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Electric soldering iron tip and electric soldering iron

A technology of soldering iron tips and electric soldering irons, applied to soldering irons, soldering positions, coatings, etc., can solve problems such as difficult temperature control of temperature differences, deterioration of heat conduction, short circuits, etc., and achieve improved oxidation resistance, excellent oxidation resistance, and improved performance Effect

Inactive Publication Date: 2005-09-21
HAKKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, in terms of structure, when the above-mentioned soldering iron tip 3 is installed on the ceramic heater 5 for heating, due to the presence of an air layer on the inner surface of the cylinder part of the soldering iron tip 3, it will be violently oxidized to produce CuO or Cu 2 Scale such as O not only deteriorates heat conduction, but also causes failures such as short circuits
[0012] In addition, since the tip of the soldering iron is a freely pluggable structure, there is a narrow gap between the inner surface of the inner tube 4 and the outer peripheral portion of the ceramic heater 5, and it is difficult to perform high-precision temperature measurement due to the resulting temperature difference. control
In addition, as an improvement measure, a thin stainless steel inner tube 4 is provided between the cylindrical portion 8 of the soldering iron tip 3 and the ceramic heater 5 as described above, but even in this case, the base body cannot be avoided. The material copper is violently oxidized, and due to the poor thermal conductivity of stainless steel tubes, it will have a shielding effect on heat transfer, slowing down the response speed of the temperature sensor

Method used

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  • Electric soldering iron tip and electric soldering iron
  • Electric soldering iron tip and electric soldering iron
  • Electric soldering iron tip and electric soldering iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0018] According to yet another preferred embodiment of the third soldering iron tip for an electric soldering iron of the present invention, the aforementioned first member is fixed on the front end of the substantially cylindrical tubular member.

[0019] In addition, the above-mentioned soldering iron tip of the present invention is characterized in that the surface of the soldering iron tip of a soldering iron made of copper or copper alloy is modified into a Cu-Al alloy coating layer with a high Al concentration, and the surface is formed with aluminum oxide (Al 2 o 3 ) of the firm film, endowed with oxidation resistance at high temperatures.

[0020] A brief description of the drawings

[0021] figure 1 It is an exploded perspective view showing the structure of a conventional electric soldering iron.

[0022] figure 2 yes means figure 1 An illustration of the assembled state of the soldering iron.

[0023] image 3 It is a schematic cross-sectional view of a sol...

Embodiment 1

[0050] The scope of application of the surface modification method of the present invention is to replace the chrome plating of the soldering iron tip in the prior art. Or on the inner surface portion of the barrel portion 8 where the copper material of the copper soldering iron tip is exposed. In the prior art, this part is protected with an inner tube 4 . The soldering iron tip 3 used in this embodiment is a pure copper material, and its size and shape are shown in Figure 5 .

[0051] First, the surface modification of the chrome-plated portion that has been used in the past will be described. Image 6 This is an example thereof. In this example, a partial iron plating layer 7 is formed in advance on the front end portion 3 a of the soldering iron tip 3 . The purpose of plating the iron layer 7 on this part is, as mentioned above, to prevent the copper or copper alloy as the raw material of the soldering iron tip 3 from being corroded by the solder, and it is not necessa...

Embodiment 2

[0054] The surface modification of the inner surface of the barrel portion 8 of the copper tip 3 will be described below. The main reason why this part has not been improved so far is that there are technical difficulties in chrome plating to increase oxidation resistance. The following will be described using examples.

[0055] The shape of the sample is the same as in the example, but the diameter of the cylindrical part is 4.2 mm and the depth is 23 mm.

[0056] Figure 7 It means that in this example, the mixture of Al particles and fluoride-based flux was coated on the outer peripheral surface of the soldering iron tip 3 in the same way as in part 10-1 of Example 1, and then evenly coated The inner surface of the barrel portion 8 was then heat-treated under the same conditions as in Example 1 to obtain a surface-modified layer 10-2. After the treatment, in order to observe the state of the inner surface, the sample was cut in half, and the results were observed, and th...

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Abstract

In a tip for an electric soldering iron 3 made of copper or a copper alloy, the outer surface of the tip 3a except the part thereof coated with a solder 9 is coated with a mixture of Al particles and flux, and then the Al particles alone are molten in an inert gas atmosphere, to thereby modify said outer surface so as to have a Cu-Al alloy coating layer of a high Al concentration 10-1. As a result, without using Cr plating, it is possible to provide an electric soldering iron having an excellent resistance to oxidation under high temperature environment and a high heat conductivity.

Description

technical field [0001] The invention relates to an electric soldering iron tip, in particular to a soldering iron tip and a soldering iron for which the surface of a base material is modified into a surface of a Cu-Al alloy with high Al concentration in order to enhance the oxidation resistance in a high temperature environment. Background technique [0002] Soldering is generally used for connection and bonding in the electronics industry. Such a soldering method is roughly divided into a batch soldering method (a collective soldering method) and a manual soldering method. [0003] In the batch soldering method, there are the following methods, that is, the flow soldering method in which components or parts are immersed in molten solder after mounting them on the printed circuit board, and the use of solder particles and flux The reflow soldering method (SMT) method is a soldering method (SMT) method in which the mounted parts are heated and soldered after printing the sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K3/02B23K3/03C23C26/02C23C30/00
CPCB23K3/025C23C30/00C23C26/02B23K3/0369
Inventor 川胜一郎上谷孝司宫崎充彦
Owner HAKKO CO LTD
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