55 results about "Drilling force" patented technology

The invention discloses a movable deep-sea large-depth rock core sampling drilling machine, and relates to the technical field of rock core sampling, the movable deep-sea large-depth rock core sampling drilling machine comprises a main machine and a drilling unit assembled at the front end of the main machine, and the drilling unit is used for executing drilling operation; the multiple drill rod drilling tools are arranged on the main machine in a stacked mode, and a conveying unit used for conveying the drill rod drilling tools to the front end is arranged on the main machine; the drill rod processing arm is arranged on the drilling unit in a sliding manner; comprising an output motor. According to the movable deep-sea large-depth core sampling drilling machine, the drilling machine stretching arm is driven to stretch and contract in the horizontal direction so as to drive the drilling unit to incline forwards or swing backwards along the rotating shaft, so that the drilling unit is deflected to a proper angle and is nearly perpendicular to the drilling ground, and it is guaranteed that drilling force is stable; and the bearing-feeding action is completed through the arrangement of the drill rod processing arm, so that the replacement of the drill rod and the drill tool is simpler.

The application discloses a bone drilling force prediction method based on CT and drilling working conditions, which comprises the following steps: step 1, extracting the contact surface image sequence of the drill bit and the bone tissue on the bone drilling path from the CT image and performing pretreatment; step 2, inputting the pretreated contact surface image and the drilling working condition parameters into a multi-physical factor fusion module to obtain an image sequence of the fused working condition physical information; step 3, inputting the image of the fused working condition physical information into an image coding network to extract the drilling force features in the section; and step 4, inputting the sequence composed of the drilling force features of all sections on the drilling path into a sequence regression network ATP-UNeXt to obtain the prediction of the drill bit stress sequence on the drilling path. The application has the advantages that the drilling force related physical factors can be comprehensively considered, more accurate preoperative stress prediction can be provided, the model reasoning speed is fast, the application is suitable for a clinical operation auxiliary system, and the cost of the operation auxiliary system is reduced.

The invention relates to the technical field of shaft machining, in particular to an automobile gear shifting shaft and a machining method thereof. A plurality of radial holes need to be machined in a shaft body of the gear shifting shaft, and a specific angle relation exists between the axes of the holes. The core machining method is implemented on the basis of a turning and milling composite machine tool and mainly comprises the three stages that firstly, the clamping state of the gear shifting shaft is synchronously detected through multiple sensors, data fusion analysis is conducted through a central processing unit, and an execution mechanism is driven to conduct cooperative correction on a chuck so as to optimize the clamping precision; secondly, performing pre-compensation calculation based on a target angle, a pre-calibration parameter and a residual deviation during indexing positioning, and performing real-time compensation on an indexing error by utilizing a micro-motion mechanism; and finally, in the drilling process, a self-adaptive tool path is generated by scanning the curved surface to be machined, the drilling force and the tool state are monitored in real time, and machining parameters are dynamically adjusted to restrain drill bit deviation. According to the invention, high-precision and self-adaptive processing of the complex angle hole series is realized.

The invention discloses a bone drilling force prediction method based on CT and drilling working conditions. The bone drilling force prediction method comprises the following steps that 1, a contact surface image sequence of a drill bit and bone tissue on a bone drilling path is extracted from a CT image and preprocessed; step 2, inputting the preprocessed contact surface image and drilling working condition parameters into a multi-physical factor fusion module to obtain an image sequence fused with working condition physical information; 3, inputting the image fused with the physical information of the working condition into an image coding network, and extracting drilling force characteristics in a tangent plane; and step 4, inputting a sequence formed by the drilling force characteristics of all sections on the drilling path into the sequence regression network ATP-UNeXt to obtain prediction of a drill bit stress sequence on the drilling path. The method has the advantages that physical factors related to the drilling force can be comprehensively considered, more accurate preoperative stress prediction is provided, the model reasoning speed is high, the method is suitable for a clinical operation auxiliary system, and the cost of the operation auxiliary system is reduced.

The application discloses a kind of laser-assisted drilling rock breaking intelligent control system and method, comprising: perception module, for obtaining the state information of each component of laser drill, tunneling parameter and drill drilling force;Decision module is used to determine whether the operation of laser drill is normal according to the state information of each component of laser drill, determine the surrounding rock grade under the current tunneling state according to tunneling parameter, and determine the drilling pressure difference between each drill tooth according to drill drilling force, and determine whether the drilling direction of drill is deviated by the drilling direction deviation occurrence threshold value;Execution module is used to determine whether to issue alarm and close laser drill according to the operation of laser drill determination result, select to start corresponding drilling mode according to surrounding rock grade, and adjust laser beam exit angle according to the drilling direction of drill determination result.Advantages: improve tunneling efficiency, ensure drilling stability and safety.

The utility model discloses a novel anchoring part which comprises a nail head and a nail rod installed at the bottom of the nail head, thread self-tapping teeth are arranged on the surface of the nail rod, a pluggable installation block is arranged on the top of the nail head, the novel anchoring part further comprises two positioning grooves, the number of the positioning grooves is two, and the positioning grooves are formed in the left side and the right side of the top of the nail head respectively. A positioning block is installed at the position, corresponding to the positioning groove, of the bottom of the installation block. Through mutual cooperation of the mounting block, the positioning groove, the positioning block, the clamping block, the clamping groove, the fixing groove, an adjusting block, an inserting block, an inserting groove, a reinforcing rod, a reinforcing groove, a buffer spring and a pushing block, an inner hexagonal hole or a cross-shaped hole can be selected for the anchoring part according to needs, when the inner hexagonal hole is used, the mounting block can be detached from the nail head, and therefore the anchoring part is convenient to use. And meanwhile, the stability when the mounting block and the nail head are connected and mounted can be guaranteed, glue and cement sand are poured into the pouring cavity through the through opening, and therefore the drilling force of the nail rod is further improved.

The invention discloses a drilling force calculation method based on a unit cutter linear synthesis method and transfer learning, which comprises the following steps of: firstly, dividing a drilling cutter into a plurality of unit cutters by adopting the unit cutter linear synthesis method, and calculating and synthesizing the cutting force on each unit cutter to obtain the cutting force on a whole drilling edge; on the basis, an existing drilling force calculation neural network model is migrated to a new drilling task by utilizing a migration learning technology, and rapid and accurate calculation of the drilling force is realized by finely adjusting the weight of the model. According to the method, the accuracy of a unit tool linear synthesis method and the high efficiency of transfer learning are combined, the influence of multiple factors such as the geometrical shape of the twist drill and the workpiece material can be fully considered, and the accuracy and reliability of drilling force calculation are improved; the method has a wide application prospect in machining, can be used for optimizing cutting parameters and improving the machining efficiency and the workpiece quality, and provides effective reference and guidance for machining personnel.

The present invention belongs to the technical field of oil drilling, and particularly relates to a full-metal positive-displacement downhole motor. The adopted technical solution includes a connecting sleeve, a connecting rod valve, a limiting ball, a limiting cover, a chuck, a piston, a right-handed worm, a housing, a flat thrust ball bearing, a left-handed worm, a series bearing, a one-way shaft, an upper end cover, an upper one-way bearing, a lower one-way bearing, a connecting shaft, a spring, a lower sub, an axial limiting bearing, and a lower end cover. The connecting rod valve, the chuck and the piston cooperate to control the drilling fluid to push the double worms to move axially and circumferentially along the spiral internal teeth on the inner surface of the housing, and the generated rotation is transmitted to the drill bit through the one-way bearing. When moving to the lower limit position, the chuck and the piston control the drilling fluid to release pressure, and the reaction force of the spring causes the whole to reset. The present invention provides a full-metal positive-displacement downhole motor, which is applied to the exploration of high-temperature and high-pressure deep wells, has strong drilling force, high reliability, and strong applicability.

The application provides a kind of robot-assisted kirschner wire bone drilling mechanics model construction method, comprising: analyzing the process of robot-assisted kirschner wire bone drilling, obtaining the geometric model of mechanical analysis of robot-assisted kirschner wire bone drilling;According to the geometric model of mechanical analysis, a kind of finite element analysis model of robot-assisted kirschner wire bone drilling is established, the influence law of kirschner wire rotating speed, feed speed, the relative angle between kirschner wire and bone surface on drilling force is obtained;According to the data of mechanical analysis geometric model and finite element model, a kind of mechanical model of robot-assisted kirschner wire placement is established, and the mathematical representation between drilling force and kirschner wire rotating speed, feed speed, the angle between kirschner wire and bone surface is obtained.According to the technical scheme provided by the application, the construction of the mechanical model of robot-assisted kirschner wire bone drilling can be realized.

The present invention provides a repair system for adhesives around holes and a self-repair method for damage. The system includes a numerically controlled (CNC) machine tool, a current or voltage control device, a temperature measurement system, brushes, a temperature control system, and a temperature-controlled tool. During machining, the current or voltage control device energizes the temperature control system, which controls the tool temperature. Based on the technical solution of the present invention, the intelligent temperature-controlled tool can, to a certain extent, reduce the drilling force required for the material, lower the difficulty of drilling and reaming the material, significantly improve tool quality and lifespan stability, improve the efficiency of the hole-making process, expand the hole diameter, eliminate burrs, and enhance hole-making accuracy and quality.

The utility model provides a clamping and drilling deformation simulation detection system for a revolving body thin-wall part with a partition plate. The clamping and drilling deformation simulation detection system comprises a supporting part; the clamping part is arranged on the supporting part, and the workpiece is a revolving body thin-wall workpiece with a partition plate; the first pressure detection part is used for detecting the clamping force applied to the workpiece by the clamping part; a drilling simulation device; the second pressure detection part is connected to the drilling simulation device and used for detecting the pressure applied to the partition plate by the drilling simulation device; the adjusting part is used for adjusting the positions of the clamping part and the drilling simulation device relative to the workpiece; and the deformation detection part is used for detecting the clamping deformation and the drilling deformation of the workpiece. In this way, the preset clamping force and the preset drilling force can be applied to the workpiece so as to simulate actual clamping and drilling, the deformation detection part detects the actual clamping deformation and the drilling deformation of the workpiece so as to obtain the relation between the clamping force and the clamping deformation and the relation between the drilling force and the drilling deformation; and a foundation is laid for controlling deformation of the revolving body thin-wall part with the partition plate.

The utility model discloses a high-torque cave-making drill rod, which relates to the field of industrial construction equipment and comprises a drill rod main body, a hole is arranged in the drill rod main body, a plurality of thread grooves are arranged on the inner wall of the hole, an internal rotation drill rod matched with the thread grooves is arranged in the hole, and a sampling device is arranged at the bottom of the internal rotation drill rod. The sampling device comprises a drilling bit, the drilling bit is connected with an internal rotation drilling rod, and a pair of guiding and collecting plates are symmetrically arranged on the two sides of the drilling bit. According to the utility model, the thread design is innovated and improved through the thread mechanics principle, so that the drilling force of the internal rotation drill rod is obviously enhanced, rock breaking and caving can be easily carried out in complex stratums such as hard rocks, the drilling efficiency and quality are effectively improved, and various complex mining operation requirements are met; and meanwhile, redundant geological materials during hole drilling are collected through the arranged sampling device, so that the materials are conveniently analyzed, and subsequent hole drilling operation is facilitated.

The invention discloses a geological water conservancy project environment ecological restoration device, and particularly relates to the technical field of soil remediation. By arranging a longitudinal soil drilling adjusting unit, when the restoration width is large, two limiting frames are away from each other at the same time and slide in a transfer frame in a limited mode, and then two guide frames descend synchronously; then the soil drilling rod is driven to slide downwards by a specific height along the limiting frame, drilling is conducted on soil at different depths, and hard soil is loosened; when the repairing width is small, the two limiting frames get close synchronously to drive the soil drilling rods in the limiting frames to get close, the drilling width is small, the pollution layer with the specific depth is treated through accurate drilling and screening, the unpolluted soil layer below is prevented from being damaged, meanwhile, the same drilling force is applied to soil at different points, the consistency of the soil loosening effect is guaranteed, and the repairing efficiency is improved. In this way, the physical boundary of drilling operation is delimited, it is ensured that the soil drilling rod does not exceed the preset repairing area, and interference on a non-target area is achieved.

The invention relates to the field of geotechnical engineering investigation, and discloses a real-time working condition judgment and depth acquisition method based on drilling parameters. According to the method, a drilling parameter sensor is additionally arranged on a drilling machine and used for collecting parameters such as displacement, drilling speed and drilling force of an active drill rod in real time; by calculating the displacement difference of the power head and combining the displacement critical value, the drilling speed and the drilling force, the up-down moving state of the drill rod is judged, and therefore the working conditions of rotary drilling, rotary lifting, pipe screwing, pipe unloading, empty releasing, empty lifting, lowering with the rod, hovering static, hovering idling and the like are distinguished; a depth updating rule is set according to different working conditions, the drilling depth is corrected under the working condition that substantial influence is generated on the position of the drill bit, and the depth is kept unchanged under other working conditions. By means of the method, the real-time monitoring and drilling depth of drilling construction can be accurately obtained, the authenticity and reliability of exploration results are improved, and meanwhile data support is provided for researching the relation between drilling parameters and stratum soil.

The present invention discloses a drilling force prediction method based on Chladni figures. The method uses Chladni figures to characterize the drilling vibration of a composite material with unidirectional carbon fibers, obtains the frequency of the self-excited vibration of the workpiece, and then calculates the dynamic cutting force coefficient under the influence of the drilling vibration. During the dynamic cutting process, the dynamic cutting force is predicted based on the dynamic cutting force coefficient, tool rotational speed, tool feed rate, and cutting area at the feed time. By predicting changes in cutting force, the present invention can avoid machining vibration caused by drastic fluctuations in cutting force, thereby reducing the risk of tool breakage and workpiece surface defects. It can also help adjust cutting parameters to maintain the stability of the cutting process, thereby improving machining accuracy and surface quality.

The application discloses a self-centering three-blade superhard micro drill and belongs to the technical field of mechanical machining. The drill tip comprises a main cutting edge, a relief intersection line, a relief surface and a drill core tip. The inner surface of the spiral groove intersects with the relief surface to form an arc-shaped main cutting edge. Three relief intersection lines are formed by the intersection of two relief surfaces. The three relief intersection lines intersect to form the drill core tip. The self-centering three-blade superhard micro drill provided by the application adopts a polyhedral drill tip structure instead of a horizontal blade structure. The main cutting edge adopts three symmetrical cutting edges. According to the material type, the spiral groove adopts a small spiral angle shallow groove structure or a large spiral angle deep groove structure. The tool has good self-centering performance, fine chip and chip removal effects, can effectively reduce the axial drilling force on the unit cutting edge length in the drilling process, improves the bending resistance and wear resistance of the tool, and is suitable for high-quality and high-efficiency machining of micro holes.

The invention relates to an automatic drilling and sampling method and system of a spiral drilling tool for uncertain lunar surface working conditions, and belongs to the field of deep space exploration. According to the method, for a deep complex lunar soil profile, on the basis of sensing parameters, such as drilling force load, drilling torque and drilling temperature rise, of the action of a drilling tool and lunar soil in the drilling process, dynamic sensing of the lunar soil profile is conducted, the working state of the lunar soil profile is analyzed, a genetic algorithm is adopted for training the drilling parameters, an intelligent drilling strategy is autonomously formed, and intelligent drilling is achieved.

The invention discloses an ultrasonic-assisted titanium alloy continuous drilling method based on heat accumulation utilization, belongs to the technical field of titanium alloy material drilling machining, and aims at solving the problem that existing titanium alloy material continuous drilling still needs large drilling force. The heat transfer radius of a workpiece is calculated, the radius of a heat affected zone of the workpiece is detected, a drilling strategy is determined according to the heat transfer radius and the radius of the heat affected zone, when the distance between to-be-drilled holes is large, heat accumulation is increased in a process hole drilling mode, the to-be-drilled holes are drilled after the heat accumulation amount is increased, and the machining strategy is dynamically adjusted through the real-time temperature of the drilling area of the workpiece. Through tests, according to ultrasonic vibration auxiliary drilling capable of actively managing heat, the drilling force is remarkably reduced under different machining parameters, and compared with traditional ultrasonic vibration auxiliary drilling with a heat dissipation strengthening thought, the maximum reduction amplitude reaches 19.7%. And the abrasion of the cutter can be reduced.

The utility model discloses a special tool for a carbon fiber bearing seat machining center, which comprises a machining platform, a limiting baffle and a drilling mechanism are respectively arranged on side supports on the left side and the right side of the machining platform, a hot working bottom plate is arranged on the upper surface of the machining platform, and an electric heating pipe arranged in a lug is arranged in the hot working bottom plate. Two rows of vertical heat conduction columns are uniformly distributed on the electric heating pipe, so that the temperature generated by the operation of the electric heating pipe is conducted to a heat conduction rubber block through the heat conduction columns, and the heat conduction rubber block conducts heat to the bearing seat, so that the bearing seat bears the drilling acting force generated by the drilling mechanism in the heating process; the layering resistance of the carbon fibers is improved by increasing the temperature of the carbon fibers, the problem that the carbon fiber bearing seat is layered under the drilling acting force is solved, the machining reject ratio of the carbon fiber bearing seat is reduced, and the machining efficiency of the carbon fiber bearing seat is improved.

The invention relates to the technical field of automobile part drilling, and particularly provides an automatic automobile part drilling machining device which comprises a workbench, a bearing plate, a drilling mechanism, an outer clamping mechanism, an inner supporting clamping mechanism and a bearing reinforcing mechanism. Through cooperation of the inner supporting and clamping mechanism and the outer clamping mechanism, when the bearing plate drives the hub to move upwards, the hub is automatically centered, positioned and clamped inside and outside at the same time, and the accuracy of the hub drilling position and the stability in the drilling process are greatly improved; after the bearing plate moves upwards by a certain height, the bearing and reinforcing mechanism carries out bearing and reinforcing on the bottom of the bearing plate, and the state of the hub clamped by the outer clamping mechanism and the inner supporting and clamping mechanism is locked through the locking assembly, so that the bearing and reinforcing mechanism can carry out bearing and reinforcing on the bearing plate; and the situation that when the hub is drilled, the bearing force of the bearing plate is insufficient under the impact effect of drilling force, and the drilling quality of the hub is affected is prevented.

The present application belongs to the field of underground engineering drilling, and provides a jet flow intelligent deviation correction control system and method for a deep hole drilling machine. The jet flow intelligent deviation correction control system comprises a drill bit sensing module, a deviation correction decision module and an angle adjustment module. The drill bit sensing module is used to obtain the reaction force received by each part of the drill bit rock breaking section in real time, obtain a drilling force-time curve, and then match the corresponding relationship between the drilling force at different times and the drill bit rock breaking section position. The deviation correction decision module is used to calculate a drilling deflection factor, and then judge whether the drill bit has a deflection trend according to the comparison result of the drilling deflection factor and a deflection threshold. The angle adjustment module is used to adjust the exit angle of the water jet flow beam according to the drill bit deflection trend judgment result until the drill bit has no deflection trend, and finally realize long-distance collimation drilling along the predetermined direction. The system can intelligently control the drilling deviation in real time according to the intensity difference, solve the problem of drilling deflection of the deep hole drilling machine, and improve the long-distance drilling precision.

The invention provides a mechanical model construction method for robot-assisted kirschner wire bone drilling, which comprises the following steps: analyzing a robot-assisted kirschner wire bone drilling process to obtain a mechanical analysis geometric model for robot-assisted kirschner wire bone drilling; according to a mechanical analysis geometric model, a finite element analysis model for robot-assisted Kirschner wire bone drilling is established, and the influence rule of the Kirschner wire rotating speed, the Kirschner wire feeding speed and the relative angle of the Kirschner wire and the bone surface on the drilling force is obtained; according to a mechanical analysis geometric model and finite element model data, a mechanical model for robot-assisted kirschner wire placement is established, and mathematical representations between drilling force and the rotating speed and the feeding speed of the kirschner wire and between the kirschner wire and the bone surface angle are obtained. According to the technical scheme provided by the invention, the construction of the mechanical model of the robot-assisted kirschner wire bone drilling can be realized.

The invention relates to the technical field of micropore processing, in particular to a high-frequency hard core substrate deep micropore processing method which comprises the following steps: providing a high-frequency hard core substrate to be processed, and fixing the high-frequency hard core substrate on a workbench; providing solid-phase lubricating particles, and mixing the solid-phase lubricating particles with airflow of which the pressure intensity is greater than 0.8 MPa to form a solid-phase minimal quantity lubricating medium; when an ultrasonic vibration drill bit moves along a machining track, the solid-phase minimal quantity lubricating medium is sprayed to a target machining position, and the solid-phase minimal quantity lubricating medium is introduced into a contact area of the drill bit and a base plate and the hole wall of the formed deep micropore by means of the mechanical action of ultrasonic vibration so as to lubricate drilling forming of the deep micropore. According to the deep micropore machining method, forced cooling and dynamic permeation lubrication of a cutting area are achieved through the synergistic effect of solid-phase lubricating particles carried by high-pressure airflow and ultrasonic vibration drilling, so that drilling force and cutting heat are effectively reduced, material adhesion and layering are inhibited, and the machining quality of deep micropores is remarkably improved.

This invention discloses a method for determining the rock failure surface during drilling, comprising the following steps: 1) simulating and determining the drilling force model, and determining the relationship between the components in the model; 2) calculating the maximum shear stress at which the rock structure undergoes plastic failure; 3) determining the shape of the failure surface and the maximum shear stress τ in the shear zone determined in step 2) according to the maximum shear stress criterion. max This is related to predicting the failure surface; 4) Based on the maximum shear stress criterion, the iterative method is used to solve the force acting on the cutting surface, and the function of the failure surface is determined by inputting the basic drilling parameters, quantitatively presenting the failure surface morphology. The method of this invention introduces the Michel solution of elastoplastic mechanics to solve the stress state of the rock shear zone during drilling, and derives a specific response function of rock properties to drilling parameters based on the stress characteristics of the drill bit; referring to the maximum shear stress criterion, the shear stress of the unit body is compared with the shear strength of the rock to determine whether the rock is broken.

The invention provides a clamping and drilling deformation simulation detection system for a revolving body thin-wall part with a partition plate. The clamping and drilling deformation simulation detection system comprises a supporting part; the clamping part is arranged on the supporting part, and the workpiece is a revolving body thin-wall workpiece with a partition plate; the first pressure detection part is used for detecting the clamping force applied to the workpiece by the clamping part; a drilling simulation device; the second pressure detection part is connected to the drilling simulation device and used for detecting the pressure applied to the partition plate by the drilling simulation device; the adjusting part is used for adjusting the positions of the clamping part and the drilling simulation device relative to the workpiece; and the deformation detection part is used for detecting the clamping deformation and the drilling deformation of the workpiece. In this way, the preset clamping force and the preset drilling force can be applied to the workpiece so as to simulate actual clamping and drilling, the deformation detection part detects the actual clamping deformation and the drilling deformation of the workpiece so as to obtain the relation between the clamping force and the clamping deformation and the relation between the drilling force and the drilling deformation; and a foundation is laid for controlling deformation of the revolving body thin-wall part with the partition plate.

The present application relates to the field of micro-hole processing of hard and brittle materials, and in particular to a micro-hole processing device, method, and system. The micro-hole processing device includes: a tool assembly, which is used for vertical feed drilling, and the tool assembly includes: a power shaft, which is used to provide drilling power; a micro-needle, which is fixedly connected to the power shaft and is used to drill a workpiece; a carrier assembly, which is arranged below the tool assembly, and the carrier assembly includes: a carrier, which is used to carry the workpiece and has a degree of freedom of movement in the vertical direction relative to the tool assembly; an adjusting member, which is located below the carrier, is connected to and acts on the carrier, and can output an adjustable force Fx upward to the carrier to keep the actual drilling force F0 of the micro-needle on the workpiece constant. By dynamically adjusting the interaction force between the tool and the workpiece, the technical effect of improving the quality of micro-hole processing is achieved.

The present invention relates to the technical field of drilling holes in automobile parts, and specifically proposes an automatic drilling processing device for automobile parts, comprising a workbench, a supporting plate, a drilling mechanism, an external clamping mechanism, an internal support clamping mechanism, and a supporting and reinforcing mechanism. The present invention automatically positions and clamps the wheel hub both inside and outside at the same time when the supporting plate drives the wheel hub to move upward, through the cooperation of the internal support clamping mechanism and the external clamping mechanism, thereby greatly improving the accuracy of the wheel hub drilling position and the stability during the drilling process. Moreover, after the supporting plate moves up to a certain height, the supporting and reinforcing mechanism supports and reinforces the bottom of the supporting plate, and locks the state of the wheel hub after being clamped by the external clamping mechanism and the internal support clamping mechanism through a locking assembly, so that the supporting and reinforcing mechanism can not only support and reinforce the supporting plate, but also prevent the supporting plate from having insufficient supporting force under the impact of the drilling force when drilling the wheel hub, thereby affecting the drilling quality of the wheel hub.

The utility model relates to the technical field of drill bits, and discloses a spiral drill bit for drilling furniture, which comprises a drill rod, a chip groove and a connecting end are arranged on the drill rod, a main drill bit and a positioning drill bit are detachably mounted on the drill rod, and the positioning drill bit, the main drill bit and the drill rod are coaxially arranged. According to the utility model, the positioning drill bit is arranged to provide drilling force for the drill rod when the drill rod drills, so that the pressure applied to the drill rod by a worker is reduced or even not required; by arranging the main drill bit and the positioning drill bits which are detachably installed, a worker can replace different positioning drill bits according to the actual hardness of wood, and the lengths and the conicity of drilling parts on the different positioning drill bits and the thread pitches of thread grooves can be changed; therefore, the positioning drill bit is synchronous with the main drill bit in the drilling process; and blockage and even jamming caused by inconsistent drilling speeds of the positioning drill bit and the main drill bit are prevented.

The present invention discloses a method for calculating drilling force based on the unit tool linear synthesis method and transfer learning. The method first uses the unit tool linear synthesis method to divide the drilling tool into multiple unit tools. By calculating the cutting force on each unit tool and integrating them, the cutting force on the entire drilling edge is obtained. On this basis, the existing drilling force calculation neural network model is transferred to the new drilling task using transfer learning technology. By fine-tuning the model weights, the drilling force can be quickly and accurately calculated. This method combines the accuracy of the unit tool linear synthesis method with the efficiency of transfer learning. It can fully consider the influence of multiple factors such as the geometry of the twist drill and the workpiece material, and improve the accuracy and reliability of the drilling force calculation. This method has broad application prospects in mechanical processing and can be used to optimize cutting parameters, improve processing efficiency and workpiece quality, and provide effective reference and guidance for processing personnel.

The invention relates to the technical field of drilling machines, in particular to a mine exploration drilling machine with a calibration mechanism, which comprises a drilling rod mechanism and a vertical driving mechanism, the free end of the vertical driving mechanism is provided with a first motor, the output end of the first motor is provided with a rotating drum, a movable plate is slidably matched in the rotating drum, and the top of the movable plate is provided with a first spring; a connecting block is arranged at the bottom of the movable plate, and the bottom of the connecting block penetrates out of the rotary drum and is detachably connected with the drill rod mechanism. A first bulge and a second bulge are mounted at the bottom of the connecting block; the outer surface of the rotating cylinder is rotationally connected with an outer cylinder. In the using process, when a hard stratum is drilled, the first spring is compressed to increase the drilling pressure, and then the drilling force is improved; when the bit pressure reaches a set value, the working state of the drill bit is converted into two drilling modes of firstly rotating and impacting at the same time, then rotating for a period of time, then rotating and impacting at the same time and intermittently drilling by the drill bit, so that the drill bit is suitable for working in a harder stratum, and the drilling efficiency is improved.