JP2008290229A - Device and method for chamfering metallic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering device capable of chamfering the corner portions of a metallic material or a metallic structural member under economical, efficient, and satisfactory working environments. <P>SOLUTION: The chamfering device for a metallic material comprises a chamfering oscillation terminal extending at the leading end portion of an oscillating device in the oscillating direction, having a bottom part with a cross section of a radius of curvature R normal to that extending direction, and having a groove opened toward leading end side, and that oscillating device for vibrating the oscillation terminal in the axial direction thereof at a frequency of 10 to 50 KHz and a power of 0.1 to 4 KW. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a chamfering device and a chamfering method for a corner portion of a metal material or a metal structural member, and relates to an apparatus and a method for chamfering by impact vibration.

Metal materials and metal structural members such as steel plates and steel members used as bridges, steel frames or ship building aggregates are often subjected to various types of coating before or after assembly, depending on the purpose. Even in the case of assembling the hull, it is becoming a situation that the steel member is required to be coated with at least rust prevention.
On the other hand, since the edge of a steel plate or steel member is a sharp corner (corner), the coating film is easily peeled off from the corner when coating is applied. In order to prevent the peeling of the coating film, the corner portion is chamfered to make the sharp corner portion a curved surface having a smooth curvature. For this chamfering, a method of grinding with a grinder, a method of cutting with a cutter with a carbide tip having a curved cutting part, and the like are known.

Further, as a method for treating the edge of a metal material, Patent Literature 1 proposes a turn-up device for taking up the remaining turn after punching or shearing a metal thin plate. The apparatus has a tool having a jaw piece formed to receive the edge of the sheet metal and a peening tool that acts as a hammer against the edge of the sheet metal. This turn-up device is intended for a thin metal plate, and as shown in FIGS. 1 and 3 of Patent Document 1, the jaw pieces are formed so as to simultaneously contact the front and back surfaces of the edge of the thin metal plate. That is, it is configured to sandwich the front and back corners at the edge. Also, the peening tool that acts as a hammer as a vibration device is inserted into the bottom of the cylindrical body in a plurality of concave recesses provided in the bottom surface of the hammer that is rotatably inserted around the shaft in the cylindrical body. The inserted hard ball generates and vibrates in the axial direction by moving in and out with the rotation of the hammer in the axial direction by the electric motor, and at the same time hits the front and back surfaces in the thickness direction of the metal thin plate with the jaw pieces by the vibration, It is something that takes a beard.
Further, in Patent Document 2, a set of two V-shaped rolls facing each other in the horizontal direction across the transfer path of the metal plate material is arranged in parallel in the transfer direction, and each roll set has a roll pressurizing mechanism. And an edge roll processing apparatus in which the angles of the V-shaped rolls are different from each other, and while transferring the metal plate, the V-shaped rolls are pressed against both end surfaces of the metal plate, and the upper and lower corners have different angles. An edge roll processing method that performs compression processing in stages is disclosed.
Patent Document 3 discloses a vibration source that generates a low-frequency vertical vibration, a forming tool, a transmission unit that transmits the low-frequency vertical vibration to the molding tool, and a transmission unit that is reciprocally held by an elastic member. In addition, there is disclosed a vibration molding apparatus including a mold including an upper mold provided with a molding tool and a lower mold for positioning and fixing a workpiece. The workpiece fixed to the lower mold is subjected to plastic working such as bending or drawing by low frequency vertical vibration.
By the way, in recent years, by applying impact treatment such as ultrasonic impact treatment and hammer peening treatment to the weld toe of metal material, stress concentration and residual stress on this part are simultaneously reduced, and the fatigue strength of the welded joint is improved. For example, Patent Document 4 proposes a method for improving the fatigue life of a metal material by applying ultrasonic impact treatment to a location where fatigue of the metal material is a problem. It is disclosed that, by applying the treatment, the weld toe portion is deformed to have a predetermined curvature, and the stress concentration is alleviated.

JP 49-59768 A JP-A-4-210824 Japanese Utility Model Publication No. 62-77616 Japanese Patent Laid-Open No. 2003-113418

However, in the grinding method using a grinder, the curvature radius and chamfering width of the surface to be chamfered are adjusted by the skill of the operator, so it is difficult to keep them constant, and due to the generation of grinding debris and dust accompanying the work The working environment is harsh. In addition, the method of cutting with a cutter requires a cost for exchanging chips and processing the generated cutting waste in order to maintain a constant machinability, and it can be said that the working environment such as generation of cutting dust is not necessarily good. There is no problem. Moreover, in the apparatus of patent document 1, since it is formed so that a jaw piece may contact | abut simultaneously on the corner part of the front and back of the edge part of a metal thin plate, ie, it is comprised so that the corner part of front and back may be pinched | interposed. The respective corner portions on the front and back sides of the thin metal plate can only come into contact with the inclined surface of the jaw piece, and therefore, the respective corner portions on the front and back surfaces cannot be chamfered to a surface having a gentle curvature. Furthermore, there is a problem that it cannot be applied when one side of the metal thin plate is welded or connected to another member and the plate thickness direction cannot be sandwiched between jaw pieces. In addition, the vibration device rotates the hammer shaft with an electric motor, and along with this rotation, the steel ball enters and exits into the recess provided at the bottom of the hammer shaft, so that vibration in the axial direction can be obtained. Naturally, there is a limit, and it is difficult to remove the curl with high power and vibration at a high frequency.
Further, the apparatus of Patent Document 2 is intended for a metal plate material slit to a predetermined width, and it is necessary to provide a metal plate material conveying device and roll pairs with different V-shaped angles in multiple stages in the metal plate conveying direction. Yes, equipment costs will be large. In addition, there is a problem that it cannot be applied to a metal plate or structure having a complicated shape.
Further, the molding apparatus described in Patent Document 3 fixes a small part such as an electronic component or a mechanical part to the lower mold, and then bends or squeezes between the upper mold and the lower mold due to vibration by the upper mold. However, the metal member or the structural member is not chamfered.
Moreover, although the said patent document 4 proposes improving the shape of a toe part of a welding part, it does not suggest at all about chamfering the corner part of a metal member.
This invention solves such a problem, and makes it a subject to provide the chamfering apparatus which can perform the corner part of a metal material or a metal structure member in an economical, efficient, and favorable working environment.

The present invention has been made to solve the above-described problems, and chamfering is performed by hitting a corner portion of a metal material or a metal structure member with a vibration terminal having a groove of a predetermined shape at a tip portion. The gist of this is as follows.
(1) At the tip of the vibration device in the vibration direction, it extends in a direction orthogonal to the vibration direction, and the cross section in the direction orthogonal to the extension direction has a bottom portion with a radius of curvature R, and has a groove opened on the tip side. A metal material chamfering apparatus, comprising: a chamfering vibration terminal; and a vibration device that vibrates the vibration terminal in the axial direction at a frequency of 10 Hz to 50 kHz and with a power of 0.1 to 4 kW.
(2) The metal material chamfering apparatus according to (1), wherein an opening angle of the groove of the chamfering vibration terminal is 90 ° ± 10 °.
(3) The metal material chamfering apparatus according to (1) or (2), wherein a radius of curvature R of a bottom portion of the groove of the chamfering vibration terminal is 0.5 to 5 mm.
(4) The chamfering device for a metal material according to any one of (1) to (3), wherein the chamfering vibration terminal is a rod-shaped body.
(5) The chamfering vibration terminal is a disk-like body rotatably supported by a pin holder of the vibration device, and the groove is formed on the outer periphery of the disk-like vibration terminal and in the cross section in the diameter direction of the disk. The metal material chamfering device according to any one of (1) to (3), wherein the chamfering device is formed so as to be opened in a radial direction.
(6) Using the chamfering device according to any one of (1) to (5), the vibration terminal is vibrated at a frequency of 10 Hz to 50 kHz, and a corner portion of the metal material is formed at a power of 0.1 to 4 kW. A method for chamfering a metal material, characterized by chamfering.

According to the present invention, a corner portion of a metal material or a metal structure member can be chamfered without using a tool with high wear such as a grinder disk or a cutting tip, and the grinder disk or cutting tip can be replaced, ground, or cut. There is no need for waste disposal. Therefore, it can be performed economically and efficiently. In addition, it is possible to suppress the deterioration of the work environment due to the generation of dust and debris accompanying grinding and cutting, and to make the work environment more suitable.
Further, according to the chamfering apparatus of the present invention, the chamfered surface of the corner is smoothly formed by the bottom portion having the curvature of the vibration terminal, and is difficult to peel off when painted or the like. Further, in the chamfering according to the method of the present invention, the metal crystal structure of the surface portion of the corner portion that has been chamfered is refined, so that fatigue cracks are generated from the corner portion compared to the corner portion chamfered by conventional cutting. Etc. can also be reduced.
Further, the metal material and metal structure member to be chamfered are not limited to steel, but can be applied to stainless steel aluminum alloy, titanium alloy, magnesium alloy, and the like.

  FIG. 1 is a schematic cross-sectional view showing an outline of the configuration of one example of the chamfering apparatus of the present invention. In FIG. 1, a chamfering device 1 basically includes a vibration device 2 and a vibration terminal 3 for chamfering (hereinafter also referred to as a chamfering pin) attached to the tip in the vibration direction. In this example, the vibration device 2 includes an oscillating unit 4 having an oscillating body 4 composed of a magnetostrictive core or a piezo element, an oscillating coil 5 wound around the oscillating body, and a front side of the oscillating body (hereinafter referred to as a vibration direction of the oscillating body). 1 shows an example of an ultrasonic vibration device having a waveguide 7 connected to the front, a chamfering vibration terminal, that is, a side to which a chamfering pin is attached is a front or a front end side.

The oscillating portion 6 and the waveguide 7 are accommodated in a cylinder 8, and the waveguide 7 is held by the cylinder 8 via a spring 9. A pin holder 10 is provided at the tip of the waveguide 7 protruding forward from the cylindrical body, whereby the chamfered pin 3 is attached to the waveguide so as to vibrate. That is, the chamfering vibrator is attached to the tip side (front side) of the vibration direction of the vibration device.
A seal 11 is provided in a circumferential gap between the waveguide 7 and the cylinder 8, and a water supply port 14 and a drain 15 provided at the rear end of the cylinder 8 through the cooling water pipe 13 from the cooling device 12. Then, cooling water is supplied to and discharged from the cylinder to cool the vibration device 2. A chamfering handle 16 is attached to the rear end of the cylinder.
In addition to the ultrasonic vibration device as described above, a vibration device such as a pneumatic vibration device or an eccentric motor can be used as the vibration device.

  2A to 2D are views showing a shape of one form of the chamfering vibration terminal of the chamfering apparatus of the present invention, that is, the chamfering pin 3. In this figure, in the case of a cylindrical (rod-like) pin Is illustrated. (A) is a perspective view, (b) is a side view from the direction in which a groove extends, (c) is a side view from a direction orthogonal to (b), and (d) is a top view. A groove 20 is formed in the tip portion of the chamfer pin 3 so as to extend linearly in a direction orthogonal to the vibration direction and open in the tip side in a cross section orthogonal to the extending direction.

The groove 20 extends in a direction orthogonal to the vibration direction. However, in order to efficiently use the impact force for chamfering, the groove 20 is preferably provided so as to pass through the axial center C of the chamfering pin.
In addition, the groove 20 has a shape (V-shaped or concave shape) in which the shape of the cross section orthogonal to the extending direction is open toward the tip side at the opening angle α, upward in the drawing.

As shown in FIG. 6, the side surface 21 of the groove 20 serves as a kind of guide for both side surfaces forming the corner portion 27 of the processing target member 19 during chamfering, and this opening angle α Is preferably adjusted according to the angle of the corner 27 of the member to be processed.
Since the angle of the corner portion formed of a normal metal member is substantially a right angle, the opening angle α is preferably 90 °. However, since the angle of the corner portion to be formed varies depending on the cutting or cutting method of the metal member, 90 ° to 90 ° ± 10 ° is more preferable. When the angle is less than 80 ° or exceeds 100 °, it becomes difficult to make the width Wc of the chamfered surface uniform as described later.
In addition, when the angle of the corner part of a metal member is formed with an acute angle or an obtuse angle, it can chamfer similarly by setting this opening angle (alpha) to the angle corresponding to the acute angle or an obtuse angle.

  FIG. 3 shows the opening angle α of the groove 20. This opening angle is symmetric with respect to the surface in the groove extending direction, that is, as shown in FIG. 3, with respect to a line passing through the central axis. The angle is preferably α / 2 to the left and right. If the opening angle is asymmetric with respect to the surface in the groove extending direction, it becomes difficult to make the width Wc of the chamfered surface uniform. The chamfer width (Wc) is a distance between both end portions of the chamfered surface in a cross section orthogonal to the extending direction of the corner portion as shown in FIG.

As shown in FIG. 2B, the bottom 22 of the cross section orthogonal to the direction in which the groove 20 extends has a radius of curvature R. This curvature radius R is substantially copied to the cross-sectional shape of the corner portion of the processing target member 19 when chamfering. This radius of curvature R can be selected as desired for the chamfered shape of the corner portion of the material to be processed.
If the radius of curvature R is too small, the chamfered width Wc of the chamfered corner portion becomes narrow and sharp, and the chamfering effect is reduced. On the other hand, if the radius of curvature R is too large, the amount of metal to be flowed by the chamfering operation increases. A large step (a difference in thickness between the chamfered corner (width Wc) and the thickness of the portion other than the corner) in the cross section perpendicular to the direction in which the corner extends is formed around the corner chamfered by the finished metal. It is not preferable because the processing time becomes long.
From this point of view, if the radius of curvature is less than 0.5 mm, the chamfering effect is not sufficient, and if it exceeds 5 mm, a large step is likely to be formed in the vicinity of the corner, so the radius of curvature is 0.5 to 5 mm. It is preferable to set the degree. More preferably, it is 1-3 mm.

4 (a) and 4 (b) are perspective views showing other embodiments of the chamfering vibration terminal used in the chamfering apparatus of the present invention, that is, a chamfering pin.
4 (a) and 4 (b) are rod-shaped chamfered pins, (a) is at the tip of the vibration direction (axial direction) of the prismatic rod, and (b) is the vibration direction (axial direction) of the cylindrical rod. A square portion 23 is provided at the tip portion, and a linear groove 20 is formed at the tip of the square portion. In the case of these chamfered pins, the strength of the groove can be improved as compared with the case of the cylindrical bar in FIG.

  The length of the groove 20 (in the case of a cylindrical rod, its diameter d (see FIG. 3 (d)), and when a square portion is provided at the tip of the prismatic rod or cylindrical rod, the length of the side of the prismatic rod or square portion. The length l (substantially corresponding to FIGS. 4A and 4B) is not particularly defined. If the groove is long, a long range of the corner can be chamfered at a time, but the striking energy applied per corner length is smaller than the constant striking energy given by the vibration device. It takes time to get the shape. However, if the length is longer, the contact of the chamfer pin with the corner of the valley portion becomes stable, so that it becomes easy to obtain a uniform chamfer width Wc. On the other hand, if the groove length is shortened, the impact energy per unit length is increased, so that a chamfered shape having a predetermined radius of curvature can be obtained in a short time, but the predetermined length is chamfered. The time required for this is considered to be substantially the same as in the above case. If the length is short, contact with the corner portion is likely to be unstable, and it becomes difficult to obtain a uniform chamfer width. The selection can be made in consideration of the output of the vibration device, the required radius of curvature of the corner, the size of the chamfer pin, and the like. Preferably, it is 3-30 mm.

  The depth t of the groove 20 may be determined in consideration of the chamfering width (Wc). However, the chamfering width is also affected by the size of the radius of curvature R of the chamfering pin or the opening angle α. Therefore, from the viewpoint of the strength of the chamfered pin, the shape of the cross section perpendicular to the axis of the tip of the chamfered pin (cross section perpendicular to the vibration direction) (the diameter d of the cylindrical rod, the width W of the prismatic rod) is also taken into consideration. It may be determined in consideration of appropriate circumstances. Further, the axial length h of the chamfered pin is not particularly limited, and may be determined in consideration of the length of the holder, the strength of the pin, workability, and the like.

FIG. 5 is a schematic cross-sectional view showing another example of the chamfered pin 3. In this example, the chamfer pin is a disk-like body, and has a groove 20 having a diametrical cross-sectional shape opened along the outer periphery of the disk (on the tip side) along the outer periphery of the disk 24. . That is, an annular groove opened in the outer diameter direction is formed. The disk body 24 is supported rotatably by passing a support shaft 26 through a shaft hole 25 provided at the center of the disk body and attaching the support shaft 26 to the pin holder 10.
In this embodiment, the chamfering pin can be rotated while vibrating in the vibration direction. Therefore, the chamfering pin is moved along the corner portion of the material to be processed while being vibrated to move the chamfering pin extremely efficiently. Can proceed. In this case, the shape of the groove (groove opening angle, radius of curvature of the bottom of the groove, etc.) may be set in the same manner as in the case of the rod-shaped pin described above.

The material of the chamfering pin is not particularly limited, but it is necessary that the chamfering pin has hardness (strength) in order to hit at least the corner portion of the processing target material and deform it. For example, carbon steel for tools such as SKH material having an HRC hardness of 62 or more, or super hard material such as WC (tungsten carbide) is preferable.
In addition, since the surface of the groove of the chamfered pin is greatly worn by friction with the corner portion, it is preferable to perform surface treatment such as surface coating treatment or surface hardening treatment.

FIG. 6 is a perspective view showing a situation where the corner portion is chamfered using the chamfering apparatus of the present invention. The operation will be described with reference to FIGS.
In FIG. 1, the oscillator 4 is vibrated by the current supplied from the power source / control unit 17 to the oscillation coil 5 of the vibration device 2 via the cable 18, and the vibration in the axial direction (vibration direction, see FIG. 1) is guided. It is conveyed to the body. This vibration is transmitted to the tip of the waveguide, and the chamfer pin 3 attached to the tip vibrates in the axial direction (vibration direction of the vibration device).

  Since the groove 20 is formed in the chamfered pin 3 as described above, the groove of the chamfered pin 3 is formed in the corner portion 27 of the metal member 19 to be processed as shown in FIG. It is made to contact | abut so that it may become the same as the longitudinal direction of this, and it moves along the longitudinal direction of the corner part 27, vibrating. The chamfering pin strikes the corner portion 27 by the vibration, and the chamfering is performed by causing the metal in this portion to flow laterally.

  Since the bottom portion of the groove of the chamfer pin has a predetermined radius of curvature, the corner portion is chamfered by a corner portion 28 having a radius of curvature substantially following this radius of curvature. Further, both side surfaces of the groove are in contact with both side surfaces of the corner portion of the material to be processed, the center of the bottom portion of the groove is guided substantially opposite to the top portion of the corner, and the opening angle is in the direction in which the groove extends. Since these are symmetrical with respect to the surface, they are chamfered with a substantially uniform width along the corner portion.

  When chamfering is performed using the chamfering apparatus of the present invention as described above, the chamfering vibration terminal 3 is vibrated at a frequency of 10 Hz to 50 kHz by the vibration device 2 and applied at a power of 0.01 to 4 kW. It is preferable. That is, by vibrating at a frequency of 10 Hz to 50 kHz and chamfering by vibration hammering at a power of 0.01 to 4 kW, the metal in the corner portion is plastically flowed and the corner portion is chamfered at the same time as the corner portion. Since the surface generates heat during processing and repeatedly chamfers the surface in a heat-insulating state where the heat generated does not dissipate, the same effect as in hot forging is exerted on the corner, resulting in a refined crystal structure near the corner.

The reason why the vibration frequency of the chamfering vibration terminal 3 is 10 Hz or more is that if it is less than 10 Hz, a heat insulating effect cannot be obtained when chamfering by striking, and the frequency of 50 kHz or less can be applied industrially. This is because the frequency of the sound wave is generally 50 kHz or less.
Further, the reason why the power of the vibration terminal 3 is 0.01 kW or more is that if it is less than 0.01 kW, it takes too much time for chamfering, and the reason that it is 4 kW or less is that the chamfering process is performed with a power exceeding this. This is because the effect of shortening the time is saturated and the economy is lowered.

Hereinafter, the present invention will be described more specifically with reference to examples.
The chamfering apparatus shown in FIG. 1 is used to chamfer three corner portions of five types of steel member samples 1 to 5 having a substantially square cross section (the angle of the corner portion is about 90 °) and different strength levels from 400 to 600 MPa. did. At that time, the chamfering pin is made of SKH material of HRC62, is a cylindrical bar shape with a diameter of 4.8 mm and a length of 35 mm, the opening angle of the groove at the tip is 90 °, and the radius of curvature of the bottom of the groove is shown in FIG. What was changed into 1R-3R as shown in-(c) was used. The three corner portions of the steel member sample are chamfered by the chamfering pins shown in FIGS. 7A to 7C having different curvature radii at the bottom of the groove, and one corner portion is chamfered for comparison. The untreated part was left as it was in the previous corner. FIGS. 8A and 8B show the correspondence between the chamfering condition (the radius of curvature of the bottom of the used chamfering pin) and the processed corner part.
The frequency of the vibration device of the chamfering device was 27 kHz, and the power was 1.2 kW.
The curvature radius of the corner part after chamfering of the steel member sample and the corner part (untreated part) before chamfering were measured.
Table 1 shows the types of steel member samples, the radius of curvature of the corner portions before chamfering the steel member samples, and after chamfering with each chamfering pin.
Moreover, the cross-sectional macro structure photograph after chamfering of the steel member sample 2 is shown in FIG. 9, and the micro structure photographs are shown in FIGS. 10 (a), 10 (b), 11 (c), and 11 (d).
In the macro and micro photographs, the conditions of the chamfering treatment in the cross section of the steel member sample 2 (the curvature radius of the bottom of the groove of the used chamfering pin) and the correspondence between the untreated part of the corner and the corner part are shown in FIG. Corresponding to (b), FIG. 10 (a) is a microstructure photograph of an unprocessed part.

As can be seen from Table 1, the corner portion has an extremely large radius of curvature compared with that before chamfering (untreated portion), and is reliably chamfered. In the cross section of the chamfered corner portion, a curved surface having a curvature radius substantially following the curvature half R of the bottom portion of the groove of the chamfer pin is formed. Therefore, it is possible to obtain a corner portion chamfered to a desired curvature radius by appropriately selecting the curvature radius of the chamfer pin.
In FIG. 9, the chamfered chamfers each having a very smooth radius of curvature of approximately 1 mm (1R), 2 mm (2R), and 3 mm (3R), as is apparent when comparing the cross-sectional shape of the chamfered corner portion with the untreated portion. The formed corner portion is formed.
Further, as is clear from comparison between FIG. 10 (a), FIG. 10 (b), FIG. 11 (c), and (d), the corner portions chamfered by the chamfering device of the present invention are all surface layers. It can be seen that the crystal structure is refined. Such a chamfered portion having a smooth shape and a refined crystal structure cannot be obtained by a conventional chamfering method such as conventional grinding or cutting, and the chamfering device of the present invention provides excellent chamfering. Part can be obtained.

It is a cross-sectional schematic diagram which shows the outline | summary of the chamfering apparatus of this invention. It is a figure which shows an example of the rod-shaped chamfering vibration terminal of the chamfering apparatus of this invention, (a) is a perspective view, (b) is a side view from the direction where a groove extends, (c) is orthogonal to the direction where a groove extends. The side view from the direction to do, (d) is a top view. It is a figure which shows the opening angle (alpha) of the groove | channel of the rod-shaped chamfering vibration terminal of FIG. It is a perspective view which shows the other example of the rod-shaped chamfering vibration terminal of the chamfering apparatus of this invention. (A) is the example which provided the groove | channel in the front-end | tip part of a square bar, (b) was each provided in the front-end | tip part of the square-shaped part provided on the cylinder. It is a cross-sectional schematic diagram which shows the other form of the vibration terminal for chamfering of this invention. It is a schematic diagram which shows the condition which chamfers the corner part of a steel member using the chamfering apparatus of this invention. It is a side view from the extending direction of the groove | channel of the rod-shaped chamfering vibration terminal used in the Example, The curvature radius of the bottom part of a groove | channel is (1.0), (b) is 2.0 mm, (c). Indicates the case of 3.0 mm. It is a schematic diagram which shows the cross-sectional shape of the steel member sample before and behind chamfering in an Example, (a) is before chamfering, (b) shows the condition after chamfering. It is a macro structure photograph of the section of steel member sample 2 chamfered in an example. It is the microstructure picture of the section of the corner part of steel member sample 2 chamfered in an example, (a) before chamfering (untreated part), (b) for chamfering whose curvature radius of the bottom of a groove is 1.0 mm The case where it chamfers using a vibration terminal is shown, respectively. It is a microstructure picture of the section of the corner part of steel member sample 2 chamfered in an example, (a) is a curvature radius of the bottom of a groove 2.0mm, (b) is a curvature radius of the bottom of a groove 3.0mm. The case where it chamfered using the vibration terminal for chamfering is shown, respectively.

Explanation of symbols

1 Chamfering device 2 Vibrating device 3 Vibration terminal (Chamfering pin)
DESCRIPTION OF SYMBOLS 4 Oscillator 5 Oscillation coil 6 Oscillator 7 Oscillator 7 Tube 9 Spring 10 Pin holder 11 Seal 12 Cooling device 13 Cooling water pipe 14 Water supply port 15 Drainage port 16 Handle 17 Power supply / control device 18 Power supply cable 19 Material to be processed ( Metal parts)
20 groove 21 side surface of groove 22 bottom portion of groove 23 square portion of chamfering pin 24 disk 25 shaft hole 26 support shaft 27 corner portion 28 corner portion after chamfering C axis center of rod-shaped vibration terminal α groove opening angle h of rod-shaped pin Axial length l Side length of square pole pin t Groove depth w Side width of square pole pin Wc Chamfering width

Claims (6)

  For chamfering, which extends in the direction orthogonal to the vibration direction at the front end in the vibration direction of the vibration device, and has a cross-section in the direction orthogonal to the direction of extension having a bottom with a radius of curvature R and an open groove on the front end side. A metal material chamfering apparatus comprising: a vibration terminal; and a vibration device that vibrates the vibration terminal in the axial direction at a frequency of 10 Hz to 50 kHz and with a power of 0.1 to 4 kW.   2. The chamfering device for a metal material according to claim 1, wherein an opening angle of the groove of the chamfering vibration terminal is 90 ° ± 10 °.   The metal material chamfering apparatus according to claim 1, wherein a radius of curvature R of a bottom portion of the groove of the chamfering vibration terminal is 0.5 to 5 mm.   The said chamfering vibration terminal is a rod-shaped body, The chamfering apparatus of the metal material of any one of Claims 1-3 characterized by the above-mentioned.   The chamfering vibration terminal is a disk-like body rotatably supported by the pin holder of the vibration device, and the groove is formed on the outer periphery of the disk-shaped vibration terminal in the outer diameter direction of the disk in the diameter direction. The chamfering device for a metal material according to any one of claims 1 to 3, wherein the chamfering device is formed so as to be opened.   The chamfering device according to any one of claims 1 to 5, wherein the vibration terminal is vibrated at a frequency of 10 Hz to 50 kHz, and a corner portion of the metal material is chamfered at a power of 0.1 to 4 kW. Chamfering method of metal material.