Medical titanium rod Rolling is the purpose of grinding parts and abrasives in dilute acid or alkali with emulsifier (or corrosion inhibitor) together with the rotation of roller to obtain a bright appearance. It is suitable for the disposal of small parts and parts difficult to polish and polish. The correct selection of rolling standards can improve productivity and quality.

1. Shape of drum

The shape of the roller includes circle, hexagon and octagon, among which polygon has good practicability. This is because the radius of the barrel wall from the axis is not equal, and there are certain points of view, so the rolling parts are easy to change the orientation, the opportunity to collide with each other is increased, the grinding is uniform, and the efficiency is high, which can shorten the rolling time.

2. Roller dimensions

The straight calibration is 50mm-100mm, and the length varies with the number of cells. The length of the first pattern roller is 600-800mm; The second pattern is 800-1500mm. Usually the larger one is better. This is because the pressure and friction force on the parts in the drum are large, so the cutting amount is also increased. But for those parts that are afraid of pressure and deformation, small drums can be used and the drum length can be increased.

1) Information for drum

There is a direct relationship between the rotating speed of the drum and the cutting amount of the parts in a certain range, that is, the faster the rotating speed is, the greater the cutting of the metal surface will be. However, when the speed exceeds a certain upper limit, it will decrease. Because when the rotating speed is too fast, the centrifugal force of the parts in the drum increases and the friction force decreases. It is usually better to control it at 45r/min.

2) Abrasives and solutions for rolling

The abrasives used for barrel polishing include pumice, quartz, granite skin angle, shell, iron filings and ceramic fragments. The size of abrasive particles shall be larger or smaller than each hole of the workpiece. The amount of contents in the drum is also an important factor affecting the quality of agricultural surface of parts. The amount of people in the drum usually accounts for 70% of the drum volume. For heavy titanium parts or threaded parts at www.lh-ti.com, it is advisable to control the installed quantity of 80% - 90%. The solution in the drum shall account for about 95% of the drum volume (Note: When adding acid solution to the drum, you should first add enough water and then add acid to avoid corrosion of parts during the rolling process. As the time increases, the concentration of the solution in the drum will gradually decrease, or even lose its effect. Therefore, you should check the concentration of the solution every other time and replace it. The rolling time should not be too long, or the parts will be damaged. That is, use a brush Remove burrs, terbium compounds, residual oil and corrosion sludge on the surface of the parts, and make the parts have a certain gloss. It must be pointed out that elastic, rigid or thin-walled parts should be taken out in time after the completion of rolling, otherwise hydrogen permeation or local over corrosion may occur.

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