Incremental forming variable-pressure machine tool fixture and blank holder force control method thereof

Abstract

The invention discloses an incremental forming variable-pressure machine tool fixture. The incremental forming variable-pressure machine tool fixture comprise a plurality of guide pillars (2), an upper pressing plate (5) and a supporting bottom plate (1) are arranged at the upper and lower ends of each guide pillar (2), and a lower pressing plate (3) is movably arranged between the supporting bottom plate (1) and the upper pressing plate (5). A cup-cover-shaped floating-roof block (6) is connected to the lower surface of the lower pressing plate (3), a first threaded hole is formed in the center of the cup-cover-shaped floating-roof block (6), a screw nut on a lead screw (7) is fixedly connected into the first threaded hole, the lead screw (7) penetrates through the screw nut, and a transmission system is connected with the bottom end of the lead screw (7). The invention further discloses a blank holder force control method of the incremental forming variable-pressure machine tool fixture. According to the incremental forming variable-pressure machine tool fixture and the blank holder force control method thereof, the up-and-down fluctuation of the lower pressing plate and the automation of clamping of a plate by the fixture are achieved, at the same time, feeding during machining is facilitated, the plate is prevented from breaking during machining, and the forming limit of the plate can be improved obviously.

Description

technical field [0001] The invention relates to a progressive forming deformation pressure machine tool fixture and a blank-holding force control method thereof, belonging to the technical field of sheet metal progressive forming processing. Background technique [0002] In the 1990s, Japanese scholar Matsubara Shigeo proposed a new process for forming sheet metal, that is, incremental forming technology. It is based on the idea of ​​"layered manufacturing" in rapid prototyping technology. It decomposes the complex three-dimensional shape into multiple two-dimensional layers according to the contour line. Layer plastic processing, and finally form the part. This technology belongs to the flexible manufacturing technology. The partial rolling and deformation of the sheet metal is carried out, and the deformation is continuously accumulated to achieve the overall forming. The forming performance is good and the forming limit is high. It is especially suitable for small-batch ...

AI Technical Summary

Problems solved by technology

At present, the blank holder force in the incremental forming process is usually fixed, which leads to the inability to realize feeding in the incremental forming process, which limits the popularization and use of incremental forming technology to a certain extent

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