How to sharpen the cutter blade
1. Level adjustment of the sharpener
Due to the cutting edge of the cutter blade A certain degree of straightness is required, so the horizontal position must be adjusted before grinding the paper cutting blade, and the difference should be corrected in time. At the same time, the position of the sharpener and the ground should be relatively fixed to prevent displacement after vibration and affect the sharpening accuracy.
2. Add coolant
The sharpening process of the knife sharpener is wet end face grinding, and the coolant is used to reduce the time of sharpening The temperature of the blade edge, to avoid the annealing caused by the high temperature of the blade edge. The ratio of coolant to water is 1:30. Every time you sharpen the paper cutter, you must pay attention to whether the coolant is sufficient and keep the coolant clean.
3. Fixing the position of the blade
The fixing of the cutter blade on the knife table is done by the magnetic suction cup of the knife table. Clean the planes and sides of the knife table from magnetic debris before installing the blade. When installing the blade on the knife table, the blade edge should be extended 10-15mm in front of the knife table, and the knife edge should be in contact with the magnetic calibrator to keep the straight line of the knife edge parallel to the guide rail. After confirming that the blade is placed correctly, turn on the electromagnetic switch and check whether there is suction.
4. Check the sharpening angle
Rotate the crank handle, according to the reading of the dial, rotate the knife table to the desired angle of the blade, if found Errors should be corrected in time.
5. Adjust the correct feed and sharpening speed
The sharpening machine can be divided into two types: rough grinding and fine grinding. In general grinding, the grinding head mechanism reciprocates and feeds the knife once each time, and the maximum feed amount at one time does not exceed 0.05mm. In fine grinding, the general grinding head mechanism only feeds once in a reciprocating trip, and the maximum feed amount at one time does not exceed 0.03mm. The feed rate can be set by computer, generally it is more appropriate to control it within the range of 0.01-0.005. The sharpening speed is divided into two gears: fast and slow. When sharpening, the fast gear can be used for rough grinding. When burrs are observed on the edge of the knife with the naked eye, the slow gear should be used for fine grinding.
6. Select grinding wheel abrasives
The sharpening of paper cutter blades is usually done with cup or bowl grinding wheels, but different materials should be Different grinding wheel abrasives are used to adapt, such as grinding hard alloy steel, gold steel grinding wheel should be used.
7. Knife sharpening
After the above work is done, the switch can be activated to automatically sharpen the knife. After the knife is sharpened, in order to make the cutting edge sharper, use a bamboo blade to scrape off the granular burrs left on the cutting edge along the cutting edge, and apply oil on the cutting edge to prolong the service life of the cutting edge.
What to pay attention to when grinding the cutter blade
1. Pay attention to check the grinding quality
During grinding When cutting the blade, the higher the grinding finish, the smaller the cutting resistance, the longer the service life of the cutter blade, and the better the cutting quality.
2. Pay attention to the grinding angle
The single-sided paper cutter blade is a single-edged blade, and the angle of the blade grinding edge is ∠19°~23°. The grinding edge of this shape makes the beveled surface of the blade bear the pressure of the corners of the paper during cutting, and the blade of the blade is quickly worn out. The double-sided blade has good wear resistance, and the grinding edge can reduce the load of the paper cutter and improve the accuracy of paper cutting. In the case that the blade of the paper cutter is of good quality, considering the shear resistance of the cutting paper, the angle of the grinding edge should be less than ∠19°~23°.
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