冷拔鋼管根據(jù)工藝基礎常用的四種測量方式

冷拔鋼管依據(jù)廠家工藝小口徑冷拔鋼管要求的不同，有多種測長辦法。主要有以下幾種：一、光柵尺測長：基本原理是冷拔鋼管兩頭外側分別設置兩個固定長度的光柵尺，使用無桿氣缸帶動光柵尺接近冷拔鋼管兩頭，使用光的干涉現(xiàn)象完成對冷拔鋼管長度的丈量。特點是準確度高。但光柵尺價格昂貴且保護困難，冷拔鋼管對灰塵和場所振蕩的影響很靈敏。

There are many methods for length measurement of cold-drawn steel pipe according to the different requirements of small-caliber cold-drawn steel pipe manufacturer. There are mainly the following kinds: 1. Grating ruler length measurement: the basic principle is to set two fixed length grating rulers on the outside of the two ends of cold-drawn steel pipe, use rodless cylinder to drive the grating ruler close to the two ends of cold-drawn steel pipe, and use light interference phenomenon to complete the measurement of the length of cold-drawn steel pipe. It is characterized by high accuracy. However, grating rulers are expensive and difficult to protect. Cold-drawn steel tubes are sensitive to dust and site oscillation. 二、編碼器測長

2. Encoder Length Measurement

原理是油缸處裝置編碼器，使用油缸推進冷拔鋼管在輥道上運動，另一側裝置等間隔的一系列光電開關，當冷拔冷拔鋼管被油缸推進管端碰到光電開關時，從記載的編碼器讀數(shù)，換算出油缸的行程，這樣能夠計算出冷拔鋼管的長度。

The principle is to install an encoder at the oil cylinder, which uses the oil cylinder to propel the cold-drawn steel pipe to move on the roller, and a series of photoelectric switches with equal intervals on the other side. When the cold-drawn steel pipe is touched by the photoelectric switch at the end of the oil cylinder, the distance of the oil cylinder can be calculated from the recorded encoder reading, so that the length of the cold-drawn steel pipe can be calculated.

特點是測長時需求將冷拔鋼管升起。此外，光電開關檢測也存在必定差錯，可能需求充沛丈量。

The characteristic is that the cold-drawn steel pipe will be lifted up by the demand of measuring length. In addition, there are also certain errors in photoelectric switch detection, which may require abundant measurement.

三、攝像機測長。

3. Camera Length Measurement.

攝像機測長是使用圖畫處理完成冷拔鋼管長度丈量，其原理是冷拔鋼管輸送輥道某一段上裝置等間隔的一系列光電開厚壁冷拔鋼管關，另一段上加光源和攝像機。當冷拔鋼管經(jīng)過這一區(qū)域時，能夠依據(jù)某一處光電開關經(jīng)過攝像機攝取圖畫在屏幕上的方位來斷定冷拔鋼管長度。

Camera length measurement is to measure the length of cold-drawn steel pipe by using picture processing. Its principle is that a series of photoelectric thick-wall cold-drawn steel pipe closures with equal intervals are installed on one section of the cold-drawn steel pipe conveying roller, and light source and camera are added to the other section. When the cold-drawn steel pipe passes through this area, the length of the cold-drawn steel pipe can be determined according to the orientation of a photoelectric switch passing through the camera and drawing on the screen.

特點是可完成在線丈量，冷拔鋼管在經(jīng)過測長區(qū)域時即可取得長度數(shù)據(jù)，無間隔。缺乏是假如不必特設光源照射，冷拔鋼管就會遭到外界光的攪擾，而選用特設光源后因為冷拔鋼管在倒棱后管端亮度高而對光線的反射很強，容20#冷拔鋼管易形成讀數(shù)差錯。

The feature is that on-line measurement can be completed. Length data of cold-drawn steel pipe can be obtained without interval when it passes through the length measuring area. The lack is that if the special light source is not needed, the cold-drawn steel pipe will be disturbed by the external light. When the special light source is selected, the light will be reflected strongly because the brightness of the cold-drawn steel pipe is high at the end of the chamfered pipe. The 20 # cold-drawn steel pipe is easy to form reading errors.

四、改進型編碼器測長

IV. Improved Encoder Length Measurement

這種辦法是一種直接丈量辦法，經(jīng)過丈量冷拔鋼管兩個端面與各自基準點之間的間隔，直接測出冷拔鋼管長度。冷拔鋼管兩頭各設置1臺測長小車，初始方位為零位，間隔為L然后移動編輯器長度到各自冷拔鋼管管端的行走間隔(L2L3L-L2-L3即為冷拔鋼管的長度。

This method is a direct measurement method. The length of cold-drawn steel pipe can be measured directly by measuring the distance between the two ends of cold-drawn steel pipe and their respective reference points. Each end of the cold-drawn steel tube is equipped with a length measuring trolley. The initial orientation is zero, the distance is L, and then the walking distance from the length of the editor to the end of the cold-drawn steel tube is moved (L2L3L-L2-L3 is the length of the cold-drawn steel tube).

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