Design a perimeter guard for the robot cell
Assignment 2
Your manufacturing plant has decided to automate a work cell consisting of a Turn Table, Two Welding Robots (FANUC ARC Mate 100iC series) and Two Stage Fixture for Left Hand and Right Hand Assembly.
- Your task is to work in groups to design a perimeter guard for the robot cell that includes: an access for personnel, the part loading concept (light curtains), emergency stops…You will specify length and height of perimeter guarding, light curtains, type and manufacture of door interlocks, emergency stops…
- You will include Safety Distance Calculation. Components used: Schmersal SLC 440 light curtains, Schmersal Safety relay SRB 301 ST V2, RF1V Idec Force Guided relays (contacts), Turn table stopping time is 250 ms.
- You will produce the drawing that will support your solution (basic dimension and location of all safety guarding and devices)
LOWER CONTROL ARM
ASSEMBLY OPERATIONS
Lower Control Arm SSGT WELD LENGTH
CELL CONCEPT
- TURN TABLE
- 2 ROBOTS
2 STAGE FIXTURES
SEQUENCE OF OPERATION
1 Operator unloads welded assembly from stage 2 fixture
- Operator unloads subassembly from stage 1 fixture and loads to stage 2 fixture
- Operator loads tube, LCA stamping and reinforcement plate to stage 1 fixture
- Operator loads shock tower bracket to stage 2 fixture
- Operator presses palm buttons
- Location pins extend, cylinders 1, 2, 3, 4 – stage 1 fixture (solenoid v. 1 ) and Location pins extend , cylinders 7, 8, 9, 10 – stage 2 fixture (solenoid 2)
- Location squeeze clamp extends, cylinder 5 - stage 1 (solenoid v. 3), and Location squeeze clamp extends, cylinder 11 – stage 2 (solenoid v. 4)
- Location squeeze clamp extends, cylinder 6 – stage 1 (solenoid v. 5), and Shock Tower Loader clamp extends, cylinder 12 – stage 2 (solenoid v. 6)
- Index table rotates 180 degrees to weld position
- Robot weld cycle starts
- Robot weld cycle completed
- Index table rotates 180 degrees to unload/load position
- Location pins retract, cylinders 1, 2, 3, 4 – stage 1 fixture (solenoid v. 1 ) and Location pins retract, cylinders 7, 8, 9, 10 – stage 2 fixture (solenoid 2)
- Location squeeze clamp retracts, cylinder 5 - stage 1 (solenoid v. 3), and Location squeeze clamp retracts, cylinder 11 – stage 2 (solenoid v. 4)
- Location squeeze clamp retracts, cylinder 6 – stage 1 (solenoid v. 5), and Shock Tower Loader clamp retracts, cylinder 12 – stage 2 (solenoid v. 6)
