Patent ID: 9630252
Date: 2017-04-25
CPC Classifications: B23B,B23C

Claim:
1. A portable pipe outer diameter-chamfering apparatus in which a vertical plate ( 20 ) and a support plate ( 21 ) are fixed in an orthogonal direction to a head ( 12 ) of the apparatus, and the chamfering is performed by a knife-blade ( 11 ) installed between the vertical plate ( 20 ) and the support plate ( 21 ), characterized in that a vertical fixing plate ( 30 ) is fixed to the outside of the vertical plate ( 20 ), a horizontal fixing plate ( 40 ) is fixed in an orthogonal direction to the tip of the vertical fixing plate ( 30 ), a rectangular link with one open side ( 60 ) is coupled to move upward and downward along the vertical fixing plate ( 30 ), a pair of circumscribing rollers ( 65 ) which are in close contact with an outside of a pipe ( 50 ) are installed on both end portions of the rectangular link with one open side ( 60 ), each of the pair of circumscribing rollers ( 65 ) being installed on either side, respectively, the rectangular link with one open side ( 60 ) moves up and down along the vertical fixing plate ( 30 ) by a circumscribing roller adjustment screw ( 61 ) installed on the horizontal fixing plate ( 40 ), a moving body ( 70 ) is installed in the horizontal fixing plate ( 40 ), the moving body ( 70 ) moves up and down by an inscribing roller adjustment screw ( 71 ) installed on the horizontal fixing plate ( 40 ), and an inscribing roller ( 75 ) which is in close contact with an inside of the pipe ( 50 ) and a pressing force of the inscribing roller ( 75 ) is adjusted by a spring ( 77 ) is installed on the moving body ( 70 ).