Machine reaming tool, cutting tool and base body for receiving cutting tool

Abstract

The present invention discloses a machine reaming tool, a cutting tool and a base body for receiving the cutting tool. Specifically disclosed is a machine reaming tool (1), which comprises a base body (2), the base body having a plurality of tool receivers (24), the plurality of tool receivers having cutting tools (3) inserted therein. Herein, the cutting tools (3) are inserted into the tool receivers (24), each of which forms a linear guide of the cutting tool (3) along a direction orthogonal to the rotation axis of the machine reaming tool (1). The linear guide is a prismatic sliding guide, in particular a dovetail guide. In particular, the dovetail guide is designed asymmetrically.

Description

Technical Field

[0001] The invention relates to the field of reaming tools for producing holes in different materials, in particular metals, plastics, fiber composite materials, etc. In particular, the invention relates to a machine reaming tool, a cutting tool and a basic body for receiving the cutting tool according to the preambles of the corresponding independent patent claims. Background Art

[0002] Machine reaming tools or machine reamer are used to finish cylindrical holes in metal parts by so-called "reaming". In this context, the surface quality as well as the shape and dimensional accuracy, roundness and cylindricity are improved. First, a hole is created which is a few tenths of a millimeter smaller than the nominal size (maximum 0.1-0.2 mm). Subsequently, the hole is brought to the nominal size with the aid of the reaming tool. In this way, smaller tolerances can be produced. In the usual case, the dimensional tolerances that can be achieved are IT7. In special cases, IT6 or even IT5 are also possible.

[0003] The individual cutting edges of the reaming tool each include a main cutting edge or front cut portion and a secondary cutting edge or guide portion. The front cut portion performs the material removal work and the guide portion serves to guide the tool in the hole. In order to ensure reliable guidance under all machining conditions, for example in the case of an oblique withdrawal from the hole, the guide portion is a multiple of the length of the front cut portion in the axial direction. Thus, given a diameter of, for example, about 15 mm, the length of the guide portion is 10 mm or more. In the case of a straight groove milling cutter (tool), the guide portion extends parallel to the axis of rotation of the tool. In the case of a spiral groove milling cutter, the guide portion extends obliquely to the axis of rotation of the tool.

[0004] It is known to equip a basic body with replaceable carbide cutting bodies by clamping, brazing or screwing the cutting body into a holder of the basic body and subsequently grinding the cutting surface of the cutting body to the desired diameter size. However, this is cumbersome because this process must be carried out in each case starting from a certain desired size. If the cutting body is removed from the basic body and a new cutting body is attached, they usually have to be inserted again at exactly the same position or have to be reground.

[0005] US 2 517 970 shows a reaming tool with replaceable blades. These blades are each inserted into the shank via a radially extending sliding guide with an inclined groove. It is not envisaged that the tool can be set to different diameters.

[0006] DE 10 2007 007399 A1 shows a machine reamer having a tool holder and a cutter block which is movably guided in the tool holder transversely to its longitudinal axis. In this way, the cutting element together with the cutter block can perform an oscillating movement about the longitudinal axis in order to compensate for the offset between the hole and the tool.

[0007] GB 172 796 shows a reaming tool with radially adjustable cutting elements. Each cutting element is guided in a radially extending slot. The cutting elements are usually radially displaced by a cone and set to a diameter. The guidance accuracy in the slot is limited by the inherent design. Summary of the invention

[0008] A possible object of the present invention is to provide a machine reaming tool, a cutting tool and a basic body for receiving a cutting tool of the initially mentioned type, each of which overcomes the above-mentioned disadvantages.

[0009] Further possible objects of the present invention are to provide a machine reaming tool, a cutting tool and a matrix for receiving a cutting tool, each of which allows the cutting tool to be accurately and adjustably retained in the matrix.

[0010] Further possible objects are to provide a machine reaming tool, a cutting tool and a basic body for receiving a cutting tool, each of which allows for rapid provision of reaming tools for predefined dimensions.

[0011] At least one of these objects is achieved by a machine reaming tool, a cutting tool and a basic body for receiving a cutting tool, each having the features of the respective independent patent claim.

[0012] The machine reaming tool comprises a base body having a plurality of tool receivers having cutting tools inserted therein. Herein, the cutting tools are inserted into the tool receivers, each of which forms a linear guide (or straight guide) of the cutting tool in a direction orthogonal to the axis of rotation of the machine reaming tool.

[0013] In an embodiment, the cutting tools are each positionable and fixable in a selectable position along a respective linear guide, in particular by means of a clamping body.With this, the radial position of the cutting tools can be set and / or adjusted.

[0014] In this way, it is possible to position and fix the cutting tool in a defined position along the linear guide without having to grind the cutting tool afterwards.

[0015] In an embodiment, the central longitudinal axis of the linear guide (particularly the axis along which the cutting edge is displaced when displacing the cutting tool) intersects the axis of rotation of the machine reaming tool. In other embodiments, this is not the case.

[0016] In an embodiment, the linear guide is a prismatic sliding guide. In particular, it can be a dovetail guide, wherein the cutting tool comprises a dovetail section having a first guide surface and a second guide surface, which interact with a first receiving surface and a second receiving surface of the base body to define the dovetail guide.

[0017] In this way, precise guidance of the cutting tool in the basic body is possible.

[0018] In an embodiment, the linear guide is a cylindrical sliding guide.Herein, the basic body can comprise a rotating cylindrical receiver having an inner surface, and the cutting tool can be designed as a prism, wherein in the assembled state of the cutting tool the two edges of the prism bear on the inner surface.

[0019] In an embodiment, the dovetail guide is asymmetrically designed, in particular by virtue of the angle between the first guide surface relative to a reference plane extending orthogonal to the rotation axis of the machine reaming tool being different from the angle between the second guide surface and the reference plane, in particular differing by at least 3° or at least 5°.

[0020] In this way, it is possible to at least partially compensate for the asymmetry of forces which are generated when the cutting tool is clamped only on one side of the cutting tool. In turn, in this way, the contact accuracy of the cutting tool on the basic body is improved.

[0021] In an embodiment, the angle between the first guide surface and the reference plane is 65°, and the angle between the second guide surface and the reference plane is 70°.

[0022] In an embodiment, the situation is:

[0023] • the machine reaming tool comprises a clamping body which interacts with the second receiving surface and exerts therein a force pressing the first guide surface against the first receiving surface,

[0024] • and in particular, this force also presses the first reference surface and the second reference surface of the cutting tool against the reference surface of the basic body,

[0025] • Wherein, in particular, these reference surfaces are orthogonal to the axis of rotation of the machine reaming tool.

[0026] In this way, it becomes possible to press two reference surfaces of the cutting tool, which are opposite to each other with respect to the dovetail section, against corresponding reference surfaces of the basic body by means of a single clamping element.

[0027] In an embodiment, it is the case that when the machine reaming tool is in use, the clamping body and the second receiving surface lead relative to the cutting tool as seen in the direction of rotation.

[0028] In this way, it becomes possible that the machining forces acting on the cutting tool in the direction opposite to the rotation are mainly transmitted to the first receiving surface via the first guide surface. In this way, a larger plane surface for force transmission is obtained than the second receiving surface, which is interrupted by the section where the clamping body is located.

[0029] In some embodiments, the machine reaming tool includes a clamping nut that interacts with a threaded section of a clamping body to apply a force that presses the first receiving surface against the first guide surface, wherein the clamping nut includes a conical section and wherein this conical section is arranged in a conical seat of the base.

[0030] In this way, it is possible to ensure the mechanical strength of the basic body in the region of the tool receiver without having to increase the thickness of the basic body in the axial direction.

[0031] In other embodiments, the clamping nut includes a linear contact surface on a planar seat in the base.

[0032] In an embodiment, the tool receivers each comprise a stop unit which effects an adjustable limitation of a movement of a cutting tool inserted into the tool receiver in the direction of the linear guide.

[0033] In an embodiment, the stop unit comprises an adjusting screw which is adjustable in the direction of the linear guide.

[0034] In an embodiment, the adjusting screw allows adjusting the position of the cutting tool within a range of up to ten millimeters, in particular up to six millimeters.

[0035] In this way, it is possible to set and / or adjust the radial position of the respective cutting tool.

[0036] In an embodiment, the outer diameter of the base body is between 120 and 300 millimeters.

[0037] In an embodiment, the machine reaming tool comprises six to twenty, in particular twelve to eighteen, cutting tools, which are distributed along the periphery of the basic body.

[0038] In this way, it is possible to cover a wide range of diameters with a single set of cutting tools. The cutting tools can be manufactured and ground in a precise manner. For an application with a certain cutting size, the cutting tool can be inserted into a matrix with the corresponding diameter and the cutting size set.

[0039] A cutting tool is provided for use in a machine reaming tool and includes a cutting edge for reaming a workpiece and a dovetail section for linearly guiding the cutting tool via a dovetail guide.

[0040] The cutting edge generally includes a front cutting portion and a guide portion. The front cutting portion is used for material removal processing of the workpiece; the guide portion is used for guiding the workpiece.

[0041] In an embodiment, the dovetail section is designed asymmetrically.

[0042] In an embodiment, the dovetail segment is designed asymmetrically in the following manner:

[0043] • the cutting tool extends in the guide direction and is provided for insertion into the tool receiver in the guide direction,

[0044] • the dovetail segment comprises two reference surfaces which are arranged on opposite sides of the dovetail segment (and therefore also of the cutting tool) and lie in a common reference plane;

[0045] • the dovetail section comprises a first guide surface and a second guide surface,

[0046] • these reference surface, the first guide surface and the second guide surface extend parallel to the guiding direction,

[0047] • the first guide surface and a first of the reference surfaces form a first guide angle in a region outside the cutting tool,

[0048] • the second guide surface and a second of these reference surfaces form a second guide angle in a region outside the cutting tool,

[0049] • wherein the first guide angle and the second guide angle are acute angles and are different, in particular differ by at least 3° or at least 5°.

[0050] By means of these reference surfaces, the first guide surface and the second guide surface extend parallel to the guide direction, along which they form a guide for the cutting tool. In other words, these reference surfaces, the first guide surface and the second guide surface each form a limitation to the movement of the cutting tool in a respective direction orthogonal to the guide direction. When the cutting tool is inserted into the tool receiver (neglecting the small clearance necessary for the sliding seat), these surfaces together do not allow a movement of the cutting tool in a direction orthogonal to the guide direction. They therefore limit its movement to a linear movement along the guide direction.

[0051] In an embodiment, the leading of the two lead angles is the larger lead angle relative to the cutting direction (or working direction) of the cutting edge.

[0052] In an embodiment, the first acute angle is 65° and the second acute angle is 70°.

[0053] The cutting edge (with the rake portion and the guide portion) extends in a cutting direction, and the reference surfaces form a stop for the cutting tool in a direction extending substantially parallel to the cutting direction.

[0054] The cutting tool is provided for movement in the moment direction. When the cutting tool is assembled in a corresponding annular body, the movement direction extends in a plane perpendicular to the axis of rotation of the annular body. The cutting direction is perpendicular to the movement direction or inclined to the normal to the movement direction, wherein the angle to the normal is, for example, less than ±30°, in particular between 5° and 25° in both directions.

[0055] In an embodiment, the length of the cutting tool is between 12 and 50 mm and the length of the tool receiver is between 8 and 49 mm.

[0056] In an embodiment, the length of the cutting tool is between 15 and 40 mm and the length of the tool receiver is between 10 and 39 mm.

[0057] In an embodiment, the length of the cutting tool is between 20 and 30 mm, and the length of the tool receiver is between 15 and 29 mm.

[0058] In an embodiment, the height of the cutting tool, ie its extension in a direction perpendicular to the direction of movement, is between 20 and 30 mm, in particular between 4 and 20 mm, in particular between 6 and 15 mm.

[0059] The basic body is for use in a machine reaming tool. It comprises tool receivers, each of which forms a linear guide for receiving a cutting tool in a direction orthogonal to the axis of rotation of the machine reaming tool.

[0060] According to an aspect of the invention, the base body comprises a coolant feed, wherein the coolant is guided through the nozzle body, wherein the nozzle body is a rotationally symmetrical part with respect to the axis of rotation, which has a recess extending in the circumferential direction around the nozzle body. This aspect of the base body with the nozzle body can be realized in combination with the linear guides already described above or independently of these linear guides.

[0061] Such a base body comprises several coolant feed members, each of which is assigned to a tool receiver, wherein a coolant feed member is guided through the base body to the nozzle receiver, the injection channel is guided from the nozzle receiver in the direction of the assigned tool receiver, and a nozzle body is inserted into the nozzle receiver, the nozzle body comprising a recess extending around the nozzle body in a circumferential direction, and the circumferential side (flank) of the recess defines the jet direction of the coolant jet fed by the coolant feed member.

[0062] Herein, in a cross-sectional view along a plane including the axis of rotation, the outer side of the recess can have an angle or side angle relative to the axis of rotation, which defines the jet direction of the coolant. The angle of the coolant jet relative to the axis of rotation of the nozzle body can be defined by the side of the recess and therefore also by the angle of the coolant jet relative to the tangential surface on the periphery of the base body. If the cutting diameter is changed by adjusting the cutting tool, the coolant jet can be adjusted by replacing the nozzle body. These nozzle bodies can be manufactured as turned parts in a simple and inexpensive manner due to their rotationally symmetrical shape.

[0063] In an embodiment, there is a base body together with several groups of nozzle bodies, wherein the groups of nozzle bodies have different side angles. That is, all nozzle bodies of each group have the same side angle.

[0064] A method for providing a predefined cutting size to a machine reaming tool comprises the following steps:

[0065] • Grinding a set of cutting tools to a reference diameter, for example to 140 mm;

[0066] • selecting a substrate from a series of substrates having different diameters according to a predefined cutting dimension, wherein the cutting dimension is different from a reference diameter;

[0067] • Inserting the ground cutting tool into the basic body and adjusting the position of the cutting tool in the corresponding tool receiver according to the cutting size, in particular by means of a stop unit of the corresponding tool receiver.

[0068] The cutting size corresponds to the diameter achieved by the hole machined with the machine reaming tool. With this, it is possible on the one hand to manufacture sets of cutting tools in large piece numbers and with high accuracy and on the other hand to adapt a set of cutting tools to the desired cutting size with little effort.

[0069] Further preferred embodiments will emerge from the dependent patent claims.Herein, features of the method claims can where appropriate be combined with features of the device claims and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In the following, the subject matter of the invention is explained in more detail by means of a preferred embodiment example represented in the accompanying drawings. Here it is schematically shown:

[0071] Figure 1-3 It is a machine reaming tool in different views;

[0072] Figure 4-5 It is a cutting tool;

[0073] Figure 6 is a section through the cutting tool in the annulus;

[0074] Figure 7 is a clamping body;

[0075] Figure 8-9 It is the clamping nut;

[0076] Fig.10 is a section through a receiver for a cutting tool;

[0077] Fig.11 is the corresponding view;

[0078] Figure 12-13 is a nozzle body; and

[0079] Figure 14-19 It is a variation of the nozzle body.

[0080] Basically, identical parts or parts having the same action are provided with the same reference symbols in the figures. DETAILED DESCRIPTION

[0081] Figure 1-3A machine reaming tool 1 is shown in different views. The machine reaming tool 1 comprises an annular base body 2, into which cutting tools 3 are inserted in a manner distributed around the periphery. Usually, the distribution is not completely uniform, in order to avoid vibrations of the tool. Each cutting tool 3 is inserted into a tool receiver 24, and these form a linear guide or straight guide for linear displacement of the cutting tool 3 relative to the tool receiver 24. In particular, the guide is a dovetail-shaped guidance, which can also be expressed as a closed prismatic sliding guide.

[0082] The cutting tools 3 each comprise a cutting edge 36 having a relatively short rake portion and a longer leading portion.

[0083] The basic body 2 is rotationally symmetrical with respect to an axis of rotation and is intended to be assembled on a machine tool for rotation about this axis of rotation. The tool receiver 24 and the cutting tool 3 are oriented so that when the cutting tool 3 is displaced in the guide, the cutting edge 36 is displaced in a radial direction relative to the machine reaming tool 1 and thus along a line leading through the axis of rotation of the machine reaming tool 1.

[0084] The axial surface of the basic body 2 serves as a reference surface 23 for positioning the cutting tool 3 in the axial direction. To this end, the reference surface 23 can be ground in a planar manner according to the required accuracy.

[0085] An adjusting screw 25 is assigned to each cutting tool 3, which limits the position of the cutting tool 3 to the inside in the radial direction relative to the basic body 2 or in the longitudinal direction relative to the cutting tool 3. The adjusting screw 25 extends in the radial direction and can be adjusted from the inside of the basic body 2 through an opening in its cylindrical inner surface.

[0086] Assigned to each cutting tool 3 is a coolant feed which guides the coolant through the nozzle body 5 and the injection channel 28 to the respective cutting edge 36 .

[0087] Figure 4-5A cutting tool 3 with parts related to guidance is shown. For simplicity, the cutting edge 36 is not shown. The cutting tool 3 includes a dovetail section 34 having surfaces related to a dovetail guidance as a prismatic sliding guide. These are a first guide surface 31 and a second guide surface 32, the first guide surface merging into a first reference surface 33a, the second guide surface merging into a second reference surface 33b. All these surfaces are planar and each extend parallel to the longitudinal axis of the cutting tool 3. The longitudinal axis is parallel to the guiding direction or coincides with the guiding direction. An acute angle (hereinafter also referred to as a guiding angle) is located between the guiding surface and the corresponding reference surface - outside the cutting tool. A recess 35 is arranged on one side of the dovetail section 34.

[0088] Figure 6 A section through the cutting tool 3 in the annular body 2 is shown. In the assembled state of the cutting tool 3 in the basic body 2, the following geometrical relationships or definitions apply:

[0089] • the reference surface 23 of the basic body 2 and the reference surfaces 33a, 33b of the cutting tool 3 bear on each other and lie in a common reference plane;

[0090] • the first receiving surface 21 and the first guide surface 31 bear on each other and lie in a first reference plane. The angle between the first guide plane and the reference plane is denoted as first guide angle hereinafter;

[0091] • The second receiving surface 22 and the second guide surface 32 bear on each other and lie in a second guide plane. The angle between the second guide plane and the reference plane is denoted as second guide angle hereinafter.

[0092] The reference plane is perpendicular to the rotation axis. The first guide plane and the second guide plane each form an angle (guide angle) with the reference plane. In an embodiment, the angle is between 45° and 85°, in particular between 50° and 80°, in particular between 55° and 75°.

[0093] In addition to the cutting tool 3, there is also a clamping body 4; see also Figure 7 , which has a clamping section 41 pressed against the second guide surface 32. The corresponding force is mustered by a clamping nut 43 which is screwed to the threaded section 42 of the clamping body 4. See also Figure 8 and Fig. 9, the clamping nut 43 comprises a conical section 44 which is arranged in the conical receiver or conical seat 29 of the basic body 2. The conical shape of the clamping nut 43 allows, on the one hand, the threaded section between the clamping nut 43 and the clamping body 4 to be designed long enough to achieve the necessary clamping force and, on the other hand, allows the basic body 2 not to be weakened too much in the area of ​​the tool receiver 24. The cone angle in the conical section 44 is, for example, 45°.

[0094] The clamping nut 43 pulls the clamping body 4 in the axial direction of the base body 2, and since the second guide surface 32 and the clamping section 41 are planes and supported on each other and are located in a plane extending inclined to the axial direction according to the second guide angle, the clamping section 41 exerts a clamping force on the cutting tool 3, and the clamping force has an axial component and a component in the peripheral direction relative to the base body 2 or orthogonal to the guiding direction of the cutting tool 3.

[0095] The clamping force causes the first reference surface 33a and the second reference surface 33b of the cutting tool 3 to be pressed against the reference surface 23 of the basic body 2, and the first guide surface 31 to be pressed against the first receiving surface 21. With this, the position of the cutting tool 3 in the basic body 2 is defined with respect to five degrees of freedom. The sixth degree of freedom corresponds to the displaceability in the guiding direction.

[0096] Figure 6 Further shown is a threaded pin 6 which is inserted into the basic body 2, in particular screwed therein, and overlaps the cross section of the cutting tool 3 in the region of the recess 35. The recess 35 is elongated so that the cutting tool 3 can be displaced in the guide direction without affecting the threaded pin 6. The threaded pin 6 serves as a loss protection or a securing element against being thrown away in the event that the clamping force should be relieved.

[0097] Fig.10 shows a section through a tool receiver 24 for a cutting tool, and Fig.11A corresponding view on a detail of the base body 2 in the region of the tool receiver 24 is shown. Only the base body 2 is represented. Here, the inclination angles of the first receiving surface 21 and the second receiving surface 22 are not of the same magnitude. In particular, the first guide angle is 65° and the second guide angle is 70°. By making the second guide angle greater than the first guide angle, the pressure on the second reference surface 33b and the pressure on the first reference surface 33a can be close to each other. If the angles are equal, the pressure on the first reference surface 33a is generally smaller due to the geometry of the guide and due to the friction between the clamping section 41 of the clamping body 4 and the second guide surface 32. By the second guide angle, the angle at which the clamping body 4 engages is enlarged relative to the first guide angle, and the pressure between the first reference surface 33a and the reference surface 23 of the base body 2 increases.

[0098] By making the two pressing forces on the two reference surfaces 33 close to each other, the contact accuracy of the cutting tool 3 on the reference surface 23 is improved.

[0099] Figure 12-13 The nozzle body 5 is shown. The nozzle body is inserted into the nozzle receiver 27 of the base body 2 (see Fig.11 It can be screwed by screw 53 (see Figure 3 ) is fastened in the basic body. The nozzle body 5 comprises a circumferential recess 51. The nozzle receiver 27 comprises a recess through which the coolant flows from the coolant feed 26 from the interior of the basic body 2 into the recess 51. The coolant can only leave the recess 51 in the region of the injection channel 51. The injection channel 28 is a recess or a recess in the basic body 2, which represents the opening of the cavity formed by the recess 51. The opening is aligned to the cutting edge 36. Relative to the axis of symmetry of the nozzle body 5, the injection channel 28 defines the direction of the coolant jet along the periphery of the nozzle body 5. The side angle 52 of the side of the recess 51 defines the angle between the coolant jet and the axis of symmetry.

[0100] If the position of the cutting edge 36 is adjusted by displacing the cutting tool 3, the coolant jet can be set to a new length by replacing the nozzle body 5 with a nozzle body 5 having a different flank angle 52. Since the nozzle bodies 5 are designed as rotationally symmetrical parts, they are simple and inexpensive to manufacture. With this, it is possible to adapt the coolant feed inexpensively to the adjustable position of the cutting tool 3.

[0101] As an alignment deviation of the flank from a tangent plane to the periphery of the base body 2 at the location of the nozzle body 5 , the flank angle 52 is, for example, between 1° and 45°, in particular between 5° and 35°, in particular between 10° and 30°.

[0102] Figure 14-19A variant of the nozzle body 5 is shown in the various figures and in the assembled state in different views and sections. In contrast to the nozzle body 5 of the previous figures, which is fastened by means of a screw 53, this nozzle body 5 itself comprises a threaded section 54, by means of which the nozzle body 5 is screwed into a corresponding internal thread of the base body 2. This internal thread is interrupted by at least one recess 55, which extends parallel to the axis of the thread and forms a channel for feeding coolant to the recess 51. Alternatively (not shown) or in addition, the threaded section 54 can include a recess in the axial direction to the coolant feed.

Claims

1. A machine reaming tool (1) comprising a base body (2) having a plurality of tool receivers (24) having cutting tools (3) inserted therein; in, The cutting tool (3) is inserted into a tool receiver (24), each of which forms a prismatic sliding guide in a direction orthogonal to the rotation axis of the machine reaming tool (1) to serve as a linear guide for the cutting tool (3). Characterized in that the linear guide is a prismatic sliding guide in the form of a dovetail guide, wherein the cutting tool (3) comprises a dovetail section (34) having a first guide surface (31) and a second guide surface (32), which interact with a first receiving surface (21) and a second receiving surface (22) of the base body (2) to define the dovetail guide, and wherein the machine reaming tool (1) comprises a clamping body (4) which interacts with the second guide surface (32) and exerts a force therein which presses the first guide surface (31) against the first receiving surface (21), Wherein, the dovetail segment (34) includes a first reference surface (33a) and a second reference surface (33b), and the first reference surface (33a) and the second reference surface (33b) are arranged on opposite sides of the dovetail segment (34), wherein the force pressing the first guide surface (31) against the first receiving surface (21) also presses the first reference surface (33a) and the second reference surface (33b) of the cutting tool (3) against the reference surface (23) of the base body (2), wherein the first reference surface (33a), the second reference surface (33b) and the reference surface (23) of the base body (2) are orthogonal to the rotation axis of the machine reaming tool (1).

2. The machine reaming tool (1) according to claim 1, wherein: The dovetail guide is designed asymmetrically.

3. The machine reaming tool (1) according to claim 2, wherein: The dovetail guide is asymmetrically designed by the angle between the first guide surface (31) and a reference plane extending orthogonal to the rotation axis of the machine reaming tool (1), which angle is different from the angle between the second guide surface (32) and the reference plane, and differs by at least 3° or at least 5°.

4. The machine reaming tool (1) according to claim 3, wherein: The angle between the first guide surface (31) and the reference plane is 65°, and the angle between the second guide surface (32) and the reference plane is 70°.

5. The machine reaming tool (1) according to claim 4, wherein: When the machine reaming tool (1) is in use, the clamping body (4) and the second receiving surface (22) lead relative to the cutting tool (3) as seen in the rotation direction of the machine reaming tool (1).

6. A machine reaming tool (1) according to claim 1 or 5, having a clamping nut (43), which interacts with the threaded section (42) of the clamping body (4) to apply a force pressing the first receiving surface (21) against the first guide surface (31), wherein The clamping nut (43) comprises a conical section (44), wherein the conical section (44) is arranged in a conical seat (29) of the base body (2).

7. The machine reaming tool (1) according to any one of claims 1 to 5, wherein: The tool receivers (24) each comprise a stop unit which enables an adjustable limitation of the movement of the cutting tool (3) inserted into the tool receiver (24) in the direction of the linear guide.

8. The machine reaming tool (1) according to claim 7, wherein: The stop unit comprises an adjusting screw (25) which can be adjusted in the direction of the linear guide. Therein, the adjustment screw (25) allows the position of the cutting tool (3) to be adjusted within a range of up to ten millimeters.

9. The machine reaming tool (1) according to claim 8, wherein: The adjustment screw (25) allows the position of the cutting tool (3) to be adjusted within a range of up to six millimeters.

10. The machine reaming tool (1) according to any one of claims 1 to 5, wherein: The outer diameter of the base body (2) is between 120 and 300 mm.

11. A cutting tool for use in a machine reaming tool (1) according to any one of the preceding claims, the cutting tool comprising a cutting edge (36) for reaming a workpiece, characterised in that The cutting tool comprises a dovetail section (34) for linearly guiding the cutting tool (3) via a dovetail guide, The dovetail section (34) is designed asymmetrically in the following manner: the cutting tool (3) extends along a guide direction and is provided for insertion into a tool receiver (24) along the guide direction, The dovetail section (34) comprises two reference surfaces (33a, 33b) arranged on opposite sides of the dovetail section (34) and located in a common reference plane; The dovetail section (34) comprises a first guide surface (31) and a second guide surface (32), the reference surface (33a, 33b), the first guide surface (31) and the second guide surface (32) extend parallel to the guide direction, the first guide surface (31) and a first reference surface (33a) of the reference surfaces form a first guide angle in a region outside the cutting tool (3), the second guide surface (32) and a second reference surface (33b) of the reference surfaces form a second guide angle in a region outside the cutting tool (3), · wherein the first guide angle and the second guide angle are acute angles and are different.

12. The cutting tool (3) according to claim 11, wherein: The first guide angle and the second guide angle differ by at least 3° or at least 5°.

13. The cutting tool (3) according to claim 11 or 12, wherein: Relative to the cutting direction of the cutting edge (36), the leading of the two lead angles is the larger lead angle.

14. The cutting tool (3) according to claim 11 or 12, wherein: The first guide angle is 65° and the second guide angle is 70°.

15. A basic body (2) for use in a machine reaming tool (1) according to any one of claims 1 to 10, comprising tool receivers (24) each forming a prismatic sliding guide as a linear guide for receiving a cutting tool (3) in a direction orthogonal to the axis of rotation of the machine reaming tool (1), It is characterized in that The linear guides are respectively prismatic sliding guides in the form of dovetail guides for receiving a cutting tool (3) having a dovetail section (34) with a first guide surface (31) and a second guide surface (32) which interact with a first receiving surface (21) and a second receiving surface (22) of the basic body (2) to define the dovetail guide, and The base body (2) comprises a clamping body (4) which, when the cutting tool (3) is inserted into the tool receiver (24), interacts with the second receiving surface (22) and exerts a force therein which presses the first guide surface (31) against the first receiving surface (21).

16. The basic body (2) according to claim 15, comprising several coolant feeds (26), each of which is assigned to a tool receiver (24), wherein A coolant feed (26) is guided through the base body (2) to a nozzle receiver (27), a jet channel (28) is guided from the nozzle receiver (27) in the direction of the assigned tool receiver (24), and a nozzle body (5) is inserted into the nozzle receiver (27), the nozzle body (5) comprising a recess (51) extending around the nozzle body (5) in a circumferential direction, and the circumferential side of the recess (51) defines the jet direction of the coolant jet fed through the coolant feed (26).

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