JP2019217585A - Joining device and joining method - Google Patents

Abstract

To provide a joining device that can accurately join a first member to a second joining member.SOLUTION: The joining device, which joins a first member to a second member having an insertion part for joining into which the first member is inserted, comprises; a first member holding part that holds the first member; a second member holding part that holds the second member; a first member insertion part that inserts the first member into the insertion part for joining, in interlock with the first member holding part or the second member holding part; a heating part that heats the second member; a thermal expansion regulating member that regulates thermal expansion of the second member toward the outside, in a surface orthogonal to an insertion direction in which the first member is inserted; and a movable holding part that movably holds at least either one of the first member holding part and the second member holding part along the insertion direction according to thermal expansion of the first member and the second member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joining device and a joining method.

  DESCRIPTION OF RELATED ART Conventionally, shrink fitting is known as a joining method which joins two joining objects of a 1st member and the 2nd member which has the insertion part for joining in which the 1st member is inserted (for example, patent document) 1).

  The shrink fit is to heat the second member in advance and thermally expand it to expand the diameter of the joining insertion portion, insert the first member in the expanded state, and reduce the diameter of the joining insertion portion during cooling. This is a technique for joining the two by utilizing them.

  In Patent Document 1, in an additional heating step after the first member is inserted into the joining insertion portion, the outward expansion of the second member is restricted in a plane orthogonal to the insertion direction in which the first member is inserted. There is described a technique for increasing the bonding strength between the first member and the second member by plastically deforming the inner diameter of the second member using a thermal expansion regulating member in a direction to reduce the inner diameter.

JP 2017-222000 A

  However, the technique of Patent Document 1 does not consider the influence of thermal expansion of the first member and the second member in the insertion direction. As a result, stress is generated along the insertion direction due to thermal expansion of the first member and the second member, and the first member buckles, the portion holding the first member slips, and the first member is damaged. Problems such as sticking or deformation of the second member may occur, and the accuracy of joining the first member and the second member was not good.

  The present invention has been made in view of the above, and an object of the present invention is to provide a joining apparatus and a joining method that can accurately join a first member and a second member.

  In order to solve the above problem and achieve the object, a joining device according to one embodiment of the present invention joins a first member and a second member having a joining insertion portion into which the first member is inserted. A first member holding portion for holding the first member, a second member holding portion for holding the second member, and interlocking with the first member holding portion or the second member holding portion. Then, a first member insertion section for inserting the first member into the joining insertion section, a heating section for heating the second member, and a plane orthogonal to the insertion direction for inserting the first member, A thermal expansion restricting member that restricts thermal expansion to the outside of the second member, and at least one of the first member holding portion or the second member holding portion, according to the thermal expansion of the first member and the second member. And a movable holding portion for holding the movable member along the insertion direction. The features.

  In addition, a joining device according to an aspect of the present invention includes a position detection unit that detects a position of the first member or the second member, and a position of the first member or the second member that is detected by the position detection unit. And a control unit that controls the holding force of the movable holding unit according to

  Further, in the joining device according to an aspect of the present invention, the control unit may be configured such that the first member insertion unit inserts the first member into the joining insertion unit, and the position detection unit includes the first member or the first member. Until it is detected that the position of the second member is a predetermined position, the movable holding unit holds the first member holding unit or the second member holding unit with a first holding force, and the position detection is performed. After the section has detected the predetermined position, the movable holding section holds the first member holding section or the second member holding section with a second holding force smaller than the first holding force. And

  Further, in the joining device according to an aspect of the present invention, the movable holding unit may hold the first member holding unit or the second member holding unit with the second holding force by an elastic force of an elastic body. Features.

  Further, the bonding device according to one aspect of the present invention is characterized in that the elastic force of the elastic body has a size that does not prevent the first member and the second member from thermally expanding.

  Further, in the joining device according to one aspect of the present invention, the movable holding unit includes a cylinder that holds the first member holding unit or the second member holding unit by a pressure of a fluid.

  Further, in the joining device according to one aspect of the present invention, the control unit controls the pressure of the fluid in the cylinder to reduce the holding force of the movable holding unit to the first holding force and the second holding force. Switching between force and force.

  Further, in the bonding apparatus according to an aspect of the present invention, the first holding force may be smaller than a force of the first member holding portion holding the first member, and the second member holding portion may be smaller than the second member holding portion. The second holding force is smaller than a force for holding the member, and the second holding force is a magnitude that does not prevent the first member and the second member from thermally expanding.

  Further, a joining method according to one embodiment of the present invention is a joining method of joining a first member and a second member having a joining insertion portion into which the first member is inserted, wherein the first member is attached to the first member. An arranging step of arranging, outside the second member, a thermal expansion regulating member that regulates thermal expansion to the outside of the second member in a plane orthogonal to the insertion direction in which the second member is inserted; A first heating step of heating the first member, an insertion step of inserting the first member into the joining insertion portion, and a first member holding section for holding the first member or a second member holding for holding the second member. A movable holding step of holding at least one of the parts movably in the insertion direction in accordance with the thermal expansion of the first member and the second member, and a second holding step of holding the second member higher than the first temperature. A second heating step of heating to a temperature. .

  ADVANTAGE OF THE INVENTION According to this invention, the joining device and the joining method which can join a 1st member and a 2nd member with high precision can be implement | achieved.

FIG. 1 is a schematic diagram showing a configuration of a joining device according to Embodiment 1 of the present invention. FIG. 2 is a flowchart showing a method of joining the first member and the second member using the joining device shown in FIG. FIG. 3 is a diagram illustrating a state in which the first member is inserted into the joining insertion portion in the joining device illustrated in FIG. 1. FIG. 4 is a diagram illustrating a state in which the movable holding unit holds the second member in the joining device illustrated in FIG. 1. FIG. 5 is a schematic diagram illustrating a configuration of a bonding apparatus according to Embodiment 2 of the present invention. FIG. 6 is a diagram illustrating a state in which the elastic body holds the second member in the joining device illustrated in FIG. 5. FIG. 7 is a schematic diagram illustrating a configuration of a joining device according to Embodiment 3 of the present invention. FIG. 8 is a diagram illustrating a state in which the air cylinder holds the second member in the joining device illustrated in FIG. 7. FIG. 9 is a schematic diagram showing a configuration of a joining device according to Embodiment 4 of the present invention. FIG. 10 is a diagram illustrating a state where the movable holding unit holds the second member in the joining device illustrated in FIG. 9.

  Hereinafter, embodiments of a bonding apparatus and a bonding method according to the present invention will be described with reference to the drawings. The present invention is not limited by these embodiments. INDUSTRIAL APPLICABILITY The present invention can be generally applied to a joining apparatus and a joining method for joining a rod-shaped first member and a second member having a joining insertion portion into which the first member is inserted.

  In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals as appropriate. Further, it is necessary to keep in mind that the drawings are schematic, and the dimensional relationships of the respective elements, the ratios of the respective elements, and the like may be different from actual ones. Even in the drawings, there may be cases where portions having different dimensional relationships and ratios are included.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a configuration of a joining device according to Embodiment 1 of the present invention. As shown in FIG. 1, a joining device 1 according to the first embodiment is a joining device that joins a first member 2 and a second member 3, and includes a first member holding unit 4 and a second member holding unit. A part 5, a first member insertion part 6, a holding part 7, a pedestal part 8, an electromagnetic induction heating coil 9 as a heating part, a thermal expansion regulating member 10, a movable holding part 11, a cylindrical member 12, , A control device 13. FIG. 1 shows a state before the first member 2 and the second member 3 are joined. FIG. 1 is a view of the joining apparatus 1 as viewed from the side. FIG. 1 is a partially cutaway view, and the cutout cross section is shown by hatching.

  The first member 2 is formed of a rod-like substantially cylindrical member. The first member 2 is made of, for example, a titanium alloy or the like.

The second member 3 is a substantially cylindrical member in which a joining insertion portion 3a, which is a cylindrical concave portion into which the first member 2 is inserted, is formed at one end. The second member 3 is made of, for example, an aluminum alloy (linear expansion coefficient α: about 25 × 10 ⁻⁶ / ° C.). A step 3b is formed at the center of the second member 3 in the insertion direction. The lower end of the step portion 3b is in contact with the upper end of the second member holding portion 5, and positions the second member 3 with respect to the second member holding portion 5.

  The first member 2 and the second member 3 are joined to each other with the first member 2 inserted into the joining insertion portion 3a. Hereinafter, the direction in which the first member 2 is inserted into the joining insertion portion 3a is referred to as an insertion direction A.

  The first member 2 and the second member 3 joined to each other are used, for example, in an ultrasonic treatment tool that applies ultrasonic energy to a living tissue to treat the living tissue. Specifically, the first member 2 and the second member 3 joined to each other apply the ultrasonic vibration generated by the ultrasonic vibrator from one end (the lower end in FIG. 1) to the other end in contact with the living tissue. (The upper end in FIG. 1).

[Structure of joining device]
Next, the configuration of the joining device 1 for joining the first member 2 and the second member 3 will be described.

  The first member holding section 4 holds the first member 2. Specifically, the first member holding portion 4 is a cylindrical member whose inner diameter is substantially equal to the outer diameter of the first member 2, and holds the first member 2 inserted inside.

  The second member holding section 5 holds the second member 3. Specifically, the second member holding portion 5 is a substantially cylindrical member having a second member insertion hole 5a, which is a cylindrical concave portion, formed at one end. The second member holding section 5 holds the second member 3 inserted into the second member insertion hole 5a. The bottom part 5b of the second member holding part 5 is in contact with a movable holding part 11 described later.

  The first member insertion part 6 moves in the insertion direction A in cooperation with the first member holding part 4 to move the first member holding part 4 holding the first member 2 in the insertion direction A, and moves the first member 2 to the second member 3. Into the joining insertion portion 3a. Further, the first member insertion portion 6 moves the first member holding portion 4 holding the first member 2 in a direction orthogonal to the insertion direction A, and inserts the first member 2 and the second member 3 into the joining insertion portion 3a. Align with. However, the first member insertion portion 6 may be configured to insert the first member 2 into the joining insertion portion 3a of the second member 3 in conjunction with the second member holding portion 5.

  The holding unit 7 holds the first member holding unit 4 and the first member insertion unit 6 that have gripped the first member 2.

  The pedestal portion 8 functions as a base for fixing the holding portion 7 and the cylindrical member 12.

  The electromagnetic induction heating coil 9 is wound around the outer peripheral surface of the thermal expansion regulating member 10 with a predetermined gap. The electromagnetic induction heating coil 9 indirectly heats the thermal expansion restricting member 10 by supplying a high-frequency current from a high-frequency power supply (not shown). However, a mechanism that directly heats the thermal expansion regulating member 10 and the second member 3 with hot air or the like may be provided as the heating unit.

The thermal expansion restricting member 10 restricts thermal expansion to the outside of the second member 3 in a plane orthogonal to the insertion direction A. The thermal expansion regulating member 10 is formed of a cylindrical member extending along the insertion direction A. The thermal expansion regulating member 10 is made of, for example, Kovar (linear expansion coefficient β: about 5 × 10 ⁻⁶ / ° C.). That is, the thermal expansion regulating member 10 is made of a material whose linear expansion coefficient β is smaller than the linear expansion coefficient α of the second member 3.

  The inner diameter of the thermal expansion regulating member 10 is set larger than the outer diameter of the second member 3 at room temperature. The dimension of the thermal expansion regulating member 10 in the height direction (direction along the insertion direction A) is a height that covers at least a part of the second member 3 where the joining insertion portion 3a is formed. It suffices if there is no particular limitation. Further, a through hole 10 a through which the first member 2 is inserted is formed at the upper end of the thermal expansion regulating member 10. The inner diameter of the through hole 10a is sufficiently larger than the outer diameter of the first member 2.

  The movable holding unit 11 holds the second member holding unit 5 movably along the insertion direction A in accordance with the thermal expansion of the first member 2 and the second member 3. However, the movable holding unit 11 may hold the first member holding unit 4 movably along the insertion direction A in accordance with the thermal expansion of the first member 2 and the second member 3. The movable holding unit 11 holds at least one of the first member holding unit 4 and the second member holding unit 5 by the elastic force of the elastic body. The movable holding unit 11 is, for example, a spring, but may be an elastic body such as an elastomer. The elastic force of the movable holding portion 11 is set to a sufficiently small size so as not to prevent the first member 2 and the second member 3 from thermally expanding.

  The cylindrical member 12 is formed of a substantially cylindrical member, and has an inner diameter substantially equal to the outer diameter of the second member holding portion 5, and regulates the movement of the second member holding portion 5 in a direction orthogonal to the insertion direction A.

  The control device 13 includes a position detection unit 13a that detects the position of the first member 2 or the second member 3, a control unit 13b that controls the entire joining device 1, and various programs for controlling the joining device 1. And a recording unit 13c for recording the same.

  The control unit 13b controls the driving of the first member insertion unit 6, and controls the first member holding unit 4, the second member holding unit 5, the electromagnetic induction heating coil 9, and the like. The control unit 13b is realized using a CPU (Central Processing Unit) having arithmetic and control functions, various arithmetic circuits, and the like.

  The recording unit 13c stores various programs for executing the operation of the joining device 1. The recording unit 13c is realized using a ROM (Read Only Memory), a RAM (Random Access Memory) that stores calculation parameters, data, and the like for each process.

(Joining method)
Next, a method of joining the first member 2 and the second member 3 using the joining device 1 will be described. FIG. 2 is a flowchart showing a method of joining the first member and the second member using the joining device shown in FIG.

  First, the worker holds the first member 2 by the first member holding unit 4 (Step S1: first holding step). Further, the worker holds the second member 3 by the second member holding unit 5 (Step S2: second holding step).

  Subsequently, the operator arranges the thermal expansion regulating member 10 outside the second member 3 (Step S3: arrangement step). Specifically, the worker places the thermal expansion regulating member 10 for regulating the thermal expansion to the outside of the second member 3 on the outside of the second member 3 in a plane orthogonal to the insertion direction A. It is arranged so that the center of 10 and the center of the second member 3 substantially match.

  Thereafter, the worker supplies a high-frequency current from a high-frequency power supply (not shown) to the electromagnetic induction heating coil 9 to induction-heat the thermal expansion regulating member 10. Then, the second member 3 disposed inside the thermal expansion regulating member 10 is heated to the first temperature by transmitting heat from the thermal expansion regulating member 10 (step S4: first heating step). .

  By performing Step S4, the thermal expansion regulating member 10 and the second member 3 thermally expand. Then, the inner diameter of the thermal expansion regulating member 10, the outer diameter of the second member 3, and the inner diameter of the joining insertion portion 3a gradually increase.

  Here, as described above, the linear expansion coefficient β of the thermal expansion restricting member 10 is smaller than the linear expansion coefficient α of the second member 3. Therefore, the outer diameter of the second member 3 changes more than the inner diameter of the thermal expansion regulating member 10. On the other hand, since the inner diameter of the joining insertion portion 3a is smaller than the outer diameter of the second member 3, the inner diameter changes more gently than the outer diameter.

  Then, in step S4, the operator induction-heats the thermal expansion regulating member 10 until the second member 3 reaches the first temperature. The first temperature is a temperature at which the inner diameter of the joining insertion portion 3a is larger than the outer diameter of the first member 2.

  Subsequently, the operator stops the supply of the high-frequency current from the high-frequency power supply (not shown) to the electromagnetic induction heating coil 9 (stops the induction heating of the thermal expansion regulating member 10 (the heating of the second member 3)), By operating the first member insertion portion 6, the first member 2 is inserted into the joining insertion portion 3a of the second member 3 so that the center axis of the second member 3 and the center axis of the first member 2 match. (Step S5: insertion step). FIG. 3 is a diagram illustrating a state in which the first member is inserted into the joining insertion portion in the joining device illustrated in FIG. 1. As shown in FIG. 3, the first member 2 is inserted into the joining insertion portion 3a.

  Thereafter, the worker holds the second member holding portion 5 so as to be movable in the insertion direction A by the movable holding portion 11 (step S6: movable holding step). Specifically, the movable holding portion 11 which is a spring abuts on the bottom 5b of the second member holding portion 5, and the second member holding portion 5 is moved in the insertion direction A by the thermal expansion of the first member 2 and the second member 3. Along the way.

  Subsequently, the worker supplies a high-frequency current from a high-frequency power supply (not shown) to the electromagnetic induction heating coil 9 and again induction-heats the thermal expansion regulating member 10 until the second member 3 reaches the second temperature (step). S7: Second heating step). Note that the second temperature is higher than the first temperature.

  When the second member 3 is heated to the second temperature in step S7, the second member 3 and the thermal expansion regulating member 10 thermally expand. Then, due to the difference between the linear expansion coefficients α and β of the second member 3 and the thermal expansion regulating member 10, when the temperature reaches the expansion regulating temperature Tx (a temperature smaller than the second temperature), the inner diameter of the thermal expansion regulating member 10 The outer diameter of the second member 3 matches (the outer peripheral surface of the second member 3 contacts the inner peripheral surface of the thermal expansion regulating member 10).

  Thereafter, in the process in which the second member 3 becomes higher than the expansion regulation temperature Tx, the second member 3 attempts to thermally expand, but is mechanically regulated by the inner peripheral surface of the thermal expansion regulation member 10. I have. For this reason, the second member 3 is moved in a direction not mechanically regulated by the thermal expansion regulating member 10, that is, in a direction in which the inner diameter of the joining insertion portion 3a is reduced, and in a height direction (the insertion direction A). Plastically deforms.

  When the inner diameter of the joining insertion portion 3a exceeds the expansion regulation temperature Tx, the inner diameter gradually decreases. The diameter of the joining insertion portion 3 a is reduced mechanically by the outer peripheral surface of the first member 2. That is, the inner diameter of the joining insertion portion 3 a finally matches the outer diameter of the first member 2.

  On the other hand, when the first member 2 and the second member 3 are plastically deformed in the height direction (the insertion direction A), the bottom portion 5b of the second member holding portion 5 moves downward, and the movable holding portion 11, which is a spring, contracts. . FIG. 4 is a diagram illustrating a state in which the movable holding unit holds the second member in the joining device illustrated in FIG. 1. As shown in FIG. 4, when the first member 2 and the second member 3 thermally expand, the bottom 5 b of the second member holding portion 5 presses the movable holding portion 11, and the movable holding portion 11 contracts along the direction B. . As a result, the first member 2 and the second member 3 are prevented from buckling or deforming when thermally expanding.

  Subsequently, the operator stops the supply of the high-frequency current from the high-frequency power supply (not shown) to the electromagnetic induction heating coil 9 (stops the induction heating of the thermal expansion regulating member 10 (the heating of the second member 3)), The thermal expansion regulating member 10 and the second member 3 are cooled to room temperature (Step S8).

  By the cooling in this step S8, the second member 3 and the thermal expansion regulating member 10 contract. Specifically, the inner diameter of the thermal expansion restricting member 10 gradually decreases in accordance with the contraction of the thermal expansion restricting member 10, and finally becomes the same inner diameter as before the execution of the joining method. Further, the outer diameter of the second member 3 gradually decreases in accordance with the contraction of the second member 3, and finally becomes an outer diameter smaller than the outer diameter before the execution of the joining method. Further, the inner diameter of the joining insertion portion 3a tends to gradually decrease in accordance with the contraction of the second member 3, but since the contraction is mechanically regulated by the outer peripheral surface of the first member 2, Finally, the inner diameter corresponding to the outer diameter of the first member 2 is maintained. Through the above steps, the first member 2 and the second member 3 are joined to each other.

  As described above, according to the first embodiment, the elastic force of the movable holding portion 11 that is an elastic body is a size that does not prevent the first member 2 and the second member 3 from thermally expanding. Buckling and deformation are prevented when the first member 2 or the second member 3 thermally expands, and the first member 2 and the second member 3 can be joined with high accuracy.

(Modification 1)
In the first embodiment, an example has been described in which the movable holding unit 11 holds the second member holding unit 5 with a constant holding force due to elastic force. However, the present invention is not limited to this. The movable holding unit 11 may hold the second member holding unit 5 with a holding force that changes with time under the control of the control unit 13b.

  The movable holding section 11 has a fixing section for fixing the position of the second member holding section 5 and an elastic body such as a spring.

  The control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a of the second member 3 and the position detection unit 13a determines that the position of the first member 2 or the second member 3 is predetermined. Until the position is detected, the movable holding unit 11 holds the first member holding unit 4 or the second member holding unit 5 with the first holding force, and the position detecting unit 13a is at the predetermined position. Is detected, the movable holding unit 11 causes the first member holding unit 4 or the second member holding unit 5 to be held with a second holding force smaller than the first holding force.

  Specifically, the control unit 13b adjusts the position of the second member holding unit 5 by the fixing unit of the movable holding unit 11 until the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a. After fixing, the second member holding portion 5 is held by the elastic body of the movable holding portion 11. That is, the first holding force is a holding force large enough to fix the position of the second member holding portion 5, and the second holding force is a holding force of the elastic body.

  As described above, until the first member 2 is inserted into the joining insertion portion 3a, the movable member 11 fixes the position of the second member holding portion 5 so that the first member 2 is inserted into the joining insertion portion 3a. At the time of insertion, the second member holding portion 5 moves along the insertion direction A due to a frictional force between the outer periphery of the first member 2 and the inner periphery of the joining insertion portion 3a, and joins the first member 2 together. Can be prevented from being properly inserted into the insertion section 3a.

(Embodiment 2)
FIG. 5 is a schematic diagram illustrating a configuration of a bonding apparatus according to Embodiment 2 of the present invention. As shown in FIG. 5, in the joining device 1A, the movable holding unit 11A includes an air cylinder 111 serving as a cylinder that holds the second member holding unit 5 by the pressure of the fluid, and the second member holding unit 5 is connected to the first member 2 and An elastic body 112 that is movably held in the insertion direction A in accordance with the thermal expansion of the second member 3.

  The air cylinder 111 has a shaft portion 111a that contacts the bottom 5b of the second member holding portion 5 to hold the second member holding portion 5, and an electromagnetic switching valve 111b that switches the air pressure inside the air cylinder 111. The air cylinder 111 is an air cylinder that switches the pressure of the compressed air introduced therein to adjust the force with which the shaft portion 111a presses the bottom 5b. However, the air cylinder 111 operates with a fluid other than air, such as gas or liquid. It may be.

  The elastic body 112 is, for example, a spring.

  The control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a of the second member 3, and the position detection unit 13a determines that the position of the first member 2 is a predetermined position. Until the position is detected, the movable holding portion 11 holds the second member holding portion 5 with the first holding force. After the position detection portion 13a detects a predetermined position, the movable holding portion 11 holds the second member holding portion 5. The portion 5 is held with a second holding force smaller than the first holding force. Specifically, the control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a, and the position detection unit 13a determines that the position of the first member 2 is a predetermined position. Until is detected, the second member holding portion 5 is held by the air cylinder 111 of the movable holding portion 11 with the first holding force, and thereafter, the second member holding portion 5 is attached to the elastic body 112 of the movable holding portion 11. The second holding force is smaller than the first holding force.

  As illustrated in FIG. 5, the control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a, and the position detection unit 13a determines that the position of the first member 2 is at a predetermined position. Until it is detected, the electromagnetic switching valve 111b is arranged at a position where the air pressure in the air cylinder 111 is increased. In this state, when the air pressure in the air cylinder 111 increases, the shaft portion 111a comes into contact with the second member insertion hole 5a of the second member holding portion 5, and the air cylinder 111 moves the second member holding portion 5 into the first member. Hold with the holding force of

  FIG. 6 is a diagram illustrating a state in which the elastic body holds the second member in the joining device illustrated in FIG. 5. As shown in FIG. 6, after the position detecting unit 13a detects that the position of the first member 2 is at the predetermined position, the control unit 13b does not increase the air pressure in the air cylinder 111 by switching the electromagnetic switching valve 111b. Switch to position. In this state, the air is exhausted without increasing the air pressure in the air cylinder 111, and the shaft portion 111a is retracted downward, so that the elastic body 112 holds the second member holding portion 5 with the second holding force. .

  As described above, until the first member 2 is inserted into the insertion portion 3a for joining, the first member 2 is inserted by the air cylinder 111 by holding the second member holding portion 5 with the first holding force. When inserted into the portion 3a, the frictional force between the outer periphery of the first member 2 and the inner periphery of the joining insertion portion 3a causes the second member holding portion 5 to move in the insertion direction A, and the first member 2 can be prevented from being properly inserted into the joining insertion portion 3a.

  On the other hand, after the first member 2 is inserted into the joining insertion portion 3a, the first member 2 or the second member 3 is held by the elastic body 112 holding the second member holding portion 5 with the second holding force. Buckling and deformation during thermal expansion are prevented.

(Embodiment 3)
FIG. 7 is a schematic diagram illustrating a configuration of a joining device according to Embodiment 3 of the present invention. As shown in FIG. 7, the air cylinder 11B as a movable holding unit in the joining device 1B holds the second member holding unit 5 by the pressure of the fluid.

  The air cylinder 11B includes a movable stage 11Ba on which the second member holding unit 5 holding the second member 3 is mounted, an electromagnetic switching valve 11Bb for switching the air pressure in the air cylinder 11B, a pressure control device 11Bc for controlling the air pressure, 11Bd. The pressure control device 11Bc has a high pressure setting, and the pressure control device 11Bd has a low pressure setting.

  The control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a of the second member 3, and the position detection unit 13a determines that the position of the first member 2 is a predetermined position. Until the position is detected, the movable holding portion 11 holds the second member holding portion 5 with the first holding force. After the position detecting portion 13a detects that the second member holding portion 5 is at a predetermined position, the movable holding portion 11 The two-member holding unit 5 is held with a second holding force smaller than the first holding force. Specifically, the control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a, and the position detection unit 13a determines that the position of the first member 2 is a predetermined position. Is detected by the air cylinder 11B until the second member holding portion 5 is held at the first holding force, and thereafter the second member holding portion 5 is held by the air cylinder 11B at the second holding force smaller than the first holding force. Hold by holding force.

  As shown in FIG. 7, the control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a, and the position detection unit 13a determines that the position of the first member 2 is at a predetermined position. Until it is detected that the air cylinder 11B is in contact with the pressure control device 11Bc by the electromagnetic switching valve 11Bb, the air pressure in the air cylinder 11B is increased. In this state, the movable stage 11Ba holds the second member holding portion 5 with the first holding force by increasing the pressure in the air cylinder 111.

  FIG. 8 is a diagram illustrating a state in which the air cylinder holds the second member in the joining device illustrated in FIG. 7. As shown in FIG. 8, after the position detector 13a detects that the position of the first member 2 is at the predetermined position, the controller 13b controls the air cylinder 111 by the electromagnetic switching valve 11Bb to the pressure controller 11Bd. Conduction is performed, and the air pressure in the air cylinder 11B is reduced. In this state, the movable stage 11Ba holds the second member holding portion 5 with the second holding force by reducing the air pressure in the air cylinder 111.

  As described above, the control unit 13b controls the pressure of the fluid in the cylinder by controlling the electromagnetic switching valve 11Bb, and reduces the holding force of the movable holding unit 11 to the first holding force and the second holding force. Switch between force and.

  The first holding force is smaller than the force by which the first member holding section 4 holds the first member 2 and smaller than the force by which the second member holding section 5 holds the second member 3. As a result, when the first member 2 is inserted into the insertion portion 3a for joining, the portion holding the first member 2 and the second member 3 slips and the first member 2 or the second member 3 is damaged. That has been prevented. Further, by appropriately setting the first holding force, when the first member 2 is inserted into the joining insertion portion 3a, the distance between the outer periphery of the first member 2 and the inner periphery of the joining insertion portion 3a is increased. It is possible to prevent the second member holding portion 5 from moving in the insertion direction A due to the frictional force, and preventing the first member 2 from being appropriately inserted into the joining insertion portion 3a.

  The second holding force has a magnitude that does not prevent the first member 2 and the second member 3 from thermally expanding. As a result, buckling or deformation is prevented when the first member 2 or the second member 3 thermally expands, and the first member 2 and the second member 3 can be joined with high accuracy.

(Embodiment 4)
FIG. 9 is a schematic diagram showing a configuration of a joining device according to Embodiment 4 of the present invention. As shown in FIG. 9, in the joining device 1 </ b> C, the first member insertion section 6 includes a fixing section 6 </ b> Ca that regulates movement of the first member holding section 4 holding the first member 2 in the insertion direction A, and a first section 6 </ b> C. And a movable holding portion 11C for holding the member holding portion 4 movably in the insertion direction A according to the thermal expansion of the first member 2 and the second member.

  The fixing portion 6Ca is, for example, a lock mechanism that regulates the movement of the first member insertion portion 6, and regulates the movement of the first member holding portion 4 in the insertion direction A.

  The movable holding portion 11C is a stopper for restricting the downward movement of the first member holding portion 4, and the first member is held by the second holding force which is the weight of the first member holding portion 4 holding the first member 2. The holding unit 4 is held.

  The control unit 13b determines that the first member insertion unit 6 inserts the first member 2 into the joining insertion unit 3a of the second member 3, and the position detection unit 13a determines that the position of the first member 2 is a predetermined position. Until the position is detected, the movement of the first member holding portion 4 in the insertion direction A is restricted by the fixing portion 6Ca, and after the position detection portion 13a detects that the position is the predetermined position, the restriction by the fixing portion 6Ca is performed. Is released, and the movable member 11C holds the first member holding portion 4 with the second holding force.

  According to the fourth embodiment, until the first member 2 is inserted into the joining insertion portion 3a, the fixing portion 6Ca restricts the movement of the first member holding portion 4 so that the first member 2 is inserted into the joining insertion portion 3a. When the first member 2 is inserted into the portion 3a, the second member holding portion 5 is moved in the insertion direction A by a frictional force between the outer periphery of the first member 2 and the inner periphery of the joining insertion portion 3a, and the first member 2 is moved. It is possible to prevent that it cannot be properly inserted into the joining insertion portion 3a. Further, the second holding force has a magnitude that does not prevent the first member 2 and the second member 3 from thermally expanding. As a result, buckling or deformation is prevented when the first member 2 or the second member 3 thermally expands, and the first member 2 and the second member 3 can be joined with high accuracy.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C Joining apparatus 2 1st member 3 2nd member 3a Insertion part 3b for joining 3b Step part 4 1st member holding part 5 2nd member holding part 5a 2nd member insertion hole 5b Bottom part 6 1st member insertion Part 6Ca fixing part 7 holding part 8 pedestal part 9 electromagnetic induction heating coil 10 thermal expansion regulating member 10a through hole 11, 11A, 11C movable holding part 11B, 111 air cylinder 11Ba movable stage 11Bb, 111b electromagnetic switching valve 11Bc, 11Bd pressure control Device 12 Cylindrical member 13 Control device 13a Position detecting unit 13b Control unit 13c Recording unit 111a Shaft unit 112 Elastic body

Claims (9)

A joining device for joining a first member and a second member having a joining insertion portion into which the first member is inserted,
A first member holding unit that holds the first member;
A second member holding unit that holds the second member;
A first member insertion portion that interlocks with the first member holding portion or the second member holding portion and inserts the first member into the joining insertion portion;
A heating unit for heating the second member;
A thermal expansion regulating member that regulates thermal expansion to the outside of the second member in a plane perpendicular to an insertion direction in which the first member is inserted;
A movable holding portion that holds at least one of the first member holding portion or the second member holding portion movably along the insertion direction in accordance with thermal expansion of the first member and the second member;
A joining device comprising: A position detection unit that detects a position of the first member or the second member;
A control unit that controls a holding force of the movable holding unit according to a position of the first member or the second member detected by the position detection unit;
The joining device according to claim 1, further comprising: The control unit includes:
Until the first member insertion section inserts the first member into the joining insertion section and the position detection section detects that the position of the first member or the second member is a predetermined position. Causing the movable holding portion to hold the first member holding portion or the second member holding portion with a first holding force,
After the position detection unit detects the predetermined position, the movable holding unit holds the first member holding unit or the second member holding unit with a second holding force smaller than the first holding force. The joining device according to claim 2, wherein:   The joining device according to claim 3, wherein the movable holding unit holds the first member holding unit or the second member holding unit with the second holding force by an elastic force of an elastic body.   The joining device according to claim 4, wherein the elastic force of the elastic body has a size that does not prevent the first member and the second member from thermally expanding.   The joining device according to claim 3, wherein the movable holding unit includes a cylinder that holds the first member holding unit or the second member holding unit by pressure of a fluid.   The said control part controls the pressure of the fluid in the said cylinder, and switches the holding force of the said movable holding part between the said 1st holding force and the said 2nd holding force, The Claims characterized by the above-mentioned. 7. The joining device according to 6. The first holding force is smaller than the force by which the first member holding portion holds the first member, and smaller than the force by which the second member holding portion holds the second member,
The said 2nd holding force is a magnitude | size which does not prevent that the said 1st member and the said 2nd member expand thermally, The joining apparatus of Claim 7 characterized by the above-mentioned. A joining method for joining a first member and a second member having a joining insertion portion into which the first member is inserted,
An arranging step of arranging a thermal expansion regulating member that regulates thermal expansion to the outside of the second member outside the second member in a plane orthogonal to an insertion direction of inserting the first member;
A first heating step of heating the second member to a first temperature;
An insertion step of inserting the first member into the joining insertion portion;
At least one of the first member holding portion holding the first member or the second member holding portion holding the second member is moved along the insertion direction in accordance with the thermal expansion of the first member and the second member. A movable holding step of holding the movable body;
A second heating step of heating the second member to a second temperature higher than the first temperature;
A joining method comprising:

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