35results about "Stepped drills" patented technology

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 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 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 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 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 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 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.

The invention relates to a drilling section for a hole machining tool, characterized in that the drilling section comprises: at least two chip flutes; each side part comprises a plurality of step part section parts, the step part section parts, belonging to the same serial number, on all the side parts form the same step part section, and each side part further comprises a transition part section part; a plurality of main cutting edges; a plurality of secondary cutting edges; at least one step section is designed as an asymmetrical step section, the same asymmetrical step section having in the circumferential direction at least two asymmetrical step section parts which are separated by flutes, which form, in accordance with at least two flutes, at least two asymmetrical cutting edges, and wherein at least one of the step sections is designed as an asymmetrical step section, said asymmetrical step section parts having, in the circumferential direction, at least two asymmetrical cutting edges, the at least two asymmetric tips have different radial distances from the working axis of rotation and are arranged axially offset from each other in the direction of the working axis of rotation. The invention further relates to a hole machining tool.

The present application relates to a drill bit for a hole machining tool, characterized in that the drill bit comprises: at least two flutes; a plurality of flanks, each flank comprising a plurality of step segment portions, all step segment portions of the same step segment number of all flanks forming one step segment, each flank further comprising a transition segment portion; a plurality of main cutting edges; a plurality of minor cutting edges; and a plurality of tip points, wherein at least one step segment is configured as an asymmetric step segment, the same asymmetric step segment having at least two asymmetric step segment portions separated by a flute in a circumferential direction, the at least two asymmetric step segment portions corresponding to the at least two flutes forming at least two asymmetric tip points, the at least two asymmetric tip points having different radial distances from a working rotational axis and being arranged axially offset in a direction of the working rotational axis with respect to each other. The present application also relates to a hole machining tool.

A step drill bit includes a shank and a body that defines a plurality of axially stacked, progressively sized steps including a first step, a terminal step, and a plurality of intermediate steps having incrementally increasing diameters disposed between the first and terminal steps. The step drill bit includes a flute in the body extending from the distal end to the proximal end and a plurality of cutting edges formed in the body. Each cutting edge is disposed along one of the plurality of steps. Each cutting edge defines a helix angle and a radial rake angle. The helix angle of the cutting edge at a first intermediate step of the plurality of intermediate steps is greater than the helix angle at the first step. The radial rake angle of the cutting edge at the first intermediate step is greater than the radial rake angle at the first step.

A drill bit for use with construction using cross laminated timbers (CLT) is provided. The bit has both sharpened and dull portions of the cutting element of the bit, so that it can clean- out an opening in the CLT that has been partially obscured by shifts in the laminated constituents of the CLT, without elongating or otherwise changing the shape of the fastener opening. The use of the bit is made at the construction site in fastener openings previously made and otherwise obscured, thereby allowing the quick assembly and construction of a structure made of CLT.

An asymmetric stepwise-cutting step drill bit, comprising a shank (1) and a working part (2). The front end of the working part is provided with a first cutting part (3) and a second cutting part (4); the first cutting part (3) comprises a first set of cutting vertical edges (301) and a first set of cutting chisel edges (302); the first set of cutting vertical edges (301) are connected to a first set of vertical edge relief surfaces (3011); the first set of cutting chisel edges (302) are connected to a first set of chisel edge relief surfaces (3021); the second cutting part (4) comprises a second set of cutting vertical edges (401) and a second set of cutting chisel edges (402); the second set of cutting vertical edges (401) are connected to a second set of vertical edge relief surfaces (4011); the second set of cutting chisel edges (402) are connected to a second set of chisel edge relief surfaces (4021). A drill bit head is regarded as two independent parts to be separately machined, so as to implement stepwise cutting to the greatest extent; in addition, respectively setting cutting angles of the two cutting edges may realize different combinations of cutting effects, so as to achieve the optimal combination of cutting speed, cutting durability, degree of cutting finish and cutting precision under different cutting conditions, thus making the machining more energy-efficient.

The application provides a high-efficiency drill bit for processing fiber composite material, which comprises a drill tip part, a chip removal part and a shank part; the drill tip part comprises a rake face, a relief face and a chisel edge; the rake face and the relief face intersect to form a main cutting edge; and the main cutting edge comprises a straight cutting edge and a concave parabolic cutting edge connected with each other. The high-efficiency drill bit for processing fiber composite material provided by the application forms the main cutting edge by the intersection of the straight cutting edge and the concave parabolic cutting edge, can effectively disperse the cutting resistance in the process of processing products, reduce the axial component force generated in the processing process, and can quickly cut off the fibers, thereby effectively reducing the burrs and delamination on the processed products. By using the high-efficiency drill bit for processing fiber composite material provided by the application, the holes obtained by processing the fiber composite material have high surface roughness precision grade, no burrs and delamination, and the product qualification rate and the processing efficiency of the fiber composite material product processing are effectively improved.

A drill bit (10) that includes: a shaft (12) extending along a drill axis (14); a transition section (16) which is connected to the shaft (12); a body section (18) having a front end (21) and comprising a plurality of axially superimposed, progressively increasing steps (20A-20M) including a first step (20A) at the front end and a last step (20M) connected to the transition section (16), wherein the first stage (20A) has two tip clamping grooves (42) which are each arranged at an angle of the tip clamping groove (44, 50) to the drill axis (14), the body section (18) further having two body clamping grooves (46) which each extend from the first stage (20A) to the transition section (16) and are arranged at an angle of the body clamping groove (48) which differs from the angle of the tip clamping groove (50); and a drill tip (21) located at the front end (21) of the body section (18) and having a cutting edge (28) that crosses the drill axis (14), wherein a first cutting surface (24) is located on one side of the cutting edge (28) and a second cutting surface (26) is located on an opposite side of the cutting edge (28), wherein the first cutting surface (24) has a first clearance angle (36) and the second cutting surface (26) has a second clearance angle (38) which differs from the first clearance angle (36); wherein each tip-chipping groove (42) extends to the first cutting surface (24) or the second cutting surface (26) to define at least part of an edge (32) of the first cutting surface (25) or the second cutting surface (26); wherein the angle of the body clamping groove (48) of each body clamping groove (46) is formed as a compound angle defined by a first angle of the body clamping groove (48) and a second angle of the body clamping groove (72), wherein the first angle of the body clamping groove (48) is measured between a center line (72) of each body clamping groove (46) and the drill axis (14) in a first plane, and the second angle of the body clamping groove (72) is measured between the center line (71) of each body clamping groove (46) and the drill axis (14) in a second plane which is orthogonal to the first plane; wherein the first angle of the body span groove (48) is between about 4.5 degrees and about 5.5 degrees, and wherein the second angle of the body span groove (72) is between about 1 degree and about 3 degrees.

The invention discloses a carbon fiber composite material progressive drilling technology and a drill bit, and relates to the technical field of carbon fiber composite material machining, the carbon fiber composite material progressive drilling technology comprises the steps of laying layer identification, progressive cutting and outlet protection, and through the laying layer identification technology, the thickness of each laying layer in a carbon fiber composite material can be accurately measured; and accurate data support is provided for subsequent cutting processing. In the progressive cutting stage, according to the axial force change rate monitored by the built-in piezoelectric plate in real time, the feeding speed and the cooling liquid flow are flexibly adjusted, concentration of axial impact force and sharp rising of the cutting temperature are effectively avoided, and therefore the problems of fiber tearing, layering, matrix carbonization and the like are remarkably reduced. Meanwhile, due to the implementation of an outlet protection strategy, the integrity of a drilling outlet layer is further ensured, and the machining quality of the workpiece is improved.

The present invention relates to a drilling part for a hole drilling tool, the drilling part having at least two chip flutes and a plurality of sides, wherein each side has a plurality of step segment portions, and step segment portions with the same serial number on all sides form a single step segment, and each side further has a transition segment portion, and has a plurality of major cutting edges, a plurality of minor cutting edges, and a plurality of cutting edge tips, wherein at least one step segment is formed as an asymmetric step segment, and the single asymmetric step segment has at least two asymmetric step segment portions separated in the circumferential direction by a chip flute, and the at least two asymmetric step segment portions and the at least two chip flutes correspondingly form at least two asymmetric cutting edge tips, the at least two asymmetric cutting edge tips having different radial distances from an operating rotation axis and being axially offset relative to each other in the direction of the operating rotation axis.