Brazing Machines
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Brazing Machines are categorized into 4 subcategories (totally 84 Companies) including 17 Companies Flame/Gas, 27 Companies Induction, 21 Companies Furnace / Atmosphere Controlled Br and 19 Companies Furnace Vacuume Br.Choose right one of right subcategories.
Brazing Process and Brazing Machines
When you want to purchase a brazing machine professionally or do brazing in your factory proficiently, you have to know some technical words and its terminology. It goes without saying it is almost impossible to understand technical points without knowing those words or phrases. So, we have brought some of key words and explain and describe them in an easy way.
The types of brazing machines include flame brazing machine, atmosphere controlled furnace brazing machine, induction brazing machine, vacuum brazing machine, resistance brazing machine, immersion brazing machine, infrared brazing machine and brazing machine Breeze penetrated.
What are differences between Brazing and welding?
As you may know Brazing is a kind of welding but there are some differences. We can categorize welding, brazing and soldering in some ways from temperature point of view, base metals and process. First from point of view of temperature. For welding process, temperature is more than 700 or 800 C˚ almost, for brazing, less than 700 C˚ and for soldering less than 300 C˚. From Base metals point of view, in welding process you normally joint two same metal in metallurgical but in brazing you are also able to join permanently the parts which basically are not the same as each other in metallurgical such as iron to cupper, cupper to aluminum, stainless steel to steel and even cast iron to stainless steel. There are also differences in process for example in brazing you are able to joint parts to each other using furnace for mass production but in welding you are not able to use furnace.
base metal, Part, Material:
When you want to purchase a brazing machine, supplier will ask you what the parts are and what base metals are. What is really deference between part and base metal? In brazing process, a part may have one or two components (we are not referring to Alloy or made of materials here). As joints could be either lap joints or butt joints, the joints are considered important to select proper filler or method of heating.
Capillary:
Capillary action makes molten filler metal moves toward the small gaps or clearness of the two parts. The small gap is filled with the molten filler metal. So, sometimes there is no need to put the filler metal everywhere there is a gap.
Forms of fillers:
In Brazing Process and soldering process fillers are Rod form, ring form (washer form or wire form), ribbon form, paste form (cream form),
Types of fillers:
The main types of fillers are Aluminum-silicon, Copper , Copper-silver ,Copper-zinc (brass) ,Copper-tin (bronze) ,Gold-silver and Nickel alloy but there are far more than those listed here. The percentage of material in alloy distinguishes applications of fillers in brazing process too.
Flux:
When you burn or heat something, you are making changes on chemical structures of the substance. Oxygen molecules want to react or influence on the chemical reaction. As we know oxygen is destructive in some ways and we have to prevent it. We are able to prevent it either by vacuuming the environment or an agent. In brazing process, we use both (creating vacuum mostly brazing in furnace and using agent such as flux in other process). So, flux is an agent preventing oxidation and dissolve the oxides already present on the base metal. There are two types of fluxes: white brazing flux and black brazing flux. Flux can be in form of powder, paste, liquid and coated on filler metal bras or inside of filler metal bars (flux core).
What are main points in purchasing a Brazing Machine?
Capacity:
PROPER CLEARANCES:
Fusion Temperature
The first thing you should notice, in purchasing a brazing machine, is capacity. Capacity determines which process is more suitable for your production line. For small capacity, semi-automatic machine, for medium capacity automatic such as rotary station and for big capacity and mass production, brazing furnace should be considered. It goes without saying we have to define small, medium and big quantity here and we have to consider the sizes of parts here. We define capacity here saying, less than 500 PCS per day, small capacity, less than 2000 PCS per day medium capacity and more than 3000 is considered big quantity for small parts (200x200x200 mm)
In brazing process, the principle of capillary action makes molten filler to fill out the gap called “clearness”. If the clearance less than standard or more than standard, the brazing process will be not performed properly or effectively. In case you would like to know more about proper clearance and allowance , check the following reliable website to get more technical information: lucasmilhaupt
Methods of Brazing
There are 4 main methods in which you can braze two parts as you have to heat the parts:
By Torch :
By Induction
By Furnace:
By Dip
Manual , semi-automatic and automatic
Conventional Furnace , Atmosphere Controlled Furnace and Vacuum Furnace
Selecting one of brazing procedures depends on sizes, forms, materials and capacity of the parts. So, we strongly recommend you to get some advice from brazing experts on methods of brazing.
What is gas saver device in Manual torch brazing?
when operators are doing brazing parts in manual torch brazing process, they may need to change positions of the parts at least in loading and uploading. While they are changing the positions or loading and uploading the parts, they do not turn off the flame as adjusting takes time. So, gas and oxygen get wasted. So, in order to save the gas and oxygen while the operators are not doing brazing, there is a device called “gas saver” save gas and oxygen. The gas saver equipped with a stopper, electrical igniter, electronic circular and solenoid valves prevents gas and oxygen wastage without need to adjust flame for every time.
In order to get more idea ,please check the supplier manufacturing the gas saver as follow: skbrazing
We strongly recommend you to start negotiating technical affairs first (if offer or quotation is reasonable to you) and make clear all vague points in technical affair and then start negotiating commercial affairs.
- prepare drawings (Drawing of products and Drawing of each parts)
- Email the drawing to tube bending supplier along with a letter introducing your company and products.
- Inform the supplier production capacity each day and each month and working shifts, working environment
- Study the quotation sent by supplier technically.
- Prepare an agreement as Performance Specifications having technical affairs and commercial affairs- we have enclosed one as example in our website.
When you make change the technical affairs, delivery time and terms may get changed.
Price, Payment Terms, Delivery Time, Packing, Guaranty, Warranty, Per acceptance, Final Acceptance, Delay Penalty, Inco Terms and Documents are considered as commercial affairs.
The Incoterms are a series of pre-defined commercial terms published by the International Chamber of Commerce defining, obligations, costs and risks of the delivery of goods. Ex-works, FOB, CFR, CPT, CIF are some of them.
It depends on locations and freight (by truck or ship) but we recommend you to request the supplier to pack the Brazing machine in seaworthy case.
In case you mention delay penalty in your agreement –signed by supplier and customer, you could clam penalty and deduct the amount of penalty as agreed in final payment.
There are two kinds of documents. commercial documents and technical documents. P/I, Invoice, Certificate of Origin, packing list, inspection if the machine has been inspected, manuals and drawings including electrical drawings, pneumatic drawings, wear parts drawings.
When supplier manufactured and tested the Brazing Machine in his own factory, they have to announce it to the customer. It would be better that customer attend in suppliers’ factory for two reasons. One: checking all requested parameters. Two: training, maintenance training. This acceptance is mostly called Pre-acceptance.
For Brazing Machines, suppliers would send their technical experts to install and run the brazing machine in customs’ factory. When the machine gets installed. The machine should work in two or three shifts to show potential defects.
