GMSA LTP EF 349-2002 Force versus Angle Curve Determination for fasteners.pdf
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1、 LABORATORY TEST PROCEDURE PRODUCT ENGINEERING NUMBER: LTP.EF.349 DATE: 10/02 PAGE: 1 of 11 APPROVED BY: Roberto Garcia REVISION: NAME : Force versus Angle Curve Determination for fasteners Determinao da curva Fora Tensora versus ngulo, em elementos de fixao 1. Description This procedure describes t
2、he test methodology necessary to determine the Curve Force x Angle. The scope is to record the tribologycs and mechanic characteristics of fasteners in the elastic region. 1. Descrio Este procedimento descreve sucintamente a metodologia necessria para a determinao da Curva “Fora Tensora x ngulo”, co
3、m o objetivo de se registrar as caractersticas tribolgicas e mecnicas de elementos de fixao, na regio elstica. 2. References To elaborate this procedure was used the Users Guide of the equipment DTT - Torque/ Tension System, from Metalac, a subsidiary company of SPS Technologies, and the following i
4、nternational standards: a) DIN946; Determination of coefficient of friction of bolt/nut assemblies under specified conditions b) VDI 2230; Systematische Berechnung hochbeanspruchter Schraubenverbindungen Zilindrische Einschraubenverbindungen. 2. Referncias Na elaborao deste procedimento utilizou-se
5、alm das especificaes internacionais abaixo assinaladas, o Manual do Usurio e de Referncia do equipamento DTT - Determinador Torque/ Tenso, fabricado pela Metalac: a) DIN946; Determination of coefficient of friction of bolt/nut assemblies under specified conditions b) VDI 2230; Systematische Berechnu
6、ng hochbeanspruchter Schraubenverbindungen Zilindrische Einschraubenverbindungen. 3. Definitions 3.1 Gradient: The inclination value of the adjustment line. 3. Definies 3.1 Gradiente: Valor da inclinao da reta de ajuste. 3.2 Snug Force: Force value in the beginning of the linear region of the Curve
7、Force x Angle. 3.2 Fora de Ligao: Valor da Fora no incio da regio linear da Curva Fora x ngulo. 3.3 Proportional Limit (Force). Maximum force value at the end of the linear region of the Curve Force x Angle. 3.3 Fora Limite: Valor da Fora mxima na regio linear da Curva Fora x ngulo. 3.4 Maximum Forc
8、e: 3.4 Fora Mxima: PAGE: 2 of 11 LTP.EF.349 Ultimate value of Force reached during the test. Valor da mxima Fora alcanada durante o ensaio. 3.5 Maximum Angle: Angle value related to the ultimate Force. 3.5 ngulo Mximo: Valor do ngulo relativo a Fora mxima. 3.6 Proportional Angle: Angle value related
9、 to the snug Force. Note: The above parameters are consolidated in a Table, as showed in the Figure 01. 3.6 ngulo Limite: Valor do ngulo relativo a Fora mnima. Nota: Os parmetros acima citados so consolidados em uma tabela, como mostrado na Figura 01. 4. Test Equipment Torque / Tension System, model
10、 300, with the following ranges of: a) Torque = 10 to 300 Nm; b) Force = 10 to 100 kN. Note: According to the ranges showed above, it is only possible to determine the Curve Force x Angle for fasteners among M6 to M14 (and similar parts out of metric system). 4. Equipamento de Ensaio Determinador To
11、rque / Tenso, modelo 300, com as seguintes faixas de leituras: a) Torque = 10 a 300 Nm; b) Fora = 10 a 100 kN. Nota: De acordo com as faixas acima mostradas, s possvel determinar a Curva Fora Tensora x ngulo para elementos de fixao compreendidos entre M6 a M14 (e seus similares nas dimenses no mtric
12、as). 5. Development of the Test Method 5.1 Number of Test The number of tests to have a good analysis regarding the scatter is at least 7 (seven). In case of there are not enough samples available, the minimum number of samples shall be 3 (three). 5. Desenvolvimento do Mtodo de Ensaio 5.1 Nmero de E
13、nsaios O nmero de ensaios, para uma boa anlise quanto disperso, deve ser de no mnimo 7 (sete). Caso no haja amostras suficientes, o nmero mnimo de amostras dever ser de 3 (trs). 5.2 Procedure 5.2.1 Select the icon for the program and hit “Enter”. 5.2 Procedimento 5.2.1 Selecione o cone referente ao
14、programa e tecle “Enter”. 5.2.2 Type the user name and the password. 5.2.2 Digite o nome do usurio e a senha. 5.2.3 Click on option bottom from configuration bar, locate at the screen top. 5.2.3 Clicar no boto opes da barra de configuraes, localizado na parte superior horizontal. 5.2.4. The system s
15、etup: Follow the Users Guide of the equipment. The items below 5.2.4 Configuraes do sistema: Seguir as instrues do manual do usurio e REVISION : LTP.EF.349 PAGE: 3 of 11 are will take the pages that have to be look up, as well the mandatory set up referent of this LTP. The set up do not describe bel
16、ow shall be according to Users Guide of the equipment. referncia do DTT. Os itens abaixo iro mencionar as pginas a ser consultada, bem como configurao obrigatria ao teste referente a esta LTP. As configuraes no descritas abaixo devem estar de acordo com o manual. 5.2.4.1 In the folder “General” (pag
17、e 10) Type in the field “Enterprise” the phrase “General Motors do Brasil”. 5.2.4.1 Na pasta “Geral” (Pgina 10) Digite no campo “Empresa” a frase “General Motors do Brasil”. 5.2.4.2: In the folder “Tests” (pages 10 to 11). Type in the field “% CPGM” the value 98. 5.2.4.2 Na pasta “Ensaios” (Pginas 1
18、0 a 11). Digite no campo “% CPGM o valor “98”. 5.2.4.3: In the folder “Unit” (page 12) Choose in the field “Force Unit” the unit KN. Choose in the field “Torque” the unit Nm. 5.2.4.3 Na pasta “Unidade” (Pgina: 12) Escolha no campo “Fora” a unidade KN. Escolha no campo “Torque” a unidade Nm. 5.2.4.4:
19、 In the folder “Motor” (page 12) Select as “Rotation Squeeze” the value of 5 rpm. Select as “Rotation Unfasten” the value of 30 rpm. 5.2.4.4 Na pasta “Motor” (Pgina 12) Selecione como “Rotao de Aperto” o valor de 5 rpm. Selecione como “Rotao de Desaperto” o valor de 30 rpm. 5.2.4.5: In the folder “D
20、AQ” (pages 12 to 13). Click on “DAQ Test”. Note: This step verify if the “Spider” is turned on. Click on “Advanced” and then on “Tare” button. Note: This step unset the triple cell. 5.2.4.5 Na pasta “DAQ” (Pginas 12 a 13). Clicar em “Teste DAQ” Nota: Esta etapa verifica se o “Spider” esta conectado.
21、 Clique em “Avanado” e em seguida no boto “Tara”. Nota: Esta etapa zera a clula tripla. 5.2.5 Click on the “Pieces and Tests”. 5.2.5 Clique no boto “Peas e Ensaios”. 5.2.6 Select the piece in the field code (or click on New and type the data regarding the fields: code, customer and the geometries of
22、 the fastener and save this configuration). The geometric factors shall in agreement with the tested parts (nominal values). 5.2.6 Selecione a pea no campo cdigo (ou clique em Novo e digite os dados referentes aos campos: cdigo, cliente e as geometrias do fixador e salvar). Os fatores geomtricos dev
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