a positioning method

A positioning method and a technology of positioning blocks, which are applied in the direction of manufacturing tools, grinding machine parts, grinding/polishing equipment, etc., can solve problems such as scrapping, difficult processing, and parts that cannot be processed down to ensure the size and position Accuracy requirements, good benchmark consistency, and the effect of reducing benchmark errors

Active Publication Date: 2021-08-17
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If an unreasonable benchmark is selected, the machining process of the part will not only become difficult, but also may cause the part to be scrapped because it cannot be processed down

Method used

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment, but should not be interpreted as that the scope of the subject matter of the present invention is only limited to following embodiment, under the situation of not departing from above-mentioned technical thought of the present invention, all according to this field Various modifications, substitutions and alterations made by ordinary technical knowledge and common means are included in the scope of the present invention.

[0032] A positioning block and a positioning method for a casting including a boss and a hole on the boss are implemented according to the following steps:

[0033] 1) if figure 1 As shown, analyze whether the selection of the design datum and the machining datum will use the hole on the boss and the upper end surface of the boss, and if it will use the hole on the boss and the upper end surface of the boss, consider designing the po...

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Abstract

The invention discloses a positioning method. The positioning block includes a reference plane used for alignment and positioning, the area of ​​the reference plane is larger than the upper end surface of the boss, and a connection surface used for close connection with the upper end surface of the boss. There is an interval between the connection surface and the reference surface, and the connection surface is connected with a threaded rod, and a nut and a washer are detachably connected to the threaded rod. When positioning, the positioning block is connected with the hole on the boss, so that the upper surface of the boss is extended and enlarged, and this surface is used as a new alignment and positioning reference plane. The invention reduces the reference error and ensures the size and position accuracy requirements of parts processing.

Description

technical field [0001] The invention is suitable for machining alignment and positioning of jet nozzle precision castings of aero-engines, overcomes the disadvantage of inaccurate positioning caused by too small positioning reference in conventional machining, and belongs to the technical field of machining. Background technique [0002] In the aviation industry, nozzle precision castings have a boss structure. These bosses are often the key structures for assembly connections. The structure includes the boss itself and the holes on the boss. Often in the processing arrangement of the parts, the boss Both the hole and the hole will be used as the alignment and positioning datum of the machined parts. If a reasonable benchmark is selected, the machining process of the part will become very smooth, and the size and shape and position tolerances will be easy to control. If an unreasonable benchmark is selected, the machining process of the part will not only become difficult, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B41/06B24B41/00B24B1/00
CPCB24B1/00B24B41/00B24B41/06
Inventor 金鑫福黄德敏余勇刘志刚段国齐韩伦珍周新斌
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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