Employees of Tula State University have patented a device for manufacturing shells with longitudinal corrugations. The development relates to metal forming and can be used in aircraft construction, rocket technology, mechanical engineering, and other industries where lightweight and rigid thin-walled structures are needed.
The device works as follows: the workpiece is placed in a cage on an ejector. Then, a punch with a working surface that repeats the shape of the future product, with axial movement, locally distributes the workpiece in the radial direction. A gap is provided between the working surfaces of the punch and the cage, which forms the longitudinal corrugations. The finished shell is ejected from the cage.
The main advantage is the ability to produce shells with corrugations, the cross-section of which can have different shapes, in one working stroke along the entire length of the part. This simplifies production and increases the accuracy of finished products.