Shen Hong: Engaged in electrical processing technology and machine tool research and development for 37 years. As an expert with outstanding contributions in the industry, he enjoys special allowance from the State Council.
Electric discharge machining (EDM) is an alternative in metal processing, and it is usually enough to have more than a dozen units in a professional mold factory. Recently, I heard that there is a unit in the south for making LEDs (a kind of semiconductor solid-state light-emitting device, which uses a solid semiconductor chip as a light-emitting material. When a forward voltage is applied to both ends, carriers in the semiconductor recombine to cause photon emission. Light, can directly emit red, yellow, blue, green, blue, orange, purple, white light) required plastic sealing mold, lens injection mold, lead mold frame mold, once purchased CNC EDM machine (NCSEDM), CNC There are about 150 wire-cutting machines (NCWEDM) and machining centers (MC), most of which are high-end EDMs, especially SEDM.
The mass production of high, fine and sharp molds is indeed an industry news worthy of attention. What information does this convey to us?
1. EDM has reached the level of precision and precision in the field of high precision machining.
Carbide lead frame progressive die has had successful experience with IC chips, but such high-demand cavity die mass production is the first case. For example, the point gate taper hole (φ 0.3±0.002 5) mm of 32 L ED plastic molds is continuously processed, and the hole pitch tolerance is ±0.002 5 mm. L ED plastic sealing die size accuracy <0.002mm, surface roughness value R a=0.1μm, base angle R <0.02mm, the most critical LED lens injection cavity size is only 1.9mm × 0.84mm × 0.848 8mm, a long spherical surface 1 2 pieces at a time, the profile degree is 0.01 mm, and the surface roughness value R a=0.06 μm. These indicators are undoubtedly at the forefront of metal processing, especially for LED services, which is a large-volume and wide-ranging commodity that meets stringent price/performance requirements. Therefore, this EDM processing technology has a high value, it once again enhances the status of EDM in metal processing, indicating that EDM is still a promising innovative process, and should give more attention in China's science and technology research and development project. .
2. Form a flexible production system centered on EDM
Formed a flexible production system with EDM as the core, and the processing center, electrode and workpiece machine to adjust the detector, electrode and workpiece library to form a production line, and the process management software is connected in series.
Because LED applications are very wide and there are many varieties, such complex high-quality, precise and pointed projects have relied on a group of elite technologies to solve problems. Be careful and cautious to have a look; nowadays such a huge fleet does not have an intelligent system operation. It will be unimaginable.
3. EDM's autonomy and intelligence have been greatly improved
The machine tool can purchase 150 units at a time, but this huge team of operators is difficult to guarantee the consistency of quality and the beat of the operation. Therefore, this batch of high-grade EDM must be able to operate autonomously, and its processing performance is largely unconstrained by human factors.
The Name of Rectangular Duct Fan
Rectangular pipe see / centrifugal Pipe Fan impeller for the front-wing multi-blade centrifugal impeller, single suction, the fan is designed to enter and exit horizontally, the square inlet and outlet can be directly connected with the duct, fan motor for air conditioning motor, the machine has a noise Low smooth operation, long service life and other characteristics
According to the diameter of 140 ~ 500mm sixteen series of specifications for the air volume of 130 ~ 7280m3 / h, the total pressure of 45 ~ 810Pa, in order to meet the noise requirements of different places, divided into: ordinary type: all the materials for galvanized steel through the bite Mouth shape
Muffler type: the fan part of the galvanized steel through the bite shape, box board for the color coated with acoustics materials, aluminum frame for the profile, the inlet and outlet with a filter
Rectangular duct fan / Centrifugal Fan bar
The type of gas delivered: air and other unnatural, non-corrosive, harmless gases
Impurities in the gas: the gas must not have viscous material, dust and hard particles contained in more than 120mg / m3
Performance curve
Gas temperature range of use: -200C ~ 800C This series of fans are used only indoors, and should be installed in the direction of the sample front view, not upside down installation, installation is not allowed side legislation, otherwise it will affect the service life of the motor, for outdoor installation , Must consider the motor rain measures
Rectangular pipe fan / centrifugal pipe fan design selection instructions,
The pipeline fan is a forward multi-wing centrifugal fan, the same air volume, partial pressure case, the noise is much lower than the axial fan
This series of fan air volume, wind pressure, noise and other parameters are based on the actual needs of many projects proposed, widely used in public places to send exhaust system
The top of the fan housing marked with the direction of the arrow out of the air, to avoid reverse installation, delivery, exhaust series under normal use
When the transport of cold air may cause condensation on the outer surface of the casing and pipe fans should be designed insulation, fan noise is the rated air flow, air pressure is not connected to the air duct when measured at a distance of one meter from the outlet , With the inlet and exhaust pipe, the noise will be attenuated, for the noise requirements of the higher occasions, the exhaust pipe should be arranged in the muffler elbow or muffler, fan with single 200V motor power wiring diagram Place in the fan power junction box
Vibration small fan operation, the general need to use damping measures, if the design considered necessary, the fan can be supplemented with damping rubber or rubber vibration damping spring
if you want more information,please contact us.
Rectangular Duct Fan
Rectangular Duct Fan,Rectangular Inline Duct Fan,Portable Rectangular Duct Fan,Rectangular Ventilation Fan
Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com