Aluminium vacuum brazing furnace

The structure of aluminium vacuum brazing furnace should be advanced and reasonable. The heating elements should be uniformly arranged along the circumference of the heating chamber at 360 degrees, and the temperature uniformity is high. High-power and high-speed vacuum unit should be adopted. The vacuum recovery time is short.

Zonal temperature control, small workpiece deformation, high production efficiency. The utility model has the advantages of low cost, stable and reliable mechanical action, simple operation and flexible input of programming process. Manual/semi-automatic/automatic control, automatic alarm/display of faults. It can meet the requirements of vacuum brazing and quenching of the typical parts provided by users.

The aluminium vacuum brazing furnace should have reliable automatic control, monitoring, tracking and self-diagnosis functions at the international advanced level. Furnace supporting products and functional components have advanced international level, and can meet long-term, stable and reliable production needs. The energy-saving effect of the equipment is good.

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Vacuum Hot Press Furnace System Structure

Vacuum hot pressing furnaces are usually composed of several mechanical systems, as follows:

1. Vacuum system: It consists of oil diffusion pump, Roots pump, mechanical pump distribution electromagnetic pressure differential valve (to prevent sudden power outage, mechanical pump oil backfilling) inflatable valve, exhaust valve, vacuum butterfly valve, vacuum pressure gauge (+Pa) bellows, vacuum pipeline and support.

2. Hydraulic system: electric input mode is adopted. The hydraulic station is equipped with imported proportional valves, pressure sensors, displacement display, grating ruler (ranging accuracy 0.02 mm), hydraulic cylinder and other related hydraulic devices. The pressure regulation is semi-automatic and can be adjusted manually. The instrument can set the pressure automatically, and can realize voltage stabilization and holding.

3. Water cooling system: It is composed of various valve and pipeline related devices and has the function of automatically cutting off heating source or function of water-cut sound and light alarm.

4. Temperature control system: SCR is used to control temperature, equipped with PID function instrument and digital display meter. It has the function of over-temperature sound and light alarm. PLC touch screen can also be used to control temperature automatically, and historical data can be retained to facilitate the analysis of sintering process.

5. Inflation system: It is composed of various pipelines and valves, and equipped with electromagnetic vent valve and pressure sensor. When the pressure in the furnace is higher than the safety value, it will automatically vent. The inflatable pipeline is equipped with needle valve, which can control the inflatable volume.

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Diffusion Welding Equipment Welding Method

The temperature of diffusion welding equipment is an important welding parameter of diffusion welding. In a certain temperature range, the diffusion process accelerates with the increase of temperature, and the strength of the joint increases accordingly. However, the increase of temperature is limited by the conditions of high temperature strength of fixture, phase transformation and recrystallization of welding parts, and the temperature is higher than a certain value.

It has little effect on the quality of the joint. Therefore, the heating temperature of solid phase diffusion welding of most metal materials is set at 0.6 - 0.8 Tm (K), in which Tm is the melting point of base metal. Diffusion time, heat preservation and diffusion time are not independent variables, but closely related to temperature and pressure, and can vary in a wide range.

At higher temperatures and pressures, it takes only a few minutes; on the contrary, it takes hours. Diffusion welding with intermediate layer also depends on the thickness of intermediate layer and the requirement of joint composition and uniformity of structure. Higher pressure leads to higher quality joints, and the relationship between joint strength and pressure. When the grain size or surface roughness of the weldment is larger, the pressure required is also higher.

The upper limit of pressure is limited by the total deformation of the weldment and the capacity of the equipment. In addition to thermal isostatic pressure diffusion welding, it is usually 0.5-50 MPa. Welding is a kind of welding method which has been developed early and is still widely used in various arc welding methods. The arc burns between the end of the electrode and the surface of the welded workpiece.

Coatings under the action of arc heat can produce gas to protect arc on the one hand, on the other hand, slag can be produced to cover the surface of molten pool to prevent the interaction between molten metal and surrounding gas. The more important role of slag is to produce physical and chemical reactions with molten metal or to add alloying elements to improve the properties of weld metal.

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Применение печи и операция

Как хорошо установить вакуумную печь для спекания под давлением

Heat treatment vacuum furnace advantage

The heat treatment vacuum furnace has a wide range of points due to its low boiling point, so it is widely used. What are the advantages of the heat treatment vacuum furnace? Let's take a look at it together.

Advantages of heat treatment vacuum furnace:

1. It can be operated under vacuum and the safety is very good.

2. Regarding the high temperature and high pressure areas of the steel plate, it is different, which will extend the use time.

3. The planning is scientific and reasonable, and it can also save the area occupied.

4. The ability to exchange heat in the body, the power is very high, reducing the dregs of power.

5. Intelligent, able to complete automatic control and so on.

6. Since the heat exchanger is made of stainless steel, there is no pollution with regard to water quality.

7. Installation costs are cut a lot.

8. The power is high and the heat is fast, so a lot of fuel is saved.

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Vacuum System Control of Vacuum Furnace

Conventional control of vacuum system of three-stage pump of vacuum furnace, the main control circuits of mechanical pump, Roots pump and diffusion pump are equipped with imported air switch to protect the circuit, and the imported AC contactor is used as control output.

Vacuum measurement adopts domestic high-quality digital vacuum gauge, which has strong anti-interference ability and fast reaction speed. A high-vacuum gauge and a low-vacuum gauge measure the high and low vacuum degree in the vacuum chamber respectively, and send the measured value to the vacuum gauge to display, and output the set signal to the PLC to control the vacuum system. The pneumatic valve of the vacuum system is controlled by a high-quality solenoid valve through a pneumatic source. The electric signal has the output of plc, which can be manually and automatically controlled. According to the process and the vacuum gauge signal, the interlock can be realized.

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How does the vacuum sintering furnace work?

The vacuum sintering furnace is a furnace for protectively sintering the heated articles in a vacuum environment, and has various heating methods such as resistance heating, microwave heating, induction heating, and the like. The vacuum induction furnace is a furnace for protectively sintering the heated articles by induction heating, and can be classified into a power frequency, an intermediate frequency, a high frequency, and the like, and can be attributed to a subclass of the vacuum sintering furnace.gas-quenching/1700C-inert-gas-vacuum-atmosphere-furnace

The vacuum sintering furnace can meet the requirements of rapid heating process; the temperature control switcher is controlled by the imported multi-segment intelligent program Celsius controller, the stability and repeatability of the Celsius control switcher is very reliable; the frequency conversion stepless speed regulation is adopted, and the stainless steel mesh belt is transmitted. The new design concept ensures smooth delivery of the product. High temperature vacuum furnace.

The vacuum sintering furnace utilizes the principle of medium frequency induction heating to make the tungsten crucible in the coil generate high temperature and conduct it to the work through thermal radiation. It is suitable for powder molding sintering of refractory alloys such as tungsten, molybdenum and their alloys by scientific research and military units.Vacuum-heating-equipment-plasma-nitriding-furnace

vacuum atmosphere furnace characteristics

With the development of electronic information technology and economic prosperity, soft ferrite materials are more and more inclined to high-grade, small batch, multi-variety, short delivery period, good consistency and so on. In the past, the push-plate vacuum atmosphere furnace has gradually failed to meet the requirements of this high-grade product and changeable. The bell-shaped furnace came into being. The traditional soft ferrite manufacturers in the world have ordered the bell-shaped furnace. Laboratory-vacuum-tube-furnace-for-vacuum-atmosphere

With China's accession to the WTO, domestic ferrosilicon manufacturers have begun to experiment in order to adapt to the needs of the market, and have begun trials to produce high-end products. The market demand for bell jar furnaces has become increasingly urgent. Now according to the needs of the market, with reference to foreign similar equipment, we have developed a new generation of sintering equipment - bell-type vacuum atmosphere furnace series products, which use all-fiber high-temperature furnace lining, partition grouping and other technologies, with large batch output, temperature It has excellent uniformity of atmosphere, high consistency of sintered products and high yield. Compared with tunnel kiln, it is more flexible and has higher control precision, especially suitable for sintering and other products.1600-C-ceramic-sintering-furnace

The task of the bell-type vacuum atmosphere furnace is to achieve the desired purpose in a certain space. In addition, for the production type vacuum atmosphere furnace, the focus should be on the uniformity of temperature and atmosphere in an even small working area. Only when the temperature and atmosphere uniformity meet certain requirements can the consistency of batch sintered products be guaranteed.690-vacuum-melting-of-nickel-base-alloy-for-desulfurization