US 8,281,636 B2Granted

Heading device

AssigneeWAFIOS Aktiengesellschaft

InventorsJörg Möck, Dirk Taigel

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Abstract

In a heading device for elongate workpieces having a hydraulic chucking unit and an shaping ram, which is movable axially from a retracted idle position against the workpiece, the chucking unit comprises a housing having a sliding body which is hydraulically displaceable in the axial direction of the workpiece from a starting position into a clamping position (and vice versa), in which at least two chucking segments which are situated uniformly around the workpiece are inserted, which, on their side facing toward the shaping ram, press against a locking plate which is inserted into the housing and can be fixed therein, are movable radially against the workpiece by a displacement of the sliding body in its clamping position, and each receive at least one clamping jaw, which can be pressed by the chucking segment holding it radially against the workpiece for its clamping. The shaping ram carries a forming tool for upsetting the workpiece on the extension side, using which it can be pressed against the head of the workpiece protruding axially from the clamping jaws upon extension through an opening provided in the locking plate, and is moved completely out of the opening in the locking plate with its forming tool in its retracted idle position.

Claims21

Dependent claims

A heading device for an elongate workpiece, comprising:

a hydraulically actuated chucking unit comprising a housing having a sliding body which is hydraulically displaceable in an axial direction between a starting position and a clamping position, at least two chucking segments inserted within the sliding body, and a locking plate having an opening inserted within the housing and removeably fixed therein, wherein the at least two chucking segments are movable in a radial direction between an open position and a clamped position with the axial displacement of the sliding body toward the clamping position radially moving the at least two chucking segments toward the clamped position and the axial displacement of the sliding body toward the starting position moving the at least two chucking segments toward the open position, and each of the at least two chucking segments receiving at least one clamping jaw for holding the at least two chucking segments radially against the workpiece in the clamped position;
and
a shaping ram carrying a forming tool moveable in the axial direction between a retracted idle position and an extended compression position, wherein the shaping ram carrying the forming tool is moveable completely out of the opening in the locking plate when in the retracted idle position, and the shaping ram carrying the forming tool extending through the opening in the locking plate when in the extended compression position, and wherein the forming tool is capable of shaping a forward end of the workpiece protruding axially from the clamping jaws by compressing the forward end when moved to the extended compression position.

A heading device for an elongate workpiece, the heading device having a central axis and comprising:

a hydraulically actuated chucking unit operably holding the workpiece, and
a shaping ram configured to operably engage within at least a portion of the chucking unit,
the shaping ram movable axially from a retracted idle position toward the workpiece in an extended working position and then back to the idle position,
the chucking unit comprising a housing and a sliding body which is hydraulically displaceable in the axial direction of the workpiece within the housing from a starting position into a clamping position and then back to the starting position, the sliding body having at least one or more inclined surfaces with respect to the central axis,
at least one chucking segment configured to be situated around the workpiece, each of the at least one chucking segments having an inclined surface engaged with one of the one or more inclined surfaces of the sliding body such that a displacement of the sliding body toward its clamping position moves the at least one chucking segment radially for clamping the workpiece, and
a locking plate removeably fixed to the housing;
each of the at least one chucking segments positioned against the locking plate, the locking plate having an opening through which the ram extends when moving from its retracted position towards the work piece in the extended working position, the locking plate configured to be radially removable outwardly when the ram is at the retracted position, wherein when the locking plate has been removed outwardly, each of the at least one chucking segments may be moved axially and be removed from the heading device.

4 more elements

Dependencies are inferred from the claim text.