KR200371072Y1 - Coupling for welding cable - Google Patents

Abstract

In the coupling for a welding cable according to the present invention, the socket assembly 20 is formed of any one of phosphorus copper and tarp pitch copper, and the welding cable 28 is formed by the wire connector 50 and the nut 60. A wire connection hole insertion hole 36 to be coupled is formed at one side, and a plug bar insertion hole 34 is formed at the other side. The plug assembly 70 is formed of the same material as the socket 30, the wire connector insert hole 84 is coupled to the welding cable 76 by the wire connector 50 and the nut 60 is formed on one side, A plug 80 having a plug bar 90 inserted into the plug bar insertion hole 34 of the socket 30 and coupled to the other side is formed. As described above, a method of manufacturing a coupling for a welding cable having a socket 30 and a plug 80 may be performed by cutting a bar formed of any one material of phosphorus copper and tarp pitch copper to a predetermined length so that the socket 30 and the plug ( The raw materials 30 'and 80 for forming the 80 are prepared (S500), the raw material 30' for forming the socket 30 is forged, and the plug bar insertion hole 34 of the socket 30 and The wire connector insertion hole 36 is formed and the raw material 80 'for forming the plug 80 is forged to form the plug bar 90 and the wire connector insertion hole 84 of the plug 80 (S510). After the machining process, the fixing hole 38, the stopper coupling hole 42, the slot 40 and the screw are formed in the forged socket 30 through the machining, and the fixing hole in the forged plug 80. 88, fixing lugs 92 and screws are formed.

Description

Coupling for Welding Cables {COUPLING FOR WELDING CABLE}

The present invention relates to a coupling for a welding cable, and more particularly to a coupling for a welding cable that can be connected to the welding cable consisting of a socket and a plug.

The welding cable is used to extend from the place where the welding device is installed to the place where the welding torch is located, and the coupling for the welding cable is used to connect the welding cable extending from the welding device and the welding cable extending from the welding torch.

1 is a perspective view illustrating a state in which a socket assembly and a plug assembly are separated from a coupling for a welding cable which is generally used, and FIG. 2 is a cross-sectional view illustrating a form in which the socket assembly and the plug assembly of FIG. 1 are combined. 3 is an exploded perspective view for explaining the configuration in which the welding cable of both sides in the coupling for the welding cable of Figure 1 to be electrically connected.

1 to 3, a coupling 10 for a general welding cable includes a socket assembly 20 and a plug assembly 70. The socket assembly 20 is a welding cable 26 having a connecting terminal 28 connected to the welding device (or welding torch) side, a socket to which the welding cable 26 is connected by an electric wire connector 50 and a nut 60. 30, a socket sheath 22 for sealing the joint between the socket 30 and the welding cable 26, and a fixing pin 24 for fixing the socket 30 and the socket sheath 22. And the plug assembly 70 is a welding cable 76 having a connecting terminal 78 connected to the welding torch (or welding device) side, the welding cable 76 is connected by the wire connector 50 and the nut 60 It consists of a plug 80, a plug sheath 72 for sealing the coupling portion of the plug 80 and the welding cable 76, and a fixing pin 74 for fixing the plug 80 and the plug sheath 72 for welding. When welding is performed away from the device, the welding device and the welding cable for supplying power to the welding torch are connected.

At this time, as shown in Figure 3, in the coupling 10 for the welding cable, the welding element 26 extending from the welding device and the welding cable 76 extending from the welding torch is made of a metallic element such that the electrical communication There is a socket 30, a plug 80, a wire connector 50 and a nut 60.

The coupling 10 for the welding cable serves to connect the high pressure current generated by the welding device to the welding torch. And because of the nature of the welding work welding torch to move a lot occurs when the separation of the coupling 10 is made from time to time. Therefore, the coupling 10 should be configured to stably transmit high-pressure current from the welding device to the welding torch, and durability is required to maintain the contact between the socket and the plug at all times even in spite of the separation and coupling of the coupling, which is frequently generated. do.

However, the coupling for the conventional welding cable has a variety of problems in this regard. That is, the coupling for the conventional welding cable is processed by placing a large assembly tolerance (typically about + 0.1mm) between the socket and the plug for separation and coupling, which is often generated. The size increases with the machining tolerances, which causes a decrease in contact between the socket and the plug. In particular, the gap (tolerance) generated between the socket and the plug is increased in proportion to the use time due to the separation and coupling that occurs frequently. For this reason, the conventional coupling has a low contact between the socket and the plug, so excessive heat is generated in the coupling, which may cause a safety accident, and the socket coating and plug coating may age quickly due to repeated heat. There is a risk of electric shock when disconnecting and coupling couplings. In addition, the tolerance generated in this way decreases the contact between the socket and the plug, which causes the power supplied from the welding device to be unstable to the welding torch, causing welding to be uneven, and the head of the welding torch It causes damage quickly.

Therefore, the present invention has been proposed to improve the problems in the coupling for the conventional welding cable, a new type of welding that can maintain the contact accuracy between the socket and the plug for a relatively long time and to ensure that the power is transmitted stably. To provide a coupling for the cable.

1 to 3 are views for explaining a coupling for a typical welding cable;

4 is a flowchart for explaining a method of manufacturing a socket and a plug in a coupling for a conventional welding cable;

5A and 5B are views for explaining a method of manufacturing a socket and a plug in a coupling for a conventional welding cable in detail;

6 is a flowchart for explaining a method for manufacturing a socket and a plug in a coupling for a welding cable according to the present invention;

7A and 7B are views for explaining a method of manufacturing a socket and a plug in a coupling for a welding cable according to a preferred embodiment of the present invention in detail.

Explanation of symbols on the main parts of the drawings

10 coupling 20 socket assembly

22: socket cover 24, 74: fixing pin

26, 76: welding cable 28, 78: connection terminal

30: socket 32: socket body

34: plug bar insertion hole 36, 84: wire connection port insertion hole

38, 88: fixing hole 40: slot

42: stopper coupling hole 44: stopper

50: wire connector 60: nut

70: plug assembly 72: plug sheath

80: plug 82: plug body

90: plug bar 92: fixing lug

94: cutting surface

According to a feature of the present invention for achieving the above object, the present invention is a socket assembly 20 connected to the welding cable 26 having a connection terminal 28 connected to the welding device side and a connection terminal connected to the welding torch side In a coupling for a welding cable having a plug assembly 70 connected with a welding cable 76 having a 78, the socket assembly 20 is formed of any one of phosphorus copper and tarp pitch copper. And the wire connecting hole insertion hole 36 in which the welding cable 28 is coupled by the wire connecting hole 50 and the nut 60 is formed at one side, and the plug bar inserting hole 34 is formed at the other side ( 30, wherein the plug assembly 70 is formed of the same material as the socket 30, and the welding cable 76 is connected to the wire connector 50 and the nut 60 by the wire connector insert hole 84 is formed on one side, and the said Is inserted into the plug bar insertion hole 34 of the plug 30 includes a plug 80 which plugs the bar 90 is formed to be coupled.

In the coupling for the welding cable according to the present invention, the socket 30 by cutting the bar formed of any one material of the phosphoric acid copper and the tarp pitch copper to a predetermined length by forging the plug bar insertion hole 34 And a wire connector insertion hole 36, and the plug 80 cuts the rod formed of the same material as the socket 30 to a predetermined length and forges the plug bar 90 and the wire connector insertion hole ( 84) can be formed.

According to another feature of the present invention for achieving the above object, the present invention, in the manufacturing method of the coupling for a welding cable having a socket 30 and a plug 80, any one of phosphorus copper and tarp pitch copper Preparing raw materials 30 ′ and 80 for forming the socket 30 and the plug 80 by cutting the bar formed of a material to a predetermined length (S500); Forging the raw material 30 ′ for forming the socket 30 to form the plug bar insertion hole 34 and the wire connector insertion hole 36 of the socket 30, and form the plug 80. Forging the raw material 80 'to form a plug bar 90 and a wire connector insertion hole 84 of the plug 80 (S510); Through the machining process, the fixing hole 38, the stopper coupling hole 42, the slot 40 and the screw are formed in the forged socket 30, and the fixing hole 88 in the forged plug 80. And forming the fixing lugs 92 and the screws.

In the manufacturing method of the coupling for a welding cable according to the present invention as described above, the forging process is made through any one of the cold forging and the forging processing method, it can be made using a forging machine.

In the method of manufacturing a coupling for a welding cable according to the present invention, the step of forging the raw material 80 'for forming the plug 80 may form a cut surface 94 on the fixing lug 92. Can be.

The present inventors examined in various forms to solve the problem of the coupling for the conventional welding cable. In this process, the inventors have determined that the problem occurring in the conventional coupling is due to the socket and the plug forming the contact portions on both sides. That is, in the conventional coupling, the socket and the plug are formed through machining such as lathe machining using the free cutting brass rod C3604 as shown in FIGS. 4 to 5b. It is judged that the problem is caused by the machining of the contacted part.

The coupling for the conventional welding cable uses a free cutting brass bar (C3604) with excellent machinability because all processes are made by machining. However, free cutting rods have relatively low electrical conductivity (28% IACS). Therefore, current transfer by copper wire (welding cable) becomes poor and high heat is generated in the coupling due to the current resistance. In addition, all the processes are made through the machining of the bar, so considering the productivity, the processing tolerance is inevitably large, the assembly tolerance between the socket and the plug is larger, and the uniform contact accuracy cannot be effectively maintained.

4 is a flowchart illustrating a method of manufacturing a socket and a plug in a coupling for a conventional welding cable, and FIGS. 5A and 5B illustrate a method of manufacturing a socket and a plug in a coupling for a conventional welding cable in detail. Figures for.

3 and 4 of the conventional method for manufacturing a coupling for a welding cable by cutting a bar formed of a material of free cutting brass to a predetermined length to form a raw material for forming the socket 30 and plug 80 (S600). Next, the socket 30 and the plug 80 are formed through machining such as drill, lathe, milling, screws, and chamfering (S610).

More specifically, referring to Figures 3, 5a and 5b, in the manufacturing method of the coupling for the conventional welding cable socket 30 is a method of manufacturing a bar formed of a material of the free cutting brass predetermined length (usually about 91mm ) To form the raw material 30 'to form the socket 30 (S600), and then drill the plug bar insertion hole 32 to one side of the socket body 32 using an automatic lathe or the like. It forms (S612). Then, the other end of the socket body 32 is drilled to form the wire connector insertion hole 36 (S614), and then corresponds to the screw of the nut 60 coupled to the wire connector insertion hole 36 through the tapping process A female screw is formed (S616). As such, after forming the plug bar insertion hole 32 and the wire connecting hole insertion hole 36 in the socket body 32, the fixing hole 38 is sequentially formed through the drilling process (S618), and through the cutting process The slot 40 is formed (S620), the stopper coupling hole 42 is formed through the drilling process (S622), and the screw 30 is formed in the stopper coupling hole 42 through the tapping process (S624). Will complete. Then, the plug 80 cuts the bar formed of the material of free cutting brass to a predetermined length (typically about 92 mm) to form a raw material 80 'for forming the plug 80 (S600), and then uses an automatic lathe. And drilled the wire connector insertion hole 84 to one side of the raw material 80 '(S630), and then corresponds to the screw of the nut 60 coupled to the wire connector insertion hole 84 through tapping. A female screw is formed (S632). In addition, the fixing hole 88 is formed through the drill process (S634), and the plug bar 90 is formed through the lathe process (S636). After the plug bar 90 is formed in this manner, the cutting lug 92 is formed on the fixing lug 92 and the fixing lug 92 at the end of the plug bar 90 through cutting (S638, S640). The plug 80 is completed.

As described above, the coupling for the conventional welding cable was formed through machining using a free cutting brass rod C3604. In this regard, the present inventors proposed the present invention in accordance with the judgment that it is necessary to increase the electrical conductivity and increase the contact accuracy of the socket 30 and the plug 80 in order to improve the problem of the coupling for the conventional welding cable.

Coupling for the welding cable according to the present invention and the method of manufacturing the same according to the inventors of the present invention using the material of the socket 30 and the plug 80 of the phosphoric acid copper (C1220) or tarp pitch copper (C1100) It is a technical feature to form. In addition, the technical features of the present invention is the part of the socket 30 and the plug 80 when the socket 30 and the plug 80 is formed of a phosphoric acid copper or tarp pitch copper (plug bar insertion hole 34, The plug bar 90} and the portion (wire connection port insertion holes 36 and 84) to which the copper wire of the welding cable is connected are formed by forging.

6 is a flowchart illustrating a method of manufacturing a socket and a plug in a coupling for a welding cable according to the present invention.

3 and 6, a method for manufacturing a coupling for a welding cable according to a preferred embodiment of the present invention is first cut the bar formed of any one material of phosphorus copper and tarp pitch copper to a predetermined length socket ( 30) and the raw materials 30 'and 80 for forming the plug 80 are prepared (S500). Forging the raw material 30 ′ for forming the socket 30 to form the plug bar insertion hole 34 and the wire connector insertion hole 36 of the socket 30, and to form the plug 80. The raw material 80 'is forged to form a plug bar 90 and a wire connector insertion hole 84 of the plug 80 (S510). After the forging process is completed, a fixing hole 38, a stopper coupling hole 42, a slot 40, and a screw are formed in the forged socket 30 through machining, and the plug 80 is forged. In the fixing hole 88, the fixing lug 92 and the screw is formed (S520).

Such a coupling for a welding cable according to the present invention is superior in electrical conductivity {coupling phosphorus copper (86% IACS), tarp pitch copper (101% IACS)} compared to a coupling formed of a conventional free cutting brass. Compared to the coupling, less heat is generated and power is transmitted stably. In addition, since the socket and the plug are formed by forging, the contact precision between the socket and the plug is improved as compared with the coupling formed by the conventional machining, thereby effectively reducing the power loss. In addition, according to the present invention can use a small amount of raw materials and increase the productivity, compared to the conventional manufacturing method of the coupling for the welding cable, there is an advantage that can maintain the quality uniformly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 3 and 6 to 7b. On the other hand, the drawings and detailed descriptions of the technical contents that can be easily applied to the coupling for a general welding cable and a method of manufacturing the same in each of the drawings are easily understood by those skilled in the art, so they will be briefly or omitted. The parts related to the design are shown.

7A and 7B are views for explaining a method of manufacturing a socket and a plug in a coupling for a welding cable according to a preferred embodiment of the present invention in detail.

3, 7a and 7b, the coupling 10 for a welding cable according to a preferred embodiment of the present invention is formed of any one material of phosphoric acid copper and tarp pitch copper, welding cable 28 The socket assembly 20 having a socket 30 having a wire connector insertion hole 36 coupled to the wire connector 50 and a nut 60 on one side and a plug bar insertion hole 34 formed on the other side. To connect the welding cable 26 to the welding apparatus. Then, the socket 30 is formed of the same material, and the welding cable 76 is connected to the wire connector 50 and the nut 60 by the wire connector insertion hole 84 is formed on one side, the socket 30 on the other side In order to connect the welding cable 76 connected to the welding torch using a plug assembly 70 having a plug 80 having a plug bar 90 inserted into and inserted into the plug bar insertion hole 34. do. In this case, the socket assembly 20 may be connected to the welding cable 26 connected to the welding torch, and the plug assembly 79 may be connected to the welding cable 76 connected to the welding device.

In addition, the socket 30 and the plug 80 of the coupling 10 for the welding cable is formed by cold forging or forging of the forging, thereby increasing the dimensional accuracy and uniform quality. Cold forging has the advantage of being able to obtain high strength because of the work hardening caused by deformation, and to obtain products with clean surface and high dimension accuracy. In addition, the die forging has the advantage of being able to mass produce a certain shape and dimensions by applying a mold. In a preferred embodiment of the present invention, the contact portion of the socket 30 and the plug 80 is formed by cold forging or die forging, so that the dimensional precision is high and processed to uniform dimensions to maintain a stable quality. In addition, in the preferred embodiment of the present invention forging processing of the socket 30 and the plug 80 forging by applying a multi-ram forging to accelerate the work speed by pressing several places of the raw material at the same time by using a number of rams This can be done effectively to increase production.

3, 6 to 7b, the method for manufacturing a coupling for a welding cable according to a preferred embodiment of the present invention is any one of the socket 30 and the plug 80 of phosphoric acid copper and tarp pitch copper After cutting the bar formed of a material of a predetermined length to prepare the raw material (30 ', 80) for forming the socket 30 and plug 80 (S500), the raw material 30 for forming the socket 30 ') To form a plug bar insertion hole (34) and a wire connector insertion hole (36) of the socket (30), and forging the raw material (80') for forming the plug 80 to the plug ( The plug bar 90 and the wire connector insertion hole 84 of the 80 are formed (S510), and then the fixing hole 38, the stopper coupling hole 42, and the slot in the forged socket 30 are machined. 40 and the screw is formed, and the fixing hole 88, the fixing lug 92 and the screw is formed in the forged plug (80) (S520).

More specifically, as shown in FIG. 7A, the socket 30 processes a raw material 30 ′ cut into a bar formed of any one of phosphorus copper and tarp pitch copper to a predetermined length (about 56 mm) (S500). ) At this time, since the raw material 30 ′ for forming the socket 30 is about 60% of the amount of conventional free cutting brass, the present invention has the effect of producing the same product with a smaller amount of raw material than the conventional cable. The raw material 30 'prepared as described above forms a plug bar insertion hole 34 and a wire connector insertion hole 36 from the side of the socket body 32 using a forging method of cold forging or die forging ( S510). In addition, a female thread corresponding to a screw of the nut 60 coupled to the wire connector insertion hole 36 is formed through tapping (S522). In this way, after the plug bar insertion hole 32 and the wire connection hole insertion hole 36 are formed in the socket body 32, the fixing hole 38 is sequentially formed through the drilling process (S524), and the cutting process is performed. The slot 40 is formed (S526), the stopper coupling hole 42 is formed through the drilling (S528), and the screw 30 is formed in the stopper coupling hole 42 through the tapping (S530) by the socket 30 Will complete.

As shown in FIG. 7B, the plug 80 processes the raw material 80 'which is cut into a bar formed of any one of phosphorus copper and tarp pitch copper to a predetermined length (about 60 mm) (S500). . At this time, the raw material 80 'for forming the plug 80 is applied to the same material as the raw material 30' for forming the socket 30 described above. On the other hand, since the raw material 80 'for forming the plug 80 is about 60% of the amount of conventional free cutting brass, the present invention has the effect of producing the same product with a smaller amount of raw material than the conventional cable. . The raw material 80 'thus prepared is formed by using a lam forging machine in the forging method of cold forging or die forging to form the wire connector insertion hole 84 from the side of the plug body 82, and to the extension line of the plug body 82. The plug bar 90 is formed (S512). Then, a female thread corresponding to a screw of the nut 60 coupled to the wire connector insertion hole 84 through tab processing is formed (S540). After forming the plug bar 90 and the wire connection hole insertion hole 84, the fixing hole 88 is formed by drilling (S542), and the fixing lug at the end of the plug bar 90 through cutting. The plug 80 is completed by forming 92 (S544). At this time, the fixing lug 92 is formed with a cutting surface 94 to prevent the stopper 44 coupled to the socket 30 from being caught when the plug 80 is separated from the socket 30. 94 is made at the same time as forging the raw material 80 'for forming the plug 80, so as to form the cut surface 94 without additional machining (cutting) as in the prior art.

As described above, the coupling for the welding cable according to a preferred embodiment of the present invention and a method of manufacturing the same are shown in accordance with the above description and drawings, but this is for example only and does not depart from the spirit of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope.

According to the coupling for the welding cable and the manufacturing method thereof according to the present invention, since the socket and the plug are formed of phosphorus copper or tarp pitch copper, the electrical conductivity is excellent, so that the current transmission is constant compared to the coupling for the conventional welding cable. Since the transfer resistance of is minimized, the amount of heat generated can be reduced. In addition, since the socket and the plug are formed by forging, the contact precision between the socket and the plug is improved compared to the coupling formed by the conventional machining, and the power is effectively transmitted while reducing the loss of power. The risk can be minimized. In addition, according to the present invention, compared to the conventional method for manufacturing a coupling for a welding cable, a small amount of raw materials can be used and productivity can be increased, and the quality can be maintained uniformly.

Claims (2)

Plug assembly 70 connected with a welding assembly 26 connected with a welding cable 26 having a connecting terminal 28 connected to the welding apparatus side and a welding cable 76 having a connecting terminal 78 connected to the welding torch side. In the coupling for a welding cable having a) The socket assembly 20 is formed of any one of phosphorus copper and tarp pitch copper, and the welding connector 28 is connected to the wire connector 50 and the nut 60 by the wire connector insertion hole 36. The socket 30 is formed on one side and the plug bar insertion hole 34 is formed on the other side, The plug assembly 70 is formed of the same material as the socket 30, the wire connector insert hole 84 is coupled to the welding cable 76 by the wire connector 50 and the nut 60 on one side And a plug (80) formed on the other side and having a plug bar (90) inserted into and coupled to the plug bar insertion hole (34) of the socket (30) on the other side. The method of claim 1, The socket 30 is formed by cutting the bar formed of any one material of phosphorus copper and tarp pitch copper to a predetermined length and forging to form the plug bar insertion hole 34 and the wire connector insertion hole 36. Plug 80 is for welding cable, characterized in that the plug bar 90 and the wire connector insertion hole 84 is formed by forging by cutting the bar formed of the same material as the socket 30 to a predetermined length Coupling.