63results about How to "Inhibition of rebound" patented technology

This invention relates to a fabricating method for anisotropically bonded magnet including: step S1 for adjusting the first mixture and the second mixture, where: the first mixture comprises the first magnetic powder, of which the grain size is in the range of 20-150mum, thermosetting resin of 2.0 wt%being added into the anisotropically bonded magnet, the first additive; the second mixture comprises the second magnetic powder, of which the grain size is in the range of 1-20mum, the second additive; step S2 for adjusting the first mixture and the second mixture; step S3 for making the magnetic intensity of the end part of the shaping metal die be under the 0.8T, the magnetic intensity of the central part of the shaping metal die is 5% higher than that of the said end part of the shaping metal die after said mixed compounds being filled into the metal die; step S4 for heating said mixed compounds at the atmosphere of inert gases or nitrogen gases so as to harden compounds.

The invention discloses a pressure control method for forming an aluminum alloy covering part viscoelastic-plastic soft mode, relating to the pressure control method for forming an aluminum alloy covering part soft mode. The invention solves the problems of local tinning and cracking, larger rebound, bad surface quality and higher manufacture cost which are existed in the prior aluminum alloy covering part. The invention substantially comprises the following steps of: shaping a mould; installing a piston and an overflow valve; filling viscoelastic-plastic materials; matching a mould; adjusting the overflow valve to control the pressure value of the deformed region of the aluminum alloy plate blank material; tightly gluing the aluminum alloy plate blank material with the die cavity of a cavity die under the thrusting function of the viscoelastic-plastic materials to form the needed aluminum alloy covering part; opening the mould; taking out the formed aluminum alloy covering part; and removing the viscoelastic-plastic materials remained on the surface of the aluminum alloy covering part. The invention inhibits the rebound of the formed aluminum alloy covering part, prevents the local region from being cracked, improves the surface quality of the aluminum alloy covering part, and reduces the manufacture cost of the aluminum alloy covering part.

The invention relates to a large-deformation rolling technology based on asymmetric rolling equipment. According to the large-deformation rolling technology based on the asymmetric rolling equipment,a detachable bottom plate is replaced with a shaping demand bottom plate, a hydraulic adjustment device is adopted to adjust spacing between a roller and the bottom plate, the rolling temperature is adjusted through a roller heating plate and a bottom plate heating device, before rolling, a sample is placed into a sample heating device to be preheated to reach a preset deformation temperature, thesample is pushed into a feeding opening, a transmission unit is driven by a three-phase motor to make the roller rotate, and a gear-rack transmission device makes the roller and the bottom plate linked to complete rolling. By the adoption of the large-deformation rolling technology based on the asymmetric rolling equipment, after rolling, recrystallization and annealing treatment are combined tocarry out synergistic regulation to obtain fine-grain superplastic structure, multi-grade structure structure in which large and small crystal particles are mixed can also be obtained, and the strength and the plasticity are greatly improved at the same time; the grain size of plates is reduced, the texture of rolled plates is weakened, the performance of the rolled plates is improved, through cooperation of the roller and the work bottom plate, different kinds of plates can be prepared, technological processes are reduced, the machining cost is reduced, and the production efficiency is improved.

Provided is a heat transfer tube for a heat exchanger or the like, which can acquire a predetermined heat transfer performance without increasing any internal pressure loss. The heat transfer tube comprises higher crests (22A) and lower crests (22B) helically with respect to a tubular axis direction. The higher crests (22A) are formed of ten to twenty ridges to have a predetermined height, and the lower crests (22B) are formed of two to six ridges between the higher crests (22A) to have a lower height than that of the higher crests (22A).

An aluminum/nickel clad material (1) which comprises an aluminum layer (3) formed with pure aluminum and a nickel layer (2) formed with pure nickel being joined with each other by diffusion joining, wherein the nickel layer (2) has a hardness of Hv = 130 to 170; and the aluminum/nickel clad material (1), wherein the aluminum layer (3) and the nickel layer (2) are joined by diffusion joining via an Al - Ni based intermetallic compound layer having a thickness of 0.4 to 10.0 mum, preferably 1.0 to 6.0 mum. The latter clad material exhibits excellent peel strength. The aluminum/nickel clad material exhibits stable welding joinability towards an aluminum material even when ultrasonic welding is applied to it and is less prone to occurrence of failures in shape even when it is subjected to bending working, and thus is suitably used as a material for an exterior terminal for an electric cell.

The invention provides a device for storing a yacht. The device comprises two oppositely-arranged supporting frames, at least two pairs of wheels connected to the bottoms of the two supporting framescorrespondingly, and at least four lifting devices; the two supporting frames are connected through a plurality of first connecting pieces which can conduct extendable movement in the connecting direction, and a mounting position used for storing the yacht is formed between the two supporting frames; and all the first connecting pieces are arranged in parallel, and the wheels are connected to thebottoms of the supporting frames through the lifting devices. The device for storing the yacht and the using method of the device can be applied to storing and carrying of the various sizes of yachts,operation process is simple, the parking efficiency of the yacht is improved, safety and reliability are high, the structure of the whole device is simple, and using is convenient.

In order to prevent the bounce of a brake shoe during the initial braking, produce the braking force stably, and stop at the predetermined speed, the invention provides an elevator provided with an emergency braking device. In order to stop the cabin of the elevator, the brake shoe is slidably disposed on a guide rail in an elevating channel in a pressed manner by using the emergency brake device, and therefore the brake force can be generated. The elevator provided with the emergency brake device is further provided with a collision force direction converting part, which can be used to convert the collision force generated by the collision between the brake shoe being lifted upward and a top plate of the emergency braking device into the movement resistance in the horizontal direction. The collision force direction converting part is constituted by a pin used as a protruding member and a gap filling sheet used as a concave member. The pin is disposed on an upper part of the brake shoe, and the gap filling sheet is disposed on the top plate of the emergency braking device by the housing part in a supported manner, and can be embedded with the pin. The movement of the gap filling sheet in the horizontal direction can be used to prevent the bounce of the brake shoe.

The invention discloses a numerical-control flexible roll bending machine for three-dimensional variable-curvature sheet metal parts. The numerical-control flexible roll bending machine comprises a base, a left machine frame, a right machine frame, a turnover device, a rigid roller, a flexible roller coated with polyurethane rubber, two side rollers, an upper roller supporting device, a side roller supporting device, a driving device, a lifting device and a dedicated numerical control system. The rigid roller, the flexible roller and the two side rollers are installed on the left machine frameand the right machine frame. According to the numerical-control flexible roll bending machine, the flexible roller is located under the rigid roller and connected with the lifting device, a rigid upper roller is connected with the driving device, the lifting device drives the flexible roller to ascend and descend, the driving device drives the rigid upper roller to rotate, the upper roller supporting device and the lower roller supporting device conduct reverse supporting on the rigid upper roller and two lower rollers, and the phenomenon that in the plate rolling process, all rollers are subjected to flexural deflection due to reactive force is eliminated; and by controlling the depth, pressed into the flexible roller, of the rigid upper roller and the feeding positions of the two side rollers, the parts subjected to double variable curvature roll bending are obtained.

The invention relates to a horizontal springback inhibition device applied to the waveform piece forming process. The horizontal springback inhibition device applied to the waveform piece forming process comprises a springback inhibition auxiliary device, a rail conveying device, a core stamping device and an upper computer. After a conventional stamping process is finished, a horizontal springback inhibition step is added, a first power mechanism drives a screw rod to rotate, and the screw rod rotates to drive a sliding seat to slide, so that a first positioning pin is driven to draw close toa second positioning pin; under the control of the upper computer and a ranging module, the feeding amount is accurately controlled; the first positioning pin and the second positioning pin apply pressure on two assembling holes of a sub slice of a formed waveform piece so as to drive the two assembling holes on the waveform piece to get close; and a squeezing board module is matched for extruding the sub slice of the waveform piece for the second time, so that the aim of inhibiting the springback of the waveform piece is finally realized.

The invention provides a porosity testing tool and a testing method thereof. The porosity testing tool comprises a liquid nitrogen cold quenching part, a pressurizing part and a porosity testing part. A cavity is formed in the liquid nitrogen cold quenching part and used for storing liquid nitrogen and storing a to-be-tested sample, and the to-be-tested sample comprises an electrode plate and/or a battery diaphragm; the pressurizing part is used for applying pressure to the to-be-tested sample; and the porosity testing part is used for testing pores in the to-be-tested sample which is subjected to liquid nitrogen cold quenching. The cold quenching treatment on the to-be-tested sample (the electrode plate and/or the battery diaphragm) can inhibit the to-be-tested sample from springback due to pressure relief after pressure is applied to the to-be-tested sample. On one hand, the real state of the to-be-tested sample can be kept, and the morphological change of the to-be-tested sample in a pressure state can be truly reflected; on the other hand, the adverse effect of springback of the to-be-tested sample after pressure relief on the porosity testing result can be inhibited, the error of the porosity testing result can be reduced, and the porosity testing accuracy is improved.

The invention discloses a heat exchanger. Disclosed is a radiator (10) as the heat exchanger, comprised of an upper tank (11) to which cooling water is introduced; a core (12) in which fluid from the upper tank (11) is heat-exchanged; and a lower tank (13) in which fluid from the core (12) is concentrated, wherein a baffle plate (40) is provided within the upper tank (11); and a bent portion (45)is provided at an end of the baffle plate (40) in the longitudinal direction. The baffle plate (40) divides the inner space of the upper tank (11) into two spaces, i.e., a lower space (41) and an upper space (42), and has a communication opening (43) through which the lower space (41) is communicated with the upper space (42). The bent portion (45) is bent toward the lower space (41)at the two end parts of the length direction of the baffle plate (40).

Provided is a press molding technology capable of reducing molding defects in molded components having a hat-shaped cross section having a shape bent so as to curve outwards on a flange section side,in the side view. This production method has a first molding step (9A) in which a metal plate (10) is press-molded on to an intermediate molded article (40) and a second molding step (9B) in which theintermediate molded article (40) is bent, said intermediate molded article (40) having a wave shape that: has undulations that continue in the longitudinal direction thereof, at a vertical wall-forming position (13) and a flange section-forming position (14); and has an increasing amplitude in the plate thickness direction of the undulating shape, increasing towards to a position corresponding tothe boundary between the vertical wall section (3) and the flange section (4). The length of the longitudinal direction at a position corresponding to the boundary between the vertical wall section (3) and the flange section (4) in the intermediate molded article (40) is equal to or close to the length of the longitudinal direction of the boundary between the vertical wall section (3) and the flange section (4) in the press-molded shape (1).