Category: Manufacturing Technology knowledge

1. Basic requirements 1.1 the assembly must be carried out in accordance with the design, process requirements, this regulation and relevant standards. 1.2 the assembly environment must be clean. The assembly environment temperature, humidity, dust prevention, lighting and shockproof of high-precision products must comply with relevant regulations. 1.3 all parts (including purchased and outsourced parts) must have inspection certificates before assembly. 1.4 parts must be cleaned and cleaned before assembly, without burr, flash, scale, rust, chips, sand, dust and oil, and shall meet the corresponding cleanliness requirements. 1.5 parts shall not be bumped, scratched or rusted during assembly. 1.6 parts…

Based on the cold machining technology of material removal, since the United States used a single point diamond tool to process electrolytic copper in the early 1960s and successfully cut the mirror, qualitative changes have taken place in the machining accuracy, which promoted the emergence and development of ultra precision machining technology. It is generally believed that the machining technology with the size and shape position error of the machined parts less than a few tenths of a micron and the surface roughness between a few nanometers and a dozen nanometers is an ultra precision machining technology. At present, ultra…

The basic requirement for the cutting tool to be able to cut metal is that the cutting tool must be harder than the material to be cut, and the material to be cut must have enough force to be fixed, so that the tool can cut into the workpiece when applying force. After these requirements are met, the second is to have enough power to overcome the resistance of workpiece materials. In addition, the geometry of the tool will also affect the actual cutting effect and even the result. Choosing proper tool geometry can increase tool life, maintain machining accuracy,…

With the wide application of NC machine tools in production practice, NC programming has become one of the key problems in NC machining. In the process of NC programming, tools should be selected immediately in the state of human-computer interaction. Therefore, programmers must fully understand and master the cutting tools, so as to ensure the processing quality and efficiency of parts, give full play to the advantages of NC machine tools, and improve the economic benefits and production level of enterprises. Now let's talk about the tools commonly used in CNC. 1. Application of milling cutter Milling is the most…

The accuracy of the milling cutter can be compared with the accuracy of the measuring tool, so we should pay attention to and understand its correct use, in order to accurately install the milling cutter on the machine for milling. The clamping methods of milling cutter can be roughly divided into the following types: side fixed type, collet type, hydraulic type, tooth fixed type and heat shrinkable type. Side fixed Weldon It has extremely high holding force, so it is often used in heavy cutting occasions. It is suitable for heavy cutting of traditional machining methods or traditional machines. However,…

Many 3D printed metal parts need to be machined to produce precise surfaces, but 3D printed parts are often lightweight parts with complex geometry, which brings challenges to subsequent machining. When machining 3D printing parts, we need to consider a series of problems, such as whether the stiffness of 3D printing meets the requirements of machining, and how to clamp these complex 3D printing parts with fixtures. Through a 3D printing metal parts machining case shared by additive manufacturing experts, we jointly discuss the challenges and solutions in 3D printing parts machining. 3D printing is a flexible technology with less…

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…