TALAT Lecture 3502 - CORE-Materials

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an angle (mostly 90 °) to the direction of movement of the punch. As opposed to compression in which similar forms can be created, the forming orifices remain here unchanged during the process. During lateral impact extrusion, the local deformation strain can reach values of up to εv = 5. In order to create the lateral form elements, an additional vertical or horizontal splitting of the tool is necessary, together with a tool closing action coupled to the punch movement. For this purpose a multi-acting toolmachine system is necessary. „Solid lateral“ impacts with pegs at 90° to the punch movement direction can be extruded using a transversely split container with a die arranged at right angles in the splitting (parting) plane. The pressing punches in the container halves, penetrate at the same speed, so that a pressing action, symmetrical to the splitting plane, is attained. alu Training in Aluminium Application Technologies Process Steps of Solid Lateral Impact Extrusion a) b) c) d) Source: K. Siegert a) Inserting the raw work-piece b) Compressing the raw work-piece TALAT 3502 16 c) Impact extrusion d) Ejecting finished part Pressing punch Holder with die-half Work-piece Holder with die-half Counter punch Process Steps of Solid Lateral Impact Extrusion 3502.04.03 Figure 3502.04.04 shows the process steps during the „cup lateral“ impact extrusion. In the „cup lateral“ impact extrusion process, rigid mandrels are arranged in the splitting (parting) plane at right angles to the direction of punch movement. At the end of the impact extrusion process, these mandrels can be pulled radially out of the work-piece using mechanical or hydraulic systems. The actual tool can now be opened to remove the finished part.
alu Training in Aluminium Application Technologies Process Steps of the Cup Lateral Impact Extrusion a) b) c) d) e) Source: K. Siegert a) Inserting the raw work-piece b) Compressing the raw work-piece c) Impact extrusion d) Retracting the mandrels e) Ejecting finished part TALAT 3502 17 1 Punch 2 Work-piece 3 Holder with die-half 4 Holder with die-half 5 Counter punch 6 Mandrel Process Steps of the Cup Lateral Impact Extrusion 3502.04.04 Process steps during the lateral impact extrusion of a flange or collar are shown in Figure 3502.04.05. The process steps during the lateral impact extrusion of a flange or collar are, in principle, same as those for the solid lateral impact extrusion, with the difference that the die is hollowed out at the circumference of the splitting plane, so that a flange or collar can be formed during pressing. a) Source: IFU Stuttgart Training in Aluminium Application Technologies Process Steps of Lateral Impact Extrusion of a Flange or Collar alu b) c) a) Inserting the raw work-piece b) Compressing the raw work-piece d) Process Steps of Lateral Impact Extrusion of a Flange or Collar c) Impact extrusion d) Ejecting finished part 5 1 3 2 Pressing punch 4 Holder with die-half Work-piece Holder with die-half Counter punch 6 3502.04.05
Page 1 and 2: TALAT Lecture 3502 Impact Extrusion
Page 3 and 4: Source: DIN 8583, part 6 Definition
Page 5 and 6: compressive forces“. The impact e
Page 7 and 8: a) b) c) d) Source: K.Siegert alu T
Page 9 and 10: and work-piece. The mandrel moves t
Page 11 and 12: Source: IfU Stuttgart alu Training
Page 13 and 14: The forming force Ftot is applied t
Page 15: Training in Aluminium Application T
Page 19 and 20: Stresses A three-dimensional state
Page 21 and 22: Figure 3502.05.04: Combined „soli
Page 23 and 24: Source: K. Lange alu Training in Al
Page 25 and 26: Material: Al 99,5 Punch Movement: 3

TALAT Lecture 3502 - CORE-Materials

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