Researches Regarding Optimising the Contouring Precision of CNC Laser Cutting Machines

Biriș, Cristina; Breaz, Radu-Eugen; Gîrjob, Claudia; Chicea, Anca Lucia

doi:10.4028/www.scientific.net/amm.555.580

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…This compensates for the geometrical inaccuracies (squareness) of the axes of the machine tool by adjusting the position of adjacent axes based on the position of the measured axis. [9] In this case it can be seen that the contouring errors are reduced.…”

Section: Experimental Researchesmentioning

confidence: 80%

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Researches Regarding Optimizing the Accuracy of CNC Laser Cutting Machines

Biriș

Gîrjob

Bologa

2015

AMM

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The experimental researches presented in this paper are aimed to improve the manufacturing accuracy of a contouring machine together with an approach to eliminate the errors which lead to a less precise part after machining.In order to eliminate the errors, the machine's feed drives were tuned leading to a more precise part. In order to validate the proposed approach, the accuracy of the machine was tested before and after the tuning process.

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Section: Experimental Researchesmentioning

confidence: 80%

“…All the systems have a certain lag regarding the commanded position which is related to how well tuned are the servos. Therefore by tuning the system can be reached a smaller lag, a higher loop gain resulting in a better path accuracy and a more precise part [9].…”

Section: Introductionmentioning

confidence: 99%

Researches Regarding Optimizing the Accuracy of CNC Laser Cutting Machines

Biriș

Gîrjob

Bologa

2015

AMM

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“…The aim of this paper is to investigate the behaviour of the sheet metal blank deformed through single point incremental forming process, with focus on the sheet metal bending error. Also a mathematical model is proposed in order to evaluate the maximum deviation between the CAD profile of the part and the actual profile obtained through finite element analysis method in relation to the distance between the initial contact of the tool and retaining rings [13][14][15][16][17][18][19][20].…”

Section: Fig 2 Common Defects Of Parts Manufactured Through Spif [6]mentioning

confidence: 99%

Common defects of parts manufactured through single point incremental forming

et al. 2021

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Single point incremental forming is one of the most intensely researched die-less manufacturing process. This process implies the usage of a CNC equipment or a serial robot which deforms a sheet metal with the help of a relatively simple tool that follows an imposed toolpath. As every cold metal forming process, besides the many given advantages it has also some drawbacks. One big drawback in comparison with other cold metal forming processes is the low accuracy of the deformed parts. The aim of this research is to investigate the sheet metal bending mechanism through finite element method analysis. The results shows that the shape of the retaining rings has a big influence over the final geometrical accuracy of the parts manufactured through single point incremental forming.

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“…To achieve higher manufacturing efficiency, Sencer et al [12] proposed a crosscoupled controller to improve the differential positioning errors between dual servo drives by modifying the reference position and velocity commands; this approach improves motion synchronization without affecting the overall tracking bandwidth. Biris et al [13] proposed a mathematical model based on the transfer function to adjust the machine feed-drive system and conducted experiments to compare the effectiveness of various methods for eliminating positioning and contour errors. Chen et al [14] proposed an iterative learning control (ILC) algorithm to optimize the synchronization errors of rigid tapping; this algorithm provides better commands for z-axis and spindle motions, synchronizing their output responses as much as possible.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Multi-Object Optimization Method for Tapping Center Machines

Chang¹,

Chou²,

Yang³

et al. 2023

Intelligent Automation &Amp; Soft Computing

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This paper proposes a hybrid multi-object optimization method integrating a uniform design, an adaptive network-based fuzzy inference system (ANFIS), and a multi-objective particle swarm optimizer (MOPSO) to optimize the rigid tapping parameters and minimize the synchronization errors and cycle times of computer numerical control (CNC) machines. First, rigid tapping parameters and uniform (including 41-level and 19-level) layouts were adopted to collect representative data for modeling. Next, ANFIS was used to build the model for the collected 41-level and 19-level uniform layout experiment data. In tapping center machines, the synchronization errors and cycle times are important considerations, so these two objects were used to build the ANFIS models. Then, a MOPSO algorithm was used to search for the optimal parameter combinations for the two ANFIS models simultaneously. The experimental results showed that the proposed method obtains suitable parameter values and optimal parameter combinations compared with the non-systematic method. Additionally, the optimal parameter combination was used to optimize existing CNC tools during the commissioning process. Adjusting the proportional and integral gains of the spindle could improve resistance to deformation during rigid tapping. The position gain and pre-feedback coefficient can reduce the synchronization errors significantly, and the acceleration and deceleration times of the spindle affect both the machining time and synchronization errors. The proposed method can quickly and accurately minimize synchronization errors from 107 to 19.5 pulses as well as the processing time from 3,600 to 3,248 ms; it can also shorten the machining time significantly and reduce simultaneous errors to improve tapping yield, thereby helping factories achieve carbon reduction.

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Researches Regarding Optimising the Contouring Precision of CNC Laser Cutting Machines

Cited by 6 publications

References 5 publications

Researches Regarding Optimizing the Accuracy of CNC Laser Cutting Machines

Researches Regarding Optimizing the Accuracy of CNC Laser Cutting Machines

Common defects of parts manufactured through single point incremental forming

Hybrid Multi-Object Optimization Method for Tapping Center Machines

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