Drilling tool

Abstract

The invention relates to a drilling tool, in particular rock drilling tool (11), having a drilling portion (15), in particular hard metal drilling portion, for working a workpiece and having a shaft portion (17), in particular a shaft portion that extends along a longitudinal axis (A), and also having a guide region (55) for guiding the drilling tool (11), the guide region (55) being at an angle with respect to a longitudinal axis (A) of the drilling tool (11).

Description

[0001] Description

[0002] title

[0003] The invention relates to a drilling tool according to the preamble of claim 1.

[0004] State of the art

[0005] Drilling tools are already known from the state of the art.

[0006] Disclosure of the invention

[0007] The invention is based on the object of improving a drilling tool, in particular a rock drilling tool, using simple design measures.

[0008] The object is achieved with a drilling tool, in particular a rock drilling tool, with a drilling section, in particular comprising a hard metal, for machining a workpiece and with a shaft section, in particular extending along a longitudinal axis.

[0009] It is proposed that the drilling tool has a transport recess for transporting particles, in particular extending transversely to a longitudinal axis.

[0010] To increase the performance of drilling tools, conventional drilling tools are based, for example, on a number of cutting elements. Performance can increase with an increasing number of cutting elements. Performance can be further increased using suction drilling tools and the associated suction openings arranged on the drilling tool. In particular, when using drilling tools with a large number of cutting elements, jamming can be reduced and thus service life can be increased; however, this makes it more difficult to optimally position an extraction opening on the drilling tool. Especially with drilling tools with a small diameter, an arrangement of suction openings can reduce the strength of the drilling tool, which can reduce service life.

[0011] This allows drilling tools with relatively small diameters to provide optimal extraction.

[0012] In particular, the drilling tool is designed as a rock drilling tool. In particular, the drilling tool is designed for a cutting and / or a pushing working movement. During a cutting working movement, the drilling tool has, in particular, a cutting element that is rotated about a longitudinal axis (axis of rotation) of the drilling tool. During a pushing working movement, the drilling tool has, in particular, a pushing element, preferably a chisel element, that is moved along a longitudinal axis. In particular, the cutting element and the pushing element are formed as one piece and are preferably arranged on a drilling section of the drilling tool. The cutting element and / or the pushing element can form a drilling element.

[0013] In particular, the drilling section is arranged at a first end of the drilling tool. Preferably, the drilling section, in particular at the end face, is provided for direct and / or indirect contact with a workpiece to be machined. Preferably, the drilling section is formed substantially from a different material or material composition than the shaft section. Preferably, the drilling section is formed substantially from a hard metal. Common hard metals or hard metal compositions, such as tungsten carbide (cobalt) (WC-Co), titanium carbide, tantalum niobium carbide, zirconium carbide (ZrC), titanium nitride, etc., are known to those skilled in the art.

[0014] In particular, the shaft section is arranged at a second end of the drilling tool, in particular one facing away from the first end. The drilling tool, in particular the shaft section, is preferably intended to be received by a handheld power tool, preferably a hammer drill or an impact drill. For this purpose, the drilling tool, in particular the shaft section, has a receiving area at an end facing away from the drilling section. The receiving area is preferably designed for coupling to a handheld power tool, such as a hammer drill. The drilling tool, in particular the receiving area, is preferably designed such that the drilling tool can be coupled to a tool holder of the handheld power tool.Preferably, the drilling tool, in particular the receiving area of ​​the drilling tool, has a form-locking element designed as a groove, which forms at least part of an SDS-plus interface or an SDS-max interface.

[0015] In particular, the drilling section is formed, in particular entirely, from a drilling head element. Alternatively, the drilling section can be formed from a drilling plate element. Preferably, the shaft section is formed, in particular entirely, from a shaft body element. The drilling head element preferably has a, in particular planar, connecting region which can be connected to a connecting region of the shaft body element, in particular by means of a material-to-material connection. In particular, the drilling section is connected to the shaft section, preferably in one piece, preferably by means of a welding process, welded or soldered by means of a soldering process. A welded connection is preferably a permanent connection of components using heat and / or pressure, with or without welding filler materials.

[0016] During machining, the drilling tool penetrates the workpiece in the feed direction of the drilling tool. The feed direction of the drilling tool runs coaxially with a longitudinal axis of the drilling tool and, starting from the shaft section, toward the drilling section. In particular, the longitudinal axis of the drilling tool coincides with a drilling or rotation axis of the drilling tool during operation of the drilling tool. In particular, the transport element extends perpendicular to a longitudinal axis. In particular, the transport recess is arranged, in particular completely, in the drilling section and / or in the shaft section.

[0017] In particular, the transport recess is provided for transporting particles, in particular drilling particles or rock particles. The transport recess is preferably designed as a transport channel. The transport recess is preferably designed for the passage of particles. The transport recess is preferably provided for guiding an air stream, in particular a particle air stream, along the transport recess.

[0018] This allows for particularly easy removal of particles.

[0019] It may be expedient for the drilling section to have a drilling element, in particular designed as a cutting element. In particular, the transport recess is arranged between the drilling element and the shaft section, viewed along the longitudinal axis.

[0020] In particular, the drilling element is designed as a cutting element and / or impact element. Preferably, the drilling element is arranged on the end face of the drilling tool. Preferably, the drilling element limits an extension of the drilling tool along the longitudinal axis. Preferably, the drilling element is formed from a hard metal. In particular, the drilling element extends from a longitudinal axis or a rotational axis of the drilling tool transversely to the longitudinal axis, in particular up to a circumferential region of the drilling tool. Preferably, the drilling element is designed to be, in particular completely, rectilinear. Preferably, the drilling element is designed to be, in particular completely, curved. Preferably, the drilling element is designed to be partially rectilinear and / or partially curved. In particular, the drilling element is designed to be, in particular strictly, monotonically decreasing, viewed along the longitudinal axis in the direction of the shaft section.

[0021] Further preferably, a plurality of drilling elements is provided. In particular, the drilling section comprises a further drilling element. Preferably, the further drilling element is angled and / or spaced relative to the drilling element in the circumferential direction around the longitudinal axis. In particular, the drilling elements open into the longitudinal axis or rotational axis and form a drill tip of the drilling tool.

[0022] It may be expedient for the transport recess to be designed as a through-hole. In particular, the transport recess designed as a through-hole extends through the entire drilling tool. The transport recess preferably extends transversely, in particular perpendicularly, to the longitudinal axis of the drilling tool. The transport recess preferably extends from one side, in particular a circumferential side, to another side, in particular a further circumferential side, of the drilling tool. The transport recess preferably extends in a straight line.

[0023] This can prevent clogging of the transport recess by allowing particles to be conveyed from two sides of the drilling tool and compensate for each other if one side is clogged.

[0024] It may be expedient for the transport recess to be delimited, viewed along the longitudinal axis, by the shaft section, in particular the shaft body element. In particular, the transport element is delimited, viewed along the longitudinal axis, in particular completely, by the drill head element. The transport recess is preferably arranged in the drill section.

[0025] It may be expedient for the transport recess to be arranged on the drilling section such that the longitudinal axis intersects the transport recess. In particular, the transport recess can be arranged below a drill bit of the drilling tool, viewed along the longitudinal axis. Preferably, the longitudinal axis or the rotational axis can run through the drill bit. This minimizes weakening of the drilling tool and maximizes force transmission to torsionally loaded sections.

[0026] It may be expedient for the drilling tool to have an air inlet opening for providing an air flow to the transport recess. In particular, the air inlet opening is arranged in the circumferential direction around the longitudinal axis on the drilling tool, in particular on the drilling section. The air inlet opening preferably extends substantially along the longitudinal axis. The air inlet opening is preferably arranged in the drilling section. The air inlet opening is preferably delimited by the drill head element and / or the shaft body element. The air inlet opening is preferably closed. In particular, the air inlet opening is surrounded on the circumferential region in a plane of 360° by the drill head element and / or the shaft body element.

[0027] The drilling tool preferably has a further air inlet opening for providing an air flow to the transport recess. In particular, the further air inlet opening is arranged on a peripheral region of the drilling tool facing away from the air inlet opening.

[0028] It may be expedient for the drilling tool to have an air outlet opening for providing an air flow through the transport recess. In particular, the air outlet opening is arranged transversely, in particular perpendicularly, to the air inlet opening. Preferably, the air outlet opening is arranged on the shaft section. Preferably, the air outlet opening surrounds the longitudinal axis of the drilling tool. Preferably, the air outlet opening intersects the longitudinal axis. More preferably, the air outlet opening extends transversely, in particular perpendicularly, to the longitudinal axis of the drilling tool. In particular, the air outlet opening delimits the shaft section along the longitudinal axis of the drilling tool.

[0029] It may be expedient for the drilling tool to have a guide region for guiding the drilling tool. In particular, the guide region extends in the circumferential direction around the drilling section. In particular, the guide region is arranged in the circumferential direction around the longitudinal axis adjacent to the air inlet opening. Preferably, the guide region is arranged on a circumferential region of the drilling tool. Further preferably, the guide region is designed to guide a rotational and / or a translational movement of the drilling tool. It may be expedient for the guide region to delimit the drilling tool transversely, in particular perpendicularly, to the longitudinal axis of the drilling tool. Preferably, the guide region forms a maximum radial distance from the longitudinal axis or the axis of rotation of the drilling tool. Preferably, the guide region extends along, in particular parallel, to the longitudinal axis of the drilling tool.Preferably, the guide region limits an extension of the drilling section along the longitudinal axis.

[0030] Further preferably, the guide region limits an extension of the drilling element, in particular transversely, preferably perpendicularly, to the longitudinal axis of the drilling tool.

[0031] It may be expedient for the drilling tool to have an additional guide area for guiding the drilling tool. In particular, the air inlet opening is arranged circumferentially between the two guide areas.

[0032] It may be expedient for the drilling tool to have a further transport recess. In particular, the further transport recess is arranged in the shaft section. Preferably, the further transport recess borders on or extends into the transport recess. In particular, the further transport recess extends along, in particular parallel to, the longitudinal axis. In particular, the further transport recess surrounds the longitudinal axis, in particular completely. In particular, the further transport recess is formed as a through-bore in the shaft section.

[0033] It may be expedient for the guide region to be angled relative to a longitudinal axis of the drilling tool. It may be expedient for the guide region to be angled relative to the longitudinal axis in such a way that friction in the circumferential direction is reduced. In particular, the guide region has a longitudinal extension. The guide region preferably extends along the longitudinal axis. The guide region preferably extends in the circumferential direction, in particular helically, around the longitudinal axis. This allows particles generated during drilling to be optimally removed. The drilling effect can also be increased by an improved effective direction of the drilling tool and a more optimized force flow. Furthermore, the drilling speed can be increased and wear reduced. This can increase the service life.

[0034] It may be expedient for the guide area, in particular a longitudinal extension of the guide area, to be angled against a rotational movement.

[0035] It may be expedient for the guide region to have a guide edge. In particular, the guide edge delimits the guide region, in particular in a circumferential direction around the longitudinal axis. The guide edge preferably extends helically around the drilling tool, in particular the drilling section of the drilling tool. The guide edge preferably has a curve with a constant and / or varying pitch around the drilling section of the drilling tool.

[0036] It may be expedient for the drilling section to have a drilling element, in particular designed as a cutting element, which is delimited transversely, in particular perpendicularly, to the longitudinal axis by the guide region. In particular, the cutting element is delimited radially relative to the longitudinal axis.

[0037] It may be expedient for the drilling element to have a drilling edge defined by a boundary edge positioned upstream in the direction of rotation and a boundary edge positioned downstream opposite to the direction of rotation. In particular, the downstream boundary edge is larger than the upstream boundary edge, in particular by at least 200%, preferably by at least 250%, and more preferably by at least 300%.

[0038] It may be expedient for the guide area to be delimited along the longitudinal axis by an upper limiting edge on a side facing away from the shaft section and by a lower limiting edge on a side facing the shaft section. In particular, the extents of the two edges (upper limiting edge and lower limiting edge) overlap in the circumferential direction and along the longitudinal axis, in particular by more than 20%, preferably by more than 40%, preferably by more than 60%, and particularly preferably by more than 80%. This allows for the optimal transmission of force flow from the shaft section to the drill section in the event of an impact.

[0039] It may be expedient for the drilling tool to have a drill bit, in particular a drill bit, for machining a workpiece. In particular, a plane spanned along and perpendicular to the longitudinal axis intersects the drill bit, the upper boundary edge, and the lower boundary edge of the guide area.

[0040] It may be expedient for the drilling tool to have a transport groove for transporting particles along the longitudinal axis of the drilling section. In particular, the guide area, in particular the guide edge, delimits the transport groove in the circumferential direction around the longitudinal axis.

[0041] The transport groove can have a first transport groove section. The first transport groove section can be arranged on the drilling section, in particular the drill head element. The first transport groove section can be arranged in the circumferential direction between two cutting elements. The first transport groove section can have a transport groove surface, in particular a curved one. The transport groove surface can extend from one cutting element to the next cutting element.

[0042] The second transport groove section can be arranged on the shaft section, in particular the shaft body element. The second transport groove section can adjoin or open into the first transport groove section.

[0043] The second transport groove section can have a first transport region. The first transport region can be set back from the first transport groove section when viewed in the radial direction. The first transport region can have a, in particular minimal, radial distance from the longitudinal axis, which is parallel when viewed along the longitudinal axis. The first transport region has a constant extension in the circumferential direction when viewed along the longitudinal axis. The second transport groove section can have a second transport region. The second transport region can adjoin the first transport region. The second transport region can be angled with respect to the longitudinal axis. The second transport region can have a, in particular minimal, radial distance from the longitudinal axis, which is transverse, in particular angled, when viewed along the longitudinal axis.The second transport region reduces the cross-section of the shaft body element. Viewed along the longitudinal axis, the second transport region has an increasing extension in the circumferential direction, particularly in a direction facing away from the drilling section.

[0044] The second transport groove section can have a third transport region. The third transport region can have a radial distance, in particular a minimal distance, from the longitudinal axis, which is parallel when viewed along the longitudinal axis. The third transport region and the cover element form the suction opening. The third transport region has a constant extension in the circumferential direction when viewed along the longitudinal axis.

[0045] The first transport area adjoins the drill head section on one side and the second transport area on the other, and is arranged therebetween. The second transport area is arranged between the first and second transport areas.

[0046] The second transport groove section can be arranged in the circumferential direction around the longitudinal axis between two cutting elements, viewed along the longitudinal axis.

[0047] It may be expedient for the shaft section to have a web, in particular one extending helically along the longitudinal axis. In particular, the drilling section is designed and / or arranged on the shaft section such that a connecting region of the drilling section coincides with a connecting region of the shaft section and / or overlaps one another, in particular completely. The invention further relates to a method for producing a drilling tool according to one of the preceding claims, comprising the steps: - providing a lower punch for forming a drilling section of the drilling tool; - providing an upper punch for forming a drilling section of the drilling tool; - compressing the drilling section of the drilling tool along a pressing axis; - rotating the upper punch relative to the lower punch about the pressing axis.

[0048] It may be expedient for the drilling tool to have a suction opening extending along the longitudinal axis for generating an air flow and for sucking away particles.

[0049] By adding a suction opening along the longitudinal axis, the transport of particles, particularly the inlet and outlet, can be increased and clogging reduced. At the same time, the shaft section can be enlarged or reinforced.

[0050] It may be expedient for the drilling tool to have a cover element, in particular surrounding the shaft section, for covering the shaft section. The cover element can be arranged at a distance from the drilling section, in particular the drill head element. The cover element can be firmly connected to the shaft section, in particular by force-fit, form-fit, and / or material-fit. For example, a welded or soldered connection is possible. The cover element can be made of a different material than the shaft body element.

[0051] The drilling tool can have a shaft section groove. The cover element can form a shaft section groove in an area not surrounding the shaft body element. The cover element can not completely surround the shaft body element in a circumferential direction about the longitudinal axis. The shaft section groove can be delimited radially to the longitudinal axis by the shaft body element and in the circumferential direction to the longitudinal axis by the cover element. The shaft section groove can extend, in particular rectilinearly, along the longitudinal axis. The shaft section groove can be arranged on a side of the shaft section facing away from the suction opening. The shaft section groove can extend along the entire extent of the cover element. The shaft section groove can form a receiving and / or transport area for receiving and / or transporting away particles.The cover element can surround the shaft body element in a circumferential direction around the longitudinal axis by at least 90°, in particular by at least 150°, preferably by at least 180°, preferably by at least 210°, particularly preferably by at least 240°, further preferably by at least 270°. The cover element can surround the shaft body element in a circumferential direction around the longitudinal axis by at most 330°, in particular by at most 300°, preferably by at most 270°, preferably by at most 240°, particularly preferably by at most 210°, further preferably by at most 180°.

[0052] It may be expedient for the cover element to delimit the suction opening. The cover element may have a covering recess, in particular a parabolic one. The covering recess may be arranged in the

[0053] The suction opening can form a suction opening surface. The suction opening surface can be delimited by the shaft section and the cover element. The suction opening surface can be formed as a spanned surface. The suction opening surface can be arranged behind the drilling section, in particular the drill head element. The suction opening, in particular the suction opening surface, can have an angle of at least 20°, in particular at least 30°, preferably at least 40°, more preferably at least 50°, particularly preferably at least 60°, and / or of at most 80°, in particular at most 70°, preferably at most 60°, more preferably at most 50°, particularly preferably at most 40°, with respect to the longitudinal axis.

[0054] The suction opening can be arranged behind the drilling section, viewed along the longitudinal axis. The suction opening can begin in front of the second transport groove section and end after the second transport groove section, viewed in the circumferential direction around the longitudinal axis.

[0055] It may be expedient for the cover element to be arranged at a distance from the drilling section. This advantageously allows an exhaust air flow to be provided between the drill head element and the cover element. It may be expedient for the cover element to have a tapered end.

[0056] It may be expedient for the drilling tool to have a transport groove for transporting particles, in particular arranged on the shaft section, in particular on the shaft head element. In particular, the transport groove is delimited by the cover element, in particular transversely, preferably perpendicularly, to the longitudinal axis. The transport groove preferably extends, preferably rectilinearly, along the longitudinal axis. The transport groove can be covered, in particular partially, by the cover element, viewed along the longitudinal axis. The transport groove can have a first end, in particular facing the drilling section. The transport groove can have a second end, in particular facing away from the drilling section. The cover element can be arranged between the first end and the second end.

[0057] The cover element may have a protective extension extending along the longitudinal axis. The protective extension may be provided to cover and protect the shaft body element. The protective extension may be arranged between the ... and the ...

[0058] It may be expedient for the suction opening to be arranged on the shaft section, in particular on the transport groove, preferably the second transport groove section.

[0059] It may be expedient for the drilling tool to have an additional suction opening extending along the longitudinal axis for generating an air flow and for extracting particles. In particular, the additional suction opening is arranged on a side of the drilling tool facing away from the suction opening.

[0060] By providing suction openings on both sides of the cover element along the longitudinal axis, the transport of particles, particularly the inlet and outlet, through the transport groove can be increased and clogging reduced. At the same time, the transport groove can be made smaller, for example, to allow for an increase in the shaft section.

[0061] Short description of the drawings

[0062] Further advantages will become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0063] This shows:

[0064] Fig. 1 is a perspective view of a first embodiment of a

[0065] drilling tool,

[0066] Fig. 2 is a side view of a drilling section of a drilling tool not according to the invention,

[0067] Fig. 3 is a side view of another embodiment of a drilling section of a drilling tool,

[0068] Fig. 4 is a perspective view of a drilling tool,

[0069] Fig. 5 is a perspective view of a drilling tool,

[0070] Fig. 6 is a perspective view of a drilling tool according to the invention,

[0071] Fig. 7 is a perspective view of a part of the inventive

[0072] Drilling tool from Fig. 6,

[0073] Fig. 8 is a side view of a part of a drilling tool according to the invention and

[0074] Fig. 9 a section through the drilling tool from Fig. 8.

[0075] In the following figures, identical components are provided with the same reference numerals.

[0076] The invention is based on the object of improving a drilling tool 11, in particular a rock drilling tool 11, using simple design measures. This object is achieved with a drilling tool 11, in particular a rock drilling tool 11, having a drilling section 15, in particular comprising a hard metal, for machining a workpiece and having a shank section 17, in particular extending along a longitudinal axis A.

[0077] It is proposed that the drilling tool 11 has a transport recess 23 for transporting particles, in particular extending transversely to a longitudinal axis A.

[0078] In particular, the drilling tool 11 is designed as a rock drilling tool 11. In particular, the drilling tool 11 is designed for a cutting and / or a pushing working movement. During a cutting working movement, the drilling tool 11 has, in particular, a cutting element which is rotated or turned about a longitudinal axis A (axis of rotation) of the drilling tool 11. During a pushing working movement, the drilling tool 11 has, in particular, a pushing element, preferably a chisel element, which is moved along a longitudinal axis A. In particular, the cutting element and the pushing element are formed in one piece and are preferably arranged on a drilling section 15 of the drilling tool 11. The cutting element and / or the pushing element can form a drilling element 27.

[0079] In particular, the drilling section 15 is arranged at a first end of the drilling tool 11. The drilling section 15, in particular on the end face, is preferably provided for direct and / or indirect contact with a workpiece to be machined. The drilling section 15 is preferably formed substantially from a different material or material composition than the shaft section 17. The drilling section 15 is preferably formed substantially from a hard metal. Common hard metals or hard metal compositions such as tungsten carbide (cobalt) (WC-Co), titanium carbide, tantalum niobium carbide, zirconium carbide (ZrC), titanium nitride, etc., are known to those skilled in the art.

[0080] In particular, the shaft section 17 is arranged at a second end of the drilling tool, in particular one facing away from the first end. The drilling tool 11, in particular the shaft section 17, is preferably intended to be received by a handheld power tool, preferably a hammer drill or an impact drill. For this purpose, the drilling tool 11, in particular the shaft section 17, has a receiving area 19 at an end facing away from the drilling section 15. The receiving area 19 is preferably designed for coupling to a handheld power tool, such as a hammer drill. The drilling tool 11, in particular the receiving area 19, is preferably designed such that the drilling tool 11 can be coupled to a tool holder of the handheld power tool.Preferably, the drilling tool 11, in particular the receiving area 19 of the drilling tool 11, has a form-locking element designed as a groove, which forms at least part of an SDS-plus interface or an SDS-max interface.

[0081] In particular, the drilling section 15 is formed, in particular entirely, from a drilling head element 45. Alternatively, the drilling section 15 can be formed from a drilling plate element (not shown). Preferably, the shaft section 17 is formed, in particular entirely, from a shaft body element 17a. The drilling head element 45 preferably has a, in particular planar, connecting region which can be connected to a connecting region of the shaft body element 17a, in particular by means of a material-to-material connection. In particular, the drilling section 15 is connected to the shaft section 17, preferably in one piece, preferably by means of a welding process, welded or soldered by means of a soldering process. A welded connection is preferably a permanent connection of components using heat and / or pressure, with or without welding filler materials.

[0082] During machining, the drilling tool 11 penetrates the workpiece in the feed direction of the drilling tool 11. The feed direction of the drilling tool 11 runs coaxially to a longitudinal axis A of the drilling tool 11 and, starting from the shaft section 17, in the direction of the drilling section 15. In particular, the longitudinal axis A of the drilling tool 11 coincides, during operation of the drilling tool 11, in particular with a drilling or rotation axis of the drilling tool 11. In particular, the transport recess 23 extends perpendicular to a longitudinal axis A. In particular, the transport recess 23 is arranged, in particular completely, in the drilling section 15 and / or in the shaft section 17.

[0083] In particular, the transport recess 23 is provided for transporting particles, in particular drilling particles or rock particles. The transport recess 23 is preferably designed as a transport channel. The transport recess 23 is preferably designed for the passage of particles. The transport recess 23 is preferably provided for guiding an air flow, in particular a particle air flow, along the transport recess 23.

[0084] It may be expedient for the drilling section 15 to have a drilling element 27, in particular designed as a cutting element 27. In particular, the transport recess 23 is arranged between the drilling element 27 and the shaft section 17, viewed along the longitudinal axis A.

[0085] In particular, the drilling element 27 is designed as a cutting element and / or impact element. Preferably, the drilling element 27 is arranged on the end face of the drilling tool 11. Preferably, the drilling element 27 limits an extension of the drilling tool 11 along the longitudinal axis A. Preferably, the drilling element 27 is formed from a hard metal. In particular, the drilling element 27 extends from a longitudinal axis A or a rotational axis of the drilling tool 11 transversely to the longitudinal axis A, in particular up to a circumferential region 47 of the drilling tool 11. Preferably, the drilling element 27 is designed to be, in particular completely, rectilinear. Preferably, the drilling element 27 is designed to be, in particular completely, curved. Preferably, the drilling element 27 is designed to be partially rectilinear and / or partially curved. In particular, the drilling element 27 is designed to be, in particular strictly, monotonically decreasing, when viewed along the longitudinal axis A in the direction of the shaft section 17.

[0086] Further preferably, a plurality of drilling elements 27 are provided. In particular, the drilling section 15 has a further drilling element 27. Preferably, the further drilling element 27 is angled and / or spaced relative to the drilling element 27 in the circumferential direction about the longitudinal axis A. In particular, the drilling elements 27 open into the longitudinal axis A or rotational axis and form a drill tip 35 of the drilling tool 11.

[0087] It may be expedient for the transport recess 23 to be designed as a through-hole. In particular, the transport recess 23 designed as a through-hole extends through the entire drilling tool 11. The transport recess 23 preferably extends transversely, in particular perpendicularly, to the longitudinal axis A of the drilling tool 11. The transport recess 23 preferably extends from one side, in particular a circumferential side, to another side, in particular a further circumferential side, of the drilling tool 11. The transport recess 23 preferably extends in a straight line.

[0088] It may be expedient for the transport recess 23, viewed along the longitudinal axis A, to be delimited by the shaft portion 17, in particular the shaft body element. In particular, the transport recess 23, viewed along the longitudinal axis A, is delimited, in particular completely, by the drill head element 45. Preferably, the transport recess 23 is arranged in the drill portion 15.

[0089] It may be expedient for the transport recess 23 to be arranged on the drilling section 15 such that the longitudinal axis A intersects the transport recess 23. In particular, the transport recess 23 can be arranged below a drill bit 35 of the drilling tool 11, viewed along the longitudinal axis A. Preferably, the longitudinal axis A or the rotational axis can run through the drill bit 35. This minimizes weakening of the drilling tool 11 and maximizes force transmission to torsionally loaded sections.

[0090] It may be expedient for the drilling tool 11 to have an air inlet opening 41, 43 for providing an air flow to the transport recess 23. In particular, the air inlet opening 41 is arranged in the circumferential direction around the longitudinal axis A on the drilling tool 11, in particular on the drilling section 15. The air inlet opening 41 preferably extends substantially along the longitudinal axis A. The air inlet opening 41 is preferably arranged in the drilling section 15. The air inlet opening 41 is preferably delimited by the drill head element 45 and / or the shaft body element. The air inlet opening 41 is preferably closed. In particular, the air inlet opening 41 is surrounded on the circumferential region 47 in a plane of 360° by the drill head element 45 and / or the shaft body element.

[0091] The drilling tool 11 preferably has a further air inlet opening 41 for providing an air flow to the transport recess 23. In particular, the further air inlet opening 41 is arranged on a peripheral region 47 of the drilling tool 11 facing away from the air inlet opening 41.

[0092] It may be expedient for the drilling tool 11 to have an air outlet opening 47 for providing an air flow through the transport recess 23. In particular, the air outlet opening 47 is arranged transversely, in particular perpendicularly, to the air inlet opening 41. Preferably, the air outlet opening 47 is arranged on the shaft portion 17. Preferably, the air outlet opening 47 surrounds the longitudinal axis A of the drilling tool 11. Preferably, the air outlet opening 47 intersects the longitudinal axis A. More preferably, the air outlet opening 47 extends transversely, in particular perpendicularly, to the longitudinal axis A of the drilling tool 11. In particular, the air outlet opening 47 delimits the shaft portion 17 along the longitudinal axis A of the drilling tool 11.

[0093] It may be expedient for the drilling tool 11 to have a guide region 55 for guiding the drilling tool 11. In particular, the guide region 55 extends in the circumferential direction around the drilling section 15. In particular, the guide region 55 is arranged in the circumferential direction around the longitudinal axis A adjacent to the air inlet opening 41. Preferably, the guide region 55 is arranged on a circumferential region 47 of the drilling tool 11. Further preferably, the guide region 55 is designed to guide a rotational and / or a translational movement of the drilling tool 11. It may be expedient for the guide region 55 to delimit the drilling tool 11 transversely, in particular perpendicularly, to the longitudinal axis A of the drilling tool 11. Preferably, the guide region 55 forms a maximum radial distance from the longitudinal axis A or the axis of rotation of the drilling tool 11.The guide region 55 preferably extends along, in particular parallel, the longitudinal axis A of the drilling tool 11. The guide region 55 preferably limits an extension of the drilling section 15 along the longitudinal axis A.

[0094] Further preferably, the guide region 55 limits an extension of the drilling element 27, in particular transversely, preferably perpendicularly, to the longitudinal axis A of the drilling tool 11.

[0095] It may be expedient for the drilling tool 11 to have a further guide region 55 for guiding the drilling tool 11. In particular, the air inlet opening 41 is arranged in the circumferential direction between the two guide regions 55.

[0096] It may be expedient for the drilling tool 11 to have a further transport recess 25. In particular, the further transport recess 25 is arranged in the shaft section 17. Preferably, the further transport recess 25 borders on or extends into the transport recess 23. In particular, the further transport recess 25 extends along, in particular parallel to, the longitudinal axis A. In particular, the further transport recess 25 surrounds the longitudinal axis A, in particular completely. In particular, the further transport recess 25 is formed as a through-bore in the shaft section 17.

[0097] It may be expedient for the guide region 55 to be angled relative to a longitudinal axis A of the drilling tool 11. It may be expedient for the guide region 55 to be angled relative to the longitudinal axis A in such a way that friction in the circumferential direction is reduced. In particular, the guide region 55 has a longitudinal extension. Preferably, the guide region 55 extends along the longitudinal axis A. Preferably, the guide region 55 extends in the circumferential direction, in particular helically, around the longitudinal axis A. It may be expedient for the guide region 55, in particular a longitudinal extension of the guide region 55, to be angled against a rotational movement.

[0098] It may be expedient for the guide region 55 to have a guide edge 57. In particular, the guide edge 57 delimits the guide region 55, in particular in a circumferential direction around the longitudinal axis A. Preferably, the guide edge 57 extends helically around the drilling tool 11, in particular the drilling section 15 of the drilling tool 11. Preferably, the guide edge 57 has a curve with a constant and / or changing gradient around the drilling section 15 of the drilling tool 11.

[0099] It may be expedient for the drilling section 15 to have a drilling element 27, in particular designed as a cutting element, which is delimited transversely, in particular perpendicularly, to the longitudinal axis A by the guide region 55. In particular, the cutting element is delimited radially relative to the longitudinal axis A.

[0100] It may be expedient for the drilling element 27 to have a drilling edge defined by a boundary edge 61 positioned upstream in the direction of rotation and a boundary edge 63 positioned downstream, opposite to the direction of rotation. In particular, the downstream boundary edge 63 is larger than the upstream boundary edge 61, in particular by at least 200%, preferably by at least 250%, and preferably by at least 300%.

[0101] It may be expedient for the guide region 55 to be delimited along the longitudinal axis A on a side facing away from the shaft section 17 by an upper limiting edge 65 and on a side facing the shaft section 17 by a lower limiting edge 67. In particular, the extensions of the two edges (upper limiting edge 65 and lower limiting edge 67) overlap in the circumferential direction and along the longitudinal axis A, in particular by more than 20%, preferably by more than 40%, preferably by more than 60%, particularly preferably by more than 80%. It may be expedient for the drilling tool 11 to have a drilling tip 35, in particular a drilling tip 35, for machining a workpiece. In particular, a plane spanned along and perpendicular to the longitudinal axis A intersects the drilling tip 35, the upper limiting edge 65, and the lower limiting edge 67 of the guide region 55.

[0102] It may be expedient for the drilling tool 11 to have a transport groove 71 for transporting particles along the longitudinal axis A of the drilling section 15. In particular, the guide region 55, in particular the guide edge 57, delimits the transport groove 71 in the circumferential direction around the longitudinal axis A.

[0103] The drilling tool 11 has a transport groove arranged on the shaft body element for transporting particles. The transport groove 71 is delimited perpendicular to the longitudinal axis A by the cover element 75 and extends essentially rectilinearly along the longitudinal axis A. Viewed along the longitudinal axis A, it is partially covered by the cover element 75. The transport groove 71 has a first end facing the drilling section. The transport groove 71 has a second end facing away from the drilling section 45. The cover element 75 is arranged between the first end and the second end.

[0104] The transport groove 71 has a first transport groove section 72a. The first transport groove section 72a is arranged on the drill head element 45 and in the circumferential direction U between two cutting elements of the drill head element 45. The first transport groove section 72a has a curved transport groove surface 82, which extends from one cutting element to the next cutting element.

[0105] The second transport groove portion 72b is arranged on the shaft body element and adjoins the first transport groove portion 71a.

[0106] The second transport groove section 72b has a first transport region 73a, which, viewed in the radial direction, is set back from the first transport groove section 72a. The first transport region 73a has a minimal radial distance from the longitudinal axis A, which is parallel when viewed along the longitudinal axis A. The first transport region 73a has a constant extension in the circumferential direction U when viewed along the longitudinal axis A.

[0107] The second transport groove section 72b has a second transport region 73b and adjoins the first transport region 73a. The second transport region 73b is angled relative to the longitudinal axis A and has a minimal radial distance relative to the longitudinal axis A, which is angled when viewed along the longitudinal axis A. The second transport region 73b reduces the cross-section of the shaft body element in the radial direction. Viewed along the longitudinal axis A, the second transport region 73b has an extension that increases in the circumferential direction U in a direction facing away from the drilling section.

[0108] The second transport groove section 72b has a third transport region 73c with a minimal radial distance from the longitudinal axis A, which is parallel when viewed along the longitudinal axis L. The third transport region 73c and the cover element 75 form the suction opening 81. The third transport region 73c has a constant extension in the circumferential direction U when viewed along the longitudinal axis L.

[0109] The first transport region 72a adjoins the drilling section 45 on one side and the second transport region 72b on the other, and is arranged in particular between them. The second transport region 72b is arranged between the first transport region 72a and the second transport region 72b. The second transport groove section 72b is arranged between two cutting elements of the drill head element in the circumferential direction U around the longitudinal axis A, viewed along the longitudinal axis A.

[0110] It may be expedient for the shaft portion 17 to have a web, in particular extending helically along the longitudinal axis A. In particular, the drilling portion 15 is designed and / or arranged on the shaft portion 17 such that a connecting region of the drilling portion 15 coincides with a connecting region of the shaft portion 17 and / or overlaps one another, in particular completely.

[0111] The invention further relates to a method for producing a drilling tool 11 according to one of the preceding claims, comprising the steps of: - providing a lower punch for forming a drilling section 15 of the drilling tool 11; - providing an upper punch for forming a drilling section 15 of the drilling tool 11; - compressing the drilling section 15 of the drilling tool 11 along a pressing axis; - rotating the upper punch relative to the lower punch about the pressing axis.

[0112] It may be expedient for the drilling tool 11 to have a suction opening 81 extending along the longitudinal axis A for generating an air flow and for sucking out particles.

[0113] By providing a suction opening 81 extending along the longitudinal axis A, the transport of particles, particularly the inlet and outlet, can be increased and clogging reduced. At the same time, the shaft section 17 can be enlarged or reinforced.

[0114] It may be expedient for the drilling tool 11 to have a cover element 75, in particular surrounding the shaft section 17, for covering the shaft section 17.

[0115] The cover element 75 is arranged at a distance from the drill head element, viewed along the longitudinal axis A. The cover element is integrally connected to the shaft section by means of a soldered joint. The cover element is made of a different material than the shaft body element.

[0116] The drilling tool has a shaft section groove and forms a shaft section groove in an area not surrounding the shaft body element, whereby the cover element does not completely surround the shaft body element in a circumferential direction around the longitudinal axis. The shaft section groove is delimited radially to the longitudinal axis by the shaft body element and in the circumferential direction to the longitudinal axis by the cover element. The shaft section groove extends rectilinearly along the longitudinal axis. The shaft section groove is arranged on a side of the shaft section facing away from the suction opening and extends along the entire extent of the cover element. The shaft section groove forms a receiving and / or transport area for receiving and / or transporting away particles. The cover element 75 surrounds the shaft body element in a circumferential direction U around the longitudinal axis A by at least 270° and by a maximum of 330°.

[0117] It may be expedient for the cover element 75 to delimit the suction opening 81. The cover element 75 has a cover recess, in particular a parabolic one, which delimits the suction opening 81.

[0118] The suction opening 81 forms a suction opening surface 82 and is delimited by the shaft body element and the cover element 75. The suction opening surface 82 is formed as a spanned surface and is arranged behind the drill head element. The suction opening surface 82 has an angle a of at least 30° and at most 40° with respect to the longitudinal axis A.

[0119] The suction opening 81 is arranged behind the drilling section when viewed along the longitudinal axis and begins in the circumferential direction U around the longitudinal axis in front of the second transport groove section and ends after the second transport groove section.

[0120] The cover element has a protective extension 84 extending along the longitudinal axis A, which is intended to cover and protect the shaft body element.

[0121] The suction opening 81 is arranged on the second transport groove section.

[0122] It may be expedient for the cover element 75 to be arranged adjacent to and at a distance from the drilling section 15.

[0123] It may be expedient for the cover element 75 to have a tapered end. It may be expedient for the drilling tool 11 to have a transport groove 71b, arranged in particular on the shaft portion 17, for transporting particles. In particular, the transport groove 71b is delimited by the cover element 75, in particular transversely, preferably perpendicularly, to the longitudinal axis A. Preferably, the transport groove 71b extends, preferably rectilinearly, along the longitudinal axis A.

[0124] It may be expedient for the drilling tool 11 to have a further suction opening 81 extending along the longitudinal axis A for generating an air flow and for sucking out particles. In particular, the further suction opening 81 is arranged on a side of the drilling tool 11 facing away from the suction opening 81.

[0125] By providing suction openings 81 on both sides of the cover element 75 along the longitudinal axis A, the transport, particularly the inlet and outlet, of particles through the transport groove 71b can be increased and clogging reduced. At the same time, the transport groove 71b can be made smaller, for example, to enlarge the shaft section 17.

Claims

Claims 1 . Drilling tool, in particular rock drilling tool (11), with a drilling section (15), in particular comprising a hard metal, for machining a workpiece and with a shaft section (17), in particular a shaft body element, extending in particular along a longitudinal axis (A), characterized by a guide region (55) for guiding the drilling tool (11), wherein the guide region (55) is angled with respect to a longitudinal axis (A) of the drilling tool (11).

2. Drilling tool according to one of the preceding claims, characterized in that the guide region (55) is angled relative to the longitudinal axis (A) in such a way that friction in the circumferential direction is reduced and / or that the guide region (55), in particular a longitudinal extension of the guide region (55), is angled against a rotational movement and / or that the guide region (55) delimits the drilling tool (11) transversely, in particular perpendicularly, to the longitudinal axis (A) of the drilling tool (11) 3. Drilling tool according to one of the preceding claims, characterized in that the guide region (55) has a guide edge (57) which delimits the guide region (55), in particular in a circumferential direction around the longitudinal axis (A), wherein the guide edge (57) extends helically around the drilling tool (11), in particular the drilling section (15) of the drilling tool (11).

4. Drilling tool according to one of the preceding claims, characterized in that the drilling section (15) has a drilling element (27), in particular designed as a cutting element, which is delimited by the guide region (55) radially relative to the longitudinal axis (A).

5. Drilling tool according to one of the preceding claims, characterized in that the drilling element (27) has a drilling edge which is delimited by a boundary edge (61) arranged upstream in the direction of rotation and a boundary edge (63) arranged downstream counter to the direction of rotation, wherein the downstream boundary edge (63) is larger than the upstream boundary edge (61), in particular by at least 200%, preferably by at least 250%, preferably by at least 300%.

6. Drilling tool according to one of the preceding claims, characterized in that the guide region (55) is delimited along the longitudinal axis (A) on a side facing away from the shaft section (17) by an upper limiting edge (65) and on a side facing the shaft section (17) by the lower limiting edge (67), wherein the extensions of the two edges viewed in the circumferential direction and along the longitudinal axis A overlap, in particular by more than 20%, preferably by more than 40%, preferably by more than 60%, particularly preferably by more than 80%.

7. Drilling tool according to one of the preceding claims, characterized by a drill bit (35), in particular a drill bit (35) for machining a workpiece, wherein a plane spanned along and perpendicular to the longitudinal axis (A) intersects the drill bit (35), the upper limiting edge (65) and the lower limiting edge (67) of the guide region (55).

8. Drilling tool according to one of the preceding claims, characterized in that the guide region (55) has a guide edge (57) which is arranged between the upper limiting edge (65) and the lower limiting edge (67) and in particular connects them.

9. Drilling tool according to one of the preceding claims, characterized by a transport groove (71) for transporting particles along the longitudinal axis A of the drilling section (15), wherein the guide region (55), in particular the guide edge (57), delimits the transport groove (71) in the circumferential direction around the longitudinal axis (A).

10. Drilling tool according to one of the preceding claims, characterized in that the shaft section (17) has a, in particular helically extending along the longitudinal axis (A), wherein the drilling section (15) is designed and / or arranged on the shaft section (17) in such a way that a connecting region of the drilling section (15) corresponds to a connecting region of the shaft section (17) and / or overlaps one another, in particular completely.

11. Drilling tool according to the preamble of claim 1, characterized by a suction opening (81) extending along the longitudinal axis (A) for generating an air flow and for sucking out particles.

12. Drilling tool according to one of the preceding claims, characterized by a cover element (75), in particular surrounding the shaft body element, for covering the shaft body element.

13. Drilling tool according to one of the preceding claims, characterized by a transport groove (71) for transporting particles, in particular arranged on the shaft section (17) and / or formed by the shaft body element and the cover element (75), wherein the transport groove (71) is delimited by the cover element (75), in particular transversely to the longitudinal axis (A).

14. Drilling tool according to one of the preceding claims, characterized in that the suction opening (81) forms a suction opening surface (82) which is delimited in particular by the shaft section (17) and the cover element (75) and / or is arranged behind the drilling section, in particular the drill head element, and / or has an angle of at least 20°, in particular at least 30°, preferably at least 40°, preferably at least 50°, particularly preferably at least 60°, and / or of at most 80°, in particular at most 70°, preferably at most 60°, preferably at most 50°, particularly preferably at most 40°, relative to the longitudinal axis.

15. A method for producing a drilling tool (11) according to any one of the preceding claims, comprising the steps: - Providing a lower punch for forming a drill section (15) the drilling tool (11); - providing an upper punch for forming a drilling section (15) of the drilling tool (11); - compressing the drilling section (15) of the drilling tool (11) along a pressing axis; - Rotating the upper punch relative to the lower punch around the press axis.

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