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[CN 201820440962.2] Hydraulic press die punching bar
[CN 201820440962.2] Title of a hydraulic press die punch: Application number of a hydraulic press die punch: CN 201820440962.2 Applicant: Nanjing Dianjin Welding Co., Ltd. Application Date: 2018-3-28 Patent Type: Utility Model The utility model discloses a hydraulic press die punch, including an upper die seat, an upper pad, an upper splint, a punch, a lower template, a lower die pad and a lower die base. The punch is a rotating body and is divided into two sections along its length, it includes a cylindrical section and a circular table section, the two sections are integrally formed with a smooth transition at the joint, and the end of the circular table section away from the cylindrical section has a smaller diameter; the installation cavity of the clamping punch in the upper clamping plate includes an upper clamping cavity and a lower clamping cavity from top to bottom along the axis direction. The connection between the cylindrical section and the round table section of the punching rod makes a smooth transition. In the punching process, the upper part of the round table section is completely attached to the inner wall of the lower clamping cavity, and the outer surface of the upper part of the round table section is the stress surface. The stress area is large, the pressure is small, the stress is uniform and balanced, the punching rod is not easy to break, the service life is improved, and the processing cost is reduced.
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