause abrasion tight
Weight, to avoid this type of circumstances from happening, designs a width of 0.5mm or so facet (22) before punching at blade tip.
7. the online hole-punching method of stretch wrap forming according to claim 4, it is characterised in that in blanking process, be to ensure section bar
The crudy of online punching after stretch bending, the stretch wrap forming of previous operation should ensure that section bar patch mould closely, therefore stretch wrap forming
Power of extending size should be enough to make material that plastic deformation to occur, but be unlikely to excessive so as to cause section to be distorted, power of extending
Value is the product of 1.0～1.1 times of yield strength and area of section.
8. the online hole-punching method of stretch wrap forming according to claim 4, it is characterised in that in blanking process, bevelled punch
(11) cutting edge of cutting edge basil is highly thick less than or equal to the material for treating punching position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142809.3A CN106583533A (en) | 2016-12-13 | 2016-12-13 | Inclined blade male die and method used in stretch-wrap bending on-line punching process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142809.3A CN106583533A (en) | 2016-12-13 | 2016-12-13 | Inclined blade male die and method used in stretch-wrap bending on-line punching process |
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| Publication Number | Publication Date |
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| CN106583533A true CN106583533A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611142809.3A Pending CN106583533A (en) | 2016-12-13 | 2016-12-13 | Inclined blade male die and method used in stretch-wrap bending on-line punching process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013850A (en) * | 2018-08-22 | 2018-12-18 | 安徽信息工程学院 | Improve the process of plate punching precision coincidence rate |
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| JPS617024A (en) * | 1985-06-08 | 1986-01-13 | Takatsu Seisakusho:Kk | Method and apparatus for manufacturing front pillar or the like of automobile |
| CN201702240U (en) * | 2010-06-23 | 2011-01-12 | 福州天宇电气股份有限公司 | Bus flat end surface shearing die |
| CN201823813U (en) * | 2010-09-25 | 2011-05-11 | 成都市龙泉通惠实业有限责任公司 | Punch forming mould |
| CN202097269U (en) * | 2011-05-04 | 2012-01-04 | 东风锻造有限公司 | Sidestep type gear amplitude plate punch |
| CN202212460U (en) * | 2011-08-26 | 2012-05-09 | 江铃汽车股份有限公司 | Stamping male die |
| CN203002913U (en) * | 2012-11-06 | 2013-06-19 | 柳州市昌河模具厂 | Punching mold used for automobile back shaft support assembly trailing arm beam |
| CN203599353U (en) * | 2013-10-22 | 2014-05-21 | 步阳集团有限公司 | Novel punching die |
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2016
- 2016-12-13 CN CN201611142809.3A patent/CN106583533A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617024A (en) * | 1985-06-08 | 1986-01-13 | Takatsu Seisakusho:Kk | Method and apparatus for manufacturing front pillar or the like of automobile |
| CN201702240U (en) * | 2010-06-23 | 2011-01-12 | 福州天宇电气股份有限公司 | Bus flat end surface shearing die |
| CN201823813U (en) * | 2010-09-25 | 2011-05-11 | 成都市龙泉通惠实业有限责任公司 | Punch forming mould |
| CN202097269U (en) * | 2011-05-04 | 2012-01-04 | 东风锻造有限公司 | Sidestep type gear amplitude plate punch |
| CN202212460U (en) * | 2011-08-26 | 2012-05-09 | 江铃汽车股份有限公司 | Stamping male die |
| CN203002913U (en) * | 2012-11-06 | 2013-06-19 | 柳州市昌河模具厂 | Punching mold used for automobile back shaft support assembly trailing arm beam |
| CN203599353U (en) * | 2013-10-22 | 2014-05-21 | 步阳集团有限公司 | Novel punching die |
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| Title |
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| 王同海等: "《实用冲压设计技术》", 30 April 1995, 机械工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013850A (en) * | 2018-08-22 | 2018-12-18 | 安徽信息工程学院 | Improve the process of plate punching precision coincidence rate |
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