Ningbo Hewcho

The processing technology of  precision mechanical parts  is not limited to the national defense and Aeronautics and Astronautics, and it has been extended to many fields of national economy, and the scale of the application has also increased greatly. Well, do you know the scope of the application of  precision mechanical parts ?  Computers, modern communications, film and television communication and other industries now need precision, ultra-precision processing equipment, as its rapid development of the support conditions. The precision and ultra-precision machining of the computer disk, the magnetic head of the VCR, the multifaceted prism of the laser printer, the photoreceptor of the photocopier, and other parts, all of them adopt the high efficient and large batch production mode. Sophisticated and ultraprecision processing technologies in developed countries such as the United States, Britain, Japan, Germany, and Holland are in the front row in the world. Thi...

Surface roughness is a very important index in the field of machining parts. So you know how to choose the surface roughness when  machining parts ? Next, we will share it with you.  Surface roughness is an important technical index to reflect the micro-geometric error of the surface of the parts. It is the main basis for the inspection of the surface quality of the parts, and the selection of the product is directly related to the quality, service life and production cost. There are three ways to select the surface roughness of machine parts, they are the algorithm, test method, and the analogy method. In the design of mechanical parts, the most common method is the analogy method. This method is simple, rapid and effective. The application of analogy requires to need sufficient reference materials. All the existing mechanical design manuals have provided comprehensive information. And the most commonly used surface roughness is the tolerance grade. In general, the smaller th...

In the process of processing  machining parts , arranging the heat treatment process reasonably can make the cold and hot working procedures cooperate better and avoid the deformation caused by heat treatment. Do you know how to arrange the location of heat treatment reasonably? 1. Preliminary heat treatment:  The purpose of the preliminary heat treatment is to eliminate the internal stress produced in the manufacturing process, improve the cutting performance of the metal material, and prepare for the final heat treatment. The preparation of the heat treatment is tempered, annealed, normalizing, etc. And after work, it is beneficial to eliminate residual internal stress. 2. Final heat treatment:  Final heat treatment should be arranged after rough machining and semi-finishing, before or after fine finishing. Heat treatment with large deformation, such as carburizing, quenching and tempering, should be arranged before fine finishing in order to correct the deformation of ...

Machining process specification is one of the process documents, and it stipulates the parts machining process and operation method. Under specific production conditions, the reasoning process and method of operation are written into a process document according to the prescribed form. After approval, it can be used to guide the production. So do you know any tips for   machining service ? Let's share with you today. 1. In the machining of mechanical parts, the nippers of the vise will be removed, and the two M4 thread holes should be processed. The two pieces of steel plate 2 with the pliers are 1.5mm thick, and the 0.8mm hard yellow copper plate 3 is riveted with an aluminum head rivet, and they are fastened to the jaw with the M4 head screw 1 to form durable soft tongs. It also protects parts from being damaged and it has interchangeability. 2. It is not convenient to absorb or take small parts from mechanical parts when machining parts. If the iron plate 2 can be sucked under t...

In the field of  machining parts  processing, the purchase of suitable raw materials is the basis. Otherwise, it will not be able to produce good  machining parts  if we buy inferior parts to the process. Do you know how to purchase  machining parts ? Today, we will share with you the procurement skills of  machining parts ! For enterprises, the procurement of spare parts is also a kind of scientific knowledge, the procurement of goods will directly affect the quality and efficiency of enterprise products. 1. the supply units must have ISO9000 certification to provide the required items. 2. the quality guarantee list provided by the quality inspection department must be provided. 3. Quality assurance of raw material for goods. 4. The demanding party must examine and authenticated the supplier's management system and incorporate it into the list of qualified suppliers in the enterprise, and can use the supplies provided by the supplier. The above is the most...

Before processing the precision machine parts, we must pay attention to the density of the material, if the density is too large, the hardness will be large, and if its hardness exceeds the hardness of the lathe, it is impossible to process. It will not only damage the parts, but also cause the danger, for example, the turning tool may fly out to hurt people and so on. So what are the requirements for the machining of precision mechanical parts? Precision machined materials can be divided into two main categories: metal and non-metallic materials. For metal materials, the hardness of stainless steel is the largest, and the following is foundry iron, copper and aluminum. The processing of ceramics, plastics and so on belongs to the processing of non-metallic materials. The stainless steel used for machining  precision mechanical parts : 1. The first is the requirement for the hardness of the material. For some occasions, the higher the material, the better the hardness. Because of...

The burr is found in the process of metal casting, milling or electroplating. It is a metal particle on the surface of  metal parts . Artificial Removal of the Burrs The operator uses tools such as files, sandpaper, grinding head and so on to polish the workpiece and remove the burrs. This method need not have technical requirements for workers. It is suitable for products with small burrs and simple product structure, so it is also widly used in general enterprises to remove burrs. The file is divided into two kinds: artificial file and pneumatic file. The cost of artificial file is expensive, and the burr efficiency is not very high, and it is difficult to remove complex cross holes.  Die deburring The burrs are removed by making punch. It is necessary to make rough die and fine blanking for stamping burrs, and it may be necessary to make the sizing die. This method is suitable for products with simple joint face, and the efficiency and effectiveness of removing burrs ...