What does “body in white” mean in automotive design? أداة الاختبار –

What does “body in white” mean in automotive design?

First of all, we must have a conceptual understanding of the body in white. Usually what we call Body In White is Body In White, which is often abbreviated to BIW. This concerns the entire body structure excluding trim parts. This corresponds to the concept of door in white, namely Door In White, often abbreviated to DIW.

Second, we must have a functional understanding of the white car door. If divided in terms of function, it can be divided into three categories: basic (body) parts, functional parts and decorative parts. Compared to the entire automobile system, its basic element is the body in white. Compared to the door system, its basic element is the white door. The basic functions of the white body (or the white car door) are two: one consistsyou to support and protect, and the other to install. The body in white can be understood as the skeleton of a car. It not only supports the car body to maintain its shape, but must also have sufficient strength and rigidity to withstand vibrations and loads from the road surface and other systems. Additionally, it also serves as a support for other system installations. At the same time, it also plays a protective role in collisions, rollovers and other accidents. From a protection perspective alone, I think the generalized body in white can be understood as a spatial topological structure. It can effectively guide and control force transfer through its own deformation or arrangement during a collision or rollover. In a frontal collision, the front cabin must absorb the energy through its own collapse deformation during the collision, reduce thedeformation of the passenger compartment and ensure the living space required by the occupants. For side collisions and rollovers, since the space available for collapse is very small, the passenger compartment and doors must have high strength and rigidity.

China has now made significant progress in the development of the body in white. We cannot say that she is an international leader, but at least she is not much worse in the conventional domain of the body in white. Of course, major foreign manufacturers are now developing bodies made of aluminum alloy (like Audi\'s ASF), composite materials (like the carbon fiber body of the BMW i, etc.), and China has still some delay in this regard. Of course, this is all just a story for later.

Here we will develop the stamping and forming steps of various parts of the car.

The stamping AndThe forming of various parts parts of the car body is to make the body blank. The first step, taking the car door as an example, the processing steps are as follows:

1. Cutting

Cut the raw material to the corresponding size according to the required processing. Small and large pieces

2. Stamping

Send the cut parts into the stamping machine and attach them to the designated station. Below the material is a stamping die, and the press above applies downward pressure to make the sheet metal fit the die to form the desired shape, and finally the press leaves the surface of the material, removes the mold and sends the formed material to the next process.

3. Welding

The interior door panel is usually divided into two parts, and the two parts are connected to each other by welding.

Stamping isa metal processing method that uses various molds and processing methods such as shearing, bending, forming and extending to obtain parts of different sizes and structures. Everything from instrument parts to automobile beams is processed by stamping. And by controlling the size and roughness of the mold, micron precision parts and parts with complex shapes can be processed. The main advantages of stamping parts are:

1. The product is of uniform thickness, light and very resistant.

2. The operation of the assembly line is simple and fast, the production cycle is fast, and it is suitable for mass production. This can be achieved using multi-tool continuous molds and can produce hundreds of parts per minute.

3. It can make parts with ribs, ribs or flanges that are difficult to make by other techniques oftreatment. 4. High production efficiency, high material utilization, good shear and recyclability. The disadvantage is that it is difficult to change the mold once it is made. For example, the overall mold of the body side panel is extremely expensive, and the characteristics of the side panels of each car are different. The mold must be reopened each time. If the design is changed after the mold is opened, the original mold cannot be scrapped, resulting in a loss of millions of dollars.

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