Tunnel brazing oven of aluminum condenser

Machine Overview

The tunnel brazing oven is an industrial equipment for continuous production. It has multiple equipment with different functions together to form a fully automatic production line. This production line is one of the most critical production equipment for automobile radiator and condenser at present.

The brazing furnace adopts a tunnel type structural design, and the material of the tunnel is stainless steel 316L with a thickness of 10mm. There is a pipeline inside the tunnel to transport nitrogen gas, ensuring that aluminum products will not oxidize or undergo adverse chemical reactions during high-temperature brazing.

This equipment has a high degree of automation in the production process. It has high temperature degreasing, flux spraying, automatic drying, high temperature aluminum brazing, forced cooling, nitrogen supply, etc. Workers can make their own products and put them on the chain smoothly. This equipment can efficiently complete all the work. It is very suitable for large-scale production of condenser factories.

Characteristics of tunnel brazing oven

Uniform heating

The heating element is located on the outside of the tunnel, and there is a stainless steel insulation layer with a thickness of 5mm on the outside of the heating element. The outer side of the insulation layer is insulation cotton with a thickness of 30mm. This structural design can radiate heat inward, keeping the temperature inside the tunnel uniformly heated and ensuring the stability of brazing quality.

High production efficiency

This Tunnel brazing oven adopts a continuous production line. It can produce 60-100 car radiator per hour. This production efficiency can meet the requirements of 90% of factories. Not only that, if your factory has higher production demand, we can provide a longer production line. Its production efficiency will improve a lot.

Energy-saving and environmental protection

By using the most advanced temperature heating technology, compared with the old brazing furnace, its heating efficiency has been increased by 30% and its energy consumption has been reduced by 26%. With the intelligent control system, it can significantly reduce its operating costs and achieve efficient energy conservation and emission reduction. This design is very consistent with the development trend of modern manufacturing industry.

safe and reliable

This tunnel brazing furnace only has a variety of advanced sensors, which automatically detect temperature, pressure, flow and other parameters during operation. In case of leakage or other failures, the control system will automatically alarm to ensure the smooth operation of the brazing furnace.

Tunnel brazing oven data

No.	ITEM	DATA
1	Appearance	100% NEW
2	Width	1.85m
3	Length	32m
4	Weight	23T
5	Nitrogen	40-65 m3/h
6	Transmission chain	china brand
7	Power	280KW

Other types of brazing furnace

Control System of Tunnel brazing oven

The control system is the soul of the brazing furnace, which directly affects whether the entire brazing furnace can operate normally. Not only that, a good control system can improve the quality of products, but also reduce energy consumption. So the brazing furnace control system provided by ChangHeng is one of the first advances in the industry. Next, let’s briefly introduce the advantages of this control system.

1. Friendly operating interface

The brazing furnace only has a 10.1-inch touch screen and a visual page design. It is very easy for engineers to operate it. It can be easily operated without strict training. Moreover, the parameter setting page and the monitoring page are two independent pages, which do not interfere with each other.

2. Multi language selection

The touch screen has multiple languages to choose from, with Chinese and English being the default. If you need other languages such as Russian, Spanish, French, etc., we can also meet your requirements. You only need to select the language you need on the homepage to enter the system, and the US page of this system will display the language you need.

3. Multiple control methods

99% of the functions can be set through the touch screen, but we also reserve the necessary physical buttons. If the touch screen fails, engineers can control the tunnel brazing furnace through the physical buttons to avoid unnecessary losses. In addition, we also reserve the interface to connect the laptop and also control the Tunnel brazing oven.

4. Running formula storage

In modern production plants, they usually have many radiator and condenser of different models and sizes. They need different temperatures and operating formulas to produce high-quality products. Our brazing furnace has fully considered this problem. Engineers can store a formula for each condenser that is operated by the brazing furnace. It is OK to call the formula with one key for the next production of the same product.

5. Data recording and analysis

Aluminum brazing technology is a process of continuous improvement. Every operation requires some minor adjustments. In order to meet this requirement, the brazing furnace has a built-in data recording function. Various data are recorded in the form of curves, such as temperature, pressure, flow, oxygen content, etc., providing valuable data for engineers.

Tunnel Brazing Oven video

Aluminum brazing process flow

The aluminum brazing process is a process of high temperature heat treatment. The aluminum core passes through the brazing furnace area with different functions to finally complete the brazing. There are some differences between the automobile radiator and the air conditioning condenser. For example, only the radiator aluminum core has ultrasonic cleaning, and only the condenser has high temperature degreasing. Let’s take the condenser as an example to understand the complete aluminum brazing process.

High temperature degreasing

Workers need to place the condenser core on the chain conveyor belt of the Tunnel brazing oven stably, and the conveyor belt slowly moves the condenser to the inside of the degreasing furnace. Its temperature is usually 120-180 ℃, which can effectively remove the grease on the product surface.

Flux spraying

When the aluminum core is degreased, it will automatically enter the flux spraying area. Nocolok flux is stirred with tap water, and the liquid is evenly sprayed onto the surface of the aluminum core by using a diaphragm pump. Then the fan forces to remove the excess water on the surface of the aluminum core. This spraying process does not require workers to participate.

Drying of aluminum core

When the aluminum core is sprayed, it will automatically enter the drying furnace. Its temperature is usually 250-280 ℃. If the aluminum core is not completely dried, it will destroy the atmosphere inside the brazing furnace, leading to the failure of the brazing process.

Aluminum brazing

After the aluminum core is thoroughly dried, it will enter the brazing zone, where the average temperature of the brazing furnace zone is approximately 615-620 ℃ If the thickness dimensions of the products are different, there may be slight differences in temperature, and nitrogen gas needs to be supplied inside the brazing area.

Cooling of Tunnel brazing oven

When the aluminum core brazing is completed and needs to enter this area for cooling, it is composed of multiple high-power fans. The old Tunnel brazing oven here uses water circulation cooling method, which mainly reduces the temperature of the aluminum product from 620 ℃ to 280 ℃.

Forced cooling

The forced cooling area is composed of three fans, two fans at the bottom and one fan at the top. The wind forms convection to cool the products efficiently. Its role is to cool the temperature of aluminum products from 280 ℃ to 30 ℃. Here, 1-2 workers are required to leave the brazing furnace and place the products neatly on the tray.

So far, the brazing process of an aluminum product has end.