Target-distance-adjustable nozzle and method suitable for abrasive water jet steel rail polishing

Abstract

The invention discloses an adjustable-target-distance nozzle and method suitable for abrasive water jet steel rail polishing, the adjustable-target-distance nozzle comprises a nozzle main body, an outer cover, a lower baffle, a support frame and an upper baffle which are arranged on the same central axis, the nozzle main body is connected with the upper baffle through threads, and the nozzle target distance can be adjusted by screwing the displacement of the nozzle main body; the outer cover, the lower baffle and the support frame sleeve the nozzle main body to limit the radial displacement of the nozzle main body; a pressure sensor is arranged between the nozzle body and the supporting frame, a spring is arranged between the supporting frame and the upper baffle, the elastic coefficient of the spring is measured through the calibration gauge and the read pressure value, the upper computer generates a pressure-displacement curve comparison table according to the elastic coefficient, and after the adjustment distance needed by the optimal target distance to be adjusted of the nozzle is measured, the pressure-displacement curve comparison table is adjusted. The upper computer gives a pressure threshold value, the nozzle body is screwed to enable the pressure borne by the spring to reach the threshold value, and then the adjustment work of the optimal target distance can be completed. The nozzle can be independently adjusted, the target distance precision of other nozzles is not affected, the operation method is simple, and the target distance adjusting precision is high.

Description

technical field [0001] Embodiments of the present invention belong to the technical field of abrasive water jet grinding, and more specifically relate to an adjustable target distance nozzle and method suitable for grinding abrasive water jet rails. Background technique [0002] With the construction and operation of a large number of high-speed railways in my country, the maintenance of high-speed steel tracks has become an important issue. At present, the main way of rail grinding is to use grinding wheels to grind the metal on the rail surface to repair the damage on the rail surface. However, there are many deficiencies in the traditional grinding wheel grinding method, the most important of which include thermal influence and low machining accuracy. Therefore, some researchers have studied how to grind rails. High-pressure abrasive water jet technology is widely used in cutting and drilling because of its high processing efficiency, simple structure, and convenient co...

AI Technical Summary

Problems solved by technology

In this technical solution, since the rail grinding is generally carried out on the railway, the space is small, and the operable position is limited. However, it is inconvenient to adjust the single nozzle by using multiple nozzles to coordinate the grinding of the rail, and it needs to be continuously adjusted according to the measurement data to achieve The optimal target distance requires a large and cumbersome workload. At the same time, adjusting the target distance for a single nozzle through the robotic arm will drive the position of other nozzles to change, which will reduce the accuracy of the target distance of other nozzles and cause grinding errors.

Images