231 results about "Serration" patented technology

The utility model relates to the technical field of garden pruning instruments, and particularly discloses a cylindrical pruning cutter which comprises a cutter holder and a blade, the cutter holder is arranged in a circular ring shape, a fixing part is arranged at one end of the cutter holder, a mounting part is arranged at the other end of the cutter holder, the blade is in a circular ring shape, one end of the blade is fixedly connected with the mounting part, and sawteeth are arranged at the other end of the blade in a surrounding mode. The utility model further discloses a trimming device with the trimming cutter. The cylindrical shape trimming cutter and the trimming device are simple in structure and high in trimming efficiency.

The invention relates to the technical field of cross-flow wind wheels, in particular to a cross-flow fan blade tail edge sawtooth structure and a cross-flow wind wheel applying the cross-flow fan blade tail edge sawtooth structure. The sawtooth structure comprises a fan blade body, and the peripheral contour of the fan blade body is defined by a fan blade root edge, a fan blade tail edge, a fan blade top edge and a fan blade front edge; the fan blade main body is provided with a pressure surface and a suction surface, the pressure surface and the suction surface are oppositely arranged, the pressure surface is concavely arranged towards the suction surface, so that the suction surface is convexly arranged, and the section shape of the pressure surface, the section shape of the suction surface, the fan blade root edge and the fan blade top edge are arranged in an arc shape; a plurality of notches are formed in the tail edge of the fan blade in an inwards-concave mode, and the adjacent notches are different. By means of the innovative structural design, noise is effectively reduced, and meanwhile it is guaranteed that the core aerodynamic performance of the fan blade is stable.

The utility model relates to fire fighting equipment, concretely relates to a fire axe, including axe handle and the axe body that sets up in the one end of axe handle, the hollow structure of axe handle, is set with a folding mechanism in the axe handle, the folding mechanism includes the moving pipe of the sleeve setting in the inside of axe handle, the first sawtooth blade of rotation folding is embedded on the moving pipe, the first sawtooth blade is through the rotation pin of hollow structure and is rotationally arranged in the moving pipe end, is set with the connecting hole of a plurality of hole structure on the axe body, and the second sawtooth blade is rotationally arranged on the axe body, the utility model not only has the function that the traditional fire axe breaks and dismantles, but also has the function that assists the rope drop of fireman.

A chopper blade for use in an agricultural harvester chopper to chop crop residue includes a blade body and a hard face. The blade body includes a cutting edge of the chopper blade. The hard face is applied to a surface of the blade body and is harder than the blade body. The hard face includes a sawtooth pattern along the cutting edge such that during use of the chopper blade, the cutting edge wears to the sawtooth pattern to match the sawtooth pattern, thereby forming corresponding sawteeth in the cutting edge, and the sawtooth pattern becomes part of the cutting edge of the chopper blade.

The double-edge sawtooth bone knife comprises a knife rod, the knife rod is connected with a blade, and the section, away from the knife rod, of the blade is provided with a cutting part; the cutting part comprises a first sawtooth part arranged at the end of the blade, a second sawtooth part and a third sawtooth part, the second sawtooth part and the third sawtooth part are arranged on the two sides of the blade respectively, the second sawtooth part and the third sawtooth part are connected to the two ends of the first sawtooth part respectively, and each of the second sawtooth part and the third sawtooth part comprises a plurality of convex back teeth. The cutting part has the advantages that the tooth-shaped structural design of the cutting part is optimized, vibration and noise during use are reduced, and the cutting quality can be improved.

This invention relates to the field of drilling equipment technology, specifically to a diamond-coated drill bit, comprising a drill bit connecting rod and a drill bit; water passage holes are provided inside the drill bit connecting rod and inside the drill bit, a first water outlet device is provided at the top of the water passage holes, and the first water outlet device is provided with a plurality of first water outlet holes; a second water outlet device is provided inside the water passage holes; the second water outlet device includes a screw, a plunger, and a turntable; the turntable is rotatably connected to the inner wall of the drill bit connecting rod in the horizontal direction, and the bottom of the turntable is provided with serrations that mesh with a gear, the gear being mounted on a rotating rod; the screw is threadedly connected to the turntable, and one end of the screw is connected to a mounting plate, the mounting plate being provided with a vertical plunger that can be inserted into the first water outlet hole; the plunger has a hollow structure, with a second water outlet hole on its upper side and its lower end communicating with the water passage hole. The first and second water outlet devices of this invention provide dual protection for the cooling of the drill bit, and also prevent the water outlet holes from becoming blocked.

The low-noise saw blade comprises a saw blade body, a mounting cavity is formed in the portion, between a mounting hole and sawteeth, of the saw blade body, rubber blocks are filled in the mounting cavity, fixing plates used for covering the mounting cavity are arranged on the front side and the rear side of the saw blade body, the mounting cavity is in a fan shape, and the rubber blocks are arranged on the fixing plates. The saw blade body is provided with a mounting hole, the saw blade body is arranged in an array mode with the mounting hole as the circle center, first silencing holes communicating with the sawtooth gaps are formed in the saw blade body and correspond to the sawtooth gaps, and the saw blade further comprises second silencing holes which penetrate through the fixing plate and the saw blade body. The saw blade has the advantages that the installation cavity is formed in the saw blade body, the rubber block is filled in the installation cavity, rigid saw blade materials are replaced by soft rubber, vibration waves generated by vibration in the high-speed rotation process of the saw blade body can be effectively absorbed, and therefore noise of the saw blade body is effectively reduced.

The utility model discloses an MAG combined multifunctional sawtooth alloy saw blade with a self-guiding cutting deviation prevention function, and relates to the technical field of saw blade cutting. The metal saw blade comprises a saw blade base body, and a plurality of metal saw teeth are arranged on the saw blade base body. In the cutting process of the saw blade, each group of metal saw teeth comprises seven cutting tips and ten cutting edges, so that the saw blade with the design of the combined saw teeth is provided with multiple tooth tip cutting edges compared with any existing saw tooth design so as to reduce the abrasion speed of saw tooth alloy in the cutting process, and the service life of the saw blade is prolonged; meanwhile, the alloy of each tooth is of a symmetrical tooth top design, so that the saw blade can be effectively prevented from deviating leftwards and rightwards during cutting, a centering and cutting deviation preventing function is achieved, the cutting force of the saw blade is effectively reduced, and saw blade deviation and rigidity reduction caused by temperature rise of sawteeth in the cutting process are reduced, especially for metal cutting; and meanwhile, the electric energy loss of the motor is reduced.

The invention relates to the technical field of additive manufacturing, and discloses a supporting structure for additive manufacturing of a large-size thin-wall workpiece, which comprises a hollow rib plate control frame, a variable density lattice support and a solid grid lattice distribution structure, the hollow rib plate shape control frame is arranged in the thin-wall part or in an opening area, the variable-density lattice support is arranged at a key part and an easy-to-deform area of the thin-wall part, and the solid grid lattice distribution structure is arranged in a stress concentration area or a sudden change surface area of the thin-wall part. A sawtooth cutting contact structure is arranged at the contact part of the cutter and the thin-wall part; according to the supporting structure for additive manufacturing of the large-size thin-wall part, mechanical linkage and thermal expansion self-adaption design of the movable assembly are utilized, transmission cooperation of a driving plate, a toothed plate and a gear is combined with the limiting effect of a bevel gear set and a limiting plate, an abutting plate is attached to the inner wall of a frame all the time, and gaps and stress concentration caused by thermal expansion are counteracted; and the supporting stability and the fitting degree are maintained.

The bar cutting device for wheel production comprises a feeding frame and a conveying frame which are arranged left and right, and a fixing frame and a cutting frame are arranged on the front side and the rear side of the feeding frame and the front side and the rear side of the conveying frame correspondingly; a cleaning mechanism is arranged on the feeding frame; a cutting mechanism and symmetrically arranged cutting cylinders are arranged on the cutting frame; pressing air cylinders are symmetrically arranged on the fixing frame; the cutting mechanism comprises a supporting frame body, a rotating main shaft is arranged on the outer side of the supporting frame body, a cutting saw blade is installed on the circumferential face of the rotating main shaft, and air cooling heat dissipation mechanisms are symmetrically arranged on the two sides of the cutting saw blade. According to the wheel bar cutting device, surface cleaning can be conducted on a wheel bar before cutting, then cutting machining is conducted, the calcining effect of the wheel bar in an annular heating furnace is effectively improved, in the cutting process, cooling air exhausted by an air cooling heat dissipation mechanism can cover the surface and sawteeth of a cutting saw blade, and the cutting efficiency is improved. And the service life of the cutting saw blade is effectively prolonged.

The invention provides a rotary cutting machine saw blade storage device which comprises a base set, a central fixing mechanism, two saw blade assemblies, two supporting assemblies and a grinding assembly. The base set comprises a base, an annular sliding block and a plurality of central clamping bases. According to the saw blade storage device of the rotary cutting machine, the base set, the central fixing mechanism, the two saw blade assemblies, the two supporting assemblies and the grinding assembly which are arranged are matched with one another. By means of the shrinkage joints which are originally arranged on the saw blades and used for preventing the saw blades from collapsing and deforming due to the fact that the surface temperature of the saw blades is too high during cutting, the steel wires matched with the joints are inserted, and then the multiple saw blades can be inclined or corrected at the same time by controlling the steel wires. In this way, after the stacked saw blades are obliquely arranged, the sawteeth of the saw blades are exposed at the same time, and workers can grind the sawteeth of the multiple saw blades at a time.

The invention relates to the field of steel belt manufacturing, in particular to a steel belt manufacturing process which comprises the following steps: step 1, welding two ends of a steel belt body to enable the steel belt to be annular; 2, the steel belt body is arranged on a manufacturing device in a sleeving mode, and the steel belt body is made to operate in an oval track through the manufacturing device; thirdly, the two faces of the steel belt body are polished through a manufacturing device, and meanwhile the two side edges of the steel belt body are subjected to deburring treatment; fourthly, cleaning liquid is sprayed to the polishing position while the steel belt body is polished, and chippings are removed; fifthly, the cleaning fluid on the two faces of the steel belt body is blown dry through hot air; sixthly, a plurality of auxiliary wire grooves are machined in the outer surface of the steel belt body through a manufacturing device; seventhly, saw teeth are punched on the single side edge of the steel belt; 8, the manufactured steel belt finished product is taken down; a plurality of auxiliary wire grooves can be machined in the surface of the steel belt, and workers can conveniently cut and weld the damaged steel belt.

The invention relates to a method for manufacturing a blade (7) made of composite material for a turbomachine, comprising the following steps: (a) production of a fibrous preform by weaving fibers and intended to form part of the blade, (b) shaping and stiffening of the fibrous preform in a preforming tool, (c) placement of the fibrous preform in a mold, (d) densification of the fibrous preform with a resin to form the blade, wherein, before and / or after step (c), the method further comprises a step (i) of introducing fiber webs into the mold so as to cover at least part of an edge of the fibrous preform, these fiber webs having a corrugated or serrated edge; during step (d), the fiber webs are also densified with the resin to form the serration element. Figure for the abstract: Figure 5

A serrated panel for a trailing edge of a wind turbine rotor blade includes at least two teeth each having a tip, a base, a length measured between the base and the tip, a width measured at the base, wherein the length is larger than the width, and two edges running from the tip to the base, each edge having a tip end-section extending from the tip to an intermediate point, and a main section extending from the intermediate point towards the base. A plurality of tines are arranged side by side in a chordwise direction, each beginning at one of the edges and extending rearwards. All tines beginning in one of the main sections have the same, first length, between 20% and 60% of the length of the respective tooth, and all tines beginning in one of the tip end-sections are shorter than the first length.

The utility model relates to the technical field of grooving cutters, and discloses a fillet carton grooving cutter without burrs during grooving, which comprises a cutter body, a sawtooth blade is fixedly connected to the rear side of the cutter body, a plurality of first sawteeth are arranged on the upper side and the lower side of the rear side of the sawtooth blade, a plurality of second sawteeth are arranged on the upper side and the lower side of the rear side of the sawtooth blade, and a plurality of second sawteeth are arranged on the upper side and the lower side of the rear side of the sawtooth blade. Oil storage grooves are formed in the first sawteeth and the second sawteeth, cutter heads are fixedly connected to the left side and the right side of the rear side of the sawtooth blade, a protective coating is arranged on the outer portion of the cutter body, and an arc-shaped blade is fixedly connected to the rear side of the sawtooth blade. According to the saw blade, cutting force is dispersed through the high saw teeth and the low saw teeth, local excessive abrasion is avoided, stress concentration is reduced through high-low staggered cooperative operation, passivation of the saw teeth is effectively delayed, lubricating oil reduces the friction coefficient and takes away heat, abrasion of cutting edges and adhesion of materials are reduced, and the saw teeth are assisted to keep sharpness to a great extent.

A decoration panel leveling connecting keel comprises a leveling wall attaching base and a flat receiving edge sectional material, the leveling wall attaching base comprises a U-shaped base and connecting pieces rotatably connected to side plates on the two sides of the U-shaped base, the flat receiving edge sectional material is of an E-shaped structure, and the side plates on the two sides of the E-shaped structure are connected with the connecting pieces through screws. A U-shaped inverted tooth socket is arranged on the vertical portion of the middle of the structure shaped like the Chinese character'shan ', the U-shaped inverted tooth socket comprises two limiting plates arranged at a certain interval, and sawtooth strips are arranged on opposite side plates of the two limiting plates. The whole component can be reused after being detached, reversible installation is achieved, and material loss is reduced. The requirement for an assembly type installation system is met to the maximum extent, needed materials are reduced, construction procedures are optimized, and rapid assembly is achieved. And on-site construction pollution is effectively reduced, and meanwhile labor and material cost is reduced.

A self-locking screw includes a screw body and a screw head. The screw body includes a screw shank, a screw tip, a thread, serrations, and protrusions. The screw tip is a square pyramidal shape formed by four flat beveled surfaces. The serrations begin at the connection between the screw shank and the screw tip, spiraling upwards to the middle section of the screw shank with a helix angle of 15°. The crest of the serrations is lower than the crest of the thread. The protrusions are located on the screw shank, with multiple protrusions spiraling upwards from the side near the serrations to the end of the thread away from the screw tip, with a helix angle of 60°. The protrusions are hemispherical, with a flat plane at the end away from the screw shank surface, the height of which is less than the crest height of the thread. The invention also provides a die for cutting a self-locking screw, wherein a stationary die and a movable die form the protrusions through recessed points, and the serrations are formed by the serrations.

The utility model relates to the technical field of fastening connecting pieces, in particular to a traceless high-strength pressing rivet screw which comprises a stud and a head portion which are coaxially arranged, the outer wall face of the head portion is in an inclined shape, the outer wall face gradually inclines towards the side close to the central axis in the pressing-in direction of the head portion, and therefore it is guaranteed that in the pressing-in process of the pressing rivet screw, the outer wall face of the head portion gradually inclines towards the side close to the central axis. Finally, traceless embedding is realized, and the aesthetic property is ensured. The spline teeth are uniformly distributed on the outer wall surface of the head part, so that the pressing rivet screw can be completely embedded, the safety can be ensured in an application scene, and accidents caused by protruding of the screw head are avoided; and meanwhile, interference in space can be reduced, and normal assembly and operation of all components are ensured. The extrusion component is arranged between the stud and the head part, so that a workpiece between the stud and the head part is extruded to deform and is embedded into the annular concave part in the embedding process of the pressing rivet screw, the phenomenon that the workpiece warps upwards is avoided, the screw is prevented from axially loosening, and the connection tightness is ensured.

This utility model discloses a paint dispersion device for paint production, relating to the field of paint production technology. The paint dispersion device includes anchor bolts with a frame threaded onto them. A dispersion container is fixedly connected to the middle of the frame. A support plate is fixedly installed on one side of the dispersion container, and a motor is fixedly connected to the support plate. An output shaft is fixedly connected to the output end of the motor. In this paint dispersion device, a first bevel gear drives a first transmission shaft and a second transmission shaft to rotate in opposite directions via a second bevel gear and a third bevel gear. The first and second stirring blades, fixedly connected to the second transmission shaft, begin to rotate and stir, performing dispersion work. The double-layer stirring blades ensure more thorough dispersion of the material. The serrated blades, fixedly connected to the first transmission shaft, disperse the bottom sediment, preventing material accumulation and incomplete dispersion, thus improving the dispersion effect of the raw materials and ensuring the subsequent use effect.

The invention belongs to the technical field of saw blade sawtooth passivation treatment, and discloses saw blade sawtooth passivation treatment equipment which comprises a bearing plate, a sliding frame is arranged at the top of the bearing plate in a sliding mode, two rapid locking assemblies are arranged on the inner side of the upper end of the sliding frame, and each rapid locking assembly comprises a rotating frame. The middle of the rotating frame is rotationally provided with an adjusting disc, the inner side of the adjusting disc is provided with three sets of arc-shaped guide grooves, the inner side of the adjusting disc is provided with three sets of elastic grooves, and one side of the interior of the rotating frame is provided with a fixing block. According to the saw blade clamping device, the clamping structure can be adjusted in a rotating mode to clamp a saw blade, meanwhile, the saw blade is limited through the outwards-extending locking block and prevented from falling off, saw blades with different diameters can be flexibly locked through the rapid locking assembly, and meanwhile the clamping stability is effectively improved.

A serrated panel includes an attachment section having a leading edge, an attachment surface for connecting to a trailing edge of a rotor blade, a rear end, an external surface opposite the attachment surface, and a plurality of teeth. Each tooth has a tip, a base arranged at the rear end, a longitudinal axis extending from the base to the tip, a pressure side surface, and a suction side surface. The external surface of the attachment section for each tooth has a transition surface forming a transition between the leading edge and the pressure side surface. A longitudinal section in a first plane perpendicular to the attachment surface extends along the longitudinal axis of the tooth. The transition surface has a forward, concave section and a rearward, convex section. The forward, concave section is arranged nearer to the leading edge of the attachment section than the rearward, convex section.

The utility model provides a kind of structure joint rust removal tool, including a strip metal band, the middle part of the strip metal band is provided with a plurality of one-way teeth on both sides along the length direction, forms rust removal face, and a plurality of serrations are set to the long edge of the strip metal band corresponding to the edge section of rust removal face, form slit edge, and the both ends of the strip metal band form holding section.The utility model is simple in structure, low in processing cost, and convenient for maintenance personnel to clean the rust of steel structure construction joint efficiently, meet the demand of maintenance operation.

The utility model provides a cutter. The cutter comprises a cutter body and a hard layer, wherein the hard layer is formed at the lower end part of the cutter body in the height direction and is used as a cutting edge part of the cutter; wherein a cutting edge of the cutting edge part is provided with a concave-convex structure extending in the length direction, and the surface of the concave-convex structure is provided with a plurality of micro protrusions. According to the cutter disclosed by the utility model, the cutting edge part of the cutter is formed by the hard layer, the cutting edge of the cutting edge part is provided with the concave-convex structure along the length direction of the cutter, and the surface of the concave-convex structure is provided with the plurality of micro bulges, so that the cutter can obtain good sharpness due to the cutting edge of the hard layer with certain hardness; compared with a cutter cutting edge with a micro sawtooth structure, the cutting edge is further provided with a multi-stage tooth-shaped structure, under the assistance of the concave-convex structure, the micro protrusions can cut food materials more easily, and therefore the lasting sharpness performance of the cutter can be further improved.

The utility model relates to a kind of blade assembly and hedge trimmer for hedge trimmer, blade assembly includes first blade and second blade, first blade and second blade overlap arrangement, first blade can be linear reciprocating motion along the length direction of itself relative to second blade, the side edge of first blade is spaced apart and provided with a plurality of first sawtooth along the length direction of itself, the side edge of second blade is spaced apart and provided with a plurality of first matching tooth along the length direction of itself, first matching tooth and first sawtooth can be matched staggered;Wherein, the two sides of first sawtooth are outwardly convex and formed with convex arc, the two sides of first matching tooth are inwardly concave and formed with concave arc, the curvature radius R1 of convex arc is equal to the curvature radius R2 of concave arc.The utility model is characterized in that: the cutting resistance of blade assembly is small, blade wear distribution is balanced, and the energy consumption fluctuation of hedge trimmer is relatively reduced.

Provided is a circular saw blade capable of improving chipping resistance of a cutting edge and improving discharging performance of cutting chips.　It has been found that the chipping resistance of the cutting edge is improved by providing a rake face 31 having a negative rake angle, forming the rake face into multiple stages (31a, 31b), and recessing both end parts in the blade thickness direction of the rake face 31b rearward in the rotating direction. Furthermore, by providing a breaker 34 having a positive rake angle in the vicinity of the rake face 31, discharge of generated chips is promoted, and damage to the cut surface caused by the chips can be suppressed while ensuring the chipping resistance of the cutting edge.

The invention relates to the technical field of lock ring machining, in particular to a sawtooth-shaped lock ring machining device which comprises an upper tool, a lower tool, a lower tool, a lower tool, a lower tool and a clamping device. The lower tool comprises a limiting section and a positioning section fixed to the lower portion of the limiting section, the limiting section is provided with a containing groove used for containing the lock ring, the groove bottom of the containing groove is provided with a through hole vertically and downwards penetrating through the limiting section and the positioning section, and the through hole is located under the mounting hole; the fixing seat is used for fixing the position of the lower tool; the internal tooth broach comprises a cutting part and a cylindrical rod body, and the cutting part is arranged in the middle section of the rod body. According to the scheme, the problem that when sawteeth on the inner side of the sawtooth locking ring are machined at present, an inner tooth broach is likely to be broken due to inclination of the inner tooth broach is solved.

This invention provides a behavioral analysis stage based on the principle of infrared gratings. An adjustment bracket is located at one end of the base along the Y-axis, and a first adjustment serration structure is provided on the adjustment bracket along the Z-axis. An adjustment bracket is located at the other end of the base along the Y-axis, and a second adjustment serration structure is provided on the second adjustment bracket along the Z-axis. A first detection grating has a first left-limiting serration structure at one end along the Y-axis and a first right-limiting serration structure at the other end. A second detection grating has a second left-limiting serration structure at one end along the Y-axis and a second right-limiting serration structure at the other end. This invention achieves height adjustment of the two detection gratings through the serration structure, enabling higher adjustment accuracy and facilitating the disassembly of the detection gratings.

A saw tooth (2a;2b;2c;2d;2e;2f;2g) and a saw blade (1a;1b;1c;1d;1e;1f;1g) comprising one or more of said saw teeth (2a;2b;2c;2d;2e;2f;2g), wherein said band saw teeth (2a;2b;2c;2d;2e;2f;2g) comprises a first tooth face part (9a;9b;9c;9d;9e;9f;9g) arranged at a first hook angle (β;β') and a second tooth face part (13a;13b;13c;13d;13e;13f;13g) arranged at a second hook angle. The first hook angle (β;β') is different from the second hook angle (γ;γ'). Preferably the fist hook angle (β;β') is higher than or equal to 36°.