SURFACE & PROFILE GRINDING SEMIAUTOMATIC MACHINE WITH CNC OSH-620F3

    Machine arrangement.
   The machine base is the bed on which compound slide, column, cross feed mechanism are installed.
 Machine compound slide provides longitudinal and cross travel of table on which electromagnetic chuck and contour dressing by rotating diamond roller mechanism are installed.
   All driven elements traveling is realized over steel hardened guide ways on rolling contact bearings.
   Vertical travel of wheel head is realized over column guide ways by vertical feed mechanism through reducer.
 Table which travels by means of hydraulic cylinder is installed onto longitudinal guide ways of compound slide. Vertical travel of wheel head, cross travel of table is realized by ball-screw pairs. Hydraulic equipment is fulfilled as a separate unit and installed to the right of the machine and cooling system is to the left. Electric automation cabinet with CNC system is located from the right side from the front.
    CNC system provides:
- simultaneous control over coordinates Y, Z axes;
- axes independent functioning;
- linear and circular interpolation over programmable axes;
- support of grinding wheel constant linear set speed of cutting in case of its tear and wear.
   Description of machine units.
   Bed.
  Machine bed is an iron casting of box form and is a foundation for machine units installation. On its top pads rolling guide ways for compound slide travel are fastened and column is installed. Right guide way is flat, it perceives vertical loads and left U-form guide way perceives vertical as well as horizontal loads.
  Cross feed mechanism is installed on the front wall of bed, to the left on side surface there is a cross stroke limitation mechanism. Protection of cross guide ways is realized by shields.
   Column.
   Column provides vertical travel of wheel head over closed rolling guide ways.
  Guide ways of surface are formed by column itself and bars screwed to its front surface. Front and rear window of column are protected by set of shields traveling in slots of side bars.
   Micro switch is installed in top part of column for limitation of wheel head travel. Vertical feed mechanism is installed on lower surface of column.
    Left cross guide way. 
  Left cross guide way is of U-form in section and perceives vertical and horizontal loads. Guide way with rollers is assembled with preload. Side tension of rollers is created by wedge with its following fixation.
    Compound slide
   Compound slide provides cross travel of table. Upper guide ways (V-shaped and flat ones) serve for longitudinal travel, and lower U-shaped and flat ones are for cross travel. Bracket of cross feed mechanism nut is fastened to the lower pad of compound slide. Hydraulic cylinder is installed between upper guide ways. Converter of linear travel is fastened on brackets on front and rear walls of compound slide.
     Table
     Table has a working surface with three T-shaped slots on which attachment (or electromagnetic chuck)  and dressing mechanism is installed. At the bottom there are V-shaped and flat rolling guide ways for longitudinal travels. Wings for compound slide guide ways protection are fastened to side walls of table. Collecting coolant –lubricant from table takes place in lower place and discharge  - through aperture in rear wall of table into collector and then to cooling tank.
      Cross feed mechanism
    Cross feed mechanism realizes cross travel of compound slide  and is fastened on the front wall of bed. Torque from electric motor is transmitted through coupling to screw - rolling nut gear which is connected with compound slide by means of bracket.
      Enclosure
    Enclosure of machine is a welded frame installed on the table and designed for protection against coolant-lubricant splashing during work. Enclosure of two types can be installed:
- lower tray with frame and set of prefabricated shields;
- skeleton sheeting with closed top and movable sliding door of cabinet type.
      Wheel head
  Wheel head consists of cast-iron molded case with vertical guide ways and spindle installed in bushing. For providing the gapless connection, the bushing is covered with epoxide compound in body along the diameter. Spindle is installed on high precision thrust rolling bearings assembled with preload. Rotation from electric motor through half-couplings and drive shaft is transmitted onto wheel head spindle. Bar with fastened on it linear travels converter is installed in the rear part of body.
      Dressing mechanism
     Grinding wheel dressing over profile is fulfilled on the machine by means of dressing mechanism. Mechanism is installed to the right on the machine table and consists of body (or two bodies) in which  spindle is mounted on high precision bearings. Diamond roller is installed on spindle face, roller rotation drive is from electric motor through belt transmission. Caves of bearings are protected from coolant-lubricant and abrasive ingress by a cup.
      Grinding wheel flanges                      Grinding wheel is installed between flange faceplate through gaskets which are tied by screws.
    Grinding wheel balancing is realized by moving balance weights in the slot of the front flange.  Grinding wheel flanges are installed on wheel head  spindle cone and tied by screw.