50results about "Stepped drills" patented technology

This drill has an integrally formed extension (3) at its front end, which is smaller in diameter than the other drill bit (1). The extension (3) at the front end of the drill bit (1) preferably has a diameter d that is half the diameter D of the remaining drill bit (1) located behind the extension (3). The drill bit allows for perfect positioning, centering, and guidance of the hole along the intended drilling line.

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.

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).

The invention belongs to the technical field of drill bits, particularly relates to a special drill bit for a honeycomb aluminum plate, and aims to solve the problems that when an existing drill bit is used for machining a honeycomb aluminum material, the machining precision and the surface quality are often difficult to guarantee, and meanwhile, the machining efficiency is low. The drill bit head is connected to one end of the drill bit main body; the main cutting edge is arranged on the drill bit head; the first auxiliary blade and the second auxiliary blade are both arranged on the drill bit head and used for trimming cutting edges, the outer side of the drill bit head is coated with a wear-resistant coating, and the wear-resistant coating is a composite coating composed of titanium nitride and tungsten carbide. By means of the combined design of the stepped main cutting edge, the first auxiliary edge and the second auxiliary edge and the optimized geometric parameters and wear-resistant coating technology, efficient and accurate machining of the honeycomb aluminum material is achieved, machining defects are reduced, and machining quality and efficiency are improved.

A stepped deep hole drilling tool is proposed that improves the supply of coolant to the cutting edges and chip removal. Furthermore, the stepped deep hole drilling tool is economical to manufacture.

A drill, in particular for drilling metal, having a cutting part (12a; 12b) which has a drill point (14a; 14b) and at least two helical grooves (16a, 16'a; 16b, 16'b) which extend from the drill point (14a; 14b) to an end of the cutting part (12a; 12b) opposite the drill point (14a; 14b) and, in the region of the drill point (14a; 14b), each lead into a thinned region (18a, 18'a; 18b, 18'b), wherein the thinned regions (18a, 18'a; 18b, 18'b) form a cross-grinding, wherein the thinned regions (18a, 18'a; 18b, 18'b) each have an opening angle (19a; 19b) of less than 30°.

Drilling tool for creating a bore with a cylindrical inner wall, a) wherein the drilling tool is rotatable in a rotary motion with a predetermined direction of rotation (VD) about a tool axis (A) passing through the drilling tool and at the same time is movable in an axial forward motion (VB) in a forward direction axial to the tool axis, b) wherein the drilling tool comprises at least one drilling area (3) which is arranged in a forward-directed area of ​​the drilling tool at a front or free end and has a drill tip (35), c) wherein the drilling area has a number n ≥ 3, i.e. at least three, drilling cutting edges (31, 32, 33) which are arranged offset from each other in the direction of rotation, where n is a natural number, d) wherein each of the n cutting edges (31, 32, 33), viewed radially to the tool axis (A), has an outer cutting edge (31A, 32A, 33A) and an inner cutting edge (31B, 32B, 33B), e) wherein the outer cutting edge of the drill (31A, 32A, 33A) is substantially perpendicular to the tool axis (A) and f) wherein the inner cutting edge of the drill (31B, 32B, 33B), viewed in the axial forward direction, rises towards the tool axis (A) towards the drill tip (35), g) wherein at least one chip divider (11, 12, 13) is arranged on each of the n cutting edges, forming an interruption of the respective cutting edge. h) wherein at least one, preferably two, of the n drilling cutting edges (31, 32) the associated at least one chip divider (11, 12) is arranged on the associated outer drilling cutting edge (31A, 32A) and i) on at least one, preferably exactly one, of the n drill cutting edges (33) the associated at least one chip divider (13) is arranged on the associated inner drill cutting edge (33B).

A drill bit including a body extending from a shank to a point angle, wherein the body includes a plurality of steps each associated with a different cutting diameter; a first groove disposed between a first pair of adjacent steps of the plurality of steps and radially inset from an outer diameter of each of the first pair of adjacent steps; and a first visual indicator disposed in the first groove.

A rotary tool may include a base. The base may be extended from a first end to a second end. The base may include a first part and a second part. The first part may include the first end. The second part may have a larger outer diameter than the first part. The first part may include a first flute. The second part may include a second flute. In a first cross section of the first part, the first flute may include a first bottom part. A center of a first imaginary circle overlapping with the first bottom part may be located outside a circumscribed circle of the first part. In a second cross section of the second part, the second flute may include a second bottom part. A center of the second imaginary circle overlapping with the second bottom part may be located inside a circumscribed circle of the second part.

A drill bit (10) for hand-guided drilling of a blind hole with a blind hole diameter and a blind hole depth into a metal workpiece, including a shank (20) which defines a drilling direction (30) and has an axis of rotation oriented in the drilling direction, wherein the shank has a cutting edge (50) at its end pointing in the drilling direction and has a stop shoulder (55) at a distance from the cutting edge defining the blind hole depth and measured counter to the drilling direction, wherein the cutting edge defines the blind hole diameter by rotation about the axis of rotation, wherein the shank has an enveloping circle diameter that changes along the axis of rotation and is larger at the stop shoulder than the blind hole diameter, wherein the shank has a first shank section (40) which adjoins the stop shoulder counter to the drilling direction and which reaches up to the stop shoulder and in which the enveloping circle diameter, starting from the stop shoulder, increases counter to the drilling direction.

The present invention relates to a drill 10 for drilling a blind hole having a blind hole diameter and a blind hole depth, which is guided by hand to a workpiece made of metal, and includes a shaft 20 defining a drilling direction 30 and having a rotation axis oriented in the drilling direction. The shaft has a cutting edge 50 at its end facing the drilling direction and an abutting shoulder 55 at a certain distance from the cutting edge, which is measured in the direction opposite to the drilling direction and defines the blind hole depth. The cutting edge defines the blind hole diameter by rotation about the rotation axis. The shaft has an envelope circle diameter that varies along the rotation axis and is larger than the blind hole diameter at the abutting shoulder. The shaft has a first shaft portion 40 adjacent to the abutting shoulder in the direction opposite to the drilling direction. The first shaft portion extends up to the abutting shoulder, and its envelope circle diameter increases starting from the abutting shoulder in the direction opposite to the drilling direction.

An alloy tool bit twist drill, comprising a tool shank, a spiral tool body (4) and an alloy tool bit (31). A groove is milled on a spiral cutting surface (13) of the spiral tool body, the alloy tool bit (31) is integrally arranged on the spiral cutting surface, the spiral cutting surface (13) and a cutting surface of the alloy tool bit (31) are arranged in the same groove, and a central stepped platform (10) is arranged on the cutting surface near the axis center of the alloy tool bit (31). A central stepped surface (12) is arranged on the inner side of the central stepped platform (10) protruding in the rotating direction; or a branch hole table (23) and a branch cutting surface (24) are concavely arranged on the cutting surface of the alloy tool bit (31) in a stepwise manner in the direction from the axis center to the outer periphery; or a micro cutting surface (18) is concavely formed on the cutting surface of the alloy tool bit (31) from a spiral cutting edge (17) toward the axial center direction, and a micro-strengthening stress extension table (20) is formed on the inner side of the micro cutting surface (18) in a standing mode. The alloy tool bit twist drill has such advantages as high stability, efficient heat dissipation, long service life and easy positioning in drilling.

The Huntsman Bit is a Forstner-style drill bit designed to precisely enlarge existing holes, even when a center alignment point is no longer present. It features a non-cutting leading edge that acts as a self-aligning guide within a previously drilled hole, preventing lateral drift and protecting the material surface. Positioned above the guide is a step-cutting edge that incrementally increases the hole diameter with control and accuracy. Constructed from durable steel alloy, the bit is offered in both SAE and metric sizes, with diameters consistent with standard Forstner bit ranges. The design enables versatile application in woodworking and carpentry where reliable hole enlargement is required.

The present invention relates to a drilling part (4) for a hole processing tool, characterized in that the drilling part (4) comprises at least two chip-discharging flutes (3); a plurality of sides, each side comprising a plurality of step segment portions (Tn), the step segment portions of the same serial number or all sides form a single step segment, each side further comprising a transition segment portion (12); a plurality of major cutting edges; a plurality of minor cutting edges; and a plurality of cutting-edge tips (9), wherein at least one step segment is formed as an asymmetric step segment, and a single asymmetric step segment having at least two asymmetric step segment portions separated by a chip-discharging flute in a circumferential direction, the at least two asymmetrical step segment portions and at least two chip-discharging flutes forming correspondingly at least two asymmetrical cutting-edge tips, the at least two asymmetrical cutting-edge tips having different radial distances from a working rotational axis and being axially offset relative to each other in the direction of the working rotational axis. The present invention further relates to a hole processing tool.

A drilling part of a hole machining tool and a hole machining tool. The drilling part (4) comprises: at least two flutes (3); a plurality of side parts, each side part comprising a plurality of step section (Tn) portions, step section portions on all side parts belonging to a same serial number forming a same step section, and each side part further comprising a transition section portion (12); a plurality of major cutting edges (7); a plurality of minor cutting edges (8); and a plurality of cutting tips (9). At least one step section is configured as an asymmetrical step section, a same asymmetrical step section has in the circumferential direction at least two asymmetrical step section portions which are separated by the flutes, the at least two asymmetrical step section portions and at least two flutes correspondingly form at least two asymmetrical cutting tips, the at least two asymmetrical cutting tips have different radial distances (ri,ri ') from the working rotation axis and are axially staggered relative to each other in the direction of the working rotation axis. The drilling part and the hole machining tool avoid the offset of the working rotation axis, ensure the size precision of the final hole diameter, and avoid the generation of cutting resonance of the same frequency and period.

The present drill point arrangement includes a first and second land defined by a first and second flute, with a first cutting tip and a second cutting tip formed on the first and second lands respectively. The first cutting tip being positioned a first radial distance and the second cutting tip being positioned a second radial distance, each measured from the axis of rotation. The second cutting tip is positioned next in cutting tip sequence to the first cutting tip, and the second radial distance of the second cutting tip is greater than the first radial distance of the first cutting tip. Optionally, the first cutting tip is positioned a first axial distance and the second cutting tip is positioned a second axial distance, each measured from the front tip, and the second axial distance is greater than the first axial distance.

A drill, in particular for drilling metal, includes a cutting part which has a drill point and at least two helical grooves which extend from the drill point to an end of the cutting part opposite the drill point, and in the region of the drill point, each lead into a thinned region. The thinned regions form a cross-grinding. The thinned regions each have an opening angle of less than 30°.

A step drill bit including a shank extending along a bit axis and a body having a proximal end adjacent the shank and a distal end opposite the proximal end. The body includes a bit tip adjacent the distal end. The bit tip includes a diameter in a direction perpendicular to the bit axis. The body defines a plurality of axially stacked, progressively sized steps including a first step adjacent and a terminal step. Each step of the plurality of steps defines a length and a diameter. The step drill bit also includes at least one flute in the body. Each flute extends from the distal end to the proximal end. The step drill bit includes a cutting edge on the flute. A ratio of the diameter of the bit tip to the length for a majority of the plurality of steps is in a range from 1.0 to 1.5.

The invention relates to a drill bit, in particular for drilling metal, having a cutting portion (12a; 12b) having a bit tip (14a; 14b) and at least two slave bit tips (14a; 14b) to the cutting portion (12a; 12b) and the drill bit tip (14a; 16a, 16b) at the opposite ends of the helical grooves (16a, 16'a; 16b, 16 'b), which helical flutes (16a, 16b; 18a, 18b) in each case in the region of the tip (18a, 18'a; 18b, 18'b), said sharpened portions (18a, 18'a; 18a, 18b, 18'b) form a cross-shaped grinding portion, in which the sharpened portion (18a, 18'a; 18b, 18 'b) each have an opening angle (19a; 19b) of less than 30 degrees; 19b) for a motor vehicle.

The present invention provides a twist drill. A cone portion is provided at a front end of the operating portion, and an exterior surface of the operating portion is provided with a spiral flute for shunting cutting chips. The exterior surface of the cone portion is provided with a plurality of composite cutting blade groups which are sequentially enlarged in diameter from the front end to the rear end of the cone portion. The cone portion is provided with a top blade on the tip. In use, the top blade is used for positioning, and the cutting process is carried out by the top blade and the composite cutting blade groups.

The present invention relates to a tool blank (30) for a cutting tool (1), such as an end mill, drill or engraving tool, comprising a tool shank (2) adapted to be received in a rotary tool holder of a processing machine and a cutting head blank (3) fixedly connected to the tool shank (2). The cutting head blank (3) comprises a plurality of cutting head blank elements (5) which are fixedly connected to one another, preferably soldered to one another and made of a hard material, in particular polycrystalline diamond. Furthermore, the present invention relates to a cutting tool (1), such as an end mill, drill or engraving tool, in which at least one tool cutting edge (15) is generated in the tool blank (30) according to the invention, which extends over the plurality of fixedly interconnected cutting head blank elements (5). Furthermore, the present invention relates to a method for manufacturing a tool blank and a method for manufacturing a cutting tool.

A step drill and a method for drilling a hole in a workpiece by using the step drill, the step drill having a hole-cutting portion (3) and at least two flutes (5, 5') extending on the hole-cutting portion, the hole-cutting portion (3) having step sections, each step section and the at least two flutes (5, 5') forming at least two cutting edges (An, An') distributed in the circumferential direction of the step section, the at least two cutting edges on at least one of the step sections having at least a first cutting edge (An) and a second cutting edge (An'), each of the first cutting edge (An) and the second cutting edge (An') being arranged in at least two segments. The drill bit is constructed with a first cutting edge (An) and a second cutting edge (An'), each of which therefore comprises at least two cutting edge segments, and the first cutting edge (An) and the second cutting edge (An') are at least partially different from each other in the structure of their cutting edge segments, or one of the first cutting edge (An) and the second cutting edge (An') is formed in one segment, while the other cutting edge is formed in at least two segments, and a method for drilling a hole in a workpiece by using a stepped drill comprises cutting a first material portion on the workpiece using the first cutting edge (An) and cutting a second material portion on the workpiece using the second cutting edge (An'). By changing the cutting length and the angle value of the cutting angle of the cutting edges of the drill bit, the cutting force is reduced and the cutting sharpness is improved.

The invention relates to a rotary cutting tool (1), such as a drill (2) or a reamer (3), extending longitudinally along an axis (4) and comprising at least one main cutting edge (5) so that when the tool (1) is rotated about the axis (4), the tool (1) advances axially to perform a cutting operation on a material.According to the invention, the tool (1) comprises means for braking (7) the axial advance of the tool (1) during the cutting operation.

The invention relates to a tool comprising a shaft (1) that can be driven about an axis of rotation (A) and a rotatably operating tool head (3) that is connected to said shaft and has a working section (8) extending over an axial distance, a depth limiter (12) that can be fixed to the shaft (1) in different axial positions by means of a radially movable restraining element comprising an abutment surface (21) lying in the axial positions in the working section (8). The shaft (1) has a plurality of positioning recesses (10) arranged on a spiral load curve (9) and the restraining element a tip (15) that selectively engages in one of the plurality of positioning recesses (10). The axial distance (b) between the centres of two directly adjacent positioning recesses (10) is less than the diameter (D) of the positioning recess (10).

The invention provides a drill bit, in particular serpentine drill, more in particular an auger bit, comprising a circumferential chip removal groove helically about a drill axis and a centering tip having a conical shape with an apex on said drill axis, comprises a lateral cone surface that has a taper angle, comprising a centering tip helical thread which spirals helically from said apex down said centering tip in a thread direction of rotation at a tip thread pitch, and comprising at least one tip recess in a side of the centering tip which provides a cutting edge, an which has a chiptransporting shape and connecting to said circumferential external thread, characterized in that said cone surface comprises at least one step in said taper angle of said lateral surface with each step starting at a step-start position and said at least one step continues about said drill axis at least 90 degrees.

The present invention relates to an apparatus, system, and method for forming aligned holes from misaligned holes. The apparatus includes a reamer having a first portion of a constant diameter and a second, tapered portion. A constant-diameter guide member is attached to the reamer. The tapered portion can be configured to center the reamer and reduce the offset between the apparatus and the centerline of a virtual hole created by the misaligned hole. The constant diameter of the guide member corresponds to the virtual hole, and the constant diameter of the first portion of the reamer corresponds to a clearance hole that is configured to receive an oversize fastener and completely surround the misaligned hole. If the guide member cannot pass through the misaligned hole, an apparatus with a smaller-diameter guide member and a larger-diameter reamer is required to create a clearance hole that completely surrounds the misaligned hole.

The present drill point arrangement includes a first and second land defined by a first and second flute, with a first cutting tip and a second cutting tip formed on the first and second lands respectively. The first cutting tip being positioned a first radial distance and the second cutting tip being positioned a second radial distance, each measured from the axis of rotation. The second cutting tip is positioned next in cutting tip sequence to the first cutting tip, and the second radial distance of the second cutting tip is greater than the first radial distance of the first cutting tip. Optionally, the first cutting tip is positioned a first axial distance and the second cutting tip is positioned a second axial distance, each measured from the front tip, and the second axial distance is greater than the first axial distance.

A drill bit including a body extending from a shank to a point angle, wherein the body includes a plurality of steps each associated with a different cutting diameter; a first groove disposed between a first pair of adjacent steps of the plurality of steps and radially inset from an outer diameter of each of the first pair of adjacent steps; and a first visual indicator disposed in the first groove.

A drill bit includes a shank and a body portion defining a plurality of axially stacked, progressively sized steps. The steps include a first step and a terminal step. The first step defines two tip flutes each disposed at a tip flute angle. The body portion defines a body flute extending through the steps. The drill bit also includes an indicator band formed on a portion of the body flute and a portion of an outer surface of one of the plurality of steps.

A drill bit comprising: a body extending from a shank to a sharp corner, where the body comprises a plurality of steps, each step associated with a different cutting diameter; a first groove disposed between a first pair of adjacent steps of the plurality of steps and recessed in a radial direction from an outer diameter of each of the first pair of adjacent steps; and the first visual indication part is arranged in the first groove.