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Method for increasing dismounting and mounting frequency of AlSiC thread hole

A technology of threaded holes and times, applied in the direction of threaded fasteners, nuts, connecting components, etc., can solve the problems of low anti-disassembly times of aluminum alloy screw holes, threaded sleeves falling off or slipping out, and low strength of aluminum materials. The effect of high reliability, improved reliability and high strength

Active Publication Date: 2019-08-02
镇安明科电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of aluminum is low, and the number of disassembly and assembly resistance of aluminum alloy screw holes is low (the number of disassembly and assembly resistance of M3 screw holes is generally less than 10 times, and the torque used is 3N m), and the screw teeth are in the process of disassembly and assembly. Very fragile
The traditional method of strengthening aluminum alloy threaded holes is to embed steel wire threaded sleeves in the threaded holes, but this method is often used or improper force during the screwing process will cause the threaded sleeves to fall off or slip out

Method used

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  • Method for increasing dismounting and mounting frequency of AlSiC thread hole
  • Method for increasing dismounting and mounting frequency of AlSiC thread hole
  • Method for increasing dismounting and mounting frequency of AlSiC thread hole

Examples

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Embodiment 1

[0040] A method to increase the number of disassembly and assembly of threaded holes of AlSiC parts. When processing titanium alloy inserts, the structure of the inserts is as follows figure 1 As shown in (a), the shape is conical, with a taper of 6°, which limits its degree of freedom in the Z-axis direction. A plane is reserved on the side to limit its degree of freedom in the XY direction. Partial teeth are reserved on the side to ensure its mechanical locking with aluminum.

[0041] The minimum size of the small head of the inlay is 5mm, and the pre-tapping thread cannot exceed M3 to ensure that the thread structure is on the inlay.

[0042] When processing silicon carbide ceramics, a reserved hole is reserved in advance, and the shape of the inner hole is consistent with the shape of the insert, such as figure 1 As shown in (b), ensure that the matching gap between the inlay and the ceramic reserved hole is 0mm.

[0043] Then the mold is impregnated. During the mold load...

Embodiment 2

[0046]The principle of this embodiment is the same as that of Embodiment 2, except that the structures of the holes reserved for the mosaic piece and the silicon carbide green body are changed. In this embodiment, when processing the titanium alloy insert, the insert structure is as follows figure 2 As shown in (a), the shape is wedge-shaped, which restricts its degree of freedom in the Z-axis direction. A plane is reserved on the side to limit its degree of freedom in the XY direction. Partial teeth are reserved on the side to ensure that it is mechanically locked with aluminum. The outer diameter of the small head of the insert is 5mm, and the pre-tapping thread cannot exceed M3 to ensure that the thread structure is on the insert.

[0047] When processing silicon carbide ceramics, a reserved hole is reserved in advance, and the shape of the inner hole is consistent with the shape of the insert, such as figure 2 As shown in (b), ensure that the matching gap between the in...

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Abstract

The invention discloses a method for increasing the dismounting and mounting frequency of a AlSiC thread hole. A ceramic blank body is machined firstly, the formed ceramic blank body is machined, a bottom hole is reserved in the ceramic blank body, an insert part made of a hard alloy is embedded in the reserved bottom hole of the ceramic blank body for mold filling, through aluminum infiltration,the insert part and the ceramic blank body are combined, through the mechanical locking manner, the insert part is fixed into an AlSiC blank body, finally, the thread machine is machined in the insertpart for make the AlSiC finished product, the insert part and the AlSiC blank body are combined tightly, the strength of the insert part is high, the whole process is formed at a time, and use reliability is high.

Description

technical field [0001] The invention belongs to the technical fields of power electronics and aerospace, and in particular relates to a method for increasing the number of disassembly and assembly times of threaded holes of AlSiC parts. Background technique [0002] AlSiC is aluminum silicon carbide. As the third-generation electronic packaging material, it has high thermal conductivity (180-240W / (m K)) and small expansion coefficient (6.5-9.5×10 -6 ), low density 2.9~3.2g / cm 3 , high bending strength (> 300MPa) and other advantages are widely made into power module package bottom plate and aerospace structural parts. [0003] Aluminum silicon carbide base plates and structural parts are often combined with other components to form the final module or device through threaded holes, counterbore holes, through holes and blind holes. Due to the high hardness and high brittleness of aluminum silicon carbide materials, tapping directly on it not only wears the tool faster, b...

Claims

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Application Information

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IPC IPC(8): F16B37/04
CPCF16B37/048
Inventor 杨晓青魏鹏陈阳阳
Owner 镇安明科电子材料有限公司
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