WO2019170403A1

WO2019170403A1 - Contact rolling tester, machining system and method for the dual-flank roll testing of a toothing

Info

Publication number: WO2019170403A1
Application number: PCT/EP2019/053994
Authority: WO
Inventors: Stephan Kadlubski
Original assignee: Gleason-Pfauter Maschinenfabrik Gmbh
Priority date: 2018-03-07
Filing date: 2019-02-18
Publication date: 2019-09-12
Also published as: DE102018001837A1

Abstract

The invention relates to a contact rolling tester (100) for a dual-flank roll test of a toothing (2) which is supported by a free-running shaft (1) and has an axis of rotation, with a holder (13, 14) for holding the shaft during the roll test, and with a rotationally driven mating toothing (20) which rolls on the toothing during the roll test, wherein on two cylindrical shaft portions (3, 4) spaced axially apart from each other, the holder supports the shaft against gravity laterally from the outside, seen in the radial direction, the cylinder axis of said shaft portions (3, 4) corresponding to the toothing axis. The invention further relates to a machining system having a toothing machining tool and a contact rolling tester of this kind, and to a method with a dual-flank roll test of a toothing supported by a free-running shaft and having an axis of rotation.

Description

TREAD TESTING DEVICE, MACHINING SYSTEM AND METHOD FOR PROCESSING

TWO-WHEEL TREAD CHECKING A TURN

The invention relates to a Wilzprüfeinrichtung for a two-flank Wälzprüfung carried by a free-running shaft, having a rotation axis teeth, with a holder for holding the shaft during the Wälzprüfung, and with a rotationally driven, rolling in the Wälzprüfung with the toothing counter teeth, and a such a Wälzprüfeinrichtung having Verzahnungsbearbeitungssystem

The two-flank rolling test is well known to those skilled in the art as a test method with which, for example, the running behavior of a toothing can be checked. In addition to random checks, these are also used to check in advance any gear or toothing to be machined later, for example by honing, by means of an oversize inspection. The measured variable of the two-flank rolling test is the axial distance variation. All this is known and described, for example, on page 676 of the textbook "Innovative Zahnradfertigung" by Thomas Bausch, 3 Edition.

Furthermore, in the case of the two-flank rolling test, either the teeth to be checked can be driven to rotate, which then also causes the counter-wheel to rotate via the engagement with the counter-wheel, or vice versa. The former case is particularly useful when the rolling test already takes place in a clamping, in which then takes place a processing of the tested teeth, so that a spindle drive for later processing can be used as a drive for the rolling test. If, on the other hand, the mating gear is driven, the toothing can be mounted freely rotatably with conventional tensioning devices. In the case of waves, a tailstock is usually provided, which engages with a dome (grains) in a center on the free axial shaft end and thus helps that the teeth rotate exactly about the central shaft axis (= tooth axis) Axial ends are held by engaging in the respective center grains.

The invention has for its object to improve a Wälzprüfeinrichtung of the type mentioned in particular with a view to easier handling.

This object is achieved by the invention in terms of device technology by further developing a Wälzprüfeinrichtung of the type mentioned, which is characterized essentially in that the holder of the shaft at two {in the sense of at least two axially spaced cylindrical shaft sections whose cylinder axis with the toothing axis coincides, seen in the radial direction laterally supported from the outside against the force of gravity.

Thus, the shaft is not clamped according to the invention via a clamping device. Also, according to the invention, no two-sided holding is effected via grains engaging in centers of the shaft. Rather, the shaft can be stored in the invention, for example by means of a gripper on the holder. There is at least one direction radially to the axis of the axis, with respect to which the holder does not hold the shaft. It is understood that the holder is designed such that the toothing axis then runs parallel to the axis of rotation of the counter teeth in the rolling test within the usual tolerances allowed. For this reason, the invention accepts the disadvantage of having to work with a workpiece-bound holder in comparison to the usual clamping devices or holders used above grains. Because the diameter of the cylindrical shaft sections may vary from application to application be different, and the two used to support shaft sections may already have different diameters among themselves already.

However, it has been recognized that by accepting this disadvantage, easier handling can be achieved because neither clamping nor axial displacement of grains to bring about the support of the shaft is required. The invention thus provides a mount which is passive by not requiring active movement or actuation of the mount between machining state of the retained shaft and a release state for removal of the shaft from the rolling test device.

In a preferred embodiment, the support for the support on two retaining arms. The can be designed as holding shells and in particular be separate components. In this way, the Werkstückgebundenheit the holder is only in the workpiece-bound design of the support arms.

It is preferably provided that the axial distance of the retaining arms is adjustable, in particular whose respective axial position is adjustable. This increases the flexibility of Wälzprüfeinrichtung.

In this context, it is provided that a mobility of the support arms is given in particular via a common rail. The common rail simplifies the realization of the axis parallelism of the toothing axis and the countershaft axis. In a particularly preferred embodiment, a release or locking of the retaining arms from / to the rail can be achieved without tools, for example via conventional quick-release devices.

For supporting against at least a predominant proportion of gravity has / have one or more of the support arms on a first contact surface. This can be horizontal in particular. A planar configuration of the first contact surface is preferred as a whole or at least in the contact region. The contact surface forms a tangent plane to the cylinder jacket surface of the supported shaft section.

Furthermore, it is particularly preferably provided that one or more of the support arms has / have a second contact surface, which in any case opposes the shaft supports a part of a force applied via the counter teeth toothing force. The usually used in the Wälzprüfung pressing the counter teeth against the teeth to be tested is preferably taken mainly by the second bearing surface. This is preferably also designed as a planar surface and can stand for a simple geometry perpendicular to the first contact surface.

Such an arrangement of first and second abutment surface is also advantageous for the below-described realization of a plane parallelism between these abutment surfaces and mounting surfaces of the support arms on, for example, the common rail. Thus, it is preferably provided that one or more of the support arms has / have a third and / or a fourth contact surface with whose abutment on the rail the position of the support arm is determined in space, wherein in particular the third contact surface (first mounting surface) parallel to first contact surface and / or the fourth contact surface (second mounting surface) is parallel to the second contact surface. In this way, the workpiece-bound support arms can be made particularly simple, since with given plane parallelism as determinants in the production only the distances between the first and third or third and fourth contact surface must be met.

However, the invention is not limited to these geometrical conditions, other orientations of first and second abutment surface to each other as well as in principle other types of mounting of the support arms in the Wälzprüfeinrichtung are conceivable.

The retained cylindrical portions may be suitable for later use as bearing seats, e.g. with tolerance field H4, H5, H6, be formed sections.

The retaining arms are not only workpiece-bound, but also wearing parts. This is because by continuous use of the Wälzprüfeinrichtung abrasion occurs at the contact areas of the contact surface. To keep this as low as possible, the support arms are made of a wear-resistant material as possible, such as tool steel. Particularly preferably, a wear resistance-increasing coating is provided on the contact surfaces, suitable here are for example tungsten carbide, titanium carbonitride, coatings produced in the thin-layer chromium process such as ATC, or PVD or PACVD coatings such as the BALINIT Dünnfiimbeschichtung of Oerlikon based eg AICrN, TiAIN, CrN or TiM. If the holding arms designed for a specific workpiece batch are present, they are adjusted to the axially appropriate spacing, for example, attached to a common rail of the rolling test device. Then the welts can be placed on the support arms. In a preferred embodiment, a holding arm or both holding arms on the opposite with respect to the shaft of the second Aniagefläche side still an embrace with respect to the height level of the first contact surface. In this way, a dropping down of the shaft can be avoided. By engagement of the mating gear, the shaft is then kept pressed in its final position during the rolling test against the contact surface (s) of the retaining arms. In that regard, the pressure force of the counter toothing contributes to fixing the position of the shaft axis.

If the teeth to be tested are not located between the two cylindrical shaft sections but outside, then the second contact surfaces of the retaining arms are placed on different sides of the shaft, so that the position-fixing

Effect is maintained.

In particular, in the case of helical gears particularly axially displaceable stops (stoppers) may be provided which limit an axial movement of the shaft (on the rolling engagement between helical gearing and counter teeth in the rolling test arise low axial forces). In a preferred embodiment, the axis of the counter-toothing is higher than the shaft axis and / or the axis distance axis used for the measured variable extends at an angle not exceeding 90 ° to the second contact surface. In this way it is easily ensured that the shaft axis retains its orientation.

With regard to the test side with counter gear and its drive is preferably provided that this can take different axial positions with respect to an axial reference of the holding arm mounting. Preferably, it is to a slide axially parallel to the particular common rail for the support arms displaced. Also, such displaceability can preferably be performed without tools, in particular by releasing a quick release, desired axial positioning and locking by the quick release. The Wälzprüfeinrichtung can be used by additional holding elements for discs. These holding elements can rotate about the center of the disk store (conventional storage as in the prior art), and are preferably on the assembly side as the holding arms ausgeiegt.

Furthermore, the invention also provides under protection a machining system with a gear processing machine, which may be a honing machine, but also another machine for machining the teeth, such as other hard finishing machines such as grinding or hard peeling machines, or else gear generating machines such as Wälzschälmaschinen, Wälzstoßmaschinen, Wälzschälmaschinen , but also secondary processing such as the chamfering or introduction of structures into the toothing, as well as with a Wälzprüfeinrichtung according to one of the aforementioned aspects,

Preferably, these can be coupled via a tool automation, that is, the waves are automatically fed to the Wälzprüfeinrichtung and automatically passed to the Wälzprüfen after the gear processing machine.

In procedural terms, the invention provides under protection a method for two-flank Wälzprüfen a carried by a freewheeling shaft, having a rotation axis toothing, in which the while during the Wälzprüfung with a rotationally driven, with the toothing rolling counter teeth is held by a holder, the essentially characterized in that the shaft of the holder at two axially spaced-apart cylindrical portions, the cylinder axis coincides with the tooth axis, viewed in the radial direction laterally from the outside against gravity is truncated. Further features, details and advantages of the invention will become apparent from the following description with reference to the accompanying figures, of which

Fig. 1 shows a Wälzprüfeinrichtung, and

Fig. 2 shows schematically a such Wälzprüfeinrichtung exhibiting

Processing system shows. 1, a rolling test device 100 is shown. In the dargestetten situation, a toothing 2, which is supported by a shaft 1, is tested. In the simplifying view of FIG. 1, however, the teeth of the toothing are not shown, just as little as the teeth of the counter toothing 20 with which the test he follows. The counter-toothing 20 is mounted on a tool spindle with an axis of rotation B and rotationally driven via Spindeiantrieb 40. By rolling toothing engagement with toothing 2, the shaft 1 is rotated and monitored over some, for example three revolutions of the axial distance between the axis of the mating gear 20 and Wetlenachse (= tooth axis) as a measured variable.

Prior to such Wälzprüfung the shaft 1, for example, by a gripper, not shown in two holding arms 13, 14 is inserted, which are designed in this embodiment as holding shells. These holding shells 13, 14 receive and support cylindrical shaft sections 3 and 4, respectively, against the weight force, which is e.g. could serve as seats for the storage of the welts in the later use of the shaft 1.

To set the matching axial distance, the holding shells 13, 14 via tool-free operable quick release 11, 12 detachable from a running rail 71, can be moved to the desired axial position and tightened again.

It can be seen that the support of the shaft 1 is not carried out as usual in the art on grains which engage in existing in this embodiment centers 7 at the axial ends 5, 6 of the shaft 1 (only the center 7 on the left in Fig. 1 axial end 6 is shown). Thus, the shaft 1 in the same position of the holder 13, 14, in which the Wälzprüfung is performed, are introduced and deployed again, without requiring the holder 13, 14 (axially) would have to be moved.

In the embodiment shown, a first contact surface 24 of the left in Fig. 1 holding arm 14 is arranged horizontally. It is supported against the weight of the shaft 1 and also against a small portion of a contact pressure, which is introduced via the counter-toothing 20 in the rolling test, since at radial delivery along axis X via rail 01 along the axis spacing axis, this under a low angle in this embodiment is directed to the horizontal and thus the gearing 2 proportionately according to "pushes down".

A second abutment surface 34, which in this embodiment is arranged vertically to the first abutment surface 24 on the left in FIG. 1 holding arm 14, supports the shaft against the main part of the pressing force. The latter is so small that the cylindrical sections (seats) 3, 4 experience no influence on the later property of the object. Thus, in a test, a few of the order of magnitude became a few hundred Shaft revolutions under Wälzprüfbedingungen no significant deviations from the nominal diameter of the seats 3, 4 found.

The surfaces 24, 34 and the corresponding surfaces 33 of the other support arm 13 are in this embodiment as well preferably provided with a wear resistance-increasing coating to increase the life of the support arms 13, 14, Once the surfaces 24, 14 were exposed to a certain abrasion however, if replacement of the support arms 13, 14 is not required immediately, it is sufficient to use a calibration shaft with a gearing to recalibrate the Wälz test measurement apparatus to a final wear limit.

If the toothing 2 is a helical toothing (and in the case of the counter toothing 20 a counter-helical toothing correspondingly adapted for maintaining parallel axes), small axial forces occur on the shaft 1 in the rolling test engagement. In order to avoid consequent axial displacement of the shaft 1, the designated in Fig 1 by the reference numerals 15 and 16 stop elements are provided. The axial position of the stop elements 15, 16 is also adjustable without tools.

Also adjustable without tools is the axial position of the counter-toothing 20 via axial movement along a positioning rail 51, whose longitudinal direction extends parallel to the axis of rotation of the counter-toothing. The infeed axis and axle spacing axis X or their adjustment during positioning of the counter-toothing 20 takes place by means of carriage movement of a carriage 62 via rail 61. The feed movement of the counter-toothing 20 is damped and braked in its final phase by means 64.

As can also be seen from Fig. 1, the holding arms 13, 14 have a third abutment surface which is parallel to the first abutment surface 24 and the corresponding abutment surface of the right in Fig. 1 holding arm 13 and with which they in the in Fig. 1 according to upwardly directed tread 23 of the track 71 rest. The running rail 71 here has a guide groove 74, in the guide elements, not shown, of the holding arms 13, 14 run along. Furthermore, the holding arms 13, 14 have fourth contact surfaces which run parallel to the second contact surfaces 33, 34 and with which the holding arms 13, 14 abut against the shaft 1 facing side surface 72 of the running rail 71. The Hattearme 13, 14 are dimensioned so that the distance between the second and fourth bearing surface plus the radius of the held cylindrical portion 4 and 3 assumes the same value. Also, the dimensioning is such that the distance between the first and third abutment surface less this radius is equal to both holding arms. Are thus the radii of the seats 3 and 4 different sizes, the dimensions of the provided support arm are correspondingly different. The support arms 13, 14 are thus workpiece-bound components and wear parts, which, however, as described above, designed in a particularly simple form and in particular at attraction of the parallelism between the first and third or second and fourth contact surfaces are easy to produce.

In the case shown in FIG. 1, the toothing 2 to be tested is arranged between the seats 3, 4. In the event that, for example, the seat 3 other than shown in Fig. 1 left of the teeth 2 would be arranged, the shaft 1 facing surface of the surface 34 opposite Umgriffs 44 of the support arm 14 would be designed as a second contact surface (and thus tilting avoid the shaft axis from the parallelism to the axis of rotation of the counter-toothing 20).

On the rail 71, a modified holding arm could be applied, which has a suitable mandrel for receiving a disc-like workpiece. In this way, the construction designed primarily for shafts can also be used for disk-like gears.

In terms of evaluation, the Wälz testing machine shown operates according to the principle familiar to a person skilled in the art that the center distance between the two axes of rotation is monitored and evaluated. Accordingly, further explanations are no longer listed, information on the measurement principle and evaluations are familiar to the expert and described for example on page 676 in the textbook "Innovative Zahnradfertigung ¹ 'by Thomas Bausch, 3rd edition.

The Wälzprüfeinrichtung 100 shown in Fig. 1 may be embedded in a workpiece automation, for example, such that the shafts 1 of the device 100 are supplied via a tool automation 150 and passed from the Werkzeugautomatfon after Wälzprüfung to a downstream machine, such as a finishing machine for fine machining of Gearing 20 approximately by honing. This is schematically illustrated in FIG. The invention is not limited to the details described above. Rather, the particular features of the above description and the appended claims, alone or in combination, may be essential to the practice of the invention in its various embodiments.

Claims

A rolling tester (100) for a two-flank test of a freewheeling width (1) _" having a rotational axis toothing (2), with a holder (13, 14) for holding the shaft during the Wälzprüfung, and with a rotationally driven , in the Wälzprüfung with the toothing (2) rolling counter teeth (20), characterized in that the holder (13, 14) the shaft at two axially spaced cylindrical shaft sections (3, 4), the cylinder axis coincides with the axis of rotation of the toothing , Seen in the radial direction laterally supported from the outside against the force of gravity.

2. Wälzprüfeinrichtung according to claim 1, wherein the support (13, 14) for supporting two retaining arms (13; 14), whose axial distance relative to the shaft axis is adjustable, in particular their respective axial position is adjustable.

3. Wälzprüfeinrichtung according to claim 2, wherein one or more of the support arms (13; 14) along a rail (71) movable and in particular tool-free lockable is / are, the rail is in particular a common rail (71) for both support arms ,

4. Wälzprüfeinrichtung according to claim 2 or 3, wherein one or more of the support arms (13; 14) has a first bearing surface (24) / which supports the shaft against a predominantly proportion of gravity and in particular is horizontal.

5. Wälzprüfeinrichtung according to any one of claims 2 to 4, wherein one or more of the support arms (13; 14) has a second abutment surface (33; 34) which supports the shaft in any case against a part of a counter-toothing introduced pressure force, wherein the second bearing surface (34) is in particular perpendicular to the first bearing surface (24).

6. Wälzprüfeinrichtung (100) according to any one of claims 3 to 5, wherein one or more of the support arms has / have a third and / or a fourth contact surface, the position of the holding arm in the space is determined by way of their concerns on the rail, wherein in particular the third contact surface is parallel to the first contact surface and / or the fourth contact surface is parallel to the second contact surface.

7. Wälzprüfeinrichtung (100) according to any one of claims 1 to 6, wherein a axial movement of the time limiting, in particular axially displaceable stopper (15; 16) is provided.

8. Wälzprüfeinrichtung (100) according to any one of claims 4 to 7, wherein the axis of the counter-toothing is higher than the shaft axis and / or the axis used for the measured variable Achsabstandsachse (X) at a 90 ° not exceeding angle to the second bearing surface.

9. Wälzprüfeinrichtung (100) according to any one of claims 3 to 8, wherein the counter gear via a slide axially parallel to the rail (71) for the support arms (13; 14) is displaceable.

A processing system (100, 150, 200) comprising a gear processing machine (200), in particular a honing machine, a Wälzprüfeinrichtung (100) according to any one of the preceding claims and a workpiece automation (150) for transferring workpieces from the Wälzprüfeinrichtung (100) to the gear processing machine (200).

11. A method for two-flank Wälzprüfen a carried by a free-running shaft, having a rotation axis toothing, wherein the shaft is held during the Wälzprüfung with a rotationally driven, rolling with the toothing counter teeth by means of a holder, which is characterized essentially in that the shaft is supported by the holder at two axially spaced cylindrical sections whose cylinder axis coincides with the tooth axis, viewed in the radial direction laterally from the outside against the force of gravity.