JP2005014030A - Friction surfacing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction surfacing method in which a surfacing material can be fully effectively utilized. <P>SOLUTION: The friction surfacing method is employed to form a surfacing layer by relatively moving a surfacing material 20 while rotatably pressing and shifting the surfacing material 20 relative to the base material. In this method, a supplementary member 40 is provided to the side of a contact part between the base material 10 and the surfacing material 20, and the surfacing material 20 is relatively moved to the base material 10 while a flash projecting to the side of the surfacing material 20 is pressed to the supplementary member 40. Incidentally, the supplementary member 40 may be provided on the base material 10 side or on the surfacing material 20 side. Also, in the supplementary member 40, there may be prepared a relief section in a part corresponding to the contact part between the base material 10 and the surfacing material 20. Further, a run-out suppressing member may be installed for suppressing the run-out of the surfacing material 20 in contact with the side face thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a friction build-up method in which a build-up layer is formed by transferring a build-up material to a base material by rotating and pressing the build-up material relative to the base material. .
[0002]
[Prior art]
There are various methods for fixing the same or different material as the base material on the surface of the base material, such as welding and vapor deposition. Among them, there is a friction build-up method. Here, the friction build-up method is, for example, as shown in FIG. 5A, pressing the build-up material 20 on the surface of the base material 10 while rotating the build-up material 20 (shown by an arrow A), thereby Frictional heat is generated between the material 20 and the temperature of the build-up material 20 is raised to near the melting point by this frictional heat, and then the build-up material 20 is moved relative to the surface of the base material 10. Thus (shown arrow B), the material of the build-up material 20 is sheared and transferred to the base material 10 to form the build-up layer 30 on the surface of the base material 10 as shown in FIG. is there. According to such a friction build-up method, it is not necessary to melt the material of the build-up material 20 like welding or the like, and the material can be transferred to the base material 10 in the solid phase. The built-up layer 30 can be formed without altering the material. Moreover, the thick build-up layer 30 can be formed in a short time compared with surface treatments, such as vapor deposition.
[0003]
[Non-Patent Document 1]
Editor: Friction Welding Association, “Friction Welding”, Publisher: Corona Co., Ltd., May 10, 1979, first edition, first edition, page 23
[Problems to be solved by the invention]
However, in the conventional friction build-up method, as shown in FIG. 5 (c), a burr 21 protruding laterally is generated at the tip portion of the build-up material 20. And this burr | flash 21 becomes the surplus material which is not transferred to the base material 10. FIG. Therefore, in the conventional friction build-up method, the material of the build-up material 20 cannot be used sufficiently effectively.
[0005]
This invention is made | formed in view of the said actual condition, and makes it a subject to provide the friction build-up method which can fully utilize the material of build-up material sufficiently.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides:
“In the friction build-up method in which the build-up layer is formed by transferring the build-up material to the base material by rotating and moving the build-up material relative to the base material,
An attachment member is provided on the side of the contact portion between the base material and the build-up material, and the build-up material is applied to the base material while pressing the burr protruding to the side of the build-up material against the attachment member. Friction build-up method characterized by relative movement "
Is the main means.
[0007]
In order to move the build-up material relative to the base material while pressing the burr protruding to the side of the build-up material against the attachment member, even if the burr protruding to the side of the build-up material tries to grow, This burr sinks into the contact portion between the build-up material and the base material as a material for forming the build-up layer. Therefore, it is difficult to generate burrs that protrude unnecessarily large on the side of the build-up material, and much of the material of the build-up material moves to the base material to the extent that large burrs are less likely to be generated. Become. Therefore, according to the friction build-up method according to the present invention, the material of the build-up material can be used sufficiently effectively.
[0008]
In the above means,
“The attachment member is extended along the moving direction of the build-up material on the surface of the base material”
It is good.
[0009]
In this friction build-up method, the attachment member is arranged on the base material side, and the arrangement site of the attachment member is specified. According to this friction build-up method, on the surface of the base material, the burrs protruding to the side of the build-up material can be properly grown only by extending the attachment member along the moving direction of the build-up material. Since it can suppress, the friction build-up method which can fully utilize the material of the build-up material with a simple structure is realizable.
[0010]
In the above means,
“Friction build-up method, wherein the attachment member is provided on the build-up material side so as to move relative to the base material together with the build-up material”
It is good.
[0011]
In this friction build-up method, the attachment member is disposed on the build-up material side, and the placement site of the attachment member is specified. According to this friction build-up method, since the attachment member is moved relative to the base material together with the build-up material, it is not necessary to dispose the attachment member fixedly on the surface of the base material. Therefore, the degree of freedom when forming the build-up layer with various patterns on the surface of the base material can be improved, and a friction build-up method excellent in versatility can be realized.
[0012]
In the above means,
“The attachment member is provided with a relief portion at a portion corresponding to a contact portion between the base material and the build-up material”.
It is good.
[0013]
When the build-up material is rotated while pressing the burrs against the attachment member, radial stress is generated in the build-up material due to the reaction force of the burrs pressed against the attachment member, and the axis of the rotating build-up material is rotated. Swing, which can cause vibration in the build-up material. When the build-up material vibrates in this way, the material of the build-up material does not transfer well to the surface of the base material, and in the built-up layer formed on the surface of the base material, there is a portion that is not firmly fixed to the base material. May occur.
[0014]
Therefore, by providing a relief portion at a portion corresponding to the contact portion between the base material and the build-up material in the attachment member, the burr generated on the side of the build-up material can be temporarily stored in the escape portion of the attachment member. And Thereby, it becomes difficult to apply radial stress to the build-up material due to the reaction force of the burrs, and vibration of the build-up material is suppressed.
[0015]
On the other hand, if the burr grows and exceeds the allowable amount in the escape portion, the material exceeding this allowable amount will sink into the contact portion between the build-up material and the base material. The material flows between the tip of the build-up material and the base material from the escape portion through the contact portion between the burrs of the build-up material and the base material. Therefore, it is difficult to apply stress in the radial direction of the build-up material, and also from this point, vibration of the build-up material is suppressed. If the radial dimension of the build-up material is set to be equal to or greater than the axial dimension of the build-up material as the shape of the relief portion, the burr material can flow well in the axial direction of the build-up material, and the meat This is preferable because stress can be hardly applied in the radial direction of the pile.
[0016]
In this way, if the escape member is provided in the attachment member, the material of the burr is allowed in a state where it is difficult to apply a radial stress to the build-up material with the growth of the burr while allowing some burr to occur. Can be embedded in the contact portion between the build-up material and the base material, so that the vibration of the build-up material can be suppressed and the material of the build-up material can be satisfactorily fixed to the base material.
[0017]
Further, in the above means,
“A core runout suppressing member that abuts on the side surface of the buildup material to suppress runout of the buildup material is provided, and the buildup material is rotated by stabilizing the rotation axis with the runout suppression member. Friction build-up method "
It is good.
[0018]
In this friction build-up method, the run-out vibration generated in the build-up material is suppressed by the run-out suppressing member, so that the material of the build-up material can be satisfactorily fixed to the base material. The core runout suppressing member may be disposed on the base material side so as to move relative to the build-up material, or the meat may be moved relative to the base material. You may arrange | position to the serving material side.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, an example of an embodiment of the friction build-up method according to the present invention will be described in detail with reference to the drawings. The friction build-up method according to the present invention can form a thick build-up layer made of the same or different material as the base material in a short time on the surface of the base material, and is not particularly limited. However, as a surface modification of ferrous metals such as steel and cast iron, a non-ferrous metal such as nickel, aluminum, titanium, and copper, or an alloy of these non-ferrous metals, etc., or a surface layer of foreign metal is formed. This is a technique that can be suitably used for forming a built-up layer of a homogeneous metal in mold correction or the like.
[0020]
As shown in FIG. 1A, in the friction build-up method, by rotating the build-up material 20 with respect to the base material 10 (shown by an arrow A) and moving it relatively (shown by an arrow B). The build-up material 20 is transferred to the base material 10 to form a build-up layer. In the friction build-up method according to the present invention, as shown in FIGS. 1 (a) and (b), the base material is formed. An attachment member 40 is provided on the side of the contact portion between the build-up material 20 and the build-up material 20 so that burrs generated on the side of the build-up material 20 are pressed against the attachment member 40. The build-up material 20 is moved relative to 10.
[0021]
Here, in this example, the build-up material 20 is formed in a columnar shape. On the other hand, the attachment member 40 is formed in an elongated shape with a rectangular column shape, and is fixed to the base material 10 on the surface of the base material 10 so as to extend along the moving direction of the build-up material 20. . Further, the attachment member 40 is disposed in contact with the peripheral surface of the build-up material 20. Further, the attachment member 40 is arranged on the side where the rotation direction of the build-up material 20 faces the moving direction of the build-up material 20 with respect to the attachment member 40 at the contact portion between the build-up material 20 and the attachment member 40. Has been. Such an arrangement mode of the attachment member 40 is a down-cut mode in a cutting process such as milling when the build-up material 20 is assumed to be a cutting tool and the attachment member 40 is assumed to be a workpiece.
[0022]
In such a friction build-up method, since the burrs protruding to the side of the build-up material 20 are pressed by the attachment member 40, the material of the burrs sinks into the contact portion between the build-up material 20 and the base material 10, It is used as a material for forming the build-up layer. Therefore, the surplus material used as a burr | flash can be reduced.
[0023]
Next, the comparative example which paid attention to the build-up efficiency (%) is demonstrated by the conventional friction build-up method which does not provide the attachment member 40, and the friction build-up method which concerns on this invention. Here, the build-up efficiency refers to the base material 10 with respect to the material consumed from the cylindrical build-up material 20 as the raw material, including the material transferred to the base material 10 and the material that has become burrs. The ratio of the transferred material, that is, the material used as the material for forming the build-up layer is shown.
[0024]
In this comparative example, a plate material of length 230 mm × width 75 mm × thickness 10 mm made of the general structural rolled steel SS400 is used as the base material 10, and the austenitic stainless steel SUS316 is used as the build-up material 20. A rod with a diameter of 20 mm and a length of 150 mm was used, and a square member with a side of 25 mm made of a general structural rolled steel SS400 was used as the attachment member 40. Further, as various conditions of the friction build-up method, friction pressure for pressing the build-up material 20 against the base material 10: P (MPa), the number of rotations of the build-up material 20: N (rpm), the meat with respect to the base material 10 The experiment was conducted by setting four types of relative feed rates V (mm / s) of the primed material 20 as follows.
(1) P = 50.9 MPa, N = 800 rpm, V = 8 mm / s
(2) P = 70.0 MPa, N = 800 rpm, V = 8 mm / s
(3) P = 50.9 MPa, N = 1200 rpm, V = 8 mm / s
(4) P = 50.9 MPa, N = 800 rpm, V = 2 mm / s
[0025]
As a result of the experiment, as shown in FIG. 2, the conventional friction build-up method had a low build-up efficiency of less than 40% under all conditions, as shown by the bar graph a (shaded graph). On the other hand, in the friction build-up method according to the present invention, as shown in the bar graph b (open graph), it reaches 75% at the minimum under all conditions, and the high build-up exceeds 90% at the maximum. Efficiency could be obtained, and the conventional build-up efficiency could be improved more than twice.
[0026]
By the way, the friction build-up method according to the present invention is not limited to the above-described example, and various changes can be made as follows, for example, in the arrangement mode of the attachment member 40.
[0027]
For example, the attachment member 40 is not limited to be disposed so as to be in contact with the circumferential surface of the build-up material 20, but between the build-up material 20 and the attachment member 40, for example, with respect to the build-up material 20 having a diameter of 20 mm. The attachment member 40 may be arranged so that an appropriate clearance such as 1 mm is provided. Here, when the clearance is provided, if the clearance is too large, the effect of suppressing burrs is reduced. Therefore, the clearance is 2% or less, preferably 1% or less, more preferably, with respect to the diameter of the build-up material 20. It should be 0.5% or less.
[0028]
Further, in the contact portion between the build-up material 20 and the attachment member 40, the rotation direction of the build-up material 20 is the same as the moving direction of the build-up material 20 with respect to the attachment member 40. It may be arranged on the side. Such an arrangement mode of the attachment member 40 is an up-cut mode in a cutting process such as milling when the build-up material 20 is assumed to be a cutting tool and the attachment member 40 is assumed to be a workpiece.
[0029]
However, in such an up-cut mode, the burr material of the build-up material 20 moves from the rear side in the moving direction of the build-up material 20 that moves relative to the base material 10. Therefore, the burr material collides with the material that moves from the front end of the build-up material 20 to the base material 10, and the build-up material 20 is likely to vibrate. . On the other hand, in the down cut mode as in the example described above, the burr material of the build-up material 20 moves from the front side in the moving direction of the build-up material 20 that moves relative to the base material 10. 10 and the build-up material 20 is supplied to the contact portion, the burr material flows smoothly and the build-up material 20 is likely to vibrate. Therefore, it is preferable to arrange the attachment member 40 so as to be in a down cut mode.
[0030]
By the way, for example, as shown in FIG. 3A, a runout suppression member 50 that abuts against the side surface of the buildup material 20 and suppresses the runout of the buildup material 20 may be provided. By providing the core runout suppressing member 50 in this manner, vibration generated in the build-up material 20 can be suppressed, the rotation axis of the build-up material 20 can be stabilized, and the material of the build-up material 20 can be used as the base material 10. Can be satisfactorily fixed to the surface of the film.
[0031]
In the example shown in FIG. 3A, a long shape serving as a guide for movement of the build-up material 20 by abutting the side surface of the build-up material 20 at a portion facing the attachment member 40 on the surface of the base material 10. The core runout prevention member 50 is extended along the moving direction of the build-up material 20. Here, if the core runout prevention member 50 is configured such that the contact portion with the build-up material 20 is located above the attachment member 40, the burrs generated in the buildup material 20 are prevented from running out. It is difficult to interfere with the member 50, which is preferable. The core runout prevention member 50 is not limited to be provided on the base material 10 side, and may be provided on the buildup material 20 side so as to move relative to the base material 10 together with the buildup material 20. .
[0032]
For example, as shown in FIG. 3B, in the attachment member 40, a relief portion 41 may be provided at a portion corresponding to a contact portion between the base material 10 and the build-up material 20. Here, in the example shown in FIG. 3B, as the escape portion 41, a portion having a triangular cross section formed by chamfering a portion corresponding to a contact portion between the base material 10 and the build-up material 20 is shown. Not limited to this, as shown in FIG. 3C, various shapes such as a relief section 41 having a rectangular cross section can be employed.
[0033]
By providing the escape portion 41 on the attachment member 40 in this way, the burr material exceeding the allowable amount is allowed to pass through the lower surface of the burr from the escape portion 41 while allowing the burr generated from the build-up material 20 to some extent. It can be made to flow into the contact portion between the padding material 20 and the build-up material 20. Therefore, even if the burrs of the build-up material 20 are pressed by the attachment member 40, it is difficult for radial stress to be applied to the build-up material 20, and the core run-out of the build-up material 20 can be made difficult to occur. If the radial dimension of the build-up material 20 is set large and the axial dimension of the build-up material 20 is set small as the shape of the escape part 41, the side of the build-up material 20 allowed by the escape part 41 is set. The burrs protruding in the direction can be greatly expanded in the radial direction of the build-up material 20. Thereby, the material of the burr | flash exceeding the allowance can be sunk in the lower surface of a burr | flash, without giving big stress to the radial direction of the build-up material 20. FIG.
[0034]
On the other hand, the attachment member 40 is not limited to be provided on the base material 10 side, but may be provided on the build-up material 20 side so as to move relative to the base material 10 together with the build-up material 20. For example, FIG. 4 shows an example in which the attachment member 40 is provided on the build-up material 20 side.
[0035]
In this example, centering is performed to stabilize the rotational axis of the build-up material 20 by inserting the build-up material 20 into a member on the apparatus (not shown) side that rotates the build-up material 20 and presses against the base material 10. A device (not shown) is provided. The centering device is provided with one or more rollers 60 having a rotation axis substantially parallel to the rotation axis of the build-up material 20. Here, each roller 60 is disposed around the build-up material 20 so as to contact the outer peripheral surface of the build-up material 20, and suppresses the swing of the rotating shaft core of the build-up material 20. The shake suppressing member 50 is configured. In addition, each roller 60 is disposed such that its lower surface abuts against the base material 10 or with a slight clearance between the lower surface and the surface of the base material 10. Such a roller 60 presses the burr generated at the tip of the build-up material 20 as the build-up material 20 rotates, and causes the burr material to enter the contact portion between the build-up material 20 and the base material 10. It is also what constitutes the attachment member 40. In this example, the roller 60 is provided with three rollers 60. However, the roller 60 may be a single roller or a plurality of rollers 60.
[0036]
Thus, in this example, the center runout suppression member 50 and the attachment member 40 are configured to be shared by the rollers 60 of the centering device, and the entire configuration is compactly accommodated. Further, since the centering device moves relative to the base material 10 together with the build-up material 20, unlike the case where the core runout suppressing member 50 and the attachment member 40 are provided on the base material 10 side, the core runout is performed. The build-up material 20 can be freely moved on the surface of the base material 10 without being constrained by the form of the suppressing member 50 or the attachment member 40, and the build-up layers are formed in various patterns on the surface of the base material 10. be able to. Therefore, compared with the case where the core runout suppression member 50 and the attachment member 40 are provided on the base material 10 side, the degree of freedom of the formation pattern of the build-up layer is high, and versatility is improved. In each roller 60 functioning as the attachment member 40, the relief portions 41 having various shapes as described above may be provided on the outer peripheral edge portion of the lower surface on the contact portion side of the base material 10 and the build-up material 20. Is preferred.
[0037]
【The invention's effect】
According to the present invention described in detail above, it is possible to provide a friction build-up method capable of sufficiently effectively using the material of the build-up material.
[Brief description of the drawings]
FIG. 1A is a perspective view showing an outline of a friction build-up method according to the present invention, and FIG. 1B is a sectional front view.
FIG. 2 is a graph showing a comparative example of a conventional friction buildup method and the friction buildup method according to the present invention.
3A is a cross-sectional front view showing an example of a core runout suppressing member, FIG. 3B is a cross-sectional front view showing an example in which a relief portion is provided on the attachment member, and FIG. FIG. 5 is a cross-sectional front view showing another example in which an escape member is provided on the attachment member.
FIG. 4 is a perspective view showing another example of the attachment member and the core runout suppressing member.
5A is a perspective view schematically showing a conventional friction build-up method, FIG. 5B is a cross-sectional front view showing a build-up layer, and FIG. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Base material 20 Build-up material 21 Burr 30 Build-up layer 40 Additional member 41 Relief part 50 Center runout suppression member 60 Roller

Claims (5)

In the friction build-up method of forming the build-up layer by transferring the build-up material to the base material by moving the build-up material while rotating the build-up material relative to the base material,
An attachment member is provided on the side of the contact portion between the base material and the build-up material, and the build-up material is applied to the base material while pressing the burr protruding to the side of the build-up material against the attachment member. A friction build-up method characterized by relatively moving. The friction build-up method according to claim 1, wherein the attachment member is extended along the moving direction of the build-up material on the surface of the base material. The friction build-up method according to claim 1, wherein the attachment member is provided on the build-up material side so as to move relative to the base material together with the build-up material. The escape member is provided in the site | part corresponding to the contact part of the said base material and the said build-up material, The said attachment member is any one of Claim 1 to 3 characterized by the above-mentioned. The friction build-up method described. A core runout suppressing member that abuts against a side surface of the buildup material to suppress runout of the buildup material is provided, and the buildup material is rotated by stabilizing the rotation axis with the runout suppression member. The friction build-up method according to any one of claims 1 to 4.

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