46 results about "Drill bit shank" patented technology

A round-shank bit for a coal cutting machine or the like, having a bit head and a bit shank, wherein the bit head has a bit tip, maintained by a base element in a receptacle of the bit head. Starting at the base element, the bit tip tapers in a direction toward the free end of the bit tip, wherein the base element forms a maximum diameter of the bit tip, and wherein the bit tip has recesses on its outer contour. In order to assure good rotational behavior over the entire length of the operating time, the base element has the recesses on an outer circumference forming the maximum diameter.

A pressurized fluid flow system for a normal circulation down-the-hole hammer comprises a cylinder coaxially disposed in between an outer casing and a piston that reciprocates due to changes in pressure of the pressurized fluid contained inside of a front chamber and a rear chamber located at opposites sides of the piston, wherein the flow into and out of these chambers is controlled solely by the overlap or relative position of the piston and the cylinder as a supply chamber and a discharge chamber defined by recesses on the inner surface of the outer casing and separated by a dividing wall control the flow of pressurized fluid in and out of the front and rear chambers the. A down-the-hole normal circulation hammer with this system comprises a drill bit with one or more flushing passages that extend from channels cooperatively formed between splines on the inner surface of the driver sub and splines on the outer surface of the drill bit shank, to the front face of the drill bit for discharging the pressurized fluid out of the hammer.

Apparatuses and methods for adjusting weight-on-bit/torque-on-bit sensor bias in a drill bit. The apparatus may include a bit adjustment device disposed at least partially in a cavity in a bit shank. The bit adjustment device includes electronics and sensors for estimating a weight-on-bit/torque-on-bit bias. The method includes adjusting the weight-on-bit/torque-on-bit sensor bias of a drill bit. The method may include adjusting force on a bit adjustment device to adjust weight-on-bit/torque-on-bit sensor bias. The method may also include securing the bit adjustment device within the cavity of the bit shank after the desired weight-on-bit/torque-on-bit sensor bias has been achieved.

A shank configuration for rotary drill bits is disclosed for positioning of the shank in relation to the bit body. A tapered surface or feature of the shank may be configured and sized to matingly engage a complementarily shaped surface or feature of the drill bit body and thereby become centered or positioned in relation thereto. A deformable element may be disposed between the shank and bit body. Also, the shank may comprise a material having a carbon equivalent of less than about 0.35%. A multi-pass weld procedure may be employed to affix the shank and bit body to one another wherein welds may be formed so that one weld originates at a circumferential position that differs from the origination circumferential position of its immediately preceding weld by at least about 90°. Further, a stress state may be developed within the multi-pass weld. A method of manufacture is also disclosed.

The invention discloses a method of V-shaped welding of a solid carbide drill and the solid carbide drill of the method. The V-shaped welding method comprises the following steps of: selecting corresponding hard alloy bar stocks; determining the lengths of a drill blade part and a drill handle part; carrying out centreless grinding to alloy bar stocks of the drill blade part; cutting the drill blade parts and V-shaped welding parts on the alloy bar stocks by a wire cutting machine; milling a stress relief groove; carrying out heat treatment to the drill handle part, wherein the hardness is 50HRC (rockwell hardness C); carrying out pre-heating to the drill blade part; clamping the drill handle part at the bottom of a special welding fixture by the special welding fixture, and carrying out high-frequency heating; and carrying out heat preservation to the welded solid carbide drill. The structure of the solid carbide drill is as follows: a V-shaped welding part, which is a V-shaped groove, is arranged at the drill handle part, the V-shaped angle is 120 degrees, and the top of the V-shaped angle is the stress relief groove. The method of the V-shaped welding of the solid carbide drill has the following advantages that: the material cost of cutting tools is reduced, and the integral performance is improved. The solid carbide drill is widely applied, so that a large quantity of resources can be saved, and great economic and social benefits can be obtained.

The invention relates to a micro-textured BTA deep-hole drill bit and a preparation process thereof. A cutter body is included, the surface of the cutter body is provided with a guide block, the fracture surface of the cutter body is provided with cutter teeth, the cutter teeth include internal teeth, center teeth and external teeth from top to bottom, all cutter teeth are staggered, and a certainoverlap amount is reserved; and a chip removal hole is formed in the middle of the cutter body, the other end of the cutter body comprises a drill bit shank, the outer portion of the drill bit shankis provided with threads, and a micro-texture is arranged on the front cutter surface of the cutter teeth. By means of the micro-textured BTA deep-hole drill bit and the preparation process, through the surface topography innovation of the micro-texture, the new micro-texture deep-hole drill bit with high durability is designed, and the purpose of reducing cutting heat is achieved by reducing friction and reducing cutter abrasion.

An apparatus is an implant-dentist more readily identifiable visual segregation amongst their oral-surgery arbor-tools used conjunction with a conventional hand-held power/rotary-tool. The arbor-tools generally has at least a tri-echeloned set, wherein are included progressions of drill-bit lengths and companion thread-taps appearing in three different diameters. Additionally, the drill-bit shanks are optionally provided with a radial-flange serving as an automatic depth-stop device and these radial-flanges may include a distinctive annular-marker device serving to readily indicate the length of the selected drill-bit, thereby obviating usual procedure of stopping to confirm via the obscure conventional alpha-numeric indicia.

The invention discloses a lifter bore drilling cutter assembly and a lifter bore machining method. The cutter assembly comprises an internal-cooled pilot step drill bit and a heavy-metal hot shrink-fit shank. The internal-cooled pilot step drill bit is of a step structure with internal cooling holes and specifically comprises a core bit, an expanding section, a chamfering section and a drill bit shank, wherein the diameter of the core bit is the smallest to enable the core bit to avoid cross main oil passage holes when the core bit drills the bottom hole of the lifter bore; the internal cooling holes are formed in the end part of the core bit; the expanding section is close to the core bit; the chamfering section is connected with the expanding section; and the internal-cooled pilot step drill bit is installed on the heavy-metal hot shrink-fit shank through the drill bit shank. By machining the bottom hole of the lifter bore through the heavy-metal hot shrink-fit shank in cooperation with internal-cooled pilot step drill bit, the problems that the cutter is unevenly stressed and the elliptical aperture is apt to occur during the machining of offset cross lifter bores are well solved. In addition, by using a diamond honing reamer to hone and ream the lifter hole, the requirement on the roughness of the lifter hole is satisfied and the durability of the cutter is improved.

The invention discloses a composite multi-functional rock-soil auger, which comprises a helical blade, an impact hammer, a sleeve body and a drill bit. An impact hammer is arranged inside the sleeve body, and an impact drill bit is connected to the bottom of the sleeve body; a drill bit handle is installed in the sleeve body at the bottom end of the impact hammer, and a number of air holes are opened on the side wall of the drill bit; Functional rock-soil auger drilling tools greatly reduce the construction cost, which is only 1/5 of the original construction cost; the micro-impact technology effectively avoids the disturbance of the impact force on the bedrock, ensures the bearing capacity of the pile foundation, and avoids At the same time, the new product is safer and has the least loss on drilling equipment; the bottom of the drill bit is designed with a guiding function, which changes the direction of work to rotary strike, and adopts micro-impact and less-impact technology to greatly reduce The damage to the bedrock by the impact force is reduced, and the quality of drilling is improved.

The invention discloses a screw tap, in particular a hot melting drilling tapping thread forming tap. The hot melting drilling tapping thread forming tap comprises a handle part, a tapping drill bit and a hot melting drill bit, wherein the handle part, the tapping drill bit and the hot melting drill bit are integrally molded; the hot melting drill bit is positioned at the front end; the tapping drill bit is positioned in the middle; the handle part is positioned at the tail end; the diameter of the tapping drill bit is larger than the diameter of the hot melting drill bit; the diameter of the handle part is smaller than the diameter of the hot melting drill bit; and the tapping drill bit is a thread forming tap. The hot melting drilling tapping thread forming tap combines two procedures of hot melting drilling and internal thread processing as a whole, and has the advantages of simplicity, convenience, high positioning precision, good thread quality and high working efficiency compared with traditional processing by two tools (the hot melting drill bit and the thread forming tap); as the thread forming tap is used for chipless processing, molded surfaces of threads are full, and the thread connecting strength is improved; the hot melting drilling tapping thread forming tap is an internal thread processing tool with excellent performance, and in particular, is suitable for drilling and tapping various black metals, stainless steels and such nonferrous metals as copper and aluminum alloys.

The invention belongs to the field of drill bits and particularly relates to a welded alloy drill comprising a drill bit shank. A drill bit connecting portion is arranged at one end of the drill bit shank, a drill bit positioning portion is arranged at the other end of the drill bit shank, an alloy drill body is welded to the drill bit connecting portion, a drill point is arranged at the end of the alloy drill body, and drilling retaining plates are arranged on the peripheral surface of the joint of the alloy drill body and the drill bit connecting portion. The welded alloy drill has the advantages that drillings can be retained through the drillings retaining plates, and cost can be saved as the drill bit is welded.

A high-performance antiskid shank shrinkage drill bit comprises a drill bit body and a clamping device. The drill bit body is a twist bit. Cutting edges are arranged on the drill bit body and intersect with one another. The clamping device is arranged around the drill bit body and is a jaw, and the jaw is a four-foot jaw and is provided with fixed pieces. The fixed pieces are rectangular fixed blocks. Absorption pieces are arranged on the rectangular fixed blocks and distributed on the jaw. The clamping device is arranged on the drill bit, and therefore machining of the drill bit can be facilitated, and the situation that the drill bit skids on a workpiece, and consequently the quality of the outer surface of the workpiece is influenced can be avoided; meanwhile, the locating effect of the drill bit can be improved, the drill bit can be located conveniently by itself, and the work efficiency of the drill bit is improved; and a sheath is arranged on a connecting shank and can protect the connecting shank, and the connecting shank is prevented from being rusted.

The invention discloses a tool for removing orifice burrs. The tool comprises a handle, a connecting rod, a drill bit, a collet chuck and a tightening cover. One end of the connecting rod is vertically fixed to the middle of the side face of the handle. The connecting rod is provided with an axial drill bit shank insertion hole, and a conical hole is formed in the outer end of the drill bit shank insertion hole. A drill bit insertion hole is formed in the axial direction of the collet chuck. The collet chuck has elasticity and can achieve shrinkage distortion so that the drill bit can be clamped. One end of the periphery of the collet chuck is provided with an insertion outer conical surface matched with the conical hole of the connecting rod. A clamping groove is formed in the upper middle portion of the periphery of the collet chuck. A locking outer conical surface is arranged at the other end of the periphery of the collet chuck. One end of the inner circumference of the tightening cover is fixedly connected with the other end of the connecting rod. The upper middle portion of the inner circumference of the tightening cover is provided with a clamping boss matched with the clamping groove of the collet chuck, and the other end of the inner circumference of the tightening cover is provided with a pressing conical surface matched with the locking outer conical surface of the clamping collet chuck. By means of the tool for removing the orifice burrs, the orifice burrs can be removed thoroughly; and moreover, the orifice wall cannot be scratched, consumed time is short, and burr removing efficiency is high.

The invention discloses a four-edged drill for making elliptical holes, which comprises a tip, a drill body, a casing, a pin opening, a cutting device, drill teeth, a drill handle, a connecting device and a fixing hole. The beneficial effects of the present invention are: the drill has a compact structure and is easy to use. The drill body is a four-edged drill, and blades are arranged in an array outside the cutting device, which can improve chip breaking effect. The tip is a cone structure, and the cutting device is an eccentric structure. It is used to make elliptical holes, and the drill teeth are equipped with chip grooves. When the drill bit is advanced, it prevents debris from clogging and makes the advancement more difficult. The surface of the drill body is coated with a metal layer, which has high smoothness and drilling accuracy. The connecting device There is a pin opening on one side, which can be fixed by pins. The inner side of the fixing hole is provided with threads, which can firmly install the drill bit on the drilling machine to prevent the drill bit from moving. There is a buckle inside the casing, and the drill teeth are installed on the drill handle. Inside the top, the drill teeth can rotate flexibly and have strong stability during work.

A router bit vise that holds and prevents the rotation of a router bit in a selected direction. It includes a tool housing and a cylindrical throughbore. Located in the throughbore is a one-way clutch assembly sized to accept a router bit shank. When inserted into the one-way clutch passageway, the router bit shank is engaged by the one-way clutch mechanism preventing movement in one rotational sense and allowing freewheeling movement in the opposite sense. No externally applied clamping force is required. With the router bit shank engaged with the one-way clutch circumferential rotation of the router bit is controlled allowing for bit maintenance, including cleaning, sharpening and most importantly enabling the application of the torque necessary to tighten or loosen a router bit fastener with no potential for shank slipping or damage.

The invention relates to the technical field of tools, in particular to a taper shank twist drill. The taper shank twist drill comprises a drill bit body and a taper shank, wherein the drill bit body comprises a drill bit working part and a drill bit shank part; the taper shank is arranged on the drill bit shank part in a sleeving manner; the taper shank twist drill is characterized in that the drill bit working part is provided with three spiral cutting edges, wherein a chip discharge groove is formed between every two spiral cutting edges; a transverse chip cutting edge is arranged in each chip discharge groove; the drill bit working part is taper; the drill bit shank part is connected with the taper shank through threads; a radiating component is arranged in the upper part of the taper shank; the taper shank below the radiating component is provided with a clamping groove; a supporting plate is clamped on the clamping groove; a communicating through hole is formed between the supporting plate and the bottom of the drill bit working part; the radiating component is fixedly arranged on the supporting plate and comprises an aluminum radiating cylinder; the radiating cylinder is uniformly provided with radiating fins; the taper shank on the outer side of the radiating cylinder is provided with a plurality of ventilation holes. The twist drill has the advantages of good machining efficiency, good chip discharge effect, contribution to clamping and low cost.

The invention relates to the technical field of cutting tools, in particular to a three-sharp wood drill. The three-sharp wood drill comprises a drill shank, a drill bit, and a drill neck for connecting the drill shank with the drill bit, wherein the drill neck is cone-shaped, and the drill neck and the drill shank are integrally formed; two spiral cutting edges are arranged on the circumference surface of the drill shank, and edge points are respectively arranged at the edges and the bottoms of the cutting edges; outwards projecting tool noses are respectively arranged at the joints of the edge points at the edges and the bottoms of the cutting edges, and the inner tool faces of the two tool noses respectively extend towards two opposite directions. The three-sharp wood drill is stable in centering, a tool and a handle are hardly broken, and the production cost is low.

The invention provides a composite drill bit. The composite drill bit comprises a drill bit handle, at least two sets of roller bits and a PDC drill bit, and the drill bit handle is cylindrical, and at least two sets of bit legs are oppositely arranged at the top end of the drill bit handle; at least two sets of roller bits are rotationally arranged on the bit legs at the top end of the bit handle correspondingly, and each roller bit comprises a roller bit body rotationally connected to the top end of the drill bit handle, a conical spherical tooth arranged on the roller bit body and a protective tooth annularly arranged on the roller bit body; and the PDC drill bit is clamped between the roller bit bodies, the PDC drill bit comprises a plurality of sets of blades, each set of blades comprises two wing arms in the acute angle direction, each set of wing arms extend in the circumferential direction along the center axis of the drill bit handle, and a plurality of sets of PDC cutting teeth are evenly embedded in at least one side of each set of wing arms. According to the composite drill bit, the drilling efficiency is greatly improved through organic composite circulation of the roller bits and the PDC drill bit.