Drilling template, process and motor vehicle

Abstract

The invention relates to a drilling template, a method, and a motor vehicle. The drilling template 10 for producing a drilled opening 60 in a body structure 40 of a vehicle comprises a first template element 11 and a second template element 12. The first template element 11 and the second template element 12 are connected to one another via a thread 13. Furthermore, the second template element 12 is partially received inside the first template element 11, wherein the second template element 12 has a cavity 14 for receiving a drill 45. Furthermore, the first template element 11 has an anti-twist device 19. The drilling template 10 can be inserted into a keyhole geometry 50 of the body structure 40.

Description

[0001] The invention relates to the field of automotive engineering. In particular, the present invention relates to the provision of openings in a vehicle for fastening or mounting an object, for example, roof rails. For this purpose, a drilling template according to the features of patent claim 1 is proposed. Furthermore, a method according to the features of patent claim 9 and a vehicle according to the features of patent claim 10 are proposed.

[0002] Customers often request that a vehicle be retrofitted, for example with roof rails. Such a mount requires openings in the vehicle body to mount a bracket or other object on the vehicle. This example describes a specific example of a roof rail retrofit.

[0003] Vehicles are equipped with roof rails upon customer request. This means that a vehicle is manufactured and delivered with roof rails at the customer's request. However, there are also vehicles that do not have roof rails pre-installed. In such a case, roof rails can be retrofitted at a car repair shop upon customer request. This requires that openings be provided on the vehicle to install the roof rails. These openings must first be created at the car repair shop, as these openings are not provided when a vehicle is delivered without roof rails.

[0004] Until now, the production of openings for retrofitting roof rails has been very time-consuming and the quality of the openings for attaching roof rails has sometimes differed from that of the openings already manufactured as standard.

[0005] The previously known solutions without drilling templates have the disadvantage that they do not provide the precision in positioning the desired openings.

[0006] Furthermore, document DE 10 2004 026 773 A1 discloses a fastening device with a support plate and at least one connecting element for a roof rack of a vehicle, allowing a roof rack to be subsequently mounted on the roof of a motor vehicle. However, a support plate is to be avoided in the present case.

[0007] DE 20 2004 011 737 U1 discloses a multi-layer drilling template comprising a surface element through which a guide bore configured to receive a drill bit passes at least one location. The drilling template comprises guide means for aligning the drilling machine containing the drill bit. The surface element is configured in multiple layers and comprises at least two layers. Two so-called cover layers are provided, each forming one of the two outer surfaces of the surface element. The layers are initially displaceable relative to one another and subsequently lockable, thus preventing their displacement.

[0008] DE 203 17 894 U1 discloses a spacer device for bridging a gap between a supporting part and a roof body for attaching a roof rack, roof rails, roof strips, or the like to a vehicle roof. The spacer device comprises a support part and a counter-support part, wherein the support part and the counter-support part are held together by a screw connection and are adjustable relative to one another to adjust the bridging length. Furthermore, the support part and / or the counter-support part have an internal adjustment tool engagement seat for an adjustment tool used for manipulating and / or adjusting the bridging length.

[0009] DE 10 2007 002 570 A1 discloses a roof load carrier module for the quick and secure installation of roof loads, as well as a method for installing such a roof load carrier module. The aim is to provide a visually appealing roof load carrier module that enables the quick and secure installation of roof loads, and the method is to ensure that the module can be installed safely and quickly. For this purpose, a roof load carrier module has a coupling element receptacle on a holding device for at least one coupling element that engages a roof rail support.

[0010] The present invention aims to provide a solution to provide openings for retrofitting on the vehicle with high precision outside of series production.

[0011] This object is achieved with a drilling template according to the features of patent claim 1. Furthermore, this object is achieved with a method according to the features of patent claim 9 and with a vehicle according to the features of patent claim 10.

[0012] The drilling template according to the invention for producing a drill hole in a vehicle body structure comprises a first template element and a second template element. The first template element and the second template element are connected to one another via a thread, with the second template element being partially received within the first template element. Furthermore, the second template element has a cavity for receiving a drill bit. Furthermore, the first template element has an anti-twist device. The drilling template according to the invention can be inserted into a keyhole geometry of the vehicle body structure.

[0013] The first template element and the second template element have a common longitudinal axis in their intended use and both elements are preferably cylindrical.

[0014] The thread of the drilling template is advantageously designed so that the first template element has an internal thread and the second template element has an external thread. The two threads interlock and thus interact.

[0015] By using a thread, the first template element and the second template element can be interchanged, allowing different combinations of the first and second template elements to be created. The drilling template according to the invention is reusable.

[0016] The drilling template according to the invention is preferably intended for retrofitting fastening holes in a vehicle body. So-called "keyhole geometries" are used here, which are present as standard in the vehicle. The keyhole geometries are located in the body and are visible after removing covers. The number of keyhole geometries depends on the series and can therefore have different shapes and dimensions, as well as a different number, depending on the vehicle type. The keyhole geometry can be manufactured as a cast structure or as a sheet metal structure. The casting thickness or sheet metal thickness of the keyhole geometry is, for example, in the range of approximately 1 mm to approximately 5 mm. The thread between the first and second template elements allows the drilling template to be adjusted to different casting thicknesses or sheet metal thicknesses.

[0017] A keyhole geometry is an opening in the vehicle body and typically has two areas: a first elongated area serving as the opening and a second round area serving as the opening. Both areas merge into one another and together form the opening of the keyhole geometry in the inner skin of the vehicle body. The first elongated area of a keyhole geometry has a width of 10 mm, for example, and the second round area of the keyhole geometry has a diameter of 20 mm.

[0018] The desired precision of the drilling is achieved by inserting the drilling template into the second round area of the keyhole geometry as far as it will go and keeping it locked there with the help of the anti-twist device until the desired drill hole has been created. The keyhole geometry has an axis of symmetry in the longitudinal direction of the keyhole geometry. Furthermore, the drilling template has a preferred round shape in plan view, which also has an axis of symmetry. When the drilling template according to the invention is used as intended, the two axes of symmetry, i.e. the axis of symmetry in the longitudinal direction of the keyhole geometry and the axis of symmetry of the round drilling template, are congruent. In this way, the drilling template has a predefined position within the keyhole geometry when in use and a high level of precision in the positioning of the drilling template can be achieved.

[0019] In one embodiment, it can be provided that the drilling template is formed in two pieces.

[0020] In this embodiment, the drilling template comprises a total of two parts: the first template element and the second template element. All technical functions of the drilling template are implemented in these two parts. The two-piece design allows for easy handling of the drilling template.

[0021] In one embodiment, it can be provided that the anti-twist device is formed by a shoulder on a partial circumference of the first template element.

[0022] The first template element has an end face that can be arranged on a partial circumference of the first template element and provides the shoulder. The shoulder is made of the same material as the first drilling template element and is made from the same piece, i.e., the first drilling template element and the stop are integral.

[0023] For example, the shoulder of the anti-rotation device has a contact width of 3 mm and a length of 9.8 mm (curved section on the circumference of the drilling template). This length is therefore less than the width of a typical keyhole geometry of 10 mm. The shoulder encloses an angle of approximately 30 to 60 degrees, preferably 50 degrees. This angle is considered the opening angle and is visible in the top view of the drilling template.

[0024] In one embodiment, it can be provided that the second template element has a hexagon socket geometry.

[0025] A hexagon socket geometry is understood to mean an internal hexagon as a hollow space in the second template element. The second template element preferably has the hexagon socket geometry at its end facing away from the first template element. The hexagon socket geometry is preferably fully integrated into the second template element, i.e. the hexagon socket geometry is not visible from the outside in a side view of the drilling template. It is fully integrated into the cylindrical geometry of the second template element. An Allen key, which has a key width of 6 mm to 8 mm, for example, can engage in the hexagon socket geometry. The drilling template can be locked in place with the Allen key. By inserting the drilling template into the keyhole geometry as far as it will go, a positive fit within the keyhole geometry is achieved.By providing the hexagon socket geometry, a frictional connection can be achieved by tightening the thread of the drilling template using an Allen key. This frictional connection holds the drilling template in place while the desired drilling opening is created.

[0026] In one embodiment, it can be provided that the cavity of the second template element has a step.

[0027] The inner diameter of the cavity changes due to the step. Advantageously, the inner diameter of the cavity in the second template element decreases in the area of the first template element.

[0028] The step of the second template element has the advantage that a drill can be precisely guided within the cavity. This increases the precision of the desired hole in the vehicle structure. The step can have a diameter change of fractions of a millimeter, for example, a value of 0.5 mm.

[0029] In one embodiment, it can be provided that the step divides the cavity into a mounting section with a first inner diameter and a guide section with a second inner diameter, wherein the second inner diameter of the guide section is smaller than the first inner diameter of the mounting section.

[0030] For example, if a drill with a 5 mm outer diameter is used, the inner diameter of the cavity in the guide section is 5 mm (precisely without tolerance). For example, the first inner diameter of the mounting section is more than 5 mm if a 5 mm drill is to be used. For example, the first inner diameter in the mounting section is fifteenths of a mm, meaning the inner diameter of the cavity in the mounting section is slightly larger than the inner diameter of the cavity in the guide section, depending on the drill selected. The guide section has a length of 20 mm, for example.

[0031] In one embodiment, it can be provided that an inner boundary of the cavity of the guide section comprises hardened material.

[0032] At least the inner boundary of the cavity of the guide section is made of hardened material. The entire cavity of the second template element can also be hardened. The hardening makes the drilling template wear-resistant. The precision of the drilling template can be maintained for a long time during reuse. For example, ferritic material with a carbon content of 0.4 to 0.8 percent is used as the hardened material, especially cubic-centered material.

[0033] In one embodiment, it can be provided that the anti-rotation device has a height of at least 2 millimeters, preferably 3 to 4 millimeters.

[0034] The geometry of the anti-twist device ensures that the drilling template can be used securely within the key geometry. The height of the anti-twist device is selected depending on the casting thickness or the sheet metal thickness of the vehicle body.

[0035] The object of the invention is achieved by a method for producing a drill hole using a drilling template. The method comprises providing a drilling template according to the invention and inserting this drilling template into a keyhole geometry. Furthermore, the method provides for locking the drilling template in the keyhole geometry. A drill is then used, which passes through the cavity of the second template element onto the body structure of a vehicle to be drilled through. Finally, the method comprises drilling a drill hole through an outer skin of the vehicle, removing the drill from the cavity of the second template element, and removing the drilling template from the keyhole geometry. A roof or a frame element of the vehicle can be understood as the outer skin here.

[0036] The drilling opening is created from the vehicle's interior by inserting the drilling template into the keyhole geometry. After removing the trim, the keyhole geometry is visible from there. This means that the drilling template is inserted into the keyhole geometry inside the vehicle.

[0037] After using the drilling template and creating a hole, the template is removed and the hole is drilled from the outside of the vehicle body to a diameter required for mounting objects on the vehicle body. In this way, the drilling template can be used to create a precise hole, the diameter of which can be subsequently adjusted.

[0038] Furthermore, after using the drilling template, a spacer can be used to stabilize the body geometry. The spacer can be inserted into the hole and can remain in the body geometry. The spacer serves to stabilize the connection between the outer skin and the interior structure of the vehicle body. The spacer thus functions as a stabilizing element.

[0039] The invention also includes further developments of the method according to the invention that have features already described in connection with the further developments of the drilling template according to the invention. For this reason, the corresponding further developments of the method according to the invention are not described again here.

[0040] The object of the invention is achieved by a vehicle which has at least one drilling opening which is produced by the method according to the invention using the drilling template according to the invention.

[0041] The vehicle according to the invention is preferably a motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, truck or passenger bus.

[0042] The invention also encompasses combinations of the features of the described embodiments. The invention therefore also encompasses implementations that each have a combination of the features of several of the described embodiments, unless the embodiments are described as mutually exclusive.

[0043] Exemplary embodiments of the invention are described below. Shown are: Fig. 1 an embodiment of a drilling template in a side sectional view; Fig. 2 an embodiment of a drilling template during an exemplary use in a keyhole geometry; Fig. 3 an embodiment of a drilling template in a side sectional view; Fig. 4 a perspective view of a section of a body structure of a vehicle with a locked drilling template in a keyhole geometry.

[0044] The exemplary embodiments explained below are preferred embodiments of the invention. In the exemplary embodiments, the described components of the embodiments each represent individual features of the invention that can be considered independently of one another, each of which also develops the invention independently of one another. Therefore, the disclosure is intended to encompass combinations of the features of the embodiments other than those shown. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

[0045] In the figures, the same reference symbols denote elements with the same function.

[0046] Fig. 1 shows an embodiment of a drilling template 10 in a lateral sectional view. The drilling template 10 is used to produce a drilling opening 60, which Fig. 2 is shown in more detail, in a vehicle body 40 of a vehicle.

[0047] The drilling template 10 of the Fig. 1 comprises a first template element 11 and a second template element 12. The first template element 11 and the second template element 12 are connected to one another via a thread 13, so that the second template element 12 is partially received inside the first template element 11. The two template elements are cylindrical, with the second template element 12 having a cavity 14 along a longitudinal axis 30, which can accommodate and guide a drill 45 for producing the desired drill opening 60.

[0048] Furthermore, the drilling template 10 has in the Fig. 1 a distance between the first template element 11 and a second template element 12, in which a sheet thickness 22 of a keyhole geometry can be accommodated. The sheet thickness 22 can be variable, i.e. the drilling template 10 can be used for different sheet thicknesses 22. For this purpose, a support surface 18 is arranged on the first template element 11, wherein the distance between the end face 18 and the second template element 12 can be adjusted via the thread 13 of the drilling template 10. Overall, the support surface 18 and the geometry of the second template element 12 result in a stop in the area of the support surface 18, which stop can be used for precise positioning of the drilling template 10 in a keyhole geometry 50, cf. Fig. 2 (a) to (c).

[0049] Furthermore, the drilling template 10 of the Fig. 1 has a step 15 inside the cavity 16. The step 15 divides the length of the cavity 16 into a first section and a second section. The first section can be understood as an assembly section 33 and the second section can be understood as a guide section 34. A hexagon socket geometry 16 is also arranged in the assembly section 33 in order to be able to accommodate an Allen key tool. With this tool, the drilling template 10, in particular the first template element 11, can be pressed against a boundary, such as a sheet metal or the outer skin 42 of a vehicle, in order to be able to produce the desired drilling opening 60 there without slipping.

[0050] It is intended to use a so-called keyhole geometry for the positioning of the drilling template 10. A keyhole geometry 50, as shown in Fig. 2 (a) to (c) is an opening in the body structure 40 of a vehicle that is visible from the inside when a panel is removed. The keyhole geometry 50 is not visible on the outer skin 42 of the vehicle. The desired drilled opening 60 in the outer skin 42 of the vehicle is created using the internal keyhole geometry 50.

[0051] An exemplary keyhole geometry 50 is shown in Fig. 2 (a) to (c). The use of the drilling template 10 in the keyhole geometry 50 will now be explained in more detail. Here, the vehicle's outer skin 42 is viewed from the outside, i.e., from the outer side 41 of the vehicle. In this case, no contours of the keyhole geometry 50 are actually visible; therefore, to explain the creation of a desired drilling opening 10, the underlying keyhole geometry 50 is shown in the Fig. 2 (a) to (c). The top view in Fig. 2 (a) to (c) are presented as if the outer skin 42 of the vehicle were transparent to better explain the situation. This assumption allows the underlying vehicle structure with the keyhole geometry 50 to be visible.

[0052] The keyhole geometry 50 in the Fig. 2 (a) to (c) has a first region 51 and a second region 52, which are connected to one another and form an opening. The first region 51 has a larger opening than the second region 52, wherein the shapes or contours of the two regions 51, 52 also differ. The first region 51 is round. The second region 52 is more elongated with a transition region into the first region 51. The keyhole geometry 50 has a longitudinal axis 53 and a transverse axis 54, wherein the longitudinal axis 53 is arranged centrally in the opening of the keyhole geometry 50. Furthermore, the transverse axis 54 in the second region 52 is arranged perpendicular to the longitudinal axis 53 and intersects it at a center point 61 of the desired drilled opening 60. The first region 51 has, for example, a diameter of 20 mm. The second region 52 has, for example, a width of 10 mm, the width being measured perpendicular to the longitudinal axis 53.

[0053] Fig. Figure 2 (a) shows a starting situation of a keyhole geometry 50 that is to be used to drill a hole 60 into the outer skin 42 of a vehicle with high precision. The center point 61 indicates the position of the center of the desired hole 60 in the outer skin 42 of the vehicle.

[0054] Fig. 2 (b) shows a situation in which a drilling template 10 is locked in the second region 52 of the keyhole geometry 50. The drilling template 10 can, for example, be made according to the embodiment of Fig. 1. The locking of the drilling template 10 occurs by inserting the drilling template 10 into the first region 51 of the keyhole geometry 50 and then pushing it from there into the second region 52 of the keyhole geometry 50. The interior structure 44 of the vehicle, in particular a sheet metal structure or a cast structure, with a uniform thickness in the region of the opening of the keyhole geometry 50, is located between the first template element 11 and the second template element 12.

[0055] The anti-twist device 19 of the drilling template 10, in Fig. 2(b) in plan view, ensures that the drilling template 10 can only be inserted into the second region 52 of the keyhole geometry 50 in a specific direction. Advantageously, the anti-rotation device 19 is formed by a shoulder. This shoulder can be positioned at a height of 29, see FIG. Fig. 3, cannot be inserted into the second region 52 of the keyhole geometry 50. Thus, the anti-rotation device 19 remains arranged in the direction of the first region 51 and makes the drilling template 10 easily anti-rotation. The shoulder is formed on the circumference of the first drilling template element 11 and has an opening angle 32, which is, for example, 50 degrees. The shoulder is advantageously dimensioned such that it forms a partial circumference of the drilling template 10 and its opening angle 32 enables anti-rotation protection.

[0056] After inserting the drilling template 10 into the first area 51 of the keyhole geometry 50 and moving the drilling template 10 into the second area 52 of the keyhole geometry 50, the drilling template 10 is locked in the second area 52 of the keyhole geometry 50 using an Allen key that engages the hexagon socket geometry 16. This ensures that the drilling template 10 remains firmly in the keyhole geometry 50 while the desired bore 60 is created.

[0057] After locking the drilling template 10 in the keyhole geometry 50 of the Fig. 2(b), a drill 45 can be inserted into the drilling template 10 from the interior 43 of the vehicle in order to then drill the desired hole 60 into the outer skin 42 of the vehicle. The use of the drill 45 is described in more detail in Fig. 4 shown.

[0058] The precision of the drilling opening 10, ie its position with respect to the keyhole geometry 50, is achieved because the edge of the second drilling element 12 abuts against the edge of the keyhole geometry 50 in the second area 52 and is held in place by the locking device.

[0059] Fig. Figure 2 (c) shows a situation in which the desired drill hole 60 has been produced and the drilling template 10 has already been removed from the keyhole geometry 50. The produced drill hole 60 has been placed with high precision on the longitudinal axis 53 in the second area 52 of the keyhole geometry 50. The center point 61 of the drill hole 60 coincides with the intersection point of the two axes 53, 54. This intersection point is also determined by the axis 30, which in Fig. 1 and Fig. 3 is shown.

[0060] Furthermore, it is advantageously provided that the bore opening 60 is enlarged in diameter by drilling with a second drill from the outside 41 of the vehicle. This second drill has a larger diameter and uses the bore opening 60 as a positioning point for the second drill. The second drill then creates a bore 62, which Fig. 2 (c). Thus, the drilled opening 60 can be understood as a pilot hole and the counterbore as the target hole. The target hole depends on the desired fastening, e.g., a roof rail, on the outer side 41 of the vehicle structure 42. The pilot hole, produced using the drilling template, has, for example, an opening diameter of 5 mm. The target hole, produced with a second drill using the pilot hole, has, for example, an opening diameter of 13.5 mm. The target drill can be a commercially available drill, since no stepped hole is necessary.

[0061] As provided for drilling, deburring of the pilot hole and / or the target hole can be carried out.

[0062] Furthermore, it can be provided that after the production of the bore 62, a spacer is used which is inserted into the bore 62, for example by turning it until the outer skin 42 and one end of the spacer are flush. The spacer remains permanently installed and improves the mechanical stability of the body structure 40 in the area of the bore 62. Spacers are also used in series production, so that the manufactured bores are equipped in the same way as in series production. The spacer has a cylindrical shape and typically has a through-hole. A fastening device, such as a fastening screw, can be guided through the through-hole in order to be able to mount roof rails.

[0063] Fig. Figure 3 shows an embodiment of a drilling template 10 in a side sectional view, which is locked in a keyhole geometry 50. Dimensions are also provided using the individual reference numerals. The total length 20 of the drilling template 20 corresponds to the length of the second template element 12. The length 21 of the first template element 11 is the length without including the height of the anti-rotation device.

[0064] The total length 20 of the drilling template 10 is, for example, 50 to 100 mm. The length 21 of the first template element is, for example, 15 mm. The outer diameter 23 of the first template element is, for example, 20 mm. The outer diameter 24 of the second template element 12 is, for example, 14 mm.

[0065] Furthermore, in Fig. 3 shows an outer diameter 23 of the first template element 11 and an outer diameter 24 of the second template element 12. A step 15 divides the cavity 16 into a length 25 of the mounting section 33 and a length 26 of the guide section 34. The mounting section 33 has a length of at least 15 mm so that the drill 45 can be easily and safely inserted into the drilling template 10. The drill 45 is guided precisely in the guide section 34, i.e. without tolerance, so that the drill 45 cannot tilt. This means that the inner diameter of the cavity 16 has exactly the dimensions of the outer diameter of the drill 45, for example 5 mm.

[0066] The inner diameter 27 of the cavity 14 in the mounting section 33 differs from the inner diameter 28 of the cavity 14 in the guide section 34. Furthermore, the cavity 14 is hardened, at least in the guide section 34, and additionally possibly also in the mounting section 33. For this purpose, for example, hardenable tempering steel is used.

[0067] Fig. 4 shows a perspective view of a section of a body structure 40 of a vehicle with a locked drilling template 10, ie, screwed tight with the hexagon socket geometry, in a keyhole geometry 50. A drill 45 is guided from the interior 43 of the vehicle into the outer skin 42 of the vehicle via the cavity 14 of the drilling template 10. The drill 45 hits the outer skin 42 of the vehicle at a right angle 31.

[0068] Overall, the examples show how a drilling template 10 can be provided and used in a vehicle. List of reference symbols 10 drilling template 11 first template element 12 second template element 13 threads 14 Cavity (cylindrical) 15th level 16 hexagon socket geometry 17 Frontal surface 18 Support surface or stop 19 Anti-twist device or shoulder 20 Total length of the drilling template 21 Length of the first template element 22 Sheet thickness (variable) 23 Outer diameter of the first template element 24 Outer diameter of the second template element 25 Length of the assembly section 26 Length of the guide section 27 Inner diameter of the cavity in the mounting section 28 Inner diameter of the cavity in the guide section 29 Height of the anti-twist device 30 Longitudinal axis of the drilling template 31 right angle 32 Opening angle of the anti-twist device shoulder 33 Assembly section 34 Guide Section 40 Body structure of a vehicle 41 Exterior of the vehicle 42 Outer skin of the vehicle 43 Interior of the vehicle 44 Interior structure of the vehicle 45 drills 50 Keyhole geometry 51 first area of the keyhole geometry 52 second area of the keyhole geometry 53 Longitudinal axis of the keyhole geometry 54 Transverse axis of the keyhole geometry in the second area 60 opening 61 Center of the opening 62 Boring

Claims

[1] Drilling template (10) for producing a drilling opening (60) in a body structure (40) of a vehicle, comprising a first template element (11), a second template element (12), wherein the first template element (11) and the second template element (12) are connected to one another via a thread (13) and the second template element (12) is partially received inside the first template element (11), wherein the second template element (12) has a cavity (14) for receiving a drill (45), wherein the first template element (11) has an anti-twist device (19) and wherein the drilling template (10) can be introduced into a keyhole geometry (50) of the body structure (40). [2] Drilling template (10) according to claim 1, the drilling template (10) is formed in two pieces. [3] Drilling template (10) according to claim 1 or claim 2, wherein the anti-rotation device (19) is formed by a shoulder on a partial circumference of the first template element (11). [4] Drilling template (10) according to one of the preceding claims, wherein the second template element (12) has a hexagon socket geometry (16). [5] Drilling template (10) according to one of the preceding claims, wherein the cavity (14) of the second template element (12) has a step (15). [6] Drilling template (10) according to claim 5, wherein the step (15) divides the cavity (14) into a mounting portion (33) having a first inner diameter (27) and a guide portion (34) having a second inner diameter (28), wherein the second inner diameter (28) of the guide portion (34) is smaller than the first inner diameter (27) of the mounting portion (33). [7] Drilling template (10) according to one of the preceding claims, wherein an inner boundary of the cavity (14) of the guide section (34) comprises hardened material. [8] Drilling template (10) according to one of the preceding claims, wherein the anti-rotation device (19) has a height of at least 2 millimeters, preferably 3 to 4 millimeters. [9] Method for producing a drilling opening (60) with a drilling template (10), comprising Providing a drilling template (10) designed according to one of the preceding claims 1 to 8; Inserting the drilling template (10) into a keyhole geometry (50); Locking the drilling template (10) in the keyhole geometry (50); using a drill (45) that passes through the cavity (14) of the second template element (12) onto the body structure of a vehicle (40) to be drilled through; Drilling the hole (60) through an outer skin of the vehicle (42); Removing the drill (45) from the cavity (14) of the second template element (12); and Remove the drilling template (10) from the keyhole geometry (50). [10] Motor vehicle comprising at least one bore hole (60) produced by the method according to claim 9.

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