435results about "Twist drills" patented technology

A holesaw assembly can include a holesaw, a pilot drill, an arbor, and a retainer. The holesaw can include a base and a cylindrical wall coupled to the base. The cylindrical wall terminates away from the base in a cutting edge and defines an internal space. The drill bit can include a cutting tip and an elongate shaft portion. The arbor can include a first portion configured to be couplable with a tool holder of a power tool and a second portion configured to be coupleable with the holesaw. The arbor can be configured to receive the drill bit and facilitate movement of the drill bit between an extended position and a retracted position relative to the arbor while the drill bit remains coupled to the arbor. The cutting tip is closer to the first portion of the arbor in the retracted position than in the extended position. The retainer can be configured to selectively maintain the drill bit in the retracted position. Release of the retainer can allow movement of the drill bit from the retracted position toward the extended position.

The utility model provides a twist drill coping device with high efficiency and accurate positioning, and belongs to the field of alloy cutter coping machining. The problems that certain dangerousness exists in existing auger bit coping, the coping yield is uncontrollable, and the coping efficiency is difficult to improve are solved. The drilling machine comprises a platform, a grinding wheel mechanism, a walking mechanism and a drill bit clamping mechanism, the grinding wheel mechanism, the walking mechanism and the drill bit clamping mechanism are all arranged on the platform, the grinding wheel mechanism is arranged at one end of the walking mechanism, the drill bit clamping mechanism is arranged on the walking mechanism, and the walking mechanism comprises a lead screw, a linear guide rail, a sliding table and a circular truncated cone face. The grinding wheel mechanism comprises a grinding wheel mounting frame, a servo motor and a grinding wheel, and the drill bit clamping mechanism comprises a drill bit clamping tool and a clamping tool mounting seat. The auger bit grinding device is mainly used for grinding an auger bit.

The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

The present invention relates to a replaceable drill bit with symmetrical bevel positioning, comprising a drill rod and a replaceable drill tip, wherein a first positioning bevel of the drill tip and a second positioning bevel of the drill tip are arranged at the lower end of the replaceable drill tip, and are centrally symmetrical along a common axis CL, the first positioning bevel of the replaceable drill tip and the second positioning bevel of the drill tip match with two corresponding positioning bevels of a drill rod mounting structure, a first limiting surface and a second limiting surface are arranged below the first mounting surface and the second mounting surface of the replaceable drill tip, and the drill bit presents a dovetail structure which is narrow at the top and wide at the bottom, and a first fastening through hole and a second fastening through hole are arranged in the middle of a first chip removal groove of the drill tip and a second chip removal groove of the drill tip; a mounting structure for mounting the replaceable drill tip is arranged at the upper end of the drill rod, and is a semi-enclosed groove centrally symmetrical with the common axis CL, the groove has a first positioning bevel of the drill rod and a second positioning bevel of the drill rod as positioning surfaces, which match with the first positioning bevel of the drill tip and the second positioning bevel of the drill tip of the replaceable drill tip, and the replaceable drill tip is coaxial with the drill rod; a fastening screw fixes the replaceable drill tip on the drill rod.

To provide a drill which can enhance abrasion resistance, thereby can extend the life of a tool.SOLUTION: A thinning edge, a main cutting edge and a leading edge have a honing H having a projecting curve-shaped cross section vertical to each ridge line part, in the cross section, among both ends h1 and h2 of the honing H, a surface connected to a first end h1 is defined as a first surface 101, a surface connected to a second end h2 is defined as a second surface 102, a distance between the first end h1 and an intersection P between the extended line of the first surface 101 and the extended line of the second surface 102 is defined as a first width dimension L1, a distance between the second end h2 and the intersection P is defined as a second width dimension L2, [L1 / L2] is defined as a width ratio, as for the thinning edge and the main cutting edge, the first surface 101 is defined as a rake surface, the second surface 102 is defined as a rake surface, and the width ratio of the thinning edge is larger than the width ratio of the radial outer end connected to an outer peripheral corner in the main cutting edge.SELECTED DRAWING: Figure 5

The invention discloses a high-speed numerical control gantry vertical and horizontal drilling and milling composite machine tool, which relates to the technical field of machine tools, and comprises a horizontal machine tool, a vertical machine tool arranged in the middle of the horizontal machine tool, a connecting end arranged at the output end of the vertical machine tool, and a twist drill movably clamped at the bottom of the connecting end, the twist drill further comprises a first oil cavity arranged outside the twist drill in a sleeving mode. By means of the drilling and milling combined machine tool, the problem that when an existing high-speed numerical control gantry vertical and horizontal drilling and milling combined machine tool drills a tubular workpiece or a workpiece with a cavity, most chippings can enter the cavity in the workpiece due to the structural characteristics of a spiral groove after a drill bit drills through is solved. The chippings are distributed dispersedly, easily clamped in complex and narrow corner gaps of a cavity and difficult to clean, special tools such as a long and thin brush and a high-pressure air gun are needed, a large amount of manpower and time are consumed, and the production efficiency is reduced. And in addition, scraps accumulated in the cavity may scratch and abrade the inner surface of the workpiece, the machining quality and precision are affected, and the performance of the workpiece is damaged due to oxidation and corrosion if the scraps are left for a long time.

The invention relates to a drill bit comprising at least two end-face main cutting edges (11a, 11b), first chip surfaces (12a, 12b) adjacent to the at least two end-face main cutting edges and sloping in a first direction, first clearance surfaces (13a, 13b) adjacent to the at least two end-face main cutting edges and sloping in a second direction, a first end-face pointing by which central cutting edges (14a, 14b) adjacent to the at least two end-face main cutting edges are formed, to which second chip surfaces (15a, 15b) sloping in a third direction are adjacent, and at least one transverse cutting edge (16) extending between the at least two central cutting edges (14a, 14b). The at least two end-face main cutting edges (11a, 11b) are formed by the corresponding intersection line of the first rake faces (12a, 12b) with the first clearance faces (13a, 13b, 23a, 23b, 33a, 33b).Furthermore, the at least two main cutting edges (11a, 11b) on the end face are followed by at least two central cutting edges (14a, 14b, 24a). In addition, the drill (10) has a second end face point, which forms at least two central cutting edges (14a, 14b) in each case, to which third rake faces (17a, 17b) sloping in a fourth direction adjoin.

A method and a device for machining an elongated workpiece having a shaft extending in the direction of the workpiece longitudinal axis forms at least one groove with a defined groove surface on the workpiece by material removal by a laser beam directed with its beam axis onto the workpiece surface and guided along a laser path extending exclusively parallel to a groove profile curve corresponding to the intersection between the groove surface to be produced and a geometric plane that forms an angle β with the workpiece longitudinal axis, where 90°≥β≥the angle of groove inclination. The distance between the curve and the path is predetermined such that the workpiece material located in the geometric plane on the path side facing away from the curve completely sublimates or vaporizes due to the laser beam power density when the beam is guided along the path.

A cutting insert (10) of a rotary drill tool (1) for cutting metal comprises a head (14) and a neck extending along a longitudinal axis (12). The head has an axially forward-facing cutting region (13). At least the neck is configured for enabling releasably mounting at a support body (11). The head is formed by at least two lobes (33) each having a radially outermost envelope surface (23). Each lobe comprises a radially and axially extending torque transfer surface (17) configured for abutment contact with a corresponding torque transfer surface(29) of the support body. In a plane extending perpendicular to the longitudinal axis, the torque transfer surface has an orientation relative to the radial direction (RT) at an angle (α) in the range 15 to 45°, or 22 to 35°, or 28 to 33°, or 28 to 29°. A corresponding support body and a rotary drill tool.

A method for producing a drill tool cutting section for cutting a workpiece of metal and / or composite includes the steps of: providing a blank; applying a first coating layer of a first coating material to the blank, including the front face and the envelope surface; removing material, including the first coating layer, from the blank; forming a drill point in the front face; forming a margin in the envelope surface by retaining at least a portion of the envelope surface together with the thereto applied first coating layer; and applying a second coating layer of a second coating material to the blank, including the drill point and the margin. A drill tool cutting section produced by the method is also provided.

A rotary cutting tool comprising a tool body (2) and a cutting head (30) with a coupling portion (31) receivable between axially projecting coupling legs (12) on the tool body. Each coupling leg has a torque transfer surface (15), which is configured to abut against a corresponding torque surface (35) on the cutting head in order to transfer torque from the tool body to the cutting head. Each one of said torque surfaces (35) on the cutting head is convex as seen in any plane that is perpendicular to the centre axis (C2) of the cutting head and extends across the torque surface (35), and / or the torque transfer surface (15) on each one of said coupling legs is convex as seen in any plane that is perpendicular to the centre axis (C1) of the tool body (2) and extends across the torque transfer surface (15).

This drill (1) comprises a shaft-shaped tool body (10) that is rotated about a central axis, the drill having a chip discharge groove (14) formed on the outer periphery of the tool body (10), and a cutting blade (15) formed at an intersecting ridge portion between the chip discharge groove (14) and a tip flank (13) of the tool body (10)). The tool body (10) has a base material and a hard coating (17) formed in a region of a prescribed length from the tip of the base material. The chip discharge groove (14) has, in the central axis direction, in order from the tip of the tool body (10), a first section (S1) having a first surface roughness and a second section (S2) positioned closer to the rear end side than the first section (S1) and having a second surface roughness less than the first surface roughness. The first section (S1) has a length of at least 0.5 times a tool diameter (D). The hard coating (17) is formed in the first section (S1), and a hard coating (S17) is not formed in the second section (S2).

The twist drill comprises a cutter handle and a cutting part, the cutting part is provided with a plurality of long spiral chip grooves and guide edge strips which extend towards the cutter handle in the direction of the central axis of the twist drill, the front ends of the long spiral chip grooves are provided with main cutting edges and chisel edges, and the side portions of the long spiral chip grooves are provided with taper milling areas. The taper milling area comprises a plurality of blade sections, taper spiral long blades, taper spiral short blades and short spiral chip grooves are arranged on the blade sections, the short spiral chip grooves and the long spiral chip grooves have the same rotation direction, the taper spiral long blades comprise N groups of micro milling blades which are connected in series along the spiral direction of the taper spiral long blades, the taper spiral short blade comprises N groups of micro-milling blades which are connected in series in the spiral direction of the taper spiral short blade, and the condition that N is larger than or equal to 2 is met, and the micro-milling blades are provided with chip dividing grooves with the spiral direction opposite to that of the long spiral chip discharging grooves, and the composite material drill bit has the advantages of being capable of being used for composite material drilling machining, high in drilling efficiency, high in machining precision, good in quality and the like.

The utility model provides an improved structure of a drill bit, which is characterized in that a cutting edge part is formed on one side of a handle part of the drill bit, and the cutting edge part comprises a cutting section and a chip groove extending from the cutting section to the handle part in a surrounding manner; the cutting section comprises two main cutting edges, a first edge face, a second edge face, two thinning cutting edges, thinning cutting inclined faces and at least one thinning auxiliary inclined face, wherein the first edge face and the second edge face are located on the side edges of the two main cutting edges and obliquely extend at different angles, and the thinning cutting inclined faces are located on the side edges of the two thinning cutting edges and incline at acute angles. The core thickness of the center of the drill bit is increased, and the cutting capacity of the drill bit is improved.

Rotating cutting tool, including: a shaft (12); and a replaceable cutting tip (14); wherein the shaft (12) includes a pocket (428) which receives the replaceable cutting tip (14) via a press fit; This pocket (428) comprises two centering wall sections (432) which, when viewed along a central longitudinal axis (A) of the shaft (12), are aligned to each other at a first angle (B), the first angle (B) being greater than zero; and an adjusting screw (840) which is mounted in the shaft (12) and is aligned at a second angle (E) to a plane transverse to the central longitudinal axis (A) in order to axially move the replaceable cutting tip (14) from a starting position to a clamping position, and to axially move the replaceable cutting tip (14) from the clamping position to an ejection position, wherein, in order to effect a displacement of the replaceable cutting insert (14) between the starting position and the clamping position: a first surface (948) of the adjusting screw (840) touches a second surface (950) of the replaceable cutting tip (14) via a first contact surface (958); the adjusting screw (840) moves in a first direction; and the replaceable cutting tip (14) then moves axially from the starting position into the clamping position, in which the adjusting screw (840) touches the replaceable cutting tip (14) via a second contact surface (960) which is larger than the first contact surface (958), wherein, in order to cause a displacement of the replaceable cutting tip (14) between the clamping position and the ejection position: a third surface (964) on the adjusting screw (840) touches a fourth surface (952) on the replaceable cutting tip (14) via a third contact surface (962); the adjusting screw (840) shifts in a second direction opposite to the first direction; and the replaceable cutting tip (14) then moves axially from the clamping position to the ejection position and where frictional forces from the press fit are overcome when the replaceable cutting tip (14) is moved from the clamping position to the ejection position.

A method of manufacturing a drill bit includes providing a piece of bar stock having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the bar stock between the first and second ends, cutting the first end of the bar stock to form a first tip angle at an oblique angle measured through the axis of rotation, cutting the first end of the bar stock at a second tip angle measured through the axis of rotation to form first tip surfaces and second tip surfaces. The first tip surfaces have the first tip angle and the second tip surfaces have the second tip angle. The second tip angle is smaller than the first tip angle. Finally forming a flute in the bar stock between the first and second ends and forming a shank at the second end of the bar stock.

A flat drill (1) with a shank (6) and a cutting part (8) with front-side main cutting edges (16), which each extend in a plane transversely to the drill axis (3) from a cutting edge corner (22) into the drill center. The flat drill (1) has exactly three main cutting edges (16), which converge at the drill axis (3).

Twist drill bit having a cutting tip (3) with a stepped structure, consisting of a shank (1), a guide region (2) and the adjoining cutting tip (3) with a stepped structure, the stepped structure of which is interrupted by two flutes (5) winding about a drill bit axis (0), wherein the cutting tip (3) with a stepped structure has a drill bit tip (3.1) with a radius (r0), at which a pair of first main lips (4.1) are formed, and a multiplicity of coaxially arranged cutting steps (3.2), which each have a conical step portion (3.2.1), in which in each case a pair of further main lips (4.2a-4.2m) are formed, and a cylindrical step portion (3.2.2), wherein the cylindrical step portions (3.2.2) have, towards the shank (1), an increasingly large radius (ra-rm), wherein the difference between in each case one of the radii and the next one of the radii (Δr) is chosen such that, upon rotation about the drill bit axis (0), the pair of further main lips (4.2a-4.2m) arranged therebetween sweep in each case over an annular face (Aa-Am), coaxial with the drill bit axis (0), on an imaginary plane (E) arranged perpendicularly to the drill bit axis (0), and the annular faces (Aa-Am) have an identical surface area, such that, during drilling, an identical chip volume is carried away with each pair of the further main lips (4.2a-4.2m).

A rotary cutting tool comprising a tool body (2) and a cutting head (30) with a coupling portion (31) receivable between two axially projecting coupling legs (12) on the tool body. Internal clamping surfaces (14) on the coupling legs are designed for press fit engagement with cylindrical external clamping surfaces (34) on the cutting head. Each internal clamping surface is conical and inclined at a small angle outwards away from the centre axis of the tool body as seen in a direction from an upper edge to a lower edge of the internal clamping surface, or divided into a cylindrical first sub surface (14a) and a conical second sub surface (14b) that is located axially rearward of the first sub surface and inclined at a small angle outwards away from the centre axis of the tool body as seen in a direction from an upper edge towards a lower edge of the conical second sub surface.

A carbon-based coating for a tool surface. The carbon-based coating sequentially comprises, from a tool surface to the outside, a high-content sp3 bond carbon layer, a gradient layer, and a high-content sp2 bond carbon layer, wherein the high-content sp3 bond carbon layer has an sp3 bond content of 50-80%, the high-content sp2 bond carbon layer has an sp2 bond content of 50-80%, and the sp3 bond content in the gradient layer decreases from high to low from the inside to the outside. In the carbon-based coating, a carbon layer mainly comprising an sp3 bond and a carbon layer mainly comprising an sp2 bond are separately provided, the former provides high hardness and wear resistance, and the latter has a low friction coefficient and good lubricity; the carbon-based coating has a gradient layer between the two carbon layers, so that a gradual transition is achieved between the properties of the two layers, avoiding the problem of poor bonding, improving stability, reducing the internal stress in the coating, avoiding the risk of easy breakage, achieving high thickness deposition.

The utility model discloses a multifunctional punching drill bit for composite materials, which relates to the technical field of punching drill bits and comprises a drill body, a connecting end is fixedly mounted at one end of the drill body, a tool bit is fixedly mounted at the other end of the drill body, and a scrap cleaning mechanism is arranged on the side wall of the drill body. The chip removing mechanism comprises a mounting frame and a plurality of blades, the mounting frame is fixedly mounted on the side wall of the drill body, the blades are fixedly mounted on the side wall of the drill body, and vent holes are formed in one side of the mounting frame; according to the technical scheme provided by the utility model, the scrap cleaning mechanism is adopted, when the drill body rotates, the blades can be driven to rotate, so that airflow can be driven to blow away powdery scraps around the hole, the hole can be conveniently observed by punching personnel, meanwhile, the step of manual cleaning is omitted, and the punching efficiency is higher.

The utility model discloses a high-stability deep hole machining drill bit which comprises a drilling rod, the inner wall of the drilling rod is connected with two symmetrical screws in a sliding mode, threads of the two screws are arranged reversely, the lower ends of the screws are fixedly connected with first limiting blocks, and the outer walls of the screws are connected with second limiting blocks in a threaded and sliding mode and located at the tops of the first limiting blocks. The outer wall of the second limiting block is rotationally connected with a rotating block, and the inner wall of the rotating block is in threaded connection with the outer wall of the screw. The drilling rod can slide on the screws, the drilling rod can be protected through a first limiting block and a second limiting block, meanwhile, the height of the second limiting block can be controlled by rotating a rotating block, and therefore the distance between the first limiting block and the second limiting block is adjusted to be matched with the drilling depth of the drilling rod, and meanwhile threads of the two screws are opposite, so that the drilling depth of the drilling rod is adjusted. Therefore, when the rotating blocks are rotated, the positions of the second limiting blocks can be adjusted by reversely rotating the two rotating blocks, and operation is convenient.

A drill 2 extends along an axis of rotation 4 and comprises at least three main cutting surfaces 6 which, starting from a cutting corner 8 arranged on a radius (r, figure 2), each extend in the direct

The present invention relates to a drill tool for metal cutting comprising a body with a chip flute section (1), which chip flute section (1) has a central longitudinal axis (4) extending rearward from a front end to a rear end along an axial length (5) of the chip flute section (1). The chip flute section (1) comprises a plurality of axially extending chip flutes (7), and a plurality of axially extending lands (12), which each extend rotationally behind a respective one of the plurality of chip flutes (7). Each land comprises a first margin surface (13), which is located rotationally directly behind the respective chip flute (7), and a first body clearance surface (15), which is located rotationally behind the first margin surface (13). Each land (12) further comprises a second margin surface (14), which is located rotationally behind the first body clearance surface (15), wherein the first body clearance surface (15) is wave-shaped, wherein the wave-shape is formed by in the axial direction alternating radially outer crest surfaces (22) and radially inner trough surfaces (23).

The utility model relates to an edge grinding auxiliary device for a twist drill. Comprising a grinding machine, a protective cover is arranged outside a grinding wheel of the grinding machine, an edge grinding device mounting unit is arranged on the protective cover, and an edge grinding unit matched with the grinding wheel is arranged at the top of the edge grinding device mounting unit; the cutter sharpening unit at least comprises a quick-change support, a self-aligning nut is arranged at the top of the quick-change support, a rotary stud is arranged in the self-aligning nut in a penetrating manner, a twist drill bushing is arranged on the end face of the outer side of the rotary stud, and the included angle between the rotary stud and the twist drill bushing is 90 degrees; an included angle between the center line of the aligning nut and the quick-change support is 31 degrees; the inner diameter of the twist drill sleeve is 0.1 mm larger than the outer diameter of the twist drill. And the up-and-down swinging rotation angle of the twist drill bushing is 20-30 degrees. The twist drill cutter sharpening device has the advantages of being simple in structure, reasonable in design and capable of reducing operation difficulty and improving working efficiency while guaranteeing the twist drill cutter sharpening progress.

Drill (2) having a drill bit (4), - wherein the drill bit (4) has at least one main cutting edge (8) with a cutting edge (10) from which the main cutting edge (8) extends to a center (12), - wherein the drill bit (4) has at least one additional cutting edge (22) with an additional cutting edge (24) from which the additional cutting edge (22) extends in the direction of the center (12), - wherein the additional cutting edge (22) is formed only on an outer section (26) of the drill tip (4) and is therefore shorter than the main cutting edge (8), - wherein the additional cutting corner (24) projects beyond the cutting corner (10) to distribute the load between the cutting corner (10) and the additional cutting corner (24).

The invention provides a novel twist micro drill and a laser processing track design method and a processing method thereof, and relates to the technical field of super-hard twist micro drills. The laser processing track design method comprises the following steps: constructing a main cutting edge curve of the novel twist micro drill; and the main cutting edge curve consists of three sections of cutting edge curves. And obtaining an end face curve of the novel twist micro drill according to the main cutting edge curve. The end face curve is composed of a drill edge curve and a groove back curve. And filling the laser processing area to form a laser processing track by taking the end face curve as a laser processing profile. When the processing path is generated, the path description is clear, the parameters are controllable, the processing contour can be stably reproduced according to the design geometry, and the deviation between the path and the target contour is reduced.

The present disclosure relates to technical field of woodworking drills, and in particular to a woodworking drill including: a cutter body; wherein an outer side wall of the cutter body defines a plurality of chip discharge slots that are spirally disposed, and the plurality of chip discharge slots are disposed circumferentially about a center axis of the cutter body; a cutter shank, connected to an end of the cutter body; and an alloy main drill structure, arranged at another end of the cutter body back away from the cutter shank; wherein a plurality of secondary cutting edges are formed on the outer side wall of the cutter body by the plurality of chip discharge slots, and the alloy main drill structure is configured for main drilling wood.

Method and means of manufacturing ties, fasteners and rods (15) having a plurality of longitudinal threads by forcing a coil of roll-profiled feed-wire made of steel (11) through a twisting-die made of plastic (1). Also described is: a twisting-die made of plastic (1) that is suitable for twisting profiled feed-wire (11) made of steel; a method of forming a plastic twisting die (1) using an axially driven tap (31) in the form of a twisted rod (15); and a helically-shaped member (15) having lead measurements (X) along the length of the helical thread that vary less than pitch measurements (Y) along the lengths of the helical threads.