DE10142429A1 - Multiple-blade cutter sharpening device has motor axis perpendicular to main displacement axis of retaining table - Google Patents

Abstract

The sharpening device (1) can sharpen multiple blade cutters (17). It has at least one motor (5) and a retaining table (2) which can be displaced relative to it. The retaining table has a retaining device (8) enabling the blades (7) to be fixed. The axis (6) of the motor is perpendicular to the main displacement axis of the retaining table.

Description

The invention relates to a device for grinding Multi-edge knives with a motor and a holding table moved relative to it, wherein the holding table has a holding device that clamps allowed at the point of symmetry of the knife, as well as a method for Grinding multi-edge knives.

At the present time there are devices for grinding Multi-edge knives, in which the multi-edge knife in the Device is clamped that the multi-knife after a Grinding a first area for grinding a second area mostly repositioned and aligned in a complex manner in the device must become. This is the case with some devices jammed multi-blade knives before the actual grinding process For example, scanned by a fan laser, among other things to determine the exact grinding position.

A disadvantage of the known devices for grinding Multi-knife is that the multi-knife between the first grinding process on the first cutting edge and the second The grinding process on the second cutting edge can be readjusted in a relatively complex manner have to, for example, a symmetrical cut in terms of Obtain grinding surfaces of the multi-edge knife.

The invention is based on the object, such devices for To further develop grinding of multi-edge knives.

The object of the invention is achieved by a device for Grinding multi-edge knives with one motor and one relative holding table moved for this purpose, the holding table being a holding device which allows clamping at the point of symmetry of the knife, and the holding device can be fixed relative to the holding table.

The relative fixability of the holding device to the holding table is Particularly advantageous in the case of multi-edge knives, since according to the invention Positioning, especially when realigning the Multi-edge knife after grinding a first cutting edge before grinding one second cutting edge of the knife is significantly simplified. This has under among other things, a significant reduction in the total processing time with regard to a multi-edge knife.

The motor of the device primarily serves to drive one Grinding tool with which the cutting of the Multi-edge knives are ground.

In particular, multi-blade knives, which as left and Right-handers are driven out, it is particularly effective to be able to grind advantageous if the holding device by means of a fixing device the holding table is arranged. For example Multi-blade knife for use in a lawn mower between left- and right-handed. According to the invention Holding device by means of a clamping means on the fixing device appropriate.

To, for example, left-handers and right-handers with the device for It is special to be able to process grinding quickly and advantageously advantageous if the device at least one more Has fixing device for a holding device. For example, one is Holding device arranged to the right of the grinding tool, thus To grind right-handed, and another holding device to the left of the motor, to prefer left-handed grinding. Here, the Depending on the application, the holding device is either on the left or on the right Fixing device can be arranged. For example, becomes a right-hander ground, it is fed to the grinding tool from the right. Becomes on the other hand, a left-handed rotor is ground, the grinding tool delivered from the left.

To, for example, the grinding device with regard to a Multi-blade knife from a right-handed to a left-handed or vice versa, it is particularly advantageous if the Holding device is arranged releasably. This makes it possible Holding device which is fixed to the first fixing device, for example on the right fixing device, in a simple way and To solve way from this first fixing device and to the other Attach fixation device, for example to the left Fixing. Here, the holding device can be fixed relative to the holding table.

It is particularly advantageous if the holding device has a hold-down device includes. The multi-knife is opened using the hold-down device structurally simple manner in the point of symmetry of the multi-bladed knife for example fixed on the holding table of the device.

A preferred embodiment variant provides that the holding device comprises a push rod tensioner. Using the push rod clamp can on the one hand the multi-knife on the holding table of the Grinding device to be fixed and the other is the fixation with the push rod clamp particularly easy to carry out and to solve again.

Through the holding device described above is under other a positioning, fixing and changing a position of the Multi-blade knife or a change of the complete Multi-blade knife is particularly simple and therefore considerably time-saving perform.

It is to optimize the actual grinding process significantly advantageous if a motor axis of the motor transverse to Main shift axis of the holding table is arranged. Advantageously, the Motor axis, on which the grinding tool is arranged, set in this way that, for example, almost always an optimal grinding angle can be adjusted. Due to the transverse arrangement of the motor axis the holding table moves relative to the main sliding axis of the holding table not parallel to the motor axis as usual, but rather in one Angle to it. This makes it possible, among other things, for others Grinding tools as conventional grinding wheels for grinding the Insert cutting.

The term "main axis of displacement of the holding table" means preferably the direction in which the holding table during of a grinding process is mainly relocated.

It is particularly advantageous here if a on the motor axis Cup is arranged. By means of the cup, which due to the Transverse adjustment of the motor axis now also for a grinding device of multi-edge knives can be used to advantage, can make far more precise cuts on the cutting edges of the Multi-blade knife can be made. Especially if the cup is a If the material is made of boron nitride, there is significantly less grinding dust than in known devices for grinding More cutting knives. This generally leads to a much cleaner one Grinding process, which among other things also the working conditions of a Operator of the device can be significantly improved.

It is understood that grinding tools other than the preferred one Cup can be arranged on the motor axis. This differs experience has shown that it depends on the requirements for the cutting edge of the cutting edge a multi-edge knife.

To a feed movement of the multi-knife relative to Grinding tool particularly easy to implement, it is advantageous if the holding table is movable relative to the cup wheel. Here, the Holding table with the multi-blade knife clamped relative to it the cup wheel can be moved manually, but also automatically.

To complete the entire machining process of a multi-edge knife accelerate, another embodiment variant provides that the Device comprises a further motor. This engine is preferably used to hold another grinding tool. Like already with regard to the first motor it is also the other motor advantageous to arrange a cup on its motor axis.

To the motors with their grinding tools with regard to the To position the multi-knife optimally, it is particularly advantageous if at least one motor can be moved relative to the holding table. in this connection it is beneficial if the motor is vertical with respect to the holding table is movable. The vertical mobility becomes here, for example Adjusting the grinding depth used. However, it is particularly advantageous if the engine additionally or only exclusively horizontally relative to Holding table is movable. With the horizontal movement of the motor can for example a feed movement or an infeed movement, which is otherwise carried out by the movable holding table become.

Due to the mobility of the engine, this is not just as usual Workpiece movable relative to the tool, but also the tool too the workpiece. This applies in particular to a delivery movement or Feed movement during the actual grinding process.

Horizontal mobility of at least one motor relative to the Holding table is also particularly advantageous if, for example, only one motor can be moved in the horizontal direction by two motors. For example, the multi-knife is turned on by means of the holding table a first cup of a first motor optimal for one Grinding process delivered. However, before the grinding process of the first cutting edge of the Multi-blade knife begins, the second motor can with its Grinding cup advantageously optimal on the second cutting edge of the Multi-knife can be positioned. Is the multi-edge knife positioned in relation to the two cup wheels of the two motors, the Grinding process of both cutting edges of the multi-cutting knife in one Grinding process.

For example, to complete the entire machining process To simplify multi-knife, it is advantageous if on the holding table a holding element is arranged, which in a holding table level Can be turned 180 °.

A holding element is advantageous to, for example, the Multi-blade knives can be positioned faster and easier in the grinding device. If, for example, a first cutting edge of the multi-cutting knife was ground and then the second cutting edge of the Multi-edge knife for grinding compared to the grinding tool to be positioned, this process is easier if the Multi-blade knife is arranged on a holding element. The The holding element thus serves to hold the multi-knife. The multi-blade knife is preferably on the holding element fixed before the holding element itself is placed on the holding table. This makes it possible to grind a large number Multi-edge knives, for example, for a faster grinding cycle prepare. For example, a multi-knife is opened each arranged a holding element, the multi-knife comprehensive holding elements successively fed to the holding table become.

With regard to automation of the device according to the invention, it is advantageous if the holding element can be fed to the holding table.

This also applies to feeding the holding element to the motors.

It is possible here to have several holding elements arranged thereon Multi-blade knives by means of a transport device dissipate, so that, for example, after the grinding has been done a multi-knife this knife with the holding element manually, but preferably automatically, out of the device and another holding element together with the multi-edge knife is supplied to the device.

It is proposed according to the invention that it is advantageous if the Device has a control panel, which in the lateral area of the Grinding device is arranged.

The term "lateral area" is preferably understood to mean the Area that extends along the main sliding axis of the holding table located.

An arrangement of the control panel in the side area is advantageous in that the actual grinding process is much better can be viewed by the operator. This makes it essential easier possible corrections, for example with regard to the Grinding angle, the grinding depth or other process parameters.

The term "control panel" preferably describes all of them Assemblies of the device, which are advantageous and simple Operation of the device with regard to electrical and / or mechanical Components of the device can be used.

For example, the grinder with a new one To equip multi-blade knives or a multi-blade knife, the first Cutting edge has already been ground to 180 ° in the fixture rotate, it is advantageous if the device has a protective hood has, the pivot axis in the direction of the main axis of displacement Holding table is arranged. Is the swivel axis of the protective hood in In the direction of the main sliding axis, the protective hood can be structurally be designed and operated particularly easily.

It is also advantageous here that the insertion, the repositioning as well as removing the multi-blade knife much easier can be designed as transverse to an arrangement of the pivot axis to the main direction of movement of the holding table.

In order, for example, to improve the grinding quality of a cutting edge of the To obtain a multi-blade knife, it is advantageous if the device has a microspray device for grinding cooling. A Micro spray device or a micro cooling device has opposite conventional cooling devices that have been used in devices for Grinding multi-edge knives are used, the great advantage that the machining area or grinding area is not excessive with Coolant is contaminated. In addition, the Microspray device for recycling excess coolant, for example in a collecting container. As a result, the Cooling device structurally particularly simple. When using a Microspray device can preferably select the coolant supply that there may be unnecessary coolant in small quantities evaporated. This will result in excessive contamination of the process room as well as in particular the workpiece.

The use of a microspray device is particularly in the Connection with the use of a cup made of boron nitride is advantageous because as described previously, when using a cup wheel Very little grinding dust is produced from boron nitride, which is associated with the Coolant can mix.

Advantageously, the grinding dust that accumulates only slightly and those supplied only slightly by means of the microspray device The amount of coolant almost hardly affects the process space of the device this in particular on the cleaning and maintenance work of the device according to the invention.

The object of the invention is also achieved by a method for sharpening multi-edge knives, in which the Multi-blade knives ground simultaneously and symmetrically on two blades becomes. Compared to known methods for grinding Multi-blade knives are used in the method according to the invention, for example both edges of the multi-edge knife are ground at the same time. It is easy to see that this includes, among other things, the Processing time of a multi-cutting knife with two cutting edges, for example almost half the processing time compared to one conventional device for grinding multi-cutting knives reduced.

Further advantages, goals and characteristics of the present invention will become apparent explained with reference to the description of the accompanying drawing, in which Examples of devices for grinding multi-cutting knives are shown.

It shows

Fig. 1 is a perspective plan view of the machining area of a device for grinding more cutting knives,

Fig. 2 is a side perspective plan view of the processing region of the inventive device of FIG. 1,

Fig. 3 is a schematic view of the apparatus of Fig. 1 and Fig. 2,

Fig. 4 is a further schematic view of the apparatus of FIGS. 1 and 2 additional having a function

Fig. 5 is a top perspective view of an alternative apparatus for cutting more cutting knives with two motors,

Fig. 6 is a schematic plan view of the alternative apparatus of Fig. 5,

Fig. 7 is a further schematic view of one face of the alternative apparatus of Fig. 5,

Fig. 8 is a schematic representation of the functional principle of a Mikrosprüheinrichtung for the inventive device,

Fig. 9 is a schematic plan view of a fixed with a quick clamping device multi-blade knife,

Fig. 10 is a partial perspective view of the fixed multi-blade knife of Fig. 9,

Fig. 11 is a detailed side view of a quick release device half with a threaded rod and

Fig. 12 is a top perspective view of the complete quick release device in interaction with a threaded rod.

The device 1 shown in Fig. 1 and Fig. 2 includes a holding table 2, two fixing devices 3 and 4, a motor 5 with a motor shaft 6, to which a grinding disc 7 is arranged, and a holding means 8. In this exemplary embodiment, the holding device 8 comprises a push rod tensioner 9 . To a shaft end 10 of the push rod 9 a hollow tensioner Anpresstopf 11 is arranged. The holding device 8 is arranged on the fixing device 4 by means of the clamping means 12 . In addition, the holding table 2 has a large number of further clamping means 13 , 14 , 15 and 16 . The cavity of the pressure pot 11 serves to receive a centering point of the holding table 2 .

A multi-blade knife 17 is placed on the holding table 2 such that it is securely fixed on the holding table 2 at its point of symmetry 18 by means of the holding device 8 .

The multi-cutting knife 17 has two cutting edges 19 and 20 , which are each successively ground by means of the grinding cup 7 . In addition to being fixed in its point of symmetry 18, the multi-knife 17 is also fixed to two stops 21 and 22 of the holding table. The two stops 21 and 22 are set by the clamping means 14 and 16 with respect to the holding table 2 with respect to an optimal grinding position of the multi-cutting knife 17 .

For grinding, the grinding table 2 is moved along the two double arrows 23 and 24 to the cup wheel 7 of the motor 5 . The approach or delivery of the multi-knife 17 with respect to the grinding plate 7 is done automatically. The feed movement of the holding table 2 in the left direction of the main displacement axis 24 takes place manually in this exemplary embodiment during the actual grinding process of the cutting edges 19 and 20 .

When the grinding process on the cutting edge 19 has been completed, the holding table 2 moves into a set-up position relative to the motor 5 . In this set-up position, the locking of the push rod clamp 9 is released , the multi-blade knife 17 being removed from its fixation and rotated through 180 ° with respect to the holding table plane, so that the cutting edge 20 is ground by the grinding cup 7 as described above after subsequent fixation by the push rod clamp 9 .

The fixing devices 3 and 4 are each angled by 90 ° in their rear area 25 and 26 . The angled ends 27 and 28 of the fixing devices 3 and 4 are designed such that a holding device 8 can be quickly and easily fixed on them by means of the clamping means 12 . The holding device 8 can thus be fixed relative to the holding table 2 .

The holding table 2 of the device 1 can be moved not only in the direction of the main displacement axis 24 and in the direction of the displacement axis 23 , but also along the displacement axis 29 .

The displacement axis 29 is aligned in such a way that it perpendicularly pierces the paper plane. The holding table 2 can thus be displaced vertically with respect to the motor 5 .

The motor 5 can be moved in the direction 30 or 31 along the displacement axis 29 . In addition, the motor 5 is pivotally mounted about an axis 32 . The pivot axis 32 of the motor 5 extends in the direction of the main displacement axis 24 .

In order to further optimize the grinding process, the multi-cutting knife 17 can be rotated about its point of symmetry 18 by 180 ° with respect to a plane of the holding table 2 . If, for example, the cutting edge 19 is finished, the multi-cutting knife 17 is rotated by 180 ° in accordance with the arrows 33 and 34 , so that the cutting edge 20 is thereby moved in the immediate vicinity of the cup wheel 7 .

The alternative device 35 from FIG. 5 comprises a movable holding table 37 , a first motor 38 and a further motor 39 along the direction of the arrow 36 . The holding table 37 can be displaced along an axis 40 . The motor 38 is movable in a vertical direction 41 with respect to the holding table 37 . The motor 38 comprises a motor axis 42 at the end of which a grinding plate 43 is arranged. The motor 39 of the device 35 can be moved in a vertical direction 44 with respect to the holding table 37 and additionally in a horizontal direction 45 with respect to the holding table 37 .

The horizontal direction 45 runs essentially parallel to the main displacement axis 36 of the holding table 37 . The motor 39 comprises a motor shaft 46 at the end of which a cup 47 is arranged.

A multi-blade knife fixed on the holding table 37 is only indicated schematically by its two blades 48 and 49 and its point of symmetry 50 .

The holding table 37 with the multi-blade knife arranged thereon is now moved towards the grinding cup 43 of the motor 38 in such a way that the grinding cup 43 is optimally positioned with respect to the cutting edge 48 . In addition, the cup wheel 47 can be moved along the axis 45 to the cutting edge 49 . If both motors 38 and 39 with their grinding cups 43 and 46 are each optimally positioned on one of the cutting edges 48 and 49 , the holding table 37 together with the multi-cutting knife is moved in the direction of the main displacement axis 36 and the cutting edges 48 and 49 are ground. The respective grinding depth can be adjusted by moving motors 38 and 39 along directions 41 and 44 .

It goes without saying that the motors 38 and 39 can also be pivoted in this exemplary embodiment in each case about a pivot axis 51 or about a pivot axis 52 for setting the cutting angle.

In order to optimally position the motors 38 and 39, for example, relative to the holding table 37 , the motors 38 and 39 can each be moved in a direction 53 and in a direction 54 , so that the cup wheels 43 and 44 are optimally positioned in relation to a multi-bladed knife for almost every application can.

It goes without saying that, depending on the application, the holding table 37 can also be moved only in the main displacement axis 36 , so that only the feed, in particular the feed during the grinding process, is thereby achieved. The respective positioning of the motors 38 and 39 then takes place along the displacement axes 45 , 53 and 54 .

If a device for grinding multi-blade knives 1 , 35 is equipped with a microspray device 55 , this microspray device preferably consists, among other things, of an outer tube 56 , into which a second smaller tube 57 is inserted. The area 58 of the microspray device 55 here forms a nozzle. The introduction of the tube 57 into the tube 56 results in a cross-sectional reduction in an area 59 , so that the flow velocity of the compressed air 60 applied increases in this area. This physical effect creates a negative pressure at the pipe opening 61 of the inserted pipe 57 , which is used to draw in cooling liquid 62 from a container 63 . In this exemplary embodiment, the intake quantity can be metered by changing the applied air pressure 60 as well as by a throttle valve 64 introduced into the tube 57 . The air-coolant mixture 65 is brought into the vicinity of the cutting edge 19 , 20 , 48 , 49 to be ground in each case with a downstream pipe system.

The multi-knife 66 shown in FIG. 9 is fixed in its point of symmetry 67 on a holding element 69 by means of a quick-action clamping device 68 . To a rotation of the multiblade knife 66 during the grinding process to suppress, the multi-blade knife 66 is fixed by means of a clamping means 70 in addition to the holding member 69th

The quick clamping device 68 preferably comprises two halves 71 and 72, the two folded as a quick-release device 68 halves 71 and 72 along its central axis having a bore 73rd

The half 71 in this case comprises two lugs 74 and 75 , which correspond to corresponding grooves in the half 72 in the sense of an adjusting device of the quick release device 68 . Half 71 as well as half 72 have a thread 77 in the upper region 76 of the bore 73 , which corresponds to the thread of a threaded rod 78 of a central point of the holding table 2 , 37 .

Two thirds of the length of the bore 73 has a larger diameter 79 than the threaded rod 78 , as a result of which the threaded rod 78 has play in this area 79 with respect to the half 71 and half 72 . Half 71 and half 72 have two circumferential grooves 80 and 81 , in each of which a rubber ring 82 can be arranged.

A conical area 83 is arranged above the groove 80 , with which the quick-action clamping device 68 can pull itself into the symmetry point 67 of the multi-cutting edge knife 66 along the threaded rod 78 in a self-centering manner.

If, for example, the quick-action clamping device 68 has not yet been arranged in the region of the centering point 18 of the multi-blade knife 66 , the halves 71 and 72 of the quick-action clamping device 68 are held together by means of at least one rubber ring 82 .

In this exemplary embodiment, the thread 77 is designed as a pointed thread, which considerably simplifies handling when tensioning and releasing the quick-action clamping device. It was found that the use of a more stable trapezoidal thread is not necessary.

Instead of a rubber ring 82 or in addition to the rubber ring, the two halves 71 and 72 can also be fixed to one another by means of at least one joint.

Claims (18)

1. Device ( 1 ; 35 ) for sharpening multi-cutting knives ( 17 ; 66 ) with a motor ( 5 ; 38 , 39 ) and a holding table ( 2 ; 37 ) which is moved relative thereto, the holding table ( 2 ; 37 ) being a holding device ( 8 ), which allows clamping at the point of symmetry ( 18 ; 50 ; 67 ) of the knife ( 17 ; 66 ), characterized in that the holding device ( 8 ) can be fixed relative to the holding table ( 2 ; 37 ). 2. Grinding device ( 1 ; 35 ) according to claim 1, characterized in that the holding device ( 8 ) by means of a fixing device ( 3 , 4 ) is arranged on the holding table ( 2 ; 37 ). 3. Grinding device ( 1 ; 35 ) according to one of claims 1 or 2, characterized in that the device ( 1 ; 35 ) has at least one further fixing device ( 3 , 4 ) for a holding device ( 8 ). 4. Grinding device ( 1 ; 35 ) according to one of claims 1 to 3, characterized in that the holding device ( 8 ) is arranged detachably. 5. Grinding device ( 1 ; 35 ) according to one of claims 1 to 4, characterized in that the holding device ( 8 ) comprises a hold-down device. 6. Grinding device ( 1 ; 35 ) according to one of claims 1 to 4, characterized in that the holding device ( 8 ) comprises a push rod tensioner ( 9 ). 7. Grinding device ( 1 ; 35 ) according to one of claims 1 to 6, characterized in that a motor axis ( 6 ; 42 , 46 ) of the motor ( 5 ; 38 , 39 ) transverse to the main displacement axis ( 24 ; 36 ) of the holding table ( 2nd ; 37 ) is arranged. 8. Grinding device ( 1 ; 35 ) according to claim 7, characterized in that a grinding cup ( 7 ; 43 , 47 ) is arranged on the motor axis ( 6 ; 42 , 46 ). 9. Grinding device ( 1 ; 35 ) according to one of claims 1 to 8, characterized in that the holding table ( 2 ; 37 ) is movable relative to at least one cup wheel ( 7 ; 43 , 47 ). 10. Grinding device ( 1 ; 35 ) according to one of claims 1 to 9, characterized in that the device ( 1 ; 35 ) comprises at least one further motor ( 5 ; 38 , 39 ). 11. Grinding device ( 1 ; 35 ) according to one of claims 1 to 10, characterized in that at least one motor ( 5 ; 38 , 39 ) is movable relative to the holding table ( 2 ; 37 ). 12. Grinding device ( 1 ; 35 ) according to one of claims 1 to 11, characterized in that a holding element ( 69 ) is arranged on the holding table ( 2 ; 37 ), which is rotatable in a holding table plane by preferably 180 °. 13. Grinding device ( 1 ; 35 ) according to claim 12, characterized in that the holding element ( 69 ) can be fed to the holding table ( 2 ; 37 ). 14. Grinding device ( 1 ; 35 ) according to one of claims 12 or 13, characterized in that the holding element ( 69 ) can be fed to the motors ( 5 ; 38 , 39 ). 15. Grinding device ( 1 ; 35 ) according to one of claims 1 to 14, characterized by a control panel which is arranged in the lateral region of the grinding device. 16. Grinding device ( 1 ; 35 ) according to one of claims 1 to 15, characterized by a protective hood, the pivot axis of which is arranged in the direction of the main displacement axis ( 24 ; 36 ) of the holding table ( 2 ; 37 ). 17. Grinding device ( 1 ; 35 ) according to one of claims 1 to 16, characterized by a microspray device ( 55 ) for grinding cooling. 18. Method for sharpening multi-bladed knives ( 17 ; 66 ), characterized in that the multi-bladed knife ( 17 ; 66 ) is sharpened simultaneously and symmetrically on two blades ( 19 , 20 ; 48 , 49 ).