450results about How to "Guaranteed deformation" patented technology

The present invention relates to a superplastic forming method for the titanium plate specially used for the plate type heat exchanger, which belongs to the field of mechanical processing technology. The present invention comprises the following steps that spongy titanium is chosen to be the melted raw material; the spongy titanium is placed in a vacuum plasma smelting furnace to be directly cast into plate base; the plate base forms a plate of a thickness of 2.0 to 2.4 mm after the process of heating, hot rolling, acid and alkali washing; second heating, hot rolling and acid and alkali washing and annealing; the plate of a thickness of 2.0 to 2.4 mm after the annealing in the vacuum smelting furnace forms a titanium plate of a thickness of 0.5 to 0.6 mm after the process of cold rolling, cleaning, second annealing and cold rolling, acid and alkali washing and third annealing. The present invention adopts the process that the spongy titanium which contains oxygen, iron and nitrogen of comparatively high content is directly processed into the titanium plate base in the plasma smelting furnace and directly rolled into the plate without forging and pressing.

The invention relates to a plate multipoint progressive forming device which comprises a mould stand, a plurality of driving pressurization units and a plurality of shape adjusting and supporting units, wherein the driving pressurization units are mounted on a top plate of the mould stand; each driving pressurization unit consists of an upper pressing head, a driving basic body, a spring, a piston and a driving hydraulic cylinder; the upper pressing heads are movably mounted at the bottom ends of the driving basic bodies; the driving hydraulic cylinders are fixed to the top plate of the mould stand; the shape adjusting and supporting units are mounted on a bottom plate of the mould stand; each shape adjusting and supporting unit consists of a lower pressing head, a supporting basic body, a spring, an adjusting bolt and a supporting hydraulic cylinder; the lower pressing heads are movably mounted at the top ends of the adjusting bolts; the supporting hydraulic cylinders are fixed to the bottom plate of the mould stand; and under the action of the driving hydraulic cylinders and the supporting hydraulic cylinders, multipoint progressive forming of a plate between the upper pressing heads and the lower pressing heads is realized. The plate multipoint progressive forming device is reasonable in structure; by controlling the pressure difference between the two sides of the plate, the optimal forming effect is realized; the forming precision of the plate is high; and the surface quality of the plate is good.

The invention discloses a machining process of middle-long thin-wall blades, which belongs to the technical field of machining of blades. The machining process is implemented by a detailed process of integrated rough machining and integrated fine machining, wherein the integrated rough machining comprise the specific steps of rough machining of each surface of a blade tip, each surface of a blade root and a molded surface of a steam passage; and the integrated fine machining comprises the specific steps: semifinishing of each surface of the blade tip and each surface of the blade root, fine machining of each surface of the blade tip, each surface of the blade root and each residue, semifinishing of the steam passage and fine machining of the steam passage. According to the machining process of the middle-long thin-wall blades, the operation is simple and convenient, the use is convenient and fast, the cost is low, the machining efficiency is high, and the operation is easy and labor-saving; and the deformation of the middle-long thin-wall blades is controlled within 0 to 0.8mm, the normal machining of a subsequent mold correction process is facilitated, and the machining of each blade is finished once.

The invention discloses a method for machining inner gear rings. The method includes steps of forging, normalizing, rough lathing, finish lathing, gear shaping, carburizing, pressure quenching and shot blasting. By the aid of the method, surface hardness, core structure and depth of a hardened layer of a gear ring are improved, machining cost is lowered, deformation of the gear ring is avoided assuredly, accordingly, the service life of the gear ring is prolonged, and the load capacity of a vehicle is enhanced.

The invention relates to a three-dimensional printer, a three-dimensional printing head and a printing method. The three-dimensional printing head comprises a material volume cavity, wherein a screw rod is arranged in the material volume cavity, a motor is connected with the screw rod, a material supply device is communicated with the material volume cavity, a printing nozzle is arranged on the end part of the material volume cavity, a heater is arranged on the material volume cavity and positioned between the material supply device and the printing nozzle, and a supercritical fluid supply system is communicated with the material volume cavity. A molten printing material is mixed with supercritical fluid to generate a single-phase molten mixture under the mixing and stirring effect of the screw rod, and a uniform microporous bubble formation effect is formed, so that the density value of a printing object can be reduced, the size deviation of the three-dimensional printing object can be alleviated, the flatness and straightness of the three-dimensional printing object can be improved by more than 50 percent, the temperature for printing the molten printing material is effectively lowered, the energy is saved, and the operation personnel is prevented from being scalded.

The invention provides a method for preparing a multilayer low-temperature cofired ceramics integrated liquid cooling circulation channel. By the adoption of the method, the fact that the liquid cooling circulation channel does not collapse can be guaranteed, and the problems of layering and swelling in the sintering process can be solved. According to the technical scheme, the method is achieved through the following steps that firstly, a plurality of low-temperature cofired raw ceramic chips are divided into three layers, locating holes, via holes, heat radiating holes and the liquid cooling circulation channel are prepared respectively, then, integral lamination is conducted on the top raw ceramic chip layer with an antenna unit to form a top unit, and integral lamination is conducted on the middle raw ceramic chip layer with the liquid cooling circulation channel and the bottom raw ceramic chip layer with a TR component unit to form a pit unit; volatilizable filling materials are printed into pits of the pit unit, organic adhesive coats the surface of the pit unit, the top unit is stacked on the pit unit, and an integral module is formed in a low-temperature and low-pressure mode; the integral module which is laminated is placed in a sintering furnace for sintering, and a liquid cooling external joint is welded to a corresponding liquid cooling inlet and outlet on the surface of the top layer of the module.

The invention relates to a vibratory stress relief apparatus for medium frequency and low frequency shaft type parts, and a use method thereof. The apparatus comprises a vibration exciter, a support block for clamping and supporting a workpiece, and a support mechanism connected with the support block. The support mechanism comprises a pair of support frames comprising a left support frame and a right support frame, and a support seat for installing the left support frame and the right support frame, wherein the left support frame and the right support frame right are arranged relatively. Thesupport block respectively forms rotatable connections with the left support frame of the support mechanism and the right support frame of the support mechanism. The apparatus further comprises a vibration exciter base for installing the vibration exciter, wherein the vibration exciter base is arranged on the middle portion of the workpiece, the vibration exciter, the vibration exciter base and the workpiece synchronously vibrate during vibratory stress relief. According to the present invention, a simply supported beam form is adopted, the flexural vibration type primary resonance is generated by the shaft type parts under the excitation of the vibration exciter at the natural frequency adopted for shaft flexural vibration; in the prior art, the dynamic stress generated by the apparatus does not reach the requirement of residual stress decreasing, with the apparatus provided by the present invention, the problem in the prior art is solved; the deformation amounts on both ends of the shaft are substantially improved; the dynamic stress distribution of the shaft is uniform so as to effectively reduce the residual stress of the shaft part.

The invention discloses a self-adaptive control method for large-curved-surface grinding. The method adapts to workpieces with different curvatures through adjusting positions of three support points from the center, shortens the contact force adjusting time through roughly adjusting the thread pre-tightening force to improve the efficiency, acquires the contact force in the grinding process through a stated sampling period to feed back force signals, sets a contact force threshold to calculate a mean value of contact force values acquired by continuous 5 times of sampling periods, and uses a set controller for generating driving signals to continuously adjust the torque direction and magnitude of a drive in a polishing tool module to change the deformation of an elastic part, so that the magnitude of the contact force is proper, a proper numerical value range is kept, and the relatively stable polishing contact force is realized. The method comprises five steps of: (1) grinding preparation; (2) workpiece touching; (3) trajectory planning; and (4) grinding; and the method can realize relatively constant polishing contact force, and improves the machining stability.

The invention relates to a minicar impact-proof beam energy absorption box capable of controlling impact energy absorption and residual deformation, which is used for solving the problem of the energy absorption of a front impact-proof beam and comprises a transverse beam and energy absorption boxes symmetrically arranged on both sides of the transverse beam, wherein the improved energy absorption boxes are provided with bulged and concave guide tendons regularly distributed; the bulged guide tendons and the concave guide tendons are alternately arranged on the side walls of the energy absorption boxes; the positions of the bulged and the concave guide tendons on the two relative side walls of the energy absorption boxes are corresponding; and the positions of the bulged and the concave guide tendons on the two adjacent side walls of the energy absorption boxes are corresponding. The invention has the advantages that the guide tendons regularly distributed are successively squashed and absorb energy when the front impact-proof beam of an automobile is impacted through the optimization design of the guide tendons arranged on the energy absorption boxes, and the front impact-proof beam presents an S-shaped squashing type when deforming; the energy absorption can be satisfied, and the height of the energy absorption boxes after deforming can be effectively overlaid and supported at the same time; the residual deformation of the energy absorption boxes after squashing can be guaranteed; and the deformation mode of the energy absorption box basically coincide to the expected design through CAE analysis and test confirmation.

The invention discloses a method for hoisting an entire oversized steel reinforcement cage in one step. The method mainly comprises the steps of: binding a steel reinforcement cage; arranging hoisting points and configuring a crane; connecting a main hoisting hook with the hoisting points; completing horizontal hoisting of the steel reinforcement cage; converting the steel reinforcement cage froma horizontal state to a vertical state; and directly hoisting the steel reinforcement cage in the vertical standing state to be in place by using a third crane. According to the invention, by jointlyhoisting the oversized steel reinforcement cage by using three hoisting equipment and by skillfully transforming the hoisting points in the angle transformation from the horizontal state to the vertical state, the oversized steel reinforcement cage is hoisted in one step without segmentation and structural variation, so that the efficiency in hoisting operation is increased, in addition, concretecan be poured, so that the advantages of construction safety, operability, capability of meeting construction period requirement and increased efficiency are achieved.

The invention belongs to the technical field of processing of rubber tires, and particularly relates to a radial truck tire air-tight layer component and a preparation process thereof. The radial truck tire air-tight layer component comprises the following substances in parts by mass: 100 parts of rubber substrate, 40-100 parts of reinforcing system, 1-10 parts of anti-aging system, 4.7-15 parts of vulcanization system, 0-20 parts of radiation crosslinking sensitizer and 0-50 parts of additive aid. The method comprises the following steps of: mixing other substances except a vulcanizing agent, discharging glue, and adding the vulcanizing agent for preparing a rubber compound; and rolling the prepared rubber compound to obtain an air-tight layer sheet of 3-5 millimeters in thickness, performing cobalt source radiation treatment in the air to obtain the radial truck tire air-tight layer component, wherein the radiation dosage of the air-tight layer sheet is 5-50 kGy. The air-tight layer component which is subjected to radiation pretreatment has the advantages of high Green strength, high structural size stability, high air tightness, and capability of improving the tire quality at a lower radiation dosage.

The invention discloses a workpiece straightening machine which comprises a follow-up thimble, a pressing head, a driving thimble, a bearing supporting column, a work sliding table, a bearing plate, a pressure measuring part and a bending control device. The follow-up thimble, the bearing supporting column and the driving thimble are arranged on the work sliding table, and the work sliding table is in sliding fit with the bearing plate. The bending control device comprises an upper bearing block, a lower bearing block, a feeding block, a spring and a baffle, a through hole is formed in the work sliding table, and the position, below the through hole, on the bearing plate is provided with a cavity used for arranging the bending control device. Meanwhile, the invention further discloses a workpiece straightening method. In the anti-bent straightening process of shaft and rod workpieces, the bending of the workpieces and the stroke of the pressing head can be effectively controlled. It is guaranteed that deformation of the workpieces is within a preset range, and the phenomena of insufficient bending and over bending in the workpiece straightening process are avoided. Particularly to the hydraulically-driven pressing head, the precision control demand of the pressing head strokes can be effectively lowered, operation and production efficiency is improved, and the scrappage of the workpieces is reduced.

The invention relates to the field of machinery manufacturing, in particular to cold bending equipment and a method for manufacturing a U-shaped rod. The cold bending equipment for manufacturing the U-shaped rod structurally comprises a guide rail device which is fixed on a bottom plate; a positive push mould capable of freely moving along the direction of a guide rail is arranged on the guide rail device; the front part of the positive push mould is in a circular arc shape; a groove is arranged on the outer edge of the circular arc shape; a driving rod is arranged on the positive push mould; the driving rod passes through a driving rod base and is connected with a driving device; sideward guiding pulley devices are symmetrically arranged on both sides of the guide rail device; sideward push pulleys capable of freely moving along the direction which is vertical to the guide rail are respectively arranged on both sides of the guide rail device; the driving rods are arranged on the sideward push pulleys, pass through the driving rod bases and are connected with the driving device; and the positive push mould, the sideward guiding pulley devices and the sideward push pulleys are arranged on the same plane. The invention can realize the once-through cold formation of the U-shaped rod, so that no danger occurs in a bending process, and the resilience problem of the U-shaped rod can be solved.

In a valve seat structure of a fluid control valve comprising a valve element(60), a body formed with an inlet port (41) and an outlet port (42), and a valve seat member (50)provided in the body, the fluid control valve being configured to bring the valve element into or out of contact with the valve seat member to control the flow of a fluid, the valve seat member is formed in a ring shape and includes a valve seat portion (51) with which the valve element will come into our out of contact. Assuming that a thickness of the valve seat portion in a radial direction of the valve seat member is a first thickness t1 (0<t1), a second thickness t2 corresponding to a height of the valve seat member in a direction along an axis of the fluid control valve is determined in a range of 0.5 t1<=t2<=1.5 t1.

The production method of internal water cooling channel steel-casting is characterized by that two layers of spiral internal chill are winded round external periphery of steel pipe, in which first layer of spiral internal chill is winded round the steel pipe, and second layer of spiral internal chill is winded round first layer of spiral internal chill, at the same time, when it is poured, the low-temp. nitrogen gas is blown into the steel pipe, the nitrogen gas inlet temp. is -5- -10 deg.C, the nitrogen gas pressure is less than or equal to 0.2 MPa. After the pouring is completed, the low-temp. nitrogen gas is further blown into the steel pipe for 2-4 min. so that the steel pipe will not be melted through and can not be deformed when the molten metal whose melting point is identical to that of steel pipe is poured, therefore there is not gap or thermoresistance layer between steel pipe and base body.

The invention relates to a thin wall bearing, in particular to a heavy-duty thin wall deep groove ball bearing. A bearing machining method comprises five processes of machining an outer ring, machining an inner ring, machining a retainer, machining a seal ring, and assembling the outer ring, the inner ring, the retainer and the seal ring. The method has the advantages that: the grinding accuracy of the inner and outer rings, the deformation of the retainer and a space between the retainer and the seal ring are ensured, so that the inner and outer rings, the retainer and the seal ring are not contacted with each other and do not generate friction, and the service life of the bearing is prolonged; and moreover, noise is avoided, and the requirement on a heavy load of the bearing is met under the condition that the overall size of the bearing is not changed.

The invention relates to a horizontal negative stiffness device with a vertical damping function. The horizontal negative stiffness device comprises a spherical hinge upper connecting plate, a spherical hinge lower connecting plate, a spherical hinge, an arched spherical face, pre-pressing disc springs, viscous dampers, limiting rods, a bearing base, nuts and inside hexagonal bolts; the spherical hinge upper connecting plate and the spherical hinge lower connecting plate are fixedly connected through the inside hexagonal bolts, and the spherical hinge is embedded into the spherical hinge lower connecting plate for fixation and makes contact with the arched spherical face in a pressure-bearing mode; the upper portions of the pre-pressing disc springs are in welding connection with the arched spherical face, and the lower portions of the pre-pressing disc springs are in welding connection with the bearing base. The viscous dampers are arranged at the internal diameters of the pre-pressing disc springs, the upper portions of the viscous dampers are in welding connection with the arched spherical face, and the lower portions of the viscous dampers are in welding connection with the bearing base. The viscous dampers and the pre-pressing disc springs cooperatively work, and meanwhile negative stiffness and damping force are generated; and the limiting rods are connected with the arched spherical face and the bearing base through the nuts, the pre-pressing states of the disc springs are achieved, and the limiting rods are symmetrically arranged on the two sides of the arched spherical face.

The invention provides a submerged-arc automatic welding method of nuclear power plant steel lining wall plates with ceramic linings. The submerged-arc automatic welding method comprises the followingsteps: step 1, carrying out groove processing on steel lining splice plates; step 2, assembling the processed steel lining splice plates in pairs; step 3, mounting arc striking plates; step 4, pasting the ceramic linings; step 5, welding the assembled steel lining splice plates; step 6, dismounting the ceramic linings; and step 7, carrying out non-destructive testing on welds of the welded assembled steel lining splice plates, wherein the steel lining splice plates are mainly adopted as the nuclear power plant steel lining wall plates, nuclear power plant steel lining bottom walls and nuclearpower plant steel lining domes, and the thickness of each steel lining splice plate reaches 6 mm. The submerged-arc automatic welding method provided by the invention has the beneficial effects thatthrough the utilization of the ceramic linings for welding and the reasonable design of welding process parameters, the single-sided welding with double-sided formation during a submerged-arc automatic welding process can be achieved when the steel lining splice plates are shop-fabricated, spliced and welded, the steel lining splice plate turning-over procedure during a conventional double-sided welding process can be avoided, the operation risk can be reduced, and the welding efficiency can be improved.

The invention discloses a grinding device for finish machining of ores. The grinding device for finish machining of the ores comprises a grinding box body; a bearing is clamped in the middle part of the upper surface of the grinding box body; a rotating shaft is sleeved with the bearing; the top of the rotating shaft is fixedly connected with an output shaft of a driving device; the lower surfaceof the driving device is fixedly connected to the upper surface of the grinding box body; a plurality of crushing blades are fixedly connected to the left and right side surfaces of the rotating shaft; and the crushing blades are positioned in the grinding box body. The grinding device for finish machining of the ores, disclosed by the invention, has the advantages that ore raw materials penetratethrough small holes in a screening plate to fall into a grinding groove by arranging the driving device when the ore raw materials are small to a certain degree; a grinding disc can also be driven torotate at a high speed in the rotating process of the rotating shaft so that the ore raw materials in the grinding groove can be ground and machined; the ore raw materials entering the grinding box body are crushed and ground in sequence so that the grinding effect and the grinding efficiency of the grinding disc can be both guaranteed.

The invention discloses a water-soluble quenching medium for hot die steel. The water-soluble quenching medium is prepared by mixing polyalkylene glycol, polyvinyl pyrrolidone, rust inhibitor, bactericide, pH regulator, settling agent, defoaming agent and water uniformly in a ratio. The water-soluble quenching medium is low in production cost, non-flammable and environment-friendly. The water-soluble quenching medium replaces oil quenching media, and fully meets the quenching requirements of the hot die steel such as 4Cr5MoSiV1, 5CrMnMo and 5CrNiMo.

A load detector 1 is provided with a base plate portion 2 to be disposed on a bed installation surface 55, a leg disposing plate portion 13 on which a caster 51 as a leg portion of a bed is to be disposed, the leg disposing plate portion 13 being provided at a tip end portion of a cantilever portion 7 supported generally horizontally in a state in which the leg disposing plate portion 12 is away from the bed installation surface 55, and a distortion detection sensor R attached to the cantilever portion 7, the distortion detection sensor R detecting a distortion of the cantilever portion 7 and outputting a signal to be used to detect a bed load.