Generally speaking, LED placement machines are a type of surface mount technology (SMT) placement machines. With the development of LED technology, traditional SMT placement machines can no longer meet the production needs of the LED industry. At this time, LED The placement machine came into being.
LED placement machine is an SMT placement equipment specially designed for the LED industry to achieve mass LED circuit board assembly. The equipment does not require high precision, but requires high speed. The LED special placement machine reduces the cost of placement equipment and improves production efficiency. At present, there are many types of LED placement machines, but whether it is a fully automatic high-speed placement machine or a manual low-speed placement machine, their overall layout is similar.
Automatic LED placement machine is a computer-controlled high-precision automation equipment that integrates optical, mechanical, and electrical. It consists of a rack, PCB transfer mechanism and carrying organization, drive and servo positioning system, placement head, and feeder , Optical recognition system, sensor and computer control system, which through some functions such as absorption-displacement-positioning-placement, complete the fast and accurate placement of SMD on the PCB board.
The difference between LED placement machine and traditional placement machine
LED placement machine mainly needs to meet the lamp bead placement accuracy requirements of 3014, 2835, 3528 and 5050, 5630, 5730. Compared with the processing accuracy of traditional placement machines, the requirements for LED placement machines are relatively low. However, the LED placement machine pays more attention to performance, that is, the stability, speed, operability, and size requirements of the machine. Therefore, the LED placement machine must have the following design ideas and rigid requirements.
1) Intelligent methods are more maturely applied to LED special placement machines. Various types of sensors with excellent performance can fully collect data for computer disposal during operations, ensuring the stability and reliability of the entire placement process . At the same time, like other equipment, it is necessary to regularly maintain the LED placement machine according to scientific methods and technical specifications, such as cleaning and washing the surface of the machine and circuit board, which can effectively prevent poor heat dissipation inside the machine due to dust and fouling. Cause overheating and burn out the device. The LED placement machine has good stability in order to maximize the efficiency for the enterprise and reduce the production cost.
2) The speed of the LED placement machine must be fast, with a minimum placement speed of over 18 000 dots/h.
3) A simple, easy-to-learn and user-friendly operation method can greatly shorten the training time of personnel, and effectively reduce misoperation in the production process, and improve production efficiency and product quality.
4) The LED placement machine must be able to mount a PCB with a length of 1200 mm at least, because a large part of the LED is to replace the traditional light tube lighting, so the length will greatly exceed the traditional PCB size. In addition to these, in order to ensure that a single LED light board has no color difference, the entire batch of LED light beads to be mounted is required to have the same color temperature BIN (BIN generally represents the range of some parameters of the LED light beads, and different ranges can be used differently. The number indicates that these parameters include voltage, color temperature, brightness, etc., so there are such expressions as voltage BIN, color temperature BIN, and brightness BIN. BIN can be used to represent the product model).
Development status of domestic LED placement machine technology
As the huge market potential of the fourth-generation light source, coupled with the strong support of government policies, the domestic LED lighting industry has almost developed by leaps and bounds. From the popularity of the early LED display to the current transition to LED commercial lighting, indoor lighting, outdoor lighting, lighting engineering, etc., LED products have realized the transition from a single popular product to the application and popularization of LEDs in all fields.
The development of LED has driven the popularity of related equipment industries. Reflow soldering, wave soldering, printing machines, LED placement machines, and LED packaging equipment have developed rapidly. At present, most of the domestic LED equipment are small mounters that can mount 1.2 m light boards. Basically, they use a platform-type motion structure, combined with a double swing arm motion method, to achieve LED mounting.
At present, the domestic LED placement machine technology is still in its infancy. The products developed can only meet the early needs of some small and medium-sized enterprises. my country is a big electronics manufacturing country, and it needs different grades of domestic LED placement machines. Therefore, the model must be selected according to the actual situation, to reduce the difficulty in the development of domestic LED placement machines, and quickly enter the electronic equipment industry.
