| 摘要 |
PURPOSE: A burring apparatus is provided to burr a pipe by pressing or punching instead of heating, thereby ensuring a high burring speed. CONSTITUTION: A burring apparatus comprises an upper die(100) which is arranged under a burring pin that passes through a burring guide hole(110) and supports a pipe when the burring pin punches one side of the pipe and a lower die(200) which is arranged under the upper die and slides in a horizontal direction. First to third trench portions are formed along the length of the upper and lower dies at the left, right, and lower sides of the upper and lower dies in order not to interfere with a burred part formed first at another side of the pipe when the pipe is moved horizontally along the length of the upper and lower dies. First and second grooves(131,133) are formed along the length of the upper die in the front and rear of the burring guide hole in order to prevent a burred part which is formed on the same side of the pipe as a burred part to be processed from interfering with the upper die.
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