Workpiece with a machining surface and a coating surface, and method for manufacturing the workpiece

Abstract

Workpiece (10), wherein the workpiece (10) comprises a main body section (12); and a coating material (14) applied to the main body section (12), wherein the main body section (12) comprises a mechanically machined surface (22); a coating surface (18) arranged across a boundary next to the machined surface (22), onto which the coating material (14) has been applied; and a recess (26) formed in the main body section such that it extends at the boundary between the machined surface (22) and the coating surface (18) towards the interior of the main body section (12), wherein the recess (26) extends along the boundary in such a way as to separate the machined surface (22) and the coating surface (18) from each other, wherein the machined surface (22) is free of the coating material (14).

Description

General state of the art; Field of invention

[0001] The present invention relates to a workpiece with a machining surface and a coating surface, and to a method for manufacturing the workpiece. Description of the state of the art

[0002] Stators of rotating electric motors are known (for example, patent disclosure 2013-236430). Such a stator can comprise components (a stator housing, a flange element, or the like) that have a machining surface, which is machined by a lathe or the like, and a coating surface, onto which a coating material is applied (for example, the outer circumferential surface).

[0003] Up to now, when a machining surface located next to a coating surface is mechanically processed after the coating surface has been coated, the coating material of the coating surface sometimes detaches. Brief description of the invention

[0004] In one embodiment of the present disclosure, a workpiece comprises a main body section and a coating material applied to the main body section, wherein the main body section has a machined surface; a coating surface arranged across a boundary adjacent to the machined surface, onto which the coating material has been applied; and a depression formed in the main body section such that it extends towards the interior of the main body section at the boundary between the machined surface and the coating surface, the depression extending along the boundary in such a way as to separate the machined surface and the coating surface from each other.

[0005] Since the coating surface and the processing surface are separated from each other by the recess according to the present disclosure, when the processing surface next to the coating surface is mechanically processed after the coating surface has been coated, only the coating material on the surface of the recess is removed, and it can be prevented that the coating material on the coating surface is removed. List of characters Fig. Figure 1 is an oblique view of a workpiece seen from the front according to one embodiment. Fig. 2 is an oblique view from behind of the in Fig. 1 of the workpiece shown. Fig. 3 is a side view of the in Fig. 1 of the workpiece shown. Fig. Figure 4 is an enlarged cross-sectional view of the area. IV in Fig. 3. Fig. 5 is a flowchart that provides an example of the process for producing the in Fig. 1 shows the workpiece shown. Fig. 6 is a rear-view oblique view of the base material of the in Fig. 1 of the workpiece shown. Fig. 7 is a view explaining step S2 in Fig. 5 and a Fig. 4 corresponding enlarged sectional view. Fig. Figure 8 shows the state at the time of completion of step 1 S2 in Fig. 5. Fig. 9 is an enlarged sectional view of the step S4 in Fig. 5 manufactured structural components. Fig. Figure 10 is an enlarged sectional view of a main body section according to another embodiment. Fig. Figure 11 is an enlarged sectional view of a main body section according to yet another embodiment. Fig. Figure 12 is an enlarged sectional view of a main body section according to yet another embodiment. Fig. Figure 13 is an enlarged sectional view of a main body section according to yet another embodiment. Fig. Figure 14 is an enlarged sectional view of a main body section according to yet another embodiment. Fig. Figure 15 is an enlarged sectional view of a main body section according to yet another embodiment. Fig. Figure 16 is an enlarged sectional view of a superstructure of workpieces according to another embodiment. Fig. Figure 17 is an enlarged sectional view of a superstructure of workpieces according to yet another embodiment. Fig. Figure 18 is an enlarged sectional view of a workpiece according to another embodiment. Detailed explanation

[0006] The following are detailed explanations of embodiments of the present disclosure based on the drawings. In the various embodiments explained below, identical elements are designated with the same reference numerals, and repetition of the explanation is omitted. Furthermore, the following explanation includes a line along the central axis. O of workpieces 10 and 50 Direction of travel shown as axis direction, the radial direction of a circle with this axis line O The center is shown as the radial direction, and the circumferential direction of this circle is shown as the circumferential direction. Furthermore, for convenience, the direction of the axis leading to the left side of the drawing sheet is referred to as the front axis direction.

[0007] First, with reference to Fig. 1 to Fig. 4 a workpiece 10 explained according to one embodiment. The workpiece10 For example, the stator housing of the stator of an electric motor is fitted with a workpiece. 50 coupled. The workpiece 10 includes a main body section 12 and a coating material 14 The main body section 12 is a tubular element with the central axis line O , and is made, for example, of a metal (iron, aluminum, or the like).

[0008] The main body section 12 has an inner circumferential surface 16 , one on the inner circumferential surface 16 coating surface positioned on the opposite side 18 , an end surface 20 on one front side in the axial direction, one on the side facing this end surface 20 processing area positioned on the opposite side 22 , and one at the edge of the processing area 22 and the coating surface 18educated in-depth study 26 on. The inner circumferential surface 16 is a ring surface that follows the axis line O surrounds, and defines a passage opening that connects the central area of ​​the main body section. 12 penetrates in the axial direction.

[0009] The coating surface 18 is an approximately octagonal tubular surface viewed from the axis direction, which is arranged so that it follows the axis line O surrounding, is beyond a boundary next to the processing area 22 arranged, and defines the outer circumferential surface of the main body section 12 on the side opposite the inner circumferential surface. The end surface 20 and the processing area 22 run parallel to each other between the inner circumferential surface 16 and the coating surface 18 .

[0010] In the present embodiment, the end surface20 and the processing area 18 approximately orthogonal to the coating surface 18 (or the axis line) O In other words, they intersect an imaginary extension surface, for which the processing surface 22 extended outwards in the radial direction, and an imaginary extension area for which the coating area 18 extended backwards in the axial direction at an angle of 90°. The machining surface 22 defines a rear end face of the main body section in the axial direction 12 at the end surface 20 opposite side. The processing area 22 is a surface that has been mechanically machined using a machine tool such as a lathe, a milling machine or a machining tool.

[0011] The in-depth 26 is at the edge of the processing area 22and the coating surface 18 so in the main body section 12 formed so that they separated from the processing area 22 and the coating surface 18 to the interior of the main body section 12 in-depth. Specifically, the in-depth study is 26 as in Fig. 4 shown by a first surface 28 , extending from the rear end in the axial direction of the coating surface 18 running inwards in the radial direction, and one attached to the first surface 28 subsequent second area 30 , extending from the outer end in the radial direction of the machining surface 22 defined as running forward in the axial direction.

[0012] The first area 28 surrounds the axis line O and is one of the axis lines O orthogonal ring-shaped surface, and the second surface 30 is a cylindrical surface that follows the axis line Osurrounds. The first area 28 and the second area 30 They intersect each other at a 90° angle (that is, they are orthogonal to each other). This depression 26 extends along the boundary of the coating surface 18 and the processing area 22 in the circumferential direction and separates the coating surface 18 and the processing area 22 from each other. The technical significance of this deepening 26 will be described later.

[0013] The coating material 14 is on the coating surface 18 of the main body section 12 applied. This coating material 14 is for improving the beauty of the workpiece's appearance 10 and to protect the coating surface 18 Formed to prevent rust. If the coating material 14Being black can also improve the workpiece's ability to radiate heat. 10 through the coating material 14 are produced. In the present embodiment, the coating material is 14 also on the first area 28 the in-depth 26 upset.

[0014] The workpiece 50 For example, it is a flange element that is fixed to the end region in the axial direction of the stator housing of the electric motor and is made of a metal or similar material. Specifically, the workpiece is... 50 a tubular element with the central axis line O as center, and it has a base plate 52 , a first approach 54 , which is from an end surface 64 on the front side in the axial direction of this base plate 52 protrudes forward in the axial direction, and a second approach 62 , which is from an end surface56 on the front side in the axial direction of this first approach 54 protrudes forward in the axial direction.

[0015] The base plate 52 the end surface 64 , a rear end face in the axial direction 66 at the end surface leading to this end surface 64 opposite side, and an outer circumferential surface 68 , which are located between the end surface 64 and the end surface 66 extends onto. The end surfaces 64 and 66 are arranged parallel to each other and intersect the outer circumferential surface 68 (or the axis line) O The outer circumferential surface 68 is like the coating surface described above 18 a tubular surface that is approximately octagonal when viewed from the axial direction.

[0016] In a central area of ​​the second approach 62 is a through-opening 70formed, and in a central area of ​​the base plate 52 and the first approach 54 is an opening 72 ( Fig. 2) formed, extending from the end surface 66 the base plate 52 recessed forward in the axial direction. In the present embodiment, the end surfaces 64 the base plate 52 , the outer circumferential surface 74 and the end surface 56 on the front side in the axial direction of the first approach 54 , and the outer circumferential surface 78 of the second approach 62 as well as the processing area described above 22 mechanically machined surfaces.

[0017] The workpiece 50 This is how the workpiece is treated 10 coupled so that it is connected to the workpiece 10 is concentric. If the workpieces 10 and 50 coupled together, are the first approach 54and the second approach 62 into the inner circumferential surface 16 of the workpiece 10 A defined through-opening was inserted. The processing surface is positioned accordingly. 22 of the workpiece 10 and the end surface 64 of the workpiece 50 their inner circumferential surfaces lie opposite each other in surface contact. 16 of the workpiece 10 and the outer circumferential surface 74 of the first approach 54 of the workpiece 50 opposite each other (or touching each other).

[0018] Next, with reference to Fig. 5 to Fig. 9 the process for manufacturing the workpiece 10 explained. With reference to Fig. The manufacturer prepares step 5. S1 a basic material 12' ( Fig. 6) for the main body section 12 before. For example, the base material 12'manufactured by die casting. As in Fig. The base material shown in section 6 12' virtually the same external shape as the main body section described above 12 and it has the inner circumferential surface 16 , the coating surface 18 , the end surface 20 , an area that has not yet been worked 22' and those on the border between this uncultivated area 22' and the coating surface 18 educated in-depth study 26 The area that has not yet been worked 22' is an area that is part of the processing area 22 corresponds to a raw surface that has not been mechanically processed. The coating surface 18 is across the border next to the uncultivated area 22' arranged.

[0019] Alternatively, the manufacturer can take this step S1 first, a base material that forms the inner circumferential surface 16, the coating surface 18 , the end surface 20 and the area that has not yet been worked 22' exhibits, but no indentation 26 has, prepare and then mechanically process this base material and deepen the depression 26 form and thereby the in Fig. 6 basic materials shown 12' produce.

[0020] In step S2 The manufacturer applies a coating material to the coating surface. 18 Specifically, the manufacturer, as in Fig. 7 shows first a mask element 100 in the end area on the outside in the radial direction of the unworked surface 22' one. This mask material 100 It serves to protect the area that has not yet been worked. 22' before the coating material. The mask material 100 It can also be formed in such a way that it covers the entire unprocessed area. 22' covers.

[0021] The manufacturer then specifies a coating material application device (a spray gun). 102 so in relation to the coating area 18 that an ejection axis A of the coating material application device 102 ejected coating material the coating surface 18 intersects (for example, runs orthogonally to it). Then the manufacturer operates the coating material application device. 102 , whereby the liquid coating material reaches the coating surface 18 is ejected and the coating surface 18 is coated.

[0022] As an example, the manufacturer applies the coating material through the coating material application device. 102 from the front end in the axial direction of the coating surface 18 towards the rear end in the axial direction. This coating process allows the coating material to... 14not only on the coating surface 18 , but also on the first surface 28 and the second area 30 the in-depth 26 be applied. Fig. Figure 8 shows the state in which the mask material is 100 after the coating material has been applied 14 was removed.

[0023] With renewed reference to Fig. The manufacturer takes step 5. S3 mechanical processing of the unprocessed area 22' of the base material 12' For example, the manufacturer uses a machine tool to perform a cutting operation on the unmachined surface. 22' from the inner end edge in a radial direction towards the outer end edge. The result is the machining surface described above. 22formed. If, during this machining process, the tool of the machine tool moves the outer end edge in the radial direction of the unmachined surface 22' Once it has reached the desired position, the tool can be used with the rear end. 14a in the axial direction of the second surface 30 applied coating material 14 come into contact and exert a force in the radial outward direction. This allows the coating material to... 14 on the second area 30 with the rear end 14a as a starting point in the radial direction outwards from the second surface 30 be replaced.

[0024] Since, in the present embodiment, the coating surface 18 and the processing area 22 through the deepening 26 If they are separated, the peeling of the coating material caused by the tool can be prevented. 14up to the coating material 14 on the coating surface 18 progresses. Specifically, it is created as in Fig. Figure 8 shows the application of a force in the radial outward direction through the tool to the rear end. 14a of the coating material 14 in the area connected by the first surface 28 and the second area 30 formed bending area P of the coating material 14 a stress concentration and the coating material 14 in this bending area P slightly fragile.

[0025] As a result, despite the force being applied in the radial direction outwards towards the rear end 14a of the coating material 14 through contact with the tool as in Fig. 4 shows only the coating material 14 on the second area 30detaches and can prevent detachment down to the coating material 14 on the coating surface 18 progresses. Consequently, the applied coating material can 14 throughout the entire area of ​​the coating surface 18 to be protected. In this way, the workpiece described above will be protected. 10 manufactured.

[0026] After the workpiece has been manufactured 10 The manufacturer produces the finished product from the workpieces. 10 and 50 a structural body 140 Specifically, the manufacturer couples the workpiece. 10 and the workpiece 50 so that together, as in Fig. Figure 9 shows the processing area 22 of the workpiece 10 and the end surface 64 the base plate 52 of the workpiece 50 are in surface contact. Since this is the processing area. 22 and the end surface 64Because they are mechanically machined, they adhere tightly to each other.

[0027] As described above, in the present embodiment, step S3 not leading to the coating material peeling off 14 on the coating surface 18 In other words, the area where the coating material is applied 14 by performing step S3 can be replaced within the area of ​​the width W the in-depth 26 limited in the axial direction. Therefore, the beauty of the coating surface cannot be fully appreciated. 18 The applied coating will be increased. The width W the depression that corresponds to the area where the coating material 14 by performing step S3 can be removed, corresponds to the aspect of the beauty of the coating of the coating layer. 18taking into account the thickness of the coating material 18 or the like, set to the smallest possible value (for example, a maximum of 1 mm).

[0028] Since the first area 28 and the second area 30 the in-depth 26 Since the lines run orthogonally to each other in the present embodiment, the stress concentration can be in the bending area. P can be effectively produced and the coating material can be used 14 in the bending area P in the event of the coating material detaching 14 on the second area 30 The material can be reliably broken in the radial direction outwards. Consequently, the peeling process cannot progress further, even down to the coating material. 14 on the coating surface 18 can be effectively prevented.

[0029] For further study 26There are various modifications to prevent the coating from peeling off. Referring to Fig. 10 to Fig. 14. Variations of the deepening are described below. 26 be explained. In the Fig. 10 main body sections shown 12A is a deepening 110 through a first area 112 , which are from the coating surface 28 running inwards in the radial direction, and one attached to the first surface 112 subsequent second area 114 , which are from the processing area 22 The second surface is defined as extending forward in the axial direction. 114 This is in relation to the processing area. 22 inclined to be flush with the processing surface 22 an angle θ1 (> 90°) forms, thereby creating the first surface 112 and the second area 114 are connected to each other in such a way that they form the angle θ1 , which is an acute angle.

[0030] In the example that is in Fig. As shown in 10, the step described above can be used. S3 the stress concentration in the bending area of ​​the coating material 14 , which is in the connection area 115 the first area 112 and the second area 114 The formation of the coating material can be triggered even more effectively. Consequently, the progression of the peeling process can progress to the coating material itself. 14 on the coating surface 18 in step S3 can be prevented even more effectively.

[0031] At the in Fig. 11 main body section shown 12C is a deepening 116 through a first area 118 , which are from the coating surface 18 inwards in the radial direction, and a second surface 120 , which are attached to the first surface 118connects and from the processing area 22 running forward in the axial direction, is defined. The first surface 118 This is the case with regard to the coating area. 118 inclined to be flush with the coating surface 18 an angle θ2 (> 90°) forms, thereby creating the first surface 118 and the second area 120 are connected to each other in such a way that they form the angle θ2 , which is an acute angle.

[0032] In the example that is in Fig. As shown in 11, it can be seen as in the one in Fig. 10 examples shown in the step described above S3 the stress concentration in the bending area of ​​the coating material 14 , which is in the connection area 121 the first area 118 and the second area 120The formation of the coating material can be triggered even more effectively. Consequently, the progression of the peeling process can progress to the coating material itself. 14 on the coating surface 18 can be prevented even more effectively.

[0033] Furthermore, in the example that is in Fig. As shown in 11, the first area 118 inclined so that they follow the contour of the coating surface 18 towards the inside in the radial direction towards the axis, thus creating the depression 116 is formed in such a way that it extends further than the rear end 18a in the axial direction of the coating surface 18 recessed forward in the axial direction. Because of this design, the amount of material on the first surface 118 adhering coating material when the coating material is applied to the coating surface in a radially inward direction 18 in step S2The progression of delamination can be limited to the coating material. 14 on the coating surface 18 This will make things more difficult.

[0034] At the in Fig. 12 main body section shown 12D is a deepening 122 defined by a curved surface (for example, the surface of a circular arc). Since, in this example as well, the coating surface 18 and the processing area 22 through the deepening 122 Since they can be separated from each other, the progression of the peeling process can continue until it reaches the coating material. 14 on the coating surface 18 in step S3 This will make things more difficult.

[0035] At the in Fig. 13 main body section shown 12E is at the edge of the coating surface 18 and the processing area 22 a deeper 124 formed and shows this depth 124a first in-depth 130 and one between this first deepening 134 and the coating surface 18 arranged second depression 136 up. The first in-depth study 130 is through a first area 126 and a second area 128 defined. The first area 126 extends from the processing area 22 forwards in the axial direction and meets the second surface at a right angle in the axial direction at its front end 128 .

[0036] The second in-depth 136 is through a third area 132 and a fourth area 134 defined. The third area 132 extends from the coating surface 18 inwards in the radial direction and meets the fourth surface at a right angle in the radial direction at its inner end 134 Furthermore, the second area 128 and the fourth area134 orthogonal to each other. In this way, the coating surfaces are 18 and the processing area 22 in the example that is in Fig. Figure 13 shows the two depressions 130 and 136 existing deepening 124 separated from each other.

[0037] This execution results in the step described above. S3 in a first bending area of ​​the coating material 14 , which is in a connecting area 138 the areas 126 and 128 is formed in a second bending area of ​​the coating material 14 , which is in a connecting area 139 the areas 128 and 134 is formed, and in a third bending area of ​​the coating material 14 , which is in a connecting area 142 the areas 132 and 134This creates a stress concentration, and the coating material is prone to breakage in the bending areas at these three points. 14 Therefore, the peeling process can progress as far as the coating material. 14 on the coating surface 18 can be prevented even more effectively.

[0038] At the in Fig. 14 main body section shown 12F is at the edge of the coating surface 18 and the processing area 22 a deeper 144 formed and shows this depth 144 a first in-depth 146 and one between this first deepening 146 and the coating surface 18 arranged second depression 148 up. The first in-depth study 146 and the second deepening 148 are each defined by a curved surface (for example, the surface of a circular arc). In the example given in Fig. As shown in 14, the progression of the peeling process can extend to the coating material. 14 on the coating surface in the step described above S3 This will make things more difficult.

[0039] The in Fig. 15 main body sections shown 15G indicates, in addition to the area defined by the first surface 28 and the second area 30 defined depth 26 further in-depth 150 on, which is so in the main body section 12G is formed in such a way that it separates from the second surface 30 The depression is recessed inwards in a radial direction. 150 is through the first surface 28 , a third area 152 and a fourth area 154 defined.

[0040] The third area 152 extends from the inner end in the radial direction of the first surface 28 in the axial direction to the rear and runs to the first surface28 orthogonal. The fourth surface 154 extends from the front end in the axial direction of the second surface 30 in the radial direction inwards, so that they form the first surface 28 opposite (specifically, running parallel to it), and meets the third surface at a right angle in the radial direction at its inner end. 152 The in-depth study 150 can be formed in such a way that it resembles the deepening 26 along the entire area of ​​the boundary of the coating surface 18 and the processing area 22 (that is, the entire circumference of the main body section) 12G) extends. Or there can also be several depressions. 150 along the depression 26 be set up next to each other at certain intervals.

[0041] In the example that is in Fig. As shown in Figure 15, the coating material penetrates during the application of the coating material in the step described above. S2 into the interior of the depression 150 one. If then, at the step described above S3 The tool exerts a force in the radial direction outwards on the coating material. 14 on the second area 30 When exercised, an interaction occurs between the coating material 14 on the second area 30 and into the depth 150 intruded coating material 14 , which is located on the surfaces 152 and 154 the in-depth 150 adheres, (that is, at the position of the connection area) 156 the areas 30 and 154 ) easily leads to a concentration of stress. As a result, the delamination can progress to the coating material. 14 on the coating surface 18can be prevented even more effectively.

[0042] The in-depth 150 can also be defined by a curved surface.

[0043] At the in Fig. 9 shown structural elements 140 can also be explored in greater depth 26 a sealing material is formed. Such a design is in Fig. 16 shown. At one in Fig. 16 shown structural elements 140B is in the in-depth 26 a ring-shaped sealing material 158 arranged. The sealing material 158 extends in the circumferential direction in such a way that it follows the axis line O ( Fig. 1) the workpieces 10 and 50 surrounds, and seals the space between the processing surface 22 of the workpiece 10 and the end surface 64 of the workpiece 50This prevents the ingress of foreign materials such as cutting fluid or the like from the area between the machining surface. 22 and the end surface 64 be prevented.

[0044] The sealing material 158 can one from the deepening 26 removable and from the workpieces 10 and 50 It will be an independent, ring-shaped element. In this case, the sealing material will be... 158 made from a flexible material such as rubber, and the sealing material 158 by the manufacturer after coupling the workpieces 10 and 50 into the interior of the depression 26 used. Or the sealing material. 158 can also from one into the depth 26 The filled filling material is formed. In this case, the sealing material is used. 158formed from an adhesive, a rubber, a hardening resin or the like, and becomes the sealing material 158 by the manufacturer after coupling the workpieces 10 and 50 into the interior of the depression 26 filled.

[0045] The in-depth 26 , 110 , 116 , 122 , 124 , 144 and 150 To prevent the coating from peeling off, a boundary can be formed at any interface between a machined surface and a coated surface. For example, the outer circumferential surface 68 the base plate 52 of the workpiece 50 as a coating surface that is coated and at the boundary between this outer circumferential surface 68 and the end surface 64 the base plate 52 a depression is formed. Such a design is in Fig. 17 shown.

[0046] In a structural body 140C , who in Fig. As shown in 17, the workpiece 50B a main body section 170 with the same shape as that of the workpiece described above 50 and a coating material 160 , which is applied to the coating surface (outer circumferential surface) 68 a base plate 52B of the main body section 170 was applied. Furthermore, at the edge of the coating surface... 68 of the main body section 170 and the processing area (end surface) 64 a deeper 162 , which extend from the coating surface 68 and the processing area 64 to the interior of the main body section 170 deepened, educated. The deepening 162 is through a first area 164 , extending from the front end in the axial direction of the coating surface 68inwards in the radial direction, and a second surface 166 , extending from the outer end in the radial direction of the machining surface 64 extending backwards in the axial direction and to the first surface 164 It runs orthogonally, defined.

[0047] The workpiece 50B can do that in Fig. The process shown in step 5 is carried out as follows. Specifically, in step 5, the following steps are taken: S1 a base material (not shown) of the main body section 170 prepared and in step S2 the coating material 160 on the coating surface 68 of the main body section 170 applied. Then in step S3 the processing area 64 corresponding unprocessed area of ​​the base material of the main body section 170 mechanically machined and the machining surface 64 educated.

[0048] In this way the workpiece can 50B to be produced. In step S3 the production of the workpiece 50B can be achieved through deepening 162 even when a force is exerted in the radial direction outwards by the tool of the machine tool on the coating material on the second surface 166 a peeling of the coating material 160 on the coating surface 68 be prevented.

[0049] For further study 162 The design of the depression described above can also be 110 , 116 , 122 , 124 , 144 or 150 can be applied. Furthermore, the building block can be used 140C also a sealing material inside the recesses 26 and 162 be arranged and the space between the processing surfaces 22 and 64 be sealed by the sealing material.

[0050] Furthermore, it is possible that the machining surface and the coating surface do not meet at right angles, but rather intersect in such a way that they form an acute or an obtuse angle. Such a design is found in Fig. 18 shown. In the case of a workpiece 10B , which in Fig. As shown in 18, a main body section 12H a coating surface 165 on, which cross a boundary next to the processing area 22 is arranged. This coating surface 168 has a first surface parallel to the axis direction 168A and one in relation to the first area 168A inclined second surface 168B on.

[0051] The in-depth 26 is at the border of the second area 168B and the processing area 22 formed. As from Fig. As can be seen from 18, they intersect each other in such a way that an imaginary extension surface, for which the processing surface 22 extended outwards in the radial direction, and an imaginary extension surface for which the second surface 168B Extended outwards in the axial direction, it forms an obtuse angle (that is, an angle greater than 90°). Similarly, the machining surface can 22 have a first surface parallel to the radial direction and a second surface inclined with respect to the first surface.

[0052] The features of the various embodiments described above can also be combined. For example, the one described in Fig. 15 additional depths shown 150 even on at least one of the surfaces that form the depression 110 , 116 , 122 , 124 , 114 or 162 define, be formed. Or the area 126 , 128 ,132 or 134 , which deepens 124 defined, can be like the area 114 or 118 the in-depth 110 or 116 can be tilted. Furthermore, the depression described above can be... 124 or 114 so that it has a first to nth (n is an integer of at least 3) depressions.

[0053] The present disclosure has been explained above by means of embodiments, but the embodiments described above do not limit the invention according to the claims.

Claims

[1] workpiece (10), wherein the workpiece (10) comprises a main body section (12); and a coating material (14) applied to the main body section (12), wherein the main body section (12) comprises a machined surface (22); a coating surface (18) arranged across a boundary next to the machined surface (22), onto which the coating material (14) has been applied; and a recess (26) formed in the main body section such that it extends towards the interior of the main body section (12) at the boundary between the machined surface (22) and the coating surface (18), the recess (26) extending along the boundary in such a way as to separate the machined surface (22) and the coating surface (18). [2] Workpiece (10) according to claim 1, wherein the recess (124) has a first recess (130) which extends from the machining surface (22) towards the interior of the main body section, and a second recess (136) which is arranged between the first recess (130) and the coating surface (18) and extends from the coating surface (18) towards the interior of the main body section (12E). [3] Workpiece (10) according to claim 1 or 2, wherein the recess (26) is defined by two surfaces (28, 30) which intersect each other in such a way that they form a predetermined angle. [4] Workpiece (10) according to claim 3, wherein the predetermined angle is at most 90°. [5] Workpiece (10) according to one of claims 1 to 4, wherein the main body section (12G) further comprises an additional recess (150) which is formed such that it extends from one of the two surfaces (28, 30) defining the recess (26) towards the interior of the main body section (12G). [6] Workpiece (10) according to one of claims 1 to 5, wherein the imaginary extension surface of the machining surface and the imaginary extension surface of the coating surface intersect each other such that they form an angle of at least 90°. [7] Method for producing a workpiece (10) according to one of claims 1 to 6, wherein in the method a base material (12') of the main body section (12), that has an unprocessed surface (22'), a coating surface (18) arranged across a boundary next to the unprocessed surface (22'), and a depression (26) formed at the boundary; and after the application of a coating material (14) to the coating surface (18) of the base material (12') a mechanical processing of the unprocessed surface (22') is carried out and the processing surface (22) is formed.

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