Device for cooling the bits of a cutting machine

Patent · Tue Mar 26 04:00:00 EST 1985

OSTI ID:5487288

Zitz, A; Schetina, O; Wrulich, H

The bits of a cutting machine are subjected with water under pressure by means of nozzles, water supply to the nozzles being given free by a valve cone as soon as the bit within the bit holder is shifted in axial direction against the force of a spring. Axial movement of the bit is effected by the cutting pressure and the shifting path of the bit is transmitted to the valve cone via a coupling member. The force of the spring is rated such that the spring presses the bit against its own weight and against the internal frictional resistances into its starting position in non-loaded condition with simultaneous closing of the valve cone. The restoring forces are, with connected conduits for pressurized water, substantially greater than the spring force, the active surface of the valve cone acted upon by the water pressure in closing sense determining the force above which opening of the valve becomes possible. The valve is only opened above a minimum hardness of the rock and thus above a predetermined lower limit for the cutting pressure.

• Assignee: Voest Alpine Aktiengesellschaft (Austria)
• Patent Number(s): US 4506932
• OSTI ID: 5487288
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
COMPRESSIBLE FLOW
CONTROL
CONTROL EQUIPMENT
COOLING SYSTEMS
CUTTING TOOLS
ENERGY SYSTEMS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
HYDROGEN COMPOUNDS
JETS
LIQUID FLOW
NOZZLES
OXYGEN COMPOUNDS
PRESSURE CONTROL
TOOLS
VALVES
WATER