相关实验视频
Updated: Sep 16, 2025

07:36
Experimental Procedure for Warm Spinning of Cast Aluminum Components
Published on: February 1, 2017
9.6K
在Ti-6Al-4V合金的直角旋转过程中,确定工具面的接触温度的方法
Łukasz Ślusarczyk1, Agnieszka Twardowska2
1Department of Production Engineering, Faculty of Mechanical Engineering, Cracow University of Technology, Al. Jana Pawła II 37, 31-864 Krakow, Poland.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究提出了一种新的方法,用于在加工过程中确定二次剪切区域的接触温度. 该研究提供了对热现象的洞察力,并为改进的切割过程提供了建模.
科学领域:
- 材料科学与工程 材料科学与工程
- 制造过程 制造过程 制造过程
- 部落学 (tribology) 是一个学科.
背景情况:
- 准确地确定二次切割区的接触温度对于理解和优化加工过程至关重要,特别是对于Ti-6Al-4V等先进材料.
- 现有的模型往往需要改进,以充分捕捉芯片工具界面发生的复杂热力学相互作用,包括粘合和滑动现象.
研究的目的:
- 提出并验证一种方法来确定Ti-6Al-4V的直角转过程中二次剪切区域的接触温度.
- 为了研究加工参数 (料速率,切割速度,角) 对芯片工具界面的热现象和摩擦的影响.
- 适应和应用双区域热力机械切割模型用于热流识别和温度分区分析.
主要方法:
- 使用WC-Co工具进行Ti-6Al-4V的试验直角旋转.
- 测量切割力 (零电动力表),切割区温度 (热视摄像头) 和芯片形成 (高速摄像头).
- 调整一个双区域热力学模型,并应用肖氏方法来确定温度分割系数.
主要成果:
- 机械加工参数,摩擦系数和芯片工具接触长度之间的确定的关系.
- 使用适应的双区域模型,在芯片面接触区量化热量流.
- 使用 MATLAB PDE 3.9 软件对工具面的温度分布进行可视化.
结论:
- 拟议的方法有效地确定了二次剪切区域的接触温度,为加工中的热分析提供了有价值的数据.
- 该研究提供了对热现象的更深入的理解,以及它们与加工过程参数和摩擦的关系.
- 这些发现有助于改进在切割操作期间在二次切割区域内对热方面的建模和分析.
相关概念视频
Angle of Twist: Problem Solving
397
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
397
Screw: Problem Solving
459
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
459
Angle of Twist - Elastic Range
413
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
413
Transmission Shafts: Problem Solving
294
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
294
Thin-Walled Hollow Shafts
247
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
247
Contact Angle
13.6K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
13.6K

