Frequently Asked Questions

Our company can provide CNC milling, CNC turning, CNC grinding, CNC drilling, CNC deep hole drilling, CNC boring, wire cutting, EDM, thread milling and other machining services.

FARWARDER can provide vacuum brazing, vacuum diffusion welding and argon arc welding.

Aluminum alloy, stainless steel, titanium alloy, copper alloy, magnesium alloy, plastic, carbon steel, alloy steel, tool steel, hard alloy

6061 aluminum alloy, 6063 aluminum alloy, 3A21 aluminum alloy, 304 stainless steel, 316 stainless steel, 321 stainless steel, 15-5PH stainless steel, T2 copper

There is no minimum order quantity with our company. You can order one part if that’s what is required.

Length 1300mm  Width 700mm  Height 650mm

Length 1500mm, Width 800mm, Height 800mm

The shear strength of vacuum brazing aluminum alloy is greater than 50Mpa, and the brazing rate is greater than 75%.

FARWARDER can provide finished product services; the process flow chart is as follows:

Design and development–Incoming material inspection–Cutting–CNC rough machining–CNC finishing–Fixer–Surface treatment–Assembly–Finished product inspection–Packaging–Delivery

FARWARDER can provide chemical conductive oxidation, hard anodizing, sulfuric acid anodizing, electroplating copper, electroplating nickel, chemical nickel plating, paint spraying and other services.

To make a good quotation, we will need the following things:

• Product drawings or 3D model data files.
• The quantity of products you are going to make.

Within 24 hours

2D drawing formats: DWG DXF PDF TIFF SVG STL

3D drawing formats: STEP IGES OBJ FBX SLDPRT SLDDRW CATPart CATDrawing PRT DRW

Within 24 hours

The delivery cycle of the product is determined by the difficulty of product processing. Simple products are within one week, and complex products are determined by the process.

When placing a purchase order, a prepayment is required. The amount of the prepayment is agreed upon by both parties, and the balance is paid after the product is delivered and accepted.

FARWARDER has a dedicated after-sales service team, which mainly includes technicians, inspectors, and marketing specialists.

Our company can provide off-site repair services according to customer needs.

Parts repair, installation and commissioning, equipment maintenance, technical consultation, technical support

Engineering change notice, change drawings

Our company has set up a product complaint channel, in which the marketing department is responsible for accepting customer complaints, the quality department is responsible for confirming complaints, and the responsible department is organized to analyze the causes of complaints and formulate corrective measures.

① Adjust cutting parameters: Rationally select parameters such as tool material, cutting angle and cutting speed to ensure high processing efficiency while meeting quality requirements.

② Use suitable lubricants: Lubricants can reduce friction and heat during cutting, thereby reducing surface roughness. During the processing, suitable lubricants should be selected according to specific circumstances.

③ Check the condition of the machine tool: Ensure the stability and accuracy of the machine tool, and if necessary, maintain, service or replace the machine tool.

1) Porosity

① The causes include poor cleaning quality, large air flow in the welding site, improper selection of welding parameters, low purity of shielding gas, etc.

② Preventive measures

• Carefully clean the oil and oxide film on the surface of the weldment before welding.
• Choose a suitable welding site to avoid air flow.
• Optimize welding parameters and use high-purity shielding gas.

2) Flow:

① Due to excessively high brazing temperature or long holding time, large amount of parent material dissolved into liquid brazing material, large gap between brazing panels, large heat capacity of fixtures, etc.

② Preventive measures

• Control brazing temperature and time to avoid excessively high temperature and long holding time.
• Choose appropriate brazing gap and fixtures.

3) Melting:

① Mainly caused by improper brazing material selection, large amount of brazing material, inappropriate brazing temperature-time curve, etc.

② Preventive measures include:

• Select appropriate solder and brazing temperature-time curve.
• Control the amount of solder to avoid excessive solder.

4)‌Cracks‌:

①　Cracks are mainly caused by large clamping torque and internal stress.

②　Preventive measures

• Control the clamping torque and reduce internal stress.
• Select appropriate clamping method and process parameters.

5)‌Weld bulging‌:

①　Weld bulging is mainly caused by uneven parent material and excessively high brazing temperature.

②　Preventive measures: Select uniform parent material and control brazing temperature.

6)‌Poor welding‌:

①　Poor welding is mainly caused by unclean cleaning, inappropriate brazing temperature-time curve, high ambient humidity, low vacuum, poor flatness of the surface to be welded, and high roughness.

②　Preventive measures include:

• Ensure that the surface to be welded is clean and flat, and control ambient humidity and vacuum.
• Select a suitable brazing temperature-time curve.

7）Leakage

① Leakage is mainly caused by poor welding and unreasonable structural design.

② Preventive measures include: ensuring good welding and optimizing structural design.

8) Dislocation

① Dislocation is mainly caused by insufficient clamping force of tooling or improper assembly.

② Preventive measures include: strengthening the clamping force of tooling and ensuring correct assembly.

9) Deformation:

① Mainly caused by improper heating rate and cooling rate, insufficient clamping force, insufficient tooling rigidity, etc.

② Preventive measures include: controlling heating and cooling rates, ensuring clamping force and tooling rigidity.

10) Flow channel blockage

• Flow channel blockage is mainly caused by excessive amount of solder, unreasonable flow channel design, improper placement of substrate and cover plate, and excessively high brazing temperature.
• Preventive measures include: optimizing flow channel design and placement of substrate and cover plate, controlling brazing temperature。

3、What is the working principle of vacuum diffusion welding? What are the advantages?

The working principle of vacuum diffusion welding is based on the theory of material diffusion at high temperature. During the welding process, the workpiece is heated to the welding temperature so that the atoms on the welding interface diffuse with each other to form a welded joint. Under vacuum conditions, the gas and impurities on the welding interface will be removed to form a high-purity welded joint.

The advantages of vacuum diffusion welding include: high air tightness and strength of the welded joint, good quality of the welded joint, wide range of applications, small welding deformation, products with complex structures and great thickness differences can be welded, no welding slag, smooth welds, environmental protection and high efficiency.

4、What are the common vacuum brazing filler materials and what are their specific properties?

① Sn/Pb alloy: has good wettability and fluidity, can fill the joint gap and form good joint strength. However, due to the toxicity of Pb, it has been gradually replaced by lead-free solder in recent years.

② Ag-Cu alloy: has good wettability and high-temperature strength, suitable for various joint forms. It has a low melting point and can still maintain good performance at high temperatures.

③ Au solder: has good oxidation resistance and corrosion resistance, suitable for products requiring high durability. However, Au is expensive, which increases production costs.

④ Cu-Cr alloy: has good thermal stability and high-temperature strength, suitable for high-temperature brazing. However, its high cost limits its application range.

5、What is the difference between the strength and hardness of metals?

• Different definitions:

The strength of metals refers to the ability of materials to resist destruction under external forces. This ability covers the ability to resist plastic deformation and fracture, and is specifically divided into yield strength, tensile strength, compressive strength, etc.

The hardness of metals refers to the ability of materials to locally resist hard objects from pressing into their surface. It is an important parameter for evaluating the processing performance and wear resistance of materials. ‌

• ‌Different research objects‌:

Strength studies the deformation and destructive behavior of materials under overall stress, including organizational structure, deformation and failure under load, etc.

Hardness focuses more on the local resistance of the material surface.

• ‌Common indicators and measurement methods are different‌:

Common indicators of strength include tensile strength, compressive strength, shear strength, bending strength, etc., which are usually measured by static tests;

Common indicators of hardness include Rockwell hardness, Vickers hardness, Brinell hardness, etc., and the measurement methods use different methods due to their different classifications.