CN105046035B - A kind of sheet metal part compensation for sag design method - Google Patents
A kind of sheet metal part compensation for sag design method Download PDFInfo
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- CN105046035B CN105046035B CN201510583419.9A CN201510583419A CN105046035B CN 105046035 B CN105046035 B CN 105046035B CN 201510583419 A CN201510583419 A CN 201510583419A CN 105046035 B CN105046035 B CN 105046035B
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Abstract
The present invention discloses a kind of sheet metal part compensation for sag design method, comprises the following steps, 1) expanding data collection is made to the sagging sheet metal part of band, the profile boundaries line in data set with place of sinking is set to L3, sheet metal part sink side profile boundaries line be set to L1, L3With L1It is adjacent；2) starting point C of the critical point of the sagging termination deformation of sheet metal part crimp as expansion compensation of sinking is selected in data set；3) the maximum of points B of sheet metal part expansion expansion amount is designed in data set, tie point B, C, obtains line segment BC；4) tangent line that point B does the circular arc that sunk in sheet metal part is crossed in data set, the point of contact of the tangent line and sagging circular arc is set to D, tie point D, B, obtains line segment BD；5) chamfering is carried out between line segment BC and line segment BD, the closed area of formation is expansion compensation of sinking.Ensure that the sagging sheet metal part developed dimension of band meets shaping needs, improve sheet metal part blanking accuracy and operating efficiency, save manufacturing cost.
Description
Technical field
The present invention relates to sheet metal part manufacture field, and in particular to a kind of sheet metal part compensation for sag design method.
Background technology
During aircraft manufacturing, sheet metal part is most common a kind of part, due to aircraft manufacturing and assembly precision compared with
Height, therefore it is higher to sheet metal part requirement on machining accuracy.But in sheet metal part, the sagging sheet metal part of band is more, this kind of
Design of part is special, and the developed dimension calculated by calculation formula does not often meet actual production, and part meeting in forming process exists
There is the phenomenon of strong contraction in sagging place, and local size situation less than normal occurs near trimming of sinking in sheet metal part, and then
Cause part overproof and scrap.For mass-producted band sink sheet metal part for, it is such the problem of be urgent need to resolve, be
Solve the above problems, when band sink sheet metal part processing, typically by worker, with personal experience, in woollen, locally increase is corresponding
Compensate size.But to increase blank size with personal experience not accurate enough by worker, it is impossible to avoids parts locally size inclined completely
The occurrence of small, artificial blanking is of poor quality, and efficiency is low, is unfavorable for producing in batches.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of sheet metal part compensation for sag design method, ensures that band sink
Sheet metal part developed dimension meets shaping needs, and local size is not less than theoretical value after shaping, and it is accurate to improve sheet metal part blanking
Degree and operating efficiency, save manufacturing cost.
The present invention use technical scheme for：
A kind of sheet metal part compensation for sag design method, comprises the following steps,
1) expanding data collection is made to the sagging sheet metal part of band, the profile boundaries line in data set with place of sinking is set to
L3, sheet metal part sink side profile boundaries line be set to L1, L3With L1It is adjacent；
2) critical point the rising as expansion compensation of sinking of the sagging termination deformation of sheet metal part crimp is selected in data set
Initial point C；
3) the maximum of points B of sheet metal part expansion expansion amount is designed in data set, tie point B, C, obtains line segment BC；
4) tangent line that point B does the circular arc that sunk in sheet metal part is crossed in data set, the point of contact of the tangent line and sagging circular arc is set
For D, tie point D, B, line segment BD is obtained；
5) carry out chamfering between line segment BC and line segment BD, form chamfering R, L in data set1、L3, line segment BC, line segment BD and
The closed area that chamfering R is formed is expansion compensation of sinking.
A kind of described sheet metal part compensation for sag design method, the step 2) are specially with metal plate zero in data set
Make tangent line L in part crimp interior angle point of contact2, tangent line L2With L1Intersection point be sink expansion compensation starting point C.
A kind of described sheet metal part compensation for sag design method, the step 3) is specifically, L on data set3With L1It is intersecting
In point A, the thickness of the sheet metal part is δ mm, crosses A points in L3Extended line on to make point B, line segment AB length be δ+0.5mm, i.e.,
Invocation point B.
A kind of described sheet metal part compensation for sag design method, L on data set3With L1Between there is chamfering R1, the step
It is rapid 3) specially to make L on data set3And L1Extended line intersect at point A, the thickness of the sheet metal part is δ mm, cross A points in L3
Extended line on to make point B, line segment AB length be δ+0.5mm, i.e. invocation point B.
A kind of described sheet metal part compensation for sag design method, the chamfering R are equal to chamfering R1。
A kind of described sheet metal part compensation for sag design method, in the step 5), line segment BC and chamfering R point of contact are
E, line segment BD and chamfering R point of contact are F, L in data set1、L3, the closed area that is formed of line segment CE, line segment DF and chamfering R be
Expansion of sinking compensates.
The invention has the advantages that：
A kind of sheet metal part compensation for sag design method of the present invention ensure that band sink sheet metal part developed dimension meet into
Shape needs, and after shaping, local size is not less than theoretical value.This method is simple and easy, can be directly used for the sagging sheet metal part of band
Blanking.The present invention is by selecting the critical point of sheet metal part deformation to be used as the starting point of compensation for sag, and based on experience value, selection is closed
Reason expansion expansion amount, the maximum of points and the starting point for expansion compensation of sinking of expansion amount are connected to form a line segment, then in mistake
The maximum of points of expansion amount does the tangent line of sagging circular arc, then carries out chamfering to line segment and tangent line, so as to the closed area formed
Expansion of as sinking compensates.This method can quickly generate sheet metal part two-dimensional development data set, by this two-dimensional development data set
The forming requirements of sheet metal part can be met by carrying out blanking, solve Design spreading data set according to a conventional method be formed and
The problem of caused local form's size is less than normal.
The inventive method is to carry out CNC cutting to sheet metal part, reduces artificial blanking risk less than normal, improves work
Efficiency and the accuracy of sheet metal part shaping, save cost.
The inventive method can be widely used for the field of machining that aviation, automobile etc. are related to sheet-metal baiting.
Brief description of the drawings
Fig. 1 is the sagging sheet metal part of crimp band in embodiment.
Fig. 2 is the front view of sheet metal part shown in Fig. 1.
Fig. 3 be in Fig. 2 A-A to sectional view.
Fig. 4 is the expanding data collection of sheet metal part shown in Fig. 1.
Fig. 5 is that the sagging sheet metal part of crimp band deploys Compensation Design schematic diagram in embodiment.
Fig. 6 is expansion Compensation Design partial enlarged drawing shown in Fig. 5.
Fig. 7 is expanding data collection of the sheet metal part with compensation for sag in embodiment.
Wherein 1- sheet metal parts, 2- crimps, 3- are sunk, 4- profile boundaries lines, and 5- crimp interior angle tangent lines, 6- crimp interior angles are cut
Point, 7-, which sink, deploys compensation
Embodiment
Embodiment
Have sagging 3 on a kind of crimp 2 of sheet metal part 1 as Figure 1-3, be illustrated in figure 4 the exhibition of the sheet metal part 1
Open data set.Profile boundaries line 4 and crimp interior angle tangent line 5 on data set with the sheet metal part 1 etc., crimp interior angle tangent line 5
For the tangent line made with crimp interior angle point of contact 6, a point is faced in the crimp interior angle point of contact 6 as deformation of sheet metal part 1.
A kind of sheet metal part compensation for sag design method, comprises the following steps,
1) to making expanding data collection with sagging sheet metal part 1, there is the profile boundaries line 4 at sagging 3 in data set
It is set to L3, in sheet metal part 1 with L3An adjacent profile boundaries line 4 is set to L1；
2) in data set select sheet metal part 1 in crimp 2 sink termination deformation critical point as sink expansion compensate 7
Starting point C；Tangent line L is made with sheet metal part crimp interior angle point of contact 6 specially in data set2, tangent line L2With L1Intersection point be
Sink the starting point C that expansion compensates.
3) L on data set as shown in figs. 4-73With L1Between there is chamfering R1, make L in data set3And L1Extended line phase
Point A is met at, if the thickness of the sheet metal part 1 is δ mm, crosses A points in L3Extended line on make point B, line segment AB length be δ+
0.5mm, i.e. invocation point B, point B are the maximum of points B that sheet metal part 1 deploys expansion amount in data set, tie point B, C, obtain line segment
BC；
4) tangent line that point B does 3 circular arcs of being sunk in sheet metal part 1 is crossed in data set, the tangent line is cut with 3 circular arcs that sink
Point is set to D, tie point D, B, obtains line segment BD；
5) chamfering is carried out between line segment BC and line segment BD, forms chamfering R, chamfering R is equal to chamfering R1, line segment BC and chamfering
R point of contact is that E, line segment BD and chamfering R point of contact are F, L in data set1、L3, the closing that is formed of line segment CE, line segment DF and chamfering R
Region is expansion compensation 7 of sinking.
Claims (1)
- A kind of 1. sheet metal part compensation for sag design method, it is characterised in that comprise the following steps,1) expanding data collection is made to the sagging sheet metal part of band, the profile boundaries line in data set with place of sinking is set to L3, metal plate The sagging side profile boundaries line of part is set to L1, L3With L1It is adjacent；2) starting point of the critical point of the sagging termination deformation of sheet metal part crimp as expansion compensation of sinking is selected in data set C；Tangent line L is made with sheet metal part crimp interior angle point of contact specially in data set2, tangent line L2With L1Intersection point be sink expansion The starting point C of compensation；3) the maximum of points B of sheet metal part expansion expansion amount is designed in data set, tie point B, C, obtains line segment BC；Specially count According to the upper L of collection3With L1Between there is chamfering R1, make L on data set3And L1Extended line intersect at point A, the thickness of the sheet metal part For δ mm, A points are crossed in L3Extended line on to make point B, line segment AB length be δ+0.5mm, i.e. invocation point B；4) tangent line that point B does the circular arc that sunk in sheet metal part is crossed in data set, the point of contact of the tangent line and sagging circular arc is set to D, Tie point D, B, obtain line segment BD；5) carry out chamfering between line segment BC and line segment BD, form chamfering R, L in data set1、L3, line segment BC, line segment BD and chamfering The closed area that R is formed is expansion compensation of sinking；Specifically, the chamfering R is equal to chamfering R1；Line segment BC is cut with chamfering R's Point is E, and line segment BD and chamfering R point of contact is F, L in data set1、L3, the closed area that is formed of line segment CE, line segment DF and chamfering R Expansion of as sinking compensates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510583419.9A CN105046035B (en) | 2015-09-14 | 2015-09-14 | A kind of sheet metal part compensation for sag design method |
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| CN105046035B true CN105046035B (en) | 2018-01-16 |
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| CN107378418B (en) * | 2017-06-22 | 2019-03-19 | 哈尔滨飞机工业集团有限责任公司 | A kind of honeycomb method of deploying |
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| CN102982200A (en) * | 2012-11-06 | 2013-03-20 | 西北工业大学 | Design method of airplane frame and rib type sheet metal part processing model |
| CN104190772A (en) * | 2014-09-15 | 2014-12-10 | 沈阳飞机工业（集团）有限公司 | Tube-connecting sheet metal part bent edge expansion design method |
| CN104361146A (en) * | 2014-10-08 | 2015-02-18 | 中国航空工业集团公司西安飞机设计研究所 | Aerospace sheet metal part extruded section subsidence sunken part establishment method |
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2015
- 2015-09-14 CN CN201510583419.9A patent/CN105046035B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982200A (en) * | 2012-11-06 | 2013-03-20 | 西北工业大学 | Design method of airplane frame and rib type sheet metal part processing model |
| CN104190772A (en) * | 2014-09-15 | 2014-12-10 | 沈阳飞机工业（集团）有限公司 | Tube-connecting sheet metal part bent edge expansion design method |
| CN104361146A (en) * | 2014-10-08 | 2015-02-18 | 中国航空工业集团公司西安飞机设计研究所 | Aerospace sheet metal part extruded section subsidence sunken part establishment method |
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| Title |
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| "Automated Aircraft Sheet Metal Component Production Technologies";K.S.R.K.Prasad.et al.;《JOURNAL OF AIRCRAFT》;20070831;第44卷(第04期);第1129-1138页 * |
| "带下陷航空钣金零件展开及参数化建模研究";曹蔚，等;《锻压技术》;20101031;第35卷(第05期);第148-150页 * |
| "钣金件腹板下陷展开设计优化分析";匡志华;《万方数据》;20150826;第50页 * |
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