DE2521624A1 - KNIFE HEAD FOR ROUGHING AND FINISHING SPIRAL AND HYPOID BEVEL WHEELS - Google Patents

Description

Cutter head for roughing and finishing spiral and

Hypoid bevel gears

The invention relates to a cutter head for roughing and finishing of spiral and hypoid bevel gears, with a variety of prismatic tool steels, which are inserted into steel grooves via clamping pieces and clamping screws are adjustable.

Cutter heads of the type mentioned are already for the processing of Oerlikon and Klingelnberg gears known.

With these cutter heads, prismatic tool steels were used with right-angled em cross-section is used on which the required contact, rake and clearance angles had to be ground. It was accordingly the effort required to grind the tool steels is relatively high.

There were cutter heads of the type mentioned for Gleason gears not yet. The ones commonly used here, by Gleason

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Seat of the company: Cologne · Register court Cologne, HRB 84 · Chairman of the supervisory board: Hans Schaberger Board of Directors · Robert A. Lutz, Chairman · Horst Bergemann · Franz J. Bohr · Waldemar Ebers · Charles W. Flynn · Withelm Inden · Alfred Langer Deputy: Paul A. Guckel ■ Hans-Joachim Lehmann ORIGINAL INSPECTED

The cutter heads developed have very complex tool knives that are relatively expensive to manufacture. Accordingly, they are Cost of replacing a diluted set of tool knives relatively high.

The object of the invention is therefore to create a cutter head of the type mentioned, which can be used in particular for Gleason gears and in which the tool costs incurred for a used knife set are significantly lower, up to 50%.

According to the invention, this object is achieved by a cutter head of type mentioned has the features indicated in the claims.

The cutter head according to the invention takes care of the inclined over angle wedges Arrangement of the prismatic, a rectangular cross-section having tool steels so that one side edge of the tool steels each lies exactly in the required pressure angle to the knife head axis and thus a separate grinding of the pressure angle can be omitted. To the Steel tools only have to be ground once to a relief angle the unimpaired cutting of the outer and inner knife enables. The rake angle can easily be at right angles be ground and re-sharpened to the side edge that encompasses the pressure angle. The clearance angle on the flank of the den Side edges that include the pressure angle are offset by parallel to the front (outer knife) and parallel to the rear (inner knife) to the radius of the cutter head, while the clearance angle is reached at the cutter tips can be achieved by inclining the vertical axis of the tool steels relative to the knife head axis against the cutting direction to the rear.

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The required exact alignment of the cutting edges of the tool steels is here according to the invention on setting masters for the external and Inner knife facilitated. In particular, the exact setting of the knife tip width is also possible via the setting master.

The invention is illustrated by means of one in the accompanying drawings Embodiment explained in more detail.

Fig. 1 shows a plan view of a cutter head according to the invention.

FIG. 2 shows a section along the line II-II in FIG. 1.

FIG. 3 shows a section along the line III-III in FIG. 1.

FIG. 4 shows a section along the line IV-IV in FIG. 1.

FIG. 5 shows a section along the line V-V in FIG. 1.

In the figures, a cutter head 1 is shown, which consists essentially of a Base body 2 and a retaining ring 3 consists.

The base body 2 is provided with a multiplicity of steel receiving grooves 4 and 5, respectively for outer and inner knives 6 and 7 respectively. The outside and inside knives 6 and 7 are in the steel receiving grooves 4 and 5 via exchangeable angle wedges 8 and 9 and corresponding clamping wedges 10 and 11 via the retaining ring 3 arranged clamping screws 12 with respect to the knife head axis 13 set inclined in such a way that the cutting edge 14 or 15 of an outer or Innenmeseers 6 or 7 forming side surface opposite the knife head axis 13 includes the desired pressure angle a or b.

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The steel receiving grooves 4 and 5 are opposite to a cutter head radius in the case of the outer knife 6 by a certain amount χ in the cutting direction 17 leading and in the case of the inner knife 7 by a certain amount y in the cutting direction 17 trailing parallel offset so that the Cutting edges 14 and 15 have sufficient clearance angles c and d.

The steel receiving grooves 4 and 5 are still opposite the knife head axis 13 inclined backwards in the cutting direction 17, so that the outer and inner knives are located at the knife tips 18 and 19, respectively, of the cutting edges 14 and 15, respectively or 7 result in sufficient clearance angles e or f.

The outer and inner knives 6 and 7 are here by one-sided, right-angled Grinding of the prismatic tool steels to the side surfaces until a required clearance angle g is reached or h produced.

The outer and inner knives 6 and 7 produced in this way are inserted into the steel grooves 4 and 5 and have to be adjusted with regard to the position of their cutting edges 14 and 15 to the cutter head radius R by means of dial gauges will.

The angle wedges 8 and 9 are provided with adjusting screws 22 for this purpose, By means of which they can be axially displaced to a small extent, as a result of which the radial position of the cutting edges 14 and 15 relative to the cutter head radius R. or the knife tips 18 or 19 can be precisely adjusted to the knife tip width M.

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For this purpose, the cutter head 1 is preferably provided with an em receptacle pin 23, the center of which is exactly on the required cutter head radius R lies. The receiving pin 23 serves to alternately receive a setting master 24 for the outer knife 6 and a setting master 25 for the Inner knife 7. The setting masters 24 and 25 here have a conical outer contour, the inclination of which corresponds exactly to the desired pressure angle a and b of the cutting edges 14 and 15 of the outer and inner knives 6 and 7, respectively. The upper diameter of both setting masters 24 and 25 corresponds here the required knife tip width M.

In Fig. 5 is the arrangement and structure of the aforementioned setting masters 24 and 25 shown. The position of an outer knife 6 with its cutting edge 14 is indicated here in dash-dot lines, while the position of a Inner knife 7 is indicated in dashed lines, the cutting edge 15 of which is congruent with the contour of the setting master 25 for the inner knife 7.

After all outer and inner knives 6 and 7 have been aligned according to their setting master 24 and 25, all outer and inner knives 6 and 7 must be ground on their knife face 26 and 27 to form a desired rake angle i or j. All outer and inner knives 6 and 7 must then with their knife tips 18 and 19 on the in Fig. 4 with O marked plane can be adjusted by means of a dial gauge.

The cutter head 1 is now for roughing and finishing of spiral and Use hypoid bevel gears.

If the cutting edges 14 or 15 of the outer or inner knife 6 or 7 are worn, then all the knives are reground on their knife face 26 and 27 in the manner indicated in FIG. 4 at 28 in dashed lines. After each regrinding, all of the knives with their knife tips 18 or 19 must be adjusted to the plane marked with O by means of dial gauges. D-168/21. April 1975 609848/0116 - ⁶ ~

To sharpen a set of knives of a knife head according to the invention, only one grinding process on the knife face of the tool steels and one part before going to the knife point plane is required. Due to the extremely simple shape of the tool steels in connection with the simple regrinding and adjustment process, the tool costs can be reduced significantly compared to the amounts previously required.

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Claims (3)

Claims (I. \ Cutter head for roughing and finishing of spiral and hypoid bevel gears, with a variety of prismatic tool steels, which in Steel grooves can be adjusted using clamping pieces and clamping screws are set, characterized in that the tool steels (6 or 7) have a right-angled cross-section in a manner known per se and be ground on one side at right angles to the side surfaces are, so that a relief angle (g or h) results and in their steel receiving grooves (4 or 5) via exchangeable angle wedges (8 or 9) relative to the cutter head axis (13) are set inclined so that the Side surfaces forming cutting edges (14 or 15) the desired pressure angle (a or b) for an outer or an inner knife (6 or 7) opposite the M ess he include head axis (13) and the steel receiving grooves (4 or 5) opposite a cutter head radius (16) in the case of a Outside knife (6) advancing by a certain amount (x) in cutting direction (17) and in the case of an inside knife (7) by a certain amount (y) are offset in the cutting direction (17) trailing parallel so that the Cutting edges (14 or 15) have sufficient clearance angles (c or d) and the steel grooves (4 or 5) opposite the cutter head axis (13) are inclined backwards in the cutting direction (17) so that sufficient clearance angles (e or f) are given at the knife tips (18 or 19) and the Tool steels (6 or 7) one on their knife face (26 or 27) are ground to form the desired rake angle (i or j). 2. cutter head according to claim 1, characterized in that the Angle wedges (8 or 9) via adjusting screws (22) for setting the exact radial position of the cutting edges (14 or 15) in relation to the cutter head radius (R) are axially displaceable to a small extent. D-168/21. April 1975 609848/0116 ■ '■ t 3. Cutter head according to claims 1 and 2, characterized in that that the base body (2) is provided with a receiving pin (23) lying exactly on the cutter head radius (R), on the adjusting master (24 or 25), which alternately has a conical contour, for alignment the radial position of the cutting edges (14 or 15) of the inner and outer knives (6 or 7) can be attached. D-168 / April 21, 1975 609848/0116 Blank page