64 results about "Circular surface" patented technology

The application discloses a kind of head crescent boss processing methods of pin shaft structure bite cutting forceps, comprising the following steps: (1) the head of bite cutting bite cutting forceps is aged hardening;(2) the lower forceps tube of bite cutting forceps is clamped on five-axis engraving machine;(3) whether workpiece clamping on tool is in place is detected;(4) detection end mill, run program, carry out roughing to blank;(5) detection T-shaped milling cutter I, the wear condition of tool is detected in machine using tool detector, whether tool wear exceeds limit value is judged, if exceeding tool wear, machine tool automatically alarms, prompts operator to replace tool;(6) run program, outer circular surface is processed using T-shaped milling cutter I, (7) tool is replaced for T-shaped milling cutter II, T-shaped milling cutter II is detected again, and detection steps are as in step (5);(8) run program, inner circular surface is processed using T-shaped milling cutter II.The method can be processed crescent structure at a time, guarantee processing efficiency, precision and stability.

A lighter grinding wheel assembling and discharging mechanism comprises an axial horizontal rotating wheel, a coaxial annular groove is formed in the outer circle face of the rotating wheel, and a plurality of arc-shaped grooves distributed around the rotating wheel at equal intervals are formed in the bottom face of the annular groove. The feeding device further comprises a discharging module located on the upper edge of the rotating wheel, a circular-arc-shaped limiting section matched with the bottom face of the annular groove is formed at the bottom end of the discharging module, and a first material distributing opening, a second material distributing opening and a third material distributing opening which upwards penetrate through the discharging module are further formed in the bottom face of the circular-arc-shaped limiting section. According to the utility model, the blanking module is used for blanking and distributing the edge wheel at one end of the steel wheel of the lighter grinding wheel, and blanking and distributing the edge wheel at the other end of the steel wheel after single-side assembly is completed, so that the coaxiality after the edge wheel of the lighter grinding wheel and the steel wheel are assembled is obviously improved, and the reject ratio is lower.

The utility model discloses a SiC wafer degumming protection device, which comprises a first fixer, the first fixer comprises a first fixing plate, and the axial direction of a wafer group is along a first direction; the surface, facing the wafer group, of the first fixing plate is matched with the semi-circumferential surface of the wafer group; and in the second direction, the first fixers are divided into two groups which are oppositely arranged, and the first fixing plates in the two groups of first fixers can be far away from each other or close to each other in the second direction. When the two first fixing plates are far away from each other, a sufficient space is formed between the two first fixing plates to accommodate the wafer group. When the two first fixing plates are close to each other, the surfaces, facing the wafer group, of the two first fixing plates can be matched with the two semi-circumferential surfaces of the wafer group respectively, so that the two first fixing plates can support wafers in the wafer group in the second direction, and the wafers are prevented from rolling in the second direction; therefore, the wafer can be prevented from rolling and being damaged in the degumming and wafer washing process, and the wafer quality is further improved.

According to the thin-wall annular workpiece self-relief clamping device, a flange plate is used for being connected with a machine tool, one end of the flange plate is connected with a positioning body, a push-pull shaft is connected with a supporting disc, and the supporting disc is limited between the positioning body and the flange plate; one end of the positioning body is connected with a positioning backer, an internal expansion chuck is arranged between the positioning backer and the positioning body in a sliding fit mode, the internal expansion chuck is connected to the push-pull shaft, the positioning body is in contact with the internal expansion chuck through a conical surface, a workpiece is arranged on the outer circle face of the internal expansion chuck in a sleeving mode, and the end face of the workpiece abuts against one end of the positioning backer; the positioning device further comprises an elastic piece which is arranged between the flange plate and the supporting plate or between the supporting plate and the positioning body. Compared with the prior art, the elastic piece is additionally arranged between the flange plate and the supporting plate, the elastic piece plays a role in releasing force, the normal stress of the elastic piece on the push-pull shaft just counteracts the overlarge pulling force of the hydraulic oil cylinder on the push-pull shaft, and deformation of the thin-wall annular workpiece is avoided.

The invention discloses a titanium thin-wall special-shaped flat can shell forming process. The cross section structure of a titanium thin-wall special-shaped flat can shell comprises a lower large arc surface, two small arc surfaces and a horizontal surface, wherein the two small arc surfaces are connected with the lower large arc surface and are symmetrically and vertically connected on two sides, and the horizontal surface is horizontally welded and connected with the upper edges of the two symmetrical side small arc surfaces. The forming process comprises the following manufacturing procedures of firstly pressing two small arc surfaces on the side edge, then rolling a large arc surface at the bottom, splicing two upper horizontal half planes together to form the same plane at the upper part, then tack welding, then welding and forming, and finally carrying out the operation procedures of heating, correcting, heat treatment, annealing and the like. The method comprises the steps of pressing, rolling, tack welding, welding, heating, sizing, heat treatment and sizing. By adopting the forming process, the flatness of the welding seam of the titanium thin-wall special-shaped flat can shell is effectively improved, the welding stress and the welding deformation are eliminated, and the overall processing and manufacturing quality of the titanium flat can shell is greatly improved.

The invention discloses a short-process preparation method of an ultra-high-speed laser cladding coating on the surface of a shaft part and the obtained coating, and the method comprises the following steps: firstly, based on energy conservation and momentum balance, calculating and determining a stable process window of ultra-high-speed laser cladding; based on a geometrical optical model, the horizontal offset distance of the laser head relative to the central axis of the workpiece is calculated and controlled. Based on molten pool stress analysis under a rotating coordinate system, the relation between the rotating direction of a workpiece for restraining flowing of a molten pool and the offset direction of a laser head relative to the central axis of the workpiece is determined, under the determined conditions, ultra-high-speed laser cladding is conducted on the outer circle surface of the shaft part, and single-pass precision grinding is directly conducted after cladding. According to the method, the thin-layer coating with the smooth surface and the uniform thickness is obtained through physical stability control, the machining route of cladding-turning-grinding is simplified into cladding-single-pass precision grinding, and the machining allowance and the production cost are remarkably reduced.

The invention discloses a precise shot blasting method suitable for a complex undercarriage structural part, and belongs to the technical field of part surface modification, and the precise shot blasting method comprises the following steps: step a, dividing a shot blasting area of the part into an outer circular surface area, a complex outer surface area, an inner surface small hole area and a deep inner hole area; b, the part is vertically clamped, and shot blasting is conducted on the outer circle face area of the part through an outer surface spray gun; c, shot blasting is conducted on the complex outer surface area of the part through an outer surface spray gun; step d, performing shot blasting on a small hole area on the inner surface by adopting a small hole spray gun; and e, shot blasting is conducted on the deep inner hole area through a deep inner hole spray gun. Through reasonable shot blasting area division and shot blasting path planning, the shot blasting coverage rate uniformity and the shot blasting strength uniformity of the inner surface and the outer surface of the part are improved.

The utility model relates to the technical field of crushers, in particular to a structure capable of conveniently and quickly replacing roller skins for a crusher, which comprises a rotatable main shaft, two ends of the main shaft are arranged on two bearing seats, and a crushing roller is sleeved on the main shaft between the two bearing seats; the positioning sleeve sleeves the main shaft close to the first end of the main shaft and is fixedly connected with the main shaft; the first roller disc is slidably sleeved on the positioning sleeve, and the first conical surface of the excircle surface of the first roller disc is matched with the second conical surface of the first end of the inner wall of the crushing roller; the second roller disc sleeves the main shaft close to the second end of the main shaft and is fixedly connected with the main shaft, and a third conical surface of the excircle surface of the second roller disc is matched with a fourth conical surface of the second end of the inner wall of the crushing roller; the multiple lead screws are evenly arranged in the circumferential direction of the main shaft and arranged between the first roller disc and the second roller disc, and the two ends of each lead screw penetrate through the first roller disc and the second roller disc respectively and then are provided with nuts; the utility model has the advantages that the bearings on the bearing seats at the two ends of the main shaft do not need to be detached, and the replacement process is greatly simplified.

The application relates to the field of workpiece machining equipment, in particular to a numerical control machining center capable of rapidly switching drill bits, which comprises a lathe body, a fixed frame arranged in a slide plate box of the lathe body and synchronously moving, a tool changing ring rotationally connected to the fixed frame and having a rotation axis consistent with the moving direction of the fixed frame, a tool changing motor arranged in the fixed frame and driving the tool changing ring to rotate, a plurality of drill bits uniformly arranged on the outer circular surface of the tool changing ring and capable of machining workpieces, a plurality of sleeve shafts rotationally connected to the inner circular surface of the tool changing ring and one-to-one corresponding to all the drill bits, a power motor arranged in the fixed frame and capable of driving a corresponding sleeve shaft to rotate, a plurality of vertical bevel gears rotationally connected to the tool changing ring and one-to-one corresponding to all the sleeve shafts and driven to rotate by the sleeve shafts, and a plurality of flat bevel gears rotationally connected to the tool changing ring and one-to-one engaged with all the vertical bevel gears, each flat bevel gear can drive a drill bit to rotate, so that the lathe can also be modified to adapt to rapid switching of drill bits.

The application discloses a kind of multi-dimension flow channel special-shaped body manufacturing method, including steps S1: rough machining, rectangular parallelepiped forging is processed into the special-shaped piece of internal multi-dimension flow channel;S2: after rough machining, workpiece is treated, temperature is at 320±10 ℃, keeps warm 4 hours, deep hole processing is carried out to workpiece, and the multi-dimension flow channel special-shaped body ontology is obtained;S3: vibration stress relief treatment is carried out, and multi-dimension flow channel special-shaped body ontology is assembled, including the assembly of multi-dimension flow channel special-shaped body ontology and cover plate, finger;S4: vacuum stress relief heat treatment, temperature is at 400±10 ℃, heating or cooling rate is not more than 55 ℃ / h, and the maximum local temperature difference of part is not more than 55 ℃, then keeps warm 2 hours.The multi-dimension flow channel special-shaped body of the application is assembled and welded after being assembled and welded with the first wall full-size prototype left and right 10 pairs of fingers, and two large circular surfaces are formed, the height difference between adjacent fingers on the whole circular surface is not more than 0.5mm, to meet product requirements.

The application discloses an assembling method of a negative-clearance three-row roller variable-pitch bearing, which comprises the following steps: (1) determining a target heating expansion amount of a first outer ring; (2) wrapping a heating belt on an outer circular surface of the first outer ring, contacting a plurality of dial indicators with radial rolling ways of the first outer ring, and measuring and calculating the heating expansion amount Delta d of the first outer ring during heating; (3) adhering radial rollers and radial retainers on the radial rolling ways of an inner ring by using lubricating grease; (4) after the heating expansion amount reaches a standard, quickly assembling first axial rollers and first axial retainers on first axial rolling ways of the first outer ring; (5) hoisting the inner ring with the assembled radial rollers and radial retainers into the first outer ring; (6) assembling second axial rollers and second axial retainers into second axial rolling ways of a second outer ring; and (7) installing O-shaped sealing rings on the second outer ring by using the lubricating grease; then, the second outer ring and the first outer ring are butted and fixed, and sealing rings at the end of the bearing are installed. The application can realize the hot assembly of the bearing, and has the characteristics of safety, effectiveness, simplicity and practicability.

The application discloses a brake drum roundness detection method, system and detection device. First, basic detection parameters are collected and a three-dimensional polar coordinate system is constructed, then detection distance parameters of each detection point on the brake drum to be detected are obtained, and polar coordinate sets of each detection point are calculated according to the basic detection parameters and the detection distance parameters, then an actual outer circular surface model of the brake drum to be detected is generated according to the polar coordinate sets, finally, a standard outer circular surface model and the actual outer circular surface model are compared to determine whether the brake drum to be detected is qualified. The application can simultaneously perform multi-point synchronous detection on the brake drum to be detected in the height direction, is more efficient, simultaneously realizes 360-degree dead angle-free measurement on the brake drum to be detected, forms a plurality of sampling points arranged once in the axial direction, and thus the entire outer peripheral surface of the brake drum to be detected is covered, that is, the height of the detection device does not need to be adjusted in a detection period, and the detection efficiency is further improved.

The invention relates to the technical field of machining, and provides a segmented annular workpiece machining method and clamping device.The machining method comprises the steps that S1, a segmented annular workpiece is jacked in the radial direction through a jacking assembly of a first clamping device, so that finish machining of the upper end face of the segmented annular workpiece is completed; s2, the segmented annular workpiece is axially pressed from the outer side through a first pressing assembly of a second clamping device, so that finish machining of the outer circle face of the segmented annular workpiece is completed; s3, before pressing is executed, a first copper gasket is placed between a pressing plate of a second pressing assembly in a third clamping device and the outer circle face of the workpiece, and all segmented joints of the workpiece are stuffed with second copper gaskets; and then the segmented circular-ring-shaped workpiece is axially pressed from the outer side through a second pressing assembly of the third clamping device, so that finish machining of the inner circular face of the segmented circular-ring-shaped workpiece is completed. Through sequential use and targeted process design of the three sets of clamping devices, high-precision, high-efficiency and high-integrity segmented circular ring machining is achieved.

A screw rod shaft (12) is connected to a bearing seat (11) and a sleeve cylinder body (2) in a penetrating mode from back to front, a lever (4) is hinged to the middle of a body shell (1) on the lower side of the sleeve cylinder body (2), and a first supporting block (5) and a second supporting block (6) are installed at the front end of the sleeve cylinder body (2) and the front end of the lever (4) respectively. The double-supporting-block supporting structure with the adjustable included angle is arranged, the supporting force can be adjusted, the grinding machining precision of the equidistant arc face slender shaft workpiece can be effectively improved, the machining rigidity, stability and efficiency can be improved, the radial cutting force borne by the slender shaft in the machining process can be offset, and therefore stress deformation of the slender shaft is eliminated; it is ensured that the dial indicator jumps within 0.005 mm before and after clamping. The device can adapt to machining of slender shafts with the high precision requirement, can be used for machining technologies such as turning, turn milling and grinding of the slender shafts with the equidistant arc surfaces, and has good universality and popularization value.

The application provides a milling machine processing coordinate system establishment method for special-shaped parts with branch nozzles, and belongs to the field of forging technology. In view of the problem that the primary processing coordinate system cannot be established when the branch nozzle of the special-shaped part with the branch nozzle is processed, twice processing is required, and the finished product precision and quality are low, the application provides a milling machine processing coordinate system establishment method for special-shaped parts with branch nozzles, which comprises the following steps: S10, finish machining of the bottom plane and the outer circular surface of the blank, the square boss and the branch nozzle blank end face; S20, adopt a universal milling head to install a centering rod, cooperate with the spherical center of the blank and the square boss end face to determine an initial coordinate system; S30, rotate the initial coordinate system to make the Z-axis coincide with the center line of the branch nozzle blank, and form a second coordinate system; and S40, reset the Z-axis 0 position of the second coordinate system to obtain a final processing coordinate system. The application combines the universal milling head and the centering rod to accurately establish the processing coordinate system for the branch nozzle, ensures one-time processing of the branch nozzle, and improves the finished product precision and quality.

The utility model discloses a centrifugal wind wheel, a fan assembly and an air conditioner, and relates to the technical field of centrifugal fans, the centrifugal wind wheel comprises a chassis and a plurality of blades; the multiple blades are evenly distributed on the base plate around the axis of the base plate, each blade is provided with an inwards-concave face, and each inwards-concave face comprises a first arc face and a second arc face which are sequentially connected from inside to outside; wherein the distance between the inner end of the first arc surface and the axis of the base plate is L1, the distance between the outer end of the second arc surface and the axis of the base plate is L2, the distance between the intersection point of the first arc surface and the second arc surface and the axis of the base plate is L3, L1 / L2 is larger than or equal to 0.55 and smaller than or equal to 0.65, and (L3-L1) / (L2-L1) is larger than or equal to 0.6 and smaller than or equal to 0.75. The technical scheme provided by the utility model is used for reducing the flow separation condition of air flow and reducing noise.

This invention relates to the field of integrated bearing grinding technology, specifically to a multi-face integrated grinding process for the outer ring of a cross-roller bearing and its dedicated grinding device. The technical solution involves: clamping the outer ring of the cross-roller bearing once via the workpiece spindle base, and adjusting the axis of the bearing outer ring to form a 45° grinding inclination angle with the axis of the grinding end of the dedicated grinding device in the horizontal plane. The forming grinding wheel is controlled to cut into the outer ring of the cross-roller bearing radially, so that the first, second, and third grinding surfaces simultaneously contact and grind. The beneficial effect of this invention is that by using a dressed forming grinding wheel for 45° compound entry grinding, the outer circular surface, the stepped outer diameter surface, and the stepped end face of the grinding wheel simultaneously contact the workpiece, completing the machining of the outer circle, stepped outer diameter, stepped end face, and connecting fillet in one operation, completely eliminating the positioning errors caused by multiple clamping and equipment turnover in traditional processes.

This invention discloses an automatic clamping gear hobbing machine for wheel hub tubes, belonging to the field of automotive parts processing technology. By driving a synchronous adjustment component, the adjusting ring can rotate, and five radial locking blocks slide synchronously along the annular limiting groove. The radial locking blocks retract radially towards the axis along the limiting groove, and the five evenly distributed radial locking blocks move synchronously towards the center. The arc surface of the inner wall tightly fits against the outer circular surface of the workpiece top, locking it axially. This connects the wheel hub tube workpiece with the workpiece locking sleeve and the mounting plate as one unit. The mounting plate with the wheel hub tube workpiece is then placed on a support plate, and the L-shaped positioning key aligns with the keyway. Therefore, when processing wheel hub tube workpieces without keyways, there is no need to add an extra milling process for the keyway and subsequent removal process, significantly improving the workpiece production cycle and increasing production efficiency. It can also adapt to the needs of batch production of workpieces of different specifications, which is beneficial for efficient and stable processing of wheel hub tubes.

This utility model discloses a butterfly valve with a locking function, including a valve body, an extension tube, a valve stem, and a butterfly plate; it also includes a locking mechanism, which comprises an operating ring, a push rod, and a spring. The operating ring is sleeved on the outer circumference of the extension tube, and a guide hole is provided through the side of the extension tube. The push rod is slidably disposed in the guide hole. The spring applies a spring force to the push rod in a direction away from the valve stem. The inner circular surface of the operating ring is provided with a first annular groove, a second annular groove, and a conical groove. The inner diameter of the first annular groove is smaller than the inner diameter of the second annular groove. When the operating ring moves axially, the push rod has a locked position where its outer end abuts against the inner circular surface of the first annular groove and its inner end abuts against the outer circular surface of the valve stem, and an unlocked position where its outer end abuts against the inner circular surface of the second annular groove and its inner end disengages from the outer circular surface of the valve stem. This utility model can lock the valve when it is closed, preventing accidental opening of the butterfly valve due to employee misoperation or accidental contact, which could lead to safety accidents such as media leakage or explosion.

This invention provides a pump body assembly, a rotary compressor, and an air conditioner, including a crankshaft and an upper flange and a lower flange for supporting the crankshaft. The crankshaft includes a long shaft and a short shaft. The outer circular surface of the long shaft is provided with a first outer spherical surface, which includes a first upper spherical surface and a first lower spherical surface. The first outer spherical surface has a first great circle perpendicular to the crankshaft axis, and the first upper spherical surface and the first lower spherical surface are respectively located on the upper and lower sides of the first great circle. The inner hole of the upper flange includes a first inner spherical surface that matches the first outer spherical surface. The outer circular surface of the short shaft is provided with a second outer spherical surface, which includes a second upper spherical surface and a second lower spherical surface. The second outer spherical surface has a second great circle perpendicular to the crankshaft axis, and the second upper spherical surface and the second lower spherical surface are respectively located on the upper and lower sides of the second great circle. The inner hole of the lower flange includes a second inner spherical surface that matches the second outer spherical surface, thereby solving the technical problem in the prior art where stress concentration between the crankshaft and the upper and lower flanges is caused by the crankshaft deflection.

The invention provides tempered glass edge grinding equipment, and relates to the technical field of edge grinding equipment, the tempered glass edge grinding equipment comprises a driving rotating shaft, an adjusting mechanism, a buffering mechanism and a grinding mechanism, and the buffering mechanism composed of a rubber pad and a buffering spring is arranged between a supporting plate and the grinding mechanism through the equipment; vibration absorption is achieved through elastic deformation of a rubber pad and elastic reset of a buffer spring, the limiting effect of a limiting rod and a limiting groove is matched, hard collision between the grinding disc and the edge of the glass is avoided, grinding angle deviation caused by excessive shrinkage or inclination of a buffer structure is prevented, and the service life of the grinding disc is prolonged. The grinding mechanism forms an arc surface through meshing of a stud and a threaded groove, circumferential clamping of a clamping block and a clamping groove, magnetic attraction limiting of a magnetic limiting block and a limiting hole and clamping of a rough grinding surface, a medium rough grinding surface and a fine grinding surface, so that multi-stage progressive grinding is realized, and the problem of glass breakage caused by single grinding is fundamentally avoided; and the tempered glass edging yield and the surface machining precision are remarkably improved.

The application discloses a kind of handheld laser welding repair defect process protection methods, comprising the following steps: S1: measurement;Part is placed on platform, and the structure state around defect position is clear, defect is in plane, circular surface (inner / outer), corner, corner and so on Position, and the size of defect position is measured, and according to the size of different defect position, it is divided into point defect and surface defect;S2: prepare adaptive repair protection sample plate;According to the size obtained by measuring different defects, prepare repair protection sample plate;S3: assembly;Repair protection sample plate is fixed in defect to be repaired position using fixing piece etc.;S4: defect repair;The way of welding while feeding wire is used to repair defect, to ensure that repair height is higher than surrounding matrix;S5: machining;Remove excess filler metal, and the filling position meets the size requirement of drawing;S6: appearance inspection;Further improve repair quality and repair efficiency.

The biscuit demolding device of the rotating target material comprises a base, two parallel rails are arranged on the upper surface of the base, and a support body perpendicular to the base is arranged on the outer side of each rail; the bearing platform comprises a lifting table on the outer layer and a sliding table on the inner layer, the two opposite sides of the sliding table are supported on the supporting face on the inner side of the lifting table in a sliding mode, and the table top of the sliding table is flush with the table top of the lifting table; rollers rolling along the rails are arranged on the lower surface of the sliding table; one side of the lifting table is opened for the sliding table to slide out of the lifting table along the supporting face, and the sliding direction of the sliding table is the same as the rail direction. The lifting mechanism is arranged on the base and connected with the lifting table; the fixing assembly comprises a transverse support and a fixing ring, the fixing ring comprises two semi-circular rings, the outer circular face of each semi-circular ring is fixedly connected with one end of the transverse support, the other end of the transverse support is fixedly connected with the support body on the same side, and the ends of the two semi-circular rings are connected through an adjusting bolt. According to the utility model, stable and safe biscuit demoulding can be ensured, and the damage probability of the biscuit is reduced.

The invention discloses a 3D model display method and device, equipment and a storage medium, and belongs to the technical field of 3D models. The method comprises the following steps: loading a 3D model to be displayed by utilizing a model loading tool; the position of the camera is determined at least through the three circular rings, and a 3D model picture shot by the camera is rendered on a man-machine interaction interface of the model loading tool; and in response to the adjustment operation of the user, re-determining the position of the camera, and rendering a 3D model picture shot by the camera at the current position on the human-computer interaction interface of the model loading tool. According to the embodiment of the invention, the three circular rings are set to express the circular surface, so that the camera can display the 3D model from any position of the circular surface, the highest and lowest positions of the camera can be limited through the uppermost circular ring and the lowermost circular ring while the moving range of the camera is expanded, and the limiting requirements wanted by a designer are met.

The application belongs to the technical field of clamps, and particularly relates to an auxiliary clamp for finish machining of the outer circular surface of a ring-shaped part, which comprises a base body and a clamp body fixed at the front end of the base body, the clamp body comprises a large-diameter section and a small-diameter section, a step is formed at the joint of the large-diameter section and the small-diameter section, and a positioning sleeve is sleeved on the small-diameter section; a strutting part is connected to the front end of the small-diameter section, an expansion sleeve is sleeved on the strutting part, the surfaces in contact with each other between the expansion sleeve and the strutting part are all conical surfaces, the expansion sleeve is matched with a mandrel; an adjusting groove is arranged on the outer wall of the small-diameter section, the adjusting groove has a hemispherical structure or a conical structure which gradually narrows from the opening to the bottom, the positioning sleeve is provided with a first adjusting hole, the center line of the adjusting groove is closer to the step than the center line of the first adjusting hole, and the first adjusting hole is threadedly matched with a first adjusting bolt. The application has the advantages that the flatness of the tooling is adjusted to ensure the machining precision of the outer circular surface of the ring-shaped part.

The present application relates to conveying equipment technical field, specifically to a kind of desk and chair production material conveying system, including rack, multiple conveying rollers, driving mechanism, adjusting mechanism, two lateral limiting mechanisms, end baffle and clamping conveying mechanism;The outer circumferential surface of each conveying roller is provided with a ring groove along the circumference, and the cross section of the ring groove is V-shaped;Self-centering cooperation is formed by the V-shaped cross section of the ring groove and the circular surface of the cross beam, so that the cross beam automatically slides into the bottom of the ring groove under the action of gravity to complete the posture regulation, then the two sides of the cross beam are contacted and limited by the two lateral limiting mechanisms with adjustable spacing, to prevent deviation during conveying, while the driving mechanism drives multiple conveying rollers to rotate synchronously, and the cross beam is stably conveyed to the end of the rack, finally intercepted by the end baffle, to realize the cross beam to be accurately parked at the predetermined position with uniform posture, so that the posture of the cross beam can be regulated and accurately conveyed.

The invention discloses a sliding bearing extreme condition simulation test device, and relates to the field of sliding bearing performance testing. Comprising a test shaft sleeve assembly, a magnetic field excitation assembly, a thermal test bearing bush assembly, a test cavity assembly and a static force loading assembly. The outer circular surface and the inner circular surface of the magnetic field excitation assembly are respectively matched with the test cavity assembly and the thermal test bearing bush assembly to form a combined body, the static force loading assembly applies load and displacement to the combined body to change a gap between a test bearing bush and a test shaft sleeve so as to achieve the purpose of applying an extreme load to a test bearing, and meanwhile, the static force loading assembly is used for loading the test bearing bush and the test shaft sleeve. The test shaft sleeve assembly can effectively inhibit bending deformation of the cantilever rotating shaft under heavy load. Through cooperation with an external device, active simulation of coupling working conditions such as rotating speed, load, electromagnetic field, local high temperature and the like can be carried out, and a special simulation test of the sliding bearing under various abnormal extreme working conditions is realized.

The utility model discloses a bending machine die suitable for multi-radian circular face machining, and belongs to the technical field of bending machines. A bending machine die suitable for multi-radian round face machining comprises an upper support and a lower support, a multi-radian round face upper die is installed in the upper support, a multi-radian round face lower die is connected into the lower support in a sliding mode, and servo motors and bevel gears are installed at the upper end of the upper support and the lower end of the multi-radian round face lower die. The bending machine die solves the problem that an existing bending machine die is inaccurate in radian positioning due to the fact that a boss and a groove are used for machining, the four multi-radian circular face upper dies and the corresponding multi-radian circular face lower dies are adopted, and a bevel gear is driven by a servo motor to adjust a driving gear. The position of the bending head, corresponding to the forming groove, of the upper multi-radian circular face die is adjusted, the structure is simple, operation is convenient, and high-precision bending work is achieved through the precise lower multi-radian circular face die and the corresponding upper multi-radian circular face die.

The utility model discloses an adjustable clamping tool for rotor cooling fan blade processing, which comprises a base, a sliding block, an expansion ring and a bolt, the base is an arc strip structure matched with a cooling fan blade handle, the top of the base is in sliding connection with the bottom of the sliding block, the top of the sliding block is provided with a frustum matched with an assembly hole of the cooling fan blade handle, and the expansion ring is arranged in the frustum. The expansion ring is of a cylindrical structure with the inner circle face being a conical face, the outer circle face of the expansion ring is in clearance fit with the assembly hole, at least two lower kerfs are formed in the side wall of the bottom of the expansion ring in the circumferential direction, the conical face of the expansion ring is in interference fit with the frustum, a threaded hole is formed in the frustum, and the bolt is matched with the threaded hole in the frustum. The inner taper hole of the expansion ring and the frustum on the sliding block are attached and extruded, the outer circle of the expansion ring exerts pressure on the inner wall of the cooling fan blade combining hole after the expansion ring is expanded, namely circumferential extrusion force from inside to outside is formed for fixing, and therefore clamping of the cooling fan blade is achieved.

The application discloses a welded volute, which comprises a first side plate, a second side plate, an inner circular surface, an outer circular surface and a guide vane; one end of the outer circular surface is connected with the first side plate, and the other end is connected with the second side plate; the first side plate and the second side plate are both provided with a circular opening; the inner circular surface is in the shape of a circular truncated cone, and one end is connected with the circular opening of the second side plate; a plurality of guide vanes are uniformly arranged on the periphery of the inner circular surface in a circumferential direction; the guide vanes are in the shape of a circular arc, one end of the outer wall of the guide vanes is fixedly connected with the second side plate, and the other end of the outer wall is fixedly connected with the inner circular surface; the outer circular surface, the inner circular surface, the first side plate and the second side plate form an annular inner cavity and an air inlet, and the air inlet is communicated with the annular inner cavity. The volute can be quickly and efficiently processed by using simple plate materials and tubular materials, and in the processing process, a plurality of steel plates are not needed to be welded to form an arc surface, the welds in the flow channel are few, the inner surface of the flow channel is smoother, the processing efficiency is high, and the cost is low.