Year1
- 功率：
- 200
The early traditional technology of pick cemented carbide brazing used oxygen and acetylene flame heating. The characteristics of this process are that it is simple and easy to implement, but the brazing quality is poor, and it is prone to uneven heating, poor weld filling, poor product consistency, etc. Therefore, most companies basically stopped using it in the early 1990s in our country. At the same time, the flame heating method is replaced by the commonly used high-frequency or ultrasonic induction power heating technology. Compared with the flame heating method, this increases equipment investment, but the brazing quality is significantly improved and the welding cost is reduced. However, due to the inherent characteristic of high frequency or super audio frequency is the skin effect, the heating temperature is concentrated on the surface of the workpiece. This method will cause problems such as shallow heating penetration depth, easy overburning of the surface, and low quality of alloy bottom welding. At the same time, high frequency Equipment maintenance requires a lot of equipment, component costs are high, and procurement is difficult. With the continuous development of my country's power electronics technology and entering the late 1990s, the development and application of medium-frequency power supply induction heating technology has solved the above series of problems, which has significantly brought the quality of cemented carbide brazing to a new level.
Characteristics of the intermediate frequency furnace heated pick welding production line
_ Comparing integrated technology with non-integrated technology
First of all, the welding quality has been greatly improved, and the heat treatment technical indicators meet the requirements of working conditions. From the perspective of technology It eliminates the defects inherent in traditional processes and ensures that various technical indicators of the brazing quality of pick products in industrial production are greatly improved. Taking shear strength as an example, according to the national cutting pick standards, the qualified index for shear strength of brazed joints is 3, and the index for high-quality products is 3. Generally speaking, if the process technology is well controlled, it can reach the quality product index but not the high-quality product index. After adopting integrated technology, the shear strength of mass-produced products can generally reach the index of high-quality products, and many of them greatly exceed it. It is not uncommon to reach the above level. The imported products are generally stable at around the left and right, and some of the best ones even exceed it.
Second, productivity increases and production costs decrease. Because the integrated technology is used to shorten two heatings to one heating, the two processes of brazing heat treatment are the least energy-saving. The time consumed by the two processes of each product is greatly shortened. At the same time, there is no low-temperature salt caused by the mixing of high and low-temperature salts. The possibility of failure, low-temperature salt consumption decreased year-on-year.
Third, the working environment has been improved and environmental pollution has been significantly reduced. Due to the elimination of high-temperature salt furnaces, flue gas pollution in the working environment is eliminated, and low-temperature salt waste emissions are reduced by more than 10%.
Fourth, it facilitates automated production, greatly reducing human factors that affect quality in the production process, resulting in good product consistency and stable quality.
Fifth, it facilitates production planning and scheduling, and responds quickly to market orders. Compared with general production technology, after adopting integrated technology, the batch response time can be reduced from days to hours. It has the same adaptability and production efficiency for large batches of the same variety and small batches of different varieties. Various changes can be made within hours from the production order.
Sixth, the overall matching of the equipment is good, the amount of daily maintenance is small, and the investment recovery is fast. Since integration technology pays more attention to operability at the beginning of research and development, so as far as current integration technology is concerned, whether it is the selection of intermediate frequency power supply frequency, power size, special heating equipment, transmission equipment, isothermal quenching tank, equipment supplier These are the results of optimized design and merit selection, as well as the results of continuous improvement, adjustment and final maturity in practical applications. Therefore, the hardware of this technology, whether it is as large as medium frequency power supply, special induction equipment, or as small as pick mounting bases, hooks, etc., are connected and matched with each other. The equipment technology is perfect, the operation is smooth, and the maintenance is minimal. Because it saves direct production costs, according to calculations by enterprises that have adopted this technology compared with those that have not adopted it, the cost savings in the production of 10,000 products can generally reach the amount of technical equipment investment.
In short, it can be seen from the above analysis that the integrated technology of cemented carbide brazing and heat treatment is a relatively mature new technology in my country's current pick production industry. It combines the cemented carbide brazing, The two processes of heat treatment are combined into one, which effectively utilizes the heat energy in the cemented carbide brazing heating process, improves production efficiency, reduces production costs, alleviates environmental pollution, greatly improves product quality, and solves long-term problems. It is a key technical problem in the production of picks in my country. This technology has good promotion and application value.
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