阅读说明：本技术 拓扑展成磨削齿轮工件的方法和相应的磨削机 (Method for topologically generating a grinding wheel workpiece and corresponding grinding machine ) 是由 O·福格尔 于 2019-06-20 设计创作，主要内容包括：利用拓扑修形的磨削蜗杆(2)连续展成磨削至少两个齿轮工件(10)的方法,所述磨削蜗杆包括拓扑修形的蜗杆区域(5)用以磨削齿面,所述齿面在齿轮工件上进行拓扑修形,其中该方法至少包括以下步骤：a)提供第一齿轮工件,b)通过在第一齿轮工件和磨削蜗杆(2)之间进行相对运动来执行拓扑展成磨削操作,其包括：-相对进给运动；-相对轴向进给,所述相对轴向进给相对于工具旋转轴线(B)平行或倾斜地发生；和-相对移位运动,c)提供第二齿轮工件,d)执行相对跳跃运动,该相对跳跃运动相对于第二齿轮工件和磨削蜗杆(2)之间的所述工具旋转轴线(B)基本上平行或倾斜地延伸,e)对于第二齿轮工件重复步骤b)。(Method for the continuously generating grinding of at least two gear workpieces (10) with a topologically modified grinding worm (2) comprising a topologically modified worm region (5) for grinding tooth flanks which are topologically modified on the gear workpiece, wherein the method comprises at least the following steps: a) providing a first gear workpiece, b) performing a topologically generated grinding operation by relative movement between the first gear workpiece and a grinding worm (2), comprising: -a relative feed movement; -a relative axial feed, which occurs parallel or inclined with respect to the tool rotation axis (B); and-a relative displacement movement, c) providing a second gear workpiece, d) performing a relative jumping movement which extends substantially parallel or obliquely with respect to the tool rotation axis (B) between the second gear workpiece and the grinding worm (2), e) repeating step B) for the second gear workpiece.)

1. Method for the continuously generating grinding of at least two gear workpieces (10) with a topologically modified grinding worm (2) comprising a topologically modified worm region (5) for grinding tooth flanks (LF, RF) which are topologically modified on the gear workpiece (10), wherein the method comprises at least the following steps:

a) providing a first gear workpiece (10.1),

b) a topologically generated grinding operation is carried out by relative movement between a first gear workpiece (10.1) and a grinding worm (2), comprising:

-a relative feed movement (Se1, Sz 1);

-a relative axial feed (Sa1) which occurs parallel or inclined with respect to the tool rotation axis (B); and

-a relative displacement movement of the two parts,

c) providing a second gear workpiece (10.2),

d) performing a relative jumping movement which extends between the second gear workpiece (10.2) and the grinding worm (2) substantially parallel or obliquely with respect to the tool rotation axis (B),

e) repeating step b) for the second gear workpiece (10.2).

2. The method of claim 1, wherein the relative bouncing motion comprises a relative displacement and a relative torsion.

3. Method according to claim 2, characterized in that the relative displacement is carried out parallel to the tool rotation axis (B) and is defined by a path length (Δ S) which is shorter than the width (bm) of the topologically modified helical region (5), wherein the path length (Δ S) is preferably less than 1% of the width (bm).

4. Method according to any of claims 1, 2 or 3, characterized in that a parameter, preferably the contact density (EgD), is selected or predetermined in a preliminary method step, and that the jump width (Δ S) of the relative jump movement is determined from the parameter or from the contact density (EgD), respectively.

5. The method of claim 4, wherein:

-contact density (EgD) is a quantity defined for generating grinding of a gear workpiece, or

The contact density is the cumulative maximum that should not be exceeded during topological grinding.

6. The method according to any of claims 1 to 5, characterized in that the first gear piece (10.1) is geometrically different from the second gear piece (10.2) due to the relative jumping motion performed before repeating step b) on the second gear piece (10.2).

7. Method according to any of claims 1-5, characterized in that the relative jumping motion is defined by a path length corresponding to a part of the displacement path per revolution of the tool.

8. A grinding machine (100) having: a spindle (1) for receiving the grinding worm (2) and rotationally driving the grinding worm (2) about a tool rotation axis (B); a workpiece spindle (3) for receiving and rotationally driving a gear workpiece of a series of gear workpieces (10.1, 10.2); a dressing device (112) for receiving and rotationally driving a dresser (4); and a plurality of NC control axes designed to perform a relative movement between the grinding worm (2) and a gear workpiece of the series of gear workpieces (10.1, 10.2) for topologically generating grinding, and for performing a relative movement between the grinding worm (2) and a dresser (4) for dressing, wherein the grinding machine (100) comprises a controller (110) which is connected or connectable to the grinding machine (100), such that a relative jumping movement between the workpiece spindle (3) and the grinding worm (2) is carried out after topologically generating grinding of a first gear workpiece (10.1) of the series of gear workpieces (10.1, 10.2) and before topologically generating grinding of a second gear workpiece (10.2) of the series of gear workpieces (10.1, 10.2), wherein the jumping motion extends substantially parallel or obliquely with respect to the tool rotation axis (B).

9. The grinding machine (100) of claim 8, characterized in that the grinding machine comprises a user input device (30, SM) enabling a user to select or input a parameter, preferably a contact density (EgD), wherein the relative jumping motion is performed based on the parameter or contact density (EgD), respectively.

10. The grinding machine (100) of claim 8, characterized in that the grinding machine comprises a user input device (30, SM) enabling a user to select or input the jump width (Δ S) of the relative jump movement.

Technical Field

The subject of the invention is a method for topologically generating grinding of a plurality of gear workpieces. In particular, the present invention relates to an apparatus and method for topologically generating grinding of gear workpieces with a multi-dressed grinding worm (a multi-dressed grinding work). The invention also relates to a grinding machine with a control system for topologically generated grinding of a gear workpiece.

Background

Fig. 1 shows the elements of an exemplary grinding machine 100, wherein only the essential elements, namely a tool spindle 1 together with a grinding tool 2 and a workpiece spindle 3 with a workpiece 10, are labeled in this illustration. Further, the figure shows some of the axes that may be used for generating grinding of the workpiece 10. Here, three linear axes X, Y and Z are involved. There is also a rotation axis B which enables the grinding tool 2 to rotate. The tool spindle 1 together with the grinding tool 2 is pivotable about a pivot axis a so that the pitch of the grinding worm 2 corresponds to the helix angle of the workpiece 10. Furthermore, there is a rotation axis C (also called workpiece axis) in order to be able to rotate the workpiece 10. Fig. 1 shows that a whole series of coordinated linear, rotational and pivotal movements are necessary in order to be able to carry out generating grinding of a workpiece 10 with a grinding tool 2.

One of the factors that influence the economic efficiency of such a grinding machine 100 is the service life of the grinding tool 2, the grinding tool 2 being shown here in the form of a grinding worm. The faster the tool 2 wears, the fewer workpieces 10 can be machined with the tool 2. Therefore, various strategies exist for using the grinding worm 2 as economically as possible.

Different shifting strategies are used, among others. The continuous shift (sometimes also referred to as oblique shift) is a process in which the grinding machine 100 performs a continuous shift motion parallel to the Z axis to shift the grinding worm 2 relative to the workpiece 10. This form of displacement ensures that areas of the grinding worm 2 with new or fully cut abrasive grains are used. The displacement not only ensures the geometric accuracy of the gear workpiece, but also largely prevents thermal damage to the tooth flanks.

There is also a non-continuous displacement strategy based on the fact that, for example, the grinding worm 2 is divided into different zones for rough machining and for finishing the workpiece 10.

There are also displacement strategies in which the displacement is performed after each machining of the workpiece 10, for example, in order to be able to machine the next workpiece using a different area of the grinding worm 2.

In fig. 5A, the development of the tooth flank (worm wheel flank) 6 of the grinding worm 2 is shown in an enlarged illustration in a strongly schematic form, wherein the theoretical contact line tKl is represented in a schematic form, which results from a conventional grinding of 4 workpieces 10.1 to 10.4. The contact lines tKl for the 4 workpieces 10.1-10.4 are schematically represented by the curved group of long dashed lines, continuous lines, dotted lines, and short dashed lines. Each of these curve groups is assigned to a different workpiece 10.1-10.4. It can be seen that due to the displacement for each of the 4 workpieces 10.1-10.4, an area of the grinding worm 2 with new or fully cut abrasive grains is used. The contact line tKl shown in fig. 5A is a rolled line on a rectangle with sides h0 (tooth height) and l0 (reference spiral length).

This involves so-called topological generating grinding. The topological generating grinding of the gear workpiece 10 uses a grinding worm 2, which grinding worm 2 comprises at least one topologically modified worm region. With a topologically modified worm region, the tooth flanks of the gear workpiece 10 can, to a certain extent, have a modified tooth flank shape. The desired geometry of the tooth flanks is predetermined in the form of a twist on the grinding worm side surface and is mapped by a precisely controlled CNC-controlled relative movement between the grinding worm 2 and the gear workpiece 10 corrected on its tooth flanks.

During the topographically generated grinding of the gear workpiece 10, the entire topologically modified worm region is used in order to be able to produce a modified tooth flank shape, for example a tooth flank with a modified pressure angle, on the gear workpiece 10.

The grinding tool 2 may include rough machining and finish machining regions. If the topologically modified worm region is a finishing region, finishing can be accomplished using the topologically modified worm region, whereas the prior roughing is conventionally accomplished.

In addition to the shifting for using the entire topologically modified worm region, the grinding stroke is also carried out during generating grinding, which is necessary for being able to grind the workpieces 10 (see, for example, fig. 1 or 2) over their entire tooth width b 2. As shown in fig. 1, the grinding stroke of spur gear 10 includes linear movement of grinding worm 2 parallel to the X-axis of machine 100.

Furthermore, the feed movement is performed to allow the teeth of the grinding worm 2 to be inserted to the final depth in the tooth gap of the gear workpiece 10. In the example of fig. 1, the feed motion is parallel to the Y-axis of the machine 100.

Further optimization of the topological generating grinding using a grinding worm is required. Above all, increasing the service life of the grinding worm is an important aspect of research.

Disclosure of Invention

It is therefore an object of the present invention to provide a method of topographically generated grinding which is more efficient than previous topographically generated grinding methods.

The object of the invention is also to develop a control system or software device for a grinding machine for machining gears by topographically generated grinding, which allows reproducible high precision of the grinding process and still high efficiency. Furthermore, appropriate methods will be provided to help improve efficiency.

In particular, it is an object of the invention to provide a grinding machine for topologically generated grinding of spur gears, which is capable of grinding a series of workpieces with consistently high accuracy and has an optimized service life of the grinding tool.

The corresponding method of the invention is characterized by the features of claim 1.

The method according to the invention is designed for the continuous generating grinding of at least two gear workpieces using a topologically modified grinding worm which comprises a topologically modified worm region for grinding the tooth flanks which are topologically modified on the gear workpiece. The method at least comprises the following steps:

a) providing a first gear workpiece, and providing a first gear workpiece,

b) performing a topologically generated grinding operation by relative movement between a first gear workpiece and a grinding worm, comprising:

-a relative feed movement of the feed rollers,

-relative axial feed parallel or oblique to the tool rotation axis, and

-a relative displacement movement of the two parts,

c) a second gear workpiece is provided and,

d) performing a relative jumping motion which extends between the second gear workpiece and the grinding worm substantially parallel or obliquely with respect to the tool rotation axis,

e) and c), repeating the step b), and carrying out topology generating grinding operation on the second gear workpiece.

The relative displacement movement can be defined, for example, in a known manner as a displacement path per tool revolution (per tool revolution).

In at least some embodiments, the relative jumping motion is performed in such a way: the topologically generated grinding operation of the first gear workpiece is initiated in a different contact region of the grinding worm than the topologically generated grinding operation of the second gear workpiece.

For at least some embodiments, the relative jumping motion is performed such that its extension (length) relative to the topologically modified worm shaft region is small to avoid leaving the topologically modified worm shaft region by performing the relative jumping motion and the topological grinding operation. In particular, the relative jumping movements involved are smaller than the displacement path used per revolution of the tool, which is predetermined for machining by topographically generated grinding.

In at least some embodiments, the relative skip motion is only performed during finishing between the topographically generated grinding of the first gear workpiece and the topographically generated grinding of the second gear workpiece.

In at least some embodiments, the relative jump motion is defined by a jump distance, which in turn is determined by a contact density, wherein the contact density is a metric that characterizes the load distribution on the grinding worm when producing multiple workpieces using the same grinding worm.

In at least some embodiments, the relative jumping motion is defined by a constant jump width. This means that the jump movement performed before the topological generating grinding of, for example, the second gear workpiece has the same jump width as the jump movement performed before the topological generating grinding of, for example, the tenth gear workpiece.

Further preferred embodiments can be found in the respective dependent claims.

Drawings

Further details and advantages of the invention are described below with the aid of embodiments and with reference to the drawings.

Fig. 1 shows a schematic perspective view of a prior art grinding machine designed for grinding a workpiece with a grinding tool.

Fig. 2 shows a schematic side view of an exemplary spur gear with straight teeth of the prior art, wherein basic terms are defined on the basis of this view.

Fig. 3 shows a schematic side view of an exemplary prior art grinding worm, wherein basic terms are defined on the basis of this view.

FIG. 4A shows a highly schematic graphical representation of the steps of the method of the present invention, wherein these steps are performed for topographically generating grinding of a first gear workpiece.

Fig. 4B shows a highly schematic graphical representation of the steps of the method of the present invention, wherein these steps are performed for topographically generated grinding of a second gear workpiece.

Fig. 5A shows a highly schematic development of the tooth flanks of the grinding worm in an enlarged view, wherein the theoretical contact line is represented in schematic form, which results from a conventional generating grinding of 4 workpieces.

Fig. 5B shows a highly schematic development of the tooth flanks of the topological grinding worm in an enlarged view, wherein the theoretical contact lines are shown in schematic form, which occur during the topological grinding of 4 gear workpieces, if in each case relatively jumping, which takes place according to the invention before grinding each subsequent gear workpiece.

Figure 6 shows a schematic perspective view of a grinding machine according to one embodiment of the present invention.

Detailed Description

In connection with this specification, terminology is used which is also used in connection with publications and patents. It should be noted, however, that these terms are used for convenience only. The inventive concept and scope of the patent claims should not be limited by the interpretation of the selection of specific terms. The present invention may be readily transferred to other conceptual systems and/or fields. These terms will be used similarly in other areas of expertise.

As is well known, topographically generated grinding in a continuous grinding process may be used to produce gear workpieces 10 having specially contoured tooth surfaces. By using a grinding worm 2 comprising a topologically modified worm region 5 (see for example fig. 3), it is possible, for example, to produce crowning (see for example fig. 2) of the tooth flanks LF and RF of the gear workpiece 10. By providing a suitable crowning, the sensitivity to position errors can be reduced when mounting the gear 10. In addition, noise emissions may be favorably affected.

In principle, topologically generated grinding can be used to reduce or completely prevent deviations (also referred to as staggering) that occur during grinding with the grinding worm 2 due to the continuously changing position of the contact line. This is achieved by using a suitably shaped worm area 5 of the grinding worm 2 in a precisely controlled manner. This requires a high precision stand (see e.g. fig. 6) and an optimized drive of the grinding machine 100, which positions and moves the grinding worm 2 with high repetitive accuracy relative to the gear workpiece 10.

The grinding worm 2 which can be used in conjunction with the method described here has at least one topologically modified worm region 5, as shown in fig. 3. The topologically modified worm region can have different contour angles over the width bm of the worm region 5, for example. In the example shown in fig. 3, the topologically modified worm region 5 extends over approximately half the spiral width b 0. The diameter of the grinding worm 2 is indicated by d 0. Over time, the diameter d0 decreases, since material is removed during the dressing process of the grinding worm 2.

The topologically modified worm region 5 can be modified in a convex (crowned) manner, for example, by changing the pitch height, to give only one example of a possible modification of the topology of the grinding worm 2. However, the corresponding modifications of the grinding worm 2 are usually so small as to be hardly visible. In fig. 3, the topologically modified worm area 5 is highlighted in grey so that it is fully visible.

Fig. 2 shows a schematic side view of an exemplary spur gear 10. However, the present invention may also be applied to a helical-toothed gear workpiece 10. The backlash is particularly evident on the gear workpiece 10 of fig. 2, with the left side of the backlash being defined by the flank LF and the right side by the flank RF. The tooth root ZG is shown in gray. The tooth width is indicated by reference character b 2.

At least some embodiments of the inventive method relate to a method for continuous generating grinding of at least two gear workpieces 10.1, 10.2 of a series of gear workpieces. The details of the corresponding method steps are shown in a strongly schematic form in fig. 4A and 4B. A topologically modified grinding worm 2 is used, which comprises at least one topologically modified worm area 5, as shown in the example in fig. 3. A continuous generating grinding process is carried out such that topologically modified tooth flanks LF, RF on the gear workpieces 10.1, 10.2 are ground. As shown in fig. 4A and 4B, the tool (rotation) axis B coincides with the Z axis (displacement axis).

The method of the invention comprises at least the following steps, wherein the use of the letters a), b), a, etc. does not necessarily imply a corresponding chronological order of the steps:

a) a first gear workpiece 10.1 is provided, which can be removed from a parts store and clamped to the first workpiece spindle 3 of the grinding machine 100, for example.

b) The topologically generated grinding operation is carried out by a relative movement between the first gear workpiece 10.1 and a grinding worm 2 clamped to a tool spindle 1 of the grinding machine 100. The topology generating grinding operation includes at least the following steps:

A. the relative feed motion Sz1 engages the grinding worm 2 with the gear workpiece 10.1. In order to be able to insert the teeth of the grinding worm 2 into the tooth gaps of the first gear workpiece 10.1 in a clean manner, centering Se1 is performed during or before the feed. In fig. 4A, the centering Se1 is schematically indicated by a double arrow, which here extends transversely to the direction of the feed movement Sz 1.

B. The relative axial feed Sa1 is parallel or oblique with respect to the tool rotation axis B. In the example of fig. 4A, the axial feed Sa1 extends parallel to the tool rotation axis B, which in this example coincides with the Z-axis.

C. Including relative displacement motion of translation and torsion (torsion not visible in fig. 4A).

At the end of the generating grinding operation on the first gear workpiece 10.1, a retracting movement Sr1 is usually carried out to remove the meshing engagement between the gear workpiece 10.1 and the grinding worm 2.

After the first gear piece 10.1 is completed, another gear piece of the series of gear pieces (e.g., the second gear piece 10.2) is provided. The machining of the second gear workpiece 10.2 is illustrated in fig. 4B. The topology generating grinding operation includes at least the following steps:

c) a second gear workpiece 10.2 is provided, which can be removed from the parts store and clamped on the first workpiece spindle 3 of the grinding machine 100, for example.

d) A relative jumping movement is performed which extends substantially parallel or obliquely to the tool rotation axis B, wherein the jumping movement is performed between the second gear workpiece 10.2 and the grinding worm 2 by moving at least one axis of the grinding machine 100. The purpose of performing the relative jumping motion is explained in detail below. In the region between fig. 4A and 4B, the relative jumping motion is represented by a jump width Δ S. The jump distance Δ S is shown in an exaggerated manner so that it is fully visible.

e) Repeating step b) for the second gear piece 10.2 so that the second gear piece 10.2 is subjected to a topographically generated grinding operation. The topology generating grinding operation includes at least the following steps:

A. the relative feed motion Sz2 engages the grinding worm 2 with the gear workpiece 10.2. In order to be able to insert the teeth of the grinding worm 2 cleanly into the tooth gaps of the second gear workpiece 10.2, the centering Se2 is performed within the feed range or before the feed. In fig. 4B, the centering Se2 is schematically indicated by a double arrow, which here extends transversely to the direction of the feed movement Sz 2.

B. The relative axial feed Sa2 occurs parallel or oblique to the tool rotation axis B. In the example of fig. 4B, the axial feed Sa2 extends parallel to the tool rotation axis B.

C. Relative displacement motion, including displacement and torsion (torsion not visible in fig. 4B).

At the end of the generating grinding operation on the second gear workpiece 10.2, a retraction movement Sr2 is usually carried out to remove the meshing engagement between the gear workpiece 10.2 and the grinding worm 2.

After the grinding of the second gear workpiece 10.2 has been completed, a further gear workpiece of the series of gear workpieces (e.g. gear workpieces 10.3, 10.4) may be provided and machined. However, the machining process may also be terminated here.

Without performing a relative jumping motion, the topological generating grinding operation of the first gear workpiece 10.1 will start at the same position of the grinding worm 2 as the generating grinding operation of the second gear workpiece 10.2 and the other gear workpieces. Reference is briefly made here to fig. 5B. Without relative jumping motion, the topological generating grinding of all gear workpieces of the series of gear workpieces is performed along the same theoretical contact line tKl (e.g., along the contact line shown by the solid line in fig. 5B).

In all embodiments, the relative jumping motion, which may be defined, for example, by a jump width Δ S (as schematically shown between fig. 4A and 4B or in the region in fig. 5B), is performed before the topological generating grinding of the subsequent gear workpiece (e.g. before the generating grinding of the second gear workpiece 10.2). This jumping movement always occurs in the topologically modified worm region 5 of the grinding worm 2, i.e. it is preferably only carried out in the following cases: the topologically modified worm region 5 is used for grinding subsequent gear workpieces and this relative jumping movement is carried out in such a way that the topologically grinding does not leave the modified worm region 5.

By specifying and performing a relative jumping motion, it is ensured that the generating grinding operation of the subsequent gear workpiece starts at different positions in the topologically modified worm area 5 of the grinding worm 2 and follows different theoretical contact lines tKl, as shown in fig. 5B. However, since it is a grinding worm 2 comprising a topologically modified worm region 5, the relative jumping motion results in the first gear workpiece 10.1 differing minimally geometrically from the second gear workpiece 10.2. However, these differences are so small that they have no influence on the running properties of the respective ground gear workpieces 10.1, 10.2, 10.3, 10.4.

For at least some embodiments, the relative bouncing motion is defined by a contact density EgD, where the contact density EgD may be a tool specific parameter, i.e., the contact density EgD may also be different for grinding worms 2 of different sizes and/or different designs (e.g., differently coated grinding worms).

For at least some embodiments, the contact density EgD is assumed to be a measure of the upper limit that has proven successful for use in grinding worms 2 having their minimum effective diameter d0 for generating grinding of gear workpieces. See german patent application DE 102018109067.6 filed in 2018 in the name of Klingelnberg GmbH, month 4 and day 17. Due to the relative jumping movement, as described and claimed in this document, it can be ensured that the flanks of the grinding worm 2 are used in such a way that there is no cumulative contact density above this upper limit when using the topologically modified worm region 5 of the grinding worm 2. However, such upper limit values may also be determined in other ways (e.g., experimentally).

As described in the above-mentioned german patent application DE 102018109067.6, the contact density EgD can be considered along the helix or tooth lengthwise direction and is defined as the reciprocal value of the helical path per revolution of the tool grinding the worm 2 (in fig. 5A, this helical path per revolution of the tool is designated Δ C). This means that in this case the contact density EgD defines the number of interventions per screw stroke.

As described in german patent application DE 102018109067.6, the contact density EgD is significantly lower for the maximum grinding worm diameter than for the minimum grinding worm diameter achieved after multiple truings of the grinding worm 2.

For at least some embodiments, the jump width Δ S of the relative jump movement is calculated in a preliminary method step, for example using software or a software module SM. In these embodiments, the step width Δ S defines the relative position of the pass line (or theoretical contact line tKl in fig. 5B) in the topological grinding of several gear workpieces 10.1, 10.2, 10.3, and 10.4.

In at least some embodiments, the relative jumping motion is selected such that the jumping motion does not cause a subsequent topology generating grinding operation (including shifting) out of the topologically modified worm region 5.

Preferably, for at least some embodiments, the path length corresponds to a portion of the displacement path per revolution of the tool. Preferably, for at least some embodiments, the path length is less than 1% of the width of the modified worm region.

Instead of defining the jump motion by a path length parallel to the tool rotation axis B, it may also be defined by another variable (for example, by a path parallel to the winding flank line of the grinding worm 2).

In at least some embodiments, relative jumping motions parallel to the tool rotation axis B are defined and/or performed such that subsequent topological grinding operations can only be performed within the topologically modified worm region 5. For this purpose, for example, the limit values of the topologically modified worm region 5 can be defined by relative or absolute values in the controller 110 and/or in the software or software module SM of the grinding machine 100.

The grinder 100 is used in at least some embodiments, as shown by way of example in FIG. 6. The grinding machine 100 comprises a tool spindle 1, the tool spindle 1 being designed to pick up and rotationally drive a grinding worm 2 about a tool rotation axis B. It also comprises a workpiece spindle 3, which workpiece spindle 3 is designed to pick up and rotationally drive a gear workpiece 10 from a series of gear workpieces 10.1, 10.2.

The grinding machine 100 may further include a dressing device 112, the dressing device 112 being designed to pick up and rotationally drive a dresser (dresser) 4. Furthermore, the grinding machine 100 has a plurality of NC-controlled axes for carrying out the relative movements between the grinding worm 2 and the gear workpiece 10, which are required for topologically generating grinding and dressing of the gear workpiece 10. Furthermore, the grinding machine 100 comprises a controller 110 connectable to the grinding machine 100 (e.g. via an internal or external communication link 111) such that after topological generating grinding of a first gear workpiece 10.1 of the series of gear workpieces and before topological generating grinding of a second gear workpiece 10.2 of the series of gear workpieces, a relative jumping motion may be performed. As already explained, this jumping movement is a small relative movement between the workpiece spindle 3 and the tool spindle 1 or between the workpiece 10.2 and the grinding worm 2. The jumping motion extends substantially parallel or oblique to the tool rotation axis B.

For at least some embodiments, the grinder 100 may include a means for user input 30 (e.g., a portable device) and/or a software module SM that enables a user to select or input a parameter, preferably the contact density EgD, wherein the relative jumping motion is performed based on the parameter, respectively the contact density EgD.

In at least some embodiments, the grinder 100 may include a means for user input 30 (e.g., a portable device) and/or a software module SM that enables a user to select or input the jump width Δ S of the relative jump motion.

Fig. 4A and 4B show that the relative jumping motion changes the position of the grinding worm 2 relative to the gear workpiece position. In addition, the relative position may have changed due to the clamping of the first gear workpiece 10.1 and the clamping of the second gear workpiece 10.2. Therefore, the centering Se1 or Se2 is preferably carried out before generating grinding of the gear workpieces 10.1 and 10.2.

As shown in fig. 5A, a strongly schematic development of the flanks 6 of the grinding worm 2 in enlarged form has already been described at the beginning. Theoretical contact line tKl is represented here in schematic form, which results from a conventional generating grinding of 4 workpieces 10.1, 10.2, 10.3 and 10.4.

On the other hand, fig. 5B shows a detail of the present invention. Fig. 5B shows a strongly schematic development of the flanks 6 of the topological grinding worm 2 in an enlarged form. Here, the theoretical contact lines tKl1, tKl2, tKl3, tKl4 are represented in schematic form, which occur during the topological grinding of 4 gear workpieces 10.1, 10.2, 10.3 and 10.4 if the relative jumping motion according to the invention is carried out in each case before the grinding of each subsequent gear workpiece. The helical travel per revolution of the tool is indicated by Δ D in fig. 5B. The helical travel per revolution Δ D of the tool is significantly greater than the helical travel per revolution Δ C of the tool shown in fig. 5A for conventional generating grinding.

With regard to fig. 5A and 5B, it should be mentioned last that the contact lines shown cautiously are theoretical lines. In fact, the contact zones are actually overlapping due to the interaction of forces.

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