Prediction Method of Grinding Burr Shape of Valve Core Based on Energy Conservation

A technology of energy conservation and prediction method, applied in the field of machining, can solve the problems of cumbersome burr shape detection procedures, small grinding burr size, and poor parameter reliability.

Active Publication Date: 2022-02-25
SHANGHAI JIAOTONG UNIV +1
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  • Abstract
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Problems solved by technology

[0004] The invention aims at the complexity of the grinding process in the prior art, the size of the grinding burr is too small, the reliability of the parameters obtained through detection in the grinding process is poor; and other problems, a method for predicting the shape of burrs in valve core edge grinding based on energy conservation is proposed. Based on the in-depth analysis of the formation mechanism of burrs, the formation of burrs can be significantly reduced or suppressed by establishing a mathematical model and optimizing the grinding parameters.

Method used

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  • Prediction Method of Grinding Burr Shape of Valve Core Based on Energy Conservation
  • Prediction Method of Grinding Burr Shape of Valve Core Based on Energy Conservation

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Embodiment Construction

[0019] Such as figure 1 and figure 2 As shown, the energy conservation-based method for predicting the shape of the burr on the edge of the valve core involved in this embodiment, the specific steps include:

[0020] Step one, such as figure 1 As shown, when the grinding process reaches the edge of the workpiece, due to the decrease of the stiffness of the material at the edge of the workpiece, the elastic and plastic deformations are gradually produced under the action of the tool, and the material stiffness of the edge of the workpiece decreases, and the elastic and plastic deformations are gradually produced under the action of the abrasive grains , the material on the edge of the spool gradually deforms towards the direction of grinding feed, and finally forms a figure 1 glitches shown in . The burr height at the grinding exit includes: the height of the burr root, that is, the burr height h 1 , and the chip bending height h 2 , then the overall height of the exit bu...

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Abstract

A method for predicting the shape of grinding burrs on valve core edges based on energy conservation. According to the friction-plough-cutting removal mechanism of materials in the grinding process, the theory of the fourth deformation zone and the chip bending model, based on the law of energy conservation, a valve is established. The prediction model of tiny burr shape while grinding while the core is working, realizes the optimization of the grinding process according to the relationship between the grinding depth, feed speed, and grinding wheel speed on the burr shape. The invention establishes a shape prediction model of tiny burrs in edge grinding based on energy conservation, provides a basis for active control and precise removal of burrs, and can significantly reduce or inhibit the formation of burrs.

Description

technical field [0001] The invention relates to a technology in the field of mechanical processing, in particular to a method for predicting the shape of a grinding burr on a valve core edge based on energy conservation. Background technique [0002] The edge of the servo valve spool is the intersection edge of each step end surface of the spool and the outer circular surface. The requirements for these edges are not to be blunt, to keep sharp edges and to have no burrs. The geometric shape of the edge of the spool and the accuracy of the axial dimension determine the performance of the servo valve, and are the key factors to ensure that the servo valve can be in the correct position during the process of oil inlet and outlet. As the key characteristics of the servo valve, the overlap of the spool and valve sleeve is the key characteristic of the servo valve. The control of the matching size, that is, the overlap, has a direct relationship with the performance of the servo ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/00B24B9/02
CPCB24B1/00B24B9/02
Inventor 陈明安庆龙蔡晓江明伟伟陶正瑞周如好
Owner SHANGHAI JIAOTONG UNIV
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