Azuma Wataru, a third-year student at Karasumori High School, is a devil who strikes fear in the hearts of people. One day, Azuma is told by his form teacher that he has to participate in a club activity in order to make up for the lack of second-year students. The short-tempered Azuma cannot last long in whatever he does. At that moment, he learns that Satonaka Mari, the beautiful transfer student in his class, has joined the female rhythmic sports gymnastics club. He joins the male rhythmic sports gymnastics club, a club activity with very few people under the captain, Takenaka Yuta. They are ridiculed by the coach of the female rhythmic sports gymnastics club, and others, and are also hardly allowed to use the gym. However, when a sixth boy joins the club, Yuta decides to take part in a team competition with his long-sought six members…
Runtime: 58 minutes
Tumbling - Tumble finishing - Netflix
Tumble finishing, also known as tumbling or rumbling, is a technique for smoothing and polishing a rough surface on relatively small parts. In the field of metalworking, a similar process called barreling, or barrel finishing, works upon the same principles. This process is very similar to the natural processes that produce “sea glass” or “beach glass”.
Tumbling - Metal - Netflix
Metal tumbling is used to burnish, deburr, clean, radius, de-flash, descale, remove rust, polish, brighten, surface harden, prepare parts for further finishing, and break off die cast runners. The process is fairly simple: a horizontal barrel is filled with the parts which is then rotated. Variations of this process usually include media, water, or other lubricants. As the barrel is rotated the material rises until gravity causes the uppermost layer to landslide down to the other side. The barrel may also have vanes, typically made of rubber, which run along the inside of the barrel. As the barrel turns the vanes catch and lift the parts, which eventually slide down or fall. In a wet processes a compound, lubricant, or barreling soap is added to aid the finishing process, prevent rusting, and to clean parts. A wide variety of media is available to achieve the desired finished product. Common media materials include: sand, granite chips, slag, steel, ceramics, and synthetics. Moreover, these materials are available in a wide variety of shapes. Usually different shapes are used in the same load to reach into every geometry of the part. Tumbling is an economical finishing process because large batches of parts can be run with little or no supervision by the operator. A full cycle can take anywhere from 6 to 24 hours with the barrel turning at 20 to 38 RPM. Tumbling is usually most efficient with the barrel half full. Some processes also use a filter system to allow parts or other materials in the cylinder to be separated. The disadvantages of this process are that the abrasive action cannot be limited to only certain areas of the part, cycle times are long, and the process is noisy.