CN2193788Y - Adjustable weld handle - Google Patents

Abstract

The utility model relates to a weld handle which can adjust an over-current limited current, comprising the weld handle and a wiring terminal arranged at the tail part of the weld handle. One terminal of the wiring terminal is connected with a weld head through conducting wires, and is connected with the output end of an arc welder through the conducting wires. The utility model is characterized in that the upper side of the hollow handle rod of the weld handle is provided with an adjustable resistance and an ammeter, and the adjusting node of the adjustable resistor is connected with the input end of the ammeter; the other end of the input end of the ammeter and both ends of the adjustable resistance are guided to the tail part by three conducting wires which pass through the hollow rod of the handle rod of the weld handle, and are guided out by connecting three terminals on the wiring terminal. The weld handle is matched with the arc welder, and can directly adjust and observe the over-current limited current on the weld handle.

Description

Adjustable weld handle

The utility model relates to the arc-welding machine electrode holder, relates in particular to a kind of electrode holder of regulating output current overcurrent current limit.

Common used welding machine has only a wiring that partly links to each other with soldering tip on the existing arc-welding machine, one end of the output on it and the ac arc wedling machine joins or joins with output one end on the DC arc welder, and the other end (or earth terminal) of arc-welding machine output joins with welded piece.The adjustable device of the current limit of arc-welding machine overcurrent protection is generally adjustable resistance, and it is arranged on the body of arc-welding machine, never be arranged in the past on the electrode holder, therefore when work high above the ground or welding machine when welder's distance is far away, operation is very inconvenient; Easily produce the accident that overcurrent damages weldment, especially for the multichannel inverter arc welding machine, because of its each passage is applicable to various thick, thin, large and small different workpieces, it is the big I difference of overcurrent current limit that passage respectively passes through, if can solve the size of electrode holder from accommodating adjusting overcurrent current limit, then its use is with more convenient, and effect and welding quality will more improve.

The purpose of this utility model is to design a kind of electrode holder of regulating arc-welding machine output current overcurrent current limit, to solve the above-mentioned problem that exists, makes the welder easy to operate, reduces the overcurrent arc-welding and damages welded part, improves work efficiency and welding quality.

The purpose of this utility model realizes and structure can be described in detail in conjunction with the accompanying drawings.

Description of drawings:

Fig. 1. structural representation of the present utility model.

Fig. 2. the utility model electrode holder connects schematic diagram with current foldback circuit.

By as seen shown in Figure 1:

A kind ofly regulate the electrode holder that the arc-welding machine output current is crossed the current limit electric current, the electrode holder 1 that includes an insulation, center band through hole 11, be linked to the welding head holder 6 of electrode holder 1 termination, place the binding post 2 of electrode holder 11 afterbodys, terminal 24 joins with soldering tip 6 by the lead 54 that is arranged in the electrode holder central hole 11 in binding post 2, and terminal links with the output of lead B and arc-welding machine thus, it is characterized in that an input 41 and adjustable node 31 usefulness of adjustable resistance 3 of ammeter 4 are led at electrode holder 1 device one adjustable resistance 3, an ammeter 4 Line 55 links; another input 42 of ammeter 4 and the contact 32 at adjustable resistance 3 two ends, 33 link respectively three terminals 21,22,23 of itself and terminal 2 by being arranged at three leads 51,52,53 in the electrode holder central hole 11, and terminal links with the current foldback circuit of lead L1, O, C1 and arc-welding machine thus.

The electrode holder of said structure and the arc-welding machine that has current foldback circuit logotype mutually; to link with the overcurrent qualifying part in three leads and the arc-welding machine current foldback circuit in use; and the adjusting by electrode holder adjusted resistance; the size of arc-welding machine overcurrent current limit is changed, and this current limit is demonstrated by the ammeter on the electrode holder.

Fig. 2 is the current foldback circuit and the joining schematic diagram of electrode holder of the present utility model of the output current in a kind of multichannel ac converter arc-welding machine.This current foldback circuit is to be made up of operational amplifiers such as LM339; output after the output current rectification of the negative terminal of the input of LM339 and arc-welding machine joins; the anode L1 of the input of LM339 and the end of the ammeter A1 on the electrode holder join; the other end of ammeter A1 and the point of adjustment 31 of the adjustable resistance on the electrode holder 3 are joined, and the two-end-point 32,33 of adjustable resistance 3 and the positive and negative end C of power supply, the O in the current foldback circuit join.Above-mentioned three line L1, O, the C1 that joins with ammeter A1, adjustable resistance 3 drawn by the circuit board of the current foldback circuit of arc-welding machine; cause and make it on the electrode holder binding post 2 respectively by terminal 21,22,23; then; by lead 51,52,53 it is introduced respectively in the hollow hole 11 of electrode holder 1, and with this three wires respectively be arranged at the ammeter A1 on the electrode holder, the electric connection 41,32,33 of adjustable resistance 3 links.Thereby make the adjusting of the adjustable resistance on the electrode holder relevant with the mistake current limit effect of current foldback circuit.

In sum; electrode holder of the present utility model has the adjustable resistance and the electric current dial gauge of adjustable overcurrent current limit size because of it; reach the on line that links with current foldback circuit, arc-welding machine input; so it is in using operation; just can operatively regulate required current limit value with adjustable resistance easily; and just can see in the ammeter that this value can be provided with on electrode holder, thereby realize the purpose of this utility model.

Claims (1)

1; a kind of electrode holder of regulating arc-welding machine output current overcurrent current limit; include an insulation; the electrode holder (1) of the coherent perforation in center (11); be linked to the welding head holder (6) of electrode holder (1) termination; place the binding post (2) of electrode holder (11) afterbody; terminal (24) joins with soldering tip (6) by the lead (54) that is arranged in the electrode holder central hole (11) in binding post (2); and terminal links with the output of lead B and arc-welding machine thus; it is characterized in that going up device one adjustable resistance (3) at welding machine (1); one ammeter (4); one input (41) of ammeter (4) links with lead (55) with the adjustable contact (31) of adjustable resistance (3); the contact (32) at another output (42) of ammeter (4) and adjustable resistance (3) two ends; (33) by three leads (51) that are arranged in the electrode holder central hole (11); (52); (53) make three terminals (21) of itself and terminal (2); (22); (23) link respectively, and terminal lead L1 thus; O; the current foldback circuit of C1 and arc-welding machine links.

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