WO2017137330A1

WO2017137330A1 - Working-space cover with separate chip removal

Info

Publication number: WO2017137330A1
Application number: PCT/EP2017/052451
Authority: WO
Inventors: Simon Schneider
Original assignee: Gebr. Heller Maschinenfabrik Gmbh
Priority date: 2016-02-08
Filing date: 2017-02-03
Publication date: 2017-08-17
Also published as: DE102016102153B3

Abstract

With the working-space cover (17) according to the invention, it is possible to achieve greater working and adjusting speeds for machine parts, such as, in particular, moving slides or the like, the driving and guiding device of which is separated from a working space by the working-space cover (17). Should fluids or particles get through the lamellar shielding (20), they are discharged in a controlled manner by way of the separately provided chip channel (30) or (33'). In particular, chips which get behind the lamellar shielding and are conveyed to the fixed end of the stroke of the working-space cover (17) by the back-and-forth movement of said lamellar shielding are received by a capturing space (38) and discharged. The formation of chip build-up outside the working space (12) and the impairment of the functionality of the machine tool (10) are effectively avoided.

Description

Working area cover with separate chip removal

The invention relates to a work space cover for a machine tool, in particular a machine tool for machining workpieces.

Workspace covers of the type mentioned serve to delineate the working space of a machine tool against inner spaces of the same, in which there are guides, drives, measuring equipment and the like.

For this purpose, for example, from DE 10 2011 052 406 AI a lamellae known to which a zigzag folded bellows and a lamellar arrangement belong. The bellows serves as a plate carrier and is movably guided along a direction of movement. Depending on the bellows position and movement, the slats are pushed together into a package or pulled apart from a flat lamellar armor. The lamellae overlap each other and keep chips originating from the workpiece processing away from the bellows.

[0004] It turns out that the lamellar armor has a good shielding effect. Nevertheless, it can not be ruled out that materials can escape from the working space behind the lamellar armor and thus to the lamella carrier. Such substances or objects can cause damage. In particular, they can accumulate in disk pockets, which are provided at the stationary end of the laminated armor for receiving the disk pack.

It is an object of the invention to remedy this situation.

According to the invention, the plate carrier is associated with a chip channel for the removal of shives behind the lamellae. This shavings channel extends along the to Example horizontal or vertical direction of movement of the plate carrier. If chips arrive behind the lamellar shell during the work of the machine tool, these chips can be removed via the chip channel. This allows operation of the machine tool with reduced respect for the lamellae. This consists of mutually partially overlapping lamellae, which can be pushed together to form a disk set or pulled out to a flat tank. Especially when pushing together it can happen with high dynamics that chips, abrasion, coolants or other substances behind the slats and thus reach the slats ^¬ carrier. If such substances are safely removed, it is possible to work with high dynamics, in particular high or increased accelerations, by carriages or other moving parts of the machine tool whose guides and / or drives are separated from the working space by the working space cover.

The chip channel preferably has two extending in the direction of movement of the disk carrier walls, between which the disk carrier is movably held or guided. To guide the disk carrier separate means such as guide rails or the like may be present. Alternatively, the leadership of the disk carrier can also be taken over by the two walls. What is essential is a sufficient free space in the chip channel for receiving fluids and objects that have come from the working space of the machine tool to the plate carrier.

The plate carrier may be formed by an uninterrupted trained (closed) folded sheet or by a structure having a plurality of openings. However, the closed mold better prevents further carryover of fluids or objects from the working space into the area behind the plate carrier. One of the walls of the chip channel preferably extends into a gap which is formed between the lamellae and the plate carrier. Verso adhering to the strip cladding fluids or particles can freely drop from ^¬. Front-adhered particles or fluids can do likewise. The material dripping from the lamellar tank falls into a chip discharge duct which extends below the working space of the machine tool. However, the material (particles and fluids) that has reached the plate carrier is transferred into the chip channel.

The chip channel is preferably open on the bottom side. This is especially true for work space covers with horizontal direction of movement. When working space covers with vertical direction of movement of the chip channel may also have a closed bottom and be frontally open. The contaminants (particles and fluids) then flow vertically, i. in the direction of movement. In the case of a horizontal direction of movement, on the other hand, they also flow vertically, but thereby transversely to the direction of movement.

At the machine frame side end of the laminated armor, a receiving pocket can be provided for this. Preferably, the receiving pocket of the laminated armor is connected to the chip channel. Thus, accumulation of chips at the ends of the path of travel within the receiving pockets can be avoided.

The removal of chips, fluids or other particles can be promoted by a purging device. Such a can, for example rinse fluid (gas, air, liquid, eg clean coolant lubricant) between the lamellar shell and the plate guide, that this space is cleaned. It is alternatively or additionally also possible, which at the (relative to the direction of movement) stationary end of the laminated armor arranged pockets for the disk packs with a To provide flushing device. Each above Spüleinrich ^¬ processing can permanently or temporarily, for example, be periodically or le ^¬ diglich required, active.

The plate carrier has a machine frame side end and a carriage-side end. The machine frame side end is stationary in the direction of movement (stationary) while the carriage-side end is movable together with the carriage. The working area cover according to the invention it ^¬ enables high carriage speeds and accelerations carriage without regard to the direction of movement, that is, whether it is directed against or in overlapping direction of the slats of the slatted armor.

The chip channel preferably leads into the central chip removal duct of the machine, which extends below the working space of the same. This guarantees easy and effective chip removal.

Details of advantageous embodiments of the invention are the subject of the drawing, the description or claims. Show it:

Figure 1 shows a machine tool with inventive working space cover, in a schematic diagram of principle.

Figure 2 shows the working space cover of the machine tool of Figure 1, in a schematic front view.

FIG. 3 shows the working space cover, schematized in partial sectional view.

Figure 4, the working space cover, in a schematic Schnittteilsteilung.

Figure 5 is a fragmentary perspective detail view of the work space cover of Figure 2, taken along the section line A.

FIG. 6 shows a detail of the working space cover according to FIG. 2, cut along the section line B. FIG.

FIG. 7 shows a further detail of the working space cover according to FIG. 2, cut along the section line C. FIG. 8 is a perspective view of the section of Figure 7 and

Figure 9 shows a detail of the working space cover of Figure 2, cut, along the section line E.

In Figure 1, a schematic illustration of a machine tool 10 is given, which has a demarcated by an enclosure 11 working space 12. The machine tool 10 includes a machine frame 13 on which a workpiece carrier 14 is preferably movable, i. for example, is displaceably mounted in a horizontal direction Z. In addition, the workpiece carrier 14 may carry a turntable 15 and / or other means for workpiece positioning.

Below the workpiece carrier 14, a chip removal channel 16 is arranged, which extends at least to a region below a working space cover 17, which delimits the working space 12 in a selected direction, for example, in particular in the Z direction. In the working space 12 projects (at least) a work spindle 18 which is to be connected to a tool for machining the workpiece. The work spindle 18 is movable in at least one direction transverse to the Z direction, i. For example, in the X direction and in the Y direction, also it is driven in rotation.

The work spindle 18 is supported by a carriage 19 which is mounted on two machine not further illustrated guides in the X direction and in the Y direction movable on the machine frame 13 and defined by position-controlled actuators movable. The mechanical components serving for this purpose lie in an interior of the machine tool 10 separated from the working space 12 by the working space cover 17.

The workspace cover 17 comprises in the present embodiment, two partial covers 17a, 17b for the movement in the X direction and in the Y direction. Figure 2 illustrates the covers 17a and 17b again in front view and in a different position of the carriage 19th

FIGS. 3 and 4 serve to illustrate the basic structure of a working space cover, using the example of workroom cover 17a. As can be seen, this has a laminated armor 20, which consists of individual strip-like plates 21, 22, 23, 24 of rigid material, such as sheet metal, in particular sheet steel. The individual slats are each connected along a long edge 25 to a slat carrier 26 located behind the slatted shell 20 as viewed from the working space 12. This is shown in FIG. 3 using the lamination 21 as an example. The other slats 22 to 24 are also connected to the plate carrier 26.

The free from the edge 25 free edge 27 rests on the adjacent blade 22 and under resilient bias to this. If the lamellar armor 20 is pushed together or pulled apart, the edge 27 slides on the surface of the lamella 22. The same applies to the remaining free edges of the remaining lamellae and their respective adjacent lamella.

The plate carrier 26 may be constructed in one or more parts. For example, it comprises a zigzag folded sheet 28, which is made of, for example, a plastic composite material, impregnated or rubberized fabric or the like. It is designed as a flat bellows. From the adjoining the slats 21 to 24 points of the sheet 28, intermediate walls 29, 30 may be provided, etc., which run on a in Figure 3 only dash-dotted lines indicated guide means 31 such as a rail 31 (Figure 4) slidably.

Figure 4 illustrates the working space cover 17a again in cross section, taken along the dot-dash line IV-IV in Figure 3.

The lower edge region 32 of the disk carrier 26 protrudes into a chip channel 33, which is formed between two preferably flat and parallel to each other oriented walls 34, 35. The chip channel is better understood from the figures 5 and 6. Figure 5 gives the view of the Rear side of the work space cover 17 free, for better illustration, the rear boundary of the chip removal channel has been omitted in the form of the wall 34. This wall 34 may be formed by a separate sheet or by a surface of the machine frame. As can be seen, the chip channel 33 is free below the plate carrier 26, wherein it tapers in a funnel shape toward a lower end which, as can be seen in FIG. 1, opens into the chip removal channel 16.

The lamellae 20 may be associated with a receiving pocket 36, in which the lamellae 20 is inserted when it is pushed together. This receiving pocket 36 can be separated from the working space by a wall 37, wherein this wall 37 and thus the underlying pocket, as shown in FIG. 1, can also be located outside the working space 12.

Below this receiving pocket 36, an opening into the chips channel 33 trap space 38 may be formed, which serves to receive fluids and particles that drip off or fall off of the collapsed disk set of the laminated armor 20. The capture space 38 preferably has a sloped bottom 39 for directing drained material into the chip channel. Reference is also made to Figure 8, which illustrates in particular the transition from the trap area 38 to the chip channel 33.

To improve the chip removal can be provided to flush the chip channel and / or the catching space 38 with a suitable gaseous or liquid fluid such as compressed air, cooling lubricant or the like. Shavings can be guided to the swarf removal channel 16 via corresponding inclined chip guide plates. One or more purging devices may be provided, which are the rear side of the lamella shell 20 facing the lamella carrier 26 and / or the front side of the lamellar carrier facing the lamellar armor 20 26 at least at one point with a gaseous or liquid fluid rinse. Thus the formation of Spänean ^¬ collections of the slatted armor 20, the plate carrier can be 26 o of avoided in the receiving pockets 36th

The inventive arrangement of at least one end 32 of a disk carrier 26 in a chip channel 33 is shown in FIG 9 also for the vertically movable working space cover 17b. There, the wall 34 located behind the plate carrier 26 and the wall 35 projecting between the plate 20 and the plate carrier or projecting therebetween are connected to each other by a continuous bottom 40. Of the

Chips channel 33 runs parallel to this base 33 and thus parallel to the direction of movement of the working space cover 17b. This chip channel 33 ^x opens into the previously described chip channel 33 and serves as this for the removal of fluids, dusts and other particles that may have passed behind the lamellae. Again, a rinsing device may be provided to promote chip removal.

The workspace cover 17 so far described works as follows:

In operation are located in the working space 12 of the machine tool 10 of Figure 1, a workpiece and at least one held by the work spindle 18 and rotationally driven tool. During machining, this is brought into engagement with the workpiece so that material is removed and chips are formed. These are ejected from the workpiece together with any used cooling lubricant and ultimately end up in the chip removal channel 16. A portion of the cooling lubricant and / or the particles removed from the workpiece, in particular shavings or fragments thereof, reach the lamellar shell 20, from which they largely fall or fall Drain. Occasionally, the carriage 19 can make fast driving movements, in particular to drive the work spindle between the tool change position and working position back and forth or to convict them in different working positions. These movements should be completed as quickly as possible in order to minimize the time required to machine the workpiece. Under certain circumstances, the acceleration of the carriage 19 or its speed may become so high that the edge 27 (FIG. 3) lifts off from the outer surface of the lamella 22 for a short time and in places or as a whole. The same can be done by the corresponding edges of other slats. As a result, chips and dusts as well as, if present, cooling lubricant can possibly reach the intermediate space between the plate carrier 26 and the lamellar shell 20. Such solid or liquid particles will now not collect at the lower end of the disk carrier 26, but transferred from there into the chip channel 33. The particles and fluids collecting in the chip channel 33 then enter the chip removal channel 16, where typically an active clearing means, such as a chip removal belt or the like, is active.

With the working space cover 17 according to the invention higher working and Verstellgeschwindigkeiten of machine parts, in particular moving carriages and the like, can be achieved, the drive and guide device is separated by the working space cover 17 of a working space. If fluids or particles penetrate the lamellar shell 20, they are discharged in a controlled manner through the separately provided chip channel 30 or 33 ^Λ . In particular, chips which reach behind the lamellar armor and are conveyed by the reciprocating movement thereof to the stationary end of the stroke of the working space cover 17 are taken up and removed by a catching space 38. The training of Nests outside the working space 12 and the impairment of the functioning of the machine tool 10 are effectively avoided.

Reference number:

Claims

Claims:

1. work space cover (17) for a machine tool (10), in particular a machine tool (10) for machining workpieces, with a lamellar armor (20) having a plurality of each rigid, mutually movable elongated slats (21 - 24), with a A plate carrier (26) on which the lamellae (21-24) are fastened so as to be pulled out into a sheet-like shell and pushed together to form a lamella packet, with one extending along the direction of movement (X, Y) of the plate carrier (26) Chips channel (33, 33) for removal of chips behind the lamellar shell (20).

2. work space cover according to claim 1, characterized in that the chip channel (33, 33) has two in the direction of movement (X, Y) of the disk carrier (26) extending walls (34, 35), between which the disk carrier (26) is kept movable.

3. work space cover according to claim 1 or 2, characterized in that a wall (35) extends into a gap which is formed between the lamellae (20) and the plate carrier (26).

4. work space cover according to claim 2, characterized in that the walls (34, 35) the chip channel (33, 33) are arranged delimiting.

5. work space cover according to claim 4, characterized in that the chips channel (33, 33) is formed open on the bottom side.

6. work space cover according to claim 4, characterized in ^¬ net, that the chips channel (33, 33 ^Λ ) is frontally open.

7. Work space cover according to one of the preceding claims, characterized in that the disk carrier (26) has a machine frame side end which is connected to a machine frame (13) or a member associated therewith, and a carriage-side end which with a movable carriage (19 ) of the machine tool (10) is connected.

8. work space cover according to claim 7, characterized in that on the machine frame side end of a receiving pocket ^¬ (36) for the lamellae (20) is formed.

9. work space cover according to claim 8, characterized in ^¬ net, that the receiving pocket (36) with the chips channel (33) is connected to transfer chips and / or fluids in these.

10. work space cover according to one of the preceding claims, characterized in that the chip channel (33, 33 *) is arranged opening into a Späneabführkanal (16) extending below a working space (12) of the machine tool (10).