Drill pin holes in the control valve stem
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This post was last edited by wx_Ink Fragrance 822822 on 2023-4-25 at 14:46. How to ensure that the pin hole drilled in the turbine control valve stem is concentric with the pin hole in the valve stem sleeve? It won’t drill at an angle or off-track
To ensure that the pin hole drilled in the turbine control valve stem is concentric with the pin hole in the valve stem sleeve, the following measures can be taken: 1. Select appropriate tools and equipment. Precision measuring instruments and machining equipment are required, along with the selection of appropriate tools and drills for the machining process. 2. Precise positioning. Before machining, the center lines of the valve stem sleeve and the valve stem should be carefully measured, and positioning tools should be used to firmly clamp the workpiece during machining. 3. Pretreatment before processing. Before processing, clean and prepare the workpiece surface to ensure it is smooth, free of obvious defects and dirt, and take appropriate protective measures. 4. Process step by step. During drilling, the process should be carried out in stages rather than drilling through in one go, to prevent the drill bit from shifting or breaking. Additionally, pay attention to the use of coolant to maintain the drill bit in good condition. 5. Verification and correction. After processing is complete, measuring instruments should be used to check the diameter, depth, and eccentricity of the drilled holes, and corrections and adjustments should be made promptly to ensure they meet the required standards. .
This post was last edited by qwl on 2023-6-15 08:31. This counterbore is for drilling purposes. Center drilling for hole preparation is available without restrictions for drilling and reaming. The threads do not need to be smoothed.
“The “textbook” answer is out of touch with the actual situation.