Tool carriage adjustment device and method for tool carriage adjustment
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CERATIZIT BESIGHEIM GMBH
- Filing Date
- 2025-11-28
- Publication Date
- 2026-07-30
Smart Images
Figure EP2025084626_30072026_PF_FP_ABST
Abstract
Description
[0001] Tool slide adjustment device and method for tool slide adjustment The present invention relates to a tool slide adjustment device and a method for tool slide adjustment.
[0002] EP 3222375 Al shows a drilling tool with a slide 5 mounted transversely to an axis of rotation, wherein a motor is connected to and controllable with the slide in order to move the slide transversely to the axis of rotation and thus change the distance of a cutting edge to the axis of rotation.
[0003] In the case of the drilling tool known from EP 3 222375 Al, there is a need for the slide to adjust itself unintentionally in a position once reached, i.e. without the motor being operated or an external force being exerted on the slide.
[0004] This unintentional adjustment of the slide is usually very small, in the range of a few micrometers. Despite its small size, this adjustment can have a significant impact on the precision of the bores. Particularly when manufacturing bores with very tight tolerances and high accuracy requirements, this self-adjusting slide can be problematic. It results in the bore diameters not achieving the desired precision, which impairs the quality and functionality of the manufactured parts.
[0005] The object of the present invention is to provide a high-precision tool slide adjustment device and a high-precision method for tool slide adjustment.
[0006] The object of the present invention is solved by the subject matter of claims 1 and 11. Advantageous embodiments of the invention can be found in the dependent claims, which are freely combinable with one another.
[0007] According to the present invention, the tool slide adjustment device comprises a base body rotatable with respect to a rotary axis, a tool slide adjustable transversely with respect to the rotary axis and self-locking mounted on the base body, a drive train for adjustable drive of the tool slide and a control unit for controlling the drive train, wherein the control unit is designed such that in an activated state it controls the drive train so that the drive train adjusts the tool slide until the tool slide has reached a predetermined target position, and that the control unit then controls the drive train in the activated state in reverse for the duration of a stored reaction time of the tool slide or a portion of the reaction time.
[0008] By controlling the drive train in reverse in the activated state for the duration of the stored reaction time of the tool slide or the portion of the reaction time, the control unit will
[0009] The drive train is mechanically relaxed. This reduces the mechanical stress on the drive train. When initially adjusted to the predetermined target position, the drive train typically twists. This built-up stress usually dissipates, sometimes even abruptly, when the tool slide adjustment device is handled. As a result, the self-locking mechanism of the tool slide is overcome, albeit slightly, but still in a problematic manner for high-precision applications.Similarly, thermal stresses or thermal expansion of the drive train are also problematic if the tool slide adjustment device is mounted in a cold environment and the tool slide is adjusted to the predetermined target position in this environment, and then the temperature rises, whereupon the drive train overcomes the self-locking mechanism and again moves the tool slide at least slightly out of the predetermined target position.
[0010] In the context of this disclosure, “adjustable transversely to the axis of rotation” and the like usually means “perpendicular to the axis of rotation”, but preferably “exclusively perpendicular to the axis of rotation”. In the context of this disclosure, “reverse control” and the like means that the drive train is controlled by the control unit in such a way that, upon exceeding the reaction time, the tool slide would be adjusted in the direction opposite to the direction in which the tool slide was adjusted when the reaction time was first reached, i.e., before the inventive relaxation of the drive train had taken place.In the case of a rotary drive train, this would then be, for example, a right-hand rotation if the tool slide was moved into the predetermined target position by a control with the control unit under a left-hand rotation of the drive train before the relaxation of the drive train according to the invention had taken place.
[0011] The reaction time is the time required from the activation of the drive train, for example, the starting of a drive unit within the drive train, until the tool slide is set in motion by the drive train. This time includes overcoming the self-locking of the tool slide.
[0012] The tool slide adjustment device is moved by an adjustment device in which the tool slide is held in position by a counter-tension that counteracts the mechanical tension of the drive train, by bringing the drive train into a tension-reduced state in the tool slide adjustment device according to the invention by means of a time-controlled drive of the drive train based on the stored reaction time or a portion thereof, whereby additional components of the drive train to counteract the mechanical tension, such as a
[0013] A public additional drive unit and / or a wedge mechanism are not required and therefore no longer need to be or are part of the drive train.
[0014] The tool slide adjustment device is typically designed as a drill head for boring an internal bore. The tool slide usually has at least one reversibly detachable cutting element. The drive train typically has an eccentric adjustment mechanism for adjusting the tool slide. When the tool slide is adjusted transversely to the axis of rotation, it is usually moved such that a diameter with respect to the axis of rotation can be assigned to the tool slide.
[0015] According to a training program, the control unit is designed to record the reaction time. Following this training, the control unit is inherently equipped to record the reaction time. This means that the control unit typically includes and / or interacts with measuring instruments and algorithms, and sometimes even incorporates them itself. The control unit's ability to record the reaction time allows it to react situationally to various stress states in the drive train and reduce them by recording the relevant reaction time of the tool slide.
[0016] According to a further development, the tool slide adjustment device includes a timing device for recording the reaction time of the tool slide and a position measuring device for measuring the position of the tool slide. The timing device and the position measuring device provide the data required to record the reaction time by...
[0017] 20 Position measuring device detects the adjustment of the cross slide and thus also a standstill of the tool slide relative to the base body, and the time measuring device coupled with the position measuring device detects the movement time and thus also the standstill time of the tool slide.
[0018] According to a further development, the control unit, in the activated state, controls the drive train in such a way that the tool slide is set into a first adjustment movement and thus reaches the predetermined target position, and that the tool slide is then set into a second adjustment movement opposite to the first adjustment movement and thus is moved to a position different from the predetermined target position, wherein the control unit is designed and arranged such that the reaction time of the tool slide for initiating the second adjustment movement is measured and this reaction time or a portion thereof is stored on a storage medium connected to the control unit for a predetermined duration, by coupling the timing device with the position measuring device in such a way that the measurement of the reaction time begins with the control with respect to the second adjustment movement, and by the
[0019] Public measurement of the reaction time is stopped from the initiation of the second adjustment movement, wherein the control unit is further designed and arranged such that the tool slide is moved into the first adjustment movement and thus reaches the predetermined target position again, whereby after reaching the predetermined target position again, the tool slide is driven in the direction opposite to the direction of the first adjustment movement for the duration of the stored reaction time or a portion thereof. According to this further development, the control unit, in the activated state, controls the drive train such that the tool slide is moved into the first adjustment movement in order to reach the predetermined target position.After reaching the predetermined target position, the tool slide is moved by the drive train, controlled by the control unit, in the opposite direction to the first adjustment movement, thus moving it to the other position. The timing device is coupled with the position measuring device, so that the measurement of the reaction time begins when the drive train is activated for the second adjustment movement and stops when the second adjustment movement is initiated. The control unit moves the tool slide by means of the...
[0020] 15. The drive train is again moved into the first adjustment movement to reach the predefined target position. After reaching the predefined target position again, the tool slide is moved in the opposite direction to the first adjustment movement for the duration of the stored reaction time or a portion thereof. The drive train is mechanically relaxed by the second adjustment movement.
[0021] 20. According to further training, the control unit is configured and configured to perform a plausibility check. In a test state, the control unit verifies whether the measured response time of the tool slide complies with a stored maximum time. The plausibility check serves to verify the correctness and reliability of the measured response time of the tool slide. The control unit typically switches to a special test state. In this state, it performs the necessary checks to ensure that the measured response time complies with the stored maximum time. This maximum time represents an upper limit that should not be exceeded to ensure the relaxation of the drive train. If the measured response time complies with the stored maximum time, the response time is considered plausible.Otherwise, an error or deviation will be detected, which could indicate potential problems. The plausibility check is important to ensure that the tool slide adjustment device operates correctly and efficiently by detecting early any deviations in the response time that could otherwise lead to an adjustment from the specified target position when the tool slide is reverse-controlled.
[0022] According to a training course, the proportion of reaction time is between 50% and 90% of the total reaction time. This training course states that a specific portion of the stored reaction time is used. This portion lies between 50% and 90% of the total reaction time. This means that only a part of the total reaction time is used for the reverse control of the drivetrain. If 100% of the reaction time were used, however, there would be the possibility, due to potential measurement inaccuracies, that the drivetrain would be reversed too far, with the consequence that mechanical stress could build up again in the drivetrain.
[0023] According to further training, the reaction time accounts for 60% to 80% of the total reaction time. This further reduces the probability of the tool slide being reset too far.
[0024] According to further training, the drive train features an eccentric mechanism. The eccentric mechanism is a special type of mechanism that converts the rotary motion of the drive train into a linear motion of the tool slide perpendicular to the axis of rotation. The eccentric mechanism enables precise control of the tool slide's movement perpendicular to the axis of rotation and is typically robust and durable.
[0025] According to a further development, the tool slide has at least one reversibly detachable cutting element, which is arranged below the predetermined target position for cutting on a cutting circle, the cutting circle having a diameter ranging from 2 mm to 500 mm. According to this further development, the at least one cutting element can be easily mounted and dismounted, which facilitates replacement and maintenance. The cutting circle describes the circular path that the cutting element traces during a rotation of the adjustment device with respect to the axis of rotation. The diameter of the cutting circle on which the cutting element is arranged can vary from 2 mm to 500 mm. This means that the cutting element is capable of performing cuts of a wide range of sizes, depending on the specific requirements of the application.According to further training, the drive train is designed and arranged in such a way that the reaction time is in the range of 100 ms to 1000 ms. The reaction time is therefore correspondingly short, allowing the tool slide to be adjusted quickly and precisely.
[0026] According to the present invention, the method for adjusting the tool slide comprises the steps: a) adjusting a self-locking tool slide by actuating a 30 drive train until the tool slide has reached a predetermined target position; b) at least partially mechanically releasing the drive train while maintaining the predetermined target position of the tool slide for the duration of a reaction time of the tool slide or a portion thereof, by releasing the drive train with respect to its actuation in step a).
[0027] The tool slide is controlled in reverse. This method enables precise and stable positioning of the tool slide by reducing the mechanical stress in the drive train after the predetermined target position has been reached. In step a), the drive train is activated to adjust the tool slide, usually perpendicular to a rotary axis. This is done by targeted control commands that the control unit sends to the drive train, for example, to one that typically drives a shaft via a reduction gear, which in turn drives an eccentric mechanism that adjusts the tool slide. The tool slide is adjusted until it reaches the predetermined target position. In step b), the mechanical relaxation of the drive train takes place. This means that the stress or load in the drive train is reduced to ensure the stability and precision of the positioning.During this relaxation phase, the tool slide remains in the predetermined target position. This is important to ensure that the slide's position is not altered while the drive train is being relaxed. The drive train is relaxed for the duration of the tool slide's response time, or a portion thereof. To achieve drive train relaxation, the drive train is controlled in reverse. This means that the control commands originally used to move the tool slide to its predetermined target position are applied in reverse to reduce the tension in the drive train.
[0028] According to further training, the procedure includes the additional step c): recording and storing the 20-second reaction time in a step preceding step b). Integrating the additional step c) ensures that the tool slide's reaction time is accurately recorded and stored before the subsequent steps of the procedure are performed. The stored reaction time is used in the following steps to determine the duration of the mechanical relaxation of the drive train. This ensures that the relaxation is performed precisely and consistently.
[0029] According to a further development, in step c), the tool slide is moved by the drive train into a first adjustment movement until it reaches the predetermined target position. Then, the drive train moves the tool slide into a second adjustment movement opposite to the first, until it reaches a position different from the predetermined target position. The reaction time for initiating the second adjustment movement is measured, and this reaction time, or a portion thereof, is stored. This stored reaction time, or a portion thereof, is then used in step b). According to this further development of the method, the tool slide is moved to the predetermined target position by the first adjustment movement, with the drive train during this process...
[0030] The winding of a clock spring is usually done mechanically. The second adjustment movement moves the tool slide from the predetermined target position to a different position. This second adjustment is used to measure the reaction time, and this time, or a portion thereof, is stored. The stored reaction time, or a portion thereof, is used in step b) to reverse the drive train for this duration, thus mechanically relaxing the drive train. According to a further development, in step c) and / or step b), it is checked whether the stored reaction time is less than or equal to a predetermined maximum time. This verifies the plausibility of the recorded reaction time.
[0031] According to a further development, the process includes the additional step d): cutting a workpiece surface with a cutting element that is reversibly and detachably attached to the tool slide. In this additional step d), the tool slide adjustment device is used to cut the workpiece surface.
[0032] Further advantages and expediencies of the invention will become apparent from the following description of an exemplary embodiment with reference to the accompanying figures.
[0033] The figures show
[0034] Fig. 1: a tool slide adjustment device in a perspective view from the front;
[0035] Fig. 2: a longitudinal section showing a front area of the
[0036] 20 Tool slide adjustment device;
[0037] Fig. 3: in a longitudinal section view according to the section line 11-11 from Fig. 2, a detail from Fig. 2;
[0038] Fig. 4: in a perspective view from behind, the front area of the tool slide adjustment device;
[0039] Fig. 5a: a schematic representation of a tool slide;
[0040] Fig. 5b: in a schematic representation the tool slide according to Fig. 5a in left-side contact engagement with an eccentric pin;
[0041] Fig. 5c: in a schematic representation the tool slide according to Fig. 5a in right-hand contact engagement with the eccentric pin;
[0042] 30 Fig. 5d: in a schematic representation the tool slide according to Fig. 5a in the contact-free state with respect to the eccentric pin;
[0043] Fig. 6: a schematic representation of the tool slide according to Fig. 5a and a schematically represented positioning coordinate system;
[0044] PublicFig. 7: in the form of a block diagram, an algorithm that is stored on a storage medium of the control unit of the tool slide adjustment device.
[0045] Fig. 1 shows a tool slide adjustment device 1. The tool slide adjustment device 1 comprises a base body 3 rotatable with respect to a rotary axis 2 and a tool slide 4 mounted on the base body 3 so as to be vertically adjustable with respect to the rotary axis 2 and self-locking; the tool slide is adjustable in the directions of the double arrow 2a perpendicular to the rotary axis 2. Fig. 2 shows a longitudinal section parallel and central to the rotary axis 2 through a front part of the tool slide adjustment device 1 in the plane in which the movement of the tool slide 4 takes place. Fig. 2 shows that the tool slide adjustment device 1 includes a drive train 5 for the adjustable drive of the tool slide 4. The drive train 5 comprises: an electric motor 6, a reduction gearbox 7 with a gear shaft 8, and an eccentric shaft 9 with an eccentric pin 10.A pinion 11 of the electric motor 6 engages with a gear wheel 12 of the reduction gear 7, so that the gear shaft 8 is rotated centrally 15 with respect to the axis of rotation 2 by a rotation of the pinion 11, at a lower speed than the pinion 11, for example, by a factor of 1000. The gear shaft 8 driven in this way is non-rotatably connected to the eccentric shaft 9, so that the electric motor 7 drives the eccentric shaft 8. The eccentric shaft 8 is rotatably mounted on the base body 3 by a rolling ball bearing 12 relative to the base body 3. The eccentric pin 10 is eccentric with respect to the...
[0046] The eccentric shaft 8 is formed by a pivot axis 2 such that the eccentric pin 10 orbits around the pivot axis 2 when the eccentric shaft 8, and thus the transmission shaft 8, rotates. In the position of the tool slide 4 shown in Fig. 2, the tool slide 4 is located midway between the possible end positions shown above and below in Fig. 2, so that the eccentric shaft 8 is aligned with the pivot axis 2 in this zero position. The eccentric pin 10 is rotatably mounted in a T-nut 14 by means of a needle bearing 13. The T-nut 14 is slidably mounted relative to the tool slide 4 in a recess 15 extending longitudinally perpendicular to the plane of Fig. 2. The T-nut 14 slides in the recess 15 depending on the direction and angle of rotation relative to Fig. 2.2 upwards or downwards, whereby the tool slide 4 is adjusted accordingly upwards or downwards, i.e., in one of the 30 directions of the double arrow 2a, while the T-nut 14 simultaneously slides perpendicularly to and out of the plane of Fig. 2, or perpendicularly to and into it. The T-nut 14 performs this movement due to the eccentricity between the central longitudinal axis 16 of the eccentric pin 10 and the axis of rotation 2, shown in detail in Fig. 3, so that the drive train 5 thus has an eccentric mechanism.
[0047] PublicFig. 3 shows, in a perspective view from the rear, the front area of the base body 3 in its disassembled state relative to the rest of the base body 3. Fig. 3 clearly shows that the tool slide adjustment device 1 also includes a control unit 17, which, by way of example, comprises a circuit board 18 equipped with a microprocessor 19 and a
[0048] The control unit 17 is equipped with 5 electronic memory 20. The control unit 17 is designed, i.e., programmed and controllable on the basis of control commands, such that in an activated state, the control unit 17 first controls the electric motor 6 through its motor control unit 21, which comprises a circuit board 22 equipped analogously to the control unit 17, in such a way that the electric motor 6 drives the drive train 5, i.e., rotates the pinion 11 as described with regard to Fig. 2 and Fig. 3, so that the tool slide 4 is moved into a predetermined target position perpendicular to the axis of rotation 2.
[0049] This is usually accomplished by an operator entering a control command regarding the control unit 18 in the form of a so-called "prompt" at a user interface, so that the tool slide 4 is moved, for example, 200 pm from its zero position shown in Fig. 2 upwards or downwards (left or right depending on the viewing direction). Upon reaching the predetermined target position in this way, the drive train 5 typically twists, usually particularly in the area of the gear shaft 8, and / or the eccentric pin 10 typically bends with respect to the axis of rotation 2, so that the drive train 5 is in a mechanically pre-tensioned state after the tool slide 4 has reached the predetermined target position. The control unit 17 is designed such that in a further activated state, which is activated automatically, for example, it controls the drive train 5 in such a way thatthat the control unit 17 reverses the direction of the drive train 5 for the duration of a portion of the reaction time of the tool slide 4 stored in the memory 20 with respect to reaching the predetermined target position. That is, if the gear shaft 7 was initially rotated clockwise to reach the predetermined target position, it is then rotated counterclockwise for the duration of the stored portion of the reaction time of the tool slide 4 based on a corresponding control command. This mechanically relaxes the drive train 5 accordingly, meaning that the gear shaft 7 is at least less twisted and the eccentric pin is at least less bent, and thus subjected to lower lateral reaction forces applied by the tool slide 4. The tool slide 4 remains stationary because its reaction time does not exceed 30.in the specified target position. The described twisting of the drive train 5 and the described bending in the area of the eccentric pin 10 are usually minimal, i.e., not usually visually perceptible, but nevertheless problematic for consistently precise maintenance of the tool slide 4 in the specified target position, so that the mechanical relaxation of the drive train 5 effected by the control unit 17 by actuating the drive train 5,
[0050] Public drive train 5 is important, especially when pm tolerances regarding the position of the tool slide 4 must be met.
[0051] Since the tool slide 4 is self-locking, it only moves out of the predetermined target position when a contact with the base body 3 is established.
[0052] The self-locking force is overcome by the eccentric pin 10 overcoming the self-locking force through its eccentric adjustment relative to the axis of rotation 2. Actuating the drive train 5 for the duration of the stored portion, for example 60% or 180 ms, of the reaction time of the tool slide 4, for example 300 ms, ensures that the tool slide 4 is not moved out of the predetermined target position when the control unit 17 reverses the actuation to mechanically release the drive train 5. If the reaction time of the tool slide 4 is exceeded, i.e., if the gear shaft 5 is controlled for a longer period than the reaction time of the tool slide 4 of, for example, 300 ms, for example, for a duration of 500 ms, the gear shaft 5 would be rotated for so long and thus the eccentric pin 10 would be adjusted eccentrically to such an extent that the tool slide 4 would leave the specified target position 15.
[0053] The tool slide adjustment device 1 is designed to detect the reaction time of the tool slide 4. For this purpose, the tool slide adjustment device 1 has a position measuring device 23, shown in Fig. 2, within the base body 3. The position measuring device 23 operates according to a magnetic principle and comprises a first measuring element 24 and a [missing element] attached to the
[0054] 20 Tool slide 4 has a second measuring element 25 formed in the form of a projection, which is moved in the directions of the double arrow 2a relative to the first measuring element 24 when the tool slide 4 is moved perpendicular to the axis of rotation 2. This relative movement between the first measuring element 24 and the second measuring element 25 causes a static magnetic field to move relative to the first measuring element 24. This movement is detected by the first measuring element 24, allowing the position of the tool slide 4 to be determined and transmitted to the control unit 17. The circuit board 18 includes a timer 26 as part of the control unit 17. This timer is electronically coupled to the position measuring device 23, so that the timer 26 records both the time the tool slide 4 is stationary and the time it is moving.
[0055] The control unit 17 detects the reaction time of the tool slide 4 by controlling the drive train 5 in the activated state such that the tool slide 4 is set into a first adjustment movement by the drive train 5 and thus reaches the predefined target position from any actual position, which can also be the zero position. The tool slide 4 is then, as a second step, i.e., after the tool slide 4 has reached the predefined target position, moved by the drive train 5 controlled by the control unit 17 into a
[0056] The second adjustment movement is the opposite of the first; that is, if the first adjustment movement was directed upwards relative to Fig. 2, the second adjustment movement is then directed downwards relative to Fig. 2. The tool slide 4 is moved by the second adjustment movement to a position other than the predetermined target position. The control unit is such that
[0057] 5 is configured, i.e., programmed and arranged, i.e., arranged to communicate with the control unit 21, such that the reaction time of the tool slide 4 for initiating the second adjustment movement is measured by the timer 26. The timer 26, due to its coupling with the position measuring device 23, records the time elapsed from the switching on of the electric motor 6 until the start of the movement of the tool slide 4 from the predetermined target position. This is the reaction time of the tool slide 4. A portion of the reaction time, for example 60%, of the tool slide 4 is then stored in the memory 20 for a predetermined duration.
[0058] The control unit 17 is furthermore designed, i.e., programmed and arranged, i.e., connected to the control unit 21 in such a way that the tool slide 4 is moved back into the first adjustment movement by a control of the drive train 5 and thus the
[0059] Once the predetermined target position is reached, the control unit 17 then controls the drive train 5 in the second direction opposite to the first adjustment movement, i.e., in the direction of the second adjustment movement, for the duration of the stored reaction time of the tool slide 4. This mechanically relaxes the drive train 5 while maintaining the predetermined target position.
[0060] 20 The control unit 17 is further designed, i.e., programmed and arranged, to check in a test state after the described acquisition of the reaction time of the tool slide 4 whether the measured reaction time of the tool slide 4 complies with a maximum stored time, thereby arranging and designing the control unit 17 to perform a plausibility check. Should the measured reaction time of the tool slide 4 have been measured as being longer than it actually is due to a defect in the timer 26, the tool slide 4 would leave the predetermined target position for the duration of the portion of the reaction time of the tool slide 4 when the drive train 5 is reversed by the control unit 17. By performing the described plausibility check, the control unit 17 avoids such an override of the drive train 5 due to an error in the acquisition of the reaction time of the tool slide 4.
[0061] Figures 5a to 5d show, in a rough schematic representation, a tool slide 27 analogous to the tool slide 4, and Figures 5b to 5d additionally show, in a rough schematic representation, an eccentric shaft 28 analogous to the eccentric shaft 9 with an eccentric pin 29 which, within a recess 29a analogous to the recess 15, extends laterally with respect to Figures 5b to 5d.
[0062] Public (right / left) Adjustment of the tool slide 27 is based on an eccentric mechanism analogous to the one described with respect to Figs. 1 and 4. The tool slide 27 is reversibly detachable from a cutting element 30, which is arranged for cutting on a cutting circle 31 schematically indicated in Fig. 5a. The cutting circle 31 is centered with respect to a rotation axis 32 analogous to the 5 axes of rotation 2, and its cutting circle diameter 33 is defined by the position of the tool slide 27. The cutting circle 31 is shown in a view parallel to the axis of rotation 32, while the tool slide 27 is shown in a view perpendicular to the axis of rotation 32. The cutting circle diameter 33 is, for example, 100 mm, which lies in the range of 2 mm to 500 mm.
[0063] Figures 5a to 5d and 6 illustrate, with a constant predetermined target position of the tool slide 27 and in an exaggerated manner, that the eccentric pin 29, according to Figure 5b, initially contacts the tool slide 27 laterally upon reaching the predetermined target position and is thus clamped by the reaction force F, and according to Figure 5c, with a reversed drive of the eccentric pin 29, which just barely corresponds to the duration of the reaction time of the tool slide 4.
[0064] If the eccentric pin 29, and thus the eccentric shaft 28, is driven in reverse for the duration of the reaction time of the tool slide 27, or for a portion thereof, with respect to the drive of the eccentric shaft 28 to reach the predetermined target position, starting from the clamped state according to Fig. 5b (which can also be referred to as the initial attainment of the predetermined target position), the eccentric pin 29 is moved, for example, to the position shown in Fig. 5d, in which the reaction force F is effectively zero. Figs. 5a to 5d are intended only to illustrate by way of example how mechanical stresses are relieved in the sense of the present disclosure.
[0065] Fig. 6 shows by way of example that the tool slide 27 can be moved to the right or left, by
[0066]
[0067] and marked “+”, can be adjusted, i.e. perpendicular to the axis of rotation 32 shown in Fig. 5a. The positioning coordinate system in Fig. 6 below the representation of the tool slide 27 shows by way of example that the tool slide 27 can be adjusted by 250 pm to the left and 250 pm to the right and can be moved from any actual position to a target position within this range.
[0068] Figure 7 shows an example of an algorithm with which the control unit 17 is programmed. Thus, an adjustment of the tool slide 4 begins with the control unit 17 receiving a new target position, which then becomes the predefined target position. The drive train 5 is then controlled by the control unit 17 based on the algorithm until the tool slide 4 has been moved to the predefined target position. The algorithm confirms this by querying "Target position reached".
[0069] Publicly reviewed. If this query is answered with "Yes" on the part of control unit 17, it reverses the direction of drive train 5, i.e., drive train 5 initiates a reversal of the tool slide's direction and timer 26 is started to determine the reaction time of tool slide 4. The algorithm then checks whether the
[0070] 5 Position measuring system 23 detects a change in the position of the tool slide 4 in the opposite direction (opposite direction to the direction in which the tool slide 4 was moved to reach the specified target position). If the control unit 17 answers "Yes" to this, the movement of the tool slide 4 is stopped by the control unit 17 stopping the drive train 5 with a corresponding stop command. A portion of the reaction time of the tool slide 4 determined in this way is stored in the control unit 17. The control unit 17 then controls the drive train based on the algorithm so that the tool slide 4 is moved back to the specified target position. The algorithm checks this by querying "Target position reached". If this query is answered "Yes" by the control unit 17, the control unit 17 stops the drive train 5. Thereupon, the
[0071] 15 Control unit 17 reverses the drive train for the duration of the reaction time in the opposite direction (opposite to the direction in which the tool slide 4 was adjusted to regain the predetermined target position). This relaxes the drive train 5 and allows the tool slide adjustment 1 to be used as intended with the tool slide 4 now precisely adjusted and better maintaining the predetermined target position, in particular for boring a bore, according to the design of the tool slide adjustment device 1 shown in Figs. 1 20 to 4.
[0072] Figures 1 to 4, together with Figure 7, disclose a method for tool slide adjustment, comprising the steps: a) adjusting the self-locking tool slide 4 by actuating the drive train 5 until the tool slide 4 has reached the predetermined target position; b) at least partially mechanically releasing the drive train 5 while maintaining the predetermined target position of the tool slide 4, by having the control unit 17 execute the algorithm shown in Figure 7, wherein the reaction time of the tool slide 4 is recorded and stored before the drive train 5 is released, and the described plausibility check regarding the reaction time is performed, i.e., whether it is less than or equal to a predetermined maximum time 30 or exceeds it, after which the algorithm according to Figure 7 is then terminated and a corresponding error message is generated.In a further step, the tool slide adjustment device 1 is used to cut a workpiece surface with a cutting element 30 which is reversibly detachable from the tool slide 4.
[0073] Figures 1 to 4 represent a tool slide adjustment device 1 in which the control unit 17 is programmed on the basis of the algorithm shown in Figure 7 such that, after the predetermined target position of the tool slide 4 has been reached for the first time, it controls the drive train 5 in this respect for the duration of a portion of the reaction time of the tool slide 4, whereby the drive train 5 is mechanically relaxed and the tool slide 4 maintains the predetermined target position.The person skilled in the art understands that the specific form and design of the tool slide adjustment device 1, in particular of the base body 3, the tool slide 4 and the drive train 5, is indeed advantageous, but the relaxation of the drive train 5 achievable by the control unit 17 also works with other base bodies, tool slides, drive trains and 10 other control units, which can be used in particular for machining processes other than boring a bore, in which the tool slide is still self-locking mounted on a base body and in which the control unit is programmed according to the algorithm shown in Fig. 7.
[0074] The control unit 17, as shown in Fig. 7, in conjunction with the timer 5 and the position measuring device 13, which can also be considered part of the control unit 17, is further programmed to detect the reaction time of the tool slide 4 by moving the tool slide 4 from the first reached predetermined target position, as the external specification of the target position, to another position by means of a correspondingly reversed control of the drive train 5 and thereby stopping the time that elapses until the tool slide 4 20 moves.
[0075] Public
Claims
REQUIREMENTS 1. Tool slide adjustment device (1), comprising a base body (3) rotatable with respect to a rotary axis (2a, 32), a tool slide (4, 27) mounted on the base body (3) so as to be laterally adjustable with respect to the rotary axis (2a, 32) and self-locking, a drive train (5) for adjustable drive of the tool slide (4, 27) and a control unit (17) for controlling the drive train (5), wherein the control unit (17) is designed such that in an activated state it controls the drive train (5) so that the drive train (5) adjusts the tool slide (4, 27) until the tool slide (4, 27) has reached a predetermined target position, and that the control unit (17) then controls the drive train (5) in the opposite direction for the duration of a stored reaction time of the tool slide (4, 27) or a portion of this reaction time.
2. Tool slide adjustment device (1) according to claim 1, wherein the control unit (17) is designed to detect the reaction time.
3. Tool slide adjustment device (1) according to claim 2, wherein the tool slide adjustment device (1) comprises a timing device (26) for recording the reaction time of the tool slide (4, 27) and a position measuring device (23) for measuring a position of the tool slide (4, 27).
4. Tool slide adjustment device (1) according to claim 3, wherein the control unit (17) controls the drive train (5) in the activated state such that the tool slide (4, 27) is moved into a first adjustment movement and thus reaches the predetermined target position, and that the tool slide (4, 27) is then moved into a second adjustment movement opposite to the first adjustment movement and thus is moved into a position different from the predetermined target position, wherein the control unit (17) is designed and arranged such that the reaction time of the tool slide (4, 27) for initiating the second adjustment movement is measured and this reaction time or a portion thereof is stored on a storage medium (20) connected to the control unit (17) for a predetermined duration by coupling the timing device (26) with the position measuring device (23) in such a way,that the measurement of the reaction time begins with the control of the second adjustment movement, and by stopping the measurement of the reaction time from the initiation of the second adjustment movement, wherein the control unit (17) is further designed and arranged such that the tool slide (4, 27) is moved into the first adjustment movement and thus reaches the predetermined target position again, wherein after reaching the predetermined target position again the tool slide (4, 27) is controlled in the direction opposite to the direction of the first adjustment movement for the duration of the stored reaction time or a portion thereof.
5. Tool slide adjustment device (1) according to claim 4, wherein the control unit (17) is arranged and designed to perform a plausibility check, such that the control unit (17) checks in a test state whether the measured reaction time complies with a stored maximum time.
6. Tool slide adjustment device (1) according to one of the preceding claims, wherein the proportion of the reaction time is 50% to 90% of the reaction time.
7. Tool slide adjustment device (1) according to claim 6, wherein the proportion of the reaction time is 60% to 80% of the reaction time.
8. Tool slide adjustment device (1) according to one of the preceding claims, wherein the drive train (5) has an eccentric mechanism.
9. Tool slide adjustment device (1) according to one of the preceding claims, wherein the tool slide (4, 27) has at least one reversibly detachable cutting element (30) which is arranged below the predetermined target position for cutting on a flight circle (31), wherein the flight circle (31) has a diameter (33) in the range of 2 mm to 500 mm.
10. Tool slide adjustment device (1) according to one of the preceding claims, wherein the drive train (5) is designed and arranged such that the reaction time is in the range of 100 ms to 1000 ms.
11. Method for tool slide adjustment, comprising the steps: a) Adjusting a self-locking tool slide (4, 27) by actuating a drive train (5) until the tool slide (4, 27) has reached a predetermined target position; b) at least partially mechanically relaxing the drive train (5) while maintaining the predetermined target position of the tool slide (4, 27) for the duration of a reaction time of the tool slide (4, 27) or a portion thereof, by reversing the control of the drive train (5) with respect to its control operation under step a).17 12. The method of claim 11, comprising the further step c): capturing and storing the reaction time in a step preceding step b).
13. Method according to claim 12, wherein in step c) the tool slide (4, 27) is moved by the drive train (5) into a first adjustment movement until the tool slide (4, 27) has reached the predetermined target position, wherein the tool slide (4, 27) is then moved by the drive train (5) into a second adjustment movement opposite to the first adjustment movement until the tool slide (4, 27) has reached a position different from the predetermined target position, wherein the reaction time for initiating the second adjustment movement is measured and this reaction time or a portion thereof is stored, wherein the reaction time thus stored or a portion thereof is used in step b).
14. Method according to claim 13, wherein in step c) and / or step b) it is checked whether the stored reaction time is less than or equal to a predetermined maximum time.
15. Method according to one of claims 11 to 14, comprising the further step d): cutting a workpiece surface with a cutting element (30) reversibly detachably attached to the tool slide (4, 27).