ES2666652T3 - Procedure to determine the drilling depth of a drill of a bulb core - Google Patents

Abstract

Procedure for determining the drilling depth (B) of a shortened core bore (6) to be performed in a core (2) of a closing bulb, in which the finished bulb core (2) has a key channel (3) that eventually forms a profiled rib (19), and in the shortened core bore (6) a core pin (7) having a tip (7 '') with an adjacent head surface (7) is placed to this and especially made in a conical or rounded form, and in which it is fulfilled that, in the presence of a conjugate key not plugged into the key channel (3) or in the presence of a blow key (15) plugged into the channel of key (3), the tip (7 '') of the core plug (7) has a distance (S) to the mouth (6 '') of the shortened core bore (6) as a result of a seat of the head surface (7 ') in at least one seat point (P) of the wall (3') of the key channel (3), characterized in that a drill bit is used whose contour (8) of the cross section of the head has an opening angle (β) greater than the opening angle (/ alpha;) of the contour (9) of the cross section of the head of the core plug (7), and because it comprises the following steps: - projecting the contour (9) of the cross-section of the head of the core plug (7) in a cross-sectional plane of the key channel (3) that passes through the center line (Z ) of the core drill (6) such that the tip (7 '') of the projection of the core plug (7) has the desired distance (S) to the mouth (6 '') of the core drill (6); - locate the point of intersection or contact (P) closest to the tip (7 '') of the projection of the core plug (7) between the line (9 ') of the cross-sectional contour (9) of the head of the core plug (7) and the line (3 ') of the cross section contour of the key channel (3); - project the contour (8) of the cross-section of the drill head in the cross-cutting plane such that its tip (6 '') is located in the center line (Z) and its contour line (8 ' ) go through point (P).

Description

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DESCRIPTION

Procedure to determine the drilling depth of a drill of a bulb core.

The invention concerns a method for determining the drilling depth of a shortened core drill that must be practiced in a core of a closing bulb, in which the finished core of the bulb has a key channel that eventually forms a profiled nerve. which penetrates the key channel, and in the shortened core bore is a core pin that has a tip with a head surface adjacent to it and specially configured in a conical or rounded shape, and in which it is fulfilled that, in the presence of a conjugate key plugged into the key channel or in the presence of a blow key plugged into the key channel, the tip of the core plug has a certain distance to the mouth of the shortened core drill as a result of the seat of the head surface at at least one seat point of the key channel wall.

A closing bulb, such as the one shown, for example, documents DE 10 2004 045792 A1, EP 1 707 711 A2 or EP 0 771 920 A1, has a housing and one or two holes in this housing. A bulb core is housed in the housing bore. The core of the bulb cannot be turned when the key is not plugged in, since its turning movement is impeded by a pin. If a conjugate key is plugged into the key channel of the closing bulb, a pair of pin holes located in drills transverse the axis of rotation of the bulb core are arranged so that the core of the bulb can be rotated. Together with the bulb core, a closing member coupled to rotate with the bulb core is also rotated. The housing pins that, in the locked position, cross the turning joint between the bulb core and the housing bore are driven into the housing holes by the conjugate key inserted into the key channel. This is done against the restoring force of a borja spring. The notches of the flat key plugged into the key channel, which represent the secret of the key, are explored by the tips of the core pins, the length of the core pins being adapted to the depth of the respective notch. The tips are located inside the notches when a conjugate key is completely plugged in.

There are different inadmissible opening methods with which, despite everything, an attempt is made to operate a closing bulb that can generally only be closed with a conjugate key. The blow wrench method works with a specially prepared blow wrench. The notches of this punch wrench are cut to the deepest level or even a step jump beyond the deepest level. However, the keyhole notches are generally cut to the same level. The thus prepared seat post of a blow wrench is plugged into the key channel of the closing bulb in such a way that its oblique flanks are applied to the oblique flanks of the tips of the core pins. If a blow is now struck on the key, a pulse is transmitted to the core plugs. The core plugs transmit this impulse to the housing plugs. If the housing pins are separated from the core pins, the block against rotation of the bulb core is canceled for a short time, since none of the housing pins already crosses the turning joint. In order to make this opening method difficult, it is proposed, for example, in the document DE 102 007 019 714 not yet published to configure with a reduced depth the core bore of at least one core pin, the drilling depth being adapted to the position of the top lines of the notches of an adjacent punch wrench on oblique flanks that transition from one to the other in such a way that there is a distance between the tooth ends and the tip of the core pin placed inside the shortened core bore. In the key stroke method, no impulse is transmitted to this core pin as a result of such an execution, whereby the corresponding housing pin does not lose its locked position.

The method of opening by the punch key does not only include the use of punch keys in which all the notches are cut to the deepest level. In addition, blow keys are also used in which the depth of the notches corresponds not only to the zero step jump but also to the first step jump, to the second, to the third. The vertex lines of the notches adjacent to oblique flanks coinciding with each other penetrate here at a corresponding depth in the key channel in the direction of the mouth of the core bore. Therefore, the distance between these teeth and the tip of the core pin placed inside the shortened core bore can become negative, with the consequence that this core pin can also be requested with pulses. In order to prevent also with this method an opening of the closing bulb, it is necessary that, in the conception of the closing secret, at least one core plug placed inside a core hole of normal depth is configured with a length such that said pin crosses the separation joint when a blow wrench of this kind cut at a lower depth is used.

Therefore, the position of the core pin placed inside the shortened core drill is critical with respect to the anti-voiding safety of the lock with the punch wrench method. Since the center line of the core bore generally runs through the key channel, the core pins, unlike what is represented in DE 102 007 019 714, do not rest on a nerve with the tip, but they are supported with a flank area of the tip in a ridge of the wall of the key channel that can correspond to the flank of a nerve. Only when the contour of the cross-section of the drill head that produces the core drill coincides with the contour of the cross-section of the head of the core plug placed therein, the drilling depth corresponds to the position of the tip of the core plug.

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Therefore, the invention is based on the problem of indicating a method for determining the drilling depth of shortened core holes in which the core pin occupies a target position even when the contour of the cross-section of the drill head deviate from the contour of the cross section of the head of the core plug.

The problem is solved with the invention indicated in claim 1.

First and substantially, it is proposed that it be projected graphically or, using an electronic data processing facility, the contour of the cross-section of the head of the core plug is projected electronically into a cross-sectional plane of the channel of the key. The plane of the cross-section runs through the center line of the core drill. The contour of the cross-section of the head of the core plug is positioned in such a way in the plane of the cross-section of the key channel that the tip of the cross-section contour of the head of the core plug has the desired distance to the mouth of the core drill. An intersection point can be deduced from this projection that has the contour line of the cross section of the head of the core plug and the contour line of the cross section of the key channel. It can be a point of contact here. The point of intersection or contact closest to the tip of the core plug is searched between the contour line of the cross section of the head of the core plug and the contour line of the cross section of the key channel. Once this point P has been found, the contour of the cross section of the drill head is projected in the plane of the cross section of the key channel. This is done in such a way that its tip is located in the center line and its contour line runs through the same point P. To locate this position you can move the contour of the cross section of the head of the drill in axial line towards the center line Z until its contour line is cut with the previously obtained point of contact or intersection. The position then found of the tip of the contour of the cross-section of the drill head defines the drilling depth with which the shortened core drill has to be made so that the core pin placed therein has its predetermined position. During the fabrication of the core of the closing bulb, the latter is first fitted to the outer contour, in particular with a chip removal procedure. Next, the core holes that extend substantially radially to the axis of rotation of the bulb core are drilled. At least one of these core drills is shortened. Next, the key channel is produced with a brush tool. Finally, a deburring can be performed. With the process according to the invention it is possible to produce the shortened core drill in a closing bulb with a pressure such that, even without a support of the tip of the core pin, the latter is placed in the predetermined position, since the drilling depth deviates from the penetration depth of the core plug in the shortened hole for it. It may also be provided here that, in the presence of shallow grooves of the tap key, at least one normal core pin crosses the plane of separation between the bulb core and the drill when the tap key is inserted. If S is called the distance between the position of the tip of the core plug placed inside the shortened core hole and the hole of the hole for the core pin, D the diameter of the bulb core, T the distance of a top of flank of two contiguous notches in a punch wrench to its rear side, L the length of a longer core plug, which is placed inside a non-shortened core bore, and E the distance of a notch vertex, that is , the notch depth from the back of the key, then results in the following pair of inequalities:

S <D-T or L> D -E.

These have to be fulfilled so that a blow wrench, in which all the notches have been cut with the same depth, do not request with impulses to at least one core plug, or so that at least one core plug is driven by the spanner to a crossing position of the separation plane. To determine the desired distance S from the tip of a pin placed inside a shortened core drill, the following procedure can be applied. The longest core pin and the shortest core pin of the respective closing situation are determined. The core hole in which the shortest core pin is placed to cut it shortened is selected. The desired distance S from the tip to the mouth of the core bore is determined according to the formula S <L + E-T.

Next, exemplary embodiments of the invention are explained with the aid of the accompanying drawings. They show:

Figure 1, the front view of a closing bulb,

Figure 2, a section according to line 11-11 through a light bulb core equipped with pin blades and placed inside a core hole, with a key not plugged in,

Fig. 3, a representation according to Fig. 2 with plug-in tap key,

Figure 4, an enlarged representation according to fragment IV of Figure 3,

Figure 5, a section according to line V-V of Figure 3,

Figure 6, a section according to line VI-VI of Figure 3,

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Figure 7, a schematic representation to describe the procedure for determining the drilling depth B,

Figure 8, a strongly enlarged representation similar to Figure 7 with a key channel profiled in another way,

Figure 9, a representation according to Figure 8 with a key channel profiled in another way,

Figure 10, a representation according to Figure 8 with an additionally profiled key channel and Figure 11, a strongly enlarged representation of Figure 5.

The closing bulb shown in the drawings has a housing 1 that has two core holes aligned with each other. Between the two core holes a closure member 14 is placed in a notch. This closing member 14 is coupled for rotation, by means of a coupling not shown, with one of the two bulbs 2 that are plugged into the core holes, provided that the conjugate key is plugged into the key channel 3 of the core bulb 2. The coupling can be done with the tip of the key.

The bulb core 2 has in the drawings a total of four core holes 4 that extend substantially in the radial direction with respect to its axis of rotation and have a maximum drilling depth. More than four core 4 holes of this class may also be provided. In addition to these core drills 4 drilled at a normal depth, at least one core plug bore 6 whose depth has been shortened is provided.

A correspondingly shorter core plug 7 is placed in this core pin hole. In the core pin holes 4 adjacent thereto, cut to a normal depth, a respective core pin 5 is placed. The length of the core pins 5, 7 defines the secret of the key. For each core plug 5, 7 there is a corresponding housing plug 11 that is placed in a hole 13 of the housing and is requested by a plug spring 12 in the direction of the bulb core 2. When the key is not plugged in ( see figure 2), the housing pins 13 cross the turning joint between the bulb core 2 and the housing bore.

Only when a conjugate key is plugged in, which is not shown in the drawings, the separation plane between the core plugs 5, 7 and the associated housing plugs 11 is located in the separation joint, which can be done Turn the bulb core 2 into the housing bore.

Figure 3 shows a blow key 15 plugged into the key channel 3. The notches 16 have the deepest level there. In figures 4 and 11, the notch depth is designated with the letter E as the measure of the distance between the vertex of the notch 16 and the spine 15 'of the punch key. The top lines 17 of the oblique edges of adjacent notches 16 penetrate minimally into the key channel in the direction of the mouth 6 '' 'of the core holes 4, 6. In figure 4 the letter T has been designated with the letter T distance between the top line 17 of two flanks adjacent to the spine 15 of the key. It can be seen in Figure 1 that the tip 7 '' of the core plug 7 placed inside the shortened core bore 6 is supported by a profiled rib 10. The tip 6 '' has, as shown in Figure 4, a distance A to the top line 17 of the blow key 15. If a blow is struck on the blow key that is plugged into the key channel 3 according to figure 3, a pulse is transmitted to the tips of the pins of core 5 through the seat of the oblique surface of the oblique flanks of the notches 16, which has the consequence that the housing pins 11 are separated from the core pins and then fully driven into the pin holes 13 of housing associated with them. Because of the distance A, no impulse is transmitted to the core pin 7. Figure 7 shows in an enlarged representation the seat of the tips 7 '' of the core pins in a profiled nerve 10. In this constellation the depth of drilling does not correspond to the penetration depth of the core pin 7 in the hole 6 for it.

Usually, the angles of the tip of the core plug 7 and the drill differ from each other. The angle a of the tip of the core plug, that is, the angle at which the contour lines 9 of the cross-section of the head of the core plug 7 meet at the tip 7 '' of the core plug , is generally smaller than the angle p of the contour 9 of the cross section of the drill head. The angle a may be in the range between 90 ° and 110 °. The angle p is usually worth 120 °. Therefore, if the constructed core tip 7 '' is located in the free space of the key channel 3, the core plug 7 does not rest with its tip 7 '' on the material, for example on a rib 10. on the contrary, the zone of the tip of the core plug 7 rests on the flank area of the tip, that is, on the area of the flank line 7 'on a wall section 3' of the key channel 3 When a drill is used whose contour 8 of the cross section of the head has an opening angle p greater than the opening angle a of the contour 9 of the cross section of the head of the core plug 7, this leads, in the presence of A constellation of this kind, that the position of the tip 7 '' of the core plug 7, as shown in Figure 7, is located deeper in the bore 6 of the core plug than the tip 6 '' which determines the drilling depth B.

Therefore, there is the problem of predicting the drilling depth B so that the core plug 7 placed inside the core bore 6 has with its tip 7 'the desired distance S to the mouth 6' '' of the core bore shortened 6.

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To determine the drilling depth B, a procedure based on a graphic projection and preferably performed in an electronic data processing facility is used. First, the contour 9 of the cross-section of the head of the core plug 7 is projected on a cross-sectional plane of the key channel 3 that passes through the center line Z of the core bore 6 such that the tip 7 '' have the desired distance S to the mouth 6 'of the core bore 6. This distance may be the same for closing bulb cores 2 of a given series. However, the key channels 3 of the closing bulb cores 2 of a series and especially of a closing installation differ from their ribbed structure, since the profiled ribs 10 are used to vary the closing secret. Only those keys that have a corresponding groove can be plugged into a key channel 3 at the site where the key channel 3 has a profiled rib 10. Since the key channels 3 of different closing bulbs of a closing installation they have a different arrangement of the profiled ribs, it is not assured that the tip 6 '' of the core bore 6 is located in the area of a nerve. Therefore, the support of the core pin 7 is generally carried out at some point P located on the conical or rounded contour of the tip of the core pin 7. To locate this point, the contour 9 of the cross-section of the head of the the core plug 7 in the manner described above in the plane of the cross section of the key channel 3. Next, an intersection or contact point P is sought in which the contour line 9 'of the cross section 9 of the head of the core piece 7 cut or touch the contour line 3 'of the cross section of the key channel 3. The intersection or contact point P closest to the tip 7' 'of the core pin 7 is then searched .

In a subsequent step, the contour 8 of the cross-section of the head is projected in the cross-sectional plane such that the tip 6 '' is located in the center line Z of the core bore 6. Thus, the points 6 ' 'and 7' 'are located on the same central line Z. Since point P is fixed by the preceding construction step, the axial position of point 6' 'of the tip of contour 8 of the cross-section must now be displaced of the drill along the central line Z until the line 8 'of the contour 8 of the cross section of the drill head also passes through the point P. The point P is then the fulcrum at which the Conical envelope-shaped tip structure or the rounded tip contour of the tip of the core plug 7 rests on a projection of the key channel 3, that is, especially on a wall section 3 'of the key channel or in a section of a profiled nerve 10. It has been determined so drill depth B.

Figures 8 to 10 show that the procedure can be applied to key channels 3 of different profiles, provided that the position of point 7 '' of the tip of the core pin deviates each time from the position of point 6 '' of the tip of the drill or the depth of penetration B of the drill. In the exemplary embodiment shown in Figure 8 a section of the conical area of the tip of the core plug 7 is supported on a profiled rib 10.

In the exemplary embodiment shown in Figure 9 there is a first support point P on the left side of the key channel 3 and a second support point P 'on the right side of the key channel 3. Point 6' ' of the tip of the drill is also located here in the free space of the key channel 3.

In the example shown in Figure 10, there are two support points P, P 'in the cross-sectional plane of the bulb core 2, which are each associated with one side 3' of the key channel 3.

The diameter D of the bulb core 2 has been designated with D in Figure 11. To ensure the greatest possible safety, the following pair of inequalities must be taken into account for the interlocking of the closing bulb: S <D - T or L> = D - E, where L is the measure of the length of a normal core pin 5, as shown in Figure 11. Whenever the first inequality is met, it is ensured that the top line 17 has a distance A to the tip 7 '' of the core plug 7. Therefore, this core plug 7 that plugs into a shortened core bore 6 is not touched by a blow wrench in which the top lines 17 are away from the spine 15 'in the measure T. Accordingly, the housing pin belonging to the core plug 7 cannot be moved with a blow key 15 of this kind in a blow key opening method. The second inequality must be met in the case where the distance T from the top line 17 to the spine 15 'of the key is so large that a distance A is not present, that is to say that a strike key 15 of this kind is not A pulse can be transmitted to the core plug 7. Thanks to the second inequality, it is ensured that a small translation of the normal core plug 5 with the length L leads to an entry of this core plug 5 into the housing bore, which produces a blocking action here.

The procedure for determining the drilling depth B for the shortened core bore 6 is preceded by a determination of the position of the tip 7 '' of the core pin, that is, a determination of the measure S from which drilling depth B is then obtained by means of the procedure described above. Measure S has to be chosen so that the top line 17 distanced from the spine 15 'of the key in measure T has a distance A to the tip 7' '. If this no longer occurs, the sum of the distance from the notch vertex to the spine 15 'of the key, that is, the measure E, with the measure of the length L of the core plug 5 that is plugged into this hole of core has to be larger than the diameter D of the bulb core 2.

The bulb cores are equipped with different length core plugs, since the length of the core plugs and their arrangement determine the secret of the key. For this reason, in a refinement of the procedure, it is foreseen that the length L of the longer core pin and the length of

Length of the shortest core plug. The shortened core drill is then associated with the shorter core plug and the S measurement, which means the desired distance from the tip 7 '' of the core plug 7 to the mouth 6 '' 'of the

core drill 6, is determined according to the following formula: S <= L + E - T, and then the holes are drilled

core holes 4, 6, receiving the hole 6 associated with the shorter core pin 7 a depth of

5 perforation B which, especially according to claim 1, is derived from the desired distance S.

The distance S should preferably be smaller, at least to the extent of a step jump, that is, 0.5 mm, than L + E-T so that in a stroke wrench correspondingly fitted with a notch under the pin Longer normal core with at least 0.5 mm cross the separation plane. The difference T - E, which corresponds to the projected distance on the center line between the notch vertex 16 and the top lines 17, can be calculated using the following formula:

T -E = C / (2 ■ tg (y / 2))

With C, the distance of two adjacent pin vertices, measured in the direction of extension, has been designated here. This distance corresponds to the distance of two adjacent core holes. With the angle and the angle of the two notch flanks that converge at a vertex 16 is designated (see Figure 4). This angle is comprised between 90 ° and 120 °. Therefore, by prefixing a minimum value for the angle and the maximum possible value of the distance T-E can be obtained, without having to know the stroke key.

Claims (7)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. Procedure for determining the drilling depth (B) of a shortened core bore (6) to be performed in a core (2) of a closing bulb, in which the finished bulb core (2) has a channel of key (3) that eventually forms a profiled rib (19), and in the shortened core bore (6) a core pin (7) having a tip (7 '') with a head surface (7) is placed ) adjacent to it and made especially in a conical or rounded shape, and in which it is fulfilled that, in the presence of a conjugate key not plugged into the key channel (3) or in the presence of a blow key (15) plugged into the key channel (3), the tip (7 '') of the core plug (7) has a distance (S) to the mouth (6 '') of the shortened core bore (6) as a result of a head surface seat (7 ') in at least one seat point (P) of the wall (3') of the key channel (3), characterized in that a br oca whose contour (8) of the cross section of the head has an opening angle (p) greater than the opening angle (a) of the contour (9) of the cross section of the head of the core plug (7), and Why do you understand the following steps: - project the contour (9) of the cross-section of the head of the core plug (7) in a cross-sectional plane of the key channel (3) that passes through the center line (Z) of the core bore (6) such that the tip (7 '') of the projection of the core plug (7) has the desired distance (S) to the mouth (6 '') of the core bore (6); - locate the point of intersection or contact (P) closest to the tip (7 '') of the projection of the core plug (7) between the line (9 ') of the cross-sectional contour (9) of the head of the core plug (7) and the line (3 ') of the cross section contour of the key channel (3); - project the contour (8) of the cross-section of the drill head in the cross-cutting plane such that its tip (6 '') is located in the center line (Z) and its contour line (8 ' ) go through point (P). 2. Procedure for drilling a shortened core drill (6) into the core (2) of a closing bulb, characterized by a determination of the drilling depth (B) according to claim 1 and a subsequent drilling of the core drill ( 6). 3. The method according to claim 2, characterized in that, after the bulb core (2) has been put in shape, especially by machining with chip removal, a plurality of core holes (6, 4) are first produced ) which extends substantially radially with respect to the center of rotation of the bulb core (2), at least one shortened bore according to claim 2 being produced and then the key channel (3) being produced, especially by broaching. 4. Method according to claim 2, characterized in that the key channel (3) is produced before drilling the core holes (6, 4), especially by broaching. 5. Method according to any of the preceding claims, characterized in that the depth (B) of the shortened core bore (6) is chosen so that the tip (7 '') of the core plug (7) placed inside the borehole of shortened core (6) present a distance (A) to the top line (17) of two oblique flanks of adjacent notches (16) of a punch key (15) plugged into the key channel (3). Method according to any one of the preceding claims, characterized in that the distance (S) between the tip (7 '') of the core plug (7) placed inside the shortened core bore (6) and the mouth (6 ' '') of the core bore (6) is smaller than the difference between the diameter (D) of the bulb core (2) and the distance (T) of a flank top line (17) to the spine (15 ' ) of the key, or because the length (L) of another core pin (4) is greater than the difference in the diameter (D) of the bulb core (2) and the distance (E) from the vertex line ( 16) of the notch associated with the spine (15 ') of a blow wrench (15). 7. Procedure for drilling the core holes (4, 6) into a core (2) of a closing bulb, in which the length (L) of the longest core pin (5) and the position is first determined of the shortest core plug (7), the desired distance (S) of the tip (7 '') of the shortest core plug (7) is determined according to the following formula: S <= L + E - T , where (T - E) is the projected distance on the center line (Z) of the core bore (6) between the vertex lines (16) of the notch flanks and the top lines (17) of the flanks of notching two adjacent notches of a punch wrench (15), whose vertex lines (16) of the notches are located substantially at a common level, and this distance can be determined according to the formula T - E = C / (2 * tg (y / 2)), where C is the distance of two adjacent core holes and and is between 90 and 120 °, and then the holes are drilled s of core (4, 6), the hole (6) associated with the shortest core pin (7) being made up to a drilling depth (B) which is determined according to the method of claim 1 taking into account the difference between the outline (9) of the cross section of the head of the core plug (7) and the outline (8) of the cross section of the head of the drill bit.