JP3135171B2 - Method of joining link member consisting of wound collar and bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a link member consisting of a collar and a bar, and more particularly to a welding method for securely joining another member to a groove to be formed.

[0002]

2. Description of the Related Art Rotatably or swingably mounted,
As one of the members for supporting the member and transmitting the load, there is a link member 10 as shown in FIG. 4, which comprises a cylindrical collar 11 and a rod 13 welded to the side surface of the collar 11. Such a link member is used in a motor vehicle, for example, as a tension rod connected to a support arm of a knuckle arm to which wheels are attached. The tension rod is used by being supported by a vehicle body in a collar, and the collar is generally connected to the vehicle body via a cushioning material such as rubber inserted into the inside of the collar.

[0003] As shown in the figure, a cylindrical collar 11 formed by winding a plate material has a contact portion or abutting portion 17 at both butted end faces abutted by winding, and is provided on the side surface of the cylinder. It has a communication hole 19. The communication hole 19 is a hole provided for positioning. By engaging a jig (not shown) with the communication hole 19, the position of the butted portion of the collar 11 is determined. Therefore, by setting the positioning position of the collar 11 so that the abutting position of the bar 13 becomes the abutting portion of the collar 11, the bar 13
Can be reliably abutted at a position straddling the abutting portion 17 of the collar 11. After the bar 13 is abutted against the collar 11 in this manner, the collar 11 and the bar 13 are arced by an automatic welding machine or the like along the contact surface of the bar 13 with the collar 11, that is, along the outer periphery of the joint end surface 21. Welded link member 1
0 is formed.

[0004]

However, when the collar formed from the plate material is a relatively thick collar, in order to bring the butted end surfaces of the butted portion into surface contact with each other, the two butted ends of the plate material to be wound are formed. It is necessary to process both butted end faces of the plate material before winding so that the end faces come into surface contact with each other after winding, which increases the number of processing steps and production cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to easily and surely push a bar into a position straddling a V-shaped groove formed at a butt portion of a collar. It is an object to provide a welding method for welding between.

[0006]

In order to achieve the above object, the present invention provides a collar formed into a cylindrical shape by winding a strip-shaped plate and abutting both end surfaces of the plate, and a butt portion of the collar. A method of joining a link member consisting of a bar material to be welded and joined, wherein a V-shaped groove opened from the inside to the outside of the collar at the butting portion of the collar by winding the plate material. Forming, and abutting the joining end surface of the bar material over the V-shaped groove formed in the abutting portion, on the abutting portion of the collar, the abutting portion of the collar, A position where the outer periphery of the joining end face of the bar struck across the butt portion intersects is defined as at least one of a start position and an end position of the welding process, and Is a bonding method of the link member comprising a winding collar and bars, characterized in that a step of welding the outer peripheral portion of the serial joining end face.

[0007]

The collar is formed by winding the plate material, and a V-shaped groove is formed at the abutting portion of the collar from the inside to the outside of the collar. Thereafter, the joining end surface of the bar is struck over the butting portion and straddles the outer periphery of the joining end surface. Then, at the outer peripheral portion of the joint end surface to be welded, at the position intersecting the V-shaped groove, the three portions of the butted butted surfaces and the butted bar material are integrally joined. In addition, since the intersection position between the groove and the outer peripheral portion of the joining end face is welded as the welding start position or welding end position or both the start and end positions, the moving speed of a member to be moved at the time of welding, such as a welding torch or a work piece, Is maintained at a constant speed as before, and the intersection between the groove and the outer peripheral portion of the joining end face is welded with sufficient strength.

[0008]

Next, an embodiment of the joining method of the present invention will be described with reference to the drawings. Note that the same reference numerals are given to members common to the members already described. As shown in FIGS. 1A and 1B, a link member 10 joined by an embodiment of the joining method of the present invention has a cylindrical winding collar 11.
have. The winding collar 11 is formed into a cylindrical shape by winding and forming a plate material (not shown) and abutting both butted end faces of the plate material. , V-shaped groove is formed. Also, as shown in FIG.
Of the winding collar 11
And the bar 13 are welded and joined along the outer periphery of the joining end face 21.

A procedure for joining such a link member comprising a wound collar and a bar by the joining method of this embodiment will be described below. First, a plate material (not shown) is wound and formed into a wound collar 11. At this time, as shown in FIGS. 1A and 2, a V-shaped groove is formed at the butting portion 17 of the winding collar 11. In the case where the plate material used is relatively thick compared to the diameter of the winding collar to be formed as in this embodiment, a particularly remarkable V-shaped groove is formed at the abutting portion. After the winding collar 11 is formed, the joining end face 21 of the bar 13 is abutted against the butting portion 17 of the winding collar 11. At this time, the joint end face 21 of the bar 13 is positioned at a position straddling the V-shaped groove formed in the butting portion 17 as shown in FIG.

In this manner, the bar 13 is wound around the collar 11
Then, the joint between the two members 11, 13 is welded and joined by arc welding. In the first joining step,
First, the tip of the torch of the arc welding machine (not shown) is connected to the butt 17 of the winding collar 11 and the joining end face 21 of the bar 13.
Start position 25, which is one of the positions where the outer circumference of
Positioning close to The welding start position is appropriately selected from any of the positions where the butted portion 17 and the outer periphery of the joining end face 21 intersect.

When the positioning of the torch is completed, welding of the outer peripheral portion of the joint end face 21 is started. In the first joining step, first, the torch is held at the first positioning position for a predetermined time, and welding at the welding start position 25 is performed. Thus, the first
By holding the torch at the welding start position 25 which is the starting point of the joining process, the V-shaped groove at the welding start position 25
A sufficient amount of the weld bead 26 can be filled. Therefore, at the welding start position 25, the butting surfaces of the winding collar 11 and the butting portion 17 and the bar 13 can be reliably welded. The torch holding time is a value determined by welding conditions and the like.

When a predetermined time has elapsed from the start of welding and the operation of holding the torch is completed, the torch is moved at a constant speed in the direction of arrow A in FIG. And the bar 13 are welded. The torch may be fixed and the member to be welded may be moved. The first joining process proceeds, and the butted portion 17 and the joining end face 2 of the bar 13 are joined.
When the torch moves to a position where the outer periphery of the torch 1 intersects and welds to the other point of the welding start position 25, that is, a relay position 27 which is a point opposite to the welding start position, the torch is moved to this position by a predetermined amount. After holding the time, the V-shaped groove at the relay position 27 is filled with a sufficient amount of beads 26,
Welding surely.

When the first joining step is completed, a second joining step is performed starting from the relay position 27. First, the tip of the torch is positioned at a position close to the relay position 27.
Thereafter, the torch is moved at a constant speed in the direction of arrow B shown in FIG.
1 and the bar 13 are welded. When the welding is advanced and the welding is completed up to the welding start position 25 which is the starting point of the first joining step, the second joining step is ended.

[0014] The arc welding performed in the first joining step and the second joining step may be arc welding in which welding is performed intermittently. Further, the starting point of the welding in the second joining step is set to the welding starting position 25 which is the starting point of the welding in the first joining step.
The second joining step may be performed by moving the torch in a direction opposite to the direction of the arrow B. In the above-described embodiment, the operation of holding the torch at a fixed position and welding the relay position 27 is performed at the end of the first joining process, but may be performed at the beginning of the second joining process. In each of the first joining step and the second joining step, an operation of welding the relay position 27 while holding the torch at a fixed position may be performed.
Similarly, the operation of welding the welding start position 25 while holding the torch is performed at the beginning of the first joining step, but this operation may be performed at the end of the second joining step.

Further, the first bonding step and the second bonding step may be performed continuously. In this case, the relay position 2
7, the welding operation is not interrupted. That is, when the torch moving in the direction of arrow A reaches the position where the relay position 27 is welded, the torch is held at that position in the welding operation state for a predetermined time, and after this holding time has elapsed,
The torch moves in the direction of the arrow B again at the set speed.

Further, a bar 13 joined to the winding collar 11
Is not limited to only the rod having a circular cross section used in the embodiment, but may be variously changed, for example, an elliptical cross section, a polygonal cross section, or a hollow cross section. In other words, even when using a hollow rod,
In the joining method of the present invention, since the weld bead is filled in the V-shaped groove formed in the butting portion 17, a link such as a tension rod generally used by press-fitting the insulator into the inside of the winding collar is used. In the member, no foreign matter or the like enters the hollow portion of the bar, so that the inside of the hollow bar does not corrode.

The manufactured link member has various uses. For example, in an automobile, a tension rod or an anchor arm for supporting a torsion bar on the vehicle body side can be cited as an application example. In addition, the link member is used not only as a member requiring relatively high strength as described above, but also as a member not requiring much strength, such as a pedal support member for supporting a pedal such as an accelerator pedal. Also applicable to

[0018]

As described above, according to the present invention, since the welding start position and / or the welding end position is set to the position where the butted portion of the winding collar and the outer periphery of the joining end face of the bar intersect, the position of the intersection is determined. Welding quality can be made stable and high quality.

[Brief description of the drawings]

FIG. 1A is a front view showing a link member, and FIG.
(B) is a side view showing the link member,

FIG. 2 is an enlarged sectional side view showing a joint between a winding collar and a rod material.

FIG. 3 is a bottom view showing the link member shown in FIG.

FIG. 4 is a perspective view showing a conventional link member.

[Explanation of symbols]

10 ... Link member 11 ... Wound collar 1
3: Bar material 17: Butted portion 21: Joined end face 2
5 ... welding start position 26 ... welding bead 27 ... relay position

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 6-9957 (JP, U) JP 2-42767 (JP, U) JP 2-123378 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B23K 9/00 B23K 9/028 B23K 31/00

Claims (1)

(57) [Claims] 1. A method of joining a link member comprising a collar formed by winding a strip-shaped plate material and abutting both end surfaces of the plate material to form a cylindrical shape, and a bar material welded to the butt portion of the collar. A step of forming a V-shaped groove that opens from the inside to the outside of the collar at the butting portion of the collar by winding and forming the plate material; Abutting the joining end face of the bar material over the V-shaped groove formed in the portion, the butting portion of the collar, and the joining end face of the bar material striking the striking portion. Welding the outer peripheral portion of the joint end face of the bar as a position where the outer periphery intersects at least one of a start position and an end position of a welding process. A method for joining a link member comprising a wound collar and a bar.