116 results about "Gun drill" patented technology

The invention relates to the technical field of handheld gun drills, and discloses a lithium battery wireless operation gun drill which comprises a gun body, a supporting sleeve is fixedly connected to the outer wall of the gun body, a first sliding sleeve is slidably connected to the outer wall of the supporting sleeve, and a driving rod is rotatably connected to the inner wall of the gun body through a bearing; a sliding rod is slidably connected to the outer wall of the driving rod through a spline, a chuck is fixedly connected to the end, away from the driving rod, of the sliding rod, a supporting mechanism is arranged on the outer wall of the first sliding sleeve and comprises a third sliding sleeve, the inner wall of the third sliding sleeve is slidably connected with the outer wall of the first sliding sleeve, and a second positioning block is inserted into the inner wall of the third sliding sleeve. The gun body is supported through the supporting mechanism, the friction force between the gun body and the surface of the metal plate is increased, when the drill bit is stuck, the impact force generated by self-rotation of the gun body part is released to the surface of the metal plate through the pressing plate and the pressing block, and the situation that the counter impact force generated by sticking of the drill bit in the drilling process is too large is avoided.

The invention relates to the technical field of handheld gun drills, and discloses a brushless motor driven pistol drill which comprises a shell, the inner wall of the shell is fixedly connected with a brushless motor, the inner wall of the shell is rotatably connected with driving teeth through a bearing, a buffer mechanism is arranged in the shell, the buffer mechanism comprises a driving rod, and the driving rod is fixedly connected with the brushless motor. The outer wall of the side, close to the driving teeth, of the driving rod is fixedly connected with the inner wall of the driving teeth, the outer wall of the driving rod is connected with a hinged plate through a rotating shaft hinge, the other end of the hinged plate is fixedly connected with the outer wall of the connecting rod through a rotating shaft, and the inner wall of the driving rod is fixedly connected with an elastic push rod. And the other end of the elastic push rod is fixedly connected with the inner wall of the connecting rod. According to the handheld gun drill, the buffering mechanism is arranged to release reverse twisting force generated when the drill bit drills holes, the situation that the temperature of the brushless motor is increased due to the fact that instantaneous resistance of the brushless motor is increased is prevented, and the stability of the handheld gun drill in the working process is improved.

The embodiment of the utility model provides a deep hole drilling machine tool. The deep hole drilling machine tool comprises a base; the driving assembly comprises a first rotating mechanism and a second rotating mechanism, the first rotating mechanism can rotate around the horizontal axis, the second rotating mechanism is provided with a surface used for bearing a workpiece, the second rotating mechanism can rotate around the axis of the second rotating mechanism, and the axis of the second rotating mechanism passes through the center of the surface and is perpendicular to the surface. The rotating axis of the second rotating mechanism intersects and is perpendicular to the rotating axis of the first rotating mechanism. The guide sleeve can move in the vertical direction; and the main shaft can move in the vertical direction, the main shaft is used for clamping the gun drill, and the gun drill can penetrate through the guide sleeve to conduct deep hole machining on the workpiece. According to the deep hole drilling machine tool, deep hole machining can be conducted on a workpiece at any space angle; the gun drill is guided and positioned through the guide sleeve, so that the machining precision can be improved; in the process of drilling inclined holes in a workpiece, the workpiece does not need to be transferred among multiple machines and does not need to be positioned and calibrated again, straight hole and inclined hole machining can be conducted on multiple faces of the workpiece on one machine tool by clamping the workpiece at a time, and therefore the machining efficiency can be improved.

The application relates to the technical field of handheld gun drills, and discloses a brushless motor mute gun drill, which comprises a gun body and a chuck, the inner wall of the gun body is fixedly connected with a driving motor, the outer wall of the driving motor is provided with a flow guide mechanism, the flow guide mechanism comprises a flow guide sleeve, the flow guide sleeve is sleeved in the gun body, a flow guide cavity is formed in the flow guide sleeve, baffles are fixedly connected to the cavity wall of the flow guide cavity and separate the flow guide cavity into different volume cavities, the baffles are provided with flow guide holes to communicate the inside of the flow guide cavity, the heat dissipation air reduces noise during flow in the different volume cavities in the flow guide cavity, and a flow distribution fan is arranged, which rotates along the inner wall of the flow guide sleeve. The flow guide mechanism is arranged to guide the heat dissipation air, the heat dissipation air flows in the flow guide cavities of different volumes separated by the baffles, the heat dissipation air is subjected to noise reduction, the noise generated by the driving motor is subjected to sound insulation, and the noise generated by the driving motor and the heat dissipation air is reduced.

The application relates to the technical field of handheld gun drills, and discloses a brushless motor mute gun drill, which comprises a gun body and a chuck, the inner wall of the gun body is fixedly connected with a driving motor, the outer wall of the driving motor is provided with a flow guide mechanism, the flow guide mechanism comprises a flow guide sleeve, the flow guide sleeve is sleeved in the gun body, a flow guide cavity is formed in the flow guide sleeve, baffles are fixedly connected to the cavity wall of the flow guide cavity and separate the flow guide cavity into different volume cavities, the baffles are provided with flow guide holes to communicate the inside of the flow guide cavity, the heat dissipation air reduces noise during flow in the different volume cavities in the flow guide cavity, and a flow distribution fan is arranged, which rotates along the inner wall of the flow guide sleeve. The flow guide mechanism is arranged to guide the heat dissipation air, the heat dissipation air flows in the flow guide cavities of different volumes separated by the baffles, the heat dissipation air is subjected to noise reduction, the noise generated by the driving motor is subjected to sound insulation, and the noise generated by the driving motor and the heat dissipation air is reduced.

To provide a body and a gun drill capable of smoothly drilling a deep hole by suppressing abrasion of the inner peripheral surface of the drilled hole due to deflection occurring during drilling. [Solution] The body 10 of a gun drill 100 that is rotated in one rotational direction R around a central axis Ax to drill a hole has one insert pocket 11 provided at the tip end into which a cutting insert 50 is attached, multiple front guide pad pockets 21, 22 provided at the tip end into which guide pads 61, 62 are attached, one discharge groove 31 extending from the insert pocket 11 to the rear end side and at least a portion of which is formed spirally, and at least one rear guide pad pocket 41 provided at the rear end side of the positions of the front guide pad pockets 21, 22 and into which a guide pad 71 is attached.

The invention discloses a machining technology of a precise deep hole part. The machining technology comprises the following steps that S10, blanking is conducted; s20, solid solution aging; s30, roughly turning an outer circle and chamfering; s40, a middle hole is drilled through a gun; s50, roughly turning the appearance; s60, stress relief aging is carried out; s70, roughly turning the outer circle; s80, the small end is subjected to semi-finish turning; s90, the large end is subjected to semi-finish turning; s100, honing an inner hole; s110, the outer circle is finely ground; and S120, the two ends are subjected to finish turning, and the precise deep hole part is obtained. Compared with the prior art, the technology has the following beneficial effects that 1, the technology is adopted for machining, and the requirement for the coaxiality of 0.02-0.03 of the outer circle of a deep hole in a drawing can be met after machining; 2, the coaxiality of the center hole and the outer circle after gun drill machining can be effectively rectified by adopting the expansion sleeve clamp to roughly turn the outer circle, the subsequent outer circle grinding allowance is reduced, and the machining efficiency is improved;

1. The name of this design product: Brushless Gun Drill (21V). 2. Purpose of this design product: This design product is used for drilling or deep hole processing. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model discloses an electric gun drill for intraosseous infusion. The electric gun drill comprises a shell; a mounting part and a handheld part are formed on the shell; a driving motor is mounted in the mounting part along a first straight line; a positioning hole is formed in a shell of the driving motor; a positioning piece is formed on the inner wall of the mounting part; a speed reducer is mounted at the end part of the driving motor; a driving part is fixed at the output end of the speed reducer; the driving piece is rotationally supported at the mounting end of the mounting part; a circuit board and a control switch are further mounted in the mounting part; two ends of a circuit of the control switch are electrically connected to the driving motor and the circuit board respectively; a battery is mounted in the handheld part along a second straight line; the battery is electrically connected to the circuit board; an indicating lamp electrically connected to the circuit board is arranged at one end, far away from the driving piece, of the mounting part; an adsorption magnet is arranged at the end, where the puncture needle is inserted, of the driving piece. The utility model has the technical effects of simple mounting structure, high structural precision, low cost and higher safety performance.

The present application relates to the technical field of drill bits, and discloses a DM gun drill bit, which comprises a drill rod and a mounting rod, a connecting piece is arranged above the drill rod, a first circular notch is formed in the connecting piece, a notch is formed below the first circular notch, a second circular notch is formed below the notch, drive notches are formed on the two sides of the second circular notch, a drive rod is arranged in the drive notches, two symmetrical wedge blocks are arranged in the first circular notch, and a circular mounting ring is arranged on the first circular notch. When the mounting rod is mounted in the first circular notch of the connecting piece, the mounting rod will extrude the moving rod to drive the drive rod to move out of the drill rod, so that the operation is facilitated; the mounting rod is rotated to the corresponding position, the wedge blocks are inserted into the moving notches under the action of the auxiliary components, the mounting rod is stably limited, and the connection is reliable; meanwhile, the movement of the wedge blocks drives the knocking rod to knock the inner wall of the mounting notch to make a sound, the mounting is prompted to be completed, the efficiency and accuracy are improved, and the operation is convenient.

The utility model relates to the technical field of gun drills, and discloses a deep hole alloy gun drill which comprises an installation head, two movable shells are fixedly installed on one side of the installation head, the two movable shells are arranged in an arc shape, locking heads are installed on the inner walls of the two movable shells respectively in a sliding mode, and two positioning blocks are fixedly connected to the inner wall of the installation head. The gun handle is slidably connected to the inner wall of the mounting head, the positioning block slidably penetrates into the gun handle, the locking head slidably penetrates into the inner wall of the outer side of the gun handle, the gun handle is inserted into the mounting head, the positioning block can preliminarily position the gun handle, and the situation that the gun handle slips and rotates during working after being clamped is prevented; and then air is supplied to the interior of the movable shell through an external equipment air supply mechanism, the electromagnetic valve can close and open the connecting pipe to prevent the locking head from moving, then the locking head is inserted into the outer wall of the gun handle, the locking head can be locked and positioned, the gun handle is convenient to install, and installation is portable and rapid.

The utility model provides a gun drill with high machining efficiency, and belongs to the technical field of gun drills. The problem that when an existing drilling machine completes machining every time, a workpiece needs to be clamped again, and the machining work efficiency is affected is solved. The gun drill high in machining efficiency comprises a machine body base, a machining device used for machining and a clamping device used for clamping parts are fixedly arranged on the machine body base, the machining device is arranged on the left side of the machine body base, the clamping device is arranged on the right side of the machine body base, and a fixing base is arranged at the position, opposite to the machining device, of the machine body base. A first sliding seat is arranged on the fixing seat, a stand column for installation of the machining device is arranged on the first sliding seat, the machining device is arranged on the stand column through a second sliding seat and can move up and down on the stand column, the clamping device is fixedly installed on the machine body base through an installation seat, and the clamping device is composed of a fixing clamp, a first adjusting piece and a second adjusting piece. The utility model has the advantage of high processing efficiency.

The invention relates to the technical field of deep hole machining equipment, in particular to a tool breakage alarm device for a deep hole machining drill, which comprises a deep hole drill platform, and a tool breakage judgment module and a blockage monitoring module are arranged on the deep hole drill platform; the cutter breaking judgment module comprises a target reflection assembly, a microwave distance measurement assembly and a temperature thermal compensation module; the target reflection assemblies are arranged on a drill rod and a tool bit of the gun drill respectively, and the microwave distance measurement assembly and the temperature thermal compensation module are arranged in the oil base; a blocking monitoring module and an active unblocking module are arranged on the deep hole drilling platform; the blockage monitoring module is set as an oil pressure sensor; the oil pressure sensor is mounted in an outlet pipeline of the cutting liquid pump; the active unblocking module is arranged to be a high-frequency electromagnetic pulse valve, and the high-frequency electromagnetic pulse valve is arranged in an outlet pipeline of the chip liquid pump. The technical problems that in the traditional deep hole machining process, the cutter breaking condition and the blocking condition are difficult to distinguish, misinformation and missing information are generated, and active unblocking cannot be achieved are solved.

The utility model provides a machine clamp split type gun drill, relates to gun drill technical field, including drill bit, cutting blade and connecting sleeve, drill bit handle end is equipped with spacing hole, connecting sleeve internal sliding connection spacing rod, spacing disk is fixed installation spacing rod surface, the spacing rod surface is sleeved with spring. A handle is pulled to enable a connecting block to drive a limiting rod to move backwards, meanwhile, a connecting plate can drive a rack to move, due to the fact that the rack is meshed with a gear, the gear drives the rack on the other side to move, the limiting rod can slide out of a limiting hole, and at the moment, a drill bit can be taken out of a connecting sleeve; therefore, the drill bit can be quickly disassembled and replaced, equipment can flexibly meet different machining requirements, the adaptability of a production line is improved, it is ensured that the most suitable drill bit is used all the time in the machining process, and the operation risk caused by the drill bit problem is avoided.

1. Name of the product in this design: Gun Drill (Mini Cannon). 2. Purpose of this design: For drilling and screw assembly / disassembly. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to a high-precision pistol drill which comprises a pistol drill body, an output shaft, a drill bit assembly and a high-precision measuring assembly arranged at the end of the pistol drill body, and the high-precision measuring assembly comprises a mounting support, a first connecting rod and a second connecting rod, a positioning plane attached to a plane to be punched is arranged on the side wall of the mounting bracket; the length measuring mechanism is rotationally mounted on the mounting bracket and is used for measuring the relative distance in the drilling process; the positioning block is mounted on the length measuring mechanism; and the positioning rod is slidably mounted on the positioning block. The drilling device has the effect that accurate drilling can be carried out after direct measurement according to the requirement for the distance between two holes.

The utility model discloses a gun drill for deep hole processing, which relates to the technical field of gun drills, and comprises a cutter bar, a cutter head and a cutter handle which are mutually connected and fixed, the surface of the cutter bar and the surface of the cutter head are jointly provided with a chip groove, and the setting angle of the chip groove is 125-135 degrees. According to the gun drill for deep hole machining, the angle of the chip groove ranges from 125 degrees to 135 degrees, compared with a chip groove of a traditional gun drill, the angle is greatly increased, and the mode of increasing the grooving angle of the chip groove has the advantages that the grooving angle is increased, metal chips are easy to discharge, the working efficiency is high, the cooling effect is good, the service life of a drill bit is prolonged, and the service life of the drill bit is prolonged. And in addition, the cutting edge is provided with the first cutting edge, the second cutting edge and the third cutting edge, so that the more sharp surfaces are, the more metal is drilled during drilling.

The utility model relates to the technical field of gun drill brushing structures, in particular to a disc flat brush quick connecting rod structure for a handheld gun drill, which comprises a main body rod piece and is characterized in that the diameter of the main body rod piece is 150 + / -2mm, the main body rod piece comprises a hexagonal rod, one end of the hexagonal rod is connected with a main body sleeve, one end of the main body sleeve is connected with a sliding sleeve, and the other end of the main body sleeve is connected with a handle. A steel wire is arranged on one side of the interior of the sliding sleeve, an elastic limiting mechanism is arranged on one side of the steel wire, a magnetic sleeve is arranged on one side of the interior of the sliding sleeve, and magnetic steel is arranged in the magnetic sleeve. Rapid replacement is achieved through magnetic attraction pre-positioning and elastic secondary locking, and a tool hole is automatically centered through magnetic attraction force guiding; after the 65Mn steel spring is subjected to a fatigue test, the elasticity attenuation is less than 5%, and 8N pressing force is generated to complete mechanical locking; triple protection of electrophoretic paint (20 microns), chromium plating (15 microns) and anodic oxidation (15 microns) passes a neutral salt spray test for 1000 hours; the N20 magnetic steel enables the vibration of the hand to be reduced to 0.8 m / s < 2 >; the diamond-shaped surface enables the holding force to be increased to 120 N (70 N compared with a smooth surface).

The utility model relates to the technical field of drill bit machining, and discloses a gun drill coping fast detection comparison block which comprises a body, a plurality of detection notches are formed in the body, each detection notch is provided with a limiting face, an outer blade detection face and an inner blade detection face, the outer blade detection faces are connected with the inner blade detection faces, and the limiting faces and the outer blade detection faces are connected with the limiting faces respectively. The limiting surface is used for limiting the gun drill tip; the outer edge detection surface is used for detecting the angle of the outer edge of the gun drill tip; the inner edge detection surface is used for detecting the angle of the gun drill tip inner edge. On the premise that grinding accuracy and efficiency are guaranteed, a large number of manpower resources and production preparation time are saved, production cost is reduced, and the drill bit grinding device is extremely applicable to grinding of drill bits of the same kind; the device is small and portable, can be used anytime and anywhere, and avoids the complexity of using professional equipment; manufacturing is simple, and machining cost is low; and quick responsiveness is achieved, tool nose parameters can be compared immediately after coping, and bad points can be repaired in time.

1. Name of the designed product: lithium electric gun drill (16.8v). 2. Use of the designed product: the designed product is used for electric tools for drilling, screwing, etc. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The utility model relates to punch device technical field especially relates to a kind of punch device for building board processing, including hand gun drill body and the drill bit for being used to carry out the drilling of building board, hand gun drill body includes the detachable connection of drill head driving element and the power handle integrated with drill head driving element, power handle has the press switch for controlling drill head driving element to drive drill head rotation, the front of drill head driving element is also provided with the support that can be passed through by drill head, support is connected between hand gun drill body by adjustable assembly, adjustable assembly includes the fixed connection of screw sleeve with support, the screw thread cooperation of screw rod between screw sleeve, the fixed connection of sliding sleeve with support and the guide rod body of sliding connection with sliding sleeve, it can assist personnel to accurately grasp the depth of drilling by setting support and adjusting assembly, solve the problem that depth is not easy to accurately grasp in the existing punching process.

1. Name of the product in this design: Handheld Gun Drill (8V Lithium Battery). 2. Purpose of this design: For drilling or deep hole machining. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model relates to the technical field of deep hole drilling and milling machine supporting frames, and discloses a numerical control deep hole drilling and milling machine supporting frame structure which comprises a drilling and milling workbench and a gun drill assembly, a stable supporting device is arranged on the rear side of the surface of the drilling and milling workbench and comprises a gray cast iron supporting frame and a rubber shock pad, and a starting rotating motor is arranged on the rear side of the surface of the drilling and milling workbench. The driving gear and the driven gear are driven to rotate, the threaded sliding block is promoted to drive the stabilizing plate and the gun drill assembly to move downwards, the limiting block stably slides in the limiting groove, the sliding block moves in the sliding groove, the threaded rod rotates at the uniform angular speed, and the threaded sliding block conducts linear motion, so that working parts connected with the threaded rod can stably move; when drilling operation is carried out, the two spring columns at the top of the stabilizing plate can effectively absorb part of high-frequency vibration generated in the operation and cutting process of the drilling machine, and therefore the problem that due to shaking of the supporting frame in the drilling process or vibration generated by the drilling machine, the position precision is insufficient is solved.

The invention provides a diesel engine cylinder cover small-angle crossed deep hole machining method and belongs to the technical field of machining. The method comprises the following steps: firstly, clamping a workpiece on a special fixture by taking a central oil injector hole of the cylinder cover as a process positioning reference, and enabling the center of the fixture to coincide with the center of a B axis of a machine tool; then, a specially-made hard alloy composite platform guide drill is adopted for machining deep guide holes of the two cross holes step by step, the guide drill has the front end centering function and the rear end long guiding function, and initial sliding of a tool and deflection in the machining process can be effectively prevented; and finally, a gun drill is used for completing final depth machining along the guide hole. Through the innovative tool design and the machining sequence of completing one hole and then guiding another hole, the problems that in the small-angle crossed deep hole machining process, a tool is prone to deflection and breakage are solved, and high-precision, high-efficiency and high-reliability machining is achieved.

The invention provides a deep hole machining method and device, and belongs to the technical field of machining. The machining method comprises the steps that a machining device is provided, the machining device comprises n gun drills, the lengths of the gun drills are sequentially increased from the first gun drill to the nth gun drill, and the diameters of the gun drills are sequentially decreased; and the gun drills from the first gun drill to the nth gun drill are sequentially adopted to conduct progressive drilling on the surface of the workpiece to be machined till the drilling depth reaches the set depth. The deep hole machining difficulty can be reduced, and the machining precision is improved.

The utility model discloses a gun drill welding fixture which comprises a welding fixture body, the welding fixture body comprises a base and a heating pipe groove, and the heating pipe groove is formed in the position, close to the middle, of one end of the base; the supporting assembly comprises a movable groove, a fixing plate, a hand wheel, a threaded rod, an iron wedge and a second V-shaped block, the movable groove is formed in the middle of the upper surface of the base and communicates with the heating pipe groove, the fixing plate is fixed to the side edge of the base, the threaded rod is in threaded connection with the middle of the fixing plate and penetrates through and is rotationally connected to the side edge of the base, and the hand wheel fixes one end of the threaded rod. The other end of the threaded rod is rotationally connected to the middle of the side edge of the wedge, and the second V-shaped block is placed in the movable groove. The utility model relates to a welding fixture, and aims to solve the problems that the adjustment (center height of a handle and a blade) of the conventional welding fixture is positioned below a heating pipe and on the lower surface of a base, the operation is very inconvenient, and the conventional welding fixture is too close to the heating pipe (a copper pipe) and cannot be used and replaced due to deformation caused by long-term use.

The invention discloses a four-head drilling machine for metal part machining, and relates to the technical field of machining drilling machines, the four-head drilling machine comprises a machine tool, four sets of gun drills, a guide table and a clamping mechanism, the guide table is fixed on the machine tool, the clamping mechanism is installed on the guide table, the four sets of gun drills are arranged on the two sides of the guide table, and the clamping mechanism is installed on the guide table. A collecting groove is formed in the guide table and used for collecting falling chippings, a plurality of rotating shafts are rotationally arranged in the collecting groove, the two ends of each rotating shaft penetrate out of the two side wall faces of the collecting groove, the rotating shafts are sleeved with chipping wheels, a plurality of first screen holes are formed in the circumference of the surface of each chipping wheel, and the adjacent chipping wheels are rotationally matched. An air exhaust groove is formed in the middle of the rotating shaft, one end of the air exhaust groove is of an open structure, a plurality of inlets are formed in the lower side surface of the rotating shaft at intervals, the open end of the rotating shaft is externally connected with an extraction device, and the extraction device is connected with a recycling box. The device can efficiently screen and immediately recycle the chippings.

The application discloses a four-head drilling machine for metal piece machining, and relates to the technical field of machining drilling machines.The four-head drilling machine comprises a machine tool, four groups of gun drills, a guide table and a clamping mechanism, the guide table is fixed on the machine tool, the clamping mechanism is installed on the guide table, the four groups of gun drills are arranged on the two sides of the guide table, a collecting groove is formed in the guide table and is used for collecting falling chippings, a plurality of rotating shafts are rotatably arranged in the collecting groove, the rotating shafts pass through the two side walls of the collecting groove at two ends, a chip removal wheel is arranged on the rotating shaft, a plurality of sieve holes are formed in the surface of the chip removal wheel, the adjacent chip removal wheels are rotationally connected, a suction groove is formed in the middle of the rotating shaft, one end of the suction groove is of an open structure, a plurality of inlets are formed in the lower surface of the rotating shaft at intervals, a suction device is arranged outside the open end of the rotating shaft, and the suction device is connected with a recovery box.The four-head drilling machine can efficiently screen and instantly recover chippings.

The utility model discloses a deep hole machining gun drill structure which comprises a drill rod body, a drill handle used for installation is sleeved outside the rear end portion of the drill rod body, a supporting belt is arranged on the front section portion of the drill rod body, an alloy drill tip is arranged on the front end portion of the supporting belt, and the outer diameter of the drill rod body, the outer diameter of the supporting belt and the outer diameter of the alloy drill tip are sequentially increased. Inclined surface transition is adopted at the transition position, two spiral grooves are symmetrically formed in the alloy drill tip and the supporting belt, straight grooves are symmetrically formed in the drill rod body, and the spiral grooves are communicated with the straight grooves to be used for chip removal. The supporting belt and the alloy drill tip are matched and combined, the self-locking type alloy drill tip is provided with double blades, machining efficiency is improved by 2-3 times, a blade core of the drill tip is in a self-centering type, coaxiality of machined holes is guaranteed, the machining double diameter can be deeper than before, a chip groove in the front portion is a small-angle spiral groove, and a straight groove is formed in the rear portion. And the body is a light shakeproof material cutter bar, so that the vibration generated in the machining process can be reduced.

1. Name of the designed product: lithium battery gun drill (21v). 2. Use of the designed product: used for drilling of various materials and installation and removal of various screws. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.