CN108213143B - A kind of design method of the progressive flanging forming tool heads of cylinder - Google Patents

A kind of design method of the progressive flanging forming tool heads of cylinder Download PDF

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CN108213143B
CN108213143B CN201810210431.9A CN201810210431A CN108213143B CN 108213143 B CN108213143 B CN 108213143B CN 201810210431 A CN201810210431 A CN 201810210431A CN 108213143 B CN108213143 B CN 108213143B
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diameter
cone
frustum
height
cylindrical
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CN108213143A (en
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张大伟
施天琳
田冲
赵升吨
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Xian Jiaotong University
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Xian Jiaotong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00Flanging or other edge treatment, e.g. of tubes
    • B21D19/02Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass

Abstract

A kind of design method of the progressive flanging forming tool heads of cylinder, first design has 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 cylindrical body 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 that the height and diameter of cylindrical body, forming tool head of the present invention can complete the progressive flanging forming of single pass or the progressive flanging forming of multi-pass of cylindrical member.

Description

A kind of design method of the progressive flanging forming tool heads of cylinder
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 cylinder Method.
Background technique
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, the head structure used is broadly divided into two types in the research of progressive flanging forming.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.Chinese patent (application number CN 201310480432) proposes A kind of method for realizing thin-wall tube tube wall pre-manufactured hole hole flanging using progressive molding technique, uses forming tool head to complete tube wall Hole flanging forming, but do not specifically give head structure method for determining dimension.
For the above-mentioned conical tool heads that can be realized 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, not having also for the structure size of tool heads and explicitly setting in existing research Meter method.
Summary of the invention
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 cylinder Have head design method, 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 cylinder, comprising the following steps:
Step 1: design has the forming tool head of circular cone structure form, forming tool head is revolving body, revolving body Lower end is the knife bar 1 that diameter is d, as clamp area;The top of knife bar 1 is that lower surface diameter is D1, upper surface diameter is D2, 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 22, height h2Cylindrical body 3, make For flanging forming area;Round-corner transition is equipped between the tapered surface of the frustum of a cone 2 and lower surface and cylindrical body 3;
Step 2: determining the diameter d of knife bar 1, the value range of diameter d is 10~20mm;
Step 3: determining 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 the internal diameter d of cylindrical member 41, outside diameter d2, thickness t, pre-drilled cavity major axis dimension a, minor axis dimension b, flange branch bore dm、 Flange branch pipe outside diameter dtIt is related with flange height H;During cylinder progressive flanging forming, the limit of single pass progressive molding is turned over Side height is Hmax
As flange height H≤Hmax, then the progressive flanging forming of single pass is used;In forming process, cylindrical member 4 occurs curved The maximum length of song deformation is l=h1min× tan θ is established X-axis with the cylinder axis of cylindrical member 4, is built with the pipe axis of flange branch pipe Vertical Z axis, establishes corresponding Y-axis perpendicular to X, Z axis, the cylindrical member volume to deform before flange isWhereinX, y is each curve in XOY plane The value of interior projection;The cylindrical member volume to deform after flange isWhereinAccording to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then by following formula Determine the height h of the frustum of a cone 21Minimum value h1min: WhereinAnd dm=b+2h1min;Therefore, in cylinder During the progressive flanging forming of body single pass, the height h of the design tool head frustum of a cone 21It should be greater than the minimum value calculated, i.e. h1≥ h1min
As flange height H > Hmax, then the progressive flanging forming of multi-pass is used;In the process of the progressive flanging forming of multi-pass In, need traverse feed a distance Δ l, maximum transversal amount of feeding Δ l to determine between each forming passage as needed, and horizontal It is t≤Δ l≤h to the value condition of amount of feeding Δ l1Thus × tan θ obtains the height h of the tool heads frustum of a cone 21Minimum value beTherefore, during multi-pass cylinder progressive flanging forming, the height h of the design tool head frustum of a cone 21Ying great In 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;
Step 4: determining the height h of cylindrical body 32With diameter D2;The height h of cylindrical body 32Value range be 10~ 30mm;The diameter D of cylindrical body 32With the upper surface diameter D of the frustum of a cone 22It is in the same size, i.e. the diameter D of cylindrical body 32Value be D2=D1+2h1×tanθ。
The invention has the advantages that proposing a kind of simple, easy cylinder 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 is suitable for single pass and multiple tracks The progressive flanging forming of the cylinder of secondary production, has a wide range of application.
Detailed description of the invention
Fig. 1 is the head structure schematic diagram that the present invention has circular cone structure form.
Fig. 2 is to establish cylinder reference axis schematic diagram.
Fig. 3 is the progressive flanging forming schematic diagram of cylinder single pass.
Fig. 4 is volume change schematic diagram before and after the progressive flanging forming of cylinder single pass.
Fig. 5 is the progressive flanging forming schematic diagram of cylinder multi-pass.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of design method of the progressive flanging forming tool heads of cylinder, comprising the following steps:
Step 1: referring to Fig.1, design has the forming tool head of circular cone structure form, and forming tool head is revolving body, The lower end of revolving body is the knife bar 1 that diameter is d, is mounted on heavy caliber thick wall cylinder gradually for connecting with knife handle as clamp area Into on flexible hemmer;The top of knife bar 1 is that lower surface diameter is D1, upper surface diameter is D2, it is highly h1, cone angle is θ's The frustum of a cone 2, as bending deformation area, for making cylindrical member occur bending and deformation;It is diameter D above the frustum of a cone 22, height h2Circle Cylinder 3, as flanging forming area, for the cylindrical member to occur bending and deformation to be completed flanging forming;The tapered surface of the frustum of a cone 2 with Round-corner transition is equipped between lower surface and cylindrical body 3;
Step 2: referring to Fig.1, determining the diameter d of knife bar 1: to guarantee 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;
Step 3: referring to Fig.1, determining the relative dimensions of the frustum of a cone 2: 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 the internal diameter d of cylindrical member 41, outside diameter d2, thickness t, pre-drilled cavity major axis dimension a, minor axis dimension b, flange branch pipe Internal diameter dm, flange branch pipe outside diameter dtIt is related with flange height H, during cylinder progressive flanging forming, single pass progressive molding Limitative flanging height is Hmax
Referring to Fig. 2, Fig. 3 and Fig. 4, as flange height H≤Hmax, then the progressive flanging forming of single pass is used;In forming process In, the maximum length that cylindrical member 4 occurs bending and deformation is l=h1min× tan θ establishes X-axis with the cylinder axis of cylindrical member 4, to turn over The pipe axis of side branch pipe establishes Z axis, establishes corresponding Y-axis perpendicular to X, Z axis, and the cylindrical member volume to deform before flange isWhereinX, y is each curve in XOY plane The value of interior projection;The cylindrical member volume to deform after flange isWhereinAccording to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then by following formula Determine the height h of the frustum of a cone 21Minimum value h1min:Its InAnd dm=b+2h1min;Therefore, in cylinder During the progressive flanging forming of body single pass, the height h of the design tool head frustum of a cone 21It should be greater than the minimum value calculated, i.e. h1≥ h1min
Referring to Fig. 5, as flange height H > Hmax, then the progressive flanging forming of multi-pass is used;The progressive flange of multi-pass at During shape, traverse feed a distance Δ l is needed between each forming passage, maximum transversal amount of feeding Δ l is as needed It determines, and the value condition of lateral feed Δ l is t≤Δ l≤h1Thus × tan θ obtains the height h of the tool heads frustum of a cone 21's Minimum value isTherefore, in the progressive flangikng forming process of multi-pass, the height of the design tool head frustum of a cone 2 Spend h1It should be greater than the minimum value calculated, i.e.,
Referring to Fig.1, 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 table Face diameter D2Value be D2=D1+2h1×tanθ;
Step 4: referring to Fig.1, determining the height h of cylindrical body 32With diameter D2;The height h of cylindrical body 32Value range be 10~30mm;The diameter D of cylindrical body 32With the upper surface diameter D of the frustum of a cone 22It is in the same size, i.e. the diameter D of cylindrical body 32Take Value is D2=D1+2h1×tanθ。

Claims (1)

1. a kind of design method of the progressive flanging forming tool heads of cylinder, which comprises the following steps:
Step 1: design has the forming tool head of circular cone structure form, forming tool head is revolving body, the lower end of revolving body It is the knife bar (1) that diameter is d, as clamp area;Be above knife bar (1) lower surface diameter be D1, upper surface diameter is D2, 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 h2Cylindrical body (3), as flanging forming area;Round-corner transition is equipped between the tapered surface of the frustum of a cone (2) and lower surface and cylindrical body (3);
Step 2: determining the diameter d of knife bar (1), the value range of diameter d is 10~20mm;
Step 3: determining 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, that is, cone 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 height h of the frustum of a cone (2)1With the internal diameter d of cylindrical member (4)1, outside diameter d2, thickness t, pre-drilled cavity major axis dimension a, minor axis dimension b, turn over Side branch bore dm, flange branch pipe outside diameter dtRelated with flange height H, during cylinder progressive flanging forming, single pass is progressive The limitative flanging height of forming is Hmax
As flange height H≤Hmax, then the progressive flanging forming of single pass is used;In forming process, cylindrical member (4) bends The maximum length of deformation is l=h1min×tanθ;X-axis is established with the cylinder axis of cylindrical member (4), is built with the pipe axis of flange branch pipe Vertical Z axis, establishes corresponding Y-axis perpendicular to X, Z axis;The cylindrical member volume to deform before flange isWhereinX, y is each curve in XOY plane The value of interior projection;The cylindrical member volume to deform after flange isWhereinAccording to constancy of volume principle, volume is equal before and after flange, i.e. V0=V1, then under Formula determines the height h of the frustum of a cone (2)1Minimum value h1min: WhereinAnd dm=b+2h1min, therefore, During the progressive flanging forming of cylinder single pass, the height h of the design tool head frustum of a cone (2)1It should be greater than the minimum value calculated, i.e., h1≥h1min
As flange height H > Hmax, then the progressive flanging forming of multi-pass is used;During multi-pass progressive flanging forming, often Need traverse feed a distance Δ l, maximum transversal amount of feeding Δ l to determine between a forming passage as needed, and laterally into Value condition to amount Δ l is t≤Δ l≤h1Thus × tan θ obtains the height h of the tool heads frustum of a cone (2)1Minimum value beTherefore, during multi-pass cylinder progressive flanging forming, the height h of the design tool head frustum of a cone (2)1It answers Greater 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;
Step 4: determining the height h of cylindrical body (3)2With diameter D2;The height h of cylindrical body (3)2Value range be 10~ 30mm;The diameter D of cylindrical body (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 cylindrical body (3)2's Value is D2=D1+2h1×tanθ。
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132324A (en) * 1982-01-29 1983-08-06 Hitachi Ltd Formation for flange of casing for axialflow hydraulic machine
CN102172699A (en) * 2010-12-20 2011-09-07 西安交通大学 Spinning head for double-roll holding spinning forming of thin-wall rotary flange pieces
CN103480704A (en) * 2013-09-10 2014-01-01 西北工业大学 Incremental bending and forming method of hat-shaped member
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
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
CN104985041A (en) * 2015-06-15 2015-10-21 浙江上风高科专风实业有限公司 Housing case flanger and use method thereof
CN105598280A (en) * 2015-12-25 2016-05-25 佛山市成阳正大模具五金塑料有限公司 High-precision flanging die for thick plate and flanging process
CN106903204A (en) * 2017-01-22 2017-06-30 湖北三江航天江北机械工程有限公司 Multi-angle conical shell rotary press modelling method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132324A (en) * 1982-01-29 1983-08-06 Hitachi Ltd Formation for flange of casing for axialflow hydraulic machine
CN102172699A (en) * 2010-12-20 2011-09-07 西安交通大学 Spinning head for double-roll holding spinning forming of thin-wall rotary flange pieces
CN103480704A (en) * 2013-09-10 2014-01-01 西北工业大学 Incremental bending and forming method of hat-shaped member
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
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
CN104985041A (en) * 2015-06-15 2015-10-21 浙江上风高科专风实业有限公司 Housing case flanger and use method thereof
CN105598280A (en) * 2015-12-25 2016-05-25 佛山市成阳正大模具五金塑料有限公司 High-precision flanging die for thick plate and flanging process
CN106903204A (en) * 2017-01-22 2017-06-30 湖北三江航天江北机械工程有限公司 Multi-angle conical shell rotary press modelling method

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