Tool unit of a rotary swaging machine

Abstract

The invention relates to a tool unit of a rotary swaging machine for shaping preferably rod-like or pipe-like workpieces. The tool unit has a plurality of shaping tools ( 22 ) which are arranged about an operating axis ( 18 ) and which can be driven radially relative to the operating axis ( 18 ) with a stroke movement by means of a tool drive. There are associated with the shaping tools adjustment means ( 38 ), by which stroke positions of the shaping tools ( 22 ) are adjustable in such a manner that the shaping tools ( 22 ) abut each other with a closing pressure which is dependent on the stroke positions adjusted when the shaping tools ( 22 ) are in a closed state. According to the invention, the tool unit has a measuring device for measuring a parameter, by means of which the closure pressure produced at the adjusted stroke positions of the shaping tools ( 22 ) can be verified.

1 . Tool unit ( 10 ) of a rotary swaging machine ( 12 ) for shaping preferably rod-like or pipe-like workpieces, having a plurality of shaping tools ( 22 ) which are arranged about an operating axis ( 1 ) and which can be driven radially relative to the operating axis ( 18 ) with a stroke movement by means of a tool drive ( 30 ), and having adjustment means ( 38 ), by which stroke positions of the shaping tools ( 22 ) are adjustable in such a manner that the shaping tools ( 22 ) abut each other with a closing pressure which is dependent on the stroke positions adjusted when the shaping tools ( 22 ) are in a closed state, characterised in that there is provided a measuring device ( 40 ) for measuring a parameter, by means of which the closure pressure produced at the adjusted stroke positions of the shaping tools ( 22 ) can be verified. 
     
     
         2 . Tool unit according to  claim 1 , characterised in that a control unit ( 42 ) is provided for closure pressure control, it being possible to process the measured parameter for verifying the closure pressure by means of the control unit ( 42 ), in particular in relation to a desired range or desired value setting. 
     
     
         3 . Tool unit according to either  claim 1 , characterised in that there is provided in order to verify the closure pressure an operating mode of the tool unit ( 10 ), which can be selected via a control unit ( 42 ) for controlling the closure pressure. 
     
     
         4 . Tool unit according to  claim 1 , characterised in that the tool drive ( 30 ) is provided in order to produce a relative rotational movement of a tool holder ( 28 ) and an external ring ( 32 ) which engages round the tool holder ( 28 ). 
     
     
         5 . Tool unit according to  claim 1 , characterised in that the measuring device ( 40 ) is provided for measuring a parameter, y means of which a drive torque for driving the shaping tools ( 22 ) can be established. 
     
     
         6 . Tool unit according to  claim 1 , characterised in that the measuring device ( 40 ) is provided for measuring a consumption of electrical current of the tool drive ( 30 ) when the shaping tools ( 22 ) are driven. 
     
     
         7 . Tool unit according to  claim 2 , characterised in that the closure pressure can be determined by the control unit ( 42 ) using a characteristic line, which is preferably defined in the control unit ( 42 ), for the measured parameter or a characteristic value of the tool drive determined from the parameter and the closure pressure. 
     
     
         8 . Tool unit according to  claim 1 , characterised in that the adjustment means ( 38 ) are in the form of a plurality of adjustment wedges which are preferably guided between the shaping tools ( 22 ) and swaging rams ( 24 ) associated therewith and which are arranged parallel with the operating axis ( 18 ), the adjustment wedges being longitudinally displaceable in the direction towards the operating axis ( 18 ) relative to the shaping tools ( 22 ) in order to adjust the stroke positions of the shaping tools ( 22 ). 
     
     
         9 . Tool unit according to  claim 2 , characterised in that the adjustment means ( 38 ) can be controlled in accordance with the closure pressure by means of the control unit ( 42 ). 
     
     
         10 . Tool unit according to  claim 1 , characterised in that the stroke position of the shaping tools ( 22 ) or an adjustment position of the adjustment means ( 38 ) correlating to the stroke position can be used as a reference value for controlling workpiece shaping operations. 
     
     
         11 . Tool unit according to  claim 1 , characterised in that the tool unit ( 10 ) is in the form of an external, internal or double rotor, in particular a counter-rotor. 
     
     
         12 . Method for adjusting a tool unit according to  claim 1 , wherein there is verified by means of a measuring device ( 40 ) a closure pressure which is produced from the adjusted stroke position of the shaping tools ( 10 ) at the closure point thereof. 
     
     
         13 . Method according to  claim 12 , characterised in that the closure pressure is verified during driving of the shaping tools and simultaneous adjustment of the stroke positions of the shaping tools.