CN101767158A - Metal tube round hole flaring method - Google Patents
Metal tube round hole flaring method Download PDFInfo
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- CN101767158A CN101767158A CN201010042045A CN201010042045A CN101767158A CN 101767158 A CN101767158 A CN 101767158A CN 201010042045 A CN201010042045 A CN 201010042045A CN 201010042045 A CN201010042045 A CN 201010042045A CN 101767158 A CN101767158 A CN 101767158A
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Abstract
The invention relates to a metal tube round hole flaring method, comprising the following steps: positioning a metal tube by a positioning mechanism to prevent the metal tube from moving when extrusion flaring is carried out; and enabling an extrusion head pushed by a power unit to enter the flaring end of the metal tube and move axially along the metal tube until the extrusion head reaches the end point of the journey, wherein pushing speed of the extrusion head is v<=13mm/S and extrusion force is F=ZNsigmab(1+kmu(D/4H))A. In the invention, relevant data of the metal tube and the extrusion head are utilized to obtain flaring control data (speed and extrusion force), the desired flaring can be stably obtained by processing according to the control data, and the molding is stable after flaring. The method is easily operated, and avoids damage to the metal tube caused by experience-based flaring and strong reliability of metal tube of the experience-based flaring. Because the round hole does not retract after flaring, the consistency of products is good.
Description
Technical field
The present invention relates to the processing method in hole, specifically refer to a kind of on the basis of the original mouth of pipe of metal cylinder the method to its enlarging.
Background technology
Based on various purposes, carrying out the enlarging processing on the original mouth of pipe of metal cylinder basis has suitable practical occasion.Enlarging at present mainly contains two kinds of technologies: cutter bore hole and compression flare.The cutter bore hole normally utilizes dedicated tool that original metal cylinder is carried out machining on Digit Control Machine Tool, and cutting output and working depth are controlled by the control circuit on the Digit Control Machine Tool.Though this enlarging mode machining accuracy height is controlled good, often can not one-shot forming, need repeatedly bore hole, so efficient is low, equipment has high input, and big to some irregularly-shaped hole difficulty of processing.In addition, bore hole only can satisfy the size needs of endoporus.As when running into an end and being the part of big head shapes, in order to reach the net shape of part, often need to select maximum outside diameter to carry out inside and outside processing again as base pipe size with stub end, not only waste raw material greatly, and increased manufacturing procedure, reduced production efficiency.
Compression flare is to utilize extrusion head directly to push on original mouth of pipe to form.Because it is corresponding with the enlarging shape that the shape of extrusion head is processed in advance, therefore can one-shot forming.After the enlarging, the material external diameter also can form and the extrusion head similar shapes, and external diameter also can increase formation head allowance.So just can use the base pipe of less outside dimension to process some major part parts, thereby reach economical with materials, reduce the purpose of manufacturing procedure.The speed of compression flare moulding is directly related with the extrusion head fltting speed, and enlarging shape adaptive surface is big.Though compression flare efficient height has requirement to the hardness of metal cylinder, limitation is bigger, and really up to the mark then rising easily split, cross soft when then pushing metal cylinder can bend.And the correlative factor that extrusion process relates to is more, except material hardness, also comprises factors such as metal cylinder internal diameter, external diameter, thickness, how to select suitable extruding force and fltting speed to be difficult to grasp, and can only rule of thumb come compression flare at present.
Summary of the invention
At existing enlarging technology above shortcomings, the purpose of this invention is to provide a kind of metal tube round hole flaring method of easy grasp.
Technical scheme of the present invention is achieved in that
A kind of metal tube round hole flaring method the steps include:
(1) metal cylinder is located by detent mechanism, produce when avoiding compression flare and move; Metal cylinder hardness is HB75 °～110 °, wall thickness 5～10mm, external diameter 30～80mm;
(2) extrusion head enters the metal cylinder flared end and along the metal cylinder axially-movable under the promotion of actuating unit, arrives the terminal point of stroke, the fltting speed v≤13mm/S of extrusion head, extruding force up to extrusion head
Extrusion head is the hard extrusion head, its shape is corresponding with the enlarging that needs moulding, extrusion head constitutes by being positioned at the front end guide section that play the guiding role corresponding with nozzle diameter size before the extruding, being positioned at the deformation section of the main metamorphosis of middle and being positioned at the tail end typing section that plays styling corresponding with pushing back nozzle diameter size, and the deformation section longitudinal section is shapes such as isosceles trapezoid, cydariform, dumb-bell shape;
In the formula, F is an extruding force, and H is an extrusion head deformation section height, and D is an extrusion head guide section diameter; A is the poor of guide section and typing section cross-sectional area, σ
bBe extrded material tensile strength, Z is a deformation coefficient, and N is the tool shape coefficient, and k is the crimping section form factor, and μ is a friction factor.
Further, described extrded material tensile strength sigma
bBe 350～550Mpa, deformation coefficient Z is 1～1.8, and tool shape coefficient N is 1～2.5, and crimping section form factor k is 1.3～3, and friction factor μ is 0.05～0.3.
The present invention can obtain the control data (speed and extruding force) of enlarging according to the related data of metal cylinder and extrusion head, processes according to this control data and can stably obtain required enlarging, and the enlarging aftershaping is stable.This method is easy to grasp, and avoided the damage to metal cylinder that relies on the experience enlarging to bring, and the experience enlarging is strong to the dependence of metal cylinder.Because the enlarging metapore can not bounce back good product consistency.
Description of drawings
Fig. 1-extrusion head structure schematic diagram of the present invention;
Fig. 2-extrusion head deformation section different shape schematic diagram of the present invention.
The specific embodiment
The invention will be further described below in conjunction with the specific embodiment.
Metal tube round hole flaring method of the present invention the steps include:
(1) metal cylinder is located by detent mechanism, produce when avoiding compression flare and move;
(2) extrusion head enters the metal cylinder flared end and along the metal cylinder axially-movable, arrives the terminal point of stroke up to extrusion head under the promotion of actuating unit.Extrusion head is the hard extrusion head, and its shape is corresponding with the enlarging that needs moulding.The compression flare method requires to exist between the size of the metal cylinder enlarging sector hole size inevitable and not enlarging sector hole the transition on the size, be that the aperture can not a step diffuse into the position, need phase in, otherwise can't enlarging by this method, so metal cylinder constitutes-not flared section, changeover portion and flared section by three sections after the enlarging.Correspondingly, extrusion head also constitutes-is positioned at the front end guide section that play the guiding role 1 corresponding with nozzle diameter size before the extruding, is positioned at the deformation section 2 of the main metamorphosis of middle and is positioned at the tail end typing section 3 that play styling corresponding with pushing back nozzle diameter size by three sections and constitutes, and sees Fig. 1; Deformation section 2 longitudinal sections are shapes such as isosceles trapezoid, cydariform, dumb-bell shape, the distortion of metal cylinder mainly at deformation section through out-of-date generation.
Key of the present invention is to determine the fltting speed and the extruding force of extrusion head.The fltting speed of extrusion head is slow more in theory, help material deformation more, but this influences production efficiency, takes all factors into consideration the back and determines fltting speed v≤13mm/S.
And extruding force is relevant with material behavior, as material hardness, thickness, diameter etc.The hardness of material requires between HB75 °～110 °, causes material to become curved easily during too soft extruding, and the too high material that then makes easily of hardness breaks when being out of shape.It is 5～10mm that this method requires wall thickness, and external diameter is 30～80mm.External diameter is more little, and wall thickness answers corresponding selection than small dimension, otherwise the easy flexural deformation of material.The extruding force computing formula is:
In the formula: F---extruding force (N);
H---extrusion head deformation section height (mm);
D---extrusion head guide section diameter (mm);
Poor (the mm of A---guide section and typing section cross-sectional area
2);
Wherein d is an extrusion head typing section diameter;
σ
bBe extrded material tensile strength, σ
bBe 350～550Mpa; Z is a deformation coefficient, and Z is 1～1.8; N is the tool shape coefficient, and N is 1～2.5; K is the crimping section form factor, and k is 1.3～3; μ is a friction factor, and μ is 0.05～0.3.The concrete value of these five coefficients is according to different situations, provided by following table in conjunction with experience.
Extrded material tensile strength can directly find on relevant handbook, and last tabular has gone out the extrded material tensile strength values of four kinds of more steel of practical application.
The pre-extrusion process that refers to 1 pair of metal cylinder of guide section of squeezing in the deformation coefficient operation, the smart extrusion process that refers to 2 pairs of metal cylinder of deformation section of squeezing; Shape refers to extrusion head deformation section 2 vertical sectional shapes.If extrusion head deformation section 2 longitudinal sections are the shape of straight line or smooth curve, then be called simply, as the isosceles trapezoid of Fig. 2 a, the cydariform of Fig. 2 b, the shapes such as dumb-bell shape of Fig. 2 c.If be some full curves or corner angle line segment, then be referred to as complexity, as Fig. 2 d and Fig. 2 e.
Depression in the tool shape coefficient refers to whether deformation section 2 surfaces have depression, and depression comprises evagination and indent (as the cydariform of Fig. 2 b, the dumb-bell shape of Fig. 2 c), and straight line (as the isosceles trapezoid of Fig. 2 a) does not then have depression; Corner angle refer between guide section and the deformation section whether level and smooth (camber line) transition, as corner angle are nothing in order to seamlessly transit then, otherwise for having.
The crimping section form factor refers to deformation section 2 shape of cross sections.
" face " in the friction factor refers to deformation section 2 surfaces, be divided into grinding and two kinds of processing modes of fine finishining, and whether lubricated the finger adds lubriation material in the compression flare process.
In order to be more conducive to extruding, the extrusion head guide section can be designed as the structure of certain taper, and guide section is slightly less than the metal cylinder diameter foremost, and the guide section tail end is slightly larger than the metal cylinder diameter, and a pre-extrusion process is arranged in the guiding process like this.And in order to tackle the problem of metal cylinder extruding back resilience, the present invention will the section of typing also be designed to the structure of certain taper, typing section diameter foremost equals metal cylinder enlarging actual diameter, typing section tail end is slightly larger than metal cylinder enlarging actual diameter, be the size of the size of enlarging metapore greater than actual needs, when shrinking because of resilience, just in time be retracted to actual size, promptly leave the compensation surplus in advance.If extrusion head guide section and typing section have certain taper, the D of front indication just should be the guide section maximum gauge so, and d just should be a typing section minimum diameter.
This method has the metal cylinder of big header structure at an end specially and designs, and the processing that its method derives from first to motorcycle inversed front shock absorber urceolus improves.The original processing technology of inversed front shock absorber urceolus is: adopt the base pipe of big outside dimension specification to carry out bore hole processing, reprocess cylindrical at last.Because urceolus is shaped as a kind of major part Shape Parts, therefore adding often needs to determine the base external diameter of pipe by the maximum outside diameter of part man-hour, like this, adds and will remove a large amount of unnecessary materials man-hour, causes waste, and can increase process time, and efficient is low.This method is the efficient height not only, and can save lot of materials, and can be generalized to all final forms from the inversed front shock absorber urceolus is the enlarging that an end has the metal cylinder of big header structure.
Claims (3)
1. a metal tube round hole flaring method is characterized in that: the steps include:
(1) metal cylinder is located by detent mechanism, produce when avoiding compression flare and move; Metal cylinder hardness is HB75 °～110 ° degree, wall thickness 5～10mm, external diameter 30～80mm;
(2) extrusion head enters the metal cylinder flared end and along the metal cylinder axially-movable under the promotion of actuating unit, arrives the terminal point of stroke, the fltting speed v≤13mm/S of extrusion head, extruding force up to extrusion head
Extrusion head is the hard extrusion head, its shape is corresponding with the enlarging that needs moulding, and extrusion head constitutes by being positioned at the front end guide section (1) corresponding with nozzle diameter size before the extruding, being positioned at the deformation section (2) at middle part and being positioned at the tail end typing section (3) corresponding with pushing back nozzle diameter size;
In the formula, F is an extruding force, and H is an extrusion head deformation section height, and D is an extrusion head guide section diameter; A is the poor of guide section and typing section cross-sectional area, σ
bBe extrded material tensile strength, Z is a deformation coefficient, and N is the tool shape coefficient, and k is the crimping section form factor, and μ is a friction factor.
2. metal tube round hole flaring method according to claim 1 is characterized in that: described extrded material tensile strength sigma
bBe 350～550Mpa, deformation coefficient Z is 1～1.8, and tool shape coefficient N is 1～2.5, and crimping section form factor k is 1.3～3, and friction factor μ is 0.05～0.3.
3. metal tube round hole flaring method according to claim 1 and 2 is characterized in that: described deformation section (2) longitudinal section is isosceles trapezoid, cydariform or dumb-bell shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010042045A CN101767158A (en) | 2010-01-12 | 2010-01-12 | Metal tube round hole flaring method |
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| CN201010042045A CN101767158A (en) | 2010-01-12 | 2010-01-12 | Metal tube round hole flaring method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699165A (en) * | 2012-06-01 | 2012-10-03 | 南通虹波机械有限公司 | Inner-barrel single mould pressing technology |
| CN104577637A (en) * | 2015-01-08 | 2015-04-29 | 番禺得意精密电子工业有限公司 | Manufacturing method for metal shell and electric coupler thereof |
| CN105618602A (en) * | 2014-12-01 | 2016-06-01 | 中航贵州飞机有限责任公司 | Flaring device for thick-wall stainless steel pipe fitting |
| CN107186096A (en) * | 2017-07-14 | 2017-09-22 | 熊卓成 | For by the structure and method of the automobile-used special-shaped swollen type of tube portion |
| CN107214259A (en) * | 2017-07-14 | 2017-09-29 | 熊卓成 | The swollen type drift and swollen type method of automobile-used special pipe |
| CN109773062A (en) * | 2019-02-21 | 2019-05-21 | 上海图博可特石油管道涂层有限公司 | A kind of cold expanding dedicated anti-necking formed punch of line pipe |
| CN110802178A (en) * | 2019-10-12 | 2020-02-18 | 珠海格力智能装备有限公司 | Flaring control method, flaring control device, storage medium and electronic equipment |
-
2010
- 2010-01-12 CN CN201010042045A patent/CN101767158A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699165A (en) * | 2012-06-01 | 2012-10-03 | 南通虹波机械有限公司 | Inner-barrel single mould pressing technology |
| CN102699165B (en) * | 2012-06-01 | 2014-12-10 | 南通虹波机械有限公司 | Inner-barrel single mould pressing technology |
| CN105618602A (en) * | 2014-12-01 | 2016-06-01 | 中航贵州飞机有限责任公司 | Flaring device for thick-wall stainless steel pipe fitting |
| CN104577637A (en) * | 2015-01-08 | 2015-04-29 | 番禺得意精密电子工业有限公司 | Manufacturing method for metal shell and electric coupler thereof |
| CN104577637B (en) * | 2015-01-08 | 2017-05-10 | 番禺得意精密电子工业有限公司 | Manufacturing method for electric coupler |
| CN107186096A (en) * | 2017-07-14 | 2017-09-22 | 熊卓成 | For by the structure and method of the automobile-used special-shaped swollen type of tube portion |
| CN107214259A (en) * | 2017-07-14 | 2017-09-29 | 熊卓成 | The swollen type drift and swollen type method of automobile-used special pipe |
| CN109773062A (en) * | 2019-02-21 | 2019-05-21 | 上海图博可特石油管道涂层有限公司 | A kind of cold expanding dedicated anti-necking formed punch of line pipe |
| CN110802178A (en) * | 2019-10-12 | 2020-02-18 | 珠海格力智能装备有限公司 | Flaring control method, flaring control device, storage medium and electronic equipment |
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Owner name: CHONGQING XIAOKANG AUTOMOBILE GROUP CO., LTD. Free format text: FORMER OWNER: SOKON AUTOMOBILE INDUSTRY (GROUP) CO., LTD. Effective date: 20110330 |
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Free format text: CORRECT: ADDRESS; FROM: 400033 NO. 2, JINGXI ROAD, JINGKOU TOWN, SHAPINGBA DISTRICT, CHONGQING CITYTO: 400037 NO. 61-1, JINQIAO ROAD, SHAPINGBA DISTRICT, CHONGQING CITY |
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Effective date of registration: 20110330 Address after: 400037 No. 61-1 Jinqiao Road, Shapingba District, Chongqing Applicant after: Chongqing Sokon Automobile Group Co., Ltd. Address before: 400033, No. 2 ho Xi Road, wellhead Town, Shapingba District, Chongqing Applicant before: Xiaokang Auto Industry (Group) Co., Ltd. |
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