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Cylindorical rod and method for manufacturing the same

A manufacturing method and cylinder technology, applied in the field of cylinder shafts, can solve problems such as inability to manufacture axial linearity of the surface

Active Publication Date: 2011-04-13
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, for example, for the purpose of cost reduction, when it is intended to use a cylindrical product instead of a thin-diameter solid metal round bar produced by cutting, it is still impossible to manufacture the roundness of the surface, the straightness of the axial direction, etc. Cylindrical products of satisfactory quality

Method used

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  • Cylindorical rod and method for manufacturing the same
  • Cylindorical rod and method for manufacturing the same
  • Cylindorical rod and method for manufacturing the same

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Embodiment Construction

[0042] Hereinafter, the present invention will be described through the embodiments of the invention. However, the scope of protection claimed by the present invention is not limited to the following embodiments, and all combinations of the features described in the embodiments are not necessarily essential technical features of the present invention.

[0043] FIG. 1 is a diagram showing the shape of a metal plate 10 as a material of a cylindrical shaft 20 according to the present invention. As shown in the figure, the metal plate 10 has a rectangular shape as a whole, but a pair of end portions 12 and 14 which are opposing long sides are joined together by bending to form a cylindrical shaft 20 whose axial direction is the longitudinal direction. . Here, the dimension in the longitudinal direction was 314 mm, and the metal plate 10 whose length from one end 12 to the other end 14 was 10 mm was prepared.

[0044] A plurality of protrusions 16 protruding from the end 12 are fo...

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Abstract

The present invention provides a cylindrical shaft (20) formed of a bent sheet metal (10). The cylindrical shaft (20) comprises projected parts (16) projected from one end part (12) of the pair of joined end parts (12) and (14) of the sheet metal (10) and having portions which increase in width apart from the one end part (12) and recessed parts (18) formed in the other end part (14) of the pair of joined end parts, having such a shape that supplementarily matches that of the projected parts (16), and fitted to the projected parts (16). Thus, the cylindrical shaft (20) high in roundness, lessin both vertical and lateral warpages, and excellent in linearity can be provided.

Description

technical field [0001] The invention relates to cylindrical shafts. In particular, it relates to a cylindrical shaft manufactured by bending a metal plate and a method for manufacturing the same. [0002] For designated countries that recognize the insertion based on document reference, the contents of the specification and drawings described in the following Japanese applications are incorporated by reference into the present application as part of the description of the present application. [0003] Application date of Japanese Patent Application No. 2005-077574: March 17, 2005 [0004] Application date of Special Application No. 2006-043955: February 21, 2006 Background technique [0005] There are many techniques for producing cylindrical products by bending metal plates. Patent Document 1 below discloses a technique for manufacturing a small-diameter tube by bending a relatively thin metal plate. That is, Patent Document 1 discloses a technique in which a core roll ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/06B21D39/03
Inventor 矢野仓至桥诘博野村功雄高岛永光
Owner SEIKO EPSON CORP