JP7226155B2 - Peening processing equipment - Google Patents

Description

The present invention relates to a peening processing apparatus.

As a measure against fatigue at the weld toe of welded structures, not only is the shape of the weld toe improved by a grinder, but residual stress control technology for the weld toe by various peening treatments such as ultrasonic impact treatment is used. there is
In the ultrasonic impact treatment, an ultrasonic impact is applied to the material to be treated through an impact pin arranged between the ultrasonic waveguide and the material to be treated. In general, the striking pin is arranged so that the direction of vibration of the ultrasonic waveguide and the direction of generation of the ultrasonic impact are aligned. However, in order to perform the peening treatment in the narrow section, it is preferable to generate the ultrasonic impact in a direction different from the vibration direction of the ultrasonic waveguide.

Therefore, for example, in Patent Document 1, the tip surface of a waveguide that vibrates with ultrasonic waves is provided at an angle to the axial direction of vibration, and an impact pin is arranged at an angle close to perpendicular to the tip surface. A peening apparatus is disclosed. By arranging the impact pin in this way, it is possible to generate an ultrasonic impact in a direction oblique to the axial direction of the ultrasonic vibration by the waveguide. However, in the peening apparatus of Patent Document 1, the limit of the inclination angle of the striking pin with respect to the axial direction of the ultrasonic vibration by the waveguide is 20 to 45 degrees. Therefore, it may be difficult to apply the technique of Patent Document 1 in a narrow space.

Further, Patent Document 2 describes an ultrasonic impact treatment device capable of bending up to 120 degrees at which the waveguide itself resonates. However, in the technique of Patent Document 2, since the shape of the waveguide is fixed, it is difficult to adjust the angle, and it is also difficult to design and manufacture a resonant waveguide.

In addition, the peening processing apparatus of Patent Document 3 includes a plurality of waveguide pins that are arranged with slightly different attachment angles between the ultrasonically vibrating waveguide and the impact pin. By arranging a plurality of waveguide pins in this manner, it is finally possible to generate an ultrasonic impact in a direction greatly inclined with respect to the direction of ultrasonic vibration of the waveguide. However, in the peening treatment apparatus of Patent Document 3, since a plurality of waveguide pins having a certain length are used in a row, the tip of the apparatus tends to be large. Therefore, it may be difficult to apply the technique of Patent Document 3 in a narrow space.

JP-A-2006-55799 Japanese Patent Publication No. 2009-504397 JP 2015-73939 A

As described above, in the conventional peening apparatus, it is sometimes difficult to greatly change the direction of mechanical vibration such as ultrasonic vibration for peening in a narrow space. Therefore, for example, when peening the weld toe on the web side inside the scalloped portion of the column-to-beam joint of a box column and an H-shaped steel beam, conventional peening equipment cannot be used because the space on the column side is small. In some cases, the weld toe could not be peened. Hereinafter, peening by applying impact in a direction different from the direction of the mechanical vibration generated by the mechanical vibration generator may be referred to as "angle processing".

SUMMARY OF THE INVENTION It is an object of the present invention to provide a peening apparatus capable of angle processing in a narrow space.

In order to solve the above problems, the peening treatment apparatus of the present invention includes:
a waveguide for propagating mechanical vibration generated by a mechanical vibration generator;
a striking pin having an arc-shaped portion, one end of which contacts the waveguide to propagate the mechanical vibration, and the other end of which strikes the material to be treated;
a pin holding mechanism that holds the striking pin so as to vibrate;
characterized by comprising

Here, the one end of the striking pin means one end of the striking pin or one end including the one end. Further, the other end of the striking pin means the other end of the striking pin or the other end including the other end. In addition, in the present invention, the “arcuate shape” is not limited to a strict arcuate shape in consideration of the working accuracy of the striking pin, and may be a substantially arcuate shape.

Further, in the configuration of the present invention, the contact surface of the waveguide with which the one end of the striking pin contacts may be inclined with respect to a plane perpendicular to the vibration direction of the mechanical vibration.

Further, in the above configuration of the present invention, the pin holding mechanism includes a plurality of pin folder portions having through holes through which the striking pins are inserted, and one end portion of each of the pin folder portions being in contact with the pin folder portion. and a pin folder axis that limits the movement of
The pin folder shaft may be arranged closer to the center of the arc than the striking pin.

Here, the one end of the pin folder means one end of the pin folder or one end including the one end.

Further, in the above configuration of the present invention, the inner peripheral surface of the through hole of the pin folder portion and the outer peripheral surface of the striking pin are separated from each other, and the pin holder portion and the outer peripheral surface of the striking pin are in contact with each other. A stop is further provided,
At least a portion of the pin stopper that is in contact with the outer peripheral surface of the striking pin may vibrate together with the vibration of the striking pin.

Moreover, the said structure of this invention WHEREIN: A some said pin folder part may be united with the said one end part of the said pin folder part.

Moreover, the said structure of this invention WHEREIN: The said one end part of the said some pin folder part may be rotatable along the outer peripheral surface of the said pin folder shaft.

ADVANTAGE OF THE INVENTION According to this invention, the peening processing apparatus which enables angle processing in a narrow space can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows typically some peening processing apparatuses which concern on the 1st Embodiment of this invention. FIG. 2 is a plan view schematically showing a tip portion of the peening apparatus shown in FIG. 1; FIG. 2 is a plan view schematically showing the striking pin, the pin folder part and the pin folder shaft shown in FIG. 1, and a perspective view schematically showing the pin retaining tool removed from the pin folder part; FIG. 4 is a diagram schematically showing a cross section of the pin retainer along line IV-IV shown in FIG. 3, and a cross section of a portion of the pin folder portion and the striking pin; It is a perspective view which shows typically the pin folder part and pin folder shaft which are shown in FIG. It is a side view which shows typically a part of peening processing apparatus which concerns on the 2nd Embodiment of this invention. FIG. 1 shows variations of the striking pin shown in FIG. 1, where (a) is a cross-sectional view of a striking pin having an elliptical cross section, (b) is a cross-sectional view of a striking pin having a square cross section, and (c) is a cross-sectional view. is a cross-sectional view of a triangular striking pin. (a) is a figure which shows the modification of a pin folder part, (b) is a figure which shows the other modification of a pin folder part. It is a cross-sectional view showing a modification of the pin stopper.

A peening apparatus according to an embodiment of the present invention will be described below.

1. First Embodiment [Configuration of Peening Processing Apparatus]
FIG. 1 is a side view schematically showing part of a peening apparatus 10 according to a first embodiment of the present invention. More specifically, FIG. 1 schematically shows the side surface of the tip of the peening device 10 according to the first embodiment and the cross section of the material 8 to be peened by the peening device 10 . It is a diagram.
2 is a plan view schematically showing the tip of the peening apparatus 10 shown in FIG. 1. As shown in FIG.
In the following description, the left side in FIGS. 1 and 2 may be called the front, and the right side may be called the rear.
Further, in the following description, one end refers to one end or one end including the one end, and the other end refers to the other end or the other end including the other end.

As shown in FIGS. 1 and 2, the peening apparatus 10 of the first embodiment includes a waveguide 6, a striking pin 1, and a pin holding mechanism 11 as main components.

<Wave guide>
The waveguide 6 propagates forward the mechanical vibration generated by a mechanical vibration generator (not shown) arranged behind the waveguide 6 . This mechanical vibration generator generates mechanical vibrations of 50 Hz or more including, for example, ultrasonic vibrations. In the following description, it is assumed that the mechanical vibration generator generates ultrasonic vibrations. The mechanical vibration generator generates ultrasonic vibrations in the horizontal direction in FIGS. 1 and 2 . At this time, the waveguide 6 is also ultrasonically vibrated in the horizontal direction in FIGS.

The waveguide 6 of the first embodiment is formed in a substantially rectangular parallelepiped shape elongated in the front and rear (right and left in FIGS. 1 and 2), and the illustration of the rear end is omitted. The tip surface 6a of the waveguide 6, that is, the contact surface of the waveguide 6 that contacts the one end portion 1a of the striking pin 1 is perpendicular to the vibration direction of the ultrasonic vibration transmitted to the waveguide 6 from the mechanical vibration generator. It is inclined to the striking pin 1 side with respect to the plane S. More specifically, as shown in FIG. 1, in a cross section parallel to the vibration direction of the waveguide 6 and including one end 1a and the other end 1b of the striking pin 1, the front end face 6a of the waveguide 6 is It is slanted so that the end closer to the part with which the one end 1a of the striking pin 1 contacts is closer to the striking pin 1 (forward) than the farther end. The angle θ between the tip surface 6a of the waveguide 6 and the surface S is preferably 35° or less, and can be set to 20°, for example.

<Blowing pin>
The striking pin 1 has an arcuate portion 1c in a cross section parallel to the vibration direction of the waveguide 6 and including one end portion 1a and the other end portion 1b of the striking pin 1. As shown in FIG. In the example shown in FIG. 1, the striking pin 1 is formed in an arc shape as a whole. However, the shape of the striking pin 1 is not limited to this, and at least a portion of the striking pin 1 may be formed in an arc shape.

One end 1a of the striking pin 1 is in contact with the tip surface 6a of the waveguide 6, and the striking pin 1 propagates the ultrasonic vibration. In this case, one end portion 1a of the striking pin 1 makes point or surface contact with the tip surface 6a of the waveguide 6. As shown in FIG. It is desirable that the vicinity of the axial center of the striking pin 1 contacts the tip surface 6 a of the waveguide 6 . As one end portion 1a of the striking pin 1 contacts the waveguide 6 in this way, ultrasonic vibration is transmitted to the striking pin 1, and the other end portion 1b of the striking pin 1 causes the processing portion 9 of the material 8 to be treated. You can hit. The other end portion 1b of the striking pin 1, that is, the end surface of the striking pin 1 on the side that contacts the material 8 to be treated is preferably convex outward and is curved or flattened.

The thickness of the striking pin 1 is not particularly limited as long as it can generate ultrasonic impact applied to the material 8 to be treated. However, practically, it is desirable that the thickness of the striking pin 1 is 2.5 mm or more and 10 mm or less. By setting the thickness of the striking pin 1 to 2.5 mm or more, it is possible to suppress damage to the striking pin 1 when the ultrasonic impact is transmitted from the striking pin 1 to the material 8 to be treated. On the other hand, by setting the thickness of the striking pin 1 to 10 mm or less, the mass of the striking pin 1 can be reduced, which facilitates the generation of ultrasonic impact.

Also, the length of the arc portion 1c is preferably determined by the central angle of the arc portion 1c and the radius of the arc. Specifically, the center angle of the arc portion 1c of the striking pin 1 is preferably 30° or more and less than 160°, and the radius of the arc of the arc portion 1c is 3 to 8 times the thickness of the striking pin 1. It is desirable that: By restricting the upper limit of the length of the circular arc portion 1c in this way, the striking pin 1 bends when the ultrasonic impact is transmitted from the striking pin 1 to the material 8 to be treated, and the strength of the striking pin 1 becomes insufficient. is suppressed. Further, by limiting the lower limit of the length of the arc portion 1c as described above, it becomes easier to transmit the ultrasonic impact from the striking pin 1 to the material 8 to be treated.

The striking pin 1 is made of, for example, high-strength steel. More specifically, it is preferable that the striking pin 1 is made of steel having a HRc of 60 or more and has a yield strength that exceeds the strength of the material 8 to be treated.

<Pin holding mechanism>
The pin holding mechanism 11 holds the striking pin 1 so as to vibrate. In the first embodiment, the pin holding mechanism 11 includes a plurality of pin folder portions 2 , pin folder shafts 3 , pin retainers 4 , and pin folder shaft retainers 5 . These will be described below.

(Pin folder part)
Each pin folder portion 2 is a plate-like portion, and FIG. 1 shows an example in which two pin folder portions 2 are provided. Further, as shown in FIG. 2, each pin folder portion 2 has a through hole 2h through which the striking pin 1 is inserted. In the pin holding mechanism 11 of the first embodiment, the striking pin 1 is inserted into the through hole 2h of each pin folder portion 2 so that the inner peripheral surface of the through hole 2h and the outer peripheral surface of the striking pin 1 are separated. be done. In the pin holding mechanism 11 of the first embodiment, the striking pin 1 inserted through the through hole 2h is held by the pin folder portion 2 via the pin stopper 4, which will be detailed later.

As described above, at least a portion of the striking pin 1 is arc-shaped, and the arc-shaped portion 1c is inserted through the through hole 2h of the pin holder portion 2. As shown in FIG.

Moreover, each pin folder part 2 of 1st Embodiment is integrated in the one end part 2a, and is arrange|positioned so that a mutual distance may become large as it goes to the other end part 2b from the one end part 2a. That is, the two pin folder portions 2 are arranged in a substantially V shape as shown in FIG. Such a plurality of pin folder portions 2 are formed, for example, by bending a sheet of plate-like body having through holes 2h formed on both end sides thereof at an intermediate portion in the longitudinal direction.

Further, the other end portion 2b of each pin folder portion 2 is a free end. Since the other end portion 2b of each pin folder portion 2 is a free end in this manner, the pin folder portion 2 hardly interferes with the vibration of the striking pin 1. As shown in FIG. In order to make the vibration of the striking pin 1 less likely to be disturbed, the pin folder portion 2 is made of a material that has high strength and allows elastic vibration, such as a high-strength steel sheet (spring material) with a thickness of about 0.5 mm to 1.0 mm. It is desirable to consist of
A chamfered portion 2c may be formed on the other end portion 2b of the pin folder portion 2 as indicated by a two-dot chain line in FIG.

(Pin stopper)
3 is a plan view schematically showing the striking pin 1, the pin folder portion 2 and the pin folder shaft 3 shown in FIG. 1, and a perspective view schematically showing the pin retainer 4 removed from the pin folder portion 2. is. 4 is a diagram schematically showing a cross section of the pin retainer 4 along line IV-IV shown in FIG.

As described above, the inner peripheral surface of the through hole 2h of the pin holder portion 2 and the outer peripheral surface of the striking pin 1 are separated from each other, and the pin retainer 4 according to the first embodiment is configured such that the pins are separated from each other. It is arranged so as to be in contact with the folder portion 2 and the outer peripheral surface of the striking pin 1 . More specifically, it is as follows. The pin stopper 4 of the first embodiment is an annular member having a predetermined thickness as shown in FIG. The inner peripheral surface of the pin stopper 4 is in close contact with the outer peripheral surface of the striking pin 1. - 特許庁In addition, a notch 4c is formed in the outer peripheral surface of the pin stopper 4 in the circumferential direction. The pin retainer 4 is fixed to the pin folder portion 2 by fitting the edge of the through hole 2h of the pin folder portion 2 into the notch 4c. In this manner, the pin retainer 4 is arranged between the inner peripheral surface of the through hole 2h and the outer peripheral surface of the striking pin 1. As shown in FIG. By arranging the pin stopper 4 in this manner, the striking pin 1 is indirectly held in the pin folder portion 2 via the pin stopper 4 by the frictional force of the pin stopper 4 .

In addition, at least a portion of the pin stopper 4 that is in contact with the outer peripheral surface of the striking pin 1 can vibrate together with the vibration of the striking pin 1 . For example, the pin retainer 4 is fixed to the pin folder portion 2 on the outer peripheral surface side, while the inner peripheral surface side is deformable or expandable along the arc direction of the arc portion 1c. Therefore, the striking pin 1 can vibrate relative to the pin holder portion 2 along the arc direction of the arc portion 1c.

It is preferable that the pin retainer 4 is made of a material that is softer than the pin folder portion 2 and the striking pin 1, yet less likely to interfere with the ultrasonic vibration of the striking pin 1, and resistant to repeated vibration. A specific example of a preferable material for the pin removal prevention tool 4 is a viscoelastic material such as rubber or silicon. Since the pin stopper 4 is composed of a viscoelastic body that can be easily deformed or stretched, the viscoelasticity of the pin stopper 4 is used to move the striking pin 1 along the arc portion 1c as described above. It becomes easy to move (vibrate) in the direction. Further, the pin stopper 4 prevents the striking pin 1 from falling out of the pin folder portion 2 and prevents the striking pin 1 from rotating in a plane perpendicular to the vibration direction. Furthermore, since contact between the pin holder portion 2 and the striking pin 1 is suppressed by the pin stopper 4, damage to the striking pin 1 is suppressed.

(pin folder shaft)
5 is a perspective view schematically showing the pin folder portion 2 and the pin folder shaft 3 shown in FIG. 1. FIG. The pin folder shaft 3 is a rod-shaped member such as a columnar member. Further, the pin holder shaft 3 is arranged closer to the arc center of the arc portion 1c of the striking pin 1 than the striking pin 1, as shown in FIG. More specifically, the pin folder shaft 3 is arranged so that the central axis is perpendicular to a plane that is parallel to the vibration direction of the waveguide 6 and includes the one end 1a and the other end 1b of the striking pin 1. . It is preferable that the central axis of the pin holder shaft 3 overlaps with the arc center of the arc portion 1c of the striking pin 1 .

Further, the pin folder shaft 3 is arranged so that a portion of the side surface (outer peripheral surface) of the pin folder shaft 3 contacts the one end portion 2 a of the pin folder portion 2 . More specifically, the pin folder shaft 3 is arranged so as to be in contact with the inside of the bent portions of the plate-like bodies that are bent into a substantially V shape and constitute the two pin folder portions 2 as described above. That is, the two plate-like members forming the pin folder portion 2 are wound around the pin folder shaft 3 . Accordingly, one end portion 2 a of each pin folder portion 2 is rotatable along the outer peripheral surface of the pin folder shaft 3 . Thus, one end portion 2a of each pin folder portion 2 contacts the pin folder shaft 3. As shown in FIG. Therefore, the pin folder shaft 3 restricts the movement of the pin folder portion 2, specifically, the movement of the pin folder portion 2 from the pin folder shaft 3 side to the striking pin 1 side. Moreover, since the pin folder portion 2 and the pin folder shaft 3 are not adhered to each other as described above, the stress concentration at the contact portion between the pin folder portion 2 and the pin folder shaft 3 is alleviated. As a result, the occurrence of fatigue cracks due to ultrasonic impact is suppressed.

The pin folder shaft 3 preferably has strength, toughness and durability. Therefore, as a material for forming the pin folder shaft 3, for example, high-strength spring steel, quenched and optionally tempered tool steel, or the like is preferable.

(Pin folder shaft restraint)
The pin folder shaft retainer 5 appears in FIGS. 1 and 2. FIG. The pin folder shaft retainer 5 includes two plate-like portions 5a and 5b as shown in FIG. One end of the pin folder shaft 3 is fixed to one plate-like portion 5a, and the other end of the pin folder shaft 3 is fixed to the other plate-like portion 5b. Also, the two plate-like portions 5a and 5b are arranged so as to sandwich the waveguide 6 therebetween. The front ends of the respective plate-like portions 5a and 5b protrude forward beyond the tip surface 6a of the waveguide 6. As shown in FIG. A portion of the plate-shaped portions 5a and 5b projecting forward in this manner serves as a lateral deflection guide 7 that sandwiches the pin folder portion 2. As shown in FIG. By forming the lateral deflection guide 7 , displacement of the pin folder portion 2 and the striking pin 1 in the plane perpendicular to the vibration direction of the waveguide 6 is suppressed.

[Operation of peening processor]
Next, operation of the peening processing apparatus 10 according to the first embodiment described above will be described.

When the waveguide 6 vibrates (ultrasonic vibration) back and forth (left and right in FIG. 1) as indicated by a double arrow in FIG. Then, the striking pin 1 vibrates (ultrasonic vibration) in an arc around the pin holder shaft 3 . When the striking pin 1 vibrates in an arc in this manner, the striking pin 1 is held by the pin stopper 4 so as to be able to vibrate. As the striking pin 1 vibrates in an arc as described above, the direction of vibration is converted by the striking pin 1 into the circumferential direction. For this reason, as indicated by the arrow in FIG. 1, an ultrasonic impact in a direction different from the direction of ultrasonic vibration of the waveguide 6 is applied by the striking pin 1 to the processing portion 9 of the material 8 to be processed.

As described above, according to the peening apparatus 10 of the first embodiment, the striking pin 1, whose one end portion 1a is in contact with the waveguide 6 to propagate mechanical vibration, has the arcuate portion 1c. Also, the striking pin 1 is held by the pin holding mechanism 11 so as to be able to vibrate along the arc direction of the arc portion 1c. Therefore, the vibration applied to the one end portion 1a of the striking pin 1 is changed in an arc direction (circumferential direction) different from the direction of the mechanical vibration generated by the mechanical vibration generator. Then, the workpiece 8 is struck by the other end portion 1b of the striking pin 1. As shown in FIG. As described above, the peening treatment apparatus 10 of the first embodiment makes the direction of the impact applied to the material to be treated 8 different from the direction of the mechanical vibration generated by the mechanical vibration generator according to the shape of the impact pin 1. can be changed to Therefore, in a small space, the direction of impact applied to the material to be treated 8 can be changed to a direction different from the direction of the mechanical vibration generated by the mechanical vibration generator. Therefore, the peening processing apparatus 10 of the first embodiment can easily perform angle processing in a narrow space, which could not be performed in the prior art.

In addition, since the tip surface (contact surface) 6a of the waveguide 6 is inclined with respect to the plane perpendicular to the vibration direction of the mechanical vibration, the direction of the impact applied to the material 8 to be processed is generated by the mechanical vibration generator. It becomes easy to change the direction of the mechanical vibration to the direction different from the direction of vibration.

Also, the striking pin 1 is held by the pin folder portion 2 whose movement is restricted as described above so as to be able to vibrate along the arc direction. Therefore, the striking pin 1 can vibrate smoothly along the arc direction while the positional deviation is suppressed.

Furthermore, the two (plurality) pin folder portions 2 are integrated at one end portion 2 a of the pin folder portion 2 . Therefore, by winding one end portion 2a of the pin folder portion 2 around the pin folder shaft 3, the two (plurality) of pin folder portions 2 are easily brought into contact with the pin folder shaft 3, and the pin folder portion 2 is Movement can be easily restricted.
In addition, one end portion 2a of the two (plural) pin folder portions 2 is not adhered to the pin folder shaft 3 and is rotatable along the outer peripheral surface of the pin folder shaft 3. and the pin folder shaft 3, stress concentration is relieved. As a result, the occurrence of fatigue cracks is suppressed.

2. Second Embodiment FIG. 6 is a side view schematically showing part of a peening apparatus according to a second embodiment of the present invention. In FIG. 6, parts common to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and descriptions thereof are omitted or simplified.

In the peening apparatus 10 according to the second embodiment, the inclination of the tip surface 6a of the waveguide 6 is different from the inclination of the tip surface 6a of the waveguide 6 of the first embodiment. As shown in FIG. 6, the tip end face 6a of the waveguide 6 according to the second embodiment is positioned perpendicular to the vibration direction of the ultrasonic vibration transmitted to the waveguide 6 from the mechanical vibration generator. 1 is inclined in the opposite direction to the first embodiment shown in FIG. That is, as shown in FIG. 6, the tip surface 6a of the waveguide 6 according to the second embodiment is parallel to the vibrating direction of the waveguide 6 and in a cross section including the one end 1a and the other end 1b of the striking pin 1. , the end portion on the side farther than the end portion on the side closer to the portion with which the one end portion 1a of the striking pin 1 contacts is slanted so as to face forward. The orientation of the tip surface 6a of the waveguide 6 may be appropriately determined from the relationship between the shape of the processing portion 9 of the material 8 to be treated and the shape of the tip of the peening apparatus 10. FIG.

3. Modifications In the above-described embodiment, the tip surface 6a of the waveguide 6 is inclined with respect to the plane S perpendicular to the vibration direction of the ultrasonic vibration transmitted from the mechanical vibration generator to the waveguide 6. FIG. However, the invention is not limited to these forms. The tip surface 6a of the waveguide 6 may be perpendicular to the vibration direction of the ultrasonic vibration transmitted to the waveguide 6 from the mechanical vibration generator.

Moreover, in the above-described embodiment, the example in which the cross section perpendicular to the vibration direction of the striking pin 1 is circular is given. However, the invention is not limited to this form. When the direction of the reaction force generated when the striking pin 1 strikes the material 8 to be processed deviates, the striking pin 1 may be subjected to force in a rotating direction within a plane perpendicular to the vibration direction. From the viewpoint of suppressing such rotation of the striking pin 1, the cross section of the striking pin 1 perpendicular to the vibration direction may be non-circular. Restricting the rotation of the striking pin 1 makes it easier for the striking pin 1 to strike the workpiece 8 in a predetermined direction. Variations in the cross-sectional shape of the striking pin 1 will be described below.

7A and 7B are diagrams showing variations of the striking pin 1. FIG. FIG. 7(a) is a cross-sectional view of the striking pin 1 having an elliptical cross-section perpendicular to the vibration direction. FIG. 7(b) is a cross-sectional view of the striking pin 1 having a square cross section perpendicular to the vibration direction. FIG. 7(c) is a cross-sectional view of the striking pin 1 having a triangular cross-section perpendicular to the vibration direction. In these cases, the shape of the inner peripheral surface of the through hole 2h or the shape of the inner peripheral surface of the pin stopper 4 is preferably elliptical, quadrangular, or triangular in accordance with the outer shape of the striking pin 1. This is because it becomes easier to restrict the rotation of the striking pin 1 . However, the shape of the inner peripheral surface of the through hole 2h or the shape of the inner peripheral surface of the pin stopper 4 is in contact with the striking pin 1, as indicated by the two-dot chain lines in FIGS. 7(a) to 7(c). It may have a circular shape, or may have a polygonal shape that is in contact with the striking pin 1 and has a different outer shape from the striking pin 1 as indicated by the dashed line. From the viewpoint of workability, etc., the cross-sectional shape of the striking pin 1 is preferably a simple shape such as an ellipse, a square, or a triangle.
When the striking pin 1 has a non-circular cross section as described above, the thickness of the striking pin 1 is defined as the thickness of the largest diameter portion of the cross section perpendicular to the vibration direction of the striking pin 1 .

Moreover, in the said embodiment, the example in which the pin folder part 2 was provided two sheets was given. However, the invention is not limited to this form. For example, when the cross section of the striking pin 1 perpendicular to the vibration direction is circular, three or more plate-like pin folder portions 2 may be provided from the viewpoint of easily suppressing the rotation of the striking pin 1 as described above. good. However, the rotation of the striking pin 1 can be suppressed even with two plate-like pin folder portions 2 by adjusting the rigidity of the pin folder portion 2 or the like. As the number of pin folder portions 2 increases, the impact of ultrasonic waves on the striking pin 1 may become more difficult.

In order to suppress the rotation of the striking pin 1, it is preferable that the rigidity of the pin folder portion 2 against deformation of the striking pin 1 in the vibrating direction is high. For example, the rigidity of the pin folder portion 2 itself may be increased. Further, in the above-described embodiment, an example in which the other end portion 1b of each pin folder portion 2 is a free end has been described. By doing so, the rigidity of the pin folder portion 2 may be enhanced. Further, in order to suppress the rotation of the striking pin 1, it is also effective to reduce the clearance between the inner peripheral surface of the through hole 2h of the pin folder portion 2 and the striking pin 1.

Moreover, although the said embodiment gave and demonstrated the example which the one end part 2a of each pin folder part 2 is integrated, this invention is not limited to the said form. Each pin folder part 2 may be separated from each other. In this case, for example, one end portion 2a of each pin folder portion 2 may be fixed to the pin folder shaft 3, and the pin folder shaft 3 may rotate together with each pin folder portion 2 around the axis. In this case, means for fixing one end portion 2a of the pin folder portion 2 to the pin folder shaft 3 is not particularly limited. For example, one end portion 2a of the pin folder portion 2 may be fitted to the side surface of the pin folder shaft 3 or may be adhered.

Further, in the above embodiment, one end portion 2a of the pin folder portion 2 is wound around the pin folder shaft 3 in order to restrict the movement of the pin folder portion 2. As shown in FIG. However, the mode of restricting the movement of the pin folder portion 2 is not limited to this. FIGS. 8(a) and 8(b) are diagrams showing modifications of the pin folder section 2, respectively. In the example shown in FIG. 8(a), one end portion 2a of the pin folder portion 2 is fastened to the pin folder shaft 3 by a binding member 20 such as a wire or rubber band. Further, in the example shown in FIG. 8B, an annular portion 21 is formed at one end portion 2a of the pin folder portion 2, and by passing the pin folder shaft 3 through this annular portion 21, the one end portion of the pin folder portion 2 is opened. The portion 2a is fastened to the pin folder shaft 3. Even in these forms, the one end portion 2a of the pin folder portion 2 is rotatable along the outer peripheral surface of the pin folder shaft 3, and the separation of the pin folder portion 2 from the pin folder shaft 3 is suppressed. .

In the above-described embodiment, the pin stopper 4 is sandwiched between the striking pin 1 and the pin holder 2, but the pin stopper 4 is not limited to this form. FIG. 9 is a sectional view showing a modification of the pin stopper 4. As shown in FIG. The pin retainer 4 shown in FIG. 9 is composed of two annular members 4a. Each annular member 4a has its inner peripheral surface fixed to the outer peripheral surface of the striking pin 1 in close contact therewith. Further, the striking pin 1 is fixed to the pin folder portion 2 via the pin stopper 4 by sandwiching the edge of the through hole 2h of the pin folder portion 2 between the two annular members 4a. In this case, it is preferable that a minute gap G is formed between the inner peripheral surface of the through hole 2h and the outer peripheral surface of the striking pin 1. As shown in FIG.

Further, in the above-described embodiment, an example in which the pin stopper 4 is provided is given, but the pin stopper 4 is not an essential component. If the pin stopper 4 is not provided, the striking pin 1 may be inserted through the through hole 2h so that the inner peripheral surface of the through hole 2h and the outer peripheral surface of the striking pin 1 are in contact with each other. At this time, it is preferable that the inner peripheral surface of the through hole 2h is made of a soft material so that damage to the striking pin 1 is suppressed.

1 Impact pin 1a One end 1b Other end 1c Arc portion 2 Pin folder portion 2a One end 2b Other end 3 Pin folder shaft 4 Pin retainer 5 Pin folder shaft holder 6 Wave guide 6a Tip surface (contact surface)
7 Horizontal vibration guide 8 Material to be treated 9 Processing unit 10 Peening device 11 Pin holding mechanism S Surface perpendicular to the vibration direction of mechanical vibration

Claims (6)

a waveguide for propagating mechanical vibration generated by a mechanical vibration generator;
a striking pin having an arc-shaped portion, one end of which contacts the waveguide to propagate the mechanical vibration, and the other end of which strikes the material to be treated;
a pin holding mechanism that holds the striking pin so as to vibrate;
A peening treatment device comprising: 2. The peening apparatus according to claim 1, wherein a contact surface of said waveguide with which said one end of said striking pin contacts is inclined with respect to a plane perpendicular to the vibration direction of said mechanical vibration. The pin holding mechanism includes a plurality of pin folder portions having through holes through which the striking pins are inserted, and a pin folder shaft that contacts one end of each of the pin folder portions to limit movement of the pin folder portions. has
3. The peening apparatus according to claim 1, wherein the pin holder shaft is arranged closer to the center of the arc than the striking pin. A pin retainer is further provided in which the inner peripheral surface of the through hole of the pin folder portion and the outer peripheral surface of the striking pin are separated from each other, and the pin holder portion and the outer peripheral surface of the striking pin are in contact with each other,
4. The peening apparatus according to claim 3, wherein at least a portion of said pin stopper that contacts the outer peripheral surface of said striking pin can vibrate together with vibration of said striking pin. 5. The peening apparatus according to claim 3, wherein the plurality of pin folder portions are integrated at the one end portion of the pin folder portion. 6. The peening apparatus according to claim 5, wherein said one end of said plurality of pin folder portions is rotatable along the outer peripheral surface of said pin folder shaft.

Images