DE6607719U - DEVICE FOR FORGING CRANKSHAFT - Google Patents

Description

Patent attorney

Karl A. Brose

1 / Po Munich-Pullacb, 14- "I * ez.

File number: C 12 97 ^ / Th (ne * je Hasse - old class

CSH-EEiAIBE LABOHAS0HIÜH OBHOBKI PMSTTClSEd, Poznan. Grobla

Poland

Torricbtrung zu forging of Κττ belwellen

The object of the innovation is a device for smithing

voss. Crankshafts by upsetting and bending at the same time

Pressing with two separate upper and lower tools, between those for bending by Eurbelhuben another w "erkaeugsatz" is arranged, the upper tools pivotable via articulated levers on a press ram arranged between See plate supported and the sub tools opposite the The press table is arranged to move transversely to the direction of the press ram stroke.

In a known forging press for crankshafts that, however not ait supported by articulated lever on press head Upper tools and also not movable on the base plate Lower tools is provided in which, rather, the pressing tools in a horizontal plane in the transverse direction be moved back and forth to the workpiece without doing a exerting compressive thrust on the workpiece in its longitudinal direction is necessary to shape the outer contours of the crank «Α Cheeks no swings that interact with the PreSwex tools

bake, but provided insert pieces that are pressed on by means of hydraulically operated clamping tools. These Inserts are used at the same time to compress the workpieces during the formation of crank strokes and then to hold them in place of the workpiece when the bending tool is withdrawn from the crank stroke formed. So this is one according to a different principle than the one according to the innovation Device working, complicated and expensive device.

The state of the art also includes forging presses for crankshafts that are equipped with swivel jaws, which be moved together with the bending tool and working under load, subject to heavy wear Press tools are. Due to their shape and arrangement, these swivel jaws can do that when the bending tool is released The workpiece cannot be held. In contrast, according to the firing, the swivel jaws are not primarily force-transmitting press tools, but among others in their closed position securely supported abutments for the crank webs to be formed and around holding members for the crankshaft while the bending tool is being withdrawn *,

For devices for pressing Eolz dowels or other thin rods made of other soft materials such as plastics, soft metals or the like, it is known that To shape the surface to form embossments with the help of a factory set, which consists of an upper punch and two pivoting jaws that were hinged to the press frame and held down. To create a time difference between the attack of the swivel jaws on the workpiece and the attack of the upper punch were here on k = iuerhaupt des Oberstempel EoIlen, which with

corresponding mating surfaces of the swivel jaws in the sense Control of the closing and opening of the swivel jaws cooperated. Although there is broad agreement, there is no reason to believe that details that are known on a tool for pressing small parts, were also close for tools for crank stroke pressing. The innovation is based on the fact that when forging crankshafts in practice there are difficulties in pulling them out of the bending tool from the compressed crank stroke of the Wave because it could not be held in its initial position. The innovation has the task posed to eliminate these difficulties and to create a forging press for the production of crankshafts, with wslcser the workpiece tools from the pressed crank stroke is held without expensive means and therefore when the bending work is withdrawn tool cannot be lifted and moved.

Keuerungsgemäß this is now achieved that at a Se rin 1 eoearegse the e ingang s g Gnann ran AE2 "t SS Aesh 4feite2N = tools * are hinged to both sides of the bending point, the shaping of the Äußenkonturen of the crank webs in a conventional manner influencing, down holding pivoting jaws which are provided with inclined and when lowering the upper tools with corresponding opposing surfaces of the same interacting guide surfaces and are supported in their closed position while holding the workpiece with their back surfaces on sliding surfaces of the upper tools until after the bending tool has been withdrawn.

In the drawing, the innovation is explained, for example, It shows:

a newly designed device in side view, the left half of which is an upper and a TTnterwerkseug shortly before closing and their right- [

half the closed position ] of the tools in front of the. Upsetting process J illustrates t;

the same device in side view, the left half of which is closed ^ sene position of the tools at the end of the upsetting process and their right Half illustrates the open position of the tool;

3 in the left half a cross section along the line JL-A and in the right half a cross section along the Li -—-; _Λ t> -ο Λχ

Fig. Α a horizontal section after the

Fig. 5 in the left half a transverse section after the line C-C and in the right half a cross-section after the line S-B of Figure 2;

Fig. 6 is a cross-section along the line E-S of Fig. 5;

the side view of a variant of the device of FIG. 1 in the position after the end of the puncture ganges5

Fig

. 7th

Fig. Δ the side view of a third

Embodiment of the device in one phase of the locking ring the pressing tools,

In the device shown in FIGS. 1 to 6, the upper press j ■ tools 3 by obliquely directed and beldendig on the j Pin 11 and 12 mounted articulated lever 2 with the head piece 1 j pivotally connected. The lower tools 4 · sit longitudinally * - j slidable on the base plate 5 · in your starting position and the tools touch before the upsetting process. 5 s 4- the at-: attached to the ends of the head piece 1 and the base plate 5 Stops 6 and?. With 8 is the workpiece to be formed designated. The upper tools 5 have projections 9 which, when the forging press is closed, are correspondingly shaped Recesses ΊΟ of the lower tools 4- engage. To the off— bending the crank stroke is used "from above onto the workpiece acting bending tool 15.

There are two swivel jaws 14. J ₂ It; Articulated spacing next to each other by means of pins 19. These swivel jaws form the lateral delimitation of the "Bl-ige" point and take part in the shaping of the outer contours of the Surbel cheeks during the upsetting and bending process. They are sloping on Ibxer s backside. FuTrrungs surfaces 15 provided, which merge into rear surfaces 18, which create their vertical counter surfaces 21 when lowering the Oberwerkseuge 5 sn. The inner surfaces 16 of the swivel jaws 14, which surround the piece 8, are curved outward; and determine the shape of the outer surfaces of the euro formed during upsetting and bending of the workpiece S

When lowering the upper tools 3 onto the lower tools 4 the inclined sliding surfaces 20 of the upper tools come into engagement with the inclined guides 15 of the swivel jaws 14 and pivot it inwards towards the workpiece 8. In this position, the swivel jaws 14 are with their back surface 18 supported on the mating surfaces 21 of the upper tools 3 lowered onto the lower tools 4. When upsetting and When the workpiece 8 is bent, the crank stroke 17 (FIG. 5) which forms this is supported on and in the swivel jaws 14, which so contribute to the shaping of the crank webs.

After this forging process, the upper tools 3 are lifted from the workpiece 8 and the lower tools 4, wherein the bending tool 13 is pulled out of the crank stroke 17 formed will. During this process, the workpiece 8 is held by the swivel jaws 14 in its position on the lower tools held. During the further upward movement of the upper tools 3, the swivel jaws 14 are released from them and automatically pivot back into their open position (see Fig. 5i right half). Then the workpiece can can be removed from the lower tools.

The device designed according to the innovation can also be equipped with several pairs of ochwenkbackenpaaren.

Fig. 7 shows another embodiment in the working position of the pressing and upsetting tools 3 ₅ 4 and the bending tool 15 "In this case, the axis of the lower pivot pin 1? the articulated lever 2 above the - lying on the workpiece - dividing plane of the tools 3, 4 or above the horizontal longitudinal center plane of the workpiece 8 used.

ΊΟ

r> onents for upsetting the workpiece are particularly favorable the partial suction level of the pressing tools has been relocated.

In the embodiment according to FIG. 8, which shows the device before the upsetting and bending process, the shell-like ends of the articulated levers 2 are supported on cylindrical sliding surfaces of stationary bearing bodies 11 and 12a. Here, the points of application P of the horizontal compression component are advantageously above the axis of the bearing body 7 attached to the upper tool 3 ^v d 12a and below the division level of the pressing tools.,

Claims (1)

SCEtJTZAIiSPHiJCH Torrichtung for forging crankshafts by simultaneous upsetting -.md bending presses on n it two separate upper and Uncerwerkzeugen, arranged between which the killing of a Xurbelhüben v / Eiterer tool set?; The upper tools are pivotably supported by articulated levers on an intermediate plate arranged on the press ram and the upper tools are movably arranged opposite the press table transversely to the alignment of the press ram stroke, characterized in that on the lower tools (4) on both sides of the bending point the iOnage— exercise The outer contours of the crank webs are articulated in a manner known per se, holding down swivel jaws (14-) which influence the flow and which are provided with inclined and lowering of the upper tools (3) with corresponding counter surfaces (20; Closed position while holding the workpiece (8) until, after the bending tool (15) has been withdrawn, its rear surfaces (18) are supported on sliding surfaces (21) of the upper tools (3).