In a research project of the research institute of the head office of the company, the shells and cylinders of the product parts are thin-walled rotary shell parts (see Figures 1 and 2). The closing part of these two parts is very difficult if it is cut. It is not easy to guarantee the quality of the parts. The length of the cylinder is more than 1m, which makes it more difficult to process. Finally, it is decided to use thin-walled pipes for processing. Because it is the stage of scientific research and trial production, the production batch is small, and the product has not yet been finalized. If it is processed by using the pressure-receiving mold, it is not feasible, and there is no precedent for designing the larger size drop of the pressure. The cost is higher and the period is longer. The designers of the research institute and the craftsmen discussed and decided to carry out the test processing by rolling the roller on the horizontal lathe. Roller rolling processing is a processing method that achieves design requirements by rolling a roll on a part by rolling with a rolling tool with a roller to cause shrinkage deformation of the thin-walled material. The main difficulties of this part are: (1) The difference in the external dimensions of the two housing parts is large. (2) Since the length of the part is extended when the part is rolled and contracted, the length of the pre-cutting cannot be determined. (3) Because the rolling rebound of the material is not well understood, the positioning mandrel dimensions used in the rolling process are difficult to determine. (4) The test production time is very tight, only less than one month. After brainstorming and thoughtful research, the following processing steps were initially developed. The first step: preliminary design and processing of the rolling positioning mandrel according to the internal shape and size of the product drawing. Step 2: Cut the material according to the preliminary calculated length of the blank. The third step: the process test on the lathe, after several rollings, finally determine the positioning mandrel (see Figure 3, Figure 4) and the length of the part before processing (the housing is 124mm, the cylinder is 1 145 ~ 1 150mm). Rolling shell: spindle speed is 710r/min, feed rate is 0.3mm/r, rolling feed depth is 0.2~3mm, after 8~10 times of roll forming (feeding speed is reduced to 0.12~ near the finished product size) 0.15mm/r). The roller used is shown in Figure 5. Rolling cylinder: The spindle speed is 160 r/min. When the initial closing, the material is pulled out to locate the spindle 4~5mm to close the mouth, then 2mm is taken out to close the mouth. After 4~5 times, the bottom is flattened, and the diameter of the mouth is required. Less than about 2mm in the size shown in the figure; then use the mold (single) to screw in through the tailstock of the lathe, press the bottom into the shape shown in Figure 2, and finally drive the bottom hole to the size of the pattern. When the workpiece is clamped, the corresponding jacket is used to clamp the workpiece, so as to avoid the workpiece surface being scrapped and deformed, and the workpiece is scrapped. After less than a month, the scientific research and processing tasks of the two parts of the shell and the cylinder from the test to the production were successfully completed, and the design requirements were met. Although it is not ideal in use, it needs to be adjusted and improved. However, it has set a precedent in the process of rolling the thin-walled shell by roller rolling, and meets the needs of scientific research, ensuring the progress of scientific research and production. The expected design effect. sliding folding partition walls,office moveable walls,soundproof movable panels,divisions movable walls,soundproof portable partition walls Guangzhou MQ Acoustic Materials Co., Ltd , https://www.movablepartitionwall.com 1. Analysis of rolling process of thin-walled revolving body
Figure 1 housing 
Figure 2 cylinder 2. Rolling process method for thin-walled rotating body
Figure 3 Spinning shell mandrel 
Figure 4 Spinning cylinder mandrel 
Figure 5 wheel 3. Rolling process conclusion of thin-walled revolving body