77results about How to "Uniform strength" patented technology

The invention relates to the field of metal powder forming, in particular to a metal powder forming device for gear production. According to existing equipment, dead corners of a die are difficult to fill with metal powder, the phenomenon that the metal powder on the inner surface layer of the die is virtually full is easily caused, then the strength of a pressed and formed gear is uneven, and the quality of the pressed and formed gear is affected. A metal powder forming device for gear production comprises a base. The fixing frame is fixedly connected to the base. Due to the fact that the moving wall moves upwards, the space between the moving wall and the mold is enlarged, and the space between the moving wall and the mold can be completely filled with excessive metal powder. And when the vibrator is started, the metal powder can be directly vibrated, so that dead corners between the moving wall and the mold are uniformly filled with the metal powder, the strength of the pressed and formed gear is uniform, and the quality of the pressed and formed gear is improved.

The invention relates to the field of descaling technologies, in particular to a variable-frequency electromagnetic-resistance descaling device which comprises a descaling device body. The electromagnetic coil comprises a first cable used for being wound to the outer side of the pipeline side by side; the fixing assemblies are arranged on the outer side wall of the pipeline, and one fixing assembly is arranged on each of the two sides of each electromagnetic coil and used for fixing the positions of the electromagnetic coils; the supporting seat is arranged on one side of the electromagnetic coil and connected to the fixing assembly; the telescopic tensioning mechanism is arranged between the first cable and the supporting base and used for being connected with the first cable and automatically exerting pulling force on the first cable to conduct tensioning treatment so that the first cable can be tightly attached to the side wall of the pipeline. The device has the effects that the cable wound on the side wall of the pipeline generates adaptive change after being influenced by temperature, the intensity of an electromagnetic field generated by the electromagnetic coil is kept uniform, the effect of removing a scale layer is enhanced, the energy consumption and the cost are reduced, and the operation stability of the descaling device is improved.

The invention relates to the technical field of degradable flowerpots, in particular to a plant fiber mould pressing flowerpot and a manufacturing method of the plant fiber mould pressing flowerpot. 10 to 20 parts of a composite binder; wherein the plant fiber comprises at least one of straw and wheat straw, and the length of the straw and the wheat straw is 5-10 mm; the composite binder comprises the following components in parts by weight: 60-80 parts of modified urea-formaldehyde resin; 15 to 25 parts of epoxy resin; according to the plant fiber flowerpot, the plant fiber flowerpot with the height of 15 cm or above is successfully manufactured, and the industry blank is filled up; balanced strength distribution from bottom to top is achieved through fiber orientation and gradient density forming. The composite binder system obviously reduces the water absorption rate of the flowerpot and prolongs the service life of the product; the degradation speed is accurately controlled by regulating and controlling the ratio of the plant fibers to the binder.

The invention discloses an arc-shaped formwork traction device with an automatic positioning function, and relates to the technical field of bridge construction.The arc-shaped formwork traction device comprises a crane, a traction device body, a first steel cable and a second steel cable, the crane can drive the traction device body to move, the traction device body is made to move to a designated position, and the first steel cable is connected with the second steel cable; the traction device can clamp the arc-shaped formwork, when the arc-shaped formwork is driven to move in the air, the gravity center of the arc-shaped formwork can be automatically adjusted, the arc-shaped formwork is kept in a horizontal state when lifted, the arc-shaped formwork can conveniently reach the designated position, and the situation that the arc-shaped formwork collides with a steel reinforcement framework and other preassembled parts due to deviation in the moving process is avoided; and meanwhile, automatic positioning can be achieved, it is guaranteed that the strength of all parts of the bridge pier is uniform when the bridge pier is poured, the service life of the bridge pier is prolonged, the first steel cable can drive the traction device to clamp and loosen the arc-shaped formwork, and the second steel cable can drive the traction device to ascend and descend.

The invention relates to the technical field of conveying belts, and particularly discloses a halogen-free rubber conveying belt sizing material and a preparation method thereof. The invention relates to a halogen-free rubber conveyer belt rubber material, which comprises the following raw materials by weight: 15-25 parts of natural rubber; 45-55 parts of styrene butadiene rubber; 25-35 parts of butadiene rubber; 50 to 100 parts of a halogen-free flame retardant; 50 to 80 parts of filler; 2-5 parts of a vulcanizing agent; 5-15 parts of an auxiliary agent; the halogen-free flame retardant comprises ammonium polyphosphate, magnesium hydroxide, zinc borate, melamine phosphate, a flame retardant MB202 and diphenyl isooctyl phosphate. The preparation method comprises the following steps: S1, preparing raw materials; and S2, preparing the rubber material. The halogen-free rubber conveying belt rubber material can be used for conveying conveying belts of materials in the fields of coal, mines, metallurgy, chemical engineering and the like, and has the advantages of high temperature resistance, high mechanical property, long service life and the like.

The invention relates to the technical field of semiconductor device manufacturing process, in particular to a double-layer nested random single-sided microlens array and a manufacturing method thereof; by forming wet etching starting depths of different heights, two sets of microlens arrays with significantly different vector heights and virtual focal points are processed, the two sets of microlenses are mutually nested to form a complete and continuous microlens array, randomness of different heights between the microlenses is introduced, the conditions for generating a small amount of interference lattices are destroyed, the interference lattices are eliminated, and a flat-top homogenized light spot with completely uniform light spot intensity is realized; and by utilizing the isotropic etching characteristics of the wet etching process, the microlens array can be processed without adjusting etching parameters during the etching process, the process is simple, and the cost is saved.

The utility model provides a kind of battery shell and battery, battery shell includes first surface and with the second surface and third surface of first surface adjacent and located in the opposite sides of first surface, wherein first surface is connected with second surface, third surface by bending surface, it is provided with explosion-proof piece on first surface, the connecting position of bending surface and first surface forms bending edge line, its minimum distance from the edge of explosion-proof piece is D, by minimum distance D dynamic correlation shell wall thickness, and fusion explosion-proof piece length-width ratio and process coefficient construct distance model, eliminate the welding cracking of first welding after bending and the rebound deformation risk of first bending after welding, inhibit the fluctuation of burst pressure;Through the system integration of thin-walled steel shell and accurate explosion-proof distance, realize the essential promotion of space utilization and thermal safety performance, synchronous optimization battery energy density and anti-thermal diffusion capacity.

The utility model discloses a microwave drying device with a rotating function, which belongs to the technical field of microwave drying equipment and comprises a first conveying component, a main box body, a rotating component and a second conveying component. The microwave drying device with the rotating function has the advantages that heating is even, drying efficiency is improved, and impurities are separated and screened, the drum screen can be driven to rotate by controlling the arranged driving motor, so that agricultural and sideline products entering the drum screen can rotate in the drying process, and the drying efficiency is improved. By means of the device, microwave energy can be evenly distributed to all parts of products, the problem of uneven drying is avoided, it is guaranteed that all the products can obtain the same drying time and intensity, the more even drying effect is achieved, and compared with traditional linear conveying drying, the device can enable the products to stay for a longer time, and the drying efficiency is improved. The drying time is prolonged, the drying opportunity is increased, the requirement for secondary drying is reduced, the drying efficiency is improved, and time and labor cost are saved.

The present invention relates to the technical field of comprehensive utilization of phosphogypsum, and provides a method for preparing a self-hardening spherical cement retarder using twin crystalline phosphogypsum, wherein the twin crystalline phosphogypsum containing both calcium sulfate dihydrate and calcium sulfate hemihydrate is produced by controlling the wet phosphoric acid process, and the twin crystalline phosphogypsum is re-pulped, washed and improved to form balls, and then naturally hardened to obtain a spherical retarder. The present invention fully combines the green and low-energy wet phosphoric acid process advocated by the industry and the gelling effect of calcium sulfate hemihydrate itself, and obtains a spherical cement retarder with low impurity content and good fluidity without adding cement, steam curing, or turning the pile, which has significant significance for the green functional utilization of phosphogypsum.

The application discloses a microstructure sample detection device and a detection method thereof, and belongs to the technical field of microstructure sample detection. The microstructure sample detection device comprises an imaging light path, a scanning motor and a long working distance parallel light path. The imaging light path is used for placing a microstructure sample. The scanning motor is used for axially moving the sample along a direction perpendicular to the microstructure sample, so that light field scanning is performed. The long working distance parallel light path is used for projecting single parallel illumination light on the microstructure sample in a reflection or transmission mode. The parallel light path comprises a beam expander and shaper lens group, a selected area diaphragm and a relay lens group. The beam expander and shaper lens group has an incident end and an exit end. The incident end is aligned with a light source. The selected area diaphragm is aligned with the exit end. The relay lens group comprises a front lens and a rear lens arranged on the same optical axis. The front lens is aligned with a diaphragm hole of the selected area diaphragm. The rear lens is aligned with the microstructure sample. A sample surface of the microstructure sample is object image conjugate with the selected area diaphragm, and the image side is telecentric. The application solves the problem that the existing light field scanning detection method cannot accurately detect optical parameter information of a sample.

The invention relates to the technical field of signal processing, and provides a multichannel signal control method, device and equipment and a storage medium, and the multichannel signal control method comprises the steps: controlling pulse signals on a plurality of channels, and synchronously generating an electrical stimulation signal for each channel; electric stimulation signals of all channels at the current moment are collected in real time; determining the intensity of each electrical stimulation signal at the next moment according to the intensity of each electrical stimulation signal at the current moment; adjusting the transmission time and phase of each electrical stimulation signal based on preset parameters; and if the transmission time and phase of each electrical stimulation signal are consistent, outputting each electrical stimulation signal as a target electrical stimulation signal. The intensity of the electrical stimulation signal of each channel at the next moment is determined according to the intensity of the electrical stimulation signal of each channel at the current moment, so that the signal intensity of each channel is kept uniform, and the signal synchronization of each channel is realized by adjusting the transmission time and phase of each electrical stimulation signal based on preset parameters.

The invention discloses C200 ultra-high performance concrete which comprises the following components: a cementing material, fine aggregate, a polycarboxylic acid water reducer, steel fibers, carbon fibers and water, the cementing material is prepared from the following components in parts by weight: 64 to 68 parts of Portland cement, 10 parts of fly ash microbeads, 14 to 16 parts of silica fume and 6 to 10 parts of carbide slag; the addition amount of the polycarboxylic acid water reducer is 1.5-1.7% of the total weight of the cementing material; the mixing amount of the steel fibers is 2.0-3.0% of the total volume of the concrete, and the mixing amount of the carbon fibers is 0.3-1.0% of the total volume of the concrete; the water-binder ratio of the concrete is 0.14 to 0.18; the weight ratio of the cementing material to the fine aggregate is (0.9-1.1): 1. Through the synergistic effect of excitation of the high-activity carbide slag, hybrid reinforcement of the steel fiber and the recycled carbon fiber and gradation of the aggregate, the 7d strength which is larger than or equal to 200 MPa is successfully prepared, the concrete further has excellent toughness which is difficult to achieve by single steel fiber ultra-high performance concrete, and unification of ultra-high strength and ultra-high toughness is achieved.

The present invention discloses a projection imaging device, a method for using the projection imaging device, and a liquid crystal light valve system, wherein the projection imaging device includes a receiving module, a generating module, and a projecting module; the receiving module is used to receive the user's instruction information; the generating module is used to generate a corresponding specific image according to the instruction information; the projecting module is used to project the specific image. The purpose of the present invention is to provide a projection imaging device, a method for using the projection imaging device, and a liquid crystal light valve system. Compared with Gaussian laser, the projection beam of the projection device has the advantages of uniform beam, wide beam spectrum, adjustable intensity of each part, and no scattered light spots.

The utility model relates to a magnetic steel structure used for a motor, comprising a plurality of magnetic steel bodies fixed on a magnetic conductive block, the pole-arc coefficient of the magnetic steel bodies is less than 1, the magnetic steel bodies are provided with gaps, and the plurality of magnetic steel bodies are continuously fixed on the magnetic conductive block; the plurality of magnetic steel bodies comprise a plurality of first magnetic steels and a plurality of second magnetic steels, the first magnetic steels and the second magnetic steels are adjacently and closely arranged, the gaps in the first magnetic steels are first gaps, and the gaps in the second magnetic steels are second gaps; the total area of all the first notches in the first magnetic steel is equal to the total area of all the second notches in the second magnetic steel. Compared with the prior art, the gap is arranged on the magnetic steel body, so that the magnetic steel body can be continuously and fully attached to the magnetic conductive ring on the premise that the pole-arc coefficient is less than 1, that is, every two magnetic steel bodies are tightly attached, and the adhesive force between every two adjacent magnetic steel bodies is increased; the use amount of the magnetic steel is saved on the basis of maintaining or improving the performance of the motor, and the installation stability of the magnetic steel is ensured.

The present invention discloses a prestressed concrete transverse web type support for an electrified railway contact network, comprising ultra-high performance concrete and a plurality of arch frames, wherein the plurality of arch frames are cast in the ultra-high performance concrete from bottom to top, wherein the arch frame comprises two groups of arch structures, wherein the arch structure comprises an annular frame and two V-shaped frames, wherein the two V-shaped frames are respectively fixed at the two ends of the annular frame, and the two V-shaped frames are symmetrical about the center of the annular frame, wherein the two groups of arch structures are arranged in parallel and fixedly connected by a plurality of vertical short bars, and the central axes of the annular frames of the two groups of arch structures are both located on the same vertical line. The present invention improves the overall strength and rigidity of the transverse web type support, and evenly distributes the force, so as to control the occurrence of cracks at the source of the structural design.

The utility model discloses an inductive heating ring with good uniformity, which comprises a heating ring main body and two electrode connecting rods electrically connected with the heating ring main body. The heating ring main body is composed of two circular ring bodies. The two circular ring bodies are coaxial and have the same diameter. The inner ring surface of the circular ring body is located on the same circumference to ensure that the distance between the inner ring surface of the heating ring main body and the surface of the workpiece is the same everywhere. The inductive heating ring effectively avoids the problems of local overheating or insufficient heating caused by the traditional concave-convex ring surface, makes the hardness distribution of the corrugated roller tooth part uniform, and significantly improves the wear resistance and service life of the corrugated roller. Meanwhile, uniform heating reduces heat treatment defects, improves the production qualification rate of the corrugated roller, and reduces the cost of rework. Moreover, it is not necessary to repeatedly adjust the heating parameters, which simplifies the operation process and improves the production efficiency of the heat treatment of the corrugated roller.

The invention provides continuous pressing equipment for water permeable brick production, which comprises a mold mechanism and a hydraulic cylinder arranged at the top end of the mold mechanism and is used for extruding the mold mechanism; the material pushing assembly is arranged at one end of the mold mechanism and used for conveying raw materials into the mold mechanism; wherein a jacking assembly is arranged at the bottom end of the mold mechanism, the jacking assembly is used for jacking extruded and formed finished products, a material box is driven by an arranged high-precision air cylinder, so that when the material box moves to the upper surface of a mold, the material box can do reciprocating motion under the movement of the air cylinder, and the material box is driven by the air cylinder to do reciprocating motion; and the jacking assembly moves up and down, the feeding amount of the raw materials in the material box can be accurately controlled in a shaking mode through the reciprocating motion of the jacking assembly and the air cylinder, accurate control over feeding of the raw materials is optimized, the thickness and strength of the water permeable bricks are more uniform, the water permeability performance of the water permeable bricks is further improved, and the service life of the water permeable bricks is further prolonged.

The utility model discloses an energy-saving rake dryer, which particularly relates to the technical field of dryers, and comprises a dryer shell, a fixing frame arranged on the outer side of the dryer shell, a feeding cylinder arranged on the top of the dryer shell, a discharging cylinder arranged at the bottom of the dryer shell, a jacket arranged on the inner wall of the dryer shell, a conveying mechanism arranged inside the feeding cylinder, and a discharging cylinder arranged at the bottom of the dryer shell. A stirring mechanism is arranged on one side of the drying machine shell and comprises a first motor arranged on one side of the drying machine shell, a rotating rod is arranged at the output end of the first motor, and one end of the rotating rod extends into the drying machine shell. According to the utility model, materials in the drying machine shell can be uniformly stirred, and the resistance can be reduced when the materials on the inner wall of the drying machine shell are scraped, so that the materials adhered to the inner side wall of the drying barrel can be scraped more cleanly, the energy consumption is reduced, and the energy-saving property of the device is improved.

The utility model discloses an extrusion device convenient for uniform stress, which belongs to the technical field of plate extrusion, and comprises a placing plate, four corners of the placing plate are respectively and fixedly connected with a first electric push rod, the top of each first electric push rod is fixedly connected with a connecting block, and a linkage plate is fixedly connected among the four connecting blocks. According to the extrusion device facilitating uniform stress, a first electric push rod can be started to drive a connecting block and a linkage plate to press downwards, at the moment, the linkage plate can push a telescopic rod, a buffer spring and an extrusion plate at the bottom to extrude an integrated wallboard, and at the moment, the extrusion plate can extrude the telescopic rod and the buffer spring; the force applied by the extrusion plate to the integrated wallboard is uniformly distributed under the elastic action of the buffer spring, and the situation that local stress of the wallboard is too large or too small in the extrusion process is avoided, so that it is guaranteed that the density and strength of the wallboard are uniform and consistent, and the product quality is improved.

The application discloses a steam turbine moving blade root weight-reducing structure, a steam turbine moving blade and a manufacturing method thereof. The steam turbine moving blade root weight-reducing structure comprises a fir-type blade root and a blade root intermediate body connecting a blade body and the fir-type blade root, and a weight-reducing groove is arranged on the inner arc side of the blade root intermediate body. The opening area of the weight-reducing groove accounts for 60%-40% of the area of the inner arc side without the weight-reducing groove. After the assembly of adjacent blades is completed, the contact area of the inner arc side of the blade root intermediate body accounts for 40%-60% of the contact area of the inner arc side of the blade root intermediate body without the weight-reducing groove. The application has the advantages that the average stress level of the blade root area can be effectively reduced, the manufacturing cost of the blade is reduced, the processing difficulty of the blade is not increased, the blade root weight can be reduced, the strength and rigidity of the blade root can be effectively ensured, and the like.

The utility model discloses a xenon lamp aging testing machine, which comprises a case, an aging structure and a heat dissipation structure, the aging structure is arranged on the case, the heat dissipation structure is arranged on the case, the aging structure comprises an irradiation unit, a rotating unit and a heating unit, the irradiation unit is fixedly arranged on the side wall of the case, and the rotating unit is fixedly arranged on the side wall of the case. The rotating unit is arranged at the bottom of the case and located in front of the irradiation unit, and the heating units are arranged at the bottom of the case and located on the two sides of the rotating unit. The utility model belongs to the technical field of aging equipment, particularly relates to a xenon lamp aging tester, and effectively solves the problems that light rays emitted by a xenon lamp light source of the xenon lamp aging tester are not uniformly distributed, and a sample is fixedly placed, so that the illumination intensity on the surface of the sample is not consistent, and the accuracy of a test result is influenced.

The invention belongs to the technical field of extrusion coatings, and particularly relates to a tubular low-density polyethylene composition for an extrusion coating and a preparation method of the tubular low-density polyethylene composition. The low-density polyethylene composition is prepared from the following raw materials in parts by weight: 90 to 95 parts of low-density polyethylene, 5 to 10 parts of ethylene-vinyl acetate copolymer, 0.05 to 0.10 part of grafting agent, 0.005 to 0.010 part of initiator and 0.05 to 0.10 part of antioxidant, and the sum of the parts by weight of the low-density polyethylene and the ethylene-vinyl acetate copolymer is 100. The low-density polyethylene composition disclosed by the invention has good tensile and adhesive properties, can be processed at a high speed, is relatively small in shrinkage, and overcomes the defects of poor adhesion and large shrinkage of LDPE (Low-Density Polyethylene) of an original tubular method.

The utility model relates to vehicle rain test device technical field, concretely relates to a track traffic vehicle rain test device, including setting up at the rain position of test car body and spraying pipe, install a plurality of spray heads on spraying pipe, still include: circulating water storage part, including the water storage tank that has installed filter screen inside, and the backflow diversion hopper that installs in the water storage tank is conducted through, the water storage tank bottom is conducted through the installation of guide valve pipe, adsorption filter box, guide valve pipe and water pump in proper order through drain pipe, and the water pump outlet is conducted through the outlet valve pipe and spraying pipe connection, and the circulating water storage part that is equipped can provide the water for rain test, can realize multistage filtration through filter screen and detachable installation adsorption filter box to circulating backflow water body, can reduce the impurity content in water body, reduces or avoids the problem that circulating water body blocks spraying pipe and spray head, reduces the failure rate, is favorable to guarantee that spraying pipeline obtains pressure stability, and spraying intensity and flow even spraying effect.

The invention relates to an immersed thermal conditioning system (1) for a battery (3) of a motor vehicle, comprising a control unit (11) configured to monitor the effectiveness of the thermal conditioning to ensure correct operation of the battery (3).

The present invention belongs to the technical field of clothing processing devices, and discloses a lifting rib for a clothes dryer and a clothes dryer, wherein the lifting rib comprises a shell having a hollow chamber, an air outlet is provided on the shell, and an air blowing pipeline assembly is arranged in the hollow chamber; the air blowing pipeline assembly is connected to the shell, and blows air to the outside of the shell through the air outlet on the shell. The lifting rib of the present invention can blow air to the outside of the lifting rib through the internal air blowing pipeline assembly, and can blow away the clothes covered on the lifting rib, thereby preventing the clothes from being entangled during the drying process, improving the drying efficiency of the clothes, and reducing the generation of wrinkles during the drying process of the clothes.

The invention discloses an air blower which comprises a motor body, a heat dissipation plate and a rear cover assembly covering the heat dissipation plate. The heat dissipation plate is provided with a connecting arm; the air blower further comprises a vibration reduction unit, the vibration reduction unit comprises a vibration reduction pad, the vibration reduction pad wraps the connecting arm and is attached to the connecting arm in a matched mode, and the outer wall of the vibration reduction pad abuts against the rear cover assembly. The sealing ring is arranged on the heat dissipation plate in a surrounding and sleeving manner; the outer wall of the sealing ring abuts against the rear cover assembly. The sealing ring and the anti-vibration pad are made of flexible materials and can absorb vibration generated by the rear cover assembly and the heat dissipation plate. The sealing ring and the anti-vibration pad can be adopted for vibration reduction at the same time, the vibration reduction area is increased, and the vibration reduction effect is improved; meanwhile, the embedded groove matched with the connecting arm in shape is formed, so that the anti-vibration pad can wrap the connecting arm so as to completely bear the connecting arm, and the anti-vibration pad is not prone to deformation.

The invention discloses a moisturizing and soothing hand cream containing jasmine extract. The hand cream of the scheme comprises extracts of pure natural plants, especially the jasmine extract is included in the functional component. The hand cream compounded with multiple components has the characteristics of safety, mildness and non-irritation. Compared with the existing hand cream, the hand cream of the scheme not only has the effect of moisturizing and hydrating, but also the chrysanthemum extract and the tea polypeptide extract in the raw material components can effectively improve the dry and cracked fine lines on the hands and achieve long-term repair; the thyme extract increases the expression of basal layer water channel protein APQ3, unclogs the skin water channel, and moisturizes the nails; the jasmine extract in the functional component can eliminate superoxide free radicals, and has the effects of beautifying the skin, anti-oxidation and anti-aging; and at the same time, it has strong permeability and helps other functional components to be absorbed by the skin; the amaranth extract in the functional component has a hemostatic effect, has a good promoting effect on the healing of the cut wound surface, and can prevent and treat chapped skin to a certain extent.

This utility model relates to the field of medical equipment technology, and in particular to a display screen assembly and a monitor. The display screen assembly provided by this utility model includes a first housing and a second housing arranged opposite to each other, a display screen body, an alarm light group, and a first lampshade. The second housing is connected to the first housing, and an installation gap is left between the second housing and the first housing. The display screen body is disposed on the side of the second housing away from the first housing. The alarm light group is disposed within the installation gap and includes a first lamp plate and a second lamp plate. The first lamp plate extends along the upper edge of the display screen body, and the second lamp plate extends along the side edge of the display screen body. The first lampshade is disposed at the installation gap and covers the outside of the first lamp plate and the second lamp plate. The display screen assembly provided by this utility model can realize multi-angle alarm observation, improve the visibility and reliability of alarm signals, and ensure that medical staff can detect alarm signals in a timely manner from different angles.

The invention relates to the technical field of sewing machines, in particular to an alignment type rotary sewing machine which comprises a base support and a sewing table detachably arranged on the base support. The lower cross beam is fixedly arranged on the base support and located below the sewing table, the upper cross beam is arranged at the end of the lower cross beam and extends upwards to the position above the sewing table, and a rotating shuttle wheel base penetrating through the sewing table is fixedly arranged at the other end of the lower cross beam. A rotary sewing machine head is arranged at the position, corresponding to the rotary shuttle wheel base, of the upper cross beam, during sewing, the rotary shuttle wheel base and the rotary sewing machine head rotate synchronously for sewing, and sewing threads with the same angle are obtained on the fabric.