Término solicitado: LOPEZ DE LACALLE, L. N./(22)
4 Registro/s encontrado/s en CAT+NORMA
| Tipo de Docum.: | artículo |
| Título: | On the cutting performance of segmented diamond blades when dry-cutting concrete |
| Autor: | Sánchez Egea , A. J.; Martynenko, V.; Martínez Krahmer, D.; López de Lacalle, L. N.; Benítez, A.; Genovese, G. |
| Título Ser./Col.: | Materials, 11(2) |
| Autor Inst. Ser./Col.: | Multidisciplinary Digital Publishing Institute. MDPI. Basilea. Suiza |
| Idioma: | eng |
| Datos de Edición: | s.l. MDPI. 2018. |
| Pág./Vol.: | 12p. |
| Unidad técnica: | INTI-Mecánica; INTI-Construcciones. |
| Descriptores: | Corte; Diamante; Hormigones; Topografía; Desgaste; Ensayos de resistencia |
| Resumen: | The objective of the present study is to analyze and compare the cutting performance of segmented diamond blades when dry-cutting concrete. A cutting criteria is proposed to characterize the wear of the blades by measuring the variation of the external diameter and the weight loss of the blade. The results exhibit the cutting blade SB-A, which has twice the density of diamonds and large contact area, exhibits less wear even though the material removal rate is higher compared with the other two cutting blades. Additionally, the surface topography of the different blades is evaluated to examine the impact of wear depending on the surface profile and the distribution of the diamonds in the blade’s matrix. Large number of diamonds pull-out are found in blades type SB-C, which additionally shows the worst wear resistant capability. As a conclusion, the cutting efficiency of the blade is found to be related to the density of embedded diamonds and the type of the surface profile of the cutting blade after reaching the stop criteria. |
 Ver Documento
| |
Trabajo de INTI |
|
URL: |
http://www.mdpi.com/1996-1944/11/2/264 |
| Tipo de Docum.: | artículo |
| Título: | Short-cut method to assess a gross available energy in a medium-load screw friction press |
| Autor: | Sánchez Egea , A. J.; Deferrari, N.; Abate, Germán; Martínez Krahmer, D.; López de Lacalle, L. N. |
| Título Ser./Col.: | Metals, 8(3) |
| Autor Inst. Ser./Col.: | Multidisciplinary Digital Publishing Institute. MDPI. Basilea. Suiza |
| Idioma: | eng |
| Datos de Edición: | s.l. MDPI. 2018. |
| Pág./Vol.: | 12p. |
| Unidad técnica: | INTI-Mecánica. |
| Descriptores: | Energía; Fricción; Compresión; Prensas; Forja; Prensado; Cargas |
| Resumen: | The present study proposed a rapid method, based on a previous universal compression tests, to estimate the required load capacity to cold forge different specimen quantity in a screw press. Accordingly, experimental and theoretical approach are performed to check new adjustable drive motor of the modified forging machine to achieve a gross available energy to deform the specimens preventing damage of the forging machine. During the forging experiments, two screw friction presses (as-received and modified) are used to validate the theoretical approach. The modified press exhibits an increase of 51% of gross energy and 11% of maximum load capacity compare to the as-received press. This method is used to improve the effective of the forging process avoiding excessive loads that could promote machine failure. Therefore, a low-cost and easy to implement methodology is proposed to determine the energy and load capacity of a screw friction press to forge different specimen quantities with symmetry pattern configurations. |
| Ver Documento
| |
Trabajo de INTI |
|
URL: |
http://www.mdpi.com/2075-4701/8/3/173 |
| Tipo de Docum.: | artículo |
| Título: | Wear and MnS layer adhesion in uncoated cutting tools when dry and wet turning free-cutting steels |
| Autor: | Martinez Krahmer, D.; Hameed, S.; Sánchez Egea, A. J.; Pérez, D.; Canales, J.; López de Lacalle, L. N. |
| Título Ser./Col.: | Metals, 9(5) |
| Autor Inst. Ser./Col.: | Multidisciplinary Digital Publishing Institute. MDPI. Basilea. Suiza |
| Idioma: | eng |
| Datos de Edición: | s.l. MDPI. 2019. |
| Pág./Vol.: | 10p. |
| Descriptores: | Desgaste; Adhesión; Herramientas de corte; Aceros |
| Resumen: | Free-cutting steels are developed to produce large quantities of parts with low mechanical behavior, mainly for automotive sector. These alloys contain phosphorous, lead, sulfur, and manganese that help to improve the machinability and surface roughness. However, due to the toxicity of lead, steel mills in recent years have been focusing on non-toxic steels to produce minimum environmental pollution and better machinability. The present work investigates the tool wear during dry and wet turning of free-cutting steels (SAE 1212, SAE 12L14, and SAE 1215) by using uncoated hard metal inserts at three cutting speeds. Additionally, a EDS analysis was performed to determine the presence of Mn and S elements at the rake face of the cutting tool that can induce a higher adhesion of manganese sulfide (MnS). The results show that the SAE 12L14 steel has the best performance in terms of tool life at different cutting speeds. This difference is maximum at the lowest cutting speed, which gradually decreases with the increase of the cutting speed. The wear behavior is evaluated in the three steel alloys at each cutting speed and, consequently, the tool wear exhibits a slightly better performance in the dry machining condition for higher cutting speeds (180 and 240 m/min), independent of the steel alloy. Finally, EDS analysis confirms the presence of Mn and S elements at the rake face of the inserts machined in dry condition. Hence, MnS is expected to interpose between the machined surface and cutting tool surface to behave similar to tribofilm by reducing the wear on the cutting edge. |
| Ver Documento
| |
Trabajo de INTI |
|
URL: |
https://www.mdpi.com/2075-4701/9/5/556 |
| Tipo de Docum.: | libro |
| Título: | Machine tools for high performance machining |
| Autor: | López de Lacalle, L. N.. ed.; Lamikiz, A.. ed. |
| Idioma: | eng |
| Datos de Edición: | Bilbao. ES. Springer. 2009. |
| Pág./Vol.: | 442p. |
| Descriptores: | Máquinas herramientas; Mecanización; Herramientas; Herramientas de corte; Mecánica estructural; Industria mecánica; Componentes; Automóviles; Componentes constructivos; Industria mecánica; Mecánica; Motores; Sistemas mecánicos; Ingeniería mecánica; Ejes; Control numérico; Automotores; Vibraciones; Propiedades dinámicas; Propiedades mecánicas; Maquinado; Industria metalmecánica; Precisión; Performance; Dinámica; Motores eléctricos; Tornos; Trituradoras; Descargas eléctricas; Cinemática; Fresadoras; Aeronáutica; Industria aeroespacial; Industria automotriz |
| Ver más
| |
| Ubicación: | 621.9/L864; Mecánica/164 |
| Disponibilidad: | INTI-Mecánica |
Fin
[Página de Inicio] [Nueva Búsqueda][Página Anterior]