KR101666964B1

KR101666964B1 - jig for FSW or FSJ

Info

Publication number: KR101666964B1
Application number: KR1020150059895A
Authority: KR
Inventors: 김문기
Original assignee: (주)세원물산
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2016-10-17

Abstract

The present invention relates to a new structural jig for friction stir welding with an ejector which is suitable for mutual friction stir welding of members of different materials. The jig for friction stir welding with an ejector in accordance with the present invention, comprises: a supporting panel (10); and a support (20) formed in a block shape extended in a vertical direction, and fixated to the supporting panel (10) wherein a cross-shaped fixing groove (21) into which first and second members (1, 2) are inserted is formed on an upper surface. Accordingly, friction stir welding is performed in a state which the first and second members (1, 2) are fixated to the fixing groove (21), thereby effectively preventing torsion of the first and second members (1, 2) during friction stir welding. In particular, the ejector (40) is arranged on a circumferential surface of the support (20) such that it pushes the first and second members (1, 2) mutually coupled by welding in a state being fixated to the fixing groove (21) to detach the members; thereby easily separating the first and second members (1, 2) the finished a first friction stir welding from the fixing groove (21).

Description

A jig for friction stir welding equipped with an ejector (jig for FSW or FSJ)

The present invention relates to a jig for friction stir welding equipped with an ejector of a new structure suitable for friction stir welding of members made of different materials.

Generally, as a method of welding and fixing members used as parts of a vehicle, a heat welding method in which members are mutually melted and welded by using heat is mainly used.

However, such a heat welding method causes problems such as residual stress and thermal deformation during welding by welding members using high temperature heat.

Therefore, in recent years, a friction stir welding method (FSW, FSJ) has been developed and widely used in which two members can be welded to each other without using heat at a high temperature.

In this friction stir welding method, after two members to be welded to each other are mutually abutted or laminated, a separate tool is brought into close contact with the mutually abutted or laminated portion at a high pressure, and then the tool is rotated at a high speed, So that they are welded and fixed.

Such a friction stir welding method is described in detail in a number of prior documents including Patent Registration No. 10-0725217 and No. 10-0815654, and a detailed description thereof will be omitted.

On the other hand, according to the friction stir welding method, since it is possible to effectively weld a member, such as aluminum and iron, which are difficult to weld each other by a conventional method, researches that apply such a friction stir welding method It is progressing.

For example, as shown in Fig. 1, a frame of a vehicle generally has first and second members (1, 2) arranged so as to be mutually intersected to form a structure having high strength.

At this time, the first and second members 1 and 2 are formed by press-working a metal plate to form bottom plates 1a and 2a and side plates 1b and 1b extending upward from both sides of the bottom plates 1a and 2a, 2b and an extension 1c or 2c extending laterally from the upper end of the side plate 1b or 2b and the side plate 1b of the first member 1 is provided with a first member 1 Is formed in the concave portion 1d.

Therefore, when the second member 2 is inserted into the concave portion 1d of the first member 1, the extending portions 1c and 2c of the first and second members 1 and 2 are in close contact with each other And the first and second members 1 and 2 can be welded to each other by friction stir welding the portions where the extended portions 1c and 2c are in close contact with each other.

However, in order to weld the extensions 1c and 2c to each other using the friction stir welding method, the tool must be brought into close contact with the upper surfaces of the extensions 1c and 2c which are in close contact with each other at a high pressure, The first and second members 1 and 2 are formed by press-working a metal plate. In addition to the extension portions 1c and 2c, the entire first and second members 1 and 2 may be twisted Lt; / RTI >

This problem is not limited to the above-described automobile parts, but is always generated when friction stir welding is performed after two members made of a thin metal plate are arranged so as to cross each other.

Therefore, there is a need for a new method to solve such a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a jig for friction stir welding equipped with an ejector of a new structure capable of firmly fixing a panel-shaped member having a small thickness and a long length.

According to an aspect of the present invention, there is provided a friction stir welding jig having an ejector for supporting a first member and a second member, A fixing groove 21 in the form of a cross extending in the vertical direction and fixed to the supporting panel 10 and having a cross shape in which the first and second members 1 and 2 are inserted, The first and second members (1, 2) provided at the periphery of the support base (20) and welded to each other in a state of being coupled to the fixing groove (21) There is provided a jig for friction stir welding equipped with an ejector characterized by including an ejector (40).

According to another aspect of the present invention, the ejector 40 includes a cylinder mechanism 41 having a piston rod 41a facing upward on one side of the supporter 20, A lift block 42 which is concavely formed on the upper surface of the piston rod 41a and to which the insertion portion 42a of the lift block 42 is inserted, An elastic member 44 connected to the elevating block 42 to press the elevating block 42 downward; and an elastic member 44 provided on the elevating block 42, Up detecting means 45 for detecting that the elevating block 42 is pulled upward in a state where the elevating block 41a is stopped and a controller for detecting an operation of the electromagnet 43 by detecting a signal of the rising detecting means 45, And a control unit (46) for controlling the friction stir welding.

According to another aspect of the present invention, a plurality of first and second members (1,2), which are provided on the support panel (10) and fixedly inserted into the fixing groove (21) of the support base (20) The clamping device according to any one of claims 1 to 3, further comprising a clamp (30), wherein the first and second members (1,2) are coupled to the fixing groove (21) And the first and second members (1,2) are friction stir welded to each other by rotating the tool while being pressed by the friction stir welding tool.

According to another aspect of the present invention, the support base 20 includes a fixing part 23 fixedly coupled to the upper surface of the support panel 10 and having a support rod 23a extending upward at the center of the upper surface, The support bar 23a has an engaging hole 24a which is coupled to the support bar 23a so as to be able to ascend and descend in a concave shape. Wherein when the excessive load is applied to the elevating portion 24, the elevating portion 24 is lowered while the shearing piece 24b is sheared. A jig for friction stir welding is provided.

A jig for friction stir welding equipped with an ejector according to the present invention comprises a support panel 10, a block extending in a vertical direction and fixed to the support panel 10, Wherein the first and second members (1, 2) are fixed to the fixing groove (21), and a support base (20) on which a cross - shaped fixing groove (21) By the stirring welding, it is possible to effectively prevent the first and second members 1 and 2 from being twisted during the friction stir welding operation.

Particularly, an ejector 40 is provided on a circumferential surface of the supporter 20, and the first and second members 1 and 2 welded to each other in a state of being coupled to the fixing groove 21 are pushed upward, It is very easy to separate the first and second members 1 and 2 from the fixing groove 21 by performing the first friction stir welding.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a reference drawing showing the shapes of first and second members generally used;
2 is a plan view showing a jig for friction stir welding equipped with an ejector according to the present invention,
3 is a plan view showing a state where the first and second members are coupled to a jig for friction stir welding equipped with an ejector according to the present invention,
FIG. 4 is a perspective view showing a support and a first and a second members of a jig for friction stir welding equipped with an ejector according to the present invention,
5 to 7 are views showing a clamp of a friction stir welding jig provided with an ejector according to the present invention.
8 to 10 are side cross-sectional views illustrating an ejector of a friction stir welding jig provided with an ejector according to the present invention,
11 is a circuit diagram showing an ejector of a friction stir welding jig equipped with an ejector according to the present invention.
12 to 15 are views for explaining the action of the ejector of the friction stir welding jig provided with the ejector according to the present invention,
16 is a side sectional view showing a second embodiment of a friction stir welding jig provided with an ejector according to the present invention,
17 and 18 are reference views for explaining the operation of the second embodiment of the friction stir welding jig provided with the ejector according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 2 to 15 illustrate a friction stir welding jig equipped with an ejector according to the present invention, in which the first and second members (1,2) .

The first and second members 1 and 2 are formed by press-working a metal plate and are respectively provided with bottom plates 1a and 2a and side plates 1b and 2b extending upward from both sides of the bottom plates 1a and 2a And an extension 1c and 2c extending laterally from the upper end of the side plates 1b and 2b. The side plate 1b of the first member 1 is provided with the second member 2, The concave portion 1d is formed.

At this time, the first member 1 is made of a steel material, which is a general magnetic material, and the second member 2 is made of an aluminum material.

According to the present invention, the jig for friction stir welding equipped with the ejector comprises a support panel (10) and a block extending in the vertical direction, the first and second members (1, 2) Shaped fixing grooves 21 into which the first and second members 21 and 22 are inserted and which are provided in the support panel 10 and inserted and fixed in the fixing grooves 21 of the support frame 20 A plurality of first and second members 1 and 2 which are welded to each other in a state of being coupled to the fixing groove 21 in a circumferential portion of the support base 20, , 2) of the ejector (40).

In detail, the support panel 10 is made of a metal material having high strength.

As shown in FIG. 4, the support base 20 is formed in the form of a rectangular bar extending in the vertical direction, and the fixing groove 21 is formed in the upper surface of the support base 20, (22).

The fixing groove 21 is formed such that when the first member 1 is coupled to the fixing groove 21, the lower surface of the first member 1 is held in close contact with the bottom surface of the fixing groove 21 .

5 to 7, the clamp 30 includes a first or second member (not shown) extending upward from the support panel 10 and inserted into the fixing groove 21 of the support frame 20, A support member 31 for supporting a lower side of the extension portions 1c and 2c of the support base 20 and a fixing groove 21 of the support base 20 in such a manner as to be vertically coupled to the support member 31, A pressing bar 32 for pressing the upper surface of the extension 1c or 2c of the first or second member 1 or 2 inserted into the support member 31, And an actuator 34 connected to the rear end of the pressure bar 32 so that the pressure bar 32 is rotated in the vertical direction.

The actuator 34 uses a general hydraulic cylinder.

6, after the first or second member 1 or 2 is inserted into the fixing groove 21, the actuator 34 is driven as shown in FIG. 7, The pressing bar 32 presses the extension portions 1c and 2c of the first or second member 1 and 2 against the upper surface of the support member 31 to rotate the bar 32, Or the second support member 31 is fixed so as not to move.

At this time, the clamp 30 is composed of a plurality of clamps, and the first and second members 1 and 2 are inserted into and fixed to the fixing grooves 21 of the support base 20, The clamp 30 is operated to fix the first and second members 1 and 2 so as not to move.

8 to 11, the ejector 40 includes a cylinder mechanism 41 having a piston rod 41a facing upward on one side of the support base 20, The elevator block 42 is formed with an insertion portion 42a which is recessed in the upper surface thereof and is vertically coupled to the upper end of the piston rod 41a. An elastic member 44 connected to the elevating block 42 to press the elevating block 42 downward and an electromagnet 43 provided to the piston rod 41a or the elevating block 42 A rising sensor 45 for detecting that the lifting block 42 is pulled up while the piston rod 41a is stopped; And a control unit 46 for controlling the operation of the vehicle.

The cylinder mechanism 41 uses a general hydraulic cylinder and is fixed to a bracket 25 provided on a circumferential surface of the support base 20 so as to raise and lower the lift block 42 according to elongation and contraction.

The elevating block 42 is provided on both sides of the circumferential surface of the support 20 on which both ends of the first member 1 are projected so that the first member 1 And a support pipe 42b, which is vertically coupled to the upper end of the piston rod 41a of the cylinder mechanism 41, extends downward.

The support pipe 42b has an inner diameter corresponding to the outer diameter of the piston rod 41a and is vertically coupled to the upper end of the piston rod 41a. The upper end of the piston rod 41a, When the elevating block 42 is lifted up, the engaging protrusions 41b and 42c are engaged with each other, so that the support pipe 42b is rotated in the vertical direction And is not separated from the upper end of the piston rod 41a.

At this time, the insertion portion 42a of the lifting block 42 is configured to be slightly larger than the circumferential portion of the first member 1.

The cylinder mechanism 41 descends the elevating block 42 so that the bottom surface of the inserting portion 42a maintains the same height as the bottom surface of the fixing groove 21 of the supporting table 20, The elevating block 42 is elevated so that the bottom surface of the inserting portion 42a is positioned above the upper end of the supporting table 20. [

The electromagnet 43 is embedded in the bottom surface of the inserting portion 42a.

12, when the first member 1 is inserted into the fixing groove 21 of the support base 20 after the elevating block 42 is lowered by the cylinder mechanism 41, The bottom surface of the first member 1 protruding from both sides of the fixing groove 21 is in close contact with the electromagnet 43.

9, the elastic member 44 is coupled to the upper end of the piston rod 41a so as to be positioned between the engagement protrusions 41b and 42c, .

The lift detecting means 45 uses a limit switch provided on the lower side of the elevating block 42 so as to be located inside the support pipe 42b so that the push button 45a extends downward, The push button 45a is pushed down when the piston rod 41 is lowered and the push button 45a is protruded downward when the piston rod 41a is stopped and the lift block 42 is pulled upward Off.

The control unit 46 receives the signal of the rising sensor 45 and turns on the electromagnet 43 when the ascending block 42 is lowered and the rising sensor 45 is turned on, And the electromagnet 43 is turned off when the block 42 is pulled upward and the rising detecting means 45 is turned off.

A method of performing friction stir welding between the first and second members 1 and 2 using a jig for friction stir welding equipped with the ejector having the above-described structure will now be described.

9, in a state in which the elevating block 42 is lowered by the cylinder mechanism 41 as shown in Fig. 8, the elevating block 42 is moved by the elastic member 44 The push button 45a of the rising detection means 45 is kept pressed by the elevation block 42 and the control unit 46 stops the push button 45a, Detects the signal of the rising-up means (45) and turns on the electromagnet (43).

12, when the worker inserts the first and second members 1 and 2 into the fixing groove 21, both ends of the first member 1 are inserted into the elevating block 42, And is fixedly attached to the electromagnet 43. As shown in Fig.

Then, the tool is brought into close contact with the overlapping portion of the first and second members (1, 2) while the clamp (30) is operated to fix the first and second members (1, The first and second members 1 and 2 can be friction stir welded with each other by rotating the tool in a pressurized state.

When the first and second members 1 and 2 are friction stir welded together, the fixing of the clamp 30 is released. After the fixing of the clamp 30 is released, as shown in FIG. 13 The lifting block 42 is lifted by the cylinder mechanism 41 of the ejector 40 so that the first member 1 is pushed upward so that the first and second members 1, So as to be separated from the groove 21.

At this time, since the electromagnet 43 maintains the on state, the first member 1 is fixed to the inserting portion 42a of the elevating block 42 by the electromagnet 43.

14, in order to separate the first and second members 1 and 2 fixed to the elevation block 42 from the elevation block 42, the first and second members 1 and 2 The lifting block 42 is pulled upward with the first member 1 so that the rising detecting means 45 is turned off.

When the rising sensor 45 is turned off, the control unit 46 turns off the electromagnet 43 to release the fixing of the first member 1. As a result, as shown in Fig. 15, The first and second members 1 and 2 fixed to the elevating block 42 can be separated from the elevating block 42.

When the first and second members 1 and 2 are separated from the elevating block 42, the upward pulling force of the elevating block 42 disappears, The rising member 45 is lowered again by the elastic member 44, and the electromagnet 43 is turned on.

After the elevating block 42 is lowered to the original position by the cylinder mechanism 41, the above-described process is repeated to repeat the operation of friction stir welding the first and second members 1, can do.

The jig for friction stir welding equipped with the above-described ejector has a support panel 10, a block extending in the vertical direction and fixed to the support panel 10, and the upper and lower surfaces of the first and second members 1 Shaped fixing groove 21 into which the first and second members 1 and 2 are inserted so that the first and second members 1 and 2 are fixed to the fixing groove 21, By welding, it is possible to effectively prevent the first and second members 1 and 2 from being twisted during the friction stir welding operation.

The ejector 40 includes a cylinder mechanism 41 having a piston rod 41a facing upward on one side of the support base 20 and a cylinder mechanism 41 having the first or second member 1, A lift block 42 which is recessed on the upper surface of the insert block 42a and is vertically coupled to the upper end of the piston rod 41a and a lift block 42 which is provided on the bottom surface of the insert block 42a of the lift block 42 An elastic member 44 connected to the elevating block 42 to press the elevating block 42 downward and a resilient member 44 provided on the elevating block 42 to stop the piston rod 41a And a control unit 46 for controlling the operation of the electromagnet 43 by detecting a signal of the rising sensor 45. The control unit 46 controls the operation of the electromagnet 43, ).

12, the first and second members 1 and 2 coupled to the fixing groove 21 are moved up and down by the electromagnet 43 in a state in which the elevation block 42 is lowered By maintaining the state fixed to the block 42, not only the first and second members 1 and 2 can be more firmly fixed to the fixing groove 21, but also, as shown in Fig. 13, It is possible to effectively prevent the first and second members 1 and 2 from being detached from the insertion portion 42a of the elevation block 42 due to vibration or impact generated when the elevation block 42 is moved up and down There are advantages to be able to.

Particularly, in order to completely lift the lift block 42 and allow the operator to separate the first and second members 1 and 2 from the insertion portion 42a, as shown in FIG. 14, When the members 1 and 2 are pulled upward the control unit 46 senses the signal of the rising detection means 45 to turn off the electromagnet 43 so that the operator separately turns the electromagnet 43 on and off There is an advantage that it is more convenient to use.

The support panel 10 is provided with a plurality of clamps 30 for fixing the first and second members 1 and 2 inserted and fixed to the fixing grooves 21 of the support frame 20, After the first and second members 1 and 2 are coupled to the fixing groove 21, the tool is rotated in a state in which the tool is in close contact with the overlapping portion of the first and second members 1 and 2 The first and second members 1 and 2 can be welded to each other by friction stir welding.

Therefore, there is an advantage that the first and second members 1 and 2 coupled to the fixing groove 21 can be more firmly fixed.

16 to 18 illustrate another embodiment according to the present invention. The support base 20 is fixedly coupled to the upper surface of the support panel 10, and a support rod 23a extending upward is formed at the center of the upper surface And an elevating portion 24 having an engaging hole 24a which is movably coupled to the supporting bar 23a and which is recessed on the lower side.

At this time, the elevating portion 24 has the fixing groove 21 formed on the upper surface thereof, and a front piece 24b that is hooked on the upper surface of the supporting bar 23a is provided inside the coupling hole 24a.

The front piece 24b protrudes inward from the inner circumferential surface of the coupling hole 24a. When the first and second members 1 and 2 coupled to the fixing groove 21 are friction stir welded When an excessively large load is applied as compared with a general load applied to the elevating portion 24, the elevating portion 24 is sheared as shown in FIG. 18 so that the entire elevating portion 24 descends downward.

The jig for friction stir welding equipped with the ejector having the above structure rotates the tool 3 in a state in which the tool 3 is pressed against the first and second members 1 and 2 coupled to the fixing groove 21 to perform friction stir welding When the abnormal load is excessively applied to the elevating portion 24, the entire shearing portion 24b is sheared and the entire elevating portion 24 descends downward, so that the tool 3 or the jig is damaged There is an advantage that it can be prevented.

That is, in order to perform the friction stir welding of the first and second members 1 and 2 by using such a jig, as shown in FIG. 17, the fixing groove 21 of the support base 20 is provided with first and second members The tool 3 is brought into close contact with the portions where the first and second members 1 and 2 are in close contact with each other and the tool 3 is rotated with a very strong force, The first and second members 1 and 2 should be mixed with each other.

In order for the first and second members 1 and 2 to be effectively friction stir welded, the first and second members 1 and 2 should be plastically deformed by an appropriate force.

When the first or second member 1 or 2 is mixed with impurities or the first or second member 1 or 2 is not appropriately ducted for various reasons, The first and second members 1 and 2 are not properly deformed when the first and second members 1 and 2 are pressed so that an excessive load is applied to the support base 20 and the tool 3 The support base 20 or the tool 3 may be damaged.

However, in the present embodiment, when an excessive load is applied to the elevating portion 24, as shown in FIG. 18, the forward portion 24b is sheared and the elevating portion 24 sits down, The gap between the elevating portion 24 and the tool 3 is spaced apart from each other and an excessive load can be prevented from being applied to the support base 20 and the tool 3. [

The front piece 24b is formed to protrude inward from the inner circumferential surface of the engaging hole 24a. However, the front piece 24b may be formed separately from the elevating portion 24, The front piece 24b may be replaced by only the front piece 24b when the front piece 24b is sheared.

10. Support panel 20. Support
30. Clamp 40. Ejector

Claims

A support panel (10);
(20) fixed to the support panel (10) and having a cross-shaped fixing groove (21) in which the first and second members (1,2) arranged to cross each other and friction stir welding are inserted; And
An ejector (40) provided at a periphery of the support base (20) and pushing the first and second members (1,2) welded to each other while being engaged with the fixing groove (21) by friction stir welding; , &Lt; / RTI &
The support base 20 is fixed to the upper surface of the support panel 10 and has a fixing part 23 having a support rod 23a extending upward at the center of the upper surface thereof, The fixing hole 21 is formed on the upper surface of the elevating part 24 and the fixing hole 21 is formed in the fixing hole 24a on the inner side And a front piece 24b protruding from the upper surface of the supporting bar 23a and hooked on the upper surface of the supporting bar 23a,
The ejector 40 includes a cylinder mechanism 41 having a piston rod 41a facing upward on one side of the elevation portion 24 and a piston rod 41a coupled to the upper end of the piston rod 41a to be movable up and down, (42) having an insert portion (42a) into which one of the first member (1) and the second member (1, 2) is inserted is recessed on the upper surface, An electromagnet 43 for attaching the first or second member 1 or 2 to be inserted into the first member 42a and an elastic member 42 connected to the elevating block 42 to press the elevating block 42 downward A lift sensor 45 provided in the lift block 42 for detecting that the lift block 42 is pulled upward while the piston rod 41a is stopped, (46) for sensing the signal of the electromagnet (45) and controlling the operation of the electromagnet (43)
Wherein the jig is provided with an ejector.

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