JPH08294776A - Instrument for measuring current of manual operating arc welder - Google Patents

Abstract

PURPOSE: To provide a current measuring instrument for a manual operating arc welder which can grasp a value of the welding current in various welding conditions and confirm how degree in out of the reference range of the welding current. CONSTITUTION: This instrument is provided with a measuring part 11 arranged near a consumable electrode, a setting part 12 for setting the reference range of the welding current, a buzzer 13 and an LED 13a for informing what the measured value of the welding current is in the reference range, a storing part 14 for storing the max. measured value and the min. measured value in the welding current and a displaying part 15 for displaying the max. measured value and the min. measured value. The worker operates the welding work by adjusting a distance between the consumable electrode and a welding base material while paying the attension so as to keep the state, in which the buzzer, etc., 13 is worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current measuring device for a manual arc welding machine in which an operator performs arc welding while holding a consumable electrode by hand.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Laid-Open Nos. 61-63365 and 61-60272, the welding current supplied to a consumable electrode is measured and the welding current A current measuring device for an automatic arc welder has been proposed which detects that a weld has a defect when a measured value deviates from a predetermined reference range.

[0003]

By the way, the above-mentioned prior art is used in an automatic arc welding machine for performing arc welding while automatically feeding out a consumable electrode. It could not be used in a manual arc welder that carries out.

In such a manual arc welding machine, especially when the skill level of the operator is low, the consumable electrode is gripped by hand to maintain a constant distance from the welding base metal. Since it is difficult to perform the welding, the welding current often fluctuates and deviates from the predetermined reference range. For example,
When the welding current is lower than the reference range, there is a problem that the welding base metal is apt to cause defective melting, and conversely, when the welding current is higher than the reference range, an undercut is likely to occur in the welding base material.

The present invention has been made in view of the above-mentioned circumstances in the prior art, and its first purpose is to determine whether or not the welding current supplied to the consumable electrode during welding is at an appropriate level. An object of the present invention is to provide a current measuring device for a manual arc welder that a person can easily grasp.

A second object of the invention is to provide a current measuring device for a manual arc welder capable of grasping whether or not the welding current is at an appropriate level according to various welding conditions. .

A third object of the invention is to provide a current measuring device for a manual arc welding machine, which can confirm how much the welding current deviates from a predetermined range.

[0008]

In order to achieve this first object, the invention according to claim 1 of the present invention is a manual arc welding machine in which an operator performs arc welding while holding a consumable electrode by hand. In the current measuring device, the measuring unit, which is provided in the vicinity of the consumable electrode and measures the welding current supplied to the consumable electrode, and the notification that the measured value of the welding current is within a predetermined reference range. And a section.

Further, in order to achieve the second object, according to the invention described in claim 2 of the present invention, in addition to the above configuration, a setting unit for setting a reference range of the welding current according to various welding conditions. And a notification unit is activated when the measured value of the welding current is within the reference range.

Further, in order to achieve the third object, according to the invention of claim 3 of the present invention, in addition to the above configuration, a storage unit for storing the maximum measured value and the minimum measured value of the welding current, A display unit for displaying the maximum measured value and the minimum measured value is provided.

[0011]

Since the invention according to claim 1 of the present invention is configured as described above, the welding current supplied to the consumable electrode is measured by the measuring portion provided in the vicinity of the consumable electrode. The notification unit notifies that the measured value is within the predetermined reference range. As a result, during the welding operation, the operator can easily understand whether the welding current supplied to the consumable electrode is at an appropriate level.

Since the invention according to claim 2 is configured as described above, the measured value of the welding current is measured after the reference range of the welding current is preset by the setting unit according to various welding conditions. When it is within the above-mentioned reference range, the notification unit operates. This makes it possible to grasp whether or not the welding current is at an appropriate level according to various welding conditions.

Since the invention according to claim 3 is configured as described above, the maximum measured value and the minimum measured value of the welding current are stored in the storage unit, and the maximum measured value and the minimum measured value are displayed. Display in parts. Therefore, the operator can see how much the welding current deviates from the predetermined range by looking at the display on the display unit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a current measuring device for a manual arc welding machine according to the present invention will be described below with reference to the drawings. 1 is a block diagram showing an embodiment of the current measuring device for a manual arc welder of the present invention including the invention described in claims 1, 2 and 3, and FIG. 2 is a perspective view of the current measuring device of FIG. 3 is a diagram for explaining a display method of a display unit provided in the current measuring device of FIG. 1, and FIG. 4 is a perspective view of a manual arc welder including the current measuring device of FIG.

The manual arc welding machine shown in FIG.
And a welding cable 2 and a ground cable 3 connected to the main body 1, and a tip end of the welding cable 2,
A holder 5 for holding a consumable electrode (that is, an electrode rod) 4;
The clip 7 is attached to the tip of the ground cable 3 and holds the welding base material 6 therebetween. In such a manual arc welding machine, when the welding cable 2 is long, the welding current decreases due to the resistance of the welding cable 2 itself,
A current value adjusting handle 8 is provided on the main body 1 to adjust the welding current.

The current measuring device 9 of this embodiment is provided near the consumable electrode 4, that is, near the holder 5 and is detachably attached to the welding cable 2. As shown in FIG. 1, the current measuring device 9 includes a measuring unit 11 that measures a welding current supplied to the consumable electrode 4, a setting unit 12 that sets a reference range of the welding current, and a measured value of the welding current. An informing unit for informing that it is within the reference range,
For example, a buzzer 13 and an LED 13a, a storage unit 14 that stores the maximum and minimum measurement values of the welding current, and a display unit 1 that displays these maximum and minimum measurement values.
5 and.

Further, as shown in FIG. 2, the current measuring device 9 has a casing 16 which holds the welding cable 2 and which can be opened and closed.
And a fixing metal fitting 1 attached to the side surface of the housing 16
7 keeps the housing 16 closed. The LED 13 and the display unit 15 are provided on the display surface of the housing 16.
A power switch 18, a changeover switch 19 for sequentially switching the measurement range set by the setting unit 12, and a storage unit 14.
A memory switch 20 for operating the display unit 15 is also provided. Further, a buzzer 13 is built in the housing 16, and the buzzer sound is transmitted to the outside through the through hole 21.

On the display unit 15 described above, as shown in the right column of FIG. 1 to No. The characters corresponding to the welding conditions of No. 3 are displayed. Under the welding conditions of No. 1, "φ3.2", "upright" (outer diameter of consumable electrode 4:
3.2 mm, welding position: vertical) is displayed and No. In the welding conditions of No. 2, “φ3.2”, “water” (outer diameter of consumable electrode 4: 3.2 mm, welding position: horizontal) and “φ4.
0 "and" standing "(outer diameter of consumable electrode 4: 4.0 mm, welding position: standing), and No. Under welding conditions of 3, "φ
“4.0” and “water” (outer diameter of consumable electrode 4: 4.0 mm, welding position: horizontal) are displayed. These No. 1 to N
o. The welding conditions of No. 3 can be switched by sequentially pressing the changeover switch 19, and accordingly, the reference range of the welding current preset by the setting unit 12 is as shown in the left column of FIG. , 110A to 125A (No. 1
Welding conditions), 130A to 145A (No. 2 welding conditions), and 165A to 180A (No. 3 welding conditions).

In this embodiment, first, the current measuring device 9 is arranged in the vicinity of the holder 5, the housing 16 is opened, the welding cable 2 is engaged with the measuring portion 11 in the housing 16, and then the housing 16 is opened. The welding cable 2 is sandwiched by closing the
The housing 16 is kept closed by the fixing bracket 17. Then
The power switch 18 is turned on, and the changeover switch 19 is pressed according to welding conditions. For example, when performing vertical fillet welding using the consumable electrode 4 having an outer diameter of 3.2 mm, No.
By selecting the welding condition No. 1, the reference range of the welding current in the setting unit 12 is set to 110A to 125A, and "φ3.2" and "standing" are displayed on the display unit 15.

Next, when the worker holds the holder 5 and performs arc welding of the welding base material 6 with the consumable electrode 4, the welding current supplied to the consumable electrode 4 via the welding cable 2 is measured by the measuring unit 11. The maximum measured value and the minimum measured value of the welding current are stored in the storage unit 14, and
Reference range 11 in which the measured value of welding current is predetermined
Buzzer 13 sounds when it is within 0A to 125A, and L
The ED 13a lights up. On the other hand, when the measured value of the welding current is out of the predetermined reference range 110A to 125A, the buzzer 13 stops ringing and the LED 13a is turned off. Therefore, the worker is to operate the buzzer 13 and the LED
The welding operation is performed by adjusting the distance between the consumable electrode 4 and the welding base material 6 while paying attention so as to keep the 3a operating.

After performing the arc welding in this way,
When the operator presses the memory switch 20, the maximum measured value and the minimum measured value of the welding current stored in the storage unit 14 are read out, and the display unit 15 displays, for example, “130” A.
Is displayed.

In the embodiment thus constructed, it is determined whether the welding current supplied to the consumable electrode 4 during the welding operation is within the predetermined reference range by the buzzer 13 or L.
Since the operator can easily grasp the ED 13a, the operator can maintain the welding current at an appropriate level when manually performing arc welding.

Further, in this embodiment, the reference range of the welding current can be set by the setting section 12 by pressing the changeover switch 19 according to various welding conditions, so that the current measuring device 9 can be used for the consumable electrode 4 It is possible to cope with various welding conditions including the diameter and welding position.

Further, in this embodiment, the maximum and minimum measured values of the welding current are displayed on the display unit 15, and the operator can confirm how much the welding current deviates from the reference range. Welding technology can be improved.

In this embodiment, the buzzer 13 and the LED 13a are provided as an informing unit for informing that the measured value of the welding current is within the predetermined reference range.
If necessary, these buzzers 13 and LEDs 13a
It is also possible to provide only one of the above.

[0026]

Since the present invention is configured as described above, the invention according to claim 1 determines whether the welding current supplied to the consumable electrode during welding operation is within a predetermined reference range. A person can easily grasp and perform arc welding while maintaining the welding current at an appropriate level. Therefore, there is an effect that the quality of arc welding performed using a manual arc welder can be improved.

Further, according to the second aspect of the present invention, it is possible to know whether or not the welding current is within the reference range corresponding to various welding conditions, and therefore the versatility of the current measuring device for the manual arc welding machine. Is obtained.

Further, in the invention according to the third aspect, the operator himself can confirm to what extent the welding current deviates from the reference range, so that there is an effect that the welding technique of the operator can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment including the invention according to claims 1, 2 and 3 of a current measuring device for a manual arc welding machine of the present invention.

2 is a perspective view of the current measuring device of FIG. 1. FIG.

FIG. 3 is a diagram illustrating a display method of a display unit provided in the current measuring device in FIG.

4 is a perspective view of a manual arc welder including the current measuring device of FIG. 1. FIG.

[Explanation of symbols]

 2 Welding cable 4 Consumable electrode (welding rod) 9 Current measuring device 11 Measuring unit 12 Setting unit 13 Buzzer (Notification unit) 13a LED (Notification unit) 14 Storage unit 15 Display unit

Claims (3)

[Claims] 1. A current measuring device of a manual arc welding machine in which an operator performs arc welding while gripping a consumable electrode with a hand, and the welding current provided to the consumable electrode and provided to the consumable electrode is measured. A current measuring device for a manual arc welder, comprising: a measuring unit; and an informing unit for informing that the measured value of the welding current is within a predetermined reference range. 2. A setting unit for setting a reference range of the welding current according to various welding conditions, and the notifying unit is activated when the measured value of the welding current is within the reference range. The current measuring device for a manual arc welder according to claim 1. 3. A storage unit for storing the maximum measured value and the minimum measured value of the welding current, and a display unit for displaying the maximum measured value and the minimum measured value. The current measuring device of the described manual arc welding machine.