Deforming method and deforming machine for forming helical tooth rows on cylindrical workpieces by impact extrusion

Abstract

To enable manufacture of components having high-quality helical toothings.SOLUTION: Within a framework of a deformation processing method for producing a helical toothing of a cylindrical workpiece by impact extrusion, a relative movement of a deformation processing tool (3) and a workpiece blank (4) performed in a circumferential direction (7) of the deformation processing tool (3) and the workpiece blank (4) is superimposed on an axial deformation processing movement of the deformation processing tool (3) and the workpiece blank (4). Based on a deformation processing relative movement of the deformation processing tool (3) and the workpiece blank (4) resulting from the mutual superimposition of the axial deformation processing movement and the circumferential deformation processing movement, the helical toothing of the workpiece is produced on the workpiece blank (4) because a shaping helical toothing (16) of the deformation processing tool (3) locks into the workpiece blank (4) during the resulting deformation processing relative movement. A deformation processing machine (1) is configured to practice the method.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a deformation process for forming helical tooth rows on cylindrical workpieces by impact extrusion, A forming tool with a shaping helical tooth arrangement and a cylindrical workpiece blank are moved axially relative to each other in an axial forming movement, and The present invention relates to a deformation processing method in which, based on the axial deformation processing movement of a deformation processing tool and a work blank, the helical tooth row formed by the deformation processing tool engages with the work blank during the axial deformation processing movement of the deformation processing tool and the work blank, thereby forming the helical tooth row of the work in the work blank.

[0002] The invention further relates to a deformation machine for carrying out the above-mentioned method and to a computer program for controlling the deformation machine when carrying out the method.

[0003] Components with helical toothing are used in a variety of ways. For example, in drive technology, gears with helical teeth or drive shafts with shaft sections with helical teeth on the outside or inside are commonly used. Depending on the specific application, different toothing geometries are prescribed.

[0004] The so-called "Samanta process" is known from the prior art mentioned at the outset. The Samanta process is used to manufacture gears with helical teeth. In this process, gear blanks are extruded in succession with a linear axial movement through a die with a forming internal helical toothing. However, the teeth formed by the Samanta process often require post-processing because the toothing quality is not sufficient for the respective application.

[0005] The object of the present invention is to make it possible to manufacture components with high-quality helical toothing.

[0006] According to the invention, this object is achieved by a forming method according to claim 1, a forming machine according to claim 8 and a computer program according to claim 15.

[0007] In the present invention, a deformation movement in which the deforming tool with the shaping teeth and the workpiece blank to be machined are moved axially relative to each other is superimposed with a deformation movement performed by the deforming tool and the workpiece blank relative to each other in the circumferential direction. The parameters of the deformation process, such as the speed at which the relative movement of the deforming tool and the workpiece blank, which is brought about by the feed drive and the rotary drive of the deforming machine according to the present invention, should be coordinated with each other, can be determined empirically depending on the specific application. The process parameters to be defined are influenced, for example, by the material properties of the workpiece blank to be deformed and the geometry of the helical toothing to be formed. The relative axial speeds and the speed ratios between the deforming tool and the workpiece blank and the circumferential speeds can also be calculated based on the inclination angles of the helical toothing to be formed and the workpiece-side helical toothing.

[0008] The forming method according to the invention and the forming device according to the invention allow the high-quality production of various tooth geometries by impact extrusion. Involute toothing on gear wheels, for example, can be produced with high quality, as can serrations for form-locking shaft-hub connections.

[0009] Conventional controllable drive designs are conceivable for the feed and rotary drives of the forming machine according to the invention.

[0010] The direction of movement of the forming tool and the workpiece blank resulting from the axial and circumferential movements can be reversed during and after the forming process, for this reason the forming method according to the invention and the forming machine according to the invention are also suitable for forming external helical toothing, for example on stepped shafts.

[0011] The computer program according to the invention is useful for the numerical control of the deformation machine according to the invention when carrying out the deformation method according to the invention.

[0012] Specific embodiments of the deformation processing method according to the present invention as set forth in claim 1, the deformation processing machine according to the present invention as set forth in claim 8 and the computer program according to the present invention as set forth in claim 15 are set forth in dependent claims 2 to 7 and dependent claims 9 to 14, respectively.

[0013] Claims 2 and 9 relate to variants of the inventive forming method and forming machine, which are distinguished by particularly high processing quality. In so-called "recursive" forming processes of the inventive type, the helical teeth on the workpiece are formed partially over the forming length. The forming movement performed by the forming tool and the workpiece blank relative to one another is followed by a return stroke, in which the forming tool and the workpiece blank are moved relative to one another in a direction opposite to the direction of the preceding forming movement, so that the forming teeth are positioned in the already deformed area of ​​the workpiece blank. This is followed by another relative forming movement of the forming tool and the workpiece blank. The basic function of recursive axial forming is described, for example, in German Patent No. 10 2006 037 091.

[0014] In an advantageous embodiment of the invention, as set forth in claims 3 and 10, the workpiece blank to be deformed and the forming die with the forming inner toothing, which is fitted onto the workpiece blank, are simultaneously moved axially and circumferentially relative to one another to form the outer helical toothing.

[0015] According to claims 4 and 11, in another advantageous embodiment of the present invention, to form the internal helical toothing, the workpiece blank to be deformed and a forming mandrel with helical toothing on its outer surface, which advances axially into the cylindrical opening of the workpiece blank, are moved relative to one another in an axial direction and a circumferential direction superimposed on the axial movement. The workpiece blank to be processed may be, for example, a hollow cylindrical shaft blank for a hollow shaft with internal helical toothing. Due to the possibility afforded by the present invention of reversing the direction of the resulting deforming movement of the forming tool and the workpiece blank, the method and the forming machine according to the present invention also make it possible to form helical toothing on the axial wall of a cylindrical blind hole. After the wall toothing is completed, the deforming mandrel is removed from the inside of the blind hole by reversing the direction of movement.

[0016] In order to generate a circumferentially extending component of the resulting relative deformation movement between the deformation tool and the workpiece blank to be deformed, the present invention provides a variety of different possibilities which may be realized alternatively or together in the present invention.

[0017] According to claims 5 and 12, one of the forming partners of the forming tool and the workpiece blank is freely rotatable in the circumferential direction, while the other forming partner is fixed and prevented from rotating in the circumferential direction. The circumferential forming movement of the forming tool and the workpiece blank is brought about by the axial forming movement of the forming tool and the workpiece blank in accordance with the corresponding dimensioning of the inclination angle of the forming helical tooth row on the forming tool. In this case, the forming tool together with the feed drive forms the rotary drive of the forming machine according to the invention.

[0018] The inclination angle of the helical teeth on the workpiece to be produced, and thus also of the forming helical teeth on the forming tool, is defined for a specific application. If a specific application allows for play in determining the inclination angle, a value can be selected for the inclination angle of the forming helical teeth on the forming tool that is particularly suitable for carrying out the method according to claim 5. Factors that influence the suitability of the inclination angle of the forming helical teeth for carrying out the method according to claim 5 are, for example, the material pairing between the forming helical teeth and the workpiece blank and the resulting friction ratio at the contact surface between the forming helical teeth and the workpiece blank.

[0019] As set forth in claims 6 and 13, the circumferentially extending component of the resulting relative deformation movement between the deforming tool and the workpiece blank is generated by a motor drive of at least one of the deforming partners. Electric and hydraulic drives are particularly conceivable according to the invention. Alternatively, however, a mechanical coupling of the axial relative movement between the deforming tool and the workpiece blank with the relative movement performed in the circumferential direction between the deforming tool and the workpiece blank is also conceivable.

[0020] In the method according to claim 7 and the forming machine according to claim 14, the circumferential deformation movement of the forming tool and the workpiece blank can be optionally triggered based on a corresponding dimensioning of the inclination angle of the forming helical teeth on the forming tool, or additionally by a motor drive of at least one of the forming partners. For this purpose, the rotational state of the forming partner capable of rotating in the circumferential direction is monitored. For example, if the relative circumferential movement of the forming tool and the workpiece blank to be deformed is triggered firstly based on the relative axial movement of the forming partners and then based on a corresponding dimensioning of the inclination angle of the forming helical teeth on the forming tool, then, if it is determined during monitoring of the rotational state of the rotating forming partner that the rotational movement of the rotating forming partner has slowed down significantly or even stopped completely, then the motor drive of the drivable forming partner can be switched on, for example. When forming an external helical tooth row in a workpiece using a forming die fitted over the workpiece, such a delay or pause in the rotational movement of the rotationally movable forming partner can be due to, for example, an expansion of the outer diameter of the workpiece blank that occurs due to manufacturing errors.

[0021] In the following, the invention will be explained in more detail on the basis of exemplary schematic drawings. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 10 is a diagram showing a deformation processing machine for forming an outer helical tooth row of a cylindrical workpiece. [Figure 2] 2 shows a tool unit of a first construction type with a forming die for the forming machine shown in FIG. 1; FIG. [Figure 3] 2 shows a tool unit of a second construction type with a forming die for the forming machine shown in FIG. 1; FIG. [Figure 4a] 2 is a highly schematic view of the formation of an outer helical tooth row by the forming machine shown in FIG. 1; FIG. [Figure 4b]2 is a highly schematic view of the formation of an outer helical tooth row by the forming machine shown in FIG. 1; FIG. [Figure 5a] 2 is a highly schematic view showing the formation of an internal helical tooth row by the forming machine shown in FIG. 1; FIG. [Figure 5b] 2 is a highly schematic view showing the formation of an internal helical tooth row by the forming machine shown in FIG. 1; FIG.

[0023] According to Fig. 1, the forming machine 1 has a forming drive 2, by means of which a forming die 3 can be moved in a forming movement relative to a workpiece blank 4. In the example shown, the workpiece blank 4 is a hollow shaft blank made of steel for producing drive shafts for automobiles. The workpiece blank 4 is clamped by a chuck unit 5 of the forming machine 1, so that its position is immutable axially along axis 6 and in the circumferential direction 7.

[0024] The forming drive 2 of the forming machine 1 comprises a feed drive 8 and a rotary drive 9, which is shown very diagrammatically in Fig. 1. The feed drive 8 comprises a piston-cylinder unit 10 and a frequency generator 11, which is arranged between a piston rod 12 of the piston-cylinder unit 10 and the rotary drive 9.

[0025] For the rotary drive 9, two drive configurations are conceivable (FIGS. 2 and 3).

[0026] In the case of the rotary drive 9 / 1 (FIG. 2), the tool support 14 with the forming die 3 can rotate freely about the axis 6. In contrast, in the case of the rotary drive 9 / 2 (FIG. 3) for the tool support 14 with the forming die 3, a rotary drive motor 15 is provided, which can controllably change the direction of rotation of the rotary drive, and which is drivingly connected to the tool support 14 by a clutch (not shown).

[0027] As can be seen in Figures 2, 3 and 4a, the forming die 3 has inner helical teeth 16 which form or shape the die.

[0028] The inner helical teeth 16 formed by the forming die 3 form an outer helical teeth 21 in the workpiece blank 4 (FIG. 4b).

[0029] For this purpose, starting from the state shown in FIG. 1 , the forming die 3 is moved along the axis 6 toward the right in the drawing by the piston-cylinder unit 10 of the feed drive 8 until the calibration section 17 of the inner helical tooth row 16 of the forming die 3 strikes the edge of the workpiece blank 4 on the left side in the drawing. The axial forming movement of the forming die 3 relative to the workpiece blank 4 then begins. In this case, an oscillatory movement of the forming die 3 along the axis 6 is superimposed by the frequency generator 11 on the axial feed movement of the forming die 3 caused by the piston-cylinder unit 10. The resulting axial forming movement of the forming die 3 is then superimposed on a forming movement of the forming die 3, which is performed in the circumferential direction 7 relative to the workpiece blank 4 and is fitted over the workpiece blank 4.

[0030] The deformation movement of the forming die 3 in the circumferential direction 7 is brought about when the rotary drive 9 / 1 is used by driving the freely rotatably mounted forming die 3 in a rotational movement relative to the workpiece blank 4 in the circumferential direction 7 on the basis of the axial deformation movement of the forming die 3 and the workpiece blank 4. In this case, the forming die 3 therefore forms part of the rotary drive 9 / 1.

[0031] This possibility of generating a component extending in the circumferential direction 7 of the resulting deformation movement of the forming die 3 relative to the workpiece blank 4 arises because the inclination angle β of the forming inner helical tooth row 16 of the forming die 3 is correspondingly dimensioned, which corresponds to the inclination angle of the helical tooth row on the workpiece side to be formed, as shown in Figure 4a.

[0032] The overall deformation motion of the deformation die 3 relative to the work blank 4 occurs as a result of segmental movements.

[0033] Between each of the two deformation movements performed by the forming die 3 in the axial direction 6 and the circumferential direction 7 relative to the workpiece blank 4, due to the oscillatory movement of the forming die 3 caused by the frequency generator 11, a return stroke of the forming die 3 is performed. During this return stroke, the forming die 3 is returned relative to the workpiece blank 4 in a direction opposite to that of the preceding deformation movement, to an area of ​​the workpiece blank 4 that has already been deformed. The deformation of the workpiece blank 4 is therefore intermittent. Each return stroke of the forming die 3 also has an axial component 6 and a circumferential component 7.

[0034] When the rotary drive 9 / 1 is used, the movement of the forming die 3 in the circumferential direction 7 is caused both during the forming movement of the forming die 3 and during the return stroke due to the cooperation of the axial die movement of the forming die 3 and the inclination angle β of the forming inner tooth row 16.

[0035] Alternatively, when using the rotary drive 9 / 2, the movement performed by the forming die 3 in the circumferential direction 7 relative to the workpiece blank 4 can also be brought about by the rotary drive motor 15, which can act on the tool support 14 in different rotational directions via a clutch arranged between the rotary drive motor 15 and the tool support 14.

[0036] The described flow in the deformation machine 1 is controlled by a numerically controlled machine controller 18 shown in FIG.

[0037] When the rotary drive 9 / 1 is used, the numerically controlled machine control device 18 is limited to controlling the feed drive 8 during the deformation of the workpiece blank 4. The above-mentioned movement of the die 3 in the circumferential direction 7 is automatically superimposed on the axial movement of the forming die 3, which is caused by the feed drive 8, based on the axial movement of the forming die 3 and the corresponding dimensioning of the inclination angle β of the inner helical tooth row 16 of the forming die 3.

[0038] In combination with the rotary drive 9 / 2, the numerically controlled machine control device 18 can also control the movement performed by the deforming die 3 relative to the workpiece blank 4 in the circumferential direction 7 by corresponding control of the rotary drive motor 15.

[0039] In this case, two different operating modes are conceivable for the rotary drive 9 / 2.

[0040] For this purpose, the state of rotational movement of the forming die 3 is detected by a detection unit 19 of a numerically controlled machine control device 18 .

[0041] When the rotary drive motor 15 is stopped and therefore the deformation die 3 can rotate freely in the circumferential direction 7 under the action of its axial movement, the rotary drive motor 15 remains switched off when the detection unit 19 confirms that the deformation die 3 is automatically rotating in the circumferential direction 7 relative to the work blank 4.

[0042] However, if the detection unit 19 of the numerically controlled machine control device 18 determines that the deforming die 3, decoupled from the rotary drive motor 15, does not move in the circumferential direction 7 or does not move in the circumferential direction 7 at the required speed, the numerically controlled machine control device 18 generates a control signal for the rotary drive motor 15, and based on this control signal, causes the rotary drive motor 15 to operate in the required rotational direction, and then actively generates the component of the deforming movement of the deforming die 3 or the return stroke of the deforming die 3 that extends in the circumferential direction 7.

[0043] Figure 4a shows the state of the workpiece blank 4 during deformation, just before the forming inner teeth 16 of the deformation die 3 impact the workpiece blank 4 along the axis 6. Figure 4b shows the state immediately after the deformation process is completed, where the workpiece blank 4 is provided with the desired outer helical teeth 21 over the desired deformation length.

[0044] 5a and 5b show an example of use in which the forming machine 1 forms an internal helical tooth row 24 in the wall 22 of a cylindrical opening 23 in a work blank 4. FIG.

[0045] In this case, a forming mandrel 25 with an outer helical tooth row 26 serves as the forming tool.

[0046] Corresponding to the above-described flow, the feed drive 8 and the rotary drive 9 of the forming machine 1 cause, on the one hand, an axial forming movement of the forming mandrel 25 along the axis 6 and, further, a forming movement of the forming mandrel 25 in the circumferential direction 7, which is superimposed on the axial forming movement. The two forming movements are superimposed on one another, causing a resulting forming movement of the forming mandrel 25 relative to the workpiece blank 4 in the manner described.

[0047] In the illustrated example, the cylindrical opening 23 in the work blank 4 is formed as a blind hole.

[0048] After the workpiece blank 4 has been deformed (FIG. 5b), the deforming mandrel 25 is moved out of the interior of the opening 23, now provided with an internal helical toothing 24, by reversing the direction of its movement along the axis 6 and in the circumferential direction 7.

Claims

1. A deformation processing method for forming helical tooth rows (21, 24) on a cylindrical workpiece by impact extrusion, comprising: A forming tool (3, 25) with a shaping helical tooth arrangement (16, 26) and a cylindrical workpiece blank (4) are moved axially (6) relative to each other in an axial forming movement; a forming method in which, based on the axial forming movement of the forming tool (3, 25) and the workpiece blank (4), the forming helical tooth sequence (16, 26) of the forming tool (3, 25) engages in the workpiece blank (4) during the axial forming movement of the forming tool (3, 25) and the workpiece blank (4), thereby forming the helical tooth sequence (21, 24) of the workpiece in the workpiece blank (4), the resulting relative deformation movement of the deforming tool (3, 25) and the work blank (4) is divided into resulting partial deformation movements of the deforming tool (3, 25) and the work blank (4), thereby forming the helical tooth row (21, 24) in the work blank (4) over the deformation length, each of the resulting deformation part movements is based on the superposition of an axial deformation movement of the deformation tool (3, 25) and the work blank (4) and a circumferential deformation movement of the deformation tool (3, 25) and the work blank (4), the deformation movement of the deforming tool (3, 25) and the workpiece blank (4) in the circumferential direction is carried out as a relative movement of the deforming tool (3, 25) and the workpiece blank (4) in the circumferential direction (7) of the deforming tool (3, 25) and the workpiece blank (4), - based on the resulting respective partial deformation movements of the deforming tool (3, 25) and the work blank (4), the forming helical tooth rows (16, 26) of the deforming tool (3, 25) engage in the work blank (4) during the resulting partial deformation movements of the deforming tool (3, 25) and the work blank (4), thereby forming in the work blank (4) a section of the helical tooth rows (21, 24) of the workpiece; a deformation process characterized in that the deforming tool (3, 25) and the workpiece blank (4) are moved relative to each other between two successive deformation part movements with return stroke movements carried out in the opposite direction to the resulting deformation part movements, each of which also has a component in the axial direction (6) and a component in the circumferential direction (7).

2. A deformation processing method for forming an outer helical tooth row (21) of the cylindrical workpiece, using a deforming die with a shaping internal helical toothing (16) as the deforming tool (3), which is fitted onto the work blank (4) during the resulting deforming part movement of the deforming die and the work blank (4); 2. The method according to claim 1, wherein, based on the resulting deformation-part movement of the deformation die and the workpiece blank (4), the forming inner helical tooth row (16) of the deformation die engages in the workpiece blank (4) during the resulting deformation-part movement of the deformation die and the workpiece blank (4), thereby forming in the workpiece blank (4) a section of the outer helical tooth row (21) of the workpiece.

3. A deformation processing method for forming an inner helical tooth row (24) on a wall (22) of a cylindrical opening (23) extending in the axial direction of the workpiece, comprising: the use of a deforming mandrel with a shaping external helical tooth row (26) as a deforming tool (25), which penetrates axially into the cylindrical opening (23) of the work blank (4) during the resulting deforming part movement of the deforming mandrel (25) and the work blank (4); 2. The method according to claim 1, wherein, based on the resulting deformation-part movement of the deforming mandrel and the work blank (4), the forming outer helical tooth row (26) of the deforming mandrel engages in the work blank (4) during the resulting deformation-part movement of the deforming mandrel and the work blank (4), thereby forming in the work blank (4) a section of the inner helical tooth row (24) of the workpiece.

4. the deforming tool (3, 25) and the work blank (4) form a deforming partner, and The deformation movement of the deformation tool (3, 25) and the workpiece blank (4) in the circumferential direction (7) is - a freely rotatable support of one of the deforming partners of the deforming tool (3, 25) and the workpiece blank (4) in the circumferential direction (7); - holding the other forming partner in a rotation-proof manner in the circumferential direction (7), and - by driving the freely rotatably mounted forming partner with a circumferential (7) rotational movement relative to the other forming partner, based on the corresponding dimensioning of the inclination angle (β) of the forming helical tooth rows (16, 26) of the forming tool (3, 25) and based on the axial forming movement of the forming tool (3, 25) and the workpiece blank (4), 4. The method according to claim 1, wherein the deformation is caused by the step of:

5. the deforming tool (3, 25) and the work blank (4) form a deforming partner, and 4. A method according to claim 1, wherein at least one of the deforming partners is motor-driven in the circumferential direction (7) relative to the other deforming partner, thereby causing a deforming movement of the deforming tool (3, 25) and the work blank (4) in the circumferential direction (7).

6. the deforming tool (3, 25) and the work blank (4) form a deforming partner, one of the forming partners is configured as a forming partner capable of rotational movement in the circumferential direction (7), which is selectively supported so as to be freely rotatable in the circumferential direction (7) or is motor-driven in the circumferential direction (7); - holding the other deformation partner in a rotation-proof manner in the circumferential direction (7), monitoring the rotational movement conditions occurring in the circumferential direction (7) of the rotationally movable deforming partner during the axial deforming movement of the deforming tool (3, 25) and the workpiece blank (4); and - controlling the deformation movement of the deformation tool (3, 25) and the workpiece blank (4) in the circumferential direction (7) depending on the monitored rotational movement state of the rotationally movable deformation partner, - depending on the dimensioning of the inclination angle of the forming helical tooth row (16, 26) of the forming tool (3, 25) and on the basis of the axial forming movement of the forming tool (3, 25) and the workpiece blank (4), the rotating forming partner is driven as a freely rotatably mounted forming partner with a circumferential (7) rotational movement that is performed relative to the other forming partner, or - by motor driving the rotationally movable forming partner in the circumferential direction (7) relative to the other forming partner, 4. The method according to claim 1, wherein the deformation is caused by the step of:

7. A deformation processing machine for forming helical tooth rows (21, 24) of a cylindrical workpiece by impact extrusion, a forming tool (3, 25) with a shaping helical tooth row (16, 26); a feed drive (8) by means of which the deforming tool (3, 25) and a cylindrical workpiece blank (4) can be moved in an axial direction (6) in an axial deformation movement relative to one another, and by virtue of the axial deformation movement of the deforming tool (3, 25) and the workpiece blank (4), the forming helical tooth sequence (16, 26) of the deforming tool (3, 25) can be engaged in the workpiece blank (4) during the axial deformation movement of the deforming tool (3, 25) and the workpiece blank (4), thereby forming the helical tooth sequence (21, 24) of the workpiece in the workpiece blank (4); a machine control device (18) by means of which the feed drive device (8) can be controlled; In a deformation processing machine comprising: the feed drive (8) and a rotary drive (9) capable of moving the deforming tool (3, 25) and the work blank (4) in a circumferential direction (7) relative to each other in a deforming movement of the deforming tool (3, 25) and the work blank (4), the machine control device (18) is capable of controlling a resulting relative deformation movement between the deforming tool (3, 25) and the work blank (4), which forms the helical tooth row (21, 24) in the work blank (4) over the deformation length, to be divided into resulting partial deformation movements of the deforming tool (3, 25) and the work blank (4); a circumferential (7) deformation movement of the deforming tool (3, 25) and the work blank (4) is superimposed on each resulting partial deformation movement of the deforming tool (3, 25) and the work blank (4) in the axial direction, due to a partial deformation movement of the deforming tool (3, 25) and the workpiece blank (4) resulting from the mutual superposition of the axial deformation movement and the circumferential deformation movement (7), the forming helical toothing (16, 26) of the deforming tool (3, 25) engages in the workpiece blank (4) during the resulting partial deformation movement of the deforming tool (3, 25) and the workpiece blank (4), so that the helical toothing (21, 24) of the workpiece can be formed in the workpiece blank (4) over the partial deformation length, the deforming tool (3, 25) and the work blank (4) are moved relative to each other between two successive deforming motion segments with a return stroke movement performed in the opposite direction to the resulting deforming motion segments, A deformation processing machine, characterized in that each of said return stroke movements also has a component in said axial direction (6) and a component in said circumferential direction (7).

8. A deformation processing machine for forming an outer helical tooth row (21) of the cylindrical workpiece, a forming die (3) with a shaping inner helical tooth row (16) and which can be placed on the workpiece blank (4) is provided as a forming tool (3); 8. A forming machine according to claim 7, wherein the feed drive (8) and the rotary drive (9) are controllable by the machine control device (18) based on the resulting deformation portion movement of the forming die and the workpiece blank (4) so ​​that the forming inner helical tooth row (16) of the forming die engages in the workpiece blank (4) during the resulting deformation portion movement of the forming die and the workpiece blank (4), thereby forming the outer helical tooth row (21) of the workpiece in the workpiece blank (4) over the length of the deformation portion, respectively.

9. A deformation processing machine for forming an inner helical tooth row (24) on a wall (22) of a cylindrical opening (23) of the workpiece, a deforming tool (25) comprising a deforming mandrel having a shaping outer helical tooth row (26) and adapted to enter axially into the cylindrical opening (23) of the workpiece blank (4); 8. The deformation machine according to claim 7, wherein the feed drive (8) and the rotary drive (9) are controllable by the machine control device (18) based on the resulting deformation section movement of the deformation mandrel and the workpiece blank (4) such that the inner helical toothing (24) of the workpiece can be formed in the workpiece blank (4) over the deformation section length, respectively, by the forming outer helical toothing (26) of the deformation mandrel engaging in the workpiece blank (4) during the resulting deformation section movement of the deformation mandrel and the workpiece blank (4).

10. the deforming tool (3, 25) and the work blank (4) form a deforming partner, one of the deforming partners of the deforming tool (3, 25) and the workpiece blank (4) is supported so as to be freely rotatable in the circumferential direction (7); the other forming partner is held in a rotationally prevented manner in the circumferential direction (7), and 10. A forming machine according to claim 7, wherein the rotary drive (9) is configured so that, based on the corresponding dimensioning of the inclination angle (β) of the forming helical tooth row (16, 26) of the forming tool (3, 25) and on the axial forming movement of the forming tool (3, 25) and the workpiece blank (4), the freely rotatably mounted forming partner is driven in a rotational movement in the circumferential direction (7) relative to the other forming partner.

11. the deforming tool (3, 25) and the work blank (4) form a deforming partner, 10. The forming machine according to claim 7, wherein the rotary drive (9) is configured as a motorized rotary drive of at least one of the forming partners.

12. the deforming tool (3, 25) and the work blank (4) form a deforming partner, one of the deformation partners is configured as a deformation partner capable of a rotational movement in the circumferential direction (7) and is drivingly connectable to a rotary drive motor (15) of the rotary drive (9), the other deforming partner is held in a rotationally prevented manner in the circumferential direction (7), the machine control device (18) has a detection unit (19) by means of which rotational movement states occurring in the circumferential direction (7) of the rotationally movable deforming partner can be detected during the axial deforming movement of the deforming tool (3, 25) and the workpiece blank (4); and - A deformation processing machine as described in any one of claims 7 to 9, wherein the machine control device (18) can selectively form or separate a drive connection between the rotationally movable deformation processing partner and the rotary drive motor (15) depending on the detected rotational movement state of the rotationally movable deformation processing partner.

13. 8. A computer program for operating a deformation processing machine (1) according to claim 7, in which a numerically controlled machine control device (18) is provided as the machine control device (18), comprising:

10. A computer program for a machine control device (18), comprising control instructions that, when the computer program is executed in the numerically controlled machine control device (18) of the deformation machine (1) according to claim 7, cause the method according to claim 1 to be carried out.

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