Feilong Model 1500 Hydraulic Polishing Machine

1.Scope of Application and Performance Characteristics

The Feilong Model 1500 Hydraulic Grinding Machine is primarily designed for grinding and fluting the milling rolls used in flour mills;it is an essential piece of specialized equipment for such facilities.

The Feilong Model 1500 Hydraulic Grinding and Fluting Machine consists mainly of a machine bed,worktable,vertical column,grinding wheel assembly,hydraulic system,and electrical and drive mechanisms.The machine bed utilizes a composite guideway system,and the grinding wheel is positioned perpendicular to the worktable surface;this configuration enhances workpiece stability during operation and ensures machining precision.The worktable is driven hydraulically,while the grinding wheel,milling roll,and hydraulic pump are each powered by independent electric motors.Controls—such as operating levers and electrical buttons—are centrally located on the front of the machine,ensuring convenient,flexible,and safe operation.

2.Structure of Major Components

2.1 Machine Bed

The machine bed features a box-type structure reinforced with internal transverse ribs,resulting in a rigid design with minimal deformation under load;this rigidity improves the machine's overall accuracy and ensures the precision of the machined parts.The bed surface utilizes a V-flat composite guideway system,with two oil rollers and two oil reservoirs on each guideway surface to ensure proper lubrication.A hydraulic cylinder,positioned parallel to the guideway surfaces,is installed within the bed.Components such as the vertical column and the lifting cross-arm are mounted onto the machine bed.

2.2 Worktable

The worktable surface features two T-slots for mounting the milling roll support brackets and the roll drive mechanism;the support brackets can be adjusted to accommodate milling rolls of varying lengths.Hydraulic pressure drives a piston to move the worktable in a reciprocating motion along the bed's guideways.

Two trip dogs are installed in the T-slot on the front side of the worktable to control its travel distance,which is adjusted according to the length of the milling roll.When a trip dog contacts the reversing switch mounted on the side of the machine bed,the switch changes state,thereby controlling the hydraulic circuit to reverse the direction of the worktable.2.3 Lifting Cross-arm,Grinding Wheel,and Tool Holder

The column supporting the cross-arm is mounted on the housing at the rear of the machine bed and secured with bolts and locating pins.The cross-arm clamps around the column and is fastened with bolts.A grinding wheel is mounted on one side of the cross-arm,while the upper section connects to a lifting cap.A lifting screw is housed inside the column;its lower end connects via a pair of bevel gears to a horizontal shaft(equipped with a handwheel)that spans the machine bed.The gear system drives the lifting screw,causing the lifting cap and cross-arm to move vertically,thereby adjusting the cross-arm height(adjustable range:175 mm)and the grinding feed.A crank handle is used for rapid vertical movement,while the handwheel is used for slow vertical movement or grinding feed.See Figure 1 for details.

To hoist the roller,first release the locating pin between the cross-arm and the column,loosen the clamping nuts and bolts securing the cross-arm,and rotate the cross-arm 90°clockwise(viewed from above).When ready for grinding,rotate it 90°in the opposite direction(counter-clockwise),then position and lock it.To ensure operational safety,the cross-arm is equipped with a limit mechanism that restricts rotation to 180°,preventing continuous 360°rotation.

One side of the cross-arm houses the grinding wheel bracket,which supports the grinding wheel spindle,bearings,V-belt pulley,and grinding wheel.Adjustment screws 1 and 2 are installed at both ends of the spindle.Screw 1 prevents axial movement of the spindle,while screw 2 adjusts the clearance between the spindle and the bearings(see Figure 2).

The grinding wheel is driven directly by a motor mounted on the lifting cap;V-belt tension is adjusted using the four screws on the motor mount.

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2.4 Grinding Roller Drive Unit

This unit drives the grinding roller during the grinding process.It consists of a motor mount,a speed-reducing belt drive(or universal joint assembly),and a universal joint.To operate,simply secure the motor mount to the machine table near the indexing head and fit the universal joint onto the grinding roller shaft.The motor drives the grinding roller through the speed-reduction mechanism.

2.5 Machine Tool Electrical System

The machine is equipped with three motors:the grinding roller drive motor,the grinding wheel motor,and the gear pump motor.While the other two motors are permanently connected,the grinding roller drive motor requires its plug to be inserted into the socket on the front-left side of the machine bed before it can be started.The control buttons for each motor are conveniently located on the front-right side of the machine bed.

To start the machine,first turn on the main control power switch,then start the motors in sequence.To stop the machine,simply press the master stop switch after the grinding wheel or tool has disengaged from the workpiece.