176 results about "Drilling force" patented technology

PCT No. PCT / EP97 / 06020 Sec. 371 Date Apr. 30, 1999 Sec. 102(e) Date Apr. 30, 1999 PCT Filed Oct. 31, 1997 PCT Pub. No. WO98 / 18390 PCT Pub. Date May 7, 1998A surgical drill (1), comprising a rotating head (2) having a drill bit (3) suitable to bore a body (4) and support means (7) to which the head (2) is pivotally connected. An actuating unit (10) of the movement of the drill bit (3) with respect to the body to bore (4) is provided for, comprising a first support (11) comprising the head (2) and a second support (12), suitable for resting directly upon the body (4) and translating with respect to the first support (11) parallel to the drill bit (3). The movement between drill bit (3) and body (4) is caused by the relative movement between drill bit (3) and second support (12). Means (21) for the detection of the force acting on the drill bit and means for the control of the drill bit displacement in function of the drilling force are provided for. The drill, manually holdable, presents both a reference with respect to the patient body and allows a precise control of the drill bit displacement.

The invention relates to a stratum geology interface instrument drilling induction recognition system, comprising a data induction unit, a data collection unit and a data analysis unit; the monitoring of the working parameters of a drilling machine and the monitoring of drilling parameters of a drilling bit are effectively combined by the system, on one hand, by monitoring the working pressure, temperature, flushing liquid and fuel oil of the drilling machine, the real-time monitoring, fault diagnosis and control management to the working state, oil consumption and heating state and the like of the drilling machine can be realized; on the other hand, by monitoring the drilling axial stress and vibration of the drilling bit, the stress of the drilling bit is analyzed in the drilling process, and stratal mechanical judgment and classification can be carried out to the penetrated geology material according to the drilling force without sampling, soil test and indoor rock-soil mechanical property test, and 2 / 3 of sampling and drilling time can be saved; the installation is easy, the operation is simple and the recognition precision is high.

The invention relates to a water string installation method, namely, the immersed tube drilling method; a drill bit (2) is arranged at the lower end of a water string (1), the drill is connected with a power station (5) on a platform by a power hose bundle (8) in the water string (1), the water string (1) is hung on a large hook (3) of the platform drill and is lowered gradually, the rise and fall of the drilling tool and the power hose bundle (8) is realized by a cable winch (7) arranged on the platform and a hose winch (6), the drill bit (2) drills holes by the combination way of the mechanical drilling force and the water flushing force; the diameter of a drill hole (4) is greater than that of the water string (1), the water string (1) is inserted into the drill hole (4) together with the drill bit (2) until the design position is reached. The invention firstly proposes that the drill bit is arranged at the lower end of the water string and the well pipe is lowered during the drilling process, which avoids that the drill hole collapses and reduces the installation cost, and the invention is especially suitable for the addition of a small amount of new wells on the existing platform facility.

The invention discloses a cooperative interaction control system for a craniotomy robot. The cooperative interaction control system comprises a motion limiting module, a doctor-robot interaction module, a robot-patient interaction module and a solver. The motion limiting module is used for tracking the position of the robot in real time and is compared with a limited area, so that the robot is limited within a certain area for movement. The doctor-robot interaction module is used for completing real-time speed control over the robot by doctors. In the skull milling process, the robot-patient interaction module is used for keeping a certain contact force between the tail end of a milling cutter and the bottom face of a skull and further keeping a certain drilling force in the skull drilling process. The solver is used for completing inverse kinematics resolving of the robot and further used for inputting and outputting robot motion and joint motion speeds separately so as to drive the robot to move. According to the cooperative interaction control system, the advantages that the flexibility of the doctors is high and the precision of the robot is high are integrated, operation efficiency and quality can be improved while operation safety is improved, and the craniotomy fatigue degree of the doctors is lowered.

The invention discloses a designing method for a drilling cutter. The cutter at least comprises an upper-grade drill bit with the preset diameter and a lower-grade drill bit with the diameter larger than the preset diameter. The method comprises the steps of calculating the axial drilling force of the cutter according to Fa=2A*10-1.089gamma(f / 2)0.5G1, calculating the material layering critical thrust according to (img file ='DDA0000433373030000011.TIF' wi='1347' he='207' / ) ( / maths), calculating the cutter parameters according to Fa<=FT, wherein the cutter parameters comprise the front angle gamma in the outer diameter of a main blade of the cutter, the top angle 2epsilon of the cutter, the width 2w of a transverse blade of the cutter and the diameters 2b and 2c of the cutter, and designing the cutter according to the cutter parameters obtained through calculation.

The invention discloses an auxiliary pneumatic drill based on ultrasonic vibration. Due to the fact that the ultrasonic vibration is applied to a traditional pneumatic drill, a compound machining mode is formed by organic combination of the ultrasonic vibration and traditional drilling mechanical movement, the continuous cutting mechanism of traditional drilling machining is broken, and the good machining effect is achieved. An ultrasonic transducer is installed on a connecting outer cover through an ultrasonic variable-amplitude mechanism, and a drill bit clamping mechanism is fixedly installed at the front end of the ultrasonic variable-amplitude mechanism. Due to the fact that the ultrasonic vibration is used for assisting drilling, the cutting performance of difficult-to-machine materials is effectively improved, and application of drilling machining is wider. Discontinuous drilling machining of the ultrasonic vibration can solve the problem of poor accuracy, caused by accumulation of lead deviation, of the form and the position, and dimension accuracy of deep-hole machining is improved. Due to the fact that the ultrasonic vibration is used for assisting drilling, average drilling force is reduced, chip breaking and chip discharge are facilitated, abrasion of cutters is reduced, the situation of prolonging the service life of the cutters is facilitated, noise of drilling machining is effectively reduced, and the operation environment of workers is improved.

The invention provides a control method and a control device of a rotary drilling rig, and a rotary drilling rig. The rotary drilling rig provided by the invention includes a drill rod assembly, a pressurizing oil cylinder, a power head, a balance valve and a controller, wherein the pressurizing oil cylinder is used for exerting drilling force on the drill rod assembly through the power head; the balance valve is connected with a rod chamber and a rodless chamber of the pressurizing oil cylinder respectively, and controls the hydraulic flow of the rod chamber and the rodless chamber to generate back pressure; and the controller is used for acquiring the position information of the drill rod assembly relative to the ground, and sends a control command for controlling the on / off of the balance valve as per the pre-arranged mapping of the drill rod assembly and the on / off of the balance valve. According to the invention, the on / off of the balance valve is controlled as per the position of the drill rod assembly, so as to control the necessity of back pressure exertion, as a result, when the power head reaches the assigned position, the pressurized pressure of the oil cylinder can be changed in accordance with different stratum conditions.

The invention discloses a micro-hole drilling method based on combination of cutting fluid ultrasonic cavitation and tool vibration, the chip breaking and chip discharging capacity can be improved according to the characteristics of micro-hole drilling process; the drilling force and the torque are lowered; the surface quality and the dimension and shape precision of the hole are improved; by adopting the micro-hole drilling method, precise drilling of a micro-hole can be realized; the method mainly comprises the steps that a drilling tool is arranged on a drilling main shaft; axial ultrasonic vibration is applied to the drilling tool by utilizing the vibration function of the drilling main shaft; a to-be-processed part is placed in a box containing water-based cutting fluid, so that the cutting fluid inundates the to-be-processed part; one end of the vibration rod of an ultrasonic vibration device is arranged near the to-be-processed part in the cutting fluid; and axial ultrasonic vibration is applied to the vibration rod through an ultrasonic generator, so that the ultrasonic cavitation effect of the cutting fluid is activated. The precise drilling of the micro deep hole is realized through the ultrasonic vibration effect of the drilling tool and the ultrasonic cavitation effect of the cutting fluid.

The invention discloses a non-delamination drilling method based on drilling force control for a carbon fiber reinforced polymer (CFRP) laminate. In the method, in a process of drilling a carbon fiber reinforced polymer (CFRP) laminate with a drill bit, the drilling axial force of the drill bit is controlled to be always smaller than a drilling delamination critical thrust value Fa, wherein Fa is determined by the following steps of: establishing a delamination stable state equation of the CFRP laminate; establishing a polar equation of a small-deflection sheet and a CFRP laminate defection formula of the drill bit during drilling to evaluate the maximum deflection value X of the CFRP laminate; establishing a bending deformation energy formula of the CFRP laminate during drilling, and evaluating the bending deformation energy U of the CFRP laminate during drilling of the drill bit; and determining a drilling delamination critical thrust value Fa according to the evaluated maximum deflection X, the bending deformation energy U and the established delamination stable state equation of the CFRP laminate. Due to the adoption of the method, non-delamination drilling processing of the CFRP laminate is realized, the delamination damage defect of drilling is avoided, the product quality is improved, the cost is lowered, and the efficiency is increased.

The invention provides a rotary ultrasonic drilling transverse vibration stability domain predicting method. The method includes the steps of firstly, acquiring the expression of axial feeding and ultrasonic vibration parts in static drilling thickness on the basis of rotary ultrasonic drilling bit kinematics analysis, and using dynamic drilling thickness to build a transient drilling thickness model; secondly, using a drilling thickness exponential function method to build a dynamic drilling force relation; thirdly, according to the linear theory of a nonlinear periodic function, building a transverse vibration analysis model under the machining manner; fourthly, using a frequency domain solving method to solve the models above to obtain the expression of a critical drilling depth and corresponding rotation speed; fifthly, using MATLAB software to program and draw a rotary ultrasonic drilling transverse vibration stability curve to achieve stability domain predicting.

The invention discloses a piezoelectric type device for measuring the drilling force of a deep hole, belonging to the technical field of sensing, observing and controlling, in particular a device fordetecting the drilling force and the torque moment of the deep hole in drilling process. The device comprises a base, an upper cover, a piezoelectric quartz sensor, a lead wire output plug, a lead wire, a gasket ring, a connecting bolt and a protection pad, wherein the piezoelectric quartz sensor clamped between the base and the upper cover is located in the right center of the device. The piezoelectric quartz sensor comprises a partition electrode, a complete electrode and a quartz wafer. The invention enhances sensitivity by combing a plurality of pieces of quartz crystals, only needs one sensor, and has the characteristics of simple structure, high sensitivity, favorable linearity and repetitiveness and high measurement precision. The piezoelectric type device for measuring the drillingforce of the deep hole can detect the drilling force and the torque moment in the deep hole processing in real time.

The diamond drilling bit includes one steel bit body and one thin wall diamond cone integrated with the steel bit body. The thin wall diamond cone has linear or spiral slug slot and one un-slotted smooth surface. The slot makes the bit operating in intermittent, rather than continuous, grinding in enhanced drilling force, high drilling speed, fluent slug removing and reduced drilling resistance and heat. Timely cooling of the drilling bit and the machined material can avoid deformation and burns.

The invention relates to an SDL pile work drilling method and a pile work drilling machine specially used for implementing the same. The pile work drilling machine comprises a machine frame. A power head capable of moving vertically in a guided mode is assembled on the machine frame, the power head is in transmission connection with a working drill rod, and a drill bit used for bearing vibration impact of a corresponding impactor to impact drilling is installed at the lower end of the working drill rod. The pile work drilling machine further comprises a flexible transmission piece with the axis extending along the vertical direction and a transmission piece driving device used for driving the flexible transmission piece to move vertically in a reciprocating mode. The transmission piece driving device is arranged on the machine frame, and a force transmission device used for applying downward elastic action force on the power head when the flexible transmission piece moves downwards is arranged on the flexible transmission piece. The pile work drilling machine capable of increasing drilling force of the drill bit in the punching drilling process at any time is provided.

The invention discloses a composite anhydrous indentation sealing material for a blast-furnace hot blast stove, comprising the following components in percentage by weight: 65%-70% of a component A and 35%-30% of a component B, wherein the component A comprises the following raw materials in percentage by weight: 20%-40% of high-alumina bauxite powder, 20%-40% of flint clay, 5%-20% of andalusite, 3%-15% of clay and 1%-10% of graphite; and the component B is thermosetting phenolic resin. The composite anhydrous indentation sealing material has good sealing property and flowability, good drilling force and penetrating property in the indentation process, and the like; and in addition, after the composite anhydrous indentation sealing material is used in a blast furnace, the gas escaping amount is zero, the environment pollution is reduced, and the environmental protection and outstanding social benefits are obtained.

The invention discloses a high-speed ultrasonic vibration assistant air drill which is composed of an ultrasonic generator, an ultrasonic wireless power transmission mechanism, a connection mechanism, an ultrasonic energy conversion mechanism, an ultrasonic amplitude varying mechanism and a drill bit clamping mechanism. The ultrasonic generator generates an ultrasonic frequency electric signal and provides ultrasonic frequency electric excitation for a system; the ultrasonic wireless power transmission mechanism achieves effective transmission of electric energy and dynamic and static transition; the connection mechanism is fixedly connected with the ultrasonic energy conversion mechanism, and the ultrasonic energy conversion mechanism is located at the front portion of the connection mechanism and used for converting the ultrasonic frequency electric signal into ultrasonic frequency mechanical vibration; the ultrasonic amplitude varying mechanism is fixed at the front end of the ultrasonic energy conversion mechanism and used for converting small-amplitude mechanical vibration into large-amplitude mechanical vibration; the drill bit clamping mechanism is installed at the front end of the ultrasonic amplitude varying mechanism and used for clamping a drill bit. As ultrasonic vibration is used for assisting in drilling, a traditional continuous drilling mode is removed, and average drilling force of drilling is decreased. By the utilization of the ultrasonic vibration for assisting in drilling, the cutting performance of materials difficult to machine is improved, and application range of drilling machining is made to be wider.

The invention discloses a drilling machine with a mold clamping function. The drilling machine comprises an operation table, supporting seats are fixedly connected to the four corners of the lower endof the operation table correspondingly, a mold placing table is fixedly connected to the upper end of the operation table, and supporting plates are fixedly connected to the two sides of the upper end of the operation table correspondingly; a fixing plate is fixedly connected between the opposite side walls, close to the upper ends, of the two supporting plates, and a hydraulic oil cylinder is fixedly connected to the upper end of the fixing plate; and the telescopic end of the hydraulic oil cylinder penetrates through the fixing plate and is fixedly connected with a placing plate, a placinggroove is formed in the placing plate, and a rotating motor is fixedly connected in the placing groove. According to the drilling machine with the mold clamping function, the structure is compact, andguide mechanisms are arranged at the connecting positions of a drilling mechanism, so that a drill bit is prevented from deviating from the drilling direction to a certain extent due to the fact thatthe drilling force of the drill bit is too large; and moreover, limiting mechanisms for clamping a mold workpiece are arranged, so that the stability of the mold workpiece is improved, and the use effect is very good.

The invention discloses a prediction method and system for drilling axial force of a laminated structure. The method comprises the steps that according to an additional feeding rate caused by deformation of a single-layer structure, a dynamic feeding rate of a drill bit is obtained; according to the dynamic feeding rate, an infinitesimal drilling blade is adopted to establish a drilling axial force model of the single-layer structure; the drilling process of the laminated structure is divided into different stages, and a drilling force model of the laminated structure at each stage is established according to the drilling axial force model of the single-layer structure; physical parameters of the laminated structure, physical parameters of the drill bit and a given feeding rate of the drill bit are acquired; and according to the physical parameters of the laminated structure, the physical parameters of the drill bit and the given feeding rate of the drill bit, the drilling force modelof the laminated structure at each stage is utilized to predict the drilling axial force of the laminated structure at each stage. In this way, prediction of the drilling axial force of the laminatedstructure at all the stages is realized, and prediction precision of the drilling axial force of the laminated structure in the whole drilling process is guaranteed.

The invention discloses a geothermal detecting device for geological exploration, and relates to the technical field of geophones. A detecting rotary head is arranged in a drill bit; during downward drilling, a strong drilling force is taken on by the drill bit, a weak impact from grout can merely be taken on by the detecting rotary head, and the detecting rotary head is matched with a drill bit thread to transport and flow the grout better; when the drill bit thread can allow the detecting rotary head to rotate relative to the drill bit, the grout in a detecting hole moves upwards and flows out through a grout outlet hole, and grout temperature at different positions can be detected; and during drilling, according to the change of detected temperature, the detection to geothermy is realized, at the same time, a plurality of geothermal detecting assemblies used to detect temperature are arranged on the detecting rotary head, the accuracy of detecting temperature is ensured, and the performance of detecting the geothermy is improved.

A step-type axial vibration drilling technology for drilling medium or small hole on the material difficult to machine features that a step motor is used as the power source for the axial movement of drill bit for combining the axial advancing with axial vibration. Its apparatus is composed of machine-tool body, dynamic strainometer, systematic microcomputer, hardware interface (and its software), step motor and its driver, speed reducing mechanism, and drilling force measuring meter.

Above ground part of well includes power station, high-pressure hydraulic pump and high-pressure oil pump. Underground part of well is full hydraulic system including power transmission system, chassis supporter, manipulator system, drill pipe and drilling bit, balancing and positioning system, and landing gear of angular adjustment. Hydraulic motor drives rotation of drill pipe, and hydraulic ram controls drill pipe for going forward or back. Features of the invention are high safety ensured by full hydraulic system in underground part, powerful drilling force, easy to adjust angle of drilling machine. The invented system is suitable for developing and controlling shallow groundwater, irrigation of agricultural land, city water supply and lowering level of water in pothole etc.

The invention belongs to the field of part processing and particularly relates to a composite cutter for drilling and boring a hole and processing an end surface annular groove. A tool holder is installed on the top of a non-standard cutter body; drill blades are installed at the bottom of the non-standard cutter body; one drill blade is installed in a manner of passing through an axis of the non-standard cutter body, and the other drill blade is installed on the outer side of the non-standard cutter body; rough boring blades and radius boring blades are symmetrically installed on the outer side of the non-standard cutter body sequentially; a regulation cutter clamp is arranged above the radius boring blade on one side and is provided with a finish boring blade; chamfer blades are symmetrically installed on the outer side of the non-standard cutter body; and non-standard groove blades are arranged on the outer sides of the chamfer blades in a staggering manner respectively. By adoptingthe composite cutter provided by the invention, the cutter changing time and the cutter cost are saved, the processing efficiency is improved, and the processing cost is lowered; larger drilling force can be acquired at the same time, so that processing is lighter, the danger of drop-dead halt of the cutter is avoided, and the processing efficiency is improved; the inside and outside diameter sizes of the annular groove are more easily controlled, the quality is more reliably ensured, and the quality stability of parts is high when the parts are produced in batch.

The invention discloses an online monitoring method for the abrasion forms and the abrasion state of a drill bit in the high-temperature alloy drilling process. The online monitoring method is used for solving the technical problem that an existing drilling process drill bit abrasion state monitoring method is poor in applicability. According to the technical scheme, signal features are extractedfrom the influence rule of drilling force signals based on the different drill bit abrasion forms of the high-temperature alloy drilling process, and a Bayesian network model of the drill bit abrasionforms and the signal features is set up through the drilling force and drill bit abrasion data based on the Bayesian theory on this basis; and then the drill bit abrasion forms are judged through Bayesian diagnosis and inference according to monitoring signals, and the signal features influencing the abrasion forms are acquired through Bayesian causal reasoning. Meanwhile, according to the tool abrasion curve rule, the signal features are monitored through an accumulation and control chart method, the target of monitoring the drill bit abrasion states in real time is achieved, and high practicality is achieved.

The invention discloses a handheld type ultrasonic electric drill, which comprises a drill bit, an ultrasonic vibrator, an output shaft, a carbon brush, an insulated coupling, a motor, an outer casing, a power transmission cable, an electric drill controller, a motor rotation speed control trigger, an ultrasonic switch pushbutton, a fixing ring, an electric collector ring, an insulation ring and an ultrasonic power source, wherein the output end of the output shaft is connected with a flange disc of the ultrasonic vibrator, the drill bit is arranged at the output end of the ultrasonic vibrator, and the electric energy input end of the ultrasonic electric drill controller is electrically connected with the ultrasonic power source by the power transmission cable. The handheld type ultrasonic electric drill has the advantages that the ultrasonic vibration is realized, the ultrasonic vibration frequency reaches 20kHz, the drilling force in the drilling process is obviously reduced, an operator can use smaller force to drill material, the labor intensity of the operator is decreased, the drilling efficiency is improved, the abrasion of the drill bit is reduced, the drilling quality is high, the flashes and burrs are fewer, the damage to surrounding material is avoided, and the secondary processing on the surfaces with higher quality requirement is not needed.

The invention relates to the technical field of T iron machining, and provides a high-property T iron punching device for a loudspeaker. The high-property T iron punching device comprises a base and further comprises a controller, a loading mechanism, a punching mechanism and a discharging mechanism. The loading mechanism comprises a placing table and a first absorbing assembly, the punching mechanism comprises a rotating disc, a driving assembly and a drilling assembly, the discharging mechanism is arranged on the other end of the top of the base in a through manner to discharge drilled T iron, the discharging mechanism comprises a conveying belt and a second absorbing assembly, the second absorbing assembly is slidingly arranged beside the rotating disc, the conveying belt is arranged onthe end, away from the top of the placing table, of the base, and the first absorbing assembly, the driving assembly and the second absorbing assembly are electrically connected with the controller.According to the loudspeaker high-property T iron punching device, the T iron punching operation space is maximized, the punching efficiency is improved, the yield is increased, meanwhile, it can be effectively ensured that the T iron is not damaged by too large drilling strength, and the T iron quality is ensured.

An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.

The invention discloses an unbalance ridding mechanism for cross-flow fan dynamic balance emendation, which comprises a base. A cross-flow fan is clamped on the base; the base is provided with two sets of drilling unbalance ridding assemblies for drilling unbalance ridding and two sets of end surface top tight assemblies for cancelling the drilling force; the two sets of the drilling unbalance ridding assemblies and / or the two sets of the end surface top tight assemblies are respectively arranged at two ends of the cross-flow fan; and when a drilling milling cutter on the drilling unbalance ridding assembly performs drilling processing, the end surface top tight assemblies at the same side do not act on the cross-flow fan, and the end surface top tight assemblies at the opposite side act on the cross-flow fan to cancel the drilling force. Two sets of the drilling unbalance ridding assemblies and the two sets of the end surface top tight assemblies are arranged symmetrically, a uniform stress layout with drilling unbalance ridding at one end and top tight at the other end is adopted, axial offset of the cross-flow fan caused by the drilling force can be effectively avoided, the precision of an unbalance test system is ensured on one hand, and on the other hand, the drilling depth precision can be ensured; and in addition, as a debris absorption assembly is arranged, debris generated by drilling can be timely cleaned, and cleanness of the working environment can be effectively ensured.

The invention relates to a long spiral drilling machine for efficient soil clearing. The long spiral drilling machine comprises a machine body, a stand column is installed on the machine body, a winding roller is rotatably connected to the machine body, a first motor for driving the winding roller to rotate is fixedly connected to the machine body, a first steel cable is fixedly connected to the winding roller in a winding manner, the end, far away from the winding roller, of the first steel cable passes around the upper end of the stand column and is fixedly connected with a power head, and the power head is in sliding connection with the stand column along the length direction of the stand column, the power head is rotatably connected with a drill rod which is vertically arranged downwards, a thread spiral blade is fixedly and spirally connected to the drill rod, the power head is provided with a second motor which is used for driving the drill rod to rotate, the winding roller is wound and fixedly connected with a second steel cable, the stand column is rotatably connected with a guide wheel, the end, far away from the winding roller, of the second steel cable is fixedly connected to the power head, and the winding directions of the first steel cable and the second steel cable are opposite. The long spiral drilling machine has the effect of improving the drilling force of the drill rod to a certain extent.

The invention discloses a depth-controllable rock sample drilling device and a utilization method. The problem about accurately drilling rock samples of different shapes is solved. The drilling devicecomprises a vertical rack, a drilling mechanism, an I-shaped slide mechanism, a caliper mechanism and a displacement mechanism, wherein pushing rods are arranged on a base of the vertical rack; the samples are fixed through the pushing rods; the pushing rods are provided with scales, so that the samples are accurately moved; clamping plates are arranged in front of the pushing rods; the clampingplates are changed to adapt to the samples of different shapes; and a through hole is formed in the center of the base of the vertical rack. According to the depth-controllable rock sample drilling device, holes of the processed samples are protected; stress springs are arranged in the slide mechanism, drilling force is controlled, and the drill sticking problem is avoided; and the outer surfacesof slides and the caliper mechanism are provided with scales, so that the drilling position and drilling depth are accurately controlled. The invention further discloses an operation method for drilling the rock samples of different shapes at different depths.

A drill fixture enabling drilling through hard objects in a confined area includes a housing, a threaded rod connected with the housing, and a tubular adjustment sleeve rotatably connected with the rod. A drill is arranged in the housing and has a drill bit extending in a forward direction. The sleeve is rotated relative the threaded rod for displacement along the length of the rod until the sleeve engages a fixed surface opposite the object to be drilled. With the sleeve rear portion engaging the fixed surface, further rotation of the sleeve displaces the housing in a forward direction during rotation of the drill bit so that the bit bores through the hard object until a hole is formed. Rotation of the sleeve in the opposite direction causes the drill bit to be retracted from the object. In lieu of a rotatable sleeve, a piston may be provided which is extended and retracted relative to the housing to provide a linear drilling force to the drill bit relative to a fixed surface.

The invention discloses a drilling force detection device and relates to the technical field of drilling force analysis. The center of a circular supporting base is provided with a pressure sensor, asupporting circular disk capable of rotating relative to the circular supporting base and a clamping platform. The outer side of the clamping platform is provided with a pressure sensor, and a pressure sensor in the clamping direction is arranged in the clamping platform. Accordingly, the drilling force detection device can implement pressure detection on a tool in three directions. When drillingis implemented, the drilling force detection device can detect axial force, radial force and tangential force through the three pressure sensors. The drilling force detection device is further provided with a laser positioning and clamping fixing device. Adjustment on the device and clamping on the tool can be realized conveniently. The drilling force detection device provides a convenient hardware platform for drilling force detection. In addition, the invention further provides a detection method based on the drilling force detection device. Through the drilling force detection device and detection method, the positioning, clamping and data detection efficiency in the detection process can be improved.