48 results about "Centring" patented technology

The invention relates to the field of angle measurement, in particular to a positioning measurement device for pipe jacking construction, which comprises a working well and a pipe body mounted on the lower part of the side surface of the working well in a penetrating manner, a turnover piece is mounted on the inner side surface of the working well, and the end part of the turnover piece is connected with a center frame; the axis of the center frame is aligned with the center point of one end of the pipe body, a centering frame is coaxially arranged at the other end of the interior of the pipe body, a plurality of inclined fixing frames are obliquely arranged on the outer side of the center frame in an annular array mode, the inclined fixing frames are attached to the inner edge of one end of the pipe body, and a plurality of wheel frames are arranged on the outer side of the centering frame in an annular array mode. And centering wheels are installed at the two ends of the wheel frame and attached to the inner wall of the pipe body, and a detection piece is installed at the end of the center frame. According to the invention, the detection convenience is improved, the device can adapt to pipe bodies with different diameters, the detection requirement is met, and meanwhile, the normal operation of pipe jacking construction operation is ensured.

The utility model discloses a motor rotor shaft turning clamp that can be self-adaptive and tightly hold and flexibly position, relates to the field of machining, and is composed of Morse taper, external thread connecting shaft, spring collet, threaded sleeve and adjusting sleeve and other components for connecting with the main shaft of machine tool. The sliding cavity of the front end of the external thread connecting shaft is provided with a sliding sleeve and a telescopic spring, and the sliding sleeve is fixedly connected with the spring collet. The sleeve sleeve of the front end of the threaded sleeve is sleeved outside the spring collet, and the inner wall of the front end is provided with a conical surface that is matched with the conical head of the spring collet. The adjusting sleeve is connected with the threaded sleeve through threads, and can drive the limiting sleeve to push the spring collet to move. During use, rotating the adjusting sleeve makes the spring collet move backward, and the spring collet is tightened under the action of the conical surface, the rotor shaft is self-adaptively and tightly held, and the telescopic spring realizes flexible positioning and compensates for the axial and angular deviation. The clamp can automatically adapt to the rotor shaft with a diameter tolerance within a certain range, has high self-centering precision, is suitable for high-precision turning machining of conventional rotor shafts, and has simple structure and convenient maintenance.

The application belongs to the technical field of center shaft polishing, and is especially a center shaft polishing machine, which comprises a rack one, a feeding mechanism and a storage mechanism are arranged on the front and back sides of the rack one respectively, a clamping mechanism one, a clamping mechanism two and a floating polishing mechanism are installed on the top of the rack one, a transfer mechanism is arranged between the clamping mechanism one and the clamping mechanism two and installed on the rack one, the transfer mechanism is used for intermittently grabbing two center shaft workpieces on the feeding mechanism, conveying the two center shaft workpieces to the clamping mechanism one and the clamping mechanism two, carrying out centering clamping, and polishing the side surfaces of the two center shaft workpieces through the floating polishing mechanism. The application can simultaneously polish two center shaft workpieces, compared with the traditional single polishing equipment, the device is more efficient, and the whole polishing process is fully automated operation, without too much participation of manual work.

The invention relates to the field of mechanical manufacturing, in particular to a steel balance block machining center clamp which comprises a mounting plate and a plurality of sets of clamps, the clamps position and clamp steel balance blocks, and each clamp comprises a centering mechanism, an upper pressing mechanism and a side jacking mechanism. The centering mechanism is sleeved with an inner ring of the steel balance block, the centering mechanism comprises a plurality of jacking blocks which expand and extend outwards from the center of the inner ring, and the jacking blocks abut against the side wall of the inner ring. An inner ring of the steel balance block is tightly jacked, an assembling gap generated when the steel balance block is assembled is eliminated, then the upper pressing mechanism and the side jacking mechanism are matched for positioning the steel balance block, multi-point positioning is formed on the steel balance block, a positioning network is formed through multi-point positioning, and then accurate positioning of the steel balance block is achieved. And the machining precision of the steel balance block is improved.

A drilling and positioning tool for a main gear of a differential mechanism comprises a base, an inner hexagon bolt, a height reference block, a workpiece blank, a pull rod, a centering expansion sleeve and a mandrel, the base is of a rectangular structure, a bolt hole is formed in the center of the base, the inner hexagon bolt is installed on the edge of the base, and the height reference block is installed on the height reference block. The height reference block is installed in the center of the base, the central part of the height reference block is provided with the core shaft, the upper part of the core shaft is provided with the centering expansion sleeve, the centering expansion sleeve is provided with the workpiece blank, and the upper part of the workpiece blank is provided with the pull rod; compared with a traditional three-jaw chuck, the three-jaw chuck has the advantages of being long in clamping time, firm in clamping and high in progress.

This invention provides a pipeline laying method and a centering component that enable smooth and low-cost joining of leading and trailing pipes. [Solution] The pipeline laying method comprises an installation step of installing a centering member 8 on the inner surface of the socket of the lead pipe 3; a centering step of inserting the insertion end of the lead pipe 4 into the socket of the lead pipe 3 and inserting the centering member 8 into the gap between the inner surface of the socket of the lead pipe 3 and the outer surface of the insertion end of the lead pipe 4 to align the pipe axes of both pipes 3 and 4 at the joint portion of both pipes 3 and 4; and a retrieval step of, after the centering step is completed, pulling out the centering member 8 from between the inner surface of the socket of the lead pipe 3 and the outer surface of the insertion end of the lead pipe 4 and retrieving it. The centering member 8 has a plate-shaped portion 8a that is sandwiched in the gap between the inner surface of the socket of the lead pipe 3 and the outer surface of the insertion end of the lead pipe 4, and an extended piece 8b that protrudes from the gap and extends from the plate-shaped portion 8a so as it moves away from the plate-shaped portion 8a, it moves away from the outer surface of the insertion end of the lead pipe 4.

The present application relates to the field of coaxial butt joint in pipe welding, and discloses a correction butt joint method before large pipe welding, step one: the pipe to be welded is moved to between two groups of butt joint auxiliary devices; step two: the clamping correction mechanism is inserted into the pipe; step three: the clamping correction assembly clamps the pipe coaxially and self-centers; step four: among the two groups of clamping correction members, one group clamps the pipe wall, and the other group is switched to the correction state to correct the recess on the surface of the pipe, so that the recess correction on the surface of the pipe is realized without dead angle, and then the two groups of clamping correction members are kept in the clamping state; step five: the two groups of mounting seats are close to each other, the two pipes are close to each other, then the feeding mechanism drags the clamping correction mechanism and the pipe to move, and the two pipes finally complete the coaxial butt joint.

The utility model discloses a supporting device for a binding machine, which comprises a slide rail base, an end part supporting structure is arranged at the end part of the slide rail base, an overturning frame and a chuck structure are arranged on the slide rail base from front to back, and the chuck structure comprises a first bottom frame, a first lifting frame and a three-jaw self-centering chuck; the overturning frame comprises a second bottom frame, a second lifting frame and a rubber roller; the end supporting structure comprises a third bottom frame, a third lifting frame and a supporting platform. The inductor winding and supporting device is reasonable and ingenious in structural design, the end supporting structure supports the head of a sleeve, the overturning frame supports the middle of the sleeve, an inductor is overturned through a rubber roller, the chuck structure clamps the tail of the sleeve and provides forward driving force, use is flexible and convenient, and the inductor winding and supporting device can be suitable for winding and supporting inductors of different sizes.

Centring device for reversible attachment to a setting tool for blind rivet nuts In a centring device (1) for reversible fastening to a setting tool (3) for blind rivet nuts (17), a base element (2) is provided for connection to the setting tool (3), to which a support element (4) is arranged at a distance. An opening (9) is provided in the support element (4), which is designed for the passage of at least one region of a screwing tool (10) of the setting tool (3) and the centre axis of which can is alignable coaxially with a longitudinal axis of the screwing tool (10) that can be passed through. There are centring means (13) arranged around the opening (9), which extend axially to the centre axis of the opening (9). The centring means (13), which are fixed with their one end (14) to the support element (4) around the opening (9), extend symmetrically in a conical shape away from the support element (4) towards the centre axis and form an expandable conical head (16) with their second free end (15).

The present application relates to the technical field of building construction, and discloses a reinforcing cage auxiliary rotating device, which comprises a turnover driving assembly, a shaft centering connecting assembly and a supporting assembly, the supporting assembly is provided with a movable resting part for supporting the reinforcing cage, the shaft centering connecting assembly comprises a centering assembly and a connecting assembly, the centering assembly comprises a measuring assembly and a centering assembly, the measuring assembly comprises a first measuring piece, a second measuring piece and a side leaning piece, and the centering assembly comprises a transverse scale, a longitudinal scale and a reinforcing bar inserting sleeve, the transverse scale is used for measuring the distance between the first measuring piece and the side leaning piece, and the diameter of the reinforcing cage is determined. Through the arrangement of the turnover driving assembly, the shaft centering connecting assembly and the supporting assembly, the torsional force can be reduced during the rotation of the reinforcing cage, the reinforcing cage rotates stably, deformation is avoided, personnel inspection and reinforcing winding are facilitated, the work efficiency is improved, and the work intensity is reduced.

The application discloses a welding equipment with a limiting structure for a human defense door leaf steel bar framework, relates to the technical field of welding, and aims at the problem that the prior art cannot adapt to the steel bar diameter tolerance and height difference, and the partial pressing points are easily virtually pressed or over-pressed, which leads to the decline of the flatness of the steel bar mesh after welding and the poor welding effect, and proposes the following scheme, which comprises a bearing base and a portal frame, a plurality of support plates are arranged on the top outer wall of the bearing base in the length direction, sliding grooves are formed in the upper outer walls of the plurality of support plates, limiting mechanisms are arranged on the plurality of support plates, and the limiting mechanism comprises a sliding seat slidingly arranged in the sliding groove and two connecting blocks connected to the outer walls on the two sides of the sliding seat through bolts. The application can self-centering support and limit the steel bar, and can self-adaptively press the steel bar in cooperation with the limiting mechanism during welding, so that the steel bar is prevented from being warped during welding, and the welding effect is improved.

The invention relates to an autonomous centring-idler station located on a conveyor belt every two existing upper idlers, which solves the problem of existing robust aligning systems which, most of the time, do not fulfil their purpose. The station provides safety, helps to keep the conveyor belt centred and is a complement that helps control operational costs, in comparison with current self-aligning systems. The station comprises a frame-like structure that supports a roller or idler which exerts continuous friction against the left and right edges of the conveyor belt, the frame-like structure being disposed on the conveyor belt using the existing structures. The centring station enables the correct movement position of the conveyor belt to be maintained during the movement thereof, by means of the centring rollers or idlers, arranged opposite each other on the left and right sides of the belt, wherein each centring roller is disposed at a 45° angle, supported by a rolling shaft that is mounted on ball bearings, disposed at a 45° angle and supported between two metal plates. The rolling shaft is inserted inside a tube or cylindrical sleeve made of mild steel that allows the shaft to roll therein and also protects same, such that the HDPE centring idler rotates reliably, supported at the ends thereof on the ball bearings.

The invention provides a coupling and centering system for enclosed hollow metal plate elevator rails, each two adjacent rails and coupling plate forming a block, and wherein each rail comprises a slide, a side wing and a base having an outer surface, and the coupling plate is arranged on the outer surface of each two adjacent rails, connecting the rails together with the edges of the rails facing each other; wherein: a) each rail has a cutout on the edge of the base facing the adjacent rail, so that the cutouts of the adjacent rails form a recessed through hole; b) the coupling plate has a central hole corresponding to the recessed through hole; c) a clip comprising: c1) a main body located in the adjacent rails in the area where the edges of the main body face each other, which is sized to pass through the recessed through hole; and c2) one or more upper components in continuous contact with the inner walls of the slides of the two adjacent rails facing each other; and c3) means connected to the block of the two adjacent rails and the plate.

The invention discloses a welding positioning device for an air suspension hoop. The welding positioning device comprises a fixed bottom plate, a sliding mechanism, a first inner mold, a second inner mold, a first inclined pressing mechanism, a second inclined pressing mechanism and a centering mechanism, wherein the first inclined pressing mechanism and the second inclined pressing mechanism are symmetrically arranged; the first inner mold and the second inner mold are fixedly arranged on the fixed bottom plate and the sliding back plate respectively, a gap is reserved between the first inner mold and the second inner mold, and semi-arch-shaped supporting blocks of the first inner mold and the second inner mold are used for supporting hoops. The centering insertion piece can be inserted into the gap for centering, the first inclined pressing mechanism firstly presses the first end of the hoop to be attached to the centering insertion piece, after the centering insertion piece is withdrawn, the second inclined pressing mechanism fixes the second end of the hoop, and the sliding mechanism drives the second inner mold to drive the second end of the hoop to be in accurate butt joint with the first end. According to the welding positioning device for the air suspension hoop, strict alignment of the two free ends of the hoop in the up-down direction and the front-back direction is achieved, the welding yield is greatly increased, and the welding positioning device is suitable for the large-batch low-cost production requirement.

The present application relates to the technical field of welding equipment, and discloses a full-automatic ring seam welding machine for carrier rollers, which comprises a concave table, a supporting frame is arranged at the bottom of the concave table to isolate and support the bottom of the concave table; two machining stations are arranged at the top of the concave table, and track grooves for switching the stations are arranged on the front and back sides of the middle part of the top of the concave table. By increasing and arranging an end part processing mechanism, the mechanism can not only realize accurate butt joint of the center parts on both sides through a synchronous cross seat, ensure coaxial operation of the centering structure and synchronous rotation of the roller body, but also can calibrate the parallelism of the protective end cover through an inner-outer double-layer alignment structure, and the outer alignment seat is used to adhere to the outer side of the protective end cover, and the inner alignment seat is driven by hydraulic transmission to hold the inner side of the protective end cover, so that the inclination deviation of the protective end cover can be corrected reliably through the inner-outer cooperative action, and the parallelism between the inner and outer sides of the protective end cover and the end surface of the roller body is ensured.

The invention relates to the related technical field of manufacturing of welding equipment, discloses welding equipment for producing and manufacturing a front rack part of a land leveler, and aims to solve the problems that a large welding seam exists between a supporting beam and a flange plate and the follow-up welding quality is not easy to detect. The flange plate is centered and clamped through the chuck, then the movable top frame inclines downwards, the gravity of the guide sliding base and the gravity of the supporting beam are concentrated to the contact portion between the supporting beam and the flange plate, and the problem that a welding seam is too large due to the fact that pressing is not in place is avoided. After welding is completed, the movable top frame is pushed again to incline upwards through the lifting assembly, at the moment, the movable top frame moves in the direction away from the flange plate through the gravity of the guide sliding base and the supporting beam, and if welding is not firm, the supporting beam and the flange plate can be directly separated due to traction of the guide sliding base; therefore, the purpose of welding quality bearing detection is achieved.

Fixing device (1) for fixing a pipe welding device to a dimensionally stable, in particular circular cylindrical, pipe section (32, 33) to be welded, wherein the fixing device (1) comprises: a rotating device (22) for rotating, in particular in a circular arc shape, a welding head of the pipe welding device about an axis of rotation; a gripping device comprising a first gripping arm (2) with a first clamping jaw (6) attached thereto with exactly one first concave clamping surface and a second gripping arm (3) with a second clamping jaw (7) attached thereto with exactly one second concave clamping surface, where: the first clamping jaw (6) is rotatably mounted on the first gripping arm about an axis (4) running parallel to the axis of the pipe section (32, 33) over a predetermined angular range, such that it can be selectively brought into different orientations (8, 10, 12) relative to the first gripping arm (2) by means of a rotational movement about the axis (4) running parallel to the axis of the pipe section (32, 33) and can be fixed in these orientations (8, 10, 12), each of which corresponds to an associated pipe diameter; wherein for each such diameter of the pipe section (32, 33) a respective first bore is provided on the first clamping jaw (6) and the first clamping jaw (6) can be fixed by means of an inserted fixing pin (9) through the respective first bore into a second bore of the first gripping arm (2); wherein the second clamping jaw (7) is attached to the second gripping arm in such a way that it is freely rotatable relative to the latter over a predetermined angular range about an axis of rotation (5) running parallel to the axis of rotation of the pipe section (32, 33); and The gripping device is configured to fix the pipe welding device to the pipe section (32, 33) by means of a clamping action exerted by the clamping jaws via their concave clamping surfaces on the pipe section (32, 33) from an open position to a closed position dependent on the currently selected and fixed orientation (8, 10, 12) of the first clamping jaw, with a reduced distance between the concave clamping surfaces compared to the open position, in which a symmetry axis of a dimensionally stable, in particular circular cylindrical, pipe section (32, 33) clamped between the concave clamping surfaces of the clamping jaws (6, 7) running parallel to the axis of rotation of the rotating device (22) is spaced from the axis of rotation by a maximum specified amount of a maximum of 2% of the diameter of the pipe section (32, 33).

The application discloses a self-centering clamp structure for honing disc parts, wherein the disc part is provided with an inner hole along the direction of a central axis, and the clamp structure comprises a clamp body, a taper sleeve and a locking nut; the clamp body is provided with a central hole at both ends, which is matched with a machine tool center during honing; the outer peripheral wall of the clamp body is provided with a stop part, a conical part and a threaded part; the taper sleeve is sleeved on the conical part; the locking nut is matched with the threaded part and is in contact with one end of the taper sleeve; the inner hole of the disc part is sleeved on the outer peripheral wall of the taper sleeve; one end of the disc part is supported on the stop part; and the locking nut is rotated to push the taper sleeve to slide on the conical part so as to tighten or relax the inner hole of the disc part. The application has the advantages of high clamping efficiency and high part surface quality.

An adjustable clamping device, namely a welding or cutting device, relates to the field of machine tool clamping device technology. It includes: a rotatable four-jaw self-centering chuck supported by a base, having four fixed seats evenly distributed around the rotational axis of the chuck, the four fixed seats being configured to synchronously move closer to or further away from the rotational axis; the adjustable clamping device further includes clamping assemblies corresponding to each fixed seat, the clamping assemblies including adjusting seats and jaws; the adjusting seats have first toothed portions, and the jaws have second toothed portions that mesh with the first toothed portions; the second toothed portions can mesh with the first toothed portions at different positions, so that the distance between the clamping portions of the two jaws in relative positions is adapted to the shape of the workpiece to be clamped, improving work efficiency. The aforementioned welding or cutting equipment includes the adjustable clamping device described above.

The utility model discloses a kind of auxiliary fixtures of bending experiment, it is related to auxiliary fixture field, and this kind of auxiliary fixture of bending experiment includes the support block of L type arrangement, the top of support block is equipped with opening, support pivot is rotatably installed in opening inner wall, two pieces of centring clamps are symmetrically arranged in the included angle of support block, and two horizontal slide rails are symmetrically fixed on the longitudinal inner wall of included angle;This kind of auxiliary fixture of bending experiment is placed in the included angle of support block by setting centring structure and centring clamp, so that the measured piece on support pivot can be guided in the middle by two centring clamps, and the measured piece is guided to the pressure blade directly below, significantly improve test accuracy, avoid artificial centring error.

The utility model discloses a kind of centring nature uncoiler maintenance platform based on positioning reference, including welding platform, mobile platform and supporting leg module.Welding platform base is cylindrical structure, with uncoiler reel precision centring, utilize loading trolley coil saddle degree of coaxial adjustment and pass through reel tension support.Two mobile platforms telescopic slide, with locking mechanism, stand out and increase standing area, retract and facilitate storage.Supporting leg module uses channel steel engagement track, height adjustable, ensure stability.Fence provides safety protection.The utility model realizes precision centring, stable support and flexible operation, significantly improve maintenance efficiency and security.

This application discloses a welding positioning fixture for an exhaust pipe, relating to the field of welding fixtures. The welding positioning fixture includes a back plate base, a first positioning shaft, a second positioning shaft, a first clamping mechanism, and a second clamping mechanism. This application centers the exhaust pipe using the first positioning shaft, and the reference surface of the back plate base axially positions the exhaust pipe. Then, the second positioning shaft is brought closer to the first positioning shaft axially so that the positioning step surfaces of the first and second positioning shafts engage for positioning. The exhaust pipe and the second positioning shaft are then clamped by the first and second clamping mechanisms respectively, thereby completing the welding positioning of the exhaust pipe and the small pipe. This application forms positioning holes by connecting the arc grooves on the two positioning shafts, thereby limiting the circumferential angles of the small pipe and the exhaust pipe through the positioning holes. The two positioning holes correspond one-to-one with the two small pipes, and the two positioning holes are spaced at a predetermined angle in the circumferential direction to ensure the stability of the two small pipes during the welding process and the correct angles after welding.

The application discloses a guide device for MJS method pile construction, which comprises a centering connecting pipe and a guide sliding sleeve, drill pipe and drill body pipe are detachably arranged at two ends of the centering connecting pipe to form a straight linear drill pipe body, an inclined surface is arranged at the end of the guide sliding sleeve, the guide sliding sleeve is arranged on the surface of the centering connecting pipe, an annular groove is formed in the inner wall of the guide sliding sleeve, a positioning ring is rotatably arranged in the annular groove, and a guide sliding block is fixedly arranged on the inner wall of the positioning ring. The guide sliding sleeve is arranged on the surface of the drill pipe body, the guide sliding sleeve is submerged into the underground soil layer together with the drill pipe body during the drilling process, the guide sliding sleeve is rotated, the direction of the inclined surface is changed, the inclined surface is provided with a lifting resistance by using the sludge, the direction of the drill pipe is corrected through the resistance, and the effect of preventing deviation is achieved. The method has the advantages of simple structure, easy control, manual intervention condition for horizontal and inclined deep hole pile construction, and improved pile construction quality.

This invention belongs to the field of building construction technology and discloses a micropile steel pipe insertion positioning and limiting device, including a support frame and a controller disposed on one side of the support frame. A through hole is formed at the upper end of the support frame, and a self-centering clamping component is bolted into the through hole. Adjustment components are bolted to the four corners of the lower end of the support frame. A leveling component is detachably connected to the upper end of the support frame, and a second clamping component is disposed at the upper end of the leveling component. The second clamping component, the leveling component, and the self-centering clamping component are arranged coaxially. This micropile steel pipe insertion positioning and limiting device, through the coordinated arrangement of the self-centering clamping component, the adjustment component, the second clamping component, and the leveling component, can quickly correct the posture of the micropile steel pipe when it is hammered by an external hammering device, causing the micropile steel pipe to deviate, ensuring that it always remains vertical.

The application provides a tool set and a measuring method for measuring a barrel bore, comprising a plurality of barrel bore measuring tools, each of which is a stepped shaft structure and comprises a centering section, a positioning section, an indirect measuring section and a handle operating section which are coaxially connected in sequence, and the diameter of the positioning section of each barrel bore measuring tool is designed to be different and between the small end diameter and the large end diameter of the measured barrel bore taper surface. Different barrel bore measuring tools in the tool set are used to measure the measured barrel bore, the distance from the barrel tail end surface to the tail end surface of the indirect measuring section is obtained through the measurement, and then the cross section diameters of the corresponding cross sections at a plurality of different positions of the barrel bore and the axial actual position data of the cross sections to the barrel tail end surface are obtained through simple conversion; finally, the actual size of the measured barrel bore taper surface is obtained through data fitting on the obtained data. The method is simple to operate, easy to implement, high in measuring efficiency and low in cost.

The utility model relates to the technical field of roller carrier devices, in particular to an automatic seam welding machine roller carrier device which comprises two bases, two machine frames fixedly connected to the upper surfaces of the two bases and a fixing plate, a rotating plate is rotatably connected to the lower surface of the fixing plate, rotating shafts are fixedly connected to the two ends of the rotating plate, and the rotating shafts are fixedly connected to the lower surface of the fixing plate. The surfaces of the two rotating shafts are rotationally connected with driving rods, and the ends, away from the rotating plate, of the two driving rods are rotationally connected with fixing shafts; the number of the base frames is two, the lower surfaces of the two base frames are fixedly connected with the surfaces of the two corresponding fixing shafts respectively, and the two base frames are arranged on the upper surface of the rack in a sliding mode; by means of synchronous opposite movement of the two roller sets, centering clamping of a workpiece can be achieved, the clamping effect is improved, and meanwhile the problem that the quality of a welding seam is uneven due to eccentric rotation of the workpiece caused by single-side pressing is solved.

The invention relates to the technical field of blade machining and assembly positioning, in particular to a blade three-dimensional positioning mold placenta and a positioning method.The mold placenta comprises a mold placenta body which is of a disc-shaped structure and used for bearing and positioning a blade, and the mold placenta body is provided with electrode holes through which an electrode welding head can pass when an upper folded edge of the blade is welded; the toothed centering disc is of a toothed structure and is located in the center of the mold plate body, the toothed centering disc is rotationally connected with the mold plate body through a driving device, the toothed centering disc is used for being matched with the vertex of the blade, and the toothed centering disc can be driven by the driving device to rotate to drive the blade to slightly rotate to adjust the angle of the blade; the two groups of first positioning pins are arranged at intervals along the molded surface of the mold placenta body and are used for being matched with the lower folded edge of the blade to limit the degree of freedom of the blade part; according to the invention, the positioning flexibility is realized, the trial-manufacture period is shortened, and the rejection rate is reduced.

The utility model relates to the technical field of material winding carries, specifically relates to a kind of self-centering device for material winding, including circular ring, circular plate, clamping mechanism and dismounting mechanism, circular plate is fixedly installed on circular ring by connecting frame, clamping mechanism is slidably installed on connecting frame, clamping mechanism is used to center clamping to material winding, dismounting mechanism is used to dismount to clamping mechanism, clamping mechanism includes locating block, moving block, sliding block and threaded rod, moving block is slidably installed on locating block by guide rod, and moving block is hinged with sliding block by hinged plate.The self-centering device for material winding, by the clamping mechanism and moving mechanism being set, can be clamped and carried to the center shaft hole material winding of different diameters, the position of clamping plate can be adjusted according to the material winding of different thickness simultaneously, the outer wall and inner wall of material winding are clamped simultaneously, and then the self-centering clamping effect and safety of material winding device are improved.

This invention provides a fixture for drilling cylinder blocks, belonging to the field of tooling and fixture technology. It solves the problem of low processing efficiency. It includes a fourth shaft with a bridge plate and a base fixed to the top of the bridge plate. A first groove is provided on the front side of the base, containing two opposing centering clamping blocks. One centering clamping block is fixed to one side wall of the first groove, while the other centering clamping block can move left and right. Each of the opposing ends of the two centering clamping blocks has an annular centering step. A second groove is provided on the front side of the bridge plate, directly below the first groove. The distance between the left and right walls of the second groove is greater than the minimum distance between the two centering clamping blocks. A block-shaped abutment protrudes from the wall of the first groove, located on the same side as the centering clamping block fixed to the base. A vertically movable pressure block is connected to the top of the base, also located on the same side as the abutment. It has the advantages of high processing efficiency.