Indian Patents. 256704:ROTOR AND ROTOR HOUSING FOR A CAMSHAFT ADJUSTER AND PRODUCING METHOD

Title of Invention	ROTOR AND ROTOR HOUSING FOR A CAMSHAFT ADJUSTER AND PRODUCING METHOD
Abstract	Rotor (2) and/or rotor housing (1) for a camshaft adjuster for motor vehicle engines and method for manufacturing it.

Full Text	FORM 2 THE PATENT ACT 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13) 1. TITLE OF INVENTION VARIABLE DRIVE FOR CAMSHAFTS APPLICANT(S) a) Name b) Nationality c) Address NEUMAYER TEKFOR HOLDING GMBH GERMAN Company WILHELM-ZANGEN-STR.9, 77756 HAUSACH GERMANY 3. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed : - ENGLISH TRANSLATION VARIFICATION CERTIFICATE u/r. 20(3)(b) I, Mr. HIRAL CHANDRAKANT JOSHI, an authorized agent for the applicant, NEUMAYER TEKFOR HOLDING GMBH do hereby verify that the content of English translated complete specification filed in pursuance of PCT International application No. PCT/DE2006/001454 thereof is correct and complete. The invention relates to components, such as rotors and/or rotor housings for a camshaft adjuster, and methods for producing such components for motor vehicle engines, in which the rotor, with blades that extend radially outwardly from a rotor core engages in chambers of the rotor housing formed by webs that extend radially inwardly from the outer housing wall, and the contours of at least one of the components consist of or are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy. The Japanese publication JP 2002-180809 discloses a valve drive for a motor vehicle whose rotor and housing are made of an extruded aluminum alloy. The blank is cut to the desired length and then machined in a cutting and polishing process. To ensure fast and cost-effective production, it has also been proposed to produce a component blank for items of the above-mentioned type by separating a, or the, continuous casting or section and, in a forming operation using a die, either before or after separation, calibrating the component to the desired dimension as described in the German laid open application DECS 10200401659 Al. The object of the invention was to fashion such parts cheaply and optimally, to make production still faster and more cost-effective and in doing so to integrate additional functions. According to the invention, this object is achieved in components of the aforementioned type by producing not only the above contours by continuous casting or extrusion from a metal alloy, particularly a light metal alloy, but also grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side, and axial through-holes 1.6 - 1.6'" for fasteners in the rotor housing 1 in the area of the webs 1.4 - 1.4'". Furthermore, not only at least one of the component blanks is calibrated to the required dimensions, particularly the final dimensions, in a forming process using a die, but also at least four of the following countours: in the rotor, the grooves for seals that extend axially along the blades on the radially outward side, in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward inside, in the rotor, a channel-shaped or tunnel-shaped opening that extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the radially outward extent of the blade. in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends in one of the webs at least approximately radially from one of the end faces and ends in front of the radial extent of the rotor housing. in the rotor housing, the axially extending openings for fasteners. In £ further inventive concept, a method as claimed in claim 2 can be suitable to produce a component of the above-mentioned type. However, according to yet another inventive concept, components of the above-mentioned type can also be characterized by a configuration as claimed in claim 3 and can be produced using the method according to the invention proposed in claim 4. The invention will now be described in greater detail with reference to the embodiment depicted in the figure. The components 1 and 2 illustrated here include a housing 1, which accommodates a rotor 2. Both the housing 1 and the rotor 2 are arranged coaxially to a camshaft (not depicted) or coaxially to the center axis 3 of the camshaft. The rotor 2 and the housing 1 are in operative engagement by means of radially extending surfaces 2.3, 1.3. By an adjustment mechanism (not depicted), the relative angular position between the rotor 2 and the housing 1 is altered in reference to the center axis 3 during operation. To this end, the rotor 2 has four blades 2.2 - 2.2'" that extend from the rotor body 2a and are arranged within corresponding recesses or chambers 1.2 - 1.2'", which are formed by webs 1.4 - 1.4'" of the rotor housing 2. It is also feasible to provide a different number of blades with corresponding recesses. On the radially outward side the blades 2.2 - 2.2'" of the rotor 2, and on the radially inward side the webs 1.4 -1.4'", are each provided with axially extending grooves 2.5 - 2.5'" and 1.5 -1.5'". It may also be advantageous to form, again by calibrating, a channel-shaped or tunnel-shaped opening 2c in the end face 2b of one of the blades, namely 2.2'" of the rotor 2, which opening extends at least approximately radially and ends in front of the radially outward extent of the blade. On the radially inward side this opening ends in the central bore 2d. It is particularly advantageous to make this blade 2.2'" wider in circumferential direction than the other blades and to design the chamber(s) accordingly. At least to that extent, the resulting design of the components is irregular. According to a particularly advantageous further development of the invention, the through-holes for receiving fasteners, such as screws, are likewise produced by continuous casting or extrusion and subsequent calibration. Essential in the production process are the dimensions of the blades 2.2, the openings 2c and the grooves 1.5 and 2.5, which like the opening 2c can be shaped or calibrated to the final dimensions in a forming process using a die after continuous casting or extrusion and separation. It may also be advantageous, however, to form even the grooves 1.5 in the housing 1 and the grooves 2.5 in the rotor 2 to the final dimensions by continuous casting or extrusion and optionally only to form the opening 2c by calibration. WE CLAIM: 1. A rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from the rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the housing wall toward the rotor core, and these contours of at least one of the components are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy, wherein, in addition, grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing in the area of the webs are formed by continuous casting or extrusion, and not only the at least one of the component blanks is calibrated to the required dimensions of the component in a forming process using a die but also at least four of the following contours: - in the rotor, the grooves for seals that extend axially in the blades on the radially outward side, - in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side, - in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the outer extent of the blade, or: - in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing, - the openings for fasteners. 2. A method of producing a rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these contours of at least one of the components are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy, wherein, in addition, grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side, and axial through-holes for fasteners in the rotor housing in the area of the webs are formed by continuous casting or extrusion and, thereafter, a) a component blank is produced by separating the continuous casting or the extruded part, and b) after separation, not only at least one of the component blanks is calibrated to the required final dimensions of the component in a forming process using a die, but also at least four of the following contours: in the rotor, the grooves for seals that extend axially in the blades on the radially outward side, in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side, in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the radially outer extent of the blade, or: in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing, - the openings for fasteners. 3. A rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these parts or contours, like the grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing in the area of the webs, are produced by continuous casting or extrusion, particularly from a light metal alloy, and at least four of the following contours are calibrated to the required dimensions in a forming process using a die: - in the component blanks, the rotor core with the radially outwardly extending blades and/or in the rotor housing the inner contour with the radially inwardly extending webs, - in the rotor, the grooves for seals that extend axially in the blades on the radially outward side, - in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side, - in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of the blades and ends in front of the radial extent of the blade, or: - in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in the area of one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing, - The openings for fasteners. 4. A method of producing a rotor and a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these contours, like the grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing 1 in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing 1 in the area of the webs, are produced by continuous casting or extrusion from a light metal alloy and, thereafter, a) a component blank is produced by separating the continuous casting or the extruded part, and b) after separation, at least one of the following contours is calibrated to the required final dimensions of the component in a forming process using a die: - in the rotor blanks, the rotor core with the radially outwardly extending blades and/or in the rotor housing the inner contour with the radially inwardly extending webs, - in the rotor, the grooves for seals that extend axially in the blades on the radially outward side, - in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side, - in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of at least one of the blades and ends in front of the radially outer extent of the blade, or: - in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends in one of the webs at least approximately radially from one of the end faces and ends in front of the radial extent of the rotor housing, - the openings for fasteners. ABSTRACT Rotor (2) and/or rotor housing (1) for a camshaft adjuster for motor vehicle engines and method for manufacturing it. To, The Controller of Patents, The Patent Office, Mumbai (Fifrl)

Full Text

FORM 2
THE PATENT ACT 1970 (39 of 1970)
&
The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13)
1. TITLE OF INVENTION
VARIABLE DRIVE FOR CAMSHAFTS

APPLICANT(S)
a) Name
b) Nationality
c) Address

NEUMAYER TEKFOR HOLDING GMBH GERMAN Company
WILHELM-ZANGEN-STR.9, 77756 HAUSACH GERMANY

3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed : -

ENGLISH TRANSLATION VARIFICATION
CERTIFICATE u/r. 20(3)(b)
I, Mr. HIRAL CHANDRAKANT JOSHI, an authorized agent for the applicant, NEUMAYER TEKFOR HOLDING GMBH do hereby verify that the content of English translated complete specification filed in pursuance of PCT International application No. PCT/DE2006/001454 thereof is correct and complete.

The invention relates to components, such as rotors and/or rotor housings for a camshaft adjuster, and methods for producing such components for motor vehicle engines, in which the rotor, with blades that extend radially outwardly from a rotor core engages in chambers of the rotor housing formed by webs that extend radially inwardly from the outer housing wall, and the contours of at least one of the components consist of or are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy.
The Japanese publication JP 2002-180809 discloses a valve drive for a motor vehicle whose rotor and housing are made of an extruded aluminum alloy. The blank is cut to the desired length and then machined in a cutting and polishing process.
To ensure fast and cost-effective production, it has also been proposed to produce a component blank for items of the above-mentioned type by separating a, or the, continuous casting or section and, in a forming operation using a die, either before or after separation, calibrating the component to the desired dimension as described in the German laid open application DECS 10200401659 Al.
The object of the invention was to fashion such parts cheaply and optimally, to make production still faster and more cost-effective and in doing so to integrate additional functions.
According to the invention, this object is achieved in components of the aforementioned type by producing not only the above contours by continuous casting or extrusion from a metal alloy, particularly a light metal alloy, but also grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side, and axial through-holes 1.6 - 1.6'" for fasteners in the rotor housing 1 in the area of the webs 1.4 - 1.4'". Furthermore, not only at least one of the component blanks is calibrated to the required dimensions, particularly the final dimensions, in a forming process using a die, but also at least four of the following countours:

in the rotor, the grooves for seals that extend axially along the blades on the radially outward side,
in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward inside,
in the rotor, a channel-shaped or tunnel-shaped opening that extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the radially outward extent of the blade.
in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends in one of the webs at least approximately radially from one of the end faces and ends in front of the radial extent of the rotor housing.
in the rotor housing, the axially extending openings for fasteners.
In £ further inventive concept, a method as claimed in claim 2 can be suitable to produce a component of the above-mentioned type.
However, according to yet another inventive concept, components of the above-mentioned type can also be characterized by a configuration as claimed in claim 3 and can be produced using the method according to the invention proposed in claim 4.
The invention will now be described in greater detail with reference to the embodiment depicted in the figure.
The components 1 and 2 illustrated here include a housing 1, which accommodates a rotor 2. Both the housing 1 and the rotor 2 are arranged coaxially to a camshaft (not depicted) or coaxially to the center axis 3 of the camshaft. The rotor 2 and the housing 1 are in operative engagement by means of radially extending surfaces 2.3,

1.3. By an adjustment mechanism (not depicted), the relative angular position between the rotor 2 and the housing 1 is altered in reference to the center axis 3 during operation.
To this end, the rotor 2 has four blades 2.2 - 2.2'" that extend from the rotor body 2a and are arranged within corresponding recesses or chambers 1.2 - 1.2'", which are formed by webs 1.4 - 1.4'" of the rotor housing 2. It is also feasible to provide a different number of blades with corresponding recesses. On the radially outward side the blades 2.2 - 2.2'" of the rotor 2, and on the radially inward side the webs 1.4 -1.4'", are each provided with axially extending grooves 2.5 - 2.5'" and 1.5 -1.5'".
It may also be advantageous to form, again by calibrating, a channel-shaped or tunnel-shaped opening 2c in the end face 2b of one of the blades, namely 2.2'" of the rotor 2, which opening extends at least approximately radially and ends in front of the radially outward extent of the blade. On the radially inward side this opening ends in the central bore 2d. It is particularly advantageous to make this blade 2.2'" wider in circumferential direction than the other blades and to design the chamber(s) accordingly. At least to that extent, the resulting design of the components is irregular.
According to a particularly advantageous further development of the invention, the through-holes for receiving fasteners, such as screws, are likewise produced by continuous casting or extrusion and subsequent calibration.
Essential in the production process are the dimensions of the blades 2.2, the openings 2c and the grooves 1.5 and 2.5, which like the opening 2c can be shaped or calibrated to the final dimensions in a forming process using a die after continuous casting or extrusion and separation.

It may also be advantageous, however, to form even the grooves 1.5 in the housing 1 and the grooves 2.5 in the rotor 2 to the final dimensions by continuous casting or extrusion and optionally only to form the opening 2c by calibration.

WE CLAIM:
1. A rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from the rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the housing wall toward the rotor core, and these contours of at least one of the components are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy, wherein, in addition, grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing in the area of the webs are formed by continuous casting or extrusion, and not only the at least one of the component blanks is calibrated to the required dimensions of the component in a forming process using a die but also at least four of the following contours:
- in the rotor, the grooves for seals that extend axially in the blades on the radially outward side,
- in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side,
- in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the outer extent of the blade, or:
- in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing,

- the openings for fasteners.
2. A method of producing a rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these contours of at least one of the components are produced from a continuous casting or an extruded part of a metal alloy, particularly a light metal alloy, wherein, in addition, grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side, and axial through-holes for fasteners in the rotor housing in the area of the webs are formed by continuous casting or extrusion and, thereafter,
a) a component blank is produced by separating the continuous casting or the extruded part, and
b) after separation, not only at least one of the component blanks is calibrated to the required final dimensions of the component in a forming process using a die, but also at least four of the following contours:
in the rotor, the grooves for seals that extend axially in the blades on the radially outward side,
in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side,
in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of one of the blades and ends in front of the radially outer extent of the blade, or:

in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing,
- the openings for fasteners.
3. A rotor and/or a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these parts or contours, like the grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing in the area of the webs, are produced by continuous casting or extrusion, particularly from a light metal alloy, and at least four of the following contours are calibrated to the required dimensions in a forming process using a die:
- in the component blanks, the rotor core with the radially outwardly extending blades and/or in the rotor housing the inner contour with the radially inwardly extending webs,
- in the rotor, the grooves for seals that extend axially in the blades on the radially outward side,
- in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side,
- in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of the blades and ends in front of the radial extent of the blade, or:

- in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially in the area of one of the webs from one of the end faces and ends in front of the radial extent of the rotor housing,
- The openings for fasteners.
4. A method of producing a rotor and a rotor housing for a camshaft adjuster for motor vehicle engines, wherein the rotor with blades extending radially outwardly from a rotor core engages in chambers of the rotor housing that are formed by webs extending radially inwardly from the outer housing wall toward the rotor core, and these contours, like the grooves that extend axially in the rotor in the blades on the radially outward side and/or in the housing 1 in the webs on the radially inward side and axial through-holes for fasteners in the rotor housing 1 in the area of the webs, are produced by continuous casting or extrusion from a light metal alloy and, thereafter,
a) a component blank is produced by separating the continuous casting or the extruded part, and
b) after separation, at least one of the following contours is calibrated to the required final dimensions of the component in a forming process using a die:

- in the rotor blanks, the rotor core with the radially outwardly extending blades and/or in the rotor housing the inner contour with the radially inwardly extending webs,
- in the rotor, the grooves for seals that extend axially in the blades on the radially outward side,

- in the rotor housing, the grooves for seals that extend axially in the webs on the radially inward side,
- in the rotor, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends at least approximately radially from one of the end faces in the area of at least one of the blades and ends in front of the radially outer extent of the blade, or:
- in the rotor housing, a channel-shaped or tunnel-shaped opening that functions as an oil duct and extends in one of the webs at least approximately radially from one of the end faces and ends in front of the radial extent of the rotor housing,
- the openings for fasteners.

ABSTRACT
Rotor (2) and/or rotor housing (1) for a camshaft adjuster for motor vehicle engines and method for manufacturing it.
To,
The Controller of Patents,
The Patent Office,
Mumbai
(Fifrl)

ROTOR AND ROTOR HOUSING FOR A CAMSHAFT ADJUSTER AND PRODUCING METHOD

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