36 results about "Machining deformation" patented technology

The utility model discloses a kind of processing devices for preventing magnesium alloy steering cast pipe center hole processing deformation, belong to magnesium alloy steering cast pipe processing technical field, including four-axis machining rotary table, the movable end of four-axis machining rotary table is fixedly connected with base plate;The upper end of base plate is installed with double-station processing clamping mechanism;The magnesium alloy steering cast pipe body is constituted by first processing surface, second processing surface and center hole processing surface;The double-station processing clamping mechanism includes first placement limiting component and second placement limiting component.By the above-mentioned mode, the compacting force of the device to the magnesium alloy steering cast pipe body can be flexibly adjusted;Avoid the center hole processing surface of the magnesium alloy steering cast pipe body during rough and fine machining, the problem that the diameter of the center hole processing surface appears out-of-tolerance, roundness out-of-tolerance and the magnesium alloy steering cast pipe body appears deformation caused by continuous compacting force.

This invention relates to a method for preparing high-performance aluminum alloy radiator plates. The method involves controlling the iron-silicon ratio of the main impurity component in the melt to be no less than 1.9 to reduce internal cracks in the cast billet and decrease the machining deformation rate of the finished product. This is achieved by adding aluminum-titanium alloy and a grain refiner in the furnace and online runner, while ensuring that the titanium content in the aluminum alloy ingot is maintained within a reasonable range, resulting in an ingot grain size ≤1. This improves the mechanical properties, uniform microstructure, and refined grains of the aluminum alloy radiator plate. Simultaneously, a small amount of copper is added, and the final rolling temperature is controlled at 330-360℃, resulting in fully recrystallized grains within the aluminum alloy plate. This improves the strength of the aluminum alloy radiator plate while eliminating anisotropy in its internal mechanical properties and reducing internal stress, ultimately yielding a high-performance aluminum alloy radiator plate.

The application discloses a kind of coaxial hole finishing methods of multilayer ear piece, comprising the following steps: 1) inject liquid wax between ear piece, after solidification, find the right part clamped and fixed on the workbench of machine tool;2) select short drill bit, process the target hole of first end two layers of ear piece of part;3) replace long drill bit, the target hole of all ear piece of part first end is drilled through;4) the target hole on each layer ear piece of part first end is milled and is expanded;5) the target hole on each layer ear piece of part first end is roughly reamed;6) remove the wax between each layer ear piece of part first end, the target hole on each layer ear piece of part first end is precisely reamed;7) repeat step 2)-6) to the target hole on each layer ear piece of part second end is finished.The processing method of the application adopts the mode of machining, no remelt layer is left in the orifice, and the machining precision is high.

The application discloses a 1000MPa-grade extra-thick hydroelectric steel with low strain aging sensitivity, and chemical components and mass percentages of the steel include the following: C: 0.05%-0.13%, Si: 0.15%-0.35%, Mn: 0.8%-1.2%, Ni: 1.8%-2.2%, Cr: 0.3%-0.6%, Mo: 0.3%-0.6%, V: 0.03%-0.07%, Ti: 0.01%-0.03%, Nb: 0.02%-0.05%, Alt: 0.02-0.05%, S≤0.002%, P≤0.008%, N≤0.008%, and the rest is Fe and inevitable impurity elements. The application has the advantages that the steel plate can still maintain extremely low strain aging sensitivity after cold working deformation, and a stable dislocation network and nanometer precipitated phase are introduced by using a specific thermal mechanical treatment process.

The application discloses an online residual stress prediction method considering geometry-process-physical quantity, adopts a method combining experiments and finite element simulation models to create a multi-channel one-dimensional vector data set of a pre-machining residual stress field, cutting force, a cutting layer and a post-machining stress field, establishes a deep learning network model, uses the multi-channel one-dimensional vector data set to train the deep learning network model, and obtains a stress field prediction model; cutting force data in a machining process is collected online and input into the stress field prediction model, and the stress field prediction model outputs a post-machining residual stress field prediction result. The application can online predict a three-dimensional residual stress field state in a part, is expected to become a replacement scheme of traditional finite element simulation technology, further realizes digital twinning of geometry-physical quantity in a machining process, and provides a basis for a model for predicting machining deformation based on residual stress.

This invention relates to a method for controlling deformation during the processing of thin-walled components, comprising the following steps: machining a blank using a cutting tool to form a core shell, the core shell having a main shell and a secondary shell, the outer diameter of the main shell being larger than that of the secondary shell; the main shell also having a main end hole, and the secondary shell also having a secondary end hole, with a process block inside the secondary end hole; wrapping a protective strip around the surface of the main shell, forming a core shell assembly with the core shell and the protective strip; removing a portion of the material from the main shell and the protective strip using a cutting tool to form a feature hole on the surface of the core shell assembly; then removing the process block using another cutting tool; and finally separating the core shell assembly, the positioning plate, and the machine tool spindle to complete the processing. By changing the process sequence, the residual thermal stress inside the core shell is significantly released before wrapping the protective strip and then machining to form the feature hole, reducing the difference in shrinkage deformation between the protective strip and the core shell, thus improving processing accuracy and the appearance quality of the core shell assembly.

The application discloses a kind of ultra-precision additive and subtractive integrated manufacturing whole-process closed-loop control method and system, belong to high-end ultra-precision manufacturing and industry mother machine technical field.This system is based on domestic five-axis additive and subtractive integrated machine tool construction, realize the seamless connection of additive near net shaping and ultra-precision subtractive final machining under the same clamping, cooperate with digital twin pre-compensation algorithm to offset more than 95% machining deformation, and realize IT4 level and above ultra-precision precision mass production stably.The application breaks through the industry bottleneck of high-end manufacturing relying on imported five-axis machine tool, ultra-precision machining low yield, poor batch stability, equipment and process 100% domestic self-controllable, can be widely used in army artillery guided ammunition core parts, armored vehicle engine precision components, military special precision mold and other scenes.

The application discloses a small-diameter thin-wall cylinder expanding clamp and an expanding method, and the expanding clamp comprises a bottom plate, a stand column, a sliding block, a first nut, a second nut and a guide block. The first nut and the second nut are in threaded connection with the stand column, the sliding block is slidably connected to the outer surface slope of the stand column through the guide block, and the sliding block is located between the first nut and the second nut. The application is suitable for the internal expansion of the thin-wall cylinder with a diameter less than 200mm during machining, can be used for effectively supporting the inner wall of the part during machining, reducing the supporting gap and reducing the machining deformation of the part.

This invention discloses an 800MPa grade hydroelectric steel with excellent resistance to strain aging. Its chemical composition and mass percentages are as follows: C: 0.05%~0.09%, Mn: 1.2%~1.6%, Si: 0.1%~0.3%, Alt: 0.03%~0.07%, Nb: 0.02%~0.05%, Cr: 0.2%~0.4%, Ni: 0.3%~0.5%, Mo: 0.25%~0.45%, V: 0.03%~0.06%, Ti: 0.012%~0.022%, N≤0.005%, S≤0.008%, P≤0.01%, with the remainder being Fe and unavoidable impurity elements. The advantage of this invention is that it suppresses the diffusion and pinning effect of interstitial atoms at the microscopic level, ensuring that the steel plate maintains excellent low-temperature toughness after cold working deformation, and significantly reducing the strain aging sensitivity of the steel plate.

This invention discloses a deformation control milling fixture for machining thin-walled parts and its operating method. The milling fixture includes a base, a transmission mechanism, a support mechanism, and a flexible clamp. The base has a guide rail groove, the transmission mechanism is installed in the guide rail groove, the support mechanism is installed on the transmission mechanism, and the flexible clamp is disposed on the support mechanism. The base is used for fixed installation and connection to a machine tool platform, and the base has several threaded holes. The operating method of the milling fixture includes the following steps: S1: fixture assembly; S2: flexible clamp installation; S3: clamping part installation; S4: clamping part holding. In this application, the flexible support principle of springs is used to support the side of the thin-walled part, reducing the clamping deformation of the thin-walled part, reducing the vibration generated during machining, realizing stable milling machining of thin-walled parts of different sizes and shapes, and controlling the deformation of the thin-walled part during milling machining. The height adjustment function of the support mechanism can adapt to clamping parts of different heights.

The application provides a forming and machining method of a near-closed thin-wall snap ring, which comprises the following steps: firstly, designing the size of a process retaining section according to the size of a part; secondly, machining the process retaining section according to the size of the part; thirdly, cutting a material plate according to the size of the part body; fourthly, rounding the material plate according to the product diameter; fifthly, welding the process weld to obtain a cylinder for preparing the flanging forming; sixthly, in order to form a near-closed groove, the process needs to be realized in steps, that is, firstly, adopting a pre-formed U-shaped groove, and then adopting a flanging forming process; seventhly, supporting the process section in the process of flanging forming, and adopting a rolling forming method to form the product; eighthly, removing the excess material to ensure the width of the notch, and keeping the process section, which avoids the vibration of the cutter in the process of machining the thin-wall part, and better controls the deformation in the process of machining, so that good forming and machining sizes can be obtained; and ninthly, removing the process section, and forming the product in two steps, which realizes the economic and efficient machining of the near-closed thin-wall snap ring.

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.

This invention relates to a pad, a clamping fixture, and a method of using for fixing beveled steel plates, belonging to the field of tooling and fixture technology. The pad includes a block body; a protrusion fixedly disposed on the bottom surface of the block body; a clearance groove is also formed on the bottom surface of the block body; an outer arc positioning plate and an inner arc positioning plate, respectively used for conforming to the outer and inner arc walls of the steel plate, are also fixedly disposed on the bottom surface of the block body. The clamping fixture includes the aforementioned pad and a pressure-applying assembly, which applies pressure to the pad. The protrusion of the pad is attached to the end face of the steel plate, the bevel of the steel plate is accommodated in the clearance groove, the inner arc positioning plate conforms to the inner arc wall of the steel plate, and the outer arc positioning plate conforms to the outer arc wall of the steel plate. Thus, during clamping, pressure is not applied to the bevel, preventing damage to the bevel, and effectively constraining the radius of curvature of the steel plate during fixing and processing, preventing changes in curvature due to external forces or processing stress, and reducing deformation during bevel processing.

The utility model discloses an aviation engine casing shell block cover's anti -deformation processing special fixture belongs to aviation engine spare and part manufacturing technical field. The fixture includes the clamping body (1), the compression screw cap (2), the support (3) and the open sleeve (4). The clamping body (1) is equipped with the hole matching with the part outer circle, adopts H7 / g6 cooperation to realize accurate positioning, the compression screw cap (2) is connected with the clamping body thread, is used for the axial compression spare, the support (3) is fixed on the clamping body top through the bolt, and its support sleeve is adopted gap cooperation with the part high outer cylinder, provides radial support, the open sleeve (4) is the split type structure, is covered in high outer cylinder and is locked through the bolt and plays the supplementary support. The fixture through multiple anti -deformation design has solved 7075 aluminum alloy thin -walled spare processing deformation problem, has guaranteed high outer cylinder upper through -hole axis relative to the base outer circle axis position degree tolerance out -of -tolerance problem, makes the part qualified rate from less than 30% to improve to 95% above.

This invention relates to a method for optimizing machining allowances in thin-walled parts, belonging to the field of metal processing technology. It solves one of the technical problems of existing thin-walled shell-type parts: high cost and long cycle time in double-sided CNC machining, and low efficiency and high quality risk in single-sided CNC machining combined with manual grinding of the inner cavity. The invention includes the following steps: developing an initial blank model and initial machining plan; obtaining and judging the machining deformation law; correcting the initial blank model; developing a machining optimization plan; and conducting machining deformation simulation and physical verification. Based on the machining deformation law, this invention corrects the initial blank model and optimizes the machining plan accordingly, so that the allowance on the inner cavity surface is optimally distributed according to the deformation. After the pneumatic outer surface is finished, the inner cavity surface can meet the requirements of outer surface dimensions, accuracy, and weight without grinding or machining, reducing the number of machining steps on the inner cavity surface, lowering costs, improving efficiency, and reducing quality risks.

The application relates to a tooling production line and a machining method of ring frame parts, and belongs to the technical field of machine tool accessories. The tooling production line of the ring frame parts solves the problems of poor positioning precision, large machining deformation and low machining efficiency of the ring frame parts in the prior art. The tooling production line of the ring frame parts comprises a profiled tooling, the profiled tooling comprises a tooling base and a profiled pressing plate, the profiled pressing plate is detachably connected to the inner side of the tooling base or detachably connected to the outer side of the tooling base, one end of the profiled pressing plate is provided with a profiled lower limit pressing plate and a flexible supporting piece, and the other end of the profiled pressing plate is provided with a profiled supporting pressing plate; and the profiled tooling has two working modes. The profiled tooling with the two working modes is adopted, fast, reliable and high-precision clamping of the ring frame parts is realized, the machining efficiency is improved, and the machining deformation is reduced.

This invention discloses a multi-directional force fusion sensing system for an ultrasonic drilling three-jaw chuck. The three-jaw chuck has a first base jaw slide, a second base jaw slide, and a third base jaw slide evenly distributed along its circumference. A clamping force monitoring module is detachably mounted on the first base jaw slide, an axial feed force monitoring module is detachably mounted on the second base jaw slide, and a cutting torque monitoring module is detachably mounted on the third base jaw slide. When clamping the workpiece, the workpiece clamping surface abuts against the clamping force monitoring module, the axial feed force monitoring module, and the cutting torque monitoring module. By having the three monitoring modules directly abut against the workpiece clamping surface and bottom end while the workpiece is clamped, the sensor placement is moved forward to near the machining deformation zone, shortening the force signal transmission path, avoiding high-frequency noise pollution from ultrasonic vibration on the sensor signal, improving the signal-to-noise ratio and anti-interference capability of the monitoring system, and solving the problems of low measurement accuracy and high false alarm rate caused by the long signal path and the distance of sensors from the machining area in traditional monitoring methods.

This invention relates to the field of automotive parts processing technology and discloses a machining fixture for a lower suspension bracket. The fixture includes a machining table with left and right clamps on its lower surface. Clamping plates are mounted on both the left and right sides of the upper part of the machining table, and upper and lower clamps are provided on the upper surface of each clamping plate. Front and rear clamps are provided on opposite sides of each clamping plate, and a leveling mechanism is provided on the opposite side. This invention uses a positioning component that can be linked and synchronized to position and pre-clamp the lower suspension bracket in the front-rear direction, and utilizes ratchet and pawl for self-locking and anti-reverse. A motor-driven screw drives a screw block with opposite threads, enabling the clamping plates on both sides to stably and reliably perform left-right clamping actions. A telescopic cylinder drives a second clamping plate to precisely apply vertical clamping force. This clamping method, which coordinates in the front-rear, left-right, and vertical dimensions, effectively overcomes the processing deformation problem caused by the weak structural rigidity of the lower suspension bracket.

This utility model discloses a tooling for facilitating the machining of motor gear pressure plates, including a main tool body, three tool holders, a laser positioning assembly, and a dial. The roughing tool holder and the semi-finishing tool holder are welded and fixed to the main tool body. The finishing tool holder is installed by tool holder locking screws and its position is finely adjusted by opposing adjusting screws. Each tool holder is respectively equipped with a roughing insert, a semi-finishing insert, and a finishing insert. The laser positioning assembly includes a green laser emitter, a bracket, and a side pressure handle. The horizontal light emitted by the green laser emitter is parallel to the Z-axis of the machine tool and precisely passes through the tip of the finishing insert. The dial is located on the finishing tool holder. The axial misalignment of the three insert tips ensures sequential cutting. The advantages of this utility model are: machining is completed in a single clamping, significantly reducing the risk of deformation during the machining of thin-walled parts.

This invention discloses a machining device and method for C-shaped frame asymmetrical parts, belonging to the field of aerospace component machining technology. The machining device for C-shaped frame asymmetrical parts includes a base, a C-shaped frame blank, and a clamping system. The C-shaped frame blank is C-shaped and symmetrical, with positioning holes at both ends. Fixed parts, multiple connecting parts, and multiple abutting parts are symmetrically arranged on both sides. The clamping system is mounted on the base and includes two positioning clamps, multiple floating clamps, multiple auxiliary clamps, and two fixed clamps. Positioning pins of the positioning clamps pass through the positioning holes, and fixing screws of the fixed clamps pass through the fixing holes and are screwed with locking nuts. The floating clamps correspond to the clamping or loosening of the connecting parts, and the auxiliary clamps correspond to the supporting abutting parts. The machining method for C-shaped frame asymmetrical parts uses the above-described machining device. This invention, through the cooperation of the symmetrically arranged positioning structure and clamping system, can suppress machining deformation and improve versatility and machining efficiency.

This application relates to the field of intelligent manufacturing technology, and in particular to a method, system, and storage medium for controlling the deformation of aluminum frame processing based on data monitoring. The method includes: acquiring surface curvature and deformation data of the aluminum frame through sensors, generating a curvature distribution map and deformation vector field after image processing; analyzing the data based on a neural network model to identify stress distribution and potential defects, and determining speed adjustment requirements in conjunction with equipment delay information; if the requirements exceed a threshold, generating a dynamic speed curve and extracting key parameters to update equipment control; the system monitors the execution effect through feedback loops, and if the indicators do not meet the standards, it backtracks the data, optimizes model parameters, drives the equipment to complete processing through improved instructions, and collects subsequent data to evaluate the overall quality; this application improves the processing quality of aluminum frames.

This invention relates to a layered heterogeneous plate material produced by electric arc additive manufacturing and its preparation method. The invention employs a cold metal transition electric arc additive manufacturing method, comprising the following steps: (1) Material selection: selecting a substrate that does not undergo physicochemical reactions during the electric arc additive manufacturing process, wherein one substrate has high strength and low plasticity, and the other substrate has low strength and high plasticity; (2) Additive manufacturing: using cold metal transition electric arc additive manufacturing technology to add one substrate material, and after the addition is completed, adding another material to the already added area, repeating the above steps until the desired composite layered block is produced; (3) Post-processing: this invention combines processing deformation treatment and heat treatment on the basis of electric arc additive manufacturing to regulate the comprehensive mechanical properties of the layered heterogeneous plate material. The method for preparing layered heterogeneous plate materials using the cold metal transition electric arc additive manufacturing method provided by this invention can achieve efficient and stable deposition of dissimilar metal materials and interfacial metallurgical bonding.

This invention discloses a method for modeling the global static stiffness of a machine tool based on layer-by-layer decoupling of overall deformation. The method includes: decoupling the overall deformation of the machine tool layer by layer into tool chain deformation and workpiece chain deformation, and further decomposing these into deformations at several equivalent load points; constructing a surrogate model by performing finite element analysis on discrete experimental points and combining it with Kriging interpolation to establish a parametric compliance response surface model with the travel of each axis as input; synthesizing the compliance matrices of the drive system and the total compliance matrix of the motion system based on the actual series and parallel connections between components; and applying coordinate transformation matrices, force transformation matrices, and point transformation matrices to transfer and aggregate the deformations at each equivalent load point, ultimately synthesizing the overall compliance matrix of the entire machine tool, thereby constructing a global static stiffness space characterizing the tool tip relative to the workpiece. This invention features high computational efficiency and good model fidelity, and can analyze the static stiffness characteristics of a machine tool in any posture throughout the entire workspace.

The application discloses an aero-engine blade tenon and journal machining clamp and belongs to the technical field of aero-engine power machining. The clamp comprises a bottom plate, a mounting block, a limiting block and a reference conversion block. The mounting block is provided with a first V-shaped positioning block, a ball head positioning pin and a first blade body positioning block. The reference conversion block is provided with a sliding groove, a positioning groove and a jacking screw. The sliding groove is internally assembled with a second V-shaped positioning block. The positioning groove is internally provided with a second blade body positioning block. The clamp is also provided with a blade supporting mechanism. The original machining reference is converted to the reference conversion block through the cooperative positioning of multiple positioning components. The high-temperature pouring is not needed, the problem of coarse aluminum alloy blade crystals is avoided, the reference conversion precision and controllability are improved, the process is simplified, the efficiency is improved, the blade machining deformation is effectively inhibited, the clamp is suitable for tenon and journal thread mounting type blades, has high universality and guarantees the machining quality consistency.

The present application relates to a kind of medical austenitic stainless steel straight state wire and its heat treatment method.It solves the defects such as unreasonable design of prior art.The present heat treatment method includes the following steps:S1, drawing austenitic stainless steel straight state wire is pretreated;S2, austenitic stainless steel straight state wire after S1 processing is placed in atmosphere continuous furnace, and austenitic stainless steel straight state wire is gradiently heated and is treated by multi-stage heating;S3, austenitic stainless steel straight state wire after heating in S2 is transferred to isothermal zone and is treated by heat preservation, and austenitic stainless steel straight state wire after heat preservation in isothermal zone is treated by gradiently multi-stage cooling;S4, austenitic stainless steel straight state wire after cooling in S3 is treated by low-temperature stress relieving tempering, and after tempering, post-processing is carried out, and austenitic stainless steel straight state wire product is obtained.The present application has the advantages that internal stress is completely eliminated: segmented heating and low-temperature tempering synergistic effect, internal stress elimination rate reaches 90% or more, and subsequent processing deformation amount is ≤0.3mm / m.

The application discloses a structural part non-uniform allowance machining deformation control process optimization method and application thereof, and the method comprises the following steps: obtaining an initial geometric model of a structural part, material properties and clamping boundary conditions, establishing a to-be-optimized allowance design domain and discretizing the to-be-optimized allowance design domain into material layers along a machining depth, and defining the reserved / removal state of each layer as a design variable; a machining deformation evaluation model considering the structural stiffness evolution in the material removal process is established, a target function and a constraint condition are constructed with the minimum machining deformation as the target, the sensitivity of the design variable is calculated by using the adjoint variable method and is subjected to spatial filtering, the design variable is updated relying on a bidirectional progressive optimization strategy, and the final non-uniform allowance scheme is obtained after iterative convergence. The allowance distribution problem is converted into a material distribution optimization problem, the machining deformation sensitive area can be effectively identified, the allowance is differentiated and distributed, the deformation control effect and the engineering manufacturability are considered, and the method is suitable for the finishing process of aerospace, die forgings and thin-walled precision structural parts.

A synchronous flexible clamping scroll compressor cross-ring fixture belongs to the field of machining technology. This invention solves the problems of uneven workpiece force and workpiece deformation caused by existing hydraulic clamps. The reference ring is fixedly connected to the reference plate, and the cross-ring is mounted on the reference ring. A first bushing and a second bushing are mounted on the reference plate. The first guide pin and the second guide pin are slidably connected to their respective bushings. The other ends of the first guide pin and the second guide pin are threaded to the pressure plate. The pressure plate and the reference plate are connected by a drive bolt, and a return spring is sleeved around the periphery of the drive bolt. This invention employs a linkage structure that synchronously controls the movement of the pressure plate using the drive bolt, ensuring that multiple stop bolts on the pressure plate can evenly contact and clamp the workpiece, resulting in uniform force on the workpiece. This greatly avoids local deformation caused by uneven clamping and ensures the shape accuracy and surface quality of the workpiece during machining.

This invention relates to the field of forging processing, specifically a method for reducing machining stress in the internal hole machining of ultra-long and ultra-large cross-section Cr-Ni-Mo alloy steel shaft forgings. The internal hole machining process of the shaft forging is performed in the following steps: after heat treatment, the shaft forging undergoes hot straightening, a first stress-relief tempering, nesting the internal hole, a second stress-relief tempering, rough boring of the internal hole, a third stress-relief tempering, semi-finish boring of the internal hole, vibration aging, artificial aging, and finish boring of the internal hole to the final machined diameter. This invention addresses the machining requirements of the stern shaft of ultra-large ships, effectively reducing machining deformation caused by machining stress and ensuring the high precision requirements of the shaft forging.