. Railway mechanical engineer . Fig. 6—View Showing Vertical Press and Hammer Swager the brake shaft is to upset section D 1^4 in. in diameter by334 in- long using extension dies, half of which are shownin Fig. 7. These dies are secured in the forging machine insuch a way that the upper part extends above the machine,allowing brake shaft end A to extend over the top of themachine so that a second upsetting operation can be per-formed at U. In Fig. 7 .4 is the moving die and B the fixeddie. A and B are held in alignment by two pins and sep- Decemhkk. 1921 ME( II VNICAL ENGINEER 771 arat
. Railway mechanical engineer . Fig. 6—View Showing Vertical Press and Hammer Swager the brake shaft is to upset section D 1^4 in. in diameter by334 in- long using extension dies, half of which are shownin Fig. 7. These dies are secured in the forging machine insuch a way that the upper part extends above the machine,allowing brake shaft end A to extend over the top of themachine so that a second upsetting operation can be per-formed at U. In Fig. 7 .4 is the moving die and B the fixeddie. A and B are held in alignment by two pins and sep- Decemhkk. 1921 ME( II VNICAL ENGINEER 771 arated after each stroke by the two springs shown betweenthem. In operation the brake shafttion and a similar j>air of dies is heated at the correct loca- i nme against dies .1 and B,. Fig 7—Extension Dies for Forming Second UpsettingOperation on Brake Shafts gripping the stock firmly. Die A then, in conjunction withits mating half, moves up to die B, compressing the heatedportion of the brake shaft into cylindrical cavity C. It will
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
