Week 5:- Rest Unit & Clamp Unit Design Challenge
Aim : To design 3 different types of power clamp unit and 2 different types of rest unit using different riser, blade and clamp arm for the given car panel.
Introduction :
Clamp unit :
A clamp unit is a unit designed to clamp / hold the car panel with NC blocks / rests / mylars by using a pneumatic clamp cylinder.
A clamp unit restricts the up and down motion of the car panel.
Shims are used in the upward & downward direction only.
Image : Clamp unit
Typical parts of clamp unit consists of ;
Fingers :
A finger is a NC block, which is mounted on the clamp arm of the cylinder. And will press the clamp arm towards the rest, so that it holds the car panel.
Rest :
A rest is a NC block, which is fixed to the unit to support the car panel, Also it resists the clamping force of the finger and thus clamp the car panel.
Clamp arm :
A clamp arm is a bought out part, to which all the movable parts are fixed. In general a clamp arm is a part of the clamp cylinder.
- Clamp arms are different for different for bore of the cylinder.
- Clamp arms are available in different hole pitch.
- Clamp arms are available as : Middle arm - A10, Right arm - A11, Left arm - A12.
Clamp cylinder :
A clamp cylinder is a pnematic device works with pressurised air. The clamp cylinder is used to open and close the parts fixed to the clamp arm fixed to the clamp body.
- Clamp cylinders are bought out parts, some of the manufacturers are : Tunkers and Destaco.
- Clamp cylinder are in general 40, 50, 63 and 80 bore capacity.
- Opens upto 135degree for horizontal clamp mounting.
- Opens upto 105degree for vertical clamp mounting.
Images : Design of clamp unit-1
Images : Design of clamp unit-2
Images : Design of clamp unit-3
Images : Assembly of all 3 clamps
Rest Unit :
A rest unit is a unit designed to support a car panel using NC blocks / mylars / rests.
Images : Design of rest unit 1
Images : Design of rest unit 2
Image : Design of rest units
Image : All clamps and rest units assembly