JP7201096B2 - Peening treatment device, peening treatment method, and structure manufacturing method - Google Patents

Description

The present invention relates to a peening treatment apparatus, a peening treatment method, and a structure manufacturing method.

Welded joints are used in a variety of structures. In such a welded structure, since the fatigue strength of the welded portion is lowered by the influence of welding, countermeasures are often taken to reduce the fatigue strength of the welded portion. For example, in a wind turbine tower manufactured by girth-welding a plurality of large-diameter steel pipes, a bending load is repeatedly applied to the welded portion by the wind load. Therefore, in welded structures such as towers for wind power generation and foundations, it is necessary to take measures against fatigue to suppress the occurrence of fatigue cracks in welded portions.

Conventionally, as a countermeasure against fatigue of welds, a technique of introducing compressive residual stress into weld bead toes by peening has been used. For example, Patent Document 1 discloses a peening carriage for performing peening treatment on the surface of a base metal material near the toe of a weld bead in a welded joint formed by welding a rib plate to a base material. there is

In the peening carriage disclosed in Patent Document 1, the peening treatment can be performed by the chipping hammer while the peening carriage is clamped to the rib plate by the clamp roller and the peening carriage is run.

Japanese Patent No. 5418867

When the peening truck disclosed in Patent Document 1 is used, the peening treatment can be performed while the peening truck is self-propelled as described above.

However, when using the peening carriage disclosed in Patent Document 1, it is necessary to clamp the peening carriage to the rib plate by the clamp rollers. For this reason, peening can be applied to welded joints formed by welding a rib plate to a base material, but, for example, welding where a rib plate is not provided, such as a circumferential weld between metal pipes, can be performed. The peening process cannot be performed on the part.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a peening apparatus, a peening method, and a structure manufacturing method that can efficiently perform peening on welds of various shapes.

The gist of the present invention is the following peening treatment apparatus, peening treatment method, and structure manufacturing method.

(1) An apparatus for performing peening treatment on a structure, comprising: a support section;
a first peening device and a second peening device arranged oppositely in a first direction;
a floating coupling portion coupling the first peening device and the second peening device to the support portion so that the first peening device and the second peening device can reciprocate relative to the support portion in the first direction; When,
a force directed toward the second peening device in the first direction, and a force directed toward the first peening device in the first direction; and a biasing portion for
A peening processor.

(2) The floating connecting portion is
The first peening device and the second peening device are mounted on the supporting portion so that the first peening device and the second peening device can reciprocate relative to the supporting portion in a second direction perpendicular to the first direction. concatenate to
The peening apparatus according to (1) above.

(3) The peening processing device according to (2) above, wherein the biasing section further applies a force toward one side in the second direction to the first peening device and the second peening device.

(4) The floating connecting portion is
a first connecting device that connects the first peening device and the support so that the first peening device can reciprocate with respect to the support in the first direction and the second direction;
a second connecting device that connects the second peening device and the support so that the second peening device can reciprocate with respect to the support in the first direction and the second direction;
The urging portion is
a first elastic member that receives a force directed toward the one side in the first direction from the first peening device and applies a reaction force directed toward the other side in the first direction to the first peening device;
a second elastic member that receives a force directed toward the other side in the first direction from the second peening device and applies a reaction force directed toward the one side in the first direction to the second peening device; The peening apparatus according to (2) or (3) above.

(5) The urging portion further
a third elastic member that receives a force directed toward the other side in the second direction from the first peening device and applies a reaction force directed toward the one side in the second direction to the first peening device;
a fourth elastic member that receives a force directed toward the other side in the second direction from the second peening device and applies a reaction force directed toward the one side in the second direction to the second peening device; The peening apparatus according to (3) or (4) above.

(6) the structure is a structure comprising at least two metal members joined together by a weld extending in a predetermined direction;
the first direction is the width direction of the welded portion;
The first peening device,
supported by the support portion so that peening can be performed on the toe portion on one side in the width direction of the welded portion;
The second peening device is
It is supported by the support part so that peening treatment can be performed on the toe part on the other side in the width direction of the weld part,
The peening apparatus according to any one of (1) to (5) above.

(7) The floating connection portion restricts the first peening device and the second peening device from moving in the predetermined direction with respect to the support portion. The peening apparatus according to (6) above, wherein the apparatus is connected to the support.

(8) The above (6), wherein the support portion moves relative to the structure in the predetermined direction while movement of the welded portion in the width direction is restricted with respect to the structure. Or the peening treatment apparatus according to (7).

(9) The structure is a structure comprising two metal pipes having a cylindrical shape and joined by a weld extending in the circumferential direction,
the first direction is the width direction of the welded portion;
The support part is provided so as to be relatively movable in the circumferential direction with respect to the structure,
The first peening device is supported by the support portion so as to be able to perform peening treatment on one toe portion in the width direction of the welded portion,
The above (1) to (8), wherein the second peening device is supported by the support portion so as to be able to perform peening treatment on the toe portion on the other side in the width direction of the welded portion. The peening treatment device according to any one of.

(10) The peening treatment according to any one of (1) to (9) above for the welded portion of a structure comprising at least two metal members joined together by a welded portion extending in a predetermined direction. A method of performing peening treatment using a device,
the first direction is the width direction of the welded portion;
A peening treatment method, wherein the peening treatment is performed on the welded part by the first peening device and the second peening device while moving the support part in the predetermined direction relative to the structure.

(11) A structure comprising at least two metal members joined together by a series of welds extending in a predetermined direction, using the peening treatment apparatus according to any one of (1) to (9) above. A method of manufacturing,
the first direction is the width direction of the welded portion;
Simultaneously performing a peening treatment on the toe portions at both ends in the width direction of the welded portion,
A method of manufacturing a structure.

(12) The method for manufacturing a structure according to (11) above, wherein the welded portion is formed in an annular shape, and the structure is a tubular body.

According to the present invention, peening can be efficiently performed on welded portions of various shapes.

FIG. 1 is a schematic perspective view showing a peening apparatus according to one embodiment of the present invention. FIG. 2 is a perspective view showing a first coupling device; FIG. FIG. 3 is an exploded perspective view showing the first connecting device. FIG. 4 is a diagram showing another application example of the peening processing apparatus. FIG. 5 is a diagram showing another application example of the peening processing apparatus. FIG. 6 is a diagram showing another example of the peening processing device.

A peening apparatus and a peening method using the same according to an embodiment of the present invention will be described below with reference to the drawings.

(Device configuration)
First, the peening processing apparatus according to this embodiment will be described. FIG. 1 is a schematic perspective view showing a peening apparatus according to one embodiment of the present invention.

A peening treatment apparatus and a peening treatment method according to the present invention are an apparatus and method for performing a peening treatment on a welded portion of a structure having at least two metal members joined together by a welded portion extending in a predetermined direction. is. Further, the peening treatment method according to the present invention performs peening treatment on the welded portion of a structure including at least two metal members joined together by a welded portion extending in a predetermined direction, thereby reducing fatigue of the welded portion. It is also a method of manufacturing new structures with improved strength.

FIG. 1 shows, as an example of a structure to be peened by the peening apparatus according to the present invention, a structure 1 having at least two metal pipes 1a and 1b circumferentially welded to each other and having a circular tubular shape. part is shown. Further, in the structure 1 shown in FIG. 1, a weld bead (circumferential weld) 1c extending in the circumferential direction of the structure 1 so as to join the metal pipes 1a and 1b is peened by the peening treatment apparatus according to the present invention. is the welded part. The structure 1 is, for example, a tower for wind power generation.

As shown in FIG. 1, the peening apparatus 10 according to the present embodiment includes a support portion 12, a first peening device 14, a second peening device 16, a floating connecting portion 18, and an urging portion 20. ing. In addition, in FIG. 1 , the peening treatment device 10 is arranged inside the structure 1 . In the following, a case where a peening process is performed on a weld bead (welded portion) 1c formed in an annular shape from the inside of the structure 1 will be described.

The support part 12 is provided so as to be relatively movable with respect to the structure 1 in the welding direction of the weld bead 1c. In this embodiment, the weld bead 1c is formed to extend in the circumferential direction of the structure 1, as described above. Therefore, in this embodiment, the support part 12 is provided so as to be relatively movable in the circumferential direction of the structure 1 with respect to the structure 1 .

In addition, in the present embodiment, the support portion 12 is provided so as not to move in the width direction (first direction) of the weld bead 1c and in the radial direction (second direction) of the structure 1 during the peening process. is preferred. In this embodiment, the support part 12 is supported by a fixing member (not shown) so as not to move in the width direction of the weld bead 1c and in the radial direction of the structure 1 during the peening process. However, as long as the peening process can be performed appropriately, the support portion 12 may be moved to some extent in the width direction of the weld bead 1c and the radial direction of the structure 1 when performing the peening process. Although detailed description is omitted, when installing the peening treatment apparatus 10, the operator moves the support portion 12 in the width direction of the weld bead 1c and in the radial direction of the structure 1 to obtain an appropriate position. , the support portion 12 is arranged.

Various members that are relatively movable in the welding direction of the weld bead 1c can be used as the support portion 12. As shown in FIG. In this embodiment, for example, the member to which the welder is fixed when circumferentially welding the metal pipes 1a and 1b is used as the support portion 12. As shown in FIG. Although the method of relatively moving the support portion 12 in the welding direction of the weld bead 1c is not particularly limited, for example, a rotating mechanism used to rotate the metal pipes 1a and 1b when circumferentially welding the metal pipes 1a and 1b is used. may be used to rotate the structure 1 while the position of the support portion 12 is fixed.

The first peening device 14 is supported by the support portion 12 so that the peening process can be performed on the toe portion 2a on the one side of the weld bead 1c from one side in the width direction of the weld bead 1c. . In this embodiment, the width direction of the weld bead 1c means a direction perpendicular to the welding direction of the weld bead 1c when viewed from the radial direction of the structure 1. As shown in FIG. Therefore, in this embodiment, the width direction of the weld bead 1 c is parallel to the axial direction of the structure 1 .

The second peening device 16 is arranged in the width direction of the weld bead 1c so that the peening process can be performed on the toe portion 2b on the other side of the weld bead 1c from the other side in the width direction of the weld bead 1c. The other side of the 1-peening device 14 is supported by the supporting portion 12 .

Although the details will be described later, in the present embodiment, the first peening device 14 and the second peening device 16 are arranged to face each other in a predetermined direction (first direction) and are supported by the supporting portion 12 via the floating connecting portion 18 . ing. When performing the peening process, the first peening device 14 and the second peening device 16 are arranged so that the first direction, which is the direction in which they face each other, is the width direction of the weld bead 1c. As the first peening device 14 and the second peening device 16, various known devices capable of peening the toes 2a and 2b can be used.

In this embodiment, as shown in FIG. 1, as the first peening device 14, an ultrasonic impact device capable of performing ultrasonic impact treatment (UIT) with a striking pin 14a is used. Similarly, as the second peening device 16, an ultrasonic impact device capable of performing ultrasonic impact treatment (UIT) with a striking pin 16a is used. In this embodiment, the first peening device 14 includes a striking pin 14a, a horn 14b, and a body portion 14c. In addition, although illustration is omitted for the sake of complicating the drawing, a cylindrical pin holder is provided at the lower end of the body portion 14c so as to cover the horn 14b. It is supported so as to be able to vibrate in the axial direction of the pin 14a. The horn 14b is provided in the pin holder so as to be able to come into contact with the upper end portion of the striking pin 14a. The body portion 14c includes a transducer (not shown) inside and generates ultrasonic vibrations. The ultrasonic vibration generated by the main body portion 14c excites the striking pin 14a through the horn 14b, and the striking pin 14a generates an ultrasonic impact to strike the toe portion 2a.

In this embodiment, the first peening device 14 is supported by the support portion 12 so that the vibration direction of the horn 14b coincides with the vertical direction (second direction), which is also the radial direction of the structure 1. The striking pin 14a is provided so as to be inclined with respect to the vibration direction of the horn 14b. If the striking pin 14a is not inclined with respect to the vibration direction, the component force of the reaction force when striking the toe 2a is in the width direction of the weld bead 1c, that is, the direction in which the mechanical load is applied to the striking pin 14a. acts on The striking pin 14a is constructed and arranged so as to vibrate in the axial direction of the pin holder inside the pin holder. Due to the mechanical load, a frictional force is generated as a mechanical load between the striking pin and the pin holder, causing the striking pin to vibrate. Inhibits smooth vibration. Therefore, by inclining the striking pin 14a with respect to the vibration direction, the mechanical load applied to the striking pin 14a is reduced. Although not described, the second peening device 16 also includes a striking pin 16a, a horn 16b, and a main body 16c.

As shown in FIG. 1, in this embodiment, the weld bead 1c has a shape that rises slightly from the base material of the metal pipes 1a and 1b. In this embodiment, with the striking pins 14a and 16a inclined toward the base material, the tips of the striking pins 14a and 16a are used to strike the toes 2a and 2b. As a result, the tips of the striking pins 14a, 16a can be brought into proper contact with the toes 2a, 2b.

The floating connecting portion 18 is arranged so that the first peening device 14 and the second peening device 16 can move vertically with respect to the support portion 12 and in the width direction of the weld bead 1c. 16 is connected to the support 12 . In addition, the vertical direction (second direction) includes the vertical direction and a direction inclined with respect to the vertical direction. That is, the vertical direction is a direction that intersects the extending direction of the weld bead 1c and the width direction (first direction) of the weld bead 1c. In this embodiment, the floating connection 18 comprises a fixed plate 22 , a first connection device 24 and a second connection device 26 . The fixed plate 22 is fixed to the support portion 12 .

2 is a perspective view showing the first connecting device 24, and FIG. 3 is an exploded perspective view showing the first connecting device 24. As shown in FIG. As shown in FIGS. 2 and 3, the first connecting device 24 has a guide member 28, a linear slider 30 and a linear slider 32. As shown in FIG. The guide member 28 is fixed to the fixed plate 22 (see FIG. 1). The guide member 28 has a pair of guide rails 28a extending vertically on the surface opposite to the fixed plate 22 .

The linear slider 30 is attached to the guide rail 28a of the guide member 28 via a plurality of bearings (not shown). Specifically, the linear slider 30 moves along the guide rail 28a in a state in which movement in the thickness direction (projection direction of the guide rail 28a) and the width direction of the weld bead 1c are restricted with respect to the guide member 28. It is attached to the guide rail 28a so that it can move linearly in the vertical direction. The linear slider 30 has a pair of guide rails 30a extending in the width direction of the weld bead 1c (see FIG. 1) on the surface opposite to the guide member 28. As shown in FIG.

The linear slider 32 is attached to the guide rail 30a of the linear slider 30 via a plurality of bearings (not shown). Specifically, the linear slider 32 linearly moves in the width direction of the weld bead 1c in a state in which the linear slider 30 is restricted from moving in the thickness direction (protruding direction of the guide rail 30a) and in the vertical direction. It is attached to guide rails 30a so as to be movable.

2 and 3 show an example in which the guide member 28, the linear slider 30 and the linear slider 32 are each molded as a single piece, but the guide member 28, the linear slider 30 and the linear slider 32 are each formed in plural. It may be configured by combining the members of. For example, the guide member 28, the linear slider 30 and the linear slider 32 may be configured by combining three plate-like bodies and a plurality of male and female rails. More specifically, the guide member 28 includes a plate-like body and a guide rail 28a fixed to the surface of the plate-like body on the side of the linear slider 30, and the linear slider 30 includes the plate-like body and the guide rail 28a of the plate-like body. A groove member fixed to the surface of the member 28 and into which the guide rail 28a is fitted, and a guide rail 30a fixed to the opposite surface of the plate-like body. A groove member fixed to the surface of the linear slider 30 side of the shaped body and into which the guide rail 30a is fitted may be provided.

The first peening device 14 is attached to the surface of the linear slider 32 opposite to the linear slider 30 . As a result, the first peening device 14 can move with respect to the support portion 12 in the vertical direction, the width direction of the weld bead 1c, and the diagonal direction (the direction between the vertical direction and the width direction). The configuration of the first coupling device 24 shown in FIGS. 2 and 3 is merely an example. is restricted, the first peening device 14 may be supported so as to be able to move parallel to the support portion 12 in the vertical direction, the width direction of the weld bead 1c, and the oblique direction.

The second peening device 16 is connected to the support portion 12 via the second connecting device 26 and the fixing plate 22 . Although detailed description is omitted, the second connecting device 26 has the same configuration as the first connecting device 24 . As a result, the second peening device 16, like the first peening device 14, moves vertically, in the width direction of the weld bead 1c, and obliquely with respect to the support portion 12, while its movement in the thickness direction is restricted. It becomes possible to move parallel in the direction.

In addition, in the present embodiment, due to the configuration described above, the floating connection portion 18 (the first connection device 24 and the second connection device 26 ) can move the first peening device 14 and the second peening device 16 with respect to the support portion 12 . The first peening device 14 and the second peening device 16 are connected to the support portion 12 in a state in which movement of the weld bead 1c in the welding direction (the circumferential direction of the structure 1) is restricted. In other words, the first peening device 14 and the second peening device 16 are freely connected so as to move vertically, in the width direction of the weld bead 1c, and in the oblique direction within the same plane orthogonal to the welding direction of the weld bead 1c. It is supported by the support portion 12 via the portion 18 .

Referring to FIG. 1 , biasing portion 20 includes a first elastic member 34 , a second elastic member 36 , a third elastic member 38 and a fourth elastic member 40 . The first elastic member 34 , the second elastic member 36 , the third elastic member 38 and the fourth elastic member 40 are each supported by the supporting portion 12 via the fixed plate 22 of the floating connecting portion 18 .

The first elastic member 34 receives a force directed toward one side in the width direction of the weld bead 1c from the first peening device 14, and gives the first peening device 14 a reaction force directed toward the other side in the width direction of the weld bead 1c. . The second elastic member 36 receives from the second peening device 16 a force directed to the other side in the width direction of the weld bead 1c and gives the second peening device 16 a force directed to one side in the width direction of the weld bead 1c. Further, the third elastic member 38 receives an upward force from the first peening device 14 and gives a downward reaction force to the first peening device 14 . The fourth elastic member 40 receives an upward force from the second peening device 16 and gives a downward reaction force to the second peening device 16 . Coil springs, for example, can be used as the first elastic member 34, the second elastic member 36, the third elastic member 38, and the fourth elastic member 40, respectively. Note that the third elastic member 38 and the fourth elastic member 40 may not be provided in the peening processing apparatus 10 according to the present embodiment. For example, if the first peening device 14 and the second peening device 16 are provided with an impact absorbing mechanism (a mechanism for absorbing impact generated during the peening process), the third elastic member 38 and the fourth elastic member 40 are not provided. good too. Further, for example, when adjusting the weight of the first peening device 14 and the second peening device 16 to adjust the downward biasing force of the first peening device 14 and the second peening device 16, the third elastic member 38 and the fourth elastic member 40 may be omitted.

(Processing method and effects)
Next, a peening treatment method using the above-described peening treatment apparatus 10 and effects of the present embodiment will be described. In this embodiment, while the supporting portion 12 is moved relative to the structure 1 in the circumferential direction of the structure 1, the first peening device 14 and the second peening device 16 are used to remove the toe portion of the weld bead 1c. The peening process is performed on 2a and 2b at the same time.

Specifically, for example, the peening treatment is performed so that the toes 2a and 2b of the weld bead 1c and the vicinity thereof are plastically deformed. In this case, since the force applied to the weld bead 1c from the first peening device 14 and the second peening device 16 increases, the reaction force from the weld bead 1c causes the first peening device 14 and the second peening device 16 to perform welding. try to move away from the At this time, the inertial force due to the masses of the first peening device 14 and the second peening device 16 and the portions that hold them also acts together with this reaction force. However, in the peening apparatus 10 according to this embodiment, the reaction force applied from the weld bead 1c to the first peening device 14 can be offset by the reaction force applied from the weld bead 1c to the second peening device 16. As a result, it is possible to suppress the displacement of the peening device 10 in the width direction of the weld bead 1c due to the reaction force applied to the first peening device 14 and the second peening device 16 from the weld bead 1c.

Further, in this embodiment, the first peening device 14 and the second peening device 16 are provided so as to be movable in the width direction of the weld bead 1c with respect to the supporting portion 12 by the floating connecting portion 18 . Therefore, the first peening device 14 (hit pin 14a) and the second peening device 16 (hit pin 16a) are moved in the width direction of the weld bead 1c with respect to the support portion 12 so as to follow the shape of the weld bead 1c. can be made Therefore, for example, even if the weld bead 1c meanders or the width of the weld bead 1c fluctuates, the first peening device 14 (hitting pin 14a) and the second peening device 16 (hitting pin 16a) are stopped. It can be smoothly moved along the ends 2a and 2b.

Further, in the present embodiment, the biasing portion 20 applies a force directed to the other side in the width direction of the weld bead 1c to the first peening device 14, and applies a force directed to the one side in the width direction to the second peening device 16. give to As a result, even if the first peening device 14 and the second peening device 16 move in the width direction of the weld bead 1c due to the reaction force from the weld bead 1c, the first peening device 14 and the second peening device 16 move toward the weld bead 1c. can be properly contacted.

As a result, the striking positions of the striking pins 14a and 16a are located near the boundaries between the weld bead 1c and the metal pipes 1a and 1b, and the first peening device 14 (the striking pin 14a) and the second peening device 16 (Impact pin 16a) can be smoothly moved along the toes 2a and 2b.

Further, in the present embodiment, the first peening device 14 and the second peening device 16 are provided so as to be movable in the vertical direction by means of the floating connecting portion 18 . In this case, by appropriately setting the weights of the first peening device 14 and the second peening device 16 according to the processing conditions, the impact force applied to the weld bead 1c from the first peening device 14 and the second peening device 16 can be reduced to Can be easily and properly adjusted. It is possible to prevent a large vertical force from acting on the first peening device 14 and the second peening device 16 during the peening process. Thereby, damage to the first peening device 14 and the second peening device 16 can be sufficiently suppressed.

As described above, according to the peening treatment apparatus 10 according to the present embodiment, the peening treatment can be efficiently performed on the weld bead (welded portion) 1c.

In this embodiment, the first peening device 14 and the second peening device 16 are provided on both sides of the weld bead 1c in the width direction. As a result, the reaction force applied from the weld bead 1c to the first peening device 14 can be efficiently offset by the reaction force applied from the weld bead 1c to the second peening device 16. In the peening apparatus 10 according to the present embodiment, the first elastic member 34, the second elastic member 36, the third elastic member 38, and the fourth elastic member 40 of the urging portion 20 particularly move the weld bead 1c in the width direction and the width direction. The peening process can be performed while absorbing the impact in the vertical direction. This makes it possible to perform the peening process more efficiently. The mechanical properties (Young's modulus, spring constant, etc.) of the first elastic member 34, the second elastic member 36, the third elastic member 38, and the fourth elastic member 40 depend on the load to be applied to the weld bead 1c. It can be set as appropriate.

Further, in this embodiment, while the striking pins 14a and 16a are inclined, the tips of the striking pins 14a and 16a strike the toes 2a and 2b. In this case, the functions of the floating connecting portion 18 and the biasing portion 20 allow the striking pins 14a, 16a to automatically and accurately move to follow the toe portions 2a, 2b.

Further, in the present embodiment, as described above, the first peening device 14 and the second peening device 16 are applied along the toes (the toes 2a and 2b of the weld bead 1c) at both ends in the width direction of the weld. It can be moved smoothly. Therefore, the peening treatment apparatus 10 according to the present embodiment and the peening treatment method using the same include two metal members joined together by a series of welds (one linear weld). It is preferably used when manufacturing a structure with improved fatigue strength by performing peening treatment simultaneously on the toe portions at both ends in the width direction of the welded portion of the structure. In particular, the peening treatment apparatus 10 and the peening treatment method using the same according to the present embodiment can be applied to a tubular body having an annular welded portion for a structure to be manufactured, such as a tower for wind power generation. It can also be used preferably in certain cases.

In addition, as described above, the peening treatment is preferably performed in a state in which movement of the support portion 12 in the width direction of the weld bead 1c with respect to the structure 1 is restricted. In this case, it is possible to sufficiently suppress the displacement of the peening apparatus 10 in the width direction of the weld bead 1c.

In the above-described embodiment, the case where the member to which the welder is fixed when girth-welding the metal pipes 1a and 1b is used as the support portion 12 has been described. may be provided. In this case, for example, a pair of annular running rails extending in the circumferential direction along the welding bead 1c are provided on the inner surface of the structure 1 so as to sandwich the welding bead 1c, and the supporting portion 12 is formed along the running rails. The peening apparatus 10 may be configured to be movable in the circumferential direction of the object 1 . Specifically, for example, a pair or a plurality of pairs of wheels corresponding to a pair of running rails may be provided in the peening processing apparatus 10, and the support section 12 may be supported by the wheels. In this case, for example, while the structure 1 is rotated and the peening processing device 10 is run on the running rail so as to synchronize with the rotation of the structure 1, welding is performed by the first peening device 14 and the second peening device 16. A peening process can be performed on the bead 1c. In this embodiment, the pair of running rails and wheels can prevent the support portion 12 from moving in the width direction of the weld bead 1c. Although detailed explanation is omitted, the wheels are provided with derailment prevention functions (protrusions, etc. that are locked to the running rails) in the same way as the wheels of railway vehicles so that the wheels can be prevented from derailing from the running rails. is preferred. Also, the wheels may be fitted to the running rails to prevent the wheels from derailing from the running rails.

In the above-described embodiment, the case where the peening process is performed on the weld bead 1c from the inside of the structure 1 has been described, but the peening process may be performed on the weld bead 1c from the outside of the structure 1. In this case, as in the case where the weld bead 1c is subjected to the peening treatment from the inside of the structure 1, the support portion 12 is provided so as not to move in the width direction of the weld bead 1c and in the radial direction of the structure 1. preferably. Therefore, for example, the peening process may be performed using the member to which the welder was fixed when circumferentially welding the metal pipes 1a and 1b as a supporting portion. In addition, a pair of annular running rails extending in the circumferential direction along the welding bead 1c are provided on the outer surface of the structure 1 so as to sandwich the welding bead 1c, and the peening treatment device is attached to the structure 1 along the running rails. The peening process may be performed while moving relative to each other. In order to prevent the peening apparatus from falling, the wheels may be constructed using magnets.

In the above-described embodiment, the case of using the ultrasonic impact treatment device as the first peening device 14 and the second peening device 16 has been described. However, the devices that can be used as the first peening device 14 and the second peening device 16 are not limited to ultrasonic impact processing devices, and other impact processing devices (hammer peening devices, needle peening devices, etc.) may be used. .

In the above-described embodiment, the case where the peening treatment is performed on the circumferential welded portion has been described, but as shown in FIG. It can be performed. In addition, in the structure 3 shown in FIG. 4, the metal plate 3a is fillet-welded to the surface of the metal plate 3b. The T-shaped welded portion 4 (hereinafter referred to as the welded portion 4) includes a weld bead 4a provided on one side in the thickness direction of the metal plate 3a and a weld provided on the other side in the thickness direction of the metal plate 3a. bead 4b.

In the present embodiment, the thickness direction of the metal plate 3a is defined as the width direction of the welded portion 4, and the toe portion on one side in the width direction of the welded portion 4 (the toe portion of the weld bead 4a on the side of the metal plate 3b) is the first A peening treatment can be performed by the peening device 14 , and a peening treatment can be performed on the toe portion on the other side in the width direction of the welded portion 4 (the toe portion of the weld bead 4 b on the side of the metal plate 3 b ) by the second peening device 16 .

Further, although detailed description is omitted, the peening treatment apparatus 10 according to the present embodiment can also perform peening treatment on a structure 7 having a T-shaped welded portion 6 as shown in FIG. In addition, in the structure 7 shown in FIG. 5, the metal plate 3a is fillet-welded to the front surface of the metal plate 3b, and the metal plate 3c is fillet-welded to the rear surface of the metal plate 3b. In this embodiment as well, the peening treatment can be smoothly performed on the welded portion 6 by using the peening treatment device 10 on each of the front surface side and the rear surface side of the metal plate 3b.

Moreover, although illustration is omitted, the peening treatment apparatus according to the present invention can also be used for structures (for example, spiral steel pipes) provided with spirally formed welds. Specifically, by rotating the steel pipe while moving the support portion in the axial direction of the steel pipe with respect to the structure, the welded portion can be helically moved relative to the structure along the welding direction. A peening process can be performed in the same manner as in the embodiment. In this case, the positional relationship between the first peening device and the second peening device is orthogonal to the weld bead direction, so that the reaction force received by the first peening device is equal to the reaction force received by the second peening device. It is possible to offset appropriately by force. This is because if the positions of the first peening device and the second peening device are not perpendicular to the welded portion (weld bead), the direction of the reaction force at the time of impact will deviate. This is because the part where the is attached is twisted.

As described above, in the peening apparatus according to the present invention, the first peening apparatus and the second peening apparatus can be moved so as to follow the shape of the weld (weld bead). Therefore, according to the peening treatment apparatus according to the present invention, various shapes of welds (T-shaped or cross welds, circumferential welds, etc.) formed to extend in a predetermined direction (linear direction or circumferential direction) peening treatment can be performed efficiently.

In the above-described embodiment, the striking pins 14a, 16a are inclined with respect to the axial direction of the peening devices 14, 16 (the direction of the ultrasonic waves generated by the main bodies 14c, 16c and the vibration direction of the horns 14b, 16b). However, as shown in FIG. 6, the peening devices 14 and 16 are arranged vertically so that the axial directions of the peening devices 14 and 16 are aligned with the axial directions of the striking pins 14a and 16a. It may be attached to the connecting device 24, 26 by tilting it obliquely.

Further, in the above-described embodiment, the floating connection portion 18 is arranged so that the first peening device 14 and the second peening device 16 can move with respect to the support portion 12 in the vertical direction and in the width direction of the weld bead 1c. A peening device 14 and a second peening device 16 are coupled to the support 12 . However, if each of the first peening device 14 and the second peening device 16 is configured to absorb the impact of the hitting by the hitting pins 14a and 16a, the first peening device 14 and the second peening device 16 are separated by the floating connecting portion 18. It is not essential that the connection to the support portion 12 is vertically movable. On the other hand, since the first peening device 14 and the second peening device 16 are configured to be vertically movable with respect to the support portion 12, the surface of the metal pipes 1a and 1b to be processed is wavy. Even if the distance between the peening device and the object to be processed varies for some reason, it can be followed.

According to the present invention, peening can be efficiently performed on welded portions of various shapes.

Reference Signs List 1, 3 structure 1a, 1b metal pipe 2a, 2b toe 3a, 3b metal plate 4 T-shaped weld 10 peening device 12 support 14 first peening device 16 second peening device 18 floating coupling 20 bias Department

Claims (12)

An apparatus for performing a peening process on a structure, comprising: a support section;
a first peening device and a second peening device arranged oppositely in a first direction;
a floating coupling portion coupling the first peening device and the second peening device to the support portion so that the first peening device and the second peening device can reciprocate relative to the support portion in the first direction; When,
a force directed toward the second peening device in the first direction, and a force directed toward the first peening device in the first direction; and a biasing portion for
A peening processor. The floating connecting portion is
The first peening device and the second peening device are mounted on the supporting portion so that the first peening device and the second peening device can reciprocate relative to the supporting portion in a second direction perpendicular to the first direction. concatenate to
The peening treatment apparatus according to claim 1. 3. The peening apparatus according to claim 2, wherein said biasing portion further imparts a force toward one side in said second direction to said first peening device and said second peening device. The floating connecting portion is
a first connecting device that connects the first peening device and the support so that the first peening device can reciprocate with respect to the support in the first direction and the second direction;
a second connecting device that connects the second peening device and the support so that the second peening device can reciprocate with respect to the support in the first direction and the second direction;
The urging portion is
a first elastic member that receives a force directed toward one side in the first direction from the first peening device and applies a reaction force directed toward the other side in the first direction to the first peening device;
a second elastic member that receives a force directed toward the other side in the first direction from the second peening device and applies a reaction force directed toward the one side in the first direction to the second peening device; The peening treatment apparatus according to claim 2 or 3. The biasing portion further
a third elastic member that receives a force directed toward the other side in the second direction from the first peening device and applies a reaction force directed toward the one side in the second direction to the first peening device;
a fourth elastic member that receives a force directed toward the other side in the second direction from the second peening device and applies a reaction force directed toward the one side in the second direction to the second peening device; The peening treatment apparatus according to claim 3 or 4. The structure is a structure comprising at least two metal members joined together by a weld extending in a predetermined direction,
the first direction is the width direction of the welded portion;
The first peening device,
supported by the support portion so that peening can be performed on the toe portion on one side in the width direction of the welded portion;
The second peening device is
It is supported by the support part so that peening treatment can be performed on the toe part on the other side in the width direction of the weld part,
The peening treatment apparatus according to any one of claims 1 to 5. The floating connecting portion connects the first peening device and the second peening device to the supporting portion while restricting the movement of the first peening device and the second peening device in the predetermined direction with respect to the supporting portion. 7. The peening apparatus of claim 6, coupled to a support. 8. The support part according to claim 6, wherein the support part moves relative to the structure in the predetermined direction while movement of the welded part in the width direction is restricted with respect to the structure. peening treatment equipment. The structure is a structure comprising two metal pipes having a circular tubular shape and joined by a circumferentially extending weld,
the first direction is the width direction of the welded portion;
The support part is provided so as to be relatively movable in the circumferential direction with respect to the structure,
The first peening device is supported by the support portion so as to be able to perform peening treatment on one toe portion in the width direction of the welded portion,
9. The second peening device according to any one of claims 1 to 8, wherein the second peening device is supported by the supporting portion so as to perform peening treatment on the toe portion on the other side in the width direction of the welded portion. A peening treatment apparatus according to one. A peening treatment using the peening treatment apparatus according to any one of claims 1 to 9 on the welded portion of a structure comprising at least two metal members joined together by a welded portion extending in a predetermined direction. a method of performing
the first direction is the width direction of the welded portion;
A peening treatment method, wherein the peening treatment is performed on the welded part by the first peening device and the second peening device while moving the support part in the predetermined direction relative to the structure. A method for manufacturing a structure comprising at least two metal members joined together by a series of welds extending in a predetermined direction, using the peening apparatus according to any one of claims 1 to 9. ,
the first direction is the width direction of the welded portion;
Simultaneously performing a peening treatment on the toe portions at both ends in the width direction of the welded portion,
A method of manufacturing a structure. 12. The method of manufacturing a structure according to claim 11, wherein the welded portion is formed in an annular shape, and the structure is a tubular body.

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