Robots for cars manufacturing:

Parts of the Robot:

1) Metallic arm
2)Joints
3) End effectors

End effectors 

In robotics, an end effector is the device at the end of a robotic arm, designed to interact with the environment. The exact nature of this device depends on the application of the robot.

types : 

Impactive – jaws or claws which physically grasp by direct impact upon the object.
Ingressive – pins, needles or hackles which physically penetrate the surface of the object (used in textile, carbon and glass fibre handling).
Astrictive – suction forces applied to the objects surface (whether by vacuum, magneto- or electro-adhesion).
Contigutive – requiring direct contact for adhesion to take place (such as glue, surface tension or freezing).
Drilling - drills holes
sprayer - sprays and paints the objects.