In the process of mechanical design should pay special attention to the following points:

1. Kinematics calculation of the machine: according to the determined structural scheme, determine the parameters of the original moving parts (power, rated speed, conversion rate, etc.); Then do the kinematics calculation, so as to determine the motion parameters of each moving component (speed, linear velocity, acceleration, etc.).

2. Machine dynamics calculation: combined with the structure and movement parameters of each part (torque, pressure, heat, etc.), calculate the size and characteristics of the load and yield strength of the main parts, and to some important or shape and force complex main parts for accurate checking calculation.

3. Calculation of working capacity of parts: calculation criteria must be reasonably formulated with reference to the general failure situation of zero and parts, working characteristics, environmental conditions, etc. Generally, there are strength, stiffness, vibration stability, life and other criteria. By calculation or analogy, the basic size of components and material strength can be determined.

4. Design of assembly sketch: On the sketch, structural design should be carried out on the shape and size of all parts, and the structure and size of each part and its matching tolerance should be well coordinated, and the materials, structure and technology of the designed parts should be comprehensively considered, so that all parts can have the most reasonable design.

In order to meet the high requirements of mechanical product performance, a large number of computer technology is used in mechanical design to assist design and system analysis, and it is also very important to choose the right software for mechanical design. At present, the mainstream 3D design software in China mainly includes the following types:

Solidworks: inclined to mechanical structure design, this software is simple and easy to learn, drawing efficiency is high, assembly design can directly refer to the existing parts to generate new parts. Regardless of design. From the top down. The method remains the same. From the bottom up. SolidWorks will greatly improve the efficiency of design with its easy to use operation.

Pro/Engineer: Design is based on a unified base of the database, engineering data all from a single database, as a new standard in the field of mechanical CAD/CAE/CAM in today's world has been recognized and promoted by the industry, is now one of the mainstream mechanical design software, especially in the domestic product design field occupies an important position. Compared with Solidworks 3D software, this software is a little more difficult, for some surface modeling and more complex structure processing has a greater advantage.

UG (UnigraphicsNX) : It is powerful, it can easily realize the construction of various complex entities and shapes, and provides digital modeling and verification means and synchronous modeling for the user's product design and processing process, so it becomes a mainstream application of mold industry 3D design.

CATIA: It has advanced hybrid modeling technology, whether solid modeling or surface modeling, under the intelligent tree structure, users can easily and quickly make repeated modifications to the product. CATIA's strength lies in its pleasing interface, easy to use and powerful features, which have strong advantages in specialized industries such as automotive, aerospace and shipbuilding.

Mastercam: It integrates 2D drawing, 3D solid modeling, surface design, voxel integration, NC programming, tool path simulation and realistic simulation in one. The powerful and stable modeling function can design complex curve and surface parts, and the reliable tool path verification function simulates the whole process of parts processing. Therefore, Mastercam is strong in NC machining, simple and easy to use, and the NC program generated is simple and efficient.

With the development of science and technology, the future of mechanical design will be towards the direction of intelligent development, which needs to be integrated into the theory and thought of multiple disciplines. Traditional mechanical design relies more on the knowledge, experience and skills of mechanical engineers, but in the era of intelligent big data, engineers can gradually use artificial intelligence, big data, cloud networking, additive manufacturing and other high-tech to accelerate the speed and improve the quality of design, to better meet the increasingly fierce market competition demand. In the future, there will be professional, authoritative and standard design libraries required by various industries. Engineers can quickly generate design solutions by input design requirements together with materials, manufacturing methods and cost constraints, etc. Through continuous iterative learning of artificial intelligence system, the design solutions produced will become more and more mature and advanced. Even some complex mechanism forms are unable to be achieved by traditional manufacturing methods, but can be easily achieved by advanced additive technology, 3D printing and other manufacturing methods.

Under the influence of various technological revolutions in the new era, mechanical design will become more intelligent and modular, mechanical products will be more lightweight and green, and the possibility of mechanical design engineers working on the move will be greatly improved. In the future, after the engineers communicate with the customers' opinions and requirements on the site, they can open the artificial intelligence mechanical design interface of the mobile phone on the spot, input relevant technical parameters and requirements, obtain the expert database by artificial intelligence, conduct deep learning and exploration, and quickly sketch out a set of conceptual design schemes, and further communicate with the customers. With the support of artificial intelligence and big data, the cycle of mechanical design can be greatly reduced, so that products can quickly enter the market!