Structural components are various physical components that can be formed after being hoisted, assembled, and installed during the construction process. Metal structural parts are the main components of the equipment skeleton and appearance. In order to meet the performance requirements of long life, lightweight structure, etc., a large number of new technologies, new structures, and new materials are used. The following is a brief introduction to the development trends of metal structural parts. and process improvement plans:
1. Development trend of new structural parts
(1) Large-scale structure
Compared with the previous welding and assembly of small structural parts Model, the use of large overall structural parts can greatly reduce the number of structural parts and assembly and welding processes, effectively reduce the weight of the equipment, and improve the strength and reliability of the parts.
(2) Structural complexity
The overall structure of the aircraft is becoming increasingly complex. Most of its shapes are related to the aerodynamic shape of the aircraft, and the peripheral contours and other parts have complex assembly and coordination relationships. At the same time, the thin-walled reinforcement structure makes the structural parts weak and the top structure of the reinforcement complex.
(3) Diversification of materials
With the gradual improvement of the performance of new generation equipment, new high-performance materials are continuously introduced, and high-strength materials and low-density lightweight materials have become the mainstay of structural parts. The two main categories of materials, structural parts materials, have gradually changed from aluminum alloys to aluminum alloys, titanium alloys, and composite materials.
(4) Precision in manufacturing
Precision manufacturing puts forward higher requirements on the shape, position and dimensional tolerance of structural parts to meet the needs of precise assembly.
II. Improvement Plan for CNC Technology
(1) Development of Tool Technology
Tool technology is one of the key technologies of CNC and also limits process efficiency. A technical bottleneck. With the advancement of tool technology, tool materials and tool structures are constantly improving, and there are more and more types of tools. How to reasonably select tools and cutting parameters is the core of improving CNC efficiency.
(2) Development of tooling technology
At present, the clamping method of large-scale structural parts in China is relatively single, and new tooling technology uses a large number of automatic clamps with pneumatic, hydraulic and control systems. Flexible fixtures using CNC multi-point automatic adjustment, vacuum adsorption or mechanical chucks can achieve flexible, rapid positioning and clamping of large structural parts of different shapes on machine tools. It has become the development direction of CNC tooling design and manufacturing and is an important step in improving CNC tooling. Another key technology for efficiency.
(3) Development of process design
The whole process in which process programmers make full use of various process resources to carry out part technology and CNC programming is CNC process design, which is the entire CNC process. A vital link in production. The manufacturing industry is usually faced with multi-variety, small-batch tasks and heavy research and development tasks. CNC process design has become a new bottleneck restricting CNC process.
(4) Development of simulation technology
CNC simulation is one of the core technologies of virtual manufacturing technology, which is mainly divided into geometric simulation and physical simulation. Its main function is to check the correctness of the tool path of the CNC program and the geometric interference and collision problems. To achieve more accurate simulation, the physical phenomena in the process must be studied. At this stage, simulation technology has been used in many manufacturing fields such as cutting tools, automobiles, and molds. It can realize mechanical simulation of the milling process and optimal selection of cutting parameters, and has been successfully used in the military industry.