262results about "Investigating machinability" patented technology

The invention discloses a grinding state and grinding wheel wear monitoring system and method based on multi-sensor fusion, which realize multi-physical-quantity coupling modeling and improve the monitoring precision through cooperative deployment of micro array thermocouples, strain force sensors and vibration sensors and in combination with a time domain and frequency domain feature extraction technology. The system adopts a non-contact power supply design, electromagnetic induction power generation is driven through rotation of the main shaft, real-time signal processing and wireless transmission of a circuit board in the grinding wheel are supported, and the problem of power supply in a high-speed rotation scene is solved. And meanwhile, dimension reduction processing is conducted on the multi-sensor features through an offline network model, self-adaptive adjustment of grinding parameters and ultrasonic amplitude is achieved through dynamic regulation and control logic, and the downtime and the rejection rate are remarkably reduced. The method has remarkable creativity, practicability and economic benefits, fills the blank of fragmentation monitoring and regulation and control lag in the prior art, and improves the stability and machining quality of the grinding process.

The invention belongs to the technical field of machining, and particularly relates to an ultrasonic internal broaching test platform and an ultrasonic vibration mode control method.The test platform comprises a base, a broach and a clamping mechanism, and the clamping mechanism comprises a supporting ring and a clamping sleeve; a clamping groove is formed in the broach, and a protrusion matched with the clamping groove is arranged on the clamping sleeve. A plurality of supporting columns are arranged on the base, and the supporting columns are arranged in a circular shape. The broach is arranged in a space defined by the multiple supporting columns. And a piezoelectric actuator is arranged on the broach. Based on the platform, the invention provides the control method of the ultrasonic vibration mode, modal drift can be optimized and reduced by adjusting the pre-tightening force and the ultrasonic power supply driving frequency, the pre-tightening force is adopted to adjust and stabilize the contact rigidity, and the energy loss can be reduced; through frequency tracking, resonance points are matched in real time, and energy transfer can be maximized; the two modes are cooperatively controlled, response speed and stability are both considered, and the method adapts to high-dynamic loads.

A cutting coefficient identification system includes a measured cutting force acquisition unit, an estimated cutting force calculation unit, and a cutting coefficient identification unit. The measured cutting force acquisition unit acquires an average torque Ta of at least one of the tool main spindle motor, the workpiece main spindle motor, and the feed shaft motor. The estimated cutting force calculation unit calculates an estimated cutting force that is an average cutting force during one rotation of the tool main spindle or the workpiece main spindle, based on a calculation formula including a cutting coefficient Kc representing a cutting force per unit cutting cross-sectional area and a cutting coefficient Kc representing a cutting force per unit cutting edge length. The cutting coefficient identification unit identifies the cutting coefficient Kc and the cutting coefficient Kc by comparing the measured cutting force with the estimated cutting force.

The invention discloses a rock drillability grade prediction method based on fixed bit pressure, and the method comprises the following steps: 1, carrying out fixed bit pressure drilling, and obtaining an actual measurement relation curve between the rock breaking depth and the drilling time; 2, according to the relation between the contact area of the drill bit teeth and the rock and the drilling depth, the relation between the drilling depth and the rock breaking volume of the drill bit is obtained; according to the relation between the drilling depth and the rock breaking volume of the drill bit, a theoretical relation curve between the rock breaking depth and the drilling time is obtained; 3, fitting the actual measurement relation curve and the theoretical relation curve to obtain the rock breaking volume in unit time; 4, obtaining the rock breaking time according to the rock breaking volume per unit time obtained in the step 3; obtaining a corresponding rock drillability grade according to the rock breaking time; while the rock drillability grade is accurately deduced and predicted, the number of experimental groups for drillability grading is effectively reduced, the experimental process is simplified, and the rock core and measurement time is saved.

The invention discloses a steel easy-cutting performance detection method and device, a medium and equipment. The method comprises the steps that the first target drilling force of a steel sample is obtained; acquiring a second target drilling force of the steel to be measured; based on the first target drilling force and the second target drilling force, the easy cutting index of the to-be-tested steel is determined, and the easy cutting index is used for representing the easy cutting performance of the to-be-tested steel. Through the technical scheme provided by the invention, the convenience of detecting the easy-cutting performance of the steel can be improved.

The utility model discloses test equipment for research and development of a numerical control machine tool cutter, which is applied to the field of research and development of cutters and comprises a base, and supports are fixedly mounted at two ends of the top of the base. When the service life of the cutter needs to be tested or the performance of the cutter needs to be tested, an object to be tested is placed between the two fixing blocks, then the two rotary knobs I are rotated in sequence, so that the object to be tested is clamped and fixed, then the air cylinder II is operated, and the hardness testing head is driven to move longitudinally by the air cylinder II to test the hardness of the cutter. Meanwhile, the rotating motor is operated, rotation of the cutter is achieved, the cutter grinds and cuts the tested object, performance testing of the cutter is achieved, the service life of the cutter can be calculated through multiple times of grinding and cutting of the cutter and the tested object, and convenience is brought to research, development and testing of the cutter.

The invention provides a multi-hob rotary conical surface rock breaking test device and method, and relates to the hob cutting technology, the multi-hob rotary conical surface rock breaking test device comprises a shaping structure, a trowelling structure and a cutterhead structure, the cutterhead structure is used for containing concrete, the trowelling structure is provided with a rotary lifting assembly and a scraper, and the horizontal angle of the scraper is variable; the rotary lifting assembly drives the scraper to rotate, so that the upper surface of concrete is stricken to form a conical surface, the cutterhead structure is provided with a hobbing cutter with a variable hobbing cutter inclination angle, and the cutterhead structure and the concrete can rotate relatively, so that rotary conical surface rock breaking of the hobbing cutter is simulated; according to the multi-hob conical surface rock breaking test device, manufacturing of the conical surface rock surface and adjustment of the positions and angles of the hobs are integrated in one device, a multi-hob conical surface rock breaking test can be achieved, the cone angle of the rock surface, the angles of the hobs and the distance between the hobs can be flexibly adjusted before the test, and the multi-hob conical surface rock breaking test device is used for exploring rock breaking performance under different test conditions. In addition, the inclination angle of the hob can be flexibly adjusted, and the adjusting range is larger.

The invention discloses a shearing performance testing machine for lithium battery pruning shears, and particularly relates to the technical field of testing equipment.The shearing performance testing machine comprises four supporting legs, the upper ends of the four supporting legs are jointly and fixedly connected with a working mechanism, a fixing mechanism is arranged on the left side of the working mechanism, and a testing mechanism is arranged on the right side of the working mechanism; a control center is arranged on the front portion of the right side of the working mechanism, and a second motor is arranged on the lower portion of the right side of the working mechanism. According to the shearing performance testing machine for the lithium battery pruning shears, through cooperative use of the knob part, the screw rod part, the sliding seat and the belt, different types of lithium battery pruning shears can be fixed by the clamping plates; when the stretching group controls the lithium battery pruning shears of different types to be started for shearing, the lifting group and the testing mechanism are matched with the control center, the shearing time and the maximum shearing diameter of the lithium battery pruning shears are displayed, and the shearing performance of the lithium battery pruning shears is tested together with the shearing flatness of the shearing column. And the shearing performance of the lithium battery pruning shears can be detected more accurately.

The invention belongs to the technical field of surgical instrument detection, and discloses a surgical instrument detection device. The surgical instrument detection device comprises a base, a driving mechanism, a positioning mechanism and a detection mechanism, a clamping mechanism used for clamping a sample is arranged on the base, the driving mechanism can drive the positioning mechanism to get close to or get away from the sample clamped by the clamping mechanism in the preset direction, and the positioning mechanism can position a surgical instrument; the angle between the surgical instrument and the surface of the sample can be adjusted, the surgical instrument can rotate around a first axis, and the contact point of the surgical instrument and the sample coincides with the first axis when the surgical instrument abuts against the sample; the detection mechanism is configured to detect the pressure of the surgical instrument acting on the sample. According to the surgical instrument detection device, the cutting force of the cutting instrument can be detected at different angles and different pressures, the sharpness of the cutting instrument and the sharpness of the puncture instrument can be detected at different angles, the detection requirements of various surgical instruments are met, and finally the production cost can be reduced.

The invention belongs to the field of tool testing, and particularly relates to a wear resistance detection device for cutting tool production, the wear resistance detection device comprises a bottom plate, support columns are fixedly connected to positions, close to four corners, of the bottom of the bottom plate, and a slide rail is fixedly connected to the surface of the bottom plate; a pressing plate penetrates through the surface of a clamping column and is clamped to the top of a blade, a bolt penetrates through the pressing plate and is installed in a bottom block in a threaded mode to fix the blade, and the stability of the device during installation is improved; the position, close to an eccentric shaft, of the surface of a rotating disc is rotationally connected with one end of a connecting rod, and the other end of the connecting rod is rotationally connected with a base; therefore, the bottom block slides back and forth in the sliding rail through the sliding groove, the function of simulating cutting abrasion of a cutter is achieved, the adaptability of the device is improved, the pressure of the grinding plate on a blade is adjusted by rotating a nut at the position of a threaded column and adjusting the supporting force of a spring on the grinding plate, and the machining precision is improved. The loss speed of the blade under different pressure conditions can be conveniently tested, and the adaptability of the device is further improved.

The application discloses a kind of full life cycle quality monitoring systems of numerical control cutter, including cutter performance evaluation module, cutter factory quality detection module and cutter state monitoring module;The cutter performance evaluation module includes cutting force evaluation module, machining quality evaluation module, life evaluation module and stability evaluation module;The cutter state monitoring module includes data acquisition and transmission module, data preprocessing module, wear prediction model training module and state monitoring module.The application can find problems in time in each link of cutter production and use, and can find cutter with manufacturing defects in time in the process of cutter manufacturing.In the use process of cutter, dullness, chipping and other conditions of cutter can be found in time, to eliminate the security risks caused by it, and improve the quality of product.The application integrates the data generated in each link into database, maximizes the utilization rate of data in each link, and reduces the waste of useful data.

The invention discloses a cutter sharpness testing method and device, and the device comprises a servo motor which is used for providing a driving force; the screw transmission mechanism is connected with the servo motor and is used for converting the rotary motion of the servo motor into linear motion; the sliding seat transmission mechanism is connected with the screw rod transmission mechanism and the cutter and is used for driving the cutter to move along a straight line under the action of the screw rod transmission mechanism; the force signal acquisition unit is used for acquiring a force signal in the material cutting process of the cutter in real time; the programmable logic controller is used for controlling the motion state of the cutter; the upper computer data processing unit is connected with the force signal acquisition unit and is used for receiving and storing the force signal and generating a force-time curve and a power-time curve; and the cutter fixing mechanism is connected with the sliding seat transmission mechanism and is used for fixing a cutter.

The invention discloses a method for evaluating the machinability of sulfur-containing free-cutting steel. The method comprises the following steps: (1) testing the hardness of a section; (2) assigning hardness test data; (3) grade evaluation of sulfide inclusions; and (4) comprehensive assignment calculation is conducted, specifically, the product of the hardness absolute value grade assignment, the hardness standard deviation grade assignment and the sulfide inclusion grade assignment serves as the comprehensive assignment, the turning performance of the materials is sequenced according to the comprehensive assignment, and the smaller the comprehensive assignment is, the easier machining is. According to the evaluation method disclosed by the invention, before the sulfur-containing free-cutting cold-drawing bar is cut, the machinability of the bar is visually evaluated by detecting the hardness, the uniformity of the hardness and the distribution pattern of non-metallic inclusions and through assignment calculation, so that bar processing enterprises can be helped to estimate the processing efficiency and calculate the cost, and the processing efficiency of the bars is improved. And a guiding effect is achieved on enterprise production and operation.

The invention belongs to the technical field of wood and bamboo abrasive belt grinding, and discloses an abrasive belt service life evaluation method and system for wood and bamboo mechanical grinding, an abrasive belt sample belt is controlled to grind a wood and bamboo workpiece according to specified grinding parameters, and at least one group of surface roughness parameters of the abrasive belt sample belt are obtained; and determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idle power of the driving roller, so as to comprehensively evaluate the extended meter number of the abrasive belt sample belt under the specified grinding parameters by adopting double indexes of the grinding power and the abrasive belt surface roughness parameter. The method is suitable for judging the conditions of uniform abrasion and severe abrasion of the abrasive belt, the whole measurement process is simple and convenient, the accuracy of the service life evaluation result of the abrasive belt is guaranteed, waste caused by unreasonable abrasive belt model selection can be effectively avoided, powerful support is provided for grinding process optimization and cost control in actual production, and important significance is brought to industry development.

This invention discloses a method and device for measuring the sharpness of a disc cutter. The method calculates the cutting attenuation coefficient of the disc cutter's edge by recording the small wedge angle radius before and after cutting the material. It also establishes curves showing the change in force and time experienced by the disc cutter as it moves along the X and Y axes while cutting the material, dividing the cutting process into three stages. The sharpness of the disc cutter is then calculated based on the work done by the disc cutter in each stage, the small wedge angle radius before and after cutting, the cutting time, the cutting length, and the hardness of the material. Compared to traditional static cutting tests, this dynamic cutting test method can more accurately obtain the sharpness of the disc cutter.

The utility model discloses an anastomat cutting knife detection device which comprises a vertical driving assembly, a transverse driving assembly, a cutting knife testing assembly and a suture line clamp, the cutting knife testing assembly comprises a pressure sensor and a connector unit used for installing an anastomat cutting knife, and the connector unit is assembled at the lifting end of the vertical driving assembly. The suture line clamp comprises a balancing weight, a plurality of threading columns for a suture line to penetrate through and a pressing driver for pressing the suture line, and the transverse driving assembly drives the suture line clamp to move, so that one threading column corresponds to the connector unit; the vertical driving assembly drives the anastomat cutting knife on the connector unit to cut the suture line on the suture line clamp, and the cutting force borne by the anastomat cutting knife is measured through the pressure sensor, so that a manual detection mode can be replaced, and the sharpness performance of the anastomat cutting knife can be accurately, conveniently and reliably detected.

The invention provides alloy blade measuring equipment and a measuring method, the alloy blade measuring equipment comprises a friction mark device used for positioning the deformation protruding position of an alloy blade and a mobile measuring device used for detecting the deformation amount of the alloy blade, and the alloy blade is attached to the friction mark device to rotate and highlights a friction mark. A plurality of identification point positions are distributed on the alloy blade along the friction mark in an outward expanding manner; the mobile measuring device comprises a positioning frame group, a measuring frame assembled on the positioning frame group in a sliding manner, and a measuring assembly assembled on the measuring frame in a sliding manner. According to the method and the device, data acquisition is carried out on the friction impression in multiple directions by taking the identification point position as a base point through the measurement assembly, complete deformation data is obtained, and accurate data support is provided; in addition, the invention further provides a measuring method of the alloy blade, and by means of the method, the qualified rate of finished products can be increased, cost is reduced, and efficiency is improved by collecting data and appointing the product improvement direction and the process route.

According to the PDC drill bit cutting tooth rock breaking test device, a test container serves as a core bearing structure, a pressure control system is communicated with the test container, pressurization, pressure relief and pressure stabilization can be conducted on the interior of the container, confining pressure environments of different depths underground are simulated, the stability and adjustability of pressure conditions in the test process are ensured, and the test efficiency is improved. The bit pressure loading system is fixed in the test container, is connected with a drill bit and can apply force loading and displacement loading to the drill bit at the same time and simulate dynamic mechanical behaviors in the actual drilling process, and the rock sample rotation driving system is fixed in the test container, drives a rock sample to rotate and simulates relative movement when the drill bit cuts rock. The heating system is communicated with the test container, the underground high-temperature environment is simulated through heating, cooling, oil injection and oil discharge of heat conduction oil, the temperature uniformity and stability are ensured, the rock cutting process of the PDC drill bit can be simulated more truly under the high-temperature and high-pressure conditions, and the accuracy of test data is improved.

The utility model provides a coupling confining pressure loading abrasive jet assisted TBM (Tunnel Boring Machine) rock breaking test device, which comprises: an abrasive jet mechanism, the abrasive jet mechanism comprises a pressurizing part, the pressurizing part is connected with a slurry supply part, and the pressurizing part is connected with a jet nozzle; the confining pressure loading mechanism is internally provided with a loading seat, and a rock sample is placed on the loading seat; and the hobbing cutter penetration mechanism is mounted on the confining pressure loading mechanism. By additionally arranging the abrasive jet mechanism, the TBM rock breaking test under the assistance of abrasive jet can be realized; and by arranging the confining pressure loading mechanism, the confining pressure applied to the periphery of the rock sample can be adjusted, and then the influence on the abrasive jet assisted TBM rock breaking test under different confining pressure conditions is studied.

This invention provides a PDC single-tooth rock-breaking experimental device and a method for analyzing the rock-breaking mechanism. The experimental device includes a rock-breaking device body, a PDC tooth cutting depth adjustment mechanism, a cutting speed adjustment mechanism, and a cutting force measurement mechanism. The cutting speed adjustment mechanism can adjust the cutting speed of the rock sample; the rock-breaking device body is used to fix and install the cutting depth adjustment mechanism; the cutting depth adjustment mechanism can clamp the PDC tooth and precisely control its inclination angle and cutting depth; the cutting force measurement mechanism can monitor the cutting force on the rock sample. The method includes the following steps: setting parameters such as cutting depth, cutting speed, and inclination angle; monitoring the cutting force and recording the dynamic rock crushing process; sieving and collecting rock fragments, determining the mass fraction of different groups of rock fragments, and preliminarily determining the ductile-brittle crushing mode of the rock based on the distribution pattern of the rock fragments. This invention has the advantages of precisely controlling the cutting depth, PDC tooth inclination angle, and cutting speed.

The present invention discloses a high-speed orthogonal cutting experimental device and experimental method based on secondary impact technology, comprising a power system, a launching mechanism, a cutting mechanism and a high-speed camera; the launching mechanism and the cutting mechanism are coaxially arranged; the launching mechanism comprises a launching tube, a base and a guide rail fixedly connected in sequence; a guide rod is installed on the guide rail, and a workpiece to be processed is fixed on the guide rod; the cutting mechanism comprises two symmetrically arranged cutting parts, the cutting part comprises a tool clamp, a tool, a force sensor and a slide; the tool is installed on the tool clamp, the tool clamp and the force sensor, and the force sensor is installed on the slide; the power system is used to provide kinetic energy for the guide rod in the launching mechanism, the guide rod and the workpiece to be processed are fixed to drive the workpiece to be processed to move, and the guide rod is installed at the exit position of the launching tube. When cutting, the workpiece only needs to move from the exit of the launching tube to the tool, and does not need to move in the launching tube, thereby avoiding the trajectory uncertainty caused by the movement of the workpiece in the long launching tube.

The present invention provides a cutting force prediction method, system, equipment and medium for ultra-precision machining of titanium alloys. The method uses a diamond tool to perform scraping experiments on titanium alloy workpieces at different cutting depths, obtains the springback corresponding to different cutting depths, and establishes a springback force prediction model. The prefabricated titanium alloy thin-walled workpiece is subjected to turning force measurement experiments at different cutting depths to obtain the corresponding main cutting force and thrust and establish a shear force prediction model. The cutting force prediction model is then obtained according to the cutting force calculation formula determined by the ultra-precision turning system structure as well as the springback force prediction model and the shear force prediction model. The method also substitutes the cutting depth and width of the thin-walled workpiece obtained by discretizing the cutting area of ​​the titanium alloy workpiece to be processed into the cutting force prediction model to obtain a discretized cutting force prediction model. The method can efficiently and accurately predict the cutting force, is easy to be integrated into an intelligent cutting system, improves machining accuracy, reduces tool wear, and has high application value.

The invention relates to a rock breaking device for simulating the motion trail of a hobbing cutter, and belongs to the technical field of rock breaking, the rock breaking device comprises a drilling machine frame, and a rotary power unit and a drilling rod assembly which are arranged on the drilling machine frame, and the drilling rod assembly comprises two adjusting supports which are arranged at the ends of output shafts of the rotary power unit respectively; one end of each adjusting support is hinged to an output shaft of the rotary power unit, the two tool bases are arranged at the other ends of the two adjusting supports in a one-to-one correspondence mode, and a plurality of inserted teeth are fixedly arranged at the bottoms of the tool bases. And then the rotary power unit on the drilling machine frame is used for driving the inserted teeth to move to break rocks, so that the rock breaking effects of the whole hobbing cutter of different types under various working conditions are simulated by using a limited number of inserted teeth movement tracks, and compared with a full-size hobbing cutter, the large load does not need to be provided, a plurality of full-size hobbing cutters do not need to be machined, and the machining efficiency is improved. Therefore, the cost of the hob rock breaking test is reduced.

The utility model provides a pneumatic tool for a cutting experiment, which comprises an angle grinder which comprises an angle grinder body, a handle and a transmission mechanism extending out of the bottom of the angle grinder body; the fixing ring is arranged on the outer side of the transmission mechanism in a sleeving manner; the fixing plate is mounted below the fixing ring through the fixing ring; the cam is arranged below the fixed plate and is connected with the transmission mechanism; the cam follower, the blade mounting plate and the blade are sequentially connected with the cam; under the driving of the transmission mechanism, the cam rotates, and then the blade is driven to do reciprocating cutting motion. According to the utility model, the structure of a common pneumatic tool is modified, the interaction effect between a blade and a cut object during manual cutting of an operator is simulated, huge physical output caused by manual cutting is avoided, and even the glue separation work between the inner and outer plates of the vehicle door can be completed by only one operator; and the working efficiency is greatly improved, and the labor cost is reduced.

An apparatus for testing the sharpness of a cutting edge of a blade by cutting a test body includes at least: first support means adapted to support said blade, second support means adapted to support said test body, said first and second support means being arranged and configured so that said test body lies on the cutting edge of said blade, displacing means adapted to carry out a relative sliding between said blade and said test body along said cutting edge with the simultaneous application of a cutting force on the cutting edge of said blade adapted to perform a cut on said test body, first detection means adapted to instantaneously detect a cutting force, and second detection means adapted to instantaneously detect the depth of the cut performed in the test body.

A real-time calibration-based tool condition monitoring system, device and method for repetitive machining operations to monitor tool conditions by a combination of a calibration procedure using a reference tool and similarity analysis comparing the reference tool with a working tool is disclosed.

The invention discloses a rock breaking tunneling detection device based on water jet cutting, and relates to the technical field of on-site rock hardness detection, and the rock breaking tunneling detection device comprises a limiting unit which comprises a vertical fixing assembly, a guide assembly and a horizontal fixing assembly; the drill bit tunneling unit comprises a mounting box, a first air cylinder and a drill bit assembly. The device has the beneficial effects that through efficient cooperative operation of the water jet cutter cutting unit and the drill bit tunneling unit, a water jet cutter is used for cutting the rock surface in advance to form a groove so as to break stress distribution, the water pressure and drill bit parameters are dynamically adjusted by combining a feedback mechanism of the cutting depth and the drilling effect, and the drilling efficiency can be improved under the condition that the drill bit is not replaced on site. The rock hardness data is obtained, then the proper drill bit type is selected, and the problem that the detection efficiency is reduced due to the fact that the drill bits are frequently replaced in field detection is solved.

The application discloses an ultrasonic straight blade sharpness detection device and a detection method thereof. The ultrasonic straight blade sharpness detection device comprises a machine table, a tool clamping tool, a wire clamping device, a force measuring device and a control terminal. The tool clamping tool is arranged on the machine table and is provided with an ultrasonic loading unit for clamping the ultrasonic straight blade to be detected and making the ultrasonic straight blade to be detected vibrate under the action of ultrasonic waves. The wire clamping device is installed on the machine table and below the blade of the ultrasonic straight blade to be detected for fixing the test wire. The force measuring device is arranged at the bottom of the wire clamping device and is used for detecting the cutting force of the cut test wire. The control terminal is signal connected with the force measuring device and is used for determining the sharpness of the ultrasonic straight blade to be detected according to the cutting force. The application provides an ultrasonic straight blade sharpness detection device, realizes the measurement of the sharpness of the cutting blade of the ultrasonic straight blade, improves the accuracy of the test result, and more truly reflects the sharpness of the ultrasonic straight blade.