DE2318626A1 - DEVICE FOR NOISE DAMPING OF WORK MACHINES - Google Patents

Description

Provision for noise suppression from working machines refers to a device for damping the tool or die impact von daschinen for non-magnetic cold or hot forming of metallic materials, whereby the @aschincnstande in @effektbereich the Umformwerkzcugc at least one, himself horizontally extending opening for feeding and discharging the material to be processed having.

The gross noise development in these machines results from the Impact between the tools or from the collision of tools and @ Erkstück. This leads to the oscillatory movements of the tools and those with them generally via form-locking coupled bears resp.

Ram, as well as the fixed or movable machine table, These swirling movements in turn generate airborne sound and also become at the same time via the guides between bars or ram on the stand of the press or the llammers transmitted, whereby an also outwardly directed airborne sound is produced.

In addition, there is another component of structure-borne noise that comes from the machine foundations and the ground is passed.

While the structure-borne noise that is conducted over the floor is of relative is of little importance and the portion resulting from the stator vibration is similar How insulation can be largely dismantled in aircraft construction is the major one Problems in mastering the tool or

Die sciilages through the stand openings in the tool area can freely enter auditoriums. Especially with so-called counter-blow hammers, where up to 20 strokes are often required to form a part, The last-mentioned noise component is particularly disruptive and harmful to health the end.

@ier now uses the present invention and suggests dampening the noise development resulting from the lowering impacts, elements for each Depending on the cycle, the stand openings are closed at the time of the meeting to arrange the tools with the material to be deformed.

I) he technical implementation can be made so that everyone A flap or the like is assigned to the stand opening, which starts with the working stroke reaches the closed position and rubs the tool space again on the ram return stroke.

To move the locking elements it can be provided that the flaps are mechanically coupled to the tool movement or that the closure elements and assigned a separate drive system or a separate locking mechanism is connected with the machine control system.

This own locking mechanism can be used as a cam disk drive, Air cylinder with toothed rack, fully hydraulic - or as an electrical control or Linear motor be designed, the controller being an electrical synchronous controller depending on the cycle of the tools.

Another feature of the invention is that the Closing elements consist entirely or partially of a sound-absorbing material and are guided in roll or slide guides in or on the machine frame.

For machines with more than two stand openings, it is also to close part of the openings with rigid insulating bodies.

After further, not shown in the drawing ttlerkmalen the In accordance with the invention, the flaps can be designed in one or more pieces and E.g. as two Iialbklappen move in opposite directions in the closed position. Are illegal the guides or contact points are of course designed so that no sound can penetrate to the outside through any joints.

In the case of machines with a safety guard, it is more than that It makes sense to design this as a soundproofing element.

An exemplary embodiment of the invention is shown schematically in the drawing shown.

1 shows a view of a closed-loop forging press, and FIG. 2 a plan view of FIG. 1.

The rivet joint press shown schematically consists of the Stand pillars 1 and the connecting top plate 2, as well as the bar 3, which is on the Belts 4 and the rollers 5 with the lower bear 6 is connected.

This press resp.

llalln; it is via the cylinder-piston unit 7, 8 and the control element 9 powered with pretensioned @ ice air and is with part of its height in the Ground 10 let in. The upper and lower dies are on the two bears 3 and 6 11, 12 attached, between which the material 13 to be deformed is placed.

ie for example for the material supply and removal serving stand openings 14, 15 are provided with guides 16 in which the clockwise opening and closing Flaps 17, 18 are mounted from sound-absorbing material. These flaps 17, 18 cover, as indicated by hatching in Fig. t, the Cesenkraum 19 at the moment of Deformation impact by, for example, a drive system (not shown) are displaceably guided in the weighting of the arrow 20.

The further openings 21 lying between the upright columns 1, 22 are closed with rigid insulating bodies 23, 24 in a sound-absorbing manner.

Claims (9)

Claims Device for damping the tool or die impact of blow molding machines for non-cutting cold or nib deformation of metallic materials, whereby the machine frame at least one in the area of action of the forming tools. horizontally extending opening to lead in and out of the material to be processed, g e k e n n n z e i c h n e t by elements 17, 18 for each cycle-dependent closing of the stand openings 14, 15 in or before the time at which tool 11, .12 and material 13 meet. 2. Apparatus according to claim 1, d a d u r c h g e k e n n z e i c h n e t that each of the stator openings 14, 15 is assigned a flap 14, 15 or the like which reaches the closed position at the beginning of the working stroke and -beiln the slide return stroke the tool space 19 releases again. 3. Device according to claims 1 and 2, d a d u r c iii g e k It is noted that the flaps 14, 15 or the like on the front and rear of the Processing machine 1, 2 arranged and in each case before the meeting of Tool 11, 12 and material 13 are closed. 4, device according to claims 1-3, d a d u r c h g e k c n n z c i c h n e t that the flaps 14, 15 mechanically with the ram or bar movement are coupled. 5, device according to one or more of the preceding claims, d d a d u r c ii g e k e n n n z e i c h n e t that the closure elements 14> 15 a separate drive system, dzw. assigned its own closing mechanism and is linked to the machine control by circuitry. 6. Device according to one or more of the preceding claims. d a d u r c h <> e e k e n n n n z e i c h n e t, as the closure elements 14, 15 consist entirely or partially of a sound-absorbing material and roll or sliding guides 16 are guided in or on the machine stand 1. 7. Device according to one or more of the preceding claims in the case of machines with more than two column openings, d u r c 10 g e k e n n z e i c h n e as part of the openings 21, 22 n; with immovable insulating bodies 23, 24 is closed. 8. Vorrichtunt, according to one or more of the preceding claims, d a d u r c h e k e n n n z e i c h n e t that the closure elements as one or Multi-piece plates are formed and one and or more directions in Get closed position. 9. Device according to one or more of the preceding claims, d a d u r c h e k e n n n z e i c h n e t, dal for machines with safety grille or the like the latter is also soundproofing.