摘要:
The invention relates to a circuit board unit and a method for production thereof. The circuit board unit comprises a circuit board topmost laminate (8; 19) with conductive tracks (10) on the upper side for mounting surface-mountable devices SMDs (12; 14; 18; 21). The circuit board topmost laminate (8; 19) features a thickness dimensioned such that the anticipated heat dissipated by the SMDs (12; 18) is transported from the upper side to the underside of the circuit board laminate (8; 19) to good effect. The circuit board unit further comprises an electrically insulating laminate (9) arranged under the circuit board topmost laminate (8; 19), inserts (15) made of a material with good heat conductivity and electrical insulation embedded in the electrically insulating laminate (9) at sites below SMDs (12; 18) with high heat dissipation, and a cooling plate (16) arranged below the electrically insulating laminate (9) and the inserts (15).
摘要:
Leiterplatteneinheit, umfassend: eine Leiterplatte (2) mit darauf gelöteten oberflächenmontierbaren Bauelementen (1, 17), auf der Leiterplatte (2) in Wärmeleitungsbereichen angeordnete thermisch belastete oberflächenmontierbare Leistungselemente (1), wobei die Wärmeleitungsbereiche metallische Durchkontaktierungen zur Wärmeleitung aufweisen,eine thermisch leitende und elektrisch isolierende Schicht (3), die zwischen den oberflächenmontierbaren Leistungselementen (1) und einem oder mehreren Kühlkörpern (4) im Bereich der Durchkontaktierungen angeordnet ist, wobei die oberflächenmontierbaren Leistungselemente mit wenigstens einem elastischen Clip (5) über die zwischenliegende Leiterplatte (2) derart gegen den oder die mehreren Kühlkörper (4) angepresst werden, dass die von den oberflächenmontierbaren Leistungselementen (1) erzeugte Wärme über die Durchkontaktierungen zu den Kühlkörpern (4) abgeleitet wird.
摘要:
The invention provides a method of operating a machine tool, e.g., an electrical discharge machine (4), and a machine tool system comprising a machine (4) for machining a workpiece wherein at least one of controlling, monitoring and carrying out of the machining of the workpiece is performed by a plurality of configurable modules (DRIVE; GEN; CONTROL), said modules (DRIVE; GEN; CONTROL) are arranged on the machine (4), and said modules (DRIVE; GEN; CONTROL) are so linked by a data network (6) to a node (5) for at least one of sending data to said node (5) and receiving data from said node (5).
摘要:
Hybrid-Kühlung für eine Leiterplatteneinheit für eine Werkzeugmaschine, mit: wenigstens einem Kühlkörper (4) der derart ausgebildet ist, dass er Wärme von oberflächenmontierbaren Leistungsbauelementen (1) auf der Leiterplatteneinheit aufnehmen kann, wobei der Kühlkörper einen Bereich zur Flüssigkeitskühlung und einen Bereich zur Luftkühlung aufweist, so dass er Wärme sowohl an ein gasförmiges als auch ein flüssiges Kühlmedium abgeben kann.
摘要:
The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source (8-17). The AC voltage is applied to an isolating transformer (27) disposed between the bipolar current source (8-17) and the spark gap (EL, WS). A first pulse capacitor (47, 48, 61, 62) is charged by the bipolar current source (8-17) to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer (27) is switched with a selected polarity to the spark gap (EL, WS).
摘要:
The invention relates to a method and a generator for generating a time sequence of discharge pulses for EDM machining wherein a pulse capacitor (22) for generating the discharge pulse is charged with a charging voltage (U_chrg) and then discharged into the spark gap. The pulse capacitor (22) after being discharged is recharged with a charging voltage (Uchrg) having the same polarity as that of the residual voltage (U_end) remaining at the pulse capacitor (22) after its discharge. Thereafter, the pulse capacitor (22) is discharged with a discharge pulse into the spark gap, wherein the polarity of the discharge pulse is independent of the polarity of the charging voltage (U_chrg) at the pulse capacitor (22) after its recharge.
摘要:
The invention relates to a method and a generator for generating a time sequence of discharge pulses separated from each other by pulse pauses for electrical discharge machining. At least two pulse capacitors (22) are discharged each in the form of a partial pulse into the spark gap for forming together a discharge pulse. A discharge pulse having a predetermined waveform is selected from a plurality of discharge pulses having differing predetermined waveforms. The discharge of the at least two pulse capacitors (22) is controlled such that the selected discharge pulse is generated with the predetermined waveform.