Special attention should be paid in the process of mechanical design

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In the process of mechanical design, special attention should be paid 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.); Kinematic calculations are then made to determine the motion parameters of each moving component (speed, linear velocity, acceleration, etc.).

2. Dynamics 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 each main part, and accurately check and calculate some important or complex appearance and force conditions.

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

4. Design of assembly sketch: The shape and size of all parts need to be structured on the sketch, and the structure and size of each part and its matching tolerance and other factors need to be well coordinated, and the material, structure, process, etc. of the designed parts are comprehensively considered, so that all parts 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 for auxiliary design and system analysis, and it is very important to select the appropriate mechanical design software. At present, the mainstream 3D design software in China mainly includes the following:

SOLIDWORKS: Biased towards mechanical structure design, this software is easy to learn, high drawing efficiency, and can directly refer to existing parts in assembly design to generate new parts. Whether the design is assembled using a "top-down" or "bottom-up" approach, SolidWorks will greatly improve the efficiency of the design with its easy-to-use operation.

Pro/Engineer: Design is based on a unified base database, the data in the project is all from a single database, as a new standard in the field of mechanical CAD/CAE/CAM in the world and 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 great advantages for some surface modeling and more complex structural processing.

UG (UnigraphicsNX): It is powerful, can easily realize the construction of various complex entities and shapes, and provides digital modeling and verification means and synchronous modeling for users' 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, users can easily and quickly make repeated modifications to products under the intelligent tree structure. The advantage of CATIA is its pleasing interface, ease of use and powerful features in specialized industries such as automotive, aerospace, and shipbuilding.

Mastercam: It integrates 2D drawing, 3D solid modeling, surface design, voxel flattening, CNC programming, toolpath simulation and photorealistic simulation and other functions. Powerful and stable modeling capabilities enable the design of complex curved and curved parts, while reliable toolpath calibration simulates the entire process of part machining. So Mastercam's strength lies in CNC machining, which is simple and easy to use, and the resulting 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, which requires the comprehensive application of theories and ideas in 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 and new technologies to speed up the design speed and improve the quality of the design, and better meet the increasingly fierce market competition needs. In the future, there will be a variety of industries need professional, authoritative, standard design library, engineers will design requirements together with materials, manufacturing methods and cost constraints and other parameters input can quickly generate design solutions, through the continuous iterative learning of artificial intelligence system, the production of design solutions will be more and more mature and advanced, and even some complex institutional forms are traditional manufacturing methods can not do, but the use of advanced additive technology 3D printing and other manufacturing methods can be easily realized.

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 of mechanical design engineers will be greatly improved. In the future, after the engineer communicates and docks 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 the relevant technical parameters and requirements, call the expert database by artificial intelligence, and conduct deep learning exploration, and he can quickly outline a set of conceptual design solutions and further communicate with customers. 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!


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