Parts and products and quality 39 electric contact rapid heating machine in the production of standard parts Beijing Liang Anxin Electromechanical Technology Development Center Wang Jialiang in the production of metal standard parts, can not be separated from the heating process. The production process is different and the heating requirements are different. For example, large and medium-sized nuts have large plastic deformation, high heating temperature and good heat permeability. In the production of bolts, there are local heating requirements for the steaming process, while large and medium springs require integral heating of long raw materials. The common features of these standard parts are large batch size, high degree of automation, no oxidative decarburization and good mechanical properties. The electric contact heating machine has the advantages of high heating speed, low power consumption, simple structure and no pollution, and is particularly suitable for the production of standard parts. However, due to the uneven temperature at the heating end, it is prone to overheating and is not widely used in production. In response to this situation, our center designed a new type of electric contact heating machine, which not only overcomes the shortcomings of the traditional electric heating machine, but also realizes mechatronics, and adds a real-time detection system to solve the problem of temperature unevenness and overheating. The degree of automation can be fully adapted to the heating needs of various standard parts, and can also be applied to the work of super-fine heat treatment of metal grains. Problems with the conventional electric contact heating machine (1) The temperature at the heating end is not uniform. (2) The heating temperature cannot be accurately controlled. (3) The transformer current regulation capability is poor. (4) The failure rate is relatively high. Structural composition and characteristics of the new electric contact heating machine The new electric contact heating machine is an electromechanical integration product. It uses computer controlled pneumatic manifold, automatic feeding and feeding, temperature detection, thyristor trigger circuit and water cooling and overheat protection system, which is a fully automatic heating closed-loop control system. The computer controls the pressure, temperature and current acting on the workpiece to solve the problem of uneven heating temperature, and finds a breakthrough at the contact surface between the workpiece and the electrode. Through the photoelectric automatic detection system, the temperature of the end and the middle is continuously detected and communicated with the computer at a speed of 150 times/s, and then the pneumatic pressure of the electrodes at both ends of the workpiece is controlled by a computer to control the uniformity of the heating temperature of the workpiece. When the temperature difference exceeds the specified value, the pressure applied to the workpiece by the electrode will be automatically adjusted. Through the small plastic deformation of the contact point, the actual contact area will increase rapidly, the contact resistance will decrease, and the temperature of the end will increase rapidly. Down, the temperature inside the workpiece tends to balance. As the overall temperature increases, the strength of the workpiece will decrease. At this time, the pressure acting on both ends will be automatically lowered, so that the elongated workpiece will not be unstable due to the strength drop. While adjusting the pressure, the computer constantly adjusts the parameters of the thyristor trigger circuit, so that the current and voltage supplied by the transformer are also constantly adjusted, so that it maintains a dynamic equilibrium state at all times, achieving the purpose of uniform heating temperature. . When the overall temperature of the workpiece is heated to the set value, the electrode is released and the workpiece is fed out through the feeder. Transformer Process Retrofitting An electric contact heater is a heating method that uses a current to directly act on a workpiece and generate heat using its own resistance. In order to shorten the heating time and increase the productivity, a step-down method is adopted to obtain a low voltage and a large current. In order to improve the service life of the transformer, reduce the failure rate and adapt to the requirements of heating various cross-section and length workpieces, a high-power water-cooled disc transformer is used, and multiple taps are arranged in the primary coil, and multiple grades are divided. In order to extend the service life, H-class insulation and composite epoxy resin sealing are used, and the working temperature can reach 180 °C. Not only that, the machine also has a temperature protection sensor. When the working temperature of the transformer exceeds the set safety value, an alarm signal is generated, which improves the safety and reliability of the heating machine. Pull Down/Out Brass Kitchen Faucet DQOK is a professional manufacturer and supplier of Pull Down Brass Kitchen Faucet.Our company mainly produces Brass bathroom Pull Down Kitchen Faucet with high cost performance and high quality. Our company hasve casting workshop for Brass and Our technicians can design any style you want.We also provide OEM products and services for you. Pull Out Brass Kitchen Faucet,Pull Down Brass Kitchen Faucet,Sink Kitchen Faucet,Single Handle Kitchen Faucet Heshan Dingquan Sanitary Ware Industry Co., Ltd , https://www.dqoksanitary.com