Abstract: An exemplary camshaft for a high pressure common rail oil pump and a manufacturing method thereof is provided. The method achieves interference assembly between the mandrel and cam piece, and satisfies anti-rotating torque of the cam piece relative to the mandrel while ensuring the surface hardness of the cam piece. The camshaft includes a mandrel and a cam piece arranged on the mandrel. The anti-rotating torque of the cam piece relative to the mandrel is at least 500 NM after the cam piece and the mandrel are connected by interference fit by hot charge practice. Surface hardness of the cam piece 1 is at least HRC58. The method includes performing interference assembly of the cam piece and the mandrel while performing quenching heat treatment on the cam piece, then quickly cooling the cam piece equipped with the mandrel at the cooling stage during the quenching heat treatment.

Abstract: The invention relates to an apparatus for cooling a shrink-fit chuck, having a cooling attachment (1) that can be placed on the shrink-fit chuck and contains a plurality of feed openings for supplying a coolant into an interior of the cooling attachment (1). Connected to the cooling attachment (1) are a device for feeding a liquid coolant into the interior of the cooling attachment (1) and a suction-extraction device (15, 16) for the suction-extraction of the liquid coolant used for cooling the shrink-fit chuck from the interior of the cooling attachment (1).

Abstract: A method for installing a heated piston into a cylinder sleeve that is initially smaller than the piston includes: receiving the engine block at a heating station, heating the engine cylinder sleeve with heated air for a predetermined time at a predetermined temperature such that a temperature of the cylinder sleeve is equal to or greater than a temperature of the piston, and inserting the piston into the heated cylinder sleeve.

Abstract: A battery coupling method is provided for coupling a support member to a battery cell for supporting the battery cell provided with a group of electrodes. The battery coupling method includes: passing a protrusion part formed on the support member through a hole formed in the battery cell; pressing the support member using a pressing unit that approaches the support member from a side where a heating unit is positioned; heating a tip end of the protrusion part using the heating unit to form a heat-deformed part of a size which prevents extraction of the protrusion part from the hole; separating the heating unit from the heat-deformed part after the pressing and heating of the tip end of the protrusion part; and separating-the pressing unit from the support member after the pressing and heating of the tip end of the protrusion part.

Abstract: A method and apparatus for assembling a suspension. In one embodiment, a method includes altering a temperature of a first suspension component and then pressing the first suspension component and a second suspension component into engagement while the temperature remains substantially altered.

Abstract: A method is provided for use with an annular gas turbine engine component that includes a main body and an annular seal engaged to the main body with an interference fit. The method includes rotating the annular gas turbine engine component, directing thermal energy from a heat source at the annular seal to thermally expand the annular seal relative to the main body while the annular gas turbine engine component rotates, removing the heated annular seal from the main body, providing a newly manufactured replacement detail having substantially the same configuration as the main body, and engaging the removed annular seal to the replacement detail with an interference fit.

Abstract: A work setting apparatus includes a lower table 15 on which a first work W1 is set, an upper table 17, and a work holding unit 19 having a plurality of work holders 25 each having an adhesive to hold a second work W2. The work setting apparatus lowers the work holders until a predetermined short distance is established between the first and second works and drops the second work from the work holders onto the first work, thereby setting the second work onto the first work.

Abstract: An apparatus for configuring a gasket material to function with a plurality differently configured track systems, the system including a housing, an opening in the housing through which a gasket material is placed and is moved through, a receiving area through a side of the housing, a cutting device configured with a blade to extend through the receiving area and into the opening, and a slideable cam to define a reach of the blade within the opening.

Abstract: The present disclosure relates to a method for removing barrel nuts used for securing a plurality of studs to a turbine blade. Each stud is individually coupled to a respective barrel nut such that each barrel nut is anchored to a root end of the turbine blade. The barrel nut is heated to a predetermined temperature using a controller and a thermocouple. An adhesion between the barrel nut and the turbine blade is overcome and the barrel nut is extracted from the turbine blade. The barrel nut is removed from the turbine blade by connecting an extractor assembly or barrel nut removal device. This is accomplished from an interior surface of a root end of the turbine blade such that this method allows one to remove and replace barrel nuts while the turbine blade remains attached to the hub.

Abstract: A bolt (35) comprising a threaded shaft (36), and a heating element (37) for heating the shaft (36) is disclosed along with a method for securing a first part and a second part of a pipeline system together with the bolt (35). The method includes the steps of: heating the bolt (35) by heating the heating element (37); and securing the heated bolt to the first part and the second part of the pipeline system.

Abstract: A hypodermic needle extraction device for removing a hypodermic needle from a syringe having a syringe body and a luer, the device including at least one guide rod disposed with the device, a carriage assembly having a carriage slidably mounted on the guide rod, and a needle extraction assembly configured to grasp the needle such that the needle is separated from the syringe body as the syringe body and needle are urged apart. This Abstract is presented to meet requirements of 37 C.F.R. §1.72(b) only. This Abstract is not intended to identify key elements of the apparatus and methods disclosed herein or to delineate the scope thereof.

Abstract: Disclosed is a power unit for an electric steering system and a method for assembling such a power unit. The power unit comprises a motor and a control unit, wherein the control unit is connected to the motor by means of shrink fitting.

Abstract: An assembly facilitation apparatus for assembling and seating bearings on a gearbox pinion. The apparatus includes a bearing cup support for holding a bearing for assembly onto a pinion and an arm operatively connected to the bearing cup support. The arm is configured to engage the pinion and seat a bearing on a first portion of the pinion by moving the pinion axially in a first direction relative to the bearing.

Abstract: An assembly apparatus including a bearing support mechanism configured to hold a bearing for assembly into a housing and a housing register mechanism operatively connected to the bearing support mechanism. The housing register mechanism receives and aligns a housing with a bearing on the bearing support mechanism when the housing is placed over the housing register mechanism.

Abstract: A steering column assembly is provided. The assembly includes an outer jacket, an inner jacket telescopingly disposed within the outer jacket for movement along a longitudinal axis with a cavity defined between the inner and outer jackets. A bushing is radially disposed about the inner jacket within the cavity between the inner and outer jackets. The bushing includes at least one tab engaging the inner jacket to interconnect the bushing to the inner jacket and includes at least one radially projecting pad engaging the outer jacket to frictionally interconnect the bushing to the outer jacket for interlocking the inner and outer jackets.

Abstract: An apparatus is disclosed for accurately positioning a tool within a shrink-fit tool holder. The apparatus includes a combined tool presetter and heat-shrink device. The tool assembly is placed in a precision rotating spindle that is able to travel into a contained location for cooling of the tool assembly subsequent to heating the tool assembly through induction. The apparatus is adapted such that the precision rotating spindle precisely returns to a home measuring position subsequent to cooling for final measurement of the tool assembly. The presetter allows for measurements related to the tool assembly both prior to and subsequent to the shrink-fitting process.

Abstract: Embodiments of the present invention include helical, ring bar and tunnel ladder slow wave structures (SWSs). Embodiments of methods of micro-fabricating such SWSs are also disclosed. Embodiments of high frequency electromagnetic devices including such SWSs are also disclosed. Exemplary high frequency electromagnetic devices may include a traveling wave tube, a traveling wave tube amplifier, a back wave oscillator, as part of a linear accelerator, a microwave power module, a klystron or a millimeter-wave power module.

Abstract: A brush seal for use with a housing and sealing a high pressure area from a low pressure area is provided. In an embodiment, the brush seal includes a retainer and a plurality of bristles. The retainer is comprised of a thermally-sensitive material having a thermal expansion rate. The bristles are connected to and extend from the retainer. In an embodiment, the retainer is not fixedly connected to the housing, and the thermal expansion rate of the retainer is greater than the thermal expansion rate of a portion of the housing adjacent the retainer. In another embodiment, a joint associated with a plurality of bristles is permitted to move into a headspace provided above the joint. A method for making a control-gap brush seal assembly for use in connection with a shaft is also disclosed.

Abstract: A device (10) for thermally clamping and releasing tools (11) in shrink-fit chucks (12), having a socket (15) for a shrink-fit chuck (12), a heating unit (16) that can be moved toward and away from the mounted shrink-fit chuck (12), and a cooling unit (20) for cooling the heated shrink-fit chuck (12). The cooling unit (20) has at least one coolant distributor (21, 22) that is capable of moving in relation to the socket (15) with the mountable shrink-fit chuck (12), conveys a preferably fluid coolant, e.g. cooling water, and has outlets (23) for the coolant, which are oriented toward the socket (15) with the mountable shrink-fit chuck (12) and out of which the coolant travels under pressure to act on the outside of the socket (15) with the mountable shrink-fit chuck (12) for cooling purposes (FIG. 1).

Abstract: A shrinking arrangement for a tool holder (12) which retains a rotary tool (10) with a press fit in a central accommodating opening (20) comprises an accommodating unit (24) for accommodating the tool holder and a temperature-controlling arrangement (46, 64) at least for the thermal expansion, in particular also for subsequent cooling, of the tool holder in the region of the accommodating opening. According to the invention, the accommodating unit is arranged on a carriage (32) which is guided such that it can be displaced in the longitudinal direction of the rails of a rail system (30), which runs parallel to the axis (16) of the tool holder accommodated in the accommodating unit and is fastened on a supporting base (28), and it being possible for said carriage to be moved along its displacement path into at least one region of action of the temperature-controlling arrangement.

Abstract: A presetting system (100) is disclosed for accurately presetting the position of a tool (106) within a shrink-fit holder (148). The presetting system (100) includes a presetter measuring device (102) which is adapted to provide an initial length measurement of the tool (106), and verification of the preset position of the tool (106) within the shrink-fit tool holder (148). The system (100) also provides for incorporating a temperature compensation factor within the presetting process, for compensating for temperature and dimensional changes of the tool (106) during heating processes.

Abstract: The present invention provides a tool assembly unit for coupling a tool and a tool holder including a measuring device which determines the position of the tool with respect to the tool holder, an alignment device coupled to the measuring device which receives the tool holder, a moveable rod slideably disposed on the alignment device and coupled to the tool which moves the tool with respect to the tool holder to a desired position as measured by the measuring device. The tool may be affixed to the tool holder by heat shrinking.

Abstract: A tool, in particular a shaft tool, is inserted into and fixed in a clamping chuck. The actual position of the tool, particularly in the direction of the longitudinal axis of the tool or in the direction of insertion, is determined before and/or during the insertion of the tool into the clamping chuck. Based on the determined actual position, the tool is inserted into the clamping chuck until a setpoint position has been reached.

Abstract: Form-transmitting clamping of a tool with a shaft in an opening of the tool receptacle by shrinking with heating and cooling and adjustment of an axial insertion depth of a shaft in an opening of the tool receptacle, the method includes placing a movable contact piece on a free end of a tool for positioning the tool coaxially to the tool receptacle, clamping the tool between the contact piece on the one hand and a counterforce which acts opposite on the tool and oppositely to an insertion of the tool in the opening of the tool receptacle on the other hand before starting a heating, retaining the shaft clamped during the heating, and stopping the heating after reaching a predetermined nominal value during insertion of the shaft in the opening of the tool receptacle.

Abstract: Form-transmitting clamping of a tool with a shaft in an opening of the tool receptacle by shrinking with heating and cooling and adjustment of an axial insertion depth of a shaft in an opening of the tool receptacle, the method includes placing a movable contact piece on a free end of a tool for positioning the tool coaxially to the tool receptacle, clamping the tool between the contact piece on the one hand and a counterforce which acts opposite on the tool and oppositely to an insertion of the tool in the opening of the tool receptacle on the other hand before starting a heating, retaining the shaft clamped during the heating, and stopping the heating after reaching a predetermined nominal value during insertion of the shaft in the opening of the tool receptacle.

Abstract: A device is disclosed for setting the shank of a rotary cutting tool in a throughbore of a heat shrink fit tool holder so that the rotary cutting tool is at the same position as the shank of a reference cutting tool positioned in the throughbore of a reference holder. The device comprises a housing having a first station and a second station laterally spaced from the first station. A reference is positioned at the first station while a second fixture adapted to receive the tool is mounted to the housing at a second station. A first rod is movably mounted to the housing along an axis aligned with the reference tool and a second rod is movably mounted to the housing and aligned with the second fixture while a crossbeam is secured to the first and second rods so that the rods move in unison with each other. The crossbeam and rods are moved upwardly until the first rod abuts against the bottom of the reference cutting tool.

Abstract: According to known methods for producing a composite element from a truncated cone-shaped, fire-proof ceramic insert which is enclosed by a metal jacket, the outer jacket is-heated separately and shrunk on the cold ceramic insert. Alternatively, after inductive heating of the outer jacket the ceramic insert, which is heated at the same time, is positioned in the metal jacket using a mechanical device. The invention aims to provide a new method which avoids the disadvantages associated with shrinking a separately heated hot metal jacket on to a colder ceramic insert and to provide a simple method which without inductive heating of the metal jacket and the use of mechanical devices for joining said jacket to the ceramic insert achieves an even bond between the metal jacket and ceramic insert.

Abstract: In order to remove a plate made from a material that can be heated by electromagnetic induction and retained on a supporting member by a heat-fusible adhesive, an inductor is displaced facing at least one strip of the plate in order to heat the strip by induction and heat the adhesive by conduction until the adhesive softens, and a tearing tool is driven so as to tear out the heated strip by hot-peeling. The inductor and the tearing tool are displaced jointly relative to the plate and the supporting member by means of a mobile frame, which is displaced on a stationary frame on which the supporting member and the plate are fixed.

Abstract: The pieces to be reciprocally connected are mechanically manufactured with tolerances such that the external diameter of the ends of the pipes (6,6′) is suitably greater at the internal diameter of the seat ends of the star cross pieces (1). The star cross pieces are heated to a temperature which does not provoke a permanent deformity in the pieces and which is such as to slightly increase the diameter of the their seats. The pipes are inserted instead into the ends to be connected, in a liquid nitrogen bath that properly contracts the external diameter of said ends and brings them substantially to a condition of equality or inferiority with respect to the diameter of the dilated seats and the ends of the star cross pieces. The cooled ends of the pipes are then inserted into the heated end of the seats of the cross pieces and when the pieces return to room temperature, they are connected with the foreseen tightness.

Abstract: A method and apparatus for loading deposit material, such as an embolic coil, into a shape memory polymer (SMP) gripping/release mechanism. The apparatus enables the application of uniform pressure to secure a grip by the SMP mechanism on the deposit material via differential pressure between, for example, vacuum within the SMP mechanism and hydrostatic water pressure on the exterior of the SMP mechanism. The SMP tubing material of the mechanism is heated to above the glass transformation temperature (Tg) while reshaping, and subsequently cooled to below Tg to freeze the shape. The heating and/or cooling may, for example, be provided by the same water applied for pressurization or the heating can be applied by optical fibers packaged to the SMP mechanism for directing a laser beam, for example, thereunto. At a point of use, the deposit material is released from the SMP mechanism by reheating the SMP material to above the temperature Tg whereby it returns to its initial shape.

Abstract: A system for recycling the components dismantled from a disused automobile, which includes a main body having a control part, front and rear glass removers connected with the main body for dismantling the glass from the body of the disused automobile, two molding removal systems connected to the glass remover for removing the molding which connects the glass to the body of the automobile, and a moving apparatus for removing the molding which connects the glass to the body of the automobile, and a moving apparatus for moving the main body in all directions and controlling the position of the main body to the automobile. The windshield glass and the rear glass are automatically dismantled from the disused automobile before compression of the body of the automobile.

Abstract: A device for assembling and disassembling a tool with a tool holder, such as particularly a mandrel. The device is essentially constituted by a support frame (4) provided with a unit (5) for receiving and holding a tool holder (3), elements (6 and 7) for ensleeving and extracting a tool (2) coacting with an induction heating unit (8) for the portion (3′) of the tool holder (3) adapted to receive the tool (2) by ensleeving.

Abstract: A hockey stick blade tool comprises a base and a pair of clamp assemblies mounted to the base. One clamp assembly is fixed to the base with the other being movable along the base length. To remove a blade, the shaft of a hockey stick is clamped in the fixed assembly and the blade is clamped in the movable assembly. The movable assembly is translated along the base in a direction away from the fixed clamp assembly to withdraw the blade from the shaft. The base also includes provision to provide heat during blade removal. The base has a pivotal cover which encloses the joint area between the blade end and the shaft end. A source of heat can be directed underneath the cover to heat the joint area to facilitate blade removal.

Abstract: A fibre optic bundle end is produced by placing the end in a ferrule (6) and the bundle (14) and ferrule (6) are supported in a furnace (22) for rotation about the ferrule axis. The ferrule (6) and the fibres (14) therein are heated and while still in the furnace (22) are radially compressed by compression members (2,4) so that the fibres become lightly packed, after which the protruding fibre ends are cut off and the cut surface (16) is polished. The compression is achieved by rotating the ferrule (6) and fibres (14) back and forth about the bundle axis while the compression members which are bars passed through the furnace (22) move together radially of the ferrule (6), the said members being mounted for reciprocation so as to allow the ferrule (6) to roll thereon as it rotates.

Abstract: A catalytic converter structure comprising: cylindrical catalyst substrate; a first cylindrical tube covering a first end of the substrate; a second cylindrical tube covering a second end of the substrate; a support mat surrounding a central portion of the substrate and portions of the first and second cylindrical tubes; and a housing having a cylindrical shape, within which the substrate, first and second cylindrical tubes and the support mat are located, wherein the housing has a central body and first and second housing ends, wherein the housing ends each have a first diameter less than a second diameter of the central body, wherein the first and second housing ends engage the first and second cylindrical tubes, respectively. The structure requires few components, is easy to tool and easy to adapt to different engine implementations.

Abstract: The invention indicates a device and a process for clamping tools in a clamping chuck which possesses a shrinkage segment (14) to receive the tool, with a heating apparatus (26), preferably designed as a gas burner, being associated with the shrinkage segment (14). The tool is clamped in the clamping chuck (20) with a press fit in the shrinkage seat, resulting in especially high clamping force. To prevent local overheating of the clamping chuck (20) and achieve complete insertion of the tool shaft into the thermally expanded shrinkage segment (14) of the clamping chuck (20), a receiving apparatus (40)--by means of which, for clamping purposes, the tool can be elastically pressed in the axial direction against the shrinkage segment (14)--is provided to receive the tool.

Abstract: An apparatus for attaching a shrinkable tubing to a surgical needle and a heat labile suture is provided. The apparatus includes a mechanism for desensitizing the tip of the heat labile suture along with a mechanism for situating a shank portion of the needle and the tip of the suture within the heat shrinkable tubing. The apparatus also includes a device for applying energy to the shrinkable tubing to effect attachment of the needle and the suture.

Abstract: An internal induction coil is used to heat the rotor of an ECM. This provides a localized heating and dilation of the bore of the rotor prior to the heating of the outer surface of the rotor. The crankshaft is located in the heated bore and acts as a heat sink. As a result, the outer surface of the rotor is not heated such as might cause the loss of magnetic properties.

Abstract: Ceramic-metal composite bodies and a process for the production thereof are disclosed. The ceramic-metal composite body includes a metallic member and a ceramic member which are integrally joined together by fitting a projection formed on the ceramic member to a recess formed in the metallic member. The projection of the ceramic member is fitted and joined into the recess of the metallic member in a vessel of which the inside is kept at an atmosphere having a pressure lower than an atmospheric pressure. The pressure of air remaining in a space left between the recess and the fitted projection is lower than that of the air in the space when the projection is fitted into the recess in the atmospheric pressure.

Abstract: A rolling cutter (24) for a rotary drill bit (10) having cutting inserts or elements (52) mounted within sockets (54) in a so-called full shrink process. The rolling cutter (24) is heated to a temperature over around 500.degree. F. in a controlled inert atomsphere in an enclosed heat chamber (71) and the inserts (52) are positioned by gravity within the sockets (54) in a slip fit for retention in an interference fit by shrinkage of the cutter body (25).

Abstract: A method and apparatus for securing one or more parts, each of which is provided with an opening, to a hollow member. In the starting state, the inner diameter of the opening of the parts is greater than the outer diameter of the surface provided on the hollow member for securing the part. The parts are placed in the prescribed position on the hollow member prior to the securing operation. In order in a simple and economical manner to reliably secure the parts to the hollow member without the danger of overstressing the latter, and without the danger that the parts will loosen, a temperature difference is produced, prior to placing the parts on the hollow member, by heating the parts and/or by cooling the hollow member. Subsequently, each part is secured to the hollow member by widening the latter at least in the securing regions thereof, and by a subsequent shrink fitting of the parts onto the hollow member as a consequence of the temperature equalization that occurs.

Abstract: The method for removing a head portion with a shank section from a shaft of a golf club is effected by an assembly comprising securing means for fixing the position of a shaft of the golf club along the longitudinal axis of the shaft. Head grasping mechanism is mounted to rotate with respect to the securing mechanism and the longitudinal axis of the shaft secured in a fixed position. The head grasping mechanism is effective to hold the head during rotation thereof, thereby turning the head about an axis of rotation. Drive mechanism rotates the head grasping mechanism about the axis of rotation while applying pressure to the head in a directon parallel to the longitudinal axis and away from the fixed shaft. The method includes the step of heating the outer surface of the hosel section of the head portion for expanding the material therein with respect to the shaft. After the heating step, the pressure is applied to the head while the head portion is still heated.

Abstract: An apparatus for inserting stencil ferrules into the ends of a screen printing cylinder comprising chamber means, having a floor and a ceiling; base means secured within the chamber means and adaptable to releasably support a first stencil ferrule which engages one end of the screen printing cylinder; pivoting guide means positioned concentrically above the base means by a longitudinally adjustable support means, the guide means being adaptable to releasably support a second stencil ferrule which engages the other end of the screen printing cylinder, the support means being secured within the chamber means; means for supplying a heated fluid to the chamber means; and means for evacuating the heated fluid from the chamber means.

Abstract: A method of interference-fitting either a male or female resilient member to its corresponding female or male member using a hollow mandrel cooled to preferably cryogenic temperatures which freezes a compressed resilient member to at least its glass-transition temperature. The method enables one to combine the two members before the resilient member warms to a temperature above its glass-transition temperature. The method and apparatus have found usefulness in the assembly of elastomeric high voltage electrical insulators.

Abstract: A turbine rotor disassembly, handling and reassembly apparatus employs a feedback-controlled electric heating oven to rapidly heat a turbine wheel while the rotor shaft is in the horizontal position. An adapter interfaces the wheel to a handling spool whose outboard end is adjusted to slide on the rotor shaft and to provide a fulcrum for supporting the wheel. A handling trolley includes a soft hydraulic system for supporting the weight of the wheel to avoid damaging the precision machined surfaces of the shrink-fit area while the wheel is being withdrawn. The handling apparatus also provides means for upending, or rotating, the removed wheel through 90 degrees to place its axis vertical for facilitating handling. A sensor system senses a radial motion of the wheel to detect clearance and to establish an appropriate fluid pressure to just balance the weight of the wheel and attached parts. The handling system includes means for rotating the wheel slightly during reassembly to align keyways or the like.

Abstract: A method of interference-fitting either a male or female resilient member to its corresponding female or male member using a hollow mandrel cooled to preferably cryogenic temperatures which freezes a compressed resilient member to at least its glass-transition temperature. The method enables one to combine the two members before the resilient member warms to a temperature above its glass-transition temperature. The method and apparatus have found usefulness in the assembly of elastomeric high voltage electrical insulators.

Abstract: A fixture for supporting a sleeve and induction coil which encircles the sleeve to facilitate removal and replacement of shrunk-on sleeves on a shaft, the fixture having upper and lower portions electrically insulated from each other and standoff insulated studs and pads which support the sleeve and induction coil within the fixture to minimize circulating currents in the fixture and heating of the fixture.

Abstract: A tool for installing shrink fit parts formed of a material which is dimensionally stable over a wide range of temperatures having a locating surface on which a part to be shrunk is clamped and having a chamber adjacent the locating surface, which is filled with a cooling media as the part is being shrunk in a source or vat of cooling media, to maintain the part in its shrunken condition after removal from the cooling media. A valve is provided for removing the cooling media from the chamber after the shrunken part is positioned precisely in a second part so that the shrunken part will warm and expand into the second part to form a shrink fit therewith.

Abstract: A bearing sleeve extractor assembly includes a movable workpiece support on a stand having an overhead circular spray head to receive a multi-surfaced elongated bearing sleeve connected to a support member and wherein the spray head includes a perforated inner wall and an insulated outer wall having a heated vapor chamber therebetween connected to a heat source for directing heated vapor into the spray head for distribution therefrom to produce even convection heating of the bearing sleeve continuously circumferentially therearound so as to produce a non-mechanical thermal release of the bearing sleeve from its support member.

Abstract: Casting ladle gate valves of the type which are designed to be installed and removed from the ladle as a unit, are rebuilt in a work area which includes a disassembly station, a first assembly line including a revolving table for renewing the movable slide parts and a second assembly line including a revolving table for renewing the slide housings, and reassembling the slide parts, slide housings and clamping lids into renewed gate valve units. By preference, the disassembly station, both revolving tables and a conveyor for carrying the units to the work area from the foundry or steel work, and back are served by a slewing crane.