- 期刊
旋轉拉伸彎管夾持模具之設計與彎管成形分析
Clamping Die Design and Tube Bending Analysis in Rotatory Drawing Bending Processes
摘要
本研究以彎管製程中，彎曲模具及夾持模具對管材夾持的模擬為主，探討不同管材參數及夾持模具齒型對夾持施力及橢圓率的影響，模擬分為純夾持及彎管兩者。透過有限元素分析軟體DEFORM模擬夾持狀態，藉此降低反覆試模、修模上所耗費的時間、財力與人力。最後結果顯示，相同的推進距離下，管材厚度對夾持施力有較大影響，橢圓率部分則受厚度變化影響小，受直徑變化影響較大。夾持力曲線圖具分隔點，作為彈性與塑性區的交界。相同推距，且管材尺寸固定的情況下，有齒型設計之夾持模具，夾持施力及橢圓率小於無齒型設計。彎管部分，90度之彎管橢圓率較彎管前多出2％，若設定彎管後橢圓率需低於3％，則純夾持橢圓率需小於1％。有齒型設計之夾持模具能有效降低管材與夾持模具間的滑移，比無齒型的夾持模具設計約可減少5mm的滑移量。
關鍵字
無資料並列摘要
In this study, the bending die and clamping die used in tube bending are simulated. The influences of different pipe parameters and the tooth shape of clamping die on clamping force and ellipticity are discussed. The clamping state is simulated through the finite element analysis software DEFORM, thereby reducing the time, money and manpower spent on repeated mold trials and die repairs. The final result shows that under the same advancing distance, the thickness of the pipe has a greater influence on the clamping force, while the ellipticity is less affected by the thickness change but more affected by the diameter change. In the clamping force graph, a separation point as the boundary between the elastic and plastic zones can be observed. For clamping die with toothed design, the clamping force and ellipticity are less than those of toothless design. For tube bending part, the ellipticity of the 90-degree bending is 2% more than before bending. The clamping die with toothed design can effectively reduce the pipe slipping by about 5mm compares to the toothless design.