Abstract: Disclosed is a method for manufacturing a stator for an eccentric screw motor where at least two milling heads are used for machining the inner wall of the stator tube, wherein, at the start of the machining, one of the milling heads is brought to a predetermined position near the stator with respect to the end of the stator tube, the milling head is fed into the tube interior along its linear axis from this predetermined position, and a thread is machined until the milling head reaches at least the longitudinal center of the stator tube or exceeds a predetermined value, and the second milling head starts its machining of the inner wall surface of the stator tube at this point, wherein the milling head is moved along its linear axis and rotated about its rotary axis until the milling head reaches the centre of the stator tube.

Abstract: A facer for use in preparing the opposed ends of polyolefin pipes for fusion into a pipeline has a pair of cutting wheels which rotate in unison. A controller causes the cutting wheels to trace and face the pipe end walls in a closed loop path.

Abstract: A machine permits an end of a thick-walled, high-pressure tubing to be chucked in a collet one time, coned, faced and threaded, using a coning head and threading head which are mounted on a carriage which can be translated laterally between three positions and the coning and threading heads parallel to the longitudinal axis of the workpiece to complete the coning and threading operations.

Abstract: A level difference or a uncut portion is prevented from being left between adjoining worked regions without forming any useless worked region. A lathe sectional shape forming unit (222) produces a sheet model of a lathe sectional shape in an X-Z plane on the basis of the solid model of a lathe shape formed by a lathe shape forming unit (220). A first/second step working sectional shape forming unit (227) produces sheet models of the worked sectional shapes of the first step and the second step on the basis of the sheet model of the lathe sectional shape, a step dividing position and an overlap amount. A first step disused shape deleting unit (229) and a second step disused shape deleting unit (230) delete the shape needing no work, from the sheet models of the worked sectional shapes of the first step and the second step.

Abstract: The invention relates to a method for the grinding of a profile (1) of a workpiece (2) with a gear or profile grinding machine (3), wherein the profile (1) which has to be ground is successively at first ground during a roughing operation with a roughing grinding tool (4) and is afterwards ground during a finishing operation with a finishing grinding tool (5), wherein a stock of the profile (1) which has to be removed is ground by the roughing and the finishing operation, wherein the roughing grinding tool (4) and the finishing grinding tool (5) are arranged coaxially on a common tool spindle (6) or on two separate tool spindles and wherein a translational movement is created between the grinding tools (4, 5) and the workpiece (2) in a direction of a first axis (x) for carrying out a grinding stroke.

Abstract: A system for simultaneously forming multiple flutes in a carbide rotary cutting tool includes a chuck adapted to grasp a green rod member and selectively rotate the green rod member about, and translate the green rod member along, a first axis. The system further includes a mechanism adapted to simultaneously machine multiple flutes in the green rod member as the green rod member is rotated about, and translated along, the first axis.

Abstract: Endodontic instruments having a desired cutting edge are formed, at least in part, using a cold forming process. The method of forming the endodontic instrument includes providing a blank metal thread or wire and at least one die that has a negative impression of a cutting edge. The die is pressed against the blank with sufficient force in order for the die to form an at least partially formed cutting edge in the blank. Any desired shape can be formed into the blank by selecting a die with the proper corresponding negative impression. Cold forming techniques suitable for forming endodontic instruments include roll forming, flat rolling, radial forming, cold drawing, and similar techniques. The files can be sharpened or otherwise modified before or after cold-forming using techniques such as cutting, grinding, and chemical milling.

Abstract: An edge milling cutter assembly for cutting opposite edges of a workpiece, has a first cutting assembly; a second cutting assembly positioned a predetermined distance from the first cutting assembly; a first guide roll assembly positioned in front of the first cutting assembly; a second guide wall assembly positioned in front of the second cutting assembly; wherein the first guide roll assembly and the second guide roll assembly are movable in relation to each other in equal distances; and a mechanism which engages the first guide roll assembly and the second guide roll assembly to facilitate equal movement of each of the guide rolls in such a manner that the first and second cutting assemblies cut equal amounts of material from opposite edges of the workpiece.

Abstract: Machining techniques and machining apparatus are provided for treating workpieces in an efficient and reliable manner. The machining techniques and machining apparatus employ multiple thread whirling heads associated with a single machining assembly, such that each of the thread whirling heads is able to act on a workpiece during a single, uninterrupted machining process. Screw threads may be formed that include first and second thread profiles and an intermediate transition region. The machining apparatus generally includes a processor that is programmed to control operation of the multiple thread whirling heads in a sequential manner.

Abstract: A device (10) for soft machining of bevel gears, having a receptacle (12) for receiving a bevel gear blank (K1) and having a tool spindle (13.1) for receiving a cutter head (13.2). The device comprises a machining arm (11) having a pivot axis (A1) which has the tool spindle (13.1) for receiving the cutter head (13.2) on a first side and has a tool spindle (14.1) for receiving an end-milling cutter (14.2) on a second side. A CNC controller (S) puts the end-milling cutter (14.2) into rapid rotation to cut a predefined number of tooth gaps on the bevel gear blank (K1). After the machining arm (11) is pivoted, the cutter head used as the bevel gear finishing tool (13.2) is used. It is put into slower rotation to machining the bevel gear blank (K1) using the bevel gear finishing tool (13.2) in a post-machining process.

Abstract: The invention relates to a drill thread milling cutter (1) for producing a bore and for the subsequent milling of a thread in the bore, said drill thread milling cutter (1) having a working region (2), on the circumference (3) of which a number of drilling and milling cutting edges are arranged. A number of milling cutting edges (7, 8, 9, 10) greater than the number of drilling cutting edges (17) by a factor greater than 2 are arranged or are effective in the direction of rotation.

Abstract: A method for manufacturing endodontic instruments by milling. A provided metallic (e.g., a nickel-titanium alloy or stainless steel) thread or wire having a longitudinal axis is advanced along its longitudinal axis at a feedrate while contacting at least a portion of the metallic thread or wire with a plurality of rotating milling heads so as to remove portions of the thread or wire and yield a metallic rod including a cutting portion having a plurality of cutting edges.

Abstract: A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project laterally for cutting engagement with a work-piece while the tool spins about its axis. The tool also orbits within or about a work piece, and in one orbit of the tool in a helical cutting path relative to the work piece a number of complete turns of the screw-thread are formed which is equal to the number of teeth of the insert in engagement with the work-piece. A secondary cutter carried on the thread cutting milling tool provides for formation of a pilot portion or counter bore on the work piece at an end of the screw thread. The pilot portion or counter bore provides for alignment of a threaded member which is to engage the screw thread.

Abstract: A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project laterally for cutting engagement with a work-piece while the tool spins about its axis. The tool also orbits within or about a work piece, and in one orbit of the tool in a helical cutting path relative to the work piece a number of complete turns of the screw-thread are formed which is equal to the number of teeth of the insert in engagement with the work-piece. A secondary cutter carried on the thread cutting milling tool provides for formation of a pilot portion or counter bore on the work piece at an end of the screw thread. The pilot portion or counter bore provides for alignment of a threaded member which is to engage the screw thread.

Abstract: In a stand (1), a work-piece spindle (2) is mounted for rotation around a vertical axis (C). On the stand (1), a slide (3) can be shifted horizontally and on the slide, a work-piece carrier (5) can be swivelled around a vertical axis (C1). On the carrier (5), a slide (6) can be shifted vertically. The slide (6) bears a linear guide element (7) able to be swivelled around a horizontal axis (A) and on which a second slide (8) can be shifted. The slide (8) bears the grinding spindle (axis B) with mounted grinding worm (9). A dressing device (12) is arranged, relative to the axis (C1), opposite the work-piece spindle (2). The machine makes easy operation possible, because all parts to be operated are quite accessible.

Abstract: The automatic machine works on coiled stock to produce a series of workpieces. It comprises a spindle arranged to turn around its axis, but only somewhat more than through an angle of 360.degree., between two fixed angular limits. The tools consist of shaped milling cutters or grinding wheels which machine surfaces of revolutions on the workpieces.

Abstract: Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading and to enable cutting force to be directed through a large cross-sectional area of the insert.