Jig grinder with precision coordinate positioning device for high precision Cylindrical Grinding pitch precision holes and forming surface grinder. Jig grinders and jig boring machine has the same structure and layout, the difference is replaced by a high-speed spindle boring tool grinding. Grinding, the workpiece can be fixed according to coordinate positioning mobile workbench, in addition to high-speed rotation of the outer wheel, through planetary transmission mechanism for slow revolution, and can make a vertical feed motion. Change the radius grinding planetary motion, enabling radial feed. Grinding is usually high frequency electric or air turbine grinder grinding. Jig grinder grinding cylindrical bore in addition to, but also inner and outer surfaces and tapered circular grinding holes, etc., mainly used for machining hardened workpiece, die and die and so on. Install plug in the grinding head grinding attachment, the wheel axis in a horizontal position, the wheel does not make planetary motion but only up and down reciprocating motion, can be similar to the form of slotting grinding to machining ring gear, and the cam indexing plate, etc. . With digital control technology, jig grinders have been able to grind various shaped surfaces.
The actual Cylindrical Grinding machine generally required strong magnetic field generated by the electromagnetic coil is excited , and the weight of the electromagnetic coil , the volume is much greater relative to the permanent magnets .
Rotary magnetic field , to solve rotary movement around the magnetic abrasive for back support , so that the workpiece and the magnetic poles do not need to make high-speed rotary motion . For long pipe processing , the workpiece not suitable for high-speed rotation , the rotary movement generally used permanent magnet poles , but the permanent magnet is generated in the processing region of the magnetic induction strength of only 0.3-0.4T. Grinding trajectory required should be periodic, uniform , non- dominant direction .
In order to obtain the above abrasive trajectory, to increase the axial reciprocating movement. For the inner surface of the grinding, magnetic abrasive Unlike mechanical grinding. - Centerless grinders
The magnetic pole of the magnetic abrasive grains is driven by means of a magnetic pole space relative hysteresis . Due to relative axial movement is a reciprocating magnetic grains relative to the workpiece displacement is much smaller than the pole movement relative to the workpiece . To get a good grinding trajectory angle , the entire organization to be bigger displacement .
