Attentive car advocate discovery, the roof of very much now model, had done not have two black fluid sealant, special be in the majority with masses model, not reasonable person begins to tell groovy public again brief matched! The person that knows actually knows, the masses has bit of kid this really, and listen to me to be told slowly!
Roof sealing strip has 3 effect, one is sealed prevent rain, a cover up one's blemishes, solder dot has a mark, still having is diversion.
Began 1996, german masses receives laser beam welding the technology to apply at the join of roof and side wall shell plating above all, the width that reduced welding line, heat affects an area, enhanced automobile body strength, increased welding line sealing; Laser solders to be able to retain mechanical strength already, also receive a mark without bigger solder, sealing is not bad, need not use sealing strip. This also represented the technical progress of automobile manufacturing industry.
Different car stems from cost consideration, manufacturer home can use different roof and both sides frame to solder means, spot welding joins, the solder dot that distributings equably can assure join intensity, but cannot be over hermetically sealed, need sealing strip so; The spot welding that car of current major day department and the roof that Han is a car still are use tradition solders means, be about to use black sealing strip so.
Does cost have why to differ?
It is masses car department not only actually, major moral character is fastened from, still have beautiful He Xuetie the major model of dragon also is to use excuse me to solder technical roof, in own brand, the Rong Wei I6 that steam banner issues on and 6 models of renown the rank of nobility also are to use laser beam welding to receive roof.
On cost, the cost that laser beam welding receives a technology wants the spot welding with common prep above to solder technology, because this is written down in those days laser beam welding once was taken to receive a technology to do when 4 POLO young is publicized sell a site. Current masses model is basic be to use laser beam welding to receive roof, POLO of this price also is laser solders, cannot see roof sealing strip basically on popular model so.
Does intensity have very big difference?
Although solder of laser drill rod compares resistor spot welding really advanced, for instance its control technology should compare resistor spot welding god-given much, but this still does not have the degree that debases action of resistor spot welding. Although solder of laser drill rod can raise the beautiful sex of welding line but the strength that builds to roof does not have particularly great help (this is opposite originally together strength demand is not high) , it just was to realize car coping and topbeam between more close solder.
And the complexity because of the principle, control rises very troublesome, this brings about welding line of solder of laser drill rod to put injury showing hidden from view easily (small air hole) , in respect of the rain that prevent leakage it also must not compare traditional spot welding + sealing strip craft is outstanding.
Actually day fastened a car to also use a lot of particular technologies now, for instance the automobile body of NX just used this Leikesasi a variety of welder that enhance automobile body strength art, so, cannot fasten the roof that used solder of laser drill rod because of masses car, think it is certain arbitrarily intensity passes spot welding technology high.
Summary:
The masses is done not have this really brief match, two balata sealing strip also is not brief the result that match, very glad to see the world's advanced workmanship be rolled out on China earth, hope numerous and homebred car also does not want patronage to wear the thing that does a few face to go up, enhance bodywork intensity, from begin with armor plate of a few galvanization, the homebred car sincerity that punchs a few years with respect to rust loves not to rise!
