Servo stamping speed control method based on jerking movement degree

Abstract

The invention discloses a servo stamping speed control method based on a jerking movement degree. The method comprises the following steps of S1, building a three-dimensional model of a component to be stamped and introducing the model into finite element analysis software; S2, setting a material parameter, a boundary condition and a contact condition, and dividing grids; S3, setting a displacement amplitude mathematical expression to be X=At3+Bt2+Ct+D, and determining an initial value range of A to be 0 to 1, the initial value range of B to be 0 to -3, the initial value range of C to be 1 to 3, and the initial value of D to be 0; S4, selecting different values within the initial value ranges of A, B and V to set different displacement amplitude curves, and submitting for computation; and S5, extracting data from computation results for comparative analysis, and determining the optimized value ranges of A, B and C. According to the method provided by the invention, the displacement, speed, acceleration jerking movement degree can be continuously adjustable, and shaping quality of the complex components and the components difficult to shape is enhanced.

Description

technical field [0001] The invention belongs to the technical field of stamping forming, and in particular relates to a jerk-based servo stamping speed control method for improving the forming quality of parts. Background technique [0002] Stamping speed is an important process parameter of sheet metal forming, which has a great influence on the forming quality and forming limit of parts. When the stamping speed is too high, the production efficiency is greatly improved, but the required forming force increases, the noise is serious, and the flow of the material is not sufficient, and the sheet is prone to cracking; when the stamping speed is too small, the noise is small and the flow of the material Relatively sufficient, the forming limit and forming accuracy are improved, but the production efficiency is greatly reduced. [0003] With the rapid development of servo motors, the stamping movement can realize precise adjustment of speed or displacement. The flexible and c...

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Problems solved by technology

In the finite element simulation and test, it is found that under the condition of variable speed, the forming limit and forming quality of the parts become better. For example, MORI et al. proposed in the article "Springback behavior inbending of ultra-high-strength steel sheets using CNC servopress" to control by secondary impact Springback defects in plate bending process, MATSUMOTO et al. proposed in the article "Prevention of galling in forming of deep hole with retreat and advance pulseram motion on servo press" that the slider's step-by-step stamping motion curve is used for deep drawing of parts, all of which are effective Eliminates the wrinkling defect of deep-drawing parts, but most of the speed-changing motion methods are controlled by spline curves, which do not have mathematical characteristics

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