An Efficient Drilling Modeling Method Based on Chip Separation Crack Propagation Strategy

A technology of crack propagation and chip separation, which is applied in the field of high-efficiency drilling modeling based on chip separation and crack propagation strategy, which can solve the problem of not reflecting changes in chip shape, and achieve the effect of avoiding volume self-locking.

Active Publication Date: 2022-03-29
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide an efficient drilling modeling method based on chip separation crack growth strategy to solve the problem in the prior art that it cannot reflect the change in the actual chip shape after the material and cutting parameters are changed

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  • An Efficient Drilling Modeling Method Based on Chip Separation Crack Propagation Strategy
  • An Efficient Drilling Modeling Method Based on Chip Separation Crack Propagation Strategy
  • An Efficient Drilling Modeling Method Based on Chip Separation Crack Propagation Strategy

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Embodiment Construction

[0073] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings.

[0074] An efficient modeling method for drilling based on chip separation crack growth strategy, see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 , including the following steps:

[0075] Step 1. Establish the geometric model of the drill tip part of the drill bit. The drill bit is defined as a rigid body part regardless of wear, and the drill bit is defined as a rigid body part.

[0076] Step 2. Establish a geometric model of the cylindrical workpiece. In the drilling model, the part of the workpiece adjacent to the tool tip is considered, and the geometric model of the workpiece is constructed according to the shape of the drill tip, and the sweep with the main cutting edge is prefabricated on the cylindrical workpiece. A cone-like surface with consis...

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Abstract

The invention discloses a high-efficiency drilling modeling method based on chip separation crack propagation strategy, comprising the following steps: step 1, establishing a geometric model of the drill tip part of the drill bit, step 2, establishing a cylindrical workpiece geometric model, and step 3, establishing The periphery of the cylindrical workpiece uses infinite elements to deal with the stress in the boundary region. The nonlinear large deformation problem in the cutting process is fully considered, and the volume self-locking problem that is prone to occur in 3D simulation is considered. The consistency between the spiral descending movement path of the main cutting edge of the drill bit and the chip separation path during drilling is considered. The difference in grid division guides the crack propagation path when chips are formed, and the simulation error caused by it effectively avoids the volume self-locking in the large deformation and the failure of key chips to form in the drilling simulation, and solves the problem of not reflecting the material and The problem of the change in the actual chip shape after the cutting parameters are changed.

Description

technical field [0001] The invention belongs to the technical field of cutting processing simulation, and in particular relates to a high-efficiency drilling modeling method based on a chip separation crack expansion strategy. Background technique [0002] Cutting simulation technology plays an irreplaceable role in the study of cutting mechanism, optimization of cutting process, and improvement of tool structure design. It is an important means to promote the development of advanced processing theory and technology. Drilling simulation is currently recognized internationally as the most advanced cutting simulation technology. The most challenging and currently successful models are all successfully developed on the special software DEFORM and ADVANTEDGE. [0003] In the process of cutting, the generation of cracks is caused by the continuous accumulation of damage inside the workpiece. From plastic deformation to crack generation and finally crack propagation is a continuou...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/02G06F119/14
CPCG06F30/23G06F30/17G06F2119/14G06F2119/02
Inventor 项俊锋易万军李晨刘道新张晓化林钰刘涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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