JP2020192659A - Peening system and peening method - Google Patents

Abstract

To reduce a physical burden of an operator in a site of a structural steelwork where peening is performed to a welded part.SOLUTION: A peening system 1 includes: a peening device 2; a wire 3 connected to the peening device 2; a magnet device 4 attached to an attachment surface 11 of a steel structure 10 by magnetic force; and a force application device 5 which is supported by the magnetic device 4 and applies a force to the wire 3 to bias the peening device 2 to the attachment surface 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a peening system and a peening method.

For example, at the site of a steel structure such as a steel bridge, a process using a peening device is performed for the purpose of improving the fatigue life of the welded portion (see, for example, Non-Patent Document 1). The peening device is a device that continuously and at high speed hits the welded portion by using the vibration of a hard pin to improve the fatigue strength of the welded portion. As a peening device, ultrasonic impact treatment (UIT, Ultrasonic Impact Treatment) that vibrates a pin using ultrasonic vibration and pneumatic needle peening (PPP, Portable Pneumatic needle-Peening) that vibrates a pin using compressed air. Etc. are known.

Kei Kakinoki, 5 others, "Verification of workability of preventive maintenance measures using peening method", 73rd Annual Academic Lecture Meeting of Japan Society of Civil Engineers, August 2018, VI-278, p.555-p. 556

By the way, the hand tool of the peening device weighs several kg, and the worker puts it on the welded part formed on the downward facing surface such as the upper end of the rib welded to the back surface of the steel deck of the steel bridge. On the other hand, when the work is performed upward, there is a problem that the physical burden on the worker is large. Also, when working sideways to a welded part formed on a side facing surface such as a welded part of gussets welded to the web of a plate girder, if the working time becomes long, the worker's physical fatigue Accumulation cannot be ignored.

Therefore, the present invention provides a peening system capable of reducing the physical burden on the operator when performing work on a welded portion formed on a surface facing downward or a surface facing sideways using a peening device. The purpose is to provide a peening method.

According to a certain aspect of the present invention, the peening system is supported by a peening device, a wire connected to the peening device, a magnet device magnetically attached to a mounting surface of the steel structure, and the magnet device. A force device for urging the peening device toward the mounting surface by applying a force to the wire is provided.

The peening system may have a direction changing mechanism in which the wire drawn from the force device is hung around and changes the extending direction of the wire.

In the peening system, the wire may be pulled out along the mounting surface.

In the above peening system, the direction changing mechanism has a cylindrical outer peripheral surface, and the wire may be hung around the outer peripheral surface.

In the above-mentioned peening system, the peening device may be an ultrasonic striking device that strikes by ultrasonic vibration.

According to another aspect of the present invention, the peening method performs a peening process using any of the above peening systems.

According to the above configuration, since the peening device is urged toward the mounting surface via the wire, the load of the peening device borne by the operator is reduced, whereby the burden on the operator can be reduced. ..
Further, by using a magnet device using magnetic force, the force applying device can be easily attached to the steel structure.

It is a side view of the peening system which concerns on embodiment of this invention. FIG. 2 is a view taken along the line II-II of FIG. It is a figure which shows the schematic structure example of the peening apparatus which concerns on embodiment of this invention. It is a side view when the peening system is applied to the welded part between the back surface of a steel deck and a vertical rib. It is a side view when the peening system is applied to the welded part of gussets welded to the web of a plate girder. It is a side view of another form when a peening system is applied to the welded part of gussets welded to the web of a plate girder.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

1 and 2 are diagrams showing a schematic configuration of a peening system according to an embodiment of the present invention. FIG. 1 is a side view, and FIG. 2 is a view taken along the line II-II of FIG. As shown in FIGS. 1 and 2, the peening system 1 includes a peening device 2, a wire 3 connected to the peening device 2, and a back surface 11 (a mounting surface facing downward) of a steel deck 10 (steel structure). ), A magnet device 4 attached to the magnet device 4 by magnetic force, a force device 5 supported by the magnet device 4, and a roller 7 which is a direction changing mechanism of the wire 3. The peening device 2 is a device capable of striking the welded portion 13 formed on the back surface 11 of the steel plate 10 as described later. In the peening system 1 of the present embodiment, the peening device 2 which is a heavy object is generated on the wire 3 by the magnetic force of the magnet device 4 on the back surface 11 of the steel deck 10 and the force device 5 connected to the magnet device 4. Support by using the force to make you.

The magnet device 4 has a magnet device main body 41 and a lever 42 that turns on / off the magnetic force. A permanent magnet such as a neodymium magnet is built in the magnet device main body 41. The magnet device 4 is attached to the back surface 11 of the steel plate 10 via the suction surface 43 by the magnetic force of the permanent magnet. The magnet device 4 and the force device 5 are connected by a connecting member 6. The force device 5 is arranged in the vicinity of the back surface 11 by being supported by the magnet device 4 attached to the back surface 11 of the steel plate bridge 10.
When the magnet device 4 using magnetic force is used, the force device 5 can be easily attached to the steel plate bridge 10. The magnet device 4 is not limited to one having a built-in permanent magnet, and for example, a magnet device using an electromagnet can also be used. In the present embodiment, by using a permanent magnet as the magnet of the magnet device 4, the device can be made smaller and lighter than, for example, using an electromagnet.

The force device 5 is a device that urges the peening device 2 (hand tool 21) upward, that is, toward the back surface 11 of the steel plate 10 by applying a force to the wire 3. The force device 5 of the present embodiment has a casing 51 and an elastic member 52 (such as a spiral spring) arranged in the casing 51, and applies a force to the wire 3 by winding the wire 3. The wire 3 is connected to the elastic member 52, and the force device 5 winds up the wire 3 by utilizing the elasticity of the elastic member 52. At this time, an upward urging force is generated on the wire 3. The force device 5 may be capable of adjusting the strength of winding of the wire 3 by the elastic member 52, that is, the magnitude of the urging force. The casing 51 has, for example, a box shape and has a side surface 53, an upper surface 54, and a lower surface 55. The wire 3 is pulled out from an opening 56 provided in the side surface 53 of the casing 51. As shown in the drawing, since the upper surface 54 of the casing 51 is in contact with the back surface 11 of the steel deck 10, the wire 3 runs from the side surface 53 of the casing 51 along the back surface 11 of the steel deck 10 (in the substantially horizontal direction). , Will be pulled out in the direction toward the magnet device 4.

In the illustrated example, the roller 7 is arranged between the magnet device 4 and the force device 5. That is, in the peening system 1 of the present embodiment, the magnet device 4, the roller 7, and the force device 5 are arranged in the order of the magnet device 4, the roller 7, and the force device 5 along the back surface 11 (mounting surface). ing.
The roller 7 has a cylindrical outer peripheral surface and is rotatably supported by a rotating shaft 71. One end of the rotating shaft 71 is fixed to the connecting member 6. The rotating shaft 71 intersects the direction in which the wire 3 drawn from the force device 5 extends when the magnet device 4 and the force device 5 are attached to the back surface 11 of the steel deck 10, and the steel plate slab 71. The axis A of the rotating shaft 71 is arranged so as to extend in the direction along the back surface 11 of the 10. The roller 7 is arranged so that the height of the upper end of the outer peripheral surface thereof is the same as the height of the opening 56 for the wire 3. The wire 3 pulled out from the force device 5 in the direction along the back surface 11 of the steel plate 10 can be turned downward by being hung around the roller 7. Therefore, the roller 7 functions as a direction changing mechanism of the wire 3. By arranging the force device 5 and the roller 7 at a position close to the back surface 11 of the steel plate 10, for example, a wider work space for peening work can be secured.

By changing the extending direction of the wire 3 using the roller 7, for example, even when the wire 3 is pulled out from the force device 5 in the direction along the back surface 11 of the steel plate bridge 10, the wire 3 is not burdened. The extending direction of the wire 3 can be changed downward. In the present embodiment, by using the roller 7 having a cylindrical outer peripheral surface as a direction changing mechanism, the wire 3 slides on the outer peripheral surface of the roller 7 even when the wire 3 is pulled in an oblique direction by an operator, for example. By doing so, the power can be pardoned.
Further, by arranging the roller 7 between the magnet device 4 and the force device 5 and setting the point where the tensile force of the wire 3 acts in the vicinity of the magnet device 4, the connecting member 6 is brought into contact with the weight of the peening device 2. The moment acting to peel off the magnet device 4 through the magnet device 4 can always be reduced.

According to the peening system according to the embodiment of the present invention as described above, the hand tool 21 of the heavy peening device 2 is made of steel by the force device 5 arranged above the operator via the wire 3. Since the peening device 2 is urged toward the back surface 11 of the floor slab 10, the load of the peening device 2 borne by the operator is reduced, whereby the burden on the operator can be reduced.

Further, by using the roller 7 that functions as a direction changing mechanism, the direction of the wire 3 drawn out from the force device 5 is not the direction away from the mounting surface (back surface 11 in this embodiment) but the direction toward the magnet device 4. can do. This makes it possible to arrange the force device 5 along the mounting surface (arrangement that minimizes the thickness from the mounting surface), secure a wider work space for peening work, and have a predetermined length. It is possible to secure the degree of freedom of operation of the hand tool 21 having the above.
The striking process is performed by the direction in which the wire 3 is pulled out toward the magnet device 4 and the roller 7 (direction changing mechanism, position where the wire is applied) is arranged between the magnet device 4 and the force device 5. Workability can be improved according to the shape of the part and the processing range.

Further, in the peening system 1 of the present embodiment, the configuration excluding the peening device 2, that is, the magnet device 4, the force device 5, the roller 7, and the wire 3 has a configuration capable of securing, for example, an urging force of 5 kg. However, since the total weight can be about 2 kg, the burden on the operator to carry around is small.

(Configuration of peening device)
FIG. 3 is a diagram showing a schematic configuration example of the peening device 2 according to the embodiment of the present invention. In the illustrated example, the peening device 2 is an ultrasonic impact device that performs ultrasonic impact treatment (UIT).
As shown in FIG. 3, the peening device 2 has a hand tool 21 and a power supply device 22 that is electrically connected to the hand tool 21. The power supply device 22 is a portion to be placed on a floor surface or the like, and the hand tool 21 is a portion to be gripped by an operator. The weight of the hand tool 21 is about 3 kg to 4 kg.
The power supply device 22 supplies an alternating current to the ultrasonic wave oscillator 24 (coil 242) in the hand tool 21.

The hand tool 21 vibrates the cylindrical cover portion 23, the ultrasonic oscillating portion 24 built in the cover portion 23, the waveguide portion 25 that vibrates due to the vibration of the ultrasonic oscillating portion 24, and the waveguide portion 25. It has a spring 26 that functions as a buffer for absorbing, and a striking pin 27 provided at the tip of the waveguide 25.
The waveguide 25 has a cylindrical waveguide main body 251 along the inner peripheral surface of the cover portion 23, and the spring 26 is arranged along the outer peripheral surface of the waveguide main body 251.

The ultrasonic wave oscillating unit 24 has a vibrating unit 241 and a coil 242 wound around the vibrating unit 241. The vibrating portion 241 is connected to the rear end of the waveguide portion 25.
A grip 28 may be attached to the cover portion 23. Further, a cooling device for cooling the ultrasonic oscillation unit 24 in the cover unit 23 may be provided.

In the peening device 2, the waveguide 25 and the striking pin 27 vibrate due to the ultrasonic vibration generated in the ultrasonic oscillating unit 24. The object can be hit with the vibrating hit pin 27.

Further, since the spring 26 is built in the hand tool 21 of the peening device 2, the reaction during work can be set to be less than or equal to the repulsive force (about 3 kg) of the spring 26. However, even when using pneumatic needle peening (PPP) or electric peening device, by urging with a larger winding force, not only the weight of the hand tool but also the recoil during work can be reduced. You can also do it. In PPP, the weight of the hand tool is about 2 kg, but the recoil during work is considerably larger than that of UIT.

(Peening method using peening system)
Next, with reference to FIG. 1 again, a peening method for performing peening processing using the peening system 1 of the present embodiment will be described.
The operator attaches the magnet device 4 and the force device 5 to the back surface 11 of the steel plate bridge 10.
Next, the wire 3 drawn from the force device 5 is hung around the roller 7 and then connected to the hand tool 21 of the peening device 2. Next, the force device 5 is adjusted according to the weight of the hand tool 21 so that the hand tool 21 does not burden the operator and the winding force is as desired by the operator.

As a result, the operator can improve workability with respect to the welded portion 13 at the upper end of the U rib 12 provided on the back surface 11 of the steel plate bridge 10 as shown in FIGS. 1 and 3, and is light. You can work with a load.

Further, as shown in FIG. 4, it is possible to reduce the burden on the operator with respect to the welded portion 13A between the back surface 11 of the steel plate 10 and the plate-shaped vertical rib 12A.

Further, as shown in FIG. 5, the work is also performed when working sideways with respect to the welded portion formed on the side facing surface such as the welded portion 13B of the gussets 12B welded to the web 10B of the plate girder. The burden on the person can be reduced. That is, even when the magnet device 4 and the force device 5 are attached to the side facing surface, the roller 7, which is a direction changing function, changes the direction of the wire 3 to hinder the movement of the wire 3 due to the striking process. There is nothing to do. Further, the moment acting to peel off the magnet device 4 from the position where the magnet device 4 is attached can be reduced.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

1 ... peening system, 10 ... steel deck, 11 ... back surface (mounting surface), 12 ... rib, 13 ... welded part, 2 ... peening device, 21 ... hand tool, 22 ... power supply device, 23 ... cover part, 24 ... Ultrasonic oscillating part, 241 ... vibrating part, 242 ... coil, 25 ... waveguide part, 251 ... waveguide body, 26 ... spring, 27 ... striking pin, 28 ... grip, 3 ... wire, 4 ... magnet device, 41 … Magnet device body, 42… lever, 43… attraction surface, 5… force device, 51… casing, 52… elastic member, 53… side surface, 54… top surface, 55… bottom surface, 56… opening, 6… connecting member, 7 ... Roller, 71 ... Rotating axis, A ... Axis.

Claims (6)

With a peening device
The wire connected to the peening device and
A magnet device that is magnetically attached to the mounting surface of a steel structure,
A force device supported by the magnet device and urging the peening device toward the mounting surface by applying a force to the wire.
A peening system equipped with. The peening system
The peening system according to claim 1, further comprising a direction changing mechanism in which the wire drawn from the force device is hung around and changes the extending direction of the wire. The peening system according to claim 2, wherein the wire is pulled out in a direction along the mounting surface. The direction changing mechanism has a cylindrical outer peripheral surface and has a cylindrical outer peripheral surface.
The peening system according to claim 2 or 3, wherein the wire is hung around the outer peripheral surface. The peening system according to any one of claims 1 to 4, wherein the peening device is an ultrasonic striking device that strikes by ultrasonic vibration. A peening method in which a peening process is performed using the peening system according to any one of claims 1 to 5.

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