Abstract:
The screw has two or three non-circular super-imposed recesses. The depth of each recess is less than 1.2 mm and there is a less than 1° of draw in each recess. The screw head recess is formed using a punch (10) in a cold-heading process. The punch is formed in a profilating CNC machine, cutting the profiles (12, 14, 16) of the punch to a tolerance of better than ± 0.025 mm. A method of manufacture of a cold-forming punch for such a screw comprises providing a profilating head as one of the tools one a turret mounted adjacent the chuck in the CNC machine. The profilating head has several cutting elements, each being adjustable with respect to one another: axially, radially and angularly.
Abstract:
Apparatus and method for cutting wound plasters from a moving web of plaster material, wherein the web is cut alongside the edges thereof in order to form curved end edges of the plasters by means of cutting water jets, which are moved along a circular path in a uniform manner.
Abstract:
The invention relates to a device for producing semicircular or segmental arches on work pieces (1), especially wooden work pieces. The inventive device comprises a milling cutter (4) that rotates about a stationary shaft (2). The work piece (1) is fed to said milling cutter (4) by means of two guide profiles (16), the work piece (1) lying close to said guide profiles (16) by means of work piece guides (30). The work piece (1) is not supported by the working table (8) but at a constant distance thereof. The guide profiles (16) are positioned below the work piece (1) above the work table (8) in the zone formed between the two elements. The invention provides an especially space-saving and inexpensive device that does not require any additional space in front or behind the work table used.
Abstract:
A method of manufacturing a dynamic groove bearing (143) with a first bearing part (155) and a second bearing part (147) which are rotatable relative to one another. According to the method, the bearing parts (155, 147) are provided with cooperating bearing surfaces (165, 167; 185, 187), and the bearing surface (165, 167) of the first bearing part (155) is provided with a pattern of grooves (173, 169) by means of a metal-removing tool (17). In the method according to the invention, the first bearing part (155) is fastened to a rotatable support (57) of a machine tool (1), which support (57) is rotated in a constant direction. The tool (17) is periodically displaced relative to the first bearing part (155) parallel to a direction transverse to the bearing surface (165, 167) of the first bearing part (155) by means of a positioning device (15) with a frequency which is determined by a product of a rotation frequency of the support (57) and a number of grooves (171) to be provided on the bearing surface (165, 167) of the first bearing part (155).
Abstract:
The machine comprises a support (36, 37) for the pipe (38); means (36 to 43) for rotating said pipe (38); a cutting device (11); a frame (1); a first longitudinal guide (2) fixed on the frame (1); a moving unit (4) reciprocating on said guide (14) and carrying said cutting device (11); a transversal guide (10) mounted on the moving unit (4); a second longitudinal guide (13, 14, 15) mounted on the frame (1) movable parallel to itself with respect to the parallel first longitudinal guide (14); means (19 to 26) for moving said second longitudinal guide (13, 14, 15), said means (19 to 26) comprising a first arm (19) rotatably mounted on the frame (1) around an axis perpendicular to the guides (2; 13, 14, 15; 10) and hingedly with respect to the second longitudinal guide (13, 14, 15) around a hinge axis parallel to said rotation axis and means (26) for rotating the arm (19) with the same rotational speed with which the pipe (38) is rotated; a guided element (16) movable on both the transversal guide (10) and the second longitudinal guide (13, 14, 15); and a second arm (27) hingedly connected to said guided element (16) and to the frame (1) around axes which are parallel to the rotation axis of the first arm (19).
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung (1) zum Fügen von Werkstücken (3, 5) mittels eines Laserstrahls (7), wobei die Vorrichtung (1) aufweist: eine Scanneroptik (33) zum Führen des Laserstrahls (7); ein Andruckelement (13, 15, 21, 23), das während des Fügeprozesses zum Fixieren der Werkstücke (3, 5) entlang einer Andruckrichtung auf zumindest eines der Werkstücke (3, 5) gepresst wird; und ein Gehäuse (11), das die Scanneroptik (7) und den von der Scanneroptik (7) zu den Werkstücken (3, 5) hin verlaufenden Laserstrahl (7) umhaust; wobei das Andruckelement (13, 15, 21, 23) einen Teil des Gehäuses (11) bildet und relativ zu dem übrigen Gehäuse (11) mit mindestens einem Bewegungsfreiheitsgrad bewegbar ist.
Abstract:
The invention relates to a method for shaping a rotationally-symmetrical surface in a material. With this method, the material is rotated about an axis and a rotating element is placed in contact with the rotating material. The rotating element is provided with a symmetrical, coherent shaping edge, or is provided with such an edge at one end, or comprises, as an alternative, a shaping head which travels around a symmetrical, coherent contour. The axis of rotation of the rotating element is then placed at an angle to the axis of rotation of the material and, during shaping, a force is exerted on the rotating element such that the shaping edge or the shaping head is held in contact with the material and such that the lateral position of the shaping edge or the contour around which the rotating element travels in operation remains approximately constant with respect to the material. The shaping edge/contour has an acircular shape and the orientation thereof is kept approximately constant with respect to the material during shaping. Furthermore, the shape of the shaping edge/contour and the angle between the axis of rotation are matched to the desired aspherical shape of the surface of the material. The invention also relates to two devices and an auxiliary device for carrying out the methods.
Abstract:
A milling machine is provided with a mechanism (7) intended for mutual movement of the working table (3) and a platform (5) and consisting of at least two pairs of eccentrics (8, 10; 9, 11) located on both sides of a trajectory (O-O) of movement of the working table (3). The internal eccentric (8, 10) of each pair is mounted inside the other, external eccentric (9, 11) mounted in the platform (5) carrying the spindle head (6), has the possibility of rotation and fixing its position in relation to the external eccentric (9, 11) and is kinematically connected to the drive (2) for movement of the working table (3) in relation to the stand (1).
Abstract:
A method of working a polygon enabling a polyhedron to be formed on a work in such a way that a specific part of the polyhedron exactly agrees with a specified peripheral direction position on the work, wherein, in such a state that a tool blade is adapted to face a work peripheral direction position deviating from a specified position thereof as much as the difference between a first positional deviation (PE1), which accrues during a period from the start of rotation of a first main shaft (3a) having the work (1) mounted thereon to the time when the first and second main shafts (3a, 3b) reach normal running condiditons in which the both shafts rotate at a fixed ratio of speed, and a second positional deviation (PE2) which accrues during a period from the start of rotation of the second main shaft having the tool mounted thereon to the time of normal running condition, the rotation of the work and tool are started at the same time and, when a normal running condition is reached, feeding of the tool is started.