How to choose the robot gripper correctly?

How to choose the robot gripper correctly? The choice of the robot gripper is always an important part of the robot arm design. We bring you the following tips, basic knowledge of the selection of grippers for specific parts.

The choice of fixture is very important for the success or failure of the robot cell integration. You need a precise and simple end effector that can handle as many different parts as possible.

First you must figure out what type of parts this gripper will handle. The following lists the points that we systematically consider when choosing a robot gripper. Choosing the right gripper can work well, have good functions, and play the best role, but if it is not suitable for your application, its advantages will be weakened.

size

The minimum and maximum dimensions of the object to be processed are very important data. You need to measure other geometric positions to see the best gripping position of the fixture. The internal and external geometry needs to be considered.

weight

The maximum weight of the part must be known. First, we must understand the payload of the gripper and the robot. Second, make sure that the gripper has the required clamping force to handle the part.

material

The material composition of the parts will also be a very important aspect of the clamping solution. The size and weight can be handled by the clamp, and the material also needs to be compatible with the clamp to ensure that the parts are held tightly. For example, some grippers cannot be used to handle fragile items (such as ceramics, wax, thin metal or glass, etc.), which are easily damaged. But for our adaptive fixture, the gripping surface can appropriately reduce the impact on the fragile surface, so the force control fixture can also become a part of the solution.

shape

Asymmetrical, tubular, spherical and conical parts are a headache for robot cell designers. It is very important to consider the shape of the part. Some fixture manufacturers can choose different fingertips that can be added to the fixture to suit specific applications. Ask if the fixture is suitable for your specific application.

Number of parts

Whether using a tool changer or an adaptive fixture, it is necessary to ensure that the robot tool can correctly grasp all parts. The tool changer is large and expensive, but the correct custom tool can be used to work on the virtual part of the part.

Your production plan

In addition, you should consider whether your production will change over time. If the assembly line has been manufacturing the same parts for the past ten years, it may not change often. On the other hand, if the assembly line has to integrate new parts every year, it should be considered that the fixture should be able to accommodate these additions. You can even consider using your gripper to adapt to other applications. Consider this factor and choose a gripper. Ensure that the fixture can be adapted to the potential operation of the robot cell in the future.

By determining the part specifications, you can now compare this data with the available fixture specifications. Through the shape and size of the parts that must be processed, you can determine the stroke of the fixture you need. Taking into account the material and weight of the part, the required clamping force can be calculated. What are the different parts that the fixture can handle? You can see whether the robot cell needs a tool changer, or whether a single fixture can work normally.

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