US1581632A - Hot-nut press - Google Patents

Description

April 2o 192s. 14,581,632

A A. DE FRlES HOT NUT PRESS Filed June 6, 1924 n l u n Patented Apr. 20, 1926.

ALFRED DE FRIES, OF CASSEL, GERMANY.

l 1,581,632 PATENT OFFICE.

HOT-NUT PRESS.

Application filed .Tune 6, 1924. Serial No. 718,350.l

To all whom 15m-ay conce-rn:

Be it known that I, ALFRED DE Finns, a citizen of the German Republic, residing at Cassel, Germany, have invented certain new and useful Improvements `in Hot-Nut Presses, of which the following is a speciication.

In hot nut presses, the tool slides of which have anirregular forward and backward stroke, the movement of the slides cannot be controlled by a simple crank drive and a cam drive has to be used. In `pre-:ses the slide of which has to be rapidly advanced from the position of rest the cam strikes strongly on the rear part of the slides. This blow-like pressure of the cam` does however not act in the-direction of the horizontal axis of the slide but at an angleto this axis from above. This shock is transferred bythe slide tothe lower surface of the rear part of the slide and on the guides wherefrom results a comparatively strong I wearing of these parts after a short time of service of the press. As the front part of this slide is not exposed to thisv rapid wear the slide and its tool will evidently adopt. after a comparatively short time, an oblique position with regard to the corresponding counter-tool arranged opposite so that an accurate engagement of these tools and consequently a uniform working is no longer possible. The parts submitted to wear must therefore be frequently repaired. This wear is especially -perceptible when two slides are arranged the onel in the other as is the case for all nut presses provided with stock-saving' devices.

The inconvenience of the rapid wear of the slides and of the guides for the saine is avoided according` to the invention by the insertion, between 'the pressure cam and the slide,`of a mechanism which transforms the cam pressure action on the slides inv an inclined direction from above linto a pressure which acts in a line substantially parallel to the slide.

An embodiment of the invention in its application to a hot nutv press is shown by way of example on the accompanying drawin in which z- `ig.` 1 shows in longitudinal section the punch slide and the hole punch slide.

Fig. 2 is a plan view of Fig. 1.

Fig. 3 isa section on line A--B of Fig. 1.

Figfl is a section on line C-D of Fig. 1.

On the main slide l containing the die plate2 and the die 3 two slides are arranged viztherpunch slide 4 containing the punch 5 iandjrthe slide 6 containing the piercing element 7. The main slide 1 glides on the guiding plate 8 and the slides 4 and 6 on the guiding plate 9 this latter being embodiedv in the main slide.

The machine or the slide is driven from pulley 10 by the pressure cams 12, 13, 14, keyed on shaft 11 journaled in the frame in line with the slides, the two cams 12, 14 serving to operatethe main slide and the cam 13 serving to operate the piercing element slide. On the shaft 16 arranged in the machine frame 15 above the rear ends of the slides three levers 17, 18, 19 are suspended. The heads of the levers stand between the slides and the pressure cams and the hitter are ,provided on the surface turned towards the slides with hardened pressing pieces 20, rollers 21 being arranged on the opposite side facing the pressure in contact with the rollers 21 of the levers- 17, 18, 19, and thereby cause the rollers and also the slides to advance, Through their shaft 1G, the levers 17, 18, 19 completely intercept the pressure of the cams acting in downwardly inclined direction so that mere- 1y the pressure of the lever heads acting in substantially axial direction is transferred to the slides. In other words' each element mounted on the hearing 16 has a portion extending between the slides and said cams and is operable under the inuenee of the cams so as to obtain a direct action from the cams through the interposed or intermediate members or elements to the slides in a line substantially parallel to the slides. "The result is that these elements 17, 18 and 19 being arranged between the cams and the rear ends of the tool slide eliminate all lateral friction otherwise caused by the downwardly inclined pressure of the cams with regard to the slides. The elimination sov of lateral friction and consequently of side wear on the slides is of special importance in nut presses on account of the piercer carrying slide being located in the punch carrying slide. An wear on either of these slides will affect t e position of the tools carried by the slides and throw them out of center, and as the wear on slides in vnut presses,

due to scale and water is well known, this elimination of Vfriction results in a very important improvement in the quality of the product.

lhe return of the slides is operated by means of the double-armed lever 22 in such a manner that the cam 13, after havingadf/vanced the lever 18 and thereby the slide "6, presses upon one arm of the lever 22 and pushes it downward, whereby the other arm of this lever, which acts on the slides, pulls the slides 1, 6 back. The punch slide is carried backward by slide 1 until the former hits against the stop 23, the punch slide beling thereby brought into the proper working osition with regard to the other slides. e rollers 21 shown in the drawin'nfs and described' above might be omitted although they ensuref an especially smooth working of the press.

It would further be possible to provide the mechanism described only for one ofthe `two slides for ensuring the same against on said frame, intermediate-elements `mov-- ably mounted on said bearing, each having a portion extending between the slides and' said cams and-operable under influence of the cams to obtain a direct action from the cams through the intermediate elements to the slides in a line substantially parallel to the slides.

In testimony whereof I aix my signature.

ALFRED 15E FRIES.

Images