Combined reamer

Abstract

The invention relates to a combined reamer which comprises a connecting rod, wherein the upper end of the connecting rod is conical, the middle of the connecting rod is provided with a first external thread part and the lower end of the connecting rod is provided with an axial concave hole. Axial protrusion parts are arranged on the edge of the lower end of the connecting rod, and a threaded hole is formed in the side wall of the axial concave hole. The combined reamer further comprises a connecting sleeve connected with the connecting rod, an annular boss is arranged on the outer wall of the connecting sleeve, and a second external thread part is arranged on the outer wall of the boss. The combined reamer further comprises a sleeve connected with the connecting sleeve, and an annular flange is arranged at the lower end of the inner wall of the sleeve. The combined reamer further comprises a positioning sleeve arranged in the sleeve in a penetrating mode, an annular flange is arranged at the upper end of the outer wall of the positioning sleeve, and an axial long-strip-shaped hole is further formed in the side wall of the positioning sleeve. The combined reamer further comprises a reamer head, a pin and a fastening bolt. Notches are formed in the top of the reamer head and matched with the protrusion parts, a shaft hole is formed in the center of the reamer head, the pin is inserted into the shaft hole, and an inclined plane is arranged on the outer wall of the top of the pin. The fastening bolt sequentially penetrates through the long-strip-shaped hole and the threaded hole, and the end of the fastening bolt abuts against the inclined plane.

Description

technical field [0001] The invention belongs to the technical field of machining equipment, in particular to a combined reamer. Background technique [0002] A reamer is a rotary tool with one or more teeth used to remove a thin layer of metal on the surface of a machined hole, a rotary finishing tool with a straight or helical edge, and used for reaming or repairing a hole. Existing reamers are generally independent entities, that is, each reamer has a fixed size, and holes with fixed sizes and specifications are processed. Usually, different workpieces have holes with completely different specifications, and the openings of the holes also have different size requirements according to actual installation needs. Such as figure 1 The workpiece structure shown is the low-noise intermediate of the oil pump, and the end openings of the side oil ports on both sides have complex structures and precision requirements: from the outside to the inside, the angle is 15±1° The outer ...

AI Technical Summary

Problems solved by technology

This kind of processing method is not only low in processing efficiency, but the more important problem is that the two processings usually cannot guarantee accurate concentricity, resulting in deviation between the inner port and the outer port, which affects subsequent use

If a special reamer is equipped for each size of the break, not only the cost is uneconomical, but also the repeated operation of changing the reamer will seriously affect the processing efficiency and effect

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