JP2002075068A - Flexible electric conductor for welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible electric conductor for a welding machine to ensure adequate welding current and to keep a firm installing which can be realized through preventing a conductor deforming by providing cooling devices at calking positions of both ends of the conductor respectively. SOLUTION: This flexible electric conductor 1 for the welding machine consists of laminated plates or stranded wires whose both ends 2 are calked wherein through holes 6 are made by machining at the calking positions respectively and these holes are sealed to use as watertight holes 7 through which cooling water flows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling apparatus for a flexible conductor for a welding machine, comprising a laminated plate or a stranded wire assembly in which thin conductors are overlapped.

[0002]

2. Description of the Related Art Hitherto, as a flexible conductor for a welding machine as described above, one in which both ends of the conductor are caulked is known as shown in Japanese Patent Application Laid-Open No. Hei 7-161232.

[0003]

However, in the case of the above-mentioned conventional example, the crimping portion, which is the mounting portion at both ends, is overheated by the supply of a high current and the repeated bending of the flexible portion during use of the conductor. As a result, the resistance of the conductor increases and the current value decreases, so that an appropriate welding current cannot be ensured, and the crimping may be loosened or the mounting fastener may be damaged.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide independent cooling devices at caulking portions at both ends of a conductor. It is an object of the present invention to provide a flexible conductor for a welding machine which can secure an appropriate welding current, prevent deformation of the conductor, and maintain reliable mounting.

[0005]

In order to achieve the above-mentioned object, a flexible conductor for a welding machine according to the present invention has a through-hole formed by caulking an end of the conductor and forming a hole in the caulked portion. The cooling water flow hole is formed by piercing and sealing the through hole.

Further, a pipe member is fitted into the through hole to form a cooling water flow hole.

[0007] Further, the present invention is characterized in that solder is provided in the through hole, and a through hole is further formed in the solder portion by drilling to form a cooling water flow hole.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a main body of a flexible conductor for a welding machine comprising a laminated plate body in which thin conductors are overlapped, and both ends 2 of the main body 1 are inside a metal plate 3 having a U-shaped cross section. It is stored in.

Reference numerals 4 and 4 denote holes for crimping both ends 2 and 2 of the flexible conductor for a welding machine through the metal plate 3 by, for example, rivets. By caulking the ends 2 and 2 using the holes 4 and 4,
Reference numeral 2 denotes a caulking portion.

Are bolt holes penetrating the upper and lower plates of the metal plate 3. Bolts (not shown) are inserted into the holes 5, 5,. Both ends 2, 2 of the conductive conductor are connected to, for example, an arm side (not shown) of a welding machine and a secondary side (not shown) of a welding transformer.

In addition, through holes 6 and 6 are formed at both ends 2 and 2 of the flexible conductor for a welding machine, which are the caulking portions, by drilling or pressing. The holes 6 and 6 are sealed so as not to leak water to the electric conductor, so that cooling water circulation holes 7 and 7 are formed.

In the flexible conductor for a welding machine having the above-described structure, when cooling water is circulated through the cooling water flow hole 7, the water is supplied to the end 2 of the flexible conductor for a welding machine. This effectively acts on the cooling of the caulked portion and can efficiently reduce the overheating of the caulked portion which is most easily overheated by the conductor.

Although the flexible conductor for a welding machine has been described with reference to a laminate made up of thin conductors, a twisted wire assembly known as the conductor in the present invention. May be employed. The caulking of the conductor may be performed by directly pressing the metal plate 3 containing the conductor, or the metal plate 3 may be omitted and the conductor itself may be caulked by rivets or the like. .

FIG. 3 shows that a through hole 6 is formed by drilling at the end 2 of a flexible conductor for a welding machine, which is a caulking portion, and there is no water leakage to the conductor in the through hole 6. In order to form the cooling water flow hole 7 by applying such a seal, a pipe member 8 is fitted into the through hole 6 to form the cooling water flow hole 7, and the pipe member 8 is a steel pipe. Alternatively, a rubber tube or the like can be appropriately employed.

When the flow hole 7 is formed by using the pipe member 8 as described above, it can be formed very easily.

FIG. 4 shows that the metal which melts at a low temperature is poured into the through-hole 6 by drilling to form the through-hole 7 and soldered into the through-hole 6. This shows a through hole formed by processing to form a flow hole 7 for cooling water.

When the flow holes 7 are formed using solder as described above, the seal can be reliably and easily formed.

[0018]

According to the present invention, the end of the conductor is swaged, a through-hole is formed in the swaged portion by drilling, and the through-hole is sealed to form a cooling water flow hole. Since it is possible to efficiently reduce the overheating of the caulking portion which is most likely to be overheated by the conductor, it is possible to secure an appropriate welding current, prevent the conductor from being deformed, and maintain the secure mounting. The resulting flexible conductor for a welding machine is obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a flexible conductor for a welding machine according to the present invention.

FIG. 2 is a front view of an end of a flexible conductor for a welding machine according to the present invention.

FIG. 3 is an enlarged sectional explanatory view of an embodiment of a cooling water flow hole of the flexible conductor for a welding machine according to the present invention.

FIG. 4 is an enlarged sectional explanatory view of another embodiment of the cooling water flow hole of the flexible conductor for a welding machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body part of flexible conductor for welding machines 2 End part of body part (caulking part) 4 Caulking hole 6 Through hole by drilling 7 Cooling water flow hole 8 Tube member 9 Solder part

Claims (3)

[Claims] 1. A flexible conductor for a welding machine comprising a laminated plate or a stranded wire, wherein an end of the conductor is caulked, and a through hole is formed in the caulked portion by drilling. A flexible conductor for a welding machine, characterized in that holes are sealed to form cooling water circulation holes. 2. A flexible conductor for a welding machine according to claim 1, wherein a pipe member is fitted into said through hole to form a cooling water flow hole. 3. The flexibility for a welding machine according to claim 1, wherein solder is provided in said through hole, and a through hole is further formed in said solder portion by drilling to form a flow hole for cooling water. conductor.