Tunnel Boring (Shield) Machine
Tunnel Boring Machine (TBM) is used to excavate tunnels with a circular cross section through a variety of soil and rock strata. It uses drilling and blasting (D&B) methods in rock and conventional “hand mining” in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in heavily urbanized areas.
Forging Machine is a machine that changes the shape of metal by the application of localized compressive forces. A forging machine includes an anvil mass and a ram block, to be released and struck against, between which forging is carried out. The machine comprises a damping mass, which experiences the blow and moves in a large amplitude of motion in comparison with the amplitude of motion of the anvil mass, to damp the blows conducted from the anvil mass to the stationary foundation of the machine.
Hydraulic Press Machine
Press Machine is a machine that shapes a workpiece by using pressure. Presses can be classified according to their mechanism, function, structure and controllability. It consists of the press, the hydraulic intensifier, and the auxiliary water tank. A piece of work is compressed between the dies. Numerous shapes of dies may be used. The press head is forced down by hydraulic pressure on the ram in the cylinder, and is lifted by steam pressure under the two pistons in the cylinders. The vertical motion of the press head is directed by the four columns which hold the press firmly against distortion. Water pressure is exerted through the pipe from the steam intensifier. Steam admitted under the piston imparts the pressure to the water.