Device for the mechanical deburring of pipes

Abstract

Device (1) for the mechanical deburring of pipes (10), with a. a housing (2) with a housing opening (3); b. a rotary drive (5) arranged inside (4) the housing (2); c. a deburring bushing (6) which can be driven by the rotary drive (5) in at least one direction of rotation, wherein the deburring bushing (6) is arranged inside (4) the housing (2) in such a way that it is accessible via the housing opening (3) for processing an end face (11) of a suitable tube (10), characterized in that the deburring bushing (6) can be actuated back and forth from a rest position to a driven position by pressing or pulling out the end face (11) of a tube (10) to be deburred into the receiving space (7) of the deburring bushing (6).

Description

[0001] The invention relates to a device for the mechanical deburring of pipes according to the features of claim 1. The invention therefore relates to a device for the mechanical deburring of pipes with a housing, wherein a rotary drive is arranged inside the housing and furthermore a deburring bushing is provided which can be driven by the rotary drive in at least one direction of rotation, wherein the deburring bushing can be automatically set into rotation from the outside by actuation with the end of a pipe.

[0002] A variety of deburring tools are known in the prior art. Deburring tools are generally used for internal and / or external deburring of pipes or the machined ends of pipes where a burr has formed as a result of machining. Deburring tools are known that have both an internal and an external deburring element, so that pipes can be deburred internally and externally simultaneously or sequentially.

[0003] Manual deburring bushings are used, especially in small-batch production or the regular manufacturing of individual tubes of varying lengths. These bushings are held in one hand by the operator and rotated over the end of the tube to be processed, removing the burr with manual twisting motions. A disadvantage of this method is that the results vary depending on the operator, and there is a risk of injury if the operator slips. To reduce the risk of injury and improve operator safety, it is therefore desirable to eliminate this risk of accidents.

[0004] Furthermore, there are automated processes in which the deburring tool is connected to a drive unit, and the operator clamps the pipe to be processed into a holder and works it with the device (e.g., a drill). For ease of use, prior art techniques include an adapter bell that is inserted into the drive unit. The adapter bell has a bayonet fitting that secures the deburring tool inserted into the adapter bell via a drive pin. However, connecting the deburring tool to the adapter bell is cumbersome, and the overall handling is time-consuming for the operator.

[0005] From DE 102007054523 A1, for example, a deburring tool is known for deburring the inside and / or outside of pipes. To enable coupling of the deburring tool to a drive, it is equipped with at least one drive lug. An adapter bell is also provided for connecting the deburring tool to the drive, which makes handling the deburring tool more difficult and cumbersome. To allow for easy handling of the deburring tool, the drive lug is formed by a shaft that lies on the axis of the internal and / or external deburring element of the deburring tool. With the drive lug, the deburring tool can be inserted, for example, into the chuck of a drill or into a socket of a drive unit. Further devices for deburring pipes are known from DE 29609780U1, DE 20319565U, and DE 29608602U1.

[0006] However, processing with existing tools remains cumbersome, time-consuming, and prone to injury when the operator handles the drill. They can also injure themselves if they slip. Furthermore, they require additional aids to clamp the pipes, as they typically need both hands to operate the drill.

[0007] Further devices for the mechanical deburring of pipes or aspects of such devices are also known from the documents US 2 793 473 A, EP 2 497 589 B1 and DE 39 29 733 A1.

[0008] The invention is therefore based on the objective of overcoming the aforementioned disadvantages and creating a device that is easy to handle, enables quick and safe operation and, in particular, avoids or at least significantly reduces the risk of injury.

[0009] This problem is solved by a device for the mechanical deburring of pipes according to the features of claim 1.

[0010] The basic idea of ​​the present invention is to provide a device with a rotary drive which has a housing, preferably a protective housing, in which a deburring bushing is recessed inwards (i.e. inside) and thus arranged in a way that protects against injury from contact, and furthermore, the rotary actuation of the rotary drive for rotating the deburring bushing is effected by pressing the pipe to be processed, so that the rotary drive is thereby activated and deactivated again when released.

[0011] This allows the operator to conveniently and safely machine a pipe without having to touch the device with their hands. Furthermore, the operator has the option of holding the pipe with both hands during processing.

[0012] According to the invention, a device for the mechanical deburring of pipes, in particular Trilogiq pipes, is therefore proposed, comprising a housing which has a housing opening, wherein a rotary drive is arranged inside the housing and wherein a deburring bushing which can be driven by the rotary drive in at least one direction of rotation is arranged inside the housing in such a way that it is accessible via the housing opening for processing an end face of a suitable pipe.

[0013] In an advantageous embodiment of the invention, the deburring bushing is designed as a cylindrical bushing open at one end with a receiving chamber, preferably a cylindrical or conical receiving chamber. Suitable deburring means, appropriate for the pipes to be processed, are located in the receiving chamber of the deburring bushing.

[0014] In a particularly advantageous embodiment of the invention, the housing opening is designed as a round opening in the housing wall, wherein the (front) end face of the deburring bushing, open towards the receiving space, is arranged in the housing between the inner and outer walls in the area of ​​the housing opening. In this way, the deburring bushing is arranged entirely within the interior and its tool opening projects only as far as or into the wall area, so that no tool section of the deburring bushing protrudes from the housing relative to the housing wall. This primarily serves to prevent the risk of injury.

[0015] Another aspect to prevent the risk of injury and to ensure simple and practical handling when deburring pipes lies in the fact that the rotary drive does not have to be manually switched on and off each time via a toggle switch or a push button, but indirectly via pressure on the pipe to be processed when it has been inserted into the receiving chamber of the deburring bushing.

[0016] According to the invention, the device is designed such that the deburring bushing can be moved back and forth from a rest position to a driven position by pushing or pulling the end face of a tube to be deburred into and out of the receiving space of the deburring bushing. Pushing the bushing automatically activates the rotary drive, and releasing it deactivates it again. In the rest position, the drive is therefore inactive and is actuated indirectly by pushing the bushing in.

[0017] This allows the operator to process a large number of pipes conveniently and safely in succession without the drive running continuously and continuing to rotate between processing operations on two pipes or pipe ends. The immediate shutdown of the drive when a pipe is removed eliminates the risk of injury from a rotating tool.

[0018] It is further advantageous if the wall thickness in the area of ​​the housing opening is greater than the wall thickness of the housing in the remaining or surrounding sections, and preferably by a factor of 1.5 to 2. This allows for a cost-effective housing design with an overall thin wall thickness, while the area around the deburring bushing features a reinforced wall. If necessary, the deburring bushing can be set further back, corresponding to the thickness of the wall, thus further reducing the risk of injury from accidental contact.

[0019] Furthermore, it can be advantageous to design the inner diameter of the housing opening to be slightly larger than the outer diameter of the deburring bushing, so that only a narrow gap exists between the wall and the outer surface of the deburring bushing, thus eliminating the risk of an object or finger getting caught. Another advantage is that no chips can escape.

[0020] Furthermore, it may be provided that the deburring bushing has an ejection port, for example in the form of an opening in the casing, which is designed to eject the resulting chips into the housing during deburring.

[0021] In a further preferred embodiment of the invention, the rotary drive is implemented by a pneumatic screwdriver. It is further advantageous if the deburring bushing is driven directly by the rotary drive without a gear mechanism.

[0022] The device is preferably provided with a lid that can close the housing, such that the inside of the housing is preferably accessible via a hinged lid in order to remove the chips on the one hand and to change the deburring bushing on the other.

[0023] Other advantageous embodiments of the invention are characterized in the dependent claims or are described in more detail below together with the description of the preferred embodiment of the invention with reference to the figures.

[0024] They show: Fig. 1 a top view of an embodiment of a device according to the invention and Fig. 2 a front view of the housing opening of the device according to Fig. 1.

[0025] In the Fig. 1 and Fig. Figure 2, which are described together below, shows an embodiment of a device 1 for the mechanical deburring of tubes 10, in particular Trilogiq tubes 10. The device 1 has a box-shaped housing 2 comprising a housing base 21 and four side housing walls 20, and furthermore a removable cover 22. One of the housing walls 20 is provided with a wall reinforcement 20a, so that the thickness of the housing wall in this area is approximately twice the wall thickness of the housing walls 20. The area of ​​the housing wall 20 with the wall reinforcement is provided with a round housing opening 3.

[0026] Inside 4 of the housing 2, a rotary drive 5 is also arranged. In the present embodiment, this rotary drive 5 is designed as a pneumatic screwdriver and is positioned by means of two holding devices 30a, 30b, such that a deburring bushing 6, which can be driven by the rotary drive 5 to rotate in at least one direction, is accessible via the housing opening 3 for processing an end face 11 of a (suitable) tube 10 to be processed.

[0027] The deburring bushing 6 is mounted directly without a gear on the drive shaft 5a, specifically at the end face of the rotary drive 5, and can be driven by it to rotate about the axis of rotation D of the drive shaft 5a. The rotary drive, designed as a pneumatic screwdriver 5, is supplied with compressed air via a compressed air hose 5b, which is routed from a unit through a wall opening.

[0028] The deburring bushing 6 is designed as a cylindrical, open-ended bushing with a receiving chamber 7, wherein the end face 8 of the deburring bushing 6 is arranged in the housing 2 slightly offset from the inner wall 2i of the wall reinforcement and towards the outer wall 2a in the area of ​​the housing opening 3. As a result, the end face 8 projects minimally into the housing opening 3.

[0029] The deburring bushing 6 can be moved back and forth from a rest position (inactive position) to a driven position (driven rotary movement) by pushing or pulling out the end face 11 of a tube 10 to be deburred into the receiving space 7 of the deburring bushing 6 in the axial direction of the drive shaft 5a, thus in and opposite to the orientation of the axis of rotation D.

[0030] In Fig. Figure 2 shows that the inner diameter Di of the housing opening 3 is only slightly larger than the outer diameter Da of the deburring bushing 6. The deburring bushing 6 has an ejection port designed to eject the chips produced during deburring into the housing 2. An example of this ejection port is shown in Figure 2. Fig. 1 shown through an opening in the outer surface of the deburring bushing 6. The cover 22 is designed as a removable cover, but can also be hinged or slidably mounted on the housing 2.

[0031] Furthermore, the housing can, for example, accommodate two drives side by side, one drive equipped with a deburring bushing 6 for external deburring and the other drive with a deburring bushing 6 for internal deburring of a tube. Alternatively, a deburring bushing 6 can be used that is designed as an interchangeable insert bushing for both internal and external deburring and can be mounted in two positions. In the first position, external deburring can be performed, while in the mirror-image position, internal deburring can be carried out.

[0032] The invention is not limited in its implementation to the preferred embodiments specified above. Rather, a number of variants are conceivable which make use of the solution presented even in fundamentally different designs.

Claims

[1] Device (1) for mechanical deburring of pipes (10), with a. a housing (2) with a housing opening (3); b. a rotary drive (5) arranged inside (4) the housing (2); c. a deburring bushing (6) which can be driven by the rotary drive (5) in at least one direction of rotation, wherein the deburring bushing (6) is arranged inside (4) the housing (2) in such a way that it is accessible via the housing opening (3) for machining an end face (11) of a suitable tube (10), characterized by , that the deburring bushing (6) can be moved back and forth from a rest position to a driven position by pressing or pulling out the end face (11) of a tube (10) to be deburred into the receiving space (7) of the deburring bushing (6). [2] Device (1) according to claim 1, characterized by , that the deburring bushing (6) is designed as a cylindrical, one-sided open bushing with a receiving space (7). [3] Device (1) according to claim 1 or 2, characterized by , that the housing opening (3) is designed as a round housing opening (3), wherein the end face (8) of the deburring bushing (6) is arranged in the housing (2) between the inner wall (2i) and the outer wall (2a) in the area of ​​the housing opening (3). [4] Device (1) according to any one of claims 1 to 3, characterized by , that the wall thickness in the area of ​​the housing opening (3) is greater than the wall thickness of the housing (2) in the remaining or surrounding sections. [5] Device (1) according to the preceding claim, characterized by , that the wall thickness in the area of ​​the housing opening (3) is greater by a factor of 1.5 - 2 than the wall thickness of the housing (2) in the remaining or surrounding sections. [6] Device (1) according to any one of the preceding claims, characterized by, that the inner diameter (Di) of the housing opening (3) is only slightly larger than the outer diameter (Da) of the deburring bushing (6). [7] Device (1) according to any one of the preceding claims, characterized by , that the deburring bushing (6) has an ejection port designed to eject the chips produced during deburring into the housing (2). [8] Device (1) according to any one of the preceding claims, characterized by , that the rotary drive (5) is a pneumatic screwdriver. [9] Device (1) according to any one of the preceding claims, characterized by , that the deburring bushing (6) is driven directly by the rotary drive (5) without a gear. [10] Device (1) according to any of the preceding claims, characterized by , that the housing (2) has a lid (22) which can be opened as intended, preferably hinged.

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