Large-angle incremental forming flat head rotating tool head

Abstract

The invention discloses a large-angle incremental forming flat head rotating tool head. The tool head comprises a tool rod and a rotating tool head body, wherein the upper end of the tool rod is connected with a numerical control incremental machine tool main shaft, the lower end of the tool rod is of an inverted cone frustum shape, a threaded hole is formed in the center of the bottom surface ofthe lower end of the tool rod, and the rotating tool head body comprises a rotating cutter head, a cutter head sleeve and a cutter core. Compared with the prior art, the rotating tool head converts the sliding friction between a traditional incremental forming tool head and a plate material during forming into the rolling friction, so that the forming angle is increased, the forming quality is greatly improved, and the application range of incremental forming is further expanded.

Description

Technical field [0001] The invention relates to the field of mechanical engineering, in particular to a large-angle progressive forming flat-head rotating tool head. Background technique [0002] Progressive forming is a flexible processing method for forming three-dimensional curved surface of sheet metal, which can realize digital manufacturing. Generally, the tool head used in progressive forming is an integral tool head, the end of which is spherical, and the tool head and the sheet material are in a state of sliding friction during forming, so the surface of the tool head is easy to wear, and the sheet metal forming accuracy is reduced. The forming force is increased, and the surface of the formed part is prone to scratches. The tool head needs to be replaced as a whole after it is worn out. Because the tool head is made of high-hardness materials such as tool steel or alloy steel, and the processing accuracy of the end spherical surface is high, the processing is difficult...

AI Technical Summary

Problems solved by technology

Generally, the tool head used in incremental forming is an integral tool head, and its end is in a spherical shape. When forming, the tool head and the sheet are in a state of sliding friction, so the surface of the tool head is easy to wear, and the forming accuracy of the sheet is reduced. The forming force needs to be increased, and at the same time, the surface of the formed part is prone to scratch defects

After the tool head is worn out, it needs to be replaced as a whole. Since the tool head is made of high hardness materials such as tool steel or alloy steel, and the processing accuracy of the spherical surface at the end is high, the processing is difficult, so the replacement is particularly difficult.

[0003] Li Mingzhe of Jilin University designed a rolling tool head for progressive forming (patent number: 201010030832), which uses rolling friction instead of sliding friction to improve surface quality. : CN201210028809.6), but these designs are all ball head tool heads, which are prone to bulging during forming, and are not suitable for the forming of sheet metal parts with high surface flatness requirements, and the forming angle is limited, which limits the progressive forming. Application range

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