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扼要地介绍双螺杆式气门校正机的机械结构，分析气门受力和校直原理，讨论三个校正工艺参数，即气门中心降低量Δ，两螺杆最近工作距离Δ１和液压滑台工作压力Ｐ对校正质量和效率的影响，探讨螺杆锥度结构的作用，最后用批量生产试验说明机器校正相对人工校直的优缺点
Briefly introduce the mechanical structure of twin-screw valve calibrator, analyze the principle of valve force and alignment, and discuss the three correction process parameters, namely the valve center reduction Δ, the working distance Δ1 of the two screws and the working pressure P Correction of quality and efficiency of the role of screw taper structure of the discussion, and finally mass production test shows the advantages and disadvantages of machine calibration relative to manual straightening