Ultra-thin-walled tube roll forming method and device

Abstract

The invention discloses a method and a device for rolling forming ultra-thin wall tubes. The device comprises a spindle, a limiting bracket, and a power device, and further comprises a roll wave device and a shaping device. The roll wave device comprises a plurality of roll wave brackets and variable diameter mandrels. Roll wave dies are arranged on the roll wave brackets. The shaping device comprises a plurality of shaping brackets, and roll flat dies are arranged on the shaping brackets. The spindle, the roll wave brackets and the shaping brackets are connected with the power device. According the method and the device, in the preforming stage of tube blanks, a stepping rolling method is adopted for machining, so that the problem of difficulties of a traditional rolling forming mode is solved, and the problem of excessive thinning of traditional rolling tube blanks caused by that materials cannot flow into wave troughs when multiple waves are rolled synchronously is solved; and in the shaping stage of the tube blanks, the stepping rolling method is adopted for machining, so that the flow resistance of the materials in the deformation process is reduced, and the situation that thematerials are evenly distributed around tube walls after shaping is ensured.

Description

technical field [0001] The invention relates to the technical field of rolling forming of thin-walled tubes, in particular to a method and device for rolling forming of ultra-thin-walled tubes. Background technique [0002] Traditionally, the forming of ultra-thin-walled pipe fittings is generally processed by rolling or internal high pressure forming, but there are the following problems: [0003] 1. For ultra-thin-walled pipe fittings made of low-plasticity materials, because the material itself is not easily deformed at room temperature, processing by rolling will cause rounded wrinkling of thin-walled pipe fittings. If there is no support inside the wall pipe fittings, instability will also occur, and even cracks will occur due to local excessive thinning of the pipe fittings during rolling; [0004] 2. When using internal high pressure machining, although the problem that the material itself is not easy to deform is solved, the thin-walled pipe fittings will cause exce...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for roll forming of ultra-thin-walled pipes, through which the forming limit of ultra-thin-walled pipes can be improved, the cracking drive can be controlled, and the problem of the current ultra-thin-walled pipes being difficult to form and problems on the pipe wall can be solved. Problems such as uneven material distribution, further improving the forming device needed for this method

Images