Application of friction transmission line in automobile production line.
Friction transmission line (hereinafter referred to as friction line) has become a new generation of mechanized transmission equipment with the advantages of simple structure, stable operation, convenient maintenance, energy saving, low noise and no oil pollution. At present, several domestic equipment manufacturers have mastered this technology, and began to be widely promoted and applied in domestic automobile production lines.
1. Application scope of friction line in automobile production line
At present, the main application scope of the friction line in the automobile production line is as follows: the transportation and storage of the welded-body in white to the painting workshop (hereinafter referred to as the welded-PBS line), the pre-painting line, the PVC coating line, the wax spraying line, and the transportation and storage line to the final assembly paint body (hereinafter referred to as the final assembly WBS line); Final assembly chassis assembly line; Car door loading line, etc.
2, the specific structure of the friction line
At present, there are two main types of friction line feeding structure, namely ground friction line and air suspension friction line.
The friction line is mainly composed of track, turnout, friction drive device, stop device, positioning device, train group, detection device, stop device, positioning device, train group, detection device, air route system and electric control system. Different types of friction lines are adopted according to different conveying requirements of automobile production process. The track type of friction conveyor has two types at present, one for H type steel processing, the other for double channel steel, using bracket welding processing.
3. Working principle of friction line
A complete set of friction conveying equipment is composed of track, turnout, cooling drive device, stop device, positioning device, train set, detection device, air route system and electric control system and other components. The process function is to send the body material from one station (workshop) to another station (workshop) through the vehicle group, so as to realize the material transportation of the body (or body assembly parts) of the automobile production line. The running power of the vehicle group comes from several small driving stations installed next to the online body. An independent driving unit consists of a friction wheel, an unpowered auxiliary wheel and a driving motor. Friction wheel, turning drive motor to drive the friction wheel and auxiliary wheel through the spring will transport car beam clamped in the middle, the side of the friction wheel adopts the special material - pu, the material and delivery the car beam profile has a lot of friction coefficient, when the friction wheel rotation, conveying the car is under the drive of the side friction force to move forward, Along the whole track of the friction line, a small driving station is distributed at a fixed distance. One driving station transmits the trolley to the next driving station. Constantly pass it on to achieve by this body material (workshop) from one location to another location (workshop) for the purpose of friction line of every station motor power is very small is in commonly 120 w to 180 w, and decentralized centralized control through the drive system, implement the drive motor car comes only will rotate, when open the high transmission car drivers ", the drive motor will stop spinning, which can greatly save energy and equipment life. A conveyor line with a conventional push rod chain is used
Compared with a high-power drive for a long time to drive the chain, the friction line has the effect of saving energy. In addition, the working principle of the line, you can see that the operation of the transport car power source is to rely on each driving wheel drive stand with delivery car beam friction thrust, as there is no power driven friction wheel and auxiliary wheel are all made of pu material, so the line in the process of driving the car running low noise and no pollution, which is also putting chains do not
To the. In addition, because the line drive is distributed layout, the control is relatively simple; The heel of individual driver will not affect the operation of the whole line of equipment. It is convenient to maintain and maintain at ordinary times, and the equipment runs stably
4. System control principle of friction line
The friction line is like the length of the line, the auxiliary line is complex, the system control generally adopts PLC partitioned centralized control, the field uses PROFIBUS-DP bus communication and remote /O module, and the installation of Ethernet communication module, to realize the communication between each partition and the upper computer, through the upper computer can realize the auxiliary line timely monitoring and related production adjustment.
5, the characteristics of the friction line
The friction line is mainly characterized by energy conservation and environmental protection, convenient maintenance, flexible transmission speed control, simple structure, high cost performance and wide range of use. Especially in today's environment of energy conservation and environmental protection, friction transmission line has a huge application space and development prospects
