WO1992018279A1 - Method for finishing hardened crown wheels - Google Patents
Method for finishing hardened crown wheels Download PDFInfo
- Publication number
- WO1992018279A1 WO1992018279A1 PCT/NL1992/000073 NL9200073W WO9218279A1 WO 1992018279 A1 WO1992018279 A1 WO 1992018279A1 NL 9200073 W NL9200073 W NL 9200073W WO 9218279 A1 WO9218279 A1 WO 9218279A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pinion
- honing
- crown wheel
- teeth
- crown
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F15/00—Methods or machines for making gear wheels of special kinds not covered by groups B23F7/00 - B23F13/00
- B23F15/06—Making gear teeth on the front surface of wheels, e.g. for clutches or couplings with toothed faces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
- B23F19/05—Honing gear teeth
Definitions
- the invention relates to a method for finishing pre- f worked, in particular hardened, crown wheels.
- Crown wheels are gear wheels which are used in angle * drives with or without intersecting axes which may or may not
- Hardened crown wheels can be finished by grinding, but this is an expensive process, and the surface quality of the crown wheel teeth to be achieved by it is limited, and in
- a method for finishing pre-worked crown wheels is known from US Patent Specification 2,309,530, said method comprising making a pre-worked crown wheel to be worked mesh
- the honing pinion or crown wheel meshing therewith is in principle freely rotatable, and the crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion.
- the disadvantage of the known method is that the finishing process, and in particular the surface pressure between the tooth flanks of the crown wheel and a honing pinion, fluctuates too greatly during the different contact situations, with the result that the necessary high surface quality of the crown wheel teeth cannot always be guaranteed.
- the object of the invention is to provide an improved method by which very accurate crown wheels with a very high surface quality of the teeth can be obtained at reasonable cost.
- a method for finishing pre-worked, in particular hardened, crown wheels comprising making a pre-worked crown wheel to be worked mesh with a cylindrical honing pinion of which the number of teeth and the shape of the tooth flanks correspond to those of a working pinion which must be able to mesh with the finished crown wheel, either the crown wheel or the honing pinion being driven rotatably by an external drive element, while the honing pinion or the crown wheel meshing therewith is in principle freely rotatable, and the crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion, and at least two teeth of the crown wheel are always in engagement with teeth of the honing pinion.
- a method for honing gear wheels in which a gear wheel to be worked meshes with a honing gear with internal toothing, and in which the honing gear is driven and the gear wheel is freely rotatable, is known per se as the Fassler gear wheel honing process.
- this known method has until now been used only for honing cylindrical gear wheels.
- the invention is based on the realisation that a factor which has an influence on the high surface quality of the gear wheel teeth to be achieved by the Fassler honing process - namely the great coefficient of transverse contact between the honing gear with internal toothing and the gear wheel to be worked, through which any flaws in individual teeth of the gear wheel to be worked are compensated for - is also present in a drive with a crown wheel and a cylindrical gear wheel meshing therewith.
- the coefficient of transverse contact between a crown wheel and a cylindrical gear wheel meshing therewith can be great enough.
- the coefficient of transverse contact is particularly great if helical teeth are used, so that the result to be achieved can be even better then.
- Very accurate crown wheels with a very high surface quality of the teeth which can be subjected to very great stress and also produce low-noise drives, can be obtained by the method according to the invention.
- the invention also relates to a device for finishing pre-worked crown wheels with the aid of a cylindrical honing pinion of which the number of teeth and the shape of the tooth flanks correspond to those of a working pinion which must be able to mesh with the finished crown wheel, comprising means for fixing the crown wheel to be worked and the honing pinion, in such a way that the crown wheel to be worked can mesh with the honing pinion, drive means for rotary driving of either the crown wheel or the honing pinion, the width of the honing pinion being greater than the length of the teeth of the crown wheel, the honing pinion being mounted so that it is in principle freely rotatable, and the crown wheel and the honing pinion being movable relative to each other in the direction of the axis of the honing pinion, and the device being provided with loading means for applying an essentially constant load in the direction of rotation to the shaft of the in principle freely rotatable honing pinion or crown wheel, and such that the working direction of the drive means
- Fig. 1 shows schematically in cross-section and in elevation the disposition of a crown wheel to be worked and a honing pinion interacting therewith, in which the axes of the crown wheel and the honing pinion intersect;
- Fig. 2 shows an arrangement such as that in Fig. 1, in which the axes of the crown wheel and the honing pinion cross each other;
- Fig. 3 shows schematically a device for honing a crown wheel
- Fig. A shows a possible curve of the axial speed of the slide of the device of Fig. 3.
- Fig. 1 shows a crown wheel 1 which is hardened, and the teeth of which have to be finished by honing, in order to improve the surface quality of the teeth 2.
- the crown wheel 1 to this end meshes with a cylindrical honing pinion 3 whose geometry, in particular shape of tooth flanks, corresponds to that of a cylindrical working pinion which subsequently has to be able to mesh with the crown wheel.
- the axis 4 of the crown wheel 1 intersects the axis 5 of the honing pinion.
- the honing pinion 3 has straight teeth 6 , and the teeth 2 of the crown wheel extend in the radial direction of the crown wheel.
- the honing pinion 3 can be a base element made of synthetic resin in which abrasive grains are embedded, or can be a steel base element set with diamonds or CBN grinding grains.
- either the crown wheel 1 or the honing pinion 3 meshing therewith is driven so that it rotates, while the other element, i.e. the honing pinion 3 or the crown wheel 1, is in principle freely rotatable.
- freely rotatable means that the other element is not driven externally.
- Crown wheel and honing pinion are not connected to each other externally. The connection is only through the meshing teeth of crown wheel and honing pinion.
- the teeth of the crown wheel are finished through the teeth of the honing pinion 3 gliding over the teeth 2 of the crown wheel 1,
- the honing pinion 3 is moved to and fro in the direction of its axis 5 during the working operation. This movement is possible without further ado, since the honing pinion 3 is cylindrical, and is thus identical in shape in each cross-section at right angles to the axis.
- the dimensioning of the crown wheel and the pinion must always be selected correctly, the most important parameters being the contacting tooth width, the number of teeth of the pinion, and the tooth number ratio between crown wheel and pinion.
- a coefficient of transverse contact greater than two is achieved in, for example, a pinion with 10 teeth with a tooth number ratio greater than 8 and in a pinion with 20 teeth with a tooth number ratio greater than 1.7.
- crown wheel 1 and the honing pinion 3 are provided with helical teeth 5, 6 respectively, it is not necessary to make the honing pinion 3 move to and fro during the working operation, since in that case gliding between the teeth of the crown wheel and of the honing pinion always occurs.
- the honing pinion 3 ' has straight teeth 6• , while the crown wheel 1' is provided with helical (non-radial) teeth
- the crown wheel to be honed is indicated by 11, the teeth of the crown wheel by 12, the honing pinion by 13, the axis of the crown wheel by 14, the axis of the honing pinion by 15, and the teeth of the honing pinion by 16.
- the tooth length of the teeth 12 of the crown wheel 11 is "£".
- the width of the honing pinion is "B”, while in Fig. 3 B « 3 I .
- the crown wheel 11 is driven so that it rotates (arrow 17) by means of the shaft 18, while a shaft 19 bearing the honing pinion 13 is fixed so that it rotates freely between two centre points 20 and 21 of a slide 22, which can be moved to and fro (arrows 24) along a guide.
- V ax ⁇ ii axial speed of the honing pinion 13
- V. ⁇ is approximately 0.66 V114 ⁇ ,.
- V ⁇ m is selected approximately equal to 0.5 V ⁇ ,
- V ⁇ i is approximately 0.33 V,, ⁇ . At these speeds sufficient slide between the honing pinion 13 and the crown wheel 11 is obtained at the position of the pitch cone.
- the slide 22 is moved, for example hydraulically or pneumatically, according to the speed profile shown in Fig. 4.
- a braking device 25 engages on the shaft 19 of the honing pinion and ensures that an essentially constant load is applied to the shaft 19 of the in principle freely rotatable honing pinion 13. If the position of the axis 15 of the honing pinion 13 is also held fixed relative to the crown wheel 11 and equal to the position of the axis of the working pinion relative to the crown wheel, the teeth 12 of the crown wheel 11 are worked at one side, while the teeth 16 of the honing pinion 13 press with an essentially constant force against the teeth 12 of the crown wheel.
- the tooth width of the teeth 16 of the honing pinion 13 is preferably smaller than the tooth width of the tool with which the crown wheel 11 is pre-worked.
- the tooth width of the teeth of the honing pinion is smaller than the tooth width of the teeth of an imaginary pinion with the same axis, the same diameter and the same number of teeth, of which the teeth rest with both flanks against the flanks of the teeth of the crown wheel. This prevents a tooth of the honing pinion from becoming jammed between two teeth of the crown wheel.
- the teeth 12 of the crown wheel are worked at the other side by reversing the drive direction 17 of the crown wheel 11.
- the crown wheel 11 is rotatably driven and the honing pinion 13 is in principle freely rotatable, while a braking device engages on the shaft 19.
- a braking device engages on the shaft 19.
- Very accurate crown wheels with a very high surface quality of the teeth are obtained by finishing crown wheels in the way described above by honing, the machining grooves intersecting and running in such directions that in use a good oil film is formed between the crown wheel and the pinion meshing therewith.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
For the finishing of hardened crown wheels in which a crown wheel (11) to be worked meshes with a cylindrical honing pinion (13) whose geometry corresponds to that of a working pinion which must be able to mesh with the worked crown wheel, either the crown wheel or the honing pinion is driven so that it rotates, while the honing pinion or the crown wheel is in principle freely rotatable. The crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis (15) of the honing pinion. The width of the honing pinion is greater than the length of the teeth (12) of the crown wheel, and the honing pinion is mounted so that it rotates on a slide (22) which is movable to and fro along a guide (23) in the axial direction of the honing pinion. The position of the axis of the honing pinion relative to the crown wheel is fixed. The tooth width of the teeth (16) of the honing pinion is such that there is play between the teeth of the honing pinion and the teeth of the crown wheel. The shaft of the honing pinion is braked by means of the braking device (25), so that during a specific direction of rotation of the crown wheel its teeth are worked at only one side. During the working process it is ensured that at least two teeth of the crown wheel are always meshing with the teeth of the honing pinion.
Description
Method for finishing hardened crown wheels.
The invention relates to a method for finishing pre- f worked, in particular hardened, crown wheels.
Crown wheels are gear wheels which are used in angle * drives with or without intersecting axes which may or may not
5 form an angle of 90° with each other. In this drive a cylindrical gear wheel with a straight or helical involute tooth system meshes with a crown wheel whose tooth shape is determined by the tooth shape of the cylindrical gear wheel when the latter is generating over the crown wheel. 10 The angle drive with crown wheel teeth has a number of special advantages over the bevel gear drive generally known and used, inter alia the absence of axial forces on the cylindrical gear wheel when it is made with straight teeth, a greater gear ratio being achievable, the relatively simple 15 adjustment, and the fact that a great transverse contact ratio can be achieved without special provisions.
Hardened crown wheels can be finished by grinding, but this is an expensive process, and the surface quality of the crown wheel teeth to be achieved by it is limited, and in
20 a number of applications inadequate for crown wheel drives which have to be low-noise.
A method for finishing pre-worked crown wheels is known from US Patent Specification 2,309,530, said method comprising making a pre-worked crown wheel to be worked mesh
25 with a cylindrical honing pinion of which the number of teeth and the shape of the tooth flanks correspond to those of a working pinion which has to be able to mesh with the finished crown wheel, either the crown wheel or the honing pinion being driven rotatably by an external drive element, while
* 30 the honing pinion or crown wheel meshing therewith is in principle freely rotatable, and the crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion.
In the known method the crown wheel to be worked
35 meshes with two honing pinions lying at opposite sides of the crown wheel in the axial direction. The crown wheel is
pressed in the axial direction towards the two honing pinions.
The disadvantage of the known method is that the finishing process, and in particular the surface pressure between the tooth flanks of the crown wheel and a honing pinion, fluctuates too greatly during the different contact situations, with the result that the necessary high surface quality of the crown wheel teeth cannot always be guaranteed.
The object of the invention is to provide an improved method by which very accurate crown wheels with a very high surface quality of the teeth can be obtained at reasonable cost.
This object is achieved by a method for finishing pre-worked, in particular hardened, crown wheels, comprising making a pre-worked crown wheel to be worked mesh with a cylindrical honing pinion of which the number of teeth and the shape of the tooth flanks correspond to those of a working pinion which must be able to mesh with the finished crown wheel, either the crown wheel or the honing pinion being driven rotatably by an external drive element, while the honing pinion or the crown wheel meshing therewith is in principle freely rotatable, and the crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion, and at least two teeth of the crown wheel are always in engagement with teeth of the honing pinion.
A method for honing gear wheels, in which a gear wheel to be worked meshes with a honing gear with internal toothing, and in which the honing gear is driven and the gear wheel is freely rotatable, is known per se as the Fassler gear wheel honing process. However, this known method has until now been used only for honing cylindrical gear wheels.
The invention is based on the realisation that a factor which has an influence on the high surface quality of the gear wheel teeth to be achieved by the Fassler honing process - namely the great coefficient of transverse contact between the honing gear with internal toothing and the gear
wheel to be worked, through which any flaws in individual teeth of the gear wheel to be worked are compensated for - is also present in a drive with a crown wheel and a cylindrical gear wheel meshing therewith. For, the coefficient of transverse contact between a crown wheel and a cylindrical gear wheel meshing therewith can be great enough. The coefficient of transverse contact is particularly great if helical teeth are used, so that the result to be achieved can be even better then. Very accurate crown wheels with a very high surface quality of the teeth, which can be subjected to very great stress and also produce low-noise drives, can be obtained by the method according to the invention.
The invention also relates to a device for finishing pre-worked crown wheels with the aid of a cylindrical honing pinion of which the number of teeth and the shape of the tooth flanks correspond to those of a working pinion which must be able to mesh with the finished crown wheel, comprising means for fixing the crown wheel to be worked and the honing pinion, in such a way that the crown wheel to be worked can mesh with the honing pinion, drive means for rotary driving of either the crown wheel or the honing pinion, the width of the honing pinion being greater than the length of the teeth of the crown wheel, the honing pinion being mounted so that it is in principle freely rotatable, and the crown wheel and the honing pinion being movable relative to each other in the direction of the axis of the honing pinion, and the device being provided with loading means for applying an essentially constant load in the direction of rotation to the shaft of the in principle freely rotatable honing pinion or crown wheel, and such that the working direction of the drive means and of the loading means is reversible.
The invention is explained in greater detail below with reference to the drawing, in which:
Fig. 1 shows schematically in cross-section and in elevation the disposition of a crown wheel to be worked and
a honing pinion interacting therewith, in which the axes of the crown wheel and the honing pinion intersect;
Fig. 2 shows an arrangement such as that in Fig. 1, in which the axes of the crown wheel and the honing pinion cross each other;
Fig. 3 shows schematically a device for honing a crown wheel; and
Fig. A shows a possible curve of the axial speed of the slide of the device of Fig. 3. Fig. 1 shows a crown wheel 1 which is hardened, and the teeth of which have to be finished by honing, in order to improve the surface quality of the teeth 2. The crown wheel 1 to this end meshes with a cylindrical honing pinion 3 whose geometry, in particular shape of tooth flanks, corresponds to that of a cylindrical working pinion which subsequently has to be able to mesh with the crown wheel. This means in the case of an involute tooth system that the base circle and the number of teeth of the honing pinion and the working pinion must be equal. The axis 4 of the crown wheel 1 intersects the axis 5 of the honing pinion. The honing pinion 3 has straight teeth 6 , and the teeth 2 of the crown wheel extend in the radial direction of the crown wheel. The honing pinion 3 can be a base element made of synthetic resin in which abrasive grains are embedded, or can be a steel base element set with diamonds or CBN grinding grains.
For honing of the teeth 2 of the crown wheel 1, either the crown wheel 1 or the honing pinion 3 meshing therewith is driven so that it rotates, while the other element, i.e. the honing pinion 3 or the crown wheel 1, is in principle freely rotatable. Here, in principle freely rotatable means that the other element is not driven externally. Crown wheel and honing pinion are not connected to each other externally. The connection is only through the meshing teeth of crown wheel and honing pinion. The teeth of the crown wheel are finished through the teeth of the honing pinion 3 gliding over the teeth 2 of the crown wheel 1, In order also to obtain a relative movement of the teeth of the
crown wheel and those of the honing pinion at the position of the pitch cone, the honing pinion 3 is moved to and fro in the direction of its axis 5 during the working operation. This movement is possible without further ado, since the honing pinion 3 is cylindrical, and is thus identical in shape in each cross-section at right angles to the axis.
Due to the fact that the coefficient of transverse contact between a crown wheel and a cylindrical pinion can be great enough, and several teeth of the crown wheel can thus be in contact simultaneously, any errors in individual teeth of the crown wheel will be compensated for during the honing.
In order to ensure that the coefficient of transverse contact between crown wheel and pinion is at least two, so that at least two tooth flanks of the crown wheel are always meshing with the honing pinion, the dimensioning of the crown wheel and the pinion must always be selected correctly, the most important parameters being the contacting tooth width, the number of teeth of the pinion, and the tooth number ratio between crown wheel and pinion. With the tooth width which is usual for crown wheels and normal pinion dimensions, a coefficient of transverse contact greater than two is achieved in, for example, a pinion with 10 teeth with a tooth number ratio greater than 8 and in a pinion with 20 teeth with a tooth number ratio greater than 1.7. If the crown wheel 1 and the honing pinion 3 are provided with helical teeth 5, 6 respectively, it is not necessary to make the honing pinion 3 move to and fro during the working operation, since in that case gliding between the teeth of the crown wheel and of the honing pinion always occurs.
The method described above can also be used if the axes of the crown wheel and of the honing pinion cross each other, as shown in Fig. 2.
The different parts are indicated here by the same reference numbers as in Fig. 1, but provided with an apostrophe.
The honing pinion 3 ' has straight teeth 6• , while the
crown wheel 1' is provided with helical (non-radial) teeth
2' . It is not necessary here either to make the honing pinion
3* move to and fro in the direction of its axis 5• during the working operation. During honing of the teeth of a crown wheel with straight teeth particularly good results are obtained if the honing pinion is moved to and fro in the direction of its axis at a speed which is approximately one third of the peripheral speed of the honing pinion. A device with which this can be achieved is shown schematically in Fig. 3.
In Fig. 3 the crown wheel to be honed is indicated by 11, the teeth of the crown wheel by 12, the honing pinion by 13, the axis of the crown wheel by 14, the axis of the honing pinion by 15, and the teeth of the honing pinion by 16. The tooth length of the teeth 12 of the crown wheel 11 is "£". The width of the honing pinion is "B", while in Fig. 3 B « 3 I .
The crown wheel 11 is driven so that it rotates (arrow 17) by means of the shaft 18, while a shaft 19 bearing the honing pinion 13 is fixed so that it rotates freely between two centre points 20 and 21 of a slide 22, which can be moved to and fro (arrows 24) along a guide. The stroke of the slide 22 is, for example, equal to 2 4. If (see also Fig. 3) : v pe*φ& — peripheral speed of the honing pinion 13 at the position of the pitch circle, Vjimi = the maximum relative sliding speed between the honing pinion 13 and the crown wheel 11 during the generation of the honing pinion 13 on the crown wheel 11, and
Vaxϊii = axial speed of the honing pinion 13, V.^ is approximately 0.66 VvaisΛ,.
If V^m is selected approximately equal to 0.5 V^,, V^ύi is approximately 0.33 V,,^. At these speeds sufficient slide between the honing pinion 13 and the crown wheel 11 is obtained at the position of the pitch cone.
The slide 22 is moved, for example hydraulically or
pneumatically, according to the speed profile shown in Fig. 4.
A braking device 25 engages on the shaft 19 of the honing pinion and ensures that an essentially constant load is applied to the shaft 19 of the in principle freely rotatable honing pinion 13. If the position of the axis 15 of the honing pinion 13 is also held fixed relative to the crown wheel 11 and equal to the position of the axis of the working pinion relative to the crown wheel, the teeth 12 of the crown wheel 11 are worked at one side, while the teeth 16 of the honing pinion 13 press with an essentially constant force against the teeth 12 of the crown wheel.
The tooth width of the teeth 16 of the honing pinion 13 is preferably smaller than the tooth width of the tool with which the crown wheel 11 is pre-worked. In other words, the tooth width of the teeth of the honing pinion is smaller than the tooth width of the teeth of an imaginary pinion with the same axis, the same diameter and the same number of teeth, of which the teeth rest with both flanks against the flanks of the teeth of the crown wheel. This prevents a tooth of the honing pinion from becoming jammed between two teeth of the crown wheel.
The teeth 12 of the crown wheel are worked at the other side by reversing the drive direction 17 of the crown wheel 11.
In the device of Fig. 3 the crown wheel 11 is rotatably driven and the honing pinion 13 is in principle freely rotatable, while a braking device engages on the shaft 19. In an alternative embodiment it is, however, also possible to drive the honing pinion rotatably and to make the crown wheel in principle freely rotatable and to make a braking device engage on the shaft of the crown wheel.
Very accurate crown wheels with a very high surface quality of the teeth are obtained by finishing crown wheels in the way described above by honing, the machining grooves intersecting and running in such directions that in use a good oil film is formed between the crown wheel and the
pinion meshing therewith.
Claims
1. Method for finishing pre-worked, in particular hardened, crown wheels, comprising making a pre-worked crown wheel to be worked mesh with a cylindrical honing pinion, the number of teeth and the shape of the tooth flanks of which correspond to those of a working pinion which must be able to mesh with the finished crown wheel, either the crown wheel or the honing pinion being driven rotatably by an external drive element, while the honing pinion or the crown wheel meshing therewith is in principle freely rotatable, and the crown wheel and the honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion, characterised in that during finishing of the crown wheel at least two teeth of the crown wheel are always meshing with teeth of the honing pinion.
2. Method according to claim 1, characterised in that during the finishing of the crown wheel the position of the axis of the honing pinion relative to the crown wheel is held fixed and equal to the position of the axis of the working pinion relative to the crown wheel, and an essentially constant load is applied to the shaft of the in principle freely rotatable honing pinion or crown wheel in the direction of rotation, so that the teeth of the crown wheel are worked at one side, while the teeth of the honing pinion press with an essentially constant force against the teeth of the crown wheel.
3. Method according to claim 2, characterised in that a honing pinion whose tooth width of the teeth is smaller than or at most equal to the tooth width of the tool with which the crown wheel is pre-worked is used.
4. Method according to claim 2, characterised in that for working the other side of the teeth of the crown wheel the direction of rotation of the driven crown wheel or honing pinion and the direction of the load on the in principle freely rotatable honing pinion or crown wheel are reversed.
5. Method according to claim 1, characterised in that the speed at which the crown wheel and honing pinion are moved to and fro relative to each other in the direction of the axis of the honing pinion is greater than 10 % of the peripheral speed of the honing pinion, and is preferably approximately one third of said peripheral speed.
6. Method according to claim 1, characterised in that a honing pinion whose width is greater than 1.5 times the length of the teeth of the crown wheel, and preferably approximately 3 times said length, is used.
7. Method according to claim 1, characterised in that the honing pinion used is made of a synthetic resin base element in which grinding grains are embedded.
8. Method according to claim 1, characterised in that a honing pinion made of a steel base element set with grinding grains is used.
9. Device for finishing pre-worked crown wheels using a cylindrical honing pinion, the number of teeth and the shape of the tooth flanks of which correspond to those of a working pinion which must be able to mesh with the finished crown wheel, comprising means for fixing the crown wheel to be worked and the honing pinion, in such a way that the crown wheel to be worked can mesh with the honing pinion, drive means for rotary driving of either the crown wheel or the honing pinion, the honing pinion being a width which is greater than the length of the teeth of the crown wheel, the honing pinion being mounted so that it is in principle freely rotatable, and the crown wheel and the honing pinion being movable relative to each other in the direction of the axis of the honing pinion, characterised in that the device is provided with loading means for applying an essentially constant load to the shaft of the in principle freely rotatable honing pinion or crown wheel in the direction of rotation, and in that the working direction of the drive means and of the loading means is reversible.
10. Device according to claim 9, characterised in that the tooth width of the teeth of the honing pinion is smaller than or at most equal to the tooth width of a tool with which the crown wheel is pre-worked.
11. Device according to claim 9, characterised in that the width of the honing pinion is greater than 1.5 times the length of the teeth of the crown wheel, and preferably about 3 times said length.
12. Device according to claim 9, characterised in that the honing pinion is a base element made of synthetic resin in which grinding grains are embedded.
13. Device according to claim 9, characterised in that the honing pinion is a steel base element set with grinding grains.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9100656 | 1991-04-15 | ||
| NL9100656A NL9100656A (en) | 1991-04-15 | 1991-04-15 | Method of finishing hardened crown wheels - involves rotating honing pinion having same geometry and meshing with hardened crown wheel |
| NL9101224 | 1991-07-11 | ||
| NL9101224A NL9101224A (en) | 1991-07-11 | 1991-07-11 | Method for the further treatment of hardened crown wheels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992018279A1 true WO1992018279A1 (en) | 1992-10-29 |
Family
ID=26646838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL1992/000073 WO1992018279A1 (en) | 1991-04-15 | 1992-04-15 | Method for finishing hardened crown wheels |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1992018279A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289815A (en) * | 1993-06-21 | 1994-03-01 | The Gleason Works | Method of dressing a threaded grinding wheel |
| NL9400166A (en) * | 1994-02-03 | 1995-09-01 | Crown Gear Bv | Method and tool for finishing (reworking) of crown wheels |
| EP0814281A3 (en) * | 1996-03-12 | 1998-07-29 | Allison Engine Company, Inc. | Epicyclic reduction gearbox |
| US6302356B1 (en) | 1998-08-21 | 2001-10-16 | Rolls-Royce Corporation | Helicopter two stage main reduction gearbox |
| WO2020057777A1 (en) * | 2018-09-18 | 2020-03-26 | Sew-Eurodrive Gmbh & Co. Kg | Method and device for producing a toothing of a toothed wheel with a tool |
| US10941836B2 (en) | 2017-03-28 | 2021-03-09 | Sikorsky Aircraft Corporation | Rotorcraft internal transfer member transmission |
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| US2112996A (en) * | 1935-09-12 | 1938-04-05 | Julian L Perkins | Machine for forming gears |
| US2309530A (en) * | 1940-12-20 | 1943-01-26 | Perkins Machine & Gear Co | Apparatus for forming gear teeth |
| US3085369A (en) * | 1959-03-03 | 1963-04-16 | Howard J Findley | Gear finishing |
| GB2155372A (en) * | 1984-03-08 | 1985-09-25 | Illinois Tool Works | Improving or forming curved tooth surfaces |
| FR2587254A1 (en) * | 1985-09-13 | 1987-03-20 | Sicmat Spa | Method for finishing gearwheels by grinding |
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1992
- 1992-04-15 WO PCT/NL1992/000073 patent/WO1992018279A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2112996A (en) * | 1935-09-12 | 1938-04-05 | Julian L Perkins | Machine for forming gears |
| US2309530A (en) * | 1940-12-20 | 1943-01-26 | Perkins Machine & Gear Co | Apparatus for forming gear teeth |
| US3085369A (en) * | 1959-03-03 | 1963-04-16 | Howard J Findley | Gear finishing |
| GB2155372A (en) * | 1984-03-08 | 1985-09-25 | Illinois Tool Works | Improving or forming curved tooth surfaces |
| FR2587254A1 (en) * | 1985-09-13 | 1987-03-20 | Sicmat Spa | Method for finishing gearwheels by grinding |
| DE8910726U1 (en) * | 1989-09-08 | 1991-01-10 | Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co, 8000 München | Machine for fine machining of tooth flanks of toothed workpieces |
Non-Patent Citations (1)
| Title |
|---|
| C. STRIEZENOU 'De kroonwielvertanding' 1988 , DISSERTATION UNIVERSITY OF TECHNOLOGY EINDHOVEN , EINDHOVEN (NL) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289815A (en) * | 1993-06-21 | 1994-03-01 | The Gleason Works | Method of dressing a threaded grinding wheel |
| NL9400166A (en) * | 1994-02-03 | 1995-09-01 | Crown Gear Bv | Method and tool for finishing (reworking) of crown wheels |
| EP0814281A3 (en) * | 1996-03-12 | 1998-07-29 | Allison Engine Company, Inc. | Epicyclic reduction gearbox |
| US6183388B1 (en) | 1996-03-12 | 2001-02-06 | Allison Engine Company, Inc. | Epicyclic face gear reduction gearbox particularly for a gas turbine engine |
| US6302356B1 (en) | 1998-08-21 | 2001-10-16 | Rolls-Royce Corporation | Helicopter two stage main reduction gearbox |
| US10941836B2 (en) | 2017-03-28 | 2021-03-09 | Sikorsky Aircraft Corporation | Rotorcraft internal transfer member transmission |
| WO2020057777A1 (en) * | 2018-09-18 | 2020-03-26 | Sew-Eurodrive Gmbh & Co. Kg | Method and device for producing a toothing of a toothed wheel with a tool |
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