Features

CNC Grinding Machine

• This 3-axis CNC grinding machine is designed for to edge and polish shape glass such as automotive glass.
• The machine base is fabricated from heavy structural steel for ruggedness and rigidity. In order to remove all stress, the base is normalized after fabrication. The base is then sandblasted, precision machined, drilled and tapped so that it is perfectly fit for other parts and components.
• Mounted on the top surface of rear of base structure are precision linear motion slides which form the "Y" axis. This axis controls the linear motion of the grinding spindle. Linear motion of the slides is controlled by an AC servo motor and a directly coupled, ball type lead screw. The lead screw, in turn, is coupled to the spindle carriage by zero backlash ball screw nuts.
• Mounted to the top surface of front of base structure, perpendicular to the "Y" axis, are precision linear motion slides which form the "X" axis. This axis controls linear motion of vacuum table which holds the glass especially when it is being grinded. Linear motion of this slide is also controlled by a ball type lead screw and zero backlash ball screw nuts which are attached to the work table. Lead screw is powered by an AC servo motor.
• Lead screws on both the "X" and "Y" axes are mounted in pre-loaded, angular contact, high thrust type bearings to eliminate all end play. The linear motion slides on both the "X" and "Y" axes are covered by a pan or guard arrangement to protect them from contaminants. Mounted on the spindle carriage assembly ("X" axis) is a precision grinding spindle directly coupled to a high power AC driven motor.
• The spindle consists of a cylindrical type housing and spindle shaft. Both components are precision machined for accuracy. The spindle shaft and wheel mounting components are balanced to eliminate vibration. The spindle shaft is mounted in the spindle housing on two pairs of Duplex, precision, angular contact, ball bearings installed back to back. Bearings are pre-loaded to eliminate end play. O-ring type seals are used on non-moving spindle parts to protect the spindle bearings. Labyrinth seals are used on the moving parts for protection. The spindle and motor assembly slip into and are attached to an outer housing which is a part of the carriage assembly. The spindle may be removed from this housing by unbolting a clamp ring which secures it to the housing.
• Also attached to the housing that holds the spindle is a vacuum type coolant guard assembly and rotating mechanism. This assembly consists of the necessary components, bearings, seals, gears and an AC servo motor to rotate the guard to keep its slotted opening tangent to the point of grind.
• The vacuum coolant guard also contains a coolant ring which directs coolant to diamond wheel. When grinding, coolant is piped to the ring from an external supply. The guard is also supplied with an outlet to which a vacuum source is attached. This vacuum source causes an inrush of air through the slotted portion of the coolant guard. The inrush of air keeps coolant inside the guard and ultimately returns it to its source through the mist collection system.
• The rotating feature of this assembly comprises the third axis of the machine.
• The diamond wheel is mounted on a motorized, balanced, variable speed spindle; the spindle is fitted with one diamond wheel.
• The CNC electrical cabinet consists of all components necessary to control the system. In the main enclosure is housed the CNC controller, servo amplifiers and an adjustable AC frequency motor drives and other components necessary for manual and automatic operation of the system. The CNC controller is a dual CNC continuous path control that controls the X, Y and Z (coolant guard rotation) axes.
• Servo amplifiers are used to control servo axes motors. Frequency converters are used to control RPM of grinding spindles.
• PLC will control the non-motion functions of the CNC and the shuttle. It will also interface with the line control panel to insure automatic sequencing of the line. In the doors of the panel will be push buttons and selector switches that allow manual and automatic control of the CNC Grinder.
• The machine is equipped with a vacuum coolant guard designed for different diamond wheels diameters. A coolant and mist collection system is equipped to keep coolant off the glass and the machine. The collector consists of a high power vacuum blower and a separation chamber. The air and coolant enter the chamber at the lower third portion of the chamber in a downward direction. The coolant is collected at the bottom of the chamber and air is released out from top. No filter media is required and the mist collection system is enclosed with sound proof material. A coolant drain tank and pump are included. Diamond wheel for test run is to be provided by Buyer.