Exhaust fan, also known as cross-flow fan, centrifugal fan and small fan, is a general air source for blowing or inhaling air. It is usually used to inhale mechanical equipment, so it is also called exhaust fan.
According to the ventilation principle, exhaust fans can be divided into four types: high, medium, low and negative pressure. This series of negative pressure fans are generally designed by CAD/CAM, which has the characteristics of low noise, low power consumption, large air volume, stable operation, long service life and high efficiency, and has automatic shutter opening and closing system to realize waterproof, dustproof and beautiful characteristics. The negative pressure exhaust fan has a wide range of uses: the negative pressure exhaust fan is installed outside the workshop window, and generally chooses the lower outlet to exhaust air and extract odor gas; Basically, it can be used in all places that need ventilation.
A, suitable for workshops with high temperature or odor: such as heat treatment plants, foundries, plastics plants, aluminum profile factories, shoe factories, leather factories, electroplating plants and various chemical plants. B, suitable for employee-intensive enterprises, such as garment factories, various assembly workshops, Internet cafes, etc.
C, it is suitable for ventilation and cooling in horticultural greenhouses and livestock farms.
D, especially suitable for places that need cooling and certain humidity. For example, cotton mills, wool mills, linen mills, weaving mills, chemical fiber mills, warp knitting mills, deformation mills, knitting mills, silk weaving mills, socks factories and other textile mills.
E, suitable for the field of warehousing and logistics.
F, suitable for kitchens and canteens with heavy oil smoke and sultry smell.
Wave soldering is to make the welding surface of the patch panel directly contact with high-temperature liquid tin to achieve the purpose of welding. The high-temperature liquid tin keeps an inclined plane, and a special device makes the liquid tin form a wave-like phenomenon, so it is called "wave soldering", and its main material is a welding rod.
Wave soldering means that molten solder (lead-tin alloy) is sprayed into the solder wave crest required by the design by electric pump or electromagnetic pump, or it can be formed by injecting nitrogen into the solder pool, so that the printed board with pre-installed components can pass through the solder wave crest, and the mechanical and electrical connection between the welding terminals or pins of components and the printed board pads can be welded.
Wave soldering process: insert components into corresponding component holes → precoat flux → preheat (temperature 90- 100℃, length 1- 1.2m) → wave soldering (220-240℃) for cooling → cut off redundant pins → check.
Reflow soldering technology is to re-melt the paste solder pre-distributed on the printed board pad, and realize the mechanical and electrical connection between the soldering terminals or pins of surface assembly components and the printed board pad.
Wave soldering is a new welding technology with the enhancement of people's awareness of environmental protection. Tin-lead alloy was used before, but lead is a heavy metal, which is very harmful to human body. Therefore, lead-free technology is popularized, * Sn-Ag-Cu alloy * and special flux are used, and the welding temperature needs higher preheating temperature.
In most products that do not need miniaturization and high power, TH or hybrid technology circuit boards are still used, such as televisions, home audio-visual equipment and digital set-top boxes, and perforated components are still used, so wave soldering is needed. From the technological point of view, wave soldering machine can only provide a little adjustment of the most basic equipment operation parameters.
Pedicure device is mainly used to cut off redundant pins after welding components. This machine is assembled from parts made by precision technology. The key parts are polished, and the imported bearings have good consistency in assembly and cutting. The blades have the characteristics of fast and stable rotation speed, low noise, high efficiency and convenient operation. The stroke of double guide rails can be adjusted synchronously, and the height of shearing feet can be adjusted at will. "Continuous improvement, continuous effectiveness and customer first" is our quality policy.
Instructions for use:
1. Place the circuit board after the soldering process on the adjusted foot cutter, and insert the guide rail along the inlet of the guide rail.
2. Push the board feed handle to push the substrate forward at a uniform speed.
3. Repeat step 1.2 to cut the welded substrate.
Note: Do not move the base plate too fast, which will directly affect the service life of the blade and even endanger life safety.
note:
1. When the machine is running, it is forbidden to put hands into the machine and children are forbidden to enter the working area of the machine.
This machine must work under the condition of good grounding.
3. When loading and unloading blades or encountering abnormal conditions, please cut off the main power.
In case of power failure, please cut off the main power supply.
5. This machine is not suitable for use in harsh environments such as humidity, flammability, corrosiveness and high dust.
6. Non-professional maintenance personnel should not remove the cover for maintenance by themselves.
7. Don't open the cover when the machine is running.
8. Please follow the instructions strictly, otherwise our factory will not take any responsibility now.
Mounter: Also known as mounter and surface mount system, it is arranged behind the glue dispenser or screen printer in the production line, and it is a device that accurately places surface mount components on PCB pads by moving the mounting head. There are two kinds of manual and automatic.
Automatic mounter is the equipment used to realize high-speed and high-precision automatic mounting of components, and it is the most critical and complicated equipment in the whole SMT production. Mounter is the main equipment of SMT production line. The mounter has developed from the early low-speed mechanical mounter to the high-speed optical centering mounter, and has developed into a multifunctional and flexible connection module.
As a high-tech product, the safe and correct operation of mounter is very important for both machines and people.
The most basic thing to operate the mounter safely is that the operator should have the most accurate judgment and follow the following basic safety rules:
1. Machine operators should be trained in correct methods.
2. Check the machine, replace parts or repair and internal adjustment, and turn off the power supply (the maintenance of the machine must be carried out when panic button is pressed or the power supply is turned off).
3. When "reading coordinates" and adjusting the machine, please make sure that YPU (programming part) is in your hand, so as to stop at any time.
4. Ensure that the "interlocking" safety equipment can effectively stop the machine at any time, and the safety inspection of the machine cannot be skipped or shortened, otherwise personal or machine safety accidents may easily occur.
In the production process, only one operator is allowed to operate one machine.
6. During the operation, ensure that all parts of the body, such as hands and head, are outside the moving range of the machine.
7. The machine must be properly grounded (real grounding, not neutral).
8. Don't use the machine in gas or extremely dirty environment.
note:
A) It is forbidden to operate on the computer without training.
B) When operating the equipment, safety should be the first priority, and the machine operator should operate the machine in strict accordance with the operating specifications, otherwise it may damage the machine or endanger personal safety.
C) Machine operators should be cautious.
Assembly line, also known as assembly line, is an industrial production mode, which means that each production unit only focuses on a certain link to improve work efficiency and output; According to the transportation mode of the assembly line, it can be roughly divided into seven types: belt assembly line, plate chain assembly line, two-speed chain, inserting and arranging assembly line, mesh belt assembly line, hanging assembly line and roller assembly line. Generally, it consists of traction components, bearing components, driving devices, tensioning devices, steering devices and supporting components. The assembly line has high expansibility, and can design delivery capacity, delivery speed, assembly station and auxiliary parts (including quick connectors, fans, lights, sockets, craft kanban, storage platform, 24V power supply, fan batches, etc.). ) production according to requirements, so it is widely welcomed by enterprises; Assembly line is an effective combination of man and machine, which fully embodies the flexibility of equipment. It organically combines the conveying system, traveling fixture, online special plane and testing equipment to meet the conveying requirements of various products. The transmission mode of the transmission line can be synchronous transmission/(forced) or asynchronous transmission/(flexible). According to the choice of configuration, the requirements of assembly and transportation can be realized. Conveying line is indispensable in mass production of enterprises.