Medical Titanium bar rolling light parts and abrasive in the addition of emulsifier (or corrosion inhibitor) in dilute acid or dilute alkali, with the rotation of the roller and grinding each other, so as to achieve the purpose of bright appearance. It is suitable for handling small parts and parts that are difficult to be polished and polished. The right selection of rolling standards can improve productivity and quality.
1. The shape of the drum
The shape of the drum is round, hexagonal and octagonal, etc. This is because the barrel wall from the axis of the radius is different, and there must be a point of view, so the rolling parts are easy to change their orientation, bump against each other increase in time, grinding uniformity, high efficiency, so as to shorten the rolling time.
2. The size of the drum
The length varies according to the number of cells. The length of the drum is 600-800mm; The second pattern is 800-1500mm. Usually the larger is better. This is because the parts in the drum pressure and friction, so the amount of cutting is also increased. But about those who are afraid of compression and deformation of the parts, can use a small drum, and increase the length of the drum.
1) Drum data
There is a direct relationship between the drum speed and the cutting amount of parts in a certain range, that is, the faster the speed is, the greater the metal appearance of the cutting. However, when the speed exceeds a certain limit, it actually drops. Because the speed is too fast, the centrifugal force of the parts in the drum increases, so that the friction decreases. Usually, it is advisable to control it at 45r/min.
2) Abrasive and solution for smooth rolling
There are pumice, quartz, granite Angle, shell, iron and ceramic shards. The size of the abrasive particles should be larger or smaller than each hole of the piece. The number of drum internal loading is also an important factor affecting the quality of the parts on the surface, the volume of the drum usually accounted for 70% of the volume of the drum as appropriate. For heavy titanium parts or threaded parts, the loading capacity should be controlled at 80%-90%. The solution in the drum should be added to account for about 95% of the volume of the drum, note: in the drum to add acid solution, should first add enough water, and then add acid, to avoid parts corrosion in the process of rolling light, because of the increase in time, the concentration of the solution gradually decreased, or even lose the effect. Therefore, the change in concentration of the solution should be checked and replaced at regular intervals. Roll time should not be too long, or it will damage the parts. Use the brush to remove the burr, terbium, residual oil and corrosion sludge on the surface of the parts, and make the parts have a certain luster. Be sure to point out that elastic, rigid or thin-walled parts should be taken out in time after the end of rolling, otherwise it is easy to cause hydrocarding or local overcorrosion.
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