Device and method for controlling glue joint curing deformation of dissimilar material

A technology of curing deformation and dissimilar materials, applied in the bonding method of adhesive heating, temperature control without auxiliary power supply, etc. High adaptability, avoid large deformation effect

Active Publication Date: 2012-03-28
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not only costly, but also cannot fundamentally solve the problem of different thermal expansion of the two plates
[0005] Summarizing the above aspects, it can be concluded that the main problem of curing deformation of dissimilar materials is that the overall high-temperature curing is inevitable: the use of low-temperature curing adhesives reduces the strength of the adhesive connection, and the use of adhesives needs to be increased to meet the strength requirements of the body connection. High; external rigid constraints can reduce deformation, but cannot eliminate deformation, and will form a large internal stress inside the part
Therefore, the problem of large deformation of dissimilar materials has become a huge obstacle affecting the development of multi-material lightweight car bodies, which needs to be solved urgently

Method used

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  • Device and method for controlling glue joint curing deformation of dissimilar material
  • Device and method for controlling glue joint curing deformation of dissimilar material
  • Device and method for controlling glue joint curing deformation of dissimilar material

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Experimental program
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Embodiment 1

[0028] Such as figure 1 As shown, this embodiment includes: heating and cooling mold 1, high expansion rate part 2, adhesive layer 3, low expansion rate part 4, heat insulation accessory 5, and heating mold 6, including: heating mold 6, low expansion rate part 4. The adhesive layer 3 and the thermal insulation accessories 5, the high expansion rate parts 2 and the heating and cooling mold 1 are stacked in sequence, and the thermal insulation accessories 5 and the adhesive layer 3 are located on the same plane; the low expansion rate parts 4 are The thermal expansion coefficient of low carbon steel is smaller than that of the high expansion rate part 2 aluminum alloy.

[0029] According to the coolant temperature estimation method, the thermal expansion coefficient of aluminum alloy is 23.6e -6 , Low carbon steel thermal expansion coefficient 11.3e -6 ~13.5e -6 , The heating temperature is 180°C according to the requirements of the adhesive selection, and the room temperature is 2...

Embodiment 2

[0037] In this embodiment, the low expansion rate part 4 is aluminum alloy, and its thermal expansion coefficient is 23.6e -6 , The high expansion rate part 2 is magnesium alloy, and its thermal expansion coefficient is 27.0e -6 . The coefficient of thermal expansion of low-expansion parts is smaller than that of high-expansion parts.

[0038] The heating temperature is selected at 80°C according to the requirements of the adhesive, and the room temperature is 20°C. The corresponding magnesium alloy plate temperature needs to be controlled at about 72°C. Since the temperature difference is not large, the cooling method can be air-cooled. Therefore, the heating and cooling mold 1 is omitted.

[0039] In this embodiment, the cooling temperature step is 1°C, the time step is 1 second, the heating time is 1800 seconds, and the corresponding cooling temperature is set to 73°C.

[0040] The specific form of the heating mold 6 is figure 2 As shown, the resistance wire heating method is s...

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Abstract

The invention relates to a device and method for controlling the glue joint curing deformation of a dissimilar material in the technical field of automobile manufacturing. The method comprises the following steps of: independently controlling metal curing temperatures of parts to be cured at both sides of an adhesive by heating and cooling dies of which the shapes are matched with the shapes of the parts; determining a temperature control strategy of the dies at both sides according to the material properties of the parts to be cured and the adhesive; and clamping the dies and the parts to becured and carrying out dynamic control on the temperature variation of the dies at both sides so as to realize asymmetrical curing of an adhesive layer. According to the invention, the materials at both sides of the adhesive are kept to have the same thermal expansion capacity in the whole adhesive curing process and the directional curing from the high temperature side to the low temperature side of the adhesive layer is realized by utilizing the thermal insulation characteristic of the adhesive and changing the temperature distribution in two plates, so that the aims of controlling and eliminating the gluing deformation are fulfilled.

Description

Technical field [0001] The invention relates to a method and a device in the technical field of automobile manufacturing, in particular to a method and a device for controlling the deformation of bonding and curing of dissimilar materials. Background technique [0002] The pressure of soaring oil prices and environmental protection requirements put forward new requirements for lightweight body. Lightweight alloys such as magnesium, aluminum alloys and composite materials are gradually being used in large quantities in car bodies with their low density and high specific strength. However, advanced high-strength steel and ultra-high-strength steel will still account for a large proportion of the body structure due to its excellent mechanical properties and relatively low price advantages. Therefore, the connection of dissimilar materials will be a problem that car body manufacturing must face in the future. Because the physical properties of dissimilar materials vary greatly, tra...

Claims

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Application Information

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IPC IPC(8): C09J5/06G05D23/02
Inventor 李永兵林忠钦朱晓搏王培中来新民陈关龙
Owner SHANGHAI JIAO TONG UNIV
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