Laser Technology in Automobile Industry

With the increase in the production volume of automobiles, in the production of automobile wheels, it is often necessary to mark one or two places on the circumference and end faces of the wheel hubs for marking. When marking, the car wheels are first placed in two horizontal positions. The roller is positioned in the horizontal direction, and a vertically disposed positioning plate is used for positioning the end face. In order to prevent the automobile hub from being misaligned during marking, the pressing of the automobile wheel is manually performed before the marking can be performed. The standard method has more auxiliary time, lower work efficiency, and greater labor intensity for workers. The emergence of laser marking technology quickly solves these problems. Laser marking machines use laser beams to mark permanent surfaces on different materials. The effect of marking is to expose deep substances by evaporation of surface substances, the markings are clear and permanent, and the processing efficiency is high. The fiber laser marking machine has good beam quality, small laser beam, low processing material consumption, small processing heat affected zone, non-contact processing, no damage to the product, no tool wear, good marking quality, computer control, and easy automation.

Laser welding is a process in which a laser is irradiated to a joint of a workpiece to be heated, and the material of the workpiece is bonded to each other to form a permanent connection. Laser welding has the following characteristics: high energy density, small line energy, small thermal deformation, small heat affected zone, large aspect ratio, and strong welding; high-speed joining process without physical contact, which can weld materials and parts that are difficult to weld by conventional methods; It can be made small and small, and the complexity is simple. It is small and large, and it is simple and complicated. It can realize the connection of dissimilar metals. The surface of the weld is well formed, it can be used directly, the weight is light, and the processing and assembly is simple. Currently, gear laser welding equipment faces strict laser protection standards and a highly competitive market environment. The new transmission double gear processing lines of the US, German and Japanese companies all adopt a new laser welding process to meet the demanding labor cost control and welding technical requirements. Internationally, existing gear welding uses electron beam welding and laser welding techniques. Compared with electron beam welding equipment, the same level of laser welding equipment is simple, no vacuum environment, high production efficiency, low processing cost, durability and low maintenance cost.

If the company develops a fully automatic gear laser welding production line, the high-precision machine automatically recognizes the gear type, and the system immediately replaces the corresponding machining program, and can complete the laser welding operation of the six gears and the upstream and downstream operations without manual intervention. . If the company develops and designs a fully automatic gear laser welding flexible fixture, it can strictly protect the gear from the high temperature splash of laser welding, and can also quickly change the gear processing requirements in one minute. If the company develops and designs a fully automatic gear press-fit process with load sensors and displacement sensors, it can precisely control the press-fit quality of the gears. The precision of gear-finished products can reach 0.02mm, and the maximum production efficiency can reach 19 seconds/piece. It is much higher than the international similar equipment for 25 seconds/piece; greatly reducing labor costs and labor intensity, and the number of personnel has been reduced from the previous two to 0.3.

The competition in the driverless field has never been just the car itself. The intensity of competition for parts and peripheral products is not much worse than that of auto OEMs. Lidar is one of the most moxibustive parts. As the most critical technology and key components in unmanned driving, the application of laser radar has greatly reduced the threshold for entry of unmanned vehicles. Some automakers say that with the widespread use of lidar, it will be able to directly drive the revolution in the driverless industry. Lidar is the abbreviation of Light Detection and Ranging. It is a radar system that emits a laser beam to detect the position and velocity of a target. The principle is to use the electromagnetic wave in the optical frequency band to first transmit the detection signal to the target, and then compare the received co-wave signal with the transmitted signal, thereby obtaining the position (distance, azimuth and altitude) of the target, the motion state and the like, thereby realizing the information. Detection, tracking and identification of targets.

Lidar is also a kind of sensor. Other sensors include camera, ultrasonic, infrared, millimeter wave radar, etc. The biggest feature is that it can generate three-dimensional position information, and can quickly determine the position and size of the object. External topography and even materials, while acquiring data and generating accurate digital models. Compared with sensors such as cameras, laser radar can not only generate three-dimensional position models, but also has a longer detection range, higher measurement accuracy, and a more sensitive response speed, which does not affect the ambient light. Therefore, the laser radar is not only equivalent to giving the car a pair of eyes, but also a pair of clairvoyance.

In terms of type, laser radar can be divided into mechanical laser radar, solid state laser radar and hybrid solid state laser radar. Mechanical lidars have the ability to control the angle of laser emission, while solid-states rely on electronic components to control the angle of laser emission. Compared with the traditional mechanical type, the solid-state radar scans a larger range, the response speed is faster, and the cost is also effectively controlled. The hybrid solid-state laser radar takes a compromise route, and the shape is invisible to the rotating parts, and the actual still exists inside. Hybrid solid-state laser radars are the least difficult to mass-produce. In the next few years, most of the laser radars that can be mass-produced are mixed solids.

From the perspective of the number of internal harnesses, Lidar can be divided into single-beam and multi-line laser radar. The traditional single-beam radar scan only produces one scan line at a time, so it generates flat information. Despite this, single-wire radars have a wide range of applications due to their faster measurement speeds, such as topographic mapping.