Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms
Nine-link type double-toggle mold/die clamping mechanisms are widely used in modern injection molding machines and die casting machines in order to provide sufficient mold/die clamping force for counteracting the pressure occurred inside molds/dies. In this paper, the analysis and experimental evalu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/2/832 |
| _version_ | 1797410555875557376 |
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| author | Wen-Tung Chang Wei-I Lee Kuan-Lun Hsu |
| author_facet | Wen-Tung Chang Wei-I Lee Kuan-Lun Hsu |
| author_sort | Wen-Tung Chang |
| collection | DOAJ |
| description | Nine-link type double-toggle mold/die clamping mechanisms are widely used in modern injection molding machines and die casting machines in order to provide sufficient mold/die clamping force for counteracting the pressure occurred inside molds/dies. In this paper, the analysis and experimental evaluation of mechanical errors in nine-link type double-toggle mold/die clamping mechanisms are presented. The kinematic error equations of the output link (i.e., the moving platen) caused by dimensional errors (or tolerances) of link members are derived analytically through the concept of tolerance sensitivity analysis. Evaluation indices based on the asymmetry of the mold/die clamping mechanism caused by mechanical errors are established. A case study is then given to demonstrate the derived analytical equations and the established evaluation indices. Subsequently, a prototype for performing the experimental evaluation is conceptually designed and was actually constructed. Experiments were conducted for evaluating the quantitative influence of mechanical errors on the operating performance of the constructed mold/die clamping mechanism. According to the experimental results, response surface modelling for benefiting the constructed mold/die clamping mechanism with better operating performance could be performed. The presented research results will be helpful in the tolerance analysis and mechanical error detection of nine-link type double-toggle mold/die clamping mechanisms. |
| first_indexed | 2024-03-09T04:31:44Z |
| format | Article |
| id | doaj.art-5751b76693a246fd9fde874e30b1f329 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T04:31:44Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5751b76693a246fd9fde874e30b1f3292023-12-03T13:34:42ZengMDPI AGApplied Sciences2076-34172021-01-0111283210.3390/app11020832Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping MechanismsWen-Tung Chang0Wei-I Lee1Kuan-Lun Hsu2Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Mechanical Engineering, National Taiwan University, Taipei 10617, TaiwanNine-link type double-toggle mold/die clamping mechanisms are widely used in modern injection molding machines and die casting machines in order to provide sufficient mold/die clamping force for counteracting the pressure occurred inside molds/dies. In this paper, the analysis and experimental evaluation of mechanical errors in nine-link type double-toggle mold/die clamping mechanisms are presented. The kinematic error equations of the output link (i.e., the moving platen) caused by dimensional errors (or tolerances) of link members are derived analytically through the concept of tolerance sensitivity analysis. Evaluation indices based on the asymmetry of the mold/die clamping mechanism caused by mechanical errors are established. A case study is then given to demonstrate the derived analytical equations and the established evaluation indices. Subsequently, a prototype for performing the experimental evaluation is conceptually designed and was actually constructed. Experiments were conducted for evaluating the quantitative influence of mechanical errors on the operating performance of the constructed mold/die clamping mechanism. According to the experimental results, response surface modelling for benefiting the constructed mold/die clamping mechanism with better operating performance could be performed. The presented research results will be helpful in the tolerance analysis and mechanical error detection of nine-link type double-toggle mold/die clamping mechanisms.https://www.mdpi.com/2076-3417/11/2/832mold/die clamping mechanismnine-link type double-toggle mechanismplanar linkageparadoxical overconstrained mechanismmechanical error analysistolerance sensitivity analysis |
| spellingShingle | Wen-Tung Chang Wei-I Lee Kuan-Lun Hsu Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms Applied Sciences mold/die clamping mechanism nine-link type double-toggle mechanism planar linkage paradoxical overconstrained mechanism mechanical error analysis tolerance sensitivity analysis |
| title | Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms |
| title_full | Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms |
| title_fullStr | Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms |
| title_full_unstemmed | Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms |
| title_short | Analysis and Experimental Verification of Mechanical Errors in Nine-Link Type Double-Toggle Mold/Die Clamping Mechanisms |
| title_sort | analysis and experimental verification of mechanical errors in nine link type double toggle mold die clamping mechanisms |
| topic | mold/die clamping mechanism nine-link type double-toggle mechanism planar linkage paradoxical overconstrained mechanism mechanical error analysis tolerance sensitivity analysis |
| url | https://www.mdpi.com/2076-3417/11/2/832 |
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