538 results about "Hole making" patented technology

Machine for ground drilling, with a circulating fluid, by the utilization of electric discharge generated by high-voltage pulses between electrodes. It may comprise: —A drill-bit 1 with electrodes movable relative to each other, so that bottom-hole physical contact be secured for all the electrodes 4 on all bottom-hole topographies. —Pointed hydraulic nozzles for jetting the fluid, to remove primary cuttings and with pressure expansion across the nozzles 7 at no less than 4 MPa. —A high-voltage pulse generator deployed down-hole at a minimum distance from the drill-bit 1. —A rotating or oscillating bit causing the borehole cross-sectional excavation to occur, and electric discharge between a plurality of electrodes situated on the bit face along one or a few radii and tangents. —A bottom hole assembly for annular hole-making with core storage, transportation, down-hole closed loop discharge fluid circulation. A discharge fluid storage may be incorporated. A drilling method is also described.

The invention provides a mobile hole-making robot standard alignment method based on a high precision industrial camera, and belongs to the industrial robot calibration technical field. The method adopts a high precision industrial camera and a Z-direction laser distance sensor for confirming three-dimensional coordinate value of a standard hole for confirming relative position relationship of the parts and an industrial robot; the industrial robot is circularly adjusted for many times until that the vertical angle between the plane of the part nearby the standard hole and the industrial robot end tool meets the requirement; the standard hole can also get to the preset standard position in the camera coordinate system; the coordinate value of the current standard hole in the robot pedestal coordinate system is used for establishing a workpiece coordinate system. The mobile hole-making robot standard alignment method based on the high precision industrial camera can full-automatically perform standard detection, is high in precision, high in efficiency, economic and practical, simple and pellucid in operation sequence.

The invention belongs to the technical field of pipe whip restraint steel structures of main power houses of nuclear power station conventional islands, in particular to a production process method of the pipe whip restraint steel structure of the main power house of the nuclear power station conventional island, which comprises the lofting process, the marking-off and scribing process, the cutting processing process, the bevel processing process, the hole-making process, the correction process, the polishing surface, the material splicing process, the pre-splicing process of a steel member, the assembly process, the processing process of a friction surface, the welding process of the steel structure and the anti-slip test of the friction surface of the steel member before leaving a factory, sandblasting, derusting and coating of a base coat are carried out in the factory, and the production of the steel structure is divided into the production processing of a welded H-shaped steel column, the production of a steel beam, the assembly and the welding of a support part, the production of a combined steel beam, the assembly and the welding of a girder box body and an inclined support below the girder box body, and the assembly and the welding of a pipe whip restraint key. The production process method can improve the drilling precision, utilize a numerical control planar drilling machine to complete the drilling on a gusset plate, determine a variety of processing processes and welding process parameters, and ensure the dimension of the member after the assembly and the smooth proceeding of field installation.

The invention relates to a method for manufacturing a carbon ceramic brake disc, which comprises the following steps of: preparing a carbon fiber blank body, performing natural gas chemical vapor immersion (CVI), graphitizing, machining, making holes, performing a melting reaction and grinding accurately to prepare a carbon ceramic composite brake disc, wherein in the hole making step, a plurality of through holes are distributed on a disc surface of the brake disc fully, and the center line of each through hole is perpendicular to the disc surface of the brake disc. In the method, the through holes distributed on the disc surface of the brake disc fully allows liquid state Si to permeate in the thickness direction of the brake disc uniformly and permeate on the whole friction surface uniformly in a melting Si permeating reaction and ensure the melting Si permeating reaction occurs at an area in the thickness direction intensively and influences the size of the thickness direction only without influencing the size at an area in the radial circumferencial direction basically, so that in the subsequent carbon ceramic machining, the thickness area is machined only. Therefore, the method has the characteristics that the Si permeating depth is desirable; the Si permeation is uniform; and products are easy to machine.

PCT No. PCT / JP97 / 02013 Sec. 371 Date Nov. 3, 1998 Sec. 102(e) Date Nov. 3, 1998 PCT Filed Jun. 11, 1997 PCT Pub. No. WO98 / 57066 PCT Pub. Date Dec. 17, 1998A scroll type fluid machine having a bypass hole structure for capacity control is disclosed. The scroll type fluid machine comprises a first scroll having a first spiral blade, and a second scroll having a second spiral blade. A first fluid working chamber is formed between an inner surface of the first spiral blade, and a second scroll having a second spiral blade. A first fluid working chamber is formed between an inner surface of the first spiral blade and an outer surface of the second spiral blade, and a second fluid working chamber is formed between an outer surface of the first spiral blade and an inner surface of the second spiral blade. A winding end of the first spiral blade is extended so that the first fluid working chamber and the second fluid working chamber open and close with respect to a single low-pressure port. A common bypass hole making the first and second fluid working chambers communicate with the low-pressure port in common is provided.

The invention discloses a robot hole-making error compensation device suitable for curved surface structures and a method thereof, and belongs to the field of robot hole-making. The robot hole-makingerror compensation device suitable for the curved surface structures comprises an industrial camera, four laser ranging sensors, a cutter, a specific calibration plate, a rigid detachable connecting shaft and a plurality of clamps. The industrial camera is fixedly connected to the tail end of a robot at a certain angle, and the four laser ranging sensors are distributed at the periphery of the cutter. The method of the robot hole-making error compensation device suitable for the curved surface structures comprises the steps that homography transformation is adopted to represent the hand-eye relationship; a three-dimensional error matrix is established by a robot theoretical driving coordinate corresponding to a reference hole and an actual driving coordinate, and a driving coordinate of ato-be-drilled hole in the neighborhood of the reference hole is recalculated through the three-dimensional error matrix to complete the positioning error compensation of the to-be-drilled hole. The homography matrix between a camera image plane and a hole-making working plane to represent the hand-eye relationship is used for on-line detection, the robot hole-making error compensation device suitable for the curved surface structures and the method thereof are simpler and easier to operate, and the calculation of reference hole error is established in a three-dimensional space, so the robot hole-making error compensation device suitable for the curved surface structures and the method thereof are more suitable for curved surface hole making.

The invention provides a hole making method with alignment based on machine vision. The hole making method is realized through a vision measurement technology of a vision camera, and comprises the following steps of: photographing a locating pin on the surface of a wall plate through the vision camera; carrying out pixel processing on the photographed image through an image processing system; calculating to obtain a geometric center of the locating pin; further calculating to obtain a deviation value of a center of the vision camera and the geometric center of the locating pin; transmitting the deviation value into a movement mechanism controller; driving a movement mechanism to move; and forming a feedback measurement and error compensation closed-loop system until the deviation value reaches to position accuracy requirement of hole making. A projective point of a hole making main shaft projected on a wall plate face is ensured to be consistent to the geometric center of the locating pin, so that the position accuracy of hole making is ensured. Connecting holes with high accuracy can be prepared quickly, the cost is obviously reduced, the work environment is improved, and the hole making efficiency and the assembly accuracy are greatly improved.

The present invention provides an absorbability article which has cubic effect, high buffering property, and can keep concave-convex form not only under drying condition but also under the condition of absorbing sap by improving the form retentivity of concave-convex embossed pattern. The absorbability article (1) is provided with an absorbing body (4) between permeating front side and back side thin sheets (3) and (2), wherein, the front side thin sheet (3) is a multi-layer sheet which at least comprises a nonwoven cloth layer (3A) forming the skin contacting surface and a plastic film layer(3B) laminated on the non skin contacting surface of the nonwoven cloth layer, the plastic film layer (3B) is composed of material with a melting point lower than the nonwoven cloth. Under the heating condition with a melting point higher than the melting point of the plastic film layer (3B) and lower than the melting point of the nonwoven cloth layer (3A), the concave-convex embossing process composed of a plurality of projecting parts (7, 7......) projecting outside is executed to the front side thin sheet (3), and the hole making process is executed to the top of the convex embossed pattern or the bottom of the concave embossed pattern of the concave-convex embossed pattern.

A Push-Pull-type electrostatic ultrasonic transducer includes a first electrode having a through hole, a second electrode having a through hole making a pair with the through hole of the first electrode, and a vibration film held between a pair of electrodes composed of the first and the second electrodes and having a conductive layer to which a direct-current bias voltage is applied, and holds the pair of electrodes and the vibration film. Assuming that λ is the wavelength of the carrier wave having a frequency shifted as a predetermined amount of frequency from the resonance frequency, which is the mechanical resonance frequency of the vibration film, the thickness t of each of the pair of electrodes is set to (λ / 4)·n or roughly (λ / 4)·n (where, λ is the wavelength of the ultrasonic wave, n is a positive odd number), and an alternating-current signal, which is a modulated wave obtained by modulating the carrier wave in the ultrasonic frequency band with a signal wave in an audible frequency band, is applied between the pair of electrodes.

The invention relates to a method to construct the pile by injecting grout through a bag, which is characterized in that the method comprises the procedures: 1) a pile hole is formed in the soil with a hole-making machine; 2) a bag is sleeved outside a grout injection tube and the bag is bound on the grout injection tube with a strip segment by segment along the axial direction, the two ends of the bag is tightly bundled, the lower end of the grout injection tube is sealed and the grout injection tube is provided with an injection hole on the tube wall; 3) the grout injection tube which is sleeved with the bag is placed into the pile hole; 4) the grout injection tube is used for injecting grout into the bag section by section from the bottom to the top, the next section is injected until the design pressure of the present section is reached until the whole bag is filled with grout and a whole pile body is formed. The invention adopts the bag pile to enhance the soft underlying soil, which can commendably control the investment and solve the problem of sedimentation and stability. As the bag has the separation effect, the grout can facilitate the surrounding soil to compact and expel the water by expanding the bag; the formed pile body is relatively regular and the intensity of the pile body is higher and controllable.

The invention relates to a porous material and a method for preparing the same and discloses a method for preparing a silk fibroin three-dimensional porous material. The method comprises the following steps of: slowly concentrating a water solution of silk fibroin, uniformly mixing the water solution of silk fibroin with alcohol, and freezing and drying the misture to directly obtain a water-insoluble silk fibroin porous support material; regulating and controlling the secondary structure and the mechanical properties of the porous support by selectively using after-treatment means, and controlling the porosity, the pore diameter and the like of the porous material by changing the parameters of silk fibroin concentration, freezing temperature and the like; and finally, soaking the silk fibroin porous support material in water to remove alcohol. The invention has mild preparation process conditions, no addition of any cross-linking agent, any hole making agent and other toxic organic solvents, simple, convenient and controllable process and easy realization of industrialization; the biocompatibility of silk fibroin can be effectively maintained, and the silk fibroin can be applied to the tissue repair of bone, cartilage, anadesma, nerves, skin and the like, the drug controlled-release carriers and the like.

The invention provides a laser distance measuring sensor calibration method and belongs to the field of robot calibration. Devices employed by the method include a laser tracker, an industrial mechanical arm, a flange plate, a hole making end effector, a calibration rod, a planar calibration plate and an installing rack. The hole making end effector mainly comprises a feeding module, an electric spindle, an electric spindle installing base, a big target ball seat, a small target ball seat, a pressing head and four laser distance measuring sensors. The method comprises the steps of firstly calibrating an included angle between a laser beam and an electric spindle feeding direction; building a tool coordinate system and a work piece coordinate system by means of the laser tracker and moving the hole making end effector to a place in front of the planar calibration plate and performing rotation for multiple times; calculating the coordinates under the coordinate systems in different states of each laser point according to geometrical relationships, transforming the coordinates of all the points to the same coordinate system and obtaining a space equation of the laser beam through fitting. The method can calibrate transmitting point positions and laser beam vector orientations of laser distance measuring sensors and make normal detection results more accurate.

The invention relates to an automatic wing-body docking hole-making system and a method, which belongs to the technical field of operating transport. The method comprises the following steps: mainly utilizing the principle of magnetic positioning to firstly determine the projection position of a blind hole on the outer surface of a wing body and make a mark point; secondly, determining the pose of the mark point in a coordinate system of a hole-making device by image processing technique; and finally, generating corresponding motion control instructions to control a hole making unit to complete the processing of the hole according to the pose of the mark point. The system mainly comprises a hole positioning unit (7000), the hole making unit (1000), a normal vector detection unit (2000), a normal vector pose-adjusting mechanism (3000), a movable vehicle body (4000) and a central control unit (5000). The method and the system can better solve the processing problem of wing-body docking connecting holes.

The invention discloses a hybrid measurement method for positioning a part to be assembled in the flexible assembly process of airplane components, belonging to the research contents of modern manufacturing technology in the field of advanced manufacturing technology. The method is a measurement positioning method for establishing a relative positional relationship between automatic hole making equipment and the part to be assembled in the flexible assembly process of the airplane components. The method adopts a laser measurement apparatus as a rough positioning means of the hole making equipment and adopts photographing measurement equipment as a means of accurately positioning the part to be assembled, and realizes accurate positioning of the part to be assembled by two steps. Through the method, the problem of incoordination between the automatic hole making equipment and a workpiece to be assembled resulting from excessive error accumulation of the assembly process in the flexible assembly process of the airplane components is solved to a certain degree, and an effective means of using automatic equipment in the flexible assembly of the airplane components is provided.

A sucker-type integrated robot in the field of robot technology, comprising: a frame, a hole-making mechanism, a control module and six sets of leg mechanisms, the six leg mechanisms are respectively fixed around the frame and the output ends of the sensing mechanism Connected with the control module to output six-dimensional force sensor data, the hole making mechanism and the control module are fixedly arranged on the frame, and the control end of the hole making mechanism is connected to the output end of the control module to receive control instructions. The present invention adopts the integrated design scheme of walking hole-making operation, which can be used for butt jointing and circular automatic hole making of various sections of the fuselage (such as the docking between the sections of the nose, front fuselage, middle fuselage, middle and rear fuselage), machine Automatic hole making for longitudinal splicing of body wall panels, automatic hole making on the surface of wall panels for airfoil components (such as the connection of wing skin and ribs), etc. The robot system has the advantages of good flexibility, adaptability to various workpieces, short implementation period, low cost, light weight and convenient use.

The invention belongs to the technical field of textile equipment, and particularly relates to an environment-friendly cloth drying device. The device comprises a drying box, a plurality of first liquid discharge pipes are connected to the side walls of the left end and the right end of the drying box, a separation plate is vertically arranged on the drying box, the upper end and the lower end ofthe separation plate are fixedly connected with the top surface and the bottom of the drying box correspondingly, the separation plate divides the drying box into a dehydrating chamber and a drying chamber in a separating mode, the inner walls of the left end and the right end of the dehydrating chamber and the inner walls of the left end and the right end of the drying chamber are provided with cloth through openings, the bottom of the dehydrating chamber is provided with a lower extruding device, the top surface of the dehydrating chamber is provided with an upper extruding device, the upperextruding device is located right above the lower extruding device, a plurality of drying devices are arranged at the bottom of the drying chamber, a plurality of guide rollers are rotationally connected to the inner wall of the rear end of the drying chamber, and a first through hole making the inside and the outside communicate is formed in the top surface of the drying chamber. The device hasthe advantages that the drying efficiency of the cloth can be effectively improved, harmful gas generated by drying the cloth can be absorbed, and the environmental protection property of cloth dryingis effectively improved.

The invention discloses a multifunctional end effector, and belongs to the technical field of aircraft assembly. The multifunctional end effector comprises a base, a translating unit, a hole making unit and a screw inserting and tightening unit, and the multifunctional end effector is high in integration level, clear in division of each unit, powerful in function, capable of making holes and screw inserting and tightening automatically, high in processing efficiency, high in degree of automation and reliable in processing quality.

The invention discloses a helical hole-milling device and method based on a numerical control machine and belongs to the technical field of helical hole-milling processing. The device is based on a helical milling principle and the helical hole-milling is realized through the coordination of a processed knife handle and the numerical control machine, wherein the needed revolution and feed motions for hole-making is provided by the numerical control machine, the spin is provided by a pneumatic main shaft and the offset is regulated by a worm gear. The device comprises a pneumatic main shaft fixing mechanism, the pneumatic main shaft and an air feed mechanism thereof and a radial offset mechanism. The device provided by the invention has the advantages of simple structure, convenience and fastness in offset adjustment, reliable performance, high processing precision and wide application range, simplified numerical control programming and obviously improved processing efficiency.

The invention relates to a composite material and metal connection structure comprising a metal connector and a composite material connector. The composite material and metal connection structure is characterized in that connected parts of the metal connector and the composite material connector are provided with thin pins; one end of every thin pin is fixedly connected to the metal connector, and the other end of every thin pin is inserted into the composite material connector. The invention further discloses a forming method of the connection structure. The forming method includes the steps of a, fixedly connecting one end of every thin pin to the metal connector; b, placing the other end of every thin pin into composite material, and not cutting off reinforcing material of fiber with the direction matching with the shape of the thin pins; c, solidifying the composite material to form. The composite material and metal connection structure and the forming method thereof have the advantages that the composite material of fiber is not cut off by the thin pins on the metal connector, the problem of hole-edge stress concentration caused by hole making is avoided, glue cracking and laminate outside layering can be suppressed, the connection structure has the advantages of both the glued structure and the mechanically connected structure, and defects in the glued structure and the mechanically connected structure are largely overcome.

The invention discloses an industrial robot variable parameter stiffness identification and modeling method, which belongs to the technical field of industrial robot stiffness identification. In the method, the effective working space of the robot is divided to multiple cubic regions; in view of a working task for a certain processing region, through applying different loads to an end effector under multiple positions and multiple postures in the region, based on the relationship between a load and end deformation, the robot joint stiffness in the interval can be identified and acquired, and accurate stiffness control on the robot at different working intervals during the processing process is realized. The method can realize accurate evaluation on the stiffness performance of the robot during the working process, the end deformation during the loaded processing process is thus accurately predicted, the effects of improving the processing precision and the quality are further achieved,and the application requirements of the robot in the field of high precision machining such as milling and hole making can be met.

An eccentric rotation drive mechanism which is rotatably contained in a first slide container is provided with an outer cylinder, an internal cylinder which is housed at eccentric position thereof and a first air motor contained therein. One end of a rotation shaft portion, that is, a shaft of the first air motor is fastened to a hole making tool, the other end of which is coupled to the end surface of the outer cylinder through a first reduction device. The rotation of the air motor makes the hole making tool rotate and revolve and simultaneously the rotation of a second air motor mounted outside of a casing is transmitted to a ball screw through a rotation transmission device inside of a second slide container to advance and retreat a feed drive mechanism so as to machine a hole in a workpiece.

A method for manufacturing a shield tunnel longitudinal prestressing concrete lining segment comprises the steps of (1) respectively and permanently embedding hole making devices at the preset positions of a connecting block, a standard block and an arch base block of each set of circulating district lining ring to make a hole way, and hole ways on adjacent pipe pieces are correspondingly and longitudinally communicated to form a plurality of preset channels which longitudinally penetrate through the circulating districts; (2) respectively penetrating prestressing steel strands into the preset channels, and when one circulating district is spliced, conducting tension and anchorage to form the whole structure. The method is combined with longitudinal high-strength steel strands, the tunnel overall rigidity is improved, longitudinal deformation is reduced, and longitudinal uneven sedimentation is especially reduced. Precompression is exerted on the concrete lining segment in the longitudinal direction, the stress between lining rings is kept well, stretching and error lifting of the joint between the lining rings are avoided, and water leakage is prevented and controlled.

The laser boring method of non-metal thin-type material includes the following processes: according to the requirements selecting boring mode, setting program parameters of control device to control laser power, utilizing movement pathway of bean-deflecting system to regulate bore size, density and pattern, on-line detecting movement speed of machined material to transfer it into computer, makingreal-time computing compensation and making compensation correction to implement laser boring process. Its equipment includes laser and mater running device, beam-deflecting sytem, control device, speed sensor and borning device, etc.

The invention provides a rapid high-precision normal vector measurement method for a hole making point of a complicated curved surface, belongs to the technical field of vision measurement of a computer and relates to the rapid high-precision normal vector measurement method for the hole making point of the complicated curved surface. The method adopts a method for normal vector measurement based on binocular vision combined with a dynamic projection point. The measurement method comprises the following steps: firstly carrying out layout optimization of the dynamic projection point; extracting the edge position of the projection point by adopting a Canny edge detection operator; rapidly extracting the coordinates of the center of the projection point by adopting an ellipse-fitting algorithm; carrying out three-dimensional reconstruction corresponding to the extracted coordinates of the projection point of an acquired image; and finally accurately fitting the three-dimensional surface information of the surface of a component inside the neighborhood of the hole making point based on a quadric surface fitting algorithm, and solving to obtain the normal vector of the position of the hole making point. By adopting a projection mode of the dynamic projection point, the method can increase the quantity of measurable spatial points, can adjust the position and quantity of the points according to needs so as to adapt to the requirements of different surfaces, and can satisfy the requirement of rapid high-precision measurement of the normal vector of the hole making point of the complex curved surface.

The invention discloses a four-cylinder cross pile hole-making machine which comprises a lifting ring, a water inlet rubber hose, a water inlet steel pipe, a quick coupling and four limit plates (including a front limit plate, a rear limit plate, a left limit plate and a right limit plate). The four-cylinder cross pile hole-making machine is characterized in that the left end of a left cylinder is in pin connection with the upper end of a left rocker arm, the left rocker arm is in pin connection with a left cutter bar, and the middle part of the left rocker arm is in pin connection with a beam A; the right end of a right cylinder is in pin connection with the upper end of a right rocker arm, the lower end of the right rocker arm is in pin connection with a right curter bar, and the middle part of the right rocker arm is in pin connection with the beam A; and a front cylinder and a rear cylinder as well as a front rocker arm, a rear rocker arm, a front cutter bar, a rear cutter bar and saw cutters which are connected with the front and rear cylinders are arranged the same as those of the left and right cylinders, rocker arms and cutter bars.

The invention discloses a differential screw hole-making device and a method, belonging to the technical field of flexible machining equipment. The device mainly comprises a differential screw feeding mechanism, a rotating mechanism and a radial deviation adjusting mechanism, wherein the differential screw feeding mechanism realizes the screw motion of a cutter bar; the rotating mechanism drives the cutter bar to rotate; and the radial deviation adjusting mechanism adjusts the deviation of the cutter bar relative to the axis of a support sleeve. The method is characterized in that during hole making, the screw motion of the cutter bar is controlled by the differential screw feeding mechanism, and the rotation of a cutter is realized by the rotating mechanism. Through the radial deviation adjusting mechanism, the cutter bar can be adjusted according to the aperture of the hole to be made relative to the revolution radius of the support sleeve, and the axial feeding can be realized easily through the addition of the differential combination screw. Therefore, the device and method can be used for mass production of hole making for difficult machining materials such as titanium alloy and carbon fiber reinforced composite materials. In addition, the device has high degree of integration and light weight, and can be used as a tail end execution unit of an automatic hole-making system of a robot. The device and method can greatly improve the hole-making quality and efficiency of parts difficult to machine.

The invention discloses a manufacturing method of a composite material laminated plate with holes. The manufacturing method comprises the following steps: a step I of forming through holes in upper and lower mould boards, manufacturing pins with corresponding dimensions corresponding to the through holes of the mould boards, wherein one end of each of the pins is a flat end, and the other end of each of the pins is machined with chamfer, and the flat end of each of the pins is inserted into the lower mould board; a step II of manufacturing and gum dipping of fiber cloths; a step III of coating a de-molding agent on the upper and lower mould boards and the pins, laminating the fiber cloths under a semi-dried state according to a preset fiber direction of the composite material laminated plate, and enabling fibers in each layer of the filter cloths to bypass pins in the lower mould board during laminating; a step IV of compounding the mould boards to carry hot-pressing and curing; and a step V of opening a mould. The manufacturing method disclosed by the invention has the advantage that fibers at holes of the composite material laminated plate are retained and reasonably distributed near the holes of the composite material laminated plate, so that strength of the composite material laminated plate with holes is far greater than that of a composite material laminated plate with holes obtained by an existing hole-making method.

The invention discloses an automatic spiral hole milling device and a method used for a large workpiece multihole system. The automatic spiral hole milling device comprises an L-shaped support as well as a revolution radius regulating mechanism, a tool rotation speed regulating mechanism and a spiral feeding mechanism which are arranged on the support. The automatic spiral hole milling device disclosed by the invention can be taken as a handheld spiral hole making tool and also can be taken as a terminal executing unit of a robot automatic hole making system, and processing quality and efficiency of the large workpiece multihole system can be greatly improved.

The invention discloses a precise locating method for automatic assembly hole making. A hole making system is composed of a five-axis machining machine tool and a laser tracker. A product is mounted on an assembly fixture and made to be in a stable hole making state, the product and the assembly fixture are together moved to the five-axis machining center and fixed, the laser tracker is used for building a coordinate system through datum points of the assembly fixture, the appearance contour of the product is scanned, a solid numerical model is generated from a point cloud obtained by scanning in the reverse direction, measuring software is used for automatically generating a hole site closest to the 3D space of appearance contour mathematical points of the product in space on the surface of the solid numerical model, and the hole site is used as the basis of five-axis machining hole making. The precise locating method has the advantages that machining precision is improved, complex operation and repeated calibration in the hole making process are omitted, precision of the hole making locating degree, the perpendicularity and the reaming cavity depth is better than the requirement of automatic hole making specifications, an expensive end effector is not needed, manufacturing cost is lowered, and production efficiency is maximized.