47results about "Boring heads" patented technology

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.

The invention discloses a forward precise fine-tuning boring cutter, which relates to the technical field of machine tool cutters and comprises a mounting frame, a cutter handle mounted on the mounting frame, a blind rivet fixed on the cutter handle, a conical circular truncated cone fixed at one end of the cutter handle far away from the blind rivet, a cutter bridge mounted on the circular truncated cone, and two cutter holders mounted on the cutter bridge. A forward boring tool bit and a reverse boring tool bit are installed on the two tool aprons respectively and symmetrically distributed in the axial direction of the tool handle in a back-to-back mode, the axial distance between the forward boring tool bit and the reverse boring tool bit is larger than the axial size of a boss, needing to avoid space, of a machined workpiece, heightening blocks are installed between the forward boring tool bit and the tool aprons, and the forward boring tool bit is higher than the reverse boring tool bit. The fine adjustment mechanism and the locking mechanism are arranged on the tool apron, a worker does not need to stop the machine to change the rotating direction of the main shaft, boring machining of holes in the forward direction and the reverse direction is achieved, the machine stop machining auxiliary time is shortened, the stability of concentricity of all the holes is improved, and the machining efficiency of workpieces is improved.

The application discloses a taper hole boring tool with adjustable taper and a stepped hole processing method, and belongs to the technical field of machining. The taper hole boring tool and the stepped hole processing method adjust the taper hole boring taper adjusting knob, drive the lead screw to rotate, and make the radial sliding block move along the horizontal direction of the slide support. The radial sliding block drives the upper end of the boring bar angle rail to move, the boring bar angle rail drives the axial sliding block to move along the vertical direction of the slide support, and the boring bar angle rail is kept consistent with the angle of the taper hole. The angle of the boring bar angle rail is adjusted according to the taper hole angle requirement on the drawing, the relative position of the boring bar angle rail and the boring bar support is changed through the transmission rod, the horizontal direction displacement of the boring bar support is transmitted to the large-diameter boring bar or the small-diameter boring bar, and thus the boring machining of taper holes with different angles is realized, the universality of the device is improved, and the customization cost of the forming tool is reduced.

The invention relates to a multifunction spindle for a machine tool for machining workpieces, comprising a spindle housing, a rotational drive and a tool-holding unit, wherein the tool-holding unit is disposed within the spindle housing and can pivot relative to the spindle housing about an axis perpendicular to the axis of rotation. The problem addressed by the invention is that of providing a corresponding multifunction spindle which, in particular during the turning of polygonal profiles, allows fast and largely complete compensation of imbalances which occur and an increase in the accuracy of the positioning of the axis lying perpendicular to the drive shaft, while at the same time functional reliability is established. The problem is solved in that at least two mutually independent and directly adjacent measurement systems for sensing identical position angles are connected to the tool-holding unit, by means of which measurement systems the measured position angle signals can be transmitted, using a transmission unit, on at least two mutually independent transmission paths to a controller of the machine tool equipped with the multifunction spindle, at least one transmission path being used for position control and at least one transmission path being used to establish the functional reliability of the pivot axis lying perpendicular to the drive shaft, the transmission unit contactlessly supplying power to at least two connected measurement systems, the transmission unit consisting of at least two parts which rotate relative to each other at the spindle rotational speed, and the transmission unit having a central bore through which media channels are centrally led.

The invention relates to a reamer and to a reamer and floating head assembly. The task of the invention is to provide a reamer that will provide for high machining accuracy, will be adjustable for machining workpieces having different diameters and will allow for quick restoration or replacement of blades and guides. A reamer (1; 101) comprises a head (2; 102), at least three guides (3; 103), each consisting of a guide part (3 a; 103 a), movably arranged in the head, and a pointed part (3b; 103b), the guides being arranged at an angle φ with respect to the central axis of the head, and wherein part of the surface of the pointed part of the respective guide, which is intended to come in contact with the workpiece, is arranged at the same angle φ with respect to the central axis of the respective guide so that part of the surface of the pointed part of the respective guide, which is intended to come in contact with the workpiece, is arranged parallel to the central axis of the head, a blade holder (4; 104), an adjusting screw (5; 105) of the guides, elements (3c, 5a, 5b, 11, 12; 103c, 111) for transferring the translational movement of the adjusting screw (5; 105) of the guides to the guides and the blade holder, and a blade (6; 106) for machining the workpiece.

The invention discloses a fine boring cutter for an inner cavity of a motor shell. The fine boring cutter comprises a cutter body and a mounting cavity, the connecting column is arranged on one side of the cutter body, the cutter handle is arranged on one side of the connecting column, and the cutter body, the connecting column and the cutter handle are matched, so that assembly of the cutter body and the cutter handle is completely presented; the two sets of mounting cavities are formed in the cutter body, and the two sets of boring cutter clamps and the blades are correspondingly assembled, so that the function of machining two sections of holes with different inner diameters at a time is achieved, multiple times of clamping and cutter replacement are not needed, and the machining efficiency is improved; the cutter handle, the cutter body and the boring cutter clamp are all reusable components, so that only the blade needs to be replaced when the blade is abraded, the whole cutter does not need to be replaced, and the overall replacement cost of the cutter is greatly reduced; the outer diameter can be adjusted by finely adjusting the boring cutter clamp, so that the cutter can meet the machining requirements of inner cavities of motor shells with different hole diameters, new cutters do not need to be specially designed and manufactured for different hole diameters, the types and the number of the cutters are reduced, and the purchasing and inventory cost of the cutters is reduced.

Turning cutting tool (10), comprising: a tool body (11) comprising a flute section (18) having a plurality of helical flutes (22) separated from each other by teeth (23); and an adjustable vibration absorber arrangement (60) arranged within a cavity (25) formed in the clamping groove section (18), the adjustable vibration absorber arrangement (60) comprising at least two adjustable absorber masses (62), an elastic material (64) between the at least two absorber masses (62) and the cavity (25), and one or more connecting elements (66) arranged between the at least two absorber masses (62) to prevent a relative angular displacement between the at least two adjustable absorber masses (62) about a central longitudinal axis (12) of the rotary cutting tool (10), wherein the one or more connecting elements (66) are not in contact with the tool body (11) to allow the at least two adjustable absorber masses (62) to be held only by the elastic material (64), which enablesthat the adjustable vibration absorber arrangement (60) is set to a desired frequency in order to suppress torsional vibrations of the rotary cutting tool (10) during a cutting operation.

The utility model relates to the technical field of machining numerical control tools, in particular to a radial adjusting structure of a heavy boring head, which comprises a main body and blade seats, two seat bodies are arranged at the top of the main body, each seat body is provided with a blade seat, each blade seat is provided with a threaded hole, each blade seat is provided with a fixing hole, and a connecting block is fixed at the bottom of each blade seat. Two adjusting grooves are formed in the main body, two adjusting holes are formed in the side wall of the main body, and the adjusting holes are communicated with the adjacent adjusting grooves; when the blade seat is fixed on the seat body, the connecting block extends into the adjusting groove, an adjusting bolt is further arranged in the adjusting groove, the adjusting bolt is connected with the connecting block through threads in a matched mode, the head of the adjusting bolt is aligned with the adjusting hole, and a fastening bolt penetrates through the fixing hole and is locked into the threaded hole. The utility model has the advantages that the structure is simple, the adjustment is convenient, the condition that the cutter body is separated from the cutter body due to inevitable tiny vibration in the machining process is avoided, and the machining size is very stable.

The utility model discloses a large-aperture adjustable flat-bottom counter bore machining U drill, relates to the technical field of mechanical drilling, and solves the problems of low machining speed and high machining cost when a traditional radial drilling machine is used for boring and machining a large-aperture counter bore. Comprising a drill bit body and a cutter handle, a centering bearing is arranged at the end of the drill bit body, and a pressing plate is arranged at the head of the centering bearing to fix the centering bearing at the end; blade seats are symmetrically arranged on the drill bit body, a plurality of blade grooves are formed in the ends, close to the centering bearing, of the blade seats, a blade is arranged in each blade groove, and each edge of each blade can be used in a direction-rotatable mode. The blade seats are divided into two types, one type is a triangular blade seat, and the blades arranged in the blade grooves of the blade seats are triangular; the other blade seat is a square blade seat, and the blade arranged in the blade groove is square; the centering bearing is detachably connected with the drill bit body, the blade seat is detachably connected with the drill bit body and replaced, the blade and the blade seat are detachable, and the blade seat can adjust the counter bore machining diameter size of the U drill.

The cutting tool has a main body and a cutting edge layer. The main body is rod-shaped. The cutting edge layer is provided at a front end of the main body. The cutting edge layer forms a cutting edge. The main body is formed of a cemented carbide containing tungsten carbide and cobalt. The cutting edge layer is formed of polycrystalline diamond. In the cemented carbide, the weight of the tungsten carbide divided by the weight of the entire cemented carbide is a percentage of 90.0% or more and 95.0% or less. In the cemented carbide, the weight of the cobalt divided by the weight of the entire cemented carbide is a percentage of 4.0% or more and 9.0% or less.

The present invention discloses a boring tool apparatus that comprises a head, stem and tool connector. The tool connector may be connected to the stem on one end and to a hand held power tool on the other end. Alternatively, the apparatus may comprise a stem tail to attach the tool connector to a hand held power tool. The tool connector may be placed in the stem tail such that the stem end of the tool connector is held securely in the stem tail by means of a cap and the power tool end of the tool connector is exposed outside the stem tail to connect to a hand held power tool. The apparatus may also comprise attachment for wire, sleeve, pipe, or cable to ride with it as a bore is created. Also disclosed herein is the method of boring a hole using the apparatus of the present invention.

The utility model discloses a machine clamping boring cutter convenient for tool bit flattening, which comprises a mounting component, an adjusting component and a boring cutter component, the adjusting component is arranged on the mounting component and used for adjusting the cutting horizontal plane of the machine clamping boring cutter, and the boring cutter component is arranged on the adjusting component and used for assembling and butting the machine clamping boring cutter. The adjusting assembly comprises an overturning assembly and a checking assembly, the overturning assembly is arranged in the mounting assembly, the checking assembly is arranged on the overturning assembly, the overturning assembly comprises a connecting column, a butt joint rod, a fixing plate, a balancing weight, a round hole, a bolt and a threaded hole, the connecting column is arranged on the mounting assembly, and the butt joint rod is arranged on the fixing plate. The butt joint rod is rotationally installed on the connecting column, and the fixing plate is fixedly installed on the outer wall of the butt joint rod. The mechanically-clamped boring cutter facilitating tool bit flattening has the advantages that the cutting horizontal plane of the mechanically-clamped boring cutter can be adjusted in a self-adaptive mode, and the situation that the cutting angle is lower than the horizontal plane, and consequently the mechanically-clamped boring cutter is broken in the machining production process is avoided.

The utility model discloses a reducing boring cutter structure which comprises a connector and an adjusting mechanism. A cutter handle is fixed to one end of the connector, a pair of linear sliding grooves are formed in the cutter handle, sliding blocks are arranged in the linear sliding grooves in a sliding mode, cutter holders are fixed to the two opposite ends of the sliding blocks, and blades are installed on the cutter holders; the adjusting mechanism is installed in the cutter handle and comprises a main shaft, the main shaft is arranged in the cutter handle and rotationally provided with a rotating ring, a gear is fixed to the rotating ring, racks are arranged on the sides, close to the gear, of the pair of sliding blocks, the gear is meshed with the pair of racks, and a fixing ring is fixed to the position, below the rotating ring, of the main shaft. A threaded head is fixed to the lower portion of the fixing ring, a threaded hole matched with the threaded head is formed in the cutter handle, and a pressing piece is rotationally arranged at the end, arranged outside the cutter handle, of the main shaft and pressed on the pair of sliding blocks. Through the related structural design, the radial extension length of the double-edge boring cutter lug can be synchronously adjusted, so that the machining precision is effectively improved.

A rotary cutting tool includes a support structure having a central hub located at an axially rearward end of the rotary cutting tool. A plurality of primary support members extends from the central hub in different axial and radial directions in three-dimensional space with respect to a central, rotational axis of the rotary cutting tool. The support structure may include one or more secondary support members extending from a primary support member in different axial and radial directions in three-dimensional space, and one or more tertiary support members to increase stiffness of the support structure. The central hub extends in a plane that is substantially perpendicular to the central, rotational axis of the rotary cutting tool. In one embodiment, each of the plurality of primary support members have a different physical dimension.

A tool cartridge (1) for a cutting tool (100) is provided with a first end (3a) and a second end (3b), a longitudinal axis (X) extending there between, a first side (11), and a second side (12) opposite to the first side (11), comprising: A top surface (5) extending from the first end (3a) towards the second end (3b), a bottom surface (7) opposite to the top surface (5), a first side surface (13) extending along the first side (11) and a second side surface (15) extending along the second side (12), an end surface (17) located at the first end (3a) and extending between the first and the second side surface (13, 15), an insert pocket (19) configured for accommodation of a cutting insert (140), wherein the insert pocket (19) is recessed in the top surface (5) and opens into the second side surface (15) and the end surface (17), a groove structure (40) recessed from the top surface (5) to the bottom surface (7) and having a first, a second, a third groove portion and a connection portion, the first to third groove portions being continuously connected by the connection portion of the groove structure (40), wherein an elastically deformable first land portion is formed between the end surface (17) and a first groove portion, an elastically deformable second land portion is formed between the second side surface (15) and a second groove portion, and an elastically deformable third land portion is formed between the first side surface (13) and a third groove portion, a first adjustment means configured for pivoting the insert pocket (19) with the third land portion as hinge point by elastically biasing the insert pocket (19) towards the second side (12), and a second adjustment means configured for pivoting the insert pocket (19) with the first land portion as hinge point by elastically biasing the insert pocket (19) towards the second side (12).

The invention relates to the technical field of boring equipment, in particular to a boring device which comprises a machine tool, a boring rod is fixedly connected to the output end of the machine tool, and an alignment structure is arranged at the end, away from the machine tool, of the boring rod. The alignment structure is used for fixing the end, away from a machine tool, of the boring rod into a hole groove to be bored and enabling the axis of the boring rod to coincide with the axis of the hole groove, and a boring cutter moving in the radial direction of the boring rod is fixedly arranged on the outer wall of the boring rod. The alignment structure is arranged at the end, away from the machine tool, of the boring rod, the end of the boring rod can be fixed into the to-be-bored hole groove, the axes of the boring rod and the hole groove coincide, the problem that in a traditional device, radial run-out of the boring rod is generated due to cantilever stress is effectively solved, and deviation of the axis of the boring rod and the axis of the hole groove is avoided; the probability that the hole groove size precision is out of tolerance and the surface roughness is unqualified is greatly reduced, the machining quality of core parts is ensured, and the high-precision manufacturing requirement is met.

The application discloses a boring head cutter with fine adjustment function, relates to the technical field of boring cutters, and aims to solve the technical problem that the operation of the traditional boring head cutter is prone to centrifugal force imbalance after adjustment, comprising a cutter shaft coupling, a main balance shell, a balance adjustment module, a cutting tool and a balance mechanism arranged below the cutter shaft coupling. Through the annular shell of the gathering module, the counterweight block and the sliding path structure, and in combination with the driving group of the transmission module, adaptive synchronous adjustment of the counterweight distribution is realized in the cutter fine adjustment process, the counterweight block can be linked and gathered or unfolded along with the displacement of the cutting tool, so that the combined mass of the cutter and the counterweight is always distributed symmetrically around the rotation axis, the centrifugal force imbalance and vibration caused by the change of the cutter position are effectively inhibited, the stability and machining precision of high-speed boring are improved, and the technical problem that the traditional boring head cutter is prone to rotation imbalance and affects the machining quality due to mass eccentricity after fine adjustment is solved.

The invention relates to a cutting insert (1) for interchangeable clamping in a tool (3), wherein the cutting insert (1) has a first surface (5) and a second surface (7) opposite the first surface (5) along a thickness direction, wherein a first clamping geometry (9) for clamping the cutting insert (1) in the tool (3) is arranged at least on the first surface (5), wherein the first clamping geometry (9) has at least one clamping surface (11) which extends along a longitudinal direction (L) of the clamping surface, and wherein two clamping points (S1, S2), which are arranged spaced apart from one another on a projection line (P) of an imaginary straight line oriented parallel to the longitudinal direction (L) of the clamping surface onto the clamping surface (11), have different distances from an imaginary reference plane (13), to which the thickness direction is perpendicular.

The invention discloses a tool rest tool and method for boring an impeller shaft, and the tool rest tool comprises a base connecting module which is fixedly connected to a hoop sleeving a boring rod; the tool rest execution module is installed on the base connecting module through an adjustable connecting mechanism and used for adjusting the radial position of the tool rest execution module relative to the base connecting module so as to control the boring diameter; the base connecting module comprises a bottom plate and a tool rest base. The bottom plate is in the shape of a hollow semi-cylinder, and the inner surface of the semi-cylinder is fixedly connected to a hoop of the boring rod; the bottom surface of the tool rest seat is connected to the outer surface of the semicircular cylinder of the bottom plate; the tool rest execution module comprises a tool fixing seat and a boring tool; the tool fixing base is arranged on the side face of the tool rest base. The cutter fixing base is provided with an extending part, a cutter containing groove is formed in the extending part, and the cutter containing groove is used for clamping a boring cutter. The tool rest tool is compact in structure, high in adjustability and capable of solving the boring problem in a narrow space between the boring rod and the machining hole.

The application provides a gear boring device for gear box production and processing, and relates to the technical field of gear box boring. The device comprises a boring head structure applied to the device, which comprises a boring arm and a driving shaft. An adapter seat is arranged at one end of the boring arm close to the driving shaft. A limiting trapezoidal block is integrally formed on the surface of the adapter seat. A supporting seat is integrally formed at one end of the driving shaft close to the boring arm. A boring cutter head is arranged in the boring arm away from the driving shaft. A bipolar control structure is arranged between the driving shaft and the boring arm. The technical key points are as follows: after the boring cutter head is controlled to extend to the limit position from the inside of the boring arm by the bipolar control structure, the adapter seat is continuously controlled to move in the direction of movement relative to the supporting seat towards the boring cutter head, the coaxial state of the boring arm and the driving shaft is changed into the state of different shafts, the length of the boring cutter head for boring in the gear box is increased, the boring space is expanded, and the application range is wide.

A vibration-proof structure for a rotating body (2) includes: a cylindrical rotating body (2) having a rotation axis (X) and including: an opening (7a) in an end along the rotation axis (X); and a hollow (7) continuous with the opening (7a) and extending along the rotation axis (X); a weight (12) in the hollow (7); a plurality of elastic members (24, 25) holding the weight (12); and a head member (4) connected to the rotating body (2) in such a manner as to close the opening (7a) and have an axis that coincides with the rotation axis (X), the opening (7a) and the hollow (7) each having a cross section in the shape of a circle with the rotation axis (X) as the center, the weight (12) having a columnar shape and an axis that coincides with the rotation axis (X), the head member (4) including a portion opposite to the rotating body (2) to which portion a cutting tool (5) is attachable, the weight (12) including a protrusion (13) protruding toward the head member (4) from the boundary (B) between the respective outer surface portions (21a, 41a) of the rotating body (2) and the head member (4).

The invention relates to the technical field of semiconductor part machining tools, in particular to a turning eccentric boring tool for machining a deep hole of a semiconductor part, which is characterized in that a tool bar main body adopts an eccentric structure design, so that the tool bar main body can realize a specific motion trail and mechanical properties in a rotating or working process, the cutting efficiency is optimized, and the vibration is reduced; the diameter of the eccentric part of the cutter bar main body is small, so that the interference phenomenon between the cutter bar main body and the inner hole wall of a product can be effectively avoided during turning operation of a small hole in the bottom of a deep hole, the machining adaptability is improved, and the machining efficiency is improved. Precise boring of deep holes with different axes on semiconductor parts (such as a cavity and a flange) can be completed at a time in the same working procedure only through a single tool, multiple purposes of one tool are achieved, the machining precision, efficiency and stability are remarkably improved, the tool changing and debugging time is shortened, and the human cost is reduced.

A workpiece is cut by cutting under a wide range of machining conditions. A first standing surface is adjacent to the cutting portion with a first surface therebetween, is inclined upward in a direction along the center axis as it moves away from the first surface, and moves away from the center axis as it moves closer to the rear end of the main body. A second standing surface extends from a second surface toward the rear end of the main body, and is inclined upward in a direction along the center axis as it moves away from the second surface. The rear end of the first standing surface is closer to the rear end of the main body in the direction along the center axis than the front end of the second standing surface.

The invention relates to a contour rotary head with a facing slide for use in a machine tool having at least one working spindle. The object of the invention is to propose a technical solution for an eccentrically actuated facing rotary slide that can be integrated into the tool spindle and has an adjustment device that enables constant rake and clearance angles over the entire adjustment range.This problem is solved by the adjusting device having a housing (8) arranged centrally to the spindle axis of rotation (1) and in the housing (8) two adjusting eccentrics (9, 11) arranged so as to be rotatable into one another and to each other, wherein the outer adjusting eccentric (9) is arranged centrally to the spindle axis of rotation (1), and wherein the inner adjusting eccentric (11) is mounted in the outer adjusting eccentric (9) with an eccentricity E1, wherein the tool clamping housing (14) is mounted in the inner adjusting eccentric (11) with an eccentricity E2, wherein the tool clamping insert (4) is mounted in the tool clamping housing (14) with an eccentricity E3, and wherein the tool clamping insert (4) has at least one guide rail (17) for the translational guidance of the tool clamping housing (14).

The application discloses a boring tool, which comprises a main body, a rough-fine integrated adjusting mechanism, a tool seat and a tool blade; a radial mounting hole is arranged at the head of the main body, the rough-fine integrated adjusting mechanism is arranged in the mounting hole, the end of the rough-fine integrated adjusting mechanism is connected with the tool seat, the tool blade is connected with the tool seat, and the end of the main body is used for connecting a special numerical control tool handle for the boring tool. The rough-fine integrated adjusting mechanism is used for quickly moving the tool blade when quick adjustment of the diameter change is needed and slowly moving the tool blade when accurate adjustment of the diameter change is needed. The boring tool can realize quick rough adjustment and slow accurate adjustment simultaneously.

A cutting tool includes a main body and a cutting edge. The main body has a rod shape. The cutting edge layer is disposed at a front end of the main body. The cutting edge layer forms a cutting edge. The main body is formed of a cemented carbide containing tungsten carbide and cobalt. The cutting edge layer is formed of polycrystalline diamond. In the cemented carbide, a percentage of a value obtained by dividing a weight of the tungsten carbide by a weight of an entirety of the cemented carbide is 90.0% to 95.0%. In the cemented carbide, a percentage of a value obtained by dividing a weight of the cobalt by the weight of the entirety of the cemented carbide is 4.0% to 9.0%.

Modular drill head (2), comprising: a tubular main body (12) having an internal thread (32) with a first inclination and a pair of axially extending, projecting elements (42, 44); a movable rod (16) which engages with the tubular main body (12) such that the movable rod (16) moves in an axial direction D with respect to the tubular main body (12), wherein the movable rod (16) has an internal thread (34) with a second inclination which differs from the first inclination; and a leadscrew (14) arranged within the tubular main body (12), which has a first external thread (36), a second external thread (38) and a plurality of teeth, wherein the first external thread (36) engages cooperatively with the internal thread (32) of the tubular main body (12) and the second external thread (38) engages cooperatively with the internal thread (34) of the movable rod (16), wherein the rotation of the leadscrew (14) causes the pair of axially extending, cantilevered elements (42, 44) of the tubular main body (12) to engage cooperatively with the plurality of toothings of the leadscrew (14) in a manner that produces an audible and tactile click, each click indicating a distance by which the movable rod (16) is displaced relative to the tubular main body (12), furthermore, a rotation lock is provided which prevents rotation of the movable rod (16). wherein the anti-rotation device comprises at least one cylindrical pin (18) which is arranged in the movable rod (16) by an interference fit and is located in an elongated slot formed in the tubular main body (12), characterized in that the at least one cylindrical pin (18) contacts a spring contained in a housing in the tubular main body (12), which provides a preload force in the axial direction to eliminate the play between the internal thread (32) of the tubular main body (12) and the internal thread (34) of the movable rod (16) and the first and second external threads (38) of the leadscrew (14).

The utility model relates to mechanical processing numerical control cutter technical field, especially a positioning locking structure of rough boring head, including main part and blade seat, the top of main part is provided with two seat bodies, and two seat bodies are about the axis of symmetry of main part, the top of each seat body is installed with blade seat, and the blade is installed on each blade seat, and the side of seat body faces another seat body is provided with vertical locating surface, and the top surface of seat body is provided with inclined locating surface, and the bottom of blade seat is provided with vertical cooperation surface and inclined cooperation surface, when assembling, vertical cooperation surface abuts on vertical locating surface, and inclined cooperation surface abuts on inclined locating surface. The utility model's advantage lies in: through vertical locating surface and vertical cooperation surface, inclined locating surface and inclined cooperation surface mutual cooperation, when locking, locking force has component force in horizontal and vertical direction, along with locking force increasing, the connection between seat body and blade seat is more reliable, and integral rigidity also obtains very big promotion.

The invention discloses a combined adjustable fine boring cutter for a new energy automobile aluminum alloy motor shell, and relates to the field of boring cutters, the combined adjustable fine boring cutter comprises a motor hole aluminum alloy boring cutter body, the motor hole aluminum alloy boring cutter body is of a square structure, a motor hole multi-step fine boring unit and a balance calibration block unit are arranged on the two sides of the motor hole aluminum alloy boring cutter body respectively, and the combined adjustable fine boring cutter further comprises a flange cutter handle; the flange cutter handle is connected to the upper portion of the motor hole aluminum alloy boring cutter body through a motor hole fine boring cutter body flange connecting assembly, and the motor bearing hole guide bar fine boring cutter head is connected to the lower portion of the motor hole aluminum alloy boring cutter body through a motor bearing hole fine boring cutter head flange connecting assembly. Through the combined design of the motor bearing hole fine boring guide bar tool bit and the motor hole multi-step composite fine boring tool, machining of a multi-step motor hole and a bearing hole is completed through one-time fine boring on one tool, the concentricity of the motor hole and the bearing hole is ensured, and meanwhile the machining efficiency is improved.