摘要:
A machine for machining workpieces, including a first column and a second column facing each other according to a first horizontal axis, a guide system guided displacement of at least one of the columns in parallel with the first horizontal axis, one or two tool units, each tool unit being arranged on respective column for controlled displacement perpendicularly to the first horizontal axis, on each column, a workpiece holding device, at least one of the workpiece holding devices being arranged for controlled displacement in parallel with the first horizontal axis, where the workpiece holding devices are arranged for supporting a workpiece between them and for controlled rotation of the workpiece around a workpiece axis parallel with the first horizontal axis.
摘要:
A physically crosslinked, closed cell continuous foam structure derived from recycled metallized polyolefin material; polypropylene, polyethylene, or combinations thereof, a crosslinking agent, and a chemical blowing agent is obtained. The foam structure is obtained by extruding a structure comprising a foam composition, irradiating the extruded structure with ionizing radiation, and continuously foaming the irradiated structure.
摘要:
A method for completely machining at least unprocessed centric journals (10) and crankpin journals (11), and the respective flat shoulders (9, 10) thereof surrounding the journals, of flanged or cast blanks of a crankshaft first includes turning the flat shoulders (9) associated with the journals (10). Then, the centric journals (10) are roughly ground without the flat shoulders (9) thereof and the crankpin journals (11) are roughly ground together with the flat shoulders (12) thereof. After the journals (10, 11) have been roughly ground, an allowance remains that is smaller than an allowance required for common finish grinding of journals and flat shoulders. The rough grinding is followed by the finish grinding of the centric journals (10) and the crankpin journals (11) from the smaller allowance (23) remaining due to the rough grinding to the final dimension.
摘要:
A device for the fine machining of a circumferential workpiece surface arranged eccentrically relative to an axis of a workpiece. The device comprises a pressure mechanism configured to press a fine-machining tool against the circumferential workpiece surface. The device also includes a drive unit configured to drive an active section of the pressure mechanism via a first drive and a second drive. The first drive drives the active section in a movement plane that runs crosswise to the workpiece axis along a first movement trajectory. The second drive drives the active section along a second movement trajectory that is at an angle to the first movement trajectory.
摘要:
A crankshaft including narrow flat shoulders that are located next to a bearing pin at adjacent cheeks of the crankshaft. The narrow flat shoulders are machined by turning a rotary tool. In the process, the crankshaft that is clamped in a fixed manner and rotates about a rotation and clamping axis in which also the centric longitudinal axis formed by centric bearing pins of the crank shaft is located. As a result, the bearing pins rotate with a geometric axis thereof on a circular path about the rotation and clamping axis. The rotary tool tracks the moving bearing pins with regard to the vertical and lateral movement thereof in two movement directions that are perpendicular to each other. As a result, the rotary tool is in consistent lateral engagement with the flat shoulder of the bearing pin.
摘要:
Machine and method for machining large crankshafts, which allows simple and reliable synchronization of the rotation of said crankshafts (14) at all points, where said machine has a machining tool (1) configured to move along at least one guide (2) between a first end supporting element (3) and a second end supporting element (4), comprising a first electronic angular position sensor (6) situated on a first rotation shaft (7) of said first end supporting element (3), also comprising a second electronic angular position sensor (8) located on a second rotation shaft (9) of said second end supporting element (4), so that the rotational movement of said first end supporting element (3) is electronically synchronized with the rotational movement of said second end supporting element (4) at all times during the machining of the crankshaft (14).
摘要:
A vertical outer circumferential cutter tip, which has an approximate hourglass shape that is narrower at its middle than at its ends, and all of its eight corners are acute angles. Both sides of the vertical outer circumferential cutter tip are relieved at an angle α. When performing cutting processing upon the side surface of a counter weight with the vertical outer circumferential cutter tip, excessive friction is prevented. The shapes of the upper end portion and the lower end portion of the vertical outer circumferential cutter tip are formed so as to be very gently convexed, and with a relief of an angle β. Abrasion of the upper end portion and the lower end portion of the vertical outer circumferential cutter tip is prevented before the acute angled corner used for cutting is damaged.
摘要:
Methods and compositions useful for subterranean formation treatments, such as hydraulic fracturing treatments and sand control that include porous materials. Such porous materials may be selectively configured porous material particles manufactured and/or treated with selected glazing materials, coating materials and/or penetrating materials to have desired strength and/or apparent density to fit particular downhole conditions for well treating such as hydraulic fracturing treatments and sand control treatments. Porous materials may also be employed in selected combinations to optimize fracture or sand control performance, and/or may be employed as relatively lightweight materials in liquid carbon dioxide-based well treatment systems.
摘要:
A process for hobble lathing, and preferred process applications, for the cutting of workpieces with non-circular or discontinuous contours on programmable lathes. The use and combination of a special program e.g. of thread cycles and hobble values for the diameter and/or the longitudinal axis or the pitch, the angle of the spindle, in option of a reciprocal-step technique and interleaved machining sequences opens up virtually infinite possibilities. The preferred applications of the process allow special threads to be cut on screw-in bodies, e.g. screw-in artificial hip joint sockets and bone screws for example with neutral or virtually any angle of pitch or relief of the thread blade as well as e.g. internal and external contours on workpieces for circular wedge connections. A particularly beneficial hip joint socket is presented comprising so-called screw or threaded surfaces.
摘要:
A machine tool for machining crankshafts for four cylinder engines. A machining station and two parallel workstations are arranged in the same horizontal plane on a frame extending along the transfer axis of a machining line. The machining station has two tool holder disks for machining the crankshafts. The two parallel work stations are arranged upstream and downstream from the machining station for rotating the two crankshafts. The tool holder disk of the machining station is movably mounted along the transfer axis and can move back and forth between one workstation and the other. A crankshaft can be machined at a workstation during the auxiliary operations needed to position a new crankshaft in the other workstation.