EP2500136A1 - Blasting plant with a blasting cabin - Google Patents

Abstract

The blasting machine (1) has a blasting cabin (10) with a closable and releasable opening (11) through which radiant workpiece (2) is introduced into and removed from blasting cabin. A radiating unit (13) such as fan blower irradiates the beam to the workpiece located in the blasting cabin, with an abrasive. The opening has two doors (12.1,12.2) which are alternately brought in the opening and closing position. Each door is provided with a workpiece holder (3) facing the interior side of the blasting cabinet in closed position of door.

Description

The present invention relates to a blasting installation with a blasting cubicle with a closable and releasable opening through which a workpiece to be blasted can be introduced into the blasting cubicle and removed from the blasting cubicle, and with at least one blasting device, such as a blasting wheel, by means of which the workpiece located in the blasting cubicle can be irradiated with a blasting medium.

Blasting systems of the aforementioned type are known from the relevant practice. In order to ensure that the workpiece to be blasted in the blasting cabinet is uniformly exposed to the blasting medium from all sides, a plurality of blasting devices with different blasting directions are used and / or the blasting work piece is moved in the blasting cabinet during blasting relative to the blasting device and to the blasting machine moved by this generated Strahlmittelstrahl.

Specifically, the shows DE 27 47 107 A1 a blasting system with a blast cabin with a closable by a door and releasable opening through which a workpiece to be radiated in the blasting cabin can be introduced and removed from the blasting cabin. Furthermore, the blasting system has at least one blasting device, by means of which the workpiece located in the blasting cabinet can be irradiated with a blasting medium. During the introduction of the workpiece into the blast cabinet and during the removal of the workpiece from the blast cabinet, blasting operation is not possible, resulting in relatively long unproductive times.

The DE 101 03 630 A1 shows a processing plant with a arranged in a processing cell processing robot with which a workpiece can be edited. The processing cell is bounded by walls, of which at least one wall has an opening with at least one rotatable about an axis of rotation Has workpiece receiving element. Preferably, two opposing openings are provided, wherein a first workpiece receiving element can be equipped on the externally accessible side of the machining cell with a workpiece to be machined, while at the same time a mounted on the opposite inner side of the machining cell on the workpiece receiving element workpiece can be edited with the processing robot. Disadvantageously, the processing cell must be accessible from several sides and the workpieces have to be removed both at different points of the processing cell, which leads to a large space requirement of the system and to a cumbersome supply and removal of the workpieces.

The US Pat. No. 3,309,818 discloses a blasting system with a blasting cubicle with a closable and releasable opening, through which a workpiece to be blasted can be introduced into the blasting cubicle and removed from the blasting cubicle. The blasting system has at least one blasting device, by means of which the workpiece located in the blasting cabinet can be irradiated with a blasting medium. Further, this document discloses the arrangement of a workpiece holder at the in the closed position to the interior of the blast cabin facing side of the opening of the blast cabinet associated door.

A disadvantage is considered that during the attachment of a workpiece to be blasted on the workpiece holder and during removal of the blasted workpiece from the workpiece holder beam operation is not possible, whereby here the effective service life of the blasting machine is limited.

For the present invention, therefore, the task of creating a blasting system of the type mentioned above, which avoids the disadvantages mentioned and in particular an improved economy by extending the effective service life is achieved.

The solution of this object is achieved according to the invention with a blasting system of the type mentioned above, which is characterized in that the opening of the blasting cabin associated with two doors that can be brought alternately in the open and closed positions, and that each door in its closed position to the interior of the Beam booth facing side is associated with a workpiece holder.

The blasting installation according to the invention thus has two doors at the opening of its blasting cabin, of which one or the other can be brought into the closed position and open position, as desired. Each of the two doors has a workpiece holder, wherein in each case the workpiece holder of the door in the closed position holds and carries a workpiece within the blasting cabinet during a blasting process. At the same time, the other door is in the open position, so that now the workpiece holder is accessible from the outside. With this accessible workpiece holder, therefore, another workpiece to be blasted can be brought into engagement even while the blasting process is still running, or a workpiece which has previously been blasted can be removed from the workpiece holder. Thus, during feeding of a workpiece to a workpiece holder and during discharge of a workpiece from a workpiece holder, the shotgun need not be stopped; Rather, these processes proceed simultaneously with a blasting process. As a result, the blasting system according to the invention achieves a particularly high efficiency, because their blasting device or blasting devices only have to be shut down for very short times, namely only when the door is transferred from its closed position to the open position and the other door from its open position to the closed position which only takes a very short time.

In order to adjust the doors of the blast cabin as simple and with little effort, it is preferably provided that the opening, preferably rectangular, is designed with two vertical edges and that each of the two vertical edges each one of the doors is hinged. The weight of the doors has so advantageous no force in the opening or closing direction, which allows a smooth pivoting of the doors.

Thus, the two doors do not interfere with their adjustment between closed position and open position and vice versa, each door is expedient by at least 90 °, preferably by up to 180 °, pivotable. The minimum amount of pivotability depends in particular on the dimensions of the respective workpiece to be machined, since this usually in the open position of a door is the most projecting towards the other door element. The swing angle of the doors must be at least so large that it certainly can not come to collisions.

In order to avoid a laborious and potentially dangerous manual operation of the doors, each door is preferably associated with a power drive for its pivoting. In this way, the pivoting of the doors can advantageously be remote-controlled. Each power drive can be performed, for example, hydraulically or pneumatically or formed by an electric motor.

To achieve a high level of operational safety, the invention further proposes that each door is assigned at least one locking device with which the door can be releasably locked in the closed position and / or in the open position. An undesired automatic adjustment of the doors during operation is thus reliably prevented. In addition, so the power drives for pivoting the doors in their closed position and / or open position can be relieved.

In order for a workpiece to be brought into and out of engagement with the respective workpiece holder as quickly and easily as possible, it is preferably provided that each workpiece holder has two grippers which are adjustable relative to one another and hold one another to hold the workpiece. The workpiece can thus be detected by the grippers with a small amount of time and kept sufficiently safe for a blasting process.

In order to reliably generate the forces necessary for gripping and holding a workpiece, each workpiece holder is expediently assigned at least one power drive for adjusting its grippers. Also, this power drive can be performed, for example, hydraulic or pneumatic or formed by an electric motor or electromagnet.

For mechanical support of the aforementioned power drives each workpiece holder for clamping of the grippers against each other at least one tension spring arrangement can be assigned.

In a further embodiment, the invention proposes that the grippers of each workpiece holder together with a workpiece held thereon can be rotated about a common axis of rotation. In this way, the workpiece can be rotated during a blasting process about the common axis of rotation of the gripper to achieve a uniformly uniform irradiation of the workpiece.

Preferably, the common axis of rotation of the gripper runs parallel to a surface plane of the associated door.

To generate the above-described rotary movement, each workpiece holder is expediently assigned in each case at least one geared or servomotor as a rotary drive for its grippers.

Furthermore, the invention proposes that each workpiece holder is rotatable about an axis of rotation perpendicular or oblique to a surface plane of the associated door. This allows a rotational movement of the workpiece during a blasting process about a second axis of rotation, which has a different direction than the aforementioned first axis of rotation. This leads to a particularly uniform all-round irradiation of the workpiece, even if only one jet device is provided in the blast cabin. The uniformity of the radiation becomes even better if two or even more blasting devices are arranged in the blasting cabin.

For generating the above-described rotary movement of the workpiece holder and the workpiece, each door is expediently assigned at least one geared or servomotor as a rotary drive for the associated workpiece holder.

Further, the invention provides that each gripper has a plurality, preferably three, adapted in their design and arrangement to the respective workpiece to be blasted and / or adjustable to adapt to the respective workpiece to be blasted finger. Advantageously, the fingers of the grippers form only punctiform small contact points to the workpiece, so that only minimal areas of the workpiece are not reached by the blasting medium. With only three fingers per gripper, a sufficiently positionally secure mounting of the workpiece in the workpiece holder is already achieved.

To be able to adapt the blasting machine as quickly and easily as possible to the processing of different workpieces, preferably the fingers of each gripper, preferably by means of a quick-change device, interchangeably connected to the respective remaining gripper. For the switching of the beam system from the machining of a workpiece to the processing of another workpiece so only a replacement of the fingers of the gripper is required.

Alternatively or additionally, the fingers of each gripper may be multi-membered and, preferably without tools, adjustable and lockable in their length and / or orientation. Thus, at least to a certain extent different workpieces can be held with the same grippers and replacement of the gripper is not necessary in any case with a change of the workpiece to be machined.

Blasting machines are often integrated into industrial production or processing lines that operate largely automatically. For this purpose, the invention proposes that the blasting machine has at least one workpiece handling robot, with each of which a workpiece before a blasting process one of the workpiece holder can be fed and after a blasting process of the respective workpiece holder is removable. In this case, the workpieces to be radiated are expediently fed via a conveyor device, from which the workpiece handling robot can take over a workpiece and feed it to the workpiece holder. On the other hand, the blasting system is expedient downstream of a laxative conveyor, to which the workpiece handling robot can each pass a blasted, removed from the workpiece holder workpiece.

In order to enable a reliable and largely automatic operation of the blasting machine, it preferably has an electronic control unit for controlling and monitoring active elements of the blasting machine, in particular the doors, the blasting device (s), the power drives, the locking devices, the workpiece holder, the gripper, the adjustable finger, the rotary actuators and / or the workpiece handling robot on.

Figur 1

eine Strahlanlage mit einer Strahlkabine mit zwei in Öffnungsstellung befindlichen Türen, in Frontalansicht,

Figur 2

die Strahlanlage aus Figur 1, nun mit der ersten Tür in Öffnungsstellung oder zweiten Tür in Schließstellung, in Frontalansicht, und

Figur 3

die Strahlanlage aus Figur 1 und 2, nun mit der ersten Tür in Schließstellung und der zweiten Tür in Öffnungsstellung, wieder in Frontalansicht.

In the following an embodiment of the invention will be explained with reference to a drawing. The figures of the drawing show:

FIG. 1

a blast machine with a blast cabin with two doors in open position, in front view,

FIG. 2

the blasting machine off FIG. 1 , now with the first door in open position or second door in closed position, in frontal view, and

FIG. 3

the blasting machine off FIG. 1 and 2 , now with the first door in the closed position and the second door in the open position, again in frontal view.

FIG. 1 The drawing shows a blasting machine 1, with a blasting cubicle 10, which has an opening 11 on its side facing the observer. The opening is made rectangular with two vertical edges, wherein at each of the two vertical edges of a door 12.1 and 12.2 is pivotally articulated. In the in FIG. 1 shown operating state, both doors are 12.1 and 12.2 in its open position, so that now the opening 11 of the blast cabinet 10 is free. By means of a respective locking device 16.1, 16.2, the two doors 12.1, 12.2 are releasably locked in their open position. In each case one of the two doors 12.1, 12.2 is selectively pivotable from the open position to the closed position. For pivoting the doors 12.1 and 12.2 are each an associated power drive 15.1, 15.2, which are each arranged above the two vertical edges of the opening 11 of the blast cabin 10.

With the blast cabinet 10, two blasting devices 13 in the form of blast wheels or centrifugal turbines are connected at the top left and bottom right, with each of which a fan-like blasting agent jet 13 'can be generated. Of course, the jet devices 13 can only be put into operation when the opening 11 of the blasting cubicle 10 is closed by one of the two doors 12.1, 12.2. The lower part of the blasting cubicle 10 forms a blasting funnel 14, in which the blasting agent collects and from where the blasting agent can be fed to a reprocessing device, which in FIG. 1 is shown schematically above the blast booth 10 and which is known per se.

The two doors 12.1 and 12.2 each have on their in the closed position to the interior of the blast cabinet 10 side facing a workpiece holder 3, with a workpiece to be radiated 2 is halterbar. For this purpose, each workpiece holder 3 has two grippers 31.1 and 31.2, which are each equipped with three fingers 32. The fingers 32 of the upper gripper 31.1 point down and the fingers 32 of the lower gripper 31.2 point upward. Between the fingers 32, the workpiece 2 is clamped. It is also possible to attach two or even more workpiece holders 3 to the doors 12.1, 12.2, which is for example for processing from in relation to the size of the blast cabinet 10 relatively small workpieces 2 may be appropriate.

The workpiece 2 is shown purely schematically in the drawing figures as a cube, which indicates the largest possible dimensions of the workpiece 2; In reality, the workpiece 2 usually has other shapes, but these can be virtually arbitrary.

For the purpose of clamping the workpiece 2 here is the upper gripper 31.1 relative to the lower gripper 31.2 displaceable in the vertical direction, as indicated by the double arrow on the workpiece holder 3.

The fingers 32 are rotatably connected to the respectively associated gripper 31.1, 31.2 and rotatable with a rotary drive 35 in rotation, so that with this the clamped workpiece 2 to the in FIG. 1 vertical axis 33 is rotatable. In addition, the fingers 32 are exchangeably connected to the respective associated gripper 31.1, 31.2 by means of a quick-change device in order to be able to use different adapted fingers or finger arrangements 32, depending on the shape of the respective workpiece 2 to be machined.

Furthermore, it is provided that each workpiece holder 3 is rotatably mounted in total on the associated door 12.1, 12.2 about a horizontal axis 30 and by means of a respective provided on the door 12.1, 12.2 rotary drive 34 can be set in rotation.

The workpiece 2 can thus be set in the workpiece holder 3 simultaneously by two mutually perpendicular axes of rotation 30 and 33 in rotation. This superimposed rotational movement ensures that the workpiece 2, which is located in the interior of the blasting cubicle 11 when the door 12.1 or 12.2 is closed, is uniformly hit and processed by the blasting abrasive jets 13 'on all sides. The two axes of rotation 30 and 33 do not have to be perpendicular to each other; an oblique, not rectangular course relative to each other is possible. Depending on requirements, the workpiece 2 can also be rotated only about one of the two axes of rotation 30, 33 during a blasting process, for which purpose suitably mutually independent rotary drives 34 and 35 are provided.

FIG. 2 the drawing shows the blasting machine 1 in a second operating state in which the first, left in the drawing door 12.1 is in the open position and the second, right in the drawing door 12.2 is in the closed position. As a result of the closed position of the second door 12.2 is a clamped to the workpiece holder 3 workpiece 2 now in the interior of the now closed blasting cabinet 10 and can be processed in this of the blasting abrasive jets 13 '. To generate the rotational movement of the workpiece holder 3 is the outside of the door 12.2 arranged, now visible rotary actuator 34th

While a workpiece 2 is being processed in the interior of the blast cabinet 10, an already blasted workpiece 2 can be removed from the workpiece holder 3 of the first open door 12.1 and then another workpiece 2 to be blasted can be inserted into the workpiece holder 3 on the first door 12.1. The removal and insertion of the workpieces 2 is preferably carried out by means of one or two workpiece handling robots, which are not shown here. Alternatively, the removal and insertion of the workpieces 2 can also be done manually.

When the blasting process for the workpiece 2 inside the blast cabinet 10 is completed, the blasting devices 13 are switched off and the door 12.2 is transferred by the power drive 15.2 from the closed position to the open position and locked by means of the associated locking device 16.2. Immediately thereafter, the first door 12.1 is pivoted with the clamped in the workpiece holder 3 further workpiece 2 by releasing the locking device 16.1 by the associated power drive 15.1 from the open position to the closed position, after which a new blasting process begins. This state of the blasting machine 1 is in the FIG. 3 shown, in which now the first door 12.1 is in its closed position and the second door 12.2 is in the open position. Now, the blasted workpiece 2 can be removed from the workpiece holder 3 of the second door 12.2, and then a new workpiece 2 to be blasted can be inserted into this workpiece holder 3.

Since a blasting workpiece 2 can simultaneously be removed from the workpiece holder 3 of the respectively open door 12.1 or 12.2 during a running blasting process and then clamped into a further workpiece 2 to be blasted into the same workpiece holder 3, the blasting machine 1 has only extremely short standstill times of its blasting devices 13, bringing a high level of profitability of the operation is achieved. At the same time ensures the rotation of the workpiece 2 in the blasting cabinet 10 about two different axes of rotation 30 and 33 a particularly uniform machining of the workpiece. 2

LIST OF REFERENCE NUMBERS

character description 1 blasting Machine 10 blasting cabinet 11 opening 12.1 first door 12.2 second door 13 Blasting device (blast wheel) 13 ' Blasting abrasive jet 14 Blasting material funnel 15.1, 15.2 Power drive for 12.1, 12.2 16.1, 16.2 Locking device for 12.1, 12.2 2 workpiece 3 Workpiece holder 30 Rotation axis of 3 31.1, 31.2 grab 32 finger 33 Rotary axis of 31.1, 31.2 34 Rotary drive for 3 35 Rotary drive for 31.1, 31.2

Claims (18)

Blasting installation (1) with a blasting cubicle (10) with a closable and releasable opening (11) through which a workpiece (2) to be blasted can be introduced into the blasting cubicle (10) and removed from the blasting cubicle (10), and with at least one Blasting device (13), such as a blast wheel, by means of which the workpiece (2) located in the blasting cubicle (10) can be irradiated with a blasting medium,
characterized,
in that the opening (11) is assigned two doors (12.1 and 12.2) which can be moved alternately into open and closed positions, and that each door (12.1, 12.2) has a workpiece holder at its side in the closed position towards the interior of the blasting cubicle (10) (3) is assigned. Beam installation according to claim 1, characterized in that the opening (11), preferably rectangular, with two vertical edges (11.1, 11.2) is executed and that at each of the two vertical edges (11.1, 11.2) each one of the doors (12.1, 12.2 ) is hinged hinged. Blasting system according to claim 1 or 2, characterized in that each door (12.1, 12.2) by at least 90 °, preferably by up to 180 °, is pivotable. Beam installation according to one of claims 1 to 3, characterized in that each door (12.1, 12.2) for its pivoting a power drive (15.1, 15.2) is assigned. Blasting installation according to one of claims 1 to 4, characterized in that each door (12.1, 12.2) is assigned at least one locking device (16.1, 16.2) with which the door (12.1, 12.2) can be releasably locked in the closed position and / or in the open position , Blasting installation according to one of Claims 1 to 5, characterized in that each workpiece holder (3) has two grippers (31.1, 31.2) which can be adjusted relative to one another and held against one another in order to hold the workpiece (2). Blasting system according to claim 6, characterized in that each workpiece holder (3) for adjusting the grippers (31.1, 31.2) is assigned in each case at least one power drive. Beam installation according to claim 6 or 7, characterized in that each workpiece holder (3) for clamping of its grippers (31.1, 31.2) against each other at least one tension spring arrangement is assigned. Blasting system according to one of claims 6 to 8, characterized in that the grippers (31.1, 31.2) of each workpiece holder (3) together with a workpiece held thereon (2) about a common axis of rotation (33) are rotatable. Blasting installation according to claim 9, characterized in that the common axis of rotation (33) of the grippers (31.1, 31.2) runs parallel to a surface plane of the associated door (12.1, 12.2). Blasting system according to claim 9 or 10, characterized in that each workpiece holder (3) is assigned at least one gear or servomotor as a rotary drive (35) for its grippers (31.1, 31.2). Blasting installation according to one of claims 1 to 11, characterized in that each workpiece holder (3) about a perpendicular or oblique to a surface plane of the associated door (12.1, 12.2) extending axis of rotation (30) is rotatable. Blasting system according to claim 12, characterized in that each door (12.1, 12.2) is assigned at least one gear or servomotor as a rotary drive (34) for the associated workpiece holder (3). Blasting system according to one of claims 6 to 13, characterized in that each gripper (31.1, 31.2) a plurality, preferably three, adapted in their design and arrangement to the respective workpiece to be radiated (2) and / or for adaptation to the respective to be radiated Workpiece (2) adjustable fingers (32). Blasting system according to claim 14, characterized in that the fingers (32) of each gripper (31.1, 31.2), preferably by means of a quick-change device, interchangeable with the respective remaining gripper (31.1, 31.2) are connected. Blasting system according to claim 14 or 15, characterized in that the fingers (32) of each gripper (31.1, 31.2) formed mehrgliedrig and, preferably without tools, in their length and / or orientation are adjustable and lockable. Blasting installation according to one of Claims 1 to 16, characterized in that it has at least one workpiece handling robot, with which one workpiece (2) can be fed to one of the workpiece holders (3) before a blasting process and, after a blasting process, by the relevant workpiece holder (3). is removable. Blasting installation according to one of claims 1 to 17, characterized in that it comprises an electronic control unit for controlling and monitoring active elements of the blasting installation (1), in particular the doors (12.1, 12.2), the blasting device (s) (13), the power drives (15.1, 15.2), the locking devices (16.1, 16.2), the workpiece holder (3), the gripper (31.1, 31.2), the adjustable fingers (32), the rotary drives (34, 35) and / or the workpiece handling robot, having.

Images