Internal Grinding Machine

Centreless Grinding Machine models CLG – 80 / 120 / TWIN Grip are heavy-duty  precision centreless grinding machines designed for both, through feed and Automatic in-feed grinding. The Twin Grip principle delivers the highest precision and production output from a compact  grinding machine. Machines are available with Al Oxide, SG, and Diamond Wheels. For high metal removal performances and large batch sizes, CBN Technology is also offered

Prominent Features Include

  • Dual – Bearing support on grinding & regulating spindles (TG Models)
  • Fixed Work Centreline
  • Drive to the spindles is through splined torsion bars to relieve from belt tension loads
  • Diamond and CBN-Capable grinding spindles
  • Computerised control & monitoring (for CNC machines)

Fixed Work Centreline ( TG Models)

  • The basic design of the fixed center line principal in which both the grinding and the  regulating Wheels are adjustable. Grinding wheels slide gives the feed.
  • No adjustment to in and out feed devices is needed to compensate for Wheel Wear.
  • This arrangement also simplifies the fixing of loading/unloading devices for workpieces  and other bar feeding and gauging devices.

Spindle

Double Supported Spindles (TG Model)

Grinding as well as regulating Wheel spindles are supported at both ends by super–precision  NNK bearing, along with highly accurate angular contact bearing for thrust load. The arrangement provides the highest rigidity during grinding to ensure accurate and uniform  workpiece finish tolerances. Drive to the spindles is through splined torsion bars, which relieves belt tension loads.

BED

The machine bed is a heavy box structure type, heavily reinforced by ribs which ensure high  rigidity and stability. An ample Gradient is provided for the free flow of chips and coolant  Symmetrical grinding geometry is assured by the elimination of dynamic forces through the  base.

Wheel slides: Both the wheel slides move on high precision turcite / antifriction (optional) guideways  ensuring stick slip-free movement, high sensitivity, and accurate positioning, and high  rigidity

AUTOMATIC INFEED SYSTEMS

The infeed slide is moved by a precision ground lead screw ( ball screw for CNC version ). It is  driven by a hydraulic motor(Ac Servo motor for CNC version ).

The automatic plunge feed cycle operates as follows. The rapid approach, preselected Coarse  and fine feed, sparking off for the preset timing on an adjustable timer, quick Return.

DRESSER SLIDE

The dressing Slides move hydraulically on turcite / antifriction linear guideways and copy the  templates profile in the case of a hydraulic machine. Wheel dressing is done through servo motors for CNC machines. For mass production applications diamond roll dressing is done to  reduce dressing time and to achieve better accuracies.