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Air cylinder cover bolt screwing process

A cylinder head and tightening tool technology, applied in the direction of manufacturing tools, wrenches, wrenches, etc., can solve the problem that the cylinder head bolts cannot accurately control the rotation angle of the cylinder head bolts, and achieve accurate rotation angle, simple operation and strong practicability. Effect

Active Publication Date: 2014-07-16
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a cylinder head bolt tightening process, thereby overcoming the disadvantage that maintenance personnel cannot accurately control the rotation angle of the cylinder head bolts when tightening the cylinder head bolts in the process of repairing the engine

Method used

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  • Air cylinder cover bolt screwing process
  • Air cylinder cover bolt screwing process

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Embodiment Construction

[0024] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0025] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0026] Such as figure 1 and figure 2 As shown, the cylinder head bolt head 1 is a hexagonal head, and its end face is a regular hexagon, because the angle between the two connecting lines connecting the center of the regular hexagon to the two endpoints of any hexagonal side 12 is α=60°, and The side edge 11 on the side of the hexagonal head corresponds to the end point of the hexagonal edge 12 of the regular hexagon on ...

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Abstract

The invention discloses an air cylinder cover bolt screwing process. The process includes the following steps: (1), pretightening, namely using a first screwing tool to enable pretightening moment of air cylinder cover bolts to become initial moment by tightening; (2), marking a starting point, namely selecting any side edge on an air cylinder cover bolt head as a rotating reference edge, and marking a rotating reference mark and a starting point mark on the side edge and a position, corresponding to the side edge, on the top surface of an air cylinder cover at the same time through a marking tool; (3), marking an end point, namely by taking the rotating reference edge as a starting point, calculating an end point position where the corresponding rotating reference edge is positioned after each air cylinder cover bolt is screwed, and marking an end point mark at a corresponding position on the top face of the air cylinder cover; (4), tightening, namely screwing the air cylinder cover bolts through a second screwing tool to enable the rotating reference edges of the air cylinder cover bolts to rotate to positions corresponding to the end point marks. The air cylinder cover bolt screwing process is accurate in rotating angle, needless of other detecting and measuring tools, simple in operate and high in practicability.

Description

technical field [0001] The invention relates to the field of installation of engine cylinder heads, in particular to a cylinder head bolt tightening process. Background technique [0002] Cylinder head bolts are one of the most important bolts in the engine. The tightness of the cylinder head bolts not only affects the sealing of the cylinder head gasket, but also directly affects the reliability and durability of the engine. The currently commonly used tightening methods for cylinder head bolts are the torque method and the rotation angle method. The torque method is to tighten the cylinder head bolts to the set torque by tightening tools or tightening equipment. The rotation angle method is to use tightening tools or tightening equipment to tighten the cylinder head bolts to the initial torque, and then tighten them to a certain angle, which is the rotation angle. The initial torque and the size of the rotation angle of the cylinder head bolts tightened by the rotation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B13/00
CPCB25B13/00
Inventor 韦明全杨仕明杨剑峰吴子乔黄建忠甘锋刘明林梁天兵梁伟志黄柏梨赵坚
Owner GUANGXI YUCHAI MASCH CO LTD
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