Soil cultivation tool and manufacturing process

Abstract

The invention relates to a soil cultivation tool (1) for processing soil material in a working direction (AR), wherein the soil cultivation tool (1) has a tip (2), wherein at least one working edge (3) is aligned at a working angle (4) to the working direction (AR) and extends towards the tip (2), wherein the soil cultivation tool (1) has a base body (10), wherein a first hard material element (20) is provided in the region of the tip (2) and a second hard material element (50) is provided in the region of the working edge (3), and wherein a butt joint (70) is formed between a side surface (52) of the second hard material element (50) and a side surface (22) of the first hard material element (20).Increased wear resistance is achieved by covering a front end (71) of the butt joint (70), located in the area of ​​the working edge (3) and viewed along a central longitudinal line (72) of the butt joint (70), with the first hard material element (20) and / or the second hard material element (50). The invention also relates to a method for manufacturing at least two soil cultivation tools.

Description

The invention relates to a soil working tool, in particular a share (goosefoot, chopping or wing share), for working soil material in a working direction, wherein the soil working tool has a tip in a region which is front in the working direction, wherein at least one working edge is provided which is oriented at a working angle to the working direction and extends towards the tip, wherein the soil working tool has a base body, wherein a first hard material element is provided on the base body in the region of the tip, wherein a second hard material element is provided on the base body in the region of the working edge, and wherein a joint is formed between a side surface of the second hard material element and a side surface of the first hard material element.A soil working tool according to the invention can be, in particular, a goose foot or wing share, the base body of which has two wings, which extend laterally and to the rear starting from the tip. The working edges can be formed on the wings in this case. The working angle can correspond to half the tip angle of a goose foot or wing share which is formed between the working edges formed on the wings.A soil working tool in the form of a rubber tip is known from EP 3 289 845 B1. The rubber tip is arrow-shaped and has a cutter carrier, to which two arms connect laterally. In the region of a tip which is at the front in the feed direction, the cutter carrier is provided with a cutting element. Following the cutting element, the cantilevers are provided with hard material covers. A butt joint formed between the cutting element and an adjacent hard material cover is aligned substantially parallel to the feed direction.A wing share tip is known from DE 10 2019 106 393 A1. The blade blade tip has a base body which is V-shaped and has a central region and two adjoining blades which converge to form a tip. In the region of the tip, a hard material plate tip is provided. Hard material plates are arranged in the region of cutting edges formed at the front edges of the wings. Between the hard material plate tip and an adjacent hard material plate, a joint is formed which is oriented substantially perpendicular to the cutting edge and thus at an angle to a machining direction.EP 3 959 953 A1 discloses a soil working tool in the form of a rubber blade. The scrubber blade is again configured in the shape of an arrow. In the region of a tip of the blade, a hard metal tip is provided. The edges on the front side are coated with hard metal platelets. Between the carbide tip and an adjacent carbide plate, a butt joint is formed which is oriented at an angle to a ground machining direction.It is an object of the invention to provide a soil working tool of the type mentioned at the beginning which is distinguished by increased wear resistance.It is a further object of the invention to provide a method for producing at least two soil working tools which is distinguished by reduced outlay on parts.The object relating to the soil working tool is achieved in that an end of the joint which is arranged in the region of the working edge and is front with respect to the working direction, as viewed along a central longitudinal line of the joint, is covered by the first hard material element and / or the second hard material element.The central longitudinal line of the joint is understood in particular to mean a line which is at the same distance along the course of the joint from the side surface of the first hard material element and the side surface of the second hard material element perpendicular to its course. The central longitudinal line of the joint may extend centrally with respect to the joint height of the joint. The joint height can correspond here to a height measured between an underside facing the base body and an upper side of the first and / or of the second hard material element facing away from the base body. The central longitudinal line thus follows the joint course of the joint. It can run in a straight line or curved manner.The front end of the butt joint, which is arranged in the region of the working edge, can be opposite along the central longitudinal line an end of the butt joint which is rear with respect to the working direction and is remote from the working edge.A working direction is understood in particular to mean a direction in which the soil working tool is guided through the soil to be worked during soil working.The first and / or the second hard material element is / are preferably manufactured from a hard material which is more wear-resistant than the material of the base body of the soil processing tool with respect to abrasive attack of the processed soil material. In particular, the first and / or the second hard material element can / can comprise a hard metal (cemented carbide) and / or a ceramic material, preferably consist of a hard metal and / or a ceramic material. A hard metal is understood in particular to mean a metal matrix composite material. Here, particles of hard materials such as, for example, carbindenes, nitrides and / or oxides are held in a metallic matrix. Preferably, a hard material element can comprise a hard metal, in particular consist of a hard metal element comprising tungsten carbide particles.The hard material elements can protect the base body from excessive wear. Nevertheless, in particular in the region of the joint, wash-outs of the material of the base body can occur if processed base material reaches the joint and acts there with abrasive action on the base body. Furthermore, it can be provided that in the region of the joint solder material and / or adhesive is present, by means of which the hard material elements are fixed to the base body and / or to one another. The solder material or the adhesive is likewise less wear-resistant than the material of the hard material elements compared to the base material. Consequently, in the region of the joint, wash-outs of the solder material or adhesive can likewise occur. As a result, the connection of the hard material elements to the base body can be weakened, as a result of which breakage or loss of hard material elements can possibly occur.The inventors have recognized that a considerably improved protection against premature wear of the soil working tool, in particular in the region of the joint, results when the front end of the joint, as viewed along the central longitudinal line of the joint, is covered. In this way, it is effectively prevented that soil material to be processed reaches the joint in the region of the front end and is conveyed from there along the joint.A particularly effective protection against wear can be achieved here if the covering of the front end of the butt joint is provided over an entire joint height of the butt joint.The first and / or second hard material element / s can each have a central transverse plane. The central transverse plane of a hard material element can be a plane which is arranged between an upper side of a hard material element and an underside which is oriented towards the base body. The underside of a hard material element can have a bearing surface which comes to at least partially, indirectly or directly support on a receiving surface of the base body. The central transverse plane can in particular notionally divide the hard material element into an upper and a lower mass and / or volume half.According to a variant of the invention, it can be provided that, viewed in projection onto a central square plane of the second hard material element, the second hard material element tapers at an acute angle in the region of a front corner with respect to the working direction. This results in an advantageous geometry which enables a compact configuration of the soil working tool in the region of the tip.If it is further provided here that the front corner is at least partially covered by the covering of the front end of the joint, the front corner is protected from the attack of the floor material to be worked. In this context, the term overlap is to be understood as meaning, in particular, an overlap in the direction along the central longitudinal line of the joint. The overlap significantly reduces the risk of breakage caused by impact loads, for example, by stones contained in the soil to be worked. The covering can be provided in particular by the first hard material element.A compact configuration of the first and / or the second hard material element can be achieved if it is provided that the first hard material element and / or the second hard material element have / have a shoulder in the region of the front end of the joint. Preferably, the overlapping of the front end of the butt joint is achieved at least partially by means of the shoulder.If it is further provided that the shoulder is provided in a front half of a longitudinal extension of the first hard material element measured in the working direction with respect to the working direction, a stable construction of the soil working tool results. In this way, it is achieved that a large part of the longitudinal extension of the first hard material element is present in a region behind the front end of the joint and the working edge. The first hard material element can thus be supported on the base body over a large region of its longitudinal extent, as a result of which the stability of the soil working tool can be increased. The shoulder can preferably be provided within the front 40% of the longitudinal extent of the first hard material element.Good protection against abrasive and / or impact-like attack by the floor material to be processed can be achieved in particular by the shoulder protruding beyond the side surface of the first hard material element in the direction of a transverse extension of the first hard material element measured transversely to the working direction and parallel to a central transverse plane of the first hard material element. In particular, it can further be provided that the transverse extension of the first hard material element has its maximum value in the region of the projection.According to an advantageous development of the invention, it is proposed that a back surface pointing counter to the working direction is provided on the shoulder, which back surface adjoins the side surface indirectly or directly. A receiving space can thus be at least partially delimited by the side face of the first hard material element, the back face and the side face of the second hard material element. The receiving space can preferably serve to receive a cohesive connection means, in particular a solder and / or an adhesive, for connecting the first and / or second hard material element to the base body and / or to one another. The receiving space can thus preferably form a soldering gap and / or an adhesive gap.The back surface can preferably be at an angle to the side surface or to a tangent to the side surface lying in a central surface of the first hard material element.A preferred embodiment of the invention can be such that the side surface of the first hard material element has a convex curvature at least in regions in the region of the joint, viewed in projection onto the / a central surface plane of the first hard material element. Such convex curvature can increase a margin in the selection of the working angle of the soil working tool. Thus, by means of this configuration, it may be possible to use the same first hard material element with different base bodies which have different working angles. Due to the convex curvature, a collision between corners of the first and second hard material elements is avoided even in the case of an enlarged or reduced working angle. With such a first hard material element, the parts outlay can thus be reduced.According to a further variant of the invention, it is conceivable that the side surface of the second hard material element has a concave curvature at least in regions, as viewed in projection onto the / a central surface of the second hard material element in the region of the joint. In particular, if, as described above, the first hard material element has a convex curvature on its side surface, the side surfaces of the first and of the second hard material element are then designed to correspond at least partially to one another. An undesirable locally reduced or increased width of the joint can be reduced in this way. Thus, on the one hand, an abutting of the hard material elements against each other can be avoided and, on the other hand, an abrasive attack on the material of the base body and / or a solder material or adhesive within the abutting joint caused by an excessive joint width can be at least largely prevented.If the side surface of the first hard material element has a convex curvature at least in regions and the side surface of the second hard material element has a concave curvature at least in regions, a further improvement in the clearance in the selection of the working angle results, moreover.An advantageous variant of the invention is such that, viewed in projection onto the / a central square plane of the first hard material element, a radius of curvature of the side surface of the first hard material element, and / or, viewed in projection onto the / a central square plane of the second hard material element, a radius of curvature of the side surface of the second hard material element is, on average, at least 75% of a joint length of the joint joint measured along the central longitudinal line of the joint joint, preferably corresponds, on average, to at least the joint length.The joint length is preferably measured between the front end of the joint with respect to the working direction and the rear end with respect to the working direction. For example, the joint length can be measured between a first point of the side surface of the first or second hard material element in the direction of the central longitudinal line, to which point a point of the side surface of the second or first hard material element is opposite transversely to the central longitudinal line, and a last point of the side surface of the first or second hard material element in the direction of the central longitudinal line, to which point a point of the side surface of the second or first hard material element is opposite transversely to the central longitudinal line.Curvature of the side surface may increase a margin in the selection of the working angle. Thus, by means of this embodiment, it may be possible to use an identical first and / or second hard material element with base bodies which have different working angles. By means of the curvature, a collision between corners of the first and second hard material elements can be avoided even in the case of an enlarged or reduced working angle. The outlay on parts can thus be reduced.With the proposed ratio between the radius of curvature and the joint length, a large radius of curvature, viewed relative to the joint length, can be provided on the side surface of the first and / or second hard material element. The large radius of curvature results in a relatively weak curvature of the side surface. Such a weak curvature offers the advantage that the first and / or the second hard material element can / can be configured compactly, wherein the variability with respect to the working angle is simultaneously maintained. In addition, such a weak curvature can simplify the production of the base body. Thus, for example, a receiving surface of the base body on which a hard material element rests at least in regions does not have to be adapted exactly to the curved contour of the hard material element. Rather, the slightly curved contour can be approximated by a straight line, so that a receiving surface with straight contours can be produced, which significantly simplifies, for example, a milling process of the base body for producing the support surfaces.A preferred embodiment of the invention can be characterized in that the first hard material element has on its underside a support surface directed towards the base body for at least partial support on a first receiving surface of the base body. The support can be indirect or direct in this case. In particular, it can be provided that a solder and / or an adhesive is arranged between the hard material element and the base body at least in regions. If it is further provided that a thickening is provided adjacent to the support surface, in a region which is front with respect to the working direction, said thickening protruding beyond the support surface, and that the / a shoulder is provided in the region of the thickening and / or the / a transition between the support surface and the thickening, the shoulder is arranged in a stable region of the first hard material element. This results in an approach which can also withstand impact-like loads and reliably covers the front end of the joint.In particular, it can be provided that in the transition between the support surface and the thickening a guide surface is provided which is at an angle to the support surface. The guide surface can be supported on a counter guide surface of the base body.A further variant of the invention can be such that the first hard material element has on its underside a support surface directed towards the base body for at least partial support on a first receiving surface of the base body, that a thickening is provided adjacent to the support surface, in a region which is front with respect to the working direction, which thickening protrudes beyond the support surface, wherein a guide surface which is at an angle to the support surface is provided in the transition between the support surface and the thickening, and wherein the guide surface is supported on a counter-guide surface of the base body. This results in a particularly good support of the first hard material element counter to the working direction. The guide surface preferably has a surface normal which has at least one component which is oriented counter to the working direction. Furthermore, the counter guide surface preferably has a surface normal which has at least one component which is aligned in the working direction. It is in particular conceivable for the shoulder to be arranged in the region of the transition between the bearing surface and the guide surface. A shoulder arranged in this stably supported region can be particularly mechanically resistant.A cutting-ready soil working tool can be provided in particular if it is provided that the first hard material element has a cutting region in a / its front region in the working direction. A risk of breakage of the cutting region can be reduced in that the cutting region has a convexly curved curvature section when viewed in projection onto the / a central surface plane of the first hard material element. Furthermore, it can be provided that, following the curved section counter to the working direction, a side section of the cutting region adjoins which is oriented at an angle to the working direction. In this case, it can preferably be provided that the side portion, viewed in projection onto the central square plane of the first hard material element, is of rectilinear design.According to an advantageous development of the invention, it can furthermore be provided that, viewed counter to the working direction, a transverse extension of the first hard material element measured transversely to the working direction is enlarged by the course of the curved section and of the side section, that the side section ends in the / a shoulder viewed counter to the working direction, and that the side face of the first hard material element is indirectly or directly adjoining the shoulder counter to the working direction. In this way, a cutting-like, fracture-resistant and compact first hard material element is provided.A soil working tool according to the invention can also be characterized in that the base body has a first receiving surface in the region of the tip, in that the first hard material element has a bearing surface directed towards the first receiving surface on its underside, in that the first hard material element is supported with its bearing surface on the first receiving surface at least in regions, preferably completely, and in that the bearing surface of the first hard material element and / or the first receiving surface is / are at least predominantly planar. A predominantly planar surface can be a surface which is configured planar. A planar surface which has spatially limited elements such as bores or projections deviating from the planar configuration can also be understood as a predominantly planar surface.Within the scope of the invention, it can also be provided that the base body has a second receiving surface in the region of the working edge, that the second hard material element has a bearing surface directed towards the second receiving surface on its underside, that the second hard material element is supported with its bearing surface on the second receiving surface at least in regions, preferably completely, and that the bearing surface of the second hard material element and / or the second receiving surface is / are at least predominantly planar.A variant of a soil working tool according to the invention can also be characterized in that the first receiving surface and the second receiving surface are at an angle to one another, in that the first receiving surface and the second receiving surface merge into one another in a joint, and in that the joint is formed in a straight line and / or has a course which is different from a course, in particular a curvature, of the side surface of the first and / or of the second hard material element.According to a further development of the invention, it is proposed that the first hard material element has, in a region which is rear with respect to the working direction, preferably in the region of an edge which is rear with respect to the working direction, a centring shoulder which projects beyond the / a bearing surface of the first hard material element in the direction of the base body, and that the / a first receiving surface of the base body, on which the first hard material element is applied with its bearing surface, has an at least partially corresponding centring receptacle. In this way, the first hard material element can be reliably positioned before being fastened to the base body, in particular before the production of a soldered connection and / or an adhesive connection, by the interaction of the centering projection with the centering receptacle.The object relating to the method is achieved by a method for producing at least two soil working tools, which comprises the following steps in each case for a first soil working tool and a second soil working tool:providing at least one base body;applying the first hard material element to the / a first receiving surface provided on the base body;applying the second hard material element to the / a second receiving surface provided on the base body;connection of the first and second hard material elements to the base body, in particular a cohesive connection, preferably a soldered connection and / or an adhesive connection.In this case, it is further provided that a first base body of the first soil working tool, which has a first working angle between the working edge and the working direction, is equipped with first and second hard material elements of a first geometric configuration, and that a second base body of the second soil working tool, which has a second working angle, which differs from the first working angle, between the working edge and the working direction, is equipped with first and second hard material elements of the same geometric configuration, namely the first geometric configuration. Identical parts can thus be used, which can reduce the parts outlay.The object relating to the method is also achieved by a method for producing at least two soil working tools, which comprises the aforementioned steps for a first soil working tool and a second soil working tool, wherein it is further provided that a first base body of the first soil working tool, which has a first bending angle, is equipped with first and second hard material elements of a first geometric configuration, and that a second base body of the second soil working tool, which has a second bending angle deviating from the first bending angle, is equipped with first and second hard material elements of the same geometric configuration, namely the first geometric configuration. A bending angle may be an angle formed between projections of opposing working edges onto a surface that is perpendicular to the working direction. In particular, the opposing working edges can be formed on opposing wings of a wing or goose foot share. A bending angle can also be an angle formed between projections of upper and / or lower sides of the base body, which are arranged in the region of opposite wings, onto a surface which is perpendicular to the working direction.The object relating to the method is furthermore achieved by a method for producing at least two soil working tools, which comprises the aforementioned steps for a first soil working tool and a second soil working tool, wherein it is further provided that a first base body of the first soil working tool, which has a first angle of attack, is equipped with first and second hard material elements of a first geometric configuration, and that a second base body of the second soil working tool, which has a second angle of attack that differs from the first angle of attack, is equipped with first and second hard material elements of the same geometric configuration, namely the first geometric configuration. An angle of attack can be, in particular, an angle which a receiving surface for a first or second hard material element encloses in a section perpendicular to the alignment of the working edge with an upper side and / or lower side of the base body in an adjacent region outside the receiving surface.The invention is explained in more detail below with reference to exemplary embodiments shown in the figures. They show FIG. 1 : shows a schematic perspective illustration of a soil working tool, FIG. 2 : shows a schematic plan view of the tip of the soil working tool, FIG. 3 is a schematic front view, partially cut away, of the soil working tool, FIG. 4 : shows a schematic perspective view of a first hard material element, FIG. 5 : shows a schematic side view of the first hard material element, FIG. 6 : shows a schematic plan view of the first hard material element, FIG. 7 : shows a further schematic perspective view of the first hard material element, FIG. 8 : shows a schematic perspective view of a second hard material element, FIG. 9 : shows a schematic plan view of the second hard material element, FIG. 10 : shows a further schematic perspective view of the second hard material element, FIG. 11 : shows a schematic perspective view of a base body of the soil working tool, FIG. 12 : shows a schematic top view of the tip of a first soil working tool with a first working angle, FIG. 13 : shows a schematic plan view of the tip of a second soil working tool with a second working angle, FIG. 14 : shows a schematic rear view of a wing of the soil working tool from the perspective marked XIV in FIG. 1.FIG. 1 shows a schematic perspective illustration of an embodiment of a soil working tool 1. As can be seen from the figure, the soil working tool 1 can be a goose-foot blade. The soil working tool 1 can be introduced into a soil to be worked and guided through the soil along a working direction AR in order to process it.As can be further seen from FIG. 1, the soil working tool 1 has a tip 2 in a region at the front in the working direction AR. Furthermore, the soil working tool 1 has at least one, in the present case two, working edges 3 which run / run towards the tip 2. The working edges 3 extend at a working angle 4 with respect to the working direction AR. If the soil working tool 1 is, as illustrated in the present case, a goose-foot blade or else a wing blade, the working angle 4 can correspond to half an apex angle 6. The apex angle 6 can be an angle at which the working edges 3 are oriented with respect to one another.The goose-foot share shown in the figures has two wings 9 which extend from the tip 2 counter to the working direction AR to the rear and laterally to the outside. The working edges 3 can be formed on the wings 9.As can be seen in FIG. 1, the soil working tool 1 has a base body 10. On the base body 10, a first hard material element 20 is provided in the region of the tip 2. In the region of the working edge 3, a second hard material element 50 is provided on the base body 10. In particular, if, as illustrated, the soil working tool 1 has two working edges 3, a second hard material element 50 can be provided on each of the two working edges 3. A joint 70 is formed between the first hard material element 20 and the second hard material element 50.Furthermore, the soil working tool 1 can have at least one third hard material element 80 in the region of the working edge(s) 3. A third hard material element can adjoin the second hard material element 50 along the working edge 3, as viewed from the tip 2. In the exemplary embodiment shown, both working edges 3 are partially covered with third hard material elements 80. A further joint 75 can be formed between the second hard material element 50 and a third hard material element 80 and between a third hard material element 80 and a further third hard material element 80.The first, the second and / or the third hard material element 20, 50, 80 can / can preferably be manufactured from a hard material which is more wear-resistant than the material of the base body 10 of the soil working tool 1 with respect to an abrasive attack of the machined soil material. In particular, the hard metal can be a metal matrix composite material. Preferably, the cemented carbide may comprise tungsten carbide.FIG. 11 shows the base body 10 in more detail in a perspective view. The base body 10 can consist or be produced, for example, from a bent sheet metal part, a forged part or a cast part. The base body 10 is preferably made of a tough material, so that it is insensitive to shock loads.A fastening attachment 16 can be provided on the base body. Preferably, the fastening attachment 16 can be provided in a rear region of the base body 10 with respect to the working direction AR. As shown, the fastening attachment 16 can be integrally formed on the base body 10. However, it is also conceivable for the fastening attachment 16 to be fastened to the base body 10 in another manner, for example screwed to the latter. The fastening attachment 16 can serve for fixing the soil working tool 1 to an agricultural device and / or machine. For this purpose, fastening means can be provided in the region of the fastening attachment 16. As in the present case, for example, a fastening receptacle 17 can be provided on the fastening attachment 16.As can be seen with reference to FIGS. 11 and 3, the base body 10, in particular if the soil working tool 1 is designed as a goose foot or wing share, can have a bending angle 7. Accordingly, the wings 9 of the soil working tool 1 or the regions of the base body 10 assigned to the wings 9 can be angled relative to one another about a bending axis 7.1. The bending axis 7.1 is preferably located in a central longitudinal plane of the soil working tool 1, which is preferably oriented parallel to the working direction AR. In a front view of the tip 2, as seen in FIG. 3, the bending angle 7 can correspond to an angle which the working edges 3 assume with respect to one another in this view. The bending angle 7 may also correspond to an angle that the upper sides and / or lower sides of the base body 10, which are arranged on opposite wings, assume with respect to one another in this view.In the region of the tip 2, a first receiving surface 11 can be provided on the base body 10, which can serve for at least partially supporting the first hard material element 20. The first receiving surface 11 is preferably offset with respect to an upwardly directed surface 19 of the base body 10. It is preferably provided set back with respect to the surface 19. The first receiving surface 11 can be formed integrally therewith during the production of the base body 10, in particular by a ur- or forming method. Preferably, however, the first receiving surface 11 is formed on the base body 10 by a machining method, in particular by a milling method.As is clearly evident from FIG. 11, the first receiving surface 11 can be configured planar. A planar first receiving surface 11 can be produced with little manufacturing effort.In the region of an end facing away from the working direction AR, a first contact surface 11.1 can be formed on the first receiving surface 11. The first contact surface 11.1 is preferably at an angle to the first receiving surface 11. The first contact surface 11.1 can support the first hard material element 20, in particular in a direction opposite to the working direction AR. Preferably, a rear side 49 of the first hard material element 20 can be supported at least partially indirectly or directly on the first contact surface 11.1.In the region of the first receiving surface 11, a centering receptacle 14 can furthermore be provided. The centering receptacle 14 can be configured as a bore in the first receiving surface 11. The centering receptacle 14 is preferably provided in a rear region of the first receiving surface 11 with respect to the working direction AR.In the working direction AR, the first receiving surface 11 can be adjoined by a counter-guide surface 13, which preferably adjoins the first receiving surface 11 at an angle. The counter guide surface 13 can have a surface normal which has at least one component in the working direction AR. A guide surface 39 of the first hard material element 20 can be supported indirectly or directly on the counter guide surface 13, which guide surface can be designed at least partially to correspond to the counter guide surface 13.As can be further seen from FIG. 11, a second receiving surface 12 can be provided along the working edge 3 next to the first receiving surface 11. The second receiving surface 12 can serve for the at least partial indirect or direct support of the second hard material element 50. The second receiving surface 12 can likewise be set back with respect to the surface 19. The second receiving surface 12 can also be produced in a moulding or preferably machining manner on the base body 10. Preferably, the second receiving surface 12 is also configured planar. Preferably, in a region of the second receiving surfaces 12 facing away from the working edge 3, an angled second contact surface 12.1 can be connected. The second contact surface 12.1 can result as a step from the rearward offset of the second receiving surface 12 with respect to the surface 19 of the base body 10. On the second contact surface 12.1, the second hard material element 50, in particular with a rear side 62, can be supported at least partially counter to the working direction AR and / or a direction away from the working edge 3.The second receiving surface 12 can be adjoined in the course of the working edge 3 by a third receiving surface 18 for one or more third hard material elements 80. As can be seen from FIG. 11, the third receiving surface 18 can be configured substantially in accordance with the second receiving surface 12, so that reference can be made to the above explanations. Preferably, the second receiving surface 12 can merge directly into the third receiving surface 18. In this way, the second receiving surface 12 and the third receiving surface 18 can be processed in one working step, in particular within a common milling process.As can be further seen from FIG. 11, a joint 15 can be formed between the first receiving surface 11 and the second receiving surface 12. If both the first receiving surface 11 and the second receiving surface 12 are planar, the joint 15 can result in a straight line.A preferred embodiment of the first hard material element 20 can be seen more clearly in FIGS. 4 to 7.The first hard material element 20 can have an upper side 23 and an underside 24. The upper side 23 can form a discharge surface, via which the floor material is discharged during the processing at least partially counter to the working direction AR. The underside 24 can be directed in the direction of the base body 10. In particular, a support surface 24.1 can be defined on the underside 24, which is supported indirectly or directly on the first receiving surface 11 of the base body 10. Indirect support can be provided, for example, when a solder material and / or an adhesive is provided between the first hard material element 20, in particular the bearing surface 24.1 of the first hard material element 20, and the base body 10.The support surface 24.1, as illustrated in the present case, can preferably be planar. In the region of the bearing surface 24.1, a centering shoulder 43 can be provided, which projects beyond the bearing surface 24.1 in the direction of the base body 10. The centering projection 43 can be provided to be accommodated in the centering receptacle 14 of the base body 10 (see FIG. 11 ). For example, the first hard material element 20 can be reliably positioned before being fastened to the base body 10, in particular before the production of a soldered connection and / or an adhesive connection, by the interaction of the centering projection 43 with the centering receptacle 14.As can be seen in particular with reference to FIGS. 4 and 6, the first hard material element 20 can have a cutting region 31 in a region 25 which is front with respect to the working direction AR. The cutting region 31 can serve to cut and / or displace soil material located in front of the first hard material element 20 in the working direction AR. The cutting region 31 can preferably have a curvature section 32 which, in projection onto a central surface 46 of the first hard material element 20, has a convex curvature.The central transverse plane 46 of the first hard material element 20 can be a plane which is arranged between an upper side 23 of the first hard material element 20 and the lower side 24. The central transverse plane 46 can in particular notionally divide the first hard material element 20 into an upper and a lower mass and / or volume half.Viewed counter to the working direction AR, the curved section 32 can be adjoined by a side section 33 of the cutting region 31. Preferably, the side section 33 is formed straight in projection onto the central square plane 46. The side section 33 can be projected onto the central square plane 46, in particular at an angle to the working direction AR.The cutting region 31 is preferably from a front side 34 of the first hard material element 20 and / or a transition, in particular an edge between the front side 34 and the upper side 23 of the first hard material element 20. This can reduce the risk of material breakage at the cutting region 31.As can be further seen with reference to FIG. 4, the upper side 23 of the first hard material element 20 can have a rear section 23.2 with respect to the working direction AR and a front section 23.1 with respect to the working direction AR. Preferably, the front section 23.1 is arranged in the front region 25, and the rear section 23.2 is arranged in the rear region 26 of the first hard material element 20. The front section 23.1 is preferably formed angled with respect to the rear section 23.2, in a section through the first hard material element 20, in a central longitudinal plane 47 of the first hard material element 20.The central longitudinal plane 47 is preferably oriented parallel to the working direction AR and penetrates the upper side 23 and the lower side 24 of the first hard material element 20.The first hard material element 20 can have at least one side surface 22. Preferably, the first hard material element 20, as illustrated in the present case, has two side surfaces 22. The side surfaces 22 can be opposite each other with respect to the central longitudinal plane 47, and can be configured in particular symmetrically with respect to the latter. By means of the side surfaces 22, the upper side 23 and the lower side 24 can be connected in regions.As is evident in particular in FIG. 6, the side surface 22 can have a convex curvature 29 as viewed in projection onto the central square plane 46. Thus, in the region of the side surface 22, in the plan view of the upper side 23 and / or in projection onto the central surface 46, a bulbous shape of the first hard material element 20 can result.Preferably, the curvature 29 has a comparatively large radius of curvature 30. As illustrated here, the curvature 29 can have a radius of curvature 30 which on average amounts to at least 75%, preferably at least 100%, of a joint length 74 of the joint 70 measured along a central longitudinal line 72 of the joint 70. The joint 70 will be discussed in more detail later.As can be seen in particular in FIG. 5, the first hard material element 20 can have a thickening 37 in its front region 25. Preferably, the thickness measured between the upper side 23 and the lower side 24 of the first hard material element 20 is increased in regions by the thickening 37. In particular, the thickening 37 can be such that, viewed in the working direction AR, the contact surface 24.1 of the first hard material element 20 is adjoined by a lower deflection surface 24.2, which is arranged offset with respect to the contact surface 24.1 in the direction of its surface normal.The lower discharge surface 24.2 can be oriented at an angle to the upper side 23, in particular to the front section 23.1 of the upper side 23, preferably in such a way that, viewed in section along the central longitudinal plane 47 of the first hard material element 20, a tapering of the front region 25 of the first hard material element 20 in a wedge shape in the working direction AR results towards the cutting region 31. In this way, the first hard material element 20 can be configured to be cutting-friendly.A transition 38 can be provided between the support surface 24.1 and the lower discharge surface 24.2. In particular, the transition 38 can be formed by a guide surface 39 which is at an angle to the bearing surface 24.1 and the lower deflection surface 24.2.The guide surface 39 is preferably oriented toward the counter guide surface 13 provided on the base body 10. The guide surface 39 can be supported directly or indirectly on the counter guide surface 13. Thus, the first hard material element 20 can be additionally supported on the base body 10 in the direction opposite to the working direction AR.As is clear from FIGS. 4 to 7, the first hard material element 20 can have a shoulder 21. Preferably, as illustrated in the present case, two projections 21 can be provided, which are opposite each other with respect to the central longitudinal plane 47 of the first hard material element 20 and are particularly preferably formed symmetrically with respect to the same.The shoulder 21 can protrude beyond the side surface 22 in a direction transverse to the working direction AR and parallel to the central surface 46 of the first hard material element 20. Preferably, a transverse extension 28 of the first hard material element 20 can have a maximum value in the region of the projections 21. The transverse extension 28 can be dimensioned transversely to the working direction AR and parallel to the central surface 46 of the first hard material element 20.The shoulder 21 is preferably provided in a front half, with respect to the working direction AR, of a longitudinal extension 27 of the first hard material element 20 measured in the working direction AR, particularly preferably, as illustrated in the present case, within the front 40% of the longitudinal extension 27.The shoulder 21 can adjoin the cutting region 31, viewed counter to the working direction AR, in particular to the curved section 32 or particularly preferably to the side section 33 according to the present exemplary embodiment.Advantageously, the shoulder 21 can be provided in the region of the thickening 37. This has the effect, on the one hand, that the shoulder 21 is provided in a region of the first hard material element 20 which is particularly stable and well supported. Moreover, it can be achieved in this way that the shoulder 21 has a sufficient height in order to cover, for example, a joint height 73 of the joint joint 70 between the first hard material element 20 and the second hard material element 50.In the region of the projection 21, a back surface 45 can be provided. The back surface 45 can have, in particular, a surface normal which has at least one component counter to the working direction AR. The back surface 45 can be directly or indirectly adjacent to the side surface 22 of the first hard material element 20.FIGS. 8 to 10 show an embodiment of the second hard material element 50 in more detail. The second hard material element 50 can have an underside 54 which is oriented in the direction of the base body 10. In particular, a support surface 55 can be formed on the underside 54, by means of which support surface the second hard material element 50 can be supported indirectly or directly on the base body 10, in particular on the second receiving surface 12. Indirect support can be provided, for example, if a solder material and / or an adhesive is provided between the second hard material element 50, in particular the bearing surface 55 of the second hard material element 50, and the base body 10.Preferably, the support surface 55 can be planar.Opposite the underside 54, the second hard material element 50 can have an upper side 53. The top surface 53 may form a drain surface for the processed soil material. Preferably, the top side 53 can be formed parallel to the bottom side 54. However, it is also conceivable for an angle to be provided between the upper side 53 and the lower side 54.Between the upper side 53 and the lower side 54, the second hard material element 50 can have a central surface 59. The central transverse plane 59 can in particular notionally divide the second hard material element 50 into an upper and a lower mass and / or volume half.The second hard material element 50 has a side surface 52 which is oriented toward the side surface 22 of the first hard material element 20 (see FIGS. 1 and 2 ). The side surface 52 can connect the upper side 53 and the lower side 54 of the second hard material element 50 in regions. Opposite the side surface 52, the second hard material element 50 can furthermore have a side surface 64 facing away from it. The facing-away side surface 64 can be oriented in the direction of a side surface of an adjacent third hard material element 80.Furthermore, the second hard material element 50 can have a front side 63 oriented toward the working edge 3 and an opposite rear side 62. The rear side 62 can be supported at least partially indirectly or directly on the second contact surface 12.1 of the second receiving surface 12 of the base body 10.The front side 63 and / or a transition, in particular an edge, between the front side 63 and the top side 53 can / can form a cutting edge 51. Preferably, transitions between sides 52, 53, 54, 62, 63 and / or 64 may be rounded or beveled to reduce the risk of edge breakage.As can be seen in particular in FIG. 9, the side surface 52, as viewed in a plan view or in projection onto the central square plane 59, can have a concave curvature 57.Preferably, the curvature 57 has a comparatively large radius of curvature 58. As shown herein, the curvature 57 can have a radius of curvature 58 that is on average at least 75%, preferably at least 100%, of the joint length 74 of the joint 70. The joint 70 will be discussed in more detail later.As can be further seen from FIGS. 8 to 10, the second hard material element 50, viewed in projection onto the central square plane 59, can taper at an acute angle onto a front corner 61. The front corner 61 is preferably provided on the second hard material element 50 protruding with respect to the working direction AR (cf. FIG. 2 ). Thus, the side surface 52, or a tangent to the side surface 52, as viewed in projection onto the central square plane 59, can be oriented at an acute angle to the front side 63.The third hard material element 80 can be plate-shaped. The third hard material element 80 preferably has a cutting edge 81 directed towards the working edge 3 on a front side 92 and / or a transition between its front side 92 and an upper side 83 facing away from the base body 10. Mutually opposite side surfaces 82, which are oriented toward the facing-away side surface 64 of the second hard material element 50 and / or toward a side surface 82 of a further third hard material element 80 for forming a further butt joint 75, can preferably be embodied in a planar manner. Apart from this, the third hard material element 80 can be substantially similar in design and can be supported and / or fastened on the base body 10 in a comparable manner to the second hard material element 50.As already indicated, a joint 70 is formed between a side surface 22 of the first hard material element 20 and a side surface 52 of the second hard material element 50. The joint 70 is particularly clearly shown in FIG. 2.A central longitudinal line 72 is defined for the joint 70. The central longitudinal line 72 follows the course of the joint 70. in particular, the central longitudinal line 72 can be a line which runs within the joint 70 and is at an equal distance from the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 along its course. Accordingly, the central longitudinal line 72 can run centrally between the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50.The central longitudinal line 72 may also extend centrally with respect to a joint height 73 (see FIG. 3 ) of the butt joint 70. The joint height 73 can be dimensioned as a height between an underside 54 directed toward the base body 10 and an opposite upper side 53 of the second hard material element 50. The joint height 73 can also be dimensioned as a height between an underside 24 directed toward the base body 10, in particular a bearing surface 24.1 provided on the underside 24, and an opposite upper side 23 of the first hard material element 20.As can be further seen from FIG. 2, the joint 70 has a front end 71 with respect to the working direction AR. The front end 71 is arranged in the region of the working edge 3. The front end 71 is thus to be distinguished from an opposite rear end 76, which is not arranged in the region of the working edge 3 but rather faces away from the working edge 3 as viewed along the central longitudinal line 72.The front end 71 of the joint 70 can be a region in which, viewed along the central longitudinal line 72 and running toward the working edge 3, last points of the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 are situated opposite one another transversely with respect to the central longitudinal line 72.Likewise, the rear end 76 of the joint 70 can be a region in which, viewed along the central longitudinal line 72 and running toward the working edge 3, first points of the side surface 22 of the first hard material element 20 and of the side surface 52 of the second hard material element 50 are situated opposite one another transversely with respect to the central longitudinal line 72.A joint length 74 may be measured along the central longitudinal line 72 of the butt joint 70 from the rear end 76 to the front end 71.As is clearly evident from FIG. 2, the front end 71 of the joint 70 is covered as viewed along the central longitudinal line 72. As illustrated here, the front end 71 of the joint 70 can be covered by the first hard material element 20. However, it is also conceivable for the front end 71 of the joint 70 to be covered by the second hard material element 50.Overlapping the front end 71 of the butt joint 70 as viewed along the central longitudinal line 72 makes it difficult for soil material to enter the butt joint 70. Thus, the region of the joint 70 can be protected from abrasive attack by the floor material. It is particularly advantageous here that the overlap is provided not only in the working direction AR, as can already be achieved, for example, by orienting the joint 70 at an angle to the working direction AR. Rather, it is provided that the front end 71 of the joint 70 is covered as viewed along the central longitudinal line 72. Thus, entry of soil material into the joint 70 is made difficult. This results in a labyrinthine seal of the front end 71 of the joint.The reduced introduction of abrasive floor material into the joint 70 can protect the base body 10 from excessive wear. Thus, penetration of floor material into the joint 70 and a subsequent contact of the floor material with a joint floor, which may be formed by a receiving surface 11, 12, 18 of the base body 10, is made more difficult. Furthermore, any solder material present in the joint and / or an adhesive which can be provided for fixing the hard material elements 20, 50 to the base body 10 and / or to one another is / can be protected from the abrasive attack of the base material. The covering can thus increase the service life of the soil working tool 1.According to the exemplary embodiment shown in the figures, the overlap can be achieved by means of the projection 21. In the present case, two projections 21 are provided on the first hard material element 20, which cover front ends 71 of joint joints 70 formed on both sides of the first hard material element 20.Advantageously, the extension 21 also covers the front corner 61 of the second hard material element 50, as a result of which it is protected from the engaging ground material, in particular from an impact load due to hard elements, such as stones or the like, which may be present in the ground.As can be seen in particular in FIG. 2, the rear surface 45 of the extension 21 can be oriented toward the front end 71 of the joint 70. The back surface 45, the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 can at least partially delimit a receiving space 5. This receiving space 5 can preferably form a soldering gap and / or adhesive gap which receives soldering material and / or an adhesive.As already explained above, the side surfaces 22, 52 of the first and second hard material elements 20, 50 can have bulges 29, 57. This can result in a curvilinear, preferably arched, course of the joint 70, in particular of the central longitudinal line 72 of the joint 70, as can be seen in the figures. Such a curvilinear course of the butt joint 70 may provide greater resistance to flow of soil material along the butt joint 70 than a rectilinear course. In particular, a probability that the joint 70 is completely aligned along a preferred flow direction of the processed soil material over the soil processing tool 1 is almost zero due to a curvilinear course.If, as illustrated in the present case and already indicated above, the shoulder 21 is provided in the front half of the longitudinal extent 27 of the first hard material element 20 measured in the working direction AR with respect to the working direction AR, preferably as within the front 40% of the longitudinal extent 27, a compact structure and a particularly good support of the first hard material element 20 results. In particular, the region of the first hard material element 20 which lies on the rear side of the shoulder 21 in the working direction AR can preferably be supported at least almost completely on the base body 10. The second hard material element 50 can be extended as far as the vicinity of the projection 21 in the direction of the tip 2, so that at the first hard material element 20 at most a small protrusion over the base body 10 in the working direction AR is required.As also discussed above, the domes 29, 57 may have large radii of curvature 30, 58. An advantage of large radii of curvature 30, 58 is that machining of the first receiving surface 11 and the second receiving surface 12 can be simplified. Thus, despite the bulges 29, 57 of the side surfaces 22, 52, a straight joint 15 (see FIG. 11 ) can be provided between the first receiving surface 11 and the second receiving surface 12. Due to the large radii of curvature 30, 58, only a slight geometric deviation of the support surfaces 24.1, 55 of the first and second hard material elements 20, 50 from the receiving surfaces 11, 12 results, so that a large-area support is achieved despite simplified machining of the same.A further advantage of large radii of curvature 30, 58 is that this increases a design clearance when selecting the working angle 4 or the tip angle 6 of the soil working tool 1. This advantage is particularly clear with reference to FIGS. 12 and 13. In FIG. 12 a first soil working tool 1 can be seen which has a first working angle 4. In the region of the tip, a first hard material element 20 is arranged and adjacent to the latter, a second hard material element 50 is arranged on each side. The advantageous configuration of the first and second hard material elements 20, 50, in particular the large radii of curvature 30, 58, makes it possible to use first and second hard material elements 20, 50 unchanged, likewise with a second soil working tool 1' which has a second working angle 4' which is changed with respect to the first soil working tool 1. Such a second soil working tool 1' is shown in FIG. 13. Thus, in the production of soil working tools 1, first and second hard material elements 20, 50 can be used as identical parts if soil working tools 1, 1' with different working angles 4, 4' are to be produced, in particular if different base bodies 10 are used.In principle, these advantages can also result to a lesser extent if one or both of the radii of curvature 30, 58 is / are infinitely large, i.e. the side surfaces 22, 52 are not arched. However, the inventors have recognized that a finite radius of curvature, which corresponds in particular at most to twice the joint length 74, on the one hand allows a greater variability in the selection of the working angle 4. On the other hand, a curvature of the side surfaces 22, 52 provided as a result results in a reduced risk of breakage for the first and the second hard material element 20, 50.A configuration according to the invention of the first and second hard material elements 20, 50 enables a method for producing at least two floor processing tools 1, 1' which comprises, for a first floor processing tool 1 and a second floor processing tool 1', in each case a step of providing at least one base body 10, 10', a step of applying the first hard material element 20 to the first receiving surface 11 provided on the base body 10, 10', a step of applying the second hard material element 50 to the second receiving surface 12 provided on the base body 10, 10', and a step of connecting the first and second hard material elements 20, 50 to the base body 10, 10', in particular a cohesive connection, preferably a soldered connection and / or an adhesive connection.It is also possible here for a first base body 10 of the first soil working tool 1, which has a first working angle 4 between the working edge 3 and the working direction AR, to be fitted with first and second hard material elements 20, 50 of a first geometric configuration, and for a second base body 10' of the second soil working tool 1', which has a second working angle 4' between the working edge 3 and the working direction AR, which second base body differs from the first working angle 4, to be fitted with first and second hard material elements 20, 50 of the same geometric configuration, namely the first geometric configuration.The inventors have furthermore recognized that, by the configuration according to the invention of the first and second hard material elements 20, 50, a configuration range in the selection of an angle of attack 8 (see FIG. 14 ) and of the bending angle 7 of the soil working tool 1 is also increased.The angle of attack 8 can be an angle which the first, second and / or third receiving surface 11, 12, 18 and / or the upper side 23, 53, 83 of the first, second and / or third hard material element 20, 50, 80 assumes with respect to the base body 10, in particular with respect to the surface 19 of the base body, in a section along the central longitudinal plane 47 of the first hard material element 20 or perpendicular to the working edge 3.The inventors have namely recognized that the advantages of the design according to the invention of the first and second hard material elements 20, 50 are also achieved, and in particular when the side surfaces 22, 52 of the first and second hard material elements 20, 50 are not necessarily designed to correspond exactly.A configuration according to the invention of the first and second hard material elements 20, 50 thus also enables a method for producing at least two soil working tools 1, 1', wherein a first base body 10 of the first soil working tool 1, which has a first bending angle 7, is equipped with first and second hard material elements 20, 50 of a first geometric configuration, and wherein a second base body 10' of the second soil working tool 1', which has a second bending angle 7 deviating from the first bending angle 7, is equipped with first and second hard material elements 20, 50 of the same geometric configuration, namely the first geometric configuration.By means of a configuration according to the invention of the first and second hard material elements 20, 50, additionally or alternatively a method for producing at least two soil working tools 1, 1' is also made possible, wherein a first base body 10 of the first soil working tool 1, which has a first angle of attack 8, is equipped with first and second hard material elements 20, 50 of a first geometric configuration, and wherein a second base body 10' of the second soil working tool 1', which has a second angle of attack 8 deviating from the first angle of attack 8, is equipped with first and second hard material elements 20, 50 of the same geometric configuration, namely the first geometric configuration.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 3 289 845 B1

[0003] DE 10 2019 106 393 A1

[0004] EP 3 959 953 A1

[0005]

Claims

Soil working tool (1), in particular a blade (a fan's foot, a chopping or a wing blade), for working soil material in a working direction (AR), wherein the soil working tool (1) has a tip (2) in a region which is at the front in the working direction (AR), wherein at least one working edge (3) is provided which is aligned at a working angle (4) to the working direction (AR) and runs towards the tip (2), wherein the soil working tool (1) has a base body (10), wherein a first hard material element (20) is provided on the base body (10) in the region of the tip (2), wherein a second hard material element (50) is provided on the base body (10) in the region of the working edge (3), wherein a joint (70) is formed between a side surface (52) of the second hard material element (50) and a side surface (22) of the first hard material element (20), characterized in that a front end (71) of the joint (70), which is arranged in the region of the working edge (3) and is oriented with respect to the working direction (AR), is covered by the first hard material element (20) and / or the second hard material element (50), as viewed along a central longitudinal line (72) of the joint (70).Soil working tool according to Claim 1, characterized in that the front end (71) of the butt joint (70) is covered over an entire joint height (73) of the butt joint (70).Soil working tool (1) according to Claim 1 or 2, characterized in that, viewed in projection onto a central square plane (59) of the second hard material element (50), the second hard material element (50) tapers at an acute angle in the region of a front corner (61) with respect to the working direction (AR), and in that the front corner (61) is at least partially covered by the covering of the front end (71) of the butt joint (70).Soil working tool according to one of Claims 1 to 3, characterized in that the first hard material element (20) and / or the second hard material element (50) have / has a shoulder (21) in the region of the front end (71) of the joint (70), wherein the overlapping of the front end (71) of the joint (70) is achieved at least partially by means of the shoulder (21).Soil working tool according to Claim 4, characterized in that the shoulder (21) is provided in a front half, with respect to the working direction (AR), of a longitudinal extent (27), measured in the working direction (AR), of the first hard material element (20), preferably within the front 40% of the longitudinal extent (27).Soil working tool (1) according to Claim 4 or 5, characterized in that the shoulder (21) projects beyond the side face (22) of the first hard material element (20) in the direction of a transverse extent (28) of the first hard material element (20), measured transversely to the working direction and parallel to a central transverse plane of the first hard material element (20), wherein the transverse extent (28) of the first hard material element (20) preferably has its maximum value in the region of the shoulder (21).Soil working tool (1) according to one of Claims 4 to 6, characterized in that the shoulder (21) is provided with a rear surface (45) which points counter to the working direction (AR) and which adjoins the side surface (22) indirectly or directly, and in that the side surface (22) of the first hard material element (20), the rear surface (45) and that of the side surface (52) of the second hard material element (50) at least partially delimits a receiving space (5), wherein the receiving space (5) in particular forms a soldering gap and / or adhesive gap.Soil working tool according to one of Claims 1 to 7, characterized in that the side face (22) of the first hard material element (20), in the region of the joint (70), viewed in projection onto the / a centre surface (46) of the first hard material element (20), has a convex curvature (29) at least in regions.Soil working tool according to one of Claims 1 to 8, characterized in that the side face (52) of the second hard material element (50) has, in the region of the joint (70), a concave curvature (57), at least in regions, as viewed in projection onto the / a centre surface (59) of the second hard material element (50).Soil working tool according to one of Claims 1 to 9, characterized in that, viewed in projection onto the / a central square plane (46) of the first hard material element (20), a radius of curvature (30) of the side face (22) of the first hard material element (20), and / or, viewed in projection onto the / a central square plane (59) of the second hard material element (50), a radius of curvature (58) of the side face (52) of the second hard material element (50) is, on average, at least 75% of a joint length (74) of the joint (70) measured along the central longitudinal line (72) of the joint (70), preferably corresponds, on average, to at least the joint length (74).Soil working tool according to one of Claims 1 to 10, characterized in that the first hard material element (20) has, on its underside (24), a bearing surface (24.1) which is directed towards the base body (10) and is intended for at least partial support on a first receiving surface (11) of the base body (10), in that a thickening (37) which projects beyond the bearing surface (24.1) is provided adjoining the bearing surface (24.1), in a region (25) which is front with respect to the working direction (AR), and in that the / one shoulder (21) is provided in the region of the thickening (37) and / or of the / one transition (38) between the bearing surface (24.1) and the thickening (37).Soil working tool according to one of Claims 1 to 11, characterized in that the first hard material element (20) has, on its underside (24), a bearing surface (24.1) which is directed towards the base body (10) and is intended for at least partial support on a first receiving surface (11) of the base body (10), in that a thickening (37) which projects beyond the bearing surface (24.1) is provided adjoining the bearing surface (24.1), in a region (25) which is front with respect to the working direction (AR), wherein a guide surface (39) which is at an angle to the bearing surface (24.1) is provided in the transition (38) between the bearing surface (24.1) and the thickening (37), and wherein the guide surface (39) is supported on a counter-guide surface (13) of the base body (10).Soil working tool according to one of Claims 1 to 12, characterized in that the first hard material element (20) has a cutting region (31) in a / its region (25) which is front in the working direction (AR), the cutting region (31) having a convexly curved curvature section (32), as viewed in projection onto the / a centre square plane (46) of the first hard material element (20), the curvature section (32) being followed, counter to the working direction (AR), by a side section (33) of the cutting region (31) which is oriented at an angle to the working direction (AR) and, as viewed in projection onto the centre square plane (46) of the first hard material element (20), is preferably of rectilinear design.Soil working tool according to Claim 13, characterized in that, viewed counter to the working direction (AR), a transverse extent (28), measured transversely to the working direction (AR), of the first hard material element (20) is enlarged by the course of the curved section (32) and of the side section (33), in that the side section (33), viewed counter to the working direction (AR), ends in the / one shoulder (21), and in that, following the shoulder (21) counter to the working direction (AR), the side face (22) of the first hard material element (20) adjoins indirectly or directly.Method for producing at least two ground-working tools (1, 1') according to one of the preceding claims, which comprises the following steps in each case for a first ground-working tool (1) and a second ground-working tool (1'): - providing at least one base body (10, 10'); - applying the first hard material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connecting the first and second hard material elements (20, 50) to the base body (10, 10'), in particular a cohesive connection, preferably a soldered connection and / or an adhesive connection; characterized in that a first base body (10) of the first soil working tool (1), which has a first working angle (4) between the working edge (3) and the working direction (AR), is equipped with first and second hard material elements (20, 50) of a first geometric configuration, and in that a second base body (10') of the second soil working tool (1'), which has a second working angle (4') between the working edge (3) and the working direction (AR), which second working angle differs from the first working angle (4), is equipped with first and second hard material elements (20, 50) of the same geometric configuration, namely the first geometric configuration.Method for producing at least two ground-working tools (1, 1') according to one of the preceding claims, which comprises the following steps in each case for a first ground-working tool (1) and a second ground-working tool (1'): - providing at least one base body (10, 10'); - applying the first hard material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connecting the first and second hard material elements (20, 50) to the base body (10, 10'), in particular a cohesive connection, preferably a soldered connection and / or an adhesive connection; characterized in that a first base body (10) of the first soil working tool (1) which has a first bending angle (7) is equipped with first and second hard material elements (20, 50) of a first geometric configuration, and in that a second base body (10') of the second soil working tool (1') which has a second bending angle deviating from the first bending angle (7) is equipped with first and second hard material elements (20, 50) of the same geometric configuration, namely of the first geometric configuration, wherein a bending angle is formed in particular between projections of opposite working edges (3) or between projections of upper and / or lower sides of the base body in the region of opposite wings (9) on a surface which is perpendicular to the working direction (AR).Method for producing at least two ground-working tools (1, 1') according to one of the preceding claims, which comprises the following steps for a first ground-working tool (1) and a second ground-working tool (1') in each case: - providing at least one base body (10, 10'); - applying the first hard-material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard-material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connecting the first and second hard-material elements (20, 50) to the base body (10, 10'), in particular a cohesive connection, preferably a soldered connection and / or an adhesive connection; characterized in that a first base body (10) of the first soil working tool (1) which has a first angle of attack (8) is equipped with first and second hard material elements (20, 50) of a first geometric configuration, and in that a second base body (10') of the second soil working tool (1') which has a second angle of attack deviating from the first angle of attack (8) is equipped with first and second hard material elements (20, 50) of the same geometric configuration, namely of the first geometric configuration, wherein an angle of attack is in particular an angle which a receiving surface (11, 18) for a first and / or second hard material element (20, 50) encloses in a section perpendicular to the orientation of the working edge (3) with an upper side and / or lower side of the base body in an adjacent region outside the receiving surface (11, 18).

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