JPS59183985A - Welding tip and its production - Google Patents

Abstract

PURPOSE:To enable mass production of a welding tip having high accuracy in reproducing the aiming position of an electrode wire by providing successively a large diameter hole and a small diameter hole from the root part side toward the tip end of a tip body, engaging and holding the tip end member at the top end, and forming a through-hole for the top end member at the top end and forming coaxially the through-hole of the top end member and the small diameter hole. CONSTITUTION:A screw 103 for attaching is disposed on the root part side of a tip body 1. A top end member 2 having wear resistance is punched with a through-hole 201 in the axial center part and is formed with plural engaging parts 3 to be engaged with the top end part of the tip body 1 on the outside surface. A top end member 2 is inserted into the bottomed hole 102 of the body 1 and a hard wire 3 of the diameter slightly smaller than the diameter in the hole 201 of the member 2 is inserted into the member 2 and the body 1. The tip is swaged from the top end thereof by a die 4 having a prescribed reducing hole. Then the top end of the body 1 is deformed and a large diameter hole 101 is reduced to provide a fit to the wire 3; moreover, the top end of the body 1 intrudes in the engaging parts 3 of the member 2 and is thus securely engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a welding torch l using a consumable electrode wire.
The present invention relates to an improvement in a welding tip to which the present invention is applied and a method for manufacturing the same.

In the prior art, this type of welding torch uses a welding tip with a hole diameter that corresponds to the consumable electric wire. Long-life products are desired.

In order to deal with this, for example, the method shown in FIGS. 1 and 1(b) has been proposed in the past. That is, the tip body and the tip member are integrated by caulking the tip of the tip body. In this case, for example, d I = 1. Q
When manufacturing a welding tip for use with electrode wires of m, a relatively high-precision machining process is required because a small-diameter drill, d2 = 4.1 to 1.2 mm, is used. Therefore, it is troublesome and is not suitable for mass production.

■ Since the hole is drilled with a small diameter drill, the hole is eccentric between the base and tip of the tip, and the eccentric direction of the hole relative to the tip body is often not at a constant position.

■ When caulking the tip of the tip body, do not
There are not enough fixing positions for the opposite tip (O). In other words, when crimping, the tip is fixed at a position offset in the radial direction with respect to the axis of the tip body, so the tip The holes in the 4 parts of the main body and the through hole in the tip member are coaxial!8
1. Don't say anything.

■ Due to the above ■ and ■, the hole in the tip body and the page through hole in the tip member are eccentric, and since this eccentricity is different for each welding tip, the d-junction tip must be When replacing with a new one, the feeding direction of the electrode wire fed through the welding tip changes.

That is, when replacing the welding tip, it is impossible to ensure the accuracy of the target position of the electrode wire, and therefore, this type of welding tip cannot be used with a D3 welding machine.

■ Furthermore, from the above ■ and ■I, since the wire passage of the welding tip (not in a straight line), the electrode wire is forcibly abutted against the inner wall of the passage of the welding tip, and therefore the magnetic pole wire can be fed smoothly. unable to maintain.

There was a drawback.

In addition to the above-mentioned methods, methods for attaching the tip member to the tip body include shrink fitting, adhesion, and a-attaching, but these attachment methods still have various problems. Ta.

That is, during welding, the tip of the welding tip is exposed to arc heat and kept in a high temperature state, and the electrode wire during welding adheres to the workpiece, so-called stick. This phenomenon often occurs and an unexpected impact force is applied to the tip member, and since the tip member has a different coefficient of thermal expansion and is chip-proof and wear-resistant, the shrink-fit or brazing condition may occur. There have been cases where the welding operation has to be interrupted because the tip member is detached from the tip due to excessive contact or the contact state is canceled due to evaporation of the adhesive. In particular, when attaching the tip member to the tip body with a solder, the tip of the welding tip is exposed to high temperature during welding due to the difference in thermal expansion coefficient between the tip member and the tip body. Since the tip member is kept in this condition, it is uncertain that the tip member is in a 1-m brazing condition, and furthermore, the brazing work is troublesome and has the disadvantage that it cannot be turned to ffl 1 m.

Purpose of the Invention The present invention has been made in view of the above problems, and includes:
When replacing the welding tip, the reproducibility of the aiming position of the electrode wire is high, and the placement of the 13 items at the tip can be carried out reliably.In addition, it is easy to process and can be mass produced, and the electrode wire is The purpose of the present invention is to provide a suffix tip with excellent feedability and a method for manufacturing the same.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to illustrated embodiments.

The chip body 1 is made of copper or Vi'A+B alloy as shown in the figure. A bottomed hole 1 is formed from the large diameter hole 1011.
02 are arranged r.

Note that the base side of the chip body 1, that is, the end 1 on the Y2 direction side, is provided with a screw 103 for Q-button (=I).
z tail. Reference numeral 2 denotes a tip member having regular wear and tear, and approximately 9 through holes 201 are provided at the axial center portion of the tip member 2, and the outer surface 1. III has a 1-point fitting portion 31 for engaging with the tip of the tip body 1, for example, a 4° tip portion.
A plurality of grooves extending in the axial direction are formed on the outer circumference of the shaft.

The tip member 2 is made of a metal alloy such as CU-W, for example.

In addition, the tip member 2 has an outer diameter of 5) 2 and an inner diameter of an appropriate recess (for example, DI D 2-0.5 He l
This) has been added. Insert this tip member 2 into the +T-bottomed hole 1021 of the tip body l, and then
A hard wire 3 having an inner diameter of d4 and an outer diameter of d5, which has a slightly smaller diameter, is inserted into the tip member 2s and the tip body i. Thereafter, the swaging process is relaxed from the tip to the center part I of the die 4 having a predetermined diameter-reducing hole and having a large diameter part, for example, 41 to 44. Swaging is performed gradually from the tip to the center of the tip body 1, but since the tip member 2 is restrained in the radial direction ζ by the hard wire 3, the tip member 2
The large-diameter hole 101 of the tip body 1 is narrowed inward to form a hard ta 31.
The completed state is jQ.

Sara d, the above-mentioned Nuezing processing, the tip body 1
As the sleeves narrow inward and become longer in the direction of long sleeves,
The tip of the tip body 1 enters the retaining portion 31 of the tip member 2, for example, a groove, and forms a strong surface.

Note that 5 is a support that moves relative to the die 4 in the axial direction together with the chip body 1 while making contact with the ff1ff1 part I of the chip body 1 in the Y2 direction. The end of the hard wire 3 in the Y2 direction is supported. Of course, the three hard wires located in the y direction and l direction from the tip member 2 are positioned in the radial direction by appropriate means.

As described above, after the swaging process is performed from the tip end of the chip body 1 to the desired central part f, the hard wire 3 is pulled out. After this, as shown in FIG. 6, it is preferable to remove the overhang formed at the tip end by swaging by an appropriate process, as this will increase the added value of the tip as a welding tip. . That is, by removing the protrusion at the tip end, there is no risk of injury to the operator, and the appearance of the product is improved.

The welding tip manufactured by the above method has a relatively long small diameter hole 104 formed from the approximately middle arrow part of the tip body 1 to the tip l, as shown in FIG. 6, for example. The hole 104 is formed by swaging the hard wire 3.
Since the small diameter hole 104 and the through hole 201 of the distal end member 2 are formed so as to fit in with each other, the small diameter hole 104 and the through hole 201 of the tip member 2 are arranged substantially coaxially.

In addition, this small diameter hole 104 is formed by swaging the hard wire 3.
1. Since the chip body is formed by integrating
The boundary between the large-diameter hole 101 and the small-diameter hole 104 is in communication with an appropriately inclined curved surface.

Figures 3tb) to 3e) are views showing essential parts of other embodiments of the present invention, in which the tip member 2 shown in Figure 1b) is attached to the outer periphery as a retaining part 3. An axial recess is formed. Figure '5g3 (c) The distal end member 2 shown in FIG. Furthermore, the distal end member 2 shown in FIG. 3 has a circumferential groove formed on the outer periphery as a connecting portion 3. As shown in FIG.

If the tip member is formed as shown in Section 3 1(a) to c), the tip member will be aligned in the long axis direction of the tip body and in the circumferential direction around the long i oil, so it will be reliable. It is possible to obtain a welding tip that is integrated with the two.

In addition, if the tip member is formed from a sintered metal plate made of Cu-■, the material cost will be reduced and the production of the sword will be easy. Since the welding tip can be attached to the electrode wire through the tip member while guiding the welding tip, it is possible to use the welding tip for a long period of time. Similarly, the tip member is made of Cu-Fe, Be
-Cu, Ag-Wf, G, or other suitable alloy member having wear resistance and relatively good conductivity can also be formed.

The mounting screw 103 on the base side of the torch body can be a threaded screw, and by arranging the mounting screw 103 in this way, it is easy to attach and detach the welding tip to and from the welding torch. Although this can be done reliably, the welding tip can also be configured to be detachable by other suitable means, such as a split clamp means, a set bolt 6, or a cap nut attachment means. Further, the retaining portion on the outer surface of the tip member may have a non-circular cross section or may have an appropriate groove, for example, a knurled groove.

As described above, according to the present invention, the tip body 1 enters into the retaining portion 3I of the tip member 2 and the tip member is attached to the tip portion of the tip body, so that the welding tip is placed at a high place during welding. Even if the tip is removed, there is no chance that the tip will separate from the tip body. Since the relatively long small-diameter hole 104 and the through-hole 201 of the tip part 1 are formed in the same direction, the path of the electrode wire as a welding tip is constant, and therefore new welding is possible. Even if the tip is replaced with a new one, the reproducibility accuracy of the target position of the electrode wire can be maintained at approximately the same level. Furthermore, the relatively long (small diameter hole A) 04 and the through hole 201 of the tip part example 2 are formed in the same manner.
1. Since the large diameter hole 101 and the small diameter hole 104 of the chip main body are connected by a slanted curved surface 1, the feedability of the wire is not hindered. do not have.

In addition, the hole to be drilled in advance in the chip body II is the large diameter hole 10.
1 is sufficient, there is less chance of drill breakage, and large-diameter holes in the tip body can be machined at relatively high speed. Since the hole diameter of the hole 102 can be approximately Illα, processing can be easily carried out, and as mentioned above, a chip for welding can be manufactured from one swaging process, so mass production is possible, and therefore it is inexpensive. Welding tips can be manufactured using

Effects of the Invention As described in detail in the above embodiments, according to the present invention, even when the welding tip is replaced, it is possible to maintain the reproducibility of the target position of the electrode wire approximately evenly, and the above 41 parts It is easy to process, mass-produces welding tips and can be manufactured at low cost, and has a long lifespan that is comparable to the feedability of the electrode wire. A welding tip can be used.

[Brief explanation of drawings]

Figures 1 (ta) and (tbl) are longitudinal cross-sectional views, respectively, of a pot explaining the manufacturing process of a conventional welding tip;
Figures 1 and 2 are main part views for explaining the pre-process of the welding tip of the present invention, in which Figure 2 shows a longitudinal section and Figure 3 shows a longitudinal section.
al t'j: A diagram showing a longitudinal half section, FIG. 3 tb) to te) respectively show essential parts of other embodiments of the present invention,
The figure corresponding to Figure Lal, Figure 4, shows the welding tip of the present invention! l! ! FIG. 5 is a vertical cross-sectional view for explaining the manufacturing process, FIG. 5 is a cross-sectional view taken along the v-v line of FIG. 4, and FIG. 6 is a partially cut-away front view of the welding tip of the present invention. l...Chip body, LOI...Large diameter hole, 102...
・Yes, 1f (shaped hole, 104... small diameter hole, 2... tip (shi, 201... through hole, 3... hard wire, 4...
·dice. Representative patent attorney Hiroshi Nakai's drawings (t#(
No change in content) ((+) (b) (c)
(d) (e) Figure 6 Commissioner of the Japan Patent Office 1. Indication of TTS Patent Application No. 58490 of 1988 2. Name of the invention Welding tip and its manufacturing method 3. Relationship with the amended person's case Patent Applicant: 2-1-11, Tayo, Yodoyo-ku, Osaka (026) Osaka Transformer Co., Ltd. 4, Agent Address: (j32, 2-1-11-5, Tayo, Yodoyo-ku, Osaka, Amended Order Date of departure -39'

Claims (1)

[Scope of Claims] A tip member is disposed, and the through hole drilled in the tip member and the small diameter hole are substantially the same.
A tip for bath contact, wherein the tip member is held by a thread joint between a retaining portion formed on the outer surface of the tip member and the tip body. 2. The tip 4 member is aligned with the long axis direction of the chip body and the circumferential direction centered on the long axis by the engaging portion. Chip. 3. 9 large-diameter holes are inserted in the approximate axis of the chip, and 1.
A bottomed hole communicating with the large diameter hole f is provided first,
A wear-resistant tip member with a small-diameter hole passing through the low-shaped hole is inserted, and a hard wire with a slightly smaller diameter than the small-diameter hole is inserted into the tip member and the tip body to form a predetermined shape. The large-diameter part of the die having a small diameter hole and the tip end of the tip are brought relatively close to each other in the axial direction, and the swaging process is performed from the tip of the tip to the center of the tip. The hole after the swaging process of the drilled hole which is widened by 1 in the center part and the through hole of the tip member are formed substantially coaxially, and the outer surface of the tip member is formed. A method of manufacturing a welding tip in which a tip member is held on a tip body by means of engagement between an engaging portion and four tip tips.