Thread cutting chuck

Abstract

Thread cutting chuck (1) for synchronous thread cutting, comprising - a shank (2) as a component (5) of the thread cutting chuck (1) for the machine-side drive, - an intermediate part (3) as a component (5) of the thread cutting chuck (1), - a clamping device (4) as a component (5) of the thread cutting chuck (1) for fixing a tap (6), - wherein the intermediate part (3) connects the receiving shaft (2) to the clamping means (4), - an elastomer element (7) with a modulus of elasticity between 0.05 and 10 GPa for cushioning an axial play in the axial direction (48) of the thread cutting chuck (1) between the receiving shank (2) and the clamping means (4) due to the elastic properties of the elastomer element (6), - a first support element (16) for applying a force to the elastomer element (7) and the first support element (16) rests on the elastomer element (7), - a second support element (18) for applying a force to the elastomer element (7) and the second support element (18) rests on the elastomer element (7), characterized in that the thread-cutting chuck comprises an elastomer element (7) with a modulus of elasticity between 0.05 and 10 GPa for cushioning a tangential play in the direction of rotation (49) of the thread-cutting chuck (1) between the receiving shank (2) and the clamping means (4) due to the elastic properties of the elastomer element (6) and the elastomer element (7) has a greater spring constant in a first axial direction (48) than in a second axial direction (48) and the first and second axial directions (48) are oriented opposite to one another and the elastomer element (7) has a greater spring constant in a first direction of rotation (49) than in a second direction of rotation (49) and the first and second directions of rotation (49) are oriented opposite to each other and the spring constant of the elastomer element (7) is determined according to Hooke's law.

Description

[0001] The present invention relates to a thread cutting chuck for synchronous thread cutting according to the preamble of claim 1.

[0002] During thread cutting, a thread is machined or cut into a workpiece using a tap. The thread of the tap has a specific pitch. Depending on the pitch of the tap, it is necessary to move the tap in an axial direction as a translational movement while cutting the thread. This is carried out by a machine-side drive, particularly a CNC machine tool. In addition, the tap also performs a rotational movement in a specific direction of rotation to cut the thread. The translational speed is also referred to as the feed rate, and this depends on the tap's pitch.In CNC machine tools, a computer synchronizes the thread cutting process by recording the machine's linear motion as the axial movement and the machine's rotary motion as the rotary or rotational movement using corresponding pulse generators. However, the accuracy of the machine's rotary motion and linear motion cannot be precisely recorded, and deviations also occur in the tap's pitch during thread production. Precise synchronization of the machine spindle or thread chuck feed rate with the rotational movement is not entirely possible.

[0003] To prevent the occurrence of large axial forces on the tapping chuck in the tensile and compressive directions, particularly during reversal, i.e., when reversing the rotational movement at the end of the tapping process to unscrew the tap, it is already known to use elastomer elements to cushion axial play in the axial direction of the tapping chuck and tangential play in the direction of rotation of the tapping chuck between a shank and a clamping device for the tap due to the elastic properties of the elastomer element. However, the elastomer element has essentially the same spring constant in two axial directions that are oriented opposite to each other. This also applies analogously to two opposite directions of rotation.However, when cutting a thread into a hole in a workpiece with a tap, it is generally necessary and desirable to have a different spring constant of the elastomer element available to cushion the axial play in the tensile and compressive directions to optimize the thread cutting process during axial movement. This also applies analogously to the direction of rotation, i.e., for cutting in one direction of rotation and for the opposite direction of rotation after reversing.

[0004] EP 0 887 135 A1 shows a thread cutting chuck for CNC machine technology "rigid tapping", with a clamping device, in particular a collet, for the tap held in a chuck shaft, wherein a receiving part is arranged between the clamping device and the chuck shaft, which is held in the chuck shaft without play in the direction of rotation and has a slight axial play in the tensile and compressive directions, which is cushioned by elastomer connections.

[0005] DE 20 2015 102 119 U1 shows a thread-cutting chuck for synchronous thread cutting, with a receiving part for the machine-side drive and with a clamping means for a tap, between which an intermediate part is arranged, wherein the intermediate part is resiliently connected to the receiving part in the axial direction via at least one elastomer element, wherein at least one first ball for torque transmission is received between the receiving part and the intermediate part with play in the direction of rotation and in the axial direction, and at least one second ball is received in the receiving part so as to be movable in the radial direction, which is coupled to the clamping means via the elastomer element in such a way that a resilience in the axial direction and in the direction of rotation is produced, cushioned by the elastomer element. The second ball thus forms a first support element for the elastomer element and the intermediate part forms a second support element for the elastomer element.

[0006] EP 0 887 135 A1 discloses a thread cutting chuck which has no play in the direction of rotation and only a slight play in the axial direction, cushioned by elastomer connections.

[0007] DE 20 2018 100 313 U1 shows a chuck for clamping a tool. The chuck comprises compensation elements made of plastic and / or elastically designed to dampen the axial movement of a chuck body relative to a shank body. Furthermore, balls are formed on an outer circumference of the chuck body, which form torque drivers. The torque drivers enable backlash-free torque transmission in the direction of rotation, i.e., a direct and rigid transmission of torque from the shank body to the chuck body.

[0008] The object of the present invention is therefore to provide a thread cutting chuck in which the process requirements for machining a thread with a tap are optimized for stress in different axial and / or tangential directions.

[0009] This object is achieved with a thread cutting chuck for synchronous thread cutting, comprising a receiving shaft as a component of the thread cutting chuck for the machine-side drive, an intermediate part as a component of the thread cutting chuck, a clamping device as a component of the thread cutting chuck for fixing a tap, wherein the receiving shaft is connected to the clamping device via the intermediate part, an elastomer element with a modulus of elasticity between 0.05 and 10 GPa for cushioning an axial play in the axial direction of the thread cutting chuck between the receiving shaft and the clamping device due to the elastic properties of the elastomer element, a first support element for applying a force to the elastomer element and the first support element rests on the elastomer element, a second support element for applying a force to the elastomer element and the second support element rests on the elastomer element,wherein the thread cutting chuck comprises an elastomer element with a modulus of elasticity between 0,0.5 to 10 GPa for cushioning tangential play in the direction of rotation of the tapping chuck between the shank and the clamping device due to the elastic properties of the elastomer element, and the elastomer element has a greater spring constant in a first axial direction than in a second axial direction, and the first and second axial directions are oriented opposite to one another, and the elastomer element has a greater spring constant in a first direction of rotation than in a second direction of rotation, and the first and second directions of rotation are oriented opposite to one another, and the spring constant of the elastomer element is determined according to Hooke's law. The spring constant as a proportionality factor of the elastomer element is determined according to Hooke's law. Preferably, the spring constant in the first axial direction is 10%, 20%, 30%, 50%, 70%, 100%, 150%.200% or 300% greater than the spring constant in the second axial direction. Preferably, the spring constant of the elastomer element in the first direction of rotation is 10%, 30%, 50%, 70%, 100%, 150%, 200%, or 300% greater than the spring constant in the second direction of rotation.

[0010] In a further embodiment, the thread-cutting chuck, in particular the elastomer element and the first and second support elements, is designed such that the first and second support elements rest on the elastomer element to apply a compressive force to the elastomer element to cushion the axial and / or tangential play. The cushioning of the axial and / or tangential play is thus achieved by applying a compressive force to the elastomer element from the first and second support elements.

[0011] In a supplementary variant, the elastomer element between the first and second support element is divided in the axial direction into a first axial section and a second axial section.

[0012] The first axial section expediently has a smaller extension in the axial direction than the second axial section, so that the elastomer element has a greater spring constant in the first axial direction than in the second axial direction. Due to the different extensions of the first and second axial sections, the elastomer element can have a different spring constant in the first and second axial directions, even with a constant modulus of elasticity of the elastomer element. The greater the extension of an axial section, the smaller the spring constant of this axial section, and vice versa, with a constant modulus of elasticity of the elastomer element.

[0013] In a further embodiment, the first axial section has a larger modulus of elasticity in the axial direction than the second axial section, so that the elastomer element has a larger spring constant in the first axial direction than in the second axial direction. The larger the modulus of elasticity of an axial section, the larger the spring constant of that axial section.

[0014] In a further embodiment, the elastomer element between the first and second support element is divided in the direction of rotation into a first tangential section and a second tangential section.

[0015] In a supplementary embodiment, the first tangential section has a smaller extension in the tangential direction than the second tangential section in the tangential direction, so that the elastomer element has a larger spring constant in the first tangential direction than in the second tangential direction. The larger the extension of a tangential section, the smaller the spring constant of this tangential section, and vice versa, with a constant elastic modulus of the elastomer element.

[0016] In an additional variant, the first tangential section has a larger modulus of elasticity in the tangential direction than the second tangential section in the tangential direction, so that the elastomer element has the larger spring constant in the first tangential direction than in the second tangential direction.

[0017] In an additional embodiment, the first support element is designed as a pin and the second support element is designed as a boundary of a recess or vice versa.

[0018] In an additional variant, the elastomer element has a bore and the pin is arranged in the bore, so that the pin rests on a partial outer side of the elastomer element which delimits the bore and another partial outer side of the elastomer element rests on the second support element as the boundary of the recess.

[0019] In a supplementary embodiment, the pin is fastened to the receiving shaft and the recess is formed on the intermediate part, in particular a sleeve-shaped section of the intermediate part.

[0020] In an additional embodiment, the pin and / or the recess are oriented substantially radially. Substantially radially preferably means that the pin and / or the recess are oriented with a deviation of less than 30°, 20°, 10°, or 5° from a radial direction.

[0021] In a further embodiment, the thread-cutting chuck has an axial stop for limiting the cushioned axial play, comprising a first axial stop element and a second axial stop element. The thread-cutting chuck has a tangential stop for limiting the cushioned tangential play, comprising a first tangential stop element and a second tangential stop element. In a thread-cutting chuck, the cushioning of the axial play or the axial play cannot be unlimited, so an axial stop is necessary for precisely limiting the axial play. This applies analogously to the tangential play as a play for different rotational positions of the tap.

[0022] In a supplementary variant, the first axial stop element and / or the first tangential stop element are designed as a bolt and the second axial stop element and / or the second tangential stop element are designed as a radial limitation and / or axial limitation of a recess and the bolt is arranged within the recess.

[0023] In an additional embodiment, the bolt is attached to the intermediate part and the recess is formed on the receiving shaft or vice versa.

[0024] In an additional variant, the first axial stop element is arranged with a play in the first and second axial directions with respect to the second axial stop element.

[0025] In an additional variant, the first tangential stop element is arranged with a play in the first and second tangential directions with respect to the second tangential stop element.

[0026] In a supplementary embodiment, the first and / or second support element rests on the elastomer element with a compressive force.

[0027] Preferably, the first and / or second support element rests directly or indirectly on the elastomer element.

[0028] In a further embodiment, the elastomer element is divided into the first and second axial sections in the axial direction by the first or second support element and / or a bore in the elastomer element.

[0029] In a further embodiment, the elastomer element is divided into the first and second tangential sections in the direction of rotation by the first or second support element and / or a bore in the elastomer element.

[0030] The elastomer element is expediently made of an elastomer, in particular rubber and / or NBR and / or SBR (styrene-butadiene rubber) and / or EPDM and / or FKM and / or silicone.

[0031] In a further embodiment, the elastic modulus in GPa of the elastomer element is between 0.05 and 10, in particular between 0.5 and 5.

[0032] In a further embodiment, the elastomer element is made of plastic, in particular CFRP and / or GFRP, preferably fiber-reinforced CFRP and / or fiber-reinforced GFRP.

[0033] In an additional variant, the elastomer element is made of textiles and / or leather and / or metal, in particular steel and / or brass and / or aluminum.

[0034] In a supplementary embodiment, the elastomer element is made of paper or paper, in particular paper or cardboard with a honeycomb structure.

[0035] In an additional variant, at least one cavity, preferably several cavities, is / are formed in the elastomer element, in particular as at least one through-opening. The at least one cavity reduces the spring constant of the elastomer element, so that with a large number of cavities, the elastomer element functions approximately according to the principle of a leaf spring with several spring leaves.

[0036] In a further embodiment, the at least one cavity of the elastomer element is substantially crescent-shaped and / or semicircular and / or elliptical and / or circular in cross section.

[0037] Advantageously, no support element is arranged in the at least one cavity. When a force, in particular a compressive force, is applied to the elastomer element, the elastomer element can deform, and the volume of the at least one cavity decreases.

[0038] In a further variant, the receiving shaft and / or the intermediate part and / or the clamping means are made of metal, in particular steel.

[0039] In the following, embodiments of the invention are described in more detail with reference to the accompanying drawings.

[0040] It shows: Fig. 1 a longitudinal section of a shank of a thread cutting chuck, Fig. 2 a longitudinal section of an intermediate part of the thread cutting chuck, Fig. 3 a side view of the intermediate part according to Fig. 2 of the thread cutting chuck, Fig. 4 a longitudinal section of the thread cutting chuck, Fig. 5 a cross section AA according to Fig. 1 of the receiving shaft, Fig. 6 an enlarged partial longitudinal section of the threaded chuck according to Fig. 4, Fig. 7a is a plan view of an elastomer element in a first embodiment in a first arrangement, Fig. 7b a plan view of the elastomer element in the first embodiment in a second arrangement Fig. 7c is a perspective view of the elastomer element in the first embodiment, Fig. 8a is a plan view of the elastomer element in a second embodiment in a first arrangement, Fig. 8b is a plan view of the elastomer element in the second embodiment in a second arrangement, Fig. 8c is a plan view of the elastomer element in the second embodiment in a third arrangement, Fig. 8d is a plan view of the elastomer element in the second embodiment in a fourth arrangement, Fig. 9a is a plan view of the elastomer element in a third embodiment in a first arrangement, Fig. 9b is a plan view of the elastomer element in the third embodiment in a second arrangement, Fig. 9c a plan view of the elastomer element in the third embodiment in a third arrangement, Fig. 9d is a plan view of the elastomer element in the third embodiment in a fourth arrangement, Fig. 10a is a plan view of the elastomer element in a fourth embodiment in a first arrangement, Fig. 10b is a plan view of the elastomer element in the fourth embodiment in a second arrangement, Fig. 10c is a plan view of the elastomer element in the fourth embodiment in a third arrangement, Fig. 11a is a plan view of the elastomer element in a fifth embodiment in a first arrangement and Fig. 11b a plan view of the elastomer element in the fifth embodiment in a second arrangement.

[0041] A thread-cutting chuck 1 is fastened by a shank 2 to a machine-side drive (not shown), in particular a CNC machine tool. A tap 6 is fastened to a clamping device 4 in a form-fitting and / or force-fitting manner for machining a thread in a workpiece (not shown). The shank 2 is mechanically coupled and connected to the clamping device 4 by means of an intermediate part 3. The shank 2, the clamping device 4, and the tap 6 each form components 5 of the thread-cutting chuck 1. The shank 2 has a first central bore 31 with a larger diameter than a second central bore 32. An external thread 20 on the shank 2 serves for the mechanical coupling to the machine-side drive. Furthermore, a step 30 is formed on the outside of the shank 2, which acts as a stop for the intermediate part 3.Like the thread-cutting chuck 1, the receiving shank 2 has a central longitudinal axis 46, which simultaneously forms a rotational axis 47 of the thread-cutting chuck 1. An axial direction 48 is thus aligned parallel to the central longitudinal axis 46 and the rotational axis 47 of the thread-cutting chuck 1. A radial direction 50 is aligned perpendicular to the central longitudinal axis 46 and thus also to the rotational axis 47. A tangential direction 49, as a rotational direction 49, is perpendicular to the plane of the drawing. Fig. 1, Fig. 2, Fig. 3 and Fig. 4. Two fastening bores 29 are machined as blind holes in the radial direction 50 on the receiving shaft 2. Furthermore, two recesses 28 are machined on the outside of the receiving shaft 2. An axial boundary 44 of the recess 28 forms a second axial stop element 24 and a radial boundary 41 of the recess 28 forms a second tangential stop element 26. A centering pin 21 is formed on an end of the receiving shaft 2 opposite the external thread 20 and facing the machine-side drive ( Fig. 1). The recess 28 of the receiving shaft 2 has the radial boundary 41 in the radial direction 50. The radial boundary 41 is divided into a first flat section 42 and a second flat section 43 ( Fig. 5). In the axial direction 48, the recess 28 is delimited by two axial boundaries 44.

[0042] The intermediate part 3 has a central bore 37 with a constant diameter. On the outside of the intermediate part 3, facing the external thread 20, a conically tapered section 36 is formed. Two continuous recesses 19 are formed on the intermediate part 3, which are aligned in the radial direction 50. The recesses 19 are delimited by a boundary 45 of the intermediate part 3, and the boundaries 45 of the recesses 19 form second support elements 18. Furthermore, a total of four fastening bores 38 are formed on a sleeve-shaped section 22 of the intermediate part 3. Two fastening bores 38 are aligned with one another in the radial direction 50, and a bolt 27 is arranged and fastened in each of the two aligned bores 38. At an end of the intermediate part 3 facing the tap 6, a central centering bore 40 for the centering pin 21 is formed.A partial area 39 of the fastening bore 38 projects into the central bore 37 of the intermediate part 3, so that in one area the bolt 27 is arranged partly in the partial area 39 of the fastening bore 38 and additionally partly in the recess 28 (. Fig. 6).

[0043] An elastomer element 7 ( Fig. 7a, Fig. 7b, Fig. 7c) made of rubber as an elastomer, has a bore 33 which is aligned substantially in the radial direction 50, i.e. with a deviation of less than 30°, 20°, 10° or 5°, to the radial direction 50 of the thread-cutting chuck 1, analogous to the fastening bores 29 in the receiving shaft 2. The bores 33 of the elastomer element 7 are delimited by a partial outer side 34 of the elastomer element 7. In each of the two fastening bores 29 of the receiving shaft 2, a pin 17 made of metal, in particular steel, is fastened as a first support element 16, substantially aligned in the radial direction 50. A partial region of the pin 17 protrudes from the fastening bore 29 and is arranged in the bore 33 of the elastomer element 7. The thread cutting chuck 1 has two elastomer elements 7, each of which is arranged in the recess 19 of the intermediate part 3, with the pin 17 being arranged in the bore 33 of the elastomer element 7.Thus, a partial outer side 35 of the elastomer element 7 rests on the boundary 45 of the recess 19 of the intermediate part 3. Preferably, the extension of the elastomer element 7 is designed such that, even without stress on the thread-cutting chuck 1, the partial outer side 35 rests elastically prestressed on the boundary 45 and the partial outer side 34 at the bore 33 rests elastically prestressed on the pin 17, i.e., there is always contact between the partial outer side 34 of the bore 33 and the pin 17 and between the partial outer side 35 of the elastomer element 7 and the boundary 45.

[0044] In two aligned mounting holes 38 of the intermediate part 3, a bolt 27 is fastened, which forms a first tangential stop element 25 and a first axial stop element 23. One of the two bolts 27 is partially arranged in the recess 28. In Fig. 5, the bolts 27 are shown in dashed lines. Without any load being placed on the thread cutting chuck 1, the bolt 27 has play with respect to both axial limits 44 of the recess 28 and also with respect to the radial limit 41 of the recess 28. The bolt 27 and the radial limit 41 as well as the axial limit 44 thus form an axial stop and a tangential stop for limiting the cushioned axial and tangential play on the clamping device 4 and thus also on the tap 6. If the outer side of the steel bolt 27 comes to rest on one of the two axial limits 44 in a first or second axial direction, the cushioned axial play of the clamping device 4 is thus limited.Similarly, the cushioned tangential play of the clamping device 4 is limited in the direction of rotation as soon as the bolt 27 comes to rest on the radial limit 41, i.e., either on the first flat section 42 or the second flat section 43, to limit the cushioned axial play in the first or second direction of rotation. Due to the flat design of the first and second flat sections 42, 43 of the radial limit 41, the cylindrical bolt 27 rests on the radial limit 41 over a large area, so that no stress peaks can occur between the bolt 27 and the radial limit 41 of the intermediate part 3.

[0045] The elastomer element 7 is made of rubber with a constant modulus of elasticity. In a first axial direction (left of the bore 33 according to Fig. 7a) the elastomer element 7 in the first embodiment according to Fig. 7a a first axial section 8 with an extension 10 on and in a second axial direction (right of the bore 33 according to Fig. 7a) has a second axial section 9 with an extension 11. In the tangential direction 49, the elastomer element 7 ( Fig. 7a) a first tangential section 12 (above the bore 33 according to Fig. 7a) in a first direction of rotation and a second tangential section 13 (below the bore 33 according to Fig. 7a) in a second direction of rotation. The first tangential section 12 has an extension 14, and the second tangential section 13 has an extension 15. The extension 10 of the first axial section 8 is significantly larger than the extension 11 of the second axial section 9. The first axial section 8 serves to elastically cushion the axial play in the first axial direction, and the second axial section of the elastomer element 7 serves to cushion the axial play in the second axial direction. Analogously, the first tangential section 12 serves to elastically cushion the tangential play in a first direction of rotation, and the second tangential section 13 serves to elastically cushion the tangential play in a second direction of rotation of the thread-cutting chuck 1.The first tangential section 12 is significantly larger in extent 14 than the extent 15 of the second tangential section 13, so that the first tangential section 12 has a smaller spring constant than the second tangential section 13. Accordingly, the first axial section 8 has a smaller spring constant than the second axial section 9. The first and second axial directions and the first and second directions of rotation can be defined arbitrarily on the thread-cutting chuck 1. The elastomer element 7 in the first exemplary embodiment is substantially straight and partially circular on the outer side 35 for insertion into the correspondingly complementary boundary 45.

[0046] In Fig. 8a to 8d show a second embodiment of the elastomer element 7. The partial outer side 35 of the elastomer element 7 is designed in the shape of a cylinder jacket, so that the elastomer element 7 can be arranged in a cylinder jacket-shaped boundary 45 (not shown) of the recess 19 of the intermediate part 3 in different rotational positions, so that with an identical elastomer element 7, different extensions 10, 11 of the first and second axial sections 8, 9 and different extensions 14, 15 of the first and second tangential sections 12, 13 can be achieved according to the Fig. 8a to 8d. This applies analogously to a third embodiment ( Fig. 9a, Fig. 9b, Fig. 9c, Fig. 9d) of the elastomer element 7, which is square on the outer part 35.

[0047] In Fig. 10a to 10c, a fourth embodiment of the elastomer element 7 is shown. The partial outer side 35 of the elastomer element 7 is essentially triangular in shape and by a different arrangement of the identical elastomer element 7 in a correspondingly complementary triangular boundary 45 of the recess 9, different dimensions 10, 11, 14, 15 can be achieved in accordance with the embodiments described above and this applies analogously to the fifth embodiment of the elastomer element 7, which in the Fig. 11a and Fig. 11b is shown.

[0048] Overall, the thread cutting chuck 1 according to the invention offers significant advantages. A tap 6 is attached to the thread cutting chuck 1. A thread is machined into a workpiece by means of the tap 6. While the thread is being machined, the thread cutting chuck 1 is moved by a machine-side drive, in particular a CNC machine tool, in the axial direction 48 at a specific feed rate and simultaneously moved in the tangential direction 49 at a specific angular speed as well as a specific rotational speed corresponding to the pitch of the tap 6. Due to manufacturing inaccuracies in the pitch of the tap 6 and the fact that the thread cutting chuck 1 cannot be guided with absolute precision in the axial direction 48 at the feed rate and the angular speed or rotational speed in the tangential direction 49 orIn the direction of rotation 49, deviations occur between the pitch of the tap 6 and the necessary feed and rotation speed of the tap 6. For this reason, it is necessary, in particular to avoid high forces occurring on the thread cutting chuck 1, to provide axial and tangential play in the axial and tangential directions 48, 49, which is elastically cushioned by the elastomer element 7. In order to optimize the machining of a thread by means of the tap 6, it is necessary to provide a different optimized spring constant in the first and second axial directions, specifically for the axial play in the first axial direction and the second axial direction. This applies analogously to the tangential play, specifically in the first direction of rotation and the second direction of rotation.Due to the structural design of the elastomer element 7 at the boundary 45 and the pin 17 with different extensions 10, 11 in the first and second axial sections 8, 9 and different extensions 14, 15 in the first and second tangential sections 12, 13, different spring constants in the first and second axial directions and in the first and second rotational directions can be easily achieved. By appropriately designing the geometry of the boundary 45 and the partial outer side 35 of the elastomer element 7, different spring constants in the first and second axial directions and in the first and second rotational directions can be advantageously achieved simply by a different rotational position of the elastomer element 7 in the boundary 45 of the recess 19.The thread cutting chuck 1 is therefore inexpensive to manufacture, reliable in operation and, due to its structural design, can easily have different spring constants in the axial and rotational directions to optimize the cutting of a thread with the tap 6.

Claims

[1] Thread cutting chuck (1) for synchronous thread cutting, comprising - a receiving shaft (2) as component (5) of the threading chuck (1) for machine-side drive, - an intermediate part (3) as a component (5) of the threading chuck (1), - a clamping device (4) as a component (5) of the threading chuck (1) for fixing a tap (6), - wherein the intermediate part (3) connects the receiving shaft (2) to the clamping device (4), - an elastomeric element (7) with a modulus of elasticity between 0.05 and 10 GPa for cushioning an axial play in the axial direction (48) of the threading chuck (1) between the receiving shank (2) and the clamping device (4) due to the elastic properties of the elastomeric element (6), - a first support element (16) for applying a force to the elastomer element (7) and the first support element (16) rests on the elastomer element (7), - a second support element (18) for applying a force to the elastomer element (7) and the second support element (18) rests on the elastomer element (7), characterized by , that the threading chuck comprises an elastomer element (7) with a modulus of elasticity between 0.05 and 10 GPa for cushioning a tangential play in the direction of rotation (49) of the threading chuck (1) between the receiving shank (2) and the clamping device (4) due to the elastic properties of the elastomer element (6). and the elastomer element (7) has a larger spring constant in a first axial direction (48) than in a second axial direction (48) and the first and second axial directions (48) are oriented opposite to each other and the elastomer element (7) has a larger spring constant in a first direction of rotation (49) than in a second direction of rotation (49) and the first and second directions of rotation (49) are oriented opposite to each other and the spring constant of the elastomer element (7) is determined according to Hooke's law. [2] Thread cutting chuck according to claim 1, characterized by , that the thread cutting chuck (1) is designed such that the first and second support elements (16, 18) rest on the elastomer element (7) to apply a compressive force to the elastomer element (7) to cushion the axial and / or tangential play. [3] Thread cutting chuck according to claim 1 or 2, characterized by , that the elastomeric element (7) between the first and second support element (16, 18) is divided in the axial direction (48) into a first axial section (8) and a second axial section (9). [4] Thread cutting chuck according to claim 3, characterized by , that the first axial section (8) in the axial direction (48) has a smaller extent (10, 11) than the second axial section (9) in the axial direction (48), so that the elastomer element (7) in the first axial direction (48) has a larger spring constant than in the second axial direction (48). [5] Thread cutting chuck according to claim 3 or 4, characterized by , that the first axial section (8) in the axial direction (48) has a larger modulus of elasticity than the second axial section (9) in the axial direction (48), so that the elastomer element (7) in the first axial direction (48) has a larger spring constant than in the second axial direction (48). [6] Thread cutting chuck according to one or more of the preceding claims, characterized by, that the elastomeric element (7) between the first and second support element (16, 18) is divided in the direction of rotation (49) into a first tangential section (12) and a second tangential section (13). [7] Thread cutting chuck according to claim 6, characterized by , that the first tangential section (12) in the tangential direction (49) has a smaller extent (14, 15) than the second tangential section (13) in the tangential direction (49), so that the elastomeric element (7) has a larger spring constant in the first tangential direction (49) than in the second tangential direction (49). [8] Thread cutting chuck according to claim 6 or 7, characterized by, that the first tangential section (12) in the tangential direction (49) has a larger modulus of elasticity than the second tangential section (13) in the tangential direction (49), so that the elastomeric element (7) in the first tangential direction (49) has a larger spring constant than in the second tangential direction (49). [9] Thread cutting chuck according to one or more of the preceding claims, characterized by , that the first support element (16) is designed as a pin (17) and the second support element (18) is designed as a boundary (45) of a recess (19) or vice versa. [10] Thread cutting chuck according to claim 9, characterized by, that the elastomeric element (7) has a bore (33) and the pin (17) is arranged in the bore (33) such that the pin (17) rests on a partial outer surface (34) of the elastomeric element (7) which limits the bore (33) and another partial outer surface (35) of the elastomeric element (7) rests on the second support element (18) as the limit (45) of the recess (19). [11] Thread cutting chuck according to claim 9 or 10, characterized by , that the pin (17) is attached to the receiving shaft (2) and the recess (19) is formed on the intermediate part (3). [12] Thread cutting chuck according to one or more of claims 9 to 12, characterized by , that the pin (17) and / or the recess (19) is substantially aligned in the radial direction (50). [13] Thread cutting chuck according to one or more of the preceding claims, characterized by , that the threading chuck (1) has an axial stop to limit the spring-loaded axial play with a first axial stop element (23) and a second axial stop element (24). and the thread cutting chuck (1) has a tangential stop to limit the spring-loaded tangential play with a first tangential stop element (25) and a second tangential stop element (26). [14] Thread cutting chuck according to claim 13, characterized by , that the first axial stop element (23) and / or the first tangential stop element (25) are designed as a bolt (27) and the second axial stop element (24) and / or the second tangential stop element (26) are designed as a radial limit (41) and / or axial limit (44) of a recess (28). and the bolt (27) is arranged within the recess (28). [15] Thread cutting chuck according to claim 14, characterized by that the bolt (27) is attached to the intermediate part (3) and the recess (28) is formed on the receiving shaft (2) or vice versa.

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