A drilling marking device

Abstract

The invention discloses a hole drilling marking device which comprises four supporting legs. The four supporting legs form a square frame. Skirt strips are arranged between adjacent supporting legs. Strip-shaped through holes with the same height and the same length are formed in each skirt strip. A cross measuring scale is arranged by penetrating through the strip-shaped through holes. The cross measuring scale is formed by four measuring scales, and each measure scale penetrates through one strip-shaped through hole. A sleeve is arranged in the vertical direction in the center position of the cross measuring scale. A movable locating cone is arranged in the sleeve. Compared with the prior art, according to the hole drilling marking device, a pre-drilling hole can be formed on a machining piece at the front line for drilling machine hole drilling, one-time center aligning can be convenient when a drilling machine carries out hole drilling on the machining piece, deviating of drilling machine hole drilling is avoided, and shock generated by drill bit reverse locating when a drill bit of the drilling machine is just in contact with the machining piece is avoided.

Description

technical field [0001] The invention relates to a drilling marking device. Background technique [0002] In industrial production, the drilling machine is an indispensable processing machine tool. Drilling machines often need to clamp and drill some small and medium-sized parts, and ream threads. In processing, some heat-treated workpieces have very high surface hardness. Ordinary alloy drills It will be very troublesome when drilling. The general processing steps are to draw the center point on the workpiece with a marking pen, then clamp the workpiece, reverse the machine tool drill bit to align with the center point and grind until the center point is ground out. It is called the obvious groove, and finally turn the drill bit forward to drill the groove. [0003] However, in actual operation, it will be found that if the workpiece with marked points is directly reversed to dig the groove, the groove will often be drilled off. Once the groove is drilled off, it will be di...

AI Technical Summary

Problems solved by technology

[0003] However, in actual operation, it will be found that if the workpiece with marked points is directly reversed to dig the groove, the groove will often be drilled off. Once the groove is drilled off, it will be difficult to re-align it, which will affect the hole accuracy Accuracy, and the use of the drill bit to dig grooves in reverse will increase the wear of the drill bit, which will cause the drill bit to break easily in the normal drilling afterwards, causing unnecessary troubles. This has existed for a long time and there has been no better one. Solutions to operational problems

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