Before starting the internal grinder, it is necessary to carry out a comprehensive inspection on the machine tool carefully. In use, the effective inspection includes the inspection of control mechanism, electrical equipment, magnetic chuck and other fixtures. After the inspection, it shall be lubricated, and the test run shall be carried out after lubrication. It can only be used after confirming that everything is in good condition. When clamping the workpiece, attention should be paid to the clamping and clamping. In the grinding process, the loose workpiece will cause serious consequences such as flying out of the workpiece, injuring people or crashing the grinding wheel.
When the internal grinder starts to work, the manual adjustment method should be applied to make the grinding wheel closer to the workpiece slowly, and the starting feed rate should be small. Excessive force is not allowed to prevent collision with the grinding wheel. When it is necessary to control the reciprocating motion of the worktable with the iron stopper, it is necessary to adjust it accurately according to the grinding length of the workpiece, and tighten the retaining iron firmly. When replacing the grinding wheel, the appearance inspection must be carried out to see if there is any trauma, and then the wood hammer or stick is used to knock, and the sound is required to be clear and clear without cracks. When installing the grinding wheel, it must be assembled according to the specified methods and requirements. After the static balance debugging, the grinding wheel can be used only after it is installed and tested. Workers should wear protective glasses during work, and wheel dressing should be carried out in a balanced manner to prevent impact.
The internal grinder should measure the workpiece, adjust or wipe the machine tool after shutdown. When using magnetic suction cup, the disk surface and workpiece should be wiped clean, close and firmly absorbed. If necessary, iron block can be added to prevent the workpiece from shifting or flying out. It is necessary to install the protective cover or baffle of the grinding wheel, and the standing position should be over the front of the high-speed rotating grinding wheel.
According to the motion characteristics and process requirements of grinder, the following requirements are required for electric drive and control:
1. Generally, the rotation of grinding wheel does not require speed regulation, but can be driven by a three-phase asynchronous motor, and only one-way rotation is required. When the capacity is large, the Y-triangle can be used to start.
2. In order to ensure the machining accuracy, make it run smoothly, and ensure that the worktable has small inertia and no impact when reversing, hydraulic transmission is used to realize the reciprocating motion of the worktable and the cross feed of the grinding wheel box.
Therefore, from the aspects of improving processing quality, processing efficiency, saving energy and so on, the application of frequency conversion speed regulation technology to grinder can achieve satisfactory results. There are many kinds of products processed in the mechanical processing industry. The size of the workpiece is different, and the processing accuracy is required to be different. The speed of grinding wheel is different from that of the main axis, so it is difficult to adjust the spindle speed to meet the linear speed of workpiece processing.
Because of the bending of the shaft during machining, the grinding wheel will produce different feed torque. This will bring different changes in the wheel speed and torque, and produce vibration knife / burn pattern. The grinding accuracy is awesome, resulting in low efficiency and low quality.
On 2018-08-08 11:45:46
