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What errors may occur during CNC machining and CNC machining​?

 CNC machining and numerical control machining are a method to control the movement of machine tools and the production process of machining through computer digitization and information digitization. It is an intelligent numerical control device developed as an economical, high-speed, reliable, multi-functional, intelligent, and open structure. CNC machining is also an important indicator that can measure the continuous level and comprehensive ability of a safety technology, as well as the degree of modernization of related science and technology capabilities, especially in aviation, biology, medical and other high-tech cultural industries, and it is also a powerful indicator. reflect. So, what errors may occur during CNC machining and CNC machining? Let us understand together:   The use of approximate machining motion or approximate tool contours causes errors in the CNC principle of machining. The reason why it is called machining principle error is because of the error in machining

What are the rules for metal stamping die scrap tube?

The Purpose Standardize the management of the scrapping of the company's metal stamping dies, prevent the loss of company assets, and formulate this system specially. Scope of application It is suitable for the management of the company's scrap molds. Definition If the molds listed in the assets of the company fall under one of the following circumstances, the use management department may apply for scrapping. 1. Molds that exceed the specified service life. 2. The mold is severely damaged by accidents or accidents, and molds that cannot be repaired or have no repair value. 3. Metal stamping dies that have not reached the service life, but due to safety, quality, efficiency and other issues, the repair still fails to meet the minimum requirements of the customer's product process or affects the production safety and efficiency. 4. Product customers have stopped placing orders or have not placed orders for molds in several years. 4. Responsibilities 1. Responsibilities of th

TI TPS65266RHBR

# TPS65266RHBR TI TPS65266RHBR New Switching Voltage Regulators 2.7Vto6.5V InputV3A 2A/2A Output Cur Syn , TPS65266RHBR pictures, TPS65266RHBR price, #TPS65266RHBR supplier ------------------------------------------------------------------- Email: [email protected] https://www.slw-ele.com/tps65266rhbr.html ------------------------------------------------------------------- Manufacturer: Texas Instrument s  Product Category: Switching Voltage Regulator s  RoHS:  Details   Mounting Style: SMD/SMT  Package / Case: VQFN -32  Output Voltage: Adjustable  Output Current: 2 A, 3 A  Number of Outputs: 3 Output  Input Voltage MAX: 6.5 V  Topology: Buck  Input Voltage MIN: 2.7 V  Switching Frequency : 1 MHz  Minimum Operating Temperature: - 40 C  Maxim um Operating Temperature: + 85 C  Series: TPS65266  Packaging: Cut Tape  Packaging: MouseReel  Packaging: Reel Switching Voltage Regulators 2.7Vto6.5V InputV3A 2A/2A Output Cur Syn

The simplified radiator model is more suitable for engineering calculations

In the actual design of automobile radiators, it is necessary to comprehensively consider heat transfer performance, resistance performance, economy and reliability. The model simplification simplifies the heat dissipation belt with louvered fins into multiple rectangular parallelepiped porous media regions. Due to the thin wall and large area of ​​the radiator tube studied, the radiator tube wall is simplified into a double side wall surface of corresponding thickness to reduce the number of solid meshes and reduce the coupling heat transfer in the cold and hot sides of the radiator. Calculate the workload. The simplified radiator model is more suitable for engineering calculations. The creation and meshing of the watershed structure is used to complete the meshing of the radiator calculation model. After the simplified radiator core part and the air flow area structure are relatively regular, the hexahedral structured grid is generated by the division method.

The water chamber part of the radiator uses a division method. Setting of boundary conditions. Inlet boundary conditions: According to the control method of the entrance test conditions in the heat transfer wind tunnel test of the automobile radiator, the air inlet and the water inlet adopt the speed entrance, and the speed direction is perpendicular to the entrance plane. According to the entrance measured by the test The data is set for speed and temperature. Outlet boundary conditions: pressure outlet boundary conditions are used for both the water outlet and the air outlet. The static pressure and “backflow” conditions need to be defined on the pressure outlet boundary. The “backflow” condition is the boundary condition used when a backflow occurs at the pressure outlet boundary. Wall boundary conditions: Because all the walls of the studied radiator are static, there is no surface chemical reaction, and radiation is ignored, so this article mainly sets the thermodynamic boundary conditions on the wall. Because strict thermal insulation is carried out in the heat transfer wind tunnel test, it is assumed that the outer wall of the air channel and the outer wall of the water are adiabatic walls, that is, the heat flux is set to be. According to the simplification of the radiator model, the wall of the water pipe becomes a double-sided wall surface with corresponding wall thickness. Only by coupling the front and back sides in the calculation, the solver can directly use the flow field variables of the adjacent grid to calculate the wall surface. The heat exchange.

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