108results about How to "Realize self-lubrication" patented technology

The invention discloses casing material of an engineering plastic joint bearing. The casing material is characterized in that the casing material comprises polyamide 6 with weight parts of 58.2 to 66.0, glass fibers with weight parts of 28.3 to 38.8, MoS2 with weight parts of 2.4 to 4.7, dispersing agent TAT with weight parts of 0.4 to 0.6, anti-oxidant 168 with weight parts of 0.1 to 0.2 and anti-oxidant 1010 with weight parts of 0.1 to 02. The invention also discloses inner sphere material of the engineering plastic joint bearing. The inner sphere material is characterized in that the inner sphere material comprises polyamide 66 with weight parts of 92.0 to 95.5, solid lubricant with weight parts of 2.5 to 4.8, bulking agent POE-g-MAH with weight parts of 1.5 to 2.4, dispersing agent TAT with weight parts of 0.4 to 0.6 and anti-oxidant 1098 with weight parts of 0.1 to 0.2. In addition, the invention also discloses a moulding method for the engineering plastic joint bearing, firstly, the inner sphere is injected, then the inner sphere is positioned into an outer casing die as an embedding part for injecting the casing, and the engineering plastic joint bearing is positioned into a baking box for final treatment after being molded through injection. By adopting the method, the production efficiency of the technically molded single product in the prior art is enhanced from 30 min to 1 min.

The invention discloses a self-lubricating sliding bearing with seamless inner surface treatment, belonging to the technical field of bearings, comprising a support seat; balls are sleeved inside the fixed frame; the outer wall of the ball and the inner wall of the outer ring body are attached to each other; There is an oil storage chamber; the side wall of the support seat is provided with a protective tube; the inside of the protective tube is penetrated with cotton thread; the inside of the protective tube is respectively provided with a first limit sleeve and a second limit sleeve; the outer wall of the second limit sleeve There is an adjustment knob in the screw connection; the cotton thread runs through the inside of the first limit sleeve and the second limit sleeve; the top of the cotton thread extends into the inside of the fixing plate; the outer wall of the fixing plate is provided with a sponge pad; the side wall of the support seat and the storage A filling cap is provided at the opposite position of the oil chamber. The self-lubricating sliding bearing of the present invention can stably and evenly apply lubricating oil to each ball to realize self-lubricating of the bearing.

The invention relates to a structure capable of achieving self-lubricating on a tool surface. A tool can be a medical operation tool, a cutting tool or a domestic tool. According to the self-lubricating structure, specifically, a series of groove structures are machined on the surface of the tool according to certain rules, by utilizing capillary force of the groove structures, liquid is guided to be directionally transported, a liquid film is formed, so that the tool surface is wetted and lubrication and cooling effects are achieved, and adhesion is reduced. The groove structures comprise but not limited to wedge grooves, trapezoid grooves, dovetail grooves, taper grooves and height gradient grooves. According to the structure capable of achieving self-lubricating on the tool surface, by utilizing the capillary force in the grooves, the liquid is guided to be directionally transported, the liquid film is formed, sustainable self-lubrication of the tool surface is achieved, and lubrication and anti-adhesion are achieved; and tissue adhesion in the operative process is reduced, the durability of the cutting tool is improved, and the domestic tool is convenient to use.

A three-freedom-degree transmission mechanism comprises a helical pair, a revolute pair and a cylindrical pair. The axis of the helical pair is perpendicular to the axis of the revolute pair, and the axis of the revolute pair is parallel to the axis of the cylindrical pair. The revolute pair comprises a support (7), a movable sliding block (5), the helical pair (3), a nut (4), a left limiting block (1) and a right limiting block (6). The left limiting block (1) and the right limiting block (6) are fixedly arranged on the support (7), and the helical pair (3) is provided with the movable sliding block (5). The transmission mechanism is characterized in that the helical pair (3) mounted on the support (7) and the revolute pair can form 0-degree to 180-degree intersection angles through the movable sliding block (5). According to the transmission mechanism, under the condition of identical number of rotation of a screw rod, the speed of the straight line motion (opening and closing) of the nut (a door leaf) is improved. The mechanical locking of a vehicle door is achieved without another set of mechanical locking mechanism. The transmission mechanism is simple, the motion procedures of unlocking and locking are removed, procedure control is simplified, and two fault hazards are eliminated.

The invention discloses an articulation method of a fixed articulation of a low-floor vehicle and an articulation device of the fixed articulation. The articulation method of the fixed articulation of the low-floor vehicle comprises the steps of firstly assembling metal spherical plain bearing in the fixed articulation of the low-floor vehicle into a whole, connecting the integral metal spherical plain bearing with an upper fixed support of a vehicle body through first connecting pieces and connecting the integral metal spherical plain bearing with a lower fixed support of another vehicle body through second connecting pieces so as to connect the adjacent two vehicle bodies. The articulation method of the fixed articulation of the low-floor vehicle and the articulation device of the fixed articulation change a center pin structure connection method in the prior art, and can not only meet the running requirement of the low-floor vehicle, but also allow the articulation device of the whole fixed articulation to be simple and compact in structure, thereby decreasing the demand for installation space, reducing the difficulty of assembly and disassembly of the whole fixed articulation and reducing the difficulty of maintenance.

The invention relates to a limiting adjusting device for the opening of a cartridge valve. The limiting adjusting device for the opening of the cartridge valve comprises a shell, a driving mechanism, a main shaft, a limiting ejector rod, a valve plug and a valve sleeve, wherein the driving mechanism is fixedly connected with one end of the main shaft, the other end of the main shaft is connected with one end of the limiting ejector rod through a thread transmission pair, the other end of the limiting ejector rod is inserted into a control cavity of the valve plug, and a rotation stopping mechanism is arranged between the shell and the limiting ejector rod. Pilot hydraulic oil enters the control cavity of the valve plug through an oil circuit on the shell, the limiting ejector rod is completely immersed in the hydraulic oil in the control cavity of the cartridge valve, and the borne hydraulic pressure can automatically achieve the balance; all bearings and the thread transmission pair arranged between the main shaft and the limiting ejector rod are immersed in the oil, self lubrication is achieved, the service life of the components is prolonged, and adjusting accuracy of the components is improved.

The invention discloses a vertical-axis shaft water flow power generation device and a testing system. The vertical-axis shaft water flow power generation device comprises an impeller, a floating supporting platform, a speed increaser and a power generator, wherein the impeller is composed of blades, blade frames and an impeller spindle; the blade frames are welded with the impeller spindle and are uniformly distributed along the impeller spindle radioactively in an equal part; the blades are hinged to the corresponding blade frames through corresponding hinges; the power generator is installed on the floating supporting platform; and an input shaft of the power generator is connected with an output shaft of the speed increaser. The vertical-axis shaft water flow power generation device is characterized in that a rotary support bearing is installed on the floating supporting platform; and the upper end of the impeller spindle is fixed in the rotary support bearing, sequentially passes through a universal coupling and a gear coupling and is connected with an input shaft of the speed increaser. The vertical-axis shaft water flow power generation device is light in weight, convenient in installation, better in starting and braking characteristics, strong in adaptation to environment and high in power generation efficiency.

The invention relates to a double-tooth-difference cycloidal gear pump. The double-tooth-difference cycloidal gear pump comprises a pump base, a pump cover, a pump shaft, an internal rotor and an external rotor. The pump base and the pump cover are connected and combined into a sealed housing; the internal rotor and the external rotor are arranged inside the housing; the number of teeth of the internal rotor is at least 5, and the external rotor has two more teeth than the internal rotor; the internal side surface of the pump base is provided with a crescent plate; the pump cover is provided with an oil suction inlet and an oil pumping inlet. The double-tooth-difference cycloidal gear pump is an improvement on the basis of a one-tooth-difference cycloidal gear pump, achieves self-lubrication and meanwhile has the advantages of being small in size, light in weight, large in flow and high in reliability.

The invention discloses a retainer-free surface micro-texture self-lubricating cylindrical roller bearing with an isolator. A traditional continuous retainer is removed, a novel discrete isolator is utilized for isolating all cylindrical rollers, the isolator is outwards pushed due to the centrifugal action during high-speed rotation, and line contact and rolling friction exist between the isolator and the cylindrical rollers, so that the sliding friction generated by the original retainer is eliminated, the frictional wear inside the bearing is reduced, and the limit rotating speed is increased; and micro-structure meshes or pits are machined on the surfaces of the cylindrical rollers for storing oil or a lubricating agent, so that the self-lubricating purpose is achieved by utilizing thehydrodynamic effect and the thermal expansion and cold contraction principle in the bearing working process. Compared with a traditional cylindrical roller bearing, the retainer-free surface micro-texture self-lubricating cylindrical roller bearing has the advantages of being low in friction, high in rotating speed, small in temperature rise, long in service life and self-lubricating; and the self-lubricating cylindrical roller bearing is simple in structure and has good practical value in heavy-load high-rotating-speed mechanical equipment.

The invention discloses an antiroll torsion bar fatigue test device and method. The antiroll torsion bar fatigue test device comprises a platform, a force application device, a double-cross beam levermechanism and adjustable supporting devices; the right end of the double-cross beam lever mechanism is connected with the force application device; and the adjustable supporting devices are mounted on the front side and the rear side near the left end of the double-cross beam lever mechanism. The midpoints of two side roll cross beams arranged in pairs side by side in a front-back manner are hinged to the same rotating support; an antiroll torsion bar is connected between the bottom surface of each side roll cross beam and the platform; antiroll torsion bars are connected among the side rollcross beams, the adjustable supporting devices and the platform; and a load is applied to the right end of each side roll cross beam, thereby simulating real working conditions for carrying out a single-point bidirectional loading test on the antiroll torsion bar. By means of the fatigue test device and method, the fatigue test can be carried out on a plurality of antiroll torsion bars at the sametime, and the suspension and fixation of different types of antiroll torsion bars can be realized, so that the purpose of improving the fatigue test efficiency is achieved.

The invention discloses an orthogonal magnetic circuit radial-axial-integrated magnetic bearing based on a symmetrical self-lubricating flexible backup bearing structure. A radial magnetic bearing coil of the orthogonal magnetic circuit radial-axial-integrated magnetic bearing is mounted on a stator tooth set of a stator iron core; two radial rigid magnetic-conductive rings are mounted at an outerdisc of the stator iron core so as to prevent the short circuit problem of permanent magnetic circuits, wherein a certain gap exists between the two radial rigid magnetic-conductive rings; an axial magnetic bearing coil is located at a thrust disc of a rotor shaft and mounted in a cavity formed by the two magnetic-conductive rings; graphite rings and backup bearing skeletons which achieve the axial self-lubricating effect are arranged on the two sides of the thrust disc correspondingly; and a radial backup bearing skeleton and a graphite internal convex ring are arranged in an inner ring cavity of a radial flexible magnetic conductive ring for achieving the radial self-lubricating effect. By adopting the technical means that axial and radial electromagnetic circuits are combined into a whole, and a radial magnetic bearing and a backup bearing are combined into a whole, the technical problem that traditional magnetic bearings are low in coaxiality is solved.

The invention provides an impact-resistant and anti-rebound sliding rail which comprises a static rail and a movable rail. The static rail comprises a top plate I, a base plate I and side plates I forming a sliding groove and is provided with a static rail first end and a static rail second end, and the static rail first end is used for installing a first pulley. The movable rail comprises a top plate II, a base plate II and side plates II, the top plate II downward extends to form an upturned edge. The movable rail is provided with a movable rail first end and a movable rail second end, the movable rail first end is used for installing a second pulley, at least two protrusions playing an impact-resistant buffering effect are formed on the inner wall of the top plate II and are of asymmetric structures, and the separation distance between the two adjacent protrusions is preset. A downward protruding stop portion I is formed on the inner wall of the top plate I, an upward protruding stop portion II is formed on the inner wall of the base plate II, the stop portion I and the stop portion II are located at the second end of the static rail, and a limiting portion for preventing the movable rail from rebounding and regressing is arranged on the inner wall of the top plate I in a protruding mode and is an elastomer of an asymmetric structure.

The invention discloses a lightweight rigid self-lubricating composite rope and a preparation method thereof, and relates to the field of ropes. The lightweight rigid self-lubricating composite rope comprises a rope core (1), a wrapping layer (2) and a plastic-coated layer (3), wherein the rope core (1) is of a multilayer helical structure with a circular cross section formed by spirally interweaving ultrahigh-molecular-weight polyethylene fiber rope yarn, layers are spirally and reversely arranged, the outer portion of parallel rope yarn of each layer is provided with a composite finishing coating, the ingredients in a composite finishing liquid on the cross section of the rope core (1) account for 10-30%, the outer portion of the rope core (1) is provided with the wrapping layer (2), andthe outer portion of the wrapping layer (2) is provided with the plastic-coated layer (3). The lightweight rigid self-lubricating composite rope and the preparation method thereof have the advantagesthat the cross section of the rope is circular, the strength-to-weight ratio is high, and the rope can completely replace a steel wire rope in the fields of huge weight hoisting and well drilling exploration.

The invention relates to a novel four-link hinge assembly, which is used for connecting a car body with a car door. The hinge assembly comprises a connecting plate, a four-link hinge movable plate, a first lining rod, a second lining rod, a hinge fixed plate and a fixed plate baffle. The connecting plate is welded on the side wall stand column of the car body. The four-link hinge movable plate is connected with the connecting plate. One ends of the first lining rod and the second lining rod are movably connected with the four-link hinge movable plate. The other ends of the first lining rod and the second lining rod are movably connected with the hinge fixed plate. The hinge fixed plate is connected with the fixed plate baffle. The hinge fixed plate is fixedly connected with the car door through bolts. Compared with the prior art, the novel four-link hinge assembly has the advantages of simple structure, large opening angle, high firmness and durability, no impact, small friction, long service life and the like.

The invention relates to the technical field of bearing pedestals, in particular to a self-lubricating bearing pedestal. The self-lubricating bearing pedestal comprises a bearing pedestal main body and a bearing bush arranged in a center axial hole of the bearing pedestal main body. A lubricating ring filled with lubricating oil is arranged inside the bearing bush. The lubricating ring communicates through the outside world through balls arranged on the inner wall of the bearing bush and used for guiding liquid. The inner wall of the bearing bush is provided with a notch for installation of the balls. The upper edge of the notch is provided with a bearing wall matched with the balls. The notch communicates with the lubricating ring through a corresponding oil conveying channel, the inner wall of the lubricating ring is coated with protection paint, the lubricating ring is provided with an oil injection hole, a sealing plug is arranged in the oil injection hole, traditional opening typeself-lubricating agent filling holes are replaced with the balls for guiding liquid, and lubricating agent is prevented from flowing out. Self lubrication for a rotating shaft is achieved through theballs making rolling contact with the outer surface of the rotating shaft, therefore, friction force between the rotating shaft and the bearing bush is reduced, and the transmission efficiency is improved during self lubricating.

The invention provides a light-weight self-lubricating wear-resistant joint bearing and a preparation method thereof, and belongs to the field of design and manufacturing of joint bearings. An inner ring and an outer ring of the joint bearing adopt titanium alloys as a substrate material; firstly, a TiN transition layer, a hard coating and a soft coating are deposited on an outer spherical substrate of the inner ring in sequence; then, a TiN transition layer and a hard coating are deposited on an inner spherical substrate of the outer ring in sequence; a micro pit texture is machined on an inner spherical surface of the outer ring by using a laser heat effect; and a solid lubricant is filled in the micro pit texture. The light-weight self-lubricating wear-resistant joint bearing can satisfy the performance requirements of light weight, wear resistance and self lubrication of the joint bearing in such special working condition fields as aviation and spaceflight.

The invention relates to the technical field of pipeline engineering, and discloses a CIPP (cured in place pipe) for repairing a trenchless underground pipe network, and a preparation method and application of the CIPP. The CIPP for repairing the trenchless underground pipe network disclosed by the invention comprises a tubular fiber fabric, resin and a curing agent or a reactive diluent, whereinthe resin, the curing agent and the reactive diluent or the reactive diluent fill the fiber fabric; and the CIPP also comprises ultra-high-molecular-weight polyethylene, wherein the ultra-high-molecular-weight polyethylene is ultra-high-molecular-weight polyethylene particles or ultra-high-molecular-weight polyethylene fibers. The ultra-high-molecular-weight polyethylene has high impact strength,high wear resistance and low friction coefficient, so that the ultra-high-molecular-weight polyethylene is adopted as a single filler, then the CIPP can meet various repair performance requirements such as wear resistance, corrosion resistance, impact resistance, self-lubrication and the like, and meanwhile, the effects of simplifying formula, facilitating stirring and saving construction time areachieved. The ultra-high-molecular-weight polyethylene is safe and nontoxic, so that the CIPP provided by the invention can be used for repairing underground pipelines, and can also be used for repairing drinking water pipelines.

The invention provides a cyano-containing polyarylethersulfone / polyethersulfone coating composition and a preparation method thereof and belongs to the technical field of coating. The cyano-containingpolyarylethersulfone / polyethersulfone coating composition takes a mixture of polyethersulfone resin and cyano-containing polyarylethersulfone resin as film-forming resin; a preparation technology comprises the following steps: dissolving the polyethersulfone resin and the cyano-containing polyarylethersulfone resin into a compound solvent composed of N-methylpyrrolidone, dimethylacetylamide, toluene, butanone and the like at a stirring peed of 3200 to 3800r / min; then adding components including pigment and filler and the like in sequence and grinding in a sand grinder for 2 to 6h. The preparation and coating technologies of the coating, provided by the invention, are simple to operate, production equipment is easy to realize and an applicable range is relatively wide; a prepared coating layer has good impact resistance, corrosion resistance and the like; meanwhile, the cyano-containing polyarylethersulfone is added, so that the attachment force of the coating layer is further improvedwhen being compared with that of a pure polyethersulfone coating layer.

The invention discloses a floating drum aeration blender. Its floating drum is sleeved on the blender main body, which comprises a motor (1), a connecting shaft (2) and a composite impeller. The connecting shaft (2) includes an inner shaft (3) and a casing pipe (4) from inside to outside in order. The output end of the motor (1) passes through a shaft coupling (5) and the inner shaft (3) so as to be connected to vanes (6) of the composite impeller. The front end of the casing pipe (4) is adjacent to the composite impeller, and the back end of the casing pipe (4) is in connection with the motor (1) through a flange (7). A shaft sleeve (8) and a bearing (9) are disposed between the inner wall at the front end of the casing pipe (4) and the inner shaft (3) in order from inside to outside. A water inlet hole (10) is arranged on a lateral side at the casing pipe (4) front end. And a fiber filter screen (11) is disposed at the inlet of the water inlet hole (10). The blender provided in the invention not only has a long service life, but also has the advantages of simple structure and convenient installation.

The invention provides a Ti3AlC2-Fe alloy-based high-temperature-resistant self-lubricating composite material and a preparation method of the Ti3AlC2-Fe alloy-based high-temperature-resistant self-lubricating composite material, and belongs to the field of lubricating materials. The composite material is prepared by mixing and sintering raw materials and comprises the following raw materials of,by mass percentage, 25-50% of Ti3AlC and the balance of a Fe alloy. The Fe alloy comprises, by mass percentage, 1-15% of Cu powder, 0.1-5%% of Ni powder, 0.5-5% of Cr powder and the balance Fe powder.The Ti3AlC2-Fe alloy-based high-temperature-resistant self-lubricating composite material has the advantages of fatigue resistance, impact resistance, high temperature resistance, strong bearing capacity and the like, can achieve self-lubricating performance, reduces the friction coefficient, has better self-lubricating performance under high-temperature conditions, and is suitable for manufacturing a self-lubricating material under severe working conditions.

The purpose of the present invention is to provide an independent isolation and flushing system of double-end mechanical seals for centrifugal pumps, to overcome various defects and disadvantages of centrifugal pump mechanical seals during use, to improve the stability of mechanical seal operation, and to increase the resistance to harsh conditions. The adaptability to the working conditions prolongs the service life and meets the requirements of use. In order to achieve the above purpose, an independent isolation and flushing system for a double-end mechanical seal for a centrifugal pump is provided, which is characterized in that it includes a double-end mechanical seal, an isolation cavity assembly, a shaft sleeve and a sealing gland. In order to achieve the above purpose, it is also possible to provide an independent isolation and flushing system for double-end mechanical seals for centrifugal pumps, which is characterized in that it includes double-end mechanical seals, pumping structures, seal boxes, shaft sleeves, sealing glands and liquid storage tanks Assembly, liquid storage tank assembly is filled with spacer fluid for circulating lubrication and cooling. Above-mentioned two kinds of schemes can be implemented independently, reach the object of the invention independently, embody beneficial effect.

The invention provides a self-lubricating integrated clamp wheel for a sintering pallet, comprising a spacer ring and a clamp wheel clinging to the spacer ring. The clamp wheel is characterized by adopting the clamp wheel appearing as tube shape, respectively arranging solid lubrication cavities on the inner-bore wall as well as tube walls of two ends of the tube-shaped clamp wheel, embedding solid lubricant in the solid lubrication cavities and connecting the inner-bore of the tube-shaped clamp wheel with a shaft in a rotary manner. The solid lubrication cavities appear as spiral grooves, strip-shaped grooves and round holes. With the self-lubricating integrated clamp wheel for the sintering pallet, the precision of the clamp wheel is enhanced, workload of arrangement is reduced and production efficiency is raised. The structure of the invention is simple, the assembling process is convenient and the precision is high.

The invention provides a novel axial flow pump. The novel axial flow pump comprises an axial flow pump body and a seal assembly, wherein the axial flow pump body comprises a shell and a pump shaft; aguide pipe communicating with the interior of the shell is arranged on the top of the shell; an annular supporting part is arranged on the inner wall of the top end of the guide pipe; a rubber bearingmatched with the pump shaft is arranged in the guide pipe; the pump shaft comprises a shaft shoulder supported against the bottom end of the rubber bearing; the seal assembly comprises a first elastic adjusting part and a second elastic adjusting part; the first elastic adjusting part is arranged on the pump shaft in a sleeving manner and is located between the supporting part and the rubber bearing; the second elastic adjusting part is arranged on the rubber bearing in a sleeving manner and is located below the first elastic adjusting part; a buffer layer which is arranged on the rubber bearing in a sleeving and sealing manner is arranged between the first elastic adjusting part and the second elastic adjusting part; a containing cavity for placing filler is formed by the first elastic adjusting part, the buffer layer, the rubber bearing and the pump shaft in a surrounding manner; and wedge-shaped sealing rings are pressed between the first elastic adjusting part and the supporting part and between the second elastic adjusting part and the shaft shoulder. The novel axial flow pump has relatively good sealing property and cooling effect.

The invention discloses a lubrication-free step chain which comprises an inner chain link and an outer chain link, and further comprises a sleeve-use oiling-free bushing, a pair of seal rings, a pair of flat washers and a pair of annular sealing gaskets, wherein the sleeve-use oiling-free bushing is arranged on the periphery of a pin shaft in a sleeving manner; the pair of the seal rings is arranged on the periphery of the pin shaft in a sleeving manner, and is positioned between a pair of outer chain plates; the sleeve-use oiling-free bushing is positioned between the pair of the seal rings; the pair of the flat washers is arranged on the periphery of a sleeve in a sleeving manner; a pair of inner chain plates is positioned between the pair of the flat washers; the pair of the annular sealing gaskets is arranged on the periphery of the sleeve in a sleeving manner, and is positioned between the pair of the outer chain plates; and the pair of the flat washers is positioned between the pair of the annular sealing gaskets. According to the lubrication-free step chain, grease can be placed in the sleeve-use oiling-free bushing in advance, so that the self lubrication is achieved, the flat washers and the annular sealing gaskets can prevent external pollutants from entering the sleeve, and the pre-placed grease is prevented from being polluted.

The invention belongs to the technical field of aviation, and relates to a bi-directional high load-bearing capacity wear-resistant mechanism. The bi-directional high load-bearing capacity wear-resistant mechanism is characterized by adopting a two-sided self-lubricating composite gasket and a deflection rocker arm with a self-lubricating wear-resistant bush to realize a bi-directional high load-bearing capacity wear-resistant function of the mechanism. The bi-directional high load-bearing capacity wear-resistant mechanism has beneficial effects that a simple replaceable structure is arranged between two structures which can slide relative to each other under a high load, and a simple permanent wear-resistant structure is arranged between two structures which slide relative to each other under a secondary high load, so that not only can the self lubrication of the mechanism be realized, but also a replacing mechanism is convenient to maintain and replace, and the slide abrasion problem of an airplane body structure under the high load can be thoroughly solved.

The invention provides a tool clamp for a special-shaped storage vehicle oil pump shell, and belongs to the technical field of machining clamps. The tool clamp comprises a rack, and a turnover mechanism is arranged on the rack; the base plate is connected with the turnover mechanism, and a machining station is arranged on the base plate; the pressing mechanism is installed on the base plate, and the pressing mechanism comprises a pressing assembly and a clamping assembly; the supporting mechanism is installed on the base plate, the supporting mechanism comprises a plurality of supporting assemblies, and the supporting assemblies are matched with the surface of the workpiece in a contact mode. The workpiece can be pressed and positioned before being machined through the pressing mechanism, vibration of the workpiece during machining can be avoided through the supporting mechanism, so that the machining precision of the workpiece is improved, in addition, the overturning mechanism drives the base plate to rotate, overturning of the workpiece is achieved, machining of different parts of the workpiece is achieved, and the machining efficiency is improved. The processing efficiency is improved; and the labor intensity is reduced.