Centering device and assembling method

The invention provides a centering device and an assembling method, the centering device is suitable for centering a to-be-assembled part and an assembled part of a furnace body, and the centering device comprises an emitter used for emitting an aperture, and the position and the size of the aperture are matched with the position and the size of the to-be-assembled part; and the support is connected with and supports the emitter and enables the emitter to be located on the axis of the assembled part, so that the axis of the aperture coincides with the axis of the assembled part, and centering assembly of the part to be assembled and the assembled part is achieved. In this way, assembling personnel are prevented from repeatedly conducting centering measurement and movement, the centering process is simplified, and the centering efficiency is improved. 本申请提出了一种对中装置和装配方法，对中装置适用于炉体的待装配件和已装配件的对中，并包括：发射器，用于发射光圈，光圈的位置和尺寸分别与待装配件的位置和尺寸适配；支架，连接并支撑发射器，并使发射器位于已装配件的轴线上，以使光圈的轴线与已装配件的轴线重合，实现待装配件和已装配件的对中装配。通过如此，避免装配人员反复进行对中测