DE10058677A1 - Automatic brush machine used for polishing or grinding hollow bodies comprises a brush support suspended on a swing formed by tilting levers connected to a machine frame and controlled by an adjusting and tilting device - Google Patents

Abstract

Automatic brush machine comprises a brush support (18) connected to an adjusting and tilting device and a rotating brush (20). The brush support is suspended on a swing formed by at least two tilting levers (34a, 34b, 36) connected to a machine frame. At least one tilting lever (36) is controlled by the adjusting and tilting device. Preferred Features: The adjusting and tilting device is an electric lifting cylinder (40), a hydraulic cylinder or a pneumatic cylinder.

Description

Automatic brushing machine with a brush holder, comprehensive a rotationally driven brush, the brush holder is connected to an adjusting and swiveling device.

Such brushing machines are used for. B. for polishing or Grinding hollow bodies such. B. stainless steel sink used. With such stainless steel sinks, it is a Sales argument that the sink is either high-gloss are or have a matt glossy appearance, whereby certain polishing patterns, for example starting in a star shape are desired by the spout.  

For example in sink, however, are both Side walls of the sink as well as the floor around you certain angle, which results from the one hand Manufacture of the basin itself results and on the other hand from the Necessity that water collected in it completely through to drain the drain.

It is necessary to adjust the inclination of the brush in relation to the To be able to adjust the horizontal to the brush on the Adjust the angle of inclination of the workpiece to be machined. In addition, an adjustment in the vertical, so the Z axis in space.

In known automatic brushing machines, the As a rule, preset the inclination of the brushes. This means a high set-up effort and an interruption of the Processing flow. A setting during editing can not.

Automatic brushing machines often consist of one Many similar processing stations. Then it becomes mostly an additional workstation with one already preset swiveled brush provided.

Solutions also exist in which the brush attached to a brush holder is attached by means of a  Cylinder is adjusted in inclination by the whole Brush unit and machine carrier is pivoted. such Adjustment mechanisms are structurally complex.

The problem with all brushing machines is that the Pivot point not on the line of contact between the brush and workpiece surface, but in a plane that is clear lies above lies. So there is a need the Y and Z axes, around which the brush is optimal Pivot point is brought out by pivoting, nachzukorrigieren.

If the brush is swiveled in one axis, it works this at the same time as a relative movement of the brush in it as well as the Z axis.

Such a relative movement of the brush is, however undesirable, because then the point from which the brushing movement, the z. B. takes place in a star shape, takes its exit, shifted becomes. A predetermined accurate polishing and brushing pattern can cannot be ensured in this way.

In addition, there is the problem that in the event that the swiveling during an ongoing machining cycle the axis corrections are to be carried out dynamically must be done so that an immense programming and Time would be necessary.

It is therefore an object of the invention to provide an automatic To provide brushing machine that allows the brush in the swivel or tilt the current machining cycle, without the need for extensive corrections in the axes.

The invention solves this problem by providing one automatic brushing machine with a brush holder, comprising a rotationally driven brush, the brush holder is connected to an adjustment and pivoting device, and the brush holder is suspended from a swing which via at least two swivel levers with a machine frame is connected and wherein at least one pivot lever through the Adjustment and swivel device can be controlled.

As it is cheap to avoid relative movement of the brush is when the fulcrum on the interface between Workpiece and tool lies from technical or spatial However, there is no possibility at this point for reasons To attach a pivot point, the pivot point should now placed approximately between the brush and the workpiece surface become. The pivot point should preferably be approximately one be a defined point, in many cases the brush will however, move on a small trajectory.

By the brush, especially including the drive unit, on one Traverse is suspended and the traverse over at least two Swivel levers or forks attached to the machine frame  and thus forms a screw, the pivot point can be approximately be laid in the contact area. Usually located the pivot point is clearly above the contact surface.

The pivoting is now done by moving the two Swivel lever, the entire brush holder including brush and z. B. drive unit is moved. The machine frame remains however unchanged.

A correction of the Z direction can be done, for example, via a linear axis arranged in the direction (Z direction) respectively. The relative movements in Z- and Y direction are approximately balanced, while still an adjustment of the angle of inclination of the brush is possible. In this way, it is a particularly simple one Adjustment of the angle of inclination of the brush to the angle of inclination of the workpiece to be machined. The brush pattern will significantly evened out, since it affects all areas of the workpiece the brush continuously and with the same brush pressure rests.

In particular, it should be provided that the swivel levers are so are designed that by the deflection of the pivot lever Brush holder approximately on a circular Link guide is movable, so that the brush holder a deflection or swiveling at the same time Swiveling movement and a horizontal linear movement is carried out.  

It can be provided that the brush holder on two free-swinging levers on both sides of the Brush holders are arranged and thus form the swing, is suspended and a third swivel lever is provided, which is connected to the adjusting and swiveling device. This third lever can be arranged in the middle between the two his. As an adjustment and swivel device, a electric lifting cylinder, a hydraulic or Serve pneumatic cylinders.

The geometry of the levers and the length ratios of the levers to each other as well as the distance of the levers in horizontal Direction and distance to the brush, d. H. the ratio of Pivots of the levers to the total pivot point are to be interpreted that the entire swivel arm (brush holder), i.e. the Swing, approximately the shape of a circular Scenery tour goes through. I.e. that at the same time Swivel movement, i.e. a rotary movement and one horizontal translational linear movement is performed. The Movements are designed so that the resulting Total movement of the brush holder a swivel movement executes an ideal pivot point (approximately).

It can be provided that the levers have different lengths, in particular the controlled lever a different, in particular greater length than the lever or levers not activated.  

The arrangement of the fixed and lot points and the different lever lengths cause one Rotation of the swivel lever the polishing brush in your Angular position changed.

It can therefore be provided that the pivot points of the Swivel levers are on their ends on the brush side and the Brush holder on the ends facing away from the brush Swivel lever is articulated.

In particular, it can be provided that the pivot point of the Brush with the center of the circular slide guide coincides.

The adjusting and swiveling device can by Machine control can be controlled, this adjustable Cams or encoders can include that by for example controlled an electric lifting cylinder can be to different points for that Start work program. In particular, it can be provided be that the brush at an angle of up to ± 20 ° is adjustable.

The entire process of brush adjustment can be done perform automatically during the polishing process.  

Overall, the design of an automatic brushing machine in the manner according to the invention results in a number of advantages:

• - Dynamic angle adjustment of the brush in the Processing cycle;
• - lowest axis compensation in the Z axis;
• - easy construction;
• - robust arrangement;
• - less control effort;
• - quick adjustment of the swivel angle;
• - simple backdrop control;
• - slight correction in the Y direction and
• - there is no adjustment mechanism negative change in the polishing pattern.

Further advantages and features of the invention result from the other registration documents. The features of the invention  can be used individually or in any combination be realized with each other.

In the following, it should be based on an exemplary embodiment Invention will be explained in more detail. Show:

Fig. 1 is an illustration of an automatic brushing machine;

Fig. 2 shows a section of a brushing machine according to FIG. 1 and

Fig. 3 is a schematic diagram relative to the Verschwenksystems of FIG. 1.

FIG. 1 shows an automatic brushing machine 10 with an L machine frame 12 with a machine arm 14 , on which the brush unit 16 , which is shown in its entirety in FIG. 2, is suspended. The brush unit 16 comprises a brush holder 18 with a brush 20 which can be driven in rotation, a side wall brush being shown here for example for a sink, the axis of rotation of which extends in the vertical direction. The entire brush unit 16 is suspended on an endless axis of rotation 22 . The arrows 24 and 26 represent the Z and the Y direction. For processing sinks, for example, for polishing them in the cavities (sinks), it is necessary to brush the brush 20 against the inclination of the sink wall (not shown) Adjust Y direction. However, the center of the brush 28 must not make any movement relative to the sink. That is, it is desirable that the center of the brush always take the same starting point when polishing, even if an inclination adjustment is carried out during brushing.

In addition, the entire brush unit 16 can be adjusted via the brush machine arm 14 by means of a linear axis 30 in the Z direction 24 .

In Fig. 2, the brush unit 16 is shown enlarged, the brush unit comprises a brush holder 18 which is suspended from a cross member 32 via three pivot levers 34 a and 34 b and 36 .

The pivot levers 34 and 36 are rotatably connected at their lower lever ends to the crossmember 32 , that is to say in a machine-fixed manner. The brush holder 18 is articulated at its upper pivot point. The levers 34 have a shorter length than the lever 36 . The levers 34 a and 34 b are arranged on both sides of the brush holder and form a swing together with the cross member 32 . The pivoting lever 36 can be adjusted in its angular position by means of an electric lifting cylinder 40 . By adjusting the angular position of the pivot lever 36 , the position of the pivot lever 34 is also adjusted.

There can be any points which have a measuring system can be detected or different pre-adjustable cams be approached, the various angular end positions of the brush define. These cams or any points can be during of the machining process by the machine control can be controlled. There are angles of up to ± 20 ° of the brush can be reached without a correction via the Y axis to have to perform.

The suspension of the brush 20 via the brush holder 18 on a swing 32 , 34 , 46 and the design of the lever lengths to one another and the distances between the levers 34 , 36 and the distances of the levers 34 , 36 from the brush 20 achieve that in the event of an adjustment there is no relative movement of the brush 20 in the Y direction in a hollow body to be brushed. Small changes in height due to the adjustment can be compensated for by means of the linear axis 30 .

The entire tilting process can be done during polishing be carried out, with constant angle corrections possible are.  

The drive unit 42 with the motor is also arranged on the brush holder 18 and is also moved during a pivoting movement.

The principle of the pivoting movement will be explained in more detail below with reference to FIG. 3.

Fig. 3 shows the brush holder 18 and the pivot levers 34 and 36. The pivot levers 34 and 36 are suspended on the cross member 32 at their lower pivot point 34 s or 36 s in a machine-fixed manner. At their upper pivot points 34 o and 36 o, the pivot levers 34 and 36 are connected to the brush holder 18 .

By pivoting the pivot levers 34 and 36 , the brush 20 is pivoted or tilted in the Y direction. The lever 36 is z. B. controllable via an electric lifting cylinder.

The pivot levers 34 , 36 have different lengths. They are designed in such a way that the deflection of the swivel levers 34 , 36 of the brush holder 18 can be moved approximately on a circular link guide 44 , which is shown in dash-dotted lines, so that the brush holder 18 pivots and at the same time performs a horizontal linear movement. This circular link guide 44 is approximated by the pivoting movement or the pivoting path of the two pivoting levers 34 and 36 , which are also shown in broken lines and are identified by 34w and 36w. The pivot point of the brush 20 should advantageously coincide with the center of the circular link guide 44 .

With a pivoting movement realized in this way, the deviation of the brush 20 from its optimum point in a hollow body to be brushed before the pivoting movement and after the pivoting movement is minimal. In this way, readjustments of the tilt angle can be carried out at any time during the brushing process, which has the advantage that no separate station with a pre-set inclined brush has to be kept ready as usual.

Changes in position of the tool, especially the Polishing brushes during the process also allow that problem areas of a workpiece are machined in a very targeted manner can be.

Complete editing is therefore in one Processing station possible.

Claims (13)

1. Automatic brushing machine with a brush holder ( 18 ), comprising a brush ( 20 ) which can be driven in rotation, the brush holder ( 18 ) being connected to an adjusting and swiveling device, characterized in that the brush holder ( 18 ) is suspended from a swing, which is formed by at least two swivel levers (34a, b, 36) which are connected to a machine frame ( 12 ) and wherein at least one swivel lever ( 36 ) can be controlled by the adjusting and swiveling device. 2. Automatic brushing machine according to claim 1, characterized in that the swivel levers (34a, b, 36) are designed such that the deflection of the swivel levers (34a, b, 36) of the brush holder ( 18 ) approximately on a circular link guide ( 44 ) is movable, so that the brush holder ( 18 ) simultaneously performs a swiveling movement and a horizontal linear movement when deflected or swiveled. 3. Automatic brushing machine according to claim 1 or 2, characterized in that an electric lifting cylinder ( 40 ), a hydraulic or pneumatic cylinder serves as the adjusting and pivoting device. 4. Automatic brushing machine according to one or more of the preceding claims, characterized in that the brush holder ( 18 ) is suspended from two free-swinging pivot levers ( 34 a, b) which are arranged on both sides of the brush holder ( 18 ), and a third pivot lever ( 36 ) is provided, which is connected to the adjusting and swiveling device. 5. Automatic brushing machine according to one or more of the preceding claims, characterized in that the machine-side pivot points ( 34 s, 36 s) of the swivel levers ( 34 , 36 ) are at their ends on the brush side and the brush holder ( 18 ) on the brushes ( 18 ). 20 ) opposite ends ( 340 , 360 ) of the pivot lever ( 34 , 36 ) is articulated. 6. Automatic brushing machine according to one or more of the preceding claims, characterized in that the pivot levers ( 34 , 36 ) are of different lengths, in particular the actuated lever ( 36 ) having a greater length than the pivot lever ( 34 ). 7. Automatic brushing machine according to one or more of the preceding claims, characterized in that the pivot point ( 28 ) of the brush ( 20 ) coincides with the center of the circular link guide ( 44 ). 8. Automatic brushing machine after one or more of the preceding claims, characterized in that the adjustment and swivel device by the Machine control is controllable. 9. Automatic brushing machine after one or more of the preceding claims, characterized in that the adjustment and swivel device includes adjustable cams or a measuring system, which can be approached by the machine control. 10. Automatic brushing machine after one or more of the preceding claims, characterized in that the brush adjustment during the Polishing process is feasible. 11. Automatic brushing machine according to one or more of the preceding claims, characterized in that the brush ( 20 ) can be inclined by an angle of up to ± 20 °, in particular ± 9 °. 12. Automatic brushing machine according to one or more of the preceding claims, characterized in that a linear axis ( 30 ) is provided for height adjustment of the brush. 13. Automatic brushing machine according to one or more of the preceding claims, characterized in that the entire brush unit ( 16 ) consisting of crossmember ( 32 ) and brush holder ( 18 ) is suspended from an endless axis of rotation ( 22 ).