Manual threaded hole tapping tool and method

Abstract

The invention discloses a manual threaded hole tapping tool. The manual threaded hole tapping tool comprises a positioning block and a limiting sleeve assembly, and a guide hole in clearance fit withan outer circle of a screw tap is formed in the center of the positioning block; the limiting sleeve assembly is fixed to the upper portion of the screw tap, an elastic chuck of the limiting sleeve assembly is embedded into an inner clamping sleeve, the conical surface of an inner hole of the inner clamping sleeve abuts against the outer conical surface of the elastic chuck, and an outer sleeve and the inner clamping sleeve are connected into a whole through threads; and the upper part of the screw tap is inserted and fixed in an inner hole of the elastic chuck, the lower end of the screw tappenetrates through the guide hole, and the limiting sleeve assembly is fixed to the upper portion of the screw tap. The method comprises the steps that (1) the limiting sleeve assembly is fixed to theupper portion of the screw tap; and (2) the screw tap penetrates through the positioning block to be tapped into a bottom hole. The device is simple in structure and convenient and easy to operate, it is guaranteed that the axis of a tapped threaded hole is perpendicular to a base face of a part, the tapping quality is greatly improved, the tapping depth meets the required depth requirement, andthe defect of thread damage is avoided.

Description

technical field [0001] The invention relates to a tapping tool and method for threaded holes of mechanical parts, in particular to a fitter manual tapping tool and method, and belongs to the technical field of fitters. Background technique [0002] The threaded hole realizes the fixed connection between the mechanical parts through the screw screwed into it, and its quality directly affects the overall performance and service life of the machine. At present, the fitter's manual tapping thread still occupies a certain position in machining. In actual production, it is often encountered that some threaded holes are not suitable for machine tapping due to the limitation of the location or the shape of the part, and manual tapping (also known as tapping) must be used. In addition, when the diameter of the threaded hole is less than 8mm, the strength of the tap is low, and it is easy to break when tapping the thread, so manual tapping is often used. The fitter usually uses a ta...

AI Technical Summary

Problems solved by technology

Due to the uneven technical level of fitters, it is difficult to ensure the depth and verticality of the thread when manually tapping the thread. Usually, the tap is tapped until the bottom of the hole cannot be tapped.

In addition, there is also the problem that the thread is easy to rot and fail, which makes it difficult to screw in the screw.

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