Door structure.
The door of a car consists of a door plate, a door inner plate, a door window frame, a door glass guide, a door hinge, a door lock and door and window accessories. The inner plate is equipped with glass lifters, door locks and other accessories, in order to assemble firmly, the inner plate should be strengthened. In order to enhance safety, an anti-collision rod is generally installed inside the outer plate. The inner plate and the outer plate are combined by flanging, bonding, seam welding, etc., in view of the different bearing capacity, the outer plate is required to be light in weight and the inner plate is strong in rigidity and can withstand greater impact force.
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For the car, the quality of the door is directly related to the comfort and safety of the vehicle. If the quality of the door is poor, the manufacturing is rough, and the material is thin, it will increase the noise and vibration in the car, and make the occupants feel uncomfortable and unsafe. Therefore, in the process of purchasing a car, special attention should be paid to the manufacturing quality of the door.
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The door can be divided into the following types according to its opening mode:
Cis door: Even when the car is running, it can still be closed by the pressure of the air flow, which is safer, and it is easy for the driver to observe backwards when reversing, so it is widely used.
Reverse open door: when the car is driving, if it is not tightly closed, it may be driven by the oncoming air flow, so it is used less, and it is generally only used in order to improve the convenience of getting on and off the bus and suitable for the case of welcoming etiquette.
Horizontal mobile door: its advantage is that it can still be fully opened when the distance between the side wall of the body and the obstacle is small.
Upper hatchdoor: Widely used as the rear door of cars and light buses, but also used in low cars.
Folding door: It is widely used in large and medium-sized buses.
The car door is generally composed of three parts: the door body, the door accessories and the interior cover plate.
The door body comprises a door inner plate, a car outside the door plate, a door window frame, a door strengthening beam and a door strengthening plate.
Door accessories include door hinges, door opening stoppers, door lock mechanisms and internal and external handles, door glass, glass lifters and seals.
The interior cover plate comprises a fixing plate, a core plate, an interior skin and an inner handrail.
Doors can be divided into the following types according to their production process:
Integral door
The inner and outer plates are made of the whole steel plate after stamping. The initial mold investment cost of this production method is relatively large, but the relevant gage fixtures can be reduced accordingly, and the material utilization rate is low.
Split door
The door frame assembly and the door inner and outer plate assembly are welded, and the door frame assembly can be produced by rolling, which has lower cost, higher productivity, and lower overall corresponding mold cost, but the later inspection fixture cost is higher, and the process reliability is poor.
The difference between the integral door and the split door in the overall cost is not very large, mainly according to the relevant modeling requirements to determine the relevant structural form. Due to the current high requirements of automobile modeling and production efficiency, the overall structure of the door tends to be split.
Inspection of new car doors
The inspection of the door of the new car, we must first observe whether the border of the door of the new car has small ripples, and then check whether the A pillar, B pillar, C pillar of the new car has a problem, but also check whether the prism of the new car frame has corrosion, here is a very easy place to go wrong, because many people open the door, will accidentally hit the obstacles around the body, so it will cause the paint of the prism rust. The inspection of the door of the new car, in the new car inspection to pay more attention to observe the prism of the new car door inspection although not as important as the inspection of the car transmission, but can not be ignored, after all, if the door of the new car is not well sealed, resulting in water leakage when it rains, or if it has been an accident car, it is not very depressed. Inspection when the door of the new car is closed: Observe whether the gap on both sides of the door of the new car is smooth, smooth, uniform in size, and whether the close fit is on the same level, because if the door is installed with problems, it is possible that the door is higher or lower than the other side of the door. In addition to looking carefully, this step also needs to be touched by hand. Second, the inspection when the new car door is opened: Observe whether the rubber strip on the new car door and the A-pillar and B-pillar of the new car is normal, because if the rubber strip is installed incorrectly, the repeated closure and extrusion of the door will cause the deformation of the rubber strip on both sides. In this way, the tightness of the new car will not be too good, and it may cause water to be poured into the new car when it rains. Third, the inspection of the door of the new car should also carefully check whether the parts inside the A-pillar of the new car are painted normally and whether the screws are firm. Not only the screws here, in fact, the screws in each position of the new car should be carefully checked. 4. Switch each door several times, feel whether the switching process is smooth and natural, and whether there is an abnormal sound. Friendly tip: When the inspection operation of the new car door, we must repeatedly go back and forth, multi-directional observation, hands-on, so as to find the problem. New car inspection must not be afraid of trouble, and the inspection of the new car door can not only be reflected in a door, to the four new car doors are seriously done, so as to ensure the quality to the greatest extent.
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