Method of assembling a carriage assembly
When crimping suspensions to carriage arms using a metal ball by applying ultrasonic vibration to a crimping tool, the suspensions can be crimped to the carriage arms without causing deformation to the suspensions and the like. A method of assembling a carriage assembly aligns attachment holes provided in front ends of carriage arms and crimping portions provided on suspensions to set the suspensions on the carriage arms and then presses a ball through crimping holes provided in the crimping portions while applying ultrasonic vibration to the crimping tool to crimp the suspensions to the carriage arms. When doing so, a ball, such as a ball whose surface has been subjected to a dimpling process, for which a load that acts on the ball when the ball passes through the crimping holes is low compared to a spherical ball is used to crimp the suspensions to the carriage arms.
1. A method of assembling a carriage assembly, comprising the steps of:
setting a suspension on a carriage arm to align an attachment hole of the carriage arm and a crimping portion of the suspension; and
pressing a ball through a crimping hole provided in the crimping portion so as to crimp the suspension to the carriage arm,
wherein a concave portion or a convex portion is formed in the surface of the ball so as to crimp the suspension to the carriage arm.
2. A method of crimping together a first member and a second member, comprising the steps of:
aligning a crimping portion of the first member, which includes a crimping hole, and a hole of the second member;
positioning a ball, in whose surface a convex portion or a concave portion is formed, on the crimping hole; and
pressing the ball into the crimping hole so as to crimp together the first member and the second member.
3. The method according to claim 2 , wherein ultrasonic vibration is applied to the ball when the ball is pressed into the crimping hole provided in the first member.