green laser pointer can be used to indicate and write

Sheet Laser Forming Research. Sheet laser forming mechanism. According to the sheet thickness direction of the temperature distribution in the laser heating, the laser forming mechanism of the following four: (1) the temperature gradient mechanism. When one side of the sheet metal by laser irradiation, will have great temperature gradient in the thickness direction of the irradiated region. Produce expansion due to differences in temperature, the metal material in the region near the light source is easy to heat deformation, sheet metal bending toward the reverse zone, but the amount of bending will be very small in the area of the back light was not constrained by the laser irradiation temperature is not . And the incoming test of the raw material of    green laser pointer   should be performed.
Thermal expansion of the area will be subject to the constraints of the surrounding area arising from the compressive strain. Cooling, the heat flow to the surrounding material, shrinkage of the deformation zone, they will be the compression zone material tensile stress, but the deformation zone of the material difficult to restore the original shape, so that the sheet metal bending toward the direction close to the light source. Figure 1-a, at the deformation is similar to the three-point bending of sheet metal forming. The ② buckling. If the heating zone is too large, the high thermal conductivity of the material thickness is too small, the temperature gradient in the direction of sheet thickness will exceed the material due to the constraints of the surrounding material will heat sheet in compressive stress, when stress the yield stress, the material of the heating zone to produce local buckling, and bending. The raw material of    green laser pointer  is acceptable.
During cooling, the surrounding material, the binding effect of the deformation zone decreases, so that the sheet metal to produce a greater bending deformation. Figure 1-b, at the deformation is similar to the sheet extrusion pressure is applied in the plane direction of plate deformation. The ③ thickening mechanism of thermal expansion of the material of the heating zone, due to the constraints of the surrounding material, so the material in the thickness direction will result in higher internal compressive stress material accumulation, which would make the material thickness direction of increase in length or width is reduced, the material in the cooling process, the heating zone can not be restored in order to produce thickening. Because the specification of this kind of battery used by     green laser pointer   is 15*27mm.
Can be achieved by choosing the correct path of the heating, the parts of the process. Figure 1-c, the deformation at similar deformation of the slab in the plane direction of the extrusion pressure is applied. ④ elastic expansion mechanism, when only laser irradiation a local area, the heating zone of the sheet caused by thermal expansion than the temperature gradient mechanism, the thermal expansion performance in the local, causes the sheet to produce a pure elastic deformation, so that the sheet metal small bending. This bending is limited, so we can point or block exposure on our neighbors and ways to increase the deformation, as shown in Figure 1-d. However, this mechanism can not be in the same location repeatedly heated to further increase the amount of deformation. And there is no mark at the negative pole of the battery used by    green laser   .
Because it would be the last elastic deformation relaxation, usually on our neighbors and the point or block exposure to increase the deformation. Sheet laser forming factors. Laser forming of the sheet is a very complex thermal coupling process, affect its forming factors: First, the sheet geometry, especially the sheet metal thickness is very significant effect. Is generally believed that when the plate is very thin with the thickness increase, the sheet on the bending moment of resistance, the temperature gradient of the upper and lower surfaces of the sheet and the corresponding bending moments are increased. Within a certain range, the bending moment increases dominated, with the thickness increases the bending angle increases. However, with the thickness continues to increase. When the battery is charging, the indication light on the charger used by this kind of     laser pointer  will be on.
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