Grinding wheel forming step

After the grinding wheel is finished, it is not said that it can be sold to the market. There are many steps that are unknown from the molding to the completion of some inspection work.
First, drying, firing
1, drying
After the 7″ cut off disc for stainless steel is finished, it is placed on the grinding wheel frame and pushed into the drying kiln for drying. At present, it is heated by electric wire, and the temperature is kept at 90 degrees Celsius for 12 hours, and then naturally cooled. In the future, mass production can be carried out by using the heat energy removed by the firing wheel kiln. In general, the grinding wheel with a diameter of 150mm or less can be dried in the sun to achieve the purpose of drying and drying. The grinding wheel with a diameter of 200mm or more, especially the 500mm and 600mm large grinding wheel, is dried in the drying kiln, otherwise it will appear in the firing process. Cracks affect the quality of the grinding wheel.
2, firing
The kiln used for firing the grinding wheel is a batch-type self-control kiln. The temperature rise curve can be set at the controller, and then the temperature in the kiln rises or falls with the set heating curve. The whole process is automatically controlled, the temperature is uniform, and the temperature rises quickly. The quality of firing is high.
Second, processing
The surface of the grinding wheel, the inner bore and the outer circle can be machined on a conventional lathe. The special-shaped grinding wheel machine can realize the automatic working cycle of multiple processes such as car, grinding and drilling. It can accurately and efficiently complete the turning, grinding, grinding and grinding of the outer circle, section, inner diameter and hole of the grinding wheel. It is suitable for parallel, cup, Processing of bowls, plates, worms and various shaped wheels. Applicable to the professional design of grinding wheel production, the tool holder is stable, the positioning is accurate, and the machining precision is high. The spindle frequency conversion speed regulation, the speed is gradual, the machining grinding wheel has no surface scratches and reduces the scrap rate.
Automated program control, complete manual unfinished actions, simple operation method and saving manpower. The inner hole coating machine for processing the grinding wheel comprises a centering cylinder, a squeeze cylinder, a storage cylinder, a connecting tube, a core rod, a chuck and a plate with a middle hole, and the grinding wheel is supported on the pallet, and the squeeze cylinder is The paint in the storage cylinder is pushed to the core rod, and under the action of the centering cylinder, the core rod is reciprocally applied in the inner hole of the grinding wheel. Grinding wheels with different internal holes have different mandrel for hole coating. After use, the mandrel should be sealed and stored to prevent the material in the mandrel from hardening and block the coating hole. Generally, the mandrel is immersed in diesel oil. The hole-coated material can be directly filled with water to cover the material, and is not in contact with air.
Third, molding
The grinding wheel is mainly formed by molding the sleeve and then pressing it on a hydraulic press. Before molding, the abrasive should also be screened once, then weigh the weight of the abrasive needed to form the grinding wheel, pour into the molding part of the hydraulic machine, and then mix the material as evenly as possible, scrape it with a scraper, put it into the template, and press the mold on the template. Push into the hydraulic part of the hydraulic press, start the hydraulic press, and set a certain pressure. When the hydraulic press is pressurized to the set pressure, it will stop, then relieve the pressure and push out the forming grinding wheel. Measure whether the thickness of the grinding wheel is within the sequence error and then place it on the grinding wheel frame.
Fourth, product testing
The hardness of the grinding wheel is mainly detected by the sand blasting hardness machine. The machine sprays a certain volume of quartz sand onto the surface of the grinding wheel by means of compressed air with a certain pressure, and shoots the measured grinding wheel into a small pit. The depth is used to determine the hardness of the wheel to be tested. If the hardness is high, the pit is shallow, and if the hardness is low, the pit is deep, and the pit is printed with a specific value. For example, the 350*40*127 grinding wheel in the previous example, the grinding wheel with a diameter of 350mm, the hardness K, the particle size 46, can be known by looking at the table on the machine. The standard value of the hardness is 2.34-1.80, the tolerance value is 2.61-1.57, and the output is If the value is within this range, the hardness is acceptable, and if it is not, it is unqualified.

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