ECG630X4000 External Cylindrical Grinding Machine

General description:This model ECG630 x 4000 heavy-duty external cylindrical grinding machine carries 3000 KG workpiece. It features a simple and compact structure, T-shaped layout, and easy operations. It is a general-purpose grinding machine used for grinding external cylindrical/tapered surfaces on axis-symmetrical work pieces. Due to its easy operations and efficiency on performance and productivity, this external cylindrical grinding machine is widely used in the single-piece, small-batch or mass production in workshops.Main structuresThis external cylindrical grinding machine consists mainly of the machine bases, the worktable, the work head, the tailstock, the grinding wheel head, the cross feeding mechanism, the hydraulic system, the cooling system, the lubrication system and the electrical system.  1. Machine basesHeavy machine base of T-shaped layout on this cylindrical grinding machine is made of high-density and fine-grained grey cast iron through the resin sand casting process. It is properly heat-treated to eliminate its internal stress to the minimum so that it is free from distortion in the long-term operation. It provides a rigid base to support all the units and features high stiffness and adequate length to support the worktable on all positions. 1.1 Grinding wheel head base & bed waysa) "V-Flat" type bed ways for optimum stability and rigidity;b) Hydrostatically-lubricated bed ways provide almost friction-free movements for the grinding wheel head, ensuring the long-term stable & precision feedings. The lubrication pressure stabilizer is mounted in the rear of the grinding wheel head. The lubrication pressure in each oil cavity on the bed ways can be adjusted independently in order to achieve the same floated up height for the grinding wheel head along the bed ways.1.2  Worktable base & bed waysa) "V-Flat" type bed ways for optimum stability and rigidity;b) Hydrostatically-lubricated bed ways provide almost friction-free movements for the worktable mounted on top of it. The oil cavities evenly spread along the length of the bed ways, with each oil cavity can have its pressure independently adjusted to achieve the same floated up height for the worktable along the bed ways;c) Stainless steel made telescopic covers will be fitted on both ends of the worktable to prevent the swarf from clogging the engagement between the worktable and the bed ways.2. Worktablea) It consists of the upper table and the lower table which are positioned and assembled with positioning pins and pressing bars at the both ends. The upper table swivels counter-clockwise up to 2 Degrees and clockwise up to 1 Degree. When the upper table is swiveled, its swiveling angle is observed on the graduated scale. For micro adjustments for the angles, the dial test indicator can be used;b) The worktable longitudinal movements can be actuated steplessly at variable speeds by the hydraulic forces or be driven with hand wheel. The engagement between the lower table and the bed ways is hydrostatically-lubricated to obtain almost friction-free movements for the worktable, thus the machine's operation life-span is greatly extended. The oil cavities evenly spread along the bed ways, during grinding operations, receive pressured lubrication to slightly float up the worktable to an even height in the longitudinal direction. The lubrication pressure of each oil cavity can be adjusted independently to ensure the worktable to be floated up to the same height throughout its whole length;c) Underneath the lower worktable, the hydraulic cylinder and the gear rack are furnished for worktable's hydraulic driving and hand-wheel driving.3. Work heada) The work head is box type and fixed on the worktable with two M30 bolts. A Metric #80 dead center is inserted in its spindle nose bore to offer very rigid supporting for workpieces in order to improve the grinding performance. It is usually located at the left end of the worktable, but can also be moved to any desired positions along the longitudinal direction on the worktable by driving the hexagonal pin;b) A variable-frequency motor is mounted on the work head to drive the spindle, thus the spindle speeds can be conveniently adjusted in a range of 10 - 100 RPM through operating the variable-frequency converter which drives the spindle motor. A tailstock mounted on the worktable holds the work pieces together with the work head. It can be moved and located on any position along the worktable;c) The work head spindle speeds are infinitely variable within three speed phases for easily selecting suitable speeds according to the material of workpieces to be ground. The shift between different speed phases is carried out by changing the set of engaging pulleys at the rear of the work head. An interlock safety switch is furnished on the pulley hood which, when the pulley hood is opened, will shut off the power supply to the work head motor to ensure the personnel safety.4. Tailstocka)  The tailstock is