Sensor-based pipe fitting internal thread detection method, pipe fitting screening method and system
A detection method and sensor technology, applied in the field of internal threads, can solve the problems of small-sized threads and low detection accuracy of thread depth, and achieve high-efficiency online detection and strong compatibility
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Embodiment 1
[0053] In actual engineering, there are often problems such as machining errors and other factors that cause the wall thickness of the pipe fittings to be uneven in the radial direction, so that the inner and outer walls of the pipe fittings are not in the same axis. image 3 Shown is a schematic diagram of a pipe with the inner and outer walls not coaxial. Aiming at the internal thread detection of such pipe fittings whose inner and outer walls are not coaxial, this embodiment discloses a method for detecting the internal thread of pipe fittings based on sensors. The internally threaded hole is a circular hole of equal diameter. The method includes the following steps:
[0054] Step 1, determine the axis position of the outer wall of the pipe to be tested;
[0055] In this embodiment, the pipe to be tested is preferably passed through the center of the space coordinate system. Specifically, by setting the clamping mechanism for clamping the pipe to be measured, the clamping...
Embodiment 2
[0068] In this embodiment, the internal thread of the pipe fitting to be tested is a tapered thread, that is, the internal thread hole of the pipe fitting to be measured is tapered, such as Figure 5 shown. The difference between the internal thread detection method of the present embodiment and embodiment 1 is:
[0069] Step 3, when the inner circle of the pipe to be measured is tapered, the horizontal position of the horizontal distance measuring sensor is adjusted in real time during the movement of the horizontal distance measuring sensor along the axial direction of the pipe to be measured. Ensure that the surface of the inner circular thread of the pipe fitting to be tested is within the measuring range of the horizontal distance sensor.
[0070] The detection method of the invention solves the problem that the traditional detection method cannot determine the axis of the inner wall of the workpiece when the inner and outer walls of the workpiece are not in the same axi...
Embodiment 3
[0073] This embodiment discloses a sensor-based pipe fitting screening method, which is used to screen qualified and unqualified pipe fittings with internal threads, and the method includes the following steps:
[0074] Step 1, determining the specification type of the pipe fitting to be tested, the specification type of the present embodiment includes the outer diameter, inner diameter, wall thickness and height of the pipe fitting to be tested;
[0075] This embodiment specifically includes: setting a vertical ranging sensor 11 above the pipe to be tested, and the vertical distance measuring sensor 11 moves from a point outside the outer wall of the pipe to be tested to the outer wall of the pipe to be tested along a horizontal direction intersecting the axis of the outer wall of the pipe to be tested At another point outside, the specification type of the pipe to be tested is obtained according to the signal change of the vertical distance measuring sensor.
[0076] In orde...
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