180results about How to "Reduce processing deformation" patented technology

The invention discloses a machining method for a large cast titanium alloy diamond-shaped cabin shell and belongs to the machining method for a complex piece. The machining method for the large cast titanium alloy diamond-shaped cabin shell includes the following steps: step 1, machining a base and measuring; step 2, carrying out three-dimensional scanning on a blank and detecting; step 3, carrying out self-adaption machining on a rough base; step 4, roughly machining the shape; step 5, detecting the size and performing three-dimensional scanning; step 6, performing heat treatment; step 7, performing three-dimensional scanning and detecting; step 8, finishing the base; step 9, finishing the shape; step 10, detecting the shell. The machining method for the large cast titanium alloy diamond-shaped cabin shell is capable of comprehensively analyzing the cast size precision and allowance, quickly determining the machining base, controlling the wall thickness uniformity and guaranteeing the shell quality, has small machining deformation, and enables the manufacturing cycle to be shortened.

The invention relates to a method and a clamp for moulding surface positioning clamping of a finish forge blade. According to the method, a vane is subjected to positioning clamping through a basin mounding surface of the blade, an inner side moulding surface of a blade root marginal plate, and a V point on the inner side mounting surface of the blade root marginal plate, by the positioning of an air inlet edge, and the clamping of a back mounding surface of the blade, as well as by using a high-accuracy positioning adhesive, and an adhesive coating method, and through a positioning block of the basin moulding surface of the blade and a clamping block of the back moulding surface of the blade. According to the method and the clamp, a satisfying contact area can be obtained by adoption of the high-accuracy adhesive, and the positioning rigidity of the blade is enhanced by adoption of the basin moulding surface of the blade, the inner side moulding surface of the blade root marginal plate and the V point on the inner side moulding surface of the blade root marginal plate for the positioning. According to the method and the device, the problems that the accurate positioning is difficult to realize and the moulding surface of the blade deforms or is damaged because the blade is thin, the blade body is small and the moulding surface is complex are solved. By the method and the device, the positioning accuracy of the mechanical processing of the blade is improved, and the technological process is optimized, so that the processing quality and the production efficiency of the blade are improved, the process is simple, the number of fixtures is reduced, the processing cycle is shortened, and the production cost is reduced.

The invention provides a machining method of an aircraft engine crankcast. The machining method can solve the problems that when an existing crankcast machining method is used, crankcast deformation is large, machining precision is low, the manufacturing period is long, and the machining difficulty is large. The method comprises the following steps of blank dimension re-inspection, rough turning of a large end and a small end, rough milling of shape contour, stress relief heat treatment, trimming of a large end datum and a small end datum, finish milling of two side faces of a longitudinal installing side and longitudinal installing side holes, segmentation, grinding and trimming of wire-electrode cut end faces, pre-assembling, semi finish turning of the large end and the small end, drilling of angular locating holes, semi finish milling of the shape, finish turning of the small end, finish milling of the shape and a small end installing side hole, finish reaming of the longitudinal installing side holes, finish turning of the large end, finish milling of a large end installing side hole, thread tapping, laser marking, dying check, fluorescence penetrant inspection and final inspection.

The invention discloses a flexible clamp for milling a thin-walled workpiece with a complex curved surface, and belongs to the field of machining. The flexible clamp comprises a vice clamp, a fluid carrying trough for accommodating a magnetorheological fluid, a magnetoresistive plate frame arranged at the upper part of the fluid carrying trough, and plate electrodes for providing a horizontal magnetic field, wherein the left side of the magnetoresistive plate frame is connected with a lead screw through threads; the right side of the magnetoresistive plate frame sleeves a supporting and positioning rod in a matching way; the upper end of the lead screw is connected with an operating crank; and the operating crank can drive the lead screw to rotate and drive the magnetoresistive plate frame to rise and fall. The flexible clamp provided by the invention can effectively reduce the machining deformation of the thin-walled workpiece with the curved surface, effectively restrains the vibration of the thin-walled workpiece with the curved surface during milling, lowers the machining noise, reduces the machining error, and guarantees high machining efficiency and high surface machining quality.

The invention relates to a processing method of a large-scale thin-wall cabin shell body. The processing method comprises the steps of 1, reserving a criterion boss on the shape of the shell body when casting the shell body, conducting rough machining on the lineation criterion, leveling a front and back end surfaces of the shell body, and conducting rough machining on the front and back end surfaces of the shell body; 2, conducting rough machining on shape and an inner cavity of the shell body according to the processing criterion in the step 1, conducting aging treatment after the rough machining, and detecting form and location tolerance deformation quantities of the shell body before and after the aging treatment; 3, analyzing remaining quantities of various parts of specially shaped end of the shell body according to a deformation rule of the shell body, judging whether there is a need to borrow quantity, finishing semi-finishing on the shape and the inner cavity of the shell body, and conducting aging treatment after the semi-finishing; 4, detecting the form and location tolerance deformation quantities before and after the aging treatment of the shell body in the step 4, further figuring out the deformation rule of the shell body, and finishing finish machining of the shell body; 5, finally detecting all the sizes of the shell body and storing the shell body into a storage after the shell body is qualified. The invention also relates to a clamp used according to the method. The processing method can improve sharply processing efficiency, guarantee the quality of a product, causes a small processing deformation, and can guarantee the homogeneity of shell wall thickness.

The invention belongs to the technical field of intelligent processing and manufacturing, and particularly discloses an integrated active-passive compliant one-dimensional variable force grinding andpolishing device and a control method. The integrated active-passive compliant one-dimensional variable force grinding and polishing device comprises a linear module servo motion platform, a mountingflange, a limiting plate, a position and orientation sensor, a speed-adjustable compliant grinding and polishing mechanism and a controller, and the linear module servo motion platform is used for driving the grinding and polishing mechanism to perform linear motion; the mounting flange and the limiting plate are mounted on a base of the linear module servo motion platform, and the position and orientation sensor and the speed-adjustable compliant grinding and polishing mechanism are installed on the limiting plate; and the position and orientation sensor is used for measuring position and orientation of the one-dimensional variable force grinding and polishing device and sending the position and orientation to the controller, a force sensor is arranged between the compliant grinding and polishing mechanism and sliding blocks, the force sensor is used for collecting a contact force signal and send to the controller which can calculate speed control quantity, and the speed-adjustable compliant grinding and polishing mechanism is driven to move by rotation of a servo motor according to the speed control quantity. According to the integrated active-passive compliant one-dimensional variable force grinding and polishing device and the control method, the contact status of a abrasive belt and a workpiece can be adjusted in real time, and a stable and compliant grinding and polishingprocess is realized.

The invention discloses a thin-walled bearing ring lathing process. The thin-walled bearing ring lathing process includes the following steps of firstly, conducting rough lathing, wherein the outer circle, the inner hole, the ditch and the two end faces of a thin-walled bearing ring part are lathed in a numerical control mode, a balance of 0.3 mm to 0.5 mm is controlled to be reserved for the outer circle, a balance of 0.6 mm to 0.8 mm is reserved for the inner hole, a balance of 0.2 mm to 0.3 mm is reserved for the ditch, and a balance of 0.2 mm to 0.5 mm is reserved for the two end faces; secondly, conducting annealing, wherein the roughly-lathed thin-walled bearing ring part is annealed at a temperature of 650 DEG C to 680 DEG C for 3 hours to 4 hours and then cooled in a furnace till the temperature reaches 180 DEG C to 200 DEG C and cooled outside the furnace through air; thirdly, conducting fine lathing, wherein the outer circle, the inner hole, the ditch and the two end faces of the annealed thin-walled bearing ring part are latched in a numerical control module, and the sizes of the outer circle, the inner hole, the ditch and the two end faces are lathed into the sizes required by grinding. In this way, the machining deformation of a thin-walled bearing ring can be reduced, and the machining accuracy of a product can be ensured.

The invention provides a processing method for a stop plate-free split casing. The processing method for the stop plate-free split casing comprises the following steps: milling the external profile section of a part into two semicircles with offset at a roughing stage; turning an internal profile section into a circle; performing finish milling on the back face of the junction surface of the casing to meet the set tolerance requirements; performing linear cutting along the junction surface of the casing to cut off the casing and performing the finish milling on the junction surface to meet the set tolerance requirements, and connecting the two half casings by using bolts at the junction surface of the casing to finish reassembly of the casing; performing finishing on the internal profile and the external profile of the casing. After roughing, the non-uniform wall thickness of the casing is formed; after the casing is cut off by the linear cutting, the finish milling is performed on the junction surface and the casing is reassembled, uniform finishing allowance can be obtained by the external profile of the casing, and the uniformization of the allowance of the external profile of the casing is realized, and therefore, the processing difficulty is lowered; the finishing of the external profile can be finished by one-pass, so that machining deformation is reduced, and the machining efficiency is improved.

The invention belongs to the technical field of forging, and relates to a forging method for an ultra-large titanium alloy whole frame forged piece. The forging method includes the following steps that firstly, blank manufacturing is performed, wherein an initial blank is prepared through a local upsetting method or a machining method; the prepared initial blank is longitudinally drawn long on a free forging and pressing machine; the free forging and pressing machine presses down a material opening plate which reciprocates so that the blank can be transversely drawn long; the blank is placed on a die forging and pressing machine to be subjected to loose tooling forging, and the outer contour of the blank reaches the outer contour size of the forged piece; and wad piercing burr, corresponding to an inner hole of the forged piece, of the blank is cut and removed; and secondly, die forging is performed, wherein positioning forging is performed; pre-forging is performed; and final forging is performed. According to the forging method for the ultra-large titanium alloy whole frame forged piece, production of the ultra-large whole frame forged piece is achieved through the method, and the forging method has the beneficial effects of being simple in technology, good in economical efficiency, good in mechanical performance of the forged piece and the like.

The invention relates to the technical field of display, and particularly relates to a supporting structure and a display device. The supporting structure is arranged on one side of a flexible displaypanel and comprises a bendable area and fixing areas, wherein the bending axis corresponding to the bendable area extends in the first direction, and a plurality of first hollowed-out holes are formed in the bendable area; the fixing areas are positioned on the two opposite sides of the bendable area in the second direction, and the second direction intersects with the first direction; each fixing area is provided with a rigidity keeping part and a buffering part provided with a plurality of second hollowed-out holes; the buffering parts are connected with the bendable area, and the rigidityof the buffering parts is larger than or equal to that of the bendable area; at least part of the rigidity keeping parts are arranged on the sides, away from the bendable area, of the buffering parts,and the rigidity of the rigidity keeping parts is larger than that of the buffering parts. By means of the design, the structural stability of the supporting structure can be guaranteed, and the impact resistance and bending resistance of the flexible display panel are enhanced.

The invention relates to a split knotter which belongs to the field of agricultural mechanical equipment. A drive shaft is installed in a shaft hole I of a main installation frame; a rope clamping drive mechanism and a split drive disk mechanism are coaxially installed at both ends of the drive shaft; a cam swinging rod is installed on a shaft hole III of the main installation frame, and the cam swinging rod and the split drive disk mechanism form a cam mechanism; the rope clamping mechanism and a rope clamping right helical gear are coaxial and are installed on a shaft hole V of the main installation frame; a rope clamping left helical gear is installed on a shaft hole VI of the main installation frame; an olecranon intermittent gear and an olecranon tongue are axially connected with an olecranon shaft respectively and installed on a shaft hole II of the main installation frame; and the olecranon tongue and the main installation frame form a small cam mechanism. Key mechanisms of the invention are formed by combining split parts, thereby reducing the processing deformation of integrated parts and the manufacture and maintenance cost of a press baler, being beneficial to the adjustment of relative positions during assembly, overcoming the defect of replacing the whole part due to the damage of a structure, prolonging the service life of the knotter and enhancing the processing strength of the parts.

The invention discloses a numerical control processing method and device for a complex molded surface of a rotor blade of an air compressor. The processing method comprises the steps of clamping the blade, selecting a milling cutter, and determining the milling mode of the blade and the milling sequence of the blade, wherein the back end of the blade is clamped through tightening; the milling cutter adopts a cylindrical cutter; the milling mode of the blade is spiral surrounding milling; and the milling sequence of the blade is that firstly, the edge is cut, then, a blade body is milled, then, a margin plate is milled, and finally, a root is milled. According to the processing method, the deformation in processing is reduced, the geometric accuracy and positional accuracy of the blade are guaranteed, the service life of the cutter is prolonged, the integrity of the blade surface is improved, the processing efficiency is improved, and the problems of overcutting and disorder of a cutter path are solved.

The invention discloses a method for eliminating residual stress of an aluminum alloy die forging piece. The method comprises the following steps: step 1: carrying out cold pressing on the aluminum alloy die forging piece subjected to solution hardening treatment; step 2: carrying out deep cooling treatment on the forging piece subjected to the cold pressing; step 3: carrying out rapid temperature-rising double-grade ageing treatment on the forging piece subjected to the deep cooling treatment; step 4: carrying out air cooling on the forging piece subjected to the rapid temperature-rising double-grade ageing treatment. Aiming at reducing the residual stress, a cold pressing finishing die is used for carrying out cold-pressing deformation on the die forging piece firstly; then the die forging piece is put into liquid nitrogen and is subjected to the deep cooling treatment; then the temperature of the forging piece subjected to the deep cooling treatment is rapidly raised and the double-grade ageing treatment is carried out. The residual stress of the aluminum alloy die forging piece can be reduced by 90 percent or more through treatment of a solution hardening, cold pressing, deep cooling and ageing combined technology; the method is especially suitable for the large-size and high-strength aluminum alloy die forging pieces with complicated shapes.

The invention belongs to the technical field of aero-engines, and discloses a compressor blade machining method. The compressor blade machining method includes the steps that step 1, three-dimensionalmeasurement is carried out, specifically, a crest curve and a trough curve are built by extracting actual curve crest points and trough points of cross sections according to a three-dimensional diagram of a compressor blade; virtual curves of a blade body and a jog are built; step 2, point cloud is extracted, specifically, curvatures of the actual curve, the crest curve and the trough curve of the step 1 are analyzed, and the curves of the crest curve and the trough curve are regulated according to actual curve curvatures; a center line is built according to the crest curve and the trough curve; step 3, a hook face is rebuilt, specifically, a mesh hook face is built with center lines of the cross sections to generate a three-dimensional digital model; step 4, procedures are regulated, specifically, the blade three-dimensional digital model is imported to a three-dimensional software and corrected compared with blade master body data scanned by the three-dimensional software; and step5, numerical control machining is carried out, specifically, numerical control programming is carried out according to the blade three-dimensional digital model of the step 4, and a blade is subjectedto numerical control milling with a ball end milling. According to the compressor blade machining method, the blade precision and the surface roughness of a compressor can be effectively ensured.

The invention discloses a precise positioning fixture for numerical control machining of thin-wall blade. A tenon root positioning disk on a revolving workbench is provided with a blade tenon root mounting slot, an axial oil duct of the tenon root positioning disk and a radial oil duct of the tenon root positioning disk; one end of a positioning spindle is fixedly connected with a blade tip process table via a locking plate and a casting process table, the other end of the positioning disk is connected with a connecting shaft by a bolt, and the connecting shaft is installed on a tailstock by an end cap. The invention has the advantages that blades can be processed stably and have small possibility of deforming; and in addition, the precise positioning fixture provided by the invention is simple in structure, convenient for installation and high in positioning precision and can be assembled and disassembled for multiple times without affecting the positioning precision.

The invention provides a double main shaft turning-milling combined machining method for an aeroengine case. The method comprises the following steps: dividing 16 machining regions according to a geometric structure of the case, selecting a double main shaft turning-milling combined machining machine tool, determining cutter type and size, machining process parameters and a tool path mode, planning a tool path for double main shaft simultaneous machining of an inner cavity and an outer wall of the case by utilizing UG software and a Post Builder provided by the software, and converting the tool path into a numerical control instruction used for seven-coordinate five-linkage double main shaft simultaneous machining and capable of being executed by a Huazhong numeral control system HNC-848. The method can finish turning-milling combined cutting and vertical and horizontal double main shaft simultaneous machining of the complex case by one-time clamping and positioning, improves the machining efficiency, effectively controls machining deformation, and provides a total solution for numerical control machining of the aeroengine case in China.

The invention discloses a compound clamping mechanism of a machine tool, which belongs to the field of machine tool fixtures. The compound clamping mechanism of the machine tool comprises a sliding rail, a large adjusting screw rod, a moving block, a large clamping block, a small adjusting screw rod, a fixed block and a small clamping block, wherein the upper end of the sliding rail is clamped on a flange at the lower end of the moving block; the large adjusting screw rod is engaged with the moving block; the lower end of the small clamping block is embedded into a dovetail groove at the lower end of a groove of the large clamping block; the small adjusting screw rod is engaged with the fixed block; one end of the small adjusting screw rod is fixedly connected with the small clamping block. The compound clamping mechanism of the machine tool solves the problems that according to the existing clamping mechanism, the labor intensity is large, the auxiliary time for parts processing is long, the universality is low due to a special fixture, and the like, and has the advantages of simple structure, reasonable design, and easiness in manufacturing.

The invention belongs to mechanical cool-working technology, which relates to an intensity enhancing method to process ultra-thin complex parts. The invention casts low melting point alloy outside the parts to process ultra-thin (<= 0.5mm) complex cavity parts. It can process ultra-thin products with different shapes to meet the lightweight requirements. It has small processing distortion and the roundness errors of the processed holes are controlled within 0.007mm. It has high processing precision and can realize multi-surface process with one clamping, which can guarantee the correlating size precision. The shapes of the workpieces can be designed as cuboids to facilitate the clamping and positioning.

The invention discloses a special fixture for milling long and thin axle parts. A three-jaw chuck is fixedly connected with the upper surface of a base of the fixture and is fixedly connected with an inner ring of a bearing, the outer ring of the bearing is fixedly connected with a support arm, the bottom of the support arm can rotate around the bearing and support in a round sliding chute by taking the three-jaw chuck as the center of a circle on the upper surface of the base of the fixture in a sliding manner, a support arm is provided with a handle, a handle box, a hand wheel handle and a tailstock, the handle box is connected with the hand wheel handle and the tailstock, the hand wheel handle controls the tailstock to longitudinally move along the support arm, the tailstock is connected with a tip block, the tip block is connected with a tip locking handle, a tip is fixed on the tip block and realizes clamping by combining a tapered hole on the end face of a part, and the tip locking handle finely adjusts the tip to longitudinally shift along the support arm and lock a tip device. The special fixture disclosed by the invention can effectively slow down processing deformation, and the support arm is prevented from rotating and interfering with a milling cutter, thus the machining accuracy of milling on the long and thin axle parts can be obviously improved, the cost can be reduced and the productivity can be improved.

The invention discloses a wall thickness uniformity control milling method for a thin-wall structural part. A workpiece model and J C constitutive model are imported into ABAQUS finite element analysis software. milling path simulation is carried out according to the optimal milling process parameters determined by the high-speed milling test; According to a simulation result, a combination scheme of different overall feeding modes and feeding paths in a cavity is formulated, and finally, an optimal feeding path scheme is determined through a wallboard milling test, so that workpiece deformation is most beneficial to keeping of wall thickness uniformity in the milling process, and wall thickness uniformity control is achieved. The whole feeding path is bilaterally symmetrical, a compositefeeding mode combining spiral feeding and cycloid feeding is adopted in a single cavity, the machining time is short, and the stability of the machining process is improved; The machining deformationof the wallboard structural part is reduced by 40%, the machining efficiency is improved, the service life of a cutter is prolonged, and the machining cost is reduced.

The invention relates to a high-cavity precision bottle cap die of a novel HALF block structure. The high-cavity precision bottle cap die comprises an HALF block (3), a cavity (5), a large slider A (1), a large slider B (2) and a wedge block (4), wherein a positioning taper hole and a positioning straight hole are formed on the upper and lower end faces of the HALF block (3), respectively; inclined surfaces are formed on the two sides of the HALF block (3); the cavity (5) is fitted and mounted inside the positioning taper hole; the wedge block (4) is in close fit with the inclined surfaces; a push ring (6) is fitted and mounted inside the positioning straight hole; the large slider A (1) and the large slider B (2) are arranged under the HALF block (3); a cooling water core (8) is in fit connection with a threaded core (7); a push pipe (9) is sleeved inside the cooling water core (8); and an inner core (10) is mounted inside the push pipe (9). The high-cavity precision bottle cap die is small in boundary dimension, low in manufacture cost, high in die fit precision and stable in operation, easily guaranteed in processing precision and long in service life.

The invention discloses a steel casting heat treatment technology. The technology utilizes ZG25CrNiMo and is characterized by comprising carrying out primary high-temperature normalization on a casting at a temperature of 940-950 DEG C after casting, carrying out thermal insulation for 10-12h, discharging the casting out of a furnace, carrying out air cooling, carrying out secondary grain refinement normalization at a temperature of 880-900 DEG C, carrying out thermal insulation for 8-10h, carrying out hardening and tempering heat treatment after the casting passes through rough machining inspection, wherein the hardening and tempering heat treatment process comprises hardening at a temperature of 850+ / -10 DEG C, thermal insulation for 6-8h, tempering at a temperature of 660-680 DEG C and thermal insulation for 6-9h, and carrying out discharging and air cooling. The steel casting heat treatment technology can eliminate thermal stress through heat treatment after casting, improves machinability and reduces processing deformation. Heat treatment after rough machining improves general mechanical performances of a product and prolongs a service life.

In a rotary electric machine laminated core, a rotating shaft portion is disposed closer to an outer circumferential surface than an inner circumferential surface of a back yoke portion. A notch portion is disposed on at least one of first and second end portions of the back yoke portion so as to form a gap between a vicinity of the rotating shaft portion of a projecting portion and a recess portion when core segments are arranged in an annular shape or a circular arc shape. The first end portion and the second end portion of the back yoke portion are configured such that a predetermined gap that connects from the outer circumferential side to the inner circumferential side is formed between adjacent projecting portions and recess portions when the core segments are expanded rectilinearly such that magnetic pole tooth portions are parallel to each other.

The invention relates to a multifunctional power divider, belonging to the technical field of power dividers. The multifunctional power divider comprises a shell, a powder dividing bar and a coupler, wherein the shell is internally provided with the powder dividing bar; two ends of the powder dividing bar are respectively connected with a contact pin of the coupler; the shell is connected with a shell of the coupler; the powder dividing bar is divided into two sections; and the two sections are connected with each other by a stud thread. By adopting a form of combining an air cavity and an internal conductor, the novel cavity power divider not only meets the requirements for the coverage bandwidth and the power, but also guarantees the internal conductor not to be easily deformed and to have high fidelity and reduces the requirement on the processing accuracy in the production process, thus improving the production efficiency.

The invention discloses a multifunctional power divider, and relates to the technical field of power dividers. The multifunctional power divider comprises a shell, a power dividing bar and a connector, wherein the shell is internally provided with the power dividing bar, both ends of the power dividing bar are connected with pins of the connector respectively, the shell is connected with a shell of the connector, the power dividing bar is divided into two segments, and the two segments are in threaded connection through a stud. According to the invention, an air cavity and inner conductor combination mode is adopted, thereby not only being capable of meeting requirements in coverage bandwidth and power, but also being not easy to cause deformation in inner conductor and high in simulation degree. Meanwhile, the required processing precision in the production process is reduced, and thus the production efficiency is improved.

The invention relates to a power divider, belonging to the technical field of power dividers. The power divider comprises a shell, a powder dividing bar and a coupler, wherein the shell is internally provided with the powder dividing bar; two ends of the powder dividing bar are respectively connected with a contact pin of the coupler; the shell is connected with a shell of the coupler; the powder dividing bar is divided into two sections; and the two sections are connected with each other by a stud screw thread. By adopting a form of combining an air cavity and an internal conductor, the power divider not only meets the requirements for the coverage bandwidth and the power, but also guarantees the internal conductor not to be easily deformed and to have high fidelity and reduces the requirement on the processing accuracy in the production process, thus improving the production efficiency.

The invention discloses a dried type clamp for quilting and grinding an air cylinder sleeve. The clamp comprises a fixed outer sleeve, a spring sleeve and a positioning base, wherein the fixed outer sleeve is nested in the positioning base; a spring is mounted in a spring mounting hole which is sleeved outside a lug boss below the inner wall of the fixed outer sleeve; at least one internal conical face is arranged on the inner wall of the fixed outer sleeve; the spring sleeve is mounted in the fixed outer sleeve; the lower end of the spring sleeve is arranged on the spring; the outer circumference face of the spring sleeve is provided with an external conical face matched with the internal conical face on the inner wall of the fixed outer sleeve; and a vertical opening is arranged on the spring sleeve. The inner circumference face of the fixed outer sleeve and the conical face on the outer circumference face of the spring sleeve are in compact contact so that the inner hole of the spring sleeve and the outer circumference of the air cylinder sleeve can be ensured to be in gapless contact; the machining deformation of the air cylinder sleeve is small; and the machining precision is high. Furthermore, a gap is reserved between the inner circumference face of the spring sleeve and the outer circumference of the air cylinder sleeve, so that the scrapping rate of the outer circumference face of the air cylinder sleeve is reduced and the yield is improved.

The invention relates to a stress uniformizing method for a high-temperature alloy casing ring forging. The circumference lengths L1 and L2 at the maximum ring diameter position and the minimum ring diameter position of the high-temperature alloy casing ring forging are measured, the yield stress sigma and required strain epsilon of high-temperature alloy are obtained through a material tensile test, and a bulging mold is manufactured according to the cross section shape and size of the high-temperature alloy casing ring forging; the high-temperature alloy casing ring forging is heated to be lower than the forging temperature and is placed in the bulging mold after soaking, a bulging cone head operates downwards by H1 and then returns after being kept for a period of time, the high-temperature alloy casing ring forging is rotated by a certain angle around the axis of the ring forging, and the bulging cone head operates downwards by H2 on the basis of H1 and is kept for a period of time, so that it is guaranteed that all positions of the high-temperature alloy casing ring forging are in the state of micro plastic deformation; and finally, the bulging cone head returns, and the high-temperature alloy casing ring forging is taken out and air-cooled to the room temperature. Uniform circumferential plastic strain is applied to the high-temperature alloy casing ring forging through the minimum deformation so as to adjust uniform distribution of residual stress.

The invention discloses a machining deformation control method in the milling process of an aluminum alloy thick plate. The machining deformation control method in the milling process of the thick aluminum alloy plate comprises the following steps: 1, a blank finite element model is established, and the length of the blank finite element model is L, the width of the blank finite element model is W, and the height of the blank finite element model is H; 2, a groove is formed in the blank, wherein the groove depth is H0, the groove width is W0, and the groove length is L0; 3, unit separation faces are divided in the blank in ABAQUS software according to the shapes of the grooves and the parts and the initial residual stress distribution state of the blank, and grids are generated; 4, a groove unit set and a part unit and node set are defined according to materials needing to be removed in the part machining process and the removing sequence of the materials. According to the machining deformation control method in the milling process of the thick aluminum alloy plate, the effect of inhibiting machining deformation of the aluminum alloy component is good.

The invention relates to a cavity power divider, relating to the technical field of power dividers. The cavity power divider comprises a shell, a powder dividing bar and a coupler, wherein the shell is internally provided with the powder dividing bar; two ends of the powder dividing bar are respectively connected with a contact pin of the coupler; the shell is connected with a shell of the coupler; the powder dividing bar is divided into two sections; and the two sections are connected with each other by a stud screw thread. By adopting a form of combining an air cavity and an internal conductor, the power divider not only meets the requirements for the coverage bandwidth and the power, but also guarantees the internal conductor not to be easily deformed and to have high fidelity and reduces the requirement on the processing accuracy in the production process, thus improving the production efficiency.