103 results about "Circular surface" patented technology

The invention relates to an eddy current test block for an inertia friction welding assembly and a preparation method of the eddy current test block, the eddy current test block comprises an annular test block, and a first notch groove group, a second notch groove group and a third notch groove group on the annular test block, the first notch groove group comprises a first vertical notch groove and a first parallel notch groove; the second notch groove group comprises a plurality of second parallel notch grooves which are respectively formed in the inner circular surface and the outer circular surface and are parallel to the weld joint surface; the third notch groove group comprises a plurality of notch groove pair groups, each notch groove pair group comprises a plurality of third vertical notch groove pairs and third parallel notch groove pairs, the circumferential distances between the third vertical notch groove pairs arranged on the inner circular surface and the outer circular surface are different, and / or the circumferential distances between the third parallel notch groove pairs arranged on the inner circular surface and the outer circular surface are different. According to the method, the defect equivalent of the inertia friction welding assembly with curvature can be accurately and comprehensively evaluated, and misjudgment and missed judgment of defects are avoided.

The invention relates to the technical field of rock mechanics true triaxial tests, in particular to a rock cylinder sample true triaxial test analysis method which comprises the following steps: applying a point load to the cylindrical surface of a cylinder sample, performing integration by using a linear superposition principle, and calculating an analytical solution of an internal stress field in the circular surface of the rock cylinder sample; applying a symmetry plane load to the cylindrical surface of the cylinder sample, and calculating an internal stress field of the circular surface of the cylinder sample under the symmetry plane load by using an analytical solution; setting a constraint condition of a stress state similar region, calculating a relation function between symmetrical surface loads in a corresponding loading mode, and determining the relation function as a linear gradient loading mode; and performing finite element analysis on the cylindrical sample of the rock, and verifying the feasibility of the linear gradient loading mode determined by the analytical solution. According to the invention, true triaxial test analysis of the cylinder sample is realized, the internal stress state of a larger area of the sample is ensured to be similar, and the problems of boundary effect, friction effect, fluid channeling and the like of a cubic sample are avoided.

The invention relates to the field of transmission system detection, and particularly discloses a method for measuring the abrasion loss of a bearing bush of a water-lubricated bearing engineering prototype, which comprises a measuring tool, the measuring tool comprises a shell of the water-lubricated bearing engineering prototype and the bearing bush positioned in the shell, and a through measuring hole is formed in the highest point of the top of the shell in the vertical direction of the bearing bush. The lower section of the positioning block is inserted into the upper section of the measuring hole, the upper section is a flange section positioned outside the measuring hole, and a through inner hole is also formed in the positioning block. The change of the gap delta between the outer circular surface of the top of the tail shaft and the upper surface of the inner circular surface of the bearing bush is obtained by using the distance rod before and after the test by using the tool, and the change is reflected on the change of the distance from the upper end of the distance rod to the top surface of the flange section of the positioning block, namely the difference value between X1 and X2; the difference value is actually the abrasion loss X of the bearing bush of the water-lubricated shaft. The method is easy to operate, high in precision and low in equipment investment and test cost.

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 invention belongs to the field of precision machining technology and relates to a precise automatic grinding device for the outer cylindrical surface of a part and its use method. In the invention, a part rotation driving mechanism arranged on a marble table drives a part to be ground to rotate; a clamping mechanism clamps a grinding bushing; a vertical reciprocating motion driving mechanism and a grinding bushing rotation driving mechanism connected to the clamping mechanism drive the grinding bushing to perform vertical reciprocating motion and rotational motion respectively; and a grinding attitude of the device is adjusted through a balance mechanism arranged on the clamping mechanism, and the part to be ground is ground with the grinding bushing. The invention can correct the taper error of the outer circular surface of a workpiece, has good versatility, high flexibility, convenient operation, extremely high grinding precision and low maintenance cost, is applicable to the automatic grinding processing of ultra-precise parts such as base discs and high-precision bearings, and can realize the on-line correction of errors of precision parts.

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 invention discloses a balance lifting beam for lifting building boards, and relates to the technical field of lifting slings, the balance lifting beam comprises a beam frame, a first lifting frame and a second lifting frame, the top of the first lifting frame and the top of the second lifting frame are provided with a first adjusting block and a second adjusting block respectively; adjusting holes are formed in the center of the first adjusting block and the center of the second adjusting block, internal threads are arranged on the inner circle face of the adjusting hole of the second adjusting block, a clamping groove penetrating through the top is formed in the center of the first adjusting block, and mounting grooves coaxial with the adjusting holes are formed in the two sides of the inner wall of the clamping groove. And an internal thread ring is arranged in the mounting groove. According to the lifting appliance, the first clamping block, the second clamping block and the hydraulic cylinder are arranged on the first lifting frame, in the process of adjusting the balance of the lifting appliance, the lifting points on one side can be independently adjusted, the lifting points on the two sides can also be adjusted at the same time, the two lifting points can be adjusted in the opposite or same direction at the same time, and use is more convenient.

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.

The utility model relates to a multifunctional belt sander, which belongs to the technical field of belt sanders, and comprises a fixed seat and a rotating main body which are rotatably connected, the lower end of one side of the rotating main body is rotatably connected with the fixed seat, an abrasive belt is arranged in the other side of the rotating main body, and a deviation adjusting mechanism for adjusting the deviation of the abrasive belt is arranged at the upper end of the rotating main body. The grinding and polishing device is compact in structure, convenient to operate, small in size, suitable for grinding and polishing of planes, circular surfaces, conical surfaces or irregular surfaces, flexible to operate, high in grinding efficiency, high in grinding precision, high in grinding efficiency and high in grinding precision. Grinding with angle requirements is achieved by adjusting the angle between the rotating body and the plane, the deviation position of the abrasive belt is adjusted through the deviation adjusting mechanism, and the tensioning degree of the abrasive belt is adjusted through the tensioning mechanism. One belt sander achieves multiple functions, machining efficiency is effectively improved, maintenance is easy, and meanwhile production cost is reduced.

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.

The invention relates to the technical field of roll collar machining, in particular to a roll collar high-precision slotting machining method and machining equipment. The high-precision grooving machining method for the roll collar comprises the following steps that S1, the roll collar is arranged on a central spindle in a sleeving mode, and the inner circle face of the roll collar abuts against the outer circle face of the central spindle; s2, a probe of a contourgraph is put on the outer circle face of the roller ring, namely the initial point of the probe; s3, a probe of the contourgraph is driven by a first moving module capable of moving in the direction perpendicular to the axis of the roll collar to move in the horizontal direction close to the outer circle face of the roll collar, and the highest point position, namely the highest point of the outer circle face of the roll collar, of the probe in the moving process is recorded; and S4, feeding, machining and slotting for the first time, and retreating after machining is completed. The device has the advantage that the groove edge distance can be accurately controlled so as to ensure the production precision of the roll collar.

The utility model belongs to the technical field of metallurgical pipe and bar straightening machine equipment, and relates to a wedge-shaped locking mechanism for a roller seat of a metal pipe and bar inclined roller straightening machine, and a straightening roller seat of the metal pipe and bar inclined roller straightening machine is provided with a platform for supporting a straightening roller; a protruding cylinder integrally formed with the platform is arranged on the lower portion of the platform, and the protrusion is located in the straightening machine lower rack. The middle section of the outer circular surface of the convex cylinder is provided with a conical surface which is gradually expanded from top to bottom; locking oil cylinders are arranged on the two corresponding sides of the straightening machine lower rack respectively. A conical surface friction copper pad matched with the conical surface on the roller seat of the straightening roller is arranged at the head part of a piston of the locking oil cylinder; and the two locking oil cylinders jointly apply pressure to the conical surface of the roller seat of the straightening roller. The straightening roller seat is firmly locked on the straightening machine lower frame machine, the problem that the straightening roller seat shakes after a straightening machine is used for a long time is solved, and the straightening precision of the straightening machine is improved. And the device has the characteristics of convenience in processing and low manufacturing cost.

The present invention discloses a method for processing an oblique tube of a casing assembly, comprising the following steps: tool design: according to the structural characteristics of the back of a pipe joint, a dovetail milling cutter for forming a conical surface and an inner arc circular surface in one step, and a trapezoidal milling cutter for forming an outer arc circular surface are designed. Clamping and positioning: the casing assembly blank is clamped and positioned on a special fixture. Tool setting: the tool length and tool radius of each processing tool are aligned on a tool setting instrument, and input into a CNC processing equipment. Position adjustment and verification: the inner hole of the end face of the pipe joint is rough-machined, and the zero point position is adjusted to the center of the pipe joint after measurement and verified by a table. Formal processing: according to a pre-set CNC processing program, conventional processing tools, dovetail milling cutters and trapezoidal milling cutters are used to process three oblique tube blanks in turn. The processing method of the present invention is not prone to tool letting-off phenomenon, has high processing accuracy, and the joint mark does not exceed 0.03mm, thereby improving the processing and forming quality of the pipe joint, reducing the scrap rate, and reducing production costs.

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 relates to a wheel assembly (550',550") for a container handling vehicle (501), the wheel assembly (550',550") comprising: - a wheel (510',510") and a gear wheel (511',511"), - the wheel (510',510") being rotatable around a wheel axis (WA) and comprising a toothed circular surface arranged radially inwards of a wheel rim of the wheel (510',510"), - the gear wheel (511',511") being rotatable around a gear wheel axis (GA) and engaged to the toothed circular surface (512) of the wheel (510',510") via a toothed outer surface (519',519"); wherein the wheel axis (WA) and the gear wheel axis (GA) are arranged parallel and offset relative to each other.