CN110803002B - Design method of automobile hyperboloid door glass spiral line - Google Patents
Design method of automobile hyperboloid door glass spiral line Download PDFInfo
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- CN110803002B CN110803002B CN201911107196.3A CN201911107196A CN110803002B CN 110803002 B CN110803002 B CN 110803002B CN 201911107196 A CN201911107196 A CN 201911107196A CN 110803002 B CN110803002 B CN 110803002B
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- 239000011521 glass Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010408 sweeping Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
Abstract
The invention provides a design method of a hyperboloid vehicle door glass spiral line of an automobile, which comprises the steps of obtaining an initial axis of a glass surface through a front and rear boundary line of an outer modeling glass surface, respectively scanning a projection line of the front and rear boundary line on the modeling glass surface along the initial axis to obtain two curved surfaces, obtaining two intersected curved surfaces through an upper boundary line and a lower boundary line of the two scanned surfaces, finally obtaining two intersecting lines, drawing an axis through a midpoint of the two intersecting lines, judging whether the axis meets requirements or not through measuring the distance difference between the upper end point and the lower end point of the projection line of the front and rear boundary lines on the modeling glass surface and the axis, obtaining a final axis of the glass surface meeting the design requirements through repeating the process, and finally accurately designing the front spiral line and the rear spiral line of the glass surface through the spiral line pitch.
Description
Technical Field
The invention belongs to the technical field of door glass, and particularly relates to a design method of a hyperboloid door glass spiral line of an automobile.
Background
The design of the front spiral line and the rear spiral line is a key design point of the vehicle door glass, and is a design basis of a glass guide rail and a noise, and the lifting quality of the vehicle door glass is directly influenced by the design accuracy of the front spiral line and the rear spiral line. In order to meet the requirements of the molding style, most of the existing designs of the glass surface of the vehicle door adopt double curved surfaces, and after the glass curved surface is preliminarily determined, a front spiral line and a rear spiral line are preferably designed.
The prior art has a design method of a hyperboloid spiral line, but has the defects of complex process, low precision and the like.
Disclosure of Invention
The invention aims to provide a design method of a double-curved-surface door glass spiral line of an automobile, which can simply and accurately design a front spiral line and a rear spiral line of a glass surface. In order to achieve the purpose, the invention adopts the following technical scheme:
a design method of a double-curved-surface door glass spiral line of an automobile comprises the following steps:
step S1: extracting a front boundary line and a rear boundary line of the outer modeling glass surface, respectively fitting the front boundary line and the rear boundary line into a front circle and a rear circle, and connecting the centers of the front circle and the rear circle to obtain an initial axis;
step S2: acquiring an unfolded surface of an external modeling glass surface, projecting a first boundary line and a second boundary line, which are arranged in front and at the back of the external modeling glass surface, onto the unfolded surface respectively to acquire a first projection line and a second projection line, and then stretching the first projection line and the second projection line respectively by taking the initial axis as a direction to acquire a first curved surface and a second curved surface;
step S3: extracting a first upper boundary line and a first lower boundary line of the first curved surface, and respectively sweeping to obtain a third curved surface and a fourth curved surface based on the first upper boundary line and the first lower boundary line by taking the normal direction of the first curved surface as a direction; extending the third curved surface and the fourth curved surface to intersect to obtain a first intersection line;
extracting a second upper boundary line and a second lower boundary line of the second curved surface, and respectively sweeping to obtain a fifth curved surface and a sixth curved surface based on the second upper boundary line and the second lower boundary line by taking the normal direction of the second curved surface as the direction; extending the fifth curved surface and the sixth curved surface to intersect to obtain a second intersection line;
step S4: respectively taking the middle points of the first intersecting line and the second intersecting line, and connecting the middle points to obtain a second axis;
step S5: measuring the distances from the upper end point and the lower end point on the first projection line to a second axis respectively, and calculating a difference value I between the two distances; measuring the distances from the upper end point and the lower end point on the second projection line to a second axis respectively, and calculating a difference value two of the two distances;
step S6: respectively calculating a difference value between the first difference value and a preset value and a difference value between the second difference value and a preset value; if any difference is greater than 0, replacing the second axis with the initial axis in the step S1 and executing the step S1;
step S7: projecting the upper end point and the lower end point of the first projection line onto the second axis to form corresponding projection points; projecting the upper end point and the lower end point of the second projection line onto the second axis to form corresponding projection points;
calculating the distances between the upper end point and the lower end point of the first projection line and the projection point and the angles between the upper end point and the lower end point of the first projection line and the projection point; calculating the distance between the upper end point and the lower end point of the second projection line and the projection point, and the angle between the upper end point and the lower end point of the second projection line and the projection point;
step S8: and acquiring a front spiral line and a rear spiral line of the car door glass surface based on the second axis.
Preferably, the preset value is less than 0.05 mm.
Compared with the prior art, the invention has the advantages that: the front and back spiral lines of the glass surface can be designed simply and accurately, and the design precision is high.
Drawings
FIG. 1 is an illustration of an outer mold glass face and a schematic view of the initial axis of one embodiment of the present invention;
FIG. 2 is a schematic diagram of a second axis design method according to the present invention;
FIG. 3 is a schematic diagram of the front and back helix design of the present invention;
FIG. 4 is a schematic diagram of a comparison of an engineered glass surface and an outer shape glass surface obtained using the present invention;
FIG. 5 is a schematic view of the orientation of the outer shaping glass surface of the present invention.
Wherein 101-outer shape glass surface, 201-front boundary line, 202-rear boundary line, 301-front circle, 302-rear circle, 203-initial axis, 102-expansion plane, 204-first boundary line, 205-second boundary line, 206-first projection line, 207-second projection line, 208-first upper boundary line, 209-first lower boundary line, 210-first intersection line, 211-second upper boundary line, 212-second lower boundary line, 213-second intersection line, 214-second axis line, 215-final axis line, 217-front helix, 218-rear helix, 103-first curved surface, 104-second curved surface, 105-third curved surface, 106-fourth curved surface, 107-fifth curved surface, 108-sixth curved surface, 109-engineering glass surface.
Detailed Description
The method for designing a hyperboloid door glass spiral of an automobile according to the present invention will be described in more detail with reference to the schematic drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1 to 3, a method for designing a hyperboloid door glass spiral line of an automobile includes the following steps S1 to S8, specifically:
step S1: the front boundary line 201 and the rear boundary line 202 of the exterior shaped glass surface 101 are extracted, fitted to a front circle 301 and a rear circle 302, respectively, based on the front boundary line 201 and the rear boundary line 202, and the centers of the front circle 301 and the rear circle 302 are connected to obtain an initial axis 203. The direction of the outer shaping glass surface 101 is shown in fig. 5.
Step S2: the method comprises the steps of acquiring an unfolded surface 102 of an outer shape glass surface 101, projecting a first boundary line 204 and a second boundary line 205 of the outer shape glass surface 101, which are arranged in a front-back manner, onto the unfolded surface 102 respectively, acquiring a first projection line 206 and a second projection line 207, and then stretching the first projection line 206 and the second projection line 207 respectively in the direction of an initial axis 203 to acquire a first curved surface 103 and a second curved surface 104.
Step S3: extracting a first upper boundary line 208 and a first lower boundary line 209 of the first curved surface 103, and respectively sweeping the first upper boundary line 208 and the first lower boundary line 209 in the direction of the normal direction of the first curved surface 103 to obtain a third curved surface 105 and a fourth curved surface 106; the third curved surface 105 and the fourth curved surface 106 are extended to intersect to obtain a first intersection line 210.
Extracting a second upper boundary line 211 and a second lower boundary line 212 of the second curved surface 104, and respectively sweeping the fifth curved surface 107 and the sixth curved surface 108 based on the second upper boundary line 211 and the second lower boundary line 212 with the normal direction of the second curved surface 104 as a direction; the fifth curved surface 107 and the sixth curved surface 108 are extended to intersect to obtain a second intersection line 213.
Step S4: the midpoints of the first intersection line 210 and the second intersection line 213 are taken, respectively, and the midpoints are connected to obtain a second axis 214.
Step S5: measuring the distances from the upper end point and the lower end point on the first projection line 206 to the second axis 214 respectively, and calculating the difference value I between the two distances; the distances from the upper end point and the lower end point on the second projection line 207 to the second axis 214 are measured, and the difference between the two distances is calculated as two.
Step S6: respectively calculating a difference value between the first difference value and a preset value and a difference value between the second difference value and the preset value; if any difference is greater than 0, the second axis 214 does not meet the requirements of the glass surface spiral design; replacing the second axis 214 with the initial axis 203 in the step S1 and executing the step S1 until the obtained axis meets the design requirement of the glass spiral, obtaining the final axis 215; otherwise, the second axis 214 is the final axis 215.
Step S7: calculating the pitch of the glass surface spiral line, wherein the specific calculation steps of the spiral line pitch are as follows:
projecting the upper and lower endpoints of the first projection line 206 onto the second axis 214 to form corresponding projection points; projecting the upper end point and the lower end point of the second projection line 207 onto the second axis 214 to form corresponding projection points; specifically, the distance L1 between the upper end point and the lower end point of the first projection line 206 and the projection point, and the angle a1 between the upper end point and the lower end point of the first projection line 206 and the projection point are measured; calculating the distance L2 between the upper end point and the lower end point of the second projection line 207 and the projection point, and the angle A2 between the upper end point and the lower end point of the second projection line 207 and the projection point; and calculating the pitch of the glass surface spiral line by the formula pitch P-L-360/A.
Step S8: based on the pitch of the glass face spiral calculated in step S7 and the final axis 215, a door glass face front spiral 217 and a rear spiral 218 are drawn, respectively.
In this embodiment, the preset value is less than 0.05mm, such as 0.01 mm.
As shown in fig. 4 to 5, the engineering glass surface 109 can be obtained through the final axis 215, the front spiral line 217 and the rear spiral line 218 of the glass, and the distance between the engineering glass surface 109 and the outer modeling glass surface 101 is measured, so that the deviation is less than 0.01mm, while the deviation value of the design method of the glass surface in the prior art is 0.1mm, and therefore, the design precision can be improved by 90%.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A design method of a double-curved-surface door glass spiral line of an automobile is characterized by comprising the following steps:
step S1: extracting a front boundary line and a rear boundary line of the outer modeling glass surface, respectively fitting the front boundary line and the rear boundary line into a front circle and a rear circle, and connecting the centers of the front circle and the rear circle to obtain an initial axis;
step S2: acquiring an unfolded surface of an external modeling glass surface, projecting a first boundary line and a second boundary line, which are arranged in front and at the back of the external modeling glass surface, onto the unfolded surface respectively to acquire a first projection line and a second projection line, and then stretching the first projection line and the second projection line respectively by taking the initial axis as a direction to acquire a first curved surface and a second curved surface;
step S3: extracting a first upper boundary line and a first lower boundary line of the first curved surface, and respectively sweeping to obtain a third curved surface and a fourth curved surface based on the first upper boundary line and the first lower boundary line by taking the normal direction of the first curved surface as a direction; extending the third curved surface and the fourth curved surface to intersect to obtain a first intersection line;
extracting a second upper boundary line and a second lower boundary line of the second curved surface, and respectively sweeping to obtain a fifth curved surface and a sixth curved surface based on the second upper boundary line and the second lower boundary line by taking the normal direction of the second curved surface as the direction; extending the fifth curved surface and the sixth curved surface to intersect to obtain a second intersection line;
step S4: respectively taking the middle points of the first intersecting line and the second intersecting line, and connecting the middle points to obtain a second axis;
step S5: measuring the distances from the upper end point and the lower end point on the first projection line to a second axis respectively, and calculating a difference value I between the two distances; measuring the distances from the upper end point and the lower end point on the second projection line to a second axis respectively, and calculating a difference value two of the two distances;
step S6: respectively calculating a difference value between the first difference value and a preset value and a difference value between the second difference value and a preset value; if any difference is greater than 0, replacing the second axis with the initial axis in the step S1 and executing the steps S2-S6;
step S7: projecting the upper end point and the lower end point of the first projection line onto the second axis to form corresponding projection points; projecting the upper end point and the lower end point of the second projection line onto the second axis to form corresponding projection points;
calculating the distances between the upper end point and the lower end point of the first projection line and the projection point and the angles between the upper end point and the lower end point of the first projection line and the projection point; calculating the distance between the upper end point and the lower end point of the second projection line and the projection point, and the angle between the upper end point and the lower end point of the second projection line and the projection point;
step S8: and acquiring a front spiral line and a rear spiral line of the car door glass surface based on the second axis.
2. The design method of the automobile hyperboloid door glass spiral line according to claim 1, wherein the preset value is less than 0.05 mm.
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| CN201911107196.3A CN110803002B (en) | 2019-11-13 | 2019-11-13 | Design method of automobile hyperboloid door glass spiral line |
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| CN201911107196.3A CN110803002B (en) | 2019-11-13 | 2019-11-13 | Design method of automobile hyperboloid door glass spiral line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112141242A (en) * | 2020-09-29 | 2020-12-29 | 宝能(广州)汽车研究院有限公司 | Design method of side door glass guide rail of vehicle |
| CN112699510B (en) * | 2021-01-13 | 2022-09-06 | 东风柳州汽车有限公司 | Simulation manufacturing method, device, equipment and storage medium for automobile door glass |
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| DE102007059323A1 (en) * | 2007-12-07 | 2009-06-10 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Curved windscreen for motor vehicle, has outer and inner glass surfaces with wedge angle that is changed from lower edge upto upper edge of field of vision to compensate double images in each point on vertical center line of field of vision |
| FR2945985B1 (en) * | 2009-05-27 | 2011-05-20 | Saint Gobain | GLAZING WITH LOW LEVEL OF DOUBLE IMAGE. |
| CN102251727B (en) * | 2011-04-27 | 2012-10-31 | 上海沿锋汽车科技有限公司 | Method for designing double curved surface vehicle door window glass guide rail for automobile |
| CN104612547B (en) * | 2015-01-08 | 2016-08-24 | 奇瑞汽车股份有限公司 | A kind of lifting glass for vehicle window system |
| CN107650634B (en) * | 2017-08-21 | 2020-08-21 | 中国第一汽车股份有限公司 | Design method of double-curvature glass of automobile door and window |
| CN109677242B (en) * | 2018-12-17 | 2020-08-21 | 威马汽车科技集团有限公司 | Design method of circular ring surface glass window frame guide rail |
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Denomination of invention: A Design Method for the Spiral Line of Automotive Double Curved Door Glass Effective date of registration: 20231019 Granted publication date: 20210326 Pledgee: Industrial Bank Co.,Ltd. Shanghai Changning sub branch Pledgor: SHANGHAI YANFENG AUTOMOTIVE TECHNOLOGY CO.,LTD. Registration number: Y2023310000658 |