DE1926262C - Drive for a press ram - Google Patents

Description

3 . m des

movement curves associated with conventional tappet tappets 20. The other arm J-s

Drive devices with link or crank, angle or fork lever 17 carries scnwra

drive can be achieved, and the end of a connecting link 11, aes * » ₁₂

Fig. 6 is a diagram comparing with the end also pivotable by means of a ^^^

The ram drive device according to the invention is connected to a support part 13, uc

Targetable ram movement speeds with which is attached in the frame 1. _ex _

Ram movement speeds, which with her- Since the ram antnebszwisci.envvene j, _en 6,

Conventional Stöudantriebsvorrichtungen with Kulis- centric pin 4, the rocker 3, u r

sen- or crank drive are achievable. the crank 7 and the ram actuator.gungswclle »^^

The press according to FIG. 1, in which the slide drive device according to the invention in the ^we J: _{oil crank} i_

proper drive is built in, first shows the work that it is a so-called i ^ j _triebs _

usual embodiment and consists in the we- mechanism form, if ^de "Ji £ ^u · _Drch .

lateral from a frame 1, in which an in transfer shaft 3 through the gear. «'^

Certainly a movement that can be moved vertically up and down with a constant angular velocity u y _

Plunger 20 is arranged, which is divided on its underside 15, the ram actuation "J;" ^ _{h indig} .

a (not shown) die carries, and from a movement with a non-constant _gift i-

Table top 21 on which a corresponding (not granted. Since one arm of the ^angle ".""" _F

shown) die is fastened. The plunger 20 hebeis 17, which is on the eccentric ^ ¹ T _jsl

is rotatably supported by the driving apparatus of the Erfui- the StößelbelätigungswelleS ^'11 V j

^{application which, with reference to FIGS} . 2, 3 and 4 in 20 by the pin 10, the Vcibl; ^ulull ^ '^ _{t / tei} , ₁₃

The following is described in detail, about a pin 12 nut the leststeliciiücii. _{dje Vc} , ._

Pair side by side at a distance from each other and the other arm by uen Zap.en, ^^

arranged plunger 22, 22 vertically up and down, connecting rod 15 and the pin 1 »

bar. Since the actuation means is connected to drive the at plunger 20, for. ^lJlULr J "'g

the construction and operation of the plunger 22, 22 is the same as that of the conventional arrangement, be 1 ^uu ■, · _kk

are like, are terscheibc9 with constant Winkelge se h vvinuife for the purpose of clear presentation

before actuating means rotates only a plunger in Fig. 2, wherein erlindungsgemaßen Anor ^u "t>'_

to 4 shown. Furthermore, the press has an on which the eccentric disc 9 mil is not cons. ηUr w

electric motor 23 attached to its frame 1, kelgeschwindigkeil revolves, the plunger, on ul

the flywheel 25 is attached to 30 die via a drive belt 24, quickly aiii to berernew

drives that at one end of the press drive workpiece hinbewl (Abwartshub) and η · κ.Ιι ν

shaft 27 is attached, which in the frame 1 attachment of the desired machining a cn ^

th bearings 33 is rotatably mounted. The drive belt moved away from the workpiece (Aufwartsh b), so üa.

The Bcwegungsk r, A h / w shown in FIG. 5 runs over the output shaft of the electric motor 23.

and the flywheel 25, which in turn has the Hubgesdiwmd.fekuts shown in Fig. 6 via a 35

Usual coupling 26 the press drive shaft 27 curve «is achieved. ι, Γ, η, Ιηη .. the

_ranks As a result of the fact that after eier Lilmduii}, eic

At one end of a slide drive / .wischeii- Ezcnlerscheibe9, the before rotary movement e

shaft3, which in bearings 34 fixed in the frame 1 ram drive betweenwe Ie 3 through the uej |

is rotatably mounted, a gear 29 is attached, which transmits 40 crank drive to the plunger, unites

° _ ^b . . . ". ".. ·! _ ..: <.,; .. i, i L-.ititiütiiiμ- VVinkehiese

is rotatably mounted, a gear 29 is attached, which transmits 40 crank drive to the ram, en κν in Lingruf sfeht with an aui of the press drive with a non-constant W.nkclgLSLhu indict shaft 27 with a distance inward from the momentum is given, can before Leerze.t wah.cie e wheel 25 belesterten gear 28. This causes the backlash of the press vcrk.im wcuL and cIl Stöüelantriehs / wischwelle 3 of egg driven rams with high speed and gkut ai Ud press drive shaft 27 over the gears 28 and 29 45 workpiece / u and away from it bexvegj. .n, * mi rc a rotary movement with a constant angular velocity the stroke frequency of the ram per Mu U Nve U ^ ■ eligkeit granted. On the other end of the tappet is increased so far. You can also c ha c. cu anlnebs / wischenwdlc3 a gearwheel30 is attached, like Stöüelantnebsvon. graze. Vrn-Irichs

attached support parts 31 and 3Γ rotatably mounted Fig. 5 is a diagram 1.1 the m \ rü Ut hs

is. The main gear 2 serves as a first crank for the purpose of the movement curve before de. Stu; ^ ™ Doppelkurbelliicbs and has an eccentric net when it is pegejwnen A.lu. ss u pin 4, at one end a. Swing 5 an- time through the new type of ^ «'« ^ «"»" t-bsv. fens 6 is articulated to the second crank 7, which draws on the same slide when it is attached to one end of a push-pull actuator during the operation .,: m ^ tnel u ν bar and are shown inside the 1 laupt / gear 2. Thereby you are from eiern sto cm _rdch , ^b 60 der Slöl.ldantriel) svorri'-I, iu! U · nach eier hilinduni

Between its two ends, the IWwcj-um ^ -. Λ- πιμ Λ -ind the by Jon belatiguntiswelleS a · Ex / enterscheibe 9 is attached on the plunger, plunger with convenhc'u u_ Kt: .- svii- otU- i courage ei on el, ·, rotatable an ant.iebsvonu serving as a connecting rod: Mimgen ge / e.ch.uion HcwcguULSKui angle or fork lever 17, one of which is mounted with u hzw. α be / eich.l · ·· ..

Ann rotatably by means of a pin 14 an Enek · a 65 Fi, (, is a diagram, m that to ^ ugkiUis Connection length 15 Lagt, the other end of which / awaken the Geschwnul.gke.lsku.ve die del MoLi by means of a pin 16 on the plunger22, if it, for a given all Laikl is in turn in a way with the game / eil through, Ik: StoBelantnebsvon.chtung nut

of the invention is driven, and the speed curves which the same slide draws when it is driven by conventional crank drive devices during the same working time are shown. The speed curves drawn by the ram with the ram drive device according to the invention are denoted by B and the speed curves drawn by the ram with conventional link or crank mechanisms are denoted by h and b ' . It can be seen from the diagrams that according to the invention the length of the idle time in one working cycle is shorter than the lengths of the idle times in the same working cycle of the same ram when this is driven by conventional ram drive devices. In the construction of presses or press lines, in which successive machining steps are to be carried out on a workpiece and in which the ram in each press moves with its stroke movement with a drawing of a cosine curve, a very substantial difficulty lies in the fact that the press or presses Machining frequency at the drawing step is limited to a value that is smaller than that for which the presses have been designed. According to the invention, however, this problem is effectively eliminated.

Reference is again made to FIGS. 5 and 6 and it is assumed that the arbcilsspiclzeil is the same in all cases, and that in each case the pulling speed is measured with the starting point of the pulling process set at D. Then the drawing speed ratio for B: h: b ' is 1: 1.95: 3.26. If, therefore, the drawing speed is the same for all cases and is set, for example, at a maximum of 23 m / min, then the pushing clamp device according to the invention can offer a drawing speed which is 1 / 3.26 of that

gene of the conventional crank tappet drive device is. This slow pull is also advantageous in terms of the life of the press in a press Formentcile to be used. When the conventional crank ram drive device is the press ram enables the execution of 20 strokes per minute for the machining process the new type of slide mechanism to the press ram the execution of no less than about 65 strokes per minute for the Bcarbeiüings process during the same time.

For this purpose 2 sheets of drawings

Claims (2)

1 2 patent claims must be adhered to, with such a double crank drive the performance of mechanical 1. Drive for a press ram, which can only be increased within certain limits over presses, a connecting rod can be articulated with a one, while efforts are made to increase the performance of such presses around the working eccentric disc.
is bound, on which a connecting link is furthermore articulated from LJSA.-Patent 2 781015, which at its other end a gear for driving a press ram beam press frame is pivotably attached, in which one with a uniform angle is characterized in that for Speed-driven eccentric disk forward drive of the eccentric disk (9) is seen with an unequal rotational speed, which is encompassed by a connecting rod, for a double tappet known per se via a connecting rod which drives the press-press ram drive and which through a Connecting crank mechanism (2,4,5,6,7,8) is provided. member is secured against rotation, the once on 2. Drive according to claim 1, characterized by connecting rod and on the other hand marked on the press frame, that the first crank of the double 15 is steering. - Like the crank drive attached to this patent specification than with a uniform angle, it can also be shown with this speed drivable main gear (2) known construction only a certain deviation is, which is an eccentric tapping of the cosine form mentioned at the beginning of the fen (4) which can reach Hubbewegu; ig via a rocker arm (5), and this deviation; with the second bucket (7) is connected, which 20 meets today's requirements for the latter not about one inside the main tooth speed. wheel (2) reaching shaft (8) with the eccentric It is therefore the object of the invention to disk (9) is in drive connection. known to deviate from the sinusoidal shape Ram speed for the same purpose in still 25 to a greater extent than before. According to the invention, this is done at the beginning The invention relates to a drive for a said drive achieved in that for the pressing ram, the eccentric disc with a non-uniform joint is driven via a connecting rod with a rotary speed encompassing an eccentric disk for a press connecting rod is connected, on which also a double crank drive known per se Link is hinged, which is provided with his ". You can achieve so with simple Milanderen find a significant improvement in the number of strokes per press is consolidated. Minute. The press drive can certainly do this When a press ram of a mechanical type is compact and space-saving, ins-press in a conventional manner by means of an eccentric 35 special, if according to an advantageous further is driven, the movement and formation of the invention of the drive are so designed speed curves of the plunger at its Bevve- is that the first crank of the double crank drive as movement in the direction of the workpiece and drive path from it at a uniform angular velocity similar to a cosine curve. The gear has a main gear that has an exschpeed of the plunger in the Abwürtshub has its 40 central pin, which has a Maximum value at a point near the center of the swing arm is connected to the second crank, of the stroke. which the latter has an inside of the main tooth In a drawing press, if the drawing gear exceeds the shaft with the eccentric disk in speed a certain value, the drive connection is established. Such an arrangement Workpiece, e.g. B. by draw marks, disadvantageous bcein- 45 the elements of the double crank drive is extra- Must and may even become a committee. You can neatly save space, which looks particularly good therefore the pulling speed has a certain maximum - a comparison with the construction according to the werle not exceeded, and these limit the aforementioned German patent 615 611 in turn, the number of strokes that the press produces. can run in the minute. 50 In the drawing is an exemplary embodiment of the In order to avoid this disadvantage, the invention was presented, based on which the principle strives to get away from the cosine curve mentioned and the operation of the ram drive device men and a curve shape of the lifting speed direction according to the invention are explained. I ⁷ p to achieve, which shows up during the pulling process the slide moves relatively slowly and uniformly, 55 FIG. 1 is a front view of a press which has a before and after the drawing process, on the other hand, the preferred embodiment of the ram drive fast. direction according to the invention, From Hütte, Des Ingenieurs Taschenbuch, Ma- Γ i g. 2 is a vertical partial section showing the sdiinenbau, Te = I I'Λ, 2H. Edition, p. 2 ') 5 and 2%, main parts of the slide drive device of FIG. 1 it is known by means of a double crank drive 60 shows on a larger scale, I- ^: '\ g. 3 is a partial view along the line III-III of FIG approximately uniform forwards flow at a strongly to give an accelerated return. Figure 4 is a partial view, partly in section, according to FIG In the same way it is from the German patent line IV-IV of FIG. 2, in the direction of the arrows font 615 611 known, seen a double crank drive 65, to be used to drive a press ram. EZs F i g. 5 is a diagram comparing with FIG it has been shown, however, that due to the plunger drive device according to the invention structural restrictions that are necessary in a press with the ram movement curve with the ram