Abstract: The present invention relates to a guiding and centering device (10) for a forming tool (2), in particular an injection molding or die-casting tool, comprising a first mold half (1) and a second mold half (5) which are guided by guide means (7) from a closed position in which the respective separating surfaces of both mold halves (1; 5) are pressed against one another into an opened position and vice versa. This guiding and centering device (10) comprises a protruding guiding body (4) formed as a circular cylindrical bolt (12) provided at the first mold half (1), a guiding recess (6) formed as a bush (14) with an circular cylindrical inner surface (20) provided at the second mold half (5) and a rolling element cage (16) with rolling elements (17) inserted in rows (18), by means of which the two mold halves (1; 5) are guided and precisely centered in the closed position.

Abstract: The measurement apparatus includes an outer cylinder, a shaft body longitudinally movable on the inner surface side of the outer cylinder, a plurality of bearing balls disposed between an inner surface of the outer cylinder and an outer surface of the shaft body, and a measurement part that measures a relative position between the outer cylinder and the shaft body, and a first density of the bearing balls in a first area having a first length shorter than a total length of the outer cylinder in a longitudinal direction from one end of the outer cylinder is larger than a second density of the bearing balls in a second area having a second length shorter than the total length of the outer cylinder centered on a center position in the longitudinal direction of the outer cylinder.

Abstract: A carriage assembly includes a housing having first and second pieces each defining a recess that has a bearing surface with raised dimples. The first and second pieces are assembled to each other such that the recesses are aligned to form a cylindrical hole. A bushing is received in the hole and has an outer surface disposed against the dimples of the first and second pieces. The dimples are deformed during assembly to secure and locate the bushing within the cylindrical hole.

Abstract: Lifting column, preferably for height adjustable tables, said lifting column comprising at least two relative to each other telescopically arranged members (2a, 2b, 2c). At least one slider (11) is arranged between the two members (2a, 2b, 2c), said slider being secured to one of the members (2b). The problem is play between the members (2a, 2b, 2c), resulting in an unstable lifting column. For solution of this problem the member (2b) to which the slider (11) is secured, is furnished with a resilient section (17) outlined by a groove (16, 18) against which at least a part of the slider (11) rests. The resilient section (17) can push the slider (11) into firm engagement against the two members (2b, 2c), at which a stable lifting column which is free from play is achieved.

Abstract: It comprises several centering elements (1) arranged on the sides of a mold, wherein each one of them comprises a male device (3) screwed to a first portion (4) of the mold and a female device (6) screwed to a second portion (7) of the mold, being both portions (4-7) fastened to a fixed plate (8) and to a moveable plate (5) of an injection machine. It is characterised in that a through hole (11) of the female device (6) incorporates at least two parallel planes delimited by at least two groups of revolving bodies located in guiding housings, which have a closed contour, and through which the revolving bodies travel with an endless motion, in simultaneous combination with a spinning motion of said revolving bodies, while the elongated shafts (10) of the male device, move inside the through holes (11), said shafts contacting tangentially against some of the aforementioned revolving bodies.

Abstract: Apparatus including a collar for aligning opposing first and second tool sections such as mold halves during closing of the tool sections and a tool utilizing same are provided. Each apparatus includes a projection such as a solid pin integrally including a frustum-shaped tapered portion and a cylindrically-shaped guide portion. The apparatus further includes a bushing having an upper surface and a central opening with internal contours which are complementary to outer contours of the guide portion. The collar has a lower surface and a central opening which is aligned with the central opening of the bushing when the collar is mounted at a predetermined position on the bushing with the upper and lower surfaces in abutting engagement. The collar opening has internal contours which are complementary to outer contours of the tapered portion. The tapered portion of the projection and the collar guide and direct the tool sections into alignment as the tool sections close.

Abstract: A composite anti-friction bearing structure comprising a bearing substrate and an anti-friction layer. The bearing structure can be in the form of bushings, wear plates, wear rings, etc. The anti-friction layer includes particles of an alloy which combines lubricity of molybdenum with the wear resistance and corrosion resistance of elements such as cobalt and nickel. The invention is particularly related to anti-friction bushings for use in die sets, presses and other heavy duty machinery.

Abstract: A mold guiding device includes a tube having a hole in an end thereof and a threaded recess is defined in an inner end of the hole. A positioning member and a first end of a sleeve are inserted in the hole in sequence. A rod extends through the passage of the sleeve and the central hole of the positioning member and is threadedly engaged with the threaded recess in the tube. The diameter is the same as the sleeve when the sleeve is positioned in still, and is movable when the diameter of the positioning member is smaller than the passage of the sleeve.

Abstract: A holding device for a cage for roll bodies of longitudinal leaders on pillars of a tool, in particular a blanking or punching die or a mould, the tool consisting of a plurality of assembled plates, and having at least a first part and a second part. The holding device comprises a holding part which includes a hollow cylindrical rod, held displaceably in a longitudinal bore made on the free end of each pillar. Said rod is provided on its face with a disk projecting beyond the circumference of the pillar. Also inserted into the longitudinal bore is a screw. Provided on the shank of said screw is an elastic element over which an annular element, inserted into the hollow cylindrical rod, is pushed when the holding part is in pushed-in position. The elastic element holds the annular element in this position in a firmly clamping fashion.

Abstract: The present invention provides a material forming tool, such as a sheet metal stamping die, having a polymer matrix and filler material mixed therein. The filler material is a plurality of microspheres which are coated with a release agent. The coating of the release agent should be sufficient to allow the microspheres to rotate in the polymer matrix when the tool is used to form material.

Abstract: In combination, a guide post, a coaxial ball bearing cage adjustably receiving the guide post and adapted for longitudinal and rotary movements. A coaxial guide sleeve upon a support adjustably receives the cage and post. A coiled spring within the sleeve is mounted upon the support and yieldably supports the ball cage. An apertured cap upon the sleeve loosely receives the cage and has an inlet adapted for connection to an air source. Pressurized air is directed into the cap for angular impingement upon the cage for rotating the cage relative to the sleeve. As a modification the spring is replaced by a pressurized air source.

Abstract: A sliding bearing assembly for a press die set includes a guide post having at least two external grooves disposed parallel to the post axis, each of which has two flat surfaces oriented at 90 degrees to one another. A guide bushing is slidably mounted on the post by guide blocks and a retainer assembly. The guide bushing includes a number of guide blocks equal to the number of grooves in the guide post, and each has a groove opposed to a corresponding groove in the post. The retainer assembly, which is positioned within the guide bushing, includes at least two cross roller bearings, one for each groove on the guide post, mounted on a generally circular frame. The roller bearings are mounted on the frame with the axes of the rollers at such an angle relative to the plane of the frame that the rollers run along the aligned opposed grooves in the guide post and guide blocks.

Abstract: A stroke bearing is able to perform relative motion along a prescribed path by itself without requiring the providing of a stopping device that prevents a ball and cage assembly from falling out on the apparatus. In a stroke bearing having an outer sleeve and a shaft fit together by means of a ball and cage assembly, by, for example, fitting a bushing into said outer sleeve, providing a guide groove on this bushing, and having a pin make sliding contact with said guide groove, said stroke bearing is able to perform relative motion along a prescriber path. In addition, the ball and cage assembly can be easily prevented from falling out by a stop ring acting in the manner of a range limiting device that limits the range of said relative motion.

Abstract: A guide post, guide sleeve, and ball bearing assembly especially for a die set has a leak proof seal contained within one end of the guide sleeve for slidably sealing the interface between the guide post and guide sleeve and slidingly cleaning the surface of the guide post during relative reciprocal movements of the guide post and guide sleeve. The assembly maintains optimal lubrication of the ball bearing assembly while providing a cleaner, more frictionless configuration.

Abstract: Apparatus for restoring a turret table toolholder guide station. The apparatus comprises a plurality guide rings each comprising precisely molded or machined inner and external circumferential surfaces, one guide ring being installed into each of the channels. Each guide ring has a portion of the ring circumference removed for facile, snap-in installation, but each guide ring retains a sufficient portion thereof that a toolholder inserted for guidance in the station is in substantially continuous, precise toolholder guiding contact with the inner circumference of the guide ring.

Abstract: A guide post has a ball bearing cage adjustably mounted thereon. An annular stop within the cage registers with an annular snap ring secured around a portion of the guide post limiting relative longitudinal movements of the cage and post, with the cage free for rotary adjustments relative to the guide post. A guide sleeve axially receives the guide post and sleeve with the cage rotatable relative to the guide post and sleeve when the cage and sleeve are separated. The guide post and sleeve are projected into and secured to the relatively movable die shoes of a die set assembly.

Abstract: An electromagnetically-driven punch press having adjustable anti-skid supports for the ball bearings and ball cages of the ball-bearing bushings which carry the movable tool for preventing downward skidding of these balls and their cages when the moving tool punches down against the work material. Adjustable resilient cushioning arrests tool travel for minimizing "tool whip" and tool wear at the end of the work stroke.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage having a bore adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular open top recess in said cage inwardly of one end terminating in an annular flange defining a stop shoulder. An apertured swivel cap is mounted upon the guide post and includes a shank extending into the cage recess. An annular detent on the shank is interlocked with the stop shoulder. A guide pin is threaded through the cap and into the guide post slot and is loosely and slidably registerable with side walls of the slot. The pin traps the cap upon the guide post for longitudinal movements. The cooperating stop shoulder and detent retains the cage upon the cap but for free relative rotary movements.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular open top recess in the cage inwardly of one end. A truncated roller bearing with opposed hemispherical surfaces and opposed flat sides is guidably positioned within the slot with the roller bearing maintaining a rolling point contact with the bottom wall of the slot and with the roller flat sides loosely and slidably registerable with the side walls of the slot. A hemispherical surface of the roller bearing being positioned and retained within an internal annular recess within the ball cage. An end cap with a shank is threaded into the cage, with the shank terminating in an annular open bottom recess cooperatively receiving said roller bearing from trapping the roller bearing in the cage.

Abstract: A composite and self-lubricating bushing comprises a monolithic steel body having a machined internal cylindrical surface and a porous bearing layer applied to the surface. The porous bearing layer is formed by compacting and sintering a particulate bearing material. The steel body may also include a cavity for storing lubricant and at least one passageway extending between the cavity and the internal cylindrical surface. The bushing may be fabricated by positioning the steel body concentrically over an elastomeric plug, charging the annular cavity between the body and the plug with a sinterable particulate, expanding the elastomeric plug diametrically to compact the particulate, removing the plug and heating the bearing body and compacted particulate.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular recess in said cage inwarly of one end. A truncated roller bearing with opposed hemispherical surfaces and opposed flat sides is guidably positioned within the slot with the roller bearing maintaining a rolling point contact with the bottom wall of the slot and with the roller flat sides loosely and slidably registerable with the side walls of the slot. One of the hemispherical surfaces of the bearing being positioned and retained within an internal annular recess within the ball cage. There being a transverse arcuate slot through the cage in registry with its annular recess and an arcuate pull plug nested and retained within the slot and having an internal arcuate recess forming a continuation of the cage recess. A set screw in the cage retainingly engages the pull plug.

Abstract: A bearing construction interposes the coils of one or more coil springs between bearing surfaces. In one embodiment a bearing coil spring is wrapped around a shaft several times. The bearing coil spring may be freely mounted on a more substantial race coil retainer centered on the shaft. In another embodiment toroidal coil springs separated by disc races extend circularly about the shaft. In linear bearing construction, the bearing coils are in planes parallel to the line of shaft movement. Other embodiments of the invention involve disengageable shafts having complementary centering end-faces accommodating misalignment through the yield able action of the bearing spring coils, shafts and housings having non-circular cross-sections, and shafts and housings not having completely complementary surfaces to enable interference fit and positional control.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular recess in said cage inwardly of one end. A truncated roller bearing with opposed hemispherical surfaces and opposed flat sides is guidably positioned within the slot with the roller bearing maintaining a rolling point contact with the bottom wall of the slot and with the roller flat sides loosely and slidably registerable with the side walls of the slot. One of the hemispherical surfaces of the bearing being positioned and retained within an internal annular recess within the ball cage. A fastener within the profile of the guide post adjacent one end of the longitudinal slot traps the roller within the longitudinal slot and ball cage.

Abstract: A die set having a pillar slidable in a bush which are secured to plates, to maintain alignment of the plates, by connector devices which comprises clamping members clamped by fasteners to the plates so that clamping surfaces abut abutment surfaces on flanges on the pillar and bush; and the surfaces are inclined so that the clamping members are driven radially outwards by the flanges if the pillar and bush seize together.

Abstract: A toolholder guide for punch blocks and turrets and the like comprising a toolholder bore carrying about its circumference longitudinal protruding wear strips preventing contact between the toolholder body and the wall of the bore. The wear strips are preferably of plastic and are secured into dovetailed longitudinal keyways broached into the wall of the bore. The innermost surfaces are broached to the a close clearing radius with the body of the toolholder so that the toolholder is accurately centered and guided for reciprocal motion within the bore. Preferably, the broaching operations are carried out using a broaching fixture which secures an actuating hydraulic cylinder directly to the punch block or turret using adjacent toolholder bores for attachment purposes.

Abstract: A slide guide for a press comprises a pair of sliding surfaces for slide side and frame side arranged at four corners at the left and right sides as well as the front and rear sides of the press slide to maintain the set clearance constant and each slide's side sliding surface is provided with acclivities, parallel faces and declivities alternately in the sliding directions which produces a wedge-shaped oil film thereon and the effect of the wedging action of the oil film is heightened by properly setting a wedge angle formed by the acclivities and declivities in accordance with the slide's ascending/descending speeds so that the oil film generates a separating force to wedge off the slide side and frame side sliding surfaces, thereby enabling the slide's high speed motions to remain highly accurate without producing oil film breakdown even when the clearance is set minimal.

Abstract: A support mechanism for a cylindrical coordinate type industrial robot comprising a stationary upstanding tubular outer member and a displaceable inner member supported within the outer member to undergo axial displacement in upward and downward directions and angular displacement in clockwise and counterclockwise directions. The supporting mechanism includes a bearing interposed between the inner and outer members, the bearing including a retaining member rollably retaining thereon a plurality of rollable elements. An elastic balancing and restoring device for applying elastic biasing forces in opposite axial directions to the upper and lower ends of the retainer member is operative in the event the retainer member fails to maintain proportionate displacement with the inner member to temporarily increase the magnitude of the force difference between the oppositely directed elastic biasing forces in a direction effective to restore the proportionate displacement.

Abstract: In combination a guide sleeve, guide post having an exterior longitudinal slot, reciprocally projected into the sleeve and a ball cage mounting a plurality of ball bearings mounted upon the post for relative longitudinal and rotary movements thereon and interposed between the post and sleeve. A roller bearing is mounted within an internal annular recess in the cage and retainingly projects into the post slot limiting longitudinal movements of the cage relative to the post. The ball cage is free for rotary movements relative to the roller bearing, the post and sleeve. A radial bore in the cage is located outwardly of the recess and has notched corners for crosswise insertion of the roller bearing into the post slot and for positioning within the annular recess. A set screw in the bore traps the roller bearing. In a modification, an internal slot in the cage is opposed to the post slot, with the slots guiding the roller into the recess.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular open top recess in the cage inwardly of one end. A truncated roller bearing with opposed hemispherical surfaces and opposed flat sides in guidably positioned within the slot with the roller bearing maintaining a rolling point contact with the bottom wall of the slot and with the roller flat sides loosely and slidably registerable with the side walls of the slot. A hemispherical surface of the roller bearing being positioned and retained within an internal annular recess within the ball cage. An end cap with a shank is threaded into the cage, with the shank terminating in an annular open bottom recess cooperatively receiving said roller bearing from trapping the roller bearing in the cage.

Abstract: In combination, a guide post having a longitudinal slot and a ball bearing cage adjustably receiving the post and adapted for relative longitudinal and rotary movements, there being an internal annular recess in said cage inwardly of one end. A truncated roller bearing with opposed hemispherical surfaces and opposed flat sides is guidably positioned within the slot with the roller bearing maintaining a rolling point contact with the bottom wall of the slot and with the roller flat sides loosely and slidably registerable with the side walls of the slot. One of the hemispherical surfaces of the bearing being positioned and retained within an internal annular recess within the ball cage. A fastener within the profile of the guide post adjacent one end of the longitudinal slot traps the roller within the longitudinal slot and ball cage.