Method for retaining member by caulking

a technology of retaining member and caulking, which is applied in the direction of bearing unit rigid support, forging press, etc., to achieve the effect of reducing the pressure of the caulking process and preventing the amount of plastic deformation

Inactive Publication Date: 2014-07-10
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively increases the residual axial force for better clamping, reduces radial strain, and conserves energy by preventing radial deformation of the bearing, allowing for a more compact and efficient internal combustion engine design.

Problems solved by technology

Thus, during the caulking process to bend the end, even when the pressure is applied to the pressure receiving shoulder portion simultaneously and causes deformation, especially plastic deformation, the groove absorbs plastic flow.

Method used

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  • Method for retaining member by caulking
  • Method for retaining member by caulking
  • Method for retaining member by caulking

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0066]According to the invention in which a method for retaining a member by caulking and a structure of caulked retaining member are realized with the aid of the caulked retaining member as described above, the following effects are obtained. 1) In subjecting the end 8x of the bearing holder 8 to the caulking process, the pressure is applied to the pressure receiving shoulder portion 8y in the same direction as the direction of the clamping force generated by the caulked portion 8b. Thus, as described above, the residual axial force in the bearing holder 8 is larger after the completion of the described caulking process than in the case of a conventional caulking process. Thus, the clamping force for holding the outer race 14a may be increased.

[0067]In addition, the pressure receiving surface 8d of the pressure receiving shoulder portion 8y is set higher than the end surface 14b of the outer race 14a. Thus, no pressure results from plastic deformation of the caulked portion 8b in t...

third embodiment

[0104]Then, when the caulking stroke Lp reaches the stroke point Ly where the relationship dTp≦Bdtp−dy is satisfied (NO in S208), the caulking stop process is executed (S212). The caulking stop process is the same as that described in step S112 of the invention.

[0105]In the above configuration, steps S204, S206, S208, and S210 of the caulking control process (FIG. 11) are equivalent to the processes executed by the specific change detection unit, and step S212 is equivalent to the process executed by the process changing unit.

[0106]As described above, in this embodiment of the invention, the determination of whether to stop the caulking process is based on the caulking torque change amount dTp. The effects described in the third embodiment of the invention are obtained from this as well.

fifth embodiment

[0107]In the invention, the caulking stop process (S112, S212) executed in the caulking control process (FIGS. 9 and 11) differs in that the caulking process continues for a brief period before the caulking stop process is executed as described above.

[0108]That is, as shown in FIG. 12, when the caulking process progresses beyond the stroke point Lx, Ly (the origin in FIG. 12), the strain of the bearing 214 is caused and increased as the caulking stroke Lp increases. If the strain of the bearing 214 is within a permissible range, it is preferable, in view of various errors during the process, to stop the caulking process after the caulking stroke Lp slightly exceeds the stroke point Lx, Ly, so that the bearing 214 is held with a sufficient clamping force.

[0109]For example, if the permissible range of the strain of the bearing 214 is equal to or smaller than 5 μm, it was experimentally determined that the caulking stroke Lp may exceed the stroke point Lx or Ly by 0.2 mm. Accordingly, ...

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Abstract

During a caulking process, a pressure is applied to a pressure receiving shoulder portion in the same direction as a direction of a clamping force generated by a caulking portion. The clamping force for holding an outer race can thereby be increased. Also, a pressure receiving surface of the pressure receiving shoulder portion is set higher than an end face. Thus, no pressure resulting from plastic deformation in a direction perpendicular to the direction of the clamping force of the caulking portion is generated. In addition, a groove is formed between the pressure receiving shoulder portion and an end serving as the caulking portion.

Description

INCORPORATION BY REFERENCE[0001]This is a divisional application of U.S. patent application Ser. No. 12 / 697,489, filed on Feb. 1, 2010, claiming priority based on Japanese Patent Application No. 2009-061488 filed on Mar. 13, 2009, the disclosures of which, including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a caulked retaining member, one end of which is bent through a calking process to form a caulked portion, that holds a member along a base of the caulked retaining member through the clamping force of the caulked portion, a method for retaining a member by caulking, a structure of a caulked retaining member, and a caulking apparatus for a caulking process.[0004]2. Description of the Related Art[0005]There is known a rotation-translation conversion actuator that is mounted in an internal combustion engine or the like to apply a translational d...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B23P15/00B32B1/00
CPCB23P15/003B21D39/04B21K25/00F01L13/0015F01L2820/032F16C35/067F16C19/184F16C2361/61Y10T428/24479Y10T156/1002Y10T29/49647Y10T74/18576Y10T428/13Y10T29/49908Y10T74/18568B21J9/025F16H25/20
InventorISHIDA, TAKESHIFURUKUBO, TARO
OwnerTOYOTA JIDOSHA KK