DE20310134U1 - Parallel key groove machining or producing device includes cassette to which cutting plates are attached and from which they can be detached - Google Patents

Abstract

The machining device produces or works on a parallel key groove (10). It includes a cassette (2) to which cutting plates are attached and from which they can be detached. More than one edge of the cutting plate may be used for cutting at the same time. The cutting plates may be fixed to at least one side wall of the cassette.

Description

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Device for machining and/or producing a keyway

Description:

The invention relates to a device for machining and/or producing a keyway.

Devices for producing a keyway are known from the website www.froemaq.com , where a knife with a cutting edge is provided. The disadvantage is that the service life is short and production is therefore expensive. In addition, changing the knife is time-consuming and therefore also expensive.

The invention is therefore based on the object of developing a device while avoiding the aforementioned disadvantages. In particular, the service life should be increased and the costs reduced.

According to the invention, the object is achieved in the device according to the features specified in claim 1.

Essential features of the invention in the device are that the device is provided for machining and/or producing a keyway and that the device comprises a cassette to which cutting plates can be detachably connected.

The advantage here is that several cutting edges are used in one stroke movement, meaning that more material can be removed and the feed and service life can be increased. In particular, a respective cutting plate can be replaced after it has worn out or rotated 180° to change a working edge of the cutting plate. In addition, the cassette can be exchanged for another cassette, which means that the type of machining can be changed, i.e. instead of just machining the groove flanks, the groove base or even the entire groove can be machined. A cassette can even be exchanged for a cassette with cutting plates that can be used for soft machining instead of hard machining.

ECG\ET OAGRUPPENKFEaS-RECHTEXDokiAPtSWNSIS/ 002.doc 07/01/2003

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In an advantageous embodiment, more than one cutting edge, i.e. edge of a cutting plate, works simultaneously during machining and/or manufacturing. The advantage of this is that wear can be reduced and the service life can be increased.

In an advantageous design, the cutting plates are designed as indexable cutting plates. The advantage here is that a working and a non-working edge are interchangeable. This means that the entire cutting plate does not necessarily have to be replaced.

In an advantageous embodiment, the cutting plates are attached to at least one side wall of the cassette. The advantage here is that the groove flanks can be machined.

In an advantageous embodiment, at least one recess is provided as a chip space. The advantage here is that there is space for chips.

In an advantageous embodiment, at least one recess is provided as protection for a non-working edge of a cutting plate. The advantage here is that the second edge can be removed from the protected area and the working edge can then be replaced.

In an advantageous embodiment, the cassette is detachably connected to a pull rod. The advantage here is that the cassette can be exchanged for another cassette depending on the groove size and/or type of processing.

In an advantageous embodiment, the detachable connection is made by means of screws, in particular clamping or fastening screws. The advantage here is that the cassette and/or the cutting plates can be exchanged for others quickly and easily and thus inexpensively.

In an advantageous embodiment, several cutting plates are arranged one behind the other in the longitudinal direction of the cassette, with the next one engaging deeper into the workpiece. The advantage of this is that wear can be reduced and the feed and service life can be increased.

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In an advantageous embodiment, the material of the workpiece is hardened. The advantage here is that hard machining can be carried out using suitable cutting inserts.

In an advantageous design, the material of the workpiece is soft, i.e. unhardened. The advantage here is that, with suitably selected cutting inserts, soft machining of the workpiece is also possible.

In an advantageous embodiment, a keyway can be machined into the workpiece using the device from the solid material, i.e. from the solid and unhardened material of the workpiece. The advantage here is that no other pre-processing is necessary and the entire keyway can be machined from the solid material, i.e. the groove flanks and the groove base together. This reduces the processing time and therefore also the manufacturing costs.
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Further advantages arise from the subclaims.

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List of reference symbols

1 Pull rod 2 Cassette

4 clamping screw

5 Fixing screw

6 Recess for protection 10 Workpiece 13 Cutting plate

14 Cutting plate

15 Cutting plate

21 Cutting plate

22 cassette

23 Fixing screw

26 Recess as chip space

27 Recess for protection

31 Cutting plate

32 Cutting plate 33 Cutting plate

34 Cutting plate

35 cassette

36 fixing screws

37 Recess 25

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The invention will now be explained in more detail with the aid of illustrations:

Figures 1a, 1b and 1c show schematically a device according to the invention in front view, sectional view and plan view.
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A cassette 2 is attached to the pull rod 1 by means of fastening screws 5. The cutting plates (13, 14, 15) are screwed onto the cassette 2 in pairs by means of clamping screws 4 and are thus detachably connected to it. The cutting plates (13, 14, 15) are arranged in the longitudinal direction of the cassette 2. The cutting plate 14 is arranged slightly higher than the cutting plate 15 and the cutting plate 13 is slightly higher than the cutting plate 14. When the cassette 2 is pulled through the workpiece 10, the cutting plates engage one after the other and the cutting plate 13 is sunk deeper into the workpiece 10 than the cutting plate 14, which in turn is also sunk deeper into the workpiece 10 than the cutting plate 15.

The device is particularly advantageous for hard machining of a keyway. For this purpose, the keyway is pre-machined during soft machining, for example, cleared, slotted or milled, and must be finished using hard machining after the subsequent hardening, because the hardening distortion changes the geometric shape created during soft machining. It is advantageous for the cutting plates to be made of a suitably hard material for hard machining.

When the cassette 2 is pulled through with the cutting plates (13, 14, 15), these cut the groove flank of the keyway, i.e. the side surfaces of the keyway, with their working edges.

Advantageously, the cutting plates (13, 14, 15) are manufactured with two edges, the first of which is intended for machining and the second is located in a recess 6 for protection. After the working edge has worn out, the cutting plate can be rotated by 180° after loosening it and then re-fastened after turning. The second edge is then used for work. In this way, the service life of the cutting plate can be increased.

The working edge has a smaller edge length than the length of the other edges of the respective cutting plate that are perpendicular to this edge.

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As shown in Figure 1a, a recess functioning as a chip space is provided in front of the working edge of each of the cutting plates (13, 14, 15).

Because the working edges of the three cutting plates (13, 14, 15) engage one after the other when pulling through the workpiece 10, a longer service life can be achieved and the costs can be reduced, especially in comparison with the prior art.

In further embodiments according to the invention, more cutting plates or fewer cutting plates (13, 14, 15) can also be provided.

In Figures 2a, 2b and 2c, another device according to the invention is shown schematically in front view, sectional view and plan view.

A cassette 22 is attached to the drawbar 1 by means of fastening screws 23. The cutting plates 21 are screwed as a pair to the side walls of the cassette by means of clamping screws. The working edge of the cutting plates 21 has a greater edge length than the thickness of the cutting plates. The device is therefore particularly suitable for machining a deeper keyway.

In front of the cutting plates 21, a recess 26 is arranged as a chip space on the side of the cassette and on the non-working edge there is again a small recess 27 to protect this non-working edge.
25

By means of a 180° rotated fastening, the working and non-working edges can be exchanged to increase service life.

The device according to Figures 2a, 2b, 2c can also be advantageously used for hard machining.

In further embodiments according to the invention, several cutting plates 21 are arranged one behind the other, which, when pulled through the keyway, each penetrate deeper into the

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Workpiece. In particular, the recesses 26 and 27 are also provided accordingly.

Figures 3a, 3b and 3c show schematically a device according to the invention in front view, sectional view and plan view.

A cassette 35 is attached to the drawbar 1 by means of fastening screws 36. The cutting plates (31,32,33,34) are screwed onto the upper side of the cassette 35 by means of clamping screws and are arranged in the longitudinal direction of the cassette 35.

There are two types of cutting plates. The first type comprises the cutting plates 31 and 33. These are intended for machining the groove flanks with their short, short edges, as shown in Figures 1a, 1b, 1c. However, in the device according to Figures 3a, 3b, 3c, the longer edges of the cutting plates 31 and 33 also work.

33. These are used to machine part of the groove base of the keyway. The second type of cutting inserts, namely the cutting inserts 32 and 34, are arranged on the upper side of the cassette 35. The cutting inserts 32 and 34 thus machine the groove base in the middle with their longer sides.

In this way, when the cassette 35 is pulled through, the entire keyway, including the key flanks and key base, can be machined.

The cutting plate 31 engages slightly deeper into the workpiece than the cutting plate 33. The same applies to the cutting plate 34, which engages slightly deeper into the workpiece than the cutting plate 32. When the cassette 35 is pulled through the workpiece 10, the cutting plates thus engage one after the other. The chip volume per pull-through and the overall service life can therefore be increased.

The device can also be used for hard machining.

In further embodiments according to the invention, the device according to Figures 3a, 3b, 3c can even be used for soft machining. The keyway can be machined out of the solid material of the workpiece 10.

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The recess 37 serves to protect the non-working edge. The recess 38 serves as a chip space.

In further embodiments according to the invention, the cassette 35 can be made longer. This means that additional cutting plates can also be provided, with which the service life can be improved even further.

Claims (12)

1. Device for machining and/or producing a keyway, characterized in that the device comprises a cassette to which cutting plates can be detachably connected. 2. Device according to at least one of the preceding claims, characterized in that more than one cutting edge, i.e. edge of a cutting plate, works simultaneously during processing and/or manufacturing. 3. Device according to at least one of the preceding claims, characterized in that the cutting plates are designed as indexable cutting plates. 4. Device according to at least one of the preceding claims, characterized in that the cutting plates are fastened to at least one side wall of the cassette. 5. Device according to at least one of the preceding claims, characterized in that at least one recess is provided as a chip space. 6. Device according to at least one of the preceding claims, characterized in that at least one recess is provided as protection for a non-working edge of a cutting plate. 7. Device according to at least one of the preceding claims, characterized in that the cassette is detachably connected to a pull rod. 8. Device according to at least one of the preceding claims, characterized in that the detachable connection is made by means of screws, in particular clamping or fastening screws. 9. Device according to at least one of the preceding claims, characterized in that several cutting plates are arranged one behind the other in the longitudinal direction of the cassette, the next one being provided to engage deeper into the workpiece. 10. Device according to at least one of the preceding claims, characterized in that the material of the workpiece is hardened. 11. Device according to at least one of the preceding claims, characterized in that the material of the workpiece is soft, i.e. unhardened. 12. Device according to at least one of the preceding claims, characterized in that by means of the device a keyway can be machined in the workpiece from the solid, i.e. from the solid and unhardened material of the workpiece.