System and method for measuring centre position and exradius of ring by utilizing snubber rolls

Abstract

The invention discloses a system and a method for measuring the centre position and the exradius of a ring by utilizing snubber rolls. The system for measuring the centre position and the exradius of the ring by utilizing the snubber rolls comprises the ring. One side of the ring is symmetrically provided with a snubber roll I and a snubber roll II which are contacted with the outer wall of the ring; the two snubber rolls are respectively connected with corresponding oil cylinder II and oil cylinder II through respective snubber arm I and snubber arm II; corresponding displacement sensors arerespectively arranged in the two oil cylinders; the inner wall of the ring is provided with core rolls contacted with each other; and the outer wall of the ring is contacted with a main roll. According to the method for measuring the centre position and the exradius of the ring by utilizing the snubber rolls, a mathematical relation between the centre position and the exradius of the ring and thestrokes of the two oil cylinders is derived through establishing a system of rectangular coordinates. The strokes of the two oil cylinders, which are measured by the displacement sensors arranged in the oil cylinders, are substituted into calculation software, and thus, the numerical values of the instant centre position and the exradius of the ring can be obtained, and simultaneously, whether the ring deviates or not and the offset when the ring deviates can be discovered according to the centre position, and the out of roundness of the external diameter of ring can also be detected. By applying the method, a measuring roll system of a traditional ring rolling machine can be removed, the method is easy to implement, the cost is reduced, and the precision is higher.

Description

technical field [0001] The invention relates to a system and method for measuring the position of the center of a ring and the radius of the outer circle of the ring by using a holding roller, and belongs to the field of metal pressure forming. Background technique [0002] The radial-axial ring rolling machine is the key equipment for producing large-scale high-quality seamless ring parts such as wind power tower connection flanges, rocket launcher connection flanges, large slewing bearings for ground launches, nuclear island evaporators, and nuclear reactor vessels. During the ring rolling process, the measurement of the instantaneous ring diameter plays an important role in the final dimensional accuracy of the ring. Existing ring rolling machines usually measure the outer diameter of rings through measuring rollers, and the center of the measuring rollers is located on the line connecting the main roller and the core roller. When the center of the ring is located on the...

AI Technical Summary

Problems solved by technology

As a result, the measured ring diameter is inaccurate

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