Application of the finite element method in the milling process stability diagnosis

Dunaj, Paweł; Marchelek, K.; Chodźko, M.

doi:10.15632/jtam-pl/104589

Cited by 12 publications

(8 citation statements)

References 36 publications

(30 reference statements)

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“…2020, 10, 4722 2 of 21 manufacturing processes require continuous quality control for manufactured crankshafts [12][13][14]. A complete assessment of the geometric condition of a product to reflect its actual state can only be ensured using suitable measurement methods and techniques, and they should enable metrological and instrument accuracy within the specified tolerances [15].…”

Section: Introductionmentioning

confidence: 99%

Method to Increase the Accuracy of Large Crankshaft Geometry Measurements Using Counterweights to Minimize Elastic Deformations

et al. 2020

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Large crankshafts are highly susceptible to flexural deformation that causes them to undergo elastic deformation as they revolve, resulting in incorrect geometric measurements. Additional structural elements (counterweights) are used to stabilize the forces at the supports that fix the shaft during measurements. This article describes the use of temporary counterweights during measurements and presents the specifications of the measurement system and method. The effect of the proposed solution on the elastic deflection of a shaft was simulated with FEA, which showed that the solution provides constant reaction forces and ensures nearly zero deflection at the supported main journals of a shaft during its rotation (during its geometry measurement). The article also presents an example of a design solution for a single counterweight.

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Section: Introductionmentioning

confidence: 99%

Method to Increase the Accuracy of Large Crankshaft Geometry Measurements Using Counterweights to Minimize Elastic Deformations

et al. 2020

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“…The guiding systems of the Y and Z axes were modeled in accordance with the method contained in [26]. The feed drive systems were modeled in accordance with [27] and [28].…”

Section: Formulation Of a Substructural Fem Modelmentioning

confidence: 99%

Design of an Ultra-Light Portable Machine Tool

et al. 2021

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Designing machine tools for in situ machining is a challenging task due to their unique structures and restrictive functional requirements. Such a machine tool should be characterized by low mass, adequate machining accuracy and high machining stability. The paper presents the design of an ultra-light, axisymmetric, portable machine tool for in situ flange face milling. Due to a high compliance of the designed machine tool and a need of maintaining its low mass, structural modification aimed at stability increase were highly limited. Therefore, it was decided to select the spindle ensuring machining stability. The selection of the spindle was supported by finite element analysis. Based on numerical analyzes results a prototype with a proper spindle was build. Then, the accuracy of the finite element model and the predicted stability were experimentally verified, showing a good agreement with the real counterpart. Finally, two general conclusions were formulated: (i) in the case of machine tools characterized by high compliance and limited possibility of modifying their design a good choice may be the selection of a spindle that allows to obtain parameters that ensure stable machining, and (ii) it is possible to build low-dimensional, reliable finite element model without using substructuring or reduction methods, and a well-thought-out discretization and replacement elements of complex load bearing systems instead.

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“…In order to determine the process stability conditions for assessing the risk of self-excited vibrations, it is necessary to know the dynamic properties (as frequency response functions—FRFs) of the machine tool—workpiece system [ 20 ]. In the developed system, the system consists of a lathe spindle with a three-jaw chuck and a mounted workpiece.…”

Section: Cnc Machining Assistance Systemmentioning

confidence: 99%

Remanufacturing System with Chatter Suppression for CNC Turning

Miądlicki

Jasiewicz

Gołaszewski

et al. 2020

Sensors

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The paper presents the concept of a support system for the manufacture of machine spare parts. The operation of the system is based on a reverse engineering module enabling feature recognition based on a 3D parts scan. Then, a CAD geometrical model is generated, on the basis of which a machining strategy using the CAM system is developed. In parallel, based on the geometric model, a finite element model is built, which facilitates defining technological parameters, allowing one to minimize the risk of vibrations during machining. These parameters constitute input information to the CAM module. The operation of the described system is presented on the example of machining parts of the shaft class. The result is a replacement part, the accuracy of which was compared by means of the iterative closest point algorithm obtaining the RMSE at the level of scanner accuracy.

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Application of the finite element method in the milling process stability diagnosis

Cited by 12 publications

References 36 publications

Method to Increase the Accuracy of Large Crankshaft Geometry Measurements Using Counterweights to Minimize Elastic Deformations

Method to Increase the Accuracy of Large Crankshaft Geometry Measurements Using Counterweights to Minimize Elastic Deformations

Design of an Ultra-Light Portable Machine Tool

Remanufacturing System with Chatter Suppression for CNC Turning

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