Special attention should be paid to the process of mechanical design

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

1. Kinematic calculation of the machine: according to the determined structural scheme, determine the parameters of the raw 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 speed, acceleration, etc.).

2. Dynamic calculation of the machine: combined with the structure and motion parameters of each part (torque, pressure, heat, etc.), calculate the size and characteristics of the load and yield strength of the main parts, and carry out accurate verification and calculation for some important or major parts with complex shape and force conditions.

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

4. Design of assembly sketch: it is necessary to carry out structural design of the shape and size of all parts on the sketch, and it is necessary to coordinate the structure and size of each part and its matching tolerances and other factors, and comprehensively consider the materials, structure and manufacturability of the designed parts, so that all parts have a reasonable design.

In order to meet the high performance requirements of mechanical products, 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 appropriate mechanical design software. At present, the mainstream 3D design software in China mainly has the following types:

Solidworks: Inclined to mechanical structure design, this software is easy to learn, drawing efficiency is high, assembly design can directly refer to the existing parts to generate new parts. Whether the design uses a "top-down" or "bottom-up" approach to assembly design, SolidWorks will dramatically increase the efficiency of the design with its easy to use operation.

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

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 has become a mainstream application of three-dimensional design in the mold industry.

CATIA: It has advanced hybrid modeling technology, whether it is solid modeling or surface modeling, under the intelligent tree structure, users can easily and quickly modify the product. CATIA's strength lies in its visually pleasing interface, easy to use and powerful features that have a strong advantage in specialized industries such as automotive, aerospace, and shipbuilding.

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

With the increasing development of science and technology, the future of mechanical design will develop in the direction of intelligence, and it is necessary to comprehensively apply the theories and ideas of multiple disciplines. Traditional mechanical design relies more on the knowledge, experience and skills of mechanical engineers, and in the era of intelligent big data, engineers can gradually use artificial intelligence, big data, cloud networking, additive manufacturing and other high-tech to speed up the speed of design and improve the quality of design, to better meet the increasingly fierce market competition needs. In the future, there will be professional, authoritative and standard design libraries needed by various industries. Engineers can quickly generate design solutions by input design requirements together with parameters such as materials, manufacturing methods and cost constraints. Through continuous iterative learning of artificial intelligence systems, the design solutions produced will become more and more mature and advanced. Even some complex forms of mechanism can not be done by traditional manufacturing methods, and the use of advanced additive technology 3D printing and other manufacturing methods can be easily achieved.

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 mobile office for mechanical design engineers will be greatly improved. After the engineer communicates with the customer's opinions and requirements at the customer's site, he can open the artificial intelligence mechanical design interface of the mobile phone on the spot, input relevant technical parameters and requirements, artificial intelligence calls the expert database, and conduct deep learning exploration, so that he can quickly sketch out a set of conceptual design schemes, and further communicate with the customer. With the blessing of artificial intelligence and big data, the cycle of mechanical design can be greatly reduced, so that products can quickly enter the market!