Abstract:
An improved chuck which retains the shank (100) of a cutting element (101) securely therein and may be manufactured from a single piece of metal provided with a throughbore (114) which is threaded at one end (120) to mate with a driving unit. The other end of the throughbore (114) may be sized to receive a cutting tool shank (100) or a collet (115) with a longitudinal slot (107) extending completely through the collet (115) making it resiliently insertable within the throughbore (114). A clamping means is positioned offset from the centerline of the tool shank (100) or collet (115). The clamping means may comprise two sleeves (108, 109) machined to mate with the peripheral surface (140) of the collet (115) or with tool shank (100). The sleeves (108, 109) are retained in a bore (116) extending transversely through and displaced from the center of the chuck. A threaded element (110) draws the sleeves (108, 109) into contact with the collet (115) or tool shank (100), maintaining a precisely centered cutting tool (101) orientation.
Abstract:
Es wird eine Spannvorrichtung für den Schaft (S) insbesondere eines an seinen Enden zu beschleifenden Tellerventilkörpers (18) vorgeschlagen, wobei in einem Grundkörper (1) eines drehbaren Gehäuses zwei Spannzangen (13) mit konischer, sich zu ihren Außenenden hin erweiternder Außenkontur vorgesehen sind, welche sich im gespannten Zustand der Kontur des von ihr gehaltenen, jedoch nicht verformten Schaftes (S) anpassen, wobei jede Spannzange (13) von einem Spannteil (7) in ihrer Einspannlage gehalten ist und jedes Spannteil (7), dessen Innenumfang dem Außenumfang der Spannzange (13) angepaßt ist, von Betätigungsorganen (4,15) axial verschiebbar ist.
Abstract:
@ Where components are drilled by means of a robot a problem occurs when different size holes are needed to be drilled. The existing solution to this problem is to provide a drill unit (including drill bit, chuck and feed device) for each size of hole to be drilled and programme the robot to select the appropriate drill unit from the series of drill units supplied, perform its task, replace the drill unit in its store and select a further drill unit. Thus a complete drill unit is changed for every change in hole size. The presently described arrangement provides means to effect only drill bit change, the chuck and feed unit remaining on the robot at all times. The arrangement also provides means to effect such drill bit change whilst the chuck is rotating thereby obviating the need to stop and restart every time the drill bit is changed.
Abstract:
PROBLEM TO BE SOLVED: To provide a vibration damper for a drill tube of a hole machining apparatus.SOLUTION: The damper comprises a closed loop bi-directional adjustment mechanism (bi-directional drive mechanism), which is operated from one side of the damper. The closed loop mechanism ensures that the position of a clamping sleeve has a one-to-one relationship with an adjustment mechanism and thereby enables controlled adjustment of clamping force to be performed. By arranging the adjustment mechanism at the one side of the clamping sleeve, replacement of a tool, for instance replacing of the clamping sleeve when using the drill tube of a large diameter, is facilitated.