GRINDING MACHINE FOR GRINDING OF WORKPIECES WITH AN INTERNAL PROFILE

Abstract

A grinding machine for grinding of workpieces with an internal profile, having a grinding arm in which at least one grinding wheel is supported for grinding of the profile of the workpiece and a reception which is arranged at the grinding machine for holding the grinding arm. To facilitate the change of the grinding arm and thereby nevertheless to ensure a precise position of the same relatively to the reception the invention proposes that the grinding arm comprises at least two clamping pins being spaced apart from another and that the reception comprises two corresponding recesses for the reception of the clamping pins, wherein in the reception locking means are arranged by which the clamping pins can be locked in the recesses so that the grinding arm is detachably fixed in a defined position relatively to the reception.

Claims

1. A grinding machine for grinding of workpieces with an internal profile, comprising a grinding arm in which at least one grinding wheel is supported for grinding of the profile of the workpiece and a reception which is arranged at the grinding machine for holding the grinding arm, wherein the grinding arm comprises at least two clamping pins being spaced apart from another and that the reception comprises two corresponding recesses for the reception of the clamping pins, wherein in the reception locking means are arranged by which the clamping pins can be locked in the recesses so that the grinding arm is detachably fixed in a defined position relatively to the reception, wherein the grinding arm comprises a driving shaft by which the grinding wheel can be driven, wherein the driving shaft is torque proof connected with a coupling element and wherein in the reception a driving element is arranged which can be brought into torque proof connection with the coupling element.

2. The grinding machine according to claim 1, wherein the coupling element is designed as profile element which comprises around the circumference a plurality of radial protruding projections, wherein the driving element comprises a shape which is complementary to this.

3. The grinding machine according to claim 1, wherein the coupling element is designed as part which projects from the base contour of the grinding arm, wherein the driving element in the reception comprises a recess for entry of the coupling element.

4. The grinding machine according to claim 1, wherein the rotational movement of the driving shaft is transmitted to a shaft via a belt or a chain which shaft is connected torque proof with the grinding wheel.

5. The grinding machine according to claim 1, wherein in the grinding arm and in the reception detachable coupling means are arranged for the transmission for a fluid under pressure.

6. The grinding machine according to claim 5, wherein the coupling means are designed for the transmission of oil or cooling lubricant.

7. The grinding machine according to claim 1, wherein in the grinding arm and in the reception detachable contact means are arranged for the transmission of electricity or of electrical signals.

8. The grinding machine according to claim 1, wherein at or in the grinding arm a storage element is arranged on which grinding arm specific data can be stored.

9. The grinding machine according to claim 8, wherein the storage element is designed as a RFID transponder.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0025] In the drawing:

[0026] An embodiment of the invention is shown. The only FIGURE shows at one hand a grinding arm for grinding of a not depicted workpiece with an internal profile and at the other hand a reception of the grinding machine for the grinding arm.

DETAILED DESCRIPTION OF THE INVENTION

[0027] In the FIGURE a reception 3 can be seen in the upper left region which is part of a grinding machine. In the right lower region of the FIGURE a grinding arm 1 is depicted which comprises a grinding wheel 2 by which a not shown workpiece with an internal profile can be ground (for example an internal gearing).

[0028] Reception 3 and grinding arm 1 are thereby shown in a not yet mounted, i.e. assembled position. When the reception 3 and the grinding arm 1 are mounted the surface 17 of the reception 3 gets in plane contact with the surface 18 of the grinding arm 1.

[0029] For a quick mounting of the grinding arm 1 at or in the reception 3 it is provided that the grinding arm 1 comprises two clamping pins 4 and 5 which are spaced apart from another; meanwhile the reception 3 comprises two corresponding recesses 6 and 7 for the reception of the clamping pins 4 and 5. Only schematically depicted are locking means 8 and 9 which are arranged in the reception 3 by which the clamping pins 4, 5 can be latched in the recesses 6, 7. By doing so the grinding arm 1 is detachably fixed relatively to the reception 3 in a defined position.

[0030] Concerning the design of the clamping pins 4, 5 and of the locking means 8, 9 reference is made to so-called zero-point clamping systems which are known as such in the state of the art so that their construction needs not to be explained at this point in detail.

[0031] When the two surfaces 17 and 18 are brought in plane contact, when thus the clamping pins 4 and 5 are inserted into the recesses 6 and 7, simultaneously a coupling of different elements takes place which are arranged at the or in the reception 3 as well as at or in the grinding arm 1.

[0032] An insofar important element is the coupling of the rotary drive for the grinding wheel 2. The grinding wheel 2 is supported at a shaft whichwhat is not depicted in the FIGURE, however reference is made insofar to EP 0 416 151 B1is driven by a belt which runs in the inner of the grinding arm 1 which belt runs around a belt pulley which is torque proof connected with the driving shaft 10. Furthermore, a coupling element 11 is torque proof connected with the driving shaft 10 which coupling element comprises a gear-like shape, i.e. several radial protrusions which are distributed around the circumference.

[0033] In the reception 3 a corresponding drive element 12 is provided which is driven around an axis of rotation which is perpendicular on the plane of projection by a not depicted motor. The driving element 12 has a shape corresponding to the shape of the coupling element 11, i.e. when the grinding arm 1 is placed onto the reception 3 the coupling element 11, which protrudes from the base contour of the grinding arm 1, enters into the driving element 12 so that a torque proof connection is established by which the driving shaft 10 and so the grinding wheel 2 can be driven.

[0034] To enhance the comfort of the change of the grinding arm as well as to reduce the error rate thereby furthermore (two pairs) coupling means 15, 16 and 19, 20 are provided at the grinding arm 1 and at the reception 3 respectively by which a fluidic coupling can be established between the reception 3 and the grinding arm 1. Via this fluidic coupling for example cooling lubricant can be guided to the grinding wheel and/or oil mist can be guided for the lubrication of the bearing to ensure a respective supply.

[0035] It is also possible that also more than two pair of said coupling means 15, 16, 19, 20 are provided to transmit further fluids; if there is no respective need for fluids to be transmitted also one pair of coupling means can be sufficient.

[0036] Furthermore, electrical contact means 13 and 14 are provided which also automatically get in contact at the mounting of the two surfaces 17 and 18 and allow that electrical energy and electrical signals respectively can be transmitted. Here, for example the electric coupling of a sensor system is relevant by which bursting of the driving belt can be detected. Also concerning the electrical contact means more than one pair can be provided.

[0037] Furthermore, a RFID transponder 21 and a corresponding RFID antenna 22 are provided to transmit in an easy manner data from the grinding arm 1 to the reception 3 and machine respectively. At the contact of the surface 18 of the grinding arm 1 at the surface 17 of the reception 3 the transponder and the antenna get in active connection.

[0038] To allow a reliable pre-alignment of the grinding arm 1 relatively to the reception 3 furthermore bolts or pins respectively 23 and 24 are provided at the grinding arm 1 for which respective bores 25 and 26 in the reception 3 are provided. Of course, insofar in kinematic inversion the bores can also be arranged in the grinding arm 1 and the bolts and pins respectively can be arranged in the reception 3.

[0039] While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.