摘要:
Method of cutting a three-dimensional shaped piece of a material having large pores out of a block by trimming the block with adjacent cuts of a predetermined width guided along planes extending tangentially to the surface of the shaped piece whereby scrap of the material is produced, and cutting kerfs into the scrap no later than the trimming along planes extending radially relative to the shaped piece surface and longitudinally substantially parallel to each other, the cutting planes being spaced from each other at the shaped piece surface a maximum distance corresponding to the predetermined width of the adjacent cuts. For this purpose, an ultrasound assembly may be used, which comprises a knife which has a shaft portion extending in the direction of vibration of the knife and a cutting portion attached to the shaft portion and extending transversely to the direction of vibration, the shaft portion and the cutting portion having cutting edges.
摘要:
A cutting installation for cutting out blanks from a sheet material band comprises a cutting table comprising a conveyor band forming a working surface and operable to move in a conveying direction, and a source of low pressure applicable thereto, a cutting head movable over the working surface of the conveyor band, the cutting head comprising a cutting tool, a sheet material band supply station arranged upstream of the conveyor band in the conveying direction, and a sheet material band receiving station arranged downstream of the conveyor band in the conveying direction. To rationalize the cutting operation and enable the waste to be separated automatically, the installation has a waste collector received on the cutting table, the waste collector comprising a carriage reciprocably movable along the conveyor band and including a guide roller extending transversely to the conveying direction and placeable upon the sheet material band, and a driven, rotatable storage roller arranged above the guide roller.
摘要:
In a method and machine for balancing centering a workpiece, such as a crankshaft, to be machined only at certain portions and in which the workpiece is transversely displaced with respect to an axis of rotation so as to minimize any unbalance and is subsequently cut to length, after which centering bores are formed in the opposite end faces of the workpiece to define the axis of rotation, the final balancing after the finishing machining of the workpiece is optimized by pre-balancing the workpiece in a manner which takes into account only the unbalance of those workpiece portions which will not be machined to determine the extent and direction of the transverse displacement.
摘要:
The workpiece is initially held in a position in which it has a free sag near the center of its length, where it is subsequently supported by a backrest for milling so as to eliminate only the elastic deformation of the workpiece which is due to the free sag. The backrest comprises a supporting jaw, adapted to be disposed under the workpiece, and to be vertically raised to engage the workpiece from below in a position of initial contact, at least one retaining jaw, adapted to be disposed above the workpiece and to be moved downwardly toward the workpiece to clamp the latter against the supporting jaw, and a detector arranged to detect and store the position in which the supporting jaw initially contacts the workpiece. A first drive is operable to raise the supporting jaw and the workpiece to a preselected extent above the position of initial contact. A second drive is operable to move the retaining jaw into engagement with the workpiece which has thus been raised.
摘要:
A carrying drum has an end face and is adapted to be rotatably mounted and to be rotationaly driven. An inserted-tooth cutter comprises an adapter ring flanged to said end face and provided with at least two retainers, which are axially spaced from each other and from said end face, and with radial through openings between adjacent ones of said retainers and between said retainers and said end face. Said inserted-tooth cutter further comprises at least two axially spaced apart, coaxial toothholders, which are adapted to surround said workpiece and are secured to respective ones of said retainers and carry teeth having radially inwardly facing cutting edges.
摘要:
A swaging machine (1) comprises hammering units (5) vertically movably guided in radial recesses (4) of a forging box (3) rotatably and drivably mounted about the axis of movement (A) and pressure members supported on a coaxial supporting ring (8) surrounding the forging box (3), where the forging box (3) and/or the supporting ring (8) can be driven so as to rotate relative to each other, and during the respective passage the pressure members act on the hammering units (5) whose head portions protrude into the path of rotation of the pressure members, in the sense of an inwardly directed pressure pulse. To achieve a rugged, hard wearing lifting drive, the pressure members are comprised of a pressure plate (10), which like a rocker is pivotally mounted at a plunger (9) non-rotatably seated in the supporting ring (8) so as to be swivelled in a stop-limited way about a rocking axis (B) parallel to the axis of movement (A), and as head portion the hammering units (5) have a counter-pressure plate (13) associated to the pressure plates (10), which like a rocker can be swivelled in a stop-limited way about a rocking axis (C) parallel to the axis of movement (A), where pressure plates (10) and counter-pressure plates (13) form cooperating slide faces (16, 17) and via restoring springs (18, 19) can be pressurized in the direction of a starting position forwardly inclined with respect to the respective relative rotation (R) of forging box (3) and supporting ring (8).
摘要:
A forging machine (1) comprises at least two forging punches (3) acting against each other and longitudinally guided in a forging box (1), which forging punches each have separate mechanical lifting drives and preferably vertical position adjusting means. To achieve a rugged lifting drive with high machine rigidities and a simplified construction, the lifting drives are comprised of a wobble plate drive (5) including a wobble plate (6) rotatably and drivably, but immovably mounted in the forging box (1) about a wobble axis (T) offset in parallel to the respective forging punch axis (S), and a pressure plate (9) associated to the wobble plate (6) and supported in the manner of a ball-and-socket joint on the end face of the associated forging punch (3) facing the wobble plate, where preferably the forging punches (3) can be pressurized via pressure springs (11) in the sense of a frictional connectoin of wobble plates (6) and pressure plates (9).
摘要:
For producing metallic bar stock there is first of all fabricated a primary product of substantially regularly round or angular cross-section, and this primary product is then deformed in cross-section to the final dimension corresponding to the bar stock by means of shaping. To provide for an efficient production of high-quality bar stock also in a minor quantity, the completely solidified primary product is subjected to a forging operation for a structural improvement before shaping it to the final dimension, during which forging off in one processing plane a spreading-restricted reduction of the cross-section in the range from (1.5 to 5):1 is effected.
摘要:
An apparatus for trimming three-dimensional workpieces made, e.g., of plastic comprises a bottom platen for supporting the workpieces and a cutter, which is movable relative to the bottom platen along a line of cut. To permit an automatic trimming by means of an inserted-tooth cutter, the bottom platen extends across the line of cut to support also that portion of the workpiece which is to be trimmed off. The bottom platen has a top surface for supporting the workpiece and is formed with a groove extending along the line of cut.
摘要:
An apparatus for processing workpieces, comprises a fixing deck, which has a supporting surface and is provided with fixing device, and a numerically controlled tool unit, which is movable over the supporting surface. In order to effect a reliable fixing of the workpieces by a simple and effective method, the fixing device comprises at least one holding-down unit, which includes a holding-down carriage, which is movable over the supporting surface, and a power-operable holding-down finger, which is operable at selectable locations, and that the carriage moving device and finger actuating device are adapted to be controlled in dependence on the control of the tool unit.