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For coating construction, the film thickness is the most important control factor in the coating process, and its significance lies in:  (1) Prevent coating defects caused by improper film thickness. According to experience, more than half of the appearance defects of the coating in the field production are caused by improper control of the coating film thickness. Some common coating defects such as sagging, thin paint layer and exposed bottom color are directly related to the out of control of film thickness, and some defects are also indirectly related to this. For example, if the film thickness of the first…

What is a cylindrical milling cutter? A milling cutter is a rotary cutter with one or more cutter teeth for milling. We commonly use 45 degree chamfering milling cutter for machining plane on horizontal milling machine. The cylindrical milling cutter has the cutter teeth distributed on the circumference of the milling cutter. Cylindrical milling cutters are divided into straight teeth and spiral teeth according to the tooth shape, and coarse teeth and fine teeth according to the number of teeth. The spiral tooth coarse tooth milling cutter has few teeth, high tooth strength and large chip space, which is suitable…

What are the reasons for the throwing and picking failure of the patch machine? How to solve it? First of all, it is necessary to make clear whether the feeding of the patch machine is uneven and unable to get the material, or whether the suction nozzle is of the wrong size. Is it because the suction nozzle is deformed or the position is wrong? What do you think of the throwing material of the mounter? It is suggested that in case of material throwing or picking failure, stop the operation of the mounter first, and then check and eliminate…

As we all know, when using a mechanical device, we must first understand what it is, what it is used for, and how to install it. Next, this article will focus on introducing the installation method of the framework oil seal and the matters needing attention in the process of using it? Children's shoes who want to understand quickly follow me to have a look! 1. Installation method of framework oil seal in shell hole When assembling the skeleton oil seal, check whether the inner wall is free of debris, scratches, dust and casting sand. Use special tools to smoothly…

Tool holder is the simplest automatic tool changing device of lathe, and it is also a very important component. The structural form of the tool rest is generally rotary. The tool is installed on the tool rest along the circumferential direction, and radial turning tools, axial turning tools, drill bits and boring tools can be installed. The turning center can also be equipped with axial milling cutter and radial milling cutter. The tool rest of a few CNC lathes is in-line, and the tools are installed along a straight line. Next, the quick screen editor will introduce the use method…

In daily life, three-phase asynchronous motors are widely used, but with the length of their operation time, some fault problems will occur. If you know some common maintenance methods, the service life of the motor will be greatly improved. The following is a brief introduction to the measures taken in case of fault of three-phase asynchronous motor. (1) Ask the operator about the operation before the fault, the process of the fault and the phenomenon of the fault, and learn about the type and specification of the three-phase asynchronous motor, the operation characteristics of the equipment and the maintenance. (2)…

Oil gas separator is a device that separates the crude oil produced by the oil well from the associated natural gas. The oil-gas separator is placed between the submersible centrifugal pump and the protector to separate the free gas in the well fluid from the well fluid. The liquid is sent to the submersible centrifugal pump, and the gas is released to the annular space of the tubing and casing. In this article, the quick screen editor introduces its principle, structure and types. Let's learn about it! Principle of oil-gas separator: The oil-gas separation element is the key component to…

1. The understanding of preloading of lead screw, wire rail and bearing is high-speed low load light preloading and low-speed heavy load high preloading. The preloading of the screw rod shall be 0.1 times of the dynamic load (according to THK), and the preloading of the rail shall be 0.13 times of the dynamic load (according to SCHNEEBERGER). The light, medium and heavy preloading of the bearing have detailed data on different samples (but the value is small). Moreover, for the lead screw, wire rail and bearing, generally speaking, when the load (axial load for the lead screw) exceeds three…

Flue check valve is also known as reverse flow valve, check valve, back pressure valve and one-way valve. This type of valve is automatically opened and closed by the force generated by the flow of the medium in the pipeline, and belongs to an automatic valve. Many people will wonder whether it has any effect on earth? Is it worth installing one? The following quick screen editor will tell you whether it is worth installing a flue check valve! The check valve is used in the pipeline system. Its main function is to prevent the backflow of the medium and…

In order to ensure the accuracy of NC machining, we conduct data processing on the three-dimensional acceleration sensor and other signals according to the signal time-domain analysis and frequency-domain analysis methods, extract the eigenvalues, and normalize the obtained eigenvalues, establish a neural network model, input the eigenvalues into the neural network for training, input the features to be tested after the training, and output the accuracy evaluation decision results from the neural network. Intelligent evaluation system model According to the hardware system, the machining accuracy evaluation model is established. The model is composed of different layers, including signal acquisition layer,…