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Processoepd.additionalLciaResults = Indicadores adicionais de impacto ambientalConjunto de dados: Machining of steel alloy DIN 20MnCr5, hobbing process, at plant, for industrial use, BR 2021 (br) pt

Informações sobre o conjunto de dados-chave
Localização BR
Descrição da representatividade geográfica All the input/output data were collected in the Brazilian South East Region, where more than 70% of automotive gears are produced in the country.
Ano de referência 2019
Nome
Machining of steel alloy DIN 20MnCr5, hobbing process, at plant, for industrial use, BR 2021
Comentário geral sobre o conjunto de dados This dataset represents a gear hobbing unit process for helical gears for automotive applications. The machined parts are made of steel alloy DIN 20MnCr5. It includes the inputs: semi-finished turned gear, coolant oil, compressed air, and electric energy; and the outputs: helical gear (main product), and metal chips impregnated with coolant oil. Emissions to air and heat generation were not included within the system boundary. Production of 36.000 gears per year based on a working scheme of 250 days with one shift of 8 hours and the process start-up/shutdown takes place just before/after the shift starts.
Direitos autorais Não
Referência quantitativa
Fluxo(s) de referência
Representatividade de tempo
Conjunto de dados válido até 2020
Descrição da representatividade de tempo The data was collected within the period 12/2019 - 10/2020
Representatividade tecnológica
Descrição da tecnologia, incluindo sistema de fundo Helical gears for the automotive industry are produced from steel alloy forged blanks, that are subsequentely turned to convert them into semi-finished gears. The gear hobbing process removes material from the semi-finished gear until all the gear teeth are formed. Afterwards the gears pass through heat treatment and teeth grinding processes to finish the manufacturing phase. The residues from the hobbing process are the nearly dry metal chips, which contain only traces of cutting integral oil used during hobbing.
Modelo matemático
Variável / parâmetro Fórmula Valor médio Valor mínimo Valor máximo Tipo de distribuição de incertezas StdDev relativo em % Comentário geral
Elect_Consum_ReadforProcessing 8.0E-5 % Corresponds to energy consumption during the Read for Processing process in in 1s
Elect_Consum_Processing 0.003925 % Corresponds to energy consumption during the machine processing process in in 1s
Time_Processing 1.0 % Corresponds to the total time to the machine stay in processing in seconds (s)
Time_WarmUp 1.0 % Corresponds to the total time to the machine stay in warmup in seconds (s)
Gear_Semifinished_total gear_SemiFinished *Time_Processing 0.075 % kg of gear steel come per cycle
Consum_Total_Electricity (elect_Consum_ExtStandby *Time_ExtStandby +Elect_Consum_Processing *Time_Processing +Elect_Consum_ReadforProcessing *Time_ReadforProcessing +Elect_Consum_Standby *Time_Standby +Elect_Consum_WarmUp *Time_WarmUp ) 0.00513 % electricity per cycle (kwh/s)
Gear_machined_total gear_machined *Time_Processing 0.06985 % kg of steel sustained per cycle
Integral_fluid_consum_total integral_fluid_consum *Time_Processing 3.59E-5 % l of integral fluid used per cycle
Elect_Consum_Standby 1.5E-4 % Corresponds to energy consumption during the process of standby the machine in in 1s
Time_ReadforProcessing 1.0 % Corresponds to the total time to the machine stay in read for processing in seconds (s)
Steel_chips_gear (gear_SemiFinished -Gear_machined )*Time_Processing 0.005150000000000002 % kg of steel removed per cycle
Integral_fluid_consum 3.59E-5 % Corresponds to the fluid consumption per second [liters for second]
Time_ExtStandby 1.0 % Corresponds to the total time to the machine stay in Extstandby in seconds (s)
Elect_Consum_ExtStandby 1.65E-4 % Corresponds to energy consumption during the process of Ext. standby the machine in 1s
Gear_SemiFinished 0.075 % Corresponds to the entrance of semi-finished geras for the machining process per second [Kg/s]
Elect_Consum_WarmUp 8.1E-4 % Corresponds to energy consumption during the WarmUp process in in 1s
Contamined_oil 1.4E-5 % Corresponds to the total contamined oil for second (kg for s)
Contamined_oil_total contamined_oil *Time_Processing 1.4E-5 % kg of contamined oil per cycle
Gear_machined 0.06985 % Represents the amount mass of the final product (machined parts per second) [Kg/s]
Time_Standby 1.0 % Corresponds to the total time to the machine stay in standby in seconds (s)
gd_price_waste 0.5 % This parameter was added by GreenDelta during the implementation of the ecoinvent database in openLCA. It is used by those exchanges which did not have a price specified by ecoinvent for being wastes (i.e. negative reference product), and that were considered that they should have a cost/revenue specified. The prices used for them, equal to the prices of the same product in other processes of the database, are modified by this parameter with value 0.5 (i.e. half the price of the normal product), considering that the reference product of a waste treatment process might have a lower price in reality than the same flow produced by a production process. However, you can modify this value to 0 if you prefer to consider no price for them like ecoinvent, or also 1 if you do not want to distinguish wastes from other products.
gd_price_product 1.0 % This parameter was added by GreenDelta during the implementation of the ecoinvent database in openLCA. It is used by those exchanges which did not have a price specified by ecoinvent and that were considered to be products or co-products of waste treatments (i.e. positive reference product), and that they should have a cost/revenue specified. The prices used for them, equal to the prices of the same product in other processes of the database, are modified by this parameter with value 1. However, you can modify this value to 0 if you prefer to consider no price for them like ecoinvent.
ei_price_product 1.0 % This parameter was added by GreenDelta during the implementation of the ecoinvent database in openLCA. It is used by those exchanges which did not have a price specified by ecoinvent in this specific system model, but yes in at least one of the other two system models. The prices used for them, equal to the prices of the same product and provider in the other system model, are modified by this parameter with value 1. However, you can modify this value to 0 if you prefer to consider no price for them in this system model like ecoinvent.
temp_olca_param23 gear_machined_total 0.06985 %
temp_olca_param24 gear_Semifinished_total 0.075 %
temp_olca_param25 contamined_oil_total 1.4E-5 %
temp_olca_param26 steel_chips_gear 0.005150000000000002 %
temp_olca_param27 consum_Total_Electricity 0.00513 %
temp_olca_param28 integral_fluid_consum_total 3.59E-5 %
Método LCI e alocação
Tipo de conjunto de dados Unit process, black box
Princípio do Método LCI Other
Desvio do princípio do método LCI / explicações Attributional method
Constantes de modelagem No allocation rules were used for this dataset, as well as any of the transportation activities for the inputs. This is a G2G product system type.
Fontes de dados, tratamento e representatividade
Princípios de corte e completude de dados Input flows with less than 1% mass representativeness were disregarded from the system boundaries. Emissions from treated air and heat represent low relevance due to their volume per functional unit (1 second of processing).
Desvio dos princípios/explicações de corte e completude de dados None.
Seleção de dados e princípios de combinação Primary data were collected for the machining production system. See 'Geography' and 'Technology' scopes for more details.
Desvio da seleção de dados e princípios/explicações de combinação None.
Princípios de tratamento de dados e extrapolações All the input/output data were converted to the functional unit of 1s of manufacturing operation by using the UPLCI methodology developed by Kellens et al. (2012a,b). All the collected input/output flows followed the "in-depth assessment" approach proposed by the UPLCI methodology.
Fonte(s) de dados utilizada(s) para este conjunto de dados
Procedimento de amostragem Resources and emissions at the production site, assumed the use of one machine-tool to describe a gear hobbing machine of steel alloy parts, equipped with MQL.
Período de coleta de dados See 'Time' scope for more details.
Integralidade
Completude do modelo do produto No statement
Comissário e objetivo
Projeto SOARES, Luiz Arthur Paluch. ACV Comparativa entre processo de fresamento de engrenagens automotivas. 2020. 107 f. Dissertação (Mestrado) - Curso de Engenharia de Produção, Universidade Federal de São Carlos, Sorocaba, 2021.
Aplicações pretendidas This process LCI can be used for any types of LCA studies.
Gerador de dados
Gerador / modelador de conjunto de dados
Entrada de dados por
Carimbo de tempo (último gravado) 2021-05-20T15:00:23.490-03:00
Formato(s) do(s) conjunto(s) de dados
Entrada de dados por
Publicação e propriedade
UUID d20cb0b7-4235-415e-b514-745dbe76883b
Data da última revisão 2021-05-20T14:59:01.259-03:00
Versão do conjunto de dados 00.00.119
Republicação sem alterações de
Direitos autorais Não
Restrições de acesso e uso The data set can be used free of charge by anybody to perform LCA studies, to distribute it to third parties, to convert it to other LCA formats, to develop own data sets, etc.

Entradas

Tipo de fluxo Classificação Fluxo Variável Valor médio Valor resultante Montante mínimo Montante máximo
Product flow
temp_olca_param24 1.0 kg0.075 kg
Comentário geral The raw material (workpiece) is a turned semi-finished gear to be machined in the hobbing process.
Product flow
Energy carriers and technologies / Electricity temp_olca_param27 1.0 MJ0.018468000000000002 MJ
Comentário geral Total electric energy consumed by the machine tool over the five production modes.
Product flow
temp_olca_param28 1.0 m33.59E-8 m3
Comentário geral The composition of this cutting fluid R134A is HFC(hydrofluorocarbons).

Saídas

Tipo de fluxo Classificação Fluxo Variável Valor médio Valor resultante Montante mínimo Montante máximo
Product flow
temp_olca_param23 1.0 kg0.06985 kg
Comentário geral The total amount of metal gear (output) after the machining process.
Waste flow
temp_olca_param25 1.0 kg1.4E-5 kg
Comentário geral Represents the contamined oil of the cutting fluid (R134A) after the machining process.
Waste flow
temp_olca_param26 1.0 kg0.005150000000000002 kg
Comentário geral Represents the amount of metal chips removed from the machining process.