Piercing ejector rod device

• Main Authors: WANG CHENSHENG, ZHAO MIAOQING, SUN GUOJUN, ZHANG WEI
• Format: Patent
• Language: English
• Published: 18.02.2015
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The utility model relates to a piercing ejector rod device which comprises a frame body and an ejector rod. The ejector rod is arranged on the frame body and comprises an ejector rod body and a piercing plug, a cylinder and a conveying head device are arranged on the frame body, a push rod is connected to the cylinder, a first through hole is formed in the ejector rod body, the push rod is arranged in the first through hole, a protruding block is arranged on the end portion, connected with the piercing plug, of the ejector rod body, and a groove matched with the protruding block is formed in the piercing plug. The conveying head device comprises a supporting piece and a rotating piece, multiple second through holes are formed in the rotating piece, multiple supporting rods are arranged on the inner walls of the second through holes, and arc fixing pieces used for supporting the piercing plug are arranged on the end portions of the supporting rods. After the piercing ejector rod device pierces a steel pipe blank to form a hole, the ejector head and the ejector rod body can be directly separated, the diameter of the ejector rod body is smaller than the diameter of the hole so that the diameter of the hole can not be affected by shaking of the ejector rod when the ejector rod resets, normal operation of subsequent procedures is guaranteed, product quality is guaranteed, and unqualified products are reduced.