press

Abstract

The invention relates to a press (10) for plastically deforming tubular workpieces, in particular fittings, wherein the press (10) comprises: a motor (20); A force is applied to the workpiece during operation; a force transmission unit is coupled to the motor (20) and the press to transmit force from the motor (20) to the press; at least one sensor unit (42) is used to measure at least a squeeze parameter (P); a controller (40) that receives a current measurement of the squeeze parameter (P) from the sensor unit (42) and uses the current measurement to determine the squeeze parameter of the squeeze parameter (P) The slope (44) of the curve (K); Wherein, if the slope (44) of the extrusion parameter curve (K) of the extrusion parameter (P) satisfies a closing criterion, then the controller (40) reaches the maximum possible extrusion The extrusion process is terminated before the force (Pmax). The invention also relates to a corresponding method for operating the press (10).

Description

technical field [0001] The invention relates to a press for pressing tubular workpieces, in particular a manually operated press, and a method for operating the press. Background technique [0002] Methods are known in the prior art for pressing tubular workpieces, in particular pipes in assembly technology. In a known method, two pipe pieces are non-detachably connected to each other by means of a press fit. To this end, the pipe is inserted into the opening of the press fit, which has a polymer seal for sealing with the pipe. After insertion of the pipes to be connected, the press-fit is pressed, ie plastically deformed, by means of a suitable press, so that the inserted pipe can no longer be pulled out and the seal seals securely. [0003] Such pressing is performed using hand-held and motor-driven pressing tools, which may include replaceable tools of different sizes and geometries, such as pliers. Furthermore, extrusion tools are also known for other tasks, for examp...

AI Technical Summary

Problems solved by technology

[0007] However, the disadvantage of terminating the pressing process by means of a permanently arranged pressure relief valve is that when the maximum pressure is reached, the pressing jaws of the pressing tool may already be in contact with each other without deformation on the workpiece

Such pressing of the press jaws directly against each other would of course also lead to severe wear on the tool, on the force transmission part and on the drive motor

In addition, power is consumed unnecessarily

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