16 results about "Abrasive flow machining" patented technology

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

The invention relates to the technical field of abrasive flow machining equipment auxiliary devices, in particular to an abrasive flow equipment single-outlet-to-multi-outlet universal flow dividing tool which comprises a base, an adapter, a sealing plug and a hydraulic oil pipe. The foundation seat is a foundation of the whole tool structure, all the accessories are connected to the foundation seat, the outer side face of the foundation seat is provided with a plurality of sets of flow dividing holes in the radial direction and communicated with a plurality of flow channels, the adapters and internal threads of the flow dividing holes are installed in a matched mode, the two ends of the hydraulic oil pipe are provided with nuts, and the foundation seat and a matched tool are connected to convey abrasive particles. The flow dividing tool overcomes the defects that an existing flow dividing tool of abrasive flow equipment is poor in adaptability, uneven in flow dividing and unreliable in sealing, is used for the abrasive flow equipment, can achieve conversion from a single outlet to multiple outlets of the abrasive flow equipment, achieves flexible adaptation to parts of different sizes and different shapes, guarantees that the pressure and flow of abrasive media of all the outlets are uniform, and improves the flow dividing efficiency of the abrasive flow equipment. And meanwhile, the sealing performance in a high-pressure state is ensured, and the abrasive flow machining efficiency and machining quality are remarkably improved.

The invention discloses a method for processing a diamond material by abrasive flow, which comprises the following steps of: bombarding the surface of a diamond to form a surface graphite layer by using an elastic abrasive material wrapped with 45-85 percent by weight of diamond abrasive particles under the bombardment pressure of 0.1-0.8 MPa at the bombardment speed of 100-5000ml / min; and bombarding the surface graphite layer by adopting an elastic abrasive material wrapped with silicon carbide abrasive particles or diamond abrasive particles to obtain the processed diamond material. According to the method, the complex diamond surface can be efficiently machined.

The invention discloses a machining process of an EDU drilling and countersinking integrated cutter. The method comprises the following steps that S1, raw material preparation and nano coating treatment are conducted, specifically, ultra-fine grain WC-Co hard alloy powder and PCD composite sheet particles are selected as core raw materials, and a nano AlTiN coating is prepared on the surface of a PCD composite sheet through a vacuum arc ion plating technology; s2, integrally forming the cutter bar: mixing the raw materials subjected to the nano coating treatment in the step S1 according to a proportion, and putting the mixed raw materials into a vacuum hot pressing furnace for one-time hot pressing forming; s3, closed-loop machining of a tool bit functional structure is conducted, specifically, a five-axis linkage numerical control machining center is adopted, and a drilling edge is machined on the tool bar blank in combination with an ultrasonic-assisted cutting technology; s4, global precision calibration is carried out, wherein a high-precision main shaft runout instrument is adopted to detect the runout degree of the cutting edge of the tool bit and the runout degree of the handle part; and S5, surface treatment and final inspection are conducted, specifically, the cutting edge of the tool bit is subjected to passivation treatment through an abrasive flow machining technology, and the passivation value of the cutting edge reaches 0.005 mm. The EDU drilling and countersinking integrated cutter is resistant to abrasion and high in process machining precision.

The invention discloses a tubular diffuser closed flow channel machining control method, and relates to the technical field of diffuser machining control, the method comprises the following steps: S1, collecting machining state data in electrolytic machining, electric spark machining and abrasive flow machining procedures in real time, after the electrolytic machining procedure, a three-dimensional scanning system is adopted to obtain an actual allowance distribution digital map of the inter-blade channel; s2, inputting the actual margin distribution digital map into a pre-constructed process chain digital twinborn model, and predicting processing results under different parameter combinations through virtual simulation to obtain an optimized initial process parameter set; s3, according to the optimized initial process parameter set and the actual margin distribution digital map, margin uniformity analysis is carried out, and regional electric spark machining path planning is generated; and S4, according to discharge state data monitored in real time in the electric spark machining process, thickness distribution of the remelting layer is predicted, and technological parameters of abrasive flow machining are determined based on a prediction result.

The invention discloses a high-precision nondestructive testing method for the form of a micropore abrasive flow machining chamfer, and belongs to the technical field of precision machining. The method comprises the following steps: firstly, acquiring micropore characteristic parameters through image acquisition equipment, and inputting the micropore characteristic parameters into a mathematical model to obtain the minimum curvature radius of a chamfer; according to the method, a mathematical model is used for describing the micropore chamfer contour form, and the evolution law of main parameters in the micropore orifice form evolution process is provided. Meanwhile, the linear regression relation between the micropore orifice form and the chamfer minimum curvature radius is analyzed, a mathematical correlation model of the micropore orifice form and the chamfer is provided according to the regression analysis result, nondestructive testing and evaluation of the micropore chamfer minimum curvature radius can be achieved through the model, and the micropore chamfer detection process after abrasive flow machining is simplified.

The invention discloses a liquid metal abrasive particle flow machining device and method based on a Halbach magnetic field. The problem that in the prior art, the polishing uniformity of a complex curved surface is poor is solved. The machining device comprises a platform frame, a mounting plate is arranged on the platform frame, a visual machining module is arranged on the mounting plate, and the two ends of the visual machining module are in linkage with driving air cylinders through push rod assemblies. The visual machining module comprises a closed profiling constraint runner formed by transparent acrylic plates, a workpiece to be machined is fixed in the runner, and the two ends of the runner are connected with piston rods of the driving air cylinders through push rod assemblies. A Halbach permanent magnet array is arranged below the workpiece, and the Halbach permanent magnet array is formed by neodymium iron boron permanent magnets according to a Halbach polarity arrangement mode and used for generating a strong gradient directional magnetic field with one side enhanced and the back side weakened in a machining area.

The application discloses a kind of discharge driving abrasive flow processing microneedle die core dynamic and static process control method: S1 in the microneedle die core forming milling process, using PCD slope cutter, free abrasive liquid is added on workpiece, while programmable power supply anode is connected to microneedle die core, cathode is connected to milling cutter handle, and abrasive flow is formed in the gap between cutter and microneedle side face;Workpiece material is removed under the joint action of cutter and abrasive flow, and microneedle die core is formed;S2 effective pulse discharge energy is judged by discharge waveform, pulse discharge power is calculated and output to controller;S3 closed-loop feedback control is realized by controller during processing, and dynamic and static stability of control abrasive removal force in the gap between cutter and workpiece surface is realized.The application can effectively improve the machining precision of microneedle die core and reduce needle tip radius by controlling the processing of microneedle die core.

The invention relates to the technical field of millimeter wave communication, in particular to a V / W wave band low-loss metal waveguide and a preparation method thereof. According to the preparation method provided by the invention, metal additive manufacturing, inner wall conductive metal deposition, ultra-smooth inner surface polishing and external single-point diamond turning technologies are combined, so that the waveguide manufactured by a composite process chain is high in yield; comprising an aluminum-magnesium (zirconium) alloy waveguide structure manufactured through laser beam melting additive manufacturing, a copper (silver) inner wall coating deposited through a chemical reduction plating technology, an inner wall surface with the roughness lower than 50 nm Ra through abrasive flow machining, and a self-alignment flange with the flatness lower than 0.1 micron and the butt joint surface roughness lower than 20 nm Ra through ultra-precision machining. And the electrical performance, the thermal interface consistency and the assembly precision are improved. According to the preparation method, the problems of high price-mode coupling, uncontrollable inner wall roughness and the like caused by high insertion loss and large structure assembly error of the existing waveguide structure in high-frequency application are solved.

An additively-manufactured electrical transmission line is made as a single, unitary continuous monolithic additively-manufactured piece of material, including an outer housing defining a cavity therewithin, a conductive stripline passing through the cavity, and stubs within the cavity electrically coupling the outer housing to the stripline. The stripline may be a flat stripline. The stubs may be angled relative to the stripline, to facilitate surface treatment within the housing, such as abrasive flow machining to reduce surface roughness, which may be part of a method of making the electrical transmission line. The electrical transmission line may be part of an electrical installation including multiple such electrical transmission lines, which may have shapes, including curved shapes, for making desired electrical connections between components.

The utility model discloses a horizontal type tool for abrasive flow machining, which comprises a limiting component, a connecting component, a positioning component, a clamping component and a clamping component, and the limiting component comprises a fixed column, a guide column, a connecting shaft and a limiting plate; the fixing column is clamped in the supporting strip, the guide column is fixed to the upper surface of the fixing column, the connecting shaft is fixed in the top end of the guide column, and the limiting plate is rotationally connected to the outer surface of the connecting shaft. By means of the limiting assembly, when a workpiece needs to be placed, the workpiece is placed on the supporting strip at the corresponding position, the silica gel column is inserted into the supporting strip, the fixing column is clamped in the supporting strip, pulling force is applied to the guide plate, the limiting column is driven to be separated from the interior of the guide column, and under the action of the connecting shaft, the workpiece is placed on the supporting strip at the corresponding position. According to the scheme, the rotating force is applied to the limiting plate, the limiting plate is clamped in the other set of guide columns, the force applied to the guide plate is cancelled, and the limiting columns spring back to the interior of the limiting plate under the elastic force effect of the springs, according to the scheme, the workpiece is stably limited to the needed position, and the machining efficiency is improved.

The invention discloses an abrasive flow one-way machining polishing medium returning device which comprises a rack, one side of the top of the rack is connected with a thrust system through a supporting unit, the thrust system is connected with a hydraulic station through a pipeline, the outlet end of the thrust system is connected with a discharging pipe, the bottom of the rack is connected with a reverse thrust system, and the reverse thrust system is connected with the thrust system. The reverse thrust system is arranged under the discharging pipe. The invention further discloses a material returning method of the polishing medium material returning device for abrasive particle flow one-way machining. By means of the reverse thrust system and the thrust system, closed-loop circulation of extrusion, collection, backfilling and re-extrusion of the abrasive particles is constructed, medium recycling and backfilling can be completed without manual intervention, and the problems that in the prior art, operation is complex, consumed time is long, efficiency is low, maintenance is increased, and cost and potential safety risks are increased are solved. Continuous polishing operation is achieved, the manual operation time is greatly shortened, and the overall polishing efficiency and reliability are improved.

This invention discloses a machining method for removing remelted layers from complex surfaces using electrical discharge machining (EDM), comprising: detecting the geometric dimensions and surface roughness of the part after EDM to obtain first geometric dimension data and first roughness data; performing metallographic analysis on the part after EDM to detect the residual thickness of the remelted layer and obtain first remelted layer thickness data; assembling the part after EDM into an abrasive flow tooling that matches the part after EDM; performing abrasive flow machining on the part after EDM using an abrasive flow device under set abrasive and machining parameters to remove the remelted layer; cleaning the residual abrasive on the part and cleaning the part; detecting the geometric dimensions and surface roughness of the part after abrasive flow machining to obtain second geometric dimension data and second roughness data; performing metallographic analysis on the part after abrasive flow machining to detect the residual thickness of the remelted layer and obtain second remelted layer thickness data; and comparing and analyzing the remelted layer removal effect based on the first remelted layer thickness data and the second remelted layer thickness data. The purpose of this invention is to solve the problems of inconsistent remelted layer residue on the surface of parts caused by manual clamping, the risk of dimensional deviation, and inconsistent visual inspection results, and to avoid fatigue failure caused by intergranular corrosion on the surface of electrical discharge machining surfaces under high temperature and high centrifugal load conditions.

The application discloses a cooling device for an abrasive cylinder of an abrasive flow processing machine tool, which is characterized by comprising a heat dissipation water tank and a temperature control device. The heat dissipation water tank is similar in structure to a hollow sleeve and is tightly attached to the outer wall of the lower abrasive cylinder, and a cooling liquid is circulated in the flow channel. When the abrasive cylinder is working, the cooling liquid continuously flows. When the temperature is too high, the cooling system starts to work, and the heat is taken away through the circulation of the cooling liquid, so that the temperature of the abrasive in the abrasive cylinder is controlled, thereby solving the problem that the abrasive temperature cannot be effectively reduced during the traditional abrasive flow machine tool processing. In addition, a cooling pipeline is arranged above the lower abrasive cylinder and is integrated with the cooling water tank. The cooling pipeline is in the shape of a cross, a Y shape or a straight line, is grooved and is provided with the cooling liquid. When the machine tool is working, the abrasive directly contacts the cooling pipeline, and the heat exchange is further enhanced, so that the purpose of controlling the abrasive temperature is achieved. The application can effectively reduce the temperature in the abrasive cylinder and ensure the processing performance of the abrasive, and has a significant influence on the processing effect of the machine tool.

The invention is applicable to the technical field of abrasive flow machining, and provides a multi-outlet adjustable abrasive flow tool for 3D printing valve runner polishing, which comprises a base, a storage bin, a feeding pipe, a feeding motor, a tool plug, a valve, a tool plug, a tool pressing plate, a tool pressing plate shaft, a tool pressing plate gear, a gear motor, an abrasive recovery tank, a recovery pipe and a recovery motor. The storage bin is fixed to the base, one end of the feeding pipe is connected with the storage bin, the other end of the feeding pipe is provided with a plurality of outlets, and the outlets are connected with the valve body abrasive inlets through tool plugs. A feeding motor drives grinding materials to flow, a tool plug blocks an outlet of a non-machining runner of a valve body, a tool pressing plate is installed in a cavity of the valve body and fixed to a tool pressing plate shaft, the tool pressing plate shaft is connected with a tool pressing plate gear, and a gear motor drives the gear to operate so as to adjust the pressing plate. The problems that abrasive particles are not evenly distributed in a complex runner, and machining dead angles exist can be solved, the quality of the inner wall of the valve body and the machining efficiency are improved, the sealing performance and the adaptability are good, and the tool assembling and disassembling steps are reduced.