Transactions of Materials and Heat Treatment

Title：CNC incremental forming for open slot part based on half-constraint

Authors：

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ClassificationCode：TG335.5

year,vol(issue):pagenumber：2020,45(7):51-57

Abstract：

Aiming at the problem that the thickness of open slot parts with large forming angle was severely reduced and it was difficult to form during the incremental forming, a CNC incremental forming method for the open slot part based on the half-constraint fixing method was proposed. In the method, a partial-constraint method was adopted to fix only one side of sheet, so that the sheet material at non-fixed side moved to the forming region under the forming force, thereby the deformation region and the sheet material amount participating in the deformation were increased to reduce the thickness reduction of sheet. The CNC incremental forming process and forming trajectory planning strategy for half-constraint fixed open slot part were given. The comparative experiment of full-constraint CNC incremental forming and half-constraint CNC incremental forming was carried out with the open slot parts containing 90° forming angle as the experimental part. The experimental results show that under the two-pass forming strategy, the full-constraint fixing method cannot form the sheet, while the half-constraint fixing method can form snccessfully. The average thickness of successfully formed part is 0.65 mm, the minimum thickness is 0.505 mm, and the lateral deviation of contour is 0.62 mm, which indicates that the half-constraint forming can greatly reduce the thickness reduction of sheet and improve the sheet formability.

Funds：

辽宁省自然科学基金资助项目(2014024011)

朱虎(1964-)，男，博士，教授 E-mail：zhuhu10@163.com

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