Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
  • A01G23/00—Forestry
  • A01G23/02—Transplanting, uprooting, felling or delimbing trees
  • A01G23/08—Felling trees
  • A01G23/083—Feller-delimbers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
  • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
  • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
  • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
  • B27L1/04—Debarking or removing vestiges of branches from trees or logs; Machines therefor by rubbing the trunks in rotating drums
  • B27L1/045—Feeding devices therefor

Definitions

• the invention relates to a feed element for a transport surface of a feed device.
• Such advancing elements in the form of steel pins are used, for example, in harvesters, in particular harvesters or harvester harvesters.
• Woodworkers are special wood harvesting machines that perform semi-automatic precipitation, delimbing and cutting. These machines have a crane arm at the end of which a felling head is mounted.
• the felling head is usually equipped with feed rollers, a length measuring unit, a hydraulically driven chain saw and delimbing knives.
• feed rollers engage on both sides of the trunk of a tree to be felled, strained and limed.
• the transport surfaces of the feed rollers are conventionally occupied with steel pins, which press in on the outside into the wood.
• the steel pins are welded onto the transport surface. By turning the feed rollers, the sawed tree trunk is transported in its longitudinal direction.
• the steel pins act as feed elements, which ensure a defined feed and secure traction when moving the tree trunk.
• the feed rollers have the task of moving the tree trunk as far as possible so far that the chain saw attached to the felling head can saw off the trunk into sections of predefined length. This is essential for the transport, storage and further processing of the wood sections.
• feed rollers causes the steel pins to wear out so that slippage can lead to erroneous path measurements and thus incorrect lengths of the wood sections.
• the steel pins must therefore be replaced in good time to maintain the desired feed and Traktton. It is very time-consuming to remove the worn steel pins from the transport surface of the feed roller and to weld new steel pins.
• attention must be paid to orientation when welding. In the welding process itself, it is not easy to maintain the predefined orientation.
• stud bolts are known as wear protection of surfaces subject to heavy wear.
• a support member has a good weldable steel material.
• the support member is equipped with a receptacle which may be formed for example as a bore or a conical seat.
• a hard material element in this case a hard metal piece arranged. If a hole is made in the support part, a hard metal pin is used as the hard material that is soldered into this hole.
• the studded stud serves to protect the wear of surfaces subject to heavy wear.
• a plurality of stud bolts in a grid spaced from each other are welded onto the surface to be protected.
• the surface to be protected may be part of an earthworking tool.
• Erdmateria! passed over the surface and the stud bolts. Due to the grid structure soil settles in the spaces between the stud bolts, forming a kind of natural wear protection.
• the carrying part of the dimpled pin wears off during machining;
• the hard material element on the other hand, is only subject to less wear due to its material characteristics.
• the feed element should ensure a particularly good traction of the wood piece to be processed.
• the object of the invention is achieved by a feed element according to the Merkmaien of claim 1.
• the feed element on a support member which carries a hard material element in or on a receptacle, wherein the hard material element is indirectly or directly supported with a mounting portion on the support member.
• the hard material element is particularly wear-resistant and securely fixed in the supporting part.
• the support member in turn can be attached in a simple manner by a rapid stud welding process on the transport surface of the feed device. In addition, there is no clogging of the spaces between adjacent feed elements on the transport surface of the feed roller.
• the hard material element has at least one first inclination surface inclined in the direction of its upper end facing away from the attachment section at a first angle to the central longitudinal axis.
• the hard material elements may also have a second inclined surface extending in a direction inclined towards the upper end at a second angle to the central longitudinal axis, which forms a cutting edge with the first inclined surface at the upper end of the hard material element. With this Cutting edge, the penetration of the feed element is further simplified in the Hoizmaterial.
• a particularly sharp cutting edge results when the first inclination surface and the second inclination surface are formed on two opposite sides of the hard material element with respect to the cutting edge.
• Such a cutting edge can only be made of hard material in a particularly wear-resistant design.
• the receptacle for the hard material element in or on the support part is at least partially surrounded by a jacket part. At the Mantelteii the hard material element can be aligned correctly and reliably during assembly.
• the feed element is such that the mating surface of the support part is formed by a base part, which preferably has a cylindrical outer contour, and from which the mantle part rises, then a simple design is achieved, which can be easily manufactured.
• a particularly preferred variant of the invention is such that the support member indirectly or immediately after the mating surface has a preferably truncated conical tapered portion, which narrows the cross section of the support member in the direction of the lower end of the support member facing away from the hard material element.
• the shape with the cross-section tapered section is characterized by good weldability, as this optimizes the flow of current during the welding process.
• the tapering section has a contact element which serves for contacting during the welding operation. This contact element may be formed, for example, as an aluminum tip.
• the object of the invention is also achieved by a combination consisting of a feed element according to one of claims 1 to 7 and a weldable transport surface of a feed device for a workpiece, in particular workpiece consisting of wood or the like organic material.
• a feed element according to one of claims 1 to 7
• a weldable transport surface of a feed device for a workpiece in particular workpiece consisting of wood or the like organic material.
• an at least partially encircling, bead-shaped welding region is formed on the outside in the transition region between the base part and the jacket part.
• the bead-shaped welding region has a greater wear resistance than the supporting part, and thus protects the transition region of the supporting part to the workpiece and thus serves as leaching protection.
• the object of the invention is also achieved by a combination consisting of a feed element according to one of claims 1 to 7 and a ceramic ring having a cylindrical inner receptacle for the feed element.
• a welding tool which makes electrical contact with the supporting part can be attached very comfortably to the ceramic ring.
• the advancing element in the cylindrical inner receptacle of the ceramic ring is rotatable about its central longitudinal axis.
• the orientation of the advancing element can be established before welding.
• the ceramic ring has a lower support surface which is placed on a weldable transport surface of a feed device. With this arrangement, the feed element to be welded can be easily and securely positioned before welding.
• FIG. 1 shows in simplified side view and in full section a feed element surrounded by a ceramic ring, wherein the feed element is placed together with the ceramic ring on a transport surface of a feed roller;
• Figure 2 in a simplified side view and in full section the feed element according to the figure 1 welded onto the transport surface of the feed roller;
• FIG. 3 shows a perspective side view of the feed element according to FIG. 1;
• FIG. 4 is a perspective perspective view of the feed element according to FIG. 1 surrounded by the ceramic ring
• FIG. 5 shows a perspective bottom view of the feed element according to FIG. 1 surrounded by the ceramic ring
• FIG. 6 in simplified partial side view of a feed roller occupied with a Variety of feed elements.
• FIG. 1 shows a simplified side view and in full section a feed element 10 surrounded by a ceramic ring 44, wherein the feed element 10 is mounted together with the ceramic ring 44 on a transport surface 52 of a feed roller 50 of a Holzvoirectters.
• the advancing element 10 has a supporting part 12 and a hard material element 14.
• the support member 12 is made of a weldable material with good electrical conductivities. It has a base part 32, from which a ring-shaped circumferential jacket 30 rises.
• the jacket 30 encloses a cylindrical cavity 13.
• the jacket 30 On its outer contour, the jacket 30 has a first cylinder section 30a ascending from the base section 32, which continues in a second cylinder section 30b of smaller outer diameter than the first cylinder section 30b.
• the first Zyünderabites 30a passes in a stepped manner in the second Zyiinderabites 30b.
• the base part 32 forms, facing the cavity 13, a bottom-side Jacobfiä- surface 20 and has a cylindrical outer contour.
• a tapered section 34 of frustoconical shape is introduced, wherein the bore axis of this bore 37 is aligned with the central longitudinal axis ML of the feed element 10.
• a contact element 38 consisting of a good electrically capable material, for example aluminum, pressed.
• the support member 12 takes in the cavity 13, a hard material element 14, consisting for example of ceramic or hard metal, on.
• the hard material element 14 has a cylindrical attachment section 18 with a bottom-side support surface 16 on. In this case, the support surface 16 is aligned orthogonal to the central longitudinal axis ML of the hard material element 14.
• a solder is used to assemble the hard material element 14 in the cavity 13 of the support part 12. This is positioned in the transition region between the support surface 16 and the Gegenfikiee 20. About the solder joint, the hard material element 14 is firmly bonded to the Tragteii 12.
• only the first sloping surface 24 may be provided.
• the first inclined surface 24 is inclined at a first angle ⁇ to the center longitudinal axis ML, whereas the second inclined surface 26 is inclined at a second angle ⁇ to the central longitudinal axis ML.
• the first angle ⁇ is carried out in the range of 40 ° to 50 °, whereas the second angle ß 5 ° to 10 ° is made smaller than the first angle.
• the first inclination surface 24 and the second inclination surface 26 are formed on two opposite sides of the hard material element 14 with respect to the cutting edge 28.
• the cutting edge 28 formed between the two tilting surfaces 24 and 26 at the upper end 17 of the hard material element 14 is offset in the direction of the second inclined surface 26, so that the upper end 17 of the hard material element 14 is not mirror-symmetrical.
• this Hard material element 14 is not rotationally symmetrical to the central longitudinal axis ML constructed.
• FIG. 3 shows the feed element described with reference to FIG. 1 in a perspective side view.
• FIGS. 1, 4 and 5 the advancing element 10 is shown surrounded by a ceramic ring 44.
• FIG. 1 shows a simplified side view and a full section
• FIG. 4 shows a perspective view
• FIG. 5 shows a perspective view of this arrangement.
• the ceramic ring 44 shown in FIGS. 1, 4 and 5 which has a cylindrical inner receptacle 46 which receives the feed element 10.
• the feed element 10 is rotatable in the cylindrical inner receptacle 46 of the ceramic ring 44 about its central longitudinal axis ML and thus adjustable in its orientation with respect to the transport direction T of the feed roller 50.
• the ceramic ring 44 has a lower support surface 48, which can be placed on the transport surface 52 of a feed roller 50, for example, a Holzvoilernters.
• the transport surface 52 is to be provided with a plurality of feed elements 10.
• a feed roller 50 of a Holzvoirectters busy with a plurality of feed elements 10 is shown in FIG.
• the feed elements 10 are preferably arranged on the transport surface 52 in the pitch grid.
• the ceramic ring 44 is provided in the region of the support surface 48 with recesses which serve as gas outlets 49.
• a welding tool is attached to the ceramic ring 10, which contacts the Tragteii 12 electrically.
• a welding current is then introduced, which generates an arc between the contact element 38 and the transport surface 52.
• the feed roller 50 is melted in the region of the transport surface 52.
• the tapering portion 34 and the contact element 38 is melted. Subsequently, the feed element 10 sinks into the molten metal thus formed.
• a firm welded joint results in the transition region between the base part 32 and the transport surface 52 of the feed roller 50.
• the welding process is carried out in such a way that in the transitional area between the base part 32, the shell part 30 and the transport surface 52 of the feed roller 50 forms a circumferential, bead-shaped welding area 40.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Wood Science & Technology (AREA)
• Biodiversity & Conservation Biology (AREA)
• Ecology (AREA)
• Environmental Sciences (AREA)
• Mechanical Engineering (AREA)
• Rollers For Roller Conveyors For Transfer (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47633045

Family Applications (1)

Country Status (3)

Citations (6)

• 2012
  • 2012-02-07 DE DE201210100969 patent/DE102012100969A1/de not_active Withdrawn
• 2013
  • 2013-01-28 EP EP13702424.6A patent/EP2811820A1/fr not_active Withdrawn
  • 2013-01-28 WO PCT/EP2013/051582 patent/WO2013117452A1/fr not_active Ceased

Patent Citations (6)

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