Category: Manufacturing Technology knowledge

Due to the large thermal expansion coefficient of aluminum alloy parts, it is easy to deform in the process of thin-wall machining. Especially when using free forging blank, the machining allowance is large, and the deformation problem is more prominent. 1. Causes of machining deformation There are many reasons for the machining deformation of aluminum alloy parts, which are related to the material, part shape, production conditions and the performance of cutting fluid. It mainly includes the following aspects: deformation caused by internal stress of blank, deformation caused by cutting force and cutting heat, and deformation caused by clamping force.…

Phosphating is a process of chemical and electrochemical reaction to form phosphate chemical conversion film, which is called phosphating film. The main purpose of phosphating is to protect the base metal and prevent the metal from corrosion to a certain extent; Used for priming before painting to improve the adhesion and anti-corrosion ability of paint film layer; It is used for antifriction lubrication in metal cold working process. 1. Basic principle: The phosphating process includes chemical and electrochemical reactions. The phosphating reaction mechanism of different phosphating systems and materials is complex. Although scientists have done a lot of research in…

With the increasing maturity of microelectronics and computer technology, the development of numerical control technology in China has been promoted. Domestic numerical control systems have been successfully developed, which ensures the quality and performance of numerical control machine tools in China. Because CNC machine tools have the characteristics of strong adaptability to workpiece modification, high machining precision and improving productivity, they have been popularized and applied in various fields. Numerical control technology has been widely used in sheet metal machine tools. It solves the problems of high precision, complex shape and large batch in sheet metal processing. CNC sheet metal…

With the continuous innovation and breakthrough of numerical control technology, five axis machining is adopted by more and more industries, such as aerospace, electric power, shipbuilding, high-precision instruments, mold manufacturing and so on. However, the automatic programming software plays a key role in the five axis machining technology, because the process layout of the tool path, the interference inspection between the tool collet and the workpiece or the fixture, and the identification of the blank residue are all automatically considered by the software, and the programmers can not achieve it through calculation. They just optimize the cutting parameters according to…

With the development of science and technology and the diversification of social needs, the competition of products is becoming more and more fierce, and the renewal cycle is becoming shorter and shorter. Therefore, it is required not only to design new products as soon as possible according to the requirements of the market, but also to manufacture prototypes in the shortest possible time, so as to carry out performance testing and modification, and finally form finalized products. In the traditional manufacturing system, it needs a lot of mold design, manufacturing and debugging, which has high cost and long cycle, and…

In recent years, as people pay more and more attention to environmental issues, automobile manufacturers have been under increasing pressure to improve fuel efficiency. Stricter and more restrictive regulations have brought technical challenges to industrial production and material processing. Among these trends are lower exhaust emissions, lighter bodies and longer service life of parts. The progress in material processing has brought unique opportunities to the field of stainless steel pipe production. Specifically, manufacturers are required to produce such parts. They must have lighter weight, but they must still have anti-corrosion characteristics and meet the strength requirements. In addition, the space…

The random error of machine tool is caused by external conditions and is greatly affected by external conditions. It can be divided into: positioning accuracy error, geometric accuracy error, thermal deformation error and so on. Let's take a brief look at these three errors. 1. Error caused by load deformation of the process system: when turning, the workpiece is often affected by cutting force, clamping force, inertia force, gravity, etc., resulting in corresponding deformation, which eventually destroys the correct relative position between the tool and the workpiece and reduces the machining accuracy of the workpiece. For example, when the stiffness…

As for mechanical design, I believe everyone can read and draw the drawings, but you should also know that the most difficult part of mechanical drawings is dimensioning and technical requirements. So, today, I'd like to introduce some experience that Xiaobian has summed up in his career of mechanical design in the past few years. No more nonsense, empty talk will harm the country, do solid work to prosper the country, and directly start dry goods 1. Remove scale from parts. 2. There shall be no scratch, scratch and other defects damaging the surface of parts on the machined surface…

1、 What is non-standard mechanical design? In short, it is the design of non-standard equipment, non-standard parts and non-standard tooling. For example: C616, C620, C630, c6125, M7475, b650, M131 and other equipment are well-known standard equipment in the machining industry, so there are many special equipment not included in the standard equipment, which is the work goal of non-standard designers. Non standard machinery is a mechanical product that is not finalized. Generally, it can not be bought directly in the market. It should be customized from the manufacturer. The size and shape of machines with the same function may be…

As we all know, machining accuracy refers to the compliance between the actual size, shape and position of the machined part surface and the ideal geometric parameters required by the drawing. Therefore, when we need precision machining, our first response is to find a precision machining equipment, and our inventory of precision machining equipment comes from parameters. In fact, for the definition of this precision, the standards of each country are different. Let's take a rigorous look at those things about accuracy! Accuracy: refers to the closeness between the measured result and the true value. High measurement accuracy means that…