Month: January 2022
Why the United States is desperately suppressing Huawei: The US Attorney General’s speech tells the reason
Why is the United States doing all it can to suppress Huawei?
On February 6, 2020, U.S. Attorney General William Barr attended the “China Initiative Meeting” at the invitation of the Washington think tank “Center for Strategic & International Studies” (CSIS) Conference) and gave a keynote speech.
In the speech, William Barr talked about the unprecedented challenge posed by China’s technological offensive to the United States and Huawei’s leadership in 5G.
He said the United States has been a world leader in innovative technology since the 19th century. It is America’s technological prowess that keeps us prosperous and secure. Our standards of living, our expanding economic opportunities for young people and future generations, and our national security all depend on our continued technological leadership.
William Barr believes that 5G technology is at the center of the emerging technological and industrial world. Essentially, communication networks are no longer just for communication. It is evolving into the next-generation internet, the industrial internet, and the central nervous system of the next-generation industrial systems that will depend on that infrastructure.
China has taken the lead in 5G, capturing 40% of the global infrastructure market. And, for the first time ever, the United States is not leading the next era of technology.
It is estimated that the Industrial Internet, powered by 5G, will generate an economic opportunity of up to $23 trillion by 2025. If China comes out on top in 5G, it will dominate the opportunities presented by a series of intertwined emerging technologies that rely on 5G platforms.
Currently, Huawei has become a leading supplier on every continent except North America. There are no equipment suppliers in the US. China’s main competitors are Finnish company Nokia (17%) and Swedish company Ericsson (14%).
China is using various forces to expand its global 5G market share. The total market size for 5G infrastructure is estimated at $76 billion. China is offering more than $100 billion in incentives to help customers buy its equipment.
Additionally, 5G is based on a range of technologies, including semiconductors, optical fibers, rare earths and materials. China has started to localize all of these elements and is no longer dependent on foreign suppliers.
William Barr said that in the next five years, the global territory and application dominance of 5G will be determined. The question is, within this window, can the United States and our allies compete enough with Huawei to retain and capture enough market share to maintain a competitive position long enough and strong enough to avoid ceding dominance to China. Time is short, and we and our allies must act quickly.
Obviously, Huawei is also ready. “We have nowhere to go except victory,” Huawei said.
The process of through-hardening steels and then finish machining them is time consuming and expensive; to avoid this, prehardened or pretoughened steels have been developed,the effect the steel is heat-treated in a similar way to normal through-hardened steels but it is tempered back to a lower hardness.
For example, tempering at a temperature of 200 °C gives a hardness of approx* 50 Rc, while tempering at 600 °C gives a hardness of around 30 Rc. The big advantage is that while steel at 50 Rc cannot be milled or turned, material at 30 Rc can be. This means that all machining can be carried our without any need for further heat treatment. A commonly used version of pretoughened steel is A/Sf P20. The main reason for using pretoughened steel is that it does not have to undergo subsequent heat treatment hence avoiding the risk of distortion from a full hardening process.
Clearly, however, the through-hardened AISI H13 at 50 Rc is better suited to long-running tools than the pretoughened AISI PZ0 at 30 Rc .The lower the hardness of the steel,the quicker it will wear and suffer damage.P20 steel can, however, be subsequently treated with implantation to increase surface hardness by up to 15%. Pretoughened steels would normally be chosen where the risk of distortion on delicately forms is unacceptable- It would also be selected for medium-run jobs where the cost does not jusrify full hardening and finishing operations.
Carburising or Case Hardening
This process is a carry-over from the days when suitable alloy steels were unavailable. It consists of heating low-carbon steel (mild steel) in a carbon-rich gas, in a liquid (cyanide salt bath) or in a container filled with a form of carbon material. The carbon ingresses into the surface of the steel, where a hard structure is formed giving a component with a hard surface and a tough, more flexible interior. Modern hardening techniques have largely superseded carburising but there is a trend towards the use of this technique in recent years where the advantages of the hard skin and soft core are attractive.
Carburising may be used to advantage where any deflection of components is taking place such that through-hardened parts may break much earlier, A disadvantage of carburising is that it is quite prone to distort parts, so that subsequent machining is required to combat this effect, Carburised parts are not suitable for heavy direct loading applications where they will fail. For such loading conditions, the through-hardened alloy steels should be used. Carburiying is used frequently for surface hardening of cavities and puncht’s for very large mold tools where through-hardening would not be possible- This proccsy is also used fur hardening cavities that have been hohbed.
2011-02-25 23:39How to buy Cnc Router Machine
Five steps to choose the Best CNC router,
First, know your routing needs. While different routers may generally do the same thing, some models may suit your purposes better. If you’re working with lightweight material, you may want to look toward CNC routers that have their own hold-down or vacuum systems in place. But for heavy weighted objects, you can save money and develop your own hold-down system.
Second, determine your size requirements and limitations. Measure the area where you’ll be using your CNC router. A basic 3-axis router kit will come with a standard four-inch by eight-inch base. For use in a manufacturing plant or factory, the faster 4-axis and 5-axis routers are on a much larger scale.
Tree, set the price you’re willing to pay. Routers can be an expensive addition to your workshop. The cost for a new low-end CNC router will start at $5,000. For the highest end model of CNC routers, you can expect to pay $150,000 or more. Knowing your needs and requirements from Steps 1 and 2, budget for the purchase of your CNC router and check into financing options. Consider purchasing a refurbished or used CNC router, if a new one exceeds your budget.
Four, View CNC routers and compare vendors. Browse through Internet sites such as Shop Bot and Ez-Router to see in-stock options. Through their websites, you can compare the training and support options, as well as the warranties they offer. Contact your local machine shops and ask for recommendations of their vendors before you make the final decision as to where to purchase your CNC router.
Five, Find a reputable company to purchase your CNC router. Negotiate into your final purchase price delivery, installation and software training. Also negotiate a support contract with the company to service your router, and know what the warranty covers under the purchase agreement and support contract
On June 22, local time in the United States, Microsoft’s market value exceeded $2 trillion; among them, Microsoft’s stock price touched a maximum of $265.79 during the session, and the closing price of the day closed at $265.51.
In the global market capitalization ranking, the companies behind Apple and Microsoft are Saudi Aramco, Amazon, and Alphabet, the parent company of Google. Their market capitalizations are about $1.9 trillion, $1.8 trillion, and $1.6 trillion, respectively. Among them, Saudi Aramco briefly crossed the threshold of US$2 trillion in December 2019, and its current market value is about US$1.9 trillion. Saudi Aramco has become one of the world’s leaders in oil production and reserves.
In 2019, Microsoft just exceeded 1 trillion US dollars. In just two years, Microsoft became the second company with a market value of more than 2 trillion US dollars after Apple. Affected by the epidemic, people’s demand for remote work has promoted the development of cloud computing platforms. As the world’s largest software company, Microsoft has brought a lot of revenue to Microsoft in addition to its best-selling operating system and Microsoft Office series software. The layout in cloud computing and AI has also brought new vitality to Microsoft.
New business success helps Microsoft break through 2 trillion
Microsoft’s rapid growth is inseparable from the success of its latest business.
With the advent of the internet and mobile internet era, Microsoft once fell behind newer rivals like Google and more nimble rivals like Apple when it comes to social media and internet search.
Things have changed at Microsoft since Satya Nadella took the helm.
In 2014, Satya Nadella became the third CEO of Microsoft, making technology giants like Microsoft vigorous again and quickly growing into the world’s most growing technology company, Satya Nadella Pull successfully reshaped Microsoft into one of the largest resellers of cloud computing software in the world.
Before Satya Nadella took office, Microsoft was in a period of declining performance, dubbed by the media as a “fading empire.” After he took office, Satya Nadella was ordered to focus on the frontier fields such as cloud computing, mobile software and artificial intelligence. In addition, the new algorithm, the launch of Microsoft Azure cloud services, etc., have brought Microsoft back to life.
In 2020, the intelligent cloud business accounted for 33.8% of Microsoft’s 2020 revenue, becoming the largest of the three major business segments for the first time, up from 31% in 2019.
On June 16 this year, Microsoft’s board of directors unanimously approved the current CEO Satya Nadella as the new chairman, taking charge of Microsoft, and holding two positions like this. Satya Nadella is the first after Bill Gates. two people.
Traditional software and hardware are still strong
Microsoft is an attractive name in tech, especially when it comes to software and hardware that consumers reach.
The Microsoft Office series software is still one of the most popular office suites in the world, and the Windows system still firmly occupies the first place in the global system market share. According to the latest media news, Microsoft will hold a new generation of operating system on the 25th, Beijing time. At the Windows 11 conference, Windows 11 will also usher in a new “look”.
In addition, in addition to the traditional Windows series of software and hardware, Microsoft has also invested heavily in the game industry and successfully built the Xbox platform.
Since Microsoft released the Xbox in 2001, in the field of game hardware, Microsoft’s Xbox has formed a tripartite situation with Sony PS and Nintendo NS.
Xbox is a home video game console developed by Microsoft. The first one was released in 2001. The second-generation Xbox 360, the third-generation Xbox One, and the fourth-generation Xbox Series X (the new Xbox) were released in 2005. , 2013, 2019 releases.
With Microsoft’s blessing in hardware and software, the game consoles released by Microsoft have a number of technological advancements. Take the fourth-generation Xbox Series X as an example, it won the 2020 Innovation Design Award. The official reason for the award is that it is equipped with AMD’s latest Zen 2 architecture CPU and RDNA 2 architecture GPU, and the floating point number reaches 12T. In addition, it is equipped with a 1TB PCIe 4.0 SSD, which can expand the capacity through a dedicated external memory card.
At the E3 exhibition that just passed this year, Microsoft’s performance was also very good.
The “Halo: Infinite” launched by Microsoft and B agency is considered by the audience to be the most anticipated game, and there are new racing games such as “Forza Motorsport: Horizon 5”. expectations.
According to information released by Microsoft, in the second fiscal quarter ended December 31, 2020, compared with the same period of the previous fiscal year, Microsoft’s revenue was $43.1 billion, an increase of 17%. In the second quarter, Xbox hardware revenue grew 86%, driven by the launch of the Xbox Series X/S, and gaming revenue grew 51%.
ON Semiconductor’s energy-efficient solutions empower robot innovation and help upgrade industrial automation
“Industrial automation simply refers to the shift from human manufacturing to robotic manufacturing, involving various technologies such as cyber-physical systems (CPS), Internet of Things (IoT)/industrial Internet of Things (IIoT), Cloud Computing and artificial intelligence (AI). , It can realize economic growth and maximize profits, improve production efficiency, and avoid hidden dangers of manpower when performing certain tasks. ON semiconductor provides comprehensive, energy-efficient and innovative semiconductor solutions for industrial automation. Among them, the construction block diagram of the robotic semiconductor solution is shown in Figure 1.
Industrial automation simply refers to the shift from human manufacturing to robotic manufacturing, involving various technologies such as cyber-physical systems (CPS), Internet of Things (IoT)/industrial Internet of Things (IIoT), Cloud Computing and artificial intelligence (AI). , It can realize economic growth and maximize profits, improve production efficiency, and avoid hidden dangers of manpower when performing certain tasks. ON Semiconductor provides comprehensive, energy-efficient and innovative semiconductor solutions for industrial automation. Among them, the construction block diagram of the robotic semiconductor solution is shown in Figure 1.
Figure 1: Block diagram of industrial automation-robotic semiconductor solution construction
Designers can use ON Semiconductor’s brushless DC motor (BLDC) controllers to achieve BLDC motor control, such as high-performance second-generation single-motor controllers MC33035, NCV33035 and MC33033, or MC33039 for speed closed-loop control. For supporting power devices, ON Semiconductor offers the Power Trench N-channel MOSFET series, with avalanche breakdown voltage ranging from 40 V to 150 V or even higher, depending on the application.
A dedicated inverter network is used to drive the BLDC phase windings of the universal arm brake and end effector. This inverter system contains Power Trench power devices with a withstand voltage of up to 150 V. The following table lists some members of ON Semiconductor’s Trench series of discrete devices, as well as recommended three-phase gate (pre) drivers:
In order to feed transient large currents and large voltages to low-voltage microprocessors that are more sensitive to noise, digital isolators may be required; at the same time, depending on the power supply architecture, isolated driver ICs may also be required.
The functional part of the inverter and higher power application scenarios can be implemented using intelligent power modules (IPM), such as ON Semiconductor’s NFVA35065L32. This AEC-Q and AQG324 certified 50 A automotive-grade high-voltage module integrates 650V field-stop trench IGBT devices, which can withstand higher induced voltage spikes. NFVA35065L32 also integrates a wealth of protection functions such as over-current shutdown, under-voltage lockout (UVLO), over-temperature, over-temperature monitoring and fault telemetry functions, which can meet all your requirements for driving today’s three-phase BLDC motor applications, and is stable, reliable and excellent The high reliability. NFVA33065/34065L32 are respectively 650 V 30 A / 40A IPM. NFVA225 / 235 / 25012NP2TC is 1200V 25A/35A/50A IPM.
In the higher power range, ON Semiconductor has introduced 1200 V 25 A, 35 A and 50 A PIM modules, providing converter-inverter-brake (CIB) and converter-inverter (CI) Architecture; and 650V 50A PIM module, providing converter-inverter-interleaved PFC (CIP) architecture, which is ideal for industrial automation-robot applications. In the future, 1200 V and 650 V products ranging from 25 A to 200 A will be launched, including the Compact and QLP-74 series, to achieve full coverage of the power spectrum to meet various power requirements. The following table lists the TMPIM modules that ON Semiconductor has launched.
1200 V 25A
1200 V 35A
1200 V 50A
650 V 50A
For higher voltage applications, the APM17M series of smart power inverters are required, such as NXV10H250XT1 (100 V, Idmax = 250 A, 1 mΩ) and NXV10H350XT1 (100 V, Idmax = 310 A, 1 mΩ). These power inverter units can be operated in three-phase (3 APM17M) or six-phase (6 APM17M).
The package design of this series has low parasitic inductance (machine vision
One of the key elements to achieve full automation is that the machine can perceive the surrounding environment: the machine can observe and recognize nearby objects, and distinguish and discern the next action, thereby maintaining safety and avoiding conflict. ON Semiconductor is one of the leaders in industrial machine vision. It is committed to empowering machines to surpass human vision with a full range of imaging solutions and leading technologies, and to promote innovation in industrial automation.
In the solution shown in the figure below, the 1/4-inch, 1 million-pixel AR0144 CMOS image sensor adopts the best third-generation global shutter technology, which is extremely suitable for machine vision applications. The NCP163, which uses ultra-low noise and ripple, provides power to the AR0144, allowing the AR0144 to get clear images even in low light.
The NCP3170 synchronous rectifier Buck provides main power output for point-of-load (POL) power supply. The step-down regulator has an output capacity of 3.3V/3A, which can provide sufficient power for other downstream devices of ON Semiconductor. The NCP3170 also has Some key features such as thermal shutdown and output short circuit. Electronic fuses (e-Fuses) can also be used on DC BUS to suppress voltage/current surges and solve the timing problems of multiple power supplies.
Figure 2: Industrial automation-machine vision semiconductor block of robots
For low-light and distance-sensitive detection and measurement applications, use single-photon-sensitive high-performance solid-state sensors or silicon photomultiplier (SiPM)/single-photon avalanche diodes (SPAD) and Microcell arrays, and deploy LiDAR to detect light And ranging, can generate a digital 3D image of the desired target. Due to the high gain, high bandwidth and high sensitivity of the photomultiplier, more accurate images can be generated. ARRAYRDM-0116A10-DFN, a member of the R series SiPM sensor series, is suitable for 905/940 nm LiDAR applications. This 1×16 pixel array format and unique fast output, at the same time, the sensitivity of 905 nm wavelength is higher than 100 kA/W , These excellent features provide a feasible solution for factory automation scanning.
The main power supply consists of several switching regulators, converters and LDOs, which provide suitable working voltages for photomultiplier arrays, laser diodes, gallium nitride (GaN) drivers, analog front-end bias circuits, and time-to-digital converters. In order to provide -24V or -45V negative voltage to the Microcell array, you can use the NCV898031 non-synchronous (SEPIC) boost controller. The NCV898031 integrates a MOSFET driver to drive the FDMC86116LZ 100V 7.5A 103mΩ Rdson MOS. The boost rectifier part uses ultra-fast recovery Automotive grade diode SURA8120T3G (1A 150V Trr
NCV887102D1R2G automotive grade boost IC can be used to drive FDMC86116LZ MOSFET, which can provide 80 V power to the laser diode. The NCV890100MWTXG buck regulator has an internal integrated switching MOSFET, suitable for outputting 3.7 V and 5.5 V power supplies. This 2 MHz switching frequency power supply can handle input voltages up to 36 V and is suitable for small size applications. It requires 3.7 V or 5.5 Ideal for applications with V output voltage.
NCP59300 is a low noise and low ripple linear regulator with 3A current output. NCV8114ASN250T1G is a 300 mA LDO with high PSRR and low quiescent current. NCV8187AMT120TAG can provide 1.2A output. These LDOs provide power for the FPGA, NC7WZ17P6X clock buffer, NCV809RTRG voltage monitor/microprocessor, and clock oscillator in the time-to-digital converter. At the same time, these LDOs are all output from the DC-DC step-down converter of the NCV890100MWTXG controller. powered by.
Artificial intelligence (AI) voice interaction applications are becoming more and more popular, and further penetration in the industrial field. The LC823455 single chip (SoC) that can be used with the host AI system is a 32-bit high-resolution audio digital signal processing (DSP) core with multiple proprietary DSP accelerators (codecs) for audio noise reduction , Beamforming and echo cancellation. It is a multi-core architecture (2 ARM M3+1 DSP Core), which can provide powerful processing capabilities when connected with large-scale programs.
NCP2823 is a class D audio amplifier used to drive 4 Ω to 8 Ω output speakers. The power supply for this audio amplifier is NCP3170 DC-DC to provide 5 V power. Connected to the 5 V POL power supply is a series of high-noise suppression linear regulators (LDO)-NCP170. Its ultra-low quiescent current consumption is ideal for battery-powered applications. It can be realized by the RSL10 platform that supports Bluetooth 5. Interconnection between devices.
QCS-AX-D12/QCS-AX2-D12 is a dual-band dual-concurrent WiFi 6/6E chip M that supports 802.11ax/ac/n/a/g/b standards. It is the industry’s first 8-space stream that supports 8×8 And multi-user multiple input multiple output (MU-MIMO) chip. Its 8 x 8 + 4 x 4 dual-band concurrency (DBDC) and OFDMA (orthogonal frequency division multiple access) can make the best and efficient use of bandwidth. QCS-AX-D12/QCS-AX2-D12 access points support up to 10 Gbps and eight spatial streams (Eight Simultaneous Spatial Streams).
In the power supply part, the full-bridge rectifier GBPC3506 is used to rectify the AC to DC voltage, and the 3-channel interleaved CCM PFC IC FAN9673Q can provide the power supply with a high power factor of PF=1. The PFC power MOS recommends the use of 600 V30 A SuperFET III NTPF082N65S3F , 650V30A SiC diode FFSP3065A is a PFC rectifier diode. The zero current recovery characteristic of SiC diode achieves higher efficiency and better EMC characteristics and lower temperature rise.
In 500W-5KW applications, the use of full-bridge LLC and secondary synchronous rectification output or full-bridge rectification output can achieve efficiency higher than 95% while providing safety isolation. NCP(V)4390 is an LLC controller that uses adaptive dead time (to maintain the best body diode conduction time) control, and integrates a secondary synchronous rectification drive signal to achieve the best energy efficiency performance and the most simplified peripheral Device. NCP(V)4390 primary side MOS is zero voltage switching (ZVS), secondary side MOS/diode is zero current switching (ZCS) to minimize power consumption. The secondary can provide a variety of winding configurations to adapt to various required bus voltages. For example, 48 V bus voltage is used for the integrated power module of BLDC motors, and 12 V is used for image sensors, lidar systems, and multiphase converters. Smart power stage (SPS), radio board/antenna and POL power supply for voice and audio processing.
Multiphase DC-DC converter
Need to use multi-phase controller such as NCP81233, integrated MOSFET driver NCP5339, depending on the circuit needs to use e-Fuse or load switch IC to provide reverse current protection, input overvoltage clamp or overcurrent protection.
For applications with higher power requirements, the phase multiplier NCP81162 can be used. Two-phase or three-phase converters can be used to power multi-core system single-chip platforms, such as NCV81277 or NCV81275A multi-phase controllers, with MOSFET driver ICs such as NCV3025833 or NCV303150.
The 5 V DC power supply for the switching regulator is a 10 A single-phase buck converter. The converter is composed of NCV881930 control IC, driving two separate 40V78 AN channel MOSC NVMFS5C460NL. The remaining low-power power supply with an output voltage range of 0.75 V to 3.3 V is provided by the NCV6323 internal compensation regulator (integrated MOSFET and MOSFET driver).
Robot is one of the key technologies to realize industrial automation. ON Semiconductor provides comprehensive energy-efficient semiconductor solutions for robot building blocks such as motor control, machine vision, lidar, voice control, wireless connection, power supply, etc., to support and promote innovation.
For people who are exposed to machining sheet metal for the first time, most people will confuse the concepts of machining sheet metal and metal pressing process. Although the two have many similarities, they still have certain differences. In fact, between the two there is a relationship of inclusion and inclusion.
Machining sheet metal refers to the processing of sheet metal, which is the use of sheet metal to make common items in our daily life, such as chimneys, iron barrels, fuel tanks, ventilation pipes, elbows and small heads, sky circles, funnels, etc. It is mainly produced by cutting, bending, welding, riveting and other processes. During the stamping process, the sheet material is directly received in the Mold with the help of the power of conventional or special stamping equipment. Deformation force and deformation, so as to obtain a certain shape, size and function of the production technology of product parts, sheet metal, mold and equipment are the three elements of metal pressing process.
It can be seen from the above that the metal pressing process is only one of the many processes in the machining sheet metal. A clear understanding of the relationship between the two can help factory employees make fewer mistakes in the future operations. It can improve the technical level of employees in operation. Regarding the partners who have just joined the sheet metal processing industry, it is necessary to distinguish the difference between machining sheet metal and punch processing, so as to be more helpful to the development of future work.
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“Tuning fork level gauge is a level switch widely used in industrial environment, often called tuning fork level switch or tuning fork level controller, including tuning fork level switch, tuning fork level switch and other level measuring instruments. It is designed using the principle of tuning fork vibration, and uses piezoelectric devices to drive and detect the vibration of the tuning fork rod.
Tuning fork level gauge is a level switch widely used in industrial environment, often called tuning fork level switch or tuning fork level controller, including tuning fork level switch, tuning fork level switch and other level measuring instruments. It is designed using the principle of tuning fork vibration, and uses piezoelectric devices to drive and detect the vibration of the tuning fork rod. When the material is not in contact, the tuning fork vibrates freely at the resonance frequency. When the tuning fork is in contact with the material to be tested, the vibration amplitude of the tuning fork is significantly reduced, and the output signal amplitude of the piezoelectric detection device decreases accordingly, and the signal change is detected by the intelligent circuit Analyze and output a switching signal. Simply put, the tuning fork generates mechanical vibration under the excitation of the piezoelectric device, and this vibration has a certain frequency and amplitude.
In some highly corrosive medium environments, the tuning fork level gauge in the prior art is easily corroded by the medium, which changes the vibration signal received by the piezoelectric ceramic, so that the tuning fork level gauge is reliable when monitoring the level. The performance is reduced, and false alarms are prone to occur. However, there is a lack of monitoring of tuning fork rod corrosion in the prior art.
In response to this situation, the R&D engineers of Shenzhen Jiwei Automation Technology Co., Ltd. made improvements to the existing monitoring methods and systems on the basis of many tests, and proposed a new type of tuning fork level meter and its monitoring level The method and system include the following steps: the piezoelectric ceramic senses the vibration of the tuning fork rod and outputs the corresponding electrical signal, the processor collects the voltage amplitude of the electrical signal in real time, and judges whether the tuning fork rod is in contact with the material according to the voltage amplitude; at the same time monitoring The frequency change trend of the electrical signal, judge whether the tuning fork rod is in contact with the material according to the voltage amplitude, and judge whether the tuning fork rod is corroded according to the frequency change trend; in the state of not contacting the material, judge the degree of corrosion according to the frequency change value, when it is corroded When the degree is serious and affects the reliability of the equipment, a corrosion alarm is output.
Practice has proved that the multiple voltage amplitudes sampled continuously are compared with the preset voltage upper limit value, voltage lower limit value and voltage median value. According to the comparison result, it is judged whether the tuning fork stick is in contact with the material. Since the sampled voltage amplitude is multiple continuous, and through multiple comparisons with the voltage upper limit value, the voltage lower limit value and the voltage median value, even if the tuning fork level meter is momentarily impacted by an external force or electrical interference, the voltage The amplitude is instantaneously unstable, and it does not affect the processor’s judgment of the use state of the tuning fork rod, and can monitor the level more accurately and reliably.
Extend the service life of ：
Due to the long-term use and high injection speed of the die-casting mold, after a period of use, there will be more or less deposits on the core and cavity of the die-casting mold. These deposits adhere firmly to the surface of the core and cavity, and the hardness is quite high, making it difficult to remove. These deposits are combined with a small amount of die-cast metal, coolant and mold release agent impurities under high temperature and pressure. In the process of removing these deposits, we should use mechanical methods or grinding methods to remove them. During the removal process, other surfaces of the die-casting mold should not be damaged to avoid dimensional changes.
Periodic maintenance of the die-casting mold can keep the die-casting mold in a very good working condition. The maintenance of die-casting molds is very necessary, which can effectively slow down the generation time and extension speed of mold cracks and increase the service life of the mold.
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2013-07-03 10:38Enhance the competitiveness of products
In recent years, Jinan River（GANGER） CNC vigorously implement technological innovation, promote the adjustment of product structure, increasing product development efforts, focus on product upgrading and transformation, innovation and remarkable achievements, rivers CNC brand product competitiveness has improved significantly, significant economic benefits to improve and achieve the rapid development of enterprises.
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Ministry of Industry and Information Technology: “Double G and Double Promotion” work has steadily advanced, and the proportion of 4G users has declined slightly
On March 19, the Ministry of Industry and Information Technology announced the economic operation of the communications industry from January to February 2020. The scale of 4G users (1.262 billion) accounted for 79.9% of the total number of mobile phone users, a decrease of 0.2 percentage points from the end of the previous year. Among them, the number of mobile phone users has entered a stable period, and the proportion of 4G users has declined slightly.
The scale of fixed broadband access users exceeded 450 million, and the scale of gigabit fixed broadband access users continued to expand. As of the end of February, the total number of fixed Internet broadband access users of the three basic telecommunications companies reached 452 million, a net increase of 2.83 million over the end of the previous year.Among them, there are 420 million optical fiber access (FTTH/O) users, accounting for 40% of the total fixed Internet broadband access users.
92.9%. Broadband users continued to migrate to high speeds. Fixed Internet broadband access users with an access rate of 100 Mbps and above reached 384 million, accounting for 85% of the total number of users.
The work of “Double G and Dual Delivery” has been steadily advanced, and the number of fixed Internet broadband access users with an access rate of more than 1000M has reached 1.97 million
. As of the end of February, the total number of mobile phone users of the three basic telecommunications companies reached 1.58 billion, which was basically the same as the same period last year. Among them, the scale of 4G users (1.262 billion) accounted for 79.9% of the total number of mobile phone users, a decrease of 0.2 percentage points from the end of the previous year.