Office Chair Assembly

Benarido Amri

25 Apr, 2022 03:01 PM

How to assemble a chair from many different individual parts.

1. Step 1:

   Before we start assembling the parts, we need to know a few things about assembly:

   • How to place the parts = We can place our parts by clicking the "place" symbol on the top left corner of the screen in the "component" section.
   • Ground = After placing our first part, we can ground it by right clicking on the part in the part lists located on the left side of the screen and clicking "grounded", once this is done the part should have a little pin symbol. When a part is grounded, it will not be able to move, making it easier to assemble other parts to it.

   

   • In our assembly, we generally only use 3 types of constraints which are mate, tangent, and insert. But we alter the constraint settings to suit our needs.
   • To use the constraint function, we just need to click on the surface, edge, or axis of one part and click on the other surface, edge, or axis of the other part based on how we want them to be assembled.

   
   

   
   

2. Step 2: First Assembly

   

   These are the parts that we're using to assemble the office chair, the up most part is the first part placed and the bottom most part is the last part placed.

   
   

   For the first part, I chose the bottom seat since it is the middle portion of the chair, the next step after placing is to ground the bottom seat.

   
   

   

   Attached to the bottom seat are the bottom cushion base, armchair mount assembly, armchair mount assembly (left), and the seat skeleton2. Shown in the figure above.

   All were attached using the mate constraint between the surfaces, and then axially.

   • Bottom cushion base to bottom seat

   

   • Armchair mount assemblies to bottom seat

   

   • Seat skeleton2 to bottom seat

   

   
   

   
   

   
   

3. Step 3: Second Assembly

   

   The second part of the assembly is to attach the four screws holding the bottom cushion base to the bottom seat, and the vertical stand. Highlighted in the picture above.

   Same as before, the constraints used were only mate constraint surface and axis.

   

   To the vertical stand, we attached the vertical stand bottom piece using the insert constraint, with a depth of -80 mm.

   

   
   

   The chair leg is then attached to the bottom piece vertical stand using the mate constraint edge and axis, the wheel assemblies are attached last to the chair leg using the mate constraint axis and then surface. As shown in the figure below:

   

   
   

   
   

   
   

4. Step 4: Third Assembly

   

   

   The last part of the assembly would be the "backrest" portion of the chair consisting of parts shown in the second image.

   • Attached to the seat skeleton2 (which was already attached to the bottom seat) are the upper back rest, and the headrest connector. Attached using the mate, axis, and tangent constraints.

   

   • After that, we attached the screws (Cushion screw 1:4) using the mate constraint surface, and axis.

   

   
   

   
   

   • Lastly we attached the headrest by using the mate and insert constraint.