397results about "Reaming tools" patented technology

A stop for use with an electric drill bit, the stop having at least one threaded sleeve for positioning the stop relative to a surface into which the drill bit will extend. The stop may have both an inner and an outer sleeve. The sleeves are mounted coaxially, one inside the other about the drill bit. One of the sleeves, preferably the inner sleeve, provides coarse adjustment of the position of the shoulder relative to the tip of the bit, while the other, preferably the outer sleeve, provides fine adjustment of the position of the shoulder relative to the top of the bit.

The invention discloses a universal floating hinge sleeve, and relates to the field of high-precision reaming machining. The problems that an existing knife pouch cannot provide relatively stable rigidity, the possibility that the knife pouch does not enter a hole due to the too large movement range is caused, and the knife pouch is too complex in structure and not suitable for manufacturing are solved. A first cylinder and a second cylinder which are coaxially arranged are sequentially arranged on the upper portion of a cutter connecting part in the circumferential direction from bottom to top, and a first round hole and a second round hole which are matched with the first cylinder and the second cylinder are sequentially formed in the center of the lower end face of a cutter handle connecting part from bottom to top in the axial direction. The first cylinder and the second cylinder are inserted into the first round hole and the second round hole respectively, the hinge sleeve connecting flange is arranged in the middle of the cutter connecting part in a sleeved mode, the upper surface of the hinge sleeve connecting flange abuts against the lower surface of the first cylinder, and the hinge sleeve connecting flange is connected with the bottom of the cutter handle connecting part through a plurality of hinge sleeve connecting pieces. The universal floating hinge sleeve is used for connecting a taper-shank reamer and a BT50 turn Morse cutter handle.

A cutting tool system may include a tool body, a flexible internal pressure chamber, and at least one cutting edge. The flexible internal pressure chamber may be disposed within the tool body. The at least one cutting edge may be attached to the tool body. The flexible internal pressure chamber may be configured to elastically deform, due to pressure within the flexible internal pressure chamber, which in turn may deform the tool body, which in turn may change a position of the at least one cutting edge attached to the tool body.

The utility model discloses a non-standard reamer with an angle R at the root. The non-standard reamer comprises a reamer rod, and a reamer handle is arranged below the reamer rod. A cutting blade is installed below the cutter handle, an R angle is arranged at the end of the cutting blade, an arc-shaped groove is formed in the cutter handle, a heat dissipation groove is formed in the cutter handle, the arc-shaped groove is communicated with the heat dissipation groove, the heat dissipation groove is annularly formed, and an auxiliary assembly is installed on the outer side of the heat dissipation groove. According to the non-standard reamer with the R angle at the root, the arranged cutting blades can be conveniently matched with the reamer handle for machining, machining can be conducted at the same time through the non-standard design of reaming and back chipping, the problem that the service life is shortened due to inconsistent abrasion speeds is solved, and the problem that the maintenance cost is increased due to separate treatment of the cutting edges is solved; the R angle on the cutting piece can be conveniently reamed and formed, the problem that the overall machining time is prolonged due to the fact that a tool needs to be replaced is solved, and the problem that existing tool connecting marks are troublesome to process is solved.

The utility model provides a reamer for machining an inner hole in a satellite carbon fiber part. The reamer comprises a clamping part, a cutter bar, a first side cutting edge, a second side cutting edge and a notch. The cutter bar is connected with the clamping part and comprises a side cutting part and a bottom face, and a chamfer is formed between the side cutting part and the bottom face. The first side cutting edge is arranged at the position, close to the bottom face, of the side cutting part, the chamfer is connected with the first end of the first side cutting edge and the outer edge of the bottom face, and the top surface of the first side cutting edge is an arc face. The at least one second side cutting edge is arranged at the position, deviating from the bottom face, of the side cutting part, the top surface of the second side cutting edge is provided with a protruding edge, and the protruding edge and the second side cutting edge extend in the same direction. The notch is formed in the side cutting part and located between the first side cutting edge and the second side cutting edge. By means of segmented cutting, abrasion to the reamer can be reduced, cutting efficiency can be guaranteed, and meanwhile the accuracy of the overall position of an inner hole of a part is improved.

The invention relates to the technical field of metal cutting tools, in particular to a novel spiral groove hard alloy reaming tool and an efficient chip removal structure thereof.The novel spiral groove hard alloy reaming tool comprises a reamer and a main cutting edge arranged at the bottom of the reamer, a cutting set is arranged on the lower portion of the reamer and comprises a first chip removal groove and a second chip removal groove, and the first chip removal groove and the second chip removal groove are formed around the surface of the reamer; the size of the first chip groove is larger than that of the second chip groove. Wherein the edge is lower than the auxiliary cutting edge, and an inclined plane included angle alpha used for assisting chippings to slide into the second chip groove is formed between the auxiliary cutting edge and the edge; the auxiliary cutting edge is flush with the surface of the reamer and is flush with the two ends of the main cutting edge, through the design of the included angle alpha between the edge of the first chip discharging groove and the auxiliary cutting edge and the cooperation of the stepped structure that the edge is lower than the auxiliary cutting edge, the retention space of chips in a transition area is thoroughly eliminated, spiral scratches caused by chip scraping of a traditional cutter are avoided, and the service life of the reamer is prolonged. And a high-precision reference surface is provided for subsequent tapping.

A method for producing a cutting tool including a tool body including a hard coating, the method comprising: applying the hard coating to the tool body at least in an area of a cutting edge, a flank, and a chipping surface; depositing the hard coating on a surface of the tool body, of the cutting tool in an area of the cutting edge, of the flank adjacent to the cutting edge, and of the chipping surface adjacent to the cutting edge; sharpening the cutting edge that is provided with the hard coating and that forms a dull rounded edge by partially removing the hard coating in the area of the flank of the cutting edge by laser machining to form a sharpened cutting edge so that an angle δ is enclosed between a first geometric plane in which a surface of the tool body extends.

A reamer includes a shank portion extending from a rear end and a cutting portion extending from the shank portion to a front end. The cutting portion includes a plurality of cutting teeth separated by gashes. Each cutting tooth having a cutting edge extending in a longitudinal direction from the front end to proximate the shank portion. The cutting portion includes a margin trailing each cutting edge and extends along each cutting edge to proximate the shank portion. Each cutting tooth also has a primary relief formed between the cutting edge and the front end and a secondary relief extending longitudinally between the margin of one cutting tooth to the cutting edge of an adjacent cutting tooth. A width, W, of each cutting tooth increases in a radially outward direction with respect to the central, longitudinal axis when viewed from the front end of the reamer.

The utility model is suitable for the technical field of agricultural tractor transmission shaft connecting piece production, and provides an agricultural tractor transmission shaft connecting piece production reaming device which comprises a bottom plate, a plurality of first vertical plates and a plurality of second vertical plates. The first screw rods are rotationally mounted on the plurality of first vertical plates; the first servo motor is fixedly mounted on the bottom plate and is connected with the first screw rod; the displacement plate is arranged on the first screw rod in a threaded and sleeving manner; and the multiple reaming machining mechanisms are arranged on the displacement plate, and the multiple reaming machining mechanisms are used for conducting reaming machining on the multiple agricultural tractor transmission shaft connecting pieces. According to the broaching device for agricultural tractor transmission shaft connecting piece production, broaching machining can be conducted on multiple agricultural tractor transmission shaft connecting pieces at the same time, and the multiple transmission shaft connecting pieces of different sizes can be clamped and fixed in the broaching machining process, so that the machining precision is improved; and meanwhile, the reamer is convenient to disassemble and replace.

The invention discloses a ceramic reamer for machining a bearing hole of a new energy motor shell. The ceramic reamer comprises a handle part and a reamer body arranged at one end of the handle part. The other end of the handle part is used for being connected with a cutter handle and connected with a machine tool spindle through the cutter handle. A plurality of ceramic cutting edges are arranged on the cutter body in the circumferential direction, and a calibration ring and a diameter adjusting device are further arranged on the cutter body. The calibration ring is annular, sleeves the outer part of one end, close to the handle part, of the cutter body, and is in interference fit with the end part of the cutter body; the diameter adjusting device comprises an adjusting mandrel arranged in the middle of the cutter body and a conical ring structure. The invention further discloses a motor shell bearing hole machining method adopting the ceramic reamer. The ceramic cutting edge is matched with the calibration function and the diameter adjusting function, the machining life of the cutter can be prolonged, and the machining precision of the bearing hole is guaranteed.

A reamer includes a shank portion extending from a rear end and a cutting portion extending from the shank portion to a front end. The cutting portion includes a plurality of cutting teeth separated by gashes. Each cutting tooth having a cutting edge extending in a longitudinal direction from the front end to proximate the shank portion. The cutting portion includes a margin trailing each cutting edge and extends along each cutting edge to proximate the shank portion. Each cutting tooth also has a primary relief formed between the cutting edge and the front end and a secondary relief extending longitudinally between the margin of one cutting tooth to the cutting edge of an adjacent cutting tooth. A width, W, of each cutting tooth increases in a radially outward direction with respect to the central, longitudinal axis when viewed from the front end of the reamer.

The invention relates to a machining tool and a combined machining method for a radial eccentric stepped hole of an injector disc, and belongs to the field of eccentric stepped hole machining. The machining tool comprises a detachable guide drill, a detachable reamer, a detachable rose reamer and a detachable reamer. According to the structural characteristics of a cutter and a product, eccentric stepped hole machining is divided into four stage processes of drilling, broaching, chamfering and reaming, and drilling, broaching and chamfering, allowance removal and finishing machining are sequentially completed. And step-by-step machining of the eccentric chamfering stepped hole is achieved. The cutter material, the coating, the cutting edge angle and the cutter split structure are machined step by step, the service life of the cutter is prolonged, and the machining efficiency is improved by more than three times. The combined machining method is adopted, cutter deflection is effectively restrained, chamfering uniformity errors are reduced, aperture control is improved, the roughness of the inner surface of the hole is reduced, the machining efficiency of the injector disc is improved, and the combined machining method is suitable for efficient and precise machining of the spaceflight complex step eccentric hole.

The combined alloy reamer convenient to replace comprises an alloy reamer body arranged at the bottom of a mounting base, five arc-shaped clamping plates are rotationally connected to the periphery of the bottom of the mounting base, the arc-shaped clamping plates are annularly arrayed at the bottom of the mounting base, movable gaskets are detachably installed on the opposite sides of the arc-shaped clamping plates, and the movable gaskets are arranged on the bottom of the mounting base. The surface of the movable gasket is attached to the surface of the alloy reamer, a square inserting rod is arranged at the bottom of the mounting base, a square inserting groove used in cooperation with the square inserting rod is formed in the top of the alloy reamer, and the surface of the mounting base is sleeved with a sleeve. The square inserting groove in the alloy reamer is aligned with the square inserting rod for insertion, then the sleeve slides downwards to drive the arc-shaped clamping plate to rotate, the alloy reamer is clamped and locked through the movable gasket, and the movable gaskets with different thicknesses are replaced according to the actual size of the alloy reamer. And therefore, the alloy reamers with different sizes can be mounted and replaced.

The invention discloses a high-power diesel engine cylinder body tappet hole machining tool and method, a tappet hole and a tappet through hole in the upper portion of the tappet hole are coaxially formed in one side of a cylinder hole, and the machining tool comprises a rough machining tool body and a finish machining tool body; the rough machining cutter comprises a first reaming ladder blade and a second reaming ladder blade, and the second reaming ladder blade is arranged in front of the second reaming ladder blade; the finish machining tool comprises a first reamer ladder blade and a second reamer ladder blade, and the first ladder blade is arranged in front of the second reamer ladder blade. According to the machining tool and method for the tappet hole of the cylinder body of the high-power diesel engine, it can be guaranteed that cutting is stable and does not vibrate in the machining process, the quality of the machined tappet hole and the machined tappet via hole is qualified, the machining efficiency is higher, and the service life of the tool is longer.

The utility model discloses a taper hole drilling and reaming combined drill, and belongs to metal cutting tools. The utility model discloses a drilling and reaming combined drill which is high in cutting efficiency, good in machining precision, smooth in chip removal and long in service life. Comprising a drill rod body and a drill handle, two reaming edges distributed spirally are arranged on the surface of the drill rod body, and two drilling edges are arranged on the front end face of the drill rod body; a plurality of arc-shaped annular protrusions (1-3) are evenly distributed on the surface of the drill rod body (1) at intervals, and the enveloping face of each annular protrusion (1-3) is of an inverted-cone-column-shaped structure. Two semi-corrugated reaming blades (1-1) are formed by the two spiral chip grooves (1-2) which are uniformly distributed on the surface of the drill rod body (1) and an intersection line of the surface of the drill rod body (1); two drilling edges (1-5) are formed by intersecting lines of front end notches of the two chip grooves (1-2) and the front end face of the drill rod body (1), and a drilling front tool face (1-4) of each drilling edge (1-5) is connected with the front end notch of the corresponding chip groove (1-2).

The application discloses a cutter for machining a tapered hole and relates to the technical field of cutters. The cutter for machining a tapered hole is characterized by the following: an inner lining assembly is arranged in the cutter body; when the cutter body starts to perform a hole opening operation on a hole opening plane, the cutter body will vibrate; the rubber sleeve arranged in the cutter body can buffer and absorb the vibration and has a protection effect, thereby preventing resonance; the abutting piece and the connecting column arranged in the cutter body can improve the structural strength of the cutter body and the supporting effect from the inside to the outside, thereby preventing the cutter body from being bent or broken during hole opening; the service life of the cutter body is prolonged; the cutter body is matched with the cutting edge; the cutter can open a tapered hole with a certain precision; the generated metal scraps can be automatically discharged through the slag discharge groove; the cutter can prevent the problem of continuous rotation and biting of the cutter in the tapered hole; and the cutter has an auxiliary effect on improving the hole opening precision.

Tool (5) for machining a workpiece (4), comprising: - a tool shank (12) rotatable about a rotary axis (10), - a cutting device (13) arranged on the tool shank (12) with: - at least one pre-cutting element (14) and - at least one post-cutting element (15),- a first slide unit (8) for displacing the at least one pre-cutting element (14) relative to the tool shank (12) with -- a first output body (25) connected to the at least one pre-cutting element (14) and -- a first drive body (23) interacting with the respective first output body (25) via a first drive surface (24) and - a second slide unit (9) displaceable relative to the first slide unit (8) for displacing the at least one re-cutting element (15) relative to the tool shank (12) with -- a second output body (29) connected to the at least one re-cutting element (15) and -- a second drive body (27) interacting with the respective second output body (29) via a second drive surface (28), wherein the first drive surface (24) and the second drive surface (28) overlap each other in an orthogonal projection onto a transverse plane to the axis of rotation (10), thereby characterizedthat a maximum feed path (s1, s2) of at least two of the output bodies (25, 29) is different.

A cutting tool includes a replaceable cutting head including a forward cutting portion and a rearward mounting portion and a head through hole extending therethrough. The mounting portion includes a male coupling member. The male coupling member includes a conically shaped head abutment surface. The cutting tool includes a female coupling member including a conically shaped forward holder abutment surface and an internal thread. The cutting tool includes a fastening member having an external thread. When the cutting tool is in a locked position, the male coupling member is removably retained in the female coupling member by the fastening member located in the head through hole, the fastening member external thread and the holder internal thread being threadingly engaged with each other. The head abutment surface abuts the forward holder abutment surface thereby forming a Morse taper coupling between the male and female coupling members.

The machine tool comprises a base, a main shaft, a cutter bar locking screw rod, the rigid reamer, a clamp, a tailstock and an air cylinder, a movable center is arranged at the end, close to the clamp, of the tailstock, and the end, away from the rigid reamer, of the cutter bar locking screw rod is connected with a driving mechanism through a transmission piece; the lower end of the clamp is connected with the base in a sliding mode, and a positioning hole is formed in the position, corresponding to a workpiece, of the clamp. According to the machine tool for machining the bimetal lining through the rigid reamer, in the machining process, the rigid reamer is connected with the main shaft through the cutter bar locking screw rod, so that the rigid reamer only rotates on the power source, a workpiece has radial micro-compensation floating in the axial movement process, good follow-up movement is kept, the movement inertia of the workpiece is relieved, and the machining precision of the bimetal lining is improved. And microscopic size change caused by radial movement of the relative rigid reamer is reduced.

The utility model discloses a reaming and grinding integrated cutter, which belongs to the technical field of machining, and specifically comprises a front-end reamer, a rear-end grinding cutter and a cutter handle part which are integrated, the front-end reamer and the rear-end grinding cutter are respectively provided with at least three cutting edges, the front-end reamer is provided with a cutting chamfer, and the rear-end reamer is provided with a cutting groove. And the edge diameter of the cutting edge on the front-end reamer is smaller than that of the rear-end grinding cutter. According to the utility model, the cutter can be reamed and then ground in a hole, and the problems of short service life of a reamer, poor reaming quality and the like caused by poor precision of a pre-hole are solved. The requirement for machine tool precision is lowered, meanwhile, machining efficiency is improved, tool configuration is reduced, and tool cost is lowered; meanwhile, the diamond grinding reamer part improves the hole wall quality, and the machining quality is stable.

A reaming hole machining tool includes a shank that can be mounted on a rotating machine, an axis extending longitudinally along the shank, and a cutting part for performing cutting machining, which includes an end face in the feed direction. From the end face in the feed direction of the tool for reaming holes to the axis of the shank, a cutting part, a leading calibration part, and a calibration part are sequentially arranged. The two axial ends of the leading calibration part are respectively connected to the cutting part and the calibration part. The calibration intersection line formed by the circumferential side wall of the leading calibration part on the radial plane is inclined to the axis, and the included angle is less than 90°. The reaming hole machining tool of the present invention is used to perform reaming machining of holes, especially reaming machining of holes formed in metal materials, reduce or eliminate the feed marks on the hole wall, the hole wall is smooth, the surface roughness reaches below Ra0.5, and it presents a bright and uniform silver-white color.

The invention provides a dual-V-shaped clamping multi-specification adaptive modular cutter with chip removal and cooling functions, and relates to the technical field of hole machining cutters, the dual-V-shaped clamping multi-specification adaptive modular cutter comprises a cutter bar and a cutting head, the cutting head is provided with a connecting hole, and a positioning rod is arranged at the lower end of the cutting head; the top of the cutter bar comprises a V-shaped end, the inner side of the V-shaped end comprises two V-shaped faces, and the V-shaped end penetrates through the connecting hole through a locking bolt to achieve fixation of the cutter bar and the cutting head. A positioning hole is formed in the bottom of the V end, a pre-tightening assembly matched with the positioning hole is arranged at the lower end of the positioning rod, five-face positioning of the cutting head is achieved through matching of the V end on the cutter bar and the supporting face, in the installation process, by installing the pre-tightening assembly in advance, the cutting head can be conveniently installed in the V end, pre-tightening force can be provided, and therefore the cutting head can be installed conveniently. And the cutting head and the V end can be conveniently fixed by the locking bolt.

Reaming tool for reaming very precise bores, especially in gray and ductile iron, comprising a clamping element adapted for clamping in the clamping devices of machine tools, and a cutting element according to the invention, on the circumferential part of which at least two cylindrical longitudinal support surfaces with an angular distance of 60° to 160° are formed, and on the remaining circumference of the cutting element at least three cutting teeth with longitudinal cutting edges and face cutting edges are formed, wherein a cylindrical longitudinal support surface is formed behind the first cutting tooth in the working direction of rotation and the other cylindrical longitudinal support surface is formed in front of the last cutting tooth in the working direction of rotation, characterized in that at the first cutting tooth (4) the distance (L1) of the intersection point (P1), i.e. the longitudinal cutting edge (9) and the inclined cutting edge (10), from the face plane (π) is smallest and at the last cutting tooth (4'') the distance (L1'') of the intersection point (P1'')that is, the longitudinal cutting edge (9'') and the inclined cutting edge (10'') are greatest from the face plane (π), and at least one cutting tooth (4') is formed between the cutting teeth (4) and (4'') with a distance (L1') of the intersection point (P1'), i.e., the longitudinal cutting edge (9') and the inclined cutting edge (10'), from the face plane (π), wherein, for individual cutting teeth (4') and (4), the distances (L1') and (L1) of the intersection points (P1') and (P1) from the face plane (π) decrease from the distance (L1'') in the working direction of rotation, and the distances (L2) and (L2') between the face plane (π) and the intersection points (P2) and (P2'), i.e., the cylindrical longitudinal support surfaces (6) and (6') and the lead-in surfaces (5) and (5'), decrease by at least 0.2 mm as the distance (L1'') between the frontal plane (π) and the intersection point (P1'') are larger.

A method for producing a cutting tool is proposed, wherein the cutting tool has a tool body with a hard coating (2) and the hard coating (2) is applied to the tool body (1) at least in the region of a cutting edge (10, 14, 14a, 43), of a flank (5, 25, 45) and of a rake face (6, 26, 46). First of all, a hard coating (2) is applied to the workpiece on the surface of the tool body (1) of the cutting tool in the region of the cutting edge (3, 23, 43), of the flank (5, 25, 45) adjacent to the cutting edge (3, 23, 43), and of the rake face (6, 26, 46) adjacent to the cutting edge (3, 23, 43). Then, for sharpening the cutting edge, the hard coating on the flank is partially removed by means of laser machining in such a way that, for an angle (δ) between a first geometric plane (16, 36), in which the surface (9) of the tool body (1) situated below the hard coating (2) of the flank (5, 25, 45) extends, and a second geometric plane (18, 38), in which a surface (8, 28) of the hard coating (2) delimited by the sharpened cutting edge (10, 14, 43) extends in the region of the flank (5, 25, 45) after the removal operation, the following holds: 1° ≤ δ ≤ 70.

The invention relates to a drilling method, in particular for a turbine shaft of an aircraft turbine engine, which method is implemented by a drilling machine (100) including a drill rod (8), a cutting tool (4) mounted on a free end of the drill rod, and an anti-vibration ring (10) positioned on the drill rod behind the cutting tool, the anti-vibration ring including a sleeve including a bore extending longitudinally coaxially between a front end and a rear end of the sleeve, as well as a first absorption means positioned in the bore and a second absorption means positioned on an outer circumference of the sleeve, the method including steps of: a) placing the anti-vibration ring on the drill rod near a free end of the drill rod; b) securing the cutting tool to the free end of the drill rod; c) drilling a bore to be made in the turbine shaft by pushing, during which the anti-vibration ring is inserted into an inlet (21) of the bore to be made.

The present invention relates to the technical field of PCD drill reamer, and specifically to a positive and negative chamfering PCD drill reamer with a guide structure, comprising a shank, a chamfering portion and a drill bit; the chamfering portion is installed at the lower end of the shank, and the drill bit is installed at the lower end of the chamfering portion; the chamfering portion drives a sliding block to slide along the inside of a sliding groove through the extrusion of a workpiece, the sliding sliding block drives an extrusion plate to move horizontally, the horizontally moving extrusion plate drives a telescopic rod to stretch horizontally, and the horizontally stretched telescopic rod covers the opening of the limit groove; the horizontally moving sliding block drives liquid in a connecting pipe to enter the surfaces of parts and workpieces.

The drilling and reaming integrated cutter for the engine cylinder block relates to the technical field of engine cylinder block machining and comprises a drill bit and a reinforcing assembly, a cutter containing groove is formed in the side edge of the drill bit, a reamer is arranged in the cutter containing groove, a fixing hole is formed in the side edge of the reamer, an inserting rod is installed at the lower end of the reamer, and the inserting rod is connected with the reinforcing assembly. The reinforcing assembly used for installation and reinforcement is arranged at the lower end of the interior of the cutter containing groove and comprises a reinforcing plate, a limiting hole, a spring and an inner groove, the limiting hole is formed in the middle of the upper end of the reinforcing plate, the spring is installed at the lower end of the reinforcing plate, and the inner groove is formed in the outer portion of the spring. According to the drilling and reaming integrated cutter for the engine cylinder body, the cutter containing groove is used for positioning and rapid installation of the reamer, after the cutting edge of the detachable and replaceable reamer is abraded, the cutter can be continuously used by replacing the blade, the grinding and replacing cost of the cutter is reduced, the service life of the cutter is prolonged, and the machining efficiency of the cutter is improved.

The utility model relates to the technical field of high-precision reamers, and discloses a fine-adjustable reamer which comprises a reamer handle, an adjusting fixing block is fixedly connected to the top of the reamer handle, and a T-shaped sliding groove is formed in the top of the adjusting fixing block. The limiting ring is rotated through the operation groove, so that the limiting ring rotates along the limiting groove, the limiting ring drives the hexagonal adjusting block, the hexagonal adjusting block rotates the threaded rod through the hexagonal avoiding groove, and the threaded rod rotates and descends towards the interior of the reamer handle along the adjusting fixing block; the inner wall of the threaded rod slides downwards along the outer wall of the adjusting block through the hexagonal receding groove, meanwhile, the threaded rod pulls down the adjusting block, so that the adjusting block extrudes the reamer outwards through the inclined face, the reamer drives the T-shaped sliding block to expand outwards along the T-shaped sliding groove, the size of the reamer after abrasion is made up, and the flexibility of the reamer is improved. And the scrapping probability of the reamer is reduced, so that higher machining precision and flexibility are ensured.

The utility model belongs to the technical field of machining, and particularly relates to a floating self-centering reamer which comprises a reamer sleeve, a ball screw and a reamer body, the reamer sleeve is provided with evenly-distributed threaded holes in the radial direction of the reamer sleeve and provided with a square hole in the axial direction, one end of the reamer body is provided with a square boss in the axial direction, and the square boss of the reamer body is placed in the square hole of the reamer sleeve. According to the floating self-centering reamer, the problem that the axis of the reamer does not coincide with the rotation axis of the main shaft in the reaming process can be effectively solved, the reaming quality is improved, the designability of the floating self-centering reamer is good, the structure is simple and reliable, and the floating self-centering reamer is suitable for popularization and application. And the reaming quality of the precision hole can be simply and efficiently improved.

A multi-part modular tool rotatable about a longitudinal tool axis (A), comprising: a machining head; a first holding element comprising a body elongated along the longitudinal axis (A) of the tool, in which a passage extends along the longitudinal axis (A) of the tool; a second holding element which can extend in the passage of the first holding element; wherein the machining head can be connected to the second holding element in such a way that the machining head is fixed firmly to the first holding element at least in the axial direction (A) and / or in the radial direction (R), and wherein the passage of the first holding element and the second holding element are adapted to one another such that during a connection process in which the machining head is connected to the second holding element, the second holding element is movable relative to the first holding element.