Cam indexing mechanism
The computer-aided manufacturing process of cam is generally composed of three parts: computer graphic representation of cam part geometry, NC programming, information transmission and machine tool processing. The representation of points, lines, etc. is quite simple, and the cams encountered in machining often contain complex curves or surfaces. Computers are generally difficult to characterize and need to be described by a certain number of discrete points. This requires mathematical methods to construct energy. Curves and surfaces that pass completely or are closer to a given point (the process of mathematically finding a curve or surface passing through a given point is called a curve or surface fit), and then calculating the fit curve or surface between the given value points. Several points (often referred to as interpolation points). Such as arc spline curve, cubic parameter spline curve, Bezier curve, B-spline curve, bicubic parameter surface, Bezier surface, B-spline surface, single linear surface, etc. are all to more accurately represent the processed Cam geometry features. Using modern computer graphics, three-dimensional objects such as CNC machine tools, machined cams, and tools can be displayed on the screen to prepare for subsequent tool machining simulation and NC programming.
The shape of the cam parts is relatively complicated, and it is difficult to process by the method of two-axis linkage. It is not enough to rely on manual programming. At this time, it is necessary to use a computer to prepare machining instructions, so-called automatic programming. First of all, the numerical control machining calculation is carried out, taking the three-coordinate numerical control machining as an example, and the ball-end knife is commonly used in the surface numerical control machining.
(Finish)
What the unloader valve does is that is responds to the compressor pressure switch turning the power off to the motor and allows any air that may be trapped over the piston, or pistons on a multi-cylinder air compressor, to vent to atmosphere, removing any load that the trapped air may have created over the cylinder .
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