Device for heating inner holes of workpieces in interference fit

Abstract

The invention provides a device for heating inner holes of workpieces in interference fit. The device for heating the inner holes of the workpieces in the interference fit comprises a heating barrel used for being in contact with the inner hole walls of the workpieces for heating, the heating barrel comprises more than two separable heating barrel sections, and the heating barrel is provided with an expansion driving device for driving all the heating barrel sections to expand and move outwards in a matched mode, so the heating barrel can be adapted to the inner holes of the workpieces with different inner diameters or with the inner diameters enlarged after heating. Thus, the heating process and configuration before traditional interference fit workpieces are assembled are broken through, especially for the application of the interference fit on large-scale workpieces, the expansion driving device can drive all the heating barrel sections to expand outwards properly according to the size of the inner holes of the workpieces so as to be suitable for the inner holes with the different inner diameter sizes and with the inner diameters enlarged gradually after heating, and effective heating type contact with the inner hole walls of the workpieces can be maintained continuously. Compared with the prior art, the device for heating the inner holes of the workpieces is high in adaptability, high in heating efficiency, novel and reasonable in structure and high in practicability.

Description

technical field [0001] The invention relates to the field of heating tools for interference fit workpieces, in particular to a heating device for interference fit inner holes of workpieces. Background technique [0002] At present, in the field of mechanical processing, in order to realize the fast connection between mechanical parts, the method of interference fit connection is usually used instead of welding. Interference fit means that the actual size of the shaft is larger than the actual size of the hole, and there is a certain amount of interference after assembly, and there is no relative movement between the two parts. The assembly methods of interference fit parts generally include press fitting, hot fitting and cold fitting. The press-fitting method is divided into hammering method and press assembly. When the interference is small, the hammering method is used, and when the interference is slightly large, the press is used. When the interference is large, the ho...

AI Technical Summary

Problems solved by technology

This kind of heating device cannot be adjusted according to the size of the inner hole of the workpiece to be heated during actual use, especially when the interference fit of a large interference fit workpiece is performed, it cannot be adjusted according to the inner hole of the workpiece with different inner diameters, or when it is gradually heated During the process, the inner hole of the workpiece whose inner diameter is gradually increased is adjusted adaptively, resulting in the inability to make effective heating contact with the inner hole of the workpiece, which seriously affects the heating efficiency, and the practicability needs to be improved.

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