Method for determining safety handling time of cars and car production method

A safety processing and predetermined time technology, applied in the field of determining the safety processing time of vehicles, can solve the problem of inability to accurately determine the safety processing time

Active Publication Date: 2017-10-24
SIKA (CHINA) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention can solve the problem that the prior art cannot accurately determine the safe processing time, and provides a method for determining the safe processing time of a vehicle and a vehicle production method

Method used

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  • Method for determining safety handling time of cars and car production method
  • Method for determining safety handling time of cars and car production method
  • Method for determining safety handling time of cars and car production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a method for determining the safe processing time of a vehicle, wherein the vehicle includes a window (or glass) that is bonded to the car body by an adhesive, and the safe processing time of any stage is from the bonding of the window Methods for determining the safe handling time of a vehicle from the time on the vehicle body to when the phase can begin include:

[0033] Calculate the maximum shear stress τ and maximum tensile stress σ of the window at the first stage according to the following formula: τ=m 1 (1+f 2 )×g×f 1 / (L×w×f 3 ), σ=m z ×g×f 1 / (L×w×f 3 ), where L is the perimeter of the window, w is the width of the bonding area of ​​the window, m 1 is the mass of the window, m z is the equivalent mass causing the shear stress, g is the acceleration due to gravity, f 1 , f 2 , f 3 is the preset coefficient, f 1 ≥1, f 2 ≥0,0﹤f 3 <1;

[0034] The safe processing time of this stage is determined according to τ, σ and the pres...

Embodiment 2

[0037] This embodiment provides a method for determining the safe processing time of a vehicle.

[0038] Among them, some windows in the vehicle are bonded to the vehicle body by adhesive, and after the window is bonded to the vehicle body, the vehicle goes through other production stages. From the time the window is bonded to the car body, at least a certain amount of time must pass to ensure that the window has sufficient bond strength before each other stage can begin, and this time is the safe processing time for that stage .

[0039] Specifically, the above methods for determining the safe processing time of the vehicle include:

[0040] S11. Determine the safe processing time of the first stage of removing the adhesive fixture.

[0041] When the window is just bonded to the car body, the bonding strength is very low, so it needs to be temporarily fixed with a bonding fixture. Only when the bonding strength is sufficient can the bonding fixture be removed. The determinati...

Embodiment 3

[0117] This embodiment provides a method for producing a vehicle, wherein the vehicle includes a window bonded to the vehicle body by an adhesive,

[0118] In the vehicle production process, at least the safety processing time of this stage must pass before starting a stage, and the safety processing time is determined by the above-mentioned method.

[0119] That is to say, in the vehicle production process of this embodiment, after the window is bonded to the vehicle body, the subsequent process can only start after a corresponding safety treatment time. The security processing time of a stage must wait until the security processing time is reached before starting the next stage, and the security processing time of each stage is calculated according to the above method.

[0120] In the vehicle production method of this embodiment, the safety processing time is calculated according to the above method, so the safety processing time is the most accurate, which can ensure that t...

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Abstract

The invention provides a method for determining safety handling time of cars and a car production method and belongs to the technical field of car window bonding, aiming to overcome the failure in determining the safety handling time of the cars in the prior art. The car comprises a window bonded to a car body through a binder. The first stage of the safety handling time refers to the time from bonding the window to the car body until the beginning of the stage. The method includes calculating the maximum shear stress tau and the maximum tensile stress sigma of the window at the first stage according to the formula: tau=m<1>(1+f<2>)*g*f<1> / (L*w*f<3>), sigma=m<z>*g*f<1> / (L*w*f<3>), wherein L is the window circumference, w is the width of the window bonding region, m<1> is the window mass, and m<z> is the equivalent mass causing shear stress; determining the safety handling time of the stage according to tau and sigma and the preset bonding strength table, wherein the bonding strength table refers to a corresponding relationship table about curing time, shear strength and tensile strength of the binder on current conditions, the safety handling time refers to the minimum curing time, which allows the shear strength and the tensile strength respectively to be greater than or equal to the tau and the sigma, of the bonding strength table.

Description

technical field [0001] The invention belongs to the technical field of vehicle window bonding, and in particular relates to a method for determining the safe processing time of a vehicle and a vehicle production method. Background technique [0002] Parts of the vehicle's windows (or glass) are bonded to the body with adhesives, and the vehicle goes through multiple production stages after the windows are bonded. For example, when the window is bonded to the car body, the bonding strength is very low, and it needs to be fixed by a bonding fixture. After a certain period of time, the bonding fixture can be removed and enter subsequent production. After the subsequent production is completed, the vehicle will be tested. Drive on the road for a road test. [0003] Obviously, problems such as falling and loose windows are not allowed in vehicle production. However, the bonding strength of the adhesive increases gradually with time, and it takes a long time to fully cure (the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D65/00B62D65/06
CPCB62D65/005B62D65/06
Inventor 王鹏飞
Owner SIKA (CHINA) LTD
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