Category: Manufacturing Technology knowledge

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…

As a widely used traditional material, ceramics is exquisite and durable. However, its hard and brittle characteristics make the 3D printing of ceramic materials more difficult. However, once the application is mature, its benefits are very large. Because the traditional ceramic preparation process can only produce products with simple three-dimensional shape, and the cost is high and the cycle is long. The development of ceramic 3D printing technology makes it possible to prepare complex ceramic products. The advantages of 3D printing technology, such as simple operation, high speed and high precision, have injected new vitality into ceramics. There have been…

5、 Die grinding 1. Importance of die grinding Regular grinding of die is the guarantee of punching quality consistency. Regular grinding of the die can not only improve the service life of the die, but also improve the service life of the machine. It is necessary to grasp the correct grinding time. 2. The specific characteristics of the die need to be sharpened For the grinding of the die, there is no strict number of blows to determine whether the grinding is needed. It mainly depends on the sharpness of the cutting edge. It is mainly determined by the following…

1、 Information from waste The scrap is essentially the reflection of the formed hole. The opposite position is the same. By checking the scrap, you can judge whether the gap between the upper and lower dies is correct. If the gap is too large, the waste will have rough and undulating fracture surfaces and a narrow bright zone. The larger the gap, the greater the angle between the fracture surface and the bright zone area. If the gap is too small, the waste will show a small angle fracture surface and a wide bright band area. The excessive gap forms…

The positioning accuracy of NC machine tool refers to the position accuracy that can be achieved by the movement of each coordinate axis of the machine tool under the control of NC device. The positioning accuracy of NC machine tool can be understood as the motion accuracy of machine tool. Ordinary machine tools are fed manually, and the positioning accuracy mainly depends on the reading error, while the movement of NC machine tools is realized by digital program instructions, so the positioning accuracy depends on the NC system and mechanical transmission error. The movement of the moving parts of the…

The steel grade consists of numbers, letters and numbers. The letter symbols of non oriented and oriented silicon steel are "W" and "Q" respectively The thickness is placed in the front, the letter symbol is placed in the middle, and the iron loss value is placed in the back, such as 30q113. In oriented silicon steel, the letter symbols "g" and "Q" with high magnetic induction are placed together, such as 30qg113 The number after the letter represents 100 times the iron loss value (w / kg). The letter "g" indicates that it is tested at high frequency; If "g"…

Welding steel includes carbon steel for welding, alloy steel for welding and stainless steel for welding. Its brand is represented by adding the symbol "H" to the head of various welding steel brands. For example: "H08", "h08mn2si", "h1cr18ni9" For high-grade and high-quality welding steel, the symbol "a" is added at the end of the brand. For example: "H08A", "08mn2sia".