Arm member and method of manufacturing arm member

A method of manufacturing an arm member;

• the arm member comprising:
• a ball joint
• having a ball-side member including a ball part, and a receiving-side member including a swaged part and holding the ball part inside the receiving-side member using deformation of the swaged part, an arm part having an arm part body made of discontinuous fiber-reinforced resin and continuous with the receiving-side member, and a covering part made of continuous fiber-reinforced resin and covering an entire surface of the swaged part,
• wherein the receiving-side member further includes a cylindrical receiving-side member body part and a closing member covering the receiving-side member body part at a first end thereof, the swaged part disposed at the first end
• of the receiving-side member body part and formed to fix the closing member to the receiving-side member body part, and
• the covering part continually covers the entire surface of the swaged part and the closing member;
• the method of manufacturing comprising:
• a swaging step
• of swaging and shaping the swaged part while the ball part is inserted in the receiving-side member to hold the ball part inside the receiving-side member, and a forming step
• of performing hot press forming on the discontinuous fiber-reinforced resin and the continuous fiber-reinforced resin to form the arm part body and the covering part after the swaging step.