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1
Content available remote Use of the JM-SPC software to statistical control of high pressure die casting production-attribute valued data type
Mutwil J., Jurewicz A., Kremens Ł., Gruszczyński P.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 3
87-94
EN
A new version of the JM-SPC computer program written by J. Mutwil in Delphi for statistical control of production processes is presented. All changes have been by users suggestions caused. For the attribute valued data type most of new features have been joined to data introducing option. In this way the program allows to consider a wider data spectrum. Usefulness of the introduced solutions for statistical analysis of the attribute valued data type gained from real processes has been presented on the example of Al-Si high-pressure die casting production. The analysis refers to a serial produced casting and includes: 1) the analysis of defect fraction in sample (by using the p-chart), 2) the analysis of relative differences in importance of each defects categories (by using of the Pareto diagram).
2
Content available remote Use of the JM- SPC software to statistical control of high pressure die casting production-variable valued data type
Mutwil J., Lehmann A., Kremens Ł., Gruszczyński P.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 3
95-102
EN
Usefulness of the JM-SPC computer program for a statistical analysis of variable valued data proceeded from an Al-Si high-pressure die casting production processes was examined. An analysis subject were results of dimensional measurement of 16 casting dimensions systematically controlled on coordinate-measuring machine. For analysis two criterion have been used: 1) X-s control chart and the performance indicator of processes by using of two commonly used indices: potential process capability index (Cp) and process capability index (Cpk).
3
Content available remote Statistical control of machined high pressure die casting geometry by using of JM-SPC software
Mutwil J.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 4
141-148
EN
Usefulness of newest version of the JM-SPC computer program for a statistical analysis of production processes was examined. An analysis subject were results of measurements of 16 geometrical features of an Al-Si high-pressure die casting systematically controlled after machining on a coordinate-measuring machine. For analysis two criterion have been used: 1) Xave control chart and 2) a performance indicator of processes expressed by two commonly used indices: potential process capability index (Cp) and process capability index (Cpk).
4
Content available remote Investigations of linear contraction and shrinkage stresses development in hypereutectic al-si binary alloys
Mutwil J., Kujawa K., Bajon G., Hajn P.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 4
157-164
EN
Shrinkage phenomena during solidification and cooling of hypereutectic aluminium-silicon alloys (AlSi18, AlSi21) have been examined. A vertical shrinkage rod casting with circular cross-section (constant or fixed: tapered) has been used as a test sample. Two type of experiments have been conducted: 1) on development of the test sample linear dimension changes (linear expansion/contraction), 2) on development of shrinkage stresses in the test sample. By the linear contraction experiments the linear dimension changes of the test sample and the metal test mould as well a temperature in six points of the test sample have been registered. By shrinkage stresses examination a shrinkage tension force and linear dimension changes of the test sample as well a temperature in three points of the test sample have been registered. Registered time dependences of the test bar and the test mould linear dimension changes have shown, that so-called pre-shrinkage extension has been mainly by mould thermal extension caused. The investigation results have shown that both: the linear contraction as well as the shrinkage stresses development are evident dependent on metal temperature in a warmest region the sample (thermal centre).
5
Content available remote Design changes of device to investigation of alloys linear contraction and shrinkage stresses
Mutwil J.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 4
149-156
EN
Some design changes in device elaborated by author to examination of linear contraction and shrinkage stresses progress of metals and alloys during- and after solidification have been described. The introduced changes have been focused on design of closing of shrinkage test rod mould. The introduced changes have been allowed to simplify a mounting procedure of thermocouples measuring a temperature of the shrinkage rod casting (in 6 points). Exemplary investigation results of linear contraction and shrinkage stresses development in Al-Si13.5% alloy have been presented.
6
Content available remote Application of laser optical displacement sensor to foundry processes control and research
Mutwil J., Janowski R.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 3
103-108
EN
An experimental set-up elaborated for distance measurement with a use of a laser optical displacement sensor has been described. The features of the elaborated device allow to measure a surface roughness and dimensions of small details. Elaborated computer software allows automatically to estimate the classical surface roughness indices. The surface roughness indices can be estimated also for sloping planes. A solidification surface profile in macro and micro scale can also be measured. The mentioned solidification surface profile is measured on solidified shells obtained by using of so-called remove remainder test. Exemplary measurements of mould and casting surface roughness have been presented.
7
Content available remote New version of experimental setup for investigation of linear contraction and shrinkage stresses of metals and alloys
Mutwil J.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 4
133-140
EN
A new version of an experimental set-up for examination of linear contraction and shrinkage stresses progress of metals and alloys during– and after solidification has been described. By new method the examinations of the shrinkage phenomena are conducted in a vertical rod-casting with circular cross-section. The test rod casting can have a constant cross-section (constrained contraction, parted mould) or can be tapered (unconstrained contraction, no parted mould). The examinations can be conducted in sand and metal mould. A microprocessor recorder has been used for registering of measured signals. In the contraction experiment the dimensions changes of solidified test bar and the test mould are registered. By the investigation of contraction stresses, a contraction force effecting on the solidified test bar is registered instead of its dimension changes. The temperature changes of the shrinkage rod casting (in 6 points) and the mould (in one point) can be measured. Exemplary investigation results of linear contraction development in aluminium have been presented.
8
Content available remote Influence of silicon concentration on linear contraction process of Al-Si binary alloy
Mutwil J., Kujawa K., Marczewski P., Michajłow P.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 4
141-148
EN
Investigations of shrinkage phenomena during solidification and cooling of aluminium and aluminium-silicon alloys (AlSi5, AlSi7, AlSi9, AlSi11, AlSi12.5, AlSi18, AlSi21) have been conducted. A vertical shrinkage rod casting with circular cross-section (constant or fixed: tapered) has been used as a test sample. By constant cross-section a test channel mould was parted and allowed a constrained contraction to examine. No parted test channel mould was tapered and allowed an unconstrained contraction to investigate. In the experiments the dimensions changes of solidifying test bar and the test mould have been registered, what has allowed to explain a mechanism of pre-shrinkage extension of solidifying metals and alloys. Registered time dependence of the test bar and the test mould dimension changes have shown, that so-called pre-shrinkage extension has been by mould thermal extension caused. The investigation results have also shown that time- and temperature dependences of shrinkage of Al-Si alloys have been on silicon concentration depended.
9
Content available remote Application of laser optical displacement sensor for analysis of metal stream solidification surface profile in mould channel
Mutwil J., Janowski R.
Archives of Foundry Engineering
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2008
|
Vol. 8, iss. 3s
63--68
EN
An experimental set-up elaborated for measurement of solidification surface profile of metal stream flowing in a mould channel has been described. The mentioned solidification surface profile is measured on solidified shells obtained by using of so-called remove remainder test. As measurement result one obtains a line showing shells thickness distribution along their length. For shells thickness measurements a laser optical displacement sensor has been used. Using of the laser sensor allows also to observe the solidification profile line in micro- scale. Exemplary measurement results have been presented for Al-Si binary alloys.
10
Content available remote Application of JM-SPC program for statistical control of foundry production processes
Mutwil J.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 3
153-158
EN
A computer program written by author in Delphi for statistical control of production processes is presented. The JM-SPC program can be used for both the variable valued and the attribute valued data type. The data are introduced manually into table (up to 20 columns; up to 10000 rows). The option of data introducing is with some function equipped, which make this process very easy. The data analysis option offer many of analytical techniques. For variable valued data sets following control tools are available: individual values chart, average values chart, moving average values chart, exponentially moving average values chart, median values chart, range chart, standard deviation chart. Also two-signal control charts are available, for example: X-R, X-S, Me-R, Me-S. For variable valued data the performance of processes can be evaluated by using of two commonly used indices: potential process capability index (Cp) and process capability index (Cpk). For the attribute valued data type the user can select: p- and np-chart, c- and u-chart, Pareto diagram. Application of JM-SPC program for statistical analysis of real processes has been presented on the example of Al-Si high-pressure die casting production. For example of production of two different frame castings following analyses have been conducted: 1) the analysis of defect fraction in sample (by using the p-chart), 2) the analysis of relative differences in importance of each defects categories (by using of the Pareto diagram).
11
Content available remote An establish attempt of reasons of machining splinter formation in AC44200 alloy high pressure die castings
Mutwil J.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 3
159-166
EN
A problem of splinter formation during machining the AC44200 alloy high pressure die casting has been experimental investigated. In order to establish the reason of this occurrence a set of 200 high pressure die casting of the tensile strength samples have been prepared. The tensile tests were carried out using a Zwick Z050 universal testing machine. JM-SPC program has been used for statistical analysis of test results. A large variability of tensile strength results has been found. In order to find the reason of this variability the fracture surface investigations (macrographs for all of samples and SEM micrographs for chosen samples) have been carried out. It has been establish that in all cases a significant decrease of tensile strength was caused by presence of inclusions or porosity. In lot of cases the inclusions have a form of oxide film.
12
Content available remote An establish attempt of reasons of machining splinter formation in AC47000 alloy high pressure die castings
Mutwil J.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 3
167-172
EN
A problem of splinter formation during machining the AC47000 alloy high pressure die casting has been experimental investigated. In order to establish the reason of this occurrence a set of 200 high pressure die casting of the tensile strength samples have been prepared. The tensile tests were carried out using a Zwick Z050 universal testing machine. JM-SPC program has been used for statistical analysis of test results. A large variability of tensile strength results has been found. In order to find the reason of this variability the fracture surface investigations (macrographs for all of samples and SEM micrographs for chosen samples) have been carried out. It has been establish that in all cases a significant decrease of tensile strength was caused by presence of inclusions or porosity.
13
Content available remote Zapewnienie jakości na wydziale odlewni ciśnieniowej LUMEL S.A. - analiza wad siluminowego odlewu pokrywy
Mutwil J., Michalski M., Breitkopf-Jarowicz K., Tomasik K.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 21/1
247-254
PL
Na przykładzie konkretnego detalu przedstawiono problematykę zapewnienia jakości na wydziale odlewni ciśnieniowej LUMEL S.A.. Przedstawiono wyniki badań nad przyczynami powstawania wad w odlewie ciśnieniowym pokrywy wytwarzanej z siluminu okołoeutektycznego.
EN
On example of concrete detail the problematic of quality assurance in LUMEL S.A. die casting foundry has been presented. The examination results on causes of casting defects formation in cover die-casting manufactured from quasi-eutectic silumin have been presented.
14
Content available remote Zapewnienie jakości na wydziale odlewni ciśnieniowej LUMEL S.A. - analiza wad siluminowego odlewu obudowy zaworu
Mutwil J., Michalski M., Kędzierska A., Psikus Z.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 21/1
255-262
PL
Na przykładzie konkretnego detalu przedstawiono problematykę zapewnienia jakości na wydziale odlewni ciśnieniowej LUMEL S.A.. Przedstawiono wyniki badań nad przyczynami powstawania wad w odlewie ciśnieniowym obudowy zaworu wytwarzanej z siluminu okołoeutektycznego.
EN
On example of concrete detail the problematic of quality assurance in LUMEL S.A. die casting foundry has been presented. The examination results on causes of casting defects formation in valve housing die-casting manufactured from quasi-eutectic silumin have been presented.
15
Content available remote Skurcz liniowy i naprężenia skurczowe w okresie krzepnięcia i stygnięcia stopu AlSi21
Mutwil J.
Archiwum Odlewnictwa
|
2006
|
R. 6, nr 21/1
93-100
PL
Opisano stanowisko do badania skurczu liniowego i naprężeń skurczowych w odlewie. Przedstawiono badania przebiegu zmian wymiaru liniowego i naprężeń skurczowych w krzepnącym i stygnącym odlewie pręta ze stopu AlSi21. Badania prowadzono w piaskowych i metalowych formach testowych.
EN
An experimental set-up for examination of the progress of linear contraction- and shrinkage stresses in casting has been described. The examinations of linear contraction and shrinkage stresses progress in period of solidification and self-cooling of the rodcasting from hyper-eutectic AlSi21 alloy have been presented. The examinations have been in sand- and metal mould conducted.
16
Content available remote Rola badań elementarnych zjawisk i procesów odlewniczych w podnoszeniu jakości odlewów
Mutwil J.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 18/1
59--66
PL
Wskazano na istotną rolę badań podstawowych zjawisk i procesów odlewniczych w podnoszeniu jakości odlewów. Przedstawiono koncepcję badań procesu zalewania form. Opisano sposób badania ewolucji skurczu odlewniczego i naprężeń skurczowych.
EN
The important weight of examinations of fundamental castings phenomena and processes in improving of casings quality has been pointed. Investigation conception of mould pouring processes has been presented. The method of examination of casting contraction and contraction stresses evolution has been described.
17
Content available remote Doskonalenie odlewniczych systemów produkcyjnych poprzez rozwój badań
Mutwil J.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 19
195-200
PL
Omówiono znaczenie rozwoju badań w doskonaleniu odlewniczych systemów produkcyjnych. Opisano mikroprocesorowy system pomiarowy przystosowany do badania zjawisk i procesów odlewniczych. Opisano zastosowanie systemu do badania ewolucji skurczu odlewniczego i naprężeń skurczowych.
EN
The significance of research development in improving of casting production systems has been discussed. A microcomputer measuring system for investigation of the foundry phenomena and processes has been described. The application of measuring system for examination of casting contraction and contraction stresses evolution has been described.
18
Content available remote Badania skurczu liniowego w okresie krzepnięcia i stygnięcia stopu AlSi 5.4
Mutwil J.
Archiwum Odlewnictwa
|
2006
|
R. 6, nr 18/1
67--72
PL
Przedstawiono badania przebiegu skurczu liniowego w okresie krzepnięcia i stygnięcia dwuskładnikowego stopu AlSi5.4. Badania prowadzono w metalowych i piaskowych formach testowych.
EN
Investigations of the development of linear contraction which appear during the solidification and self-cooling of binary AlSi5.4 alloy have been presented. Experiments have been conducted in sand and metal test moulds.
19
Content available remote Badania skurczu liniowego w okresie krzepnięcia i stygnięcia stopu AlSi6.9
Mutwil J., Kłos S.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 19
201-206
PL
Przedstawiono badania przebiegu skurczu liniowego w okresie krzepnięcia i stygnięcia dwuskładnikowego stopu AlSi6.9. Badania prowadzono w metalowych i piaskowych formach testowych.
EN
Investigations of the development of linear contraction which appear during the solidification and self-cooling of binary AlSi6.9 alloy have been presented. Experiments have been conducted in sand and metal test moulds.
20
Content available remote Badania naprężeń skurczowych w okresie krzepnięcia i stygnięcia stopu AlSi6.9
Mutwil J., Patalas J.
Archiwum Odlewnictwa
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2006
|
R. 6, nr 19
207-212
PL
Przedstawiono badania ewolucji naprężeń skurczowych w okresie krzepnięcia i stygnięcia dwuskładnikowego stopu AlSi6.9. Badania prowadzono w metalowych i piaskowych formach testowych.
EN
Investigations of development of the shrinkage stresses which appear during the solidification and self-cooling of binary AlSi6.9 alloy have been presented. Experiments have been conducted in sand and metal test moulds.
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