Four-edge milling cutter is a commonly used type of milling cutter, which has a large number of cutting edges and high cutting efficiency, but also needs regular grinding to maintain its cutting performance. Here are the grinding steps for a four-edge mill:
1. Cleaning: Clean the four-edge milling cutter first to remove cutting oil and metal shavings.
2. Fixed: The four-edge milling cutter is fixed on the sharpening machine, which can use a special fixture or a magnetic clamp.
3. Rough grinding: Use the grinding wheel to rough the four-edge milling cutter, and keep a certain Angle before and after the grinding blade, so as not to dull the blade after grinding. Grinding wheels of different sizes can be selected according to needs.
4. Medium grinding: The use of grinding wheel for the four-edge milling cutter is mainly to remove the sand marks and uneven grinding left after rough grinding, so as to make the blade smoother.
5. Fine grinding: Use grinding wheel or sand belt to fine grind the four-edge milling cutter to make its surface smoother and improve cutting quality and efficiency.
6. Check: After grinding is completed, it is necessary to check the four-edge milling cutter to ensure that the Angle and size of its blade meet the requirements. If there is a place that does not meet the requirements, it needs to be ground again.
7. Polishing: Finally, the four-edge milling cutter can be polished to improve its surface finish and wear resistance.
It should be noted that when grinding four-edge milling cutters, special sharpening machines and grinding wheels are needed to ensure the grinding effect and safety. At the same time, grinding needs to be adjusted according to the material of the four-edge mill, the Angle of the cutting edge and the number of cutting edges and other factors to achieve the best cutting effect.
1\/7 step reading
Special shape face milling cutter and gear milling cutter, generally made of high-speed steel, its tooth back is an Archimedes spiral line, grinding as long as the front Angle is not changed, grinding after the original tooth shape can be obtained.
2\/7
The first step is to make a fixture that can be installed with a milling cutter, and install it horizontally on the universal indexing head, and correct it with a dial indicator. The correction is carried out in three aspects: first, the parallel degree of the upper prime line of the fixture relative to the table surface
3\/7
Secondly, the parallelism of the side line of the clamp with respect to the longitudinal feed of the table; Then, the radial runout of the milling cutter.
4\/7
Correct and then tighten with the center. The second step is to calculate the equal fraction according to the number of teeth of the cutter. The third step is to adjust the front Angle of the milling cutter to zero
5\/7
The fourth step is to use dish-shaped white corundum grinding wheel with particle size of 60~80. The fifth step is to install the disc grinding wheel on the vertical (or horizontal) milling machine spindle with a self-made special fixture.
6\/7
The sixth step, the spindle speed is adjusted to 1500r\/min, the table is made up and down or transverse micro adjustment, through the table longitudinal movement, until the milling cutter grinding is completed.
n. 伦敦七七爆炸案
The sixth step, the spindle speed is adjusted to 1500r\/min, the table is made up and down or transverse micro adjustment, through the table longitudinal movement, until the milling cutter grinding is completed.