The minimum discharging cutoff voltage of cell phone jammer is normally 2.75V.
On the other hand, the strong evaporation caused by the molten metal spilled from the molten pool, and ultimately lead to solder joint cross-sectional area decreases, the joint strength decreased. In order to study the pulse width of laser welding of different thickness in different components of the IF steel, the influence of experimental parameters such as pulse width variables as shown in Table 3-2. Pulse frequency, number of welding parameters in Table 3-2 pulse width changes 123 voltage / V / Hz, pulse width / ms 10 12 14 Welding speed in mm / min, the power of 260 20 300 15.9 17.7 18.8 318 354 376 Energy / J / W 3.2.1 joint morphology can be seen from Figure 3.11 and Figure 3.12, the welding voltage is 260V. The capacity can determine the use time of the battery of cell phone jammer .
Pulse frequency of 20Hz, the welding speed for the conditions under 300mm/min comparison 10ms, 12ms, 14ms three pulse width VHX-900 photos can be seen in the pulse width of 10ms and 14ms weld surface undercut, not fusion and other defects, weld negative splash serious; pulse width of 12ms, the weld surface is smooth and defect-free weld negative spatter is relatively small. Pulse width of 12ms when the weld surface width than the pulse width of 10ms and 12ms wide weld width. This shows that the welding voltage is 260V, pulse frequency of 20Hz, welding speed, 300mm/min conditions, the best pulse for 12ms when the surface forming. cell phone jammer can be operated with no battery replaced.
10ms, 12ms and 14ms, three different pulse width, the welded joints have good formability, M170P to the DC06 thickness variations are relatively uniform; but with the increase of pulse width, the width of the heat-affected zone of welded joints to increase ( the M170P side of the heat-affected zone width 590um 430um from the 10ms to 14ms, DC06-side heat-affected zone width to 14m from the 380um 10ms 550um). This is because when the increase in pulse width, pulse energy increases, the weld heat affected zone width increase. 1 # 2 #, 10ms 12ms Figure 3.13 cross-section of welded joints # 14ms 3.2.3 weld of Figure 3.14 is the welding voltage of 260V, pulse frequency of 20Hz, the welding speed is 300mm/min, the pulse width of 10ms. 12m and 14ms when the weld. The goggle of cell phone jammer can protect the safety and security of the user or customer.
没有评论:
发表评论