Measuring device and method for measuring outer diameter and roundness of large-diameter gas cylinders

Abstract

The invention belongs to the technical field of measurement, and provides a measuring device and a measuring method for the outer diameter and roundness of a large-diameter gas cylinder. The proposed measuring device for the outer diameter and roundness of large-diameter gas cylinders has a rigid right-angle frame (1) composed of a vertical rod (12) and a cross rod (11) at the lower end of the vertical rod (1); the upper end of the vertical rod (12) is fixedly connected to the There is a chute I (6) set horizontally; the cantilever cross bar (4) is located at the upper end of the vertical bar (12) and is set parallel to the horizontal bar (11); the measuring device also includes a Scale (3); the scale of the scale (3) increases sequentially from top to bottom; the upper end of the scale (3) slides with the chute II (5) on the cantilever bar; the lower end of the scale (3) A bar block (2) arranged parallel to the cross bar (11) is connected. The invention plays an active role in the geometric quality inspection and quality control of the outer diameter and roundness of the gas cylinder after heat treatment, has good versatility, and reduces the inspection cost.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to a measuring device and method for measuring the outer diameter and roundness of a large-diameter gas cylinder, in particular to a measuring device and a measuring method for the outer diameter and roundness of a large-diameter gas cylinder with a diameter greater than 200 mm. Background technique [0002] In the manufacturing process of emerging energy storage and transportation pressure vessels (such as large-diameter seamless gas cylinders), according to the requirements of process technology, an overall heat treatment process is required. Due to the deformation caused by stress release during the heat treatment process, the original geometric dimensions of the product Therefore, after heat treatment, it is necessary to measure the outer diameter, roundness and other geometric dimensions of the gas cylinder in accordance with the requirements of the product manufacturing drawi...

AI Technical Summary

Problems solved by technology

Other small part non-universal detection technology can basically be divided into two types of forms of laser measurement and mechanical measurement; wherein, the device that utilizes the laser method to measure the roundness of the workpiece is more complicated, as disclosed in CN 104567714 A "portable non-contact roundness "Instrument for measuring degrees", not only need to install a laser tube on the shell, but also to embed liquid crystal screens and fixed CCDs on both sides, and also need to have a DSP image processor inside the shell, not only the cost is high, but also requires personnel to have a strong electronic Component knowledge is more suitable for non-contact sites, which is not convenient for quick measurement at the gas cylinder production site

The device for measuring the roundness of workpieces by mechanical methods has the following problems: first, the size of such devices matched with large-diameter workpieces is very large, takes up a lot of production site space, and increases the number of hoisting times, increasing the risk, such as CN 104567624 A disclosed "circular tube ellipticity measurement device", in the measurement process, the circular tube needs to be hoisted to the device support frame, locked and then rotated for detection. Large-sized circular tubes are difficult to rotate, and it is inconvenient to hoist up and down, and the operation is cumbersome and frequent. Hoisting risk; second, the actual value cannot be recorded, and only qualified or not can be judged, such as the "steel pipe roundness measuring instrument" disclosed by CN202188833 U. During the measurement process, the sensor rotates 360° around the steel pipe. When the steel pipe does not meet the requirements, the grating The automatic red alarm of the ruler displacement display will show a green light if it is qualified; the third is that the actual operation is more difficult to realize, such as the "roundness measuring instrument and its measuring method" disclosed in CN 103542830 A. However, CN 201780083 U discloses "a measuring tool for measuring the extreme value and ellipticity of steel pipe diameter". During the measurement process, the measuring device needs to be artificially rotated 360 degrees along the outer wall of the pipe fitting. The main shaft of the steel pipe is vertical, and the 360-degree rotation of the measuring device is not easy to realize due to the actual placement of the pipe fittings

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