矫直具有复杂机械特性的部分热处理滚珠丝杠的冲程模型

IF 1.9 4区 工程技术 Q2 Engineering
Ji-Hyeon Shin, Sang Won Kim, Hae-Sung Yoon
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引用次数: 0

摘要

滚珠丝杠经过表面热处理/硬化,以提高其疲劳强度。然而,螺钉在加热过程中不可避免地会发生变形。因此,必须进行额外的矫直处理。通常采用三点弯曲加压;然而,确定某些塑性变形的适当冲程具有挑战性,这主要是由于表面热处理滚珠丝杠具有复杂的机械特性。在这项研究中,我们测试了由不同几何形状和热处理深度的 S55C 组成的滚珠丝杠,目的是构建一个用于精确矫直的冲程模型。三点弯曲实验表明,滚珠丝杠弯曲后的塑性变形受热处理面积与总横截面积之比以及热处理面积绝对值的影响。根据给定的塑性变形和滚珠丝杠的几何形状构建响应曲面,以预测矫直所需的行程。根据实验结果,通过对两种材料的螺钉进行建模,建立了计算模型。通过调整未热处理区域和热处理区域的机械性能,计算模型显示出与实验结果相似的特性。预计我们的方法将有助于对具有复杂机械性能的部分热处理滚珠丝杠进行更精确、更有效的矫直。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A Stroke Model for Straightening Partially Heat-Treated Ball Screws with Complex Mechanical Properties

A Stroke Model for Straightening Partially Heat-Treated Ball Screws with Complex Mechanical Properties

Ball screws are surface heat-treated/hardened to improve their fatigue strength. However, the screws inevitably deform during heating. Thus, an additional straightening process is essential. Pressurization through three-point bending is typically adopted; however, determining the appropriate stroke for certain plastic deformations is challenging, mainly due to the complex mechanical properties of surface heat-treated ball screws. In this study, ball screws composed of S55C with various geometric shapes and heat-treated depths were tested with the aim of constructing a stroke model for precise straightening. Three-point bending experiments showed that the plastic deformation of the ball screws after bending was affected by the ratio of the heat-treated area to the total cross-sectional area, as well as the absolute value of the heat-treated area. Response surfaces were constructed according to the given plastic deformation and geometric shape of the ball screws to predict the desired stroke for straightening. Based on the experimental results, a computational model was built by modeling the screws with two materials. By adjusting the mechanical properties of non-heat-treated and heat-treated areas, the computational model showed similar characteristics to the experimental results. It is expected that our approach will contribute to more precise and effective straightening of partially heat-treated ball screws with complex mechanical properties.

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来源期刊
CiteScore
4.10
自引率
10.50%
发文量
115
审稿时长
3-6 weeks
期刊介绍: The International Journal of Precision Engineering and Manufacturing accepts original contributions on all aspects of precision engineering and manufacturing. The journal specific focus areas include, but are not limited to: - Precision Machining Processes - Manufacturing Systems - Robotics and Automation - Machine Tools - Design and Materials - Biomechanical Engineering - Nano/Micro Technology - Rapid Prototyping and Manufacturing - Measurements and Control Surveys and reviews will also be planned in consultation with the Editorial Board.
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