DE8424074U1 - Tool holding device - Google Patents

Description

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MTU ENGINE AND TURBINE UNION
MUNICH GMBH

Munich, 3 August 1984

Tool holding device

The invention relates to a tool holding device with cooling and/or lubricant supply to the workpiece or tool of a machine for machining materials, in particular a machine tool.

With machine tools such as lathes, planing benches or other machines with cutting tools that have a coolant and/or lubricant supply, there is the problem that the coolant or lubricant does not have a free supply to the processing point, such as the interface, or that it is at least partially covered, e.g. by chips generated during processing. The well-known flow chips are particularly critical during continuous processing, as is desired in most cases.

If the outlet or the mouth of the channel is only partially covered by the chips that are created, which can easily happen if the channel is not designed properly, local overheating and usually even structural changes to the surface of the workpiece will occur. The chips can also be dangerous under certain circumstances.

The object of the invention is to remedy this situation, ESP-777

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and to create a solution for the cooling and lubrication problem of machine tools for machining materials, especially metals, in which the coolant or lubricant is supplied to the tool or its holder in such a way that it can no longer be disturbed from the outside. In particular not by the resulting chips.

This object is achieved by the features contained in claim 1. Further features of the invention can be found in the following claims and the description and drawing of an exemplary embodiment. The most important advantage achieved with the invention is that changes to the workpiece, in particular local overheating phenomena, e.g. on the surface, are avoided, longer service lives of the tools and/or their cutting edges are achieved and the coolant or lubricant is used more effectively. Last but not least, it should be emphasized that the clever channel design for the coolant or lubricant supply significantly shortens the set-up and changeover or changing times for tools and/or holders.

An embodiment of the invention is shown purely schematically in the accompanying drawing.

Show it:

Fig. 1 shows a tool holder according to the invention in view,

Fig. 2 a section along the line II-II in Fig. 1,

Fig. 3 a top view of the tool holder

ESP-777
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-&dgr;-Fig. 4 the counterholder for the cutting edge of the tool with outlet opening for the coolant/or lubricant.

B If the invention is explained below using the example of a lathe, it should be pointed out that it is by no means limited to this but can also be used with other types of machines for machining materials, such as drilling, milling, planing machines, etc.

The tool holder 1 can be firmly connected to a lathe with a driven shaft 2 and carries a tool 3 with a cutting edge 4. A channel 5 is incorporated into this tool 3 and is arranged at an angle to the horizontal plane of the surface 6 of the tool 3. In this plane, which is horizontal in the drawing, is also the mouth, i.e. the outlet opening for the channel 5. Of course, this outlet plane can also be arranged vertically depending on the tool holder and machine tool, but it can also be arranged at an angle that deviates from the vertical or horizontal.

It is important that the supply of the coolant or lubricant through the channel 5 with its extension 7 to the connection point 8 can be connected to a storage tank or a circulation system for a circuit.

This results in a high degree of variable application possibilities, in particular combination possibilities with different holding devices and/or machine tools, and a good and effective supply of coolant or lubricant directly to the machining point. The angle is also

ESP-777
3.8.1984

j is the angle between the central axis of the suction canal and the horizontal in the mouth area. The rake angle is designated by d .

Fig. 3 clearly shows how a flowing chip moves sideways away from the cutting tool. The fact that the cooling or lubricant jet is guided directly through the tool to the cutting point results in a constructive solution that is significantly more effective. The angle of impact of the liquid jet is selected so that 10

that the chip cannot cover the outlet opening of the feed channel. The outlet opening 9 of the channel is advantageously essentially oval and results from the oblique cut of the channel 5 in the plane of a surface of the cutting edge 4, which produces the chip 10. The mouth

15

has the shape of a nozzle 13 in part 11 in extension of the recess 12...

Of course, any desired cutting edge can be used.

\ knew, especially carbide cutting edges are used.

20 The tool 3 can be a common steel if the _invention is applied to a lathe, however

' also planes, milling cutters ₄ drills or other cutting tools

The cutting edge 4 is clamped by the counterholder 11 (Fig.4) by means of the screw 14.

25

Depending on the application, the holder 1 can be designed to suit the purpose in order to ensure suitable holding of tools.

h tool and/or cutting edge. The connection of the

£ Channel 5 at connection point 8 should be designed in such a _way that a tool change can be carried out as simply as possible in the shortest possible time.

Coolants and/or lubricants can also be of a known type; these can be selected within wide limits, depending on the workpiece used, its material and the tools or cutting edges of the respective machine tool.

:s ESP-777

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If circulation of the coolant or lubricant is desired, a pump is useful for generating sufficient jet pressure when the substance exits channel 5. The flow rate _/ volume and/or _time can be controlled in a conventional manner.

The lubricant can be used not only for lubrication and/or cooling but also for heating or other tempering if a suitable tempering agent is used. It is also possible to heat or cool the tool and/or workpiece separately, e.g. using electric heaters or Peltier elements or using air from a blower or fan. In the latter case, the chip, e.g. flowing chip, can also be blown onto it.

Such measures can also be combined with suction of chips, dust or other particles including excess lubricant.

Combinations of the described, illustrated }

and claimed features both among themselves and \

even with known characteristics belong to the '

Scope of the invention. &iacgr;

ESP-777 3.8.1984

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Claims (5)

zw/si MTÜ MOTOREN- UND TURBINEN-UNION MÜNCHEN GMBH Munich, 3.8.1984 Protection claims 1. Tool holding device with cooling and/or lubricant supply to the workpiece and/or tool in a machine for machining material, characterized in that a cooling and/or lubricant supply channel is arranged in the tool and/or its holder which opens at an angle between the tool cutting/cutting surface and the chip. 2. Tool holder according to claim 1, characterized in that the outlet opening of the lubricant supply channel is led directly to the cutting point and opens into a plane of a surface (cutting surface) of the cutting edge and/or the holder. 3. Tool holder according to claim 1, characterized in that the cooling and/or lubricant supply channel at least in the region of its mouth assumes an acute angle to the surface of the cutting edge or cutting surface. 4. Tool holder according to one of the preceding claims, characterized in that the feed opening is designed like a nozzle. ESP-777 1 5. Tool holder according to one of the preceding claims, characterized in that partial areas in the tool cutting edge, in the tool, in the tool holder have a continuous channel from the interface to the 5 Connection point to a reservoir or a circulation system with continuous, particularly aligned transitions. 35 ESP-777 3.8.1984 · ♦ It» ••If·*·