Side Milling Cutter and Production Method

Abstract

The invention relates to a side milling cutter (1) which comprises a disk body (11) with a central hub (12) for accommodation in a milling drive, and a plurality of cutters (21) which are arranged on the outer periphery thereof. A plurality of inner cooling lubricant channels (3) extend in the disk body (11), said channels having two or more outlet openings (31) in the area of each cutter (21). Said outlet openings (31) are oriented such that a cooling lubricant jet (K) which exits from the cooling lubricant channel (3) can be directed to the cutter (21). The invention also relates to a production method for the side milling cutter (1).

Claims

1-15. (canceled)

16. A generatively produced side milling cutter (1), comprising: a disk body (11) comprising a central hub (12) to be received in a milling drive and further comprising a plurality of cutting lips (21) on an outer circumference of the disk body (11), the disk body (11) further comprising a plurality of internal cooling lubricant passages (3) extending through the disk body (11); each of the cooling lubricant passages (3) having at least two outlet openings (31, 31′) in the region of each cutting lip (21); the at least two outlet openings (31, 31′) arranged such that in each case one cooling lubricant jet (K), which emerges from the cooling lubricant passage (3), is able to be directed onto the cutting lip (21); the at least two outlet openings (31, 31′) configured to direct the cooling lubricant jets (K) onto the cutting lip (21) with a predetermined angular offset in order to support the transporting away of chips and to cool the disk body (11); wherein at least one of the cooling lubricant jets (K) is directed at a chip detachment zone of the cutting lip (21) during operation.

17. The side milling cutter (1) as claimed in claim 16, wherein the at least two outlet openings (31, 31′) are configured to direct one cooling lubricant jet (K), respectively, onto the cutting lip (21) from different sides or from opposite directions.

18. The side milling cutter (1) as claimed in claim 16, wherein at least one of the outlet openings (31, 31′) comprises a nozzle.

19. The side milling cutter (1) as claimed in claim 18, wherein the nozzle is inserted into the at least one outlet opening (31, 31′).

20. The side milling cutter (1) as claimed in claim 18, wherein the nozzle is an angularly adjustable nozzle.

21. The side milling cutter (1) as claimed in claim 16, wherein the disk body (11) has a thickness in the range from 1 mm to 20 mm

22. The side milling cutter (1) as claimed in claim 21, wherein the thickness is in a range from 2 mm to 12 mm.

23. The side milling cutter (1) as claimed in claim 16, wherein the internal cooling lubricant passages (3) extend in a star shape away from the hub (12).

24. The side milling cutter (1) as claimed in claim 16, wherein the internal cooling lubricant passages (3) emerge from a lateral face (111) of the disk body (11).

25. The side milling cutter (1) as claimed in claim 16, wherein the internal cooling lubricant passages (3) emerge obliquely from a surface of the disk body (11).

26. The side milling cutter (1) as claimed in claim 16, wherein the internal cooling lubricant passages (3) have at least one deviation (32) that is preferably arranged in an end portion (33) close to the outlet opening (31) and is preferably rounded or curved.

27. The side milling cutter (1) as claimed in claim 16, wherein the cooling lubricant passages (3) have a feed opening (34) for cooling lubricant at an inner face of the hub (12) or at a disk face, wherein the feed opening (34) is fluidically connectable to a cooling lubricant source, wherein the cooling lubricant passages (3) each extend from the feed opening (34) to the outlet opening (31).

28. The side milling cutter (1) as claimed in claim 27, wherein an encircling groove (122) is present on the inner face (121) of the hub (12), the cooling lubricant passages (3) leading into the encircling groove (122), wherein the encircling groove (122) forms a sealable coupling portion for fluidically connecting to the cooling lubricant source.

29. The side milling cutter (1) as claimed in claim 16, wherein the cutting lips (21) are exchangeable cutting inserts (2), wherein the disk body (11) comprises cutting insert seats (112) on the outer circumference of the disk body (11), wherein the exchangeable cutting inserts (2) are arranged in the cutting insert seats (112).

30. The side milling cutter (1) as claimed in claim 29, wherein the cutting insert seats (112) each comprise a slot (113) extending radially inward in the disk body and configured to provide damping elasticity.

31. A method for producing a side milling cutter (1) as claimed in claim 16, using a generative production device, comprising the steps of: a) loading a 3D volume data set, which describes at least the disk body (11) with the central hub (12) of the side milling cutter (1), into the generative production device, b) providing a pulverulent starting material, c) progressively generating material cohesion of the pulverulent starting material, including progressively producing the disk body (11) comprising the plurality of internal cooling lubricant passages (3), including at least two outlet openings (31, 31′) in the region of each cutting lip (21), and comprising the central hub (12), and d) subsequently internally smoothing the cooling lubricant passages (3) by flow grinding.

32. The method as claimed in claim 31, further comprising melting the pulverulent starting material in step c).

33. The method as claimed in claim 31, wherein the pulverulent starting material is a metal powder.

34. The method as claimed in claim 31, wherein the generative production device is a device for selective laser melting, selective laser sintering or laser build-up welding.

Description

IN THE FIGURES

[0042] FIG. 1 shows a perspective view of a side milling cutter (not according to the invention),

[0043] FIG. 2 shows a perspective view of the side milling cutter according to the invention.

[0044] Hidden edges are shown in FIG. 1 and FIG. 2. The side milling cutter 1 has a disk body 11 and a hub 12 which are formed integrally, wherein the hub 12 is provided to be received in a milling drive and is configured as a cylinder placed coaxially on the disk body 11. Provided at regular angular spacings on the outer circumference are several cutting lips 21 which are configured as part of indexable cutting inserts 2. The indexable cutting inserts 2 are each received in an exchangeable manner in a cutting insert seat 112 which is present in the disk body 11 and the shape and dimensions of which correspond to the indexable cutting insert to be received.

[0045] A respective slot 113 extends radially inward from the cutting insert seats 112, said slots 113 being intended to provide sufficient elasticity for clamping the indexable cutting insert 2 in place. In order to create the clamping force, this not being shown in the figures, a clamping screw or the like can be provided, which exerts a clamping force on the cutting insert seat 112. The “closed end” of the slot 113 is rounded, whereby the notch effect at the slot end is intended to be reduced.

[0046] Inside the disk body 11, internal cooling lubricant passages 3, which extend in a star-shaped manner away from the hub 12, extend to each of the cutting lips 21. In the region of the cutting lips 21, the cooling lubricant passages 3 each emerge from the lateral face 111 of the disk body 11. The outlet opening 31, or the course of the cooling lubricant passage 3 at the outlet 31, is selected in this case such that a cooling lubricant jet K can be directed onto the cutting lip 21. To this end, the cooling lubricant passage 3 emerges obliquely from the surface of the disk body 11, this being achieved by the curve 32 which is arranged in the end portion 33 close to the cutting lips 21.

[0047] FIG. 2 shows the solution according to the invention, in which two cooling lubricant passages 3 extend to each cutting lip 21. It is possible according to the invention, but not shown, for there to be more thereof. Thus, the cutting lip 21 is cooled from several sides and from different angles. To this end, in one alternative, the cooling lubricant passages 3 have branches from which two or more subpassages 3′ proceed, which lead into the respective outlet openings 31, 31′. These outlet openings 31, 31′ make it possible to apply a cooling lubricant jet K to the cutting lip 21 from different directions, i.e. at a particular angular offset. Provision can even be made for the other outlet opening 31′ to be present on an opposite side of the cutting insert seat 112 from the cutting insert 2. The branch of the cooling lubricant passage K can in this case be located close to the outlet openings 31, 31′ or closer to the hub 12.

[0048] However, it is not absolutely necessary for the two outlet openings 31, 31′ to be supplied by a passage branch, rather, in another alternative, an independent cooling lubricant passage 3 can also extend in each case to the feed openings 122 or into the groove 34, this also being shown in FIG. 2. With regard to the passage design, FIG. 2 indicates several possible embodiments in a single side milling cutter 1 here—in an actual side milling cutter 1, only one possible design is selected for all the passage configurations leading to the cutting inserts 21 for economical production. Thus, FIG. 2 shows several possibilities for the passage configuration only be way of example here.

[0049] The cooling lubricant passages 3 are supplied with cooling lubricant in that they extend as far as an inner face 121 of the hub 12 and emerge from the surface there in feed openings 122, which are in turn connected to a cooling lubricant source. Via the hub 12, the side milling cutter 1 is also connected to the milling drive, such that, via a driveshaft introduced into the hub 12, the cooling lubricant can also be fed without problems. In this case, it is also possible for all the feed openings 122 of the side milling cutter 1 to be supplied from a cooling lubricant opening in the driveshaft, wherein, to this end, the encircling groove 34 is provided, as it were as a distributor. The region around the groove 34 can be sealed via O-rings.

[0050] The side milling cutter 1 according to the invention is produced via a generative production method, since it cannot be obtained by conventional casting and cutting production methods, this being in particular on account of the fine curved passage structure and comparatively small thickness of the disk body. For production, use can be made for example of selective laser melting, whereby the disk body can be produced together with the hub with little mechanical reworking. The device for selective laser melting can be removed as it were from the finished side milling cutter 1, and all that is still necessary is to insert the indexable cutting inserts 2 and to clean off residual pulverulent starting material.