Use of a thread-cutting region for producing threads, method for producing threads, and thread-cutting tool

Abstract

The invention relates to the use of a thread-cutting region (2) for producing threads on a component (29), comprising at least one pin (25) extending axially along a longitudinal axis (28) and comprising a circumferential wall (26) which surrounds the pin (25) circumferentially and at a radial distance thereto such that a free space (27) is formed between the circumferential wall (26) and the pin (25) and the pin (25) protrudes axially out of the free space (27). The thread-cutting region (2) has a front thread-cutting tooth (3), which protrudes freely in the axial direction at least in some parts, for immersing into the free space (27) in the axial direction.

Description

[0001] USE OF A THREADING AREA FOR THREAD PRODUCE, METHOD FOR THREAD PRODUCE AND THREADING TOOL

[0002] The present invention relates to uses of a thread cutting area for external and internal thread production, a method for thread production and a thread cutting tool.

[0003] EP 3 892405 A1 discloses a threading insert used for producing an external thread, thus demonstrating a use of the threading insert for thread production or a method for thread production. In this context, with respect to a pin extending axially from a base surface and radially spaced from a circumferential wall, there is a need to complete an external thread at the axial height of an end face of the circumferential wall. In the method and application known from EP 3 892405 A1, the threading insert shown would collide with such a circumferential wall at its end face when an external thread is cut at the axial height of this end face.Consequently, the maximum achievable effective thread length along the journal above the circumferential wall is shorter, and / or the circumferential wall must be thinned to create more space in the radial direction for the tap insert to plunge into the circumferential wall. However, the former impairs the threading function of the journal, meaning the last thread flank outside the circumferential wall is no longer cut cleanly; the latter weakens the circumferential wall. Analogous problems arise when cutting internal threads into the inside of a circumferential wall surrounding an annular inner wall; the annular inner wall obstructs the tap insert during axial thread cutting.

[0004] The object of the present invention is to provide a use, a method and a thread cutting tool with which the disadvantages of the prior art are overcome.

[0005] The technical problem of the present invention is solved by the use of a thread-cutting area according to claims 1 and 3 and by the method according to claim 2. Advantageous embodiments can be found in the dependent claims. The use according to claim 1 relates to external thread cutting. According to the use according to claim 1, a thread-cutting area is used for thread production on a component with at least one pin extending axially along a longitudinal axis and a circumferential wall, wherein the circumferential wall surrounds the pin circumferentially and radially spaced, so that a clearance is formed between the circumferential wall and the pin, and the pin projects axially from the clearance, wherein the thread-cutting area has a front thread-cutting tooth that cantilevers axially at least partially for axial engagement in the clearance.When the threading area is used, the front cutting tooth dips into the clearance to cut a lower external thread section on the lower tang section located within the clearance. This cleanly completes an upper external thread section on the tang, which is typically already cut outside the clearance by the threading area. The upper external thread section then terminates at the axial height of an end face of the circumferential wall, at the transition to the clearance. The lower external thread section is generated by the axially freely projecting cutting tooth.By having the threading area feature a front threading tooth that cantilevers axially, at least in part, a collision between the threading area and / or a supporting area of ​​a threading tool with the circumferential wall is avoided when the front threading tooth enters the clearance. Because the front threading tooth cantilevers axially, at least in part, it is undercut to that extent and could otherwise become entangled with the circumferential wall when the threading area is moved radially away from the tang.

[0006] The method according to claim 2 also relates to external thread cutting. The method according to claim 2 comprises at least the following steps for thread production: providing a component with at least one pin extending axially along a longitudinal axis and a circumferential wall that surrounds the pin circumferentially and radially spaced apart, such that a clearance is formed between the circumferential wall and the pin; providing a thread cutting area having a front thread cutting tooth that projects axially freely at least partially; cutting an upper external thread section located outside the clearance on the pin with the thread cutting area; cutting a lower external thread section connected to the upper external thread section on the pin by axially plunging the front thread cutting tooth at least partially into the clearance.The upper and lower external thread sections form a continuous external thread that extends along the journal from outside the clearance into the clearance. In this method and the described application, the lower external thread section ensures that the upper external thread section is cut at least as far as the clearance and thus axially to the axial position of the circumferential wall, while maintaining specified thread dimensions and tolerances. The circumferential wall typically has a flat end face that extends transversely to the longitudinal axis.When another component with an internal thread section and a bearing surface designed for end-face contact with the circumferential wall is screwed onto the pin, the bearing surface can therefore make particularly close contact with the circumferential wall; the bearing surface typically extends transversely to the longitudinal axis when the other component is screwed on and is flat. Without the lower external thread section, the last thread of the upper external thread section at the axial transition into the clearance would be of inferior quality because the cutting of the upper external thread would have to be stopped shortly before reaching the clearance, resulting in a thread runout outside the clearance, and / or it would end further up from the circumferential wall, i.e., be shorter. According to the method and the described application, the thread runout is prevented by the lower

[0007] The external thread section is relocated into the clearance. This is made possible by the fact that the front threading tooth is axially plunged into the clearance, at least partially, to cut the thread. Because the threading area has a front threading tooth that cantilevers freely, at least partially, axially, a collision between the threading area and / or a supporting area of ​​a threading tool with the circumferential wall is avoided when the front threading tooth plunges into the clearance. Since the front threading tooth cantilevers freely, at least partially, it is undercut to that extent and could otherwise become entangled with the circumferential wall when the threading area is moved radially away from the journal.

[0008] A person skilled in the art understands the term "thread cutting tooth" within the meaning of the present disclosure to mean that a thread can be produced using a thread cutting tooth that is usually standardized, and can thus distinguish the thread cutting area from cutting areas for parting off and grooving. The leading thread cutting tooth usually has a triangular or trapezoidal shape. The thread cutting area is usually made of cemented carbide, and the component is usually made of a metal alloy, for example, steel. The thread cutting area may have further thread cutting teeth arranged downstream of the leading thread cutting tooth with respect to the direction of axial penetration into the clearance. When cutting the upper external thread section and when cutting the lower external thread section, at least the leading thread cutting tooth cuts.

[0009] The thread cutting tooth engages the journal by rotating the component relative to the threading area with respect to its longitudinal axis and by moving it axially relative to the threading area with respect to its longitudinal axis, so that the leading thread cutting tooth is first moved axially towards the clearance and then plunged into it. The journal is rotationally symmetrical with respect to its longitudinal axis. The circumferential wall is also typically rotationally symmetrical with respect to its longitudinal axis.

[0010] In the use according to claim 1 and the method according to claim 2, it is particularly advantageous if the threading area is a monolithic part of a threading insert, wherein the threading insert has a top surface, a bottom surface and a side surface connecting the top surface to the bottom surface, wherein the front threading tooth has a front cutting edge at the transition from the side surface to the top surface, wherein the threading insert extends vertically transversely to the extent of the top surface along a central vertical axis, wherein the front

[0011] The thread cutting tooth extends axially, at least partially, projecting from a flat axial stop surface of the thread cutting insert, forming a clearance surface, wherein the clearance surface and the stop surface extend continuously from the top to the bottom in the side surface, wherein the clearance surface extends at a clearance angle relative to the central vertical axis or extends parallel to the central vertical axis, wherein the clearance angle is dimensioned parallel to a normal vector of the stop surface in the viewing direction and towards the stop surface in the viewing direction, wherein the apex of the clearance angle is arranged on the side of the top, and wherein the clearance angle is in the range of greater than 0° to 70°.The clearance surface extended in this way radially undercuts the leading thread cutting tooth if the clearance surface is extended at the clearance angle, or it is neutral with respect to such an undercut if it is extended parallel to the central vertical axis. The clearance surface, shaped in this way, allows the thread cutting area on the clearance surface to be brought radially very close to an inner surface of the circumferential wall that surrounds the journal and is therefore concave. Preferably, the clearance angle is in the range of greater than 0° to 45°, and even more preferably in the range of greater than 5° to 30°.

[0012] The use according to claim 3 relates to internal thread cutting. In the use according to claim 3, a thread cutting area is used for thread production on a component with at least one annular wall extending axially along a longitudinal axis and a circumferential wall that surrounds the annular wall circumferentially and radially spaced apart, such that a clearance is formed between the circumferential wall and the annular wall, wherein the thread cutting area has a front thread cutting tooth that can be projected axially at least partially for axial penetration into the clearance, such that during axial penetration into the clearance the front thread cutting tooth can be arranged in the circumferential wall for thread cutting and the thread cutting area can be arranged to axially overlap with the annular wall.The circumferential wall therefore has an inner surface on the side of the ring wall into which the front threading tooth cuts an internal thread when axially plunging into the space extending between the ring wall and the circumferential wall. Due to the axially free-projecting front threading tooth, the threading area overlaps axially with the ring wall when plunging into the space; in this plunged state, the ring wall would block radial movement of the threading area away from the inner surface. Consequently, the front threading tooth can cut the thread on the inner surface even within the space. Advantageous embodiments of this use are described in the dependent claims of claim 3, which are freely combinable with one another.The use according to claim 3 discloses an analogous method for internal thread cutting in the circumferential wall on the side of the ring wall in the axial extension area of ​​the ring wall, in which the thread cutting area is plunged axially overlapping with the ring wall into the free space.

[0013] In the use according to claim 3, it is particularly advantageous if the threading area is a monolithic part of a threading insert, wherein the threading insert has a top surface, a bottom surface and a side surface connecting the top surface to the bottom surface, wherein the front threading tooth has a front cutting edge at the transition from the side surface to the top surface, wherein the threading insert extends vertically transversely to the extent of the top surface along a central vertical axis, wherein the front threading tooth extends axially, at least partially, projecting from a clearance surface of the threading insert relative to a planar axial stop surface of the threading insert, and wherein the clearance surface and the stop surface extend continuously from the top surface to the bottom surface in the side surface.wherein the clearance surface extends at a clearance angle relative to the central vertical axis or extends parallel to the central vertical axis, wherein the clearance angle is dimensioned parallel to a normal vector of the stop surface and parallel to the stop surface in the viewing direction, wherein the apex of the clearance angle is located on the underside, and wherein the clearance angle is in the range of greater than 0° to 70°. Due to the clearance surface extended in this manner, the clearance surface is formed as a radial projection in the viewing direction towards the top, extending radially away from the front cutting edge if the clearance surface extends at the clearance angle whose apex is located on the underside, or if the clearance surface is neutral with respect to such a projection.when the clearance surface extends parallel to the central vertical axis. Due to the shape of the clearance surface, the thread cutting area on the clearance surface can be brought radially very close to the outer surface of the ring wall, which is directly opposite the inner surface of the circumferential wall and is therefore convex. The thread cutting insert is preferably made of carbide and is typically reversibly detachable from a tool body. The clearance angle is preferably in the range of greater than 0° to 45°, and even more preferably in the range of greater than 5° to 30°.

[0014] According to a further development of the uses for external and internal thread cutting, or the method for external thread cutting, the leading thread cutting tooth has an axial overhang length that is 5% to 60% of the axial tooth width of the leading thread cutting tooth. When the axial overhang length is 5% to 60% of the axial tooth width of the leading thread cutting tooth, an optimum is achieved between sufficient tooth stability and sufficient penetration depth into the clearance. The axial tooth width and the axial overhang length are dimensioned parallel to the longitudinal axis. Preferably, the axial overhang length is 10% to 50% of the axial tooth width, after which the leading thread cutting tooth cantilevers axially free up to a maximum of the axial center of the leading thread cutting tooth.

[0015] According to a further development of the applications for external and internal thread cutting, or the method for external thread cutting, the front thread cutting tooth is connected to a material web in the area of ​​its axial projection. The material web serves as a foundation for the front thread cutting tooth, which is designed to project freely axially. Typically, the material web is monolithically connected to the front thread cutting tooth, for example, by making the threading area part of a threading insert made of, for example, carbide.

[0016] According to a further development of the applications for external and internal thread cutting, or the method for external thread cutting, the material web has a web height measured along the height extent of the leading thread cutting tooth, which is between 10% and 95% of the height extent. The height extent of the leading thread cutting tooth is measured transversely to the overhang length. When the web height is between 10% and 95% of the height extent, an optimum is achieved between tooth stabilization of the leading thread cutting tooth and a sufficiently small overall dimension of the leading thread cutting tooth and the material web in the radial direction when cutting the lower external thread section, so that it is possible to plunge into correspondingly relatively narrow radial clearances.

[0017] According to a further development of the applications for external and internal thread cutting, or the method for external thread cutting, the thread cutting area has a negative basic shape. This means that the clearance angle associated with the front thread cutting tooth is 0°. As a result, the thread cutting insert is particularly stable and usually has to be held at an angle on a tool holder.

[0018] According to a further development of the applications for internal and external thread cutting, or the method for external thread cutting, an additional thread cutting area is provided, which is designed to be indexable with respect to the thread cutting area. The additional thread cutting area is therefore identical to the thread cutting area, so that identical threads can be produced when the additional thread cutting area is brought into the same position and orientation as the thread cutting area.

[0019] According to a further development of the uses for internal and external thread cutting, or the method for internal thread cutting, the thread cutting area is reversibly and detachably mounted on a base body, so that the thread cutting area can engage with the circumferential wall in the region of the front thread cutting tooth during a radial movement away from the pin. Looking at the thread cutting area, which is arranged for cutting, this creates a gap between the base body and the thread cutting area, with the gap extending radially from below the front thread cutting tooth to the base body.

[0020] According to a further development of the uses for internal and external thread cutting, or the method for external thread cutting, the component is designed as a cable housing component. Here, the advantage of the upper external thread section, which can be produced more efficiently by the axial immersion of the front threading tooth into the free space, is particularly evident. For a cable housing component, it is especially important that it can be screwed flush to the aforementioned other component, so that the assembled cable housing then offers good cable protection against external environmental influences. This requirement is also met by the threading tool according to claim 10.

[0021] The threading tool comprises at least one threading area with a front threading tooth, wherein the threading area is axially cantilevered, at least in the region of this threading tooth. This achieves the advantages described for the threading method analogously. The threading tool can therefore consist of the threading area alone or additionally comprise a base body on which the threading area is mounted.

[0022] According to a further development of the threading tool, the threading area is a monolithic part of a threading insert, wherein the threading insert has a top, a bottom and a side surface connecting the top to the bottom, wherein the front threading tooth has a front cutting edge at the transition from the side surface to the top, wherein the threading insert extends vertically transversely to the extent of the top along a central vertical axis, wherein the front threading tooth extends axially, at least partially, projecting from a clearance surface of the threading insert relative to a planar axial stop surface of the threading insert, and wherein the clearance surface and the stop surface extend continuously from the top to the bottom in the side surface.wherein the clearance area extends at a clearance angle relative to the central vertical axis or parallel to the central vertical axis, wherein the clearance angle is dimensioned parallel to a normal vector of the stop surface and parallel to the stop surface in the viewing direction, wherein the apex of the clearance angle is located on the top side, and wherein the clearance angle is in the range of greater than 0° to 70°. This achieves the same advantages for the threading insert as described for the use of the threading area for external threading, i.e., on the described pin, making it particularly well-suited for external threading. Preferably, the clearance angle is in the range of greater than 0° to 45°, and even more preferably in the range of greater than 5° to 30°.

[0023] According to a further development of the thread cutting tool, the front thread cutting tooth has an axial overhang length which is 5% to 60%, preferably 10% to 50%, of an axial tooth width of the front thread cutting tooth, thus realizing the advantages of the overhang length described in the thread cutting area.

[0024] According to a further development of the threading tool, the front threading tooth is connected to a material rib in the area of ​​the axial overhang. This achieves the same advantages of the material rib described with regard to the use of the threading area.

[0025] According to a further development of the threading tool, the material web has a web height measured along the height of the front threading tooth, which is between 10% and 95% of the height. This achieves the same advantages of the web height described with regard to the use of the threading area.

[0026] Further advantages and expediencies of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures.

[0027] The figures show

[0028] Fig. 1: a perspective view of a thread cutting insert;

[0029] Fig. 2: an enlarged view compared to Fig. 1 of a front

[0030] Thread cutting tooth in top view;

[0031] Fig. 3: A top view of the thread cutting insert according to Fig. 1.

[0032] Top side;

[0033] Fig. 4: a top view of the thread cutting insert according to Fig. 1.

[0034] Bottom;

[0035] Fig. 5: a longitudinal section view of a tenon;

[0036] Fig. 6: a representation of the thread cutting insert according to Fig. 1 in a

[0037] External thread production on the pin shown in the longitudinal section view according to Fig. 5;

[0038] Fig. 7: a perspective view of a thread cutting tool;

[0039] Fig. 8: a top view of another thread cutting insert

[0040] Top side;

[0041] Fig. 9: a side view of the thread cutting insert according to Fig. 1;

[0042] Fig. 10: a representation of yet another thread cutting insert in a

[0043] Internal thread production in a component section view analogous to Fig. 6; Fig. 11: a detail enlarged from Fig. 10.

[0044] With reference to Figures 1 to 6, a use of a thread cutting area 2 and a method for thread production are described.

[0045] When using the threading area 2 or in the method, the threading insert 1 shown in Figures 1 to 4 and 6 and the component 29 shown in Figure 5 are provided. The threading insert 1 represents one embodiment of a threading tool 1; when the threading insert 1 is held on a base body 34 according to Figures 6 and 7, this represents a second embodiment of a threading tool 35.

[0046] Fig. 1 shows a perspective view of the threading insert 1 with its upper surface 5 inclined towards the viewer. The threading insert 1 has a triangular base shape because, with respect to its upper surface 5, it has three threading areas 2 that can be indexed with respect to a 120° rotation. However, it is also conceivable and possible that the threading insert 1 has fewer, for example one, threading area 2, or more, for example six, threading areas 2, in which case the base shape of the threading insert 1 would change accordingly. The upper surface 5 has an inner flat surface 5a.The thread cutting areas 2 each have a front thread cutting tooth 3 with a triangular profile shape; however, it is also conceivable and possible that the thread cutting areas 2 each have one or more rear thread cutting teeth of reduced tooth height behind the front thread cutting tooth 3, particularly if the front thread cutting tooth 3 creates a partial thread profile, which is then cut into a full thread profile by the successive engagement of the subsequently shorter rear thread cutting teeth, or even just one rear thread cutting tooth at a time. Furthermore, it is conceivable and possible that the front thread cutting teeth 3 have a different profile shape, depending on a given thread profile shape, for example, a trapezoidal profile shape in the case of a trapezoidal thread profile shape.The person skilled in the art understands the profile shape of the front thread cutting teeth to be such that a thread can be produced with them in a meaningful way, thus enabling a distinction between threading inserts and inserts for grooving or parting off. Fig. 2 shows a detailed view of one of the front thread cutting teeth 3 as an example, in a top view of the upper surface 5. Fig. 2 thus shows particularly clearly that the front thread cutting tooth 3 cantilevers freely in the axial direction 7, i.e., the direction of a relative axial feed of the threading insert 1 during thread cutting, i.e., thread production, in the area of ​​a front thread flank 8 of the front thread cutting tooth 3, i.e., it is undercut. The front thread cutting tooth 3 has an axial tooth width 9, which is dimensioned parallel to the axial direction 7.The front thread cutting tooth 3 is assigned an axial overhang 11, which is dimensioned parallel to the axial direction 7 and defined with respect to a front free-standing stop surface 12 of the threading insert 1. The axial overhang 11 is, for example, 30% of the axial tooth width 9, for example, in the range of 5% to 60% and also 10% to 50% of the tooth width 9. If the axial overhang 11 is 50% of the axial tooth width 9, the front free-standing stop surface 12, viewed from above the top surface 5, is aligned with the tip 10 of the front thread cutting tooth 3; if the front thread cutting tooth 3 is, for example, trapezoidal, the front free-standing stop surface 12 would be aligned with the center of the corresponding trapezoidal roof line if the overhang 11 is 50% with respect to the axial tooth width 9.The front thread cutting tooth 3 is designed to project axially freely with respect to the front freestanding stop surface 11 and is monolithically connected to the thread cutting area 2, as shown, for example, in Figures 1 and 2.

[0047] Fig. 2 further shows particularly clearly that the front thread cutting tooth 3 has a tooth height 14 that is constant or variable and parallel to a radial direction 13, i.e., the direction of a radial feed. The front thread cutting tooth 3 is, by way of example, connected to a material web 15 over the entire axial projection length 11. The material web 15 stabilizes the front thread cutting tooth 3 and has a web height 16 that is parallel to the radial direction 13. The web height 16 is, by way of example, 33% of the tooth height 14 and thus lies in the range of 10% to 95% of the tooth height 14. The front thread cutting tooth 3 also has a rear thread flank 17. The front thread flank 8 and the rear thread flank 17 are connected to each other by the tip 10. As Fig.As shown in Fig. 1, for example, the front stop surfaces 12 are each created by a relief groove 18, i.e., a groove-shaped opening that extends below the respective front thread cutting tooth 3 from the top surface 5 to the flat bottom surface 19 of the thread cutting insert 1 shown in Fig. 4, thus interrupting the respective side surface 20 of the thread cutting insert 1; following the triangular basic shape, the thread cutting insert 1 has three side surfaces 20 that connect the top surface 5 with the bottom surface 19.

[0048] Fig. 1 further shows that each of the threading areas 2, which are part of the threading insert 1, has a grooved area 21 on the upper surface 5. This groove is concavely curved and thus forms a rake surface 22 on the side of the respective front threading teeth 3 and a rising chip run-off surface 23 connected to the rake surface 22. Fig. 1 also shows that the threading insert 1 has a central through-hole 24. The through-hole 24 extends from the upper surface 5 to the lower surface 19; however, it is conceivable and also possible for the threading insert 1 to be designed without a through-hole 24. Fig. 3 shows the threading insert 1 in a top view of the upper surface 5, analogous to Fig. 2, but more completely, in that all threading areas 3 are shown. Fig. 4 shows the threading insert 1 in a top view of the lower surface 19.The underside 19 is flat and designed to rest on the base of a plate seat. Fig. 5 shows a pin 25 in a longitudinal section. The pin 25 is surrounded by a circumferential wall 26 at a radial distance from it, so that a clearance 27 is formed between the circumferential wall 26 and the pin 25. The pin 25 and the circumferential wall 27 are part of a component 29 that is rotationally symmetrical with respect to a longitudinal axis 28 and are therefore also rotationally symmetrical. The clearance 27 was created by an axial recess in the component parallel to the longitudinal axis 28. The tenon 27 has a lower tenon section 31. The lower tenon section 31 extends within the free space 27 and thus below a flat end face 32 of the circumferential wall 26 on the side of the circumferential wall 26. The tenon 25 also has an upper tenon section 33, which projects out of the free space 27.The upper pin section 31 extends outside the clearance 27 and thus above the flat end face 32 of the circumferential wall 26, the flat end face 32 extending transversely to the longitudinal axis 28. The lower pin section 31 and the upper pin section 33 are each provided without external thread sections in the state shown in Fig. 5. Figures 1 to 4 therefore show the threading insert 1 and thus the threading areas 2 as they are used for thread production or the thread production method, and Fig. 5 shows the component 29 as it is provided for this use and this method.

[0049] Fig. 6 shows the threading insert 1 and thus one of the threading areas 2, with which an external thread section 33a has already been cut in the area of ​​the upper pin section 33, during axial plunge with respect to the longitudinal axis 28 in the area of ​​the front threading tooth 3 into the clearance 27, so that an external thread section 31a is cut on the lower pin section 31, so that the external thread section 33a can be cut "cleanly" to completion, up to the axial position of the end face 32 with respect to the longitudinal axis 28. In other words, the external thread section 33a is cut to completion by the plunge of the front threading tooth 3, because it is designed to project freely axially, whereby the threading continues with the threading area 2 into the clearance 27.The lower pin section 31 is provided with the lower external thread section 31a, wherein the lower external thread section 31a terminates the external thread section 33a at the axial height of the end face 32. Consequently, another component with an internal thread and a bearing surface designed for contacting the end face 32 can be screwed onto it with a particularly high degree of flushness. Otherwise, i.e., without the front thread cutting tooth 3 engaging in the clearance 27, because a collision of the thread cutting insert 1 with the circumferential wall 26 must be avoided at all costs, the...

[0050] The external thread section 33a would end axially just above the clearance 27, so that the external thread section 33a would accordingly end just above the end face 32. The consequence of this would be that the aforementioned additional component could be screwed onto the component 29 with respect to the end face 32 to a significantly lesser extent. In conjunction with Fig. 2, it becomes clear that the front thread flank 8, which is a cutting edge, has been brought into partial thread-cutting contact with the lower pin section 31 by the threading insert 1 being axially immersed in the clearance 27 with respect to the longitudinal axis 28 in the area of ​​the front thread cutting tooth 3. This is possible because the front thread cutting tooth 3, and thus the thread cutting area 2, is designed to project freely axially, by the threading insert 1 being positioned with respect to Fig.The tool has undercuts 18 as described in sections 1 to 4, so that the threading insert 1 can be axially immersed with its end face 32 into the clearance 27 up to a stop of the front freestanding stop surface 12. When producing the external thread sections 31a and 33a with the threading insert 1, the component 29 is rotated relative to the threading insert 1 with respect to the longitudinal axis 28, whereby the threading insert 1 is moved axially along the longitudinal axis 28 relative to the component 29 with a constant or variable radial feed.

[0051] According to Fig. 6, the threading insert 1 is held on a base body 34 in such a way that, during a radial movement away from the component 29, the threading insert 1 would become entangled with the circumferential wall 26 in the area of ​​the engaged front threading tooth 3 if the front threading tooth 3 were to enter the clearance 27 as shown in Fig. 6. The threading insert 1 and the base body 32 form a threading tool 35, which is shown sectionally on the side of the base body 34 in Fig. 6 and completely in a perspective view in Fig. 7; the threading insert 1 rests with its underside 19 on a plate seat 36 of the base body 34. The base body 34 extends transversely to the axial tooth width 9 of the actively arranged front threading tooth 3 shown in Fig. 2, i.e., the one shown in Fig.6 is used or can be used for thread cutting, longitudinally extended; however, another shape and / or extension of the base body 34 is conceivable and also possible.

[0052] Fig. 8 shows another threading insert 37 in a top view analogous to Fig. 3. The further threading insert 37 is designed analogously to the threading insert 1 and can therefore produce the external thread sections 31a and 33a shown in Fig. 6 in the same way. Therefore, elements that are identical, similar, or have the same effect compared to the threading insert 1 are designated with identical reference numerals, and a repeated description of these elements is avoided in the following description to prevent redundancy. In contrast to the threading insert 1, the front threading teeth 3 of the threading insert 37 are not axially cantilevered by a relief groove 18. The front threading teeth 3 can thus penetrate deeper into the journal 25 in the radial direction during thread cutting. Furthermore, unlike the threading insert 1, the threading insert 37 has a larger web width 16, which is approximately 90% of that shown in Fig.The tooth height 14 shown in Figure 2 is the sum of the two tooth heights. In summary, Figure 6 shows the use of the threading area 2 for thread production and a method for thread production, Figures 1 to 4 show a threading tool in the form of a threading insert 1, and Figures 6 and 7 show a threading tool 36 comprising the threading insert 1 and the base body 34. In the use and the method, the additional threading insert 37 shown in Figure 8 can be used analogously instead of the threading insert 1 and held analogously on the base body 34.

[0053] The use of the threading area 2 relates to thread production on the component 29 with at least one pin 25 extending axially along the longitudinal axis 28 and the circumferential wall 26, which surrounds the pin 25 circumferentially and radially spaced, so that a clearance 27 is formed between the circumferential wall 26 and the pin 25 and the pin 25 projects axially out of the clearance 27, wherein the threading area 2 has the front threading tooth 3, which cantilevers axially at least partially, for axial insertion into the clearance 27. This insertion produces the lower external thread section 31a, so that the upper external thread section 33a, which is usually also formed by the front

[0054] The thread cutting tooth 3, when produced in this application, terminates at the axial height of the face 32 without the thread cutting area 2, and thus the thread cutting insert 1, colliding with the circumferential wall 26. The thread production method comprises at least the following steps: providing the component 29 with at least the pin 25 extending axially along the longitudinal axis 28 and the circumferential wall 26, which surrounds the pin 25 circumferentially and radially spaced, such that the clearance 27 is formed between the circumferential wall 26 and the pin 25, and the pin 25 projects axially out of the clearance 27;

[0055] Providing the threading area 2, which has a front threading tooth 3 that projects axially freely at least partially; cutting the upper external thread section 33a located outside the clearance 27 on the pin 25 with the threading area 2; cutting a lower external thread section 31a connected to the (upper) external thread section 33a on the pin 25 with the threading area 2 by axially plunging the front threading tooth 3 at least partially into the clearance 27. Fig. 9 shows the threading insert 1 in a side view parallel to a normal vector 12a of the stop surface 12 shown in Fig. 1; the stop surface 12 is planar.The threading insert 1 has the aforementioned top surface 5, the aforementioned bottom surface 19, and the aforementioned side surface 20, which connects the top surface 5 to the bottom surface 19. The front threading tooth 3 has the thread flank 8 shown in Fig. 2, which is a (front) cutting edge formed at the transition from the side surface 20 to the top surface 5. The threading insert 1 extends vertically transversely to the extent of the top surface 5 along a central vertical axis 100. The central vertical axis 100 is a central longitudinal axis of the through-hole 24 and is oriented perpendicular to the surface 5a. The front threading tooth 3 extends axially, at least partially, beyond the stop surface 12 of the threading insert 1, forming a clearance surface 200, which is clearly visible in Fig. 1.The clearance surface 200 and the stop surface 12 extend continuously from the top 5 to the bottom 19 in the side surface 20, as shown, for example, in Fig. 9. The clearance surface 200 extends at a clearance angle 210 relative to the central vertical axis 100. The clearance angle 210 is dimensioned parallel to the normal vector 12a of the stop surface 12 in the viewing direction and relative to the stop surface 12 in the viewing direction, as shown in Fig. 9. The apex 220 of the clearance angle 210 is located on the side of the top 5. The clearance angle 210 is, for example, 20°, which lies in the range from greater than 0° to 70°. The clearance surface 200 extends along a clearance axis 230, which consequently forms one leg of the clearance angle 210. The other leg of the clearance angle 210 is formed by the central vertical axis 100.If the clearance angle is 210 0°, the clearance area is 200 parallel to the.

[0056] The central vertical axis 100 extends. The undercut 18, which forms the clearance surface 200, extends along an undercut axis 180 parallel to the clearance axis 230. The front thread cutting tooth 3 is radially undercut by the clearance surface 200, as is particularly evident in Fig. 9. By means of the clearance angle 210 shown in Fig. 9, the clearance surface 200 can be moved radially, particularly close to the circumferential wall 26, which is concave on the side of the pin 25. Fig. 10 and Fig. 11 show in a longitudinal section through a component 400 analogous to Fig. 6 a further thread cutting insert 300, which is designed analogously to the thread cutting insert 1, except that the clearance surface 200 and thus the undercut 18 are extended with respect to the representation in Fig. 9 such that the tip 220 of the clearance angle 210 is arranged on the side of the underside 19.This can be seen from the fact that the clearance surface 200 forms a radial projection in the direction of view towards the top surface 5, as shown in detail in Fig. 11 with respect to Fig. 10, so that in this case, the clearance surface 200, when moved radially, is guided particularly close to the ring wall 420, which is convex on the side of the clearance surface 200. Figs. 10 and 11 show the use of the thread cutting insert 300 for thread production on the component 400 with at least one ring wall 420 extending axially along a longitudinal axis 410 and a circumferential wall 430 that surrounds the ring wall 420 circumferentially and radially spaced, so that a clearance 440 is formed between the circumferential wall 430 and the ring wall 420. When the thread cutting area 3 is axially plunged into the clearance 440, the front thread cutting tooth 3 is arranged for thread cutting in the circumferential wall 430.The thread cutting area 2 is arranged axially overlapping with the ring wall 420, as shown in detail in Fig. 11. The thread cutting area 2 of the thread cutting inserts 1, 37, and 300 each has a negative basic shape, such that the thread flank 8, which is a cutting edge, is assigned a clearance angle of 0°. The thread cutting inserts 1 and 37 may have a different basic shape and / or indexing, including no indexing, and may also be designed without a material web 15, and are preferably made of a hard metal. The front thread cutting teeth 3 may have a different shape and / or axial overhang 11. The component 29, and thus the pin 25 and the circumferential wall 26, may have relative dimensions other than those shown in Figures 5 and 6. The clearance 27 may extend deeper or shallower and / or have a different shape.Component 29 and / or component 400 is preferably made of a metal alloy, in particular steel. Preferably, component 29, as shown in the longitudinal section in Fig. 5, has a through-hole for internal cable guidance extending with respect to and along the longitudinal axis 28, thus extending along and inside the pin 25, thereby providing, by way of example, a cable housing component.

Claims

REQUIREMENTS 1. Use of a thread cutting area for thread production on a component (29) with at least one pin (25) extending axially along a longitudinal axis (28) and a circumferential wall (26) that surrounds the pin (25) circumferentially and radially spaced, so that a clearance (27) is formed between the circumferential wall (26) and the pin (25) and the pin (25) projects axially out of the clearance (27), wherein the thread cutting area (2) has a front thread cutting tooth (3) that cantilevers axially at least in sections for axial insertion into the clearance (27).

2. Method for thread production, comprising at least the following steps: providing a component (29) with at least one pin (25) extending axially along a longitudinal axis (28) and a circumferential wall (26) that surrounds the pin (25) circumferentially and radially spaced apart, such that a clearance (27) is formed between the circumferential wall (26) and the pin (25) and the pin (25) projects axially out of the clearance (27); providing a thread cutting area (2) having a front thread cutting tooth (3) that projects axially freely at least in sections; cutting an upper external thread section (33a) located outside the clearance (27) on the pin (25) with the thread cutting area (2);Cutting a lower external thread section (31a) connected to the upper external thread section (31a) on the pin (25) with the thread cutting area (2) by immersing the front thread cutting tooth (3) axially, at least section by section, into the clearance (27) in a thread cutting manner.

3. Use of a thread cutting area for thread production on a component (400) with at least one annular wall (420) extending axially along a longitudinal axis (410) and a circumferential wall (430) that surrounds the annular wall (420) circumferentially and radially spaced, such that a clearance (440) is formed between the circumferential wall (430) and the annular wall (420), wherein the thread cutting area (2) has a front thread cutting tooth (3) that cantilevers axially at least partially for axial penetration into the clearance (440), such that upon axial penetration into the clearance (440) the front thread cutting tooth (3) can be arranged for thread cutting in the circumferential wall (430) and the thread cutting area (2) can be arranged axially overlapping with the ring wall (420).

4. Use according to claim 1 or method according to claim 2, wherein the threading area (2) is a monolithic part of a threading insert (1), wherein the threading insert (1) has a top surface (5), a bottom surface (19) and a side surface (20) connecting the top surface (19) to the bottom surface, wherein the front threading tooth (2) has a front cutting edge (8) at the transition from the side surface (20) to the top surface (8), wherein the threading insert (1) extends vertically transversely to the extent of the top surface (5) along a central vertical axis (100), wherein the front threading tooth (3) extends axially, at least partially, projecting from a flat axial stop surface (12) of the threading insert (1), forming a clearance surface (200) of the threading insert (1).wherein the clearance surface (200) and the stop surface (12) extend continuously from the top (5) to the bottom (19) in the side surface (20), wherein the clearance surface (200) extends at a clearance angle (210) relative to the central vertical axis (100) or parallel to the central vertical axis (100), wherein the clearance angle (210) is dimensioned parallel to a normal vector (12a) of the stop surface (12) in the viewing direction and towards the stop surface (12), wherein the apex (220) of the clearance angle (210) is located on the side of the top (5), and wherein the clearance angle (210) is in the range of greater than 0° to 70°.

5. Use according to claim 3, wherein the threading area (2) is a monolithic part of a threading insert (300), wherein the threading insert (300) has a top surface (5), a bottom surface (19) and a side surface (20) connecting the top surface (19) to the bottom surface, wherein the front threading tooth (2) has a front cutting edge (8) at the transition from the side surface (20) to the top surface (8), wherein the threading insert (300) extends vertically transversely to the extent of the top surface (5) along a central vertical axis (100), wherein the front threading tooth (3) forms a clearance surface (200) of the The threading insert (300) extends axially, at least partially, relative to a planar axial stop surface (12) of the threading insert (300), wherein the clearance surface (200) and the stop surface (12) extend continuously from the top (5) to the bottom (19) in the side surface (20), wherein the clearance surface (200) extends at a clearance angle (210) relative to the central vertical axis (100) or parallel to the central vertical axis (100), wherein the clearance angle (210) is dimensioned parallel along a normal vector (12a) of the stop surface (12) in the viewing direction and towards the stop surface (12), wherein the apex (220) of the clearance angle (210) is arranged on the side of the bottom (19), and wherein the clearance angle (210) is in the range of greater than 0° to 70°.

6. Use according to claim 1 or 3 to 5 or method according to claim 2 or 4, wherein the front thread cutting tooth (3) has an axial overhang length (11) which is 5% to 60% of an axial tooth width (9) of the front thread cutting tooth (3).

7. Use or method according to claim 6, wherein the front thread cutting tooth (3) is connected to a material web (15) in the region of the axial overhang length (11).

8. Use or method according to claim 7, wherein the material web (15) has a web height (16) measured along the height extent (14) of the front thread cutting tooth (2) which is 10% to 95% of the height extent (14).

9. Use according to any one of claims 1 or 3 to 8 or method according to any one of claims 2, 4, 6 to 8, wherein the thread cutting area (2) has a negative basic shape.

10. Thread cutting tool comprising at least one thread cutting area (2) with a front thread cutting tooth (3), wherein the thread cutting area (2) is designed to project axially freely at least in the area of ​​this thread cutting tooth (3).

11. Thread cutting tool according to claim 10, wherein the thread cutting area (2) is a monolithic part of a thread cutting insert (1), wherein the Thread cutting insert (1) a top (5), a bottom (19) and a a side surface (20) connecting the top surface (19) to the bottom surface, wherein the front threading tooth (2) has a front cutting edge (8) at the transition from the side surface (20) to the top surface (8), wherein the threading insert (1) extends vertically transversely to the extent of the top surface (5) along a central vertical axis (100), wherein the front threading tooth (3) extends axially, at least partially, projecting from a flat axial stop surface (12) of the threading insert (1), forming a clearance surface (200) of the threading insert (1), wherein the The clearance surface (200) and the stop surface (12) extend continuously from the top (5) to the bottom (19) in the side surface (20), wherein the clearance surface (200) extends at a clearance angle (210) relative to the central vertical axis (100) or parallel to the central vertical axis (100), wherein the clearance angle (210) is dimensioned parallel to a normal vector (12a) of the stop surface (12) in the viewing direction and towards the stop surface (12), wherein the apex (220) of the clearance angle (210) is arranged on the side of the top (5), wherein the clearance angle (210) is in The range is from greater than 0° to 70°.

12. Thread cutting tool according to claim 11, wherein the thread cutting insert (1) has a negative basic shape.

13. Thread cutting tool according to claim 12, wherein the front thread cutting tooth (3) is connected to a material web (15) in the region of the axial overhang length (11).

14. Thread cutting tool according to claim 13, wherein the material web (15) has a web height (16) measured along the height extent (14) of the front thread cutting tooth (3) which is 10% to 95% of the height extent (14).

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