33 results about "Deformation Problem" patented technology

The invention relates to an injection molding machine self-adaptive machining control method and system based on material characteristics, and relates to the technical field of injection molding machining control. The method comprises the steps that material characteristic data and initial control parameters of injection molding materials produced by an injection molding machine are collected; according to the material characteristic data and the initial control parameters, injection molding machining flash prediction is conducted, and the flash size is obtained; adjusting step length according to the flash size configuration, optimizing the initial control parameters to obtain adjusted control parameters, predicting injection molding processing flash and injection molding short-shot deformation, and obtaining adjusted flash size and adjusted short-shot parameters; injection molding cost parameters and injection molding quality parameters are obtained through calculation according to the adjusted flash size and the adjusted short shot parameters, optimal control parameters are obtained through iterative optimization, and machining control is conducted. The method solves the problems that a traditional machining control method mostly depends on fixed parameter machining, material characteristic fluctuation is difficult to cope with, burrs formed when materials overflow from a mold and product deformation caused by short injection cannot be solved, and the product quality machining precision is insufficient.

The application relates to an injection molding machine adaptive processing control method and system based on material characteristics, and relates to the technical field of injection molding processing control, and comprises the following steps: collecting material characteristic data and initial control parameters of injection molding materials produced by an injection molding machine; performing injection molding processing flash prediction according to the material characteristic data and the initial control parameters to obtain a flash size; adjusting a step length according to the flash size, optimizing the initial control parameters to obtain adjusted control parameters, and predicting injection molding processing flash and injection molding short shot deformation to obtain an adjusted flash size and an adjusted short shot parameter; and calculating the injection molding cost parameter and the injection molding quality parameter according to the adjusted flash size and the adjusted short shot parameter, iteratively optimizing the optimal control parameter, and performing processing control. The application solves the problem that the traditional processing control method depends on fixed parameter processing, cannot cope with material characteristic fluctuation, cannot solve the product deformation problem caused by burrs and short shots formed by material overflow from a mold, and causes insufficient product quality and processing precision.

The present application relates to a kind of carbon fiber composite reflector mould surface new design method, belong to satellite antenna field;For the thermal deformation in the curing process of reflector, chemical shrinkage deformation and the deformation problem caused by mould, consider the thermal deformation influence of carbon fiber resin matrix composite material from rubber state to glass state whole cycle process, and according to the mould surface compensation of thermal deformation analysis result is carried out.Formation of reflector three-dimensional analysis model;The reflector is according to the rubber state and glass state of corresponding solidification process Double-state whole solidification cycle thermal deformation analysis is carried out, and three-point boundary constraint analysis method is proposed, and it is consistent with the working condition of reflector curing;In the solidification cycle of reflector, the interfacial stress of mould to reflector is extracted, and it is superimposed into reflector thermal deformation and is compensated jointly, through the thermal deformation joint compensation of reflector and mould, the mould surface design for high-precision composite material reflector manufacturing is realized, meet the need of high-precision antenna reflector to surface precision.

The utility model belongs to the field of titanium anode plate machining, particularly relates to a pneumatic bending machine for a titanium anode plate, and aims to solve the problems that an existing bending machine is prone to deviation in the machining process, the reject ratio of products is increased, materials are wasted, and deflection deformation is caused by deformation of a machine frame and a sliding part. Comprising a machine frame, a lower die, an upper die and a deflection correction mechanism, the deflection correction mechanism is arranged between sliding rails on the inner wall of the machine frame in a sliding mode and used for correcting deflection deformation, the deflection deformation can be effectively corrected, the overall length consistency of the bending angle of the titanium anode plate is guaranteed, and the machining precision and the product percent of pass are improved; accurate control and stable supporting are achieved, the production efficiency is improved, and the production cost is reduced; and through an intelligent control mechanism, the operation convenience and the equipment automation level are improved.

The utility model discloses a tool for forming a molded part with a notch, which belongs to the technical field of molded part processing and comprises an upper module, a lower module is arranged on the lower surface of the upper module, an upper bump is fixedly mounted on the inner wall of the top of the upper module, and a lower bump is fixedly mounted on the inner wall of the bottom of the lower module. The inner side faces of the upper die block and the lower die block are each provided with a notch cavity. According to the tool for forming the molded part with the notch, the elastic extrusion device is arranged, and during demolding, an extrusion spring can provide buffering force, so that the molded part is gradually separated from the notch of the tool, the problems of cracks and deformation at the notch caused by too large instant external force are solved, and the demolding yield of the molded part is greatly increased; due to the adjustability of the elastic extrusion device, the tool can adapt to production of notched molded parts with different size and shape requirements, the extrusion force can be changed by adjusting the compression degree of the extrusion spring, and machining of the molded parts with different materials and process requirements is met.

The application relates to the technical field of precision machining machine tools, and discloses a milling mechanism and method for a compound lathe, which comprises a milling execution module for milling a workpiece, a workpiece fixing module for clamping and driving the workpiece, an auxiliary supporting module, and a control module; the auxiliary supporting module is used for providing dynamic support for the workpiece during milling, and comprises a supporting assembly, a displacement driving unit, a detection unit, and a position calibration unit; the supporting assembly is used for being in contact with the surface of the workpiece; the displacement driving unit is connected with the supporting assembly and is used for driving the supporting assembly to move along the axial direction of the workpiece. According to the application, the auxiliary supporting module is arranged, the static deflection deformation problem of an elongated shaft caused by insufficient rigidity of the elongated shaft is solved, the module provides accurate radial supporting force by tracking a milling point in real time, the bending of the workpiece during machining is directly compensated, the straightness, cylindricity and other geometric tolerances of the workpiece are ensured, and the machining geometric precision is improved.

This application belongs to the field of cleaning robot technology, specifically relating to a non-deformable space installation structure using a jig. It includes a base shell and a collision drop bracket. The base shell has a movable groove for the collision drop bracket to connect and mate with. The movable groove allows the collision drop bracket to extend upwards in a first orientation and restricts its downward disengagement in a second orientation. This application achieves pressure-free assembly by designing the movable groove to only allow the collision drop bracket to extend upwards in the first orientation and restrict its downward disengagement in the second orientation. This fundamentally avoids the problem of plastic deformation caused by external force during installation, ensuring the buckle height and structural integrity. Simultaneously, this directional assembly method and the precise constraint of the movable groove allow the bracket to maintain a preset minimum movement gap within the groove for smooth forward and backward sliding, while effectively suppressing wobbling caused by excessive gaps.

The utility model discloses a saddle welding anti-deformation tool which comprises a saddle body, a first processing assembly is arranged at one end of the saddle body, second processing assemblies are arranged on the two sides of the first processing assembly, through the arrangement of the first processing assembly, the saddle body can be accurately positioned and rigidly fixed, and the saddle body can be firmly fixed. The problem of bottom plate deformation caused by thermal stress in the welding process is effectively restrained, the deformation risk caused by infirm fixation in a traditional spot welding process is avoided, then the second processing assembly is matched with the adjusting screw through the two-way screw, saddle bodies of different sizes can be flexibly matched, multi-direction fine adjustment is achieved, and the welding quality is improved. And the flatness and the assembly precision of the saddle before welding are ensured, and the flatness standard with high requirements is met, so that the procedures of manual shaping and grinding are reduced, the production period is remarkably shortened, the rework rate and material waste are reduced, and the overall production efficiency is improved.

To solve the technical problem that the existing mechanical auxiliary support cannot realize the elastic deformation control in the milling process of the thin-walled annular part, the present application provides a thin-walled annular part processing elastic deformation active control device and method. The present application builds a clamping module to realize the positioning and clamping of the thin-walled annular part; designs an active support module to apply controllable support force to the inner surface of the thin-walled annular part through multiple independent and support force controllable support devices, providing a basis for the active control of the elastic deformation in the milling process; and combines the deformation monitoring module and the regulation and control module to realize the active control of the elastic deformation in the processing of the thin-walled annular part for the first time, solving the elastic deformation problem caused by the introduction of the milling force in the processing of such thin-walled annular parts.

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.

The invention discloses a control method for improving the forming deformation of a plate-shaped sizing material, which comprises the following steps of: 1, performing shrinkage deformation simulation through mold flow analysis software based on product 3D (three-dimensional) data to obtain product deformation distribution data; 2, according to the product deformation distribution data obtained in the step 1, reverse pre-deformation compensation design is conducted on a mold cavity; 3, at least three glue inlets are formed in the top of the mold, the middle glue inlet corresponds to the middle section area of the top of the mold cavity, and the side glue inlets in the two sides correspond to the left section area and the right section area of the top of the mold cavity respectively; and 4, during injection molding, the opening and closing sequence of the pouring gate is controlled according to the following time sequence: in the first stage, the middle glue inlet is independently opened for glue injection, and the duration is T1; in the second stage, the side edge glue inlets in the two sides are opened, the side edge glue inlets and the middle glue inlet are made to conduct glue feeding synchronously so that residual glue injection can be completed jointly, and the synchronous glue feeding duration is T2; therefore, the deformation problem of the platy rubber material during injection molding is effectively improved.

The utility model discloses a kind of metal cabinet side panels with anti-deformation reinforcement belongs to metal cabinet side panel technical field, and its technical scheme main points include inner frame, concave frame and front frame, the front frame is located in the front side of inner frame, the concave frame is installed in the back of inner frame, the inside of the concave frame is fixedly connected with inner rib, the front side of the inner frame and the back of the front frame are all set with cooperation groove, filling capsule is clamped between two cooperation grooves, through multilayer structure design, solve the deformation and impact influence problem of existing metal cabinet side panel, it is filled with polyurethane foam by riveting structure and inner rib of inner frame and concave frame and enhances rigidity, deformation problem under long-term bearing and installation stress is responded, guarantee structure stability and aesthetic appearance;Utilize filling capsule and viscous oil between front frame and inner frame, provide elastic buffer for external collision, reduce the direct damage of impact to side panel and the influence to internal article, avoid article to dump.

The application provides a thin-wall special-shaped workpiece correcting device and a correcting method. The thin-wall special-shaped workpiece correcting device comprises a clamping plate correcting device. The clamping plate correcting device is composed of a first steel mold clamping plate and a second steel mold clamping plate. A heating correcting gap is formed between the first steel mold clamping plate and the second steel mold clamping plate. A clamping adjusting assembly is arranged between the first steel mold clamping plate and the second steel mold clamping plate. In the application, the internal stress of the thin-wall special-shaped workpiece is released through low-temperature heating, and the heating and fastening cycle mode is adopted to effectively solve the deformation problem. In addition, the correcting method in the application can make the thin-wall special-shaped workpiece reach the delivery standard, avoid post-deformation, and effectively improve the production quality.

The invention relates to the technical field of thin-wall part machining, and discloses an anti-deformation machining method for a special-shaped complex thin-wall workpiece. An ejection base is included, a special-shaped workpiece is welded to the bottom of the ejection base, a special-shaped mold is arranged in the special-shaped workpiece, and a positioning plate is detachably installed at the top of the special-shaped mold through a bolt; ejection screw holes are formed in the two sides of the surface of the positioning plate, a runner groove is formed in the outer wall of the special-shaped workpiece, and a pouring hole is formed in the inner bottom wall of the special-shaped mold. By designing the uniformly distributed ejection screw holes, the ejection screws are in threaded connection in the ejection screw holes, and the ejection screws are rotated to move downwards, so that the special-shaped mold and the special-shaped workpiece can be separated, uniform stress is ensured, and product deformation in the removal process is prevented. The problem of machining deformation of the 3mm-level ultrathin-wall special-shaped complex curved surface part is solved, the overall deformation of the casting is controlled within + / -0.3 mm, and the machining precision of the casting is ensured.

The present application relates to a kind of methods for preventing wing skeleton and skin from welding deformation, belong to welding technical field, solve the problem that existing laser welding technology is used for welding wing skeleton and skin when easily welding deformation.A kind of methods for preventing wing skeleton and skin from welding deformation, comprising the following steps: S1, design the tooling fixture for welding wing skeleton and wing skeleton and skin;S2, the parts of the wing skeleton to be welded are assembled on substrate;S3, after assembly, chord plane measurement is carried out;S4, using laser welding method, the joint of wing skeleton is welded;S5, the chord plane measurement of wing skeleton obtained by welding is carried out, and is corrected.The present application effectively controls and reduces the deformation problem of wing skeleton and skin in the process of laser welding by optimizing tooling fixture, assembly procedure, welding sequence, chord plane measurement and correction, and welding deformation can be controlled below ±0.5%.

This invention belongs to the field of lever machining technology, specifically relating to a machining method for a high-precision, weakly rigid lever assembly. The invention completes the machining of the weakly rigid lever assembly through six steps: heat treatment of the raw materials of the lever and shaft, preparation of a process table, individual machining of the lever and shaft, assembly of the lever and shaft, fine finishing of the reference surface, machining of the assembly, and removal of the process table. This invention not only significantly reduces the precision and difficulty of individual part machining and improves measurement accuracy, but also achieves economical machining precision, reducing machining costs. This invention effectively solves the deformation problem of parts during machining, ensuring stable machining quality and improving the pass rate and machining efficiency. This invention effectively solves the deformation problem of parts caused by poor rigidity or unbalanced force, meeting the requirements of geometric tolerances. This invention is applicable to the machining of other high-precision, weakly rigid assemblies and has a wide range of applications.

The invention relates to the technical field of precision machining machine tools, and discloses a milling mechanism and method for a composite lathe, and the milling mechanism comprises a milling execution module for milling a workpiece, a workpiece fixing module for clamping and driving the workpiece, an auxiliary supporting module and a control module; the auxiliary supporting module is used for providing dynamic supporting for a workpiece in the milling process and comprises a supporting assembly, a displacement driving unit, a detection unit and a position calibration unit. The supporting assembly is used for making contact with the workpiece surface. The displacement driving unit is connected with the supporting assembly and used for driving the supporting assembly to move in the axial direction of the workpiece. By arranging the auxiliary supporting module, aiming at the problem of static deflection deformation easily caused by insufficient rigidity of the slender shaft, the auxiliary supporting module directly compensates bending of a workpiece in the machining process by tracking a milling point in real time and providing accurate radial supporting force, the form and location tolerances such as straightness and cylindricity of the workpiece are ensured, and the machining precision of the slender shaft is improved. And the machining geometric accuracy is improved.

The utility model relates to the field of fasteners, and discloses a flat-head semi-hexagonal blind hole gluing pull rivet nut which comprises a nut body, a deformable part is arranged at the top end of the nut body, a nut head is arranged at the top end of the deformable part, a hexagonal hole is formed in the nut head, and the hexagonal hole is connected with the nut body. A progressive expansion groove is formed in the nut body, a wear-resistant coating is arranged in the progressive expansion groove, and a first positioning piece is fixedly connected to the outer portion of the joint of the deformable part and the nut body. According to the flat-head semi-hexagonal blind hole gluing pull rivet nut, the gluing quality can be improved and the gluing friction force can be enhanced through the gluing grooves and the anti-falling convex grooves which are evenly formed in the gluing part, when the nut body is installed, the deformable part deforms, the first positioning piece and the second positioning piece are both attached to a plate after deformation, and therefore the gluing quality is improved. The first positioning piece and the second positioning piece can enhance the stability of the joint, the structure achieves the function of being not prone to degumming and deformation, and the problem that degumming and deformation are prone to occurring is solved.

The invention provides a machining method of a high-hardness thin plate type dense hole system part, which comprises the following steps: S1, roughly machining a workpiece, reserving inner and outer circle margins and hole system margins, and releasing residual internal stress; s2, the hole system is subjected to semi-finish machining through low-speed wire cutting, the inner circle of the workpiece is trimmed and cut, all hole sites in the hole system are corrected to be within a preset precision range, and finish reaming allowance is reserved; s3, a tool is used for completely surrounding and fixing the workpiece, a reamer is used for conducting finish reaming machining on the hole system under the constant-temperature cooling condition, a recasting area and a heat affected area generated by low-speed wire cutting are removed, and the final hole diameter and position precision requirements are met; and S4, the tool is dismantled, and the high-hardness thin plate type dense-hole-series part is obtained. A combined machining mode is adopted, various deformation problems are effectively solved, a general technology for effectively controlling position precision is provided for high-hardness thin plate type dense hole series parts, and technical difficulties are overcome for enterprises.

This invention relates to the field of rolling bearing design and life assessment technology, specifically a method for calculating the life of an elliptical raceway bearing, comprising the following steps: S100, measured multi-point profile: obtaining a set of discrete points i of the measured profile of the raceway surface of the elliptical deformed raceway of the bearing to be assessed; S200, least squares fitting to an ideal ellipse: performing ellipse fitting on the discrete point set i to obtain an ideal ellipse, and determining the length of the major axis 2a and the length of the minor axis 2b of the ideal ellipse; S300, extraction of three points: extracting one endpoint A of the minor axis and two endpoints C1 and C2 of the major axis on the ideal ellipse; This transforms the complex geometric deformation problem into a change in the standard parameter of the bearing's internal clearance, thereby realizing the quantitative calculation of the life of the elliptical raceway bearing.

The utility model relates to the field of injection products, and discloses a product deformation correcting mechanism which comprises an operation table, a correcting assembly is installed on the front side of the top of the operation table and comprises two first sliding plates and two second return correcting blocks, and the bottoms of the first sliding plates are slidably connected to the top of the operation table; first return correction blocks are fixedly connected to the tops of the first sliding plates, second sliding plates are fixedly connected to the rear ends of the first return correction blocks, an alarm is fixedly connected to the inner sides of the first sliding plates, and the two second return correction blocks are fixedly connected to the left side and the right side of the top of the operation table respectively. The top of the workpiece is fixed to the position fixing block, the bottom of the workpiece is fixed to the second sliding plate, the second return correcting block is matched to drive the first sliding plate to move left and right, the first return correcting block drives the second sliding plate to move front and back, and then the position positioning block pushes the workpiece forwards to bend the workpiece, so that the workpiece is corrected, and product quality is prevented from being affected by deformation. And the problem of workpiece deformation which cannot be solved by the die is solved.

The application relates to the technical field of model airplane part machining, and discloses a chamfering device for nut machining of a model airplane engine, which comprises a transfer module, a groove is arranged at the bottom center position of the transfer module, placing grooves are arranged on the left and right sides in the groove, and two clamping grooves are arranged on the left side of the transfer module; a clamping mechanism comprises a plurality of limiting strips, a plurality of clamping columns are arranged in the limiting strips in a sliding mode, springs are arranged on the top ends of the clamping columns, and corresponding plates are arranged between the top ends of the springs. Through the adaptive clamping technical scheme that the clamping mechanism is in sliding cooperation with the transfer module and the clamping columns are sleeved with the springs, the technical effect that different size model airplane nuts can be stably clamped without damaging the nuts is achieved, the problems that the fixture needs to be disassembled, the tool angle needs to be adjusted and the operation is complicated during the model airplane nut replacement are solved, and the clamping deformation problem caused by the fixed fixture to the thin-wall characteristics of the model airplane nut is avoided.

The utility model provides a kind of to be suitable for ultra -thin titanium zinc plate anti -hoisting deformation clamp, it is related to hoisting clamp technical field, and it includes: at least two supporting clamping parts, each supporting clamping part includes support arm, clamping piece and movable support, the movable support is set on the support arm, multiple support arms are all rotationally connected in shaft core, to facilitate the relative position between multiple support arms, the clamping piece is set on the one end of the support arm away from the shaft core. The utility model has the beneficial effects: through the cooperation of clamp and movable support, effectively prevent the deformation problem of ultra -thin titanium zinc plate in hoisting process, ensure the integrity and installation accuracy of plate, the support arm of supporting clamping part can be rotationally connected in shaft core, it is convenient to flexibly adjust the support arm spacing according to plate size, improve the versatility and adaptability of clamp;Clamping piece uses U type frame and threaded rod structure, can firmly hold the edge of plate.

This utility model belongs to the field of mechanical manufacturing technology and relates to a rotor hole system anti-deformation machining device without correction. It includes a support base, the upper surface of which serves as the end face of the bottom of the supporting part and is fixedly installed with an angular contour pin; several elastic chucks that can deform are fixedly installed on the upper surface of the support base, the elastic chucks cooperate with the central inner hole of the part, the center of the support base is provided with an origin correction hole, and the front surface of the support base is provided with a horizontal reference correction band; this utility model can overcome the deformation problem caused by traditional clamping, provide a good cutting state for the tool during the machining process, and can accurately position the deflection angle of the rotor hole system, thereby improving machining efficiency while ensuring the accuracy requirements of the process dimensions of batch parts.

The application discloses a mold for profile adjustment, a profile adjustment method and a use method, and aims to solve the curing deformation problem commonly existing in the composite material forming process. Wherein, through the thinning of the mold plate and the design of the adjustable expansion rod and the free surface deformation technology of the space point cloud, a mold capable of adjusting the profile shape as required is obtained. Meanwhile, the mold plate and the partition plate are lifted, the air flow is reduced, and the temperature uniformity of the mold is improved. Through the simulation analysis technology, the curing deformation amount of the composite material component in the forming is predicted, according to the simulation result, the displacement amount of each expansion rod is calculated by using the reverse node adjustment method, the displacement of the expansion rod is adjusted until the curing deformation amount requirement is met, and the accurate adjustment of the profile is realized. The method can flexibly adjust the mold according to different shapes and sizes of the composite material component, and greatly improves the universality and adaptability of the mold.

The invention discloses a milling clamp for the end face of a bending and twisting supporting plate of a diffusion section assembly and a clamping method. The milling clamp comprises a bottom plate, a supporting block, a lower support, a lower compression screw, a lower cover plate, a positioning ring, an upper support, a pressing plate, a connecting plate, a fixed positioning pin, a locking nut, a central stand column, an upper lifting bolt, a base, a cover plate, a movable handle compression screw, a lower insert, an upper insert and an adjusting support. During milling and clamping, the upper side face, the lower side face and the bottom face of the bending and twisting supporting plate are supported in an auxiliary mode, the deformation problem of the inner ring and the bending and twisting supporting plate is avoided, the rigidity of the bending and twisting supporting plate is improved, and the problems that in a common clamping mode, part deformation is large, and vibration exists in the machining process are solved. The two positioning spigots are adopted for positioning the inner circle faces of the large outer diameter end and the small outer diameter end of the inner ring in the axial direction, milling machining is conducted on the end face of the bending and twisting supporting plate under the simulated assembling condition, the machined bending and twisting supporting plate can be smoothly assembled on the inner molded face of the outer ring, and the assembling clearance requirement is effectively met.

The utility model relates to the technical field of rubber mixing, in particular to an anti-deformation structure for a rubber mixing mill scraper device, which comprises a main scraper holder, a scraper device is arranged in the main scraper holder, an upper knife holder is fixedly mounted at the top end of the main scraper holder, and the scraper device comprises a plurality of groups of vertical knives distributed in the main scraper holder. Special gaskets are arranged at the tops of the vertical cutters, pressing plates are connected to the tops of the special gaskets, fixing screws are connected between the special gaskets and the pressing plates in a penetrating mode, and pull-up screws are fixedly connected between the pressing plates and the upper cutter frame. A pressing plate in the scraper device and the middle of an upper knife rest are pulled upwards through a pull-up screw to conduct deformation adjustment, the two sides are connected with a special gasket and the pressing plate through fixing screws to be fixedly supported, after the pressing plate is pulled upwards, a vertical knife can be suspended, the vertical knife is prevented from loosening through the special gasket between the pressing plate and the vertical knife, and weight is prevented from being accumulated on a main scraper rest; and the deformation problem of the main scraper frame is solved.

The invention relates to a titanium alloy component repair welding method based on a local tool, belongs to the technical field of titanium alloy welding process methods, and solves the problems of titanium alloy repair welding oxidation and deformation caused by incomplete protection and improper process in a traditional method. According to the method, a special local protection and anti-deformation tool is adopted, and the method comprises the core steps that firstly, an inner protection tool and an anti-deformation tool are assembled in a workpiece and abut against each other, and then an outer protection tool is installed; then, protective gas is introduced into the inner and outer protection tools to form a locally-closed gas cavity; performing repair welding under gas protection; continuously introducing gas after welding until a welding seam is cooled to a safe temperature; and finally, the tool is disassembled according to a specific sequence. Through the cooperation of the optimized technological process and the special tool, effective gas protection and rigid supporting in the whole repair welding process are ensured, and therefore the titanium alloy component is repaired in a high-quality mode.

The utility model discloses a kind of correct tool for solving thin-walled square shell casting deformation, it is related to casting deformation correction technical field. Including roof, roof bottom four sides are evenly installed and fixed with extrusion block, bottom plate is set below roof, bottom plate top four sides are evenly provided with correction block, extrusion block is set to extrusion bevel towards inner side surface, correction block upper portion is set to contact bevel towards outer side surface. The utility model will be installed to the correction tool on press machine, then the casting body to be corrected is placed into tool, press machine is down, so that the correction block on tool extrudes casting body, so that casting body reaches predetermined size, realizes full automation correction, it is convenient to cooperate with press machine accurate control stroke, so as to accurately control extrusion amount, so that the size of casting has consistency, eliminate artificial and other influence quality unstable factor, by this tool, efficiently, accurately correct this kind of square shell casting, solve casting deformation problem.

According to the technological method for controlling the size precision of the connecting rod large-head hole, the technological steps of annealing stress relief, large-head hole and small-head hole semi-fine boring for controlling the fine machining allowance, connecting rod disassembling and secondary assembling stress relief are introduced, and the initial stress generated by metal material cutting and large-head hole deformation caused by large fine boring allowance are effectively removed; by increasing the lower deviation of the pin hole I and the pin hole II, reducing the upper deviation of the positioning pin and increasing the fit clearance, the stress state of the connecting rod is improved, so that the deformation phenomenon caused by stress is reduced, and the problem of deformation after assembly caused by positioning fit interference and residual stress accumulation of a connecting rod big end hole in the prior art is solved; and the application range is wide, the operability is high, the interference problem of assembly pins is reduced, the connecting rod assembly is free of interference, the size precision of the large-head hole is stable, and the size precision requirement of the large-head hole machined by the connecting rod is met.