Clamping optimization method and system based on in-line engine block
An engine block and optimization method technology, applied in the field of mechanical processing, can solve problems such as dwelling and lack of in-depth exploration of workpiece deformation laws, and achieve the effects of strong robustness, important engineering practical value, and high computational efficiency
Active Publication Date: 2019-01-15
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
This method provides a new clamping scheme for cylinder processing, that is, the original six-step clamping is simplified to three steps, and the workpiece is directly sent to the processing table. However, this method still ignores the impact of the clamping and positioning itself on the workpiece. The improvement of the clamping scheme stays at the level of the mechanical structure, lacking in-depth exploration of the deformation law of the workpiece, so the effect of the improvement has certain limitations
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[0064] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0065] Such as Figure 1 to Figure 7 As shown, in this embodiment, the clamping optimization method based on the in-line engine block provided by the present invention includes the following steps:
[0066] Step 1: Establish the static milling force model of the plane milling process of the engine block, such as figure 2 As shown, by decomposing the cutting force on the microelement body of the milling cutter tooth edge and superimposing all the microelement cutting forces involved in cutting at...
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The invention provides a clamping optimization method and a system based on an in-line engine cylinder block, comprising the following steps: a static milling force model of an engine cylinder block in a plane milling process is established to obtain a minimum clamping force required for maintaining clamping stability; according to the stiffness characteristics of engine block geometry, the engineblock model is simplified and divided into three characteristic regions. Based on the theory of elasticity, the elastic deformation caused by the clamping force acting on different positions in threecharacteristic regions is analyzed one by one, and the total elastic deformation caused by the clamping and positioning action is obtained. The optimization model of clamping scheme is established and solved by genetic algorithm, and the optimal clamping scheme is obtained which is suitable for the top surface milling process of engine block. The invention optimizes the clamping scheme in the milling process of the top surface of the engine cylinder block, effectively reduces the elastic deformation of the cylinder block caused by the locating clamping force, and thus improves the flatness accuracy of the final machined surface.
Description
technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a clamping optimization method and system based on an in-line engine cylinder block. Background technique [0002] The engine block is one of the main parts of the engine, and its quality and machining accuracy directly affect the performance of the automobile engine. In the milling process of the top surface of the engine block, due to the influence of the clamping force during the clamping and positioning process, the engine block will have a certain degree of irregular elastic deformation due to its own uneven stiffness. Excessive clamping elastic deformation will In the process of cutting, it will cause the consequences of tool gap and uneven material removal, thereby reducing the milling quality of the top surface of the engine block, which will eventually affect the performance of the engine. Optimizing the clamping plan for the top milling process, reducing ...
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IPC IPC(8): G06F17/50G06N3/12G06Q10/04
CPCG06F30/20G06N3/126G06Q10/04
Inventor 杜世昌李贵龙黄德林赵晨邓亚飞
Owner SHANGHAI JIAO TONG UNIV