EP3001823A1 - Vorrichtung und verfahren zum schleifen von rotationsmessern - Google Patents
Vorrichtung und verfahren zum schleifen von rotationsmessernInfo
- Publication number
- EP3001823A1 EP3001823A1 EP14750716.4A EP14750716A EP3001823A1 EP 3001823 A1 EP3001823 A1 EP 3001823A1 EP 14750716 A EP14750716 A EP 14750716A EP 3001823 A1 EP3001823 A1 EP 3001823A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segment
- segments
- grinding
- cutting edge
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 37
- 238000005520 cutting process Methods 0.000 claims abstract description 265
- 235000013305 food Nutrition 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 11
- 230000001419 dependent effect Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 description 19
- 230000008569 process Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 235000013351 cheese Nutrition 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 235000013580 sausages Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
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- 238000007598 dipping method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
- B24B3/463—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades of slicing machine disc blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
- B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
Definitions
- the present invention relates to a device for grinding rotary knives, in particular sickle or circular knives, in particular for machines for slicing food products, for example sausage, ham, cheese or the like.
- the slicing machine may in particular be a high-performance slicer.
- the invention also relates to methods for grinding rotary blades.
- Rotary knives may wear and become dull so they need to be ground.
- Known rotary knife sharpeners use a copying plate which is a copy of the type of knife to be ground. In order to grind a rotary knife belonging to the knife type, the cutting edge present on the copying plate is traversed. This "Abfahrschul" is transmitted via a copying device to a grinding tool that moves the cutting edge of the rotary blade according to and grinds the rotary blade.
- the disadvantage here is that - in particular if several different types of knives are to be ground with a grinding device - a separate copy plate must be kept available for each type of knife. This not only costs. Rather, the time required to grind a rotary blade can be increased by the fact that the rotati- Onsmesser required copying plate must be attached to the grinding device before it can be started with the grinding.
- Another disadvantage is that a copy plate is only a "copy" of an unused rotary blade. Use-related wear and / or peculiarities on the cutting edge of the rotary blade to be ground are therefore not taken into account in the copying plate. This can lead to a non-optimal grinding result.
- Conventional grinders may further grind only one-piece rotary knives. On the other hand, if the rotary knives are divided into segments, conventional grinding devices can not be used.
- the present invention has for its object to provide a way by which a, in particular segmented, rotary knife can be ground in an improved manner.
- the device is designed for grinding rotary blades, which have at least two segments.
- a rotary blade can have any number of segments, for example two, three, four, five or more segments. In particular, therefore, there is no one-piece rotary blade.
- any arbitrarily shaped portion of the rotary blade can be considered in particular, which is separated from the rest of the knife, wherein all segments together form the rotary blade.
- the segments of a knife may in particular have the same shape and be designed, for example, the same.
- the rotary knife may in particular be a sickle knife with exactly one at least approximately spiral-shaped outer or cutting geometry.
- Such a geometry will hereinafter be referred to in the description and in the claims for the sake of simplicity also shortened as "spiral”, ie if below in the description or in the claims of a "spiral” or a “spiral shape” is mentioned, then it is generally to understand an at least approximately spiral-shaped outer or cutting geometry.
- the spiral may also be referred to as a sickle or wing. It can thus be e.g. a conventional sickle knife with a single spiral be divided into several segments. Furthermore, in particular sickle blades with several, for example, two, three, four, five or more, spirals are possible. Multi-spiral sickle knives are also referred to as multi-blade sickle knives or multi-spiral knives.
- each segment may have exactly one spiral.
- a cutting edge can run along one or each spiral.
- a circular knife which by definition has no spiral, is divided into several segments.
- each segment may be shaped in particular semicircular.
- the device comprises at least one receptacle on which at least one segment can be attached.
- the segments can be fastened together on the receptacle.
- a separate receptacle is provided for each segment.
- the segments can in particular be fastened individually.
- the attachment may in particular comprise a fixation in the circumferential direction and / or a centering of the segments.
- the device comprises at least one grinding tool, wherein the grinding tool and the segment mounted in the receptacle are movable relative to each other in such a way that an edge running on the circumference of the segment can be ground by the grinding tool.
- a pivoting device may be provided for the grinding tool, wherein the pivoting device may be configured such that the grinding tool is pivotable about a pivot axis which passes through a grinding point at which the cutting edge and the grinding tool touch during the grinding process.
- the grinding tool may comprise a grinding wheel which contacts the cutting edge at the grinding point and is pivotable about the pivot axis. Due to the pivotability of the grinding wheel to the running through the grinding point pivot axis of the grinding angle can be adjusted in a simple manner and in particular also changed during the grinding process, being designated as the grinding angle, the angle between the grinding wheel and the cutting edge. It is thus possible, for example, the grinding angle during the grinding process in dependence on a determined or predetermined
- the grinding tool may include a Abziehusion which forms at least approximately together with the grinding wheel a V-shaped receptacle for the segment and the blade touches at a Abziehddling.
- a Abziehusion which forms at least approximately together with the grinding wheel a V-shaped receptacle for the segment and the blade touches at a Abziehddling.
- burrs resulting from the grinding process can be removed from the cutting edge.
- the Abziehin is pivotable together with the grinding wheel and / or independently of the grinding wheel about the pivot axis, so that the peel angle, which includes the Abzieh- disc with the cutting edge, in particular changed during the grinding process and, for example, depending on determined cutting profile can be adjusted.
- the draw-off point also runs through the pivot axis, since then the draw-off point does not or only slightly “migrates" onto the draw-off disk when it is pivoted.
- the segment and the grinding tool can be positioned relative to one another such that, in particular during the grinding process, the pivot axis is aligned tangentially to the cutting edge present at the respective grinding point. In this way, a particularly good grinding result is achieved.
- the apparatus further comprises a measuring device for determining the course of the cutting edge of at least one segment and a controller, which is designed to use the determined cutting edge profile for controlling the relative movement between the grinding tool and at least one segment.
- the measuring device may be designed to detect a cutting edge or another feature of the segment that corresponds to the cutting profile and / or that allows derivation of the cutting edge profile as the cutting edge profile.
- the cutting edge can be detected particularly easily, for example by a light barrier, which favors the determination of the cutting edge profile.
- the feature which allows derivation of the cutting profile can be, for example, a plurality of elevations or an edge at the transition from a cutting area to a further inward area of the knife, which on one side of the knife body is the course are arranged following the cutting edge or is, so that the cutting edge profile can be derived from the detected course of the elevations or the edge.
- a knife with such elevations is known, for example, from DE 10 2009 006 912 A1.
- the measuring device can preferably work without contact. As a result, the measuring device can be protected against contamination and wear.
- the measuring device may have a detection range with which only a portion of the cutting edge can be detected.
- the position of the section can be determined relatively accurately and the cutting edge profile can be determined with sufficient accuracy from a plurality of detected positions of a plurality of cutting sections lying along the cutting edge profile.
- a selective detection of the cutting edge can also be provided so that the cutting edge profile can be determined from a plurality of points detected in this way, for example by interpolation.
- the measuring device and the segment can preferably be movable relative to one another in such a way that the cutting edge can be moved through the detection area of the measuring device and can be detected continuously or in sections.
- the cutting edge profile can be detected easily and quickly in the case of selective or sectional detection of the cutting edge.
- the measuring device can be designed to be movable. In this way it is possible, by moving the measuring device, to detect a section of the cutting edge that crosses the travel path as soon as it comes into the detection range of the measuring device.
- the measuring device may comprise a light barrier, in particular a fork light barrier. This allows a reliable measuring device can be realized simultaneously cost.
- the measuring device can be designed to determine the position at which the light barrier is interrupted or released by a section of the cutting edge, as a measured value for the position of this section. As a result, for example, the position of a section detected by the light barrier relative to a travel path of the light barrier can be detected. This is advantageous because the travel of the light barrier can be measured particularly easily, for example by means of an encoder which is coupled to a drive for moving the light barrier.
- the measuring device can be designed to use the set of all positions thus detected at least as the basis for the cutting edge profile.
- the positions can be assumed directly as a cutting profile or additional positions can be calculated, for example by interpolation, so that the cutting edge profile can be determined with high accuracy.
- the segment can be moved and the measuring device can be designed to determine the position of the segment.
- the measuring device can be designed to determine the position of the segment. This makes it possible to detect the positions in each case depending on the position of the segment and to determine the cutting edge profile, for example in the form of pairs of values, wherein a pair of values a detected position of a portion of the cutting edge, ie a part of the cutting edge profile, and the associated position of the Segment includes.
- the course of the cutting edge can be determined particularly easily if the segment can be rotated about an axis of rotation provided for the cutting operation and the measuring device can be moved linearly such that for a plurality of rotational positions of the segment by means of the measuring device, the position of a portion of the cutting edge of the segment can be determined.
- the cutting edge profile of at least one segment before the grinding process it is possible to determine the cutting edge profile of at least one segment before the grinding process.
- the cutting profile of each segment can be determined.
- Copy plates are therefore no longer needed.
- segment-specific wear and / or deviations of the cutting profile from the "ideal" course of a still unused knife or segment can be taken into account in this way, so that an optimal grinding result can be achieved.
- cutting profile is also understood to mean the course of the cutting angle, which can vary along the circumference of the knife, while the cutting edge is e.g. lies on a circle.
- the grinding device according to the invention can also be used to grind rotary knives having a plurality of segments.
- no one-piece rotary knife is received in the receptacle.
- the receptacle is designed in particular for receiving a segment.
- a separate receptacle can also be provided for each segment.
- a single grinding tool is provided, which grinds all segments.
- the control is also explicitly designed to grind individual segments, for example not a rotary knife as a whole.
- the controller must in this case be explicitly matched to the respective, in particular also differently shaped, segments.
- the invention also explicitly relates to a device and method for regrinding rotary blades or segments of rotary blades.
- the grinding can be carried out at least partially in a position in which the segments are arranged directly next to one another.
- the segments can be stretched flat and processed together.
- the processing of the segments can be coordinated with each other.
- the controller is adapted to operate on equal segments, i.
- Equally executed segments can result especially in circular knives or multispiral knives.
- a segment may, for example, be designed as a circular segment. If the circular blade comprises exactly two segments, the segments can each have a semicircular shape.
- the segments of the same design can be designed in particular as a spiral.
- the course of the cutting edge can in particular be stored and used, for example, for a further segment. A determination of the course of the cutting edge of another segment is thus not necessary in particular. This can save time. The grinding process can thus be made efficient.
- a one-time determined cutting profile can be used for all segments of the same design. Preferably equal segments can thus be ground according to the same criteria.
- a reading and / or writing device is provided, which is designed to describe a, in particular each, coupled to a respective segment memory device and / or a memory device of the grinding device, preferably an RFI D transponder, with data and / or read the data stored on it.
- Each segment can preferably comprise a memory device, in particular an RFID transponder or RFID chip.
- the storage device may in particular be attached to a side surface of the segment.
- the grinding device itself may also comprise a storage device.
- any storage media such as chips, memory cards, flash memory, USB sticks or SSD storage are possible.
- the data information can also be contained in barcodes or QR codes, which can be applied in particular to the segments.
- the data may in particular include the course of the respective cutting edge or data dependent on this course. For example, the course of the cutting edge of the first segment can be saved.
- the data may, for example, represent the control data for the grinding tool.
- the data may include cutting parameters, for example the cutting edge angle.
- the information may be included in the data, as often a corresponding segment or a rotary knife has already been ground.
- balance data of the respective segments can be stored. It can be achieved by means of the memory device assignment of the individual segments. A pairing of the respective segments can be ensured in this way.
- the data determined on the basis of the first segment which relate to the cutting profile of the first segment, can be transmitted to the storage device of the grinding device and / or to the storage device of at least one further segment.
- cutting profiles can be stored on segments whose cutting edge profile itself has not been determined.
- a separate receptacle is provided for each segment, wherein the receptacles and / or the segments held in the receptacles are spaced apart during grinding.
- the disadvantage that not the entire peripheral area can be ground.
- a so-called outlet region is provided, which can not be reached by a conventional abrasive device.
- Such a discharge area can be omitted in a separate processing of the segments, since the segments can be ground independently. Thus, cutting ranges of 360 ° are possible. Depending on the geometry of the segments, the cutting area can also be greater than 360 °.
- the segments can be ground in particular spatially separated from each other.
- the segments received in a grinding device may be spaced apart from each other.
- segments of the same design which are ground in a spaced-apart position, can be ground on the basis of data determined only on one segment.
- the recordings can in particular be permanently separated from each other locally.
- the receptacles are assigned to each other and / or relative to each other adjustable.
- the receptacles may preferably initially lie directly next to each other, so that the individual segments can be mounted together. Subsequently, if necessary, a Cutting edge course are determined. The recordings can then be moved apart. Here it is possible to adjust all recordings. Alternatively, a recording remain stationary while at least one further recording is adjusted. The movement of a recording can take place both in the plane of the rotary blade and vertically thereto, ie in the axial direction. The movements and distances are selected according to the measuring and grinding tools.
- the cutting edge profile of at least one of the segments can be determined. The determination of the cutting profile does not have to be done before adjusting the recordings.
- the grinding itself is preferably carried out in a position in which the receptacles are spaced apart.
- the grinding can also take place in a position in which the receptacles and thus the segments are arranged directly next to each other in order to match the segments to one another.
- the recordings can be adjusted to each other again. The individual segments can then be removed again in particular together.
- the invention also relates to a method for grinding rotary knives, in particular sickle or circular knives, in particular for a machine for slicing food products, for example sausage, ham, cheese or the like.
- the device for slicing food products may in particular be a high-performance slicer.
- rotary knives are ground, which have at least two segments.
- a grinding device according to the invention can be used.
- the course of a cutting edge of at least one segment is determined and at least one segment is then ground during a relative movement between the segment and a grinding tool.
- the relative movement between the segment and the grinding tool is controlled on the basis of the determined cutting profile.
- the segments can in this case, in particular jointly, be placed on a common receptacle. Also, the segments can be put together on different shots. Preferably, the segments are hereby clamped plane.
- the segments may be timed, e.g. by means of a handling device, are mounted on the grinding device. If the receptacles for the respective segments are spaced from each other, the segments can for example also be spatially separated from each other.
- a handling device may be used which comprises a plurality of sections. It is also possible to successively set up the segments on one, in particular the same, receptacle. The segments can therefore be ground consecutively in time.
- the segments are held on different receptacles, wherein the receptacles are adjusted relative to each other to provide a distance between the segments during the course of the cutting process and / or during grinding.
- the segments can be placed one after the other or at the same time on the different recordings. Subsequently, for example, the cutting edge profile, in particular of all segments can be determined. If the segments are the same, only the edge profile of a segment can be determined. Then the shots can be adjusted relative to each other. In particular, the recordings are moved apart, wherein all recordings or only one of the recordings can be adjusted relative to the other recording. For adjusting the recordings, an electric drive is provided in particular. However, the adjustment can basically also be carried out manually or pneumatically. In this case, both variable, preferably predetermined by the controller, positions and - alternatively - fixed positions are conceivable, for example, a clamping position and a machining position.
- the determination of the cutting edge profile can also take place only when the segments are separated from each other.
- a determination of the cutting edge profile can also be dispensed with altogether, if identical segments are used, of which the cutting profile is already known and stored, for example, in a memory device, in particular of the segments. If a distance between the segments is set, the segments can be ground. In this way, even with sickle blades cutting areas of 360 ° and greater can be achieved, since no outlet area is necessary, such as in one-piece sickle blades.
- the shots can be adjusted to each other again.
- one of the receptacles can be stationary while at least one other receptacle is being moved. If the segments are again arranged next to one another, they can be removed from the receptacles by means of a handling device.
- the segments can also be removed when the segments are spaced apart.
- a handling device for attaching a rotary blade comprising at least two segments, in particular a sickle or circular blade, to a blade receptacle, preferably to a device for grinding rotary blades or to a device for cutting food products with at least two parts, each of them Section is formed for receiving a segment.
- Such a handling device may also be referred to as a knife guard and, in particular, in addition to the holding function, also fulfill a number of other functions.
- the number of sections may correspond to the number of segments.
- the individual segments can be transported independently. The weight to be transported can be considerably reduced because the knife does not have to be moved as a whole.
- the assembly or disassembly of the individual segments on the blade holder by means of the respective sections of the handling device independently ofei- nander. So must also be held during assembly or disassembly preferably only one segment.
- the handling is significantly improved according to the invention, since not the entire knife has to be mounted, dismantled or transported all at once.
- the individual segments may be e.g. At any position, in particular on spaced apart blade receptacles, be placed separately on a Schleifvorrich- device.
- the individual segments can also be removed independently of one another.
- the cutting edges of the respective segments can be received in the sections.
- the sections can thus serve in particular as a blade guard.
- Each section can be adapted to the contour and / or size of the respective segment.
- the sections can be shaped as circular segments.
- at least a portion may have a crescent-shaped structure.
- the cuts can be made the same.
- a portion greater than at least another portion may be formed. This is particularly the case when a sickle knife with only one spiral is divided into two segments.
- the section which accommodates the spiral can in this case in particular be larger than the section which accommodates the segment which contains no spiral.
- the sections may in this case be designed in particular as semicircles with mutually different radii.
- the sections can be detachably connected to one another, in particular by means of a screw, latch, slide and / or clamping device. In principle, any composite devices are possible.
- the sections can thus be bolted together, for example. Also a bayonet lock is possible, for example.
- a magnetic connection of the sections may be provided.
- the sections can be connected to each other without tools and / or separated again.
- the sections can be connected to each other in particular for storage. A clear assignment of the recorded segments in the segments is ensured.
- the segments can preferably be reused in this way in pairs.
- the assembly or disassembly can be done by the detachable connection in particular together or individually.
- the sections can be connected or connected to each other in a position in which they are arranged, in particular flush, adjacent in a plane.
- the sections can be connected or connected to one another in a position in which they are arranged at least partially overlapping.
- the individual sections may in particular be located one above the other in different planes. Preferably, the sections may be arranged completely overlapping. An overlapping arrangement allows in particular a space-saving storage.
- protection is also claimed separately and independently of other aspects of the device described herein or the methods described herein.
- the same segments are ground successively.
- the segments can be placed successively or together on a recording or on different recordings.
- a cutting profile of a first segment is determined on the basis of a first segment. This cutting profile is used to control the relative movement between the grinding train and at least one other segment.
- a further segment can be ground on the basis of the data determined by the first segment.
- the further segment can in this case be placed on the same receptacle, in particular after removal of the first segment. It is also possible that the further segment is placed on a separate receptacle and ground there. In particular, the segments may be spaced from each other here.
- the cutting process can be optimized. In particular, this time can be saved because a renewed measurement of a preferably at least substantially identical edge profile is eliminated.
- differently shaped segments can each be ground with different grinding parameters.
- the differently shaped segments can also have an identical base structure.
- the difference between the segments results from the different grinding parameters.
- the different segments can be placed one after the other or together on one or on different shots.
- a separate edge profile can be determined for each segment.
- the cutting profile can also be removed, for example, from a storage device.
- the cutting parameters may in particular include the cutting edge angle and / or the course of the cutting edge.
- the cutting angle is the angle between a cutting plane perpendicular to the axis of rotation of the knife and a plane tangent to the cutting surface through any point on the cutting edge.
- the cutting angle determines, on the one hand, the influence on the product to be sliced and, on the other hand, the manner of depositing the respectively separated product slice by the rotary knife.
- the size of the cutting edge angle is selected as a function of the product and application-specific conditions.
- the cutting edge angle constant along the cutting edge always represents a compromise with respect to the products to be sliced.
- a cutting angle which is too great, ie an edge area that is too steep, should be avoided as far as possible This would put too much pressure on the product and thus expose the product to unacceptable compression.
- a small cutting angle, ie a relatively flat cutting surface results in gentle, gentle cuts that do not unnecessarily compress the product.
- the product slices can not be "wedged" in the desired manner.
- the differently shaped segments are ground in such a way that they each have a circumferentially varying, in particular continuously increasing or decreasing cutting angle.
- the cutting angle as a whole i. the cutting angle of the rotary blade, steadily increase.
- the cutting edge angle of the individual segments is selectively varied to a relevant extent along the cutting edge, which has noticeable effects in the cutting operation, in particular on the extent of the product upsets caused by the rotary knife and on the manner of the product deposits caused by the knife.
- the size of the cutting edge angle can be adapted to the course of the cutting process.
- the cutting edge angle can be chosen depending on which This cooperating peripheral region during the cutting process with the respective product.
- the setting options are no limits.
- the rotary blades can be individually optimized on account of the variability of the cutting edge angle according to the invention.
- the pivoting device for the grinding tool on at least one pivot bearing whose axis of rotation coincides with the pivot axis of the grinding tool.
- the grinding device can be pivoted in a simple manner by means of the rotary bearing during grinding and the grinding angle between the grinding wheel and the cutting edge can be optimally adapted. This is particularly advantageous in rotary knives whose cutting edge has a variable cutting angle.
- a one-piece knife with a variable cutting angle is known, for example, from EP 2 162 266 B1.
- the provision of a pivot bearing, the one with the Has pivot axis coincident axis of rotation, has the advantage that the grinding tool by a rotational axis occurring about the rotational movement extremely precise and correspondingsunan réelle pivoted around the grinding point and thus the grinding angle can be adjusted during the grinding process in a simple manner.
- the cutting edges of the segments are ground in such a way that they are adapted to one another.
- a cutting edge of the rotary blade with a continuously increasing or decreasing cutting edge angle results overall.
- the cutting edges of the segments can be adapted to each other such that the largest cutting angle of a segment is less than or equal to the smallest cutting angle of the adjacent segment.
- the rotary blade has a designated direction of rotation, wherein the cutting angle increases counter to the direction of rotation over all the edges of the segments.
- the cutting angle increases, i. the cutting edge on the outside of the blade, which is radially outwardly bounded by the cutting edge, becomes progressively steeper during the cutting process.
- the cutting angle can increase with increasing radial distance of the cutting edge of the rotation axis.
- the cutting angle can increase with increasing radial distance of the cutting edge of the rotation axis.
- Cutting edge have a dip area, with which the rotary blade is immersed under normal conditions of use during the cutting operation in a product to be cut, the cutting edge angle is smallest in the immersion area.
- the change of the cutting angle can be done without the formation of steps in the cutting surface.
- the cutting angle may e.g. in a range of about 15 ° to 30 °, preferably about 20 ° to 30 ° vary.
- the cutting surface may have a width that varies depending on the size of the cutting angle.
- the width may e.g. vary in a range of about 0.5 mm to 1, 5 mm.
- the cutting edge of the rotary blade can extend overall over an angle which is between 180 ° and 360 °. Even angles greater than 360 ° are possible with a corresponding design of the spiral.
- the differently shaped segments are ground such that they each have a mutually different, at least substantially constant cutting angle.
- one segment may have a cutting angle of about 15 °, while another segment may have a cutting angle of about 20 °.
- the grinding process can be realized in a simple manner. So the grinding angle does not have to be changed permanently.
- the cutting angles of the individual segments can be adapted to the respective cutting phase.
- the angle may, for example, be constant over a range of 80%, 90% or 95% of the total cutting edge of the respective segment.
- a deviating, variable angle can be provided in this case.
- a smooth transition between the segments is ground with different cutting angles.
- the different cutting angle can be adapted in the region of the transition in particular at least substantially to each other.
- both adjacent segments can be matched to each other.
- the grinding of the segments takes place together.
- the, in particular differently formed, segments each comprise an RFI D transponder, via which the segments of a rotary blade are assigned to one another.
- the respective segments can exhibit similar signs of wear, for which reason it can be advantageous for the respective segments of a rotary blade to always be ground in the same or at least similar intervals or always be used together during cutting operations.
- a newly selected pairing can also be stored on the RFI D transponders.
- any information carriers are conceivable instead of an RFI D transponder.
- the individual segments can also be assigned to each other in color.
- An assignment by means of barcodes or QR codes is basically possible.
- the invention also relates to a method for grinding a sickle blade with at least two equal spirals.
- at least two, three, four, five or more identical spirals may be provided.
- the sickle blade is hereby integrally formed, i. not divided into individual segments.
- the sickle knife can be used in particular for a machine for slicing food products, such as sausage, ham, cheese or the like. This may in particular be a high-performance slicer.
- a device for grinding is used. First, the course of a cutting edge of at least one spiral is determined by means of a measuring device and then at least one spiral is subsequently ground during a relative movement between the spiral and a grinding tool.
- the relative movement between the spiral and the grinding tool is controlled on the basis of the determined cutting profile.
- Equal spirals are successively ground on the basis of the cutting profile of a first spiral.
- the first spiral can be ground.
- Spirals, which are made equal to the first spiral can then be ground on the basis of the data of the first spiral.
- one respective cutting profile can be determined by the different spirals, which can be used to grind the respectively identically designed spirals.
- all the spirals of a sickle blade are made equal.
- edge profile determined by means of the first spiral can be used to control the relative movement between the grinding tool and at least one further spiral.
- each spiral or each segment may preferably comprise a memory device, in particular an RFI D transponder or RFID chip.
- the storage device may in particular be attached to a side surface of the spiral or of the segment. Basically, any storage media such as chips, memory cards,
- Flash memory USB sticks or SSD storage possible.
- the data information can also be contained in barcodes or QR codes, which can be applied in particular to the spirals or the segments.
- the data may include the course of the respective cutting edge or data dependent on this course, in particular cutting edge angles and / or cutting profiles.
- the course of the cutting edge of the first spiral or of the first segment can be stored.
- the data may, for example, represent the control data for the grinding tool.
- the data may also include cutting parameters, such as cutting angle.
- the information can be included in the data, how often one corresponding spiral or a corresponding segment has already been ground. Also, for example, balance data of the respective spirals or segments can be stored.
- the data determined on the basis of the first spiral or of the first segment, which relate to the cutting profile of the first spiral or of the first segment can be transmitted to the storage device of the grinding device and / or to the storage device of at least one further spiral or a further segment ,
- each spiral or each segment may have its own memory device, preferably an RFI D transponder or a chip.
- information which in particular contains the cutting parameters can thus be stored on each spiral or each segment.
- the cutting edge profile of a spiral or a segment is first determined.
- the spiral or the segment is then ground in particular.
- the determined data can then, at least in the meantime, be stored on the storage device of the spiral or of the segment and / or in the storage device of the grinding device.
- another segment can be spanned one after the other or together with the first segment and ground on the basis of the data contained in the memory device of the first segment or the memory device of the grinding device, which serve as default values.
- the data can then be transferred, in particular from the storage device of the grinding device, to the storage device of at least one further spiral or at least one further segment.
- spirals or segments can contain information about the cutting edge, which were not measured themselves.
- the grinding of the respective spirals or segments is coordinated with each other. The grinding is done in particular coordinated, ie not independently.
- the grinding may include a plurality of processing steps, in particular pre-grinding, grinding and / or regrinding.
- a processing step is performed on a first spiral or a first segment and then on at least one further spiral or a further segment.
- a further processing step is performed only after completion of a processing step.
- first a first spiral or a first segment can be pre-ground.
- a second spiral or a second segment can be pre-ground.
- a first spiral or a first segment can be ground.
- the grinding of the second spiral or of the second segment can take place.
- a regrinding of the first spiral or the first segment can take place.
- regrinding of the second spiral or of the second segment can take place.
- FIG. 1 is a side view of a device according to the invention for grinding rotary blades
- Fig. 2 is a side view of a two segments comprehensive
- FIG. 3 is a side view of a rotary knife with two spirals
- Fig. 4 is a side view of a two segments comprehensive
- FIG. 5 is a side view of a handling device
- Fig. 6 is a side view of a three segments comprehensive
- FIG. 7 shows a cross section of a segment according to FIG. 6.
- the grinding apparatus 1 shown in FIG. 1 is provided for grinding rotary blades 3 comprising a plurality of segments 2. Such rotary blades 3 are used, for example, in high-speed cutting machines for slicing food products, which are also referred to as slicers.
- a receptacle 5 is provided, on which a receiving opening 7 of the segment 2 is placed and on which the segment 2 is fastened (compare FIG.
- the grinding device 1 has a grinding tool 9.
- the segment 2 and the grinding tool 9 are movable relative to each other, so that a running on the periphery of the segment 2 cutting edge 1 1 can be ground by the grinding tool 9.
- the apparatus 1 Prior to the grinding, the apparatus 1 automatically determines the course of the cutting edge 1 1 by a measuring device 13, which is coupled to a controller 15, so that the determined cutting profile of the controller 15 can be provided.
- the controller 15 is in turn coupled to the grinding tool 9 and a drive (not shown) for the receptacle 5.
- the drive By means of the drive, the receptacle 5 and the segment 2 attached thereto can be rotated in a direction of rotation I and the controller 15 is designed to use the determined cutting profile for controlling the relative movement between the grinding tool 9 and the segment 2.
- the measuring device 13 has a fork light barrier 17 which is coupled to a linear motor (not shown) and arranged so that the fork light barrier 17 is located radially outwardly in front of the cutting edge 1 1.
- the forked light barrier 17 can be moved along a travel path II (see the double arrow in FIG.
- the fork light barrier 17 has a detection range within which a light path between a transmitter and a receiver (both not shown) of the fork light barrier 17 extends. If the forked light barrier 17 is moved towards the segment 2 from radially outside, the light path is interrupted by a section of a radially outer cutting edge 23 crossing the travel path II as soon as the section reaches the detection area. In case of Movement of the forked light barrier 17, the light path is released again as soon as the section leaves the detection area again.
- the segment 2 is rotated in the direction of rotation I, so that for a plurality of rotational positions of the segment 2 of the respective the path II of the forked light barrier 17 crossing portion of the cutting edge 23 can be detected.
- the determination of the course of the cutting edge 11 is then carried out from the set of sections thus detected.
- the respective position of the light barrier 17, based on the travel path II for example by means of an encoder coupled to the linear motor (not shown), determined by the measuring device 13 as a measured value for the position of a detected portion.
- the measuring device 13 is designed to determine the respective position of the segment 2, based on the direction of rotation I, in which the respective section is detected.
- the measuring device 13 is coupled to a position sensor, not shown, which is designed and arranged to detect the position of the segment 2, for example as a rotation angle relative to a zero point.
- the measuring device 13 therefore determines a multiplicity of value pairs in the described embodiment.
- a pair of values comprises the position of the respective section II of the cutting edge 23 crossing the travel path II, as well as the associated rotational position of the segment 2, determined in relation to the travel path II.
- the pairs of values determined in this way can be assumed directly as the cutting edge profile.
- the measured value which indicates the position of a section relative to the travel path II, can be converted into a distance value which indicates the distance between the respective section and the center of the receptacle 5 or the receiving opening 7.
- the course of the cutting edge 23 in polar coordinates with the center of the receptacle 5 or the receiving opening 7 can be determined as the origin.
- the measuring device could be designed, for example, such that an edge 51 of the segment 2 extending in accordance with the cutting edge 1 1 is detected. It is also conceivable in principle to determine the cutting edge profile by means of a camera and by image evaluation. A relative movement between segment 2 and measuring device 13 is therefore not mandatory for the determination of the cutting edge profile.
- the edge profile determined in this way is transmitted by the measuring device 13 to the controller 15 and stored there at least temporarily in a memory 25. Also, the cutting edge pattern on an RFI D transponder 26 of the segment 2 can preferably be stored permanently.
- a cutting path already stored on the RFI D transponder 26 or the memory 25 can be read out and used for grinding.
- the forked light barrier 17 is moved away from the segment 2.
- the processing of the cutting edge 1 1 takes place in a conventional manner by a grinding and Abziehsay 29, 31 of the grinding tool 9.
- the grinding tool 9 can be positioned relative to the segment 2 in such a way that, in particular during the entire grinding process, a pivot axis is aligned tangentially to the cutting edge 23 passing through the respective grinding point.
- the segment 2 is rotated in the direction of rotation I and thus moved past the grinding tool 9.
- the control 15 is designed to control the relative movement between the segment 2 and the grinding mechanism.
- the grinding tool 9 can be moved by means of a linear motor 55 along a travel path to keep the grinding point and the peel point in contact with the cutting edge 1 1, while the segment 2 is moved past the grinding tool 9. The grinding tool 9 is thus traced in order to compensate for the changing radius of the segment 2.
- a segment 2 can be placed on the receptacle 5.
- the measuring device 13 can then determine the course of the cutting edge 1 1.
- This history can be stored in the memory 25.
- the cutting edge 1 1 can now be ground with the grinding tool 9.
- the segment 2 can be removed.
- a segment 2 of the same design can be placed on the receptacle 5. Since the course of the cutting edge 1 1 corresponds to the course of the previous segment, the data contained in the memory 25 can be used to control the grinding tool 9. A renewed measurement of the snow history can thus be dispensed with.
- the course of the cutting edge 1 1 can be stored on the RFI D transponder 26 of the segment 2.
- a rotary blade 3 is shown with a spiral 57.
- an outlet 59 is necessary. Because the rotary blade 3 is divided into the segments 2, such an outlet 59 is no longer necessary.
- cutting 1 1 can be produced, which have a greater circumferential length.
- Dashed is in Fig. 2 in this case a Cutting range of 360 ° shown. Dotted is a cutting area of greater than 360 ° shown.
- the individual segments 2 can thus be placed successively on the receptacle 5 of the grinding device 1 according to FIG. An outlet 59 is unnecessary here.
- Each segment 2 can have an RFI D transponder 26 to which various data, for example a cutting profile, a cutting angle, the number of grinding passes already made or data with which the segments 2 can be associated with one another, are stored.
- Each segment 2 also includes recesses 61. These can serve, for example, for mounting and / or centering on a knife holder, in particular a slicing apparatus, or on a handling device.
- a counterweight 61 may be attached to the recesses 61.
- a rotary blade 3 with two spirals 57 is shown.
- the rotary knife 3 is in this case formed in one piece, i. not divided into segments.
- Such a rotary blade 3 can also be ground with a grinding device according to FIG.
- the rotary blade 3 can in this case be placed on the receptacle 5 via the receiving opening 7. Subsequently, for example, the course of a cutting edge 1 1 one of the spirals 57 can be determined. This course can be stored, for example, on the RFI D transponder 26.
- both spirals 57 can now be ground. A separate determination of the cutting edge profile for both identically formed spirals 57 is thus not necessary.
- a rotary blade 3 is shown, which is divided into two segments 2.
- the segments 2 are placed on different receptacles 5.
- the segments 2 can, for example, be ground together with a grinding device 1 according to FIG. 1, which accordingly comprises two receptacles 5. It is conceivable here that the receptacles 5 are already spaced from each other by design. Alternatively, it is also possible that the receptacles 5 are initially arranged next to one another. In this position, the segments 2 can be placed.
- the receptacles 5 can be adjusted relative to one another along an adjustment path III illustrated as a double arrow, so that the segments 2 are spaced apart from one another. In this spaced position no outlet 59 is necessary. Thus, cutting areas of 360 ° can be achieved.
- a handling device 63 with two sections 65 is shown.
- the sections 65 are designed to receive segments 2 of a blade 3 according to FIG. 4.
- the contour of the individual sections 65 is in each case adapted to the contour of the individual segments 2 of the blade 3.
- the sections 65 have different radii.
- Each section comprises a cutting receptacle 67, in which the cutting edges 1 1 of the segments 2 can be accommodated. Furthermore, each section 65 comprises two handles 69 and screws 71.
- the sections 65 can be placed individually on the segments 2 for disassembly of a knife 3. By means of the screws 71, which can engage in recesses 61 of the segments 2, the segments 2 can be attached to the respective sections 65. The segments 2 are then released from the receptacle 5 and can with the help of pieces 65 on the handles 69th be removed and transported.
- the sections 65 may be interconnected by means of a composite device 73, such as a detent, screw, clamp and / or slide device. The sections 65 can thus be connected in particular releasably to each other.
- a rotary blade 3 with three segments 2 is shown. Dashed is a cutting area of 360 ° and dotted by greater than 360 ° shown.
- the individual segments 2 can be ground sequentially or together.
- the grinding can e.g. such that the cutting edges 1 1 of the respective segments 2 have different cutting angle.
- the cutting edges 1 1 can have a steadily increasing cutting angle, for example.
- each of the segments 1 1 has a constant cutting angle.
- the segment 1 1 shown on the left-hand side can have a cutting edge angle of 15 °
- the middle segment 1 1 can have a cutting angle of 20 °
- the segment 1 1 shown on the right-hand side can have a cutting angle of 25 °.
- the cutting angle can be adapted to each other here, so that a smooth transition is ensured.
- the cutting edge 1 1 of at least one segment 2 can in this case at the transition region 75 to the
- Cutting edge 1 1 of the adjacent segment 2 can be adjusted. This is shown by the dashed line in Fig. 7, in which a cross section of a segment 2 is shown.
- the cutting edge 1 1 can thus have a different cutting angle from the remaining cutting edge 1 1 of the segment 2.
- the cutting angle of the cutting edges 2 of the rotary blade 3 according to FIG. 2 can also be made variable, in particular steadily increasing. Also mutually different cutting angle of the individual segments 2, for example 15 ° and 20 °, are possible in this case.
- the transition region 75 can be smoothed.
- Segmented rotary blades in particular with variable cutting angles and / or large peripheral lengths, can therefore also be ground in accordance with the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013217137.4A DE102013217137A1 (de) | 2013-08-28 | 2013-08-28 | Vorrichtung und Verfahren zum Schleifen von Rotationsmessern |
PCT/EP2014/067080 WO2015028285A1 (de) | 2013-08-28 | 2014-08-08 | Vorrichtung und verfahren zum schleifen von rotationsmessern |
Publications (2)
Publication Number | Publication Date |
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EP3001823A1 true EP3001823A1 (de) | 2016-04-06 |
EP3001823B1 EP3001823B1 (de) | 2017-12-13 |
Family
ID=51352494
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Application Number | Title | Priority Date | Filing Date |
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EP14750716.4A Active EP3001823B1 (de) | 2013-08-28 | 2014-08-08 | Vorrichtung und verfahren zum schleifen von rotationsmessern |
Country Status (3)
Country | Link |
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EP (1) | EP3001823B1 (de) |
DE (1) | DE102013217137A1 (de) |
WO (1) | WO2015028285A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015225667A1 (de) * | 2015-12-17 | 2017-06-22 | Volkswagen Aktiengesellschaft | Verfahren zur Bearbeitung eines Werkstückes mit einem Handhabungssystem |
DE112016005871A5 (de) * | 2015-12-21 | 2018-09-06 | Gea Food Solutions Germany Gmbh | Vorrichtung und Verfahren zum Schleifen eines Schneidmessers |
DE102016108346A1 (de) * | 2016-05-04 | 2017-11-09 | Weber Maschinenbau Gmbh Breidenbach | Vorrichtung und verfahren zum aufschneiden von lebensmittelprodukten |
BR102016020293A2 (pt) * | 2016-09-01 | 2018-03-20 | Mundial S.A. Produtos De Consumo | Sistema e método para monitoramento de utensílios em frigoríficos, e utensílio |
DE102020103045A1 (de) | 2020-02-06 | 2021-08-12 | Multivac Sepp Haggenmüller Se & Co. Kg | Messer sowie damit ausgestattete Aufschneide-Maschine |
DE102022112000A1 (de) | 2022-05-12 | 2023-11-16 | Dipl.Ing. S c h i n d l e r & Wagner GmbH & Co KG | Vorrichtung zum Schäfen und Verfahren zum Betrieb der Vorrichtung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004059479B4 (de) * | 2004-05-13 | 2006-04-06 | Astor Schneidwerkzeuge Gmbh | Rotationsmesser |
JP5016496B2 (ja) * | 2004-12-17 | 2012-09-05 | ミルウォーキー・エレクトリック・トゥール・コーポレーション | 動力工具用スマートアクセサリー |
DE102007040350A1 (de) * | 2007-08-27 | 2009-03-05 | Weber Maschinenbau Gmbh Breidenbach | Schneidmesser |
DE102009006912A1 (de) | 2009-01-30 | 2010-08-05 | Weber Maschinenbau Gmbh Breidenbach | Schneidmesser |
EP3175952B1 (de) * | 2011-06-06 | 2024-07-31 | Weber Food Technology GmbH | Vorrichtung und verfahren zum schleifen von rotationsmessern |
DE102012005566A1 (de) * | 2012-03-20 | 2013-09-26 | Weber Maschinenbau Gmbh Breidenbach | Vorrichtung und Verfahren zum Schleifen von Rotationsmessern |
DE102011103418A1 (de) * | 2011-06-06 | 2012-12-06 | Weber Maschinenbau Gmbh Breidenbach | Vorrichtung und Verfahren zum Schleifen von Rotationsmessern |
DE102013007275A1 (de) * | 2013-04-26 | 2014-11-13 | Weber Maschinenbau Gmbh Breidenbach | Lebensmittelaufschneidemesser mit einem Funktransponder |
DE202013005156U1 (de) * | 2013-06-07 | 2013-08-23 | Alfred Siemer | Vorrichtung zum Schleifen wenigstens eines Messers |
-
2013
- 2013-08-28 DE DE102013217137.4A patent/DE102013217137A1/de not_active Withdrawn
-
2014
- 2014-08-08 EP EP14750716.4A patent/EP3001823B1/de active Active
- 2014-08-08 WO PCT/EP2014/067080 patent/WO2015028285A1/de active Application Filing
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2015028285A1 * |
Also Published As
Publication number | Publication date |
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EP3001823B1 (de) | 2017-12-13 |
DE102013217137A1 (de) | 2015-03-05 |
WO2015028285A1 (de) | 2015-03-05 |
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