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Method for bushing repairing of thread hole

A technology of threaded holes and inserts, which is applied in the field of mechanical parts repair and treatment, to achieve the effects of preventing misalignment, improving integrity and strong applicability

Active Publication Date: 2019-03-26
DEYANG DONGQI POWER STATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention proposes a method for repairing threaded holes with inserts, the purpose of which is to solve the problems of the existing methods for repairing threaded holes with inserts, prevent the threaded sleeve from loosening, and improve the airtightness and shock resistance of the workpiece. Properties and pullout properties

Method used

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  • Method for bushing repairing of thread hole
  • Method for bushing repairing of thread hole
  • Method for bushing repairing of thread hole

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A method for repairing threaded blind holes with inserts, comprising the steps of:

[0041] S1. Reaming and eliminating defects: expand the threaded hole A2 to be repaired to the pre-designed insert size, eliminate the defective part, and spot-face a 30° chamfer 3 on the top edge of the threaded hole A2;

[0042] S2. Preparation of filling parts: select the same or similar material as the base metal 1, and turn out bolts suitable for the threaded hole A2;

[0043] S3. Filling the threaded hole: apply high-strength thread-locking glue on the periphery of the bolt, and then assemble it into the threaded hole A2;

[0044] S4. Welding: Weld the bolt at the chamfer 3 according to the welding parameters, and weld the chamfer 3 to the full, and control the welding deformation during the welding process;

[0045] S5. Initial leveling: milling off the part of the filling part 4 that exceeds the surface of the base material 1, and reserve a margin for subsequent processes;

[0...

Embodiment 2

[0054] A method for repairing threaded blind holes with inserts, comprising the steps of:

[0055] S1. Reaming and eliminating defects: expand the threaded hole A2 to be repaired to the pre-designed insert size, eliminate the defective part, and spot-face a 60° chamfer 3 on the top edge of the threaded hole A2;

[0056] S2. Prepare filler: select the same or similar material as the base material 1, and turn out filler 4 that is compatible with the threaded hole A2;

[0057] S3. Filling the threaded hole: apply high-strength thread-locking glue on the 4 sides of the filler, and then assemble it into the threaded hole A2;

[0058] S4. Welding: welding the filler 4 at the chamfer 3 according to the welding parameters, and welding the chamfer 3 completely, and controlling the welding deformation during the welding process;

[0059] S5. Initial leveling: milling off the part of the filling part 4 that exceeds the surface of the base material 1, and reserve a margin for subsequent ...

Embodiment 3

[0066] A method for repairing threaded blind holes with inserts, comprising the steps of:

[0067] S1. Reaming and eliminating defects: expand the threaded hole A2 to be repaired to the pre-designed insert size, eliminate the defective part, and spot-face a 45° chamfer 3 on the top edge of the threaded hole A2;

[0068] S2. Prepare filler: select the same or similar material as the base material 1, and turn out filler 4 that is compatible with the threaded hole A2;

[0069] S3. Filling the threaded hole: apply high-strength thread-locking glue on the 4 sides of the filler, and then assemble it into the threaded hole A2;

[0070] S4. Welding: welding the filler 4 at the chamfer 3 according to the welding parameters, and welding the chamfer 3 completely, and controlling the welding deformation during the welding process;

[0071] S5. Initial leveling: milling off the part of the filling part 4 that exceeds the surface of the base material 1, and reserve a margin for subsequent ...

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Abstract

The invention discloses a method for bushing repairing of a thread hole, and belongs to the technical field of mechanical part repairing treatment. The method comprises following steps that S1, chambering for defect removing is achieved, the thread hole A to be repaired is chamfered to the pre-designed bushing size, the defect part is removed, a 30 to 60-degree chamfer is reamed on the edge opening part of the thread hole A; S2, a filling part is prepared, a material the same with or similar to base metal is selected, and a filling part matched with the thread hole A is turned; S3, the threadhole is filled; S4, welding is carried out, according to the welding parameters, the filling part is welded on the chamfering part, full welding chamfering is carried, and in the welding process, welding deforming is controlled; S5, primary leveling is carried out; S6, a set screw is assembled; S7, secondary leveling is carried out; and S8, trepanning is carried out. The method has the beneficialeffects that thread deforming of a new thread hole in the assembling process can be avoided, an original bolt can be still used, the detaching of the original size can be kept, the workpiece integration is improved, and the anti-vibration property and the anti-tensile property of a workpiece are optimized.

Description

technical field [0001] The invention belongs to the technical field of repairing and processing of mechanical parts, and in particular relates to a method for repairing threaded holes with inserts. Background technique [0002] Damage to threaded holes mostly occurs on basic (shell) parts made of high-strength bolts such as cast iron, cast aluminum, and cast copper. Frequent disassembly and assembly cause the inner wall of the hole to be strained, or improper fastening and excessive local force cause damage to the thread teeth. These parts cannot work normally after the thread is damaged. It is not economically feasible to scrap an important component because of a rotten thread in a threaded hole, and it is generally necessary to repair the rotten thread. [0003] At present, for the damage problem that often occurs in the process of processing and using threaded holes, because the defective part is not conducive to welding operation, and the weld seam hardness is high afte...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 宋小东
Owner DEYANG DONGQI POWER STATION EQUIP
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