Tools for soil cultivation

Abstract

A tool, in particular for soil cultivation, especially an agricultural soil cultivation tool or a construction soil cultivation tool, with a cast base body made of a steel or cast iron material and having a support section (17), wherein one or more wear-protection elements (20, 50.1, 50.2), consisting of hard metal, are supported on the support section (17) by means of a fastening section (24) and are cast to the support section (17), wherein the at least one wear-protection element (20, 50.1, 50.2) is enclosed at least partially on opposite sides by means of side frames (17.1, 17.2, 17.3; 19.2, 19.4) of the cast base body, characterized in that at least one of the side frames (17.1, 17.2, 17.3; 19.2, 19.4) is a recess (18) is / are interrupted, and that the recess (18) extends to a body boundary of the wear protection element (20, 50.1, 50.2) is led.

Description

[0001] The invention relates to a tool, in particular for soil cultivation, especially an agricultural soil cultivation tool or construction soil cultivation tool, with a cast base body made of a steel or cast iron material and having a support section, wherein one or more wear protection elements, consisting of hard metal, in particular consisting of tungsten carbide, are supported on the support section by means of a fastening section and are cast to the support section, wherein the at least one wear protection element is enclosed at least partially on opposite sides by means of side flanges of the cast base body.

[0002] In the context of the invention, a casting-technical connection can be understood as a connection in which the materials of the casting material and the hard metal of the at least one wear protection element are fused together, i.e., materially bonded.

[0003] The wear protection element(s) according to the invention can preferably be designed as sintered tungsten carbide molded parts. They can, in particular, have a cutting edge and / or a flat or curved molded surface to form a discharge surface over which machined wear material, especially soil material, can be discharged.

[0004] US 2,743,495 discloses a drill bit with a cast body that carries carbide inserts at its longitudinal end. These inserts are embedded in the cast material and protrude from the cast body by means of cutting tips. A mold is used to manufacture the drill bit. Nickel sheets are used to fix the carbide inserts in the mold. These sheets melt during the casting process and form a nickel-rich layer in the cast material around the carbide inserts. When the sheets melt, an uncontrolled state results, in which the carbide inserts can shift. Furthermore, the nickel-rich layer leads to inhomogeneity in the material, which can result in a loss of strength. In addition, the nickel sheets cause considerable extra costs.

[0005] The object of the invention is to provide a tool of the type mentioned above that can be easily manufactured using casting techniques with minimal effort.

[0006] It is also an object of the invention to provide a method for manufacturing such a tool.

[0007] The problem relating to the tool is solved by the fact that at least one of the side edges, preferably both side edges, is / are interrupted by means of a recess and that the recess extends to a body boundary of the wear protection element.

[0008] The portion of the mold used to manufacture the tool according to the invention, which forms the recess in the finished tool, extends with a mold element to the wear protection element inserted into the mold and secures it. Thus, the wear protection element is held securely to the mold element during the casting process. Following the mold element, the casting material fills the mold. In this process, the side frame forms alongside the mold element. As the melt begins to solidify, the side frame stabilizes the wear protection element. This ensures a precise fit for the tool. Virtually no additional effort is required for the formation of the mold element. Furthermore, it has been shown that the transition area between the wear protection element and the casting results in a material-bonded connection produced by the casting process, which is sufficiently stable and resilient.

[0009] According to a preferred embodiment of the invention, the recess may either extend through the side frame or be cut out of the side frame. The recess can thus be optimized for the tool design. In particular, the recess can then also form an area that accommodates the shrinkage of the casting material during solidification of the melt without causing impermissible stresses on the wear-protection elements. This is achieved particularly by a recess designed as a through-hole.

[0010] A particularly secure positioning of the wear protection element is achieved if it is provided that the at least one wear protection element has two body edges on opposite sides, which form body boundaries of the wear protection element, and that recesses are provided in the side frames in the area of ​​both body edges, preferably being opposite each other.

[0011] It is also possible that the body edges run parallel to each other, and that preferably the recesses are opposite each other on a line running perpendicular to the body edges.

[0012] One conceivable embodiment of the invention is such that the at least one wear-protection element has a fastening piece whose rear fastening section is cast to the support section, that a cutting element with an edge is directly or indirectly molded onto the fastening section, and that preferably the cutting element is cast to and supported by the support section. By supporting and connecting the cutting element to the support section, a highly resilient cutting edge geometry is created.

[0013] Additionally, a free discharge surface may be provided on the upper surface of the wear protection element opposite the mounting section, adjacent to the cutting edge. This discharge surface is preferably flat and extends further preferably to the side flange opposite the cutting edge. A guide surface of the cast base body is further preferably provided adjacent to this side flange. The material removed by the cutting edge can be discharged via the discharge surface. This protects the highly stressed area of ​​the cast base body adjacent to the cutting edge from wear. The discharge surface is preferably formed opposite the mounting section. If a guide surface of the cast base body adjoins the side flange, the removed material can then be guided and discharged to the wear protection element.

[0014] One possible embodiment of the invention is such that the cutting edge is at least partially covered by a side rim of the cast base body. The side rim protects the cutting edge before it is used; during tool operation, this side rim wears down continuously, exposing the cutting edge.

[0015] One possible embodiment of the invention is such that two or more, preferably identical, wear protection elements have abutting sides on which they are joined, preferably without gaps or with a gap of less than 12 mm, preferably less than 8 mm, and particularly preferably less than 5 mm, wherein the abutting sides extend transversely to the at least one side frame, and wherein the recess of the at least one side frame is spaced apart from the opposing abutting sides of the two wear protection elements. The abutting and thus segmented wear protection elements reduce the risk of breakage for these components both during manufacturing and during subsequent tool use. Because the recess is spaced apart from the impact area of ​​two wear protection elements, the side frame covers the impact area and thus protects it from the abrasive attack of the worn material.If the wear protection elements are spaced less than 12 mm apart, they can also be held laterally with cast material. A spacing of less than 8 mm still provides good protection against erosion caused by wear during tool use. A spacing of less than 5 mm offers good protection against erosion when fine-grained wear material is passed over the wear protection elements.

[0016] One embodiment of the invention comprises two or more wear-protection elements, preferably identical wear-protection elements, arranged in a row to form a series, with a further wear-protection element arranged at one or both longitudinal ends of the series. This further wear-protection element has a design that differs from that of the wear-protection element adjoining the further wear-protection element. Preferably, the further wear-protection element has a side cutting edge extending transversely to the longitudinal extent of the series and a cutting edge extending in the direction of the longitudinal extent of the series. The use of identical parts reduces the number of components. The further wear-protection element can perform an additional function, for example, a clearance cutting function with its side cutting edge.

[0017] A further reduction in the number of parts can be achieved if the two additional wear protection elements at both ends of the row of wear protection elements are designed to be identical.

[0018] If it is provided that at least one wear protection element has a recess that transitions into the recess of the side edging, then the wear protection element can be securely fixed in a form-fitting manner with a mold element that engages in the recess, whereby the mold element then simultaneously creates the space for the recess on the finished tool.

[0019] One possible embodiment of the invention is such that the recess, or at least a part of the recess, is covered or at least partially filled by an additional material that differs from the material of the cast base body. In this case, the recess with the filling material can, for example, be assigned an additional benefit. In the simplest case, the additional material forms a visually appealing finish.

[0020] According to the invention, the casting material may be a GJS-600-3 steel.

[0021] Preferably, a diffusion layer containing cobalt and iron is formed between the cast material and the wear protection element. This diffusion layer bonds the wear protection elements to the cast base. A gradient of iron and cobalt may form from the cast material to the hard metal, extending to the end of the diffusion layer.

[0022] It is conceivable that the thickness of the diffusion layer is preferably less than 200 µm, preferably in the range between 50 and 200 µm.

[0023] The object of the invention relating to the method is solved by inserting one or more wear protection elements, consisting of hard metal, in particular consisting of tungsten carbide, into a molded part and / or a counter-molded part, wherein a mold with a cavity is formed with the molded part and the at least one counter-molded part, an induction heater with at least one induction coil is placed around the outer wall of the mold facing away from the cavity, which is arranged in such a way that it inductively couples with the wear protection element(s) arranged in the cavity in order to inductively heat it, and then molten iron or molten steel is poured into the cavity via a sprue.

[0024] The induction coil inductively heats the wear protection element(s) to a temperature that prevents them from being damaged by thermal shock during the pouring of the molten steel or cast iron. Because the induction coil is located on the outside of the mold, it can be reused, making manufacturing significantly more efficient compared to the prior art.

[0025] To reduce cycle times, the at least one wear protection element can be inductively heated on at least two offset sides by means of the induction coil(s). This also results in more uniform heating.

[0026] Damage from thermal shock during casting is reliably prevented if at least one wear-protection element is inductively heated to at least 700 °C, preferably at least 900 °C, before the molten iron or steel is poured into the cavity. Furthermore, a strong bond reliably forms between the joining partners, and a diffusion layer may develop in the bonding zone.

[0027] According to an inventive design, a reliable fixation of the wear protection element is achieved when it is provided that it is placed on a support surface of the molded part or the counter-molded part and is positioned laterally against at least one molded element projecting beyond the support surface, preferably between two molded elements on the support surface that abut opposite sides of the wear protection element.

[0028] The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawings. The drawings show: Fig. 1 a flock of wings in perspective view, Fig. 2 in schematic representation a wear protection element Fig. 3 in schematic representation another wear protection element, Fig. 4 a mold part of a casting mold in perspective view, Fig. 5 and Fig. 6 a wear protection element in different views, Fig. 7 and Fig. 8 a schematic detailed representation of one of the Fig. 4 details taken from the list, Fig. 9 a mold in exploded view with the in Fig. 4. Molded part shown, without sprue and riser, Fig. 10 the mold according to Fig. 9 in the closed state and Fig. 11 a tool which, with the aid of the mold, according to the Fig. 9 and Fig. 10 is produced in perspective view.

[0029] Fig. Figure 1 shows a tool 10 according to the invention, which is designed in the form of a wing share. However, the following descriptions should not be understood as being limited to a wing share. Rather, the following descriptions also apply to other tools, for example a cultivator share, a wing share, a plow share, a breaker, a sieve or a counter blade, in particular for a combine harvester or forage harvester.

[0030] How Fig. As shown in Figure 1, the tool 10 has a fastening section 11. The fastening section 11 can have one or more fastening receptacles 11.1. For example, the at least one fastening receptacle 11.1 can be designed as a through-hole formed in the fastening section 11. Preferably, the fastening receptacle 11.1 has a recess 11.2. The head of a fastening element, for example a fastening screw, can be received in the recess 11.2, with the shank of the fastening element passing through the fastening receptacle 11.1.

[0031] The tool 10 has a mounting side 12 on the mounting section 11. The mounting side 12 is oriented towards the rear, i.e. opposite to the tool feed direction V.

[0032] How Fig. As further illustrated in Figure 1, the fastening section 11 can transition into the main body of the tool 10 by means of a transition section 13. Preferably, a continuous transition is created in the area of ​​a front guide surface 14 of the main body to the fastening section 11. This continuous transition can be formed by a transition section 13 that seamlessly transitions the front guide surface 14 into the front of the fastening section 11.

[0033] In a tool 10 according to the invention, the main body of the tool 10 may have shear wings 16 on opposite sides of the main body, transverse to the tool feed direction V, which are integrally formed. For example, the shear wings 16 can transition into the main body or into the front guide surface 14 of the main body by means of rounded transitions 15, which in this case may be concave. However, a convex transition is also conceivable.

[0034] The share wings 16 can, for example, have support sections 17. The support sections 17 are arranged at the front of the share wings 16 in the tool feed direction V.

[0035] The support sections 17 are covered with one or more wear protection elements 50.1 and 50.2. Preferably, several wear protection elements 50.1 and 50.2 are attached side by side in a row on the support section 17. All or some of the wear protection elements 50.1, 50.2 can be arranged next to each other without gaps or with gaps between them.

[0036] The wear protection elements 50.1 and 50.2 form a row. Wear protection elements 50.2 can be arranged at one or both longitudinal ends of this row, the design of which may differ from that of the adjacent wear protection element 50.1.

[0037] Preferably, the wear protection elements 50.2 at the opposite ends of the row are identical in design, so that identical parts can be used.

[0038] How Fig. Figure 1 shows that the wear protection elements 50.2 at the opposite ends of the row are identical in construction, but are mounted rotated 180° relative to each other.

[0039] Preferably, the wear protection elements 50.1 and / or 50.2 are designed as plate-shaped elements with a constant material thickness.

[0040] The wear protection elements 50.1, 50.2 are arranged in the present case with their adjacent side surfaces 53, as shown. Fig. Figure 1 shows that, in the tool feed direction V at the front, the wear protection elements 50.1 and / or 50.2 form cutting edges 51. It is possible that all or part of the wear protection elements 50.1, 50.2 form a continuous cutting edge, as shown in Figure 1. Fig. 1 shows.

[0041] The wear-protection elements 50.1 and / or 50.2 can be bounded opposite the cutting edge 51 by a body edge that forms a contact edge 52. It is conceivable that the body edge forming the cutting edge 51 runs parallel to the contact edge 52, as shown. Fig. 1 shows.

[0042] At least part of the wear protection elements 50.1, 50.2 is attached to side flanges 17.1, 17.2 on opposite sides. The side flanges 17.1, 17.2, 17.3 are formed in one piece with the share wing 16, which is designed as a cast body.

[0043] At least one of the side frames 17.1, 17.2, 17.3, preferably two side frames 17.1, 17.2 or all side frames, are equipped with recesses 18. The recesses 18 adjoin at least one body edge of the wear-protection element 50.1, 50.2. Preferably, the recesses 18 adjoin the cutting edge 51 and / or the opposite contact edge 52. Preferably, the recesses 18 are arranged opposite each other on a virtual line that runs perpendicular to the cutting edge 51 and / or the contact edge 52, as shown. Fig. 1 shows.

[0044] The tool 10 can be designed such that the wear protection element 50.2, which is arranged at the free end of the share wing 16, has a shape that corresponds to the Fig. 5 and Fig. 6 is trained.

[0045] As the Fig. 5 and Fig. As shown in Figure 6, a wear protection element 50.2 according to the invention can be designed such that it is plate-shaped, preferably with a uniform thickness. The wear protection element can have a lateral recess 54, which is advantageously recessed from the contact edge 52.

[0046] It is conceivable that the wear-protection element 50.2 has, in addition to the cutting edge 51, a side cutting edge 55 which can run at an angle to the cutting edge 51. Preferably, an obtuse angle is included between the cutting edge 51 and the side cutting edge 55.

[0047] A wear protection element 50.2 according to the invention can have a side surface 53 with which it can be aligned with an adjacent wear protection element 50.1.

[0048] Fig. Figure 1 illustrates that a wear protection element 20 according to the invention can have a cutting edge 22 that is forward in the tool feed direction V.

[0049] In contrast to the tool research direction V behind the cutting edge 22, a fastening element 21 can, for example, be integrally formed. It is conceivable that the fastening element 21 has an underside fastening section 24 by means of which it is materially connected to a cutting element carrier 19, which can be arranged between the two share wings 16.

[0050] The cutting element carrier 19 can, for example, have a support section 19.1 that supports the cutting edge 22 and / or the fastening section 24 on its underside, as Fig. 1 shows.

[0051] Additionally or alternatively, the cutting element 20 may also be bounded on its opposite sides by body edges that run transversely to the longitudinal extent of the cutting edge 22. At least one of these body edges may abut, at least partially, a side flange 19.2 of the cutting element carrier 19. One or both of the side flanges 19.2 may be provided with at least one recess 18, wherein the recess 18 may directly adjoin the body edge of the wear-protection element 50.2.

[0052] The upper surface of the wear protection element 20 can, for example, form an upper discharge surface following the cutting edge 22, over which material removed during tool operation can flow away. Preferably, the discharge surface transitions into a guide surface 19.3 of the cutting element carrier 19 on the rear side, i.e., opposite to the tool feed direction V. Preferably, this transition is flush. It is also conceivable that the cutting element carrier 19 forms a rear side frame 19.4 that supports the wear protection element 20 on its rear side opposite the cutting edge 22.

[0053] In Fig. Figure 2 shows a possible cross-sectional embodiment of the wear protection element 20. As this illustration shows, the wear protection element 20 may have a thickening 23. The thickening 23 may, for example, at least partially form the cutting edge 22. It is conceivable that the thickening 23 forms a transition between the area of ​​the wear protection element 20 that forms the cutting edge 22 and the area that forms the fastening section 24.

[0054] It is also conceivable that the wear protection element 20 is designed as a plate with a preferably constant thickness.

[0055] Fig. Figure 3 shows another embodiment of a possible wear protection element 20. As this illustration shows, the fastening piece 21 may have a lower fastening section 24. The fastening piece 21 can be leg-shaped with varying or constant thickness. Fig. Figure 3 shows a constant leg thickness.

[0056] It is possible that a thickening 23 adjoins the end of the fastening piece 21, forming the cutting edge 22. In particular, this may result in an L-shape in cross-section, as shown. Fig. 3 shows.

[0057] For the production of the tool 10, a casting mold with a mold part 40 is used, which is in Fig. Figure 4 shows this in more detail. As this illustration demonstrates, the molded part 40 has a recessed mold recess 41. A main recess area 41.2 is formed in the mold recess 41, followed by a second recess area 41.1 and wing-shaped areas 41.3. The first recess area 41.1 is intended to form the fastening section 11. The wing-shaped areas 41.3 are intended to form the share wings 16. The main recess area 41.2 is intended to form the base area of ​​the tool 10 formed between the share wings 16.

[0058] Fig. Figure 4 illustrates that in the wing shape areas 41.3, recesses 41.4 and 41.5 are provided, to which a support surface 41.6 adjoins. The wear protection elements 50.1 and 50.2 can be placed on the support surface 41.6 and arranged in a row, as shown. Fig. 4 shows.

[0059] To fix the wear protection elements 50.1, 50.2, shaped elements 41.7 are provided on opposite sides, preferably of each wear protection element 50.1, 50.2. The shaped elements 41.7 project beyond the support surface 41.6 such that the body edges of the wear protection elements 50.1 and / or 50.2 abut them. This is shown in the Fig. 7 and Fig. Figure 8 illustrates this.

[0060] As these illustrations show, it is possible that on a (see Fig. 7) or on 2 sides of a wear protection element 50.1, 50.2, 20, form elements 41.7 are provided, against which the wear protection element 50.1, 50.2 and / or 20 rests.

[0061] The form elements 41.7 hold the wear protection elements 50.1, 50.2 and / or 20 in position in the casting mold.

[0062] Fig. Figure 4 illustrates that the wear protection element 20 is fixed in the front of the mold, namely in the mold part 40, in essentially the same way.

[0063] After the wear protection elements 50.1, 50.2 and 20 have been inserted into the mold part 40, the mold is closed by means of a counter-mold part 60, such that a cavity is formed between the counter-mold part 60 and the mold part 40, which forms the negative shape of the tool to be manufactured.

[0064] How Fig. As illustrated in Figure 10, after the mold has been closed, an induction heater 70 is placed externally over the mold. The induction heater 70 has two electrical connections 71, which transition into inner legs 72 and outer legs 74. The outer legs 74 are arranged at an angle to each other in a V-shape. Similarly, the inner legs 72 are arranged in a V-shape to each other. A transition section 73 is provided for transferring the current flow from the inner legs 72 to the outer legs 74. The inner legs 72 and the outer legs 74 form one or more induction coils.

[0065] How Fig. Figure 10 shows that the induction heater 70 is arranged such that the induction coils run along the inner and outer legs 72 and 74 at a short distance from the top and bottom of the mold.

[0066] The outer legs 74 run longitudinally along the support sections 17 of the molded part 40. The inner legs 72 run on the opposite rear side of the wear protection elements 50.1, 50.2, 20.

[0067] The mold is designed such that one or more induction coils inductively couple to the hard metal of the wear protection elements 50.1, 50.2 and / or 20 in order to heat it. Since the mold is not made of a material that couples inductively, it remains essentially cold during the inductive heating of the wear protection elements 50.1, 50.2 and / or 20.

[0068] When the wear protection elements 50.1, 50.2 and / or 20 have reached a sufficiently high temperature, molten steel or cast iron can be poured into the mold via a feeder 61. The mold cavity then fills with the molten steel or cast iron. Excess molten metal rises out of the cavity via a riser pipe 62.

[0069] The molten metal flows around the wear protection elements 50.1, 50.2, 20, forming in particular the side edges 17.1, 17.2, 17.3, 19.2, 19.4. Where the mold elements 41.7 are arranged, the recesses 18 are later formed on the finished workpiece 10, which are Fig. 1 are shown.

[0070] After the melt has solidified, a cast-in-place bond has formed at the interface between the wear protection elements 50.1, 50.2 and / or 20. This cast-in-place bond forms a metallurgical connection, creating a diffusion layer in the transition zone between the hard metal material and the cast steel or cast iron material.

[0071] The diffusion layer contains, for example, cobalt, which originates from the cemented carbide, and iron from the cast steel or cast iron material. The diffusion layer bonds the wear-protection elements 50.1, 50.2, and / or 20 to the cast base body. A gradient of iron and cobalt may form from the cast material to the cemented carbide (tungsten carbide) up to the end of the diffusion layer.

[0072] Once the molten metal has solidified, the mold can be separated, as described below. Fig. Figure 9 shows, with the representation of tool 10 without sprue mold and feeder mold 30.1, 30.2 for the sake of clarity ( Fig. 11) was elected.

[0073] Fig. Figure 11 shows the tool 10 removed from the mold. The riser and sprue components 30.1 and 30.2, which are integrally connected to the tool 10, are still visible. These two components 30.1 and 30.2 must be machined off in a subsequent machining step.

[0074] Finally, at least one mounting receptacle 11.1 can also be machined into the mounting section 11. It is also conceivable that at least one mounting receptacle 11.1 is already present on the mold, i.e., that it is formed during the casting process and, if necessary, subsequently machined.

Claims

[1] A tool, in particular for soil cultivation, especially an agricultural soil cultivation tool or a construction soil cultivation tool, with a cast body made of a steel or cast iron material and having a support section (17), wherein one or more wear-protection elements (20, 50.1, 50.2), made of hard metal, are supported on the support section (17) by means of a fastening section (24) and are cast to the support section (17), wherein the at least one wear-protection element (20, 50.1, 50.2) is enclosed at least partially on opposite sides by means of side flanges (17.1, 17.2, 17.3; 19.2, 19.4) of the cast body, characterized by, that at least one of the side edges (17.1, 17.2, 17.3; 19.2, 19.4) is / are interrupted by means of a recess (18), and that the recess (18) extends to a body boundary of the wear protection element (20, 50.1, 50.2). [2] Tool according to claim 1, characterized by , that the recess (18) breaks through the side frame (17.1, 17.2, 17.3; 19.2, 19.4) or that the recess (18) is cut out of the side frame (17.1, 17.2, 17.3; 19.2, 19.4). [3] Tool according to claim 1 or 2, characterized by , that the at least one wear protection element (20, 50.1, 50.2) has two body edges on opposite sides which form body boundaries of the wear protection element (20, 50.1, 50.2), and that recesses (18) are provided on both body edges, preferably being opposite each other. [4] Tool according to claim 3, characterized bythat the body edges run parallel to each other, and that preferably the recesses (18) are opposite each other on a line perpendicular to the body edges. [5] Tool according to any one of claims 1 to 4, characterized by , that the at least one wear protection element (20, 50.1, 50.2) has a fastening piece (21) which is cast-connected to the support section (17) by its rear fastening section (24), that a cutting piece with a cutting edge (22, 51) is molded directly or indirectly onto the fastening section (24), and that preferably the cutting piece is cast-connected to and supported by the support section (17). [6] Tool according to claim 5, characterized by, that a free discharge surface adjoins the cutting edge (22, 51) on the upper side of the wear protection element (20, 50.1, 50.2) opposite the fastening section (24), which is preferably flat and which more preferably extends to the side flange (19.4) opposite the cutting edge (22), wherein it is further preferably provided that a guide surface (19.3) of the cast base body adjoins this side flange (19.4). [7] Tool according to claim 6, characterized by , that the cutting edge (22) is covered at least partially by means of a side surround (17.1, 17.3) of the cast base body. [8] Tool according to any one of claims 1 to 7, characterized bythat two or more, preferably identical, wear protection elements (50.1, 50.2) have aisle sides on which they are aisled, preferably without spacing or leaving an aisle spacing of less than 12 mm, preferably less than 8 mm, particularly preferably less than 5 mm, wherein the aisle sides run transversely to the at least one side frame (17.1, 17.2; 19.2), and wherein the recess (18) of the at least one side frame (17.1, 17.2, 17.3; 19.2, 19.4) is spaced apart from the opposing aisle sides of the two wear protection elements (50.1, 50.2). [9] Tool according to any one of claims 1 to 8, characterized by, that two or more wear protection elements (50.1), preferably identical in construction, are arranged in a row to form a row, that a further wear protection element (50.2) is arranged at one or both longitudinal ends of the row, which has a design that differs from the design of the wear protection element (50.1) which connects to the further wear protection element (50.2), wherein it is preferably provided that the further wear protection element (50.2) has a side cutting edge (55) which extends transversely to the longitudinal extent of the row and a cutting edge (51) which extends in the direction of the longitudinal extent of the row. [10] Tool according to claim 9, characterized by , that the two further wear protection elements (50.2) at the two ends of the series of wear protection elements (50.1) are identical in design. [11] Tool according to any one of claims 1 to 10, characterized by, that at least one wear protection element (50.2,) has a recess (54) which transitions into the recess (18) of the side frame (17.1, 17.2, 17.3; 19.2, 19.4). [12] Tool according to any one of claims 1 to 11, characterized by , that it is a share, in particular a cultivator share, a wing share, a plow share, a breaking tool, a sieve or a counter blade, especially for a combine harvester or forage harvester. [13] Tool according to any one of claims 1 to 12, characterized by , that the recess (18) or at least part of the recesses (18) is covered or at least partially filled by means of an additional material which differs from the material of the cast body. [14] Method for manufacturing a tool (10) for soil cultivation, in particular an agricultural soil cultivation tool or a construction soil cultivation tool, wherein one or more wear protection elements (20, 50.1, 50.2) consisting of hard metal are inserted into a mold part (40) and / or a counter-mold part (60), wherein the mold part (40) and the at least one counter-mold part (60) form a mold with a cavity, an induction heater (70) with at least one induction coil is placed around the outer wall of the mold facing away from the cavity, the heater being arranged in such a way that it couples inductively with the wear protection element(s) arranged in the cavity in order to heat them inductively, and molten iron or molten steel is then poured into the cavity via a sprue. [15] Method according to claim 14, characterized by, that the at least one wear protection element (20, 50.1, 50.2) is inductively heated on at least two sides arranged offset from each other by means of the induction coil(s). [16] Method according to one of claims 14 or 15, characterized by , that at least one wear protection element (20, 50.1, 50.2) is inductively heated to at least 700 °C, preferably at least 900 °C, before the molten iron or molten steel is filled into the cavity. [17] Method according to any one of claims 14 to 16, characterized by , that the wear protection element (20, 50.1, 50.2) is placed on a support surface (41.6) of the molded part (40) or the counter-molded part (60) and is laterally positioned against at least one molded element (41.7) projecting beyond the support surface (41.6), preferably between two molded elements (41.7) abutting opposite sides of the wear protection element on the support surface (41.6). [18] Method according to any one of claims 14 to 17 for manufacturing a tool according to any one of claims 1 to 13.

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