Based on the demand of training applied innovative talents in mechanical specialty and OBE educational idea, this paper discusses the effect of the integration of discipline competition and professional course teaching mode on improving students' innovative practical ability. At the same time, this paper also puts forward the reform of professional teaching mode based on subject competition, which provides more practical measures for students to transform subject competition and professional knowledge into ability.

Monocrystalline silicon is an excellent semiconductor material for integrated circuits. Its surface quality has an enormous effect on its service life. The surfaces are formed by ultra-precision machining using nano-grinding, one of the technologies that can achieve surface roughness at the nano- or sub-nano-scale. Therefore, subsurface damage of monocrystalline silicon in nano-grinding was studied by establishing a molecular dynamics simulation model, and the impact of machining parameters on the force–thermal behavior was analyzed. The results reveal that the mechanism of subsurface damage is mainly structural phase transformation and amorphization. In nano-grinding of monocrystalline silicon, the tangential grinding force has a relatively major role in material removal. With increasing grinding depth and grinding speed, the grinding heat rises, and a certain degree of high temperature strengthens the toughness of the material, improving the subsurface quality of monocrystalline silicon. Therefore, subsurface damage in monocrystalline silicon can be controlled by reducing the grinding depth and increasing the grinding speed.

In recent decades, the additive manufacturing technology has made great progress in software and methods in various fields, and gradually explored in a deeper and broader manner. It has changed from the mature homogenized lattice type and model design to a non-uniform direction. It has also started to improve from the aspects of material innovation, additive manufacturing printing technology, etc., to change the additive manufacturing technology and control parameters in the manufacturing process, Furthermore, the model or part can be improved to have better mechanical properties, such as stiffness, strength and wear resistance, which provides an important research methodology for the better development of this direction. These aspects include the software used, the type of structural analysis, the software used and verification, as well as the methods applied in the study of variable density lattices and the application and verification of improved research methods. In addition, there are density design optimization, variable density lattice design and lattice geometric characteristics’ design in geometric topology optimization design. The expected design of the model or part at the design level has reached the ideal model or part, which provides both a framework and ideas for the future research direction of non-uniform lattice design and a broader field of application, and will promote the future research and development prospects of variable density lattices.

Aiming at the problems of low automation level, high labor intensity, and large investment capital for the overall upgrade of the traditional geothermal drilling platform faced by the exploitation of traditional geothermal resources, a drilling auxiliary robot consisting of a mechanical assistant and a rotary buckling robot is designed. According to the functional requirements, the overall structural design of the drilling assistant robot for geothermal drilling platform is carried out, and the three-dimensional digitized design of the mechanical assistant and the rotary buckle manipulator is given. The results of the study contribute greatly to reducing the labor force of geothermal drilling operations and provide a reference for the automation design of geothermal drilling rig platforms.