FORGING HAMMER SPARE PARTS
t is made of grey cast iron weighing approx. 20 times of nominal capacity of the hammer. It is machined on both top & bottom faces to hold die holder firmly and maintain position of the columns. The die holder fixed in the anvil block is forging from high grade alloy steel all over hardened and it is and it is positioned properly with the help of alloy steel tapered wedge.
Columns, slides and Tup
Cast steel columns duly-annealed and machined are very stiff and robust in construction to ensure longer stability. These are positioned by a large spigot on underside of each foot which fits into a machined recess in the anvil block .The columns are locked with the help of tapered wedges of alloy steel to ensure firm alignment of columns which helps in accurate guiding of tup (made out of EN-9 cast steel.) the clearance between the tup and guide ways attached to columns is maintained with the help of tapered wedge which brings the columns inward and drawback bolt provided on anvil block on which the columns rest. It dampens the induced shock vibrations which increases the life of the tup and also ensures smooth working of the machine for longer period.
Heavy duty gear head fabricated from rolled steel sections is mounted on the columns. The drive is through v-belts from high torque A.C. Electric motor via flywheel and reduction gears to the lifter-shaft, friction lifting system is fitted to lifter shaft which runs on double ball bearing and one central phosphorus bronze bearing which also serves as support to lifter shaft. The friction lifter consists of constantly rotating drum and break lined steel band. This band is anchored at one end to stud in lifter drum and other end is carried by camshaft running though lifter drum which is actuated by lever. The lever is operated with the help of pulling cord tied to lever at one end goes to operating point by passing though capstan bush attached to lifter shaft. When the cord is pulled it tightens on to the rotating capstan bush which operate the lever resulting in tightening of brake around the brake drum with the help of cam shaft. at this stage lifter drum is rotated and tup is lifted with the help of nylon belt provided. On release of cord the spring loaded arrangement help free fall of tup by disengaging friction band immediately from the friction drum. The spring loaded buffer work as a stopper for lifting drum is its rest position. Positive water cooling arrangement is provided to the friction drum to prevent excessive heating.
Salient features of forged products:-
- More strength as grain Structure is improve
- Machining is reduced which helps in material saving
- Most Suitable for mass-production
- Cost effective