Diagnostic of CNC Lathe With Qc 20 Ballbar System

Jóźwik, Jerzy; Semotiuk, Leszek; Kuric, Ivan

doi:10.12913/22998624/60793

Cited by 31 publications

(17 citation statements)

References 6 publications

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“…Mathematical record of the of positioning error changes ∆X mean , ∆Z mean is shown in equations (5) and (6) respectively ∆X mean = 0.0024•X + 0.035 (5) ∆Z mean = 0.0049•Z + 0.0198 (6) Analysis of obtained results showed the impact of the direction of approach to the nominal pose on the value and plus or minus sign of error value. This relationship can be observed e.g.…”

Section: P0→p1→p0→p2→p0→p3→p0→p4→ →P0→p5→p0→p6→p0→p7→p0→p8mentioning

confidence: 99%

“…in machining or assembly. In such cases the knowledge of accuracy and repeatability parameters of a given robot is crucial [4,6,9].…”

Section: Introductionmentioning

confidence: 99%

“…The major problem in robot testing and diagnostics consists in the lack of proper testing and measurement equipment [7][8][9][13][14][15][16][17][18][19]. This is by no means a problem in CNC multi-axis machine tools, where a wide range of diagnostic systems suitable for different applications are easily accessible [5][6][7][8][9]. This is confirmed by studies described in a relatively small number of existing research papers devoted to robot testing [2,[7][8][9][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Industrial Robot Repeatability Testing With High Speed Camera Phantom V2511

Jóźwik¹,

Ostrowski²,

Jarosz³

et al. 2016

Adv. Sci. Technol. Res. J.

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Apart from accuracy, one of the parameters describing industrial robots is positioning accuracy. The parameter in question, which is the subject of this paper, is often the decisive factor determining whether to apply a given robot to perform certain tasks or not. Articulated robots are predominantly used in such processes as: spot welding, transport of materials and other welding applications, where high positioning repeatability is required. It is therefore essential to recognise the parameter in question and to control it throughout the operation of the robot. This paper presents methodology for robot positioning accuracy measurements based on vision technique. The measurements were conducted with Phantom v2511 high-speed camera and TEMA Motion software, for motion analysis. The object of the measurements was a 6-axis Yaskawa Motoman HP20F industrial robot. The results of measurements obtained in tests provided data for the calculation of positioning accuracy of the robot, which was then juxtaposed against robot specifications. Also analysed was the impact of the direction of displacement on the value of attained pose errors. Test results are given in a graphic form.

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Section: P0→p1→p0→p2→p0→p3→p0→p4→ →P0→p5→p0→p6→p0→p7→p0→p8mentioning

confidence: 99%

“…in machining or assembly. In such cases the knowledge of accuracy and repeatability parameters of a given robot is crucial [4,6,9].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Industrial Robot Repeatability Testing With High Speed Camera Phantom V2511

Jóźwik¹,

Ostrowski²,

Jarosz³

et al. 2016

Adv. Sci. Technol. Res. J.

Self Cite

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show abstract

“…Noise minimisation is exceptionally important in machinery industry, where constant operation of machinery and devices entails exposition to high levels of noise. Examples of this include production halls with CNC machines [4][5][8][9][10][11][12][13]. Evaluation of that kind of noise constitutes the basis for using different methods of noise reduction and personal hearing protection when operating CNC machines [18][19].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the Noise Emitted by Machine Tools in Industrial Conditions

et al. 2018

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The paper presents an analysis of noise emitted by selected machine tools in a production hall (under industrial conditions). Noise monitoring is a fundamental task for maintaining workplaces which are safe and healthy. This paper presents the noise measurements obtained for several machine tools, performed in accordance with the PN ISO 230-5:2002 standard. The identification of noise sources and levels was conducted by means of the UNIT 352 measurement system for DMU 50, BGO-CNC/RV/R, FU 251, FW 801, FWC 25/H. Detection of noise sources in the tested machine tools allows to maintain safety of workers and effective means of noise reduction, which are highly significant from the perspective of minimising noise at various workstations. The method of performing noise measurements at workstations using specific machines is normalised, so that the results of such measurements for different machines could be compared. The test results were presented in the form of diagrams and tables. The results of the tests are concluded by a detailed recommendation for the CNC machine tool operators to use hearing protection when at work. The results showed that the level of noise at the operator's workstation significantly exceeds the standard at certain machining parameters.

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“…For any machining processes, the operating parameters play a vital role to get the accurate results. Also, a proper diagnosis is necessary to avoid unpredictable breakdown [18,23,24].…”

Section: Introductionmentioning

confidence: 99%

MICROSTRUCTURAL STUDY OF FAILURE PHENOMENA IN WC 94%-Co 6% HARD METAL ALLOY TIPS OF RADIAL PICKS

Nahak¹,

Chattopadhyaya²,

Dewangan

et al. 2017

Adv. Sci. Technol. Res. J.

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An excellent combination of hardness, strength, stiffness and high melting point has proved the WC-Co as an ideal material for tools that are used for metal cutting, coal mining, oil drilling, etc. The ongoing research in WC-Co is focussed on enhancing its wear resistant properties as much as possible. For the purpose, many attempts have been made to study the tribological behaviour of WC-Co for a long time. Researchers have used various grades of WC-Co in different working environments and accordingly they have characterized the wear phenomena involved there within. In this direction of research, the present paper makes an attempt to understand various wear behaviours in WC 94%-Co 6% hard metal alloy. WC-Co was used as a tip of the coal cutting tool named radial pick. Two radial picks have been taken for critical analysis through field emission scanning electron microscopy (FESEM) attached with energy dispersive Xray spectroscopy (EDS). In this work, the failure behaviours in the tools have been divided into five categories: (1) Abrasion on individual grain; (2) Corrosion in carbide grains; (3) Fragmentation and removal of WC grains; (4) Pores in WC grains; and (5) Coal and rock embedding. The most possible reasons behind each failure phenomenon have been explained comprehensively with the help of high-resolution microscopic images. However, it is usually observed that, initially, the tool gets minor cracks due to sudden impact. These cracks provide a path to the rock and coal particles to get entrenched inside the microstructure of cemented carbide. Finally, the intermixed external elements degrade the binder content (i.e. cobalt) and the tool becomes useless.

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Diagnostic of CNC Lathe With Qc 20 Ballbar System

Cited by 31 publications

References 6 publications

Industrial Robot Repeatability Testing With High Speed Camera Phantom V2511

Industrial Robot Repeatability Testing With High Speed Camera Phantom V2511

Monitoring of the Noise Emitted by Machine Tools in Industrial Conditions

MICROSTRUCTURAL STUDY OF FAILURE PHENOMENA IN WC 94%-Co 6% HARD METAL ALLOY TIPS OF RADIAL PICKS

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