Sheet metal joining is the essential process for stainless steel sheet, aluminium sheet and other sheet metal fabrications, especially for the products made of 2 or more pieces of metal sheets assembled together, so we also name this process as sheet metal assembly. Sheet metal Joints with rational design & exquisite workmanship provide the final products with a solid and reliable structure, and that can greatly ensure the products are used with quality and longevity and widely acceptable by many consumers.
Types Of Sheet Metal Joints
There are several types of sheet metal joints (sheet metal joining techniques) that are commonly applied by metal fabricators. How to choose a proper type depends on some factors and conditions of your metal product assembly. The manufacturer can flexibly perform a most proper way to fabricate for their specific products according to cost budget, application, size, function, and more properties. Below are some types of sheet metal joints commonly applied by fabricators.
Pros & Cons Of Different Types Of Sheet Metal Joining Techniques
From the descriptions about several process types of sheet metal joints, we can briefly understand some properties about them, but all of them have their own advantages and disadvantages, below is a table that can let you understand the advantages and disadvantages of these sheet metal joining techniques so that you can have an idea to know which one is the most proper one for your projects.
|Mechanical Joint||Low cost & reliable,|
Allows bling joint,
A wide variety of fasteners,
For various applications.
|Need additional fasteners such as nuts & standoff,|
Seals are required if waterproof is needed.
|Welding Joint||Permanent joint,|
Joints features with leak-proof,
High load-carrying capacity,
Allow complex shapes & structures.
|Material properties change near the welded points.|
Joining quality is difficult to inspect.
Welding in thin sheets can cause deforming and burn-though.
|Folding / Tab Joint||Low cost & reliable,|
Allows different metal types,
Fasteners are not required.
|Can’t achieve waterproof joints,|
Require a long joint area to enhance joining strength.
|Rivet Joint||Low cost of materials & operations, |
Allows blind joints.
|Part disassembly can cause damage to the parts.|
More stress concentration near the riveted points.
Additional riveting setup is required.
|Brazing Joint||Low temperature minimize distoration.|
Permanent or temporary joint,
Allow different metal types,
Damaging chance of parts is less.
|Low joining strength,|
High temperature cause disjoint.
|Clinching Joint||Permanent joint,|
Low cost of operation,
Requires additional fasteners,
Allows different metal types and thicknesses.
|Cost of initial setup is high.|
|Clinching Joint||No deformation as in welding,|
Provides excellent fatigue strength,
Damps vibration and absorbs shock.
|Need extra pressure and heat to enhance the bonding strength,|
Surface need to be cleaned.
Useful life is influenced by the environment.