DD300155A7 - Device for driving and guiding a cutting bridge - Google Patents

Abstract

The invention relates to a device for driving and for guiding a cutting bridge for preferably numerically controlled glass panel cutting machines. With her a consistently high cutting accuracy and cutting speed can be achieved, the device has to show a good dynamic behavior with uncomplicated and space-saving design. According to the invention, this is achieved by arranging a drive centrally and rigidly on a cutting bridge which has two opposite, elastically deformable drive shafts, at the outer ends of the drive shafts are toothed wheels which mesh with toothed racks facing downwards. Before the sprockets are slightly movable and spring-loaded bearings mounted on the outer ends of the drive shafts in the vertical direction. Fig. 1 {drive; Guide; Schneidbruecke; Glass plate cutting machine; Cutting accuracy; Cutting speed, dynamic; Drive shaft, center, rigid, spring-loaded; teeth; Rack}

Description

For this 2 pages drawings

ZIoI the invention

It is a device for driving and guiding a cutting bridge, preferably for a numerically controlled glass sheet cutting machine for straight and curved cuts, created, which eliminates the disadvantages of known solutions. Above all, a consistently high cutting accuracy, high cutting speed, low wear, a good dynamic behavior and a low design effort to ensure.

Explanation of the essence of the invention

The invention has for its object to provide a device for driving and guiding a cutting bridge for preferably numerically controlled glass panel cutting machines for straight and curved cuts, the drive consists of a servomotor and a gearbox, with an automatic clearance compensation and thus a consistently hoho Cutting accuracy and cutting speed and a good dynamic Vorhalten is achieved, which works reliably and low-wear and has a simple and space-saving design.

Erfindur.gsgemäß the object is achieved with servomotor and gear existing drive, rollers and round guide rails characterized in that an automatic clearance compensation is achieved by the merger of the following features:

- On the drive two opposite, fixed by bending elastically deformable drive shafts,

- At the outer ends of the drive shafts are gears that intervene in fixed to guide rails racks.,

- At the outer ends of the drive shafts, immediately in front of the gears, slightly movable and spring-loaded bearings are mounted in the vertical direction,

the bearing housings bearing the bearings are slightly movable via pivot pins in the vertical direction,

- Underneath the bearing housings adjustable cup spring sets are arranged via set screws and lock nuts.

- The drive is centrally and rigidly arranged on a rear side of a cutting bridge.

The bearings of the drive shafts preferably each consist of a self-aligning ball bearings and are fixed to the cutting bridge via fixed bearing blocks. The toothed rod; η and attached to the guide carriers Rundfünrungsschienen have down facing teeth. The guide carriers are located on the right and left side above the working surface of the table.

embodiment

The accompanying drawings show in

FIG. 1 shows a section of the device according to the invention, FIG. 2 shows a plan view according to FIG. 1.

On the table frame 1 a numerically controlled »! Glass panel cutting machine, the guide beams 2 and 3 are mounted on the right and left, between which the cutting bridge 4 is arranged, which is located above the table 5 with the conveyor belt β for feeding or discharging the glass sheet 7. At the front of the cutting bridge 4, the movable cutting carriage 8 is arranged with the cutting head 9. The cutting bridge 4 and the cutting carriage 8 form a conventional XY cross slide arrangement with which the cutting head 9 can execute straight or curved cuts as a function of the specification of the numerical control. The leadership of the cutting bridge 4 is carried out in a known manner by the rollers 10 and 11 on the circular guide rails 12 and 13, which are fixed to the guide beams 2 and 3.

The consisting of the servomotor 14 and the transmission 15 drive the cutting bridge 4 is fixed by the screws 16 rigid and centered on the back of Schneidorücke 4. The transmission 15 has on the driven side two coaxial shaft ends, which are connected via the rigid shell clutches 17 and 18 with the drive shafts 19 and 20.

At the outer ends of the drive shafts 19 and 20, the gears 21 and 22 are mounted, which engage in the associated and provided with downwardly facing toothing racks 23 and 24. The racks 23 and 24 are attached to the guide beams 2 and 3. Immediately before the gears 21 and 22, the self-aligning ball bearings 25 and 26 are arranged on the drive shafts 19 and 20, which are located in the bearing housings 27 and 28.

The bearing housings 27 and 28 are attached via the pivot pins 29 and 30 η vertical direction slightly movable with the fixed bearing blocks 31 and 32 on the cutting bridge 4. Below the bearing housings 27 and 28 are plate spring packets 33 and 34, which are adjustable via the screws 35 and 36 and lock nuts 37 and 38 in height.

The disc spring assemblies 33 and 34 provide a constant vertical spring loading of the bearing housings 27 and 28 and thus also the drive shafts 19 and 20.

The effective spring force of the disc spring assemblies 33 and 34 can be adjusted via the screws 35 and 36 and the lock nuts 37 and 38.

The drive shafts 19 and 20 are dimensioned so that they are elastically deformed by flexion occurring in the game between the gears 21 and 22 and the racks 23 and 24 by the spring force of the disc spring assemblies 33 and 34.

With the device according to the invention it is achieved that the gears 21 and 22 at the end of the drive shafts 19 and 20 constantly rest under a spring bias on the racks 23 and 24 and thus an automatic clearance compensation is ensured. The required spring force of the disc spring assemblies 33 and 34 is relatively low and is composed only of the amount for the deformation of the drive shafts 19 and 20 and the radial components of the gears 21 and 22 together.

For example, the drive shafts 19 and 20 are dimensioned so that at a spring force of 8kp, the deformation at the outer ends of the drive shafts 19 and 20 is 0.3mm. Taking into account the radial components on the gears 21 and 22 in this case, a spring force setting on the plate spring assemblies 33 and 34 of about 28kp is sufficient.

However, these values depend on the max. Acceleration, the total mass of the components to be moved and the length of the cutting bridge. 4

The advantage of this arrangement is the fact that the drive, consisting of servo motor 14 and gear 15, is fixed and still a smooth and play-free transmission of the drive torque to the racks 23 and 24 is achieved with minimal effort and high rigidity.

The automatic clearance compensation results in an increase in the cutting accuracy and an automatic compensation of any wear on the rack drive and the guide elements.

At the same time, the demands on the parallelism and the straightness of the racks 23 and 24 and the edge guide rails 12 and 13 in the vertical direction are reduced.

The centrally located drive also causes a favorable mass distribution and a uniform Drehmornentenaufteilung to the left and right, so that a contribution made for a good dynamic behavior and a uniform, low load on the drive and guide elements is achieved.

Due to the fixed arrangement of the drive a complex movable drive suspension is not required.

This solution according to the invention simultaneously excludes vibration excitation via the drive suspension and thus contributes to a good dynamic behavior. Since the arrangement of the drive and guide elements a minimum vertical distance between the center of guidance, force application point on the racks 23 and 24 and the center of gravity of the cutting bridge 4 is given optimal dynamic conditions can be achieved.

The arrangement of the round guide rails 12 and 13 and the racks 23 and 24 with pointing down teeth on the guide rails 2 and 3 laterally above the table surface significantly reduces their contamination. An occurrence of foreign bodies, eg. B. of broken glass, between the guide elements and the rack drive is almost impossible. This results in low wear and minimal maintenance. Additional protective measures for dia racks 23 and 24 are not required.

Claims (5)

1. A device for driving and guiding a cutting bridge for preferably numerically controlled Glastafelsc.hneidmaschinen with actuator and gear existing drive, rollers and round guide rails, characterized in that an automatic clearance compensation is achieved by the functional merger of the following features: - On the drive two opposite, fixed by bending elastically deformable drive shafts, - At the outer ends of the drive shafts are gears that engage in racks attached to guide rails, - At the outer ends of the drive shafts, immediately in front of the gears, slightly movable and spring-loaded bearings are mounted in the vertical direction, the bearing housings bearing the bearings are slightly movable via pivot pins, - underneath the bearing housings adjustable cup spring sets are arranged via set screws and lock nuts, - The drive is centrally and rigidly arranged on a rear side of the cutting bridge. 2. Apparatus according to claim 1, characterized in that the bearings of the drive shafts consist of self-aligning ball bearings. 3. Apparatus according to claim 1 and 2, characterized in that the bearings are fixed on fixed bearing blocks on the cutting bridge. 4. Apparatus according to claim 1 to 3, characterized in that the racks have downwardly pointing, yerzahnungen and are fastened together with the circular guide rails on the guide carriers. 5. Apparatus according to claim 1 to 4, characterized in that the guide carriers are located on the right and left sides above the working surface of the table.