Production of curved preforms

A device for producing a curved preform from flat semi-finished fiber products, comprising:

• a shearing arrangement which has at least two rotating roll bodies arranged at a distance from one another in a conveying direction;
• a control arrangement connected to the at least two rotating roll bodies,
• wherein the control arrangement is configured to set rotational speeds (V1, V2) of the at least two rotating roll bodies, wherein said set rotational speeds are different from one another,
• wherein said at least two rotating roll bodies are formed so as to bear in a frictionally engaged manner against a semi-finished fiber product introduced into the device and to cooperate with the semi-finished fiber product in such a way that a shearing of fibers of the semi-finished fiber product results from a rotational speed difference (V1−V2) set by the control arrangement between the at least two roll bodies arranged at a distance from one another in the conveying direction to form a curved preform from the semi-finished fiber product
• wherein at least one of the at least two rotating roll bodies is pivotable or tiltable;
• and
• a semi-finished fiber product detection arrangement which detects position information relating to the semi-finished fiber product conveyed through the shearing arrangement,
• wherein the control arrangement controls pivoting or tilting of the at least one roll body as the semi-finished fiber product is conveyed dependent on detected position information of the semi-finished product detection arrangement.