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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


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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

Urea for vehicles is a heavy-duty diesel vehicle that meets the National IV emission standards

<p style=”margin: 0px; font-family: Times New Roman; line-height: 22px; white-space: normal;”><span style=”margin: 0px; font-size: 14pt;”>Urea for vehicles is A must-have product for heavy-duty diesel vehicles to meet the National IV emission standards. Urea for vehicles refers to an aqueous urea solution with a urea concentration of 32.5% and ultrapure water as the solvent. The raw materials are urea crystals and ultrapure water. For heavy-duty trucks, buses and other diesel vehicles to meet the National IV emission standards, a suitable SCR system must be selected for exhaust gas treatment, and this system must use urea solution to treat the nitrogen oxides in the exhaust gas. Therefore, vehicle urea solution has become an essential product for heavy-duty trucks and buses to meet the National IV emission standards. <br style=”margin: 0px;” />&nbsp;&nbsp;&nbsp;&nbsp; SCR is the best choice for reducing emissions in China. At present, the current domestic diesel national standard GB19147-2009 requires a sulfur content of ≤350ppm, while the ECR-DOC technology requires a sulfur content of oil products below 10ppm, so there is no promotion condition in China for the time being. SCR can withstand 350ppm of sulfur-containing oil, so it has a technical basis for promotion. Because the fuel economy of the National IV engine using SCR technology is better than EGR technology, the engine changes are small, the fuel and oil requirements are lower, the technology upgrade continuity has advantages, the SCR catalyst has good durability and there is no catalyst blockage Therefore, SCR technology is the most suitable technology route for the emission reduction of heavy diesel vehicles in China's national conditions. <br style=”margin: 0px;” />&nbsp;&nbsp; Urea for vehicles is an aqueous urea solution with a concentration of 32.5% and a solvent of ultrapure water. The raw materials for production are urea crystals and ultrapure water. The key point is the purity of the raw materials . From the perspective of the production process, although the purity requirements for the raw material of urea for vehicles are higher than the requirements for general industrial use, the current domestic process can already meet the actual application needs. The production process of automotive urea is not sufficient to build a high barrier to entry. <br style=”margin: 0px;” />  The domestic vehicle urea is mainly purified from industrial urea. The main principles are: 1) When the temperature is 70-75℃, the urea is hydrolyzed in the aqueous solution. 2) When the temperature is below 30°C, urea will crystallize from the aqueous solution again. 3) Each time of hydrolysis and crystallization, its purity will be greatly improved. Generally, once industrial grade urea is used for hydrolysis and crystallization, it can meet the requirements of automotive urea standards, and the output ratio is 1.5:1. <br style=”margin: 0px;” />  Urea for vehicles must use first-class ultrapure water in the electronics industry. Because the SCR catalyst carrier is prone to metal ion poisoning and loses its catalytic effect, the automotive urea solution must use first-grade ultrapure water in the electronics industry (resistivity ≥18MΩ?cm). The car urea solution will start to freeze at -11°C, and it will freeze completely at -20°C in actual use. The current technology is to reduce the freezing point of the solution by adding a modifier, and adding a heating device to prevent the solution from freezing. </span></p><p style=”margin: 0px; font-family: Times New Roman; line-height: 22px; white-space: normal;”><span style=”margin: 0px; font-size: 14pt;”>Urea solution for vehicles (AdBlue) is a solution prepared with high-purity urea without any other additives and pure water. The urea content in the solution is 32.5% (mass fraction). Most domestic and foreign heavy-duty diesel engine manufacturers have adopted SCR (Selective Catalytic Reduction) technology to meet the requirements of Euro IV and Euro V motor vehicle emission standards. Vehicles that choose SCR technology must add urea solution as a catalytic reducing agent to make the vehicle meet the emission standards. <br style=”margin: 0px;” />&nbsp; &nbsp; &nbsp; Diesel engine exhaust gas treatment fluid (commonly known as: automobile urea, automobile urea, automobile environmental protection urea), called AdBlue in China and Europe, and called in America It is DEF and is called ARLA32 in Brazil. AdBlue is a high-purity transparent liquid composed of 32.5% high-purity urea and 67.5% deionized water, with a slight ammonia smell. If it splashes, the water evaporates and crystals form. AdBlue is used in cars, trucks, buses and heavy-duty non-road use diesel engine vehicles equipped with SCR (vehicle selective catalytic reduction exhaust gas aftertreatment) system. It is a consumable that must be used in SCR technology. The harmful nitrogen oxides emitted by diesel engines are converted into harmless water vapor and nitrogen. The main components of the SCR system include catalyst, AdBlue injection device, AdBlue container and AdBlue dose controller. Almost all heavy-duty vehicle manufacturers in Europe, the United States, and Asia, including China, also equip their vehicles with selective catalytic reduction systems and AdBlue working fluids to meet the new nitrogen oxide emission standards (such as Euro 4, Euro 5) AdBlue and Under the combined effect of SCR technology, it can optimize engine performance and fuel consumption, reduce diesel consumption by up to 6%, and significantly reduce costs. The average consumption of AdBlue is 5% of general diesel consumption, which is about 1.5 liters per 100 kilometers of highway driving. AdBlue can only be used to configure the engine combination of the SCR system, because it is neither a fuel nor a fuel additive. AdBlue implements standards in compliance with ISO22241, DIN70070 and CEFIC regulations to ensure the effective operation of the SCR system. AdBlue is not harmful to the environment and is classified as a transportable liquid with the lowest risk. <br style=”margin: 0px;” /><br style=”margin: 0px;” />   At present, domestic automotive urea production is dominated by small and medium-sized private enterprises, and channel sales capabilities are lacking. The domestic automotive urea is mainly produced by enterprises such as Jiangsu Klanso, Liaoning Rundi, Jingmai Chemical, and Beijing Yili. The production capacity of each company is between 100,000 to 300,000 tons per year. Among them, Jiangsu Klanzol and Liaoning Rundi have an annual production capacity of 300,000 tons, and have a series of modifier patents for the problem of low-temperature solidification of urea for vehicles. Jiangsu Klanzo has exported the urea solution for Klanzo vehicles to Russia, Eastern Europe and South America. But for the current small private enterprises, the inability to master the core sales channels is the fundamental weakness of their development. <br style=”margin: 0px;” />&nbsp;Guangdong Chuanghongyu urea energy-saving products came into being. For details, please contact 136 8021 1314&nbsp;</span></p>&lt;div class=”content” style=” margin: 0px;”>&lt;/div>

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