In batch drilling, sometimes some holes on the workpiece positioning surface are processed and the machining accuracy is high. Therefore, the drilling template often uses the surface and the hole as a positioning reference to process the holes at other positions on the same side. group. However, when adopting this positioning method, if the positioning hole of the workpiece has the characteristics of large hole diameter and hole depth dimension, and comprehensively paying attention to the processing requirements of the hole group and the shape characteristics of the workpiece, the drill template can adopt the expansion spring at the same time. The positioning and clamping mechanism is taken into consideration. Such a clamp has a simple structure, is convenient to use, and has high positioning accuracy. This article has several main types
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