JP2012096291A - Joining tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining tool capable of easily carrying out installing operation of tab plates while properly preventing the opening between metal elements.SOLUTION: The joining tool used when joining the end parts of an abutting part TW between the metal elements W1, W2 by heat machining with the tab plates 70 arranged in the same has a sandwiching unit 20 sandwiching the tab plates 70 between supporting parts 13, 13 for supporting the tab plates 70, and further has a holder 40 pushing and holding the end parts of the metal elements W1, W2 toward the abutting part TW.

Description

  The present invention relates to a joining jig used for joining by thermal processing.

  A method of joining a butt portion by applying heat processing to a butt portion between metal elements is widely known. The thermal processing includes melting (welding) by means of electricity, arc discharge, laser beam, electron beam, etc., as well as friction stirring.

  By the way, if thermal processing is continuously performed on the abutting portions between the metal elements, there is a possibility that defects may occur at the start position and the end position of the thermal processing. (Abutting member) may be arranged, and the thermal processing start position or end position may be positioned on the tab material (see, for example, Patent Document 1 and Patent Document 2).

JP 2004-050281 A JP 2005-66669 A

By the way, when the metal elements to be joined by thermal processing are hollow shapes, etc., the metal elements are three-dimensional compared to when they are flat plates, so the installation position of the tab plate is also at the butt portion of the shape It is necessary to bring it to a higher position. As a technique for that purpose, conventionally, a technique of temporarily fixing a tab plate to the end of the abutting portion by welding or the like has been adopted.
However, such temporary fixing requires experience and skill when the metal element and the tab plate are different materials, and the work efficiency is not always good.
Moreover, at the time of joining by heat processing, if the abutting portions of the metal elements are not brought together well, there is a possibility that an opening or a mistake may occur. In addition, the above-mentioned subject is applied not only when a metal element is a hollow shape material etc. but when it is another metal element.

  From such a viewpoint, the present invention is a joining jig used when joining the abutting portions by applying heat processing to the abutting portions between the metal elements, and the mesh between the metal elements is opened. It is an object of the present invention to provide a joining jig capable of simply performing a tab plate installation operation while suitably preventing it.

  A joining jig according to the present invention that solves such a problem is a joining jig that is used when a tab plate is disposed at the end of a joining portion between metal elements and joined by thermal processing. And supporting means for supporting the tab plate, and clamping means for clamping the tab plate between the support portions, and further pressing and holding the end portion of the metal element toward the abutting portion. The holding means is provided.

According to the joining jig according to the present invention, since the clamping means for clamping the tab plate is provided between the supporting portion and the supporting portion, the tab plate is suitably held in a state of being pressed against the supporting portion. As a result, misalignment of the tab plate on the support portion or the like is suppressed, and high-quality thermal bonding using the tab plate can be realized.
Moreover, since the end of the metal element is pressed and held by the holding means toward the abutting portion, the opening between the metal elements is suitably prevented, and defects are less likely to occur and the quality is good. Bonding by thermal processing can be realized.
The above-mentioned “thermal processing” includes not only melting by electricity, arc discharge, laser beam, electron beam, but also friction stirring.

  In particular, when the thermal processing is frictional stirring, the tab plate can be constrained to a predetermined position at the end of the abutting portion so as to be able to withstand the strong pressing of the tool, and high-quality thermal processing joining can be obtained.

  Further, in the joining jig, the metal element includes a hollow portion, and the holding means abuts from a side to a partition portion that partitions the hollow portion so that the metal elements are directed toward the abutting portion. It is good to make it the structure which press-holds by tightening. By configuring in this way, the metal elements can be clamped and held together by using the partition part that partitions the hollow part of the metal element, and it is possible to suitably prevent the opening and misalignment at the end of the abutting part. It becomes possible.

  Further, the joining jig includes a fixing means to the gantry on which the metal element is mounted, and the fixing means also serves as a restraining means for restraining the end side of the metal element to the gantry. It is good to have a configuration. According to such a joining jig, the end portion side of the metal element can be constrained to the gantry using the fixing means, so that the vertical movement on the end portion side of the metal element can be suitably prevented. Moreover, since the restraining of the metal element on the end frame side of the metal element by such fixing means can be performed simultaneously when fixing the joining jig to the frame, there is an advantage that the work efficiency is good.

  Further, the fixing means and the clamping means are preferably provided directly on the gantry. With this configuration, the structure can be simplified and the weight can be reduced, and the attachment work and the removal work with respect to the gantry can be easily performed.

  According to the joining jig according to the present invention, it is possible to simply perform the tab plate installation operation while suitably preventing the opening of the metal elements.

The bonding jig | tool which concerns on 1st Embodiment of this invention is shown, (a) is a front view, (b) is a top view, (c) is a side view. It is an exploded perspective view similarly. (A) is a perspective view for demonstrating a restraint process, (b) is a perspective view for demonstrating an attachment process. (A)-(c) is explanatory drawing for demonstrating the effect | action of the clamping means in a press process. (A)-(c) is explanatory drawing for demonstrating the effect | action of the press means in a press process. It is a perspective view for demonstrating an effect | action of the press means in a press process. It is a perspective view which shows the attachment state to a mount frame. (A) (b) is explanatory drawing for demonstrating the effect | action in a heat processing process. The joining jig | tool which concerns on 2nd Embodiment of this invention is shown, (a) is a front view, (b) is a top view, (c) is a side view. It is a perspective view of the jig body for joining. It is a perspective view which shows the attachment state to a mount frame.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. Moreover, in the following embodiment, although a hollow shape is illustrated as a metal element joined, the metal element to which the joining jig | tool which concerns on this invention is applied is not the meaning limited to this. In the following description, “front / rear / left / right / up / down” is based on the direction shown in FIG.
(First embodiment)
In the drawings to be referred to, FIG. 1 shows a joining jig according to a first embodiment of the present invention, (a) is a front view, (b) is a plan view, (c) is a side view, and FIG. It is an exploded perspective view similarly.

  As shown in FIGS. 1A to 1C, the joining jig of the present embodiment joins the abutting portions TW between the metal elements W1 and W2 (see FIG. 1B, the same applies hereinafter) by thermal processing. The tab plate 70 (see FIG. 2; the same shall apply hereinafter) is installed on the side of the end of the abutting portion TW of the metal elements W1 and W2 and placed at a predetermined position of the end of the abutting portion TW. ).

The metal elements W1 and W2 are restrained and placed on a flat base (bed) K constituting the friction stir welding apparatus in a state where the facing side surfaces are butted together to form the abutting portion TW (FIG. 3 ( a)). Here, in the metal elements W1 and W2, hollow portions S1 and S2 partitioned by a partition portion W3 (see FIG. 1A and FIG. 3A) are formed.
The joining jig is mainly composed of a pair of left and right support columns 1 and 1 erected on the gantry K and a base 10 provided on the support pillars 1 and 1. It has. A support portion 13 for supporting the tab plate 70 from below is recessed on the upper surface of the base portion 10. Further, the base 10 has a clamping means 20 for clamping the tab plate 70 supported by the support portion 13 between the support portion 13 and the tab plate 70 toward the end of the abutting portion TW of the metal elements W1 and W2. And pressing means 30 for pressing and holding means 40 for pressing and holding the metal elements W1 and W2 toward the abutting portion TW.

  The support pillars 1 and 1 constituting the joining jig body H are made of tool steel, and as shown in FIG. 2, a rectangular bar-like fixing member 3 extending in the left-right direction is fixed. The fixing member 3 has a length extending to the left and right sides of the support columns 1, 1, and the fixing member 3 including the extended portion is separated from the joining jig body H. A clamp arm 52 for fixing a fixing means 50 which will be described later and is provided directly on the gantry K is pressed. The fixing member 3 is not limited to one having a length extending to the left and right sides of the columns 1, 1, but has a length extending only between the columns 1, 1, You may use what is each provided individually in the lower part.

  The base 10 is made of tool steel and has a substantially rectangular parallelepiped shape. A support portion 13 is recessed in the central portion of the upper surface 10A of the base portion 10, and support surfaces 12, 12 formed one step higher than the support portion 13 are provided on the left and right sides of the support portion 13, respectively. Further, on the left and right sides of the support surfaces 12, 12, fulcrum portions 11 a, 11 a formed higher than the support surfaces 12, 12 are provided. Further, on the front end side of the side surfaces 10C and 10C (only one side is shown in FIG. 2) of the base portion 10, there is a fulcrum portion 11c for supporting the other end portion 45 of the clamp arm 42 for pressing and holding described later. It protrudes over the top and bottom.

  The support portion 13 is recessed over the front surface 10A of the base portion 10 so that the tab plate 70 can move in the front-rear direction of the base portion 10 on the support portion 13 and cannot move in the left-right direction. Has come to be supported. The tab plate 70 is sized so that the front portion and the rear portion thereof protrude from the front and rear of the support portion 13 while being supported by the support portion 13. Has been made possible.

Mounting holes 12a and 12a are formed in the support surfaces 12 and 12, and a support shaft 21 to be described later is sandwiched and fixed in the mounting holes 12a and 12a.
The clamping means 20 includes a support shaft 21, a clamping clamp arm 22 through which the support shaft 21 extends, a washer 28, and a nut 29 fastened to the support shaft 21.
Both ends of the clamp arm 22 for clamping are tapered, and a long hole 23 through which the support shaft 21 is inserted is provided in the central portion along the longitudinal direction. It plays a role of pressing against the support part 13. As shown in FIG. 2, the long hole 23 is formed closer to the other end 25 side than the one end 24 side of the clamping arm 22, and is clamped between the one end 24 side and the other end 25 side. The amount of slide movement of the arm 22 is made different.

  For example, such a clamping clamp arm 22 has the other end 25 side placed on the fulcrum portion 11a of the base 10 and the one end 24 side placed on the upper surface of the tab plate 70 placed on the support portion 13. Arranged in contact. Then, when the nut 29 is tightened, the clamp arm 22 is pressed in the direction of the arrow Y1 in FIG. 4C with the end portion 24 side as a fulcrum at the contact portion with the fulcrum portion 11a of the base portion 10, whereby one end portion The tab plate 70 is sandwiched between the support 24 and the support portion 13 substantially immovably. Further, when the clamping state by the clamp arm 22 is released, it can be easily performed by loosening the nut 29.

The pressing means 30 includes a support shaft 31 screwed and fixed to a mounting hole 10 b formed in the front surface 10 </ b> B of the base 10, a pressing member 32 through which the support shaft 31 penetrates, a washer 38, and the support shaft 31. A nut 39 to be fastened is provided.
The pressing member 32 is formed in a substantially U shape (see FIG. 1C) when viewed from the side, and includes a through hole 33 through which the support shaft 31 passes, and a lower end portion 34 that comes into contact with the front surface 10 </ b> B of the base portion 10. And an upper end portion 35 disposed in a state of protruding above the support portion 13 of the base portion 10. Such a pressing member 32 is arranged so that the front end portion 70 a of the tab plate 70 is engaged with the upper end corner portion 35 a of the upper end portion 35 while being supported by the support shaft 31.

  In such a pressing member 32, when the nut 39 is tightened, the lower end portion 34 comes into contact with the front surface 10B of the base portion 10, and the upper end portion 35 side covers the support portion 13 with the contacted lower end portion 34 side as a fulcrum. It rotates in a direction (a direction in which the upper end portion 35 side approaches the abutting portion TW). Thereby, the tab plate 70 latched by the upper end corner portion 35a of the upper end portion 35 of the pressing member 32 is pressed toward the end portion of the abutting portion TW of the metal elements W1, W2. Further, when the pressing state by the pressing member 32 is released, it can be easily performed by loosening the nut 39.

The holding means 40 is provided on each of the left and right side surfaces 10C and 10C of the base portion 10, and is configured to press and hold the end portions of the metal elements W1 and W2 toward the abutting portion TW as described later. In the present embodiment, a total of four holding means 40 are provided on the left and right side surfaces 10C, 10C of the base portion 10. Since each holding means 40 is comprised from the same member, the one is demonstrated here as an example.
The holding means 40 includes a support shaft 41 that is screwed into a mounting hole 10c formed in the side surface 10C, a clamping arm 42 for fastening the support shaft 41, a washer 48, and a support shaft 41. A nut 49 to be fastened is provided.

  The clamp arm 42 for pressing and holding has the same basic configuration as the clamp arm 22 of the clamping means 20 described above, and is generally larger in size than the clamp arm 22. As described above, the clamp arm 42 is provided with a long hole 43 along the longitudinal direction. The long hole 43 is formed closer to the other end 45 side than the one end 44 side of the clamp arm 42 so that the slide movement amount of the clamp arm 42 differs between the one end 44 side and the other end 45 side. Has been.

  Such a clamp arm 42, for example, abuts the other end portion 45 side from the fulcrum portion 11c of the side surface 10C of the base portion 10 from the side and inserts the one end portion 44 side into the hollow portion S1 of the metal elements W1, W2. Then, it is arranged in contact with the partition portion W3 from the side. Then, when the nut 49 is tightened, the clamp arm 42 is pressed in the direction of the arrow X1 in FIG. 3B with the one end 44 side as a fulcrum at the contact portion with the fulcrum part 11c of the base part 10. As a result, the nuts 49 of the left and right holding means 40 are tightened, so that the clamp arms 42 arranged on the left and right of the base 10 press and hold the metal elements W1 and W2 toward the abutting portion TW. . It should be noted that the tightening state by the clamp arm 42 can be easily performed by loosening the nut 49.

  The fixing means 50 is for fixing the joining jig body H to the gantry K. In this embodiment, the fixing means 50 has end portions of the metal elements W1, W2 in addition to the fixing function. It also has a restraining function (restraining means) for restraining the side toward the mount K. Specifically, the fixing means 50 is provided separately from the joining jig main body H and is provided on the gantry K side, and a supporting shaft 51 screwed and fixed to an attachment hole K1 provided in the gantry K. The clamp arm 52 for fixing the support shaft 51, a washer 58, and a nut 59 fastened to the support shaft 51 are provided.

  The clamp arm 52 has the same basic configuration as the clamp arm 22 of the holding means 20 and the clamp arm 42 of the holding means 40 described above, and the end side of the metal element W1 (W2) is connected to the gantry K on one end 54 side. The fixing member 3 of the joining jig main body H is constrained to the gantry K on the other end 55 side. In the center portion of the clamp arm 52, a long hole 53 is provided along the longitudinal direction in the same manner as described above. Also in this clamp arm 52, the long hole 53 is formed closer to the other end 55 side than the one end 54 side of the clamp arm 52, and the sliding movement amount on the one end 54 side is closer to the other end 55 side. It is designed to be larger than the slide movement amount.

  Such a clamp arm 52 is held by the support shaft 51 in a state where the support shaft 51 is inserted through the elongated hole 53, and one end portion 54 side is inserted into the hollow portion S1 of the metal elements W1 and W2 and arranged on the bottom surface. At the same time, the other end 55 side is arranged in contact with the upper surface of the fixing member 3. When the nut 59 is tightened, the one end 54 side of the clamp arm 52 presses the end of the metal element W1 (W2) against the gantry K, and the other end 55 presses the fixing member 3 against the gantry K. As a result, these are immovably restrained with respect to the gantry K. In addition, by loosening the nut 59, these restraints can be released, and the joining jig body H can be easily detached from the gantry K.

  As a device for fixing the metal elements W1, W2 to the gantry K, a clamp device 80 is provided on the gantry K at a predetermined interval along the longitudinal direction of the metal elements W1, W2, as shown in FIG. Is installed. The clamp device 80 includes a support shaft 81 screwed and fixed in a mounting hole K3 provided in the gantry K, a clamp arm 82 having a long hole 83 through which the support shaft 81 passes, and the other end of the clamp arm 82. The support body 86 which supports the part 85 side, a washer 88, and the nut 89 fastened to the spindle 81 are comprised. The clamp arm 82 has the same basic configuration as the above-described clamp arm 22 and the like, and is arranged such that one end 84 side is in contact with the upper surface of the metal element W1 (W2), and the other end 85 side is on the support 86. It arrange | positions so that it may be supported by. Then, the clamping device 80 tightens the nut 89 so that the contact portion between the other end 85 of the clamp arm 82 and the support 86 serves as a fulcrum and the one end 84 is pressed against the upper surface of the metal element W1 (W2). To act. As a result, the metal element W1 (W2) is restrained to the gantry K by the clamp device 80.

  Further, a plurality of constraining blocks 90 (only one side is shown in FIG. 2) are installed from the side along the longitudinal direction of the metal elements W1 and W2 on the mount K, and the metal elements W1 and W2 are It is also restrained from the side. Note that a clamping device (not shown) that generates a pressing force by a hydraulic cylinder or the like may be installed on the gantry K so as to restrain the metal elements W1 and W2 from the side.

Next, friction stir welding using the welding jig according to the present embodiment will be described.
In the friction stir welding described below, the metal elements W1 and W2 are abutted and restrained (see FIG. 3A), and the side of the end of the abutting portion TW of the metal elements W1 and W2 is joined. An attachment step for attaching the jig body H, a holding step for pressing and holding the end portions of the metal elements W1 and W2 toward the abutting portion TW, and a tab plate 70 on the support portion 13 of the joining jig body H. A pressing step for supporting and pressing the butt portion TW toward the abutting portion TW, and a thermal processing step for continuously performing the heat processing on the abutting portion TW between the metal elements W1 and W2 (see FIGS. 8A and 8B). ), A removal step of removing the joining jig main body H from the gantry K, and a removal step of removing the tab plate 70.

  In the restraining step, the two metal elements W1 and W2 are brought into contact with each other and restrained on the gantry K so as not to move. Specifically, as shown in FIG. 3A, the side surfaces of the two metal elements W <b> 1 and W <b> 2 are brought into contact with each other and placed on the gantry K and restrained by being pressed by each clamp device 80. Then, the constraining block 90 is routed from the left and right sides of the two metal elements W1 and W2 (only one of them is shown) and fixed on the frame K, and the metal elements W1 and W2 are fixed from both sides. to bound.

  In the attaching step, as shown in FIG. 3B, the joining jig body H is attached to the sides of the end portions of the metal elements W1, W2. For attachment, first, the joining jig main body H is disposed at a predetermined position on the side of the ends of the metal elements W1 and W2, and the clamp arm 52 of the fixing means 50 is rotated around the support shaft 51 (see FIG. 2). The one end 54 of the clamp arm 52 is inserted into the hollow portion S1 of the metal elements W1 and W2 and disposed on the bottom surface, and the other end 55 side of the fixing member 3 of the bonding jig body H is moved. Place it in contact with the top surface. And after arrange | positioning the clamp arm 52 of each fixing means 50 similarly, each nut 59 is tightened sequentially. Then, each nut 59 is tightened, and the one end 54 side of the clamp arm 52 presses the bottom surface of the end of the metal elements W1 and W2, and the other end 55 side is the fixing member 3 of the joining jig main body H. Press the top surface of. As a result, the fixing member 3 is constrained to the gantry K, and the ends of the metal elements W1, W2 are constrained to the gantry K. That is, by performing one operation of tightening the nut 59, the ends of the joining jig main body H and the metal elements W1, W2 can be simultaneously restrained to the gantry K.

  Here, the support shaft 51 is screwed and fixed in advance to a mounting hole K1 provided at a predetermined position of the gantry K so as to correspond to the dimensions of the metal elements W1 and W2. Depending on the case, as shown in FIG. 2, the support shaft 51 may be screwed and fixed to a mounting hole K2 provided on the side of the mounting hole K1, and can be selected as appropriate.

  In the holding step, as shown in FIG. 3B, the end portions of the metal elements W1, W2 are pressed and held toward the abutting portion TW using the holding means 40. Specifically, the other end 45 side of the clamp arm 42 of the holding means 40 is brought into contact with the fulcrum portion 11c of the side surface 10C of the base 10 from the side, and the one end 44 side is the hollow portion S1 of the metal elements W1, W2. And the nut 49 is tightened after it is brought into contact with the partition portion W3 from the side. Then, the clamp arm 42 is pressed in the direction of the arrow X1 in FIG. 3B with the one end 44 side as a fulcrum at the contact portion with the fulcrum part 11c of the base 10. Accordingly, the end portions of the metal elements W1 and W2 are clamped and held by the clamp arms 42 arranged on the left and right of the base portion 10 toward the abutting portion TW, and the opening of the abutting portion TW, particularly the end of the abutting portion TW Opening or misinterpretation at the part is suitably prevented.

In the pressing step, the tab plate 70 is placed on the support portion 13 of the joining jig main body H and pressed toward the ends of the abutting portions TW of the metal elements W1 and W2. Specifically, first, the tab plate 70 is placed on the support portion 13 of the base portion 10 of the bonding jig main body H (see FIG. 4A), and the clamp arm 22 and the support portion 13 of the clamping means 20 are used. The tab plate 70 is clamped. When placing the tab plate 70 on the support portion 13, as shown in FIG. 5A, the nut 39 of the pressing means 30 is loosened in advance so that the tab plate 70 does not interfere with the pressing member 32. The member 32 is inclined toward the front side of the base 10.
Then, as shown in FIG. 4B, the one end 24 side of the clamp arm 22 is lifted while the other end 25 of the clamp arm 22 is placed on the fulcrum 11a. The one end 24 is positioned on the upper surface of the tab plate 70 while moving to the tab plate 70 side using the long holes 23. When the nut 29 is tightened in this state, the clamp arm 22 is pressed on the one end 24 side in the direction of the arrow Y1 in FIG. 4C with the contact portion with the fulcrum 11a of the base 10 as a fulcrum. And the support part 13 hold the tab plate 70. Here, the tightening degree of the nut 29 is adjusted to a strength by which the tab plate 70 is pressed and moved toward the end portions of the abutting portions TW of the metal elements W1 and W2 by the pressing means 30 described below.

Next, as shown in FIG. 5A, while lightly tightening the nut 39 of the pressing means 30 by hand or the like, the pressing member 32 is brought closer to the base 10 side, and the tab plate 70 is moved to the upper end corner 35 a of the pressing member 32. The front end portion 70a is locked. Thereafter, the nut 39 is fully tightened. Then, the pressing member 32 rotates with the lower end portion 34 as a fulcrum, and the upper end portion 35 moves in the direction of the arrow X2 in FIG. 5C and presses the tab plate 70 with the upper end corner portion 35a. As a result, as shown in FIG. 6, the tab plate 70 is pressed toward the abutting portion TW, and the rear end portion 70b of the tab plate 70 is strongly pressed against the end portion of the abutting portion TW so as to be in close contact without opening. .
Here, since the tab plate 70 is clamped to the support portion 13 by the clamp arm 22 of the clamping means 20, the tab plate 70 is in close contact with the support portion 13 even during the pressing by the pressing means 30, and the lifting is prevented. The end portion of the abutting portion TW is strongly pressed and held.

Then, after pressing by the pressing means 30, the nut 29 of the clamping means 20 is tightened to restrain the tab plate 70 so that it cannot move relative to the support portion 13.
As a result, as shown in FIG. 7, the tab plate 70 is suitably disposed so as to be immovable by the joining jig on the side of the end portion of the abutting portion TW of the metal elements W1, W2. Note that the position of the support portion 13 and the position and number of the pressing members 32 may be appropriately changed according to the shape and size of the metal elements W1 and W2.

  In the thermal processing step, as shown in FIG. 8A, friction agitation is continuously performed on the abutting portion TW. Specifically, the rotary tool P as a tool is rotated, and the stirring pin P1 is inserted (press-fitted) into a start position (not shown), and the inserted stirring pin P1 is moved along the abutting portion TW without being removed halfway. The friction stir is continuously performed on the abutting portion TW by moving along the friction stir route set as described above, and further, exceeding the abutting portion (joint) between the end portion of the abutting portion TW and the tab plate 70. Then, after continuously stirring the friction to the end position P1 ′ provided on the tab plate 70, the rotary tool P may be detached upward at the end position P1 ′ as shown in FIG. 8B. .

  When the rotary tool P is rotated and moved along the abutting portion TW, the metal of the abutting portion TW is plastically fluidized by frictional heat between the rotating tool P and the metal, and the abutting portion TW is solid-phase bonded. Although the friction stirring end position P1 'can be provided at an appropriate position on the tab plate 70, in this embodiment, the end position P1' is provided on an extension line of the abutting portion TW of the metal elements W1, W2. In this way, the friction stir route becomes straight and the moving distance of the rotary tool P can be minimized, so that the thermal processing process can be performed efficiently, and further, the wear of the rotary tool P is further reduced. The amount can be reduced.

  Although there is no restriction | limiting in particular in the form etc. of the rotation tool P, In this embodiment, what is shown to Fig.8 (a) (b) is used. The rotary tool P is made of a metal material harder than the object to be joined, such as tool steel, and has a stirring pin (probe) P1 protruding from the lower end of a cylindrical shoulder portion. The lower end surface of the shoulder portion is formed in, for example, a concave shape so as to prevent the metal from being plastically fluidized and scattered to the surroundings. Further, the stirring pin P1 is formed in a tapered truncated cone shape, for example. A stirring blade (not shown) engraved in a spiral shape is formed on the peripheral surface of the stirring pin P1.

  The rotational speed and moving speed (feeding speed) of the rotary tool P are set according to the size and shape of the stirring pin P1, the material and thickness of the metal elements W1, W2 and the like to be frictionally stirred, In many cases, the rotational speed is set within a range of 100 to 5000 (rpm), and the moving speed is set within a range of 20 to 2000 (mm / min). Further, the insertion speed (lowering speed) of the stirring pin P1 to the start position of friction stirring and the disengagement speed (upward speed) of the stirring pin P1 from the end position P1 ′ are also the dimensions and shape of the stirring pin P1, the metal elements W1, Although it is set according to the material such as W2 and the thickness, in many cases, it is set within the range of 30 to 60 (mm / min).

In the removal step, the joining jig body H is removed from the gantry K. Specifically, each nut 29 of each clamping means 20 is loosened to release the clamping by each clamp arm 22, and the nut 39 of the pressing means 30 is loosened to release the pressing by the pressing member 32, and each holding Each nut 49 of the means 40 is loosened to release the clamping by each clamp arm 42. Then, each nut 59 of each fixing means 50 is loosened to release the restraint by each clamp arm 52.
Then, from this state, the joining jig main body H may be slid in front of the gantry K, and the joining jig main body H may be removed from the side of the end of the abutting portion TW of the metal elements W1, W2.

  In the removal step, the tab plate 70 is removed from the end of the abutting portion TW by cutting, fusing, etc., the boundary portion (butting portion) between the end of the abutting portion TW of the metal elements W1, W2 and the tab plate 70, The metal elements W1, W2 are left behind.

  By passing through the above processes, the joined body of the metal elements W1, W2 without the friction stirring end position P1 'is formed. Needless to say, the obtained joined body may be cut, polished, drilled, painted, or the like.

According to the joining jig according to the first embodiment described above, the tab plate 70 is held in a state of being pressed against the end portion of the abutting portion TW by the pressing means 30, so that the end portion of the abutting portion TW is held. Installation and holding of the tab plate 70 at a predetermined position can be performed simply and reliably.
Moreover, since the end portions of the metal elements W1, W2 are tightened and held by the holding means 40 toward the abutting portion TW, the openings between the metal elements W1, W2 are preferably prevented. Therefore, it is possible to realize bonding by heat processing with high quality that hardly causes defects.

In addition, since the joining jig is provided with the clamping means 20 that clamps the tab plate 70 with the support portion 13, the tab plate 70 is pressed against the support portion 13 and suitably held. As a result, the displacement of the tab plate 70 on the support portion 13 and the like are suppressed, and high-quality thermal bonding using the tab plate 70 can be realized.
In particular, in thermal processing by frictional stirring, the tab plate 70 can be constrained to a predetermined position at the end portion of the abutting portion TW so as to be able to withstand strong pressing of the rotary tool P in combination with the action of the pressing means 30. It is possible to obtain a high-quality heat-bonded joint.

Further, the holding means 40 comes into contact with the partition portion W3 that partitions the hollow portions S1 and S2 of the metal elements W1 and W2 from the side to tighten the ends of the metal elements W1 and W2 toward the abutting portion TW. Therefore, the metal elements W1, W2 can be fastened to each other by using the partition part W3 of the metal elements W1, W2, and it is possible to suitably prevent the opening and misalignment at the end of the abutting part TW. Become.
Further, unlike the case where the holding means 40 is brought into contact with the outer surfaces of the metal elements W1, W2, and tightening is performed, there is no concern that the outer surfaces of the metal elements W1, W2 will be scratched. The finish will be beautiful.

  Further, since the fixing means 50 to the gantry K also has a restraining means for restraining the end portions of the metal elements W1 and W2 to the gantry K, the end portions of the metal elements W1 and W2 using the fixing means 50 are provided. The side can be restrained to the gantry K, and the vertical movement on the end side of the metal elements W1, W2 can be suitably prevented. In addition, since the fixing means 50 can restrain the metal elements W1 and W2 on the gantry K on the end portion side at the same time when the bonding jig body H is fixed to the gantry K, work efficiency is improved. The advantage is good.

  Further, since the fixing means 50 is provided on the gantry K side, the structure of the joining jig body H can be simplified and the weight can be reduced, and the joining jig body H can be attached to the gantry K. It becomes easier to perform work and removal work.

(Second Embodiment)
FIG. 9 shows a joining jig according to a second embodiment of the present invention, wherein (a) is a front view, (b) is a plan view, (c) is a side view, and FIG. 10 is a joining jig body. FIG. 11 is a perspective view showing a state of attachment to the gantry.

The difference between the joining jig of the present embodiment and the first embodiment is that the clamping means 80 ′ is directly provided on the mount K and fixed.
The metal elements W1 and W2 shown in the present embodiment are lower in height than those shown in the first embodiment, and correspondingly, a joining jig is also shown in the first embodiment. It is smaller than the one. Specifically, the joining jig main body H has a base 10 supported on a single column 1, and a support portion 13 for supporting the tab plate 70 is recessed on the upper surface 10 </ b> A of the base 10. ing. Further, a pressing means 30 is provided on the front surface 10B of the base portion 10, and holding means 40 are provided on the left and right side surfaces 10C and 10C of the base portion 10, respectively. Further, a fixing member 3 ′ is provided at the lower part of the front end of the column 1, and the other end 55 of the clamp arm 52 of the fixing means 50 is brought into contact with the fixing member 3 ′ so that the fixing member 3 ′ is mounted on the gantry K. It is supposed to be restrained. In the fixing means 50, one end portion 54 of the clamp arm 52 is inserted into the hollow portion S1 (see FIG. 11) of the metal elements W1 and W2 as in the first embodiment, and the metal elements W1 and W2 are inserted. The end portion is restrained to the gantry K and has a restraining function (restraining means).

  As shown in FIG. 10, the base portion 10 has a support portion 13 recessed in the center portion of the upper surface 10 </ b> A, and protruding portions 11 a formed one step higher than the support portion 13 on the left and right sides of the support portion 13. ', 11a' is provided. Further, a fulcrum portion 11c for supporting the other end portion 45 of the clamp arm 42 of the holding means 40 is provided on the front end side of the side surfaces 10C and 10C (only one side is shown in FIG. 10) of the base portion 10 so as to protrude vertically. Has been.

  The clamping means 80 'has the same basic configuration as the clamping device 80 described in the first embodiment, and is provided on the gantry K side. The clamping means 80 ′ is a clamp arm having a support shaft 81 screwed and fixed in a mounting hole K3 (see FIG. 9A) provided in the gantry K, and a long hole 83 ′ through which the support shaft 81 passes. 82 ′, a support 86 that supports the other end 85 ′ side of the clamp arm 82 ′, a washer 88, and a nut 89 that is fastened to the support shaft 81. The clamp arm 82 ′ is arranged such that one end 84 ′ is in contact with the upper surface of the tab plate 70 (see FIG. 11, the same applies hereinafter), and the other end 85 ′ is supported on the support 86. Be placed. The clamping means 80 ′ tightens the nut 89 so that the contact portion between the other end 85 ′ of the clamp arm 82 ′ and the support 86 serves as a fulcrum and the one end 84 ′ side is on the upper surface of the tab plate 70. It acts to be pressed. As a result, the tab plate 70 is clamped to the support portion 13 by the clamping means 80 '.

  According to such a joining tool according to the second embodiment, since the clamping means 80 ′ is provided on the gantry K side, the structure of the joining jig body H is simplified and the weight is reduced. This makes it easier to attach and remove the joining jig main body H to the gantry K.

  In addition, the holding means 40 in each of the above-described embodiments may be provided only on one side surface 10C of the base portion 10 so as to press and hold the metal element W1 or the metal element W2 toward the abutting portion TW.

DESCRIPTION OF SYMBOLS 1 Support | pillar 3 Fixing member 10 Base 10A Upper surface 13 Support part 20 Clamping means 22 Clamp arm 30 Pressing means 32 Pressing member 40 Holding means 42 Clamp arm 50 Fixing means 52 Clamp arm 70 Tab plate 80 Clamp device 80 'Clamping means 82 Clamp arm H Joining jig body K Mounting base P Rotating tool P1 Stirring pin S1 Hollow part TW Abutting part W1, W2 Metal element W3 Partition part

Claims (6)

It is a joining jig used when placing a tab plate at the end of the abutting part between metal elements and joining by thermal processing,
A support portion for supporting the tab plate;
Clamping means for clamping the tab plate between the support portion,
Furthermore, the joining jig | tool provided with the holding means which press-holds the edge part of the said metal element toward the said abutting part. The metal element includes a hollow portion that opens at an end of the metal element;
The joint according to claim 1, wherein the holding means includes a clamp arm inserted into the hollow portion, and the end portion of the metal element is pressed and held toward the abutting portion by the clamp arm. Jig. A fixing means to a gantry on which the metal element is mounted;
The joining jig according to claim 1 or 2, wherein the fixing means also has a restraining means for restraining the end side of the metal element to the frame.   The joining jig according to claim 3, wherein the fixing means is directly provided on the gantry.   The joining jig according to any one of claims 1 to 4, wherein the clamping means is directly provided on the gantry.   The joining jig according to claim 1, wherein the thermal processing is friction stirring.

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