China laser pointer integrates with various technologies

Gaussian surface heat source distribution is a more realistic than the point-like source of heat and linear heat source, heat source distribution function near Gaussian distribution of surface heat source in the form used in this paper, the heat flux distribution function: where, as the material The laser absorption coefficient, P is the laser power, R is the beam radius, r is the distance from the center of the spot inspection point. In the laser cleaning process of the mold surface, the laser energy in the form of heat flux loaded into the mold surface, and move to a certain speed, thus using the ANSYS parametric design language to establish the load matrix form discrete space domain to the time domain, different locations at different times of the heat source load input, and set a certain time of step, so that you can simulate the mold surface temperature field.  green laser pointer    possesses the function of the laser pen.
Thermal parameters of the determination. The molds are generally made from 45 steel or carbon steel, 45 steel as an example. For 45 steel, its density and temperature changes is not large, constant handling, did not affect the final result. Here, the manual check of 45 steel of density 7833 kg/m3, The specific heat capacity, thermal conductivity, such as temperature affects the large thermal parameters of input, to ensure the accuracy of the calculations must be based on the data in table 1. Manual investigation of 45 steel specific heat capacity, thermal conductivity and temperature is shown in Table 1. Figure 1 division of the grid after the mold surface. In this paper, the ambient temperature to 20 ° C, air, natural convection heat transfer coefficient of 12.5W / (m2 ? ° C). All extra functions of   laser pointer   has the common feature of remote control.
Modeling and meshing. Analysis of temperature field of the laser cleaning mold, due mainly to the mold surface temperature distribution, so we choose the 2D field analysis, which can greatly simplify the calculation process. Mold surface right angle vertex coordinates (-0.045, -0.03) and (0.045,0.03). On the mold surface of meshing, it is assumed that the laser is along the middle of the mold cleaning mold surface, so to mold the middle of the grid refinement, the division of the mold surface shown in Figure 1. Temperature field and thermal boundary conditions. According to the theory of heat transfer, without internal heat source, non-steady-state two-dimensional temperature field, heat conduction differential equation for the.   green laser   is also the related products of multifunctional projecting equipments.
Boundary conditions: Q is the unit volume heat generation rate, h is the surface to put where: ρ, c and λ, respectively, the material density, specific heat, thermal conductivity; T-Tf, respectively, for the transient temperature, medium temperature; heat transfer coefficient; Γ, n respectively, the solid boundary and the outward normal; t is time. Simulation results and discussion. The nodal temperature distribution analysis. Figure 2 reflects the laser power of 50W, the scanning speed of 3.5mm / s, at different times of the mold surface node temperature distribution, which in Figure 2 (a) t = 2s, Figure 2 (b), t = 6s, Figure 2 (c) t = 10 s, in Figure 2 (d) t = 14s in Figure 2 (e) t = 20s in Figure 2 (f), t = 26 s.    china laser pointer    integrates with various technologies.
It can be seen, with the moving laser heat source to a certain speed is loaded into the surface of the mold, the mold surface temperature distribution also changes with the movement of the laser heat source, showing a comet-like tail dragging, and scanned with the laser the range of the heat-affected zone is growing increasingly evident, the dynamic characteristics of the temperature field in the front end of the laser irradiation temperature gradient, the tail of the temperature gradient is relatively small, fast-moving laser heat source. Table 145 steel heat capacity, thermal conductivity and temperature. Figure 2 at different times of the nodal temperature distribution of the temperature of the mold surface node. Temperature of the mold surface node. The wireless mouse control technology is one of the technical bases of    green laser pointer   .