36results about How to "Reduce plastic deformation resistance" patented technology

The invention provides a micro heat pipe electric-current-assisted rotary draw bending forming device and method, and belongs to the technical field of bent pipe manufacture plastic micro forming. Themicro heat pipe electric-current-assisted rotary draw bending forming device comprises a rotary draw bending forming machine, a mold assembly and a forming assisting power system. The mold assembly is installed on the rotary draw bending forming machine. The rotary draw bending forming machine is mainly composed of a fixed bottom plate, a pipe pressing assembly, a pipe bending assembly, a rotating shaft, a rotation drive mechanism and a control system. The rotating shaft is installed on the pipe bending assembly and is matched with a shaft hole in the fixed bottom plate. The pipe pressing assembly is fixed to the fixed bottom plate. The forming method includes the steps that firstly, the mold assembly is selected; secondly, a power-on loop is established; thirdly, parameters are set; fourthly, micro heat pipe blank heating and bending forming are conducted; fifthly, a bent piece is obtained through bending forming; and sixthly, the bent piece is taken out. By means of the micro heat pipe electric-current-assisted rotary draw bending forming device and method, micro heat pipe bending forming defects and forming precision can be controlled, and the problem that the heat conduction capacity is lowered after micro heat pipe bending is solved.

The invention discloses a gradient induction heating based thermal deformation workpiece blank heating method and a processing method and belongs to the field of meal thermoplastic forming. Accordingto the gradient induction heating based thermal deformation workpiece blank heating method and the processing method, a blank is designed according to the shape of a workpiece; parts, with different deformations, of the blank are subjected to rapid induction heating to different temperatures through a gradient induction heating coil, the temperature difference of different deformation parts of theblank is realized, and the continuity of the temperature of the surface of the blank is ensured. The plastic deformation resistance of areas hard to deformable is effectively reduced. The equipment tonnage can also be effectively reduced. Meanwhile, under the coupling effect of the temperature and deformation of the parts with the different deformations, the uniformity of the microstructure of awhole forged piece can be ensured, and the mechanical performance of a material is remarkably improved. Besides, the labor environment can be remarkably improved, the forged piece with the high dimensional precision, the uniform microstructure and excellent comprehensive performance is integrally formed, and automated and standardized production is achieved.

An electro-plastic open die forging device comprises an electric brush device, a driving device and a control device, wherein the electric brush device is connected with a pulse power supply, and the control device is capable of controlling the driving device to drive the electric brush device to be contacted with or separated from blank. The control device controls the time of the electric brush device for being contacted with or separated from the blank based on the position of an upper chopping board. Therefore, when the blank is forged, under the control of the control device, the driving device drives the electric brush device to be contacted with the blank, and transverse continuous electric pulses are led to the blank. The invention further provides an electro-plastic open die forging method. The device and the method improve forming property by utilizing electro-plastic effect of metal during an open die forging process.

A solid particle thermal expansion vibration composite forming process of a car rear axle housing includes: shrinking diameter to obtain a reducing pipe blank, heating, assembling a primary-bulging die, performing primary bulging to obtain a primary-bulging pipe blank, heating again, assembling a secondary-bulging die, performing secondary bulging to obtain a secondary-bulging pipe blank, heating for the third time, assembling a pressing die, and pressing to obtain the car rear axle housing. The process has the advantages that the problem of equipment seal in transitional car rear axle housing hydraulic bulging is solved; formability of the car rear axle housing is increased evidently, die assembly force is reduced during forming, and the thinning ratio even crack probability of the formed car rear axle housing are reduced; vibration plastic forming is used, so that pipe blank plastic deformation resistance can be lowered, machining quality of the car rear axle housing can be improved, and machining energy consumption of the car rear axle housing can be lowered; the relative motion conditions between the die and a workpiece is improved, and 'self-locking' among solid particles during car rear axle housing forming is avoided.

The invention relates to a micro-blanking forming device and a forming method, in particular to a high-frequency auxiliary micro-blanking forming device and a method for a foil plate. The device and the method aim at solving the problems in the existing high-precision blanking forming of the foil plate that an interval between a female die and a male die is small, a blanking force is significantly increased by a size effect, and the dies are badly worn and have short service lives. The device comprises a female die fixing plate, a lower bolster and a lower die plate that are sequentially connected from the top down, wherein an upper die plate and a male die fixing plate are sequentially arranged above the female die fixing plate; a female die is embedded into the middle part of the upper surface of the female die fixing plate; a vibration component and a punch are sequentially mounted in the male die fixing plate from the top down in an inserting manner; a middle line of the punch is coincided with that of the female die; the vibration component is connected with a high-frequency power source; a guide sleeve is mounted on the upper surface of the female die fixing plate in an inserting manner; the upper end of a guide column is mounted in the male die fixing plate in an inserting manner; and the lower end of the guide column is mounted in the guide sleeve in an inserting manner. The device and the method are used for blanking forming of the foil plate.

The invention provides an ultrasonic vibration-assisted metal micro die forming device which comprises a lower die holder, a female die, a female die base plate, a female die fixing plate, an ejector rod, an ejection screw, a piezoelectric element, a male die, a male die fixing block and a pressure sensor, wherein the female die fixing plate is fixedly arranged on the upper surface of the low die holder, both the female die base plate and the female die are embedded into the female die fixing plate, the female die is fixedly arranged at the top of the female die base plate, the ejection screw penetrates through the center of the lower die holder and extends into the female die base plate, the ejector rod is arranged at the bottom of the female die, the male die fixing block is arranged at the top of female die fixing plate, the male die is embedded into the bottom of the male die fixing block, the piezoelectric element is arranged at the top of the male die, and the pressure sensor is arranged at the top of the piezoelectric element. The ultrasonic vibration-assisted metal micro die forming device has the advantages that a required micro die casting part can be formed directly with an ultrasonic vibration-assisted metal micro die forming method, secondary processing is avoided, the processing efficiency is improved, and the cost is low.

The invention provides an atmospheric cold plasma jet auxiliary cutting method. Cold plasma jet generated under atmospheric pressure is used as a lubricating cooling medium during material cutting. Working gas enters a cold plasma jet generator from a working gas source via a pressure reducing valve and an adjustable flow meter, the flow of the working gas and output voltage of a high-voltage power source are adjusted so that uniform cold plasma jet is sprayed out from a nozzle outlet of the cold plasma jet generator, the temperature of the jet is the room temperature or is slightly higher than the room temperature, and a tool and workpiece interface and a tool and chip interface are always soak in the cold plasma jet during cutting by means of adjusting a spraying angle. Plasma can be generated in a dielectric barrier discharge mode, a suspension electrode discharge mode or a bare electrode discharge mode. The atmospheric cold plasma jet auxiliary cutting method is an environment-friendly cutting method, an excellent lubricating and cooling effects for various metal and nonmetal materials can be realized during cutting, accordingly, cutting force is reduced, the service life of a tool is prolonged, and the quality of the surface of a workpiece is enhanced.

The invention discloses a preparation method of a high-purity copper sputtering target, belonging to the technical field of sputtering targets. The method mainly comprises the following steps: carrying out upsetting and stretching plastic deformation on a high-purity copper target blank; cooling the target blank after multiple rounds of upsetting and stretching deformation; carrying out rolling deformation on the cooled high-purity copper target blank to prepare a high-purity copper target blank; and then carrying out thermal treatment on the target blank to obtain the high-purity copper target with fine and uniform tissues. The preparation method has the advantages that the high-purity copper target is prepared by adopting the method combining plastic deformation with thermal treatment; grains of the target prepared by the method are fine and are uniform in distribution, thus completely meeting the requirements of sputtering; meanwhile, the consistency and repeatability of the processing technology are ensured by adopting plastic processing equipment with controllability; the method is simple in process, flexible in equipment operation and high in production efficiency and is suitable for large-scale industrial production.

The invention discloses an auxiliary processing device for an electric pulse pipe fitting. The auxiliary processing device comprises a pulse power supply, a concave die, a core rod, insulating layers, a first positive electrode, a second positive electrode, a first negative electrode and a second negative electrode, wherein the first positive electrode and the second positive electrode are arranged on the inner surface of the concave die; the first negative electrode and the second negative electrode are arranged on the outer surface of the core rod; the first positive electrode, the second positive electrode, the first negative electrode and the second negative electrode are annular electrodes; the first positive electrode, the second positive electrode, the first negative electrode and the second negative electrode are connected with a pulse power supply; the insulating layers are uniformly distributed on the surfaces of the concave die and the core rod except the positive electrodes and the negative electrodes. According to the auxiliary processing device for the electric pulse pipe fitting, pulse current is introduced and an electro-plastic effect is used for enabling a raw material pipe fitting to be easily extruded and molded; the device disclosed by the invention is simple in structure, rapid in heating and high in working efficiency, and the cost loss and the energy source loss are reduced.