JPH065764U - Primary electrode in welding equipment for metal members - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a primary electrode in a welding apparatus for repairing metal products such as synthetic resin molding dies such as relatively fine crushing, scratches, and dimension correction. A primary electrode 6 is provided with a permanent magnet 4 (or an electromagnet) at a portion where welding powder 2 is attached and welding is performed, or in the welding apparatus, the welding powder of the primary electrode 6 provided with a magnet is used. It is characterized in that it is made of a non-magnetic material 5 except for a portion where 2 is attached and welding is performed. [Effect] The required amount of the welding powder 2 can be welded directly to the primary electrode 6 or securely attached to the welding repair portion 1 of the metal member 3 to improve the work efficiency. It is possible to repair and reuse repair points that occur in various expensive metal members 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is intended for comparatively fine crushing of various metal products including synthetic resin molding dies, rubber molding dies, die casting dies and glass dies (hereinafter referred to as metal members). This relates to the primary electrode in welding equipment that is used for repairs (and corrections, including corrections) such as scratches and dimensional corrections.

[0002]

[Prior art]

 There is an increasing need for repairing and reusing relatively small scratches such as sagging and crushing at the molding and casting sites using synthetic resin molding dies and die casting dies. In this respect, various repair methods such as argon welding, silver roll build-up, plating build-up, etc., which have been used as conventional mold repair methods and devices, have their respective merits and demerits. The solution was requested as soon as possible.

The applicant paid attention to this point, and devised a welding / repairing method for a metal member, a welding method, and a welding apparatus according to Japanese Patent Application No. 4-63701. As shown in FIG. 7, the primary electrode a in the welding apparatus is made of a silver-tungsten alloy in the shape of a round bar, inserted into the tip of the conductor c, and fixed with a set screw h. In the case of, for example, build-up welding of the corners of triangular points using this primary electrode a, as shown in FIG. 8A, an appropriate amount of welding powder d is placed in advance on the repaired portion p and the tapered shape is obtained. By bringing one pole (S pole) of the pointed magnet piece b close to the welding pole, the welding powder d is concentrated so as to rise above the corner of the welding member e along the line of magnetic force, and the primary electrode a concerned is described above. It is inserted between the magnet piece b and the metal member e, moved while rolling, and locally holds down the welding powder d 1 to repeat point welding. Further, in the case of welding the ridgeline of the metal member e, as shown in FIG. 8B, an appropriate amount of welding powder d is placed along the ridgeline p to be repaired of the metal member e, and the magnet piece b is also brought close to the welding. The powder d 1 is raised from the ridgeline of the metal member e, and the primary electrode a is pressed against this welding powder d and moved along the ridgeline p to perform linear build-up welding.

[0004]

[Problems to be solved by the present invention]

 When using the primary electrode a in the above-described metal member welding apparatus according to the prior application, it is difficult to deposit only the necessary amount of fine-grained powdered welding powder d on the welding repair location p. In addition, a method of performing welding by concentrating the welding powder d on the repaired portion p by using the magnet piece b and performing the welding operation is such that one worker holds the magnet piece b in one hand and the primary electrode in the other hand. It is very troublesome to work while holding a. The magnet piece b becomes a hindrance in the welding repair work of a particularly fine portion.

Therefore, an object of the present invention is to improve the combination relationship between the primary electrode and the magnet in the welding apparatus for metal members disclosed in Japanese Patent Application No. 4-63701 filed by the present applicant. The purpose of the present invention is to provide a primary electrode in which the required amount of welding powder is surely adhered to the welding repair area and welding can be performed only by the operation of the primary electrode, and the welding work efficiency is improved.

[0006]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems of the prior art, the primary electrode in the welding apparatus for metal parts according to the present invention is electrically connected to the metal member 3 as shown in the embodiments in the drawings. The secondary electrode and the primary electrode 6 having a strength and shape capable of welding the fine powder welding powder 2 to the welding repair spot 1 and the large current of a predetermined magnitude between the primary and secondary electrodes are short-circuited. In a welding device for a metal member, which comprises a power supply device for energizing in a pulsed manner within a time, the primary electrode 6 is provided with a permanent magnet 4 (or an electromagnet) at a portion where welding powder 2 is attached and welding is performed. Characterize.

Further, the above-mentioned welding apparatus is also characterized in that the primary electrode 6 provided with a magnet is made of a non-magnetic material 5 except for a portion where welding powder 2 is attached and welding is performed.

[0008]

In the primary electrode 6, the permanent magnet 4 (or electromagnet) is provided at the portion where the welding powder 2 is adhered and welding is performed (FIGS. 1 and 2). Just by bringing the welding powder 2 close to it, a proper amount of the welding powder 2 can be attached by the magnetic action. Therefore, when the primary electrode 6 is moved to the welding repair location 1 of the metal member 3, the primary electrode 6 can be directly welded (FIG. 5).

When the primary electrode 6 provided with an electromagnet is used, the amount of the welding powder 2 attached can be adjusted by adjusting the strength of the magnetic force, and the welding powder 2 can be removed by stopping the energization. It can be removed from the electrode 6 cleanly. If the non-magnetic material 5 is used except for the portion of the primary electrode 6 provided with the permanent magnet 4 (or electromagnet) to which the welding powder 2 is attached (Fig. 4), only the portion necessary for welding is formed. Since the required amount of welding powder 2 adheres to and the unnecessary amount of welding powder 2 does not adhere to unnecessary parts, the welding work can be performed quickly and reliably (Fig. 6).

[0010]

【Example】

 Next, the illustrated embodiment of the present invention will be described. In the figure, reference numeral 1 denotes a primary electrode 6 having a strength and a shape capable of welding a fine powdered welding powder 2 to a welding repair spot 1. The primary electrode 6 produces a large current of about 300 to 1500 amperes between the secondary electrode electrically connected to the metal member 3 and the primary electrode 6 and the secondary electrode, which is 1/1000 to 4/1000. It is configured as a welding device for the metal member 3 together with a power supply device (not shown) that energizes in a pulse shape within a short time of about a second. The primary electrode 6 is made of a silver / tungsten alloy or the like in the shape of a round bar having a diameter of 5 mm and a length of about 30 mm. The primary electrode 6 is inserted into the tip of the conductor 8 and fixed by a set screw 7. The outer periphery of the conductor 8 is covered with an electrode holder 9 made of an insulating material such as hard rubber. Then, the primary side of the power supply device is connected to the primary electrode 6 in the form of a cord 10 via the conductor 8 (FIG. 3).

In this round rod-shaped primary electrode 6, a permanent magnet 4 is embedded inside the tip, which is a portion for welding the welding powder 2 to the metal member 3 (FIG. 2). The size of the permanent magnet 4 is such that a suitable amount of the magnetic welding powder 2 can be adhered to a necessary portion. For example, the primary electrode 6 having a diameter of 2 mm is preferably 1 mm in diameter and 5 mm in length. . Similarly, a diameter of 2 mm and a length of 5 mm is used for the primary electrode 6 having a diameter of 3 mm, and a diameter of 2 mm and a length of 10 mm is suitably used for the primary electrode 6 having a diameter of 4 mm. However, the size and shape are not limited to this, and for example, a 4 mm square shape can also be used. Further, the installation position and mode of the permanent magnet 4 are not limited to this.

Therefore, when this primary electrode 6 is used, an appropriate amount of welding powder 2 is easily attached to the outer peripheral surface thereof. Alternatively, as shown in FIG. 5, when the welding powder 2 added to the welding repair portion 1 of the metal member 3 is brought close to it, the welding powder 2 is concentrated by the magnetic action, and the welding powder 2 is surely and efficiently scattered without scattering. The welding powder 2 can be surely and promptly welded by using the primary electrode 6 as it is.

[0013]

[Different embodiments]

 FIG. 4 shows an embodiment of the primary electrode 6 suitable for welding and repairing the ridgeline of the metal member 3. The primary electrode 6 has a diameter of about 5 mm and a length of about 70 mm, and the permanent electrode 4 having a diameter of about 3 mm and a length of about 30 mm is provided inside the primary electrode 6. Moreover, in the primary electrode 6, the portion other than the portion of the good magnetic material 10 to which the welding powder 2 is adhered and welded is composed of the non-magnetic material 5 such as copper, aluminum or stainless steel (FIG. 4B). In addition, the installation mode of the permanent magnet 4 is not limited to this.

Therefore, according to the primary electrode 6, even when repairing the ridge portion of the metal member 3 as shown in FIG. 6, a good magnetic material around the outer periphery of the magnet 4 provided inside the primary electrode 6 is provided. The welding powder 2 necessary for welding adheres only to the 10th part, and the welding powder 2 does not adhere to the unnecessary part excessively (Fig. 4A), so that the welding work can be performed quickly and surely and the work efficiency can be improved. Of.

[0015]

Second Embodiment In each of the above-mentioned embodiments, it is also preferable to use an electromagnet instead of the permanent magnet 4, and it is possible to obtain the same effects as the above-mentioned embodiments. If an electromagnet is used, the amount and state of adhesion of the welding powder 2 to the primary electrode 6 can be freely controlled by adjusting the strength of the magnetic force, and by stopping the energization, the welding powder 2 has the convenience that it can be cleanly removed and collected.

[0016]

[Effects of the present invention]

 According to the primary electrode 6 in the metal member welding apparatus according to the present invention, the required amount of the welding powder 2 is directly welded to the primary electrode 6 or the welding repair portion 1 of the metal member 3 is reliably adhered to the welding. Moreover, since the welding work efficiency can be improved, the repaired parts generated in various expensive metal members 3 can be repaired and reused, which contributes to the smooth execution of daily work. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a primary electrode.

FIG. 2 is an enlarged view showing a magnet portion.

FIG. 3 is a sectional view of a primary electrode.

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a front view showing a welding procedure for a metal member.

FIG. 6 is a perspective view showing how to weld a ridgeline of a metal member.

FIG. 7 is a front view showing a conventional primary electrode.

8A and 8B are perspective views showing a conventional welding procedure.

[Explanation of symbols]

 3 Metal member 2 Welding powder 1 Welding repair spot 6 Primary electrode 4 Permanent magnet 5 Non-magnetic material

Claims (3)

[Scope of utility model registration request] 1. A secondary electrode electrically connected to a metal member, a primary electrode having a strength and shape capable of welding fine powder welding powder to a welding repair spot, and the primary and secondary electrodes. In a welding device for a metal member, which comprises a power supply device for supplying a large current of a predetermined magnitude in a pulse shape within a short time between the secondary electrodes, the primary electrode is a permanent magnet at a portion where welding powder is adhered to perform welding. A primary electrode in a welding device for a metal member, characterized in that: 2. The welding device for a metal member according to claim 1, wherein an electromagnet is provided at a portion of the primary electrode where welding powder is adhered and welding is performed.
Next electrode. 3. The metal member according to claim 1, wherein the primary electrode provided with a magnet is made of a non-magnetic material except for a portion where welding powder is adhered and welding is performed. Primary electrode in the welding equipment of.