Category: Manufacturing Technology knowledge

Metal cutting machine tools (hereinafter referred to as machine tools) are a large number and a wide range of equipment. Their structural characteristics, machining accuracy, degree of automation, working conditions and operating environment conditions are very different, and they have different requirements for lubrication systems and lubricants used. 1、 Features and requirements of machine tool lubrication: 1. The main parts of machine tools are mostly typical mechanical parts, which are standardized, generalized and serialized. For example, the lubrication conditions of sliding bearings, rolling bearings, gears, worm gear pairs, rolling and sliding guides, screw drive pairs (screw nut pairs), clutches, hydraulic…

1. Check the drawing to confirm whether it is the first corner view or the third angle view, and confirm whether the bending direction is correct according to the drawing using the perspective drawing method. 2. Confirm whether the material and plate thickness are correct according to the drawing, inspect each bending dimension according to the drawing, and give priority to the tolerance dimension and hole to edge dimension. 3. Check whether the bending tool mark meets the product requirements. If the surface is not treated, A1 surface is not allowed to have defects such as indentation, indentation and scratch.…

What is spinning technology? It is also called metal spinning forming technology. It is a technology that makes the stress point go from point to line, from line to surface through rotation, and at the same time, gives a certain pressure in a certain direction to make the metal material deform and flow along this direction to form a certain shape. Here, metal materials must have plastic deformation or flow performance. Spinning is not equivalent to plastic deformation. It is a complex process integrating plastic deformation and flow deformation. It should be pointed out that the spinning technology is not…

High cutting speed and cutting precision are the main differences between CNC cutting machine and hand-held cutting and profiling cutting. Although the cutting speed of the CNC cutting machine is fast and the cutting accuracy is high, many customers find that the processing efficiency has not been improved much after they bought the CNC cutting machine. The main reason is that the users do not have a thorough understanding of the relevant knowledge of the CNC cutting machine and can not use it easily. What should new users pay attention to when using CNC cutting machine to effectively improve cutting…

Heat resistant steel is often used to manufacture parts and components working under high temperature in industrial sectors such as boilers, steam turbines, power machinery, industrial furnaces, aviation, petrochemical, etc. In addition to high temperature strength and resistance to high temperature oxidation corrosion, these cast parts also require sufficient toughness, good machinability, weldability and certain structural stability according to different applications. China began to produce heat-resistant steel in 1952. Later, some new low alloy heat strength steels were developed, so that the working temperature of pearlite heat strength steels was increased to 600 ～ 620 ℃; In addition, some new…

Technological Countermeasures for Reducing Welding Deformation of Large Structural Parts Large structure is the skeleton of construction machinery products, and also reflects the design level and manufacturing level of manufacturers. Due to the important role of structural members in bearing capacity, appearance modeling and product function realization, special attention should be paid to the design and manufacturing of construction machinery products. Large structural parts are difficult to support because of their large size, many welding parts, high requirements for part size accuracy and location accuracy, and especially the overall deformation, which has been a major problem for technologists. In this…

At present, electroplating technology is widely used in various fields of national production, and only careful operation can effectively save energy and protect the environment. Here is a brief introduction to some basic knowledge about electroplating process. Electroplating process classification: acid bright copper electroplating nickel/gold electroplating tin. Process flow: pickling → full plate copper electroplating → acid degreasing → micro etching → pickling → tin plating → pickling → pattern copper plating → nickel plating → citric acid dipping → gold plating. Process description. (1) Pickle. ① Function and purpose: remove the surface oxides and activate the surface. The general…

Ferrochrome ore belongs to the category of special sand in molding materials. Its main mineral composition is FeO. Cr2O3, with a density of 4.0 ～ 4.8g/cm3, a Mohs hardness of 5.5 ～ 6, and a refractoriness greater than 1900 ℃. Ferrochrome ore has a good effect of resisting alkaline slag, and does not react chemically with iron oxide, etc. As the thermal conductivity of chromite sand is several times higher than that of silica sand, and solid phase sintering occurs during molten metal pouring, it is beneficial to prevent the penetration of molten metal. According to these advantages of chromite…

Friction welding is a solid pressure welding method that uses the heat generated by the friction between the end faces of weldments to make the end faces reach the thermoplastic state, and then rapidly applies the upset force to achieve welding. Friction welding has the following advantages: (1) The welding quality is stable, the size accuracy of weldments is high, and the rejection rate of joints is lower than that of resistance butt welding and flash butt welding. (2) High welding productivity, 5-6 times higher than flash butt welding. (3) Suitable for welding dissimilar metals, such as carbon steel, low…

Aluminum is widely used because of its easy processing, good visual effect, rich surface treatment means, etc. How much do you know about the surface processing technology of aluminum and aluminum alloys in daily products? Mobile phone frame, charging bank, wire drawing rivet and lantern rivet are all made of aluminum alloy. Aluminum itself has the effect of waterproof and anti-corrosion, and is light in weight. The following sections will briefly describe the six major surface processing technologies of aluminum and aluminum alloys. 1. Sand blasting (shot blasting) The process of cleaning and roughening metal surfaces by the impact of…