The development history of connector terminal products

The advantages of the copper terminal after the pouring process are that the contact resistance becomes smaller, the joint is resistant to oxidation and corrosion, and the mechanical strength of the joint increases, so as to avoid the failure of the joint heating and burning. The investigation found that about the joints in the distribution network are realized through copper terminals, but only the copper terminals use tin filling devices. Tin filling is the most effective process for reducing the resistance of copper terminals between distribution lines and distribution equipment.

The traditional tin pouring process requires two people to cooperate in the operation, one person is responsible for fixing and rotating the wire, and the other person is responsible for operating the soldering iron and solder wire, and the metal vapor generated during the melting solder process will cause damage to the operator's lungs, and masks need to be worn. By recording the operation process time, it can be seen that the larger the size of the copper terminal, the longer the time required, so the tin-filled process is used for all the large number of terminals at the power outage maintenance site, which is not allowed in time.

Figure 1 shows the block diagram of the circuit composition of the intermediate frequency induction heating power supply, which is the core of the induction heating equipment. It is mainly composed of the following parts: line filtering, three-phase rectifier filtering circuit, chopper circuit, bridge inverter circuit, resonance circuit, control drive protection circuit.

Among them, the chopper circuit in the imaginary frame is not a necessary functional unit of the intermediate frequency induction heating power supply, and its application is usually to form a DC voltage regulation function with a three-phase uncontrolled rectifier to adjust the DC bus voltage of the inverter bridge of the induction heating power supply to achieve the purpose of regulating the power. When the input power supply of the induction heating power supply adopts the three-phase bridge full-control thyristor rectifier circuit to adjust the DC voltage and regulate the power on the inverter side, there is usually no need for a chopper between the rectifier and the inverter.

After the insulated wire has been stripped and twisted, it should be immersed in tin in a short time. If the time is too long, the oxide layer will appear, resulting in poor tin leaching. If the copper nose is pressed, do not soak in tin first.

In the rainy season, the time from stripping to tin dipping should be shortened as much as possible. The core should not touch the end of the insulating layer when immersion in tin, the immersion time is generally 5 10s, and the immersion temperature is between 232 270. When dipping bare wires, copper strips, rectangular rounded copper busbars, etc., it is necessary to use knives, sandpaper or special equipment to eliminate the oxide layer and dirt on the end face, and then dip the flux into tin.

The resistance of the conductor will heat up the conductor under the action of the current, and the higher the current, the higher the heat, and the role of the tinning process is to reduce the heat generation. When using such a wire head press-fitting line nose, the tin film will melt under the action of high pressure of hydraulic crimping pliers, and fully fill the gap between the wire head and the line nose, at the same time, the melted tin will infiltrate the inner wall of the nose, these two effects make the contact resistance of the press-fitting wire head the smallest, the heat is the smallest, it is not easy to cause accidents, and at the same time, it prolongs the service life of electrical appliances (such as air opening, contactors, etc.).

The life of the terminal industry lies in the rapid development of the connector industry, and the development of the terminal industry mainly relies on the economic development of a country and region, the importance of the first and its own necessary terminal potential resource base. The development of the terminal industry in different regions of its development is different, Europe, North America and some parts of East Asia developed earlier, they are mainly in the second industrial revolution to get the transition, especially the United States and Japan, in the second industrial revolution and the third industrial revolution in the leap and bound, to promote the leap of the connector industry. For East Asia, Africa and parts of South America, the development of the connector industry is relatively slow, mainly because these regions have not completed the transformation of their own industries in the frenzy of the industrial revolution.

With the advent of the 21st century, the industries of various countries have also entered a period of rapid development, especially in Asia, with strong development tension. The connector industry is currently beginning to enter a mature period in the world, but manufacturers in the terminal industry must grasp the operation of the life of the terminal industry if they want to obtain huge benefits in the wave of connectors.

Terminal line grip crack industry only continuous innovation, continuous research and development and update sales, the major terminal manufacturers can really vitality in the connector market, Shanghai Lianjie was founded in the past ten years to adhere to innovation and vigorously carry out research and development work, open up greater development space, worthy of many domestic manufacturers to learn.

Lianjie terminal block - PCB plug-in terminal block LC series, PCB fixed terminal block LG series, PCB fence terminal block LW series, PCB spring terminal block LS series, and frame terminal block LUK, LSAK series, etc.

With the increasingly fierce competition in the terminal block market, quickly and effectively grasping the market development has become the key to the success of enterprises and decision-makers. Market segmentation is a scientific and systematic work, which directly affects the planning of enterprise development strategy, the design of product marketing plan, the formulation of the company's investment policy and the determination of future development direction. Market analysis is not simply from a certain level of market evaluation, in order to get practical value, instructive conclusions, it is necessary to conduct a comprehensive and detailed analysis of the market from a professional point of view.

In this way, we can always maintain a clear development idea, not be lost by complicated information, and be invincible in the increasingly fierce market competition. In response to the needs of enterprises, we have conducted in-depth research on the cable terminal market and written this report to help enterprises make decisions.

The report describes in detail the market environment of terminal products, the current situation of market development (including technology, supply and demand, raw materials), market development pre-focus air test (market supply and demand and market development trends in the next five years), and on the basis of analyzing market competition, the industry investment prospects and investment value are analyzed (including investment risks, investment environment, investment barriers, investment returns, etc.), and put forward our suggestions for investment in cable terminal products.

The report is based on research data from the National Bureau of Statistics, the National Customs, industry associations and enterprises. In order to ensure that the content of the report is detailed, accurate and reliable, and the data are comparable, the report has carried out the necessary screening and grouping of statistical data, and closely combines macro and micro data. The report adopts a combination of quantitative and qualitative analysis methods based on quantitative analysis (including the application of economic statistical models, etc.), and deeply excavates the internal laws and potential information contained in the data.

At the same time, statistical charts and other forms are used to clearly and intuitively display the analysis results, which ensures the systematization and integrity of the report content from multiple directions and angles. It provides a decision-making basis for the development of enterprises and investment in cable terminal products. At the same time, it also increases the objectivity and reliability of the report's research conclusions.