Installation method and structural parts of press-fit bushing

An installation method and bushing technology, applied in the field of material processing, can solve the problems of uneven distribution, unfavorable fatigue strength of through holes, etc., achieve uniform distribution, improve fatigue strengthening effect, and eliminate tangential residual tensile stress.

Active Publication Date: 2022-07-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, this method will make the tangential residual stress on the edge of the through hole unevenly distributed along the radial direction of the through hole, and the residual compressive stress on the edge of the through hole on the extrusion surface of the mandrel is often small and residual tensile stress appears. The fatigue strength of the through hole is unfavorable

Method used

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  • Installation method and structural parts of press-fit bushing
  • Installation method and structural parts of press-fit bushing
  • Installation method and structural parts of press-fit bushing

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Embodiment Construction

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0046] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, such as according to the direction of the example described. It will be appreciated that if the device of the icon is turned upside down, the components described as "on" will become ...

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Abstract

The present disclosure relates to an installation method and a structural member of a press-fit bushing. The installation method includes: providing a workpiece with a through hole; embedding the press-fit bushing in the through hole, and making the press-fit bushing The sleeve is in clearance fit with the through hole; the auxiliary bushing is placed in the press-fit bushing, and the auxiliary bushing is clearance-fitted with the press-fit bushing, and the wall of the auxiliary bushing is provided with a notch extending along its axial direction ; Under the condition that there is an interference between the diameter of the reinforcing rod and the inner diameter of the auxiliary bushing, use the reinforcing rod to extrude the auxiliary bushing, so that the auxiliary bushing exerts a pressing force on the pressing bushing, so that the pressing bushing Sleeves have an interference fit with through holes; remove reinforcing rods and auxiliary bushings. Installing the press-fit bushing by this method can make the tangential residual stress of the through hole wall of the workpiece evenly distributed in the axial direction, and can eliminate the tangential residual tensile stress at the extrusion end caused by the extrusion of the reinforcing rod, so that it can be Improve the fatigue strengthening effect of the hole, and further improve the fatigue life of the hole.

Description

technical field [0001] The present disclosure relates to the technical field of material processing, and in particular, to a method for installing a press-fit bushing and the [0002] Structure. Background technique [0003] At present, in the technical field of material processing, in order to install the press-fit bushing in the through hole of the workpiece, a method of directly extruding the press-fit bushing with a mandrel is generally adopted. However, this method will make the tangential residual stress at the edge of the through hole unevenly distributed along the radial direction of the through hole, and the residual compressive stress at the edge of the through hole on the extrusion surface of the mandrel is often small and residual tensile stress occurs, so that the Fatigue strength of through holes is disadvantageous. [0004] It should be noted that the information disclosed in the above Background section is only for enhancement of understanding of the backgr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P19/02
CPCB23P19/02
Inventor 闫五柱
Owner NORTHWESTERN POLYTECHNICAL UNIV
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