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 the chip separation crack growth strategy, can solve the problem of not reflecting changes in chip shape, and achieve the effect of avoiding volume self-locking

Active Publication Date: 2020-09-11
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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  • Efficient drilling modeling method based on chip separation crack propagation strategy
  • Efficient drilling modeling method based on chip separation crack propagation strategy
  • 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 drilling modeling method based on chip separation crack growth strategy, please refer to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 with Image 6 , Including the following steps:

[0075] Step 1: Establish a geometric model of the drill tip part. 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. The part of the workpiece adjacent to the tip of the tool is considered in the drilling model, and the geometric model of the workpiece is constructed according to the shape of the drill tip. Cone-like surface with consistent sweep trajectory.

[0077] Aiming at the stage when the drill bit is drilled to form an edge defect, th...

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Abstract

The invention discloses an efficient drilling modeling method based on a chip separation crack propagation strategy. The efficient drilling modeling method comprises the following steps that 1, a geometric model of a drill bit drill tip part is established; 2, a geometric model of a cylindrical workpiece is established; and 3, infinite elements are adopted for processing the stress effect of a boundary domain on the periphery of the cylindrical workpiece. The nonlinear large deformation problem in the cutting machining process is fully considered, the problem of volume self-locking easily occurring in three-dimensional simulation is solved, and consistency of a spiral descending motion path and a chip separation path of a main cutting edge of the drill bit in drilling is considered. Different mesh division plays a role in guiding a crack propagation path when chips are formed and simulation errors caused by the crack propagation path, so that volume self-locking in large deformation and incapability of forming key chips in drilling simulation are effectively avoided, and the problem that the change of the actual chip form after the change of materials and cutting parameters cannotbe reflected is solved.

Description

Technical field [0001] The invention belongs to the technical field of cutting processing simulation, and specifically relates to an efficient drilling modeling method based on a chip separation crack propagation strategy. Background technique [0002] Cutting simulation technology plays an irreplaceable role in studying cutting mechanism, optimizing cutting processing technology, and improving tool structure design. It is an important means to promote the development of advanced processing theory and technology. Drilling simulation is currently recognized internationally in cutting simulation technology. The most challenging and current successful models are all developed on the dedicated software DEFORM and ADVANTEDGE. [0003] In the cutting process, the occurrence of cracks is caused by the continuous accumulation of damage inside the workpiece. From plastic deformation to crack formation, and finally crack propagation, it is a continuous physical process. In the corresponding ...

Claims

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Application Information

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Patent Type & Authority Applications(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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