WO2011023162A1

WO2011023162A1 - Device for automatically sharpening saw chains, method for sharpening saw chains

Info

Publication number: WO2011023162A1
Application number: PCT/DE2010/000959
Authority: WO
Inventors: Jürgen Sanwald
Original assignee: Sanwald Juergen
Priority date: 2009-08-26
Filing date: 2010-08-12
Publication date: 2011-03-03
Also published as: DE102010034197A1; DE112010003419A5

Abstract

The invention relates to a device (55) for automatically sharpening saw chains (1) and to a method for sharpening saw chains (1), wherein the saw chain (1) comprises cutting teeth and is optionally equipped with depth limiters, characterized in that the sharpening of the cutting teeth and/or the adjustment of the depth limiters (4) of the saw chain (1) is carried out fully automatically by means of at least one file.

Description

Apparatus for automatic sharpening of saw chains, method for sharpening saw chains

State of the art

The invention relates to a device for automatic sharpening of saw chains, according to the preamble of claim 1 and a method for sharpening saw chains, according to the preamble of claim 7.

Power saws are used in forestry, agriculture, the construction industry, rescue services, tree care and hobby and occasional users.

The functionality and performance of a chainsaw depends not only on its engine in their use. Only the cutting set, which consists in particular of a guide rail, a saw chain and a sprocket (eg star sprocket, ring sprocket), converts the engine power into cutting power. An incorrectly serviced saw chain (eg standard chain, safety chain) is usually the cause of damage to the guide rail and the sprocket. In addition, the chain cuts badly and is a potential security risk.

Since a saw chain (e.g., a gouging chain) is normally sharpened under normal load after two tank fillings, the chainsaw operator may need to perform this repair remotely from a field workshop or use a sharpened spare chain. The earlier the teeth of a saw chain (for example, round tooth, semi-chisel, full chisel) are sharpened, the less material must be removed during sharpening, which increases the life of a saw chain.

By today on the market systems, the sharpening of the saw chains by filing or grinding takes place. When filing the incisors, there are matched round files on the chain pitch (spacing of three consecutive rivets divided by two), the diameter of which projects from 1/10 to 1/5 above the tooth roof. Optimally, the file is always guided on thrust from the inside out, whereby a specified by the chain manufacturer Feilhalte- and sharpening angle should be adhered to, which is designed in a hands-free guidance as extremely difficult. To facilitate the guidance of the file therefore sharpening grille for the exact file guide angle and file holder on the market. The disadvantage, however, is that the files have to be done manually consuming time consuming.

To overcome this disadvantage, there are devices where sharpening is done by grinding. The disadvantage here is that, since the saw chains are usually contaminated with adhesive oil and thereby enforce the grinding wheels very quickly, making it to a Annealing the cutting tip of the cutting teeth comes. Due to the shape of the grinding wheel, achieving the optimal cutting geometry of the cutting teeth is almost impossible. In addition, the presence of the operator is required in these devices, since, for example, a turning of the saw chain must be done manually.

The invention and its advantages

The inventive apparatus for automatic sharpening of saw chains, with the characterizing features of claim 1, and the inventive method for sharpening saw chains, with the characterizing features of claim 7, have the advantage that the sharpening of the cutting teeth of the saw chain by means of at least one file he follows.

According to an advantageous embodiment of the device according to the invention, the file for filing the cutting teeth is a round file.

According to an additional advantageous embodiment of the device according to the invention, the processing unit has at least one file for adjusting (lowering) the depth limiter.

According to a related advantageous embodiment of the device according to the invention, the file for adjusting the depth limiter is a flat file.

According to an additional advantageous embodiment of the device according to the invention, at least one file is provided by a pneumatic matic cylinder or electrically driven, whereby the necessary for filing and / or adjusting stroke movement is performed. With electric drive, this can be operated via the power grid or, for example, via the cigarette lighter of a vehicle.

According to an additional advantageous embodiment of the device according to the invention, the placement unit has at least one saw chain holder (preferably 30).

According to an advantageous embodiment of the method according to the invention, in which the saw chain to be sharpened (eg saw chain with cutting teeth, saw chain with cutting teeth and depth limiter) is placed in a loading unit to be subsequently transported to a processing unit and clamped in this, so that sharpening all Cutting teeth is feasible at least one file, the depth limiter are processed by means of at least one file.

According to an additional advantageous embodiment of the method according to the invention at least one file is driven by a pneumatic cylinder or electrically during the filing process.

According to an additional advantageous embodiment of the method according to the invention, the sharpened saw chain is removed after the sharpening process from the processing unit and transported to a storage unit (chain memory). According to an additional advantageous embodiment of the inventive method, at least two saw chains to be sharpened are inserted into the assembly unit.

According to a related advantageous embodiment of the method according to the invention, the inserted into the assembly unit sharpened saw chains are sharpened one after the other.

According to an additional advantageous embodiment of the method according to the invention, the saw chain to be sharpened is marked prior to insertion into the assembly unit.

According to a related advantageous embodiment of the method according to the invention, the marking is a color marking.

According to an additional advantageous embodiment of the method according to the invention, the marking can be read by at least one sensor.

According to an additional advantageous embodiment of the method according to the invention, it is fully automatic after inserting the saw chains to be sharpened.

According to an additional advantageous embodiment of the method according to the invention, a device for sharpening saw chains, in particular a device for automatic sharpening of saw chains according to one of claims 1 to 6, is used. Further advantages and advantageous embodiments of the invention are the following description, the drawings and claims removed.

drawing

An embodiment of the object of the invention is illustrated in the drawing and will be explained in more detail below. Show it:

1 is a perspective detail view of a saw chain,

2 is a perspective detail view of a saw chain,

3 is a perspective detail view of a device according to the invention,

4 is a perspective detail view of a placement unit,

5 is a perspective detail view of a feeder ,,

Fig. 6 integrated in the device according to the invention

feed

7 shows a detailed view of the device according to the invention,

8 is a detail view of a clamping unit, Fig. 9 integrated in the device according to the invention

Clamping unit,

10 is a perspective detail view of a processing unit,

11 is a perspective detail view of a processing unit,

Fig. 12 is an integrated into the device according to the invention

Processing unit,

13 is a perspective detail view of a chain memory,

Fig. 14 integrated in the device according to the invention

Chain store and

15 shows a device according to the invention.

Description of the embodiment

FIG. 1 shows a perspective detail view of a saw chain 1 (eg a hob tooth chain). The saw chain 1 consists of a plurality of cutting teeth (right cutting tooth 2, left cutting tooth 3) and depth limiter 4-bearing members, drive links 5 and connecting members 6, which are connected to each other via rivets 7. According to the saw chain 1 is to be sharpened by filing as in the manual processing by means of a file 8. Fig. 2 shows a further perspective detail view of a saw chain 1. Both the left and the right cutting tooth 2 shown here have to be sharpened surface 9, which ends at the tooth roof in a cutting edge IO.

3 shows a perspective detail view of a device according to the invention. In particular, here is the placement unit 11, which preferably as a magazine for several resharpening saw chains

I configured, and the feeder 12 can be seen.

4 is a perspective detail view of a placement unit

I 1 shown. For equipping the placement unit 11, the saw chains 1 are placed on a saw chain holder 13 (by way of example, eight saw chain holders 13 are shown in FIG. 4), and then preferably by means of a pneumatic cylinder in the transport direction 14 to a scraper 15 on which the saw chain 1 from the saw chain holder 13 is stripped to be transported.

5 shows a perspective detail view of a feed 12. The feed 12 consists of a holding cylinder 16, holding disks 17 and a transport cylinder 18. Before the saw chain located in the placement unit is stripped by the scraper from the saw chain holder, the feed 12 moves over the saw chain and closes in the clamping direction 19, the holding disks 17, so that the abgestriffene saw chain falls into the closed holding disks 17, to be subsequently transported by the transport cylinder 18 in the transport direction 20. Arrived in the front position, the retaining washers 17 against the Klemmrich- tion 19 by extending the holding cylinder 16 so that the saw chain can fall down.

FIG. 6 shows a feed 12 integrated in the device according to the invention.

Fig. 7 shows a detailed view of the device according to the invention. After the saw chain, as described in Fig. 5, falls down the saw chain is collected by a take-up shaft 21 (collecting bolts) between a arranged on a motor 22 pinch roller 23 and a fixed pinch roller 24. About pneumatic cylinder 25, the saw chain is clamped laterally between the pinch rollers 23 and 24 in the clamping direction 25 and brought to a defined diameter. A pneumatic cylinder 27 closes a guide rail half 28 to drive link strength +0.1 mm. The movable and spring-mounted guide rail half 28 is pressed together so far that even optimally air is present up to the block. The sensor 30 is now damped, stops the cylinder 27 and locks the rail with clamping unit 32. The saw chain is now guided in the rail and can still be transported. A chain ramp 29, the tread of the saw chain is brought to rail top. With a sensor 30, a defined clearance between the guide rail 28 and a fixed guide rail 31 and the saw chain is detected and held by clamping a clamping unit 32, so that in the saw chain is gripped by a clamping unit 34 shown in detail in Fig. 8.

The clamping unit 34 shown in FIG. 8 consists of a clamping tongs 35, which is actuated via a cylinder 36, and a cylinder. the 37, which serves for tensioning and swinging. With the open clamping tongs 35, the saw chain is gripped by the cylinder 36 (pneumatic cylinder) at a position 33 (FIG. 7) in order to tension the saw chain by releasing the cylinder 37 (pneumatic cylinder).

9 shows a clamping unit 34 integrated in the device according to the invention.

After the saw chain is stretched, it is processed in a processing unit.

FIGS. 10 and 11 show a perspective detail view of a processing unit 38. By actuating the pneumatic cylinder 39, the entire processing unit 38 advances onto the saw chain 1 and is adjusted to the height of the new saw chain 1. With the clamp 40 this set height is fixed. The saw chain 1 is driven via the drive unit (motor 22 in Fig. 7). A color sensor (sensor 30 in FIG. 7) recognizes the length of the saw chain 1 by means of a color point on the saw chain 1. When passing through the saw chain 1, a sensor package 41 (sensor package Bearing fixed (inductive sensors and light barriers)) detects the first left cutting tooth the saw chain 1. This position is held by the drive motor. A pneumatic cylinder moves the shuttle 42 (shuttle loose) in a direction 43 (direction for pitch adjustment) until a sensor pack 44 (sensor pack shuttle loose (inductive sensors and photoelectric sensors) detects the first right cutting tooth.) In this position, the shuttle 42 is actuated by the pneumatic cylinder 45 (Pneumatic cylinder clamp for pitch adjustment) clamped when driving through the saw chain 1 the left and right cutting teeth are detected by the sensor packages 41 and 44 and filed with the respective files 8 of the Feilböcke 42 and 46 (Feilbock fixed). The files are driven 8 of the Feilböcke 42 and 46, which move in the direction of filing 47 (lifting movement Bearing loose) and 48 (stroke movement Bearing fixed), by pneumatic cylinder 49 (pneumatic cylinder Feilbock loose) and 50 (pneumatic cylinder Feilbock fixed).

Through a spiral groove in the guide spindle, the file receives a twist during the feed, which corresponds to the spiraling of the file cut. If the file is dull, it can be rotated twice by 120 °.

Preferably, the saw chain 1 passes once empty, whereby the saw chain 1 finds its position on the drive wheel. The color sensor detects the applied splash of color and the combination of inductive sensor and two forked light barriers detects whether a cutting tooth comes, its position and whether it is a left or right cutting tooth. The controller can thus determine the number of teeth during circulation of the saw chain 1. The entire processing unit 38 advances to bring the files 8 in the correct height with respect to the tooth roof of the saw chain 1. A feeler that detects the height of three consecutive cutting teeth dampens an inductive sensor. The clamping is triggered and the trailing processing unit 38 runs on. By the sensors of the movable Feilbocks 49 a suitable cutting tooth is detected. The file blocks 49 and 50 now have the appropriate pitch for chain pitch. A cylinder driving in a wedge-shaped profile corrects for the exact pitch and locks the file block 49. After the files 8 of the file blocks 49 and 50 again drove in the rest position, the saw chain 1 clocks to a cutting tooth on. The sensors check again whether the distance of the Feilböcke 49 and 50 fits the chain pitch. The filing process can begin, preferably always two cutting teeth are processed simultaneously. The file blocks 49 and 50, which have detected a suitable cutting tooth, move into working position. The drive motor (motor 22 in Fig. 7) of the saw chain 1 generates the necessary contact pressure during filing and takes it away in the return stroke. This prevents the file from being pulled over the material in the opposite direction to its direction of rotation and thus dull. A running flat file, not shown, resets the depth limiters if required. By electrical potential difference between file 8 and saw chain 1, the controller recognizes whether each cutting tooth was in contact with the file 8 during the run.

To prevent fouling of the sensors by filing flour, preferably the electrostatically charged Filing chips are attracted by magnetism.

After the saw chain 1 is sharpened on the entire circumference, the processing unit 38 moves back, drive wheels and guide rail open and the saw chain 1 depends only on the clamping unit, the sharpened saw chain 1 from the device to a chain memory shown in Fig. 13, transported.

FIG. 12 shows a processing unit 38 integrated in the device according to the invention. Fig. 13 shows a perspective detail view of a chain memory 51. The pneumatic cylinders 26 and 27 shown in Fig. 7 are operated, whereby the guide rail and the pinch roller are opened. The saw chain can now be pivoted with the clamping unit 34 shown in Fig. 8 from the processing space and brought to the chain memory 51. The chain memory 51 has a receiving bolt 52, which is advanced for transfer with a pneumatic cylinder 53 below the pivoting position into the saw chain. By opening the clamping tongs 35 shown in FIG. 8, the saw chain drops onto the locating pin 52 of the chain store 51, which is preferably a backwardly inclined round material on which the saw chains slip and collect at the end. With the pneumatic cylinder 53, the receiving bolt 52 is moved in the direction 54 to the rear.

14 shows a chain memory 51 integrated in the device according to the invention.

15 shows a device 55 according to the invention for sharpening saw chains 1 with their preferred main components (placement unit 11, feed 12, tensioning unit 34, processing unit 38, chain memory 51).

In summary, it can be said that the device according to the invention, which represents a fully automatic Sägekettenschärfgerät according to the filing principle, automatically adjusts to the respective saw chain type and allows the automatic sawing the continuous sharpening of the predetermined saw chains. In doing so, the right and left cutting teeth, which are not always attached one behind the other and usually change, become open the saw chain automatically detected and edited by filing so that the cutting teeth are gently sharpened and the metal can not anneal during the sharpening process and thus loses stability. The file type according to the chain manufacturers (eg Fa. KOX, Fa. Stihl) is chosen so that the original tooth geometry is present after each filing process. With the filing process, saw chains can be sharpened so that the original cutting quality is achieved.

Preferably, the saw chains are sorted by the machine operator according to the required file diameter, then the appropriate files are inserted into the changeover holder so that the color codes match. Through a sensor, the controller detects which changeover holder is in use and provides the associated holding current for the drive motor. A right planer tooth is marked by means of a splash of color, so that the chain gets beginning and end.

In addition, the depth limiters are reset in the same filing operation with a flat file, wherein the Rücksprungsmaß the depth limiter is manually adjustable, so that the cutting quality can be adapted to the particular work, since, for example. for a performance cut in soft pulpwood (spruce, fir, alder, pine, etc.), the size of the recess should be greater than for a precision cut of the carpenters or when working hardwood.

The device according to the invention (automatic sharpening machine) detects the number of cutting teeth and can distinguish these into left and right cutting teeth and file them to the same length. The file blocks are automatically adjusted to the pitch and height of the cutting teeth.

The device according to the invention, which is also suitable for sawing chains of harvesting machines, is equipped with a chain store and an automatic insertion and removal, so that the wage sharpener during the sharpening process, e.g. Sales or counseling talks can lead, since his presence during the sharpening process is not mandatory.

All features shown here may be essential to the invention both individually and in any combination.

LIST OF REFERENCE NUMBERS

1 saw chain

2 Right cutting tooth

3 left cutting tooth

4 depth limiters

5 driving link

6 connecting link

7 rivet

8 file

9 Area to be sharpened

10 cutting edge

1 1 placement unit

12 feeder

13 saw chain holder

14 transport direction

15 He strips off

16 holding cylinders

17 retaining washers

18 Tran sporty linder

19 clamping direction

20 transportation direction

21 recording wave

22 engine

23 pinch roller

24 pinch roller

25 clamping direction

26 pneumatic cylinders

27 pneumatic cylinders guide rail

chain ramp

sensor

guide rail

terminal unit

position

clamping unit

locking pliers

cylinder

processing unit

pneumatic cylinder

clamping

sensor package

Feil Bock

direction

sensor package

pneumatic cylinder

Feil Bock

Feil direction

pneumatic cylinder

Chains memory

locating pin

pneumatic cylinder

direction

contraption

Claims

claims

1. Device (55) for automatic sharpening of saw chains

- With a loading unit (11) for inserting at least one saw chain (1), the cutting teeth and / or cutting teeth and Tiefenbegrenzer (4), and

with a processing unit (38),

characterized,

in that the processing unit (38) has at least one file (8) for filing the cutting teeth.

2. Device (55) according to claim 1, characterized in that the file (8) for filing the cutting teeth is a round file.

3. Device (55) according to claim 1 or claim 2, characterized in that the processing unit (38) has at least one file for processing the depth limiter (4).

4. Device (55) according to claim 3, characterized in that the file for processing the depth limiter (4) is a flat file.

5. Device (55), according to one of the preceding claims, characterized in that at least one file by a pneumatic cylinder or is electrically driven.

6. Device (55), according to one of the preceding claims, characterized in that the loading unit (11) has at least one saw chain holder (13).

7. A method for sharpening saw chains (1), the cutting teeth and / or cutting teeth and Tiefenbegrenzer (4), characterized

in that the saw chain (1) to be sharpened is inserted into a loading unit (11) in order subsequently to be conveyed to and clamped in a processing unit (38), so that sharpening of all cutting teeth by means of at least one file can be carried out.

8. The method according to claim 7, characterized in that the depth limiter (4) are processed by means of at least one file.

9. The method according to claim 7 or claim 8, characterized in that during the filing process at least one file is driven by a pneumatic cylinder or electrically.

10. The method according to any one of claims 7 to 9, characterized in that the sharpened saw chain (1) is removed after the sharpening process from the processing unit (38) and transported to a storage unit.

11. The method according to any one of claims 7 to 10, characterized in that in the equipping unit (11) at least two saw chains to be sharpened (1) are inserted.

12. The method according to claim 11, characterized in that in the assembly unit (11) inserted to be sharpened saw chains (1) are sharpened one after the other.

13. The method according to any one of claims 7 to 12, characterized in that a sawing chain to be sharpened (1) before insertion into the assembly unit (11) is marked.

14. The method according to claim 13, characterized in that the marking is a color marking.

15. The method according to claim 13 or claim 14, characterized in that the marking is readable by at least one sensor.

16. The method according to any one of claims 7 to 15, characterized in that it is fully automatic after inserting the sawing chains (1) to be sharpened.

17. The method according to any one of claims 7 to 16, characterized in that a device for sharpening saw chains (1), in particular a device for automatic sharpening of saw chains (1) according to one of claims 1 to 6, is used.