surface grinder for installation and dressing skills and tips of grinding

（1） Skills and know-how of installation and disassembly of grinding wheel for surface grinder

1. Installation skills of grinding wheel

The M7120D surface grinder adopts a flat grinding wheel with a diameter of 50 mm. The characteristics of the grinding wheel are basically the same as that of the cylindrical grinding wheel. Special socket wrench is used for installation and disassembly of grinding wheel (see Figure).

Installation steps and techniques are as follows:

(1) Clean the outer cone of the spindle of the grinding head frame and the taper hole of the flange plate of the grinding wheel.

(2) Put the grinding wheel chuck that has been installed and statically balanced onto the spindle and push it tightly.

(3) Install the special washer.

(4) Screw the fastening nut onto the spindle (left turn).

(5) Use a special socket wrench (hexagon socket) to partially cover the fastening nut, and use a hammer to knock it anticlockwise to fasten the grinding wheel on the spindle of the machine tool.

(6) Close the door of the grinding wheel cover and trim the grinding wheel.

2. Disassembly skills of grinding wheel

(1) Open the door of the grinding wheel cover, use a special socket wrench (hexagon) to cover the tightening nut of the spindle of the machine tool, knock the wrench clockwise (the rotation direction of the grinding wheel) with a hammer, and remove and tighten the nut and washer.

(2) Screw the external thread part of the special socket wrench into the screw hole of the grinding wheel chuck according to the rotation direction of the grinding wheel.

(3) Knock the wrench with a hammer to remove the grinding wheel and chuck from the machine-made spindle.

（2） Skill of dressing grinding wheel with wheel dresser on slide plate

M7120D surface grinder is equipped with a fixed wheel dresser on the slide plate, and the grinding wheel can be dressed by moving the grinding head. The advantages of this method are that it is easy to use and the diamond does not need to be disassembled frequently; the disadvantage is that the dressing accuracy is low (see Fig. 4).

Figure 4 remove the grinding wheel with a special socket wrench Figure 5 use the wheel dresser on the sliding plate to trim the grinding wheel handle

The repair steps and tips are as follows:

(1) Install the diamond on the grinder wheel dresser and fasten it.

(2) Move the grinding head so that the diamond is within the width of the grinding wheel.

(3) Start the grinding wheel, rotate the hand of the wheel dresser to make the sleeve slide in the shaft sleeve, and the diamond is fed to the circular surface of the grinding wheel.

(4) When the gold stone contacts the grinding wheel circumference, stop the dresser feed.

(5) During reversing dressing, pull out or push forward the reversing handle 5 of grinding head to make the grinding head move reversely, and rotate the hand of grinding wheel dresser to feed according to dressing requirements. 0.02-0.03mm for rough dressing and 0.005-0.01mm for finishing.

(6) After finishing, quickly and continuously retreat the grinding head to the edge of the table.

(7) Rotate the wheel dresser handle in the opposite direction (counter clockwise) to move the diamond away from the dressing position.