The parts of the vacuum brazing furnace need cleaning steps

The parts of the vacuum brazing furnace need cleaning steps

Vacuum brazing furnace need cleaning components in (1) first trough soaking in the preheating, again in ultrasonic cleaning tank (2) cleaning, use of ultrasonic cavitation effect to accelerate the pollutants dissolved and dissection, then rinse in cold rinse tank (3) by ultrasound, rinse off residual dirt, and make the workpiece cooling, the bigger the temperature difference between workpiece and solvent vapor is more conducive to the condensation, vapor phase cleaning effect is better. Finally in the solvent vapor layer (bath wash tank) RGL, rinse hot solvent vapors generated encounter cold condensation, solvent vapor into liquid, wetting, dissolve the contaminants on the surface of the workpiece, and like rain drops, and take away pollutants.
When the workpiece temperature of solvent vapor temperature, condensation, no longer no longer drops on the surface of the parts, said end of vapor phase cleaning. Finally, the workpiece is put forward to leave vapor layer to the frozen area, artifacts slightly stay which is completely dry. Because the steam is clean, clean process without secondary pollution, so it is a completely clean cleaning process, can achieve very high cleanliness.

Vacuum furnace using the matters needing attention in the process

Vacuum furnace using the matters needing attention in the process

Vacuum furnace started large-scale application in the industry. After more than 80 years of development, vacuum furnace technology mature. So-called vacuum furnace, just as its name implies is to achieve a vacuum inside the furnace, mainly for metal, ceramic, parts of annealing, quenching, etc. Improve the performance of metal, clean surface and vacuum furnace in the whole work, won'tproduce any pollution, therefore belongs to the green environmental protection industrial furnace.
With all industrial furnace, vacuum furnace needs to be treated with oven before use. Vacuum furnace and vacuum leak detection at the same time, to ensure the normal work, stable vacuum furnace and vacuum environment. Because of the special performance, vacuum furnace in the process of daily use, there are still some places worthy of attention.
First used in vacuum furnace maintenance, the vacuum furnace maintenance workers are recorded and backup. The use of vacuum furnace, repair date, the cause of the problem, recorded in the workload. In general, vacuum furnace components in the use of 2 to 3 years, began to need replacing. Vacuum furnace, especially in the spring and autumn are prone to failure, therefore, during the spring and autumn in to strengthen the maintenance of vacuum furnace. Vacuum furnace in when not in use again after using for a long time, must carry on the vacuum leak detection.
The beginning of the vacuum furnace put into use after maintenance, to increase the frequency of inspection, from the furnace temperature to the actual temperature in the furnace in the table a good statistics. Check with abnormal data in time.

Vacuum brazing furnace main use

Vacuum brazing furnace main use

Vacuum brazing furnace, it is a kind of used for metal brazing and bright heat treatment equipment. Suitable for mass production of small and medium-sized stainless steel parts (tableware, cutting tools, hardware, etc.), such as martensite stainless steel bright quenching, tempering, austenitic stainless steel bright annealing.
Main use: vacuum brazing furnace is mainly used for auto filter refrigeration parts, aerospace industry, can also be used for refrigerator, air conditioner, electronics, microwave magnetron industry and other stainless steel, carbon steel, brass, copper brazing and bright heat treatment of the parts.
Areas of application: vacuum brazing furnace is mainly used in steel industry, metallurgical industry, etc.

Vacuum brazing furnace operation procedures

Vacuum brazing furnace operation procedures

Before a furnace, vacuum furnace and ensure that water, electricity, gas in the assignments. In 380 v voltage, can not have the deviation of 10%. Pressure in 0.6 Mpa, the water pressure to the lowest (0.5 Mpa). Reach the above requirements to electricity, after operation.
Second, before feeding, check the equipment heating chamber, the heating chamber is necessary to clean, can not have sundry, dust, oil, water, etc. In view to put goods, dry cleaning, same before feeding the without watermarks, oil and other washing clean.
Third, after loading, the knob to the "door close" position. Then, a "mechanical pump" and "thick smoke valve". Of vacuum unit and the furnace smoke gas, opened the vacuum furnace with the power supply (general vacuum gauge power to launch with total power supply).
Fourth, when the vacuum degree higher than 1000 pa, vacuum gauge monitoring "J2" light. This time, can open "roots pump. Conditions such as, "roots pump" will not open, click on the button no response.

Vacuum brazing furnace method has the following several kinds of classification methods

Vacuum brazing furnace method has the following several kinds of classification methods

Selected for the quality of the vacuum brazing furnace and the brazing method and brazing material (solder, solder, etc.) and vacuum brazing furnace process parameters and so on. According to the different characteristics and standards, vacuum brazing furnace method has the following several kinds of classification methods.
(1) according to the adopted by the melting point of solder Can be divided into soft soldering and brazing, solder melting point is lower than 450 ℃ when called soft soldering, higher than 450 ℃ when called brazing.
(2) according to the brazing temperature Can be divided into high temperature soldering, brazing temperature and low temperature brazing, the division of temperature is relative to the parent metal melting point. For steel, for example, the heating temperature higher than 800 ℃, called high temperature brazing, called between 550 ~ 800 ℃ in the brazing temperature, the heating temperature is below 550 ℃ is called low temperature brazing; But for aluminum alloy, the heating temperature higher than 450 ℃, called high temperature brazing, called between 300 ~ 450 ℃ in the brazing temperature, the heating temperature is below 300 ℃ is called low temperature brazing.
(3) according to the different heat source and heating method can be divided into flame brazing, furnace brazing resistance welding, induction brazing and soldering, dip soldering, brazing, soldering iron and ultrasonic soldering, etc.
(4) according to the way of removal of the parent metal surface oxidation film can be divided into solder brazing, soldering flux soldering, the flux brazing, gas brazing and vacuum brazing, etc.
5. According to the joint formation characteristics Can be divided into capillary brazing and the capillary brazing. Liquid solder on capillary action fill in brazing seam is referred to as the capillary brazing; Capillary action in a vacuum brazing furnace form does not play a major role in the process is called the capillary brazing. Contact reaction brazing and diffusion brazing is the most typical of capillary brazing process.
6. According to the connection of different material or filler metals Can be divided into aluminum soldering, brazing of stainless steel, titanium alloy brazing, high temperature alloy soldering, brazing ceramics, composite brazing copper and silver brazing, soldering, etc.

The realization of vacuum brazing furnace automation

The realization of vacuum brazing furnace automation

Vacuum brazing furnace spray subject to the circular structure, surface passivation treatment, which ensure the beautiful appearance, also make soldering flux recovery effect is better, which can effectively prevent soldering flux, in the case of spray flux indoor accumulation, cleaning is also very convenient. Circular structure USES the real high pressure fan, pressure can reach 280 mbar, cooperate with special wind mouth, the wind speed can reach 50-200 - m/s, which can effectively remove redundant solder surface residues. Vacuum brazing furnace of a high degree of automation, below we come to the realization of the vacuum brazing furnace automation:
1, vacuum brazing furnace spray mixing system contains a lot of humanized design, solder recycling barrel equipped with filtering impurities, can filter most of the iron xu. Barrel designed deep barrel structure, which can effectively prevent solder overflow by stirring, and affect beautiful. Upper barrel equipped with omron level control, but the lack of liquid alarm.
2, the structure of the brazing furnace using fiber (cotton) around, verified by long-term considerations, insulation performance is better, can save heating time 2 to 3 hours, managing electric energy 10-20% while working for a long time, its main performance in response speed, low heat storage and heat preservation performance is good, had no effect on inflation, etc.
3, main part furnace brazing furnace, furnace is made of a 12 m in forming, namely only two side 2 weld, folding strengthen V groove at the bottom of the two.
4, slag removal chamber equipped with nitrogen gas preheating system, because there are high temperature slag removal chamber, in 500-600 ℃, when not being used, the high temperature also need emitted, resulting in energy loss. Now through slag removal chamber, internal installation scattered tropical, nitrogen cycle special process structures, such as nitrogen can be preheated to 350-400 ℃, and indirectly reduce the brazing furnace to nitrogen loss to the heat and power consumption.
5, for the energy-saving design of nitrogen, nitrogen losses mainly in the feed port and discharging port, how to ensure that the nitrogen loss is the key to save the nitrogen. Regular design can make the nitrogen from metal curtain on both sides of the overflow, metal curtain roll after using for a long time will appear, cannot achieve the desired effect. Now my company through from the top insert metal curtain, and high temperature polyester cloth, make furnace at two sides with the metal curtain connecting more closely, metal curtain after using for a long time will appear curly, but we have high temperature polyester cloth, outer spillover will still blocked the nitrogen.
6, fully automatic electric control system, two undisturbed switching procedures manual and automatic mode, can accurate records of each area of temperature curve, can copy computer analysis with EXCEL at the same time. The procedural control of the brazing furnace, can be very convenient setting the heating time, needed to make a contribution to protect the furnace. In view of the different temperature requirements of different products, with a key switch technology products, and other functions. Touch screen for each line, motor, temperature control, frequency converter fault for real-time monitoring, timely detection alarm in time, and in the form of Chinese display and storage.
7, remote control function, in the case of equipped with cable, can use the computer, mobile phones connected to the touch screen in real time, can see or remote control, also can be used as a remote maintenance. Brazing furnace main parts can also be video view (optional).

The reliability of the vacuum brazing furnace

The reliability of the vacuum brazing furnace

Vacuum brazing furnace according to maintenance schedule should be regularly to listen to correction and cleaning tape type furnace temperature recorder, check the workpiece, thermocouple and vacuum degree. By the wear and car dust between the electromechanical device, may count is not correct, cause the brazing operation. Mass production and repeat a user for the workpiece temperature of the thermal cycle of control, can be controlled by electric furnace thermocouple, the workpiece temperature measurement is required, clear electric thermocouple and the brazing temperature can be the difference between the actual temperature.
If all other conditions, including the amount and type of parts are the same, using electric thermocouple temperature on behalf of the workpiece temperature usually is practical. But the data reliability depends on daily on a regular basis to detect temperature and still need to confirm for a vacuum brazing furnace temperature is. Continuous consistent.