Technology for controlling coaxiality precision of U-shaped support combination

A technology of precision control and bracket group, which is applied in the field of coaxial precision control process of step holes at both ends of U-shaped brackets, can solve the problems of increasing installation error, reducing machining accuracy, and low machining accuracy, so as to reduce installation error and provide Processing accuracy, the effect of high processing accuracy

Inactive Publication Date: 2014-05-07
HEBEI HANGUANG HEAVY IND
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Problems solved by technology

[0003] In the original processing method, the bottom surface B is used for positioning, and the workpiece is processed standing up. The distance between the processing part and the positioning surface is high, the stability of the workpiece is poor, and the rigidity is low, resulting in low processing accuracy; the processing cannot be completed in one positioning installation, which increases the installation error and reduces the processing accuracy.

Method used

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  • Technology for controlling coaxiality precision of U-shaped support combination

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] The present invention comprises the following steps: 1), during casting, add five process tables for positioning during processing on the side of the part, four of which are 20x20 square; 2.

[0019] 2) Each processing surface is rough processed, and each size is reserved. The fitter shovels, repairs and polishes each non-processed surface to be smooth.

[0020] 3) Carry out heat treatment - low temperature aging treatment to remove the processing stress generated by a large number of processing.

[0021] 4) For the surface A of fine milling process, leave the scraping amount, the fitter finely scrapes and grinds this surface, and the flatness is not greater than 0.01mm.

[0022] 5) With the craft table A as the base surface, the amount of the milling surface B is positioned at one time, the semi-finish boring φc is used for positioning with p...

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Abstract

The invention relates to a technology for controlling the coaxiality precision of a U-shaped support combination. The technology comprises the first step of casting; the second step of rough machining; the third step of heat processing; the fourth step of finish-milling of a technology platform top A and fine scraping of the technology platform top A through a bench worker, wherein the flatness is not more than 0.01 mm; the fifth step of positioning a milling face B allowance at a time with the technology platform face A as a cardinal plane and enabling the precision of a half schlichtaufbohren phi c to be H7 for positioning; the sixth step of surface coating; the seventh step of finish-scraping of the technology platform top A, wherein the flatness is not more than 0.01 mm; the eighth step of installing a left bearing base and a right bearing base into a support, fastening a screw and screwing a pin; the ninth step of finishing machining; the tenth step of removing a technology platform.

Description

technical field [0001] The invention relates to a coaxiality precision control process, in particular to a coaxiality precision control process for machining step holes at both ends of a U-shaped bracket. Background technique [0002] In some mechanisms that require pitch rotation, U-shaped brackets are generally used as load supports, especially for some optoelectronic products that need to achieve high-precision tracking, which requires that the bearing housings with bearings installed at both ends of the U-shaped bracket have very high coaxiality accuracy. high. [0003] In the original processing method, the bottom surface B is used for positioning, and the workpiece is processed standing up. The distance between the processing part and the positioning surface is high, the stability of the workpiece is poor, and the rigidity is low, resulting in low processing accuracy; the processing cannot be completed in one positioning installation, which increases the installation e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 张求红赵燕明丁雪峰
Owner HEBEI HANGUANG HEAVY IND
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