Problems needing attention when using gun drill
Time：
May 05,2022
The clamping of the workpiece must be safe and reliable, and coaxial with the center of the machine tool. The outer circle and end face of the workpiece can be processed, and at least the positioning surface must be turned out.
1. The clamping of the workpiece must be safe and reliable, and coaxial with the center of the machine tool. The outer circle and end face of the workpiece can be processed, and at least the positioning surface must be turned out.
2. When machining long workpieces, the workpieces and gun drills should use fixed center frames. In addition, the drill pipe also needs 1-3 mobile support frames.
3. The center hole on the workpiece must be smaller than the diameter of the gun drill. If the size of the center hole cannot be reduced, special guide sleeve can be used.
4. When starting drilling, the guide drill sleeve must be used. The inner diameter of the drill sleeve matches the diameter of the drill bit. The inner diameter of the drill sleeve should be ground to IT6. When the workpiece is short or the hole straightness requirement is not high, the guide hole can also be pre-drilled on the workpiece to guide.
5. The drill sleeve is a vulnerable part. When the inner diameter of the drill sleeve is worn more than 0.02mm, the drill sleeve should be replaced. It is better to use the cemented carbide drill sleeve. Shaanxi Jinshi Machinery deep-hole drill, and the basic material of the drill sleeve is cemented carbide.
6. See the following table for common problems and causes in gun drill processing
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