Removal of vacuum aluminum brazing furnace oil need to pay attention to the problem

Removal of vacuum aluminum brazing furnace oil need to pay attention to the problem

1, to 400 degrees Celsius temperature quickly, in order to reduce the diffusion brazing junction silicon, is helpful to ensure the quality of joints. As this is aluminum brazing process requirements, must do it.
2, then take a slow long natural cooling, this step is to cleanse sandstones from fouling. At this time due to the furnace with nitrogen gas, waste heat by the cycle of nitrogen} L conduction, radiation to heat was less than the adsorption with the cold components of oil pollution. The temperature of these artifacts usually only tens of degrees, in the process can increase to 200 degrees Celsius, so as to achieve its evaporation table and pollution of the day.
3, the next coarse vacuum, one party but would have vaporized oil steam out of furnace chamber, prevent again by adsorption after cooling, the other party and, in the crude oil evaporation under vacuum environment will be more thorough. Diffusion pump no need to open, because when pressure drop to 10 pa, more than 99.99% in furnace gas has been pulled out.
4, closed cooling water of furnace wall, furnace door is to reduce heat loss, is more advantageous to raise the temperature of furnace wall. However, because the diffusion pump need cooling of equipment, can't stop water cycle system.
5, and other issues
Through such processing, baffle plate and oil base on some of the heat capacity of the smaller components can be cleared away. Wall due to the heat capacity, although closed cooling water in advance, but still kept cooling water increase the heat capacity of National People's Congress, the temperature is still rising gao, clean from the effect of oil pollution is the worst. So, in the final need to j ping work cleaning furnace wall. Because the oil is accumulated for a long time, the oil will stick with dust, is can't use this method to remove dust, oil pollution has been removed, the remaining dust adhesion is not strong, can use a vacuum cleaner to clean up, or use the clean compressed air to blow away. Can't clean the furnace wall and the last to do that, and heating evaporation, and there will be some oil vapor by adsorption. When removing dust will be, ash, _ stick. So the wall should be on the final wash clean.

Vacuum brazing furnace mainly Outlines and performance

Vacuum brazing furnace mainly Outlines and performance

Vacuum brazing furnace in vacuum arc of high temperature melting can make metal degassing, oxygen, and the process of removing impurities, pure metal billet is achieved. Under the action of molten metal in the water cooled copper crucible cooling solidification, as a result, high melting rate and the precise control of arc heating area, can guarantee the consistency of the direction of the molten metal solidification, and prevent solidification macro segregation and reduce the number of micro segregation, greatly improving the solidification of the ingot metal performance.
Vacuum furnace is through the material or parts under the vacuum state according to the technical process heating, cooling, to achieve the expected performance of a process. Vacuum furnace Namely in the condition of vacuum, heating up a set of components to the filler metal melting point temperature above, but below the substrate metal melting point temperature, with the aid of filler metal to wet and flow of metal in the matrix form of weld a welding process. (brazing temperature in different material varies) vacuum furnace under vacuum condition, heat the metal powder products, make the adjacent metal powder grain by adhesion and diffusion effect and a method of burn into parts. Vacuum furnace Mainly applied to metal materials and magnetic treatment.

Simple understanding of vacuum brazing furnace

Simple understanding of vacuum brazing furnace

Everyone's understanding of vacuum brazing furnace how many? In order to make people more about the product master, we'll give you a brief introduction of below!
Vacuum brazing furnace is the large-scale equipment, heat treatment can be vacuum brazing, vacuum annealing, vacuum aging and other processing. Programmable multiple different procedures, it can control and into hundreds of heat treatment curve points, six points up, down, left and right sides, front and rear area temperature control, there are more and single point temperature recorder and over temperature protection device, furnace temperature uniformity can be controlled in less than 3 ℃, the other with the installation of high purity nitrogen high flow of strong cold.
The equipment has a large amount of furnace charging and high efficiency, have special request for complex parts and parts no need for supplementary processing products.

The use of vacuum brazing furnace in good condition

The use of vacuum brazing furnace in good condition

Using gas, liquid hydrogen through outdoor of finned tube evaporator liquid tank evaporation, and concession road into large indoor air tank, in the furnace need to provide a large number of gas during the forced air cooling. Although gas supply manufacturers in the liquefied gas tanker exit gas purity of 9.998%, but according to the requirements of technical conditions should be checked at the entrance of each furnace gas dew point.
Asked dew point average for a 65 "F (18 ℃). Every six months a leak test should be made for the whole system to the root to the end, the vacuum brazing furnace running just is the result of users continuously maintained. In today's world, success is only a compromise between the gain and loss and efficiency. Users are concerned about the vacuum brazing furnace good used condition.

The main technique index of vacuum brazing furnace

The main technique index of vacuum brazing furnace

Vacuum brazing furnace is mainly used to apply in cars, planes, ships, compressors, air separation equipment, carbide, diamond, household appliances, such as all kinds of heat exchanger, oil cooler and a variety of vacuum brazing of the antenna, electronic communication components, application scope is broad, the following is to tell everyone about vacuum brazing furnace equipment main technical indicators:
1, the furnace type: single room, horizontal.
2, the workspace: 900 (L) x 600 (W) x 600 mm (H).
3, charge: 500 kg/furnace (fixture).
4, the highest temperature: 1320 ℃.
5, the ultimate vacuum: 6 x 10-4 pa (empty furnace, cold, the purification).
6, pressure rise rate: < 0.2 Pa/h.
7, temperature uniformity, plus or minus 3 ℃ or less.
8, the temperature control precision: + / - 1 ℃ or less.
9, charging ways: hydraulic forklift.
10, heating power: 150 kw.
11, no-load heating time: from room temperature to 1320 ℃ for 30 minutes or less.
12, the maximum cooling pressure: 2 bar.

Vacuum furnace exquisite workmanship

Vacuum furnace exquisite workmanship

Vacuum furnace play an irreplaceable role in mold production, mainly used in ceramic sintering, vacuum smelting and electric vacuum parts in addition to gas, annealing, brazing of the metal, and ceramic to metal seal, etc.
Vacuum furnace vacuum heat treatment can achieve almost the entire heat treatment process, such as quenching, annealing, tempering, carburizing, nitriding, during the quenching process can realize gas quenching, quenching oil, water nitrate quenching, quenching, etc., can also be vacuum brazing, sintering and surface treatment, etc. Vacuum furnace thermal efficiency is high, which can realize the rapid heating and cooling, which can realize no oxidation and decarburization, carburizing, can remove phosphorus crumbs on the surface of the workpiece, and has the effect such as degreasing degassing, so as to achieve the surface brightness purification effect. Generally speaking, the processed workpiece in the heating furnace is slow, and internal temperature difference is small, the thermal stress is small, so little deformation. Product qualified rate is high. Can reduce costs, have degassing effect, so as to improve the mechanical properties of the work and life. Good working environment, safety operation, no pollution and no pollution. Be processed workpiece no hydrogen embrittlement risk, to prevent surface of the titanium and refractory metal shell hydrogen embrittlement, stability and repeatability of vacuum heat treatment process. A series of advantages, the development of vacuum heat treatment equipment and technology is more and more attention and applied more and more widely.
Two professional vacuum heat treatment of vacuum technology and heat treatment technology that combines an integrated, refers to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum.

Aluminum brazing method

Aluminum brazing method

 An aluminum or aluminum alloy in the drying chamber, greenhouse, brazing room, through a continuous furnace cooling chamber, etc and make molten solder curing on the part of brazing method, its character is that: in the drying chamber in flux coating chamber, abut the flux coating chamber set flux generating device, set 30 ~ 46 in the flux generating device (weight) % AlF an aluminum or aluminum alloy in the drying chamber, greenhouse, brazing room, through a continuous furnace cooling chamber, etc and make molten solder curing on the part of brazing method, its characteristic is that; In the drying chamber in flux coating chamber, abut the flux coating chamber set flux generating device, set 30 ~ 46 in the flux generating device (weight) % ALF left [3] powder and 70-54 (weight) % K left [3] ALF left [6] powder in the presence of water to form water crushing after suspension, adjust the concentration of the waters suspension mixed powder into the water 95 ~ 90% 5 ~ 10%, and in the flux coating chamber the coating on the aluminum parts.

Brazing furnace production using tips

Brazing furnace production using tips

Brazing furnace, although is not very complicated industrial machinery and equipment, but also has a lot of skills in use process need to master and make processing, according to the situation of or produce a product quality may not be qualified. In general, brazing furnace production need to be considered in furnace structure, furnace temperature, heating process, many aspects, such as furnace atmosphere, these aspects will directly affect the production of the quality of the products. Vacuum furnace production using tips
The use of the brazing furnace also has a few tricks, for everybody simple introduction a few below:
Within the forging heating furnace, raise the temperature of metal, can reduce the melting resistance, but the temperature is too high will cause grain oxide or burnt, seriously affect the quality of the product in a vacuum furnace. In the proce ss of heat treatment, if the steel is heated to above the critical temperature of a point, and then suddenly use cooling cooling, can improve the hardness and strength of steel; If heated to a temperature below the critical temperature at some point after slow cooling, the more resilient and make steel.
In order to get smooth surface and dimension precision of artifacts, or to reduce the metal oxide to achieve protection mould, reduce machining allowance, etc, can be used in a variety of no less oxidation furnace. Within the open flame less, no oxidation furnace, reducing gas generated by the incomplete combustion of fuel in heating workpiece can make oxidation burning loss rate is reduced to below 0.6%.

The vacuum brazing furnace maintenance conditions

The vacuum brazing furnace maintenance conditions

Vacuum brazing furnace used in need of good maintenance and maintenance, so how to do daily maintenance work? Weifang vacuum furnace manufacturers today sent gold belt together to look at.
(1) the operator to understand all sorts of appearance, pump, all the parts of the equipment. Read and understand all kinds of specifications.
(2) the cooling water pressure should be between 0.1 ~ 0.2 Mpa, the water temperature is 45 ℃ or less.
(3) compressed air pressure is between 0.4 ~ 0.5 Mpa.
(4) before starting each furnace, to see the maintenance of gas cylinder capacity, to avoid the lack of gas filling, change of gas cylinders.
(5) after startup if any abnormal situation, should immediately remove or stop to find the reason.
(6) often see the back of each part of water, shall ensure that the parts have enough cooling water when working.
(7) when they stop using the equipment should be in furnace gas evacuation, not for a long time, to fill the gas maintenance, equipment in the water jacket of circulating water and put out.
(8) mechanical pump, roots pump should be regularly in oil gas, roots pump oil cup to have oil. When an oil change is bound to put the waste oil clean.
(9) pump oil change, internal oxidation, if any, to the dispersed pump internal oxidation layer disposal clean, then put on the new oil.
(10) the maintenance of filling the gas, the purity should not be less than 99.99%.
(11) of this equipment is not allowed to use flammable and corrosive gases as maintain atmosphere.
(12) equipment looks and appearance they stick to clean, scrub with water and furnace wall are not allowed to have with the vacuum type oil rag scrub.
(13) pneumatic system of pneumatic even three pieces of the oil-water separator to often water, oil mist device should be written to the scattered vacuum pump oil.
The machine voltage (14) equipment to ensure that in the range of 350 ~ 420 V. Three phase equilibrium.
(15) gauge, electric contact pressure gauge, the place such as thermocouple is often coated with scattered oil pump, to that of the bridge between form a layer of oil film, avoid air leakage. The above parts and flange joints are not allowed to use vacuum cement seal for a long time.