23 results about "Rejection rate" patented technology

The invention relates to the technical field of metal casting and powder metallurgy, in particular to a pressure self-adaption adjusting method and system for multi-material forging and pressing, and the method comprises the steps that 1, forging and pressing equipment and a parameter collecting system are initialized; 2, multi-parameter data in the forging and pressing process are collected in real time; 3, calculating the dynamic deformation resistance of the material based on the real-time parameters; step 4, generating a self-adaptive pressure regulation value according to the dynamic deformation resistance; 5, controlling a pressure executing mechanism to output a target pressure value; and 6, the forging and pressing process is continuously monitored and terminated, the step 2 to the step 5 are repeated until the displacement of the die reaches a preset forging and pressing completion position, the central processing unit sends out a termination signal, the pressure execution mechanism gradually unloads pressure to complete the forging and pressing process, and all parameters and adjustment records are stored for quality analysis. Through accurate pressure control and a closed-loop feedback mechanism, defects caused by too high or too low pressure are avoided, the rejection rate is remarkably reduced, and the qualified rate of products is increased.

The invention discloses a clamping and supporting tool for thin-wall parts, and relates to the field of clamping and supporting tools, the clamping and supporting tool comprises a box body part, a square inner groove is formed in the middle of one end of the box body part, a first clamping tool is arranged in the square inner groove, and the first clamping tool is of a frame type structure and is matched with the square inner groove in the box body part; a plurality of first inner grooves which are symmetrically distributed are formed in the peripheral wall of the first clamping tool, the first inner grooves are blind grooves, and clamping springs are fixedly installed at the bottoms of the first inner grooves; by means of the combined structure of a frame type / rod-shaped clamp, an elastic support and a process plate, traditional rigid clamping is replaced, clamping force can be evenly dispersed, plastic deformation during thin-wall part machining is effectively avoided, the size precision, shape tolerance and surface smoothness of parts are guaranteed, and the rejection rate of the parts is reduced; and meanwhile, damage to the inner wall caused by excessive supporting is prevented through the process plate (or the follow-up process plate), and the qualification rate of parts is further increased.

The invention discloses a method for forecasting the abrasion loss of a six-rack ultra-high strength steel cold rolling working roll. The method comprises the steps that rolling data of six racks are collected; the sliding abrasion loss and the rolling abrasion loss between the working rollers of the racks and the strip steel and between the working rollers of the racks and the middle rollers are calculated; correcting by comprehensively considering the influence of the temperature on the hardness of the roller; and outputting the abrasion loss of each rack. According to the invention, the wear condition of the working roll of each rack can be visually presented, the roll body needing to be replaced can be accurately positioned, the consumption cost is effectively reduced, reliable data support is provided for field staff, the stability and the high efficiency of the cold rolling process are ensured, the product quality problem caused by wear is avoided, the rejection rate is reduced, and the overall production efficiency is improved.

The utility model discloses an adjustable positioning metal product cutting device, relates to the technical field of metal processing equipment, and aims to solve the technical problems that the size error of a processed product is large, the production requirement cannot be met, the rejection rate is increased and the production cost is increased as the cutting precision is seriously influenced by the deviation of a current metal rod. Comprising a workbench, a cutting machine is fixedly arranged at the top of the workbench, a clamping piece and an extruding piece are further arranged on the workbench, the clamping piece comprises a limiting seat, an arc groove attached to the surface of a metal stick is formed in the top of the limiting seat, and clamping strips are movably installed at the two ends of the top of the limiting seat; under the action of the electric push rod, the arc-shaped pressing plate in the extrusion piece can apply pressure to the metal stick from the upper portion, the arc-shaped pressing plate and the clamping piece below form the up-down cooperative limiting effect, and the metal stick cutting device has the advantages that in the cutting process, the pressure is dispersed, the stress at the cutting position is uniform, and the cutting precision is improved.

A method for producing a camera. The method includes: providing prefabricated components; adjusting at least two of these prefabricated components relative to one another in accordance with at least one specified optimality criterion; and adhesively bonding the components to one another in the adjusted state; wherein prior data characterizing a specific specimen of at least one of the prefabricated components, and / or measured data in respect of the optical performance of the combination of the components adjusted with respect to one another, are mapped by a trained machine learning model onto a prediction for the optical performance that the camera will deliver once it has run through at least one additional production step after the adhesive bonding; and this prediction is used as feedback for an influencing action on the production process.

The invention discloses a cavity insert grinding and polishing machining process, and belongs to the technical field of cavity insert grinding and polishing. The cavity insert grinding and polishing machining process comprises the following steps that S1, materials are selected; s2, grinding machine mechanical grinding; a high-precision numerical control grinding machine is adopted to preliminarily grind the cavity insert, and grinding wheels of different models are sequentially replaced to grind the cavity insert; s3, manual polishing treatment is conducted through a pneumatic polishing machine; s4, electroplating treatment is conducted, a layer of compact metal film is formed on the surface of the cavity insert in an electrolytic deposition mode, the surface hardness and abrasion resistance are enhanced, the attractiveness of the cavity insert is improved, corrosion can be effectively prevented, and the service life is prolonged; s5, product detection; the cavity insert is machined through the technology, high stability and uniformity of a workpiece in the machining process are guaranteed, smooth and uniform surface quality is provided, compared with a traditional technology, the yield is increased by about 20%, and rework and the rejection rate are greatly reduced.

The utility model relates to the technical field of metal container forming, and discloses a novel structure arch bottom forming die which comprises a die base installed on a cold extruding machine body, a male die and a female die, the male die and the female die are used for arch bottom forming, and the male die comprises a second punch. The female die comprises a die ring and a first punch. The die ring and the first punch are both fixedly installed on the die base, and meanwhile the die ring is arranged on the periphery of the first punch in a sleeving mode. The punch tip of the second punch is of an inwards-concave structure matched with the arch bottom, the top of the first punch is of an outwards-convex structure matched with the arch bottom, and the inwards-concave structure is matched with the outwards-convex structure; an inner ring is fixedly arranged in the die ring and arranged outside the top of the first punch in a sleeving mode. The second punch and the first punch are horizontally arranged oppositely, and meanwhile the second punch and the inner ring are in clearance fit with the clearance larger than zero. The forming height of the arch bottom is increased, the production standard is met, the strength and the pressure-bearing performance of the bottom of the aerosol can are enhanced, the production efficiency and the yield are improved, and the rejection rate is remarkably reduced.

The utility model relates to the technical field of stamping manufacturing devices, and discloses a metal label stamping manufacturing device which comprises a stamping mechanism, a clamping mechanism is arranged at the bottom of the stamping mechanism, and a main body mechanism is arranged at the bottom of the clamping mechanism. The stamping mechanism is arranged, the first stamping shaft and the second stamping shaft are arranged in the stamping mechanism, and the stamping disc is arranged in the stamping mechanism, so that each stamping action can reach preset pressure and position, and the consistency of finished products and the quality of detail processing are improved; by means of a linkage system of the first rotating shaft, the second rotating shaft and the belt and assistance of the first rolling shaft and the second rolling shaft, real-time power transmission and angle fine adjustment are achieved, it is ensured that materials are evenly stressed in the punching process, the rejection rate is reduced, a stable material positioning platform is provided through the clamping mechanism, and the machining efficiency is improved. It is guaranteed that the workpiece does not shift in the high-speed stamping process, and production safety and efficiency are improved.

The invention discloses an intelligent flexible fettling method, relates to the technical field of electric porcelain insulator production and processing, and aims to solve the technical problems that traditional fettling is low in efficiency, poor in precision and insufficient in consistency, and the prior art cannot cope with material shrinkage fluctuation caused by cutting heat. The core innovation of the method lies in breaking the industry inherent cognition of independent regulation and control of cutting parameters and shrinkage compensation, constructing a cutting heat-material shrinkage rate coupling model, reversely deducing actual shrinkage rate deviation by collecting cutting temperature data in real time, synchronously and dynamically correcting allowance compensation parameters and cutting parameters of a fine trimming section, and achieving cooperative coupling regulation and control of the allowance compensation parameters and the cutting parameters. According to the method, equipment does not need to be newly added, associated regulation and control of the cutting heat and the shrinkage rate are achieved only through software logic innovation, the machining precision is remarkably improved, the rejection rate of finished products is greatly reduced, and the method can be widely applied to the field of precision machining of ceramics and composite materials and is high in economical efficiency and generalizability.

The utility model relates to the technical field of packaging machinery, and discloses a folder for assembly line material guiding, which comprises a left folder and a right folder, a plurality of mounting holes are respectively arranged outside the left folder and the right folder, a plurality of feeding grooves are respectively arranged in the middle of the left folder and the right folder, and the feeding grooves are communicated with the left folder and the right folder. The working face of the left folder and the working face of the right folder are fixedly connected with striker plates respectively, the ends, close to each other, of the left folder and the right folder are polished into smooth faces, and the outer portion of the left folder and the outer portion of the right folder are connected with other connecting pieces by installing screws on installation holes. According to the utility model, the adaptive processing of different product packages and the scratch protection of the products in the folding process are realized, so that the appearance integrity of the products is effectively guaranteed, the rejection rate is reduced, the flexibility and universality of package production are improved, and the equipment replacement and adjustment cost is reduced.

The utility model discloses a progressive stamping die for workpiece machining, and relates to the technical field of progressive dies, the progressive stamping die can efficiently complete a plurality of procedures through consistency and consistency of machining of all stations and sequential stamping cooperation of a female die and a male die, the workpiece bending process is stable and reliable through the linkage design of a bending die and a fixing module, and the machining efficiency is improved. Meanwhile, stable demolding of the bent workpiece is achieved through an ejector rod mechanism driven by a spring, deformation or clamping stagnation of the workpiece is effectively prevented, a second upper floating plate presses an ejector block in advance when driving a pressing rod to press downwards, preparation is made for subsequent ejection, the connecting positions of the two ends of the workpiece can be accurately cut off through cooperation of a blanking die and a cushion block, after blanking is completed, the second upper floating plate moves upwards, and the workpiece is prevented from being bent. And the second nitrogen spring rapidly resets and pushes the ejection block to eject the workpiece towards one side, so that smooth and automatic discharging of stamped finished products is achieved, the machining precision is guaranteed, meanwhile, the production efficiency is remarkably improved, and the manual intervention strength and the rejection rate are reduced.

The invention relates to a magnetic steel set blending machine, and belongs to the technical field of strong magnetic material set blending devices. The machine mainly solves the technical problems that an existing magnetic steel set blending process is large in workload, low in production efficiency, high in rejection rate and prone to hurting people. According to the technical scheme, the magnetic steel set blending machine comprises a rack, a panel, a baffle, a guide plate, a pushing device, a pressing device and a rotating discharging device; the panel is arranged at the upper end of the rack, a rectangular through hole is formed in the panel, the rotating discharging device is mounted in the rectangular through hole, the baffle is arranged at the position, located on the edge of the rear side of the rectangular through hole, of the panel, the guide plate is longitudinally arranged on the panel, the front end of the guide plate is connected with the left end of the baffle, the pressing device is arranged at the position, located on the edge of the rear side of the rectangular through hole, of the panel, a channel for containing a magnetic steel set is formed by the pressing device and the guide plate, and the pushing device is arranged at the position, located on the edge of the front side of the rectangular through hole, of the panel and located in front of the channel containing the magnetic steel set.

The utility model discloses a high-precision intelligent molding press with low rejection rate, and relates to the technical field of molding press equipment, the molding press comprises a rack and a console arranged on one side of the rack, and further comprises an automatic feeding assembly, a hydraulic assembly, an upper die assembly and a lower die assembly. Through cooperative work of pressure control, mold monitoring, temperature control and product monitoring, waste products caused by the problems of abnormal pressure, mold faults, product defects and the like can be effectively avoided, and the rejection rate is greatly reduced compared with a traditional molding press; the high-precision pressure sensor, the displacement sensor and automatic positioning are applied, so that the pressure stability and the position precision of the product in the pressing process are guaranteed, and the product quality and the equipment intelligence are greatly improved. Due to the application of automatic feeding, manual operation links are reduced, the production cycle is shortened, and the production efficiency is improved.

The invention discloses a correction method for thin-wall cavity type parts, relates to the technical field of part machining, and aims at solving the problem that the rejection rate of the thin-wall cavity type parts is high. The method comprises the following steps: acquiring first scanning detection data and material attributes of a first part; determining deformation data in the cavity of the first part, and further obtaining a first space structure in the cavity of the part; determining a first filling material for filling the first space structure according to the material attribute of the first part; the first space structure is filled with a first filling material, and a second part is obtained; further performing shape correction on the second part by adopting a preset shape correction scheme to obtain a corrected third part; and the form and position precision of the first part is improved.

A notch punching die for a T-shaped side plate of a battery shell relates to a stamping die and comprises an upper die and a lower die, and the upper die comprises an upper die plate, an upper fixing plate and a pressing plate; the lower die comprises a concave die plate, a lower die plate and a positioning plate; two opposite T-shaped punches are symmetrically fixed to the lower portion of the upper fixing plate through punch fixing sleeves, the large ends of the T-shaped punches are clamping installation ends, the small ends of the T-shaped punches are blade ends, and the distance between the small ends of the two T-shaped punches is the distance L between notches in the two sides of a workpiece. The pressing plate is provided with a channel allowing the T-shaped punch to penetrate through conveniently. The concave template is provided with two symmetrical cavities, and the cavities are matched with the T-shaped punches; the positioning plate is installed on the workbench, and a positioning groove used for positioning and installing a workpiece is formed in the positioning plate in the axial direction. The two symmetrical and opposite T-shaped punches are driven by the upper die to move downwards, notches in the two sides of a workpiece can be punched, and the punching die is easy to operate, has the advantages of being high in size precision, capable of reducing the rejection rate and the like, and is easy to apply and popularize.

The application discloses a kind of processing methods for reducing the scrap rate of steel rim, including slitting, circle, welding, weld treatment, cooling and flaring steps;The welding step: jaw distance L1=11.6+3.8×h, h is the thickness of steel plate;Flash voltage V, when rim diameter D>500mm, V is 8-14.5V, when D≤500mm, V is 3-5V;Flash allowance L2 is 4.5-9mm;Top forging allowance L3 is 3-8mm, top forging speed S is 30-50mm / s;Charged top end time is 0.1-0.5s.This method effectively reduces the rim quality problem and rework frequency caused by improper process through accurate control and optimization of key process of rim processing, shortens production cycle, improves overall production efficiency, reduces production cost, significantly improves the processing quality of steel rim, significantly reduces the scrap rate of steel rim.After actual production verification, the processing scrap rate of steel rim is reduced to less than 5‰ from 1%-2% of traditional method.

The utility model discloses a slider stamping device with high rigidity, which comprises a lower die and an upper die, the lower die is provided with a placing groove and a profiled groove, a plate to be processed is placed in the placing groove, the inner wall of the placing groove is provided with a rotating groove, the upper end face of the lower die is provided with a meshing groove, and the meshing groove is provided with a clamping groove. And a double-thread screw extending into the meshing groove is rotationally arranged in the rotating groove, the double-thread screw is connected with the upper die through a meshing mechanism, a moving block arranged on the double-thread screw in a threaded and sleeving mode is arranged in the rotating groove through a limiting mechanism, and a limiting roller is arranged on the moving block through an inserting mechanism. The limiting roller can effectively prevent the end portion of a plate to be machined from tilting, it is guaranteed that the plate is smooth and stable in the stamping process, the machining quality is improved, and the rejection rate is reduced. And the limiting roller can automatically adjust the position according to the sinking condition of the plate and always corresponds to two ends of the plate.

The invention discloses a tool health state online monitoring method and system based on workpiece machining quality data fusion, and the method comprises the steps: firstly, calculating the deviation between the actual groove width and the standard groove width of a workpiece, and constructing a time sequence of the groove width deviation; then, a sliding time window mechanism is adopted, multi-dimensional time sequence characteristics including the mean value, the standard deviation, the slope, the out-of-tolerance count and the front value are dynamically extracted, and the nonlinear evolution trend in the tool abrasion process is comprehensively described; further, the fused feature vectors can be input into a random forest regression model, and high-precision prediction of the current slot width is achieved; and finally, evaluating the degradation state of the cutter in real time based on the deviation between the predicted groove width and the standard groove width. According to the method, the groove width data in the machining process is directly utilized, additional arrangement of a sensor is not needed, the method has the advantages of being low in cost, high in reliability and high in real-time performance, the rejection rate can be reduced on the premise that hardware investment is not increased, and the service life of a tool is prolonged.

The invention relates to an NM400 wear-resistant steel edge crack control method, and belongs to the technical field of steelmaking continuous casting methods. According to the technical scheme, when first-stage displacement is carried out, in the outward width adjusting process, the relative displacement of a copper plate is equal to the difference between target displacement and a gap; in the inward width adjusting process, the target displacement of the width adjusting screw rod and the target displacement of the copper plate are both negative displacement; in the additional stroke stage, the displacement of the copper plate after the additional stroke needs to be added with a part which cannot be reached due to a gap; at the final position, the final displacement of the width adjusting screw rod considers the influence of the extra stroke displacement, and the final displacement of the copper plate is matched with the target displacement and the gap filling condition. According to the invention, the consistency of the actual displacement and the target displacement is ensured, so that the accurate control of the taper is ensured; and the quality and the production stability of the casting blank are remarkably improved, the rejection rate in the production process is reduced, the overall performance of the continuous casting process is optimized, and higher production efficiency and economic benefits are brought to the steel smelting industry.

The invention relates to the technical field of inner shaft machining, in particular to a wafer conveying mechanical arm inner shaft machining method which comprises the following steps: step 1, a material pretreatment stage; 2, a composite heat treatment stage; 3, a precision machining stage; 4, a surface treatment stage; 5, a detection and calibration stage; according to the method, through material-process-detection full-link innovation, comprehensive improvement of the performance of the inner shaft is achieved, in the aspect of materials, Cr / Ni / Cu ternary synergistic alloy is combined with nano precipitation strengthening, the tensile strength reaches 1200 MPa and is improved by 20% compared with traditional stainless steel, grains are refined to ASTM 10-12 level through gradient solid solution and vacuum aging treatment, the grain boundary area is increased by 50%, the hardness uniformity is controlled to be HV + / -15, and the performance of the inner shaft is improved. Vibration suppression and thermal expansion compensation models are integrated in the machining link, + / -0.5 mu m / m thermal deformation control is achieved, the surface roughness Ra is smaller than or equal to 0.2 mu m through PCBN tool mirror machining, an intelligent detection system triggers nanoscale compensation grinding through three-coordinate closed-loop feedback, and the rejection rate is reduced to 0.1% from 5%.

The invention relates to the technical field of screw machining, and provides a low-rejection-rate heading machine for machining screws, which comprises a main body, a rotating shaft is rotatably mounted on the surface of the main body, a conveying disc is fixedly mounted on the circumferential surface of the rotating shaft, and a feeding mechanism for conveying and machining objects is arranged on the surface of the main body. According to the heading machine with the low rejection rate for machining the screws, materials are rotationally conveyed under the action of the conveying disc until the materials make contact with the surface of the discharging mechanism, and then the machined materials move in the direction away from the conveying disc under the action of the discharging mechanism; the stability and reliability from material conveying to machining are improved through cooperation of the conveying disc and the main body, meanwhile, the device adapts to materials of different lengths, and the adaptability and universality of the device are improved; according to the technical scheme, the technical problem that in the prior art, when multiple batches of screws are subjected to heading treatment, the screw heading treatment efficiency is affected due to the single machining mode of the screws is solved.

The invention relates to the technical field of steel and iron material processing, and discloses a component-end quenching synergistic process for hardenability bandwidth control of CrMnMo series gear steel. Comprising the steps of S1, component accurate design and regulation, S2, smelting process optimization and component homogenization, S3, continuous casting process control and segregation inhibition, S4, rolling-controlled cooling collaborative process optimization, S5, end quenching test and hardenability accurate calibration and S6, finished product inspection and feedback optimization. And through main alloy element narrow interval design, segregation suppression and end quenching cooperative calibration, the hardenability bandwidth of the gear steel is stably controlled to be smaller than or equal to 4 HRC, the J9 hardness ranges from 36 HRC to 49 HRC, and the J15 hardness ranges from 30 HRC to 44 HRC, the requirement of high-end part machining for hardenability uniformity is completely met, and the machining rejection rate caused by hardenability fluctuation is greatly reduced.

The invention provides a stamping process method of a front wallboard, which realizes process simplification through innovative drawing parting line optimization design and comprises the following steps of: firstly, acquiring a three-dimensional digital model of the front wallboard, performing geometric topology fusion on a profile sunken notch and a product body to reconstruct a continuous model, and extending a process supplement surface to an outer profile to enable a parting line to move outwards; the flowing track, thickness change and stress-strain distribution of the plate are analyzed and verified through multi-physical-field CAE, and it is ensured that no cracking and wrinkling risk exists; designing a four-procedure construction method based on the verification result, wherein the four procedures include a drawing die, a trimming and punching die, a flanging and sizing die and a secondary trimming and punching die; in the die manufacturing stage, the drawing die blank holder and the male die synchronously move outwards by a preset distance in the notch area; and finally, the size precision of the part reaches the standard through batch production verification. According to the scheme, a blanking die is successfully omitted, the tool cost is reduced, the production efficiency is improved, and meanwhile the rejection rate tends to zero.