Cleaning method and cleaning device

Abstract

The invention relates to a method and a device suitable for removing, in particular stripping, annular or spiral chips (2, 3) from pin-shaped objects (1). Such chips may remain on the pin (1), for example, in a manufacturing method by turning. In this case, the method and the device are configured to position the portion of the pin to be cleaned in or below a plane defined by the two axes of rotation (60, 70) of the two roller brushes (80, 90), the portion of the pin to be cleaned being positioned in or below the plane, during the positioning, the portion of the pin to be cleaned being rotated by the two axes of rotation (60, 70) of the two roller brushes (80, 90). The bristles (100) of the two roller brushes do not contact a section of the pin (1) above the plane in the orientation of the pin in which the longitudinal axis of the pin forms an angle of more than 45 degrees, in particular 90 degrees, with the plane, the two roller brushes (80, 90) being rotated in opposite directions, and the bristles (100) of the two roller brushes (80, 90) being in contact with the section of the pin (1) above the plane in the orientation of the pin in which the longitudinal axis of the pin forms an angle of more than 45 degrees, in particular 90 degrees, with the plane. The bristles (100) of the two roller brushes (80, 90) are interleaved with each other and contact a section of the pin (1) to be cleaned.

Description

Field of the Invention

[0001] The present invention relates to a method and an apparatus for removing, in particular peeling off, annular or helical chips from a pin-shaped object. For example, in a manufacturing method by turning, such chips may remain on the pin. Background Art

[0002] During cutting, in particular turning, one or more chips may remain on the workpiece body. In particular, such chips may be configured annularly or helically and at least partially surround the body of the workpiece, such that it is not possible to simply brush off these chips from the surface or blow them off with compressed air. Such a workpiece 1 with annular chips 2 is schematically shown in Figure 1 and such a workpiece 1 with helical chips 3 is schematically shown in Figure 2 .

[0003] In addition, it may also occur that the chips do not completely detach from the surface of the workpiece and additional mechanical force is required to separate the chips from the workpiece. In this case, burrs may remain on the workpiece when separating the chips from the workpiece, which negatively affects the performance of the workpiece. The negative impact on the performance may be that the workpiece cannot be adapted to the structural space provided for the workpiece as scheduled during its use or that the burrs pose a risk of injury.

[0004] The workpiece 1 may be pin-shaped or may be a pin, where the pin has an elongated shape with a longitudinal axis 4. The pin may be rotationally symmetric about its longitudinal axis 4. The profile of the pin may vary along the longitudinal axis. For example, the pin may have one or more regions with a larger diameter and one or more regions with a diameter smaller than the larger diameter. The diameter of the pin may also vary continuously, for example conically or stepwise, along the longitudinal axis. In particular, the pin may have a head 5 at one end, the diameter of which is larger than the diameter of the elongated body of the pin.

[0005] Previously, such chips 2, 3 were identified by workers visually or tactilely and then manually separated from the workpiece 1 as needed and peeled off the workpiece. Here, if the worker removes the chips with his fingers, injury to the worker may occur.

[0006] In an automated process for producing, for example, a dialysis machine, it is additionally necessary to reliably implement a method for removing chips without the participation of workers. In particular, as many, preferably all, such chips should be removed in an automated method. Summary of the Invention

[0007] These tasks are solved at least in part by the method and apparatus described. Certain embodiments of the method and the apparatus can solve several of the described tasks.

[0008] Abstract of the Invention

[0009] The method is used to strip chips from a pin as a workpiece. For this purpose, the section of the pin to be cleaned is positioned in or below the plane defined by the two rotational axes of two roller brushes. In the positioning step, the bristles of the two roller brushes do not contact the section of the pin to be cleaned above this plane in the following orientation: in this orientation, the longitudinal axis of the pin forms an angle greater than 45 degrees, especially 90 degrees, with the plane. The two roller brushes rotate in opposite directions, and the bristles of the two roller brushes interleave and contact the section of the pin to be cleaned.

[0010] Furthermore, when the two roller brushes rotate, in the area of the section of the pin being contacted, the pin is moved against the movement of the bristles.

[0011] Since the bristles of the roller brushes do not contact the section of the pin to be cleaned along the longitudinal axis of the pin when positioning the pin, the risk can be reduced that chips are moved along the pin and thus reach areas outside the area that the bristles of the roller brushes can reach. This is achieved in particular by the fact that there is no contact with the pin in the orientation where one component of the longitudinal axis is perpendicular to this plane, especially forms an angle greater than 45 degrees, especially 90 degrees, with this plane.

[0012] The movement of the pin against the movement of the bristles can correspond to pulling the pin out of the area of the bristles. For example, the bristles can be moved downward between the two rotational axes of the roller brush, and the pin can be pulled upward. Here, when using this method, the terms "down" and "up" can be referred to the direction of gravity.

[0013] Here, the method can be set such that the longitudinal axis of the pin tilts 45 degrees or less relative to this plane during positioning, or the longitudinal axis of the pin is in the plane of the rotational axes of the roller brushes during positioning. This tilting of the longitudinal axis relative to the vertical orientation of the longitudinal axis relative to the plane defined by the rotational axes of the roller brushes reduces the risk of chip movement. More precisely, the smaller the angle between the longitudinal axis and the plane, the greater the risk.

[0014] The positioning step can have a movement parallel to the rotational axes of the roller brushes. In this parallel movement of the pin relative to the rotational axes, the pin can be moved parallelly from an area outside the area enclosed by the bristles of the roller brush into the area enclosed by the bristles. In this parallel movement, the bristles can move in the opposite direction, and during the parallel movement, the chips can already be moved in the rotational direction.

[0015] Furthermore, the positioning step may involve rotating the longitudinal axis of the pin from an orientation having an angle of less than 45 degrees, especially parallel to the axis of rotation of the roller brush, to an orientation having an angle greater than 45 degrees, especially perpendicular to the axis of rotation of the roller brush, with respect to the axis of rotation of the roller brush. Since in this embodiment, during positioning, the longitudinal axis extends, for example, parallel to the axis of rotation, chips do not move along the longitudinal axis on the pin. When the longitudinal axis of the pin rotates out of the plane defined by the axis of rotation of the roller brush, the bristles of the roller brush can cause the chips to move along the longitudinal axis, and chip peeling from the pin can be achieved.

[0016] The positioning step may include guiding the section of the pin to be cleaned from a region above the plane to a region in and / or below the plane, wherein during the guiding, the bristles of the roller brush do not contact the pin.

[0017] The pin may have a head at one end, the diameter of the head being larger than the diameter of the slender section of the pin, especially more than 1.5 times the diameter of the slender section of the pin, and the slender section of the pin also includes the section to be cleaned. Other ratios between the diameter of the head and the diameter of the slender section may also exist. No head may be provided at the other end. In the case of a pin having one head, the chips can be peeled off through the thinner end of the pin. When moving such a pin with a head, the thinner end of the pin leaves the area of the bristles last.

[0018] The bristles of the roller brush may be abrasive bristles or consist of abrasive bristles. In other words, all the bristles of the roller brush may be abrasive bristles, or there may be at least two different types of bristles, where one type of bristle may be implemented as an abrasive bristle, while the second type of bristle has no abrasive effect and / or only has a peeling effect. When using different types of bristles, the corresponding bristles may be evenly distributed on the surface of the roller brush. Thus, it can be achieved that the characteristics of the roller brush are largely the same along the axis of rotation of the roller brush.

[0019] The abrasive bristles have the following characteristics: relative to the material of the workpiece, the hardness of the abrasive bristles is relatively high. Thus, in addition to the peeling function achieved by the bristles and their movement during rotation, an erosion effect can also be produced, and burrs on the workpiece can be removed, for example. This can be important if the chips are still at least partially connected to the workpiece and are separated from the workpiece by the bristles. In this case, burrs may be left.

[0020] By combining the peeling function and the deburring function, two method steps that would otherwise be separate can be completed in one method step, and thus the method can be simplified.

[0021] Since the entire section of the pin to be cleaned is surrounded by the bristles in this method, it is possible, but not necessary, to dispense with the inspection. The inspection can include checking whether there are chips on the pin before using the method for chip removal and / or whether there are chips after using the method for chip removal. The inspection before and / or after use for removal can be combined with the method for chip removal.

[0022] For example, the inspection can be carried out by means of a camera and an image recognition method.

[0023] The result of the inspection can be used in this method so that only pins with chips are provided to the method for removal, and / or so that only pins without chips after using the method for removal are provided for further application of the pins. In other words, the method can have a step of inspection before and / or after the step of removal, and in addition include a step of providing to the removal process only when chips are recognized and / or a step of discarding the workpiece when chips are recognized on the workpiece after removal and / or a step of providing to re-removal when chips are recognized on the workpiece after the first removal.

[0024] The device for removing chips from the pin has at least two roller brushes with rotation axes arranged in parallel. The roller brushes can be set up for counter-rotation of the two roller brushes, where the bristles of the two roller brushes interleave. In addition, the device has a drive for driving the two roller brushes in such a reverse manner that the bristles move downward between the rotation axes during intended use, and a structural space can be provided in the device such that when the section of the workpiece to be cleaned, in particular the pin, is positioned in or below the plane defined by the two rotation axes of the two roller brushes, the bristles of the two roller brushes do not contact the section of the pin to be cleaned above the plane in the following orientation: in this orientation, the longitudinal axis of the pin has an orientation greater than 45 degrees, in particular 90 degrees, relative to the plane.

[0025] Here, the term "down" means the direction of gravity when the device is installed for use.

[0026] In addition, the device can include a round belt that extends above a first roller fastened to the rotation axis of the first roller brush, a second roller fastened to the rotation axis of the second roller brush, a third roller fastened to the drive axis of the drive, and a fourth roller fastened to the steering axis.

[0027] In addition, the device can have a first roller, a second roller, a third roller, and a fourth roller.

[0028] The steering roller can be arranged such that the first roller and the second roller rotate in opposite rotational directions.

[0029] The device may have a housing, in which a brush roller is arranged and a structural space is arranged between the housing wall and the area surrounded by the bristles.

[0030] In one embodiment, the housing may have an opening which, when the brush roller rotates, also opens outwards. This opening can be used to guide the workpiece to the roller brush. The problem with such an opening is that, for example, a user's finger or hand may enter between the brush rollers. The opening may have such dimensions and a shape that a finger cannot pass through the opening. The finger may be an ordinary finger of an adult. For example, the opening may be less than 3 cm 2 or 1 cm 2 . In an alternative embodiment, the frictional force of the round belt on the drive roller is such that a finger entering between the brush rollers causes the round belt to slip on the drive roller, or in other words, the drive roller rotates without moving the round belt. The frictional force between the round belt and the drive roller may be less than the frictional force between the element and the brush roller, where the diameter of the element is at least twice the diameter of the workpiece to be cleaned.

[0031] The device may have a clamp for clamping a pin, in particular the head of the pin, wherein the structural space has such dimensions that the clamp can intrude into the interior of the housing when positioning the pin.

[0032] The device may have a robot connected to the clamp. The robot can be programmed to automatically perform the positioning and movement of the pin as described in the context of the method for peeling.

[0033] The robot can be programmed to keep the longitudinal axis of the pin tilted at an angle of 45 degrees or less with respect to the plane when positioning the pin.

[0034] The robot can be programmed to keep the longitudinal axis of the pin in the plane defined by the two rotational axes of the two roller brushes during positioning.

[0035] The bristles of the roller brush may have abrasive bristles or consist of such bristles.

[0036] For example, the abrasive bristles may have the following properties, where those skilled in the art know that the abrasive bristles can be adapted to the individual requirements of the workpiece, in particular the material of the workpiece: polyamide threads mixed with an abrasive, such as nylon. The abrasive can use silicon carbide, alumina, chromium oxide, diamond or zircon, and its grain size is usually between 40 and 1000. A grain size between 240 and 360 has proven suitable for aluminum workpieces.

[0037] For example, the following brushes have proven to be suitable:

[0038] - Bristles: Nylon, fineness 320, brush diameter: approximately 80 mm, and at the time point of this application, it can be purchased, for example, as: EsportsMJJ Nylon Wheel Brush with Abrasive of fineness 320

[0039] - Bristles: Nylon, fineness 240, brush diameter: approximately 82 mm, and at the time point of this application, it can be purchased, for example, as: Sourcing Map 6 mm Shaft 82 mm Head Diameter Nylon Wheel Brush Grinding Tool with Abrasive of fineness 240, and

[0040] - Bristles: Nylon, fineness 320, abrasive: alumina, brush diameter: approximately 80 mm, and at the time point of this application, it can be purchased, for example, as: Polishing Brush, Nylon Brush for Deburring with Abrasive Alumina Steel Wire Brush.

[0041] The overlap of the bristles of the first brush and the second brush can be between 6 and 12 mm. For example, in the case of a very dense roller (many bristles) and a fineness of 320, an overlap of 6 mm has been proven to be suitable, for example. In the case of a less dense roller (fewer bristles) and a fineness of 240, the overlap can also be greater, and thus, good results are also obtained in the case of an overlap of 12 mm here. Depending on the system, other values can be applied.

[0042] The rotational speed of the brush can be between n = 40 1 / min and 70 1 / min, or n = 55 1 / min and 65 1 / min, or n = 60 1 / min. Higher or lower rotational speeds can also be used. Throughout the entire process from workpiece loading to workpiece unloading, the speed can be kept constant. When the workpiece needs to be cleaned, the rotation can be started automatically or manually by means of a control device. When the workpiece does not need to be cleaned, the rotation can be stopped. The rotation can be started and stopped via a speed ramp. The start and / or startup and / or stop and / or braking can be controlled by means of a robot SPS signal (SPS refers to a control device that can store programs).

[0043] The rotational axes of the two roller brushes can extend parallel to each other.

[0044] Unless otherwise clearly stated, whenever a numerical term is mentioned in this text, those skilled in the art will understand it to represent the lower limit in terms of numbers. Therefore, unless this leads to a contradiction that can be seen by those skilled in the art, when referring to "one" or "a", those skilled in the art always read it as "at least one" or "at least a". This understanding is included in the present invention in the same way as the following explanation: A numerical term, such as "one", can alternatively refer to "exactly one", as long as this is always technically achievable in a way that can be seen by those skilled in the art. Both are included in the present invention and apply to all numerical terms used in this text.

[0045] The terms "upper", "lower", "front", and "rear" should be understood as absolute or relative spatial descriptions in this document, in cases where there is doubt for a person skilled in the art. The absolute or relative spatial descriptions refer to the orientation of the relevant components during their normal use.

[0046] Whenever a method is described herein, for example, by means of a robot, the robot is implemented in the context of using a computer program and processing and other components (such as memory modules). The memory medium can be a digital memory medium, especially a non-volatile memory medium, especially in the form of a floppy disk, RAM, ROM, CD, hard disk, DVD, USB flash drive, flash memory card, SD card, or EPROM, and the memory medium can be read into and / or read out especially by means of a control signal that can be read electronically or optically.

[0047] The processor can be a conventional processor such as used in a desktop or laptop computer, but can also be a multi-core processor or a quantum processor. The method can be implemented in the context of using a server or a network of servers. The method can also be implemented by an autonomous robot that has a processor incorporated therein. A real cleaner with a roller brush can also be implemented without a processor, and the drive can be started only according to buttons and / or levers at a pre-given speed. There can also be setting possibilities, such as buttons or dials, by means of which the user can select or change the speed steplessly or stepwise.

[0048] Advantageous further developments of the invention are the subject matter of the dependent claims and the embodiments respectively. Description of the Drawings

[0049] The drawings show:

[0050] Figure 1 Schematically shows a workpiece in the form of a pin with annular chips;

[0051] Figure 2 Schematically shows a workpiece in the form of a pin with helical chips;

[0052] Figure 3 Schematically shows the flow of a method for stripping chips;

[0053] Figure 4 Schematically shows an embodiment of the flow of a method for stripping chips;

[0054] Figure 5 Schematically shows according to Figure 3 the stripping of chips by the method of;

[0055] Figure 6 Schematically shows for according to Figure 3Four possibilities I-IV for the positioning pin;

[0056] Figure 7 The device for chip removal is schematically shown in the front view and in the top view; and

[0057] Figure 8 An embodiment of the device for chip removal is shown in the perspective view and in the top view. Detailed Description of the Invention

[0058] When describing the embodiments with reference to the drawings, the same or similar features are marked with the same reference signs. Such same or similar features are not described again in each drawing, and for this purpose, reference is made to the previous description respectively.

[0059] Figure 3 The flow of the method for chip removal from the pin is schematically shown, and the chips are in the form of, for example, annular chips or spiral chips.

[0060] In the first step 10 of the method for chip removal from the pin, the pin is first positioned. The positioning according to step 10 includes positioning the section of the pin to be cleaned in or below the plane defined by the two rotational axes of the two roller brushes. In the positioning step, the bristles of the two roller brushes do not contact the section of the pin to be cleaned above this plane in the following orientation: in this orientation, the longitudinal axis of the pin is perpendicular to this plane.

[0061] In the second step 20, the two roller brushes rotate in opposite directions, wherein the bristles of the two roller brushes are interlaced and contact the section of the pin to be cleaned.

[0062] In one embodiment of the method, the two roller brushes have already rotated during the positioning according to step 10. In another embodiment, the rotation of the two roller brushes is started only after the positioning according to step 10.

[0063] If the chips are surrounded by the brushes, the chips can be moved along the long axis of the pin. In the case of the corresponding dimensions or length of the pin and the corresponding arrangement of the bristles, the chips can already be removed from the pin only by the rotation of the roller brushes and the interaction between the bristles and the chips.

[0064] In one embodiment of the method, in an optional third step 30, the section to be cleaned can be moved against the rotational movement of the bristles of the roller brushes. Here, "against the rotational movement" means the following direction: the bristles move in this direction in the area where they contact the section to be cleaned. Here, those skilled in the art know that the bristles move on a circular track around the rotational axis of the corresponding roller brush. For the clarification of the movement of the pin, also refer to Figure 5 .

[0065] If a movement or a positioning is described in this specification and the movement or positioning is characterized by a movement of one object relative to another object, then the movement always also includes the following corresponding embodiments: In the embodiments, one object remains stationary and the other object is moved relative to this object, and also includes the following embodiments: In the embodiments, both objects are moved.

[0066] In Figure 4 Another embodiment of the method is schematically shown. In addition to steps 10, 20 and, if necessary, 30 described in the context of Figure 3 the method may include one or more inspection steps 40, 50. The first inspection step 40 is performed before the positioning step 10 and includes checking whether there are chips on the pin. If no chips are found in the inspection step 40, the process can optionally be interrupted (not shown) and the pin can be provided for its application. After the step 30 of moving the pin, a second inspection step 50 can be provided. If no such chips are found in the inspection step 50, the pin can be provided for its application (not shown). If chips are found in the inspection step 50, the pin can be discarded (not shown) or alternatively the method can be performed again on the pin, in particular, the pin can be positioned again according to step 10 and traverse steps 20 and, if necessary, step 30.

[0067] In one embodiment of the method, especially in the case of automated execution of the method, this re-traversal can be performed according to a pre-given maximum number of traversals, and if this maximum number is reached, the pin can be discarded.

[0068] Both inspection steps 40, 50 can be provided, or only one of the two inspection steps 40, 50 can be provided. In particular, only the second inspection step 50 can be provided.

[0069] In one embodiment of the method, instead of or in addition to checking for the presence of chips, the inspection steps 40, 50 can also include checking for the presence of burrs.

[0070] This inspection can be carried out optically or mechanically. In the case of optical inspection, for example, a staff member can perform a visual inspection, or a camera can take an image, which can then be inspected by a staff member or analyzed by image recognition software. In the case of mechanical inspection, for example, a staff member can perform a tactile inspection, or a mechanical sensor interacting with the surface of the pin can recognize resistance when encountering chips.

[0071] Figure 5 Schematically shows according to Figure 3An embodiment of the method for peeling chips 2 and 3 from the pin 1. In Figure 5 A front view along the rotation axes 60 and 70 of the respective roller brushes 80 and 90 is shown. The roller brushes 80 and 90 have a plurality of bristles 100, and the roller brushes 80 and 90 rotate in opposite directions during peeling (shown according to the rotation arrows). Figure 5 I schematically shows the initial position of the pin 1 before positioning. Looking along the rotation axes 60 and 70, the pin 1 is located in front of the bristles 100. The section of the pin 1 to be cleaned can be the section where the chips 2 and 3 are located. When positioning in step 10 of the method according to Figure 3 shown, the pin 1 is moved backward along the rotation axes 60 and 70 so that the bristles 100 come into contact with the pin 1. As the roller brushes 80 and 90 rotate according to Figure 3 step 20 of the method shown, the chips 2 and 3 can be moved downward until the bristles 100 no longer touch the chips 2 and 3. If the length of the pin 1 is such that the bristles 100 contact the pin up to the end of the pin, the chips 2 and 3 can be peeled off the pin. Figure 5 II schematically shows the position of the pin 1 after moving the pin 1 a distance against the rotation of the bristles 100 in step 30 of the method according to Figure 3 shown, and Figure 5 III schematically shows the position of the pin 1 after moving the pin 1 completely out of the area of the bristles 100. The chips 2 and 3 are peeled off the pin at the latest when the movement of the pin 1 ends. Due to the movement of the bristles 100, the chips 2 and 3 can be transported out of the area of the bristles 100 in the direction of rotation of the bristles 100 and against the movement direction of the pin (not shown).

[0072] The pin 1 can have a head 5. The diameter of the head 5 can be larger than the section of the pin 1 to be cleaned. When the pin is positioned between the bristles, the head 5 can be at the height of the rotation axes 60 and 70 of the roller brushes 80 and 90 or can be above or below the rotation axes. After positioning, the section of the pin to be cleaned is in or below the plane defined by the rotation axes 60 and 70. Here, "below" refers to the following direction: the direction from which the bristles 100 approach the plane between the roller brushes 80 and 90 when the roller brushes 80 and 90 rotate, and "below" means that the pin 1 is on the other side of the plane. In other words, the bristles 100 approach from above the plane, and the pin 1 can be positioned in or below the plane.

[0073] Figure 6 Schematically shows four embodiments I - IV for positioning the pin according to Figure 3 the method. A top view is shown in the schematic diagram of Figure 6 .

[0074] The positioning according to embodiment I corresponds to the pin 1 as referred to in Figure 5The positioning described in I. In this embodiment of the method, the pin 1 is moved parallel to the axis of rotation into the region between the roller brushes 80, 90 such that the bristles 100 of the roller brushes 80, 90 contact the pin 1 in the section to be cleaned, the pin being oriented with its longitudinal axis perpendicular to the plane defined by the axes of rotation of the roller brushes 80, 90. In this movement, the section to be cleaned lies in this plane or, with respect to the space between the two roller brushes 80, 90 when the roller brushes 80, 90 rotate in opposite directions, lies on the other side of this plane where the bristles 100 enter. In this positioning step, the peeling of the chips can start immediately upon the first contact of the bristles.

[0075] In the case of the positioning according to Embodiment II, the longitudinal axis of the pin 1 is initially oriented parallel to the axes of rotation of the roller brushes 80, 90, more precisely in the region between the roller brushes 80, 90 and is not contacted by the bristles 100. For example, the pin 1 can be arranged above or below the roller brushes 80, 90. Then, while maintaining this orientation, the pin is moved or positioned into the region between the roller brushes 80, 90 such that the bristles 100 contact the pin. As long as the pin is in this orientation, the annular or helical chips 2, 3 cannot be peeled off the pin 1. Therefore, after this movement of the pin, the pin 1 tilts such that the longitudinal axis is oriented at least with a component perpendicular to the plane defined by the axes of rotation of the roller brushes 80, 90. In particular, the pin 1 can tilt until the longitudinal axis of the pin 1 is perpendicular to this plane. After this tilting, the section to be cleaned lies in this plane or, with respect to the space between the two roller brushes 80, 90 when the roller brushes 80, 90 rotate in opposite directions, lies on the other side of this plane where the bristles 100 enter. In this positioning step, the peeling of the chips 2, 3 can start at the beginning of the tilting.

[0076] In the case of the positioning according to Example III, the longitudinal axis of the pin 1 is also initially oriented parallel to the axes of rotation of the roller brushes 80, 90, more precisely in the region on the other side of the roller brushes 80, 90, for example in the region in front of or behind the said roller brushes. Here, the bristles 100 also do not contact the pin 1 initially. Starting from this initial orientation, similar to the positioning according to Embodiment I, the pin 1 is moved into the region between the roller brushes 80, 90 and then, similar to the positioning according to Embodiment II, the pin is tilted.

[0077] In the case of the positioning according to Embodiment IV, the pin 1 is first placed in the position for stripping the chips 2, 3 and arranged in the space between the two roller brushes 80, 90. The two roller brushes 80, 90 are spaced apart from each other so far that the bristles 100 of one roller brush 80 and the bristles 100 of the second roller brush 90 do not contact each other. The longitudinal axis of the pin 1 is initially positioned in a manner parallel to the rotation axes of the roller brushes 80, 90, more precisely in the region between the roller brushes 80, 90, without being contacted by the bristles 100. In a subsequent positioning step, the two roller brushes 80, 90 are moved towards each other until the bristles 100 of the two roller brushes contact each other and the pin 1 is contacted by the bristles 100. The section to be cleaned lies in this plane or on the other side of this plane with respect to the entry of the bristles 100 into the space between the two roller brushes 80, 90 when the roller brushes 80, 90 rotate in opposite directions.

[0078] In Embodiments I and IV, for the sake of clarity, the chips 2, 3 are not shown. In the embodiments of the pin with a head as shown in Embodiments II and III, in the views of Embodiments I and IV, the head may cover the chips 2, 3.

[0079] In another embodiment of this positioning, the pin 1 is moved on a U-shaped track. Initially, as in Embodiment I, the longitudinal axis of the pin 1 is initially oriented perpendicular to the plane defined by the rotation axes of the roller brushes 80, 90, where the section to be cleaned is arranged above this plane, more precisely in the region in front of or behind the roller brushes 80, 90. In Figure 6 this corresponds to the region above or below the rollers and in front of the schematic plane in the schematic plane. Then, the pin 1 is moved at least downwards until the section to be cleaned is arranged in this plane or below this plane. In Figure 6 this corresponds to the movement from in front of the schematic plane to in the schematic plane. Next, the positioning is carried out according to Embodiment I, i.e., moving along the rotation axis into the region between the roller brushes 80, 90. In a further step, the pin 1 is moved upwards out of the region of the bristles 100. In Figure 6 this corresponds to the movement out of the schematic plane forward from the schematic plane.

[0080] In Figure 7 a schematic illustration shows an embodiment of a device 200 for stripping chips from a pin. Here, Figure 7 I shows a front view of the device 200, Figure 7II shows a top view of the device 200. The device 200 has two roller brushes 80, 90. The rotational axes 60, 70 of the two roller brushes 80, 90 are arranged parallel to each other and can rotate in opposite directions. The bristles 100 of the two roller brushes 80, 90 are interlaced with each other at least in a sub-region between the roller brushes 80, 90. In addition, the device 200 has a drive 210. By means of the drive 210, the two roller brushes 80, 90 can be driven in opposite directions. The two roller brushes 80, 90 can be driven in such a way that when the device 200 is used as intended, the bristles 100 move downwards between the rotational axes 60, 70. In addition, a structural space 220 can be provided such that when the section of the pin to be cleaned is positioned in or below the plane defined by the two rotational axes 60, 70 of the two roller brushes 80, 90, the bristles 100 of the two roller brushes do not contact the section of the pin above the plane in the following orientation of the pin: in this orientation, the longitudinal axis of the pin forms an angle greater than 45 degrees, in particular 90 degrees, with this plane.

[0081] In one embodiment, the device 200 has a round belt 230 and at least four rollers. The round belt 230 extends above a first roller 240 fastened to the rotational axis of the first roller brush 80, a second roller 250 fastened to the rotational axis of the second roller brush 90, a third roller 260 fastened to the drive shaft of the drive 210, and a fourth roller 270 fastened to a deflection shaft 280.

[0082] By means of the round belt 230, the drive 210 can rotate the rollers 240, 250, 260, 270 and thus rotate the roller brushes 80, 90, the respective rollers 240, 250, 260, 270 being connected to the roller brushes.

[0083] The deflection roller 270 can be arranged such that the first roller 240 and the second roller 250 rotate in opposite rotational directions.

[0084] The roller brushes 80, 90 can be arranged in the first housing 290, and the rollers 240, 250, 260, 270 can be arranged in an optional second housing 300. The two housings 290, 300 can be separated by a wall 310. The rollers 240, 250, 260, 270 can be arranged and / or fastened on the outer side of the first housing 290, and the roller brushes 80, 90 are positioned in this first housing. The rollers 240, 250, 260, 270 can be fastened on the respective rotary shafts 60, 70 of the roller brushes 80, 90, and the rotary shafts can pass through the wall 310 of the first housing 290. At least one of the openings 320 in the wall 310 can be slit-shaped, through which the rotary shafts 60, 70 pass, and the rotary shafts 60, 70 can be capable of moving along this opening 320 in a plane formed by the rotary shafts 60, 70. In other words, the height of the slit-shaped opening 320 can be slightly larger than the diameter of the rotary shafts 60, 70. The height of the opening 320 can be between 101% and 110% of the diameter of the rotary shafts 60, 70. On the wall 320 of the housing 290 opposite to this wall 310, an elongated support part (not shown) can be arranged, which is mirror-symmetrical to the slit-shaped opening 320. Thereby, the roller brushes 80, 90 can be moved in parallel such that the rotary shafts of the two roller brushes 80, 90 always extend parallel to each other.

[0085] By moving the roller brushes 80, 90 along the opening 320, the tensile force applied to the circular belt 230 can be set and / or the following area can be changed: the area in which the bristles 100 are interlaced with each other.

[0086] In Figure 8 FIG. shows schematically an embodiment of a device 400 for peeling chips from pins. Here, Figure 8 I shows a perspective view of the device 400, Figure 8 II shows a front view of the device 400. The same or similar components that are also labeled in the device 200 are denoted by the same reference numerals, and reference is made to the Figure 7 explanation. The features of the embodiment according to Figure 8 can also be implemented in the embodiment according to Figure 7 and vice versa. In the device 400 of this embodiment, the rotary shaft is supported in the holding element 340. One of the holding elements 340 can be fastened to the two slit-shaped openings 20 and can move along this opening 320. In addition, a drive and / or a roller that can be arranged on the drive shaft and can be rotated by the drive can be fastened to a vertical slit-shaped support part, which is in the form of, for example, a slit-shaped opening 350, and the drive can be capable of moving along this vertical slit-shaped support part. By moving the drive, the tensile force applied to the circular belt can be set. In Figure 8All elements of this embodiment are not shown, especially as long as the elements have been described in the context of Figure 7 .

[0087] One or more drawers 360 may be provided in the housing 290 surrounding the roller brushes 80, 90, and the drawers may accommodate the stripped chips. The drawers 360 may be arranged below the roller brushes and may be accessible from the outside, especially from the side of the drive.

[0088] The drive may be implemented in a replaceable module 370 or as part of the module. The module may be introduced into, for example, pushed into the housing 290, and in addition to the drive, it also has rollers, and the drive moves other rollers via these rollers.

[0089] In another embodiment not shown, instead of some or all of the rollers and the round belt, gears that engage with each other are provided.

Claims

1. A method for peeling chips (2, 3) from a pin (1), the method comprising the step of positioning (10) a section of the pin (1) to be cleaned in or below a plane defined by two rotational axes (60, 70) of two roller brushes (80, 90). wherein, during the positioning (10), the bristles (100) of the two roller brushes (80, 90) do not contact a section of the pin (1) above the plane in the following orientation of the pin (1): in this orientation, the longitudinal axis of the pin (1) forms an angle greater than 45 degrees, especially 90 degrees, with the plane; the two roller brushes (80, 90) rotate in opposite directions (20), wherein the bristles (100) of the two roller brushes (80, 90) are interlaced and contact the section of the pin (1) to be cleaned.

2. The method for peeling chips (2, 3) from a pin (1) according to claim 1, the method comprising the step when the two roller brushes (80, 90) are rotating, in the region of the section of the pin (1) being contacted, moving (30) the pin (1) against the movement of the bristles (100).

3. The method according to claim 1 or 2, wherein, the positioning step (10) has a movement parallel to the rotational axes (60, 70) of the roller brushes (80, 90).

4. The method according to any one of the preceding claims, wherein, the positioning step (10) has a rotation of the longitudinal axis of the pin (1) out of an orientation parallel to the rotational axes (60, 70) of the roller brushes (80, 90), especially to an orientation perpendicular to the rotational axes (60, 70) of the roller brushes (80, 90).

5. The method according to any one of the preceding claims, wherein, the positioning step (10) includes guiding the section of the pin (1) to be cleaned from a region above the plane to a region in and / or below the plane, wherein during the guiding, the bristles (100) of the roller brushes (80, 90) do not contact the pin (1).

6. The method according to any one of the preceding claims, wherein, the bristles (100) of the roller brushes (80, 90) are abrasive bristles.

7. The method according to any one of the preceding claims, wherein, the longitudinal axis of the pin (1) is perpendicular to the plane during positioning.

8. The method according to any one of claims 1 to 6, wherein, the longitudinal axis of the pin (1) is tilted by 45 degrees or less relative to the plane during positioning.

9. The method according to claim 8, wherein, the longitudinal axis of the pin (1) is located in the plane during positioning.

10. An apparatus (200, 400) for peeling chips (2, 3) from a pin (1), the apparatus having two roller brushes (80, 90) having rotation axes (60, 70) arranged in parallel, the roller brushes being configured for opposite rotation of the two roller brushes (80, 90), wherein, The bristles (100) of the two roller brushes (80, 90) are interlaced with each other, and a drive (210), which is used to drive the two roller brushes (80, 90) in the reverse direction, so that the bristles (100) move downward between the rotary shafts (60, 70) when in use as intended, and wherein a structural space (220) is provided, and the structural space is designed such that when the section of the pin (1) to be cleaned is positioned in or below the plane defined by the two rotary shafts (60, 70) of the two roller brushes (80, 90), the bristles (100) of the two roller brushes (80, 90) do not contact the section of the pin (1) above the plane in the following orientation: in this orientation, the longitudinal axis of the pin (1) forms an angle greater than 45 degrees, especially 90 degrees, with the plane.

11. The device according to claim 10, wherein the device further has a round belt (230), which extends above a first roller (240) fastened to the rotary shaft (60) of the first roller brush (80), a second roller (250) fastened to the rotary shaft (70) of the second roller brush (90), a third roller (260) fastened to the drive shaft of the drive (230), and a fourth roller (270) fastened to the steering shaft (280). The first roller (240), the second roller (250), the third roller (260) and the fourth roller (270), wherein the steering roller (270) is arranged such that the first roller (240) and the second roller (250) rotate in opposite rotational directions.

12. The device according to claim 10 or 11, wherein the device further has a housing 290, and the brush rollers (80, 90) are arranged in the housing, wherein the structural space (220) is arranged between the wall of the housing (290) and the area surrounded by the bristles (100).

13. The device according to any one of claims 10 to 12, wherein the device further has a clamp for clamping the pin (1), especially the head (5) of the pin (1), wherein the structural space (220) has such dimensions that the clamp can penetrate into the interior of the housing (290) when positioning the pin (1).

14. The device according to claim 13, wherein the device further has a robot connected to the clamp, wherein the robot is programmed to automatically perform the positioning (10) and movement (20) of the pin (1) according to claim 1.

15. The device according to any one of claims 10 to 14, wherein the bristles (100) of the roller brushes (80, 90) are abrasive bristles.

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