High-efficiency unequal multi-blade expanding reamer

Abstract

The invention discloses a high-efficiency unequal multi-blade expanding reamer, and belongs to the technical field of reamers. The multi-edge reamer comprises a reamer handle and a cutting part, the cutting part is provided with a plurality of spiral cutting edges distributed in the circumferential direction, and in the cross section of the cutting part, the difference between the maximum tooth pitch included angle between two adjacent cutting edges and the minimum tooth pitch included angle between two adjacent cutting edges ranges from 6 degrees to 9 degrees; and the tooth width of each cutting edge and the tooth pitch included angle in the rear side in the rotary cutting direction of the cutting edge satisfy corresponding change rules. By adopting the design of combining multi-blade unequal division with multi-blade unequal teeth, the surface roughness and cylindricity of a machined hole are improved, the reaming allowance and cutting efficiency can be improved, and the intermittentand efficient finish machining requirements of a (deep) hole are met; the front end of the multi-edge reamer is of a layered structure, the machining allowance is increased, the machining reliabilityof the reamer is enhanced, chips can be broken and small, cleaning of the chips in a hole is facilitated, and the multi-edge reamer is particularly suitable for multi-channel interrupted hole machining.

Description

technical field [0001] The invention relates to a machining tool, more specifically, to a high-efficiency unequal multi-edged reamer. Background technique [0002] In the process of machining, the processing of various holes is often encountered, and hole processing is also a very common processing method. According to different processing methods, hole processing usually includes drilling, reaming, countersinking and reaming, etc. The characteristics of the tools used in different processing methods are also different. Reaming is to use a reamer to remove trace metal layers from the hole wall of the workpiece. A method to improve its dimensional accuracy and hole surface quality. Reaming is one of the finishing methods of holes and is widely used in production. The main tool for reaming is the reamer. Most of the reamer structure is composed of a working part and a handle. The working part mainly performs cutting and alignment functions. According to the shape of the toot...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the existing reamer, and to provide a high-efficiency unequal multi-edged reamer. By adopting the technical solution of the present invention, the multi-edged reamer has a The difference between the maximum and minimum pitch angles between two adjacent cutting edges is 6° to 9°, and the tooth width of each cutting edge is the same as the tooth pitch angle on the rear side of the cutting direction of rotation of the cutting edge The size has a corresponding change rule. The larger the tooth pitch angle on the rear side of the rotating cutting direction of each cutting edge, the larger the tooth width of the cutting edge. The above-mentioned multi-blade unequal design combined with multi-blade unequal teeth design greatly reduces The vibration of the tool in the reaming process is reduced, which not only improves the surface roughness and cylindricity of the processed hole, but also improves the machining allowance and cutting efficiency of the reaming hole, and greatly improves the processing efficiency of the reaming hole, especially for deep holes and deep holes. Intermittent high-efficiency finishing of holes is required; in addition, the front end of the multi-blade reamer adopts a layered structure, which expands the machining allowance, enhances the processing reliability of the reamer, and can make the chips form small chips, which is convenient The chip cleaning in the hole is especially suitable for multi-channel intermittent hole processing, which effectively solves the problem of chip residue blocking the hole

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