阅读说明：本技术 氢能汽车复合材料车身维修的方法 (Method for repairing composite material automobile body of hydrogen energy automobile ) 是由 陈东 郝义国 于 2019-09-17 设计创作，主要内容包括：本发明提供了氢能汽车复合材料车身维修的方法,针对不同的损伤本发明提供了相应的维修方式,注胶法针对的是复合材料的分层或脱胶损伤；外搭接补片法针对的是复合材料的分层、缺口、破孔、断裂等损伤；嵌入式补片法针对的是复合材料的分层、缺口、破孔、断裂且具有维修操作空间的损伤。上述三种方法都采用了微波固化,即通过微波加热固化胶黏剂或者预浸料补片来进行胶结。本发明提供的微波固化维修方法便于操作、加热均匀且很大程度上节约维修成本。(The invention provides a method for maintaining a composite material automobile body of a hydrogen energy automobile, and provides corresponding maintenance modes aiming at different damages, wherein a glue injection method aims at layering or degumming damage of the composite material; the external lapping patch method aims at the damages of the composite material such as layering, gaps, broken holes, fracture and the like; the embedded patching method aims at the damage of the composite material such as layering, gaps, broken holes and fracture and maintenance operation space. The three methods all adopt microwave curing, namely, the adhesive or the prepreg patch is cured by microwave heating for bonding. The microwave curing maintenance method provided by the invention is convenient to operate, uniform in heating and capable of greatly saving maintenance cost.)

1. A method for repairing a composite material automobile body of a hydrogen energy automobile is characterized by comprising the following steps:

s1: cleaning a damaged area on a vehicle body;

s2: injecting microwave adhesive into the damaged area for the delamination degumming and the degumming area to glue the damaged area; for the damaged areas of layering, gaps, broken holes and fracture, firstly, manufacturing a composite laminated plate with the area larger than that of the damaged area, then covering the composite laminated plate on the surface of the damaged area, and cementing by using a microwave adhesive; for the damage of layering, gaps, broken holes and fracture and having a maintenance operation space, firstly digging out a damaged area to form a slope or a step, and then cementing the cut prepreg patch in the shape of the slope or the step in the damaged area;

s3: and heating and curing the microwave adhesive or the prepreg patch by adopting portable handheld microwave equipment.

2. The method for repairing a composite body of a hydrogen automobile according to claim 1, wherein the microwave frequency of the portable handheld microwave device is 2.45GHz, and the microwave heating power is 200W.

3. The method for repairing a hydrogen energy automobile composite material automobile body according to claim 1, wherein the heating curing time of the microwave adhesive is 4 minutes.

4. The method of hydrogen energy automotive composite body repair according to claim 1, characterized in that the prepreg patch has a heat cure time of 10 minutes.

5. The method for repairing the composite body of the hydrogen automobile according to claim 1, wherein the microwave adhesive and the prepreg patch are both made of epoxy resin.

Technical Field

The invention relates to the field of automobile maintenance, in particular to a method for maintaining a composite material automobile body of a hydrogen energy automobile.

Background

With the popularization of automobiles, people pay more and more attention to the selection of car body materials with light weight and high strength, and composite materials (carbon fiber composite materials or glass fiber composite materials) are one of the car body materials. When the automobile body has an automobile body collision accident, the automobile body is locally damaged in the forms of layering, gaps, broken holes, fracture, degumming in a cementing area and the like, and the damage needs to be repaired in order to improve the safety of the automobile. The traditional plate materials can be repaired by a 'smashing and pulling welding repair' method, and the composite materials have low ductility and can be usually repaired only by local or whole replacement, so that the repair cost is greatly increased. Meanwhile, the traditional adhesive and prepreg are heated and cured, and heat is conducted from outside to inside, so that a temperature gradient is formed in the material, thermal stress is easily generated, and the bonding quality is influenced; meanwhile, the curing time is long, and the energy consumption is large.

Disclosure of Invention

In view of the above, the invention provides a composite material vehicle body maintenance method which is low in cost, simple to operate and uniform in heating.

The invention provides a method for maintaining a composite material automobile body of a hydrogen energy automobile, which is characterized by comprising the following steps of:

s1: cleaning a damaged area on a vehicle body;

s2: injecting microwave adhesive into the damaged area for the delamination degumming and the degumming area to glue the damaged area; for the damaged areas of layering, gaps, broken holes and fracture, firstly, manufacturing a composite laminated plate with the area larger than that of the damaged area, then covering the composite laminated plate on the surface of the damaged area, and cementing by using a microwave adhesive; for the damage of layering, gaps, broken holes and fracture and having a maintenance operation space, firstly digging out a damaged area to form a slope or a step, and then cementing the cut prepreg patch in the shape of the slope or the step in the damaged area;

s3: and heating and curing the microwave adhesive or the prepreg patch by adopting portable handheld microwave equipment.

Preferably, the microwave frequency of the portable handheld microwave device is 2.45GHz, and the microwave heating power is 200W.

Preferably, the heating curing time of the microwave adhesive is 4 minutes.

Preferably, the prepreg patch has a heat cure time of 10 minutes.

Preferably, the microwave adhesive and the prepreg patch are both made of epoxy resin.

The technical scheme provided by the invention has the beneficial effects that: compared with heating and curing, the method can realize uniform heating and has short heating time; meanwhile, the replacement requirement of the traditional composite material vehicle body maintenance is reduced, and the maintenance cost is reduced.

Drawings

FIG. 1 is a schematic diagram of an external lapping and patching method in a method for repairing a composite material body of a hydrogen energy automobile;

FIG. 2 is a schematic diagram of an embedded patch method in the method for repairing the composite material body of the hydrogen energy automobile;

fig. 3 is a schematic view of a portable hand-held microwave device curing prepreg patches in accordance with the present invention.

Reference numerals: 1-damaged structure a; 2-laminate patch; 3-glue layer; 4-damaged structure B; 5-prepreg patch; 6-portable handheld microwave device; 7-a microwave applicator; 8-prepreg patch; 9-injury site.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

The embodiment of the invention provides a method for repairing a composite material automobile body of a hydrogen energy automobile, which comprises the following steps:

the layered degumming and the degumming area of the composite material vehicle body are maintained, and the specific maintenance steps are as follows:

s101: cleaning the regions subjected to layered degumming or degumming in the gluing area by using clean rags or sand paper;

s102: injecting microwave adhesive into the degumming area of the layering or cementing area;

s103: and (3) heating and curing the place where the microwave adhesive is injected by using the portable handheld microwave equipment 6 for 4 minutes.

As shown in fig. 1 and 3, the method for repairing the damage of the composite material car body such as delamination, notch, hole breaking, fracture and the like comprises the following specific steps:

s201: cleaning the surface of the damaged structure a1 with a clean rag or sandpaper;

s202: gluing the composite material laminated plate patch 2 which is the same as the repaired part with the damaged structure A1 through microwave adhesive to form a glue layer 3;

s203: and heating and curing the adhesive layer 3 by using a portable handheld microwave device 6 for 4 minutes.

As shown in fig. 2 and 3, the damage of the delamination, the gap, the hole breaking, the fracture and the maintenance operation space is maintained, and the specific maintenance steps are as follows:

s301: cleaning the surface of the damaged structure B4 with a clean rag or sandpaper;

s302: digging out the damaged part of the damaged structure B4 to form a slope or step-shaped damaged part 9, and then cementing the cut slope or step-shaped prepreg patch 5 with the damaged part 9;

s303: parameters are set by a portable handheld microwave device 6, and the prepreg patch 5 is heated and cured by a microwave applicator 7 for 10 minutes.

The three maintenance modes all adopt a microwave heating curing method, the microwave frequency of the handheld microwave equipment 6 is 2.45GHz, the microwave heating power is 200W, and the microwave adhesive and the prepreg patch adopted in the maintenance step are both made of epoxy resin. Compared with the traditional heating curing, the microwave curing can realize uniform heating and rapid curing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.