JP3640553B2 - Welding workpiece shape correction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention avoids interference with the second welded part by deforming the first welded part prior to superimposing and welding the first welded part of the first work and the second welded part of the second work. The present invention relates to a shape correction apparatus for welding workpieces.
[0002]
[Prior art]
FIG. 9 shows a dashboard upper W ₁ (first workpiece) and a front component W ₂ (second workpiece) of the automobile. First welds P ₁ and P ₁ provided on the left and right sides of the dashboard upper W ₁ are shown. Are fitted to the welded parts P ₂ and P ₂ provided on the left and right sides of the front component W ₂ from above and overlapped, and the parts are fixed by spot welding.
[0003]
By the way, when the dashboard upper W ₁ gripped by the loader is lowered from above and the first welds P ₁ and P ₁ are fitted to the second welds P ₂ and P ₂ of the front component W ₂ , both weldings are performed. Since the parts P ₁ , P ₁ ; P ₂ , P ₂ are fitted so as to slide relative to each other, the edges of the first welds P ₁ , P ₁ are the edges of the second welds P ₂ , P ₂ . There is a case where it does not fit smoothly. In order to avoid this, when press-molding the dashboard upper W ₁ , the first welds P ₁ and P ₁ are slightly deformed in a direction away from the other second welds P ₂ and P _2. It is conceivable to prevent interference between the welds P ₁ and P ₁ ; P ₂ and P ₂ .
[0004]
[Problems to be solved by the invention]
However, there is a problem that a lot of cost is required to renovate the press die. If the first welds P ₁ and P ₁ are deformed manually without refurbishing the press die, extra time is required. And there are problems that require effort.
[0005]
The present invention has been made in view of the above-described circumstances, and an operation for deforming a welded portion in order to avoid interference occurring when the welded portions are overlapped is automatically performed without requiring a press die to be repaired. The purpose is to be able to.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the invention described in claim 1, the first welded portion of the first workpiece and the second welded portion of the second workpiece welded to the first welded portion are provided. In order to prevent the first welded portion from interfering with the second welded portion when the first and second welded portions are moved and overlapped in a sliding direction, the first welded portion is previously set in the second welded portion. A shape correction apparatus for a welded work that deforms in a direction away from a welded portion, a support base that supports the first work, and a first work supported by the support base that is lowered from above the support base. A loader that conveys to the position of the second workpiece, a shape correction means that is provided on the support base and deforms the first welded portion of the first workpiece, and the shape correction means that is provided on the loader and is lowered as the loader is lowered. Welding workpiece characterized by comprising an actuating member for actuating Shape correction device is proposed.
[0007]
According to the above configuration, when the loader is lowered so as to grip the first work supported by the support base, the operation member provided on the loader operates the shape correcting means provided on the support base. The first welded portion can be automatically deformed without requiring manual operation. As a result, when the first welded part of the first work gripped by the loader is fitted to the second welded part of the second work, the first welded part is prevented from interfering with the second welded part.
[0008]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the shape correcting means includes a lever pivoted on a support base at an intermediate portion, and a lower end provided at one end of the lever. The first welding is performed by the swing of the lever which is provided at the other end of the lever and is opposed to the first welding portion of the first workpiece and is pressed by the actuating member of the loader. There is proposed a weld work shape correction device including a pressing portion that presses and deforms a portion.
[0009]
According to the above configuration, when the loader descends to grip the first workpiece, the actuating member provided on the loader presses the pressed portion provided at one end of the lever pivotally supported by the support base, and the swinging lever Since the pressing part provided in the other end presses the first welding part of the first workpiece, the first welding part can be reliably deformed with a simple structure.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0011]
1 to 9 show an embodiment of the present invention. FIG. 1 is an overall front view of a loader, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 4 is an enlarged view of the main part of FIG. 1, FIG. 5 is a view in the direction of the arrow 5 in FIG. 4, FIG. 6 is a view in the direction of the arrow 6 in FIG. FIG. 9 is a perspective view of the dashboard upper and front components.
[0012]
As shown in FIG. 1, a first support member 1 supporting the dashboard upper W ₁ is a first workpiece of the present invention, the second support base 2 for supporting a front component W ₂ is a second workpiece of the present invention Are arranged on the floor surface, and a loader 3 is provided so as to connect the first support base 1 and the second support base 2. The loader 3 includes a beam 6 installed between a pair of support columns 4 and 5, guide rails 7 and 7 provided along the beam 6, a carriage 8 supported by the guide rails 7 and 7, and a carriage 8. A cylinder 9 for reciprocating travel and a work gripping part 11 supported by a lower part of the carriage 8 via a cylinder 10 so as to be movable up and down are provided, and the dashboard upper W ₁ on the first support base 1 is supported by the work gripping part 11. To the position of the front component W ₂ on the second support 2.
[0013]
Next, the structure of the workpiece gripping portion 11 of the loader 3 will be described with reference to FIGS.
[0014]
The workpiece gripping portion 11 includes a lifting base 21 that is lifted and lowered by the cylinder 10, and a pair of left and right first gripping means 22 and 22 for gripping one side edge of the dashboard upper W _{1 on} the lower surface of the lifting base 21; A pair of left and right second gripping means 23 and 23 for gripping the other side edge are provided.
[0015]
A support shaft 25 is fixed to the lower surface of the elevating base 21 via a pair of brackets 24, 24. A pair of collars 26, 26 are rotatably fitted to the outer periphery of the support shaft 25. A pair of swing plates 27, 27 fixed to the left and right collars 26, 26 are connected by a connecting rod 28 and can swing integrally around the support shaft 25. A bracket 29 fixed to the support shaft 25 and an arm 30 fixed to the connecting rod 28 are connected by a swing cylinder 31. When the swing cylinder 31 is driven to contract, the pair of swing plates 27 and 27 are supported by the support shaft. It swings around the 25 position from the gripping position indicated by the solid line to the retracted position indicated by the chain line.
[0016]
Each first gripping means 22 includes a fixed gripping claw 32 fixed to the lower end of the swinging plate 27 and a movable gripping claw 33 pivotally supported by a pin 34 at the lower end of the swinging plate 27. When the first gripping cylinder 35 provided between the plate 27 and the movable gripping claw 33 is driven to contract, the movable gripping claw 33 swings away from the fixed gripping claw 32 to grip the dashboard upper W ₁ . Canceled.
[0017]
Second gripping means 23 and 23 are provided at the lower ends of a pair of brackets 36 and 36 that hang from the lower surface of the elevating base 21, respectively. Each second gripping means 23 includes a fixed gripping claw 37 fixed to the lower end of the bracket 36 and a movable gripping claw 39 pivotally supported by a pin 38 at the lower end of the bracket 36. When the second gripping cylinder 40 provided between the first gripping member 39 and the second gripping cylinder 40 is driven to contract, the movable gripping claw 39 swings away from the fixed gripping claw 37 and the gripping of the dashboard upper W ₁ is released.
[0018]
Two actuating members 41, 41 for actuating shape correcting means 59, 59 to be described later hang down from the lower surface of the elevating base 21.
[0019]
Next, the structure of the 1st support stand 1 is demonstrated based on FIGS.
[0020]
The first support base 1 includes a rectangular support frame 52 provided at the upper ends of two support columns 51, 51 erected on the floor surface. Two positioning pins are provided on the left and right upper surfaces of the support frame 52. 53, 53; 54, 54 are erected, and two receiving seats 55, 55 are provided on the upper surface of the central portion. The positioning pins 53, 53; 54, 54 are fitted into holes formed in the dashboard upper W ₁ from below to position the dashboard upper W ₁ . It seats 55, 55 for supporting the dashboard upper W ₁ in contact with the lower surface of the dashboard upper W _1. Limit switch 57 having a detection arm 56 is provided via a bracket 58 on one lateral side of the support frame 52, the support frame 52 and the detection arm 56 for supporting the dashboard upper W ₁ is pressed against the limit switch 57 ON, and to detect the presence of the dashboard upper W _1.
[0021]
Shape correction means 59 and 59 are provided at both left and right ends of the support frame 52, respectively. Each shape correction means 59 includes an L-shaped lever 62 pivotally supported at the upper end of the bracket 60 via a support shaft 61, a pressed portion 63 provided at one end of the lever 62, and the lever 62. The other end portion of the lever 62 and a spring 65 that connects the other end portion of the lever 62 and the bracket 60, and the pressed portion 63 is urged upward by the elastic force of the spring 65. Is done. In a state where the dashboard upper W ₁ is supported by the support frame 52, the pressed portion 63 of the lever 62 protrudes outside the dashboard upper W ₁ and is positioned below the operating member 41 of the loader 3. . Further, the pressing portion 64 of the lever 62 faces the first pressing portion P ₁ hanging from the dashboard upper W ₁ from the side.
[0022]
Next, the operation of the embodiment of the present invention having the above-described configuration will be described.
[0023]
With the dashboard upper W ₁ and the front component W ₂ supported on the first support base 1 and the second support base 2, respectively, the cylinder 10 of the loader 3 stopped above the first support base 1 is driven to extend to work. The holding part 11 is lowered. When the work gripping portion 11 is lowered toward the first support 1, as shown by a chain line in FIG. 3, the swing cylinder 31 is in a contracted state and the first gripping means 22, 22 together with the swing plates 27, 27. Dashboard is swung so away from the upper W _1, and the first gripping cylinder 35 and 35 movable gripping claws 33, 33 are stationary gripping claws of the first gripping means 22 and 22 in the contracted state 32, 32 so that they are separated from each other. The second gripping cylinders 40, 40 are in a contracted state, and the movable gripping claws 39, 39 of the second gripping means 23, 23 are opened so as to be separated from the fixed gripping claws 37, 37.
[0024]
When the operating members 41 and 41 press the pressed parts 63 and 63 of the shape correcting means 59 and 59 from above as the work gripping part 11 is lowered, the levers 62 and 62 are resisted against the resilient force of the springs 65 and 65. Oscillates, and as indicated by an arrow A in FIG. 7, the pressing portions 64, 64 press the first welding portions P ₁ , P ₁ of the dashboard upper W ₁ . As a result, the two first welds P ₁ and P ₁ are plastically deformed in directions approaching each other.
[0025]
When the work gripping portion 11 reaches the lower limit and stops, the swing cylinder 31 is driven to extend and swings so that the first gripping means 22, 22 approaches the dashboard upper W ₁ , and then the first gripping is performed. The cylinder 35 is driven to extend, and the movable gripping claws 33 and 33 swing to grip the dashboard upper W ₁ between the fixed gripping claws 32 and 32. At the same time, the second gripping cylinder 40 of the second gripping means 23, 23 is driven to extend and the movable gripping claws 39, 39 swing, and the dashboard upper W ₁ is placed between the fixed gripping claws 37, 37. Hold it.
[0026]
When the workpiece gripping portion 11 that grips the dashboard upper W ₁ rises, the carriage 8 travels along the beam 6 in the cylinder 9, stops at a position above the second support base 2, and lowers the workpiece gripping portion 11. Dashboard upper W ₁ gripped by the workpiece holding unit 11 is accessible from above to the front component W ₂ which is supported by the second supporting table 2, the first welding portion P ₁ of the dashboard upper W _1, P ₁ is a front the second welding part P ₂ of the component W _2, fitted to P _2. At this time, as shown in FIG. 8A, the first welds P ₁ and P ₁ of the dashboard upper W ₁ are moved to the second welds P ₂ and P ₂ of the front component W ₂ by the shape correcting means 59 and 59, respectively. _Since they are deformed so as to be separated from ₂ , the welded portions P ₁ , P ₁ ; P ₂ , P ₂ fit smoothly without interference as shown in FIG.
[0027]
Subsequently, as shown in FIG. 8C, the overlapped welds P ₁ , P ₁ ; P ₂ , P ₂ are held by welding tips 66, 66 of a welding gun provided on a robot arm (not shown). Thus, the deformed first welds P ₁ and P ₁ of the dashboard upper W ₁ are restored and brought into close contact with the second welds P ₂ and P ₂ of the front component W ₂ . Thus, as shown in FIG. 8 (D), spot welding is performed on both welds P ₁ , P ₁ ; P ₂ , P ₂ with the welding tips 66, 66.
[0028]
Thus, when the workpiece holding portion 11 of the loader 3 is lowered so as to grip the dashboard upper W _1, the first welding portion P ₁ of the dashboard upper W ₁ shape correction means 59, 59 will automatically operate Since P ₁ is deformed, the first welds P ₁ and P ₁ are deformed to be the second welds P ₂ and P ₂ of the front component W ₂ without modifying the press mold of the dashboard upper W _1. It can be fitted smoothly. In addition, since the shape correcting means 59 and 59 have a very simple structure, an increase in cost caused by adding them can be minimized.
[0029]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0030]
For example, in the embodiment, the dashboard upper W ₁ is illustrated as the first work, and the front component W ₂ is illustrated as the second work. However, the present invention can be applied to any other work of the present invention.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the loader is lowered to grip the first work supported by the support base, the shape correcting means provided on the support base by the operating member provided on the loader. By operating, the first welded portion of the first workpiece can be automatically deformed without requiring manual labor. As a result, when the first welded part of the first work gripped by the loader is fitted to the second welded part of the second work, the first welded part is prevented from interfering with the second welded part.
[0032]
According to the second aspect of the present invention, when the loader descends to grip the first workpiece, the actuating member provided on the loader presses the pressed portion provided at one end of the lever pivotally supported on the support base. And since the press part provided in the other end part of the rocking | fluctuating lever presses the 1st welding part of a 1st workpiece | work, the said 1st welding part can be reliably deformed with a simple structure.
[Brief description of the drawings]
1 is an overall front view of a loader. FIG. 2 is an enlarged view of the main part of FIG. 1. FIG. 3 is a view taken in the direction of the arrow 3 in FIG. FIG. 6 is a perspective view of the main part of the first support base. FIG. 8 is an explanatory diagram of the operation. FIG. 9 is a perspective view of the dashboard upper and front components. Figure [Explanation of symbols]
1 First support stand (support stand)
3 Loader 41 Actuating member 59 Shape correction means 62 Lever 63 Pressed portion 64 Pressed portion P ₁ First welded portion P ₂ Second welded portion W ₁ Dashboard upper (first workpiece)
W ₂ front component (second workpiece)

Claims (2)

A first weld (P ₁ ) of the first work (W ₁ ) and a second weld (P ₂ ) of the second work (W ₂ ) welded to the first weld (P ₁ ), When the first and second welds (P ₁ , P ₂ ) are moved and overlapped with each other, the first weld (P ₁ ) interferes with the second weld (P ₂ ). In order to prevent the welding work from being performed, a weld work shape correction device that deforms the first welded portion (P ₁ ) in a direction away from the second welded portion (P ₂ ) in advance,
A support base (1) for supporting the first workpiece (W ₁ );
A loader (3) that descends from above the support base (1), grips the first work (W ₁ ) supported on the support base (1), and conveys it to the position of the second work (W ₂ );
Shape correction means (59) provided on the support base (1) for deforming the first welded portion (P ₁ ) of the first workpiece (W ₁ );
An actuating member (41) provided on the loader (3) to actuate the shape correcting means (59) as the loader (3) descends;
An apparatus for correcting the shape of a welding workpiece, comprising: The shape correcting means (59)
A lever (62) pivotally supported by the support base (1) in the middle;
A pressed part (63) which is provided at one end of the lever (62) and is pressed by the operating member (41) of the loader (3) which descends;
First welding portion of the lever first workpiece provided at the other end of (62) (W ₁₎ facing the (P _1), the oscillation of the lever is pressed to the pressed portion (63) (62) A pressing portion (64) for pressing and deforming the first welded portion (P ₁ );
The shape correction device for a welded workpiece according to claim 1, comprising:

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