Vehicle spring production method and vehicle spring
AssigneeNHK Spring Co., Ltd.
InventorJun UMENO
Life of this patent
Estimating the term…
Abstract
A stabilizer includes a stabilizer bar and a rubber bush. The stabilizer bar includes a bar body made of a steel and a coating film covering the bar body. The coating film is formed on the surface of the bar body by using a resin having a water contact angle of more than 65°. By performing surface treatment for reducing the contact angle of the coating film present on an attachment part, the contact angle of the attachment part is changed to 65° or less. A pre-cured liquid adhesive agent is applied to an inner surface (adhesion surface) of the rubber bush. After a region including the attachment part of the stabilizer bar is heated, the rubber bush is overlaid on the attachment part. The adhesive agent is cured in a state where the rubber bush is pressed.
Claims10
A method for manufacturing a vehicle spring provided with a bar member including a bar body formed of a steel material and a coating film covering the bar body, and a rubber member provided on an attachment part of the bar member, the method comprising:
- forming the coating film of resin in which a contact angle with water exceeds 65° on a surface of the bar body;
- changing the contact angle of a bonding surface of the attachment part to 65° or less by surface treatment for making the contact angle of the coating film small;
- applying an uncured liquid adhesive to the rubber member or the attachment part of the bar body;
- and
- making a bonded surface of the rubber member overlap the attachment part of the bar member;
- and
- curing the adhesive in a state where the rubber member is pressed to the attachment part.
A vehicle spring provided with a bar member including a bar body formed of a steel material and a coating film covering the bar body, and a rubber member provided on an attachment part at a part of the bar member in a longitudinal direction,
- the vehicle spring comprising:
- a first portion where a contact angle with water exceeding 65° in a region excluding the attachment part of a surface of the coating film;
- a second portion present on an adhesive surface of the attachment part on a part of the surface of the coating film and including minute uneven portions where a maximum height of a surface roughness curve and a wavelength are small as compared with uneven portions of the first portion;
- and
- an adhesive provided between the adhesive surface and a bonded surface of the rubber member.
Dependencies are inferred from the claim text.