1963 results about "Machine press" patented technology

The invention relates to the technical field of press monitoring, in particular to a digital twinning-based three-dimensional monitoring system for a precision servo press, which comprises a physical layer sensing module for acquiring real-time operating parameters, environment variables and workpiece processing data of the press; the dynamic twin construction module constructs a total-factor digital twin, and simulates a force-heat-deformation coupling effect by using finite element analysis and a multi-body dynamics algorithm based on physical attributes and process parameters; the intelligent analysis center identifies a potential fault mode of the press machine and locates an abnormal source through multi-physics field simulation data in combination with an improved CNN-LSTM model; the three-dimensional visual interaction unit constructs an interactive immersive three-dimensional virtual scene, renders a running state and a processing process in real time, and generates a maintenance strategy; and the self-adaptive regulation and control unit predicts the residual life of the key component and dynamically adjusts parameters according to a maintenance strategy and real-time monitoring data. Therefore, the problems of single monitoring dimension, disjunction of maintenance strategies and the like in the prior art are solved.

The invention discloses a control method and system of a servo press, and relates to the field of press control, a force displacement curve is obtained in real time from a current punching period, a key feature vector of the force displacement curve is extracted, the key feature vector is compared with an ideal golden feature vector, and a multi-dimensional deviation vector is obtained. Particularly, a deviation decoupling method based on morphological analysis is introduced, and the total deviation can be accurately decomposed into a thermal drift compensation amount caused by the thermal effect of equipment and a material characteristic compensation coefficient caused by plate performance fluctuation by analyzing translation and zooming differences of a current curve and a gold curve in form. Therefore, independent and accurate compensation can be carried out for a physical source, the problems of information aliasing and compensation failure caused by the fact that disturbance sources cannot be distinguished in the prior art are effectively solved, intelligent and feed-forward type cooperative compensation for the next stamping period is achieved, and long-term stability and high precision of the production process are ensured.

The invention belongs to the technical field of bearing fault diagnosis, and particularly discloses a press machine bearing fault diagnosis method and system, a terminal and a medium, and the method comprises the steps: collecting multi-source signal data of a press machine bearing in an operation process; performing denoising and standardization processing on the signal, and extracting time domain and frequency domain features; different sensor features are fused, and multi-dimensional feature representation is constructed; inputting the features into a deep learning model combining a convolutional neural network and a long-short-term memory network for training and reasoning, and introducing a multi-kernel maximum mean value difference strategy to realize feature distribution alignment; and performing fault identification on the real-time signal based on a multi-label classification mode, and triggering an alarm when the prediction probability meets a preset condition. According to the method, fusion modeling of multi-source data and accurate recognition of composite faults are achieved, and the method has high cross-working-condition adaptive capacity and real-time diagnosis capacity and is suitable for intelligent operation and maintenance scenes of press equipment.

The invention relates to the technical field of metal powder manufacturing products, in particular to an automatic ring part production line and a process control method.Bar heating furnaces of the production line are arranged on the inner side and the outer side of a guide rail in two rows and multiple sets, a transfer manipulator is arranged on the guide rail, a ring forging press machine is arranged at the front end of the guide rail, and a movable workbench is arranged at the ring forging press machine; the ring rolling machine is arranged in front of the ring forging press machine, the center line of the ring rolling machine and the center line of the ring forging press machine are obliquely arranged, a carrying mechanical arm is arranged between the ring rolling machine and the ring forging press machine, the conveying roller way is arranged in front of the ring rolling machine, and the center line of the conveying roller way and the center line of the ring rolling machine are obliquely arranged. The center line of the conveying roller way is parallel to the center line of the ring forging press, and the swing manipulator is arranged in an included angle formed by the ring rolling machine and the conveying roller way. According to the production line and the control method, the production process is optimized, the production efficiency is improved, and the production cost is reduced.

The utility model relates to a connecting rod copper bush assembling tool which comprises a pressing head installed on a press machine, a circular pressing plate fixed to the lower end of the pressing head and a cylindrical supporting seat fixed to the pressing plate and capable of being inserted into a copper bush, two positioning pins capable of being inserted into or moved out of oil holes of the copper bush are arranged on the supporting seat, and the positioning pins are connected with a linkage telescopic mechanism. The upper end of the rotating shaft is rotationally connected with the pressing plate, the driving lever is used for driving the rotating shaft to rotate, the torsional spring is arranged on the rotating shaft in a sleeving mode and used for resetting the driving lever, a connecting plate is fixed to the lower end of the rotating shaft, and the two positioning pins are connected with the connecting plate through connecting arms respectively. A limiting piece used for limiting the shifting rod is installed on the pressing plate. According to the utility model, the problem of unqualified product quality caused by inaccurate oil hole alignment is avoided, and the production quality and the production efficiency of the product are improved.

The invention relates to the technical field of motor servo control, and discloses a dual-motor servo press energy efficiency optimization method based on edge calculation. According to the method, operation parameters of a main driving motor and an auxiliary motor are collected in real time through edge calculation nodes deployed on a dual-motor servo press body; dynamically constructing a dual-motor cooperative load state matrix based on the operation parameters, and calculating a real-time comprehensive energy efficiency index by using an energy efficiency evaluation model in an edge calculation node; according to a deviation value between the index and a target energy efficiency threshold value, determining a dynamic energy efficiency adjustment parameter of the double motors; sending an instruction to the controller by the edge computing node, and synchronously updating a power distribution strategy; and monitoring and feedback adjustment are executed circularly until the dual-motor cooperative load state reaches a preset energy efficiency stable interval. According to the method, real-time monitoring and dynamic optimization of the dual-motor cooperative operation state are realized, and the energy efficiency stability of equipment operation is improved.

The invention discloses a control system and method of an intelligent servo press, relates to the technical field of press control, and constructs a uniform stamping state representation through deep excavation and fusion of force and displacement process data streams generated in the servo press. On the basis, a double-time-scale implicit state estimation algorithm is introduced, time sequence modeling and deep analysis are carried out on weak and gradual change characteristics contained in a full-stroke force displacement curve, and therefore accurate quantitative evaluation of the implicit state of mold abrasion is achieved. Then, the quantized wear value serves as a core decision factor, a self-adaptive control mechanism based on a compensation knowledge base is driven, and an optimal process compensation strategy and a sliding block target track are dynamically generated. Therefore, the product quality consistency in the precise stamping process can be improved, the service life of the die is effectively prolonged, the production cost is reduced, and the intelligent level of stamping production is comprehensively improved.

The invention discloses a pressing device for rubber product processing, and relates to the technical field of press machines for rubber processing, the pressing device comprises a press machine rack, a press roller driving mechanism, a pressure adjusting piston, a main press roller, an auxiliary press roller, a pressure feedback piece, a magnetic compensation piece and a rubber contour prediction piece, the press machine rack is internally provided with a pressing chamber; a main compression roller and an auxiliary compression roller are installed through a supporting seat and driven by a compression roller driving mechanism to rotate, a pressure adjusting piston adjusts the overall pressure of the main compression roller, a pressure feedback piece on the main compression roller can dynamically detect the pressing pressure and generate a magnetic field, and a magnetic compensation piece of the auxiliary compression roller is matched with the magnetic field to achieve local pressure compensation. Compared with an existing press machine, the press machine has the advantages that the press fit quality and stability of rubber products can be improved through pretreatment detection, gradient pressure compensation and multi-parameter cooperative control, and the production efficiency is improved. And the universality and adaptability of equipment are enhanced.

The invention discloses an automatic die changing control system of a press machine. The automatic die changing control system comprises a programmable logic controller, electrical hardware electrically connected with the programmable logic controller and an execution component. The programmable logic controller is configured to achieve the control functions of sliding block die-filling height adjustment, balancer air pressure adjustment, die clamping device action, movable workbench operation and die identification number switching, and triggers at least two control functions to be executed in parallel in the die changing process. The programmable logic controller is connected with all electrical hardware and execution components through preset program logic so as to control starting, running and ending of the automatic die changing process in the whole process.

A center hole is formed in a base, the lower end of a guide sleeve is coaxially fixed to the upper end of the base, a lower die is installed in the guide sleeve in a matched mode, and the lower end face of the lower die makes contact with the upper end face of the base. The conical section at the upper end of the valve rod and the lower half portion of the large-diameter section are matched with a lower die hole in the upper end of the center hole of the lower die, the upper die is arranged in the guide sleeve in a matched mode, an upper die hole in the lower end of the center hole of the upper die is matched with the large-diameter section of the valve rod, and the upper end of the upper die extends out of the guide sleeve. And the upper end of the valve rod is deformed and turned inwards until the belleville spring and the maximum-diameter position of the lower end of the valve head are completely wrapped in the stepped hole of the large-diameter section of the valve rod. According to the utility model, the technical problem that the valve rod assembly of the indicator valve cannot be directly assembled is solved, the problem that the valve head is arranged in the inner hole of the valve rod and the stroke of the valve is ensured by accurately controlling the length of the inner cavity when the valve head, the valve rod and the belleville spring of the indicator valve are assembled is effectively solved, the valve rod assembly is ensured to be smoothly assembled, and the assembling quality and the processing efficiency are ensured.

A surrounding rock deformation and failure test system with a rotatable stress main shaft in a three-dimensional crustal stress field is characterized in that a press machine upper pressure head and a press machine base are oppositely distributed up and down, and a loading hydraulic cylinder is connected with the press machine upper pressure head; the surrounding rock sample is vertically arranged in the axial loading space, and a simulation roadway is formed in the axis part of the surrounding rock sample; annular upper and lower end plates are fixedly connected in the upper and lower ends of the confining pressure cylinder respectively; the confining pressure cylinder sleeves the outer side of the axial loading space; a plurality of groups of mounting holes are uniformly formed in the circumferential directions of the annular upper and lower end plates; the radial pressurizing assembly comprises a supporting steel pipe and an elastic capsule. The main supporting section is sleeved with the elastic capsule, and a plurality of through holes are formed in the main supporting section. A plurality of strain bricks are pre-buried in the surrounding rock sample; the track is fixedly mounted in the simulated roadway; the micro camera is assembled on the track through the electric control trolley; and the strain gauge II and the acoustic emission probe are arranged in the simulated roadway. According to the system, the working condition that the direction of a stress field changes can be simulated in a three-dimensional true triaxial stress environment.

The invention discloses a method for manufacturing an aluminum alloy thin-wall part through hot shape correction of a rubber bag after sheet metal forming. The method comprises the steps that firstly, an aluminum alloy thin-wall part blank is obtained through sheet metal forming; secondly, the blank is subjected to solution treatment; thirdly, the blank obtained after solid solution treatment is put into a refrigerator to be stored; fourthly, the rigid mold, the rubber bag and the like are installed on a press machine, overall heating is conducted, and the temperature is kept stable; fifthly, the blank obtained after solid solution is rapidly placed above a hot-state rigid mold, and positioning of the rigid mold and the blank is completed; 6, quickly closing the die, pumping hydraulic oil into the rubber bag, and increasing the pressure of the press machine to the set pressure; seventhly, the rubber bag extrudes the blank to enable the blank to be tightly attached to the rigid mold, and the mold temperature is transmitted to the blank; 8, under the combined action of high pressure and a thermal field, the aluminum alloy is subjected to aging strengthening and stress relaxation, and springback is reduced; 9, unloading the pressure of the rubber bag and the hydraulic machine; and 10, opening the press machine to take out the blank, and uniformly cooling in a cooling tool to obtain a thin-wall part finished product.

The invention relates to a temperature control system and a temperature control method for a kinematic pair of a press transmission system in the technical field of presses, and the temperature control system for the kinematic pair of the press transmission system is characterized in that according to the kinematic pair of the press transmission system, a temperature measuring point is arranged at a transmission part which is easy to heat; an infrared thermometer is arranged on a press machine cross beam corresponding to a temperature measuring point and used for directly detecting the temperature of the measuring point, the infrared thermometer is fixed on the press machine cross beam through a mounting support and connected with a programmable logic controller (PLC), and the PLC is further connected with an output display terminal and an overheat alarm. According to the temperature control system for the kinematic pair of the press transmission system, the infrared thermometer for indirectly measuring the temperature is in control connection with the PLC and the lubricating system, so that it is ensured that a transmission part is within a controllable and safe temperature range, and automatic coordination control over the temperature of the transmission part and the lubricating system is achieved.

The present invention provides an open fixed-table press, which belongs to the technical field of presses; it comprises a worktable and a press body arranged on the worktable; it also comprises a U-shaped waste trough arranged around the outer wall of the worktable, a baffle arranged inside the waste trough, and a driving mechanism capable of driving the baffle to perform vertical displacement; the baffle comprises two parallel first baffles, and a second baffle arranged between the two first baffles and perpendicular to the two first baffles; the two first baffles can be moved in a direction away from or close to the second baffle respectively through a first moving device; the second baffle can be moved in a direction away from the worktable through a second moving device; the scheme of the present invention can effectively protect the worktable when the press body is operating, avoid injuries to workers during the splashing process of sputtering materials, and improve the safety of the open fixed-table press.

The hydraulic support roof beam maintenance press machine comprises a frame, a first pressure unit and a second pressure unit are arranged at the bottom of the frame, a first rotating driving part and a plurality of groups of pressing wheels are arranged on the first pressure unit, a fixed plate is arranged at the bottom of the second pressure unit, a plurality of pressing blocks are arranged on one side of the fixed plate at intervals, a second rotating driving part is arranged on the second pressure unit, a transmission gear is drivingly connected to the rotating output end of the second rotating driving part, a knocking block is eccentrically arranged on the transmission gear, the second rotating driving part can drive the transmission gear to rotate, so that the pressing blocks can be close to the fixed plate, and the fixed plate and the pressing blocks constitute a double-side pressure shaping structure of the hydraulic support roof beam side plate. The hydraulic support roof beam maintenance press machine is favorable for solving the problems that some existing press machines are fixed and difficult to break through the site limitation, and the maintenance of the hydraulic support roof beam side plate is time-consuming and laborious.

The invention relates to the field of press machine detection, and particularly discloses a press machine anomaly detection method, which comprises the following steps of: segmenting continuous force and displacement signal flow into independent stroke data segments, and extracting multi-dimensional feature vectors containing statistics, form and frequency domain information from the stroke data segments so as to comprehensively describe the state of each stamping stroke. Then, inputting the current stroke feature vector into an acute anomaly detector based on a heterogeneous auto-encoder, and sensitively capturing an emergent and isolated abnormal event in a high reconstruction error form by learning a reconstruction mode of normal data; besides, a chronic reference drift detector based on a Wasserstein distance is utilized, and systematic slow drift caused by equipment wear or working condition change is identified by analyzing distribution change of feature vector flow within a period of time. And finally, through an intelligent decision-making and arbitration mechanism, the acute abnormal score and the drift signal are fused, and a real equipment fault is identified.

The invention relates to the technical field of press machines, in particular to a multi-station gear hot die forging press machine which comprises a press machine body, a mounting structure, a fixing structure, a jacking structure, a storage structure, a dust collection structure, a collection structure and a fourth driving part. The arrangement of the dust collection structure facilitates suction of a large amount of waste residues, prevents the waste residues from accumulating in a working area to affect forging precision and equipment operation, prevents the waste residues from entering moving parts of the press machine to cause abrasion or clamping stagnation, guarantees stable operation of the press machine body, timely cleans the waste residues, can improve the working environment, reduces the cleaning time of operators, and improves the working efficiency. The falling height of the gear workpieces is reduced by increasing the height of a lifting plate in the collecting structure, the situation that due to the fact that the falling height is too high, the gear workpieces collide with one another, and the mass is reduced is prevented, a plurality of mounting blocks are driven to slide when a transmission shaft rotates in the mounting structure, and mounting rods on two mounting bases are conveniently and rapidly fixed; therefore, the replacement efficiency of the mold is improved.

The utility model discloses a bridge support detection device which comprises a base and a support on the upper portion of the base, a hydraulic cylinder is installed in the center of the upper portion of the support, a piston rod of the hydraulic cylinder is fixedly connected with an extrusion block on the lower portion of the support, and a guide rail is arranged on the upper portion of the base. A lifting assembly is arranged at the position, right opposite to the extrusion block, of the guide rail, and the feeding trolley can fall down to be tightly attached to the support through the lifting assembly so that the bridge support can be stably supported. And the guide rail directly faces the lifting assembly of the extrusion block, so that the feeding trolley falls to be tightly attached to the support to stably support the bridge support, feeding is easier through the feeding trolley, blocking and limiting of the extrusion block and the press support are avoided, and feeding safety is guaranteed.

The invention discloses automobile structural member high-performance aluminum alloy die-casting equipment, and relates to the technical field of automobile structural member die-casting molding, the automobile structural member high-performance aluminum alloy die-casting equipment comprises a base, and a pressure injection device is fixed on the upper end face of the base; the supporting seat is fixed on the base; the movable mold plate is arranged on the supporting seat in a sliding manner; the press machine is fixed in the supporting seat, and the output end of the press machine is connected with the bottom of the movable template; the fixed mold plate is fixed on the supporting seat and is communicated with the pressure injection equipment; the pressurizing assembly is fixed to the supporting base, and the output end of the pressurizing assembly is connected with the movable mold plate; the multiple self-locking assemblies are arranged in the fixed mold plate in a sliding mode; the mold locking assembly is installed on the upper end face of the supporting base.

The invention provides a full-high-viscosity paste stirring anti-wall-hanging device, and relates to the technical field of mining machinery. The device comprises a horizontal stirring tank, a first stirring shaft and a second stirring shaft which are arranged in parallel, a transmission system and a scraper assembly, a feed port is formed in the top of the stirring tank, and a discharge port is formed in the bottom; the first stirring shaft and the second stirring shaft synchronously and reversely rotate through a gear box, and flat plate paddles and scraper mounting shafts are alternately arranged on the two shafts; and the scraper assembly is connected with the scraper mounting shaft through an elastic pressure mechanism. According to the device, uniform mixing of high-viscosity materials and efficient wall sticking prevention are realized through synchronous reverse rotation of double shafts, dynamic pressure scraping plates and informatization dynamic adjustment. The device is suitable for continuous industrial production of materials such as high-concentration waste stone tailing paste and cementing materials, and the problems that a traditional double-shaft stirring machine adheres to walls and blocks, and is high in energy consumption and difficult to maintain are solved.

The invention discloses a corrosion-resistant and wear-resistant composite metal plate, which relates to the technical field of composite metal materials, and is technically characterized by comprising the following steps: firstly, preparing a flux-cored wire, and preparing deposited metal components according to mass percent by using a specific low-carbon steel strip; then, a thick low-carbon steel plate or a low-alloy steel plate serves as a base plate, a double-layer structure is formed through a gradient surfacing technology, a transition layer is prepared according to the proportion, a main wear-resisting layer is formed by fusing and diffusing flux-cored wires and contains various high-hardness wear-resisting phases, the lap joint width is controlled, cooling is conducted, and a surfacing composite layer is formed; the surfacing composite layer is integrally leveled through a press machine, and a semi-finished product is obtained; and finally, mixing organic silicon modified polyester resin and the like to prepare a joint sealing agent, coating the semi-finished product for 3-4 layers, and curing to obtain a finished product. The wear-resistant layer is free of cracks, and the corrosion resistance of the base body is improved.

The invention provides a gear multi-station hot die forging press capable of rapidly replacing dies, and relates to the technical field of gear machining, the gear multi-station hot die forging press comprises a fixing frame body, and a fixing base is installed at the bottom of the fixing frame body; a spring is installed at the bottom of the guide supporting plate, the side end of the spring is connected with the bottom of the fixing plate, and an open groove is formed in the top of the guide supporting plate. A driving cylinder is mounted at one end of the bottom of the fixing frame body, and a force application guide rod is mounted at the output end of the driving cylinder and penetrates through an open groove in the top of the guide supporting plate; and the force application guide rod is mounted on one side of the bottom of the mold fixing seat in a sliding manner. The guide rod moves upwards to push the mold fixing seat to drive the multi-process mold to move outwards, and the multi-process mold is separated from the clamping plate and falls on the guide supporting plate by utilizing the self weight, so that quick demolding is realized, the replacement efficiency of the multi-process mold is improved, and the problems that the mold is heated to swell due to high temperature of a gear blank, and the mold cannot be directly taken out upwards are solved. The operation process is time-consuming and labor-consuming.

The invention relates to the technical field of die manufacturing, in particular to an aluminum alloy hub extrusion casting combined die which comprises a lower die assembly, an upper die assembly is matched with the top of the lower die assembly, the top of the upper die assembly is connected with the lifting end of a press machine, and the bottom of the lower die assembly is fixedly arranged. Pouring exhaust units are symmetrically arranged at the tops of the left side and the right side of the lower mold assembly correspondingly and communicate with a hub cavity in the lower mold assembly, side mold opening mechanisms are installed on the left side and the right side of the lower mold assembly correspondingly, and the two side mold opening mechanisms are used for controlling lateral opening and closing of the hub cavity. The upper die assembly is used for controlling opening and closing of the top of the hub cavity. The production efficiency of the aluminum alloy hub is remarkably improved through gradient pulse pouring, on-demand graded cooling and cooperative work of the inner cooling unit and the bottom cooling unit.

An upper die is movable through a die guide rail on a lower portion of a ram in a press machine and a connection rail connected to the die guide rail. The upper die includes, on right and left sides of a center portion as viewed in a front-rear direction, protrusions that protrude in the front-rear direction and move while being guided by grooves included in the die guide rail and the connection rail. The protrusions each include an outer guided portion on an outer side in a transportation direction relative to the center portion and an inner guided portion on an inner side closer to the center portion than the outer guided portion, and a distance in the transportation direction between the outer guided portion and the inner guided portion is greater than a clearance distance between the die guide rail and the connection rail.

The disclosure discloses an oil circuit system, a lifting device, an electric jack, a press, a crane, and a tire mounting / dismounting and transport apparatus. The oil circuit system comprises a lifting oil cylinder, the tank, the first oil feed line, the second oil feed line, the oil inlet / outlet line, the pressure relief line, the oil return line, the first valve, the second valve; the first oil feed line is the gear pump assembly oil feed line; and the second oil feed line is the plunger pump assembly oil feed line. Under no-load or low-pressure conditions of the lifting device, the gear pump assembly can quickly pump a larger volume of low-pressure hydraulic oil, enabling quick lifting or lowering of the lifting device. Under high-pressure conditions, the plunger pump assembly can quickly pump higher pressure hydraulic oil to the lifting oil cylinder to enable slow lifting or lowering.

The invention relates to the technical field of mechanical equipment fault diagnosis, and particularly discloses a press machine fault early warning method and system, and the method comprises the steps: collecting operation state data; constructing a plurality of dynamic thresholds; automatically generating a conflict logic set according to the dynamic threshold, and calculating a priority score for the conflict logic set to generate an optimal logic result; generating press machine fault early warning information in combination with the fault prediction model; in the prior art, conflicts are easy to occur and misjudgment is caused under a multi-logic condition, and especially the technical problem that logic conflicts cannot be effectively processed and clear diagnosis and explanation cannot be provided under the condition that multiple data sources dynamically change in the operation process of the press machine is solved. According to the method, accurate fault diagnosis and clear explanation under the condition of multiple logic conflicts are realized through a digestion method combining logic conflict detection and priority scoring, so that the problem of misjudgment caused by complex decision logic is avoided, and the accuracy and interpretability of press fault early warning are improved.

The utility model relates to a gear disc forge piece blanking device which comprises a hot die forging press, a blanking mechanical arm capable of lifting and moving left and right is arranged on the right side of a workbench of the hot die forging press, a blanking conveying device is arranged below the blanking mechanical arm, and a material receiving device is arranged at the discharging end of the blanking conveying device. The blanking device for the gear disc forgings is reasonable in design, convenient and practical, achieves mechanical blanking of the gear disc forgings on a hot die forging press, completes blanking operation of the gear disc forgings through the blanking manipulator, is high in machining efficiency, reduces manual participation, and improves production safety.

The invention provides a rapid resin curing device and a using method thereof, and belongs to the technical field of material molding, the rapid resin curing device comprises a lower die, an upper die, a first insulating part and a press machine which are sequentially arranged on a workbench from bottom to top; the lower die and the upper die are both connected with the high-frequency oscillating circuit device; and the lower mold and the upper mold are connected with a mold temperature controller through a mold temperature controller pipeline. The high-frequency electromagnetic field effect is superposed for resin curing while heating and pressurizing, the resin curing efficiency is improved, the occupied time of curing equipment and a mold is greatly shortened, and large-scale curing production of resin products is facilitated.

The invention provides a manufacturing method of a hard alloy for a hard rock cutting pick, which relates to the field of alloy preparation and comprises the following steps: step 1, preparing raw material powder for preparing the hard alloy for the hard rock cutting pick according to the proportion of raw materials; 2, mixing the raw material powder in the step 1 to obtain mixed powder; 3, putting the mixed powder obtained in the step 2 into a lower mold, and pressing on a press machine to obtain a pressed blank; step 4, sintering: primary sintering: putting the pressed green body into a first sintering furnace, and sintering at a first preset temperature; secondary sintering: putting the green body subjected to primary sintering into a second sintering furnace, and sintering at a second preset temperature; and 5, the hard alloy block obtained after secondary sintering is subjected to finish machining treatment according to the design size of the hard alloy part of the hard rock cutting tooth. According to the method, double-temperature-zone sintering is conducted, impurities / stress is removed through primary sintering (protective atmosphere), and grain growth is precisely regulated and controlled through secondary sintering (vacuum).

The invention relates to a closed type double-point multi-connecting-rod servo press which comprises a press body, a transmission box, a lead screw, a lower bearing, a lower supporting sleeve, a nut and a driving sliding block. A servo motor is arranged at the upper end of the transmission box; the upper end of the screw rod is connected with the servo motor through a cylindrical pin; an upper lubricating end cover is arranged at the upper end of the driving sliding block, a lower lubricating end cover is arranged at the lower end of the driving sliding block, sealing felt is arranged at the upper end of the upper lubricating end cover, and the driving sliding block, the upper lubricating end cover and the sealing felt are matched to form an upper lubricating cavity. The lower lubricating end cover is connected with a telescopic sleeve arranged on the bottom plate, the driving sliding block, the lower lubricating end cover, the telescopic sleeve and the bottom plate are matched to form a lower lubricating cavity, a circulating oil way is arranged between the upper lubricating cavity and the lower lubricating cavity, lubricating oil in the lower lubricating cavity is conveyed into the upper lubricating cavity through the circulating oil way, and the circulating oil way passes through the lower bearing and is communicated with the lower lubricating cavity. Lubricating oil in the circulating oil way lubricates the lower bearing. The invention has the advantages of reasonable structural design, closed lubrication, good lubrication effect, high transmission precision and the like.