11results about How to "Improve shape and position accuracy" patented technology

The invention relates to the technical field of laser beam machining, in particular to a method and system for machining a resonant gyroscope curved surface electrode based on femtosecond laser, and the method comprises the following steps: clamping an electrode base on a femtosecond laser galvanometer five-axis linkage machining platform; the center axis of the curved surface electrode and the laser beam coincide with the rotating axis of the femtosecond laser galvanometer five-axis linkage machining platform, and the accurate coordinates of the laser beam in a machine tool coordinate system are determined; performing spherical surface specificity modeling on the electrode base to obtain a control code; a control code is input into a machine tool control system, after control parameters are adjusted, femtosecond laser five-axis linkage machining is conducted on the electrode base, and reflected light signals are transmitted to a computer through a real-time observer in the machining process. The method and the system provided by the invention solve the technical problem that the processing precision and the processing quality of the curved surface electrode are difficult to meet the requirements due to film layer flanging, recasting and substrate cracking caused by a heat effect.

The invention discloses a roll bending forming manufacturing method for a thin-wall titanium alloy cylindrical part. The roll bending forming manufacturing method comprises the steps of material preparation, roll bending forming, shaping and pretreatment before welding, longitudinal seam welding and heat treatment shaping. The roll bending machine is improved in design, a plurality of wedge-shaped cushion blocks are designed on the lower side of the lower roll, the contact surface between the upper wedge-shaped block and the lower wedge-shaped block is a 5-degree conical surface, and the height change of the upper plane and the lower plane of the wedge-shaped blocks, fine adjustment (jacking or loosening) of the height of the lower roll and compensation of the center-to-center distance value of the upper roll and the lower roll are achieved by rubbing the relative positions of the pair of wedge-shaped cushion blocks front and back. Consistency of forming radiuses of a port area and a central area of the cylindrical part is guaranteed, and a standard cylindrical shape is obtained. The heat treatment shaping measure is different from a conventional process, the stainless steel core rod heat treatment tool penetrates into the titanium alloy cylindrical part, heat expansion shaping of the cylindrical part is achieved through the core rod by means of the heat expansion difference of different materials at the high temperature, and it is guaranteed that the outer diameter of the cylindrical part is + / -0.2 mm when the cylindrical part recovers to the room temperature state.

The present application relates to mechanical automation assembly and coking equipment technical field, specifically for the coal hole cover assembly device and method for coke oven closed scene, including annular rotary base and indexing turntable, with positioning column and pneumatic self-centering claw of accompanying pallet, multiple operation stations and industrial computer; The device drives the clamped coal hole cover blank by the indexing turntable, and sequentially flows between the tamping filling, welding, feeding grinding and bell jar test stations; Its core is to realize the single reference continuous flow of workpiece relying on the accompanying pallet, and cooperate with the dustproof gas curtain blowing off the refractory dust; The present application discards the traditional multiple lifting mode, overcomes the secondary clamping error caused by repositioning in the harsh environment, ensures the cleanliness of the clamping surface, and improves the shape and position accuracy of the workpiece in the whole assembly process.

The application discloses a high-lifting oil cylinder base boring machining equipment, which comprises a positioning structure unit and a boring machining unit. The positioning structure unit comprises a positioning base, a positioning driving assembly, a moving seat, a positioning plate, a longitudinal fixing assembly and a transverse fixing assembly. The moving seat is installed on the positioning base through the positioning driving assembly. The positioning plate is installed on the moving seat. A plurality of parallel long-slot clamping grooves are formed in the positioning plate. The longitudinal fixing assembly is installed at one end of the positioning plate. The transverse fixing assembly is detachably installed at the other end of the positioning plate. Through the cooperation of the positioning structure unit and the boring machining unit, the high-lifting oil cylinder base can be accurately positioned, fixed in multiple dimensions and adaptively bored.

The present application relates to the technical fields of intelligent manufacturing and automation control, and discloses a kind of intelligent regulation and control methods for the wall thickness of crucible spin pressing in piezoelectric single crystal growth, comprising: collecting data in the process of spin pressing, and obtaining stable acquisition sequence by preprocessing;Stable acquisition sequence is fused by adaptive weighted fusion and Kalman filtering, and the fused wall thickness is obtained by fusing the laser thickness value and the wall thickness value and compensation value respectively mapped by the spin pressing force, torque and eccentricity;Calculate the comprehensive deviation vector of wall thickness deviation, local wall thickness thinning rate, eccentricity deviation and roundness error;Based on the comprehensive deviation vector and the wall thickness deviation, the fuzzy adaptive PID output correction value and the hierarchical threshold comparison are executed in parallel to generate pass jump and trajectory reconstruction instructions, and the closed-loop cooperative control is formed by issuing the numerical control spin pressing system;After each pass is completed, the wall thickness distribution is obtained by fusion and solution, and the deviation is determined to add compensation pass or trajectory reconstruction, and iteration is carried out until the requirements are met.The present application realizes the online intelligent closed-loop regulation and control of the wall thickness of crucible spin pressing.

The utility model discloses a kind of hydraulic bearing devices for twenty-roller mill frame machining, including outer sleeve, end cap, inner sleeve and extension sleeve, inner sleeve is coaxially arranged in the inner side of outer sleeve, and the extension sleeve coaxial with it is integrally formed and processed in one end of outer sleeve, the inner diameter of extension sleeve is less than the inner diameter of outer sleeve and forms step at the interface of both;The other end of outer sleeve is fixedly connected with end cap by bolt, and through hole for high-precision boring bar is provided in the middle of end cap. The hydraulic bearing device can make the tooling composed of high-precision wallboard and high-precision boring bar and the like, ensure the machining precision of mill frame plum-blossom cavity, make the deformation of roll system extremely small during rolling process, obtain very accurate thickness deviation in the whole width direction of rolling, and have the advantages of simple operation, high reliability, low cost and the like.

This invention discloses a method, device, and medium for compensating for the machining of large thin-walled parts using a robot. The method includes: acquiring industrial robot parameters, large thin-walled part parameters, and machining process parameters; establishing a kinematic model based on the industrial robot parameters, and identifying the robot's joint stiffness matrix based on the kinematic model; establishing an end-effector stiffness performance evaluation index based on the joint stiffness matrix; constructing a deformation prediction model based on the machining process parameters and the large thin-walled part parameters; predicting the robot's tool tip deformation and the large thin-walled part machining deformation based on the end-effector stiffness performance evaluation index and the deformation prediction model, respectively; and adjusting the robot's pre-determined theoretical machining pose according to the robot's tool tip deformation and the large thin-walled part machining deformation to determine the compensated actual machining pose. This method achieves a significant improvement in the dimensional and positional accuracy of large thin-walled part machining.

The utility model discloses a center positioning device for supporting a boring bar, which comprises a shell, wherein a circular mounting hole is formed in the middle of the shell; a first crossed roller bearing and a second crossed roller bearing are arranged in the circular mounting hole; bearing inner sleeves are arranged on inner rings of the first crossed roller bearing and the second crossed roller bearing, and threaded spring chucks are arranged on inner rings of the bearing inner sleeves; and four groups of positioning and supporting assemblies are arranged on the inner side of the shell at equal intervals in the circumferential direction. According to the utility model, the threaded spring chuck is coaxially sleeved on the boring rod to realize the rotary connection between the shell and the boring rod, and the four groups of positioning and supporting components on the shell are adjusted to drive the ejector rod to extend outwards and be attached to the inner wall of the large pipe fitting, so that the axes of the boring rod and the large pipe fitting are overlapped; the boring bar self-weight deformation supporting problem in the shafting boring process is effectively solved, the using effect in the shafting boring process is good, the machining quality is guaranteed, practicability is high, and the shafting boring bar self-weight deformation supporting device has wide market prospects.

The invention discloses a centering device and a centering method for a control rod drive wire test, which can achieve higher form and position precision by using a centering tool for machining, solves the problem of low centering precision, adopts a building block type structural design, reduces the weight of a single piece, improves the stability in a positioning process, and improves the production efficiency. Repeated disassembly and assembly do not need re-centering and re-positioning; according to the technical scheme, the device comprises an upper barrel, a lower barrel, an upper hanging basket, a lower hanging basket and a centering mechanism; the upper hanging basket and the lower hanging basket are arranged in the lower barrel; centering mechanisms are arranged in the upper hanging basket, the lower hanging basket and the upper barrel; the upper cylinder body and the lower cylinder body are connected through a reactor core upper plate supporting frame; the upper hanging basket is connected with the lower hanging basket through a flange; the first centering tool, the second centering tool, the third centering tool, the fourth centering tool, the fifth centering tool, the sixth centering tool and the seventh centering tool are sequentially arranged from bottom to top, and the centering tools are matched with the grooves of the adjacent centering tools in an inserted mode.

This utility model discloses a rocket-assisted unmanned aerial vehicle (UAV) launch device, relating to the technical field of UAV launch equipment. The device includes a base, a launch pad, and a constant-force release mechanism. The base achieves 360° heading adjustment via a rotating gear. The base support is hinged to the launch pad. An adjustment component can adjust the launch pad's pitch angle. An inverted T-shaped slide rail on the launch pad cooperates with the UAV's slider. The constant-force release mechanism ensures the UAV is released when the rocket thrust reaches the specified level. This device offers flexible heading adjustment, precise pitch angle adjustment, and stable and reliable launch and release, effectively improving the efficiency and safety of UAV launches.

The invention relates to the technical field of milling, and discloses a milling tool and a design method thereof. The milling tool comprises a tool bit and a tool bar which are in threaded connection; a plurality of cutting edges are evenly distributed on the tool bit in the circumferential direction. One axial end of the tool bit is provided with a tool bit interface; a plurality of positioning islands are uniformly distributed on the tool bit interface, a plurality of positioning surfaces formed on the tool bit interface comprise three positioning surfaces to which each positioning island belongs, and the three positioning surfaces are planes and consist of two side surfaces and a middle surface; the side center lines of all the positioning islands extend through the axial center of the tool bit; the side faces of all the positioning islands do not interfere with each other in a radial space during machining; one axial end of the cutter bar is provided with a cutter bar interface; a plurality of positioning grooves matched with the positioning island structures are uniformly distributed in the cutter bar interface; according to the scheme, the limitation brought by an existing positioning island structure is broken through, a milling tool is manufactured by replacing a precision pressing technology with machining, the positioning precision can be continuously kept, the form and position precision is obviously improved, and the continuous machining quality is ensured while the tool performance is improved.