CN111572674A - Method for optimizing motion track of vehicle door glass - Google Patents
Method for optimizing motion track of vehicle door glass Download PDFInfo
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- CN111572674A CN111572674A CN202010478659.3A CN202010478659A CN111572674A CN 111572674 A CN111572674 A CN 111572674A CN 202010478659 A CN202010478659 A CN 202010478659A CN 111572674 A CN111572674 A CN 111572674A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
A method for optimizing the motion track of vehicle door glass comprises the following steps: step 1) inputting an external decoration CAS surface and a waist drum surface through modeling, and calculating the radius of a spiral line according to the CAS surface and the waist drum surface; step 2) solving the axis of the spiral line; step 3) calculating the pitch of the spiral line; and 4) manufacturing a spiral line according to the radius, the axis and the pitch of the spiral line. The invention designs the glass movement trajectory line by a two-circle method, thereby ensuring that the transfer amount of the X direction relative to the glass guide rail is less than 0.1mm in the glass movement process, the deviation of the Y direction and the waist drum surface is less than 0.2mm in the glass movement process and the Z direction stroke deviation of the front and rear boundaries of the glass is less than 0.5mm in the glass movement process in the glass lifting process, and avoiding the phenomena of glass jamming and abnormal sound, glass shaking, jamming and the like in the glass lifting process.
Description
Technical Field
The invention relates to the technical field of automobile detection, in particular to a method for optimizing a motion track of door glass.
Background
In the design of passenger cars, the glass surfaces are commonly single curvature glass and double curvature glass. The single curvature glass is a cylindrical glass surface, namely, in the X direction, the section of the glass is a straight line, and only in the Z direction is a regular curve. The double curvature glass surface is divided into a circular ring surface and a waist drum surface. For a single curvature glass surface, the motion of the glass is a combination of rotational and linear motion, i.e., a helical motion. For a double-curvature glass surface, the motion of the glass needs to be defined as spiral motion, and a motion trajectory line is determined by means of a cylindrical surface.
The glass movement trajectory is a key factor influencing the movement performance of the glass, and the glass movement trajectory is the basis for designing a guide rail, and whether the glass can be smoothly lifted or not is reasonably determined. In many vehicles, the problems of abnormal sound, lifting clamping stagnation, incapability of lifting, water cutting sealing, poor water scraping and the like exist in the lifting process of the glass due to unreasonable design of the movement track line of the glass.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a method for optimizing the motion track of vehicle door glass, and solves the problems of abnormal sound, lifting clamping stagnation, incapability of lifting, poor water cutting seal and poor water scraping in the lifting process of the glass due to unreasonable design of the motion track line of the glass in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for optimizing the motion track of vehicle door glass comprises the following steps:
step 1): inputting an external decoration CAS surface and a waist drum surface through modeling, and calculating the radius R of the spiral line by using a two-circle method according to the CAS surface and the waist drum surface;
step 2): calculating the axis of the spiral line;
step 3): calculating the pitch of the spiral line;
step 4): and manufacturing the spiral line according to the radius, the axis and the thread pitch of the spiral line.
Further, in the step 1): inputting the CAS surface of the automobile exterior trim and the waist drum surface of the door glass through modeling, and taking a point respectively from the upper part and the lower part of the rear boundary of the door glass on the CAS surface to form a straight line; stretching a first plane along the Y direction by taking the straight line as a contour, and translating the first plane to the front boundary position of the glass along the horizontal tangent direction to obtain a second plane; then, a first curve and a second curve are obtained by intersecting the first plane and the second plane with the waist drum surface of the vehicle door glass; two fitting circles are respectively made: the first fitting circle passes through two end points and a middle point of the first curve; the second fitting circle passes through two end points and a middle point of the second curve; connecting the circle centers of the first fitting circle and the second fitting circle to obtain a first straight line; then, taking the first straight line as a profile to make a normal plane of the straight line; projecting the first curve onto a normal plane of the first straight line, and then making a third fitting circle through the projection of the two end points and the middle point of the first curve on the normal plane of the first straight line, wherein the third fitting circle passes through the projection of the two end points and the middle point of the first curve on the normal plane of the first straight line; and measuring the radius of the third fitting circle by using a measuring tool, namely the radius R of the spiral line.
Further, in the step 2): connecting the upper end points of the first curve and the second curve to obtain a second straight line, connecting the lower end points of the first curve and the second curve to obtain a third straight line, respectively taking the second straight line and the third straight line as axes, and taking R as a radius to make a cylinder to obtain a first cylinder and a second cylinder, wherein the first cylinder and the second cylinder are intersected to obtain two intersection lines: the waist drum comprises a first intersection line and a second intersection line, wherein the first intersection line falls on the waist drum surface, and the first intersection line is taken as an axis.
Further, in the step 3: respectively projecting two end points of the first curve and the second curve onto the first intersection line, connecting projection points of the two end points of the first curve on the first intersection line to obtain a fourth straight line, connecting projection points of the two end points of the second curve on the first intersection line to obtain a fifth straight line, measuring the distance between the fourth straight line and the fifth straight line as S, wherein the angle between the fourth straight line and the fifth straight line is alpha, and the screw pitch is F = S/alpha x 360 degrees.
Further, in the step 4): and respectively taking the upper end point and the lower end point of the first curve and the second curve as starting points, taking the first intersection line as an axis, and taking F as a screw pitch to form two spiral lines, wherein the two spiral lines are the movement trajectory lines of the vehicle door glass.
According to the invention, a point is respectively taken at the upper part and the lower part of the rear boundary of the front door glass of the CAS surface of the automobile, a straight line is made, a first plane is stretched along the Y direction by taking the straight line as a contour, and the first plane is positioned on the Y direction, so that the distance between the movement trajectory of the glass and the waist drum surface in the Y direction can be ensured; the second plane is selected by adopting the first plane to horizontally move along horizontal cutting, so that the adjustment amount of the movement trajectory line of the car door glass in the X direction is ensured; when the axis is selected, the second straight line and the third straight line are taken as the axes, the R is taken as the radius to make a cylinder, and the first intersecting line falling on the waist drum surface is taken as the axis, so that the curvature radii of the front spiral line and the rear spiral line can be ensured to be equal, and the Z-direction deviation in the glass lifting process is eliminated. The manufacturing process of the spiral line passing through the front door of the invention is obvious, the radiuses of the two spiral lines are equal, the deviation of the glass in the Z direction in the lifting process is very small, and the stability of the glass in the lifting process can be effectively improved, when the movement track of the car door glass is adopted, the deviation of the Y direction and the waist drum surface in the glass movement process is less than 0.2mm, the unsmooth lifting movement and the clamping stagnation in the movement process can be avoided, the stroke deviation (Z direction deviation) of the front and rear boundaries of the glass in the movement process is less than 0.5mm, the stress imbalance of two connection points of the glass and a lifter in the movement process can be avoided, the glass has the tendency of overturning in the lifting process, and the glass shaking or clamping stagnation phenomenon can occur in the lifting process.
Drawings
FIG. 1 is a schematic diagram of a first plane and a second plane on a CAS plane according to the present invention;
FIG. 2 is a schematic diagram of the structure of a first curve and a second curve on a CAS surface according to the present invention;
FIG. 3 is a schematic diagram of the structure of a first fitting circle and a second fitting circle on a CAS surface according to the present invention;
FIG. 4 is a schematic view of a first line on a CAS surface according to the present invention;
FIG. 5 is a schematic diagram of a third fitting circle on the CAS surface according to the present invention;
FIG. 6 is a schematic view of the structure of the first and second cylinders on the CAS surface according to the present invention;
FIG. 7 is a schematic diagram of a first intersection on a CAS surface according to the present invention;
FIG. 8 is a schematic diagram of the structure of the spiral line on the CAS surface in the present invention;
in the figure: 1. CAS surface, 2, waist drum surface, 3, first plane, 4, second plane, 5, first curve, 6, second curve, 7, first fitting circle, 8, second fitting circle, 9, first straight line, 10, third fitting circle, 11, second straight line, 12, third straight line, 13, first cylinder, 14, second cylinder, 15, first intersecting line, 16, second intersecting line.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The method for optimizing the motion trail of the vehicle door glass shown in the figures 1 to 8 comprises the following steps:
step 1): inputting an external decoration CAS surface 1 and a waist drum surface 2 through modeling, and calculating the radius R of a spiral line by using a two-circle method according to the CAS surface 1 and the waist drum surface 2;
step 2): calculating the axis of the spiral line;
step 3): calculating the pitch of the spiral line;
step 4): and manufacturing the spiral line according to the radius, the axis and the thread pitch of the spiral line.
In the step 1): inputting a CAS surface 1 of an automobile exterior trim and a waist drum surface 2 of door glass through modeling, and taking a point respectively from the upper part and the lower part of the rear boundary of the front door glass on the CAS surface 1 to form a straight line; stretching a first plane 3 along the Y direction by taking the straight line as a contour, and translating the first plane 3 to the front boundary position of the glass along the horizontal tangent direction to obtain a second plane 4; then, a first curve 5 and a second curve 6 are obtained by intersecting the first plane 3 and the second plane 4 with the waist drum surface 2 of the vehicle door glass; two fitting circles are respectively made: a first fitting circle 7 and a second fitting circle 8, wherein the first fitting circle 7 passes through two end points and a middle point of the first curve 5; the second fitting circle 8 passes through two end points and a middle point of the second curve 6; connecting the centers of the first fitting circle 7 and the second fitting circle 8 to obtain a first straight line 9; then, the first straight line 9 is taken as a profile to be taken as a normal plane of the straight line; projecting the first curve 5 onto a normal plane of the first straight line 9, and then making a third fitting circle 10 by projecting two end points and a middle point of the first curve 5 onto the normal plane of the first straight line 9, wherein the third fitting circle 10 passes through the projection of the two end points and the middle point of the first curve 5 onto the normal plane of the first straight line 9; measuring the radius of the third fitting circle 10 by using a measuring tool, namely the radius R of the spiral line, and measuring R =1655.72 mm;
in the step 2): connecting the upper end points of the first curve 5 and the second curve 6 to obtain a second straight line 11, connecting the lower end points of the first curve 5 and the second curve 6 to obtain a third straight line 12, respectively taking the second straight line 11 and the third straight line 12 as axes, and taking R as a radius to make a cylinder to obtain a first cylinder 13 and a second cylinder 14, wherein the first cylinder 13 and the second cylinder 14 are intersected to obtain two intersection lines: a first intersection line 15 and a second intersection line 16, the first intersection line 15 falling on the waist drum surface 2, the first intersection line 15 being taken as an axis;
in the step 3): projecting two end points of the first curve 5 and the second curve 6 to the first intersecting line 15 respectively, connecting projection points of the two end points of the first curve 5 on the first intersecting line 15 to obtain a fourth straight line, connecting projection points of the two end points of the second curve 6 on the first intersecting line 15 to obtain a fifth straight line, measuring the distance between the fourth straight line and the fifth straight line as S, measuring the angle between the fourth straight line and the fifth straight line as alpha, and measuring the screw pitch F = S/alpha x 360 degrees;
in the step 4): and respectively taking the upper end point and the lower end point of the first curve 5 and the second curve 6 as starting points, taking the first intersection line 15 as an axis, and taking F as a screw pitch to form two spiral lines, wherein the two spiral lines are the movement trajectory lines of the vehicle door glass.
According to the invention, a point is respectively taken at the upper part and the lower part of the rear boundary of the front door glass of the CAS surface 1 of the automobile to form a straight line, the straight line is taken as a contour to stretch a first plane 3 along the Y direction, and the first plane 3 is positioned in the Y direction, so that the distance between the movement trajectory of the glass and the waist drum surface 2 in the Y direction can be ensured; according to the invention, the second plane 4 is obtained by horizontally cutting and translating the first plane 3, so that the adjustment amount of the movement trajectory line of the car door glass in the X direction is ensured; when the axis is selected, the second straight line 11 and the third straight line 12 are taken as the axes, the R is taken as the radius to make a cylinder, and the first intersecting line 15 falling on the waist drum surface 2 is taken as the axis, so that the curvature radii of the front spiral line and the rear spiral line can be ensured to be equal, and the Z-direction deviation in the glass lifting process is eliminated. The manufacturing process of the spiral line passing through the front door of the invention is obvious, the radiuses of the two spiral lines are equal, the deviation of the glass in the Z direction in the lifting process is very small, and the stability of the glass in the lifting process can be effectively improved, when the movement track of the car door glass is adopted, the deviation of the Y direction and the waist drum surface 2 in the glass movement process is less than 0.2mm, the unsmooth lifting movement and the clamping stagnation in the movement process can be avoided, the stroke deviation (Z direction deviation) of the front and rear boundaries of the glass in the movement process is less than 0.5mm, the stress imbalance of two connection points of the glass and a lifter in the movement process can be avoided, the glass has the tendency of overturning in the lifting process, and the glass shaking or clamping stagnation phenomenon can occur in the lifting process.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. A method for optimizing the motion track of vehicle door glass is characterized by comprising the following steps:
step 1): inputting an external decoration CAS surface (1) and a waist drum surface (2) through modeling, and calculating the radius R of a spiral line according to the CAS surface (1) and the waist drum surface (2);
step 2): calculating the axis of the spiral line;
step 3): calculating the pitch of the spiral line;
step 4): and manufacturing the spiral line according to the radius, the axis and the thread pitch of the spiral line.
2. The method for optimizing the motion trail of the door glass according to claim 1, wherein in the step 1): inputting a CAS surface (1) of an automobile exterior trim and a waist drum surface (2) of door glass through modeling, and taking a point respectively from the upper part and the lower part of the rear boundary of the front door glass on the CAS surface (1) to form a straight line; stretching a first plane (3) along the Y direction by taking the straight line as a contour, and translating the first plane (3) to the position of the front boundary of the glass along the horizontal cutting direction to obtain a second plane (4); then, a first curve (5) and a second curve (6) are obtained by intersecting the first plane (3) and the second plane (4) with the waist drum surface (2) of the car door glass; two fitting circles are respectively made: a first fitting circle (7) and a second fitting circle (8), wherein the first fitting circle (7) passes through two end points and a middle point of the first curve (5); the second fitting circle (8) passes through two end points and a middle point of the second curve (6); connecting the centers of the first fitting circle (7) and the second fitting circle (8) to obtain a first straight line (9); then, the first straight line (9) is taken as a profile to be taken as a normal plane of the straight line; projecting the first curve (5) onto a normal plane of the first straight line (9), and then making a third fitting circle (10) through projections of two end points and a middle point of the first curve (5) on the normal plane of the first straight line (9), wherein the third fitting circle (10) passes through projections of the two end points and the middle point of the first curve (5) on the normal plane of the first straight line (9); and measuring the radius of the third fitting circle (10) by a measuring tool to obtain the radius R of the spiral line.
3. The method for optimizing the motion trail of the door glass according to claim 2, wherein in the step 2): connect the upper end point of first curve (5) and second curve (6) obtains second straight line (11), connect the lower extreme point of first curve (5) and second curve (6) obtains third straight line (12), respectively with second straight line (11) and third straight line (12) are the axis, use R as the radius and do the cylinder, obtain first cylinder (13) and second cylinder (14), first cylinder (13) with second cylinder (14) are crossing and are obtained two intersecting lines: a first intersection line (15) and a second intersection line (16), wherein the first intersection line (15) falls on the waist drum surface (2), and the first intersection line (15) is taken as an axis.
4. The method for optimizing the motion trail of the door glass according to claim 2, wherein in the step 3: respectively projecting two end points of the first curve (5) and the second curve (6) onto the first intersecting line (15), connecting projection points of the two end points of the first curve (5) on the first intersecting line (15) to obtain a fourth straight line, connecting projection points of the two end points of the second curve (6) on the first intersecting line (15) to obtain a fifth straight line, measuring the distance between the fourth straight line and the fifth straight line as S, and measuring the angle between the fourth straight line and the fifth straight line as alpha, wherein the screw pitch is F = S/alpha x 360 degrees.
5. The method for optimizing the motion trail of the door glass according to claim 2, wherein in the step 4): and respectively taking the upper end point and the lower end point of the first curve (5) and the second curve (6) as starting points, taking the first intersection line (15) as an axis, and taking F as a screw pitch to form two spiral lines, wherein the two spiral lines are the motion trajectory lines of the vehicle door glass.
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| CN202010478659.3A CN111572674B (en) | 2020-05-29 | 2020-05-29 | Method for optimizing motion track of vehicle door glass |
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| CN202010478659.3A CN111572674B (en) | 2020-05-29 | 2020-05-29 | Method for optimizing motion track of vehicle door glass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696645A (en) * | 2013-12-23 | 2014-04-02 | 安徽江淮汽车股份有限公司 | Manufacturing method for lifting guide rail of side window glass of automobile |
| CN104802619A (en) * | 2014-01-26 | 2015-07-29 | 北汽福田汽车股份有限公司 | Design method of vehicle door glass |
-
2020
- 2020-05-29 CN CN202010478659.3A patent/CN111572674B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696645A (en) * | 2013-12-23 | 2014-04-02 | 安徽江淮汽车股份有限公司 | Manufacturing method for lifting guide rail of side window glass of automobile |
| CN104802619A (en) * | 2014-01-26 | 2015-07-29 | 北汽福田汽车股份有限公司 | Design method of vehicle door glass |
Non-Patent Citations (2)
| Title |
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| H. Y. CHANG, JI OH SONG: "Glass Drop Design for Automobile Windows Design of Glass Contour, Shape, Drop Motion, and Motion Guidance Systems", 《SAE PAPER》 * |
| 胡广新,王亮: "基于CAD的汽车侧窗玻璃面与导轨导线的设计研究", 《汽车科技》 * |
Cited By (1)
| 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 |
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