Ningbo Hewcho

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 ...

NPT, PT, G are all pipe threads. Now we will introduce information about thread type to you.  NPT is the abbreviation of National (American) Pipe Thread. It is a standard American 60 degree taper pipe thread. It is used in North America. The national standard can be consulted in GB / T12716.  PT is the abbreviation of Pipe Thread, which is a 55 degree sealed conical pipe thread. It belongs to Wyeth thread family and is widely used in Europe and some Commonwealth countries. G is a 55 degree non-threaded sealed pipe thread, and it belongs to the Wyeth thread family. It is marked as G, which represents cylindrical thread. The national standard can be found in GB/T7307. In addition, 1/4, 1/2 and 1/8 in thread refer to the diameter of thread size, and the units used are inch. Insiders usually use the points to refer to the thread size, one inch is equal to 8 points, 1/4 inch is 2 points, and so on. G is the general designation of pipe threads (Guan). The divisio...

Shaft parts are one of the typical parts in machining. Shaft parts are revolving parts whose length is larger than diameter, and its surface mainly consists of several cylindrical surfaces, conical surfaces, holes and threads. It's a little complicated, but do not worry about it. Let's talk about "shaft" together today. The spindle of a machine tool is a typical shaft part, and it is one of the key parts of a machine tool. It transfers the furniture which is at the end of the spindle to the workpiece or tool by means of swirling motion and torque. Therefore, the spindle requires torque and bending moments during operation, and it also requires a high precision of rotation. Therefore, the manufacturing quality of the spindle will directly affect the working accuracy and service life of the entire machine. A series of technical requirements are specified in the spindle part drawing, such as dimensional accuracy, shape and position tolerances, surface roughness, co...

The precision of boring machining is very high, it can reach IT8~IT7, and the aperture can be controlled within the dimensional accuracy of 0.01MM. For precision boring, the machining accuracy can reach TT7- IT6, and the surface quality is good. For general boring, the value of surface roughness is Ra 1.6 to 0.8μm. Let's take a look at how to process boring.   The step of boring hole and some matters needing attention Install boring tool It is very important to install the boring tool, especially for work adjustment which based on eccentric principle. After installing the boring tool, we must pay attention to observe whether the plane on the blade edge is on the same level with the feed direction of the head of boring tool? Installing on the same level can ensure that several cutting edges are at normal machining cutting angles. Test the boring with boring tool The boring tool is adjusted according to the requirements of the process manufacturing to reserve ...