Device for grinding end surfaces of billet

Abstract

Billets 3 are fed to billet carrying equipment 2 through billet loading equipment 28. With actuation of a first truing-up equipment the grinding apparatus of billets at both end faces 1 , the billet placed on a tray 23 is trued-up to the side of a first grinding equipment for working on planar portions 4 A. With actuation of the first grinding equipment for working on planar portions 4 A, working on the planar portion in one end face of the billet 3 is performed by a grinding belt 46. The billet is carried through billet carrying equipment 2 to the position of working of a first grinding equipment for chamfering 5 A. With actuation of a second truing-up equipment, a truing-up guide is pushed to cause the billet on the tray 23 is trued-up to the side of first grinding equipment for chamfering 5 A.

1 . A grinding apparatus of billets at both end faces comprising:
 a machine base,
 a billet carrying equipment that is provided on the machine base and carries a plurality of trays placing cut billets thereon from a feeding side to a discharging side, 
 a first minding equipment for working on planar portions that is provided on the machine base and performs working on the planar potion in one end face of a billet with a first circulating endless grinding belt for working on planar portions, 
   a second grinding equipment for working on planar portions that is provided on the machine base and performs working on the planar potion in the other end face of the billet with a second circulating endless grinding belt for working on planar portions,   a first grinding equipment for chamfering that is provided on the machine base and performs working of chamfering on the circular edge portion in one end face of a billet with a first circulating endless grinding belt for chamfering,   a first lifting equipment that is provided on the first minding equipment for chamfering and performs lifting movement of the first endless grinding belt so as to be attached to and detached from the billet,   a second grinding equipment for chamfering that is provided on the machine base and performs working of chamfering on the circular edge portion in the other end face of the billet with a second circulating endless grinding belt for chamfering, and   a second lifting equipment that is provided on the second grinding equipment for chamfering and performs lifting movement of the second endless grinding belt so as to be attached to and detached from the billet.   
     
     
         2 . The grinding apparatus of billets at both end faces according to  claim 1 , wherein:
 the first grinding equipment for chamfering is disposed adjacent to the first grinding equipment for working on planar portions towards the discharging side,   the second grinding equipment for working on planar portions is disposed adjacent to the first grinding equipment for chamfering towards the discharging side, and   the second grinding equipment for chamfering is disposed adjacent to the second grinding equipment for working on planar portions towards the discharging side.   
     
     
         3 . The minding apparatus of billets at both end aces according to  claim 1 , wherein:
 the billet carrying equipment carries horizontally a plurality of trays placing cut billets thereon from the feeding side to the discharging side, and   the first endless grinding belt for working on planar portions and the second grinding belt for working on planar portions are composed so as to be inclined so that the discharging side is higher than the feeding side.   
     
     
         4 . The grinding apparatus of billets at both end faces according to  claim 1 , wherein:
 the movement direction of the billet carrying equipment crosses the movement direction of the grinding faces of the first endless grinding belt for working on planar portions and the second endless grinding belt for working on planar portions with an acute angle.   
     
     
         5 . The minding apparatus of billets at both end faces according to  claim 1 , wherein:
 the billet carrying equipment has a position detecting means that detects the carrying position of the tray for causing the first lifting equipment and the second lifting equipment to make up-down movement of the first endless grinding belt for chamfering and the second endless grinding belt for chamfering, to make a lifting movement respectively.   
     
     
         6 . The grinding apparatus of billets at both end faces according to  claim 1 , further comprising:
 a first truing-up equipment that is provided in the billet carrying' equipment and carries the billets on the trays such that the billets are trued-up on one side of the carrying course of the billet carrying equipment, and   a second truing-up equipment that is provided in the billet carrying equipment and carries the billets on, the trays such that the billets are trued-up on the other side of the carrying course of the billet carrying equipment.