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Oct 19, 2023

 

1. Speciel opmærksomhed bør betale til den installation af den på den slibemaskine. Fordi den slibende hjul fungerer under tilstanden af højhastigheds rotation, it bør være omhyggeligt kontrolleret før brug, og revner er ikke tilladt. installationen skal være solid og bør justeres for statisk balance til undgå personlig og kvalitet ulykker.

The inner hole of the grinding wheel and the outer circle of the sand wheel shaft or flange should not be too tight, otherwise the heat expansion during grinding will easily crack the grinding wheel, and it should not be too loose, otherwise the grinding wheel is prone to eccentricity and loss of balance, resulting in vibration. Generally, the clearance is {{0}}.1~0.8mm, and the clearance of high-speed grinding wheel is smaller. When installing the grinding wheel with flanges, the diameter of the two flanges should be equal, and the outer diameter should not be less than 1/3 of the outer diameter of the grinding wheel. Thick cardboard or oil-resistant rubber should be used as padding between the flange and the end face of the grinding wheel, so that the pressure is evenly distributed, and the tightening force of the nut should not be too large, otherwise the grinding wheel will break. Note that the direction of the tightening thread should be opposite to the direction of the grinding wheel, that is, when the grinding wheel is rotated counterclockwise, the right screw thread is used, so that the grinding wheel will drive the nut tighter and tighter under the action of grinding force.

2. Det balance af slibehjulet generelt det slibende hjul med en diameter større end 125mm skulle være afbalanceret så det det centrum af tyngdekraften af slibende hjulet overlapper med dets roterende akse.

Unbalanced grinding wheel will produce vibration at high speed rotation, color noise processing quality and machine tool accuracy, and will cause machine damage and grinding wheel fragmentation in serious cases. The main causes of unbalance are uneven density of each part of the grinding wheel, asymmetrical geometry and eccentric installation. Therefore, before installing the grinding wheel, it is necessary to balance, and the balance of the grinding wheel has two kinds of static balance and dynamic balance. In one case, only static balancing is required, but in high-speed grinding (speed greater than 50m/s) and high structure grinding, action balancing must be carried out. The following picture shows the grinding wheel static balancing device. When balancing, the grinding wheel is installed on the balance mandrel, and then the grinding wheel installed with the spindle is placed flat on the balance rail of the balance frame, and the grinding wheel will swing back and forth until the swing stops. The balanced grinding wheel can be stationary at any position. If the grinding wheel is not balanced, the heavier part of it always turns underneath. At this time, the position of the balance block can be moved to achieve balance. The balanced grinding wheel should be inspected for cracks before being installed on the spindle of the machine tool. The cracked grinding wheel is absolutely forbidden to be used. When installing the grinding wheel and flange should be padded with 0. 5-1 volumes of elastic cushion plate: the diameter of the two flanges must be equal, and its size is generally half of the diameter of the grinding wheel. There should be a certain gap between the grinding wheel and the sand wheel shaft or the step flange, so as not to crack the grinding wheel due to thermal expansion of the main shaft.

                                   

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1- Slibning hjul 2- dorn 3- flange 4- balance blok 5- balance spor 6- balance ramme

 

Metode af balancering den slibning hjul: belastning flere balancering blokke i ringen rille af den slibning hjul flange, og fabrikat centrum af tyngdekraften af den slibende hjul sammenfald med dens roterende akse ved justering den position af den balancerings blok.

3. Dressing of the grinding wheel In the grinding process, the abrasive grain of the grinding wheel is gradually rounded and blunt under the action of friction and extrusion, or when grinding ductile materials, the grinding chips are often impacted in the pores on the surface of the grinding wheel, so that the surface of the grinding wheel is blocked, and finally the grinding wheel loses the cutting ability. At this time, there will be a slip phenomenon between the grinding wheel and the workpiece, and may cause vibration and noise, so that the grinding efficiency is reduced, and the surface roughness is worse. At the same time, due to the increase of grinding force and grinding heat, it will cause the workpiece deformation and affect the grinding accuracy, and in serious cases, it will cause burns and small cracks on the grinding surface. In addition, due to the uneven hardness of the grinding wheel and the different working conditions of the grinding particle, the working surface of the grinding wheel is worn unevenly, and the amount of the grinding particle falls off varies from part to part, resulting in the loss of the contour accuracy of the grinding wheel, affecting the shape accuracy and roughness of the workpiece surface. Where the above situation is encountered, the grinding wheel must be trimmed, cut a layer of abrasive on the surface, so that the surface of the grinding wheel is exposed again, so as to restore the cutting ability and contour accuracy of the grinding wheel.

Diamant slibning hjul er almindeligt brugt til dressing, diamant har høj hårdhed og slidstyrke, er hovedværktøjet til dressing slibning hjul.

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