Processing method for no-crown guide blade of steam turbine
A processing method and a guide vane technology, which are applied in the processing field of steam turbine blades, can solve the problems of non-uniform benchmarks, complicated processing technology of guide vanes without crowns in steam turbines, etc., so as to reduce large allowance milling, save datum surface processes, and improve production. The effect of efficiency
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specific Embodiment approach 1
[0023] Specific embodiment one: the processing method of a kind of steam turbine without crown guide vane of the present embodiment, concrete steps are as follows:
[0024] The inner arc processing steps are:
[0025] 1. Fixture: Place the inner arc blank of the blade at the installation angle at the position of 0.3L and 0.7L of the back arc line of the blade with the line spacer;
[0026] 2. Measurement: use the profile measuring tool to measure the profile line of the inner arc of the blade placed in the installation angle state, and measure the data of the profile line of the inner arc of the blade;
[0027] 3. Program and processing: UG software is used to carry out solid modeling and numerical control of the blade, and directly process the inner arc blank selected in step 1, and the length positioning direction positioning surface and the steam outlet side of the inner arc shape line and back arc processing. The direction positioning datum plane is machined and kept cons...
specific Embodiment approach 2
[0034] Embodiment 2: This embodiment differs from Embodiment 1 in that the blade installation angle described in step 4 is the blade installation angle relative to the rotation angle between the machine tools. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0035] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the determined fixture described in step 4 matches the length direction of the inner arc processing and the positioning surface in the direction of the steam inlet side, and the matching is consistent. Refers to the uniform processing standard. Others are the same as in the first or second embodiment.
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