Study on Temperature Field Uniformity of Dynamic Induction Heating for Camshaft of Marine Diesel Engine

Abstract

This paper focuses on the study of the induction heating process of a camshaft in a marine diesel engine. A three-dimensional finite element model for dynamic induction heating is established using the finite element method of multi-physical field coupling, aiming to investigate the temperature uniformity of the cam during this process. Three elements are analyzed in this study: the moving speed, the gap between the induction coil and the workpiece, and the width of the induction coil. These factors allow for an analysis of the temperature distribution in the thickness direction and contour line direction of the cam under various conditions. On this basis, an equivalent parameter about the temperature uniformity in the thickness direction of the cam is proposed to guide the selection of the camshaft induction heating process parameters.

An Integrated C4-Spline Interpolation and Time-Free Global Optimization Methodology Applied to High-Speed Cam Motion Design

“…However, differing from previous studies, the contribution of the fourth-order motion parameter (Q) is incorporated for the first time into the integral objective function F for better control of global dynamics characteristics. To balance the contribution of each integral term in Equation ( 18), the weighting factors are herein scaled by the squared motion peaks (see Table 2) of the reference curve (MS curve), i.e., wV = 1/V max 2 , wA = 1/A max 2 , wJ = 1/J max 2 , and wQ = 1/Q max 2 . It is important to note that as with Equation ( 16), the integral objective function F in Equation The differential equation of motion of this SDOF model can be described as the following [24]:…”

“…The cam mechanism, as a contact-driven motion unit, plays an integral role in many modern automation machines, such as CNC machining centers [1] and internal combustion engines [2]. The distinct feature of the cam mechanism lies in its ability to tailor the cam profile using predefined transfer functions (termed as motion curves) [3], thus allowing the active control of the follower's motion to meet case-specific transmission requirements [4], as illustrated in Figure 1a.…”