1 The traditional electric contact heating machine has a problem that the temperature of the heating end is not uniform.
The heating temperature cannot be accurately controlled.
The transformer current regulation capability is poor.
The failure rate is relatively high.
2 The structure and characteristics of the new electric contact heating machine The new electric contact heating machine is an electromechanical product. It uses the computer to control the pneumatic integrated block 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.
Applying the computer to control the pressure temperature and current acting on the workpiece to solve the uneven heating temperature, find 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 at a speed of 150 times and communicated with the computer, 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, and achieves a uniform heating temperature. The feeder will send out the pieces.
An electric contact heating device is a heating method in which a current is directly applied to a workpiece and heat is generated by 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 secondary coil, and multiple grades are divided. In order to extend the service life, only the grade insulation and composite epoxy resin sealing are used, and the working temperature can reach 180. Not only that, the machine also has a temperature protection sensor, which generates an alarm when the working temperature of the transformer exceeds the set safety value. The signal improves the safety and reliability of the heater.
Because the contact heating machine is heated, only the two ends of the workpiece are in contact with the electrode, and the piece is not blocked by any object, which provides favorable conditions for real-time detection. Infrared photoelectric temperature measurement system, according to the user's different heating requirements, equipped with temperature measurement system of different temperature segments, the maximum heating temperature and heating speed can be set according to needs, the highest heating temperature can be up to 12001. Infrared thermometer in real time Detect force voltage and current to ensure heating quality. It can also be equipped with corresponding software to heat the workpiece and draw the heating temperature curve record into a unique and incomparable thermal method.
Due to the need of standard parts production, the heating process should realize automatic feeding and automatic discharging. The machine is designed according to the small button of the heating workpiece, and two types of robots are designed, which are divided into one arm and two arms. In general, the workpiece is fed by a single-arm robot, and the 150500 is equipped with a two-armed robot. All the robots use a pneumatic damping system for precise positioning. When the workpiece is heated, the clamping electrode is automatically released, and a set of feeders sends the heated red material to the next process. Applying this set of dynamic manipulators to implement the automation of the heating process, the entire heating process can be operated only by humans.
Heating machine temperature automatic protection system The new electric contact heating machine is equipped with a temperature sensor and a water-cooling smashing system for the transformer and the electrode holder, and is equipped with a temperature report. When the system temperature exceeds the allowable range, the alarm device is automatically activated and stopped. In this way, the safety of the equipment is greatly improved, and the failure rate is also reduced. The operation of the machine is simple, the failure rate is low, and the maintenance of the technician is not required, and the technical requirements of the operator are low, and ordinary workers can adapt to the production.
3 The use of new electric contact heating machines has been sold to multiple units across the country. Received satisfactory results and received favorable comments from users. Its main advantages are 1 power consumption, more than the same ability of other heating type 5 energy saving 3040. Some large production households, the annual electricity saving costs, it is enough to recover equipment investment.
The operation is simple, the use is convenient, the failure rate is low, and the production can be continuous 24 times.
The heating speed is fast, the oxidative decarburization is less, and there is no end overheating, which improves the inherent quality of the product.
It can be used in a wide range of applications and can be designed into different special heating machines according to requirements. It can be used not only for the heating of product forming, but also for metal heat treatment processes such as bonfire tempering and normalizing.
Rapid heating facilitates grain refinement and ultra-fineness of the metal and increases the strength of the metal material.
No smoke and medium frequency electromagnetic pollution is conducive to environmental protection.
Screw machining and screw machine products with metal materials are all acceptable finished. The primary hardware materials of screw machined parts can be finished including copper, iron, aluminum and stainless steel. As a screw machined parts manufacturer, we specialize in processing long screw with hexagon sockets, precise and slender axle accessories. The best quality and high precision screw machining parts can be provided you the most competition price.
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