DE6607231U - TOOL FOR AB- OR. GROOVING WORK PIECES ON LATHE OR LATHE - Google Patents

Description

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DI _P l.-Phye. Eduard Betzier ⁵¹⁰¹⁴ Dipl.-Ing. W. Herrmann-Trentepohl _T1 f

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29th Olcbober 1970

Ie Gerhard iongv / itz, 97 Oonnaught Road> liervlei, OAPE SD0V / 1T, South Africa

Z ₀ Hans Longwitz, 10, Muller Str., Kuilsrever Cp, South Africa

"Tool for parting and grooving workpieces on lathes or banks "

The innovation concerns a parting or grooving of workpieces on lathes or lathes. serving tool that load from a tool blade with cutting tool and a holder stands on which the sheet is replaceable. ; '

The machining of workpieces on modern lathes requires a >;, on the other hand, the greatest possible parting or grooving speeds with relatively narrow cutting grooves, but on the other hand the avoidance of dynamic stresses on the workpiece or the tool ο Only in this way can those who speak Demands for the shortest possible processing times with high Quality of work and long service life of tools and steels be reconciled with each other.

The difficulties encountered with the very high piercing speeds sought represent a complex problem. As a rule, the cutting steel has to pierce or pierce on the fly over relatively large distances Breaking out or chopping off the cutting steel. The cutting performance, which increases significantly at high cutting speeds, leads to chips with very high erosion forces _e These can also destroy the tool in a short time. After all, the lathe operator must be able to quickly change the sibling steel without having to set up the tool every time

It is already a tool for parting or grooving on lathes or banks become known, the holder carries a tool blade with substantially parallel edges, the one side has the cutting steel. In addition, the holder has a fine counter-holder that rests on the rotating movement jist and provided with an armored sliding plate for this purpose tird. The piercing speeds that can be achieved with this device are not significantly higher than those with otherwise be ^ r |. known tools using simple tool sheets achieve -'- ' * "Baren" In addition, it can be because of the separated from the cutting steel . ■ Slide plate at high speed for the moment The entire tool and its holder will be destroyed.

The technical problem on which the innovation is based is particularly important in creating a tool suitable for parting or grooving workpieces on lathes or lathes, with which results in a considerable increase in the piercing speed with narrow piercing grooves while avoiding chatter stress can be achieved.

According to the basic idea of the innovation, this problem is solved in that the cutting steel is two at an angle to each other standing sheet edges are assigned, for the two counter bearings on the holder with parallel to the sheet edges Storage areas are provided.

These measures make it possible to control the feed forces and the fictional forces of the cutting-H-hflhi resulting from the machining to split up · to take up in a very narrow tool sheet and to transfer them safely to the bearing surfaces of the holder, so that the result is very high cutting performance become possible. In particular, the implementation of this fundamental innovation with the arrangement of three Sons of oath steels proved to be optimal on the tool sheet. According to Another feature of the innovation for this purpose are the cutting steels on the tool blade at equal radial distances from the center of the sheet, and each of them is a blunt diaper with the cutting steel karite enclosing chip trailing edge assigned. Then there is one triangular outline shape of the tool blade, in which at least QJeil areas of the two chip runoff edges of two adjacent ones Cutting tools that interact with the counter bearings on the holder Form the blade edges of the third cutting steel.

! snot of the very high, possible with the new rungs-appropriate tool Machining performance and the corresponding force of the chip is due to the backward sloping design of the Chip trailing edges largely rendered the erosion force of the chip harmless. Nevertheless, it can be recommended, according to another Feature of the innovation at least the area directly adjacent to the cutting steel dea? Chip runoff edge with armor to provide.

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In this way, the lathe operator has three cutting steels available on one tool sheet when using the tool according to the innovation »These three cutting steels can be used one after the other without having to set up the tool or workpiece again. The tool blade center point is then expediently designed as a pivot bearing, so that when the tool blade rotates from one operating position to the next operating position, the cutting steels because of their equal distances from the blade center point . · Always get to the same place. There they are held in place with additional detents.

These locks can be several equally spaced around. the Tool center point have attached holes for countersunk screws, in the operating position of each cutting tool at least two holes in the tool blade are aligned with two countersunk screw tapped holes in the holder and thus with two screws a lock can be brought about

An exemplary embodiment of the inflation is explained in more detail below j show it:

* ^J ■ "" - 1 the new tool in a plan view,

Fig. 2 the object after £ ig. 1 in elevation and] thirty _e an end view of the new tool. 3

The tool shown consists in principle of his work = zeugÜLatt 1, on which three cutting tools 2, 3 and 4 with the required Ire angles are provided. In addition, the tool consists of a holder 5 with a shaft 6. The blade 1 is mounted exchangeably on the holder in a manner to be explained in more detail.

The tool blade 1 carries the at a mutual distance from each other arranged cutting steels, which are arranged at equal radial distances from the center 7 of the blade. To everyone Sehneidstahlkante 2a, 3a, 4a is followed by a chip runoff edge 8, 9, lü. The chip runoff edges 8, 9, 10 close with the cutting steel edges 2 ^, 3a, 4a that belong to them are blunt Angle.

. The area of each chipboard immediately adjacent to the cutting steel ^ 'trailing edge 8, 9, 10 carries armor 8a, 9a and 10a in the illustrated embodiment.

Two counter bearings are used to store the sheet on the holder 5, one at 11 and another at 12 in Pig. 2 is shown _e S ¹ Ur each of these counter bearings 11 and 12, two blade edges are provided when one of the three cutting tools is in its operating position

The one in Pig. 2, the cutting tool 3 is in its operating position. The Andes Bearings 11 and 12 of the holder 5 are provided bearing surfaces, as can be seen from Pig "1 for the bearing surface 11a and from Pig. 2 through the dashed representation for the bearing surface 12a shows, for better centering of the tool blade, directed obliquely inwards, but otherwise run parallel to the sheet edges 8 and 10. These sheet edges have certain areas 8b, 10b, which cooperate with the plates lla, 12a.

In the manner of a prism, the feed forces which are applied in the holder 5 or in its shaft 6 are thereby eliminated The reaction forces resulting from the machining are split up and introduced into the storage areas.

The blade center 7 is designed as a pivot bearing, that is, it carries a bore 15 for a countersunk screw 16, which in

a threaded blind hole 17 in the head of the holder 5 can be screwed in. For every operating position of the tool mat a lock is also provided.

For locking are at radial distances from the center of the blade 7 three countersunk screw holes 19, 20 and 21 are provided. Two further threaded blind bores 22 and 23, respectively are arranged on the head of the holder that two of the holes 19-21 in the operating position of one of the Cutting tools 2, 3 or 4 are aligned so that the tool blade can be screwed to the holder with the help of three countersunk screws can.

With the tool described above and shown in detail in the figures, very narrow Very high machining speeds due to the small thickness of the tool blade and the small width of the cutting steels achieve »iDin spite of the high cutting performance occurs due to the beschrielmen storage of the tool blade on the tool holder no rattling, so that the associated disadvantages and difficulties are eliminated.

S chut ζ apply

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Claims (4)

S u t ty claims 1. Sum parting and grooving of workpieces on lathes Tool serving or benches, which consists of a tool blade with cutting steel and a holder on which the blade is exchangeably mounted, thereby g e - . indicates that the cutting steel has two \ J assigned sheet edges (8-10) at an angle to one another are, for the two blister bearings (11, 12) on the holder with bearing surfaces (lla, 12a) are provided. 2. Wexkzeiig naoh A * is claim 1, characterized by arranging three cutting tools on the Tool blade, which are arranged at equal radial distances from the center (7) of the blade and äsnsn respectively associated with the cutting steel edge (2a, 3a, 4a) enclosing an obtuse angle chip runoff edge (8-10) is, where at least! subregions (8b - 10b) of the two ζ ~ * \ Chip runoff edges of two adjacent cutting tools with the counter bearings on the holder interacting with the sheet edges, of the third cutting steel. 3 «tool according to claims 1 and 2, characterized in that at least the dem Cutting steel adjacent area of the chip flow edge a Armor (8a - 10a) wears. 4. Tool according to claims 1 to 3, characterized characterized in that the center of the leaf (7) is designed as a pivot bearing and additional Ar-re = sti · s * »■ tations (19-23) of the pivot bearing are provided. 5 »Tool according to claim. 1 and one or more of the following claims, characterized in that the locking several in the same Bores (19-21) for countersinking screws (22, 23) made at intervals around the tool center point (7) and ^ \ * two holes with two countersunk screw holes in the Cooperate holder (5).