JP2010069488A - Method and structure for holding by caulking and caulking machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve holding force for holding a member to be held by making residual axial force in the base part of a caulked workpiece larger. <P>SOLUTION: A caulking stage and a pressure application stage to a bearing holder 8 are performed at the same time and, furthermore, with individual rollers 24, 26. Thus, the formation of the caulked part and the improvement of residual axial force in the peripheral wall part 8c are not restricted by each other because the caulking with the caulking roller 24 and the pressure application with the pressure application roller 26 for increasing the amount of plastic deformation are independently performed. Then, the durability of a formed holding structure by caulking is higher and the holding structure by caulking having satisfactory residual axial force is obtained because the setting of the holding force of the bearing is performed at high degree of freedom without being greatly affected by the caulking. A mechanism for attaching the bearing to the inside of a bearing holder 8 with bolts or the like is made unnecessary and a whole actuator and a whole internal combustion engine to which the actuator is applied are miniaturized. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention revolves a caulking roller supported rotatably so as to revolve around the axis of the cylindrical workpiece and caulks the cylindrical workpiece to bend the end portion of the cylindrical workpiece to the inner peripheral side. The caulking holding method, the caulking holding structure, and the caulking processing machine for holding the held member along the work base inside the work by the clamping force of the caulking part.

  2. Description of the Related Art A rotation-linear motion conversion actuator is known that has an internal combustion engine or the like as a driving target device and is attached to apply a linear motion driving force thereto (see, for example, Patent Documents 1 and 2). These patent documents 1 and 2 are disclosing the rotation-linear motion conversion actuator which drives the valve lift apparatus of an internal combustion engine. A rotating body is rotatably supported through a bearing in the main body case of the rotation / linear motion converting actuator. This rotating body is rotated by a motor drive, and this causes the screw shaft to move linearly and move in the axial direction, thereby driving the valve lift device.

  In Patent Documents 1 and 2, in order to fix a bearing for rotatably supporting a rotating body in the housing, an annular support member is arranged inside the housing, and this support member is bolted to the inner surface of the housing. Yes.

Since the annular support member for fixing the bearing is arranged inside the housing and fastened with bolts in this way, the physique of the housing is easily increased in size. A method of supporting the bearing by combining this with caulking (for example, see Patent Documents 3 and 4) can be considered.
Japanese Unexamined Patent Publication No. 2007-303408 (5th page, FIG. 1) JP 2007-303479 A (5th page, FIG. 2) JP 2000-38005 A (page 2-3, FIG. 1) JP 2003-83353 A (page 6-7, FIG. 1)

  However, when holding a member to be held such as a bearing that requires a certain level of clamping force with the housing, the holding force for holding may be insufficient if the housing is simply crimped and clamped. That is, even if the pressure during caulking is increased to increase the clamping force by the caulking portion of the housing, most of the increase in pressure is caused by plastic deformation in the radial direction perpendicular to the axial direction at the caulking portion. It contributed to the increase. This has caused a problem that the residual axial force of the housing, which should finally play a role of generating the clamping force, cannot be sufficiently increased.

  SUMMARY OF THE INVENTION An object of the present invention is to improve a clamping force for holding a member to be held by increasing a residual axial force at a base portion of a workpiece subjected to caulking.

In the following, means for achieving the above object and its effects are described.
In the caulking and holding method according to claim 1, the end of the cylindrical work is squeezed by revolving a caulking roller supported so as to rotate about the axis of the cylindrical work and caulking the cylindrical work. A caulking holding method for forming a caulking portion by bending to the circumferential side, and holding a member to be held along the work base inside the work by a clamping force of the caulking portion, as the cylindrical work, in the vicinity of the caulking portion Using a ring-shaped corner portion projecting to the outer peripheral side formed on the workpiece base, the caulking process step by the caulking process roller and the pressure application supported so as to be able to rotate independently of the caulking process roller A pressure applying step of applying a pressure in the same direction as the clamping force direction to the ring-shaped corner by the pressure applying roller by revolving the roller around the axis of the cylindrical workpiece; Characterized in that it run.

  The end portion of the cylindrical workpiece is simply bent by caulking with a caulking roller to form the caulking portion, and the pressure applying step is executed by the pressure applying roller. This pressure applying step applies pressure in the same direction as the holding force direction of the held member to the ring-shaped corner formed on the outer peripheral side of the cylindrical workpiece.

  In the caulking process, when the caulking part is formed, the work base part, which is not bent, also undergoes plastic deformation as well as elastic deformation due to the pressure during caulking process. This causes a difference in the amount of elastic deformation between the held member and this becomes a residual axial force.

  In the present invention, the pressure applying step is further performed by the pressure applying roller. For this reason, a pressure in the same direction as the clamping force direction is applied to the workpiece base separately from the caulking process, and this increases the amount of plastic deformation in the workpiece base. Since the amount of elastic deformation at the workpiece base decreases corresponding to the increase in the amount of plastic deformation, the difference in the amount of elastic deformation with the held member becomes larger than that in the case of only caulking, and the workpiece base The residual axial force is increased.

Thus, the residual axial force of the cylindrical workpiece subjected to the caulking process can be increased, and the clamping force for holding the held member can be improved.
In particular, the pressure applying step is performed by a pressure applying roller supported separately from the caulking roller used in the caulking step. For this reason, it is possible to independently perform the caulking process using the caulking process roller and the pressure application using the pressure applying roller for increasing the plastic deformation amount. For this reason, it is possible to process in a desired state without mutually restricting the formation of the caulking portion and the improvement of the residual axial force, and it is possible to increase the degree of freedom of caulking retention, so that the durability is high and sufficient residual A caulking holding method capable of realizing a caulking holding structure for axial force can be provided.

  The caulking holding method according to claim 2 is the caulking holding method according to claim 1, wherein the caulking processing roller and the pressure applying roller are revolved at different phase positions around the axis of the cylindrical workpiece. Thus, the caulking process step and the pressure applying step are performed simultaneously.

  Thus, even if the caulking pressure and the applied pressure are simultaneously applied to the cylindrical workpiece, the pressure can be distributed around the axis of the cylindrical workpiece. For this reason, even if the caulking process step and the pressure applying step are simultaneously performed, the caulking portion can be formed with high accuracy on the cylindrical workpiece, and sufficient residual axial force is uniformly generated around the axis of the cylindrical workpiece. Can do.

  In the caulking holding method according to claim 3, in the caulking holding method according to claim 2, a plurality of the caulking rollers are revolved at equal phase intervals around the axis of the cylindrical workpiece, and a plurality of the pressures are obtained. The application roller is revolved around the axis of the cylindrical workpiece at equal phase intervals, and the caulking process and the pressure application process are performed simultaneously.

  By arranging the plurality of caulking rollers and the plurality of pressure applying rollers at equal phase intervals in this way, the pressure can be uniformly distributed around the axis of the cylindrical workpiece. Thus, the caulking portion can be formed with higher accuracy, and a sufficient residual axial force can be more uniformly generated around the axis of the cylindrical workpiece.

  The caulking holding method according to claim 4 is the caulking holding method according to claim 3, wherein the two caulking rollers revolve around the axis of the cylindrical workpiece at equal phase intervals, and the two pressures The caulking process and the pressure applying process are performed simultaneously by causing the applying roller to revolve with an equal phase interval around the axis of the cylindrical workpiece and a 90 ° phase difference from the caulking process roller. It is characterized by that.

  By using two caulking rollers and two pressure-applying rollers in this way and providing a phase difference of 90 ° between the caulking roller and the pressure-applying roller at equal phase intervals, a small number of rollers are provided. Even with a roller, a caulking portion can be formed with high accuracy on a cylindrical workpiece, and a sufficient residual axial force can be generated uniformly around the axis of the cylindrical workpiece.

  In the caulking holding method according to claim 5, in the caulking holding method according to any one of claims 1 to 4, the caulking processing step and the pressure applying step are each independently pressure applied to the cylindrical workpiece. Is adjusted.

  In addition to the fact that the caulking roller and the pressure applying roller are independent, pressure adjustment for caulking by the caulking roller and application pressure adjustment by the pressure applying roller to increase the amount of plastic deformation are further performed. By performing it independently, it is possible to adjust the formation of the caulking portion and the improvement of the residual axial force to a desired state with a higher degree of freedom.

  In the caulking and holding method according to claim 6, in the caulking and holding method according to any one of claims 1 to 5, after the caulking process is started first, the pressure applying process is performed during the caulking process. The caulking process step and the pressure applying step are executed simultaneously by starting the process.

  Even when the caulking process and the pressure applying process are executed together in this way, the end of the cylindrical workpiece is moved to the caulking process roller before the pressure applying process by starting the caulking process first. Can be fixed so as not to move to the outer peripheral side. Therefore, since the applied pressure is applied to the ring-shaped corner portion that protrudes to the outer peripheral side in the pressure applying step thereafter, the position of the end portion of the cylindrical workpiece is not easily shifted during the pressure applying step.

  As a result, even if the caulking step and the pressure applying step are finally performed at the same time, the caulking portion can be formed on the cylindrical workpiece with high accuracy, and a sufficient residual axial force can be evenly distributed around the axis of the cylindrical workpiece. Can be generated.

  In the caulking and holding method according to claim 7, in the caulking and holding method according to any one of claims 1 to 6, the held member is a bearing, and the cylindrical workpiece can be rotated by the bearing. It is the housing which accommodates the rotation member arrange | positioned inside, or a bearing holder arrange | positioned in this housing.

  Thus, the present invention can be applied to hold the bearing in the housing or the bearing holder, and the difference in the amount of elastic deformation in the axial direction between the bearing and the housing or the bearing holder can be increased more than usual. For this reason, the residual axial force in the housing or the bearing holder is increased as compared with a normal caulking process, and it is possible to realize the caulking holding with improved clamping force for holding the bearing.

  In addition, the formation of the caulking portion in the housing or the bearing holder and the improvement of the residual axial force can be adjusted to a desired state without being mutually restricted, and the degree of freedom of caulking retention can be increased, so durability is improved. A high and sufficient residual axial force caulking holding structure can be realized.

  In this way, it is possible to hold and improve the clamping force with a high durability and sufficient residual axial force without separately preparing a mechanism for mounting the bearing in the housing or the bearing holder with a bolt or the like. The entire housing or bearing holder can be reduced in size.

  In the caulking and holding method according to claim 8, in the caulking and holding method according to claim 7, the bearing and the housing or the bearing holder are a bearing and a housing or a bearing holder in a rotation-linear motion conversion actuator, The rotation-linear motion conversion actuator has a rotating member disposed in the housing or the bearing holder attached to the device to be driven so as to be rotatable via the bearing, and the rotation of the rotating member causes the axial direction of the cylindrical workpiece to move. An output shaft that moves to the drive object is arranged in a state of protruding outward from the housing, and a driving force is transmitted from the output shaft to the device to be driven.

  The present invention can be applied to the manufacture of such a rotation-linear motion conversion actuator. As a result, a large residual axial force can be set in the housing or the bearing holder, and the bearing can be sufficiently retained with high durability by caulking. For this reason, the rotation-linear motion conversion actuator can be reduced in size, and further, the entire drive target device can be reduced in size.

  In the caulking and holding method according to claim 9, in the caulking and holding method according to claim 8, the rotating member is a nut of a planetary differential screw type rotation-linear motion conversion mechanism, and the output shaft is a sun shaft. Since a planetary shaft is disposed between the nut and the sun shaft, rotation-linear motion conversion is performed by a meshing mechanism between the sun shaft, the planetary shaft, and the nut formed in the nut. It is characterized by that.

The rotation-linear motion conversion actuator may be configured as such a planetary differential screw type rotation-linear motion conversion mechanism, and the same operation and effect as in claim 8 are produced.
The caulking holding method according to claim 10 is characterized in that, in the caulking holding method according to claim 8 or 9, the device to be driven is an internal combustion engine.

As a result, the entire internal combustion engine can be reduced in size.
The caulking holding structure according to claim 11 is formed in the cylindrical workpiece by performing the caulking process step and the pressure applying step by the caulking holding method according to any one of claims 1 to 10. The held member is held.

  Thus, the caulking holding structure in which the held member is held by the caulking holding method according to any one of claims 1 to 10 includes the held member and the cylindrical workpiece that holds the held member as described above. Thus, the difference in the amount of elastic deformation in the clamping force direction is enlarged, and the residual axial force at the work base can be increased. Thus, the caulking holding structure of the present invention can improve the clamping force for holding the held member.

  In addition, since the caulking process and the applied pressure process for increasing the amount of plastic deformation are made independent, the formation of the caulking part and the improvement of the residual axial force are not mutually restricted, with a high degree of freedom. The caulking holding structure is formed in a desired state. Therefore, a caulking holding structure having high durability and sufficient residual axial force is realized.

  The caulking machine according to claim 12 is for holding the member to be held along the base portion of the cylindrical workpiece by bending the end portion of the cylindrical workpiece to form the caulking portion, and by the clamping force of the caulking portion. A caulking roller and a pressure applying roller for applying pressure in the same direction as the clamping force direction to a ring-shaped corner formed on the base of the cylindrical workpiece on the opposite side to the bending direction of the caulking portion And a processing roller rotating shaft that revolves around the axis of a cylindrical workpiece by supporting the caulking roller so as to rotate, and the processing roller rotating shaft is provided separately, and the pressure applying roller A pressure-applying roller rotating shaft that revolves around the axis of a cylindrical workpiece supported so as to rotate is provided.

  By using a caulking machine equipped with such a roller and a roller rotating shaft, the caulking holding method can be executed as described above, and the clamping force for holding the held member in the cylindrical workpiece can be improved. it can.

  Furthermore, the caulking process roller and the pressure applying roller are respectively independent rotating shafts, so that the caulking process by the caulking process roller and the pressure applying process by the pressure applying roller for increasing the amount of plastic deformation are independent. Can be executed. For this reason, it is possible to execute the caulking portion formation and the improvement of the residual axial force in a desired state without being mutually restricted, and it is possible to increase the degree of freedom of caulking holding in the cylindrical workpiece, so that the durability is improved. A high and sufficient residual axial force caulking holding structure can be realized.

  In the caulking machine according to claim 13, in the caulking machine according to claim 12, a pressure for independently adjusting the caulking pressure by the caulking roller and the application pressure by the pressure applying roller, respectively. An adjustment mechanism is provided.

  In addition to the caulking roller and the pressure applying roller being independent rotating shafts, the pressure adjusting mechanism further adjusts the pressure for caulking by the caulking roller and increases the amount of plastic deformation. The application pressure adjustment by the pressure application roller is performed independently. This makes it possible to adjust the formation of the caulking portion and the improvement of the residual axial force to a desired state without being mutually restricted. Thus, by making pressure adjustment independent, the degree of freedom of caulking and holding can be further increased, and a caulking holding structure having high durability and sufficient residual axial force can be easily realized.

  In the caulking machine according to claim 14, in the caulking machine according to claim 13, the caulking roller is revolved around the axis of the cylindrical workpiece to adjust the caulking pressure to form the cylindrical workpiece. The caulking process is performed by bending the end portion of the cylindrical workpiece to the inner peripheral side to form a caulking portion, and the pressure applying roller is revolved around the axis of the cylindrical workpiece to adjust the applying pressure. And the control apparatus which performs simultaneously the pressure provision process which provides the pressure to the said ring-shaped corner | angular part in the same direction as the said clamping force direction is provided.

  Even if the caulking pressure and the applied pressure are simultaneously applied to the cylindrical workpiece by causing such a control device to function, these pressures can be distributed around the axis of the cylindrical workpiece. For this reason, even if the caulking process step and the pressure applying step are simultaneously performed, the caulking portion can be formed with high accuracy on the cylindrical workpiece, and sufficient residual axial force is uniformly generated around the axis of the cylindrical workpiece. Can do.

  In the caulking machine according to claim 15, in the caulking machine according to claim 14, the control device performs the caulking process prior to a period of simultaneously executing the caulking process and the pressure applying process. It is characterized by executing control to start the process.

  As described above, when both the caulking process and the pressure applying process are executed, the end of the cylindrical workpiece is not moved to the outer peripheral side by the caulking process roller by starting the caulking process first. Can be fixed. And after this, in the pressure application step, the application pressure is applied to the ring-shaped corners protruding to the outer peripheral side, so that the position of the end portion of the cylindrical workpiece can be made difficult to shift during the pressure application step. .

  As a result, even if the caulking step and the pressure applying step are finally performed at the same time, the caulking portion can be formed on the cylindrical workpiece with high accuracy, and a sufficient residual axial force can be evenly distributed around the axis of the cylindrical workpiece. Can be generated.

  In the caulking machine according to claim 16, in the caulking machine according to claim 13, the caulking roller is revolved around the axis of the cylindrical workpiece to adjust the caulking pressure to form the cylindrical workpiece. The caulking process is performed by bending the end portion of the cylindrical workpiece to the inner peripheral side to form a caulking portion, and the pressure applying roller is revolved around the axis of the cylindrical workpiece to adjust the applying pressure. And the control apparatus which performs the pressure provision process which provides the pressure to the said ring-shaped corner | angular part in the same direction as the said clamping force direction in a different period is provided.

  By functioning such a control device, the pressure load on the cylindrical workpiece can be dispersed in time even if the caulking pressure and the applied pressure are executed in different periods. This also enables the caulking portion to be formed on the cylindrical workpiece with high accuracy, and a sufficient residual axial force can be uniformly generated around the axis of the cylindrical workpiece.

  In the caulking machine according to claim 17, in the caulking machine according to any one of claims 12 to 16, the held member is a bearing, and the cylindrical workpiece is rotatable by the bearing. It is the housing which accommodates the rotation member arrange | positioned inside, or a bearing holder arrange | positioned in this housing.

  Thus, the present invention can be applied to a caulking machine for holding a bearing in the housing or the bearing holder, and the difference in the amount of elastic deformation in the axial direction between the bearing and the housing or the bearing holder is increased more than usual. it can. For this reason, the residual axial force in the housing or the bearing holder is increased as compared with the caulking process with a normal caulking machine, and the clamping force for holding the bearing can be improved.

  Moreover, in the caulking machine according to the present invention, it is possible to adjust the formation of the caulking portion in the housing or the bearing holder and the improvement of the residual axial force to a desired state without mutual restriction. Since the degree of freedom can be increased, a caulking holding structure with high durability and sufficient residual axial force can be realized.

  In this way, it is possible to realize a caulking holding structure with high durability and sufficient clamping force with sufficient residual axial force, without preparing a mechanism for mounting the bearing in the housing or bearing holder with bolts or the like. Therefore, the entire housing or bearing holder can be reduced in size.

  In the caulking machine according to claim 18, in the caulking machine according to claim 17, the bearing and the housing or the bearing holder are a bearing and a housing or a bearing holder in a rotation-linear motion conversion actuator, The rotation-linear motion conversion actuator has a rotating member disposed in the housing or the bearing holder attached to the device to be driven so as to be rotatable via the bearing, and the rotation of the rotating member causes the axial direction of the cylindrical workpiece to move. An output shaft that moves to the drive object is arranged in a state of protruding outward from the housing, and a driving force is transmitted from the output shaft to the device to be driven.

  The caulking machine of the present invention can be applied to the manufacture of such a rotation-linear motion conversion actuator. By caulking with this caulking machine, a large residual axial force can be set in the housing or bearing holder, and a sufficient bearing holding structure with high durability can be realized by caulking. For this reason, the rotation-linear motion conversion actuator can be reduced in size, and further, the entire drive target device can be reduced in size.

  In the caulking machine according to claim 19, in the caulking machine according to claim 18, the rotating member is a nut of a planetary differential screw type rotation-linear motion conversion mechanism, and the output shaft is a sun shaft. Since a planetary shaft is disposed between the nut and the sun shaft, rotation-linear motion conversion is performed by a meshing mechanism between the sun shaft, the planetary shaft, and the nut formed in the nut. It is characterized by that.

  The rotation-linear motion conversion actuator may be configured as such a planetary differential screw type rotation-linear motion conversion mechanism, and even if such a rotation-linear motion conversion actuator is used, the same actions and effects as in claim 18 are achieved. Produce.

The caulking machine according to claim 20 is the caulking machine according to claim 18 or 19, wherein the drive target device is an internal combustion engine.
An internal combustion engine that employs a bearing holding structure that is caulked using the caulking machine can be downsized as a whole.

[Embodiment 1]
The longitudinal cross-sectional view shown in FIG. 1 represents the structure of the rotation-linear motion conversion actuator (henceforth an "actuator") 2 to which the invention mentioned above was applied. The actuator 2 is attached to the outer surface of a cylinder head or a cam carrier using an internal combustion engine as a device to be driven. In particular, the actuator 2 drives a control shaft provided in the variable valve mechanism in the axial direction in order to drive the variable valve mechanism on the cylinder head. Here, the actuator 2 is attached to the outer peripheral surface 4a of the cam carrier 4 as shown by a one-dot chain line.

  In the housing 6 of the actuator 2, a bearing holder 8 is bolted to the front side (F side in the drawing), and a stator 10 is bolted to the rear side (B side in the drawing). The rear end side of the housing 6 is closed by the control panel 12.

  A bearing 14 is attached to the rear end side inside the bearing holder 8. The bearing holder 8 rotatably supports a nut 16 a constituting the outer periphery of the planetary differential screw type rotation-linear motion conversion mechanism 16 via the bearing 14.

  The planetary differential screw type rotation-linear motion conversion mechanism 16 is disposed in the inner space of the housing 6 over the entire length in the axial direction. As shown in the partially broken perspective view of FIG. 2, the planetary differential screw type rotation-linear motion converting mechanism 16 includes a nut 16a as a rotating member, an output shaft 16b as a sun shaft, and between the nut 16a and the output shaft 16b. Is provided with a planetary shaft 16c. The nut 16a and the planetary shaft 16c are engaged with each other by a gear and a screw. Similarly, the planetary shaft 16c and the output shaft 16b are also engaged by a gear and a screw.

  A rotor 18 is attached to the rear end of the nut 16a by press-fitting as shown in FIG. 1, and the rotor 18 is rotationally driven through the stator 10 by the drive signal from the control panel 12, thereby the nut. 16a rotates around the axis. The rotation of the nut 16a causes the planetary shaft 16c to revolve around the output shaft 16b while rotating. The output shaft 16b, which is spline-fitted with the tip of the bearing holder 8 and prevented from rotating around the axis by the differential action of screws generated by the rotation and revolution of the planetary shaft 16c, is axially (arrowed) F direction) occurs. In conjunction with the axial movement of the output shaft 16b, the control shaft of the variable valve mechanism that exists in the space in the cam carrier 4 moves in the axial direction, and this movement causes the maximum valve of the intake valve in each cylinder of the internal combustion engine. The lift amount is continuously adjusted.

  A bearing 14 (corresponding to a member to be held) that supports the entire planetary differential screw type rotation-linear motion conversion mechanism 16 has an outer race 14a that has a contact surface 8a installed inside the bearing holder 8 by a step, It is clamped in the axial direction by the caulking portion 8b at the rear end. As a result, the entire planetary differential screw type rotation / linear motion conversion mechanism 16 is held at the reference position in the housing 6 via the bearing holder 8.

  Here, the caulking process for forming the caulking portion 8b will be described. The assembled state immediately before caulking is shown in the sectional view of FIG. Before caulking, the rear end (upper side in FIG. 3) of the bearing holder 8 (corresponding to a cylindrical workpiece) is an unprocessed portion 8x that rises in a cylindrical shape. Accordingly, the rear side is open, and the planetary differential screw type rotation-linear motion conversion mechanism 16 is inserted into the bearing holder 8 from the rear side. The planetary differential screw type rotation-linear motion conversion mechanism 16 is in a state in which the bearing 14 is fitted to the outer periphery of the nut 16a and fixed by the snap ring 20 prior to insertion. In addition, the seal ring 22 is also inserted in advance from the rear side and disposed at a predetermined position. The seal ring 22 may be disposed at the same time when the planetary differential screw type rotation-linear motion conversion mechanism 16 is inserted by being fitted to the planetary differential screw type rotation-linear motion conversion mechanism 16 in advance.

  In the caulking process, the configuration shown in FIG. 3 is arranged in the caulking machine 23 as shown in the block diagram of FIG. As a result, as shown in FIGS. 5 to 7, the two caulking rollers 24 and the two pressure applying rollers 26 provided in the caulking machine 23 are arranged around the axis Ax with respect to the bearing holder 8. FIG. 5 is a plan view showing an arrangement state, FIG. 6 is an illustration of arrangement from the front side, and FIG. 7 is an illustration of arrangement from the right side.

  As shown in the figure, the two caulking rollers 24 are arranged so as to face each other around the axis Ax of the bearing holder 8 at a phase interval of 180 °, and the rotation shaft Bx common to the two caulking rollers 24 is a bearing. The holder 8 is in a state orthogonal to the axis Ax.

  The two pressure applying rollers 26 are also arranged so as to face each other around the axis Ax of the bearing holder 8 with a phase interval of 180 °, and the rotation axis Cx common to the two pressure applying rollers 26 is the axis Ax of the bearing holder 8. It is in a state orthogonal to. The positional relationship between the two caulking rollers 24 and the two pressure applying rollers 26 is arranged around the axis Ax of the bearing holder 8 with a phase difference of 90 °. Thus, the four rollers 24 and 26 are arranged around the axis Ax of the bearing holder 8 at a phase interval of 90 °.

  In this arrangement, as shown in FIG. 8, the caulking surface 28 formed on the outer periphery of the tip end portion of the caulking roller 24 is lowered along the axis Ax direction of the bearing holder 8 to the unprocessed portion 8 x of the bearing holder 8. Let them touch. Further, as shown in FIG. 9, the pressure applying surface 30 formed on the outer periphery of the tip of the pressure applying roller 26 is brought into contact with the ring-shaped corner portion 8 y of the bearing holder 8 along the axis Ax direction of the bearing holder 8. .

  8 and 9, the caulking roller 24 and the pressure applying roller 26 are revolved around the axis Ax of the bearing holder 8 by the rotating mechanism 23 a provided in the caulking machine 23. Then, the processing roller rotating shaft 24a and the pressure applying roller rotating shaft 26a are provided in the caulking machine 23 in a direction orthogonal to the axes Bx and Cx, that is, downward along the axis Ax direction of the bearing holder 8. The pressure from the pressurizing mechanisms 23b and 23c is applied. The pressurizing mechanisms 23b and 23c are provided with a pressure generating device such as a hydraulic pressure, and are provided with a pressure adjusting mechanism, and the pressure required for the rollers 24 and 26 by the pressure adjusting mechanism. Are added independently. These series of steps are executed manually or automatically by the operator via the caulking machine control device 23d.

Since these rollers 24 and 26 are supported so as to be capable of rotating about the axes Bx and Cx via the rotating shafts 24a and 26a, the rollers 24 and 26 are rotated at the same time as the revolution caused by the pressurization.
The caulking roller 24 caulks the unprocessed portion 8x of the bearing holder 8 by the revolution and rotation caused by the pressurization. By this caulking, as shown in FIG. 10, the unmachined portion 8x at the end of the bearing holder 8 is bent in the direction perpendicular to the axis Ax of the bearing holder 8 on the inner peripheral side of the bearing holder 8, and the caulked portion 8b. Form. Thus, the outer race 14a can be clamped between the caulking portion 8b and the contact surface 8a, and the bearing 14 can be held inside the bearing holder 8.

  With respect to the pressure applying roller 26, as shown in FIG. 11, in the bearing holder 8, the ring-shaped corner portion 8y at the tip position of the peripheral wall portion 8c (corresponding to the workpiece base) that is not bent by the caulking roller 24. It abuts on the tip. As a result, pressure is applied to the peripheral wall portion 8c in the direction of the axis Ax of the bearing holder 8, here, the same direction as the clamping force direction by the caulking portion 8b (downward in the drawing).

  As shown in enlarged view in FIG. 12 (a), the peripheral wall portion 8c not to be bent is caulked by the processing roller 24 from the unprocessed portion 8x (corresponding to the caulking portion 8b after caulking) side during caulking. The pressure by the surface 28 is applied in the direction along the axis Ax of the bearing holder 8 (the clamping force direction) as indicated by the solid arrow. On the other hand, as shown in FIG. 12B, the pressure applying surface 30 of the pressure applying roller 26 presses the ring-shaped corner 8y, so that the ring-shaped corner 8y also applies pressure to the peripheral wall 8c. Will be added in the same direction.

  When caulking is performed on the unmachined portion 8x by the caulking roller 24, elastic deformation and plastic deformation occur. This plastic deformation causes a plastic flow toward the tip side at the caulking portion 8b as shown by a broken arrow in FIG. The caulking process causes plastic flow to the peripheral wall portion 8c side as indicated by the solid arrow, but the pressure applying roller 26 presses the ring-shaped corner portion 8y existing in the vicinity of the unprocessed portion 8x. Plastic flow toward the peripheral wall 8c side is promoted, and the amount of plastic deformation associated therewith increases.

  When this increase in the amount of plastic deformation occurs in the peripheral wall 8c, the amount of elastic deformation in the peripheral wall 8c decreases accordingly. Note that the outer race 14a of the bearing 14 that receives pressure from the end face 14b via the unmachined portion 8x (caulking portion 8b) during caulking is a hard material and is only elastically deformed. For example, the bearing holder 8 and the outer race 14 a are both made of steel, but the outer race 14 a is made of steel that is harder than the bearing holder 8. For example, the bearing holder 8 is made of general stainless steel or the like, and the outer race 14a is made of high hardness steel such as high carbon chrome steel.

  Due to the difference between the amount of elastic deformation at the outer race 14a of the bearing 14 and the amount of elastic deformation at the peripheral wall portion 8c of the bearing holder 8, a residual axial force is generated in the bearing holder 8 after caulking. With this residual axial force, the outer race 14a is in contact with the contact surface 8a, so that the entire bearing 14 is held in the bearing holder 8 by receiving the clamping pressure from the caulking portion 8b. As a result, the nut 16 a of the planetary differential screw type rotation-linear motion conversion mechanism 16 is rotatably supported in the bearing holder 8.

  As described above, since pressure is applied by the pressure applying roller 26 to the peripheral wall portion 8c of the bearing holder 8, the amount of elastic deformation at the peripheral wall portion 8c of the bearing holder 8 is reduced, and the elastic deformation of the bearing 14 at the outer race 14a is reduced. The difference between the amount and the amount of elastic deformation at the peripheral wall portion 8c of the bearing holder 8 increases. As a result, the residual axial force of the bearing holder 8 generated after caulking is increased, and the clamping force for clamping the outer race 14a of the bearing 14 is also increased.

According to the first embodiment described above, the following effects can be obtained.
(I). In the present embodiment, the end of the bearing holder 8 (unprocessed portion 8x) is not simply bent only by caulking by the caulking roller 24 to form the caulking holding structure. In addition to the caulking process, the pressure applying process is executed by the pressure applying roller 26 at the same time. As a result, in the base portion (circumferential wall portion 8 c) of the bearing holder 8, a member to be held (bearing 14) is formed on the ring-shaped corner portion 8 y formed on the outer peripheral side in the vicinity of the unprocessed portion 8 x (caulking portion 8 b after caulking). ) Is applied in the same direction as the clamping force direction. As a result, as described above, the residual axial force in the bearing holder 8 is increased, and the clamping force for holding the outer race 14a of the bearing 14 can be improved.

  Thus, the caulking process and the pressure applying process are performed simultaneously, but are performed by separate rollers 24 and 26, respectively. For this reason, the caulking process by the caulking process roller 24 and the pressure application by the pressure applying roller 26 for increasing the amount of plastic deformation can be performed independently. Therefore, the formation of the caulking part 8b and the improvement of the residual axial force in the peripheral wall part 8c can be achieved. Are not mutually constrained. Therefore, since the clamping force of the outer race 14a can be set with a high degree of freedom without being greatly affected by the caulking process, the caulking holding structure formed is highly durable and has a sufficient residual axial force caulking holding structure. realizable.

  As a result, a caulking holding structure with high durability and sufficient clamping force can be achieved without preparing a separate mechanism for attaching the bearing 14 to the bearing holder 8 with bolts or the like. The entire bearing holder 8 can be reduced in size, which can contribute to downsizing the entire actuator 2 and the entire internal combustion engine to which the actuator 2 is applied.

  (B). In this embodiment, a plurality of caulking rollers 24 and a plurality of pressure applying rollers 26 are used to simultaneously perform the caulking step and the pressure applying step. Here, in particular, the two caulking rollers 24 are revolved at equal phase intervals (180 ° intervals) around the axis Ax of the bearing holder 8. Further, the two pressure applying rollers 26 are revolved at an equal phase interval (180 ° interval) around the axis Ax of the bearing holder 8 with a 90 ° phase difference from the caulking roller 24.

  By arranging the rollers 24 and 26 in this way and simultaneously performing the caulking process step and the pressure applying step, the caulking portion 8b can be formed with high accuracy with respect to the bearing holder 8 even with a small number of rollers. It is possible to uniformly generate a residual axial force around the axis Ax of the bearing holder 8.

As a result, the planetary differential screw type rotation-linear motion conversion mechanism 16 can be formed with high accuracy, and the operation thereof can be performed with high accuracy, and the durability is also improved.
(C). In the caulking machine 23, the caulking pressure of the caulking roller 24 and the application pressure of the pressure applying roller 26 are adjusted independently of each other. Therefore, the formation of the caulking portion 8b and the improvement of the residual axial force at the peripheral wall portion 8c can be realized by adjusting to a desired state without being mutually restricted. By making the pressure adjustment independent as described above, it is possible to further increase the degree of freedom of caulking and holding the outer race 14a, and it is possible to easily realize a caulking holding structure having high durability and sufficient residual axial force.

[Embodiment 2]
In the present embodiment, the caulking processing control device 23d performs caulking processing control shown in the flowchart of FIG. 13, unlike the first embodiment, and other configurations are the same as those in the first embodiment. is there.

  Here, the caulking machine control device 23d is a control device in which an electronic control circuit using a microcomputer is incorporated, and the caulking processing control shown in FIG. 13 is executed by a program.

  The caulking process control (FIG. 13) will be described. This process is a process that is repeatedly executed at regular time intervals by an interrupt process. The steps in the flowchart corresponding to the individual processing contents are represented by “S˜”.

  When this process is started, first, a caulking process state is determined (S102). Immediately after the start of the caulking machine control device 23d, the caulking process is completed by the initial setting (determined to be completed in S102), so that all the rollers 24, 26 are applied to all the pressurizing mechanisms 23b, 23c. A pressurization stop process (S104) is performed so as not to pressurize.

  Thereafter, a caulking processing instruction from another computer that manages the manufacturing process is given to the caulking machine control device 23d, and an caulking processing instruction by an operator is given from an instruction panel provided in the caulking machine control device 23d. Unless otherwise specified, it is determined that the process is completed in step S102, and the caulking process is not executed.

  When the caulking processing instruction is received by the caulking machine control device 23d after the components shown in FIG. 3 are installed in the caulking machine 23 and ready for caulking, as shown in FIG. Since the caulking process is not completed in response to the caulking process instruction (determined as incomplete in S102), the preliminary caulking process state is then determined (S106). Here, since it is incomplete (determined as incomplete in S106), preliminary caulking by only the caulking roller 24 is executed (S108).

  In this preliminary caulking, a pressure for starting bending is applied from the caulking surface 28 of the caulking roller 24 to the unmachined portion 8x of the bearing holder 8 shown in FIG. By doing so, the unprocessed portion 8x of the bearing holder 8 is sufficiently adhered to the outer race 14a side so that the unprocessed portion 8x and the ring-shaped corner portion 8y in the vicinity thereof are not separated from the outer race 14a to the outer peripheral side. To.

  In the subsequent control cycle, if the caulking is not yet completed (determined as incomplete in S102) and the preliminary caulking is incomplete (not completed in S106), the preliminary caulking (S108) continues. Will do.

  This preliminary caulking process completion determination is, for example, the time of preliminary caulking, or the deformation amount of the unmachined portion 8x (measured by a measuring machine or the like provided in the caulking machine 23 as the displacement of the caulking machine roller 24). Judgment by

  When the preliminary caulking process is completed (determined to be completed in S106), the caulking part 8b is completely formed with respect to the unprocessed part 8x by the caulking process roller 24 by the control of the pressurizing mechanisms 23b and 23c. An additional step of caulking and a pressure applying step of applying and pressurizing the ring-shaped corner 8y by the pressure applying roller 26 are executed (S110). That is, processing as shown in the first embodiment is performed.

  Until the caulking process accompanied by the pressure applying process is determined to be completed by measuring time or the amount of deformation, or both the time and the amount of deformation (determined as incomplete in S102, determined as completed in S106) The process of S110 continues.

  When the caulking process accompanied by the pressure applying process is completed (determined to be completed in S102), the pressurization is stopped (S104), whereby the pressurizing mechanisms 24b and 23c are applied to the caulking process roller 24 and the pressure applying roller 26. The pressure is stopped.

Thereafter, until a caulking process instruction is received again, it is determined to be completed in step S102, and the pressurization stop (S104) continues.
According to the second embodiment described above, the following effects can be obtained.

  (I). In addition to the effects of the first embodiment, the preliminary caulking process, that is, the preliminary caulking process process is started first before the caulking process and the pressure applying process are performed together. As a result, the unprocessed portion 8x which is the end portion of the bearing holder 8 is fixed by the caulking roller 24, and the unprocessed portion 8x and the ring-shaped corner portion 8y in the vicinity thereof can be prevented from moving to the outer peripheral side. Thereafter, in the pressure application step, pressure is applied to the ring-shaped corner portion 8y that protrudes from the pressure application roller 26 toward the outer peripheral side. Therefore, the position of the end portion of the bearing holder 8 is not easily displaced during the pressure application step. Become.

  As a result, the caulking portion 8b can be formed in the bearing holder 8 with high accuracy even when the caulking process and the pressure applying step are finally performed at the same time, and a sufficient residual axial force can be generated around the axis Ax of the bearing holder 8. It can be generated uniformly.

[Other embodiments]
(A). In each of the above embodiments, the caulking process and the pressure applying process are performed simultaneously, or the preliminary caulking process is performed before the simultaneous execution, but in addition to this, the caulking process and the pressure applying process are performed. May be executed in different periods. For example, after the caulking process is completed by the caulking process roller 24, the pressure applying process to the ring-shaped corner 8y by the pressure applying roller 26 may be performed.

  Furthermore, you may perform so that a part of period of a caulking process process and a pressure provision process may overlap. For example, the caulking process is started first, then the pressure applying process is started during the caulking process, and the pressure applying process is continued for a while after the caulking process is completed, and then the pressure applying process is completed. good. Moreover, you may perform in the reverse order.

  (B). In each of the embodiments described above, the caulking roller 24 and the pressure applying roller 26 are rotated by friction with the cylindrical workpiece (here, the bearing holder 8) along with the revolution by the rotating mechanism 23a. The mechanism 23a and other rotating mechanisms may be used to positively rotate with a rotational driving force.

  (C). In each of the embodiments described above, the caulking machine 23 has the two caulking rollers 24 and the two pressure applying rollers 26 facing each other at a phase interval of 180 °, so that the caulking rollers 24 and the pressure applying rollers 26 are in contact with each other. Are arranged at a phase interval of 90 °. In addition, one caulking process roller 24 and one pressure applying roller 26 may be arranged to face each other at a phase interval of 180 °, and the caulking process and the pressure applying process may be executed simultaneously. Also in this case, the pressure is applied to the bearing holder 8 symmetrically across the axis Ax of the bearing holder 8, so that the pressure balance is better than that of one roller, the caulking portion 8b can be formed with high accuracy, and the residual axial force is also increased. Can be made uniform around the axis Ax.

  Three or more caulking rollers 24 and pressure applying rollers 26 may be provided. By arranging them at equal phase intervals, the pressure balance can be maintained well, the caulking portion 8b can be formed with high accuracy, and the residual axial force can be made uniform around the axis Ax of the bearing holder 8.

  (D). In each of the above-described embodiments, the caulking roller 24 and the pressure applying roller 26 are supported by one roller 24, 26 so as to be cantilevered by a single rotary shaft 24a, 26a. When the planetary differential screw type rotation-linear motion converting mechanism 16 disposed in the bearing holder 8 has a short length in the axis Ax direction, the rollers 24 and 26 facing each other at 180 ° are connected to each other. You may make it support with a rotating shaft so that rotation is possible.

  As a result, more stable shaft support and stable pressurization are possible, the caulking portion 8b can be formed with higher accuracy, and the residual axial force can be made more uniform around the axis Ax of the bearing holder 8.

  Further, if the difference in diameter between the caulking roller 24 and the pressure applying roller 26 is increased, the processing roller 24 and the pressure applying roller 26 are arranged at the same phase position around the axis Ax of the bearing holder 8. You can also. As a result, in the unprocessed portion 8x and the ring-shaped corner portion 8y, caulking and pressure application are performed at the same timing with respect to the same phase position. From this, the difference in the amount of elastic deformation can be made larger, and the formation of the caulking portion 8b that can be held with a large clamping force can be made effective.

  (E). In each of the embodiments described above, the outer race 14a of the bearing 14 is clamped by the bearing holder 8, but may be directly clamped by the housing without using the bearing holder 8. That is, it is good also as a structure which forms a crimp part in a housing by adding a crimping process to a housing, and hold | maintains the outer race of a bearing directly in a housing. Also in this case, by forming the ring-shaped corner portion in the housing and executing the pressure applying step, the same effect as that in the case where it is held by the bearing holder 8 as described above is produced.

  (F). In each of the above-described embodiments, an example in which the ring-shaped corner portion is formed in the bearing holder or the housing specially for executing the pressure applying process has been described. However, pressure is applied to the bearing holder or the housing in the direction of the clamping force of the outer race. If there is a part that can be used, the part may be used as a ring-shaped corner.

  (G). In each of the embodiments described above, the mechanism driven by the actuator 2 is a variable valve mechanism that can continuously adjust the maximum valve lift amount of the intake valve provided in the internal combustion engine. A variable valve mechanism that can continuously adjust the maximum valve lift amount of the exhaust valve is also possible. Furthermore, the mechanism driven by the actuator is not limited to the variable valve mechanism, and may be another mechanism. Moreover, it is not restricted to the use in an internal combustion engine.

  (H). In each of the above embodiments, the planetary differential screw type rotation-linear motion conversion mechanism is employed as the rotation-linear motion conversion mechanism, but a feed screw mechanism may be used.

FIG. 3 is a longitudinal sectional view of the rotation-linear motion conversion actuator in the first embodiment. The partial fracture perspective view of the planetary differential screw type rotation-linear motion conversion mechanism used for the rotation-linear motion conversion actuator. In Embodiment 1, it is a longitudinal cross-sectional view which shows the assembly state just before caulking. 1 is a block diagram of a caulking machine according to Embodiment 1. FIG. The top view which shows the arrangement | positioning state of a roller and a bearing holder in the said crimping machine. The arrangement explanatory view from the front side similarly. The arrangement explanatory drawing from the right side side similarly. The arrangement explanatory view from the front side at the same time when caulking is started. The arrangement explanatory view from the right side at the time of starting caulking similarly. The arrangement explanatory view from the front side at the time of caulking similarly. The arrangement explanatory view from the right side at the time of caulking processing similarly. In Embodiment 1, it is explanatory drawing regarding the effect | action and effect of a caulking process process and a pressure provision process. In Embodiment 2, the flowchart of the crimping process which a crimping machine control apparatus performs.

Explanation of symbols

  2 ... Actuator, 4 ... Cam carrier, 4a ... Outer peripheral surface, 6 ... Housing, 8 ... Bearing holder, 8a ... Contact surface, 8b ... Caulking part, 8c ... Peripheral wall part, 8x ... Unprocessed part, 8y ... Ring-shaped corner , 10 ... stator, 12 ... control panel, 14 ... bearing, 14a ... outer race, 14b ... end face, 16 ... planetary differential screw type rotation-linear motion conversion mechanism, 16a ... nut, 16b ... output shaft, 16c ... planetar Re-shaft, 18 ... rotor, 20 ... snap ring, 22 ... seal ring, 23 ... processing machine, 23a ... rotating mechanism, 23b, 23c ... pressurizing mechanism, 23d ... processing machine control device, 24 ... caulking roller, 24a ... Caulking roller rotating shaft, 26 ... Pressure applying roller, 26a ... Pressure applying roller rotating shaft, 28 ... Caulking surface, 30 ... Pressure applying surface, Ax ... Shaft, Bx, x ... axis of rotation.

Claims (20)

A caulking roller supported to be able to rotate is revolved around the axis of the cylindrical workpiece and caulked to the cylindrical workpiece to bend the end of the cylindrical workpiece to the inner peripheral side to form a caulking portion. A caulking holding method for holding a member to be held along the work base inside the work by the clamping force of the caulking part,
As the cylindrical workpiece, a ring-shaped corner portion protruding on the outer peripheral side in the vicinity of the caulking portion is formed on the workpiece base,
A caulking process by the caulking roller;
A pressure applying roller supported so as to be capable of rotating independently of the caulking roller is revolved around the axis of the cylindrical workpiece, and this pressure applying roller causes the ring-shaped corner to be in the same direction as the clamping force direction. Applying a pressure to the pressure application step;
A caulking holding method characterized by performing the following. 2. The caulking process according to claim 1, wherein the caulking process step and the pressure are performed by revolving the caulking process roller and the pressure applying roller at different phase positions around an axis of the cylindrical workpiece. A caulking holding method characterized in that the applying step is performed simultaneously. 3. The caulking and holding method according to claim 2, wherein a plurality of the caulking rollers are revolved at equal phase intervals around the axis of the cylindrical workpiece, and the plurality of pressure applying rollers are arranged around the axis of the cylindrical workpiece. A caulking holding method characterized in that the caulking process step and the pressure applying step are performed simultaneously by revolving at equal phase intervals. 4. The caulking holding method according to claim 3, wherein the two caulking rollers revolve around the axis of the cylindrical workpiece at equal phase intervals, and the two pressure applying rollers are set around the axis of the cylindrical workpiece. A caulking and holding method characterized in that the caulking process and the pressure applying process are performed simultaneously by revolving with a phase difference of 90 ° from the caulking roller at equal phase intervals. The caulking and holding method according to any one of claims 1 to 4, wherein the caulking step and the pressure applying step each independently adjust a pressure on the cylindrical workpiece. Method. In the caulking holding method according to any one of claims 1 to 5, after starting the caulking process first, the caulking process is started by starting the pressure applying process during the caulking process. A caulking and holding method, wherein the pressure applying step is performed simultaneously. The caulking and holding method according to any one of claims 1 to 6, wherein the held member is a bearing, and the cylindrical work houses therein a rotating member that is rotatably arranged by the bearing. A caulking holding method comprising a housing or a bearing holder disposed in the housing. 8. The caulking holding method according to claim 7, wherein the bearing and the housing or the bearing holder are a bearing and a housing or a bearing holder in a rotation-linear motion conversion actuator, and the rotation-linear motion conversion actuator is a device to be driven. A rotating member is disposed in the housing or the bearing holder attached to the rotating shaft so as to be rotatable via the bearing, and an output shaft that moves in the axial direction of the cylindrical workpiece is rotated from the housing to the outside by the rotation of the rotating member. A caulking holding method characterized in that the driving force is transmitted from the output shaft to the device to be driven by being arranged in a protruding state. 9. The caulking and holding method according to claim 8, wherein the rotating member is a nut of a planetary differential screw type rotation-linear motion converting mechanism, the output shaft is a sun shaft, and a planetar is provided between the nut and the sun shaft. The caulking and holding method is characterized in that rotation-linear motion conversion is performed by a meshing mechanism between the sun shaft, the planetary shaft, and the nut formed in the nut by arranging a reshaft. The caulking and holding method according to claim 8 or 9, wherein the drive target device is an internal combustion engine. The caulking processing step and the pressure applying step are performed by the caulking holding method according to any one of claims 1 to 10, and the held member is held in the cylindrical workpiece. Caulking retention structure. A caulking roller for holding the member to be held along the base of the cylindrical workpiece by the clamping force of the caulking portion by bending the end of the cylindrical workpiece to form a caulking portion;
A pressure applying roller for applying pressure in the same direction as the clamping force direction to a ring-shaped corner formed on the base of the cylindrical workpiece on the side opposite to the bending direction of the caulking portion;
A processing roller rotating shaft that revolves around the axis of a cylindrical workpiece by supporting the caulking roller so as to be capable of rotating;
A pressure applying roller rotating shaft that is provided separately from the processing roller rotating shaft and that revolves around the axis of a cylindrical workpiece by supporting the pressure applying roller in a rotatable manner;
A caulking machine characterized by comprising: 13. The caulking machine according to claim 12, further comprising a pressure adjusting mechanism that independently adjusts the caulking pressure by the caulking roller and the application pressure by the pressure applying roller. Processing machine. The caulking machine according to claim 13, wherein the caulking roller is revolved around an axis of the cylindrical workpiece and the caulking pressure is adjusted to caulk the cylindrical workpiece to end the cylindrical workpiece. A caulking process step in which a caulking part is formed by bending the part to the inner peripheral side, and the clamping force is applied to the ring-shaped corner by revolving the pressure applying roller around the axis of the cylindrical workpiece to adjust the applying pressure A crimping machine comprising a control device that simultaneously performs a pressure applying step for applying pressure in the same direction as the direction. 15. The caulking machine according to claim 14, wherein the control device executes control for starting the caulking process prior to a period in which the caulking process and the pressure applying process are simultaneously performed. Squashing machine. The caulking machine according to claim 13, wherein the caulking roller is revolved around an axis of the cylindrical workpiece and the caulking pressure is adjusted to caulk the cylindrical workpiece to end the cylindrical workpiece. A caulking process step in which a caulking part is formed by bending the part to the inner peripheral side, and the clamping force is applied to the ring-shaped corner by revolving the pressure applying roller around the axis of the cylindrical workpiece to adjust the applying pressure A caulking machine comprising: a control device that performs a pressure applying step for applying a pressure in the same direction as the direction in different periods. The caulking machine according to any one of claims 12 to 16, wherein the held member is a bearing, and the cylindrical workpiece houses therein a rotating member that is rotatably arranged by the bearing. A caulking machine characterized by being a housing or a bearing holder disposed in the housing. The caulking machine according to claim 17, wherein the bearing and the housing or the bearing holder are a bearing and a housing or a bearing holder in a rotation-linear motion conversion actuator, and the rotation-linear motion conversion actuator is a device to be driven. A rotating member is disposed in the housing or the bearing holder attached to the rotating shaft so as to be rotatable via the bearing, and an output shaft that moves in the axial direction of the cylindrical workpiece is rotated from the housing to the outside by the rotation of the rotating member. A caulking machine characterized by being arranged in a protruding state and transmitting a driving force from the output shaft to the device to be driven. 19. The crimping machine according to claim 18, wherein the rotating member is a nut of a planetary differential screw type rotation-linear motion converting mechanism, the output shaft is a sun shaft, and a planetar is provided between the nut and the sun shaft. A caulking machine characterized in that rotation-linear motion conversion is performed by a meshing mechanism between the sun shaft, the planetary shaft, and the nut formed in the nut by arranging a reshaft. The caulking machine according to claim 18 or 19, wherein the drive target device is an internal combustion engine.

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