Displacement error compensation device of tool machining center

Abstract

The utility model relates to the technical field of numerical control machine tools, in particular to a displacement error compensation device of a cutter machining center. A displacement error compensation device of a cutter machining center comprises a top seat, a lead screw, a servo motor, a laser position sensor, an analog quantity acquisition module, a signal converter and a controller. According to the utility model, the lead screw required in the cutter machining process is improved, and the laser position sensor and the analog quantity acquisition module are additionally arranged at the tail end of the lead screw, so that the distance between the tail end of the lead screw and the supporting surface for containing the cutter is recorded and converted into analog quantity to be input into the controller, and error compensation is realized; therefore, the displacement distance change caused by expansion caused by heat and contraction caused by cold of the lead screw in the machining process is avoided, and the machining process of the cutter is more programmed and refined.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a displacement error compensation device for a tool machining center. Background Art

[0002] In the traditional process of machining tools through machine tools, the machine tool operates the three-axis screw to move the tool processing device above the tool to process the tool on the bearing surface. However, in actual application, the thermal expansion of the screw, the thermal deformation caused by machining and cutting and the ambient temperature difference affect the relative displacement between the processing device and the tool, causing machining errors and thus affecting the machining accuracy of the parts and the consistency of the precision of the processed products. Utility Model Content

[0003] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a displacement error compensation device for a tool machining center. By improving the screw rod required in the tool machining process, a laser position sensor and an analog quantity acquisition module are added to the end of the screw rod, so as to record the distance between the end of the screw rod and the supporting surface for holding the tool and convert it into an analog quantity and input it into a controller to achieve error compensation, thereby avoiding the displacement distance change caused by the thermal expansion and contraction of the screw rod during the machining process, and making the tool machining process more programmed and refined.

[0005] The utility model provides a displacement error compensation device for a tool processing center, comprising a top seat, a screw rod, a servo motor, a laser position sensor, an analog quantity acquisition module, a signal converter and a controller; the screw rod is longitudinally arranged on the top seat, the servo motor is arranged at one end of the screw rod, the laser position sensor is arranged at the other end of the screw rod, the laser position sensor is electrically connected to the input end of the analog quantity acquisition module, the output end of the analog quantity acquisition module is electrically connected to the input end of the signal converter, and the output end of the signal converter is connected to the controller. The top seat is used to fix the position of the screw and the servo motor so that they are located at a certain height. The laser position sensor set at the end of the screw is used to detect the distance between the end of the screw and the support surface that carries the tool. Due to thermal expansion and contraction during tool processing, when the temperature of the screw rises, thermal elongation deformation will occur. The originally preset processing distance is no longer applicable to the current scenario. Therefore, a laser position sensor is added to the end of the screw to measure the specific elongation of the screw through laser positioning reflection. Considering that the parameter variables obtained by the laser position sensor are different from the variable forms that the controller can receive, an analog acquisition module and a signal converter are added in the middle to match the communication between the two. After reading the elongation displacement, the controller can calculate the compensation value into the processing system through program calculation. Thereby, parameter deviation can be avoided in the subsequent processing process. Preferably, the screw rod can be a three-axis screw rod fixed on the machine tool, and the screw rod axis equipped with a laser position sensor is the Z axis. After adding the three-axis screw rod, all-round processing of the tool can be realized. At the same time, a pre-judgment program is set in the controller. If the deviation value is greater than the preset value, the machine tool pre-collision lock alarm will appear. Press the single-segment execution key, switch to the handwheel to move the Z axis to a safe position, press the reset key to release the alarm, and when the deviation value exceeds the set value, the machine tool will automatically lock the machine. At this time, it is necessary to unlock it in the password protection interface. When unlocking, the alarm information needs to be sent to the relevant personnel to obtain the password. After obtaining the password, entering the password will prompt that the password protection has been released, otherwise it will prompt that the password is wrong. After the alarm is lifted, press the relevant operation axis to move to a safe position.

[0006] In some embodiments, the end of the screw rod is also provided with a tool detection component, which includes a distance adjustment component and a detection component. The detection component is fixed to the end of the screw rod through the distance adjustment component, and the detection component inputs a detection signal to the controller. The tool detection component is used to detect the type of tool on the bearing surface. By detecting the type of tool, the moving length and processing variables of the screw rod can be better controlled. Preferably, the distance adjustment component is a distance adjustment bolt, and the distance between the detection component and the screw rod can be controlled by turning the bolt to adapt to the detection of different types of tools.

[0007] In some embodiments, the detection component is a light sensor, which includes a light emitter and a light receiver, and the light emitter and the light receiver are respectively arranged on both sides of the end of the screw and extend to the bottom of the screw. By correspondingly arranging multiple groups of light emitters and light receivers on both sides of the screw, the shape of the tool is determined according to the different distances at which the light is intercepted. Specifically, the solution of determining the shape of the object by using a light sensor is a prior art, and the specific structure and control program can refer to the prior art, which will not be elaborated here.

[0008] In some embodiments, a flipping device is also included, which is located below the screw rod. The flipping device includes a bearing seat, a rotating motor, a rotating center axis and a support plate. The rotating motor is arranged on the bearing seat, and the rotating center axis is arranged on the rotating shaft of the rotating motor. Several support plates are arranged at circumferential intervals around the rotating center axis, and the end of the screw rod corresponds to the position of the support plate. The set flipping assembly is used to carry the tool and serve as the processing surface of the tool. When the tool is placed on the supporting surface of the support plate, the three-axis screw controls the tool processing device to process the tool. After the processing is completed, the rotating motor is controlled to flip the support plate, and the processed tool falls onto the diversion base below. At the same time, the next support plate rotates under the screw to start the next round of tool processing. Preferably, the flipping device can be fixed on the machine table or placed on the diversion base below. The present technical solution only describes that the support plate is located between the screw and the diversion base. It should be understood that the function of the flipping device is to carry the tool for processing and flip the tool to guide it onto the diversion base below. The present technical solution only lists the main components of the device. The device also includes other components such as springs and bearings, which are not described in detail here. The specific structure can refer to the prior art.

[0009] In some embodiments, the flipping device further includes a first induction drive component, which is disposed on the bearing seat, one end of which is electrically connected to the rotating motor, and the other end of which is electrically connected to the controller. The first induction drive component is configured to receive a signal from the controller, and is powered on in time to perform the flipping step after the tool processing is completed, so as to achieve linkage processing with the lead screw.

[0010] In some embodiments, a shunt base is also included, which is located below the flip device. The shunt base includes a support base, a movable shunt slot and a second induction drive component. The movable shunt slot is arranged in the middle of the support base, and the second induction drive component is arranged at the bottom of the movable shunt slot. The movable shunt slot moves laterally under the control of the second induction drive component. The shunt base is used to carry the tool and guide different types of tools to different output lines. The shunt base has the function of lateral movement. The specific structure can refer to the prior art.

[0011] In some embodiments, a plurality of baffles are disposed on the movable diversion trough, and the baffles divide the movable diversion trough into a plurality of diversion channels.

[0012] In some embodiments, the movable diverter trough is tilted, which is more conducive to feeding the cutter into the classification assembly line of different cutters when the cutter falls.

[0013] In some embodiments, one end of the second inductive drive component is electrically connected to the mobile diverter slot, and the other end of the second inductive drive component is electrically connected to the controller, and the diverter channel corresponds to the position of the support plate. The second inductive drive component is used to receive a signal from the controller, and when the tool detection component detects the corresponding tool type, the signal is transmitted to the controller, and the controller then sends a signal to the second inductive drive component to control the mobile diverter slot to move the corresponding diverter channel to the bottom of the support plate to achieve the corresponding tool output.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model improves the screw rod required in the tool processing process, and adds a laser position sensor and an analog quantity acquisition module at the end of the screw rod, so as to record the distance between the end of the screw rod and the supporting surface for holding the tool and convert it into an analog quantity and input it into a controller to achieve error compensation, thereby avoiding the displacement distance change caused by the thermal expansion and contraction of the screw rod during the processing process, and making the tool processing process more programmed and refined.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0017] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0018] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the tool processing device in some embodiments of the utility model;

[0023] Figure 2 It is a connection diagram of the error compensation device in some embodiments of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the flipping device in some embodiments of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the diverter base in some embodiments of the utility model.

[0026] Description of main reference numerals:

[0027] 1. Top seat; 2. Screw rod; 3. Servo motor; 4. Laser position sensor; 5. Analog quantity acquisition module; 6. Signal converter; 7. Controller; 8. Tool detection component; 9. Flipping device; 10. Diverter base. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0029] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0032] Reference Figure 1 , Figure 1 It is a schematic diagram of the overall structure of the tool processing device in some embodiments of the utility model; Figure 2 It is a connection diagram of the error compensation device in some embodiments of the utility model.

[0033] According to some embodiments of the utility model, the utility model provides a displacement error compensation device for a tool machining center, comprising a top seat 1, a screw rod 2, a servo motor 3, a laser position sensor 4, an analog quantity acquisition module 5, a signal converter 6 and a controller 7; the screw rod 2 is longitudinally arranged on the top seat 1, the servo motor 3 is arranged at one end of the screw rod 2, the laser position sensor 4 is arranged at the other end of the screw rod 2, the laser position sensor 4 is electrically connected to the input end of the analog quantity acquisition module 5, the output end of the analog quantity acquisition module 5 is electrically connected to the input end of the signal converter 6, and the output end of the signal converter 6 is connected to the controller 7. The top seat 1 is used to fix the position of the screw rod 2 and the servo motor 3 so that they are located at a certain height. The laser position sensor 4 set at the end of the screw rod 2 is used to detect the distance between the end of the screw rod 2 and the support surface that carries the tool. Due to thermal expansion and contraction during tool processing, when the temperature of the screw rod 2 rises, thermal elongation deformation will occur. The original pre-set processing distance is no longer applicable to the current scenario. Therefore, a laser position sensor 4 is added to the end of the screw rod 2 to measure the specific elongation of the screw rod 2 through laser positioning reflection. In addition, considering that the parameter variables obtained by the laser position sensor 4 are different from the variable forms that the controller 7 can receive, an analog quantity acquisition module 5 and a signal converter 6 are added in the middle to match the communication between the two. After reading the elongation displacement, the controller 7 can calculate the compensation value into the processing through program calculation. In the system, parameter deviation can be avoided in the subsequent processing process. Preferably, the screw rod 2 can be a three-axis screw rod 2 fixed on the machine tool, and the screw rod 2 axis equipped with a laser position sensor 4 is the Z axis. After adding the three-axis screw rod 2, all-round processing of the tool can be achieved. At the same time, a pre-judgment program is set in the controller 7. If the deviation value is greater than the preset value, a machine tool pre-collision lock alarm will appear. Press the single-segment execution key, switch to the handwheel to move the Z axis to a safe position, press the reset key to release the alarm, and when the deviation value exceeds the set value, the machine tool will automatically lock the machine. At this time, it is necessary to unlock it in the password protection interface. When unlocking, the alarm information needs to be sent to the relevant personnel to obtain the password. After obtaining the password, entering the password will prompt that the password protection has been released, otherwise it will prompt that the password is wrong. After the alarm is lifted, press the relevant operation axis to move to a safe position.

[0034] The end of the screw rod 2 is also provided with a tool detection component 8, which includes a distance adjustment component and a detection component. The detection component is fixed to the end of the screw rod 2 through the distance adjustment component, and the detection component inputs a detection signal to the controller 7. The tool detection component 8 is used to detect the type of tool on the bearing surface. By detecting the type of tool, the moving length and processing variables of the screw rod 2 can be better controlled. Preferably, the distance adjustment component is a distance adjustment bolt, and the distance between the detection component and the screw rod 2 can be controlled by turning the bolt to adapt to the detection of different types of tools.

[0035] The detection component is a light sensor, which includes a light emitter and a light receiver, which are respectively arranged on both sides of the end of the screw rod 2 and extend to the bottom of the screw rod 2. By correspondingly arranging multiple groups of light emitters and light receivers on both sides of the screw rod 2, the shape of the tool is determined according to the different distances at which the light is intercepted. Specifically, the solution of determining the shape of the object by the light sensor is a prior art, and the specific structure and control program can refer to the prior art, which will not be elaborated here.

[0036] Reference Figure 3 , Figure 3 It is a schematic diagram of the structure of the flipping device in some embodiments of the utility model.

[0037] According to some embodiments of the utility model, optionally, the device also includes a flipping device 9, which is located below the screw rod 2. The flipping device 9 includes a bearing seat, a rotating motor, a rotating center axis and a support plate. The rotating motor is arranged on the bearing seat, and the rotating center axis is arranged on the rotating shaft of the rotating motor. Several support plates are arranged at circumferential intervals around the rotating center axis, and the end of the screw rod 2 corresponds to the position of the support plate. The set flipping assembly is used to carry the tool and serve as the processing surface of the tool. When the tool is placed on the supporting surface of the support plate, the three-axis screw 2 controls the tool processing device to process the tool. After the processing is completed, the rotating motor is controlled to flip the support plate, and the processed tool falls onto the diversion base 10 below. At the same time, the next support plate rotates to the bottom of the screw 2 to start the next round of tool processing. Preferably, the flipping device 9 can be fixed on the machine table or placed on the diversion base 10 below. The present technical scheme only describes that the support plate is located between the screw 2 and the diversion base 10. It should be understood that the function of the flipping device 9 is to carry the tool for processing and flip the tool to guide it onto the diversion base 10 below. The present technical scheme only lists the main components of the device. The device also includes other components such as springs and bearings, which are not described in detail here. The specific structure can refer to the prior art.

[0038] The flipping device 9 also includes a first induction drive component, which is arranged on the bearing seat, one end of the first induction drive component is electrically connected to the rotating motor, and the other end of the first induction drive component is electrically connected to the controller 7. The first induction drive component is used to receive a signal from the controller 7, and is powered on in time to perform the flipping step after the tool processing is completed, so as to realize the linkage and coordinated processing with the screw rod 2.

[0039] Reference Figure 4 , Figure 4 It is a schematic diagram of the structure of the diverter base in some embodiments of the utility model.

[0040] According to some embodiments of the utility model, the device may further include a diverter base 10, which is located below the flip device 9. The diverter base 10 includes a support base, a movable diverter slot, and a second induction drive component. The movable diverter slot is disposed in the middle of the support base, and the second induction drive component is disposed on the bottom of the movable diverter slot. The movable diverter slot moves laterally under the control of the second induction drive component. The diverter base 10 is used to carry tools and guide different types of tools to different output lines. The diverter base 10 has the function of moving laterally, and the specific structure can refer to the prior art.

[0041] A plurality of baffles are arranged on the movable diversion trough, and the baffles divide the movable diversion trough into a plurality of diversion channels.

[0042] The movable diverter trough is inclined, which is more conducive to feeding the cutter into the classification assembly line of different cutters when the cutter falls.

[0043] One end of the second inductive drive component is electrically connected to the mobile diverter slot, and the other end of the second inductive drive component is electrically connected to the controller 7. The diverter channel corresponds to the position of the support plate. The second inductive drive component is used to receive a signal from the controller 7. When the tool detection component 8 detects the corresponding tool type, the signal is transmitted to the controller 7. The controller 7 then sends a signal to the second inductive drive component to control the mobile diverter slot to move the corresponding diverter channel to the bottom of the support plate to achieve the corresponding tool output.

[0044] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0045] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the utility model. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0046] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the utility model. However, those skilled in the relevant art will understand that the utility model can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A displacement error compensation device for a tool machining center, characterized in that: It includes a top seat, a lead screw, a servo motor, a laser position sensor, an analog quantity acquisition module, a signal converter and a controller; The screw rod is longitudinally arranged on the top seat, the servo motor is arranged at one end of the screw rod, and the laser position sensor is arranged at the other end of the screw rod. The laser position sensor is electrically connected to the input end of the analog quantity acquisition module, the output end of the analog quantity acquisition module is electrically connected to the input end of the signal converter, and the output end of the signal converter is connected to the controller.

2. The displacement error compensation device for a tool machining center according to claim 1, characterized in that: The end of the screw rod is also provided with a tool detection component, which includes a distance adjustment component and a detection component. The detection component is fixed to the end of the screw rod through the distance adjustment component, and the detection component inputs a detection signal to the controller.

3. The displacement error compensation device for a tool machining center according to claim 2, characterized in that: The detection component is a light sensor, which includes a light emitter and a light receiver. The light emitter and the light receiver are respectively arranged on both sides of the end of the lead screw and extend to the bottom of the lead screw.

4. The displacement error compensation device for a tool machining center according to claim 1, characterized in that: It also includes a flipping device, which is located below the screw rod. The flipping device includes a bearing seat, a rotating motor, a rotating center axis and a support plate. The rotating motor is arranged on the bearing seat, the rotating center axis is arranged on the rotating shaft of the rotating motor, and several support plates are arranged at intervals on the periphery of the rotating center axis. The end of the screw rod corresponds to the position of the support plate.

5. The displacement error compensation device for a tool machining center according to claim 4, characterized in that: The flipping device also includes a first induction drive component, which is arranged on the bearing seat, one end of the first induction drive component is electrically connected to the rotating motor, and the other end of the first induction drive component is electrically connected to the controller.

6. The displacement error compensation device for a tool machining center according to claim 4, characterized in that: It also includes a diverter base, which is located below the flipping device. The diverter base includes a support base, a movable diverter slot and a second induction drive component. The movable diverter slot is arranged in the middle of the support base, and the second induction drive component is arranged on the bottom side of the movable diverter slot. The movable diverter slot moves laterally under the control of the second induction drive component.

7. The displacement error compensation device for a tool machining center according to claim 6, characterized in that: A plurality of baffles are arranged on the movable diversion trough, and the baffles divide the movable diversion trough into a plurality of diversion channels.

8. The displacement error compensation device for a tool machining center according to claim 6, characterized in that: The movable diversion trough is arranged inclined.

9. The displacement error compensation device for a tool machining center according to claim 7, characterized in that: One end of the second inductive driving component is electrically connected to the movable diverter slot, and the other end of the second inductive driving component is electrically connected to the controller. The diverter channel corresponds to the position of the support plate.

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