Ginder often meets problems and solutions

Table of Contents

A cylindrical grinding machine is the workpiece processing cylindrical, conical, or another shape of the outer surface and the end face of the shaft shoulder grinding machine; The most widely used, can process a variety of cylindrical conical outer surface and shaft shoulder end face grinders.

In all grinding machines, cylindrical grinding machine is the most widely used type of machine tool, it is generally composed of the base part of the cast iron bed, workbench, bearing and driving workpiece rotation of the head frame, tail seat, installation of grinding wheel frame (grinding head), control workpiece size of the transverse feed mechanism, control machine tool moving parts of the action of electrical and hydraulic devices and other main components. The cylindrical grinding machine can be divided into an ordinary cylindrical grinding machine, universal cylindrical grinding machine, wide grinding wheel cylindrical grinding machine, end face cylindrical grinding machine, multi-wheel frame cylindrical grinding machine, multi-disc grinding wheel cylindrical grinding machine, cut type cylindrical grinding machine, and special cylindrical grinding machine.

The main engine is composed of a bed, head, tail, grinding head, dust transmission device, and other components. Head, the grinding head can rotate Angles, and is used for grinding thimble and roller chamfering special fixtures, dynamic balancing frame, and roller detector three parts by customer order.

Influencing factor of accuracy

1. Influence of height of the grinding head, head frame, and tail seat on the dimensional accuracy of the workpiece. The equal height error of the grinding head, head frame, and tail seat will make the center line of the grinding head frame and tail seat offset with the spindle axis of the grinding wheel in space, and then the surface of the grinding workpiece will be a hyperboloid.

2. Influence of the center line of the head frame and a tail seat on the parallelism error of the grinding head spindle axis in the horizontal plane on the workpiece dimensional accuracy. When this error occurs, the shape of the workpiece ground by the cylindrical grinder will be a cone, that is, the grinding wheel is angular, and the surface has a spiral grinding grain.

3. Influence of grinding head movement relative to perpendicularity error of machine guide rail on machining accuracy. The final result of this error is that the spindle axis and the head frame, tail seat center line offset, in grinding the shoulder end face, will cause the vertical error of the shoulder end face and the workpiece axis. When grinding the outer circle, the surface roughness will be affected, resulting in a spiral abrasive grain.

Grinder common problems and solutions:

1, processing workpiece surface produce transverse lines, ripples, processing, and grinding when low and medium frequency vibration sound.

Reason 1: The surface of the grinding wheel is uneven. After grinding the workpiece for a long time, the surface of the grinding wheel will be attached to a large number of iron filings. During grinding, the surface of the grinding wheel will be worn, resulting in an uneven surface of the grinding wheel.

Solution: Use a diamond dressing pen to polish and correct the grinding wheel to make its surface even and smooth.

Cause 2: The grinding wheel is unbalanced. Uneven quality may occur when the grinding wheel is delivered or used.

Solution: The grinding wheel should be balanced before use. The special balancing shaft and balancing frame should be used to balance the grinding wheel, and the counterweight on the grinding wheel frame should be adjusted to balance the grinding wheel. A grinding wheel may need to be balanced several times during use.

Cause 3: The center hole of the workpiece is too large. In the actual processing, the center hole of the workpiece will often become larger, when the center hole of the workpiece becomes larger, the grinding machine thimble can not be stable against the workpiece, the workpiece will shake in the rotating processing caused by horizontal.

Solution: Machining the center hole of the workpiece to reduce the center hole.

2, grinding machine table can not move horizontally how to do?

Reason 1: The hydraulic oil pump of the grinder is blocked, resulting in the failure to reach the normal oil pressure, resulting in the inability to move from side to side.

Solution: It can be solved by cleaning the filter screen of the oil pump. At the same time, it is necessary to observe whether the position of the hydraulic oil level in the grinder can be reached. If the position of the hydraulic oil is too low, it is necessary to increase the hydraulic oil. If the oil pump does not have a filter, it is necessary to add a filter device to prevent dirty things from entering the hydraulic oil pump.

Reason 2: Switch inductor moving from left to right of grinder is blocked, resulting in switch failure.

Solution: disassemble the switch, clean the sensor valve, and install it.

3. What if the grinding wheel of the main shaft of the grinder cannot move forward or backward?

Cause 1: The solenoid valve pump is blocked.

Solution: Clean the solenoid valve pump, the solenoid valve is generally located behind the grinder, is the main shaft before and after the switch, if the solenoid valve failure, will lead to before and after can not move.

Cause 2: The lead screw of the spindle grinding wheel fell off. During transportation or movement of the machine, the spindle may fall off from the lead screw, resulting in the failure to drive the spindle grinding wheel when the lead screw rotates.

Solution: Lift the spindle grinding wheel, observe the position of the lead screw and screw, and reinstall it.

Cause 3: The oil pump is blocked. The blockage of hydraulic oil pump will cause the spindle grinding wheel to slow down or not move, which is divided into the blockage of oil pump filter screen and the damage of oil pump.

Solution: Clean the filter of oil pump or replace the oil pump.