How can I define temporary contacts in Ansys?

For a special simulation I need to define a temporary contact between three objects that two of them are perpendicular to one of them and the two push the one step by step. When they are at rest, there is a gap between them. After putting the force in one of them and pushing the other one, the program (ANSYS-Mechanical-Static/Transient Structural) cannot recognize the contact between the two objects and they are going into each other. I need to have the option to define a temporary contact for a moment and then delete the contact in many steps. I tried to use the guideline provided by Ansys-Tutorials but it did not work.
As you see in the attached photo, there are two forces and they will work one by one and not together. I want to have a contact for the piece 1 when force 1 is applying and then delete the contact and start the same procedure for force and piece 2.