What are some examples of specialized end-effectors unique to automotive production?
Specialized end-effectors are specialized tools that were developed specifically to increase the efficiency and reliability of specific tasks in an automotive production environment. These end-effectors handle all parts and processes in a vehicle assembly line. Every effort has been made to ensure that these tools can survive the rigors of high speed manufacturing, but still ensure a level of worker safety and accuracy to the process. Their adaptability allows automotive manufacturers to handle a variety of materials and components without difficulty.
- Heavy and water-cooled spot welding guns for joining metal parts
- MIG welding torches for more precise welding operations
- Paint atomizers or sprayers for an even coating of vehicle surfaces
- Sealant and adhesive dispensers for applying bonding materials
- Robust grippers like mechanical clamps, multi-cup vacuum grippers, and magnetic grippers for securely handling body panels, engines, windshields, tires etc.
How are welding guns or paint sprayers adapted for robotic use?
- In automotive robotics, welding guns and spray guns have been modified to support and operate in an automated environment. Spot welding guns have been flanged and water-cooled to absorb the heat produced by the welding process, have stiff, compact frame designs that permit constant force and alignment, and are mounted to a robot arm with a program specifying how they will be accurately and repeatedly positioned to achieve strong consistent welds.
- Robotic paint sprayers are designed to provide consistent coating and fine atomization with low overspray, these systems have fluid control systems and programs that will follow set paths and provide the same thickness of coating, even in complex shapes. Robotic paint sprayers utilize different programs for paint, have quick-change nozzle systems, and cleaning processes to manage time and productivity in the design.
What types of grippers are needed to handle large, heavy, or awkwardly shaped automotive parts (panels, engines, glass)?
Handling large, heavy or awkwardly shaped parts of automotive architecture; such as body panels, engine blocks or windshields can be a challenge. When it comes to those types of parts, you need a strong and "purpose-built" gripper that will allow for secure handling, in a damage free way, with precision and speed production.
- Mechanical clamps are able to use a strong, rigid gripping force for parts that have either precise edges or mounting features. Mechanical clamps are best suited for processes that are higher volume or repeatable where precise location and limited movement is required during transport or assembly.
- Multi-cup vacuum grippers will conform to curved or flat surfaces (like body-style panels or glass) while maximizing surface area for even suction with fewest stress points. This gives them the flexibility to minimize injury by reducing the amount of deformation or breakage by using flexibility suitable for fragile or contoured components.
- Magnetic grippers are typically used for ferrous components (like engine blocks or structural steel parts), allowing quick pick up and release. For heavy parts like engine blocks, they help make automating the process simpler by minimizing the need to fasten mechanically or position during gripping.
- Custom shaped grippers can use one or more of the technologies mentioned above or can be mono-shaped to suit unique or irregular geometries so that parts can be handled in a stable condition. Custom cups and grippers are often necessary for parts that are of unusual shape or surface that cannot be drilled or for which standard grips do not work.
Why is customization of end-effectors often required?
Customization is frequently needed for end-effectors because automotive manufacturing has a considerable variety of parts requiring different shapes, sizes, materials, and handling requirements. The standard gripper/tool may not provide the needed precision, grip strength, or compatibility necessary to perform particular tasks.
- Different parts should have different gripping forces, orientations (e.g., windshields versus engine blocks), and surface contact solutions.
- Customized end-effectors ensure safe handling of parts - particularly fragile or high-value components - without any damage during the handling process.
- Customized end-effectors allow robots to be combined in one unit to perform multiple tasks by combining multiple tools or sensors.
- Customization leads to better cycle times, reliability, and compatibility in automated systems or changeovers for parts.