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:
The invention relates to an end mill (1) for processing a bearing region of a crankshaft, in particular a crankshaft of a ship's engine, with a base body (2) with an end face (3) and several inserts (4) designed for a turn milling, which are arranged on or in the end face (3). In order to achieve favorable chip removal conditions with low cutting forces and thus a low tool load, it is provided according to the invention that the inserts (4) each have at least one cutting edge which comprises alternately active cutting regions and non-active cutting regions.
摘要:
A throw-away tip is mounted on a first tip mounting seat of a pin mirror cutter. In the throw-away tip, cutting edges are formed at intersecting ridgeline parts between a pair of oppositely disposed long side faces of a substantially trapezoidal flat-plate-shaped tip body, and upper and lower faces of the tip body. A thickness direction of the tip body is approximately aligned with a radial direction of the cutter body to provide curved edges formed in acute corner parts of the tip body for cutting. The tip is mounted on a second tip mounting seat of the pin mirror cutter such that the thickness direction of the tip body is approximately aligned with an axial direction of the cutter body to provide curved edges formed in obtuse corner parts of the tip body for cutting.
摘要:
Disclosed is a method for machining the bearing seats (HL, PL) of shafts (1), especially crankshafts. According to said method, the bearing seats (HL, PL) are subjected to the following machining operations after initially shaping a shaft (1) in a forging or casting process: the bearing seats (HL, PL) are preformed by cutting the same using a specific cutting edge; they are hardened; they are passed through dressing rollers; they are subjected to a preliminary rotary milling process; and they are subjected to a final rotary milling process. The preliminary and the final rotary milling process are carried out during substantially an entire rotation of the shaft (1) without longitudinally or tangentially advancing the milling cutter (12).
摘要:
A method for machining a workpiece in which a machine tool comprising a first and a second chuck devices is employed to machine the workpiece, the machine tool being used in which the first and the second chuck devices comprise a chuck main body, plural chuck jaws, a chuck jaw drive body, and a pressing member, the method comprising: machining a clamp part of the other end part of the workpiece in a state where one end part of the workpiece is clamped by the first chuck device; machining a clamp part of the one end part of the workpiece in a state where the clamp part of the other end part of the workpiece is clamped by the second chuck device; and executing desired machining on the workpiece in a state where each of the clamp parts are clamped by each of the chuck devices.
摘要:
The invention relates to a cutting insert which can be used to clamp into a disk-shaped or strip-shaped tool body (30,36). Said cutting insert comprises a front surface (10, 22) to which a convex front surface (11) is joined to at least one side. The arc-shaped edges (12) of the front surface extend at an angular dimension of >90° and =180° and are embodied as cutting edges (12). According to the invention, either a linear edge which is essentially vertical in relation to the front surface or cutting edge (14) which runs counter to the vertical by a maximum 4° or a concave-shaped edge (24) are joined to the arc-shaped edge(s).
摘要:
The invention relates to a process and a device for machining of workpieces (10) like crankshafts or similar components which are rotated about their own axis during machining, at least two mutually independently operating rotary milling tools (15, 16, 21, 22) performing material-removing operations simultaneously at different points on the workpiece. In order to maximize the edge life of the tools used, with special regard to the most uniform wear possible on all the rotary milling tools, it is proposed that the rotation speed of the tools be matched or varied to provide an optimum cutting operation and the rotation speed of the second and any other rotary milling tool be controlled dependently upon the tool rotation speed predetermined by the matching or variation.
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.
摘要:
A crankshaft miller is constructed by providing two cutter units movably in a longitudinal direction of a work between a pair of work heads provided on a bed and supporting both ends of the work. A cutter for machining a main journal and a first resting device are provided in one of the pair of cutter units. A pitch of the cutter for machining a main journal and the first resting device is selected such that when a counterweight is machined by the cutter for machining a main journal, a main journal which is located adjacent a counterweight forming a pair with the counterweight is clamped by the first resting device. A cutter for machining a pin journal and a second resting device are provided in the other of the pair of cutter. A pitch of the cutter for machining a pin journal and the second resting device is selected such that when a pin journal is machined by means of the cutter for machining a pin journal, the main journal adjacent the pin journal is clamped by the second resting device.