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WO2018143333A1 - Procédé de soudage par friction linéaire et dispositif de soudage par friction linéaire - Google Patents

Procédé de soudage par friction linéaire et dispositif de soudage par friction linéaire Download PDF

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Publication number
WO2018143333A1
WO2018143333A1 PCT/JP2018/003390 JP2018003390W WO2018143333A1 WO 2018143333 A1 WO2018143333 A1 WO 2018143333A1 JP 2018003390 W JP2018003390 W JP 2018003390W WO 2018143333 A1 WO2018143333 A1 WO 2018143333A1
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WO
WIPO (PCT)
Prior art keywords
friction welding
linear friction
sliding
bonded interface
burrs
Prior art date
Application number
PCT/JP2018/003390
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English (en)
Japanese (ja)
Inventor
藤井　英俊
好昭 森貞
祥宏 青木
泰山　正則
元 村山
Original Assignee
国立大学法人大阪大学
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Filing date
Publication date
Application filed by 国立大学法人大阪大学 filed Critical 国立大学法人大阪大学
Publication of WO2018143333A1 publication Critical patent/WO2018143333A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding

Definitions

  • the present invention relates to a linear friction welding method and a linear friction welding apparatus for solid-phase joining metal materials.
  • LFW Liner Friction Welding
  • FSW Friction Stir Welding
  • Patent Document 1 Japanese Patent Laid-Open No. 2015-164738
  • one member is repeatedly moved relatively on the same locus in a state where one member is in contact with the other member, and the one member is In accordance with a stop command for relative movement of the one member with respect to the other member, and the one member becomes the other member from the generation of the stop command.
  • a friction welding apparatus comprising stop means for stopping relative movement of the one member relative to the other member during a period until the locus is relatively moved once.
  • Patent Document 1 shortens the time taken from the generation of a stop command to the stop of the actuator and controls the friction welding amount, and the minimum friction welding amount is sufficient. It is not intended to form a joint having a good joint characteristic.
  • an object of the present invention is to provide a simple linear friction welding method and linear friction welding capable of forming a good joint while minimizing the amount of burr discharged. To provide an apparatus.
  • the present inventor pays attention to the situation where burrs are discharged as a result of intensive research on the observation method for confirming the progress of the joining process and the appropriate stop timing of sliding. Has been found to be extremely effective, and the present invention has been achieved.
  • the present invention A first step of bringing one member into contact with the other member to form a bonded interface; In a state where a pressure is applied substantially perpendicularly to the interface to be joined, the one member and the other member are repeatedly slid on the same locus, and are substantially parallel and substantially perpendicular to the sliding direction.
  • a third step of stopping the sliding to form a joint surface In the second step, the bonded interface is observed from a direction substantially perpendicular to the sliding direction, and at the moment when the burr is discharged substantially parallel to the sliding direction, the third step is performed. Performing said stop in the process; A linear friction joining method is provided.
  • Fig. 1 shows a schematic diagram showing the situation during linear friction welding.
  • Linear friction welding is solid-phase bonding in which friction heat generated when the materials to be joined are rubbed together by linear motion is the main heat source.
  • the material softened by the temperature rise is discharged as burrs from the interface to be joined, so that the oxide film formed on the interface to be joined is removed and the new surfaces are brought into contact with each other to join the joint. Is supposed to be obtained.
  • the present inventor has observed in detail the discharge amount, direction and order of burrs during the joining process of linear friction welding, and the first burrs are discharged from the joined interface in a direction substantially perpendicular to the sliding direction. After that, it was clarified that the gas was subsequently discharged from a substantially parallel direction. Generally speaking, the burr discharge direction at the initial stage of joining is substantially parallel to the sliding direction, but actually a different phenomenon occurs. In this specification, “sliding direction and substantially perpendicular direction” and “sliding direction and substantially parallel direction” are both directions substantially perpendicular to the applied pressure.
  • the temperature distribution of the bonded interface has a great influence on the direction and order in which burrs are discharged from the bonded interface.
  • the materials to be joined are constantly in contact with each other at the center of the interface to be joined, and frictional heat is easily stored.
  • the material to be joined is first softened in the region, and burrs are discharged from the “sliding direction and substantially perpendicular direction” that is the shortest distance from the region.
  • the present invention also provides: A first step of bringing one member into contact with the other member to form a bonded interface; In a state where a pressure is applied substantially perpendicularly to the interface to be joined, the one member and the other member are repeatedly slid on the same locus, and are substantially parallel and substantially perpendicular to the sliding direction. A second step of discharging burrs from the bonded interface; A third step of stopping the sliding to form a joint surface, In the second step, the bonded interface is observed from a direction substantially perpendicular to the sliding direction, and the burrs discharged substantially perpendicular to the sliding direction are at both ends of the bonded interface. Performing the stop in the third step at the moment of reaching A linear friction joining method is also provided.
  • the bonded interface is observed from a direction substantially perpendicular to the sliding direction, and the burrs discharged substantially perpendicular to the sliding direction reach the both ends of the bonded interface at the moment.
  • the amount of burrs discharged is slightly larger compared to the case where the burrs are stopped at the moment when the burrs are discharged almost parallel to the sliding direction, but the oxide is more reliably Can be achieved.
  • the moment when the burrs discharged substantially perpendicular to the sliding direction reach both ends of the bonded interface. It can be easily grasped. Specifically, since the bonded interface emits light as burrs are discharged, it is only necessary to observe the moment when the emitted light reaches both ends of the bonded interface.
  • the bonded interface is square or rectangular.
  • the method for determining the timing to stop sliding by observing the discharge of burrs can be applied to the materials to be joined having various shapes, but if the interface to be joined is square or rectangular, the direction of burrs discharge In addition, the discharge timing can be more easily observed.
  • the sliding direction is a substantially short direction of the one member and / or the other member.
  • the area of the bonded interface that is constantly in contact during the sliding process as compared to the case where the sliding direction is the substantially short direction of one member and / or the other member, compared to the case where the sliding direction is substantially the longitudinal direction. Becomes smaller. That is, the temperature gradient caused by the generation of frictional heat and heat removal is larger when sliding in a substantially short direction, and as a result, the direction dependency in which burrs are discharged becomes more prominent. It is possible to more easily observe the discharge of burrs as an index for stopping.
  • the one member and / or the other member is an iron-based metal, titanium, or a titanium alloy.
  • the one member and / or the other member is an iron-based metal, titanium, or titanium alloy.
  • the present invention also provides: One member is brought into contact with the other member to form a bonded interface, and then the one member and the other member are moved in the same locus while pressure is applied substantially perpendicularly to the bonded interface.
  • a linear friction welding device that repeatedly slides on and stops the sliding after discharging burrs from the bonded interface, An observation device for observing the bonded interface from a direction substantially perpendicular to the sliding direction;
  • a linear friction welding apparatus is also provided.
  • linear friction welding apparatus of the present invention it is preferable to further include an observation apparatus for observing the bonded interface from a direction substantially parallel to the sliding direction.
  • the observation device is a high-speed video camera.
  • a high-speed video camera By using a high-speed video camera, it is possible to accurately grasp the discharge timing of burrs and the like that are difficult to measure with the naked eye.
  • FIG. 2 is a schematic diagram showing a joining process of linear friction joining according to the present invention.
  • a first step in which one member 2 is brought into contact with the other member 4 to form a bonded interface 6 and a state in which pressure is applied substantially perpendicular to the bonded interface 6 Then, the second member 4 and the other member 4 are repeatedly slid on the same locus, and the burr 8 is discharged from the bonded interface substantially parallel and substantially perpendicular to the sliding direction, and sliding is performed.
  • a third step of stopping and forming a joint surface will be described in detail.
  • the first step is a step in which one member 2 is brought into contact with the other member 4 to form a bonded interface 6.
  • the one member 2 and / or the other member 4 are moved to a place where the formation of the joining portion is desired, the joined surfaces are brought into contact with each other, and the joined interface 6 is formed.
  • the material of the one member 2 and the other member 4 is not particularly limited as long as the effects of the present invention are not impaired, and may have a metal phase that can be joined by linear friction welding. Or it is preferable that it is a titanium alloy.
  • a titanium alloy By using one member 2 and / or the other member 4 of an iron-based metal, titanium, or titanium alloy, it is possible to easily confirm the generation of burrs 8 or the light emission associated with the generation of burrs 8.
  • an iron-type metal means the metal which mainly has iron in a composition, For example, various steel, cast iron, etc. are contained.
  • the present invention can be achieved by using one member 2 and / or the other member 4 as these metal materials. The linear friction welding can be used more accurately.
  • the shape and size of the one member 2 and the other member 4 are not particularly limited as long as the effects of the present invention are not impaired. Any desired pressurization and vibration can be realized by the linear friction welding apparatus.
  • the bonded interface 6 is preferably a square or a rectangle.
  • the method of determining the timing of stopping the sliding by observing the discharge of the burr 8 can be applied to the material to be joined having various shapes. However, when the interface 6 to be joined is square or rectangular, the second In the process, the discharge direction and discharge timing of the burr 8 can be more easily observed.
  • (1-2) Second Step In the second step, one member 2 and the other member 4 are repeatedly slid on the same locus in a state where pressure is applied substantially perpendicularly to the bonded interface 6. This is a step of discharging the burrs 8 from the bonded interface 6 substantially parallel and substantially perpendicular to the sliding direction.
  • the method of repeatedly sliding one member 2 and the other member 4 on the same trajectory is not particularly limited as long as the effect of the present invention is not impaired. Even if both members are vibrated together, one is fixed. Then, the other may be vibrated. Further, the process conditions (applied pressure, vibration frequency, amplitude, etc.) of linear friction welding are not particularly limited, and may be set as appropriate according to the material, shape, size, etc. of the materials to be joined.
  • the sliding direction is set to one member 2 and / or the other member 4. It is preferable that the direction is substantially short. Compared with the case where the longitudinal direction is substantially the longitudinal direction by setting the sliding direction to be the substantially short direction of the one member 2 and / or the other member 4, the bonded interface that is constantly in contact during the sliding process. The area of 6 becomes smaller. That is, the temperature gradient caused by the generation of frictional heat and heat removal is larger when sliding in a substantially short direction, and as a result, the direction dependency in which the burrs 8 are discharged becomes more prominent. It is possible to more easily observe the discharge of the burr 8 as an index for stopping the operation.
  • the discharge behavior of the burr 8 in the second process is grasped by observing the bonded interface 6 from a direction substantially perpendicular to the sliding direction.
  • the observation method is not particularly limited, for example, by using a high-speed video camera and using a frame rate of about 2500 fps, it is possible to accurately know the behavior in which the burrs 8 are discharged.
  • the third step is a step of forming a joint surface by stopping sliding in the second step.
  • the sliding between the one member 2 and the other member 4 is stopped, thereby joining. Can be completed.
  • the bonded interface 6 is observed from a direction substantially perpendicular to the sliding direction, and the sliding is stopped at the moment when the burr 8 is discharged substantially parallel to the sliding direction. As a result, it is possible to form a good bonded portion while minimizing the discharge amount of the burr 8 (minimizing consumption of the material to be bonded).
  • the bonded interface 6 is observed from a direction substantially perpendicular to the sliding direction, and the burr 8 discharged substantially perpendicular to the sliding direction reaches the both ends of the bonded interface 6 at the moment.
  • the amount of discharge of the burr 8 is slightly larger than that when the burr 8 is stopped at the moment when the burr 8 is discharged substantially parallel to the sliding direction, but more reliably. Oxide removal and the like can be achieved.
  • the burrs 8 discharged substantially perpendicular to the sliding direction reached both ends of the bonded interface 6.
  • linear friction welding apparatus of this invention is comprised from the main-body part and the observation part, and a main-body part is the same as that of a conventionally well-known general linear friction welding apparatus.
  • a main-body part is the same as that of a conventionally well-known general linear friction welding apparatus.
  • the observation unit includes an observation device for observing the bonded interface 6 from a direction substantially perpendicular to the sliding direction of the one member 2 and the other member 4, and the burr 8 during the bonding process is provided. Emission can be observed.
  • the linear friction welding method of the present invention can be sufficiently executed only by an observation device arranged in a direction substantially perpendicular to the sliding direction, but the direction substantially parallel to the sliding direction.
  • more accurate observation can be realized by arranging an observation device.
  • the discharge state of the burr 8 is observed by an observation device, and the moment when the burr 8 is discharged substantially parallel to the sliding direction or substantially perpendicular to the sliding direction. It is preferable to have a program that automatically stops sliding at the moment when the burr 8 discharged to the both ends of the interface 6 to be joined is reached. By measuring the time until, it can be set as the joining time of joining on the same conditions after the next time.
  • the linear friction welding apparatus of the present invention it is preferable to use a high-speed video camera as an observation apparatus.
  • a high-speed video camera By using a high-speed video camera, it is possible to accurately observe the discharge timing and discharge state of the burr 8.
  • the specifications of the high-speed video camera are not particularly limited as long as the effects of the present invention are not impaired, but for example, the observation frame rate is preferably 100 to 10,000 fps, and more preferably 125 to 5000 fps. . By setting the frame rate to these values, it is possible to accurately observe the discharge timing of the burr 8.
  • the observation device for example, a photo sensor or a line sensor can be used in addition to the high-speed video camera.
  • the linear friction welding apparatus of the present invention preferably includes a mirror for observing the discharge state of the burr 8. By arranging the mirror at an appropriate position, it is possible to accurately observe the discharge timing and discharge state of the burr 8.
  • Example 1 A 20 mm ⁇ 20 mm ⁇ 65 mm titanium alloy (Ti-6Al-4V) was used as the material to be bonded, and linear friction bonding was performed using a 20 mm ⁇ 20 mm surface as a bonding surface.
  • linear friction welding was performed by a method in which one material to be joined was fixed and the other material to be vibrated, and the frequency was 50 Hz, the amplitude was ⁇ 2 mm, and the applied pressure was 50 MPa.
  • FIG. 3 shows an image obtained by observing the bonded interface from a direction substantially perpendicular to the sliding direction at a frame rate of 2500 fps using a high-speed video camera.
  • the discharge of burrs is started from a direction substantially perpendicular to the sliding direction.
  • no burrs are discharged from a direction substantially parallel to the sliding direction.
  • 1.2 seconds have elapsed from the start of joining
  • a large amount of burrs are discharged from both directions substantially perpendicular and substantially parallel to the sliding direction. Note that by observing the burr discharge state in FIG. 3, it was easy to grasp the moment when the burr discharge reached both ends of the bonded interface.
  • FIG. 4 shows an image obtained by observing the bonded interface from a direction substantially parallel to the sliding direction at a frame rate of 2500 fps using a high-speed video camera.
  • a substantially parallel direction it is difficult to confirm the emission of burrs from a substantially vertical direction clearly observed when observed from a substantially vertical direction in an image 0.2 seconds after the start of bonding. is there.
  • the discharge of burrs in the vertical direction can be confirmed 0.5 seconds after the start of joining, but at this stage, the discharge of burrs is also started in a substantially parallel direction. After 1.1 seconds, only the length of the burrs discharged from the substantially vertical direction and the substantially parallel direction is increased, and no other particular change is observed. From FIG. 4, it was difficult to grasp the moment when the burr discharge reached both ends of the bonded interface.
  • the bonded interface is slid. It can be seen that it is necessary to observe from a direction substantially perpendicular to the direction of movement.
  • Example 2 Linear friction welding was performed in the same manner as in Example 1 except that the frequency was 15 Hz and the applied pressure was 200 MPa.
  • Example 2 using a high-speed video camera, the bonded interface was observed from a direction substantially perpendicular to the sliding direction. Since burrs were discharged from a direction substantially parallel to the direction, the vibration (sliding) was stopped in 3 seconds.
  • Example 3 Linear friction welding was performed in the same manner as in Example 2 except that the vibration (sliding) was stopped in 3.5 seconds. Note that 3.5 seconds is the moment when the burr discharge reaches both ends of the bonded interface.
  • FIG. 5 shows cross-sectional photographs of the joints obtained in Examples 2 and 3 and Comparative Examples 1 to 4.
  • Comparative Example 1 (1 s in FIG. 5) and 2 (2 s in FIG. 5) with a short joining time, an unjoined portion is confirmed, but Example 2 (3 s in FIG. 5), 3 (in FIG. 5) In 3.5 s) and Comparative Example 3 (3.75 s in FIG. 5) and 4 (4 s in FIG. 5), good joints without defects are formed.
  • the thickness of the joint is almost the same, but in Comparative Examples 3 and 4, it can be seen that the joint is shortened.
  • FIG. 6 shows the tensile strengths of the joints obtained in Examples 2 and 3 and Comparative Examples 1, 2, and 4.
  • the joints obtained in Comparative Examples 1 and 2 having a short joining time had lower strength than other conditions, but in Examples 2, 3 and Comparative Example 4, the base material was broken, and the strength was almost the same.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

L'invention concerne un procédé de soudage par friction linéaire simple et un dispositif de soudage par friction linéaire qui permettent de réduire au minimum la quantité de bavures évacuée, tout en formant des joints appropriés. Ledit procédé comprend une première étape dans laquelle un élément (2) est mis en contact avec un autre élément (4) pour former une interface à souder (6), une deuxième étape dans laquelle, au moyen d'une pression appliquée approximativement perpendiculairement à l'interface à souder (6), un élément (2) et un autre élément (4) sont amenés à coulisser de façon répétée sur le même trajet, évacuant des bavures (8) de l'interface à souder, approximativement en parallèle avec la direction de coulissement et approximativement perpendiculaire à celle-ci, et une troisième étape dans laquelle le coulissement est arrêté, formant une surface de soudage, et est caractérisé en ce que, dans la deuxième étape, l'interface à souder (6) est observé à partir d'une direction approximativement perpendiculaire à la direction de coulissement et en ce que l'arrêt est exécuté dans la troisième étape au moment où des bavures (8) sont évacuées approximativement en parallèle avec la direction de coulissement.
PCT/JP2018/003390 2017-02-02 2018-02-01 Procédé de soudage par friction linéaire et dispositif de soudage par friction linéaire WO2018143333A1 (fr)

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JP2017017995A JP6796839B2 (ja) 2017-02-02 2017-02-02 線形摩擦接合方法及び線形摩擦接合装置

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Cited By (4)

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CN111639448A (zh) * 2020-05-06 2020-09-08 西北工业大学 一种引入初始缺陷的线性摩擦焊接数值模拟方法
CN112756889A (zh) * 2021-01-17 2021-05-07 西北工业大学 一种线性摩擦焊接夹具
US11276629B2 (en) 2019-08-02 2022-03-15 Kabushiki Kaisha Toshiba Semiconductor device
CN114206535A (zh) * 2019-08-07 2022-03-18 国立大学法人大阪大学 异种材料固相接合方法及异种材料固相接合构造物

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11276629B2 (en) 2019-08-02 2022-03-15 Kabushiki Kaisha Toshiba Semiconductor device
CN114206535A (zh) * 2019-08-07 2022-03-18 国立大学法人大阪大学 异种材料固相接合方法及异种材料固相接合构造物
CN114206535B (zh) * 2019-08-07 2024-04-02 国立大学法人大阪大学 异种材料固相接合方法及异种材料固相接合构造物
CN111639448A (zh) * 2020-05-06 2020-09-08 西北工业大学 一种引入初始缺陷的线性摩擦焊接数值模拟方法
CN112756889A (zh) * 2021-01-17 2021-05-07 西北工业大学 一种线性摩擦焊接夹具
CN112756889B (zh) * 2021-01-17 2022-11-29 西北工业大学 一种线性摩擦焊接夹具

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