Abstract: A roll-hardening machine for crankshafts with hard-rolling tools (2) which each have a hard-rolling roller head (1) and a counter-support roller that are each detachably attached to the ends (17) of appropriate scissors arms (3) by means of two clamping blocks (15) wherein respectively a first of the two clamping blocks (15) is positioned on the front surface (16) of the end (17) of the scissor arm (3) and the second clamping block is located at a right angle to the first (15) on the side surface (16) of this same scissor arm (3) on the tool side, characterized in that the first clamping block (15) is supported on the front surface (16) at the end (17) of the respective scissors arm (3) such that it can slide in the direction of the appropriate hard-rolling tool (1), the hard-rolling roller head (1) is supported moveably at the location of the second clamping block on the scissors arm (3), by having guide grooves on its front surfaces facing the scissors arm (3), wherein prismatic blocks of the scissors arm (

Abstract: On a hard-rolling machine (41) for crankshafts (1) there is provided a plurality of measuring probes (4) corresponding to the number of main bearings (3) to be measured, which are arranged on a measuring-probe bridge (6) with the mutual spacing (5). The measuring-probe bridge (6) is detachably connected via quick couplings to the free ends of swivel arms wherein as cable connection between the measuring probes (4) and an evaluation device there is provided a detachable cable plug which connects each measuring probe (4) to the evaluation device. The measuring-probe bridge (6) can be removed from the hard-rolling machine (41) together with the cable plug and then re-attached thereto, depending on which type of crankshaft (1) is to be hard-rolled.

Abstract: A tool is provided having two deep rolling work rollers (2) made of a hard material which, for the deep rolling of grooves in crankshaft journals or crank pins, are arranged at a first mutual distance that corresponds to the specific width of the journals. Each of the work rollers (2) is supported to float in a pocket-shaped recess (14) provided in a cage (4), in accordance with the first distance. The cage (4) consists of a material which, compared to the material of the work rollers (2), has a lower degree of hardness but superior sliding characteristics. The cage (4) is located at the extreme end of the long leg (5) of an L-shaped tool holder (6), and has a second distance (8) to a second cage for support of the same work rollers (2).

Abstract: A roller cage (6) is provided for a minimum of one work roller (3) of a tool for deep rolling of grooves or radii of a crankshaft bearing (1) where the work roller (3) at a section of its circumference is loosely guided by the roller cage (6) or inside a concave void of the roller cage (6). Portions of the roller cage (6) by which the work roller (3) is guided, consist of a material that dispenses solid lubricant to the work roller (3).

Abstract: A roller cage (4) is provided for the guidance of a minimum of one work roller (2) of a tool for deep rolling of radii or grooves on crankshaft journals or crank pins, where the roller cage (4) is supported at the end (8) of the long leg (9) of an L-shaped tool holder, and is loosely guided in the longitudinal direction of the long leg (9) in a tab engaging in a longitudinal groove on the underside (13) of the roller cage (4) from the end (8) of the long leg (9). The longitudinal groove of the roller cage (4) has a considerably greater width than the width of the tab.

Abstract: The fixed roll apparatus (8) of a fixed roll machine (1) for crankshafts (3) is constructed scissors-fashion. Two pivotable scissor arms (9 and 10) disposed opposite one another each bear a fixed roll head (13) and a support roll head (14) respectively. The support roll head (14) has two axis-parallel support rolls whose axes of rotation lie in a common plane. The support roll head (14) also has an axial guide roll which is disposed in front of the support rolls in the pivoting direction (35) for closure and whose axis of rotation is perpendicular to the axis of rotation of the crankshaft (3) and lies in a plane which forms an acute angle with the common plane of the axis of rotation of the support rolls, its diameter being larger than the width of the support roll head (14) and slightly smaller than the spacing of the adjacent oil collars of a main bearing pin or a connecting rod bearing pin.

Abstract: A roller cage (6) is provided for a minimum of one work roller (3) of a tool for deep rolling of grooves or radii of a crankshaft bearing (1) where the work roller (3) at a section of its circumference is loosely guided by the roller cage (6) or inside a concave void of the roller cage (6). Portions of the roller cage (6) by which the work roller (3) is guided, consist of a material that dispenses solid lubricant to the work roller (3).

Abstract: A roller cage (4) is provided for the guidance of a minimum of one work roller (2) of a tool for deep rolling of radii or grooves on crankshaft journals or crank pins, where the roller cage (4) is supported at the end (8) of the long leg (9) of an L-shaped tool holder, and is loosely guided in the longitudinal direction of the long leg (9) in a tab engaging in a longitudinal groove on the underside (13) of the roller cage (4) from the end (8) of the long leg (9). The longitudinal groove of the roller cage (4)has a considerably greater width than the width of the tab.

Abstract: A roller cage (1) is provided with a prismatic base body for guiding a minimum of one work roller designed for deep rolling of grooves on crankshaft journals or crank pins, in a first (7, 8) concave recess on one of the two faces (5) of the prismatic body on a section of the circumference of the work roller, wherein the rotational axis of the work roller is inclined at an angle (10), in which the section guided inside the roller cage (1) has a shorter distance to the longitudinal center (C-C) of the prismatic body than the remaining section with a first, groove shaped recess (11) along the longitudinal center (C-C) of the base area (3) of the prismatic body, as a passage for one support roller for the work roller, and a second groove shaped recess (12) along the longitudinal center (C-C) on the side (2) of the prismatic body located opposite the first groove shaped recess (11), for support of the roller cage (1) on the end of the long leg of an L-shaped tool holder, by providing on the second face of the pris

Abstract: A tool is provided having two deep rolling work rollers (2) made of a hard material which, for the deep rolling of grooves in crankshaft journals or crank pins, are arranged at a first mutual distance that corresponds to the specific width of the journals. Each of the work rollers (2) is supported to float in a pocket-shaped recess (14) provided in a cage (4), in accordance with the first distance. The cage (4) consists of a material which, compared to the material of the work rollers (2), has a lower degree of hardness but superior sliding characteristics. The cage (4) is located at the extreme end of the long leg (5) of an L-shaped tool holder (6), and has a second distance (8) to a second cage for support of the same work rollers (2).

Abstract: The present invention relates to an apparatus for machining workpieces (W1 to W4) by stock removal, in particular the main (a1 to a5) and/or connecting rod bearing journals (b1 to b4) of crankshafts. For this purpose the apparatus is equipped with at least two guideways (7, 8) which are distanced from one another and are arranged parallel with respect to one another and on which at least one workpiece fixture (9, 10) holding a workpiece (W1to W4) each can be moved from a transfer position (P1, P2) to a working position (A1 to A6), and with two discoid cutters (17, 18, 21) of which each can be moved on a cutter guideway (13, 14, 19), which is arranged between the guideways (7, 8), from a first working position (A1, A2, A5) in which it works on the workpiece (W1, W3) held by the first workpiece fixture (9) to a second working position (A3, A4) in which it works on the workpiece (W2, W4) held by the second workpiece fixture (10).

Abstract: A crankshaft (6) is rotated about its axis (7), and all of its crankpins (28, 29, 30), which each respectively have an eccentricity (e) relative to the axis (7), are simultaneously rotary milled by respective allocated rotary milling cutters (34, 35, 36) of a milling cutter set (12). The individual milling cutters (34, 35, 36) each respectively have an eccentricity (e) corresponding to the eccentricity of the respective crankpin that is allocated to be machined by the respective milling cutter. Furthermore, the milling cutter set (12) is rotated at the same rotational speed, i.e. with a rotational speed ratio of 1:1, relative to the rotating crankshaft, while simultaneously the milling cutter set is moved in the X-direction toward the crank-shaft axis to achieve a feed advance.

Abstract: A crankshaft (6) is rotated about its axis (7), and all of its crankpins (28, 29, 30), which each respectively have an eccentricity (e) relative to the axis (7), and all of its main bearing pins (62, 63, 64, 65), which each have non-eccentric cylindrical surfaces, are simultaneously rotary milled by respective first and second allocated rotary milling cutters (34, 35, 36, 70, 71, 72, 73) of a milling cutter set (12). The individual first milling cutters (34, 35, 36) each respectively have an eccentricity (e) corresponding to the eccentricity of the respective crankpin that is to be machined by the respective first milling cutter, while the second milling cutters are non-eccentric circular cutters. The milling cutter set (12) is rotated at the same rotational speed, i.e. with a rotational speed ratio of 1:1, relative to the rotating crankshaft, while simultaneously the milling cutter set is moved in the X-direction toward the crankshaft axis to achieve a feed advance.

Abstract: A machine for hard-rolling a workpiece such as a crankshaft includes a drive apparatus (7) for rotating the crankshaft (8, 113), suspension apparatuses (9 to 17), hard-rolling devices (18 to 26, 111) movably supported by the suspension apparatuses, and a crankshaft transport apparatus (100). Each hard rolling device is a scissors jaw including two scissors arms (46, 47, 114, 115), with respective hardening roller heads (66 to 69, 118) and respective opposite counter-support heads (74, 119) mounted on the upper ends of the scissors arms facing the crankshaft. Each suspension apparatus (9 to 17) is slidably adjustable along the rotation axis (27) of the drive apparatus (7). A drive arrangement (49, 122) is connected to the lower ends of the scissors arms directed away from the crankshaft, for closing and opening the scissors arms to a maximum opening width (59, 130) that is larger than twice the maximum structural radius (60, 131) of the crankshaft.

Abstract: Wheels of rail vehicles are trued while the wheels are kept rotating about a wheel center of rotation that is continuously corrected to keep the center of rotation in a fixed position in response to eccentricities a wheel may have, especially in its outer circumference. For this purpose, a sensor for each wheel of two wheels forming a set senses a respective excursion of a center of rotation of each wheel being trued in a set to provide respective excursion signals which are supplied to a central processing unit that provides control signals to a power drive for wheel guide rollers which support the wheel set to be trued. The power drive applies wheel position adjusting force components, preferably directed radially relative to the respective wheel rotational axis in response to the control signals from the central processing unit whereby the excursions are compensated and the wheel rotation center is kept in a fixed position.

Abstract: A milling cutter for truing railroad wheels has a milling drive shaft (10) with at least two, preferably three, cutter sections (3, 4, 5). One fixed cutter section (4) is rigidly connected to the shaft (10). At least one, preferably two, cutter sections (3, 5) are axially shiftable along the shaft (10) and receive their torque drive through the fixed cutter section through a releasable coupling such as a claw clutch (9, 30). One axially shiftable section (3, 5) is positioned on each side of the fixed section (4), with a gap (22) therebetween. Preferably, the shiftable sections (3, 5) are interconnected (at 21) so that an axial adjustment of one section is synchronously transmitted to the other section and vice versa.

Abstract: An ultrasonic transducer apparatus includes an emitter for emitting pulsed ultrasonic signals into a railroad wheel to be tested and at least one receiver for receiving the corresponding echo signals from the wheel. Transmission of the ultrasonic signals into the wheel as well as the return transmission of signals from the wheel to the receiver can be carried out in a contacting and/or non-contacting manner. The emitter (2) and the receiver (3) are arranged spaced apart from one another around the circumference of the railroad wheel (1), with a sufficient spacing distance that the receiver (3) is arranged outside of a symmetrical range (4) about the centerline (6) of the emitter (2) in which superposition of the two pulse packets of ultrasonic signals travelling around the wheel can arise.