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Process for controlling deformation of axle-hung box of locomotive

An axle-holding box and process technology, applied in the field of locomotive axle-holding box processing, can solve the problems of poor machining accuracy and difficult processing of the axle box, and achieve the effects of ensuring quality, eliminating blanks, and reducing tooling deformation.

Active Publication Date: 2013-04-17
CRRC QISHUYAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of difficult processing and poor machining accuracy of the existing axle-holding boxes, the present invention provides a process for controlling the deformation of the axle-holding boxes of locomotives

Method used

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  • Process for controlling deformation of axle-hung box of locomotive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Steel casting blank: the axle holding box is a steel casting blank, and the overall steel casting blank is prepared, with a mass of 150Kg;

[0031] 2. Blank scribing: marking processing calibration datum line and rough machining surface and hole processing line: bearing holes and end faces at both ends of the shaft holding box, outer arc, upper mounting surface, lower mounting surface and inner opening at both ends;

[0032] 3. Rough machining of the blank: machining the bearing holes and end faces, the upper mounting surface, the lower mounting surface, the outer arcs at both ends, the left and right sides, and the inner openings at both ends of the shaft holding box;

[0033] 4. Defect welding repair: Welding repair is required for casting defects exposed after rough machining, such as shrinkage cavity, looseness, and insufficient processing allowance due to deformation;

[0034] 5. Artificial aging: conduct heat treatment on the rough-machined axle box with a...

Embodiment 2

[0053] 1. Steel casting blank: the axle holding box is a steel casting blank, and the overall steel casting blank is prepared, with a mass of 230Kg;

[0054] 2. Blank scribing: marking processing calibration datum line and rough machining surface and hole processing line: bearing holes and end faces at both ends of the shaft holding box, outer arc, upper mounting surface, lower mounting surface and inner opening at both ends;

[0055] 3. Rough machining of the blank: machining the bearing holes and end faces, the upper mounting surface, the lower mounting surface, the outer arcs at both ends, the left and right sides, and the inner openings at both ends of the shaft holding box;

[0056] 4. Defect welding repair: Welding repair is required for casting defects exposed after rough machining, such as shrinkage cavity, looseness, and insufficient processing allowance due to deformation;

[0057] 5. Artificial aging: conduct heat treatment on the rough-machined axle box with a...

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Abstract

The invention relates to the technical field of processing of an axle-hung box of a locomotive, in particular to a process for controlling the deformation of the axle-hung box of the locomotive. The process comprises the following steps of: (1) performing rough machining on a cast steel blank; (2) performing fine machining on the cast steel blank; and (3) checking and storing into a storehouse: a, removing burrs and detecting flaws, b, measuring by using a three-dimensional coordinate, c, manually checking, and d, coating the surface and storing into the storehouse. By the process, burrs, a welding stress and a rough machining stress on thin-wall parts of the cast steel which are easy to deform are eliminated as much as possible; meanwhile, the machining sequence is arranged rationally; afixture is designed and used and a positioning and clamping point is set rationally, so the deformation of the fixture is reduced; and interference and influence of various factors on key elements can be eliminated by the final fine machining. The process guarantees the machining precision and the quality of a product.

Description

technical field [0001] The invention relates to the technical field of locomotive axle box processing, in particular to a process for controlling the deformation of the locomotive axle box. Background technique [0002] The axle-holding box is cast steel rough, weighing about 210kg. The structure is special, the middle is an open semi-circular structure, the thickness of the semi-circular wall is only 12mm, the rigidity is poor, and it is easy to deform; the processing technology is poor, and the clamping is difficult; the rough casting defects exposed after rough machining need to be repaired by welding, and there are processing stress and welding stress . One end of the bearing hole needs to be inlaid with a stop ring, and the interference is 0.10~0.2mm, which will cause the deformation of the axle box and make it difficult to guarantee the machining accuracy. Contents of the invention [0003] In order to overcome the disadvantages of difficult processing and poor mac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 路亚光
Owner CRRC QISHUYAN CO LTD
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