DE1805771A1 - Cutting die for drop forging - Google Patents

Description

PATENT LAWYERS

dr.ing. H. NEGENDANK · dipl.-ing. H. HAUCK Dipl.-Phys. W. SCHMITZ

HAMBURG-MUNICH DELIVERY ADDRESS; HAMBURG 36 NEUERWALLd I

TKL. 3β 74 38 AND 36 4110

TELEGR. NBQEDAPATBNT HAMBURG

BORG-WARNER CORPORATION Munich ib ■ mozartstr. as

200 South Michigan Avenue ^tIL " ¹⁰ "

TELEGR. NBGEnAPATENT CHICKEN

Chicago, Illinois 60 604 / USA

Hamburg, October 28, 1968

Cutting die for closed-die forging

The invention relates to a cutting die which has a beveled on a workpiece part Cutting edge generated, with part of the workpiece brought into position on a cutting die that is an inclined workpiece support surface with a substantially parallel to the beveled Werkstüokteilkante has extending embossing edge, and with an upper die a similarly beveled and has a recessed work surface and is adapted to contact the workpiece part comes to bevel the edge of the workpiece along the cutting edge of the lower die. The movement of the The upper die takes place at an acute angle with respect to the workpiece support of the lower die, and the recess of the upper die has one or more beveled edges, causing the movement of the upper die against the workpiece resting on it

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Metal on the edge of the workpiece causes itself to be deformed at an acute angle in relation to it move on the upper die surface in two directions, as opposed to the 90 ° movement of the metal, which normally occurs in closed-die forging.

The operation of this new type of construction also enables a sharpening operation in the die, which in more can take place in one direction and yet requires less force on the upper die than is usually the case is required in normal forging operations in which the iron to be forged from the lower die moves substantially at a 90 ° angle with respect to the upper die.

Further advantages and novelty features of the invention will become apparent from the following detailed description in conjunction with the accompanying drawings. Show it:

Fig. 1 is a partial section along the plane through the center of symmetry of that disclosed herein Cutting die to show the upper die separated from the workpiece, FIG. 2 shows a partial section according to the plane through the Center of symmetry of that disclosed herein

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^ Tmm '' * & ■■

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Cutting die for the representation of the sharpening engagement on the workpiece located upper die,

3 shows a side view of the upper die looking from left to right in FIGS. 1 and 2 to show the chamfered-edged cavity for sensing and Inspection of the workpiece,

4 is a view of the upper die from below to illustrate the one provided with beveled edges Cavity for gripping and sharpening the workpiece, and

Fig. 5 is a plan view of the lower die and the workpiece locking components for illustration their relationship with each other.

A cutting die generally designated by the numeral 10 is used herein to explain and describe the Invention shown (Figs. 1 and 2). The cutting die 10 generally consists of a schabotte 11, a Sohneideuntergesenk 12, a workpiece holder 13, a Abutment component 14 for the upper die, a cutting upper die 15, a bear 16 and a stripper guide body 17. A workpiece 18 is shown along with the cutting die to illustrate the operation of the die to explain.

909826/0231 " ⁴ "

The scabbot 11 is a fixed body, in which the lower cutting die 12, the workpiece holder 13, the abutment component 14 and the stripping guide body 17 are mounted. More precisely, the lower cutting die 12 rests on a recess surface 20 in the scabbard 11 and is by a Bolt 21 held in this position »The lower cutting die 12 has a workpiece support surface 22 provided which are at an acute angle with respect to the movement of the shown by the arrows Cutting upper die 15 (Fig. 1 and 2) is formed.

The cutting lower die 12 is also provided with a recess 23 (Fig. 1, 2 and 5), the one Provides access to the top edge of workpiece 18 to automatically or manually insert the workpiece and remove. The wiper guide body 17 lies directly under the upper die 15 and is provided with concentric passages 27, 28 and 29. In the bushings 27, 28 and 29 is a stripping pin 30, the head 31 of which is on a shoulder 32 rests and the shaft 33 of which is held in a sliding manner in the bushing 28 through the bushing 27 extends and is screwed into an opening 34 of the workpiece holder 13 »

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A compression spring is located between the workpiece holder 13 and the surface 36 on the bottom of the bushing 27 35 provided to oppose the bolt and the associated workpiece holder upwards in the direction the upper die 15 and from the fish 37 of the wiper guide body 17 continue to press.

It should be noted that the workpiece holder 13 thereby pressed upwards with respect to the lower die 12 which is attached to the öchabotte 11 in order to strip the workpiece 18 from the lower die 12 and around workpiece holding surfaces 38 to be provided when the upper die is moved upwards (Pig. 1 and 5). It should also be noted that the workpiece holder 13 by its »/ chelating effect with the surfaces 39 of the lower die 12 and the surfaces 40 of the abutment component 14 opposite a lateral Movement with respect to the lower die 12 and the abutment component 14 is retained.

The cutting upper die 12 consists of two pieces 15a and 15b which are held together by bolts 45. The Obergeserik 15 has a general with the Numeral 50 designated cavity (Fig. 1-4), which has a V-shaped beveled edge part 51, which complements the pages 39 of the lower die 12. - 6 -

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The cavity 50 has a central part 52 which is designed to correspond to the surface of the workpiece 18 is. When operating the cutting die according to the invention, a workpiece 18 is placed on the workpiece support 22 of the lower die, the edges of which the surfaces 38 of the workpiece holder 13 touch these in addition.

It should be noted that a point 55 at the top corner edge of workpiece 18 (Fig. 1) abuts workpiece holder 13 while the remainder of workpiece 18 does not contact it to allow workpiece 18 to flow sideways during forging of its edge enable. The upper die 15 is then pressed down with its bottom surface coming into contact with the workpiece holder. Thereafter, causes a further downward movement in that the workpiece holder 13 is even moved together with the upper die 15 downwardly and eventually out of its the edge of the workpiece 18 adjacent position (FIG _o 2) "

During the downward movement of the upper die 15, the cavity of the upper die becomes over the workpiece 18 moves and the beveled surface

909826/0231

of the cavity engages in the upper eccentric edge of the workpiece 18, as shown at point 55, and the metal of workpiece 18 along the top corner edge is induced, mainly downwards and gradually right (Fig. 2) on the inclined surface 51 to flow to a beveled surface 56 on the workpiece and thereby to form a conical cutting edge on the workpiece.

It should be noted that surface 56 by forging the center of workpiece 18 more along a main path at an acute angle to the Path of the upper die is formed as along a path perpendicular to it in the usual way; in this case, a smaller upper die force is required to form a relatively large area 56 than it is usually necessary.

It should also be pointed out that the upper die 15 engages the "part holder" in such a way that the upper Surface of the Y / piece holder 13 at a small distance from the outer edge of the upper die in the vicinity of the cavity 50 remains free. This Clearance allows any material that may have melted from the workpiece to pass through the workpiece holder 18

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to flow and from the beveled. To be caught edge of the surface 51 of the upper die 15, when it comes into contact with the edge 39 of the lower die 12.

Of course, the invention is not limited to the particular ones shown and described Constructions and designs limited. It is clear to those skilled in the art that changes have been made without departing from the principles of the invention.

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Claims (4)

_ 9 patent claims 1. Cutting die for forming a beveled cutting edge on a workpiece, characterized by an upper die mounted on a predetermined path for forging movement (15), a lower cutting die (39) with a Workpiece support surface (22) and a pointed edge (39), which are in the path of movement of the upper die lies and is inclined at an acute angle towards it, the upper die being a sunk Has work surface (50) with a beveled edge (51) on the edge of the workpiece (18) resting on the support surface can forge a bevel, and wherein the upper die can move in the direction of the path to get into point engagement to come with the workpiece to form a beveled cutting edge on the workpiece. 2. Cutting die according to claim 1, characterized in that that a workpiece holder (13) in the path of movement of the Upper die (15) is provided, which is normally in the direction of the upper die in a position in the direction of the edge of the workpiece (18) - 10 - 909826/0231 is biased and moves with the upper die when it is grasped by this to itself to remove from a normal lateral position and the same when forging the male part to allow any excess metal to flow over the holder and off the beveled Upper die surface (51) and the lower die cutting edge (39) separated to form a cutting edge to become,, 3. Cutting die according to claim 1 or 2, characterized in that the inclined pointed edge (39) Is V-shaped and its apex is inclined away from the upper die (15). 4. Cutting die according to claim 2, characterized in that that the holder (13) is designed to be driven by the upper die (15) so that ■ the holder with the upper die (15) and the working surface (22) of the die by a fixed distance with respect to the upper die moved to the metal of the sharpened workpiece while moving of the holder together with the upper die to enable a flow over the holder C13). 909826/023 1 Blank page