摘要:
To improve operation and output voltage, particularly at 400.degree. C. and less, an oxygen sensor, especially adapted to determine oxygen content of automotive exhaust gases, is constructed by utilizing two electrodes applied on a body of stabilized zirconium dioxide, for example a closed tube, by making an electrode exposed to the exhaust gases in form of a mixture of finely dispersed ceramic material and a platinum-rhodium alloy, the ceramic material being present at about 40% (by volume) and 60% (by volume) platinum-rhodium alloy of 50-94% platinum and 50-6% rhodium (by weight). The second electrode, exposed to a reference gas comprises an alloy of palladium and another noble metal in a ratio of about 19-90% (by weight) Pd and 81-10% (by weight) noble metal. This electrode may also contain up to 40% (by volume) finely dispersed ceramic material. The electrode exposed to the exhaust gases is covered with a porous coating. The electrodes can be applied as aqueous or organic solutions of soluble noble metal compounds or suspensions, colloidal suspensions, with organic solvents, and the like, and subsequent sintering.
摘要:
To manufacture a vibration-resistant, shock-resistant electrical connection on a ceramic substrate (11) having an electrically conductive layer (12) applied to a surface (13, 19) thereof, a groove or channel-like depression (16, 20) is formed in the surface, preferably also including a through-bore (18), into which a conductor (17) is placed. The space between the conductor and the groove, the through-bore, if provided, and an extending groove at the other surface (19) of the substrate is filled with a sinterable mass (21), preferably a cermet, containing a metal which is compatible with the metal of the conductor wire (17), both for example containing platinum. As a starting material, the plate with the grooves therein is extrusion-pressed, pre-sintered at a low temperature to give it form stability, then the electrode (12) is applied, then the electrical conductor (17) and the cermet is applied and then the entire sub-assembly is fired to sintering temperature, e.g. about 1500.degree. C.; if desired, a further protective coating (22) of magnesium spinel may be plasma-sprayed on. Due to shrinkage of the ceramic components, the wire (17) will be securely held in position in the groove, and the cermet additionally forming an electrical connection between the wire and the substrate (11). For additional strain relief, the groove can be undulating (FIG. 3).
摘要:
The invention relates to a device for generating teeth of workpieces (3) by hob peeling, having a workpiece spindle (1) that can be rotatably driven for accommodating the work wheel (3) to be geared, particularly internally, and having a tool spindle (2) that can be rotatably driven, said tool spindle (2) carrying a peeling wheel (4), which has a regular tooth pitch determined by the tooth spacing of the gearing of the workpiece (3). In order to improve the performance of the generic device and/or generic method, and to provide the peeling wheel suited therefor, it is proposed that the distance between at least some of the teeth of the peeling wheel (4) that are of identical shape corresponds to a multiple of the regular tooth pitch.
摘要:
A device for cutting teeth in gear blanks by hob peeling, the device having a workpiece spindle for holding the gear blank, the workpiece spindle being rotationally drivable about a workpiece rotational axis, the device having a tool spindle which carries a peeling wheel having cutting edges and which is rotationally drivable about a tool rotational axis, wherein the tool spindle and the workpiece spindle may be positioned relative to one another at a fixed or variable axis intersection angle, and for the purpose of forward feed and infeed, the tool spindle is movable relative to the workpiece spindle in the radial direction and in the axial direction with reference to the workpiece rotational axis by means of positioning drives, and the device having an electronic control device for controlling the positioning drives and rotationally driving the tool spindle and the workpiece spindle at a specified rotational speed ratio, optionally with a changing phase position. In order to expand the production spectrum, it is proposed that the control device is set up or may be set up in such a way that during cutting of teeth in a coarsely precut or uncut blank, a radial emerging motion out of the gear blank is superimposed on the axial feed at the end of the feed, and/or a radial submerging motion into the gear blank is superimposed on the axial feed at the start of the feed.
摘要:
A winding apparatus for winding a continuously advancing yarn to a package. In this process, the yarn is reciprocated by means of a rotary blade type traversing apparatus along a predetermined traverse stroke. In so doing, the yarn is alternately guided within the traverse stroke along a guiding edge of a main guide plate and along an opposite guiding edge of an auxiliary guide plate. The guiding edge of the main guide plate and the opposite guiding edge of the auxiliary guide plate extend through the traversing plane in opposite directions. The auxiliary guide plate is movable transverse to the traversing plane such that the opposite guiding edge of the auxiliary guide plate extends to a lesser extent or does not extend through the traversing plane.
摘要:
The invention relates to a device for generating teeth of workpieces (3) by hob peeling, having a workpiece spindle (1) that can be rotatably driven for accommodating the work wheel (3) to be geared, particularly internally, and having a tool spindle (2) that can be rotatably driven, said tool spindle (2) carrying a peeling wheel (4), which has a regular tooth pitch determined by the tooth spacing of the gearing of the workpiece (3). In order to improve the performance of the generic device and/or generic method, and to provide the peeling wheel suited therefor, it is proposed that the distance between at least some of the teeth of the peeling wheel (4) that are of identical shape corresponds to a multiple of the regular tooth pitch.
摘要:
A device for cutting teeth in gear blanks by hob peeling, the device having a workpiece spindle for holding the gear blank, the workpiece spindle being rotationally drivable about a workpiece rotational axis, the device having a tool spindle which carries a peeling wheel having cutting edges and which is rotationally drivable about a tool rotational axis, wherein the tool spindle and the workpiece spindle may be positioned relative to one another at a fixed or variable axis intersection angle, and for the purpose of forward feed and infeed, the tool spindle is movable relative to the workpiece spindle in the radial direction and in the axial direction with reference to the workpiece rotational axis by means of positioning drives, and the device having an electronic control device for controlling the positioning drives and rotationally driving the tool spindle and the workpiece spindle at a specified rotational speed ratio, optionally with a changing phase position. In order to expand the production spectrum, it is proposed that the control device is set up or may be set up in such a way that during cutting of teeth in a coarsely precut or uncut blank, a radial emerging motion out of the gear blank is superimposed on the axial feed at the end of the feed, and/or a radial submerging motion into the gear blank is superimposed on the axial feed at the start of the feed.