135 results about "Circular surface" patented technology

The utility model discloses a gear shaft excircle surface keyway fixture, which belongs to the technical field of gear shaft keyway fixtures, and comprises a support and a support component, the support comprises a base, a fixed plate and a movable plate, the fixed plate and the movable plate are oppositely arranged on the base, the movable plate can slide relative to the fixed plate, and the fixed plate and the movable plate are provided with a three-jaw chuck for clamping a gear shaft. The supporting assembly comprises two supporting strips symmetrically arranged on the two sides of the lower portion of the gear shaft, the opposite surfaces of the two supporting strips are arranged to be supporting inclined faces, the supporting inclined faces abut against the peripheral face of the gear shaft, and the two supporting strips are arranged on the base in a sliding mode and can synchronously move in the direction close to or away from each other. According to the clamp for forming the key groove in the outer circle face of the gear shaft, the two supporting strips which can be close to or far away from each other can effectively support the gear shaft, the supporting inclined faces on the supporting strips can adapt to gear shafts of different thicknesses, and the clamp is wide in universality and easy to operate.

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 discloses a robot safety collision interference detection method, device and equipment and a storage medium, and relates to the field of robots. M groups of candidate cylinder collision pairs are determined and screened from a mechanical arm and a tool end of the robot according to a kinematics equation; selecting a group of candidate cylinder collision pairs, calculating a first minimum distance from two circular surfaces formed by the to-be-measured cylinder collision boxes to the reference cylinder collision box, and measuring a second minimum distance from the side surfaces of the to-be-measured cylinder collision boxes to the reference cylinder collision box; determining the interference state of the candidate cylinder collision pair according to the round surface radius of the reference cylinder collision box, the first minimum distance and the second minimum distance; polling M groups of candidate cylinder collision pairs to complete mechanical arm interference detection. According to the scheme, the interference calculation of the mechanical arm is carried out by adopting the cylindrical collision box, the collision pair is selected in advance, the interference calculation method of the cylindrical collision box is optimized, the accuracy of interference detection is ensured, and the requirement of calculation real-time performance is met.

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 discloses a main shaft system of a wind driven generator, which relates to the technical field of wind power generation, and comprises a fixed shaft, a rotating shaft and two bearings, the rotating shaft sleeves the outer side of a shaft main body part of the fixed shaft, the rotating shaft is sleeved with a disc I and a disc II, and a reinforcing rib I is arranged between the disc I and the disc II; an inner concave structure is arranged at the transition position of the shaft main body part and the disc flange part of the fixed shaft, a transition ring is arranged in the inner concave structure, the transition ring axially extends to the bearing outside the inner concave structure, the transition ring is in interference fit with the bearing, the outer circular surface of the transition ring is in interference fit with the rotating shaft, and the inner circular surface of the transition ring is in clearance fit with the fixed shaft. The rotating shaft sleeves the outer side of the shaft main body part of the fixed shaft, so that the bearing capacity is higher; the rotating shaft adopts a double-disc shared reinforcing rib structure, so that the shaft system structure is relatively high in integral rigidity, simple in structure, light in weight and good in economical efficiency; and the transition ring is arranged at the concave structure, so that the stress concentration coefficient of the fixed shaft is greatly reduced on the basis of meeting the structural use requirement, and the use requirement of a large MW-level unit is met.

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 invention discloses a multi-energy-field auxiliary multi-phase jet flow polishing method and device for a miniature bearing, and the method comprises the steps that a plurality of bearing inner rings are clamped into a workpiece clamp, the center lines of all the bearing inner rings coincide after clamping, and the inner circle faces of the adjacent bearing inner rings are sequentially connected to form an inner circle face set with the two ends open; the spatial position of the inner circular surface group is determined, the position of the jet device is adjusted based on the spatial position and the divergence angle range of jet flow of the jet device, the center line of a jet flow nozzle of the jet device coincides with the center line of the inner circular surface group, and sprayed jet flow can cover the whole inner circular surface group; through the synergistic effect of multiple energy fields, stress-scratch-free efficient low-damage polishing machining can be conducted on multiple complex inner ring structures at the same time, tool marks and burrs generated after machining are effectively removed, the polishing quality and efficiency of high-end spaceflight parts are greatly improved, and the polishing quality and efficiency of the high-end spaceflight parts are improved. And the development of advanced manufacturing technologies of major equipment such as aviation and spaceflight in China can be effectively supported.

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 relates to a holding-up hammer grinding method. A holding-up hammer grinding machining method comprises the following steps that S1, a sectional view of a holding-up hammer blank is drawn, and a sectional view of a holding-up hammer product is drawn; s2, placing the holding-up hammer product section drawing in the holding-up hammer blank section drawing, so that the distance between the top surface of the holding-up hammer product section drawing and the top surface of the holding-up hammer blank section drawing is greater than or equal to a first set distance, and the outer edge line of the holding-up hammer product section drawing does not coincide with the outer edge line of the holding-up hammer blank section; s3, measuring the distance between the corresponding line of each surface of the holding-up hammer product sectional view and the corresponding line of each surface of the holding-up hammer blank sectional view; s4, extending a line corresponding to the outer circular surface of the section drawing of the anvil product, drawing an auxiliary line perpendicular to a line corresponding to the bottom surface of the section drawing of the anvil product, and measuring the shortest distance between an intersection point and the auxiliary line; and S5, the anvil blank is machined according to the grinding machining amount obtained in the step S3 and the step S4. The method has the advantages that the production cost can be reduced, and the machining allowance is convenient to calculate.

The edge covering mechanism comprises a base, a rolling drum, a clamping device, a lower rolling device and a side rolling device, and a supporting plate is arranged on the rear side of the base; the rolling drum is rotationally connected to the supporting plate; the clamping device is arranged on the front side of the rolling drum; the lower rolling device is arranged below the rolling drum and comprises a first rolling piece and a second rolling piece; a first roller is arranged on the first rolling piece, and a second roller is arranged on the second rolling piece; the side rolling device comprises a third rolling piece and a fourth rolling piece; a third rolling wheel is arranged on the third rolling piece, and a fourth rolling wheel is arranged on the fourth rolling piece; when the tire blank is rolled, the first roller and the second roller are respectively propped against the tire blank and move back to back; the third roller abuts against the tire blank and winds from the circumferential surface of the rolling drum to the front end surface; the fourth roller abuts against the tire blank and winds from the circumferential face of the rolling drum to the rear end face. Through the arrangement, the compaction effect of the edge covering mechanism on the tire blank is better, and the machining precision is higher.

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 utility model relates to an internal eccentric swing arm driving mechanism suitable for large feeding quantity. The internal eccentric swing arm driving mechanism comprises a rotating shaft, an internal eccentric wheel, a bearing and a swing arm, the inner eccentric wheel is of a wheel body structure with the outer surface being a round face and provided with an inner input hole, the inner input hole is eccentrically formed, and the output end of the rotating shaft is matched with the inner input hole in an inserted mode and forms limiting fit in the circumferential direction. A bearing installation hole is formed in the power input end of the swing arm, the bearing is installed in the bearing installation hole, and the inner ring face of the bearing is in interference fit with the outer surface of the inner eccentric cam. The power input end of the swing arm is directly and rotationally connected to the outer circle face of the inner eccentric wheel through the bearing, the swing arm is directly driven to move through movement of the outer circle face of the inner eccentric wheel, the problem that dead points appear in the movement process of an existing outer eccentric wheel is solved, good movement stability is achieved, and the transmission efficiency is high. The large feeding amount requirement is well met, in addition, the compact design of the mechanism is achieved, and the occupied space of the mechanism is reduced.

The invention belongs to the technical field of forging, and relates to a forging method for grain size refinement of a GH4169 alloy direct aging disc forge piece. The method comprises the following steps: blanking and chamfering edges and corners of a GH4169 alloy bar; the blank is a big-end-up cake blank with a convex outer circle, a positioning groove is formed in the upper end of the cake blank, and a deformation groove is formed in the lower end of the cake blank; the convex outer circular surface is divided into an outer inclined section which is inclined outwards, a cylindrical section, an inner inclined section which is inclined inwards and a positioning curved surface section from top to bottom; the moulding bed cavity wall corresponding to the positioning curved surface section is used for fixing the lower end of the bar; die forging is carried out on the waste blank which is turned over up and down; the positioning groove is clamped in a lower forging die cavity to be used for forming an inner transition area of the leg part and the disc part of the disc forging piece, under the constraint of the forging die, rough blank metal flows outwards, the metal between the positioning groove and the outer inclined section fills the leg part, the cylindrical section fills the center of the disc part, the inner inclined section partially fills the center of the disc part, and the disc edge of the disc part is partially filled. And the disc edge is filled with the deformed groove and the positioning curved surface section metal.

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 utility model discloses a new energy motor shaft counter R-shaped groove comprehensive testing fixture which comprises a reference block, a go gauge, a no-go gauge and two fixing blocks. The reference block is integrally in a circular ring shape, a stepped hole is formed in the center of the reference block, and an inner circular surface a and a stepped surface b of the stepped hole are positioning surfaces; the two fixing blocks are connected to the outer circle face of the reference block, containing grooves are formed in the two fixing blocks, and the containing grooves penetrate through the reference block. The go gauge and the no-go gauge are in sliding fit with the two containing grooves respectively, the detection end of the go gauge and the detection end of the no-go gauge can extend into the stepped hole of the reference block, and the tail end of the go gauge and the tail end of the no-go gauge are both connected with limiting pieces. Compared with the prior art, the device is simple in structure, convenient to use, high in detection accuracy and relatively high in detection efficiency, and is used for rapidly detecting the detected elements in the R-shaped groove of the new energy motor shaft.

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.

The invention provides a double-curved-surface quadrupole rod device, a double-curved-surface quadrupole rod system and a manufacturing method of the double-curved-surface quadrupole rod device. The double-curved-surface quadrupole rod device comprises at least one pole rod and a fixing structure. The fixing structure comprises a fixing seat, a positioning ball, a spring and a fastening screw; one part of one side of the outer surface of the pole rod is a hyperboloid, one part of the other side of the outer surface of the pole rod is a round surface, a pair of parallel planes are arranged between the hyperboloid and the planes, and the four planes jointly form the outer surface of the pole rod; the fixing base is of a three-dimensional columnar structure, the center of the fixing base is hollow, the pole rod is arranged in the fixing base, and the round face of the outer surface of the pole rod is matched with the inner surface of the fixing base. Through the design of the hyperboloid pole rod, a more ideal hyperboloid electric field can be generated, the influence of a high-order field is reduced, the trajectory offset of charged particles is avoided, and the resolution and sensitivity of the mass spectrometer are improved.

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.