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Method for cutting force forecasting and stability judging in spiral hole milling process

A helical milling hole and cutting force technology, which is applied in the direction of milling machine equipment, milling machine equipment details, metal processing equipment, etc., can solve the problem that the accuracy is difficult to be guaranteed.

Active Publication Date: 2016-03-23
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Therefore, the accuracy of both stability determinations is difficult to be guaranteed.

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  • Method for cutting force forecasting and stability judging in spiral hole milling process
  • Method for cutting force forecasting and stability judging in spiral hole milling process
  • Method for cutting force forecasting and stability judging in spiral hole milling process

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[0103] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0104] This embodiment provides a cutting force prediction and stability determination method for helical milling holes, the flow chart of which is as follows figure 1 shown. First, according to the size of the hole to be processed, the tool and processing parameters are selected to generate the helical milling tool path; based on the assumption of the circular arc of the cutter tooth trajectory, and according to the geometric position relationship of the adjacent cutter position, the cutting-in a...

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Abstract

The invention provides a method for cutting force forecasting and stability judging in the spiral hole milling process. The method comprises the following steps that a tool and machining parameters are selected according to the size of a hole to be machined, and a spiral milling tool path is generated; assumption is carried out based on a tool tooth track arc, and the analytic calculation expression of the tool tooth cut-in and cut-out angle and non-deformation cutting thickness is obtained according to the tool geometric position relation between adjacent tool positions; side edge and bottom edge cutting force coefficients are obtained through triaxis single-tooth milling experiment calibration and triaxis inserting milling experiment calibration; the obtained parameters are substituted into a binary cutting force model to obtain side edge cutting force and bottom edge cutting force through calculation, and the side edge cutting force and the bottom edge cutting force are added to achieve precise forecasting of instant cutting force in the spiral hole milling process; and a three-freedom-degree milling kinetic equation comprehensively considering the milling tool structure mode coupling effect and the dynamic cutting thickness regeneration effect is built, and the stability of the machining process is judged based on a numerical integration method. The accuracy of cutting force forecasting and stability judging in the spiral hole milling process is improved.

Description

technical field [0001] The invention relates to a helical milling hole processing technology, in particular to a cutting force prediction and stability discrimination method in the helical milling process. Background technique [0002] In the field of aerospace, the number of holes made in the assembly of laminated components is large, difficult, demanding, and heavy. The traditional complex process of "drilling-expanding-reaming" has poor processing stability and low operating efficiency. Therefore, a new type of high-efficiency and high-precision hole-making technology—helical milling hole came into being. During the helical milling process, the tool rotates around the center axis of the hole while maintaining axial feed. This special movement determines the advantages of helical milling holes: [0003] 1. It breaks through the limitation of one tool to process the same diameter hole in the traditional drilling technology, and realizes the processing of holes with diffe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
CPCB23C3/00B23C2265/40
Inventor 李洲龙丁烨朱利民
Owner SHANGHAI JIAO TONG UNIV
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