Drilling and reaming combined cutter

Abstract

The invention discloses a drilling and reaming combined cutter which comprises a drill bit and a reamer bit, wherein a tapered rod is arranged at the tail part of the drill bit, the reamer bit is a taper reamer bit, a center hole which is a through hole is formed in the position of the central shaft of the taper reamer bit, a center hole in the tool shank part of the taper reamer bit is a round straight hole, a center hole in the cutting edge part of the taper reamer bit is a conic hole, the conic hole is matched with a conical surface corresponding to the tapered rod at the tail part of the drill bit, the contact area matched with the conical surface is not less than 90 percent of a matching surface. According to the invention, one-step taper hole forming is achieved, a cutter is not required to be replaced, the machining precision is improved, the labor intensity is lowered, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of machining tools, in particular to a drill-reamer compound tool for machining tapered holes. Background technique [0002] The method of mechanical manufacturing and processing taper holes generally adopts the method of drilling and reaming. Drilling first and then reaming requires two tool replacements. This not only increases the clamping error, but also has high labor intensity and low production efficiency. On the other hand, the position of the hole processed by the reamer is greatly affected by the previous process, so the processing method of drilling first and then reaming has large errors, and the accuracy is not easy to control. Contents of the invention [0003] The invention provides a drill-reamer compound tool for processing taper holes, which can form the taper hole at one time without changing the tool, which not only improves the processing accuracy, but also reduces labor intensity and ...

AI Technical Summary

Problems solved by technology

[0002] The method of machining taper holes in mechanical manufacturing generally adopts the method of drilling and reaming. Drilling first and then reaming requires two tool replacements. This not only increases the clamping error, but also has high labor intensity and low production efficiency.

On the other hand, the position of the hole processed by the reamer is greatly affected by the previous process, so the processing method of drilling first and then reaming has large errors, and the accuracy is not easy to control

Images