JPH0698484B2 - Tips for electric soldering irons - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip for an electric soldering iron, and more particularly to an end of a tip for directly contacting a member to be soldered for the purpose of performing complicated and precise soldering work such as an IC circuit. The present invention relates to a tip for an electric soldering iron in which a tip piece made of a strong material is formed by a forging operation.

[0002]

2. Description of the Related Art A conventional tip for an electric soldering iron is constructed so that a tip end portion of a copper pipe material is cut into a conical shape and a heating element is inserted into the tip portion to perform a soldering work. Therefore,
During the soldering process, lead is likely to erode the copper pipe material.
Further, the tip of the copper pipe material becomes thick during the soldering work, and lead is attached to a portion other than the portion to be soldered, which makes it difficult to solder a complicated and precise member such as an IC circuit. Met. In consideration of such a problem, recently, as shown in FIG. 4A, the tip portion of a copper pipe (a) is plated (b), and the portion excluding the conical tip portion is plated with chrome (c). ) The tip for the electric soldering iron was used. However, in this type of tip, it is difficult to form the plating layer uniformly, the copper pipe is heated to a high temperature during the soldering work, the plating layer is easily damaged, and the conical tip is eroded by the soldering. It has a drawback that it cannot be effectively prevented.

[0003]

On the other hand, as shown in FIG. 4B, a machined copper pipe material tip piece (c) is inserted and installed in an insertion hole (b) inside an aluminum material tip body (a), There is disclosed a tip for an electric soldering iron in which a tip piece of an aluminum material tip body (a) is covered with palladium (d). However, this tip must be manufactured by separately cutting a copper pipe material tip piece (c). In addition, since the tip piece (c) must be inserted into the insertion hole (b), it is difficult to manufacture and the production cost is high. Further, the heat transferred to the inside of the insertion hole (b) is radiated to the outside through the aluminum material tip body (a) having a low heat retaining property within a short time, so that the tip during the soldering work when the soldering work is large. There is also a problem that lead cannot be melted because the temperature of the tip itself drops due to the heat of the work being conducted to the work piece.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to make the manufacturing process easy and the manufacturing cost low, especially for complicated and precise soldering work in consideration of the problems described in the prior art. To provide a suitable tip for an electric soldering iron.
According to the present invention, a step is formed at the tip of the copper pipe,
Insert the tip piece of strong material on the outer circumference of this step,
After inserting this copper pipe into the hollow tip body,
(EN) Provided is a tip for an electric soldering iron in which a tip portion including a step portion into which the tip piece is inserted so that the tip piece and the tip body are fixed to each other is processed into an appropriate shape by a forging operation. In particular, when the tip end portion of the tip is forged, a welded portion is formed on the inside of the step portion of the copper pipe in contact with the tip end piece in the vertical direction in order to prevent the tip end piece from coming out of the copper pipe in the vertical direction.

The tip for the electric soldering iron according to the present invention does not need to separately manufacture the tip piece at the time of manufacturing, and a standardized copper pipe can be used. Since it is firmly fixed to the main body, it is easy to manufacture and the unit production cost is low. Further, it is economical because it lasts longer than that of forming a plating layer. In particular, if the tip body is made of stainless steel, etc., lead will only attach to the tip of the tip piece during soldering work.
It is possible to prevent lead from adhering to the tip body, and the heat of the copper pipe is conducted by the stainless steel tip body with high heat retention, so even if the soldering work is large, the tip heat does the soldering work. It is preferable because it is not conducted to an object. It is desirable to use a strong iron material or iron alloy for the tip piece of the tip.

[0006]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. As shown in FIG. 1, the tip according to the present invention has a tip piece (3) made of a strong material formed at the tip portion, and the connecting portion between the tip body (4) and the tip piece (3) is forged. It has a conical shape. Although the shape of the tip piece (3) is shown as a conical shape in FIG. 1,
It is also possible to suitably forge the shape of the member to which soldering is applied to provide the tip piece (3) in an arbitrary shape. Figure 2
1 shows a cross section of the tip shown in FIG. 1. The tip is roughly divided into three parts, that is, a copper pipe (1) arranged inside and a tip part of the copper pipe (1). It is a tip body (4) that surrounds the inserted tip piece (3) and the copper pipe (1). A step portion (2) formed by cutting or the like is formed at the tip of the copper pipe (1), and a tip piece (3) is fitted on the outer peripheral surface of the step portion (2). A welding portion (5) is formed on the outer end surface inside the step portion (2) in contact with the tip piece (3), and the welding portion (5) is used when the tip portion of the tip body (4) is forged. Step (2) of copper pipe (1)
It is formed by brazing or silver brazing to prevent the tip piece (3) from coming out of the
As a result, the tip piece (3) is firmly fixed to the copper pipe (1).

To explain in more detail, a process of manufacturing the tip according to the present invention will be described in detail with reference to FIG. Referring to FIG. 3, first, a step portion (2) is formed on the tip portion of the copper pipe (1) by cutting or the like, and then the tip piece (3) is fitted into the outer peripheral surface of the step portion (2). . Before inserting the tip piece (3) into the outer periphery of the step (2), for example,
A ring-shaped material such as silver solder is inserted into the outer peripheral surface of the step portion (2), and the tip piece (3) is fitted into the step portion (5). Then, both the tip piece (3) and the copper pipe (1) The weld (5) is formed by silver brazing or brazing so as to be fixed. Next, the copper pipe (1) in which the tip piece (3) is inserted is inserted into the tip body (4). After inserting the copper pipe (1) into the tip body (4) and forging the tip portion of the tip body with a forging machine, the tip piece (3) and the tip body (4) are fixed together. At the same time, the copper pipe (1) and the tip body (4) including the tip piece (3) are processed into a desired shape, and finally, as shown in FIG.
And a tip of the present invention is provided as shown in FIG. 2A. The material of the tip piece (3) is preferably a high strength iron material or iron alloy material. As described above, the shape of the tip piece (3) can be changed to an arbitrary shape by forging depending on the shape of the member on which the soldering work is performed.

[0008]

As the material of the tip body (4), a stainless material having a low thermal conductivity is suitable, but another suitable material can be selected if necessary. Incidentally, FIG.
If necessary, a copper rod (1 ') may be used instead of the copper pipe (1) as shown in B. The tip shown in FIG. 2B is the same as the tip shown in FIG. 2A, except that the copper pipe (1) is replaced with a copper rod (1 ′). As described above, according to the present invention, the welded portion (5) is formed to fix the tip piece (3) to the copper pipe (1), and the tip piece (3) and the tip body (4) are formed by only one forging operation. Since they can be fixed together, it is possible to provide a tip for an electric soldering iron which is easy to manufacture and has a low production unit price. Further, by using the stainless steel tip body (4) having a high heat retention property, a large soldering work can be easily soldered, and it is semi-permanently durable, which is economical.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tip for an electric soldering iron according to the present invention.

2A is a sectional view of the tip for an electric soldering iron shown in FIG. 1. FIG. B is a sectional view showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the manufacturing process of the present invention.

FIG. 4A is a sectional view showing a conventional heating tip.
B is a sectional view showing another conventional heating tip.

[Explanation of symbols]

 1 Copper pipe 1'Copper rod 2 Step portion 3 Tip piece 4 Tip body 5 Welded portion

Claims (5)

[Claims] 1. A copper pipe having a stepped portion formed at its tip, a tip piece fitted into an outer peripheral surface of the stepped portion of the copper pipe, and a hollow type member which entirely surrounds the copper pipe. Including the tip body, the tip piece and the copper pipe are fixed together by a welding portion formed on the outer end surface inside the step portion that contacts the tip piece, and the tip piece and the tip body of the tip body are fixed together. Tip for electric soldering iron whose parts are fixed by stacking by forging. 2. The tip for an electric soldering iron according to claim 1, wherein a material of the tip piece is an iron material or an iron alloy. 3. The tip for an electric soldering iron according to claim 2, wherein the tip piece has a conical shape. 4. The tip for an electric soldering iron according to claim 1, wherein the material of the tip body is an aluminum material. 5. The tip for an electric soldering iron according to claim 2 or 4, wherein the welded portion is formed by silver brazing or brazing.