Test method for cast iron square tube
Test method for cast iron square tube : For a square tube with a side length of 300 mm and below, a 1 mm gauge block is placed on both ends of the cast iron square tube to be inspected , and the knife edge is placed on the gauge block working surface, and then The amount of the block at each point to be inspected is tested, and the difference between the size of the equivalent block group just inserted and the size of the block at both ends is the deviation between the ends of the pair. This test shall also be carried out on several sections in the longitudinal, transverse and diagonal directions of the square face. The cast iron square tube takes its maximum value when the error directions in the straight lines of the measured positions are the same. When the error direction is inconsistent, the sum of the maximum positive difference and the absolute value of the maximum negative difference is taken as the flatness of the plane of the examined surface.  Overall size iron platform up to 4 m × 8 m, larger than this size can be a plurality of stitching, after wear. The re-repair scratch resume its accuracy, available coloring method test parts flatness, accurate, intuitive and convenient advantages . The table seat and the workpiece are pushed smoothly on the cast iron plate which has been scraped , and the workpiece is not smooth, which is convenient for measurement and ensures measurement accuracy. Want to know more about cast iron square box , square tube knowledge? Click http://ZTFXXL.html
Focusing Lenses. The focusing lens is the last optic in the laser path, before it hits the workpiece. Its main role is to focus the laser beam to a specific focal length (FL) - depending on the application. Therefore, the focal length - that is dictated by the radiuses and curvatures of the lens - is its most important feature.Focusing the beam ,produces a focus of high energy density that processes the work piece Product characteristics: • High design accuracy, high precision machining, all systems have reached the diffraction limit •The focus is deep, good consistency across the focal depth range Plane-convex focusing lens is applied to CO2 laser. One side is flat and the other side is convex. The substrate is laser-grade CVD ZnSe and coated with the double-sided anti-reflective film. The convex surface should face the perpendicular incident light beam and the plane should face the workpiece. Meniscus focusing lens is concave and convex focusing lens. The substrate is laser grade CVD ZnSe and coated with the double-sided anti-reflective film. Meniscus focusing lens can effectively reduce spherical aberration and produce smaller light spot than plane-convex focusing lens. The convex surface should face the perpendicular incident light beam and the concave surface should face the workpiece.
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