The method of connection of the cover fuel assembly with end pieces
(57) Abstract:Usage: Assembly production. The inventive seat hidden under the screw head to perform plastic deformation of the forming punch after centering holes in the part and the case with forming punch, in case perform an additional opening through which produce kontrolka screw after it is installed in the screw hole by welding to the end of the part. Part of the additional holes have on its seat under countersunk head screws in the cover and the part on the plane face of the cover. A seat under the countersunk head of the screw is performed in two transitions, first to a depth that allows you to install the end piece in the case, and the second at the full depth after installation, the end parts in the case, with an extra hole combined with the main. 2 C.p. f-crystals, 4 Il. The invention relates to the production Assembly, in particular the production of nuclear engineering and is intended for use in the production of active zones of nuclear power reactors.There is a method of connection of the cover fuel Assembly with end pieces, including the issue is th place under countersunk head screw, installation of end parts in the case, the centering holes in the part and the cover, the securing end parts in case the setting in their hole screws with countersunk head, centering hole forming punch having inside the through channel using a guide rod which is included in the hole and channel punch.The disadvantages of this method are as follows: because as tooling for moulding in the case of seats under the screw heads used stamp, mounted on standard extrusion equipment, it is not guaranteed that the accuracy of the matching punch and die and seats in the tail part, which leads to the appearance of gaps and possible destruction of the joints from vibration during operation of the device;
insecure connection because of vibrations during operation, the screws turn away due to the lack of their securing.The technical result of the invention is to increase reliability and decrease of metal construction.This technical result is achieved in that the connection of the cover of the fuel Assembly with end pieces, including the execution in the end part of the threaded resp the free end parts in the case, the centering holes in the part and the cover, the securing end parts in case the setting in their hole screws with countersunk in the cover seats for countersunk head screws perform plastic deformation of the forming punch after centering holes in the part and the case with forming punch, while in the case perform an additional opening through which produce kontrolka screw after it has been installed in the holes by welding to the end of the part.Part of the additional holes have on its seat under countersunk head screws in the cover and the part on the plane face of the cover, because if you make additional holes in the case, connected with the main, you receive the instability of the process of forming seats for the screw head in case of a break in the limit cone seats under the screw head, because you receive the uneven impact of reactive forces on the punch, which in turn creates a bending moment on guide rod plug. The bending of the working rod leads to a loss of precision movement of the punch and, in the worst case, breakage of the rod.To address this untill the are two transition first in depth, allowing you to install the end piece in the case, and the second at the full depth after installation, the end parts in the case.As a result, after installation, the end parts in the case and guide rod installed in a forming punch, despite the presence of the aperture, a case of rupture, the force distribution along the perimeter of the punch, especially at the initial time of molding becomes more uniform and decreases in absolute value.According to the invention in the particular case, some additional holes can be performed on the seat under countersunk head screws in the cover and the part on the plane face of the cover, i.e., between the two holes in this case will be a jumper that will eliminate the uneven impact of reactive forces on the other one and thus guide rod will not bend. In this case disappears and the need for two-step execution of the seat in the case.In Fig.1 - the end piece mounted in the case with seats under the screw head after the first stage of formation; Fig.2 - the same, top view; Fig.3 - terminal part mounted in the case in which between the primary and secondary hole at back the b connection terminal parts 1 case 2 is as follows. At the end of part 1, carry out the screw hole 3 with a mounting seat 4. In case 2 perform the hole 5 and an extra hole 6. An extra hole 6 may be connected with the main hole 5, as shown in Fig.1 and 2. Before forming seats 7 in case 2 carry out the centering holes 3 in the end of part 1 and the holes 5 in the case 2. Centering is carried out, for example, using a guide rod, which is included in the design of the forming punch used when performing seats 7. The centering holes in the case and the terminal parts with forming punch enables the manufacture of coaxial holes and seat the cover and eliminate any slack in the connection. Perform additional holes in the cover 2 is necessary for securing the screw after installation. Once implemented centering holes 3 and 5 with forming punch, the last as you move makes mounting slot 7 under countersunk head 8 of the screw 9 for the two transitions. When the main 5 and an additional 6 holes are connected, the first forming punch shapes in the plastic bowl depth, allowing you to install the end piece 1 in case 2 (see Fig and 5 and 6 there is a crosspiece 10, the shaping footprint exercise for one transition. After formoobrazovanie seat 7, are installed in holes 3 and 5 of the screw 9 flat head 8, which through an extra hole 6), for example, by welding 11 with end pieces, which eliminates the loosening it with vibrations. 1. The METHOD of CONNECTION of the COVER FUEL ASSEMBLY WITH END pieces, including the execution in the end part of the threaded holes of the mounting seat, the execution in case of holes and seats for countersunk head screws, install the end parts in the case, the centering holes in the part and the cover, the securing end parts in case the setting in their hole screws with countersunk head, characterized in that the execution in case seats for countersunk head screws perform plastic deformation of the forming punch after strirovaniya holes in the part and the case with forming punch, while in the case perform an extra hole, through which produce kontrolka screw after it is installed in the screw hole by welding to the end of the part.2. The method according to p. 1, characterized in that a part of the additives of the case.3. The method according to p. 1, characterized in that a seat under the countersunk head of the screw is performed in two transitions, first to a depth that allows you to install the end piece in the case, and the second at the full depth after installation, the end parts in the case, with an extra hole combined with the main.
FIELD: repairing equipment of shops, namely of locomotive depots of railway road transport vehicles.
SUBSTANCE: movable installation includes lifting table having lower wheeled platform and jointly mounted on it upper stand; mechanism for lifting and descending said stand; power hydraulic cylinder mounted on upper stand and communicated by means of hydraulic lines through control unit with high-pressure pump system; clamping device for mounting-dismounting bearing assemblies. High pressure pump system includes tank, pump aggregate, draining pipeline, suction pipeline connecting inlet of pump aggregate with tank. Lifting and descending mechanism is in the form of hydraulic cylinder and it is mounted on lower platform. Pump aggregate is arranged on upper lid of tank and it is in the form of displacement hydraulic pump with electric motor. Filter is mounted in suction pipeline. Control unit is in the form of body having two built-in safety valves, tap distributor and built-in non-return valve. Manometer and additional filter connected with draining pipeline and having pouring hole are connected with control unit. Hydraulic lines are in the form of flexible hoses. Installation is provided with additional power hydraulic cylinder that forms together with connected in parallel main hydraulic cylinder unit of power hydraulic cylinders. Said unit of power hydraulic cylinders is placed on supporting sheet-plate mounted on upper stand with possibility of rotation or removal from upper stand and with possibility of moving in range of length of flexible hoses. Similar cavities of hydraulic cylinders are mutually communicated. Clamping device includes movable and stationary plates mounted respectively on rods and back lids of hydraulic cylinders and designed for joining tie rods of attachment.
EFFECT: enhanced reliability, no-failure operation of installation.
FIELD: assembling of precise units of instruments by pressing-in with use of calibrated effort, by riveting and expanding with use of precession tool.
SUBSTANCE: press includes П-shaped housing; adjustable table mounted in struts of housing and fixed to said struts by means of pins; power hydraulic cylinder with axial motion of rod; rotation drive of precession head; pumping station of hydraulic drive unit. Rotation drive of precession head includes electric motor and belt transmission. Power hydraulic cylinder is rigidly mounted on cross piece of housing and it carries plate on end of spring-loaded rod. Said plate supports two plungers spaced in parallel relative to axis of rod and spring-loaded relative to housing. Pulleys of belt transmission of rotation drive are mounted in casing. The last is secured to plate in such a way that driven pulley is mounted on spindle coaxially relative to rod of hydraulic cylinder and driving pulley is mounted on the same axis as shaft of electric motor placed in cross piece of housing. Driving pulley and shaft of electric motor are kinematically joined by means of other shaft whose one end is mounted in shaft of electric motor and whose other end is joined by means of sliding dowel with opening of supporting axle of driving pulley. Spindle of driven pulley is joined with precession head.
EFFECT: improved design providing enhanced rigidity and working accuracy of press.
FIELD: mechanical assembling procedures, namely equipment for assembling aggregates of caterpillar transport vehicles, for example semiautomatic machines for assembling caterpillar tracks.
SUBSTANCE: in apparatus for assembling chain stop plate is mounted in such a way that its working surface is arranged in plane normal relative to pressing in plane. Upper non-working portion of stop plate at side of ending pressing-in cycle is inclined in horizontal plane to side from rotor type conveyer. Lower non-working portion of plate in vertical plane is inclined relative to vertical line to side from rotor type conveyer. Stop part of pusher exceeds diameter of head of pin. Rigid guides are arranged in plane parallel to pressing-in plane; said guides are in the form of roller tables with pitch between rollers of roller table less than pitch of chain links. Guides embrace upper branch of conveyer from downwards and branch of chain from upwards at least along the whole length of it. Drive unit is provided in addition with back-stroke mechanism. Splitter is in the form of plate that is jointly mounted in its mean portion along lateral sides on supporting surface in horizontal plane along motion direction of conveyer for moving pins and it forms two-arm lever. One end of said lever is spring-loaded from downwards with possibility of engaging with dents of conveyer for moving pins. Other end of said lever is Г-shaped one and it may engage by free end with pins on inclined trough. Horizontal axes of articulation joints in vertical plane are provided with holding levers rigidly joined with plate and mounted with possibility of engaging with pins on inclined trough.
EFFECT: enlarged manufacturing possibilities, enhanced operational reliability.
FIELD: mechanical engineering.
SUBSTANCE: mandrel has guide, working part made of deformable teeth, calibration parts, and diverging groove made in the guide and working parts. The expanded end of the groove is in coincident with the origin of the guiding part. The groove that ends at the last deformable tooth of the working part has radius-shaped cross-section.
EFFECT: enhanced quality of the press joint and expanded functional capability.
FIELD: machine engineering, namely equipment for dismounting press-fit joints, possibly restoration of electric machines.
SUBSTANCE: apparatus includes housing with platforms for horizontal and vertical motions. Part to be dismounted is placed on horizontal motion platform and it is fed to stripping mechanism. The last is joined with vertical motion platform by means of fastening members and it is provided with adjusted grips supporting heating members with possibility of their axial movement. Heating members are in the form of nozzles for alternating feed of hot and cooled air.
EFFECT: reduced axial errors between dismounted part and stripping mechanism, lowered efforts for stripping parts.
5 cl, 5 dwg
FIELD: mechanical engineering.
SUBSTANCE: device comprises the mechanism for locking pressed parts made of an extensible sleeve. The first power hydraulic cylinder is used for moving parts and can rotate between two vertical unmovable pillars. The pillars are pivotally connected in pair with movable vertical pillars through the top and bottom horizontal clamps. The extensible spring-loaded stop with the drive and the first hydraulic cylinder are axially aligned. The first power hydraulic cylinder receives the second power hydraulic cylinder whose rod is provided with first center and spring. One end of the spring co-operates with the piston, and other end of the spring co-operates with the face of the extensible sleeve. The extensible stop receives the second center with the stack of plate springs that is coaxial to the first center. The bottom clams are provided with a lifting-rotating device.
EFFECT: reduced labor consumption for making and simplified structure.
1 cl, 2 dwg
FIELD: devices designed for simplifying procedures of assembling/disassembling units.
SUBSTANCE: crank stripper includes cross piece 1 supporting power mechanism in the form of one-way telescopic hydraulic cylinder 2 having thrust rod 3 for shaft of crank 14; mechanism for forced closing of foots having cylindrical discs 8, 9, paired plates 10 and double-arm levers 4,5. One arm is used for engaging with crank; other arm of is cone one and it may rest upon lateral surface of cylindrical disc secured to lateral side of cross piece. Double-arm lever whose arms are mutually inclined by obtuse angle is jointly mounted through paired plates in center of disc. Articulation joint of lever is mounted in edge portion of second lever arm on line of inner surface of first lever arm.
EFFECT: intensified clamping of part by foots, enhanced efficiency, lowered cost price of working operations.
FIELD: mechanical engineering.
SUBSTANCE: method comprises gripping the part to be dismounted and applying axial load by means of at least two ties and, e.g., hydraulic cylinder. The rod of the hydraulic cylinder cooperates with the face of the shaft. The ties are interconnected via a plate opposite to the end of the part to be dismounted. Each of the ties is provided with the eccentric groove. The ties are set in the openings in the part to be dismounted for permitting engagement by their step defined by the eccentric groove. Between the wall of the opening of the part to be dismounted and each tie is sickle-shaped bushing member. The hydraulic cylinder abuts against the plate so that to provide relationships D1 ≤ D2, b ≥ H, e = h, where D1 is the outer diameter of the tie, D2 is the diameter of the opening in the part to be dismounted, b is the width of the eccentric groove, H is the thickness of the part, e is the eccentricity of the groove with respect to the axis of the tie, and h is the maximum thickness of the sickle-shaped bushing member.
EFFECT: expanded functional capabilities.
1 cl, 2 dwg
FIELD: machine engineering, namely mechanical strippers.
SUBSTANCE: stripper includes traverse bar with grips, screw having two outer threads with different pitches; main detachable sleeve mounted by thread whose pitch is less than that of said screw; additional threaded sleeve mounted by second thread of said screw; holder embracing both sleeves, fixed relative to them in angular direction and resting by its inner shoulder upon end of main sleeve. Inner shoulder is formed on one end of holder; other open end of holder is arranged in through opening of traverse bar and it is rigidly joined with said bar. Threads of powerful screw have similar sign; additional sleeve has outer flange spaced from open end of holder by interval determined according to relation K = B1(H2/H1 - 1), where K - interval between outer flange of additional sleeve and open end of holder; B1 - displacement (caused by main sleeve) of part stripped by means of stripper; H2 - thread pitch of additional sleeve; H1 - thread pitch of main sleeve. Sleeves are mutually spaced by interval T exceeding value of mutual convergence of sleeves.
EFFECT: simplified usage of stripper.
FIELD: railway road machine engineering, possibly repairing of railroad machines.
SUBSTANCE: press includes frame having base and two struts mutually joined by means of two columns; working cylinder mounted on one of said struts; force and supporting traverse bars with rollers. Said traverse bars are arranged between struts of press frame and they are mounted with possibility motion on rollers along columns of power frame. Force traverse bar is mounted with possibility of fixing it to columns.
EFFECT: enlarged manufacturing possibilities, improved quality of combining wheel pairs, simplified design of press.