Compound Linear Guide Having A Fastening Means

Abstract

The invention relates to a transfer system for transporting objects. It includes a guide rail, which has a light-metal main body and at least one guide element, which is connected to the light-metal main body and has a guide surface. A slide for accommodating at least one object and a bearing, which interacts with the guide element and supports the slide on the guide rail in such a way that the slide can move linearly is also included. The guide rail has at least one magnetic fastening means, which makes it possible to temporarily fasten the guide rail by means of a magnetic clamping device, in particular in order to process the guide surface.

Claims

1.-13. (canceled)

14. A transfer system for the transport of objects, comprising: a guide rail that has a light metal base body and at least one guide element connected to the light metal base body and having a guide surface; a slide for the reception of at least one object; and a bearing that cooperates with the guide element and that linearly displaceably supports the slide at the guide rail, with the guide rail having at least one magnetic fixing means that allows a temporary fastening of the guide rail by means of a magnetic clamping apparatus.

15. The transfer system in accordance with claim 14, wherein the guide rail has the at least one magnetic fixing means for the machining of the guide surface.

16. The transfer system in accordance with claim 14, wherein the at least one magnetic fixing means is areal.

17. The transfer system in accordance with claim 14, wherein the at least one magnetic fixing means is attached to at least one outer side of the guide rail.

18. The transfer system in accordance with claim 17, wherein the at least one magnetic fixing means defines a contact plane spaced apart from the outer side of the guide rail.

19. The transfer system in accordance with claim 14, wherein a respective at least one fixing means is provided at two outer sides of the guide rail.

20. The transfer system in accordance with claim 19, wherein the respective at least one fixing means are arranged inclined with respect to one another.

21. The transfer system in accordance with claim 14, wherein the guide rail engages around the slide at least partly from the outside.

22. The transfer system in accordance with claim 14, wherein the slide engages around the guide rail at least partly from the outside.

23. The transfer system in accordance with claim 14, wherein at least one fixing means is let into a groove.

24. The transfer system in accordance with claim 23, wherein the groove is trapezoidal.

25. The transfer system in accordance with claim 14, wherein the at least one magnetic fixing means is formed from a ferromagnetic or ferrimagnetic material.

26. The transfer system in accordance with claim 25, wherein the at least one magnetic fixing means is formed from steel or iron.

27. The transfer system in accordance with claim 14, wherein the bearing comprises at least one roller element bearing.

28. The transfer system in accordance with claim 27, wherein the bearing comprises at least one roller element bearing in the manner of a ball guide.

29. A method of machining a transfer system for the transport of objects, comprising the steps of: providing a guide rail that comprises a light metal base body and a magnetic fixing means that allows a temporary fastening of the guide rail by means of a magnetic clamping apparatus; fixing the guide rail in or at a machining apparatus by means of the magnetic clamping apparatus; machining the guide rail; and releasing the guide rail.

30. The method in accordance with claim 29, wherein the step of machining the guide rail comprises the machining of a guide element provided for supporting a slide at the guide rail.

31. The method in accordance with claim 29, wherein the step of machining comprises grinding a guide surface of the guide element.

32. The method in accordance with claim 30, wherein the step of machining comprises an introduction of the guide element into the guide rail.

33. The method in accordance with claim 32, wherein the guide element is introduced into the guide rail by rolling in or by adhesive bonding.

34. The method in accordance with claim 29, wherein the step of fixing of the guide rail is carried out by means of an electromagnet of the magnetic clamping apparatus.

Description

[0026] The invention will be described in the following using purely exemplary embodiments and with reference to the enclosed drawings. There are shown:

[0027] FIG. 1 a sectional view of a first embodiment of the transfer system in accordance with the invention;

[0028] FIG. 2 a sectional view of a guide rail in accordance with a second embodiment;

[0029] FIG. 3 a sectional view of a guide rail in accordance with a third embodiment;

[0030] FIG. 4 a sectional view of a guide rail in accordance with a fourth embodiment; and

[0031] FIG. 5 a flowchart of an embodiment of the method in accordance with the invention for machining a transfer system.

[0032] FIGS. 1 to 4 show different embodiments of a guide rail 10 that are equipped with a fixing means 12 for fixing the guide rail 10 to a magnetic clamping apparatus, not shown. The guide rails 10 are furthermore each equipped with two guide elements 14 that each have a guide surface 16. Each fixing means 12 and each guide element 14 is attached to a light metal base body 18 that is not magnetic.

[0033] FIG. 1 shows an embodiment in which the guide rail 10 has a U shape and partly engages around a slide 20 from the outside. The slide 20 on which the object to be transported is arranged is linearly displaceably supported at the guide rail 10 by means of a bearing 22. The bearing 22 comprises a plurality of roller elements 24 that are arranged between the guide element 14 at the guide rail side and a guide part 26 at the slide side and that are in contact with the guide surface 16. The guide element 14, the guide part 26 and the fixing means 12 are let into trapezoidal grooves that are shaped in the light metal base body 18 or in the slide 20 and are thus fixed in a shape matched manner.

[0034] The fixing means 12 have a height H that is greater than the depth T of the respective groove. The fixing means 12 thereby project out of the guide rail 10. If a plurality of fixing means 12 are attached to a surface, their exposed surfaces lie in one plane. As can be seen in FIG. 1, an additional fixing means 12 can be attached at the side to ensure a more precise positioning of the guide rail 10 on a magnetic clamping apparatus, not shown.

[0035] Countersinks 28 are furthermore present in the guide rail 10 to screw the guide rail 10, for example, tightly to a rack, not shown, on site.

[0036] The embodiments of the guide rail 10 shown in FIGS. 2 to 4 are engaged around from the outside by a slide, not shown. The guide elements 14 for this purpose lie on oppositely disposed outer surfaces of the guide rail 10. These embodiments essentially differ from one another by the cross-sectional shape of the guide elements 14. Whereas the guide element 14 shown in FIG. 2 has a trapezoidal base shape having a cut-out for the reception of roller elements 24, the guide elements 14 of the embodiments shown in FIGS. 3 and 4 have a substantially circular base shape. Chamfers (FIG. 3) or notches (FIG. 4) can be shaped at the substantially circular profile for the guiding of roller elements 24.

[0037] FIG. 5 shows a flowchart for a method of machining a transfer system for the transport of objects. In a first step, a guide rail 10 is provided. The guide rail 10 comprises a light metal base body 18 and a magnetic fixing means 12. The fixing means 12 makes it possible to temporarily fasten, i.e. to fix, the guide rail 10 by means of a magnetic clamping apparatus, not shown. In a second step, the guide rail 10 is fixed in or at a machining apparatus by means of the magnetic clamping apparatus. A magnetic field is generated for this purpose, for example by one or more magnets, in particular electromagnets, that cooperates with the magnetic fixing means 12 and provides a firm, force-transmitting connection between a machining apparatus and the guide rail 10.

[0038] The guide rail 10 is subsequently machined in a third step. This step can comprise the introduction of a guide element 14, the grinding of a guide surface 16 of the guide element 14 as well as additional and/or alternative machining steps. On completion of the machining, the guide rail 10 is released from the machining apparatus again by a deactivation of the magnetic clamping apparatus, for example by switching off the electromagnet(s). Another section of the guide rail 10 or another component can now be machined.

[0039] It is possible by the method described above to machine the guide rail 10 without it being tensioned or even deformed by spot loads such as occur with compound linear guides clamped in a known manner. If the guide rail 10 is substantially installed in a transfer system, it is ensured that it is aligned exactly as it was during the machining. This is in particular of importance if the step of machining comprises the machining of the guide element 14, in particular of the guide surface 16. The exactly fitting installation of the guide rail 10 is therefore ultimately substantially simplified. A readjustment of the rail 10 is as a rule no longer necessary on the assembly.

[0040] Whereas the machining of a guide rail 10 and a subsequent attachment of the guide rail 10 to a transfer system is described here, it is also conceivable to machine a total module, comprising a plurality of guide rails 10 connected to one another, with the aid of the described method.

[0041] It can therefore be stated in summary that it is inter alia ensured by the tension-free or twist-free temporary fastening of the guide rail 10, that is made possible by the at least one magnetic fixing means 12, that the at least one guide surface 16 is in the same position or at least in a well-defined position with respect to a reference surface or a reference system in both a machining state and a state of use. The machining of the guide rail 10 is thereby substantially simplified and the precision of the components decisive for the guiding of the slide 20 is increased.

REFERENCE NUMERAL LIST

[0042] 10 guide rail [0043] 12 fixing means [0044] 14 guide element [0045] 16 guide surface [0046] 18 light metal base body [0047] 20 slide [0048] 22 bearing [0049] 24 roller element [0050] 26 guide part [0051] 28 countersink