Guardrail type step pitch gauge

Abstract

The invention discloses a guardrail type step pitch gauge and belongs to a measuring tool. The guardrail type step pitch gauge is composed of a reference end cover, a pedestal, an auxiliary end cover, a workload block, a cushion block and a tightening screw, wherein the two end covers are connected with the pedestal by using inner hexagonal screws, the workload block is arranged in a pedestal groove and is fittingly ground with the cushion block, and a guardrail may form a one-body structure with the pedestal or objects in other shapes form detachable or non-detachable connection with the pedestal. The guardrail type step pitch gauge has the advantages of high working size precision, convenient use, good stability, and anti-impact and anti-bump performance. The guardrail type step pitch gauge is mainly used in proof reading of a laser interferometer, detection of a numerical control machine, detection of a coordinate measuring machine and other precise instruments.

Description

Technical field [0001] The invention relates to a measuring tool, in particular to a guardrail type step gauge. Background technique [0002] A step gauge is a physical length standard used for precision length measurement. It is a highly precise multi-valued measuring tool composed of several working blocks arranged in a step gauge base at a certain interval. It is used for calibrating laser interferometers, testing CNC machine tools, especially high-end CNC machine tools, testing three-coordinate measuring machines, optical imagers and other precision instruments. At present, there are only a few companies in the world that can produce step gauges, and China is one of them. [0003] The step gauge is an extremely precise measuring instrument, and its working dimensional accuracy and stability are crucial technical indicators. In addition to the influence of manufacturing technology on this indicator, care must be taken in transportation, use and storage. If it is accide...

AI Technical Summary

Problems solved by technology

But also because of its convexity, the stability of the working size of the step gauge is poor. Once it is collided, the original accuracy will be lost; (2) the concave step gauge is characterized in that the working block is recessed in the groove of the substrate, and the working amount Blocks and pads are ground together, figure 2 It is a concave grinding type step distance gauge, because the working blocks are concave in the groove of the base body, and it is protected by the surrounding parapet wall, so the dimensional stability is good

However, it is inconvenient to use because there are retaining walls on both sides of the concave, especially when inspecting CNC machine tools, the probe of the auxiliary instrument (generally a lever dial indicator) can only enter and exit in the height direction, and not in the width direction (horizontal direction). In and out, it brings great inconvenience to the use; (3) The concave non-grinding step gauge is characterized in that the working gauge block is recessed into the groove of the base body, and the working gauge block and the cushion block are not grinded together. image 3 It is a concave non-researching type step distance gauge, and because the working blocks are all concave in the base groove, it is protected by the surrounding parapet wall and has good dimensional stability, but it is inconvenient to use because of the parapet wall on both sides of the concave. After research and cooperation, its accuracy is relatively low

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