Punched point anti-loosening method for sunk screw connection

A technology of countersunk head screws and punching points, applied in the directions of screws, connecting members, nuts, etc., can solve the problems of poor anti-loosening effect of connecting punching points and so on.

Inactive Publication Date: 2012-11-07
XIAN AVIATION BRAKE TECH
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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 poor anti-loosening effect of connection punching points in the prio...

Method used

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  • Punched point anti-loosening method for sunk screw connection
  • Punched point anti-loosening method for sunk screw connection
  • Punched point anti-loosening method for sunk screw connection

Examples

Experimental program
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Effect test

Embodiment 1

[0021] This embodiment is a punching point anti-loosening method for countersunk screw connection. The connected part 1 is a steel piece, and the connected part 1 is provided with a 90° countersunk screw hole 5 . In specific implementation:

[0022] Step 1, prefabricated punching holes. On the edge of the circumference of the countersunk screw hole 5, there are 2 to 4 circular punching holes 3 processed by machining, and the diameter of the punching holes 3 is 1.2 mm to 2.5 mm. The punching holes 3 are evenly distributed on the edge of the circumference of the countersunk screw holes 5 . The centerline of the punching hole 3 is parallel to the centerline of the countersunk screw hole 5 . In this embodiment, there are three punching holes 3; the diameter of the punching holes is 2 mm, and the depth is 1.5 mm.

[0023] Step 2, assemble the connectors. Align the countersunk screw hole 5 on the connected part 1 with the countersunk screw hole on the product base 2 . Insert th...

Embodiment 2

[0026] This embodiment is a punching point anti-loosening method for countersunk screw connection. The connected part 1 is a steel piece, and the connected part 1 is provided with a 90° countersunk screw hole 5 . In specific implementation:

[0027] First, 2 to 4 V-shaped punching grooves 6 are machined on the edge of the countersunk screw hole 5 opening circumference. The width of the punching groove notch is 2 mm to 3 mm, and the V-shaped apex of the punching groove The angle between them is 60°, and the bisector of the top angle is perpendicular to the circumference of the countersunk screw hole 5 . The punching point grooves 6 are evenly distributed on the periphery of the countersunk screw hole 5 opening circumference. The angle bisector of the V shape of the punching point groove 6 is perpendicular to the center line of the countersunk screw hole 5 . In this embodiment, there are four punching grooves 6 with a width of 3 mm and a depth of 1.5 mm, which are evenly distr...

Embodiment 3

[0031] This embodiment is a punching point anti-loosening method for countersunk screw connection. The connected part 1 is a steel piece, and the connected part 1 is provided with a 90° countersunk screw hole 5 . In specific implementation:

[0032] First, 2 to 4 conical punching holes 3 are machined on the edge of the countersunk screw hole 5 opening circumference. The diameter of the punching hole opening is 2 mm to 3 mm, and the cone angle of the punching hole 60°, and the centerline of the punch hole is parallel to the centerline of the countersunk screw hole 5. The punching holes 3 are evenly distributed on the edge of the circumference of the countersunk screw holes 5 . In this embodiment, there are four punching holes 3 with a diameter of 3 mm and a depth of 1.5 mm, which are evenly distributed along the circumference of the countersunk screw holes 5 .

[0033] Align the countersunk screw hole 5 on the connected part 1 with the countersunk screw hole on the product ba...

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Abstract

Provided is a punched point anti-loosening method for sunk screw connection. 2-4 punched point grooves or punched point holes are formed on the circumferential edge of the opening of a sunk screw hole by mechanical processing, the width or diameter of the opening of the punched point groove or punched point hole is 1.2mm-2.5mm, the punched point grooves or punched point holes are evenly distributed on the circumferential edge of the opening of the sunk screw hole, and the central line of the punched point groove or punched point hole is perpendicular to the central line of the sunk screw hole. In connection, a punch is abutted against the part of the screw head of the sunk screw opposite to the punched point groove or punched point hole prefabricated on the edge of a sunk screw hole in a to-be-connected member, and a punching tool is hit, so that the screw head of the sunk screw deforms to get squeezed into the punched point groove or punched point hole prefabricated on the edge of the sunk screw hole in the to-be-connected member, therefore achieving the purpose of mechanical motion stop and loosening prevention for screw. The inventive method has the characteristics of simple and easy operation, reliable screw loosening prevention, and wide application. The punched point groove or punched point hole is round, V-shaped or conical.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a threaded connection anti-loosening method. Background technique [0002] Threaded connection is a connection and fixing method commonly used in mechanical design and manufacture. However, as the service time increases, especially under vibration, shock and other operating conditions, the threaded connection will gradually loosen or the bolts and screws will withdraw, reducing the reliability of the connection. In order to ensure the reliability of threaded connections, various anti-loosening measures are available in mechanical design, and punching points after bolts and screws are installed is one of the anti-loosening methods. This method is simple and easy to implement, and has a certain anti-loosening effect. However, it has been found that for steel parts connection, the anti-loosening effect of countersunk head screws (usually 90°) is not very ideal, because for this structure, t...

Claims

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Application Information

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IPC IPC(8): F16B39/02
Inventor 何永乐乔勇
Owner XIAN AVIATION BRAKE TECH
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