SEMI-AUTOMATIC INTERNAL GRINDING MACHINE WITH CNC OSH-686F3

The machine has a layout with moving wheel head in the transverse direction, longitudinal movement of the workhead relative to the axis of the grinding wheel and the rotation of the workhead spindle. The processed part is installed in the work head cartridge. A support cradle can be installed on the machine table. The part is installed manually.

All working bodies are moved by means of ball-screw pairs. The base of the machine is the bed on which the main components and mechanisms are installed. A longitudinal table is installed on the rolling guides of the bed. There is a cross table on the cross - beam guides, and there also fixed:
- longitudinal and cross travels mechanisms; 
- mechanism of longitudinal travels limitation; 
- the mechanism of reference and limit of the transverse travels;
- fencing of the working area. 
   The cross table provides a cross movement of the headstock of the grinding spindle installed on it. Movement is carried out on steel hardened linear rolling guides by means of a backlash-free high-precision ball-screw transmission.
   The grinding wheel periphery dressing is carried out with a dresser diamond dresser, the device for dressing is fixed on the longitudinal table.

 Surface treatment and dressing of the grinding wheel is performed automatically according to the control program, installation and removal of the part are carried out manually. The machine automatically compensates for the amount of removal of the profile of the grinding wheel during dressing.

On the rolling guides, a longitudinal table is moved, which performs an oscillatory movement with the possibility of stepless and precise supply. An upper turntable is installed on the longitudinal table. On the working surface of the longitudinal table, the work head and the supporting rest are installed. The upper table can be rotated horizontally at an angle of ±2°. The work head can be rotated at an angle of -7°...+8°. 

A hydraulic three-cam self-centering chuck with replaceable cams can be used to install parts.     

The hydraulic lubrication station and coolant tank are installed behind the machine.

   The working area of grinding is protected by cabinet-type protection, the front wall of the protection has a movable opening door with plexiglass.

In front, to the right of the machine, there is a CNC control panel. The Siemens Sinumerik 802Dsl CNC system must provide the following machine capabilities: 

  - part processing by rotating the workpiece and moving the wheel head;

-       maintaining the set value of the cutting speed and the set speed of the workpiece. 

For the convenience of the operator, a universal technological program is installed on the machine. In the dialog mode, using special "masks", the operator sets:
- the dimensions of the surface to be processed;
- removable allowance;
- finishing allowance;
- values of roughing and finishing feeds and speeds;
- number of sparkling sessions;
- parameters and number of the grinding wheel dressings during processing.