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Method for preventing looseness of ceramic contact pin and metal body fit

A metal body and pin technology, which is applied to the coupling of optical waveguides and other directions, can solve the problems of reduced interference fit force, loose fit between ceramic pins and metal bodies, and loose fit, and achieves high reliability.

Inactive Publication Date: 2003-06-11
WUHAN UNICELL TECH CO LTD
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  • Abstract
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Problems solved by technology

[0003] The disadvantages of this method are: the simulation test of low temperature, low and high temperature cycle and normal temperature environment shows that the ceramic pin and the metal body are loose, and in severe cases, under the action of the insertion force P1, the ceramic pin will The metal body is displaced, so that the ceramic pin cannot be inserted into the adapter body
In the process of thermal expansion and contraction with large temperature difference, the hole of the metal body has a slight residual deformation in the direction of the large, resulting in a decrease in the interference fit force, and in severe cases, resulting in loose fit

Method used

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  • Method for preventing looseness of ceramic contact pin and metal body fit
  • Method for preventing looseness of ceramic contact pin and metal body fit
  • Method for preventing looseness of ceramic contact pin and metal body fit

Examples

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Embodiment 1

[0018] Embodiment 1 (see Figure 4 )

[0019] A mating assembly of a ceramic pin 3 and a nickel-chromium alloy pin body 2, the diameter of section A of the thin shaft section of the ceramic pin 3 is φ2.5-0.02~-0.07mm, and the diameter of section B of the thick shaft section is φ2.499±0.0005mm, The nickel-chromium alloy pin body 2 has a hole diameter of φ2.5±0.008~-0.014mm. In practical applications, the ceramic pin bears a pressure of 10kg. Whether it is at room temperature or after a low-high temperature cycle test, the ceramic pin is The displacement of the body does not move at all.

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Abstract

The characteristics of the invention are that the mini step is designed in the mating part between the ceramics contact pin and the metallic body. The step includes the chamfering that is the transition part between the axes with different diameters. The tight fit is adopted between the thick axis and the mating hole of the metallic body. The transition fit is adopted between the thin axis and the mating hole of the metallic body. The assembly of the ceramics contact pin produced by adopting the said method guarantees the fastness and the relaibility of the fit between the ceramics contact pin and the metallic body in various usage environment.

Description

technical field [0001] The invention belongs to a connecting device of optical communication equipment, in particular to a method for preventing loosening of a ceramic pin and a metal body. Background technique [0002] At present, in optical communication equipment, there is a kind of ceramic component, and the firmness of the cooperation between the ceramic pin and the metal body adopts the method of interference fit (see figure 1 a, b two connection forms), that is, the method of pressing the ceramic pin into the matching hole by using the matching hole of the metal body smaller than the shaft diameter of the ceramic pin. [0003] The disadvantages of this method are: the simulation test of low temperature, low and high temperature cycle and normal temperature environment shows that the ceramic pin and the metal body are loose, and in severe cases, under the action of the insertion force P1, the ceramic pin will The metal body is displaced, so that the ceramic pin cannot...

Claims

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Application Information

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IPC IPC(8): G02B6/36
Inventor 王来勋
Owner WUHAN UNICELL TECH CO LTD
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