Teaching method for centering a tool on a workpiece

Abstract

Teaching (10) for the centered positioning of a tool (12), in particular a center punch, a drill, a pen, a laser emitter and / or a laser sensor, on a workpiece (14) having, in particular a circular cylindrical cross-section, a workpiece surface (16), in particular an inner or outer cylindrical surface (16a), and / or an axis, in particular a central axis (M), in particular on a semi-finished product, or on a rod or on a tube, characterized in that the gauge (10) has a tool (12) and / or a tool (12) can be arranged and / or attached to the gauge (10), that the gauge (10) has a frame (18), a rotary drive element (24) and a first, a second and a third arm (28a, 28b, 28c), wherein the rotary drive element (24) is rotatably mounted on the frame (18) and each arm (28a, 28b, 28c) has an inner end (30i) and an outer end (30a),wherein the inner ends (30i) are functionally coupled and / or connected to the rotary drive element (24) and the outer ends (30a) are guided on the frame (18) so as to be movable substantially in the radial direction, wherein a sensing and / or contact element (32) is arranged and / or formed on each of the first, second and third arms (28a, 28b, 28c) and thus a first, a second and a third sensing and / or contact element (32a, 32b, 32c) is available for contacting the workpiece surface (16) of the workpiece (14), and wherein, with a corresponding movement of the first, second and / or third arm (28a, 28b, 28c), the workpiece surface (16) of the workpiece (14) can then be contacted by means of the first, second and / or third sensing and / or contact element (32a, 32b, 32c). and / or the workpiece (14) can be clamped and / or gripped in such a way,so that the tool (12) is then positioned centrally on the workpiece (14) and / or can be positioned centrally.

Description

[0001] The invention relates to a teaching for the centered positioning of a tool, in particular a center punch, a drill, a pen, a laser emitter and / or a laser sensor on a workpiece having, in particular a circular cylindrical cross-section, a workpiece surface, in particular an inner or outer cylindrical surface, and / or an axis, in particular a central axis, in particular on a semi-finished product, preferably on a rod or on a tube.

[0002] For example, so-called "centering squares" are known in the prior art, which can be used as scribing tools to determine the center of shafts or other cylindrical workpieces. The "centering square" has two legs arranged at a 90° angle. A ruler is attached to the square, bisecting the 90° angle formed by the legs. A cylindrical workpiece is placed against the inside of the legs, and a marking line is drawn along the ruler with a pencil. After rotating the workpiece or the centering square, another marking line is drawn in the same way. The point where the two marking lines intersect is the center of the circle and thus the longitudinal axis of the workpiece. The center point thus determined can then be marked in a known manner by manually placing a scriber or center punch.However, handling this well-known centering angle is cumbersome; centering the tool and marking the center point is very labor-intensive.

[0003] The invention is therefore based on the objective of simplifying the centered positioning of a tool, in particular a center punch, a drill, a pen, or also a laser emitter and / or a laser sensor on the workpiece, in particular enabling the centered positioning of a tool on the one hand without great effort, and on the other hand as accurately or precisely as possible.

[0004] The problem previously identified is now solved by the features of claim 1. Preferred embodiments of the invention are described in the dependent claims.

[0005] The invention comprises a tool and / or a tool can be arranged and / or attached to the invention. Furthermore, the invention comprises a frame, a rotary drive element, and a first, a second, and a third arm. The rotary drive element is rotatably mounted on the frame, and each arm has an inner end and an outer end. The inner ends of the respective arms are functionally coupled and / or connected to the rotary drive element, with the respective outer ends of the respective arms being guided on the frame so as to be movable essentially in a radial direction. The term "essentially" here means that the respective outer ends of the respective arms can, for example, also be guided on the frame in a radially curved and / or arc-shaped path. Therefore, a straight, linear radial path is not absolutely necessary, although it is preferably implemented.Each of the first, second, and third arms is equipped with a sensing and / or contact element, thus providing a first, second, and third sensing and / or contact element for contacting the workpiece surface. With appropriate movement of the first, second, and / or third arm, the workpiece surface, particularly its inner or outer surface, can be contacted and / or the workpiece clamped and / or gripped using the first, second, and / or third sensing and / or contact element, thereby positioning the tool centrally on the workpiece. The device has, in particular, a centering axis, and the workpiece has, in particular, a central axis.A tool is positioned centrally on the workpiece using the gauge, and / or can be positioned centrally, whereby, in particular, a longitudinal axis of the tool arranged on the gauge lies substantially on the centering axis of the gauge, and / or – after the tool has been centered on the workpiece using the gauge – a longitudinal axis of the tool lies substantially on a central axis of the workpiece, and / or the path of the longitudinal axis of the tool corresponds to the path of the central axis of the workpiece. Put another way: In particular, a longitudinal axis of the tool corresponds substantially to the central axis of the workpiece when the tool is positioned centrally on the workpiece using the gauge.The aforementioned term "essentially" is intended to include, in particular, the usual deviations due to manufacturing and / or assembly tolerances. It should also be noted that the "longitudinal axis" of the tool could also be referred to as its "central axis."

[0006] A particular advantage is that the handling of the inventive device is very simple and precise. In the preferred embodiment, the rotary drive element is first rotated relative to the frame so that the three sensing and / or contact elements are positioned radially far enough outwards that their distance from a centering axis is greater than the radius of a circular end face of the workpiece, for example, a rod, to be machined with the desired tool. For this purpose, the frame is placed with its front against the end face of the workpiece. Then, the rotary drive element is rotated relative to the frame so that the three sensing and / or contact elements move radially inwards until they make contact with the workpiece surface, in particular the outer circumferential surface of the workpiece.This positions the tool centrally on the workpiece, and in a further step, the center point of the end face, thus located, can be machined / center-punched using a tool inserted in a holder and / or fixture, in particular, for example, a center punch. This enables precise center-punching of the end face of, for example, a rod, with minimal effort.

[0007] The preceding statements relate to a first preferred embodiment, wherein the sensing and / or contact elements contact and / or grip the outer workpiece surface, in particular the outer cylindrical surface of the workpiece, or the workpiece can be clamped in this way, for example a round rod formed from solid material or a corresponding rod element.

[0008] In another embodiment of the teaching, it is possible, for example, particularly in the case that the workpiece is a tube, that the sensing and / or contact elements do not contact the outer surface of the workpiece, here the tube, but rather, for example in the case of a tube, the inner surface is contacted with the help of the sensing and / or contact elements, in particular that the workpiece is then clamped and / or graspable in such a way.For this purpose, the rotary drive element can be rotated relative to the frame so that the three sensing and / or contact elements are initially located radially inwards, i.e., positioned very close to a centering axis of the gauge. Then, in the case described here, where the workpiece is, for example, a tube, the rotary drive element is rotated relative to the frame so that the three sensing and / or contact elements move radially outwards after the gauge has been placed against the end of the tube, until the sensing and / or contact elements make contact with the inner surface. The gauge can then, in particular, include a laser emitter and / or laser sensor as a tool. Specifically, a laser emitter and / or laser sensor (or a reflective surface) could also be arranged at the other end of the tube using the gauge, so that the curvature of the tube can be measured or...The curvature of the pipe can be measured. Simply put, the tool can also be designed as a "measuring tool". This case, as well as other applications, are conceivable.

[0009] In the preferred embodiment, the frame is designed as a guide star. The rotary drive element includes, in particular, a pull star and / or a rotary handle. The frame has a front and a back and is pressed, in particular with its front, against the workpiece, especially against the end face of a workpiece, preferably a rod element and / or a tube.

[0010] In the preferred embodiment, the first, second, and third arms are arranged on one side of the frame, particularly on the front of the frame. It is also conceivable to arrange the arms on the back of the frame.

[0011] The rotary drive element extends partially through the frame. A bearing and / or sliding guide is implemented and / or designed between the rotary drive element and the frame, so that the rotary drive element can rotate relative to the frame, in particular the rotary handle can be rotated manually by the user.

[0012] In principle, the rotary drive element in the preferred embodiment therefore has a front section located on the front of the frame and a rear section located on the back of the frame. In the preferred embodiment, the front and rear sections can be formed as integral parts of the rotary drive element. However, it is also conceivable that the front section or the rear section is each provided and / or formed as a separate component, in which case the front section is effectively coupled and / or rigidly connected to the rear section.

[0013] In the preferred embodiment, the rear section of the rotary drive element is now designed as a rotary handle that extends outwards from the rear of the frame and can be grasped by a user, with the front section being designed as a pull star, which may be explained in more detail below with reference to the following figures.

[0014] In an alternative embodiment, it is also conceivable that the rear section of the rotary drive element is partially disc-shaped and / or plate-shaped, wherein the rear section can then be rotatably driven manually and / or electrically, in particular for example with a cordless screwdriver.

[0015] In the preferred embodiment, the first, second, and third arms are pivotably mounted at their respective inner ends on the front section of the rotary drive element, in particular on the star wheel. The first, second, and third sensing and / or contact elements run essentially parallel to each other or are arranged parallel to each other and, in the preferred embodiment, extend from the front of the frame at the respective outer ends of the first, second, and / or third arms.

[0016] With the help of the first, second and third sensing and / or contact element, the workpiece surface, in particular an inner or outer surface of the workpiece, can now be contacted, clamped and / or grasped.

[0017] In the preferred embodiment, the respective first, second, and / or third sensing and / or contact element is arranged and / or formed in the region of the respective outer end of the respective first, second, and / or third arm. It is also conceivable that the sensing and / or contact element is formed in a region of the respective arm spaced apart from the outer end.

[0018] In the preferred embodiment of the teaching, sliding guide means are provided and / or present, such that the frame has a first, a second, and a third sliding guide. Here, each first, second, and third sliding guide is assigned to the respective first, second, and third arm, so that the respective outer end of each first, second, and third arm can be functionally connected and / or slidably to the frame. When the rotary drive element is rotated relative to the frame in a first direction, the respective outer ends are moved towards the centering axis, and when the rotary drive element is rotated relative to the frame in a second direction—opposite to the first—they are moved away from the centering axis. This allows the workpiece to be contacted or gripped by means of the sensing and / or contact elements, or allows the sensing and / or contact elements to detach from the workpiece.be moved away.

[0019] The sliding guides formed in the frame are essentially linear and run primarily radially to the centering axis of the gauge. However, an arcuate or curved path for the sliding guides is also conceivable; this should be noted again.

[0020] In particular, each sliding guide is now formed and / or implemented by an elongated hole and a sliding element. The elongated holes are formed in the frame, and the respective sliding elements are functionally and effectively connected to the respective arms; in particular, the respective outer ends of the respective arms are effectively connected to the respective sliding elements.

[0021] In the basic arrangement of the individual components of the teaching device, the respective inner ends of each arm are positioned at a first equal radial distance from the centering axis. The same applies to the respective outer ends, which are located at a second equal radial distance from the centering axis, and similarly to the respective sensing or contact elements, which are located at a third equal radial distance from the centering axis. When the arms are moved, the distance between the outer ends of the arms, or the distance between the sensing and / or contact elements, and the centering axis changes, decreasing or increasing depending on the direction of rotation.

[0022] The overall arrangement of the first, second, and third sensing and / or contact elements relative to each other, or between the inner and outer ends of the arms, can vary considerably. These components are typically arranged with uniform offsets, especially at an angle of 120° to each other. However, other angles or corresponding angular ranges are also conceivable. The essential point is that the three arms, or rather the three sensing and / or contact elements, allow the workpiece to be gripped in such a way that the tool can be positioned centrally on the workpiece. Due to the arrangement of the arms, the inner ends are located radially further inward from the centering axis (especially in most possible positions) than the respective outer ends of the arms.The latter, however, also depends in particular on the length of the sliding guides in the frame as well as the connection of the inner ends of the arms to the star wheel or its specific design.

[0023] There are various ways to arrange different tools in or on the gauge, or to functionally connect them to the gauge. For this purpose, the gauge has, in particular, a receptacle and / or holder for receiving and / or arranging the corresponding tool, or a corresponding receptacle and / or holder is provided for this purpose. The tool can then be arranged in the receptacle and / or holder in such a way that it is movable on and / or substantially concentric to a centering axis of the gauge.

[0024] In the preferred embodiment, the receptacle and / or holder for the tool is provided and / or formed in the rotary drive element. In particular, the receptacle and / or holder is provided and / or formed in the star wheel and / or the rotary handle. For this purpose, the rotary drive element has a through-hole for receiving the tool, wherein the through-hole then forms, in particular, at least partially, the receptacle and / or holder for the tool. The through-hole is essentially concentric with the centering axis. Therefore, the star wheel and the rotary handle, in particular, have the through-hole.

[0025] The tool is inserted and / or can be inserted or positioned in the holder and / or mount in such a way that it is displaceable relative to the holder and / or mount, in particular essentially concentrically to the centering axis. Specifically, the tool is inserted and / or can be inserted into the through-hole essentially without significant radial play, such that a longitudinal axis of the tool lies essentially on the centering axis. The tool can be a center punch, a drill bit, or even a writing stylus. With the aid of such tools, a corresponding center point on the end face of the workpiece can be center-punched, drilled, i.e., machined, and in particular marked. It is also conceivable that the tool could be designed as a measuring tool, for example, as a laser emitter and / or as a laser sensor. With the latter, in particular, measurement or...Measuring curvatures in, for example, pipes (as workpieces) is then made possible in a simple way.

[0026] In the preferred embodiment, the movement of the tool, which is designed in particular as a center punch or writing stylus, is essentially realized along the centering axis towards the front of the frame against a spring force. This results in the tool automatically returning to its initial position after actuation. For example, if the tool is designed as a center punch and the user strikes the center punch from the rear of the frame with a hammer, marking / punching the end face or center point of the workpiece (since the center punch extends through the through-hole), the center punch is then automatically returned to its initial position after actuation due to the appropriate arrangement of a spring.

[0027] The effort required to find the center point of the end face of a workpiece, and then simultaneously mark and / or machine the center point, is therefore considerably simplified, and precise alignment / centering of the tool relative to the workpiece can be easily achieved.

[0028] There are numerous ways to advantageously develop and refine the invention. For this purpose, reference may first be made to the claims subordinate to claim 1. A preferred embodiment of the invention will now be explained in more detail with reference to the following drawing and description.

[0029] The drawing shows: Fig. 1 In schematic representation a perspective view from the front of a circular cylindrical workpiece, in particular a rod element or a rod, and of a preferred embodiment of a teaching according to the invention, wherein a tool is inserted into or arranged in the teaching, wherein it is also recognizable that the teaching has three arms, the outer ends of which are in a radially outer position, wherein the workpiece with its circular rear end face rests against the three arms or the teaching with its front face rests against the rear end face of the workpiece; Fig. 2 the lesson from the Fig. 1 in schematic representation without the workpiece, with the outer ends of the arms in a radially inner position; Fig. 3. In schematic representation, another perspective view of the in Fig. 2. The teaching shown is from the back, i.e., from the back of the teaching; as well as Fig. 4 those in the Fig. 2 and Fig. 3. Teaching shown in schematic representation in section.

[0030] The Fig. Figures 1 to 4 show a schematic representation of a gauge 10 for the centered positioning of a tool 12 on a workpiece 14. The “gauge 10” can / could also be referred to as a “device 10”.

[0031] The tool 12 can be configured, in particular, as a center punch, a drill bit, or a writing stylus. Furthermore, the tool 12 can be configured, in particular, as a "measuring tool," specifically as a laser emitter and / or a laser sensor. The term "laser emitter" refers, in particular, to a laser module and / or a laser diode for generating a laser beam.

[0032] With the aid of the gauge 10, the tool 12 can be centered on a workpiece 14 having a workpiece surface 16, in particular an inner or outer cylindrical surface 16a, and an axis, in particular a central axis M. In other words: With the aid of the gauge 10, the center point, in particular, for example, the center point of an end face of a rod element and / or a tube, can be determined, and, in particular, the workpiece 14 can also be marked, machined, and / or partially measured using the tool 12.

[0033] The workpiece 14 can in particular be designed as a semi-finished product, preferably a rod or a tube. Fig. Figure 1 shows in particular a rod element made of solid material or a rod with a circular cross-section. The teaching 10 is in Fig. 1 is arranged on the rear end face of the workpiece 14, which is designed as a rod element or as a rod, or rests against it accordingly. Furthermore, the gauge 10 has a tool 12, or a tool 12 is arranged on the gauge 10.

[0034] As the Fig. As shown in Figures 1 to 4, the teaching 10 comprises a frame 18, a rotary drive element 24, and a first, a second, and a third arm 28a, 28b, and 28c. The rotary drive element 24 is rotatably mounted on the frame 18, and each arm 28a, 28b, and 28c has an inner end 30i and an outer end 30a. The inner ends 30i are functionally coupled and / or connected to the rotary drive element 24, with the outer ends 30a being guided on the frame 18 so as to be movable essentially in the radial direction. A sensing and / or contact element 32 is arranged and / or formed on each of the first, second, and third arms 28a, 28b, and 28c. Thus, a first, a second and a third touch and / or contact element 32a, 32b and 32c are available for contacting the workpiece surface 16, in particular the outer cylindrical surface 16a, of the workpiece 14.With a corresponding movement of the first, second and / or third arm 28a, 28b and 28c, the workpiece surface 16, here in particular the outer cylindrical surface 16a, of the workpiece 14 can then be contacted and / or the workpiece 14 can be clamped and / or gripped in such a way with the help of the first, the second and / or third sensing and / or contact element 32a, 32b and 32c, so that the tool 12 can then be positioned centrally and / or be positioned centrally on the workpiece 14.

[0035] In particular Fig. Figure 1 shows a central axis M of the workpiece 14 and a centering axis Z of the gauge 10. This is clearly visible from the... Fig. 1 to 4 also states that the tool 12 or its longitudinal axis is arranged on the gauge 10 corresponding to the centering axis Z, so that with the help of the tool 12 arranged on the gauge 10 the tool 12 can then be positioned centrally on the workpiece 14, so that in particular the longitudinal axis of the tool 12 then lies essentially on the central axis M of the workpiece 14 or coincides with it and / or corresponds to this central axis M when the three sensing and / or contact elements 32 contact the workpiece surface 16, here in particular the outer cylindrical surface 16a, in particular then “clamp” the workpiece 14 accordingly.

[0036] As the Fig. As shown in Figures 1 to 4, the gauge 10 here features the tool 12, whereby, in particular, the realization of the aforementioned features makes the handling of the gauge 10 and / or the tool 12 possible not only without great effort, but also makes it possible to find and / or mark the center point of the end face of the workpiece 14, which is designed in particular as a rod element, in a simple way, which may now be described in more detail below.

[0037] As can be seen particularly from the Fig. 2 and Fig. As can be clearly seen, the frame 18 is designed in particular as a guide star 18a, and therefore has in particular three essentially elongated radially extending areas which are arranged and / or designed in a “star-like” manner.

[0038] In the preferred embodiment, the rotary drive element 24 now has a pull star 24v and a rotary handle 24h, which will be explained in more detail below.

[0039] As the Fig. As further illustrated in paragraphs 1 to 4, the frame 18 has a front 18v and a back 18r.

[0040] The first, second and third arms 28a, 28b and 28c are arranged on one side of the frame 18, in particular here on the front 18v of the frame 18.

[0041] The rotary drive element 24 extends at least partially through the frame 18, this is particularly evident from Fig. 4 recognizable. Furthermore, it shows Fig. 4, that a bearing 33 and / or a sliding guide is realized, arranged and designed between the rotary drive element 24 and the frame 18, so that the rotary drive element 24 is rotatable relative to the frame 18.

[0042] The following may be stated in particular with regard to the rotary drive element 24 and corresponding other possible embodiments: Basically, the rotary drive element 24 has a front section, which is located in front of or on the front 18v of the frame 18. Furthermore, the rotary drive element 24 has a rear section, which is located behind or on the back 18r of the frame 18.

[0043] In the preferred embodiment, the rotary drive element 24 comprises the aforementioned front section and the aforementioned rear section as an integral component. However, it is also conceivable that the front section and the rear section are each provided and / or designed as separate components and that the front section is effectively coupled and / or rigidly connected to the rear section.

[0044] As the Fig. Figures 1 to 4 show that the rear section of the rotary drive element 24 is specifically designed as a rotary handle 24h. However, it is also conceivable that the rear section is partially disc-shaped and / or plate-shaped, and in particular designed so that it can be rotatably driven manually and / or electrically, especially with a cordless screwdriver. Therefore, other embodiments and drive forms for the rear section are also conceivable; it does not necessarily have to be designed as a rotary handle.

[0045] During the Fig. In the preferred embodiment of the invention 10 shown in Figures 1 to 4, the rear section is designed as a rotary handle 24h, wherein the rotary handle 24h extends outwards from the rear 18r of the frame 18 and can be manually grasped by a user. Furthermore, in the embodiment shown here in the Fig. In the preferred embodiment of the invention 10, as shown in Figures 1 to 4, the front section is designed as a pull star 24v. The first, second, and third arms 28a, 28b, and 28c are pivotably mounted at their respective inner ends 30i on the front section of the rotary drive element 24, in particular on the pull star 24v. In particular, the pull star 24v itself also has three corresponding arm-shaped sections that extend substantially radially, wherein the inner ends 30i of the arms 28a, 28b, and 28c are pivotably connected to the outer ends of the arm-shaped sections of the pull star 24v, and this is particularly evident from Fig. 2 is evident.

[0046] The Fig. 1 and Fig. Figure 2 now shows that the first, second and / or third sensing and / or contact elements 32a, 32b and 32c are essentially parallel to each other and / or arranged, and in particular that the sensing and / or contact elements 32 are designed as contact pins. Specifically, the first, second and / or third sensing and / or contact elements 32a, 32b and 32c are arranged and / or formed at the respective outer end 30a of the respective first, second and / or third arm 28a, 28b and 28c, wherein the contact elements 32a, 32b and 32c extend away from the front face 18v of the frame 18, and in particular, from the respective outer end 30a of the respective arm 28 away from the frame 18.

[0047] With the aid of the first, second, or third sensing and / or contact element 32a, 32b, and 32c, the workpiece surface 16, in particular the outer cylindrical surface 16a of the workpiece 14, can be contacted, clamped, and / or gripped. This is not explicitly shown in the figures, but can be inferred from the Fig. 1. This is generally evident, because Fig. Figure 1 makes it clear that when the outer ends 30a of the respective arms 28a, 28b and 28c move radially inwards, the sensing and / or contact elements 32 can grasp or contact the outer surface 16a of the workpiece 14, and in particular clamp the workpiece 14.

[0048] During the Fig. In the preferred embodiment of teaching 10 shown in Figures 1 to 4, the respective first, second and / or third sensing and / or contact element 32a, 32b and 32c is arranged and configured in the region of the respective outer end 30a of the respective first, second or third arm 28a, 28b and 28c. It would also be conceivable to arrange / configure a sensing and / or contact element between the inner end and the outer end of the respective arm 28; this should also be noted.

[0049] As the Fig. 2 and Fig. As can be clearly seen in Figure 3, the frame 18 has a first, a second, and a third sliding guide 34a, 34b, 34c. The sliding guide 34 or corresponding sliding guide means are provided or present to guide the outer ends 30a of the respective arms 28 radially inwards or radially outwards. The respective first, second, and third sliding guide 34a, 34b, 34c is assigned to the respective first, second, and third arms 28a, 28b, and 28c, so that the respective outer end 30a of the respective first, second, and third arms 28a, 28b, and 28c can be functionally connected and / or slidably to the frame 18.

[0050] When the rotary drive element 24 is rotated relative to the frame 18 in a first direction, the respective outer ends 30a of the respective arms 28 move towards the centering axis Z. Conversely, when the rotary drive element 24 is rotated relative to the frame 18 in a second direction – opposite to the first – they move away from the centering axis Z. In other words, a corresponding rotational movement of the rotary drive element 24 moves the outer ends 30a, or the sensing and / or contact elements 32, radially outwards or radially inwards, specifically away from or towards the centering axis Z of the gauge 10.

[0051] As the Fig. As can be clearly seen in Figures 1 to 3, the sliding guides 34a, 34b, 34c are essentially linear and run essentially radially to the centering axis Z. A radially arc-shaped or curved path, as already mentioned at the beginning, would also be conceivable.

[0052] Each sliding guide 34a, 34b, 34c is formed or realized by an elongated hole 36 and a sliding element 38. The elongated holes 36 are formed in the frame 18, and the respective sliding elements 38 are functionally connected to the respective arms 28a, 28b, and 28c; in particular, the respective outer ends 30a of the respective arms 28a, 28b, and 28c are effectively connected to the respective sliding elements 38.

[0053] As can be seen in particular from the Fig. As is evident from Figure 4, each sliding element 38 has a bolt (not specified here) and a sliding shoe. The sliding shoe slides over the surface of the rear side 18r of the frame 18, with the bolt then providing the connection to the respective outer end 30a, as shown in Figure 4. Fig. 4 shown.

[0054] Out of Fig. 2 and also from the Fig. 1 and Fig. As shown in Figure 3, the components of the teaching 10 essentially interact functionally in a corresponding manner. The respective inner ends 30i of the respective arms 28 are arranged at a first equal radial distance to the centering axis Z, meaning they all have the same first distance to the centering axis Z. This first distance remains essentially constant even during a movement / rotation of the drive element 24.

[0055] The respective outer ends 30a all have a second, equal radial distance to the centering axis Z. This second radial distance of the outer ends 30a to the centering axis Z, i.e., the distance of each outer end 30a to the centering axis Z, is the same, but its value changes depending on the displacement / movement of the outer ends 30a along the sliding guides 34a, 34b, and 34c. Nevertheless, in the preferred embodiment of the teaching 10, all outer ends 30a always have the same radial distance to the centering axis Z; this should be noted. Finally, what has been said above, i.e., what was described for the outer ends 30a, also applies to the respective sensing and / or contact elements 32a, 32b, and 32c. These also all have a third, equal radial distance to the centering axis Z.Although this third distance can be changed depending on the rotational movement of the rotary drive element 24, the contact elements 32a, 32b and 32c always have the same radial distance to the centering axis Z. In particular, this arrangement and / or design of the sensing and / or contact elements 32 allows the tool 12 to be positioned centered on the workpiece 14 with a uniform radial displacement of the sensing and / or contact elements 32, or is positioned centered when the three sensing and / or contact elements 32 contact the workpiece surface 16, especially the outer, preferably cylindrical, circumferential surface 16a.

[0056] As from the Fig. As can be clearly seen in Figures 1 to 3, the first, second, and / or third contact elements 32a, 32b, and 32c, as well as the respective inner ends 30i and / or outer ends 30a of the respective arms 28, are spaced apart from each other circumferentially relative to the centering axis Z. In the preferred embodiment, the first, second, and third sensing and contact elements 32a, 32b, and 32c, as well as the inner ends 30i and outer ends 30a of the respective arms 28, are arranged and / or configured to be spaced apart from each other circumferentially at the same angle, in particular at 120°.

[0057] However, it is also conceivable that other circumferential distances and / or other angles could be implemented. For example, the first and second sensing and contact elements 32a and 32b can be arranged circumferentially offset from each other at a first angle α with respect to the centering axis Z, where, in particular, the first angle α is essentially 10° ≤ α ≤ 180°. Similarly, the second and third sensing and / or contact elements 32b and 32c can be arranged circumferentially offset from each other at a second angle β with respect to the centering axis Z, where, in particular, the second angle β is essentially 10° ≤ β ≤ 170°. Finally, the third and the first sensing and / or contact element 32c and 32a can be arranged circumferentially offset from each other at a third angle γ with respect to the centering axis Z, wherein in particular for the third angle γ, γ = 360° - α - β applies.

[0058] The inner ends 30i of the first and second arms 28a and 28b can be positioned circumferentially offset from each other in a first angle α with respect to the centering axis Z, such that the inner ends 30i of the second and third arms 28b and 28c are positioned circumferentially offset from each other in a second angle β with respect to the centering axis Z, and finally the inner ends 30i of the third and first arms 28c and 28a are positioned circumferentially offset from each other in a third angle γ with respect to the centering axis Z. For the first angle α, the following can essentially apply: 90° ≤ α ≤ 150° or 100° ≤ α ≤ 140° or 110° ≤ α ≤ 130°, and / or for the second angle β, the following can essentially apply: 90° ≤ β ≤ 150° or 100° ≤ β ≤ 140° or 110° ≤ β ≤ 130°. These are also corresponding possible embodiments.

[0059] As mentioned above, in the preferred embodiment the respective components, in particular the inner ends 30i, the outer ends 30a and the sensing and / or contact elements 32, are each spaced apart from each other at the same angle, in particular at an angle of α = β = γ by 120°, as shown in the Fig. 1 to 3 are visible.

[0060] For example, the Fig. Figure 2 shows that for most of a movement of the arms 28, at least then the inner ends 30i are positioned radially further inwards with respect to the centering axis Z than the respective outer ends 30a of the respective arms 28.

[0061] As mentioned above, the gauge 10 now has a receptacle 22 and / or holder for receiving and / or arranging the tool 12, or such a receptacle 22 and / or holder is present. The tool 12 can now be arranged in the receptacle 22 and / or in the holder such that the tool 12 can be arranged and / or is movably arranged on and / or substantially concentric to a centering axis Z of the gauge 10.

[0062] As can be seen particularly from the Fig. 2 and Fig. As can be seen in Figure 4, the receptacle 22 and / or the holder is provided and / or formed in the rotary drive element 24.

[0063] Especially from the Fig. Figure 4 shows that the receptacle 22 and / or the holder is provided and / or formed in the star wheel 24v and / or in the rotary handle 24h. The rotary drive element 24 has a through-hole 40 for receiving the tool 12. Here, the through-hole 40 forms at least part of the receptacle 22 and / or the holder for the tool 12. The through-hole 40 is essentially concentric with the centering axis Z. Fig. Figure 4 shows that in particular the pull star 24v and the rotary handle 24h have the through hole 40, in which the tool 12 is then arranged.

[0064] In particular, a tool 12 is inserted and / or insertable into the receptacle 22 and / or holder such that it is displaceable relative to the receptacle 22 and / or holder, in particular substantially concentrically to the centering axis Z. In the preferred embodiment, the tool 12 is inserted and / or insertable into the through-hole 20 with substantially no radial play, such that a longitudinal axis of the tool 12 lies substantially on the centering axis Z.

[0065] The tool 12 can be configured, in particular, as a center punch, a drill bit, or a writing stylus. It is also conceivable that the tool 12 is configured as a laser emitter and / or a laser sensor, and therefore, at least partially, as a measuring tool. Other configurations of the tool 12 are also possible and conceivable, depending on the application and purpose.

[0066] From the Fig. Figure 4 makes it clear that the movement of the tool 12 along the centering axis Z is possible; in particular, movement of the tool 12 essentially along the centering axis Z in the direction of the front face 18v of the frame 18 against a spring force is possible. Or, in other words, a spring or spring element (not shown in the figures) is provided that pushes the tool 12 back into its initial position after it has been actuated, so that an automatic return movement of the tool 12 to its initial position after its actuation is possible.

[0067] Is the tool 12, as in Fig. 4 shown, for example as a grain, then after the gauge 10 can be attached, for example, to the end face of the in Fig. The workpiece 14 shown in Figure 1 has been placed on the workpiece, and the sensing and / or contact elements 32a, 32b, and 32c then contact the outer cylindrical surface 16a during a corresponding rotational movement of the drive element 24, or the workpiece 14 has then been gripped and clamped in this manner. Using the tool 12, which is preferably designed as a center punch, the center point of the workpiece 14 thus determined is then marked. For this purpose, the tool 12, which is preferably designed as a center punch, is used. Fig. 4. The right end of the tool 12 shown, for example, is then subjected to force with a hammer, so that the tool 12 is moved / pressed from its starting position (from the right) to a position further to the left, so that the in Fig. 4. The left end of the tool 12, i.e., its tip, "punches" the center point of the end face of the workpiece 14. After applying the appropriate force, the tool can then be used to... (not shown here) Fig. The spring shown in Figure 4 moves the workpiece 12 back to its starting position.

[0068] From the above explanations, it is evident that with the teaching 10 according to the invention, the center point of an end face of the workpiece 14 can be located easily and without significant effort, and this center point can then be marked, for example, by center punching, using a tool 12 in the teaching 10. Therefore, with the aid of the teaching 10 according to the invention, the corresponding tool 12 can be positioned centrally to the workpiece 14, and the tool itself can then be operated easily.

[0069] In another embodiment not shown here, it is conceivable that the tool 12 is partially designed as a measuring tool, for example as a laser emitter and / or laser sensor. Such a tool can be positioned centrally in the open end of a tube. Preferably, at both ends of the open tube, a corresponding tool or tools can be positioned using two tools 10 according to the invention so that the curvature or curvature profile of the tube can then be measured.

[0070] In particular, it should be pointed out again at this point that in the Fig. In the preferred embodiment of the teaching 10 shown in Figures 1 to 4, the workpiece surface 16, in particular the outer surface 16a, is contactable or graspable by the sensing and / or contact elements 32. However, the opposite case is also conceivable, for example, that in the case of a tube, the inner surface is contactable or graspable by the sensing and / or contact elements, and thus the workpiece can be clamped.

[0071] With the aid of the sensing and / or contact elements 32, the workpiece 14 is therefore contacted via its workpiece surface 16, in particular via its outer or inner surface, or “clamped” in such a way that the tool 12 is then positioned centrally and / or positionable relative to the workpiece 14.

[0072] Therefore, there are many possible applications for the [product / service] in the Fig.The teaching 10 shown in Figures 1 to 4, in particular also depending on the type of tool 12 used here, may be expressly pointed out again at this point. Reference symbol list: 10 Teaching 12 tools 14 workpieces 16 workpiece surface 16a outer surface of 14 18 frame 18a Guide Star 18v / 18r Front / Back of 18 22 Mount / Holder 24 Rotary drive element 24v front section, star wheel of 24 24h rear section, rotary handle of 24 28 arms 28a / b / c first / second / third arm 30i / 30a inner end / outer end of 28 32 Touch and / or contact element 32a / b / c first / second / third tactile and / or contact element or first / second / third contact pin 33 Storage 34 Sliding guide 34a / b / c first / second / third sliding guide 36 slotted hole of 34 38 sliding element of 34 40 through hole of 24 M central axis of 14 Z centering axis of 10 α / β / γ first / second / third angle about Z

Claims

[1] Teaching (10) for the centered positioning of a tool (12), in particular a center punch, a drill, a pen, a laser emitter and / or a laser sensor, on a workpiece (14) having, in particular a circular cylindrical cross-section, a workpiece surface (16), in particular an inner or outer cylindrical surface (16a), and / or an axis, in particular a central axis (M), in particular on a semi-finished product, or on a rod or on a tube, characterized bythat the gauge (10) has a tool (12) and / or a tool (12) can be arranged and / or attached to the gauge (10), that the gauge (10) has a frame (18), a rotary drive element (24) and a first, a second and a third arm (28a, 28b, 28c), wherein the rotary drive element (24) is rotatably mounted on the frame (18) and each arm (28a, 28b, 28c) has an inner end (30i) and an outer end (30a), wherein the inner ends (30i) are functionally coupled and / or connected to the rotary drive element (24) and the outer ends (30a) are guided on the frame (18) so as to be movable substantially in the radial direction, wherein a sensing and / or contact element (32) is arranged and / or formed, and thus a first, a second and a third sensing and / or contact element (32a, 32b, 32c) is available for contacting the workpiece surface (16) of the workpiece (14),and wherein, with a corresponding movement of the first, second and / or third arm (28a, 28b, 28c), the workpiece surface (16) of the workpiece (14) can then be contacted and / or the workpiece (14) can be clamped and / or gripped in such a way as to allow the tool (12) to be positioned centrally on the workpiece (14) and / or be positioned centrally. [2] Teaching according to claim 1, characterized by , that the frame (18) is designed as a guide star (18a). [3] Teaching according to one or more of the preceding claims, characterized by that the rotary drive element (24) has a pull star (24v) and / or a rotary handle (24h). [4] Teaching according to one or more of the preceding claims, characterized by, that the frame (18) has a front (18v) and a back (18r), wherein the first, second and third arms (28a, 28b, 28c) are arranged on one side of the frame (18), in particular on the front (18v) of the frame (18). [5] Teaching according to one or more of the preceding claims, characterized by , that the rotary drive element (24) extends at least partially through the frame (18). [6] Teaching according to one or more of the preceding claims, characterized by , that a bearing (33) and / or sliding guide is realized, arranged and / or designed between the rotary drive element (24) and the frame (18) so that the rotary drive element (24) is rotatable relative to the frame (18). [7] Teaching according to one or more of the preceding claims, characterized by, that the rotary drive element (24) has a front section located on the front (18v) of the frame (18) and a rear section located on the back (18r) of the frame (18). [8] Teaching according to one or more of the preceding claims, characterized by , that the rotary drive element (24) has the front section and the rear section as an integral component. [9] Teaching according to claim 8, characterized by that the front section and the rear section are each provided and / or designed as separate components and that the front section is effectively coupled and / or firmly connected to the rear section. [10] Teaching according to one or more of the preceding claims, characterized by, that the rear section is designed as a rotary handle (24h) which extends outwards from the rear (18r) of the frame (18) and can be grasped by a user there, and that the front section is designed as a pull star (24v) which is essentially arranged and / or designed on the front (18v) of the frame (18). [11] Teaching according to one or more of the preceding claims, characterized by , that the rear section is partially disc-shaped and / or plate-shaped, wherein the rear section can then be rotatably driven manually and / or electrically, in particular with a cordless screwdriver. [12] Teaching according to one or more of the preceding claims, characterized by , that the first, second and / or third arm (28a, 28b, 28c) with their respective inner ends (30i) are pivotably mounted on the front section of the rotary drive element (24), in particular on the star wheel (24v). [13] Teaching according to one or more of the preceding claims, characterized by , that the first, second and third sensing and / or contact elements (32a, 32b, 32c) are substantially parallel to each other and / or are arranged and extend from the front (18v) of the frame (18) at the respective outer end (30a) of the respective first, second and / or third arm (28a, 28b, 28c). [14] Teaching according to one or more of the preceding claims, characterized by , that with the help of the first, second and / or third sensing and / or contact element (32a, 32b, 32c) the workpiece surface (16), in particular the outer cylindrical surface (16a), of the workpiece (14) can be contacted, clamped and / or grasped. [15] Teaching according to one or more of the preceding claims, characterized by, that the respective first, second and / or third sensing and / or contact element (32a, 32b, 32c) is arranged and / or formed in the area of ​​the respective outer end (30a) of the respective first, second and / or third arm (28a, 28b, 28c). [16] Teaching according to one or more of the preceding claims, characterized by , that sliding guide means are provided and / or present, such that the frame (18) has a first, a second and a third sliding guide (34a, 34b, 34c), wherein the respective first, second and third sliding guide are assigned to the respective first, second and third arm (28a, 28b, 28c), such that the respective outer end (30a) of the respective first, second and third arm (28a, 28b, 28c) can be functionally connected and / or slidably to the frame (18). [17] Teaching according to one or more of the preceding claims, characterized by, that the respective outer ends (30a) are moved towards the centering axis (Z) when the rotary drive element (24) is rotated relative to the frame (18) in a first direction, and then away from the centering axis (Z) when the rotary drive element (24) is rotated relative to the frame (18) in a second direction - opposite to the first direction. [18] Teaching according to one or more of the preceding claims, characterized by , that the sliding guides (34a, 34b, 34c) are essentially linear and run essentially radially to the centering axis (Z). [19] Teaching according to one or more of the preceding claims, characterized by, that each sliding guide (34a, 34b, 34c) is formed and / or realized by an elongated hole (36) and a sliding element (38), wherein the elongated holes (36) are formed in the frame (18) and the respective sliding elements (38) are functionally effectively connected to the respective arms (28a, 28b, 28c), in particular the respective outer ends (30a) of the respective arms (28a, 28b, 28c) are effectively connected to the respective sliding elements (38). [20] Teaching according to one or more of the preceding claims, characterized by , that the respective inner ends (30i) are located at a first equal radial distance to the centering axis (Z), that the respective outer ends (30a) are located at a second equal radial distance to the centering axis (Z), and that the respective sensing and / or contact elements (32a, 32b, 32c)) are located at a third equal radial distance to the centering axis (Z) and / or are arranged accordingly. [21] Teaching according to one or more of the preceding claims, characterized by , that the first and the second sensing and / or contact element (32a, 32b) are arranged circumferentially offset from each other at a first angle α with respect to the centering axis (Z), in particular wherein the first angle α is essentially 10° ≤ α ≤ 180°, that the second and the third sensing and / or contact element (32b, 32c) are arranged circumferentially offset from each other at a second angle β with respect to the centering axis (Z), in particular wherein the second angle β is essentially 10° ≤ β ≤ 170°; and that the third and the first sensing and / or contact element (32c, 32a) are arranged circumferentially offset from each other at a third angle γ with respect to the centering axis (Z), in particular wherein the third angle γ is γ = 360° - α - β. [22] Teaching according to one or more of the preceding claims, characterized by, that the inner ends (30i) of the first and second arms (28a, 28b) are positioned circumferentially offset from each other in a first angle α with respect to the centering axis (Z), that the inner ends (30i) of the second and third arms (28b, 28c) are positioned circumferentially offset from each other in a second angle β with respect to the centering axis (Z); and that the inner ends (30i) of the third and first arms (28c, 28a) are positioned circumferentially offset from each other in a third angle γ with respect to the centering axis (Z). [23] Teaching according to one or more of the preceding claims, characterized by , that for the first angle α, it is essentially 90° ≤ α ≤ 150° or 100° ≤ α ≤ 140° or 110° ≤ α ≤ 130°; and / or for the second angle β, it is essentially 90° ≤ β ≤ 150° or 100° ≤ β ≤ 140° or 110° ≤ β ≤ 130°. [24] Teaching according to one or more of the preceding claims, characterized by, that for the first, second and third angles α, β and γ, essentially α = β = γ = 120° holds true. [25] Teaching according to one or more of the preceding claims, characterized by , that the inner ends (30i) are located radially further inwards with respect to the centering axis (Z) than the respective outer ends (30a). [26] Teaching according to one or more of the preceding claims, characterized by , that a receptacle (22) and / or holder for receiving and / or arranging the tool (12) is provided, wherein the tool (12) can be arranged in the receptacle (22) and / or holder such that the tool (12) can be arranged and / or movably arranged on and / or substantially concentric to a centering axis (Z) of the gauge (10). [27] Teaching according to one or more of the preceding claims, characterized by, that the receptacle and / or the holder (22) is provided and / or formed in the rotary drive element (24). [28] Teaching according to one or more of the preceding claims, characterized by that the receptacle (22) and / or the holder is provided and / or designed in the star wheel (24v) and / or in the rotary handle (24h). [29] Teaching according to one or more of the preceding claims, characterized by , that the rotary drive element (24) has a through hole (40) for receiving the tool (12) and / or the through hole (40) at least partially forms the receptacle (22) and / or the holder, wherein the through hole (40) is substantially concentric to the centering axis (Z) and / or is designed, in particular the pull star (24v) and the rotary handle (24h) have the through hole (40). [30] Teaching according to one or more of the preceding claims, characterized by, that the tool (12) is inserted and / or can be inserted into the receptacle (22) and / or holder in such a way that it is displaceable relative to the receptacle (22) and / or holder, in particular substantially concentric to the centering axis (Z). [31] Teaching according to one or more of the preceding claims, characterized by , that the tool (12) is inserted and / or usable in the through hole (40) essentially without radial play such that a longitudinal axis of the tool (12) lies essentially on the centering axis (Z). [32] Teaching according to one or more of the preceding claims, characterized by , that the tool (12) is designed as a center punch, as a drill, as a writing pen, as a laser emitter and / or a laser sensor, in particular also partly as a measuring tool. [33] Teaching according to one or more of the preceding claims, characterized by, that a movement of the tool (12), which is designed in particular as a center punch or writing stylus, is realized essentially along the centering axis (Z) in the direction of the front (18v) of the frame (18) against a spring force, in particular so that after an actuation of the tool an automatic return movement of the tool (12) to its starting position is possible.

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