JP2008089007A - Vibration damping member for machine parts, method of manufacturing the same, and machine parts using the vibration damping member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping member for a machine part and a method of manufacturing the same, capable of readily selecting a material according to a demand with few restrictions in respect of the material, being widely applied to a lot of machine parts, and forming nonbonding boundary faces for improving the damping performance with no scales interposed in between. <P>SOLUTION: The vibration damping member includes the nonbonding boundary faces in contact with each other by being not metallurgically bonded. The nonbonding boundary faces are formed by applying shearing stress to the material in hot forming or warm forming, executing half-shearing process as shearing process for forming a slide portion by displacing part of the material to such an extent that it is not separated from a portion therearound, performing descaling of a new surface generated by forming the slide portion, and thereafter executing replacing process for returning the slide portion to its original position in cool forming. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a material for processing parts used in automobiles, construction machines, industrial machines, and the like, and in particular, for machine parts that can greatly improve the vibration damping performance regardless of the material used. The present invention relates to a vibration damping material, a manufacturing method thereof, and a machine part using the same.

  In automobiles, construction machines, industrial machines, etc., each part is driven by power generated by an engine, a motor, or the like. The parts used for them have various required characteristics such as surface pressure resistance and bending strength, and materials suitable for satisfying them are selected and used.

  And most of these materials are alloys such as Fe and Al, but there are drawbacks that are difficult to solve with the materials themselves. In other words, parts made of these alloys are easy to propagate the vibration generated in the environment of use, and there is a limit to the ability to attenuate the vibration with only that part, resulting in noise and lowering the quietness, vibration This may reduce the service life of the parts.

  For example, in recent automobiles, it is not possible to satisfy the strict demands of users by simply having excellent engine performance, and a high level of quietness is required in the car while driving. I came. In the case of automobiles, gear noise is one major factor in noise generation. However, gears that cause noise generation are generally carburized, and there is an adverse effect on gear meshing due to the occurrence of heat treatment distortion. It has been found that this is the cause of noise generation. Therefore, while various technological developments aimed at reducing heat treatment strain have been actively conducted, development of a technique for blocking or reducing generated sound and vibration has been strongly desired.

  Taking this gear noise as an example, in order to prevent the occurrence, it is not unthinkable to perform a finishing process again after the carburizing process to eliminate the heat treatment distortion. However, a large cost is required for the finishing process. In addition, it is technically possible to provide a damper mechanism in the gear or the unit in which it is incorporated, but there is a cost limitation due to securing the space and increasing the number of parts. The current situation is that the adoption of measures is not progressing. Therefore, there has been a strong demand for the development of technology capable of ensuring quietness that can be satisfied by the user even if the produced gear is used with the distortion caused by carburization remaining.

  As the most direct improvement method for this problem, there is a method in which a part is manufactured with a damping material and vibration is absorbed by the part itself. However, as known damping materials, iron-based high alloys, pure Mg, Mg alloys, or Mn-Cu alloys are well known, but it goes without saying that they are all expensive. In addition, when used as a machine structural part, there is a problem that sufficient strength cannot be secured. Moreover, even if it is a composite steel plate with excellent vibration damping properties known in the steel plate field, there are restrictions on the shape of the steel plate when it comes to mechanical structural parts, especially power transmission parts, and the usable range is extremely small . Accordingly, there has been a strong demand for the development of a material capable of imparting excellent vibration damping properties regardless of the type of material without causing these problems.

  As a measure for improving the vibration damping performance without using a material having a special vibration damping property as described above, a method of conventionally introducing an interface such as a crack that is not intentionally metal-bonded into a component is good. For example, the techniques described in Patent Documents 1 and 2 are known.

  Among these, the technique described in Patent Document 1 forms a fragile layer (part) in the material, and then applies a thermal shock such as heating and quenching to intentionally generate cracks in the material, thereby suppressing vibration. It is intended to increase.

  Further, Patent Document 2 intends to form a linear bead portion at a required portion of a metal plate and to enhance the vibration damping effect of the metal plate by cracks generated in the bead portion.

However, the above-described conventional invention has the following problems.
In order to form a brittle layer inside the material, the invention described in Patent Document 1 described above is intentionally carburized in low-carbon steel, or previously used high-carbon steel which is a brittle material, and rapidly cooled to it. It is characterized by giving a thermal shock.

  Therefore, if the technology of Patent Document 1 is used to improve the vibration damping of machine parts, carburization is required even when used for parts that do not require carburization due to strength, or high carbon steel is used. Therefore, materials that are easily cracked, such as high carbon steel, will be used for parts that are not suitable, and it is not possible to select a material that is originally determined to be optimal or a suitable heat treatment, and the selection of materials and heat treatment methods is significantly limited. There is a problem of end.

  In addition, as described in the specification, the invention described in Patent Document 2 uses quench hardening ability, uses a metal plate having high quench hardening ability and high cracking sensitivity, and generates cracks. A feature is that a bead portion is formed at a portion to be caused to be cracked. Therefore, this technique inevitably has its effect unless a metal plate with high quench hardening capability is used. In addition to restrictions on the shape of steel plates, the scope of application is greatly limited. There is a problem that it ends up.

  As an invention made for the purpose of solving the above-mentioned problems, there is a vibration damping material for mechanical parts described in Patent Document 3 and a manufacturing method thereof. This vibration damping material for machine parts has few restrictions in terms of material and can be easily selected according to demand, can be widely applied to many machine parts, and can obtain excellent damping characteristics.

JP-A-52-147510 JP 2000-35082 A International Publication No. WO 2006/025488 A1 Pamphlet

  Patent Document 3 describes a technique for improving vibration damping properties by forming a non-bonded interface by forming a groove by press-fitting or forging and processing in a direction to reduce the space in the groove. However, there is a problem that the formation of the groove part is a large addition to the groove processing punch, and further development of a vibration damping material for machine parts that can be easily manufactured and has high productivity and does not burden the mold is strongly desired. It was.

Further, when a scale is generated on the surface forming the non-bonding interface, or when the scale adheres to the surface, the scale may fall off when the non-bonding interface is formed. If the scale falls off, if it falls on the mold, it will cause damage to the mold and affect the life of the mold. However, there is a problem of adversely affecting the part shape, such as hitting damage.
For this problem, measures such as automatically removing the scale with air are possible, but if possible, it is more preferable to manufacture without installing such equipment.

  The present invention has been made in view of such a conventional problem, and there are few restrictions in terms of material, and it is easy to select a material according to demand, and it can be widely applied to many machine parts. An object of the present invention is to provide a vibration damping material for machine parts and a method for manufacturing the same, which can form a non-bonding interface for improving vibration characteristics without sandwiching a scale.

  1st invention performs the half shear process which is a shear process which applies the shear stress to a raw material between heat | fever or warm, and forms the slide part which shifted so that it may not detach | leave from the surrounding part. The metal surface is formed by performing a descaling process on the new surface generated by forming the slide part, and then performing a fitting back process to return the slide part to the original position in the cold. The vibration damping material for mechanical parts has a non-bonding interface that is in contact with each other.

  The present invention applies a shearing stress to the material hot or warm, and performs a half shear process to form a slide part that is shifted so as not to leave a part of the material from the surrounding part, thereby forming the slide part A de-scaling process is performed on the new surface generated by the process, and then a non-bonding interface is formed by performing a fitting back process to return the slide part to the original position in the cold state. It has a nonbonding interface given to.

  By providing such a non-bonding interface, a sufficiently large vibration damping improvement effect can be obtained. The non-bonding interface can be generated by performing the half shear processing, the descaling process, and the fitting back process. Therefore, if these materials can be processed, there is an advantage that a large vibration damping effect can be obtained in common. Compared with the inventions described in Patent Documents 1 and 2, the material surface limit is made much smaller. Can do.

  Moreover, in order to generate a non-bonded interface by performing the half-shear process, the descaling process, and the fitting back-in process in this order, the position of the non-bonded interface can be set to a position and shape convenient for the machine part. It becomes easy. Therefore, by providing a non-bonded interface at a position where there is no problem in the strength of the part (= position where high stress is not applied), a material that can produce a mechanical part that has a non-bonded interface but does not have any problem in strength Can be obtained.

  Further, in order to ensure excellent vibration damping properties, it is necessary that the generated gap of the non-bonding interface is closed and is in contact without metal bonding. Note that the term “contact” as used herein includes the case where a non-contact portion exists partially or continuously when viewed microscopically, and when viewed with the naked eye without relying on a magnifying glass, it is apparently an interface. It includes all cases that appear to be in contact. In the present invention, as described above, the non-bonding interface in such a state can be easily obtained by performing the half shearing process, the descaling process, and the fitting back process.

  In addition, the scale that is generated or attached to the new surface generated by forming the slide portion is removed by descaling before fitting back. Thereby, the fitting back process can be performed smoothly, the fitting accuracy can be kept high, and the scale can be prevented from being caught in the formed non-bonding interface.

  Here, the descaling process may be any technique as long as the scale can be removed, and is not particularly limited in the present invention. However, among the conventional methods, it is most effective to perform by shot blasting and pickling.

  The above-described fitting back process is performed by cold forging. Because the fitting process is performed in the cold, the processing temperature is low, and the deformation resistance of the slide part and the surrounding part before fitting is high, so that the accuracy of the part shape after fitting can be kept high. Excellent from the viewpoint of molding.

As described above, the vibration damping material for mechanical parts of the present invention performs a descaling process, removes the scale of the new surface, and performs a fitting back process in cold forging, without pinching the scale. It has a non-bonding interface formed with excellent accuracy.
Therefore, according to the present invention, there are few restrictions in terms of material, and it is easy to select a material according to demand, and it can be widely applied to many machine parts, and a non-bonding interface for improving vibration damping is provided. It is possible to provide a vibration damping material for machine parts that is formed without sandwiching a scale.

  In the second invention, a full shearing process, which is a shearing process in which a shearing portion is formed by applying a shearing stress to the material hot or warm to form a slide portion that is displaced so that a part of the material is completely detached from the surrounding region. Performing descaling on the new surface generated by forming the slide part, and then performing a fitting back process to return the slide part to the original position in the cold. The vibration damping material for a machine part has a non-bonding interface that is in contact with each other (claim 3).

  The present invention performs a full shear process, which is a shear process that applies a shear stress to the material hot or warm to form a slide part that is shifted so that a part of the material is completely detached from the surrounding part, The descaling process is performed on the new surface generated by forming the slide part, and then a non-bonding interface is formed by performing a fitting back process to return the slide part to the original position in the cold. It has a non-bonding interface intentionally provided by the procedure of By providing such a non-bonding interface, a sufficiently large vibration damping improvement effect can be obtained.

  The mechanical component damping material of the present invention is the same as the first invention except that the half shear processing in the above-described mechanical component damping material of the first invention is a full shear processing. Therefore, also in this invention, the effect similar to 1st invention can be acquired.

  In the third invention, the first part and the second part that can be fitted and connected to the first part are formed by hot forging or warm forging, respectively, and the descaling process is performed on the portion that becomes the fitting surface. And then has a non-bonding interface formed by performing a fitting and bonding process for fitting and bonding the first part and the second part in the cold state without contacting them metallically. The vibration damping material for machine parts is characterized in that (claim 4).

The present invention provides a non-bonded interface intentionally provided by a specific procedure of forming a non-bonded interface by performing the hot forging or warm forging, the descaling process, and the fitting and bonding process. It is what has. By providing such a non-bonding interface, a sufficiently large vibration damping improvement effect can be obtained.
Further, as long as the material can be subjected to the hot forging or warm forging, the descaling process, and the fitting and bonding process, a large vibration damping effect can be obtained as in the first invention.

  Moreover, in the said hot forging or warm forging, since a 1st component and a 2nd component are each formed by hot forging or warm forging, a scale produces | generates on the surface. Therefore, prior to the mating and joining process, as in the first aspect, the descaling process is performed on the portion that becomes the mating surface of the first part and the second part, and the generated scale is removed. To do. Thereby, the fitting and coupling process in the subsequent process can be performed smoothly, and the fitting and coupling accuracy depending on the location can be kept high. The descaling method is exactly the same as in the first invention.

  In addition, the above-mentioned fitting and bonding process is performed by cold-working until the fitting surface of the finally formed first part and the second part is in a state where the entire surface is almost in contact with each other. It forms an interface. Since it is performed in the cold, the processing temperature of the first part and the second part is low, and the deformation resistance of the first part and the second part before fitting and joining is high. It can be kept high and is excellent in terms of component molding.

By performing a combination of fitting and bonding in cold forging after the descaling process, a non-bonding interface can be formed with excellent accuracy without sandwiching the scale.
As a result, according to the present invention, there are few restrictions on the material surface, and it is easy to select a material according to demand, and it can be widely applied to many machine parts, and further, a non-bonding interface for improving vibration damping It is possible to provide a vibration damping material for machine parts that is formed without sandwiching a scale.

A fourth invention is a method of manufacturing a vibration damping material for a machine part having a non-bonding interface that is in contact without being metallically bonded,
A slide part forming step for performing a half shear process, which is a shearing process for applying a shear stress to the material in a hot or warm state to form a slide part that is shifted so as not to leave a part of the material from the surrounding part;
A descaling process for removing the scale of the surface from the new surface generated by forming the slide part;
A cold forging process for performing a fitting back process for returning the slide part to the original position in the cold is provided. (Claim 14)
According to this manufacturing method, the excellent vibration damping material for machine parts described in the first invention can be reliably manufactured.

A fifth invention is a method of manufacturing a vibration damping material for a machine part having a non-bonding interface that is in contact without being metallically bonded,
A slide part forming step for performing a full shear process, which is a shearing process in which a shearing part is formed by applying a shear stress to the material hot or warm to form a slide part in which a part of the material is completely detached from the surrounding part; ,
Descaling processing to remove the scale of the surface from the new surface generated by forming the slide part,
A cold forging process for performing a fitting back process for returning the slide part to the original position in the cold is provided. (Claim 15)
According to this manufacturing method, the excellent vibration damping material for machine parts described in the second invention can be reliably manufactured.

A sixth invention is a method of manufacturing a vibration damping material for mechanical parts having a non-bonding interface that is in contact without being metallically bonded,
A joined part manufacturing process for forming a first part and a second part that can be fitted and joined to the first part in a hot or warm manner;
A descaling process that removes the scale of the surface of the mating surface;
A manufacturing method of a vibration damping material for mechanical parts, comprising: a cold forging process for fitting and coupling the first part and the second part in the cold. ).
According to this manufacturing method, the excellent vibration damping material for machine parts described in the third invention can be reliably manufactured.

According to a seventh aspect of the present invention, there is provided a mechanical component produced by processing the vibration damping material for a mechanical component according to any one of the first to third aspects.
Using the excellent vibration damping material for machine parts according to any one of the first to third inventions as a material, a machine part produced by adding processing to the material, for example, forming teeth on the vibration damping material for machine parts Such gears are useful because they exhibit excellent vibration damping characteristics.

Hereinafter, the contents of the invention will be described in detail.
The vibration damping material for machine parts according to the first aspect of the present invention is a shearing process in which a shearing stress is applied to the material hot or warm to form a slide part that is shifted so as not to leave a part of the material from the surrounding part. Formed by performing a half-shear process, performing descaling on the new surface generated by forming the slide part, and then performing a fitting back process to return the slide part to the original position in the cold Thus, it has a non-bonding interface that is apparently almost in contact with each other without being metallicly bonded.

In the half-shear processing, a sliding portion that is partially shifted by applying a shear stress to the material in a hot state or a warm state is formed. In addition, the said half shear process is performed by carrying out the shear deformation of a raw material using a pair of die | dye and a punch, for example. Therefore, the management of the non-bonding interface can be controlled only by managing the slide. By adjusting the degree of slide, the non-bonding interface penetrating both surfaces or the non-penetrating non-bonding interface can be controlled. The damping material for machine parts which has can be obtained.
In addition, since it is possible to easily perform the post-fit process in the subsequent process, it is possible to easily obtain a product having excellent dimensional accuracy and stability.

  Further, in the examples described later, only an example in which all the parts on the inner diameter side are slid downward is shown. However, the non-bonding interface only needs to be formed, so the sliding direction is not limited. Therefore, the same effect can be obtained even when the inner diameter side component is slid upward.

Moreover, since the said half shear process is performed in hot or warm, a scale produces | generates. Therefore, the generated scale is removed by a descaling process before performing a post-fit process for forming a non-bonding interface.
Here, as the descaling process, a method by shot blasting or pickling can be selected as described above.

  The descaling process may be performed on at least the new surface serving as the non-bonding interface, but may be performed on the entire material including other parts.

  In the fitting back process, the slide part is returned to the original position in the cold to form a non-bonding interface. Forming the non-bonded interface is completed by applying the process so that the slide part is returned to the original position by fitting back and processing until the entire surface is almost in contact with the final formed interface. To do. This fitting back process can be performed on the material after the descaling process, for example, by a method similar to cold forging.

  The contact on the interface mentioned here is just an appearance, and it is not necessary whether the entire surface is strictly in contact. Therefore, as a result of microscopic observation, even if there is a non-contact part partially or continuously, it does not fall out of the scope of the present invention for that reason, and appears to be almost in contact with the naked eye. It is enough if it is processed to the state. By processing to such a state, the vibration damping property can be greatly improved. In this respect, the same applies to second and third inventions described later.

  Machine parts are often manufactured by forging because of their excellent productivity. Therefore, when applying the present invention to parts that have been manufactured by forging in the past, the conventional forging process includes hot or warm half-shear processing, descaling processing, and cold fitting back processing. By redesigning the process so that it can be performed, it is possible to manufacture a machine part having a non-bonding interface without greatly affecting productivity.

As the forging process, basically, a material heating process, a crushing process, a rough ground process, a finishing process, and a punching process are performed in this order to obtain a final shape.
In the present invention, it is possible to perform a shearing process in any one of a crushing process, a rough ground process, a finishing process, and a punching process. Therefore, it can manufacture, without reducing productivity significantly.

The vibration damping material for mechanical parts of the present invention may be configured such that the non-bonding interface is formed independently on both surface sides along the shearing stress application direction and does not penetrate (claim). Item 2).
In this case, by changing the slide length, the length of the finally generated non-bonding interface can be adjusted. Moreover, it can be set as the state which had the connection part by which the said sliding site | part and the site | part of the circumference | surroundings are not cut away.

  Further, since the effect of improving vibration damping is affected in proportion to the size of the non-bonded interface to be generated, it is necessary to generate a large non-bonded interface to some extent. That is, the larger the area of the non-bonding interface, the greater the effect of damping the vibration. Specifically, it is preferable that the total depth of the non-bonding interfaces formed on the surface sides of both ends is 20% or more of the thickness dimension in the same direction. When the total depth is less than 20%, the vibration damping effect may not be sufficiently obtained. There is no particular upper limit. In order to obtain a sufficient vibration damping effect, it is desirable that the total depth of the non-bonded interface be 50% or more of the thickness dimension in the same direction.

In addition, the non-bonding interface may be formed so as to penetrate both surfaces along the direction in which the shear stress is applied (Claim 5).
If the degree of sliding of the shearing process is increased by using the half-shearing process as the shearing process, a vibration damping material for machine parts having a non-bonding interface penetrating both surfaces along the shearing stress applying direction is obtained. Can be manufactured.

  The vibration damping material for mechanical parts according to the second aspect of the present invention forms a slide part that is shifted so that a part of the material is completely detached from the surrounding part by applying a shearing stress to the material hot or warm. By performing a full shear process that is a shearing process, performing a descaling process on the new surface generated by forming the slide part, and then performing a fitting back process to return the slide part to its original position in the cold It has a non-bonded interface that is formed and appears to be in contact with almost the entire surface without being metallically bonded.

  Similarly to the first invention described above, the sliding direction of the slide part is not limited in the full shear processing. Therefore, the same effect can be obtained even when the inner diameter side component is slid upward.

In addition, since the full shear processing is performed hot or warm, a scale is generated. Therefore, the generated scale is removed by a descaling process before performing a post-fit process for forming a non-bonding interface.
The descaling process and the fitting back process can be performed by the same method as the descaling process in the first invention described above.

  Also in the present invention, it is possible to perform a full shear process, which is a shear process, in any of the crushing process, rough ground process, finishing process, and punching process in the conventional forging process described above. Therefore, by redesigning the conventional forging process, it is possible to manufacture a machine part having a non-bonding interface without greatly affecting productivity.

In addition, the non-bonding interface in the second invention is always in a state of penetrating both surfaces along the shear stress application direction (Claim 5).
Even in this case, there is no problem even if the driving force is transmitted if the non-bonding interface is not a perfect circle or a polygon.

  According to a third aspect of the present invention, the vibration damping material for machine parts is formed by hot forging or warm forging each of the first part and the second part that can be fitted and connected, and removed from the part that becomes the fitting surface. After the scale treatment, the first part and the second part are formed by performing a fitting and joining process for fitting and joining in the cold. Has a non-bonding interface.

  The descaling process is performed on at least a portion serving as a fitting surface between the first part and the second part, and the scale is removed. The descaling process is not particularly limited in the same manner as in the first invention described above, but can be performed, for example, by shot blasting or pickling.

  Further, the fitting / bonding process cold-fits the first part and the second part to complete the formation of the non-bonded interface. The fitting and joining process can be performed in the same manner as the fitting back process in the first and second inventions, and the fitting surface between the finally formed first part and the second part is almost entirely apparent. It comes into contact.

In addition, the non-bonding interface in the third aspect of the invention is always in a state of penetrating both surfaces along the shear stress application direction (Claim 5).
Even in this case, there is no problem even if the driving force is transmitted if the non-bonding interface is not a perfect circle or a polygon.

1st-3rd invention WHEREIN: It is preferable to have the welding part which welded a part of boundary exposed part of the said nonbonding interface.
In this case, by fixing the non-bonding interface part on the surface of the vibration damping material for machine parts from the outside, sufficient strength can be exhibited without impairing the excellent vibration damping property due to the non-bonding interface. it can.

The part of the boundary exposed portion includes single-sided full circumference, double-sided intermittent, single-sided intermittent, etc.
When all the boundary exposed portions of the non-bonding interface are welded, there is a problem that the effect obtained by forming the non-bonding interface is hindered.

Moreover, it is preferable that the depth of a welding part is 1/2 or less of the thickness of the damping material for machine parts.
In this case, it is possible to maintain excellent vibration damping properties by having a non-bonding interface and to ensure sufficient strength.

The welding is preferably laser beam welding or electron beam welding.
In this case, high-precision welding is possible, and a desired portion at the non-bonding interface can be reliably welded.

Moreover, it is preferable that the said welding part has only on the surface of one side of the said damping material for machine parts (Claim 7).
When the welded portion is present continuously or intermittently only on one surface of the vibration damping material for mechanical parts, it is excellent in terms of productivity, and in particular, it substantially inhibits excellent vibration damping properties. It is possible to exhibit sufficient strength without doing so.

Moreover, it is preferable to perform a heat treatment as a pre-process of the descaling process.
In this case, since the material can be softened by the heat treatment, it is possible to facilitate the processing when the shape is changed at the same time in the fitting-back process performed in the cold process of the subsequent process. It is.
Moreover, a scale adheres because of heat treatment. Therefore, it is necessary to perform before descaling.

The vibration damping material for mechanical parts is a gear damping material for forming a gear having damping characteristics, and is provided on a ring-shaped or disk-shaped main body portion and an outer peripheral side surface or an inner peripheral side surface thereof. It has a tooth | gear type | mold formation part, It is preferable that the said non-bonding interface is formed in the axial direction of the said main-body part (Claim 9).
In this case, when the mechanical component damping material is used as a gear damping material for forming a gear having damping characteristics, the effect can be remarkably improved.

  A gear is a part that plays the role of transmitting the power of an engine or the like by meshing teeth with each other, but stress is not uniformly applied to the entire gear part, and the driving force is concentrated on the tooth part. Therefore, a large force may be applied to a region other than the tooth portion on the outer periphery or the inner periphery in a position away from the tooth portion, that is, for example, a gear whose teeth are processed on the outer periphery or the inner periphery. Absent. Depending on the case, a through hole may be partially formed for weight reduction. Therefore, the present inventors pay attention to the stress load state in such a gear, and form a non-bonding interface at a position away from the tooth processing region by an appropriate length. In the same way as above, a fatigue test with a driving force applied was performed. As a result, when the driving force to be applied was increased, it was understood that the strength limit of the gear occurred due to the destruction of the tooth portion, not the destruction from the non-bonding interface, and the effectiveness of the present invention was confirmed. Is.

The gears are often subjected to surface hardening treatment such as carburizing when it is necessary to obtain high strength, but the present invention has excellent vibration damping properties regardless of the presence or absence of such surface hardening treatment. Can be obtained.
Therefore, by manufacturing a gear using the vibration damping material for machine parts of the present invention, it is possible to easily manufacture a gear remarkably excellent in damping performance.

In the first and second aspects of the invention, the slide part is formed by using a mold set in a forging press. In the third aspect of the invention, Since the portion to be formed is characterized by being formed by hot forging or warm forging, a variety of shapes can be selected for the non-bonding interface. For example, it may be an annular shape or a regular polygon, and either a symmetric shape or an asymmetric shape may be used (claims 10 to 13).
In the case of an asymmetric shape, there are an irregular polygon, an irregular waveform, and various other shapes. In this case, it can be expected to further improve the vibration damping effect.

  In the method for manufacturing a vibration damping material for mechanical parts according to the fourth aspect of the invention, the half shear processing can freely adjust the area of the non-bonding interface by adjusting the slide length, and the amount to be shifted even in the half shear processing is small. When the number is relatively large, it is possible to obtain a vibration damping material for a machine part having a non-bonding interface formed through both surfaces.

4th-6th invention WHEREIN: It is preferable to have further the welding process which forms the welding part which welded a part of boundary exposed part of the said non-bonding interface.
In this case, as in the first to third inventions, by fixing the non-bonded interface portion on the surface of the vibration damping material for machine parts by welding from the outside, excellent vibration damping performance due to the non-bonded interface is obtained. A vibration damping material for machine parts that exhibits sufficient strength can be produced without loss.
Further, as described above, the depth of the welded portion is preferably ½ or less of the thickness of the vibration damping material for mechanical parts, and the welding is not particularly limited in its method, for example, laser beam welding. It can be performed by electron beam welding.

Moreover, it is preferable that the said welding part has only on the surface of one side of the said damping material for machine parts (Claim 18).
When the welded portion is present continuously or intermittently only on one surface of the vibration damping material for mechanical parts, it is excellent in terms of productivity, and in particular, it substantially inhibits excellent vibration damping properties. Therefore, it is possible to manufacture a vibration damping material for machine parts that exhibits sufficient strength.

Moreover, it is preferable to perform a heat treatment as a pre-process of the descaling process.
In this case, since the material can be softened by the heat treatment, it is possible to facilitate the processing when the shape is changed at the same time in the fitting-back process performed in the cold process of the subsequent process. It is.
Moreover, a scale adheres because of heat treatment. Therefore, it is necessary to perform before descaling.

(Example 1)
Next, the Example concerning the damping material for machine parts of this invention is described using FIG.1 and FIG.2.
As shown in FIGS. 1 and 2, the vibration damping material 1 for machine parts of this example applies shear stress to the material 2 in the hot or warm state so that a part of the material does not leave the surrounding portion 21. A half shear process, which is a shearing process for forming the slide part 22 displaced in the direction, is performed, the new surface 23 generated by forming the slide part 22 is descaled, and then the slide part 22 is cooled in the cold. It has the non-bonding interface 24 which is formed by performing the fitting-in process which returns to the original position and is in contact without metallic bonding.

  The steel used as the material 2 is SCR420H, and its chemical composition is 0.21% C-0.28% Si-0.83% Mn-1.10% Cr-0.028Al-0.011% N. It is steel.

Specifically, in the manufacturing method of the vibration damping material 1 for mechanical parts, first, the steel was heated and subjected to a crushing process to obtain the material 2. Then, as a slide site | part formation process, the half shear process was performed in the rough ground process between hot. Then, after performing the descaling process with respect to the new surface 23 as a descaling process, the cold fitting process was implemented as a cold forging process, and the damping material 1 for machine parts was produced. In this example, after that, finishing processing was further performed in which a bottomed hole was machined in the center, and finally a part having a final shape was obtained by punching.
Hereinafter, half-shear processing, descaling processing, and fitting back processing corresponding to the present invention will be further described.

  As shown in FIG. 1 (b), the half-shear processing is hot forging, applying a shear stress in the direction B shown in the figure to adjust the slide length d. It shifted so that it might not detach | leave from the site | part 21 around.

  Next, the descaling process was performed by projecting a steel shot having a diameter of 1.4 mm on the new surface 23 for 5 minutes. As a result, the scale formed or attached to the new surface generated by the half shear processing was removed.

  Further, as the above-mentioned fitting back processing, as shown in FIG. 1 (d), processing was applied in a direction in which the slide portion 22 returned to the original state in the cold state. As a result, on the appearance, the inner diameter side of the portion 21 around the material 2 and the outer diameter side of the slide portion 22 formed by the half-shear process which is a shearing process are in contact with each other.

FIG. 2 shows a state viewed from the A direction in FIG. As shown in the figure, the non-bonding interface 24 was formed in a circular shape at a distance L from the center O of the material 2.
FIG. 1D is a cross-sectional view of the vibration damping material 1 for machine parts. As shown in FIG. 1D, a non-bonding interface 24 is formed through both surfaces along the shear stress applying direction B. ing.

  In addition, when the non-bonding interface 24 penetrates, depending on the application, there may be a problem in use as a component. In this case, as shown in FIG. 1E, it is preferable to have a welded portion 25 in which a part of the boundary exposed portion of the non-bonding interface 24 is welded after the slide portion 22 is fitted back. In these respects, the same applies to the embodiments described later.

  Further, the slide part can be prevented from easily separating by a method of applying a slight compressive deformation in the direction of the center of the height of the vibration damping material for machine parts to deform the non-bonding interface. Furthermore, the slide part 21 can be more reliably prevented from detaching by deforming in the direction of the center of the outer diameter side of the vibration damping material for machine parts.

(Example 2)
This example is an example in which the same steel as in Example 1 is used and the degree of sliding in the half shear process in Example 1 is suppressed. Other steps were performed in the same manner as in Example 1.
FIG. 3 shows a cross-sectional view of the vibration damping material 102 for machine parts produced in this example. From this figure, the non-bonding interface 24 of the vibration damping material 102 for the machine part of this example is formed along the shear stress applying direction B and is formed on both surfaces independently with the connecting portions 26 interposed therebetween, and penetrates. I understand that it is not.

(Example 3)
In this example, using the same steel as in Example 1, the half shearing process in Example 1 is applied to the full shearing process in which a slide part 22 is formed so as to be completely detached from the part 21 around the material 2. This is a changed example. Other steps are the same as those in the first embodiment. The manufacturing process of the vibration damping material 103 for machine parts of this example is shown in FIG.
As shown in FIG. 4 (b), the full shearing process was performed so that the slide part 22 was completely detached from the part 21 around the material 2.

  As a result, in terms of appearance, the inner diameter side of the portion 21 around the material 2 and the outer diameter side of the slide portion 22 formed by full shear processing were in contact with each other. FIG. 4D shows a cross section of the vibration damping material 103 for machine parts produced in this way. As is known from the figure, the non-bonding interface 24 of the vibration damping material 103 for machine parts is formed so as to penetrate both surfaces along the shear stress applying direction B.

Example 4
The mechanical component damping material 104 of this example is formed by hot forging a first part 41 and a second part 42 that can be fitted and connected to the first part 41, and a portion 43 that becomes a fitting surface. Formed by performing a descaling process on 44 and then performing a fitting connection for fitting the first part 41 and the second part 42 in a cold state without metallic connection. The non-bonding interface (fitting surface) 24 is provided. The manufacturing process of the vibration damping material 104 for machine parts of this example is shown in FIG.

  The steel used as the first part and the second part is SCr420H.

As a method of manufacturing the vibration damping material 104 for mechanical parts, first, as shown in FIGS. 5A and 5C, the steel was heated and subjected to a crushing process to obtain materials 45 and 46. Then, as shown to FIG.5 (b), (d), the 1st component 41 and the 2nd component 42 were produced by hot forging as a coupling component manufacturing process. Thereafter, as a descaling process (FIG. 5E), descaling is performed on the portion 43 that becomes the fitting surface of the first component 41 and the portion 44 that becomes the fitting surface of the second component 42. did. Then, as shown in FIG.5 (f), the fitting coupling process of the 1st component 41 and the 2nd component 42 was performed in cold as a cold forging process. In this example, after that, finishing processing was further performed in which a bottomed hole was machined in the center, and finally a part having a final shape was obtained by punching.
Hereinafter, the bonding site manufacturing process, descaling process, and fitting and bonding process corresponding to the present invention will be further described.

  In the bonding site manufacturing step, the first part 41 having a ring shape and the second part 42 having a disk shape were formed by hot forging the material 45 and the material 46 in the hot state.

  The descaling process was performed in the same manner as in Example 1 described above. As a result, the scale formed on the portions 43 and 44 serving as the fitting surfaces of the first component 41 and the second component 42 was removed.

  As shown in FIG. 5 (f), the fitting and coupling process was performed in a direction in which the first component 41 and the second component 42 were fitted and coupled. As a result, in appearance, the portion 43 that becomes the fitting surface of the first component 41 and the portion 44 that becomes the fitting surface of the second component 42 are in contact with each other, and contact is made without metallic connection. A non-bonding interface 24 is formed.

(Example 5)
In this example, the present invention is applied to the spur gear 5 as shown in FIGS. First, FIG. 6 shows a manufacturing method of a basic conventional spur gear 9.
As shown in FIG. 6, the conventional spur gear manufacturing process includes a material heating step (a) for heating the massive steel 27, a crushing step (b) for crushing the heated steel 27, and a material 2 for finishing forging. A rough ground step (c) to form the shape, a finishing step (d) for processing the raw material 2 into a rough-shaped intermediate body 28, and a central portion 29 of the rough-shaped intermediate body 28 is removed. Step (e) is performed in order. When this manufacturing process is performed, a conventional spur gear 9 having no non-bonding interface shown in FIG. 6G is obtained.

  This conventional spur gear 9 has an inner tube portion 58 having a shaft hole 59 in the center, a ring-shaped thin portion 55 on the outer peripheral side thereof, and teeth on the outer peripheral side thereof outwardly. The tooth mold forming part 51 having the above-described tooth mold forming area is provided.

  Next, a manufacturing method to which the present invention is applied will be described. As shown in FIGS. 7A to 7C, the same process as the conventional one shown in FIG. 6 is performed from the material heating process (a) to the rough ground process (c). And, as shown in FIG. 7 (d), the point to be noted is that the half-shearing process which is a shearing process is incorporated in the finishing process (FIG. 6 (d)) in the conventional manufacturing process, and the conventional manufacturing process. The descaling process was performed after the drawing process (FIG. 6E), and the fitting back process (FIG. 6F) in the conventional manufacturing process was performed in the cold. Other processes are the same as the conventional manufacturing process. The same steel as in Example 1 was used.

  As the half-shear processing, as shown in FIG. 7 (d), a shear stress is applied in the B direction to the thin portion 55 described later, and the slide portion 22 composed of a part of the inner cylindrical portion 58 and the thin portion 55 is obtained. This was performed by shifting within a range in which the tooth mold forming portion 51 and the thin portion 55 are not separated from the surrounding portion 21.

  Next, the descaling process (FIG. 7F) was performed in the same manner as in Example 1. Thereafter, the spur gear 5 having the non-bonding interface 24 penetrating both surfaces along the shearing stress applying direction and not sandwiching the scale is obtained by performing fitting back processing (FIG. 7G) in the cold. Could be formed.

  FIG. 8 is a view of the spur gear 5 viewed from the direction C in FIG. The spur gear 5 has the same dimensions and shape as the conventional spur gear 9 except that the non-bonding interface 24 is provided in a thin portion 55 that connects the inner cylinder portion 58 and the tooth shape forming portion 51. It is a feature. A region S indicates a tooth mold forming region.

  As described above, in this example, the finishing process in the conventional manufacturing process (FIG. 6 (d)) is a process capable of performing the half-shear process, and the descaling process is performed before the fitting back process. The process has been redesigned so that it can be fitted back in the cold. Therefore, as shown in FIGS. 7 (g) and 8, the final shape has an inner cylindrical portion 58 provided with a shaft hole 59 in the center, and the non-bonding interface 24 that does not sandwich the scale on the outer peripheral side is pivoted. It is possible to form the spur gear 5 having the ring-shaped thin portion 55 provided in the direction and the tooth-forming portion 51 having the tooth-forming region S having the teeth formed outwardly on the outer peripheral side thereof. It was.

(Example 6)
In this example, as shown in FIG. 9, the half shear processing (FIG. 7D) in the fifth embodiment is changed to full shear processing in which the slide part 22 is shifted so as to completely separate from the surrounding part 21. is there. Other steps are the same as those in the fifth embodiment.
The final shape obtained in this example is exactly the same as in Example 5.

(Example 7)
This embodiment is another embodiment in which the present invention is applied to the spur gear 6 as shown in FIG.
A manufacturing method to which the present invention is applied will be described. As shown in FIGS. 10A to 10D, the same process as the conventional process shown in FIG. 6 is performed from the material heating process (a) to the finishing process (d). And, as shown in FIGS. 10 (e) to 10 (g), the notable point is that the above-mentioned conventional manufacturing process is incorporated into the punching process (FIG. 6 (e)) with a half-shear process that is a shear process, The descaling process was performed and the fitting back process was performed in the cold. Other processes are the same as the conventional manufacturing process. The same steel as in Example 4 was used as the steel of the first part and the second part.

  As the half shear processing, as shown in FIG. 10 (e), a shear stress is applied in the B direction to the thin portion 55 described later, and the slide portion 22 composed of the inner cylindrical portion 58 and a part of the thin portion 55 is formed. It was performed by shifting so as not to leave the peripheral portion 21 consisting of the tooth mold forming portion 51 and a part of the thin portion 55.

Next, the descaling process (FIG. 10F) was performed in the same manner as in Example 1. Thereafter, a spur gear 6 having a non-bonding interface 24 that penetrates both surfaces along the direction of applying the shear stress and does not sandwich the scale is obtained by performing fitting back processing (FIG. 10G) in the cold. Could be formed.
The spur gear 6 shown in FIG. 10 (g) has the same dimensions and shape as the conventional spur gear 9, but is connected to the thin wall portion 55 that connects the inner cylinder portion 58 and the tooth shape forming portion 51. A feature is that an interface 24 is provided.

  As described above, in this example, the conventional manufacturing process is changed to a forging process called a punching process in the conventional manufacturing process (FIG. 6 (e)), which can perform the above-described half-shear processing. A scale process was performed, and the process was redesigned so that it could be cold fitted back. Therefore, as shown in FIG. 10G, the final shape has an inner cylindrical portion 58 provided with a shaft hole 59 in the center, and a non-bonding interface 24 in which no scale is sandwiched on the outer peripheral side in the axial direction. It was possible to form the spur gear 6 in which the ring-shaped thin portion 55 was provided and the tooth shape forming portion 51 having the tooth shape forming region in which the teeth were formed outward on the outer peripheral side thereof.

(Example 8)
In this example, as shown in FIG. 11, the half shear processing (FIG. 10E) in the seventh embodiment is changed to a full shear processing in which the slide part 22 is shifted so as to be completely detached from the surrounding part 21. is there. Other steps are the same as those in Example 8.
The final shape obtained in this example is exactly the same as in Example 8.

Example 9
In this example, the present invention is applied to the spur gear 7 as shown in FIG.
A manufacturing method to which the present invention is applied will be described. As shown in FIGS. 12A and 12B, the material heating step (a) crushing step (b) is the same as the conventional step shown in FIG. And, as shown in FIGS. 12 (c) to 12 (g), the point to be noted is that half shear processing which is shearing processing is incorporated into the rough ground process (FIG. 6 (c)) in the conventional manufacturing process, and slides are made. The descaling process was performed after the part formation process, and then the fitting back process was performed as a cold forging process. Other processes are the same as the conventional manufacturing process. The same steel as in Example 1 was used.

As the half shear processing, as shown in FIG. 12 (c), a shear stress is applied in the B direction to a portion to be a thin portion 55 described later, and the slide portion 22 inside thereof is not detached from the surrounding portion 21. It was done by shifting as follows.
Then, after performing a finishing process (FIG. 12D) and a drawing process (FIG. 12E) in order, the descaling process (FIG. 12F) is applied to the new surface 23 as in the first embodiment. I went there.
Thereafter, in the cold, a re-fitting process (FIG. 12 (g)) is performed to form a spur gear 7 having a non-bonding interface 24 that penetrates both surfaces along the shear stress applying direction and does not sandwich the scale. We were able to.

  The spur gear 7 shown in FIG. 12 (g), which is the final shape, has the same dimensions and shape as the conventional spur gear 9, but has a thin wall portion 55 that connects the inner cylinder portion 58 and the tooth shape forming portion 51. In addition, the non-bonding interface 24 is provided.

  As described above, in this example, the conventional manufacturing process is changed to the rough ground process in the conventional manufacturing process (FIG. 6C) capable of performing the half-shear processing, and then descaling is performed. (FIG. 12 (f)) was performed, and the process was redesigned so as to be able to perform the fitting back process in the cold. Therefore, as shown in FIG. 12 (g), as a final shape, a ring-shaped thin portion having an inner cylindrical portion 58 provided with a shaft hole 59 in the center and having a non-bonding interface 24 in the axial direction on the outer peripheral side thereof. 55, and a spur gear 7 provided with a tooth-forming part 51 having a tooth-forming region in which teeth are formed outwardly on the outer peripheral side thereof.

(Example 10)
In this example, as shown in FIG. 13, the half shear processing (FIG. 12C) of the tenth embodiment is changed to full shear processing in which the slide part 22 is shifted so as to completely separate from the surrounding part 21. is there. Other steps are the same as those in Example 10.
The final shape obtained in this example is exactly the same as in Example 10.

(Example 11)
In this example, a finishing process and a punching process are further performed on the vibration damping material 1 for mechanical parts produced in Example 1, and a part of the boundary exposed portion of the non-bonding interface 24 is welded. Table 1, FIG. As shown in FIG. 15, five types of spur gears 8 (Sample E1 to Sample E4) were produced. Further, as shown in the figure, the spur gear 8 has a shaft hole portion 89, and the thickness is constant up to the outer peripheral tooth forming region S. The tip diameter g was 96 mm, the tooth width h was 16 mm, the module was 3, and the number of teeth was 30.

Further, as shown in Table 1, Samples E1 to E4 as examples of the present invention employ those having a non-bonding interface 24, and the non-bonding interface diameter D is 76.0 mm. Further, the non-bonding interface 24 is formed so as to penetrate both surfaces of the spur gear 8 along the shear stress application direction.
FIG. 15 is an explanatory view showing a sample E3 and a sample E4 having welds 25 formed intermittently at a pitch of 30 °.

Moreover, in order to make it possible to clearly compare the difference from the conventional product, as a comparative example (sample C1), as a comparative example (sample C2) FCD500, which is one of the spheroidal graphite cast irons that has been conventionally said to have excellent vibration damping properties compared to steel, was also processed to the same dimensions as the spur gear 8.
Furthermore, as a comparative example, a spur gear (sample C3, sample C3, in which all the boundary exposed portions of the non-bonding interface 24 are welded by performing a finishing process and a punching process on the vibration damping material 1 for machine parts manufactured in Example 1). Sample C4) was prepared.

Further, in actual gears, carburizing is often performed in order to satisfy the required strength, and it is necessary to accurately grasp the influence of the processing. Therefore, vibration suppression evaluation after carburizing treatment was performed on these spur gears 8 (sample E1 to sample E4) and samples C1 to C4.
The carburizing treatment was performed under the conditions of carburizing treatment conditions of 950 ° C. × 3 hours.

  In the vibration damping evaluation, the position of S1 shown in FIG. 16 is vibrated with a hammer while the sample is suspended on two wires, and the vibration of the end face of the diagonal tooth generated by the vibration is laser-induced. The measurement was performed using a displacement meter. Then, the logarithmic damping rate was calculated from the obtained vibration waveform, and the improvement level of the damping performance was evaluated based on the calculated value. The results are shown in Table 1. In addition, the numerical value shown in Table 1 displays the logarithmic attenuation rate of each gear test piece as a ratio when the logarithmic attenuation rate of the sample C1 as a comparative example is 1.

As is clear from Table 1, the examples (sample E1 to sample E4) in which the non-bonding interface was introduced into the material by using the half-shear processing, the descaling processing, and the fitting back processing as in this example are not bonded. The logarithmic decay rate is higher than that of the comparative example (sample C1 and sample C2) having no interface at all and the comparative example (sample C3 and sample C4) having a welded portion where all the boundary exposed portions of the non-bonded interface are welded. It can be seen that the vibration damping is greatly improved by the generation of the bonding interface.
In particular, the sample E1 has a remarkably high logarithmic decay rate, and an extremely high effect was confirmed.

  Moreover, although the sample used in this example used the vibration damping material 1 for mechanical parts produced in the above-described Example 1 which is an example of the first invention, the above-mentioned example which is an example of the second invention was used. Even if it is carried out using the vibration damping material 103 for machine parts produced in the third embodiment and the vibration damping material 104 for machine parts produced in the above-described fourth embodiment which is an embodiment of the third invention, It was confirmed that the result could be obtained.

  In Examples 1 to 10, the shape of the non-bonding interface was all circular in order to facilitate the experiment. However, in the present invention, the non-bonded interface is not limited to a circular shape as long as the vibration damping property is improved, and other shapes can of course be used.

  For example, as shown in FIGS. 17 and 18, when a disk-shaped member 3 as a vibration damping material for machine parts or a machine part is assumed, regular polygonal non-bonding interfaces 31 and 32 can be formed. Further, as shown in FIGS. 19 and 20, non-bonding interfaces 33 and 34 having an asymmetrical polygonal shape may be used. Examples of other non-bonding interface shapes are shown in FIGS. FIG. 21 shows an example in which a non-bonding interface 35 is provided in a square spline shape. FIG. 22 shows an example in which a non-bonding interface 36 is provided in an involute spline shape. FIG. 23 shows an example in which a non-bonding interface 37 is provided in a serrated shape.

Further, as shown in FIGS. 19 and 20, when non-equal polygonal non-bonding interfaces 33, 34, etc. are adopted, the vibration damping property is improved as compared with the case of equilateral polygons for the following reason. it is conceivable that.
That is, when teeth are formed at equal intervals on the inner diameter side or outer diameter side as in a gear, the meshing of the gear pair has a specific frequency according to the rotation frequency and the number of teeth. Similarly, torque is generated at a specific frequency. In the case of an equilateral polygonal non-bonded interface, the vibration damping effect can be reduced because the non-bonded interface receives the torque and vibration periodically transmitted from the meshing tooth surface at a cycle corresponding to the number of angles. There is sex. On the other hand, if the interface is an unequal side, the vibration-damping interface has an indefinite period, so that the vibration suppression effect can be further improved in an actual gear driving environment.

Explanatory drawing which shows the manufacturing method of the damping material for machine parts in Example 1. FIG. Explanatory drawing which shows the damping material for machine parts in Example 1. FIG. Explanatory drawing which shows the state after non-bonding interface shaping | molding in Example 2. FIG. Explanatory drawing which shows the manufacturing method of the damping material for machine parts in Example 3. FIG. Explanatory drawing which shows the manufacturing method of the damping material for machine parts in Example 4. FIG. Explanatory drawing which shows the manufacturing method of the conventional spur gear. Explanatory drawing which shows the manufacturing method of the spur gear in Example 5. FIG. Explanatory drawing which shows the spur gear in Example 5. FIG. Explanatory drawing which shows full-shear processing in Example 6. FIG. Explanatory drawing which shows the manufacturing method of the spur gear in Example 7. FIG. Explanatory drawing which shows full share processing in Example 8. FIG. Explanatory drawing which shows the manufacturing method of the spur gear in Example 9. FIG. Explanatory drawing which shows full-shear processing in Example 10. FIG. Explanatory drawing which shows the spur gear in Example 11. FIG. Explanatory drawing which shows the spur gear in Example 11. FIG. Explanatory drawing which shows the vibration position at the time of the vibration suppression evaluation of a spur gear in Example 11. FIG. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface. Explanatory drawing which shows an example of the shape of a non-bonding interface.

Explanation of symbols

1 Damping material for mechanical parts 2 Material 21 Surrounding part 22 Slide part 23 New surface 24 Non-bonding interface

Claims (20)

  Forming the above slide part by applying shear stress to the material hot or warm, and performing a half shear process, which is a shearing process that shifts the part of the material so as not to leave the surrounding part. The new surface generated by performing the descaling process, and then performing the fitting back process for returning the slide part to the original position in the cold state, which is in contact without metallic bonding A damping material for mechanical parts, characterized by having a bonding interface.   2. The vibration damping material for a machine part according to claim 1, wherein the non-bonding interface is independently formed on both surface sides along the shear stress applying direction and does not penetrate therethrough. 3.   A shearing process is performed to form a slide part that is displaced so that a part of the material is completely detached from the surrounding part by applying a shear stress to the material hot or warm, and the slide part is Descaling is performed on the new surface generated by forming, and then contacted without metallic bonding, formed by performing a fitting back process for returning the slide part to the original position in the cold. A damping material for machine parts, characterized by having a non-bonding interface.   The first part and the second part that can be fitted and coupled to the first part are formed by hot forging or warm forging, respectively, and the descaling process is performed on the portion that becomes the fitting surface. A machine having a non-bonding interface formed by performing a fitting and bonding process for fitting and bonding the first part and the second part in the cold without contacting them metallically. Damping material for parts.   5. The vibration damping material for a machine part according to claim 1, wherein the non-bonding interface is formed to penetrate both surfaces along the direction in which the shear stress is applied. .   6. The vibration damping material for a machine part according to claim 1, further comprising a welded portion obtained by welding a part of the boundary exposed portion of the non-bonding interface.   7. The vibration damping material for machine parts according to claim 6, wherein the welded portion is provided only on one surface of the damping material for machine parts.   The vibration damping material for mechanical parts according to any one of claims 1 to 7, wherein heat treatment is performed as a pre-process of the descaling process.   In any one of Claims 1-8, the said damping material for machine parts is a damping material for gears for forming the gear which has a damping characteristic, A ring-shaped or disk-shaped main-body part, A vibration damping material for machine parts, comprising a tooth mold forming portion provided on an outer peripheral side surface or an inner peripheral side surface, wherein the non-bonding interface is formed in an axial direction of the main body portion.   10. The vibration damping material for a machine part according to claim 1, wherein the non-bonding interface is formed in an annular shape.   11. The vibration damping material for a machine part according to claim 10, wherein the non-bonding interface is formed in a symmetrical shape.   11. The vibration damping material for a machine part according to claim 10, wherein the non-bonding interface is formed in a circular shape.   11. The vibration damping material for a machine part according to claim 10, wherein the non-bonding interface is formed in an asymmetric shape. A method of manufacturing a damping material for a machine part having a non-bonding interface that is in contact without being metallically bonded,
A slide part forming step for performing a half shear process, which is a shearing process for applying a shear stress to the material in a hot or warm state to form a slide part that is shifted so as not to leave a part of the material from the surrounding part;
A descaling process for removing the scale of the surface from the new surface generated by forming the slide part;
And a cold forging process for performing a fitting back process for returning the slide part to its original position in the cold. A method of manufacturing a damping material for a machine part having a non-bonding interface that is in contact without being metallically bonded,
A slide part forming step for performing a full shear process, which is a shearing process in which a shearing part is formed by applying a shear stress to the material hot or warm to form a slide part in which a part of the material is completely detached from the surrounding part; ,
Descaling processing to remove the scale of the surface from the new surface generated by forming the slide part,
And a cold forging process for performing a fitting back process for returning the slide part to its original position in the cold. A method of manufacturing a damping material for a machine part having a non-bonding interface that is in contact without being metallically bonded,
A joined part manufacturing process for forming a first part and a second part that can be fitted and joined to the first part in a hot or warm manner;
A descaling process that removes the scale of the surface of the mating surface;
A method for manufacturing a vibration damping material for mechanical parts, comprising: a cold forging step for fitting and coupling the first part and the second part in the cold.   The method of manufacturing a vibration damping material for mechanical parts according to any one of claims 14 to 16, further comprising a welding step of forming a welded portion by welding a part of the boundary exposed portion of the non-bonding interface. Method.   The method of manufacturing a vibration damping material for machine parts according to claim 17, wherein the welded portion is provided only on one surface of the vibration damping material for machine parts.   The method for manufacturing a vibration damping material for mechanical parts according to any one of claims 14 to 18, wherein a heat treatment is performed as a pre-process of the descaling process.   A machine part produced by processing the vibration damping material for a machine part according to any one of claims 1 to 13.

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