TAILIEUCHUNG - Extrusion Subjects of interest

This chapter aims to provide useful information on different extrusions processes, which can be mainly divided into direct and indirect extrusion processes. This also includes basic background on hydrostatic extrusion, extrusions of tubing and production of seamless pipe and tubing. • Principal background and concept of extrusion will be addressed along with the utilisation of mathematical approaches to understand the calculation of extrusion load. | Chapter 4 Extrusion Subjects of interest Introduction objectives Classification of extrusion processes Extrusion equipment Presses dies and tools Hot extrusion Deformation lubrication and defects in extrusion Analysis of the extrusion process Cold extrusion and cold-forming Hydrostatic extrusion Extrusion of tubing Production of seamless pipe and tubing Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 Objective This chapter aims to provide useful information on different extrusions processes which can be mainly divided into direct and indirect extrusion processes. This also includes basic background on hydrostatic extrusion extrusions of tubing and production of seamless pipe and tubing. Principal background and concept of extrusion will be addressed along with the utilisation of mathematical approaches to understand the calculation of extrusion load. The role of lubricants on the deformation process which results in the improvement in extrusion products will be provided. Finally defects and its solutions occurring in the extrusion process will be emphasised. Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 What is extrusion Extrusion is the process by which a block billet of metal is reduced in cross section by forcing it to flow through a die orifice under high pressure. In general extrusion is used to produce cylindrical bars or hollow tubes or for the starting stock for drawn rod cold extrusion or forged products. Most metals are hot extruded due to large amount of forces required in extrusion. Complex shape can be extruded from the more readily extrudable metals such as aluminium. The products obtained are also called extrusion Suranaree University of Technology Tapany Udomphol Jan-Mar .

• Cơ khí - Chế tạo máy
• lubrication
• extrusion
• deformation
• hydrostatic
• seamless pipe
• tubing
• Machine design
• mechanical
• automatic feeders
• elevator
• tractors
• Rolling Bearings
• Lubrication System
• Lubricant Selection
• Lubricant Supply
• Imperfect Lubrication
• Lubricating Equipment
• Friction
• Wear
• Hydrodynamic Lubrication
• Journal Bearings
• Foil Bearings
• Temperature Rise
• Fundamentals of fluid film lubrication
• Fluid film lubrication
• Bearing classification
• Surface topography
• Lubricant properties
• Bearing materials
• Yiscous flow
• Reynolds equation
• Hydrodynamic journal bearings
• Analytical solutions
• Numerical solutions
• Hydrostatic pressure distribution of oil lubrication film
• Internal gear motors and pumps
• Solution of resistance network
• Internal gear pump
• Oil lubrication film
• Resistance network model
• Carbohydrate polymers
• Polysaccharide film lubrication
• Molecular properties
• Ionic strength
• Lubrication ability
• Stable operating area
• Minimum speed limit
• Internal gear motor and pump
• Lubrication oil film
• Minimum oil lubrication
• Lubricants
• Lubrication systems
• Component failures
• Machine maintenance
• Component repair
• Chemical effects
• Mechanical Engineering
• control friction
• product designers
• FRICTION kỹ thuật ma sát
• External cylindrical grinding machine
• Spindle bearing stiffness
• Hydrostatic lubrication
• Reasonable hydrostatic parameters
• Cylindrical grinding machines
• Minimum quantity lubrication
• Temperature cutting
• Tool wear
• Surface roughness
• Grey relational analysis
• Turning AISI 1045 material
• BMC Musculoskeletal Disorders
• Proteoglycan 4
• Synovial fluid
• Cartilage boundary lubrication
• Functional synergism
• Hệ thống bôi trơn
• ma sát máy
• kỹ thuật bôi trơn
• chế hóa khí
• vận hành hệ thống
• Thiết kế cơ khí
• ma sát
• ăn mòn kim loại
• nhiên liệu dầu
• Cơ khí chế tạo máy
• Điện – điện tử
• Tự động hóa
• Kiến trúc xây dựng
• Kỹ thuật viễn thông
• hướng dẫn cơ khí
• tài liệu cơ khí
• ôn thi cơ khí
• sổ tay cơ khí