Tool changing control system and method and machine tool

Abstract

The invention provides a tool changing control system of a machine tool, the machine tool comprises a power source, a tool beating transmission mechanism, a main shaft box and a main shaft, the main shaft is arranged on the main shaft box, the power source is in driving connection with the main shaft box, and the tool beating transmission mechanism is used for controlling the main shaft to change tools; the tool changing control system comprises an acquisition module, a judgment module and an output module, and the acquisition module is connected with a power source and used for acquiring real-time output characteristics of the power source at a preset position of a main shaft in the process from the beginning of a tool changing action to the end of the tool changing action of the main shaft; the judging module is connected with the collecting module and used for judging the output characteristic range of the power source under the normal tool changing condition according to the real-time output characteristic of the power source. The invention further provides a machine tool and a tool changing control method of the machine tool. According to the tool changing control system of the machine tool provided by the technical scheme of the invention, the accuracy of tool changing judgment can be improved while the economical efficiency is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of processing equipment, and in particular to a tool changing control system, method and machine tool. Background Art

[0002] The machine tool is generally equipped with a tool magazine, and the tool to be replaced in the tool magazine is installed on the spindle through the tool changing arm, so that the spindle can process multiple projects through a variety of tools.

[0003] The current method for detecting whether a tool change in a tool magazine is successful is generally to observe with the operator's eyes to see whether the corresponding tool is installed in the correct position and whether it is held tightly, and then verify whether the tool change is successful through processing.

[0004] In addition, although some manufacturers install displacement sensors on the spindle box to detect the position of the spindle cutting ring, check whether the corresponding displacement meets the needs of the spindle to release the tool clamp, so as to determine whether the tool change is successful.

[0005] However, the detection results of the above method are directly related to the quality and accuracy of the sensor, and will increase the cost, so the economic efficiency is not high enough.

[0006] Therefore, how to improve the accuracy of tool change judgment while ensuring economy is an urgent problem to be solved. Summary of the invention

[0007] The present invention provides a tool changing control system, method and machine tool, which can improve the accuracy of tool changing judgment while ensuring economy.

[0008] On one hand, the present invention provides a tool changing control system for a machine tool, the machine tool comprising a power source, a tool-beating transmission mechanism, a spindle box and a spindle, the spindle being arranged on the spindle box, the power source being drivingly connected to the spindle box, the tool-beating transmission mechanism being used to control the tool changing of the spindle; the tool changing control system comprising:

[0009] A collection module connected to the power source, used to collect the real-time output characteristics of the power source when the spindle is at a predetermined position during the process from the start of the tool change action to the end of the tool change action;

[0010] A judgment module, connected to the acquisition module, for generating a tool change result signal indicating whether the tool change is successful according to the real-time output characteristics of the power source and the output characteristic range of the power source under normal tool change conditions;

[0011] An output module is connected to the judgment module and is used to output the tool change result signal.

[0012] In some feasible implementation schemes, the predetermined position of the spindle includes at least two positions of the spindle during the process of running downward from the highest point of the tool change stroke to the end of the tool change;

[0013] The power source is a motor, and the output characteristics of the power source include at least one or more of the output torque, output power, rotation speed, and load rate of the motor;

[0014] The output characteristic range of the power source includes the output characteristic range of the power source when the main shaft is at a predetermined position.

[0015] In some feasible embodiments, the predetermined position of the spindle includes a first preset position between the tool releasing position and the tool clamping position of the spindle when the spindle runs downward from the highest point of the tool changing stroke to the end of the tool changing, and a second preset position between the tool clamping position and the empty tool position of the spindle.

[0016] In some feasible implementation schemes, the predetermined position of the spindle also includes a third predetermined position between the idle tool position and the tool clamping position of the spindle when the spindle moves upward from entering the tool changing stroke to the highest point of the tool changing stroke, a fourth predetermined position between the tool clamping position and the tool releasing position of the spindle, and a fifth predetermined position before the spindle enters the tool changing stroke.

[0017] In some feasible implementation schemes, a control module and a data storage module are also included. The control module is connected to the output module and is used to generate an alarm signal according to the tool change result signal; the data storage module is connected to the judgment module and is used to store the output characteristic range of the power source under normal tool change conditions.

[0018] On the other hand, the present invention also provides a machine tool, including a base, a column, a power source, a knife-beating transmission mechanism, a spindle box, a spindle and a tool magazine, the column is arranged on the base, the power source is fixed on the column, the spindle box is slidable on the column, the spindle is arranged on the spindle box, the power source is connected to the spindle box driving, the tool magazine is fixed above the column, and also includes the above-mentioned tool changing control system, the knife-beating transmission mechanism includes a knife-beating block arranged on the column, a knife-beating arm connected to the spindle box and a knife-beating bearing arranged on the spindle, the knife-beating block, the knife-beating arm and the knife-beating bearing cooperate to control the spindle tool change.

[0019] In some feasible implementation schemes, a machine tool controller and a display module are also included. The machine tool controller is connected to the tool change control system and is used to receive the tool change result signal and control the continued processing, shutdown or alarm of the machine tool. The display module is connected to the machine tool controller and is used to display the tool change result signal or the alarm signal corresponding to the tool change result signal.

[0020] In addition, the present invention also provides a tool change control method for a machine tool, the machine tool comprising a power source, a tool-beating transmission mechanism, a spindle box and a spindle, the spindle is arranged on the spindle box, the power source is drivingly connected to the spindle box, the tool-beating transmission mechanism is used to control the tool change of the spindle; the tool change control method comprises:

[0021] Collecting the real-time output characteristics of the power source when the spindle is at a predetermined position during the process from the start of the tool change action to the end of the tool change action of the spindle;

[0022] Generate a tool change result signal indicating whether the tool change is successful according to the real-time output characteristics of the power source and the output characteristic range of the power source under normal tool change conditions;

[0023] Output the tool change result signal.

[0024] In some feasible implementation schemes, the output characteristic range of the power source under normal tool change conditions is also obtained, and the output characteristic range of the power source under normal tool change conditions is obtained, which specifically includes:

[0025] When the spindle enters tool change mode, install the test tool on the spindle;

[0026] When the test tool is installed on the spindle, a number of options are displayed through the display module; wherein the number of options at least include a tool change in place option and a tool change failure option for the user to select;

[0027] Receive information on tool change completion or tool change failure selected by the user;

[0028] When the information that the tool has been changed into place is received, the output characteristics of several groups of power sources are collected, and the output characteristic range of the power source is determined according to the output characteristics of the several groups of power sources.

[0029] In some feasible implementation schemes, when the spindle enters the tool change mode, a test tool is installed on the spindle, wherein the spindle includes a tool release position, a tool clamping position and an empty tool position moving downward, and the tool change control method further includes:

[0030] When the power source cooperates with the knife-beating transmission mechanism and the main shaft box moves downward, a first preset position is selected between the knife-releasing position and the knife-clamping position of the main shaft, and the real-time output characteristics of the power source are collected;

[0031] When the power source cooperates with the knife-beating transmission mechanism and the main shaft box moves downward, a second preset position is selected between the knife clamping position and the empty knife position of the main shaft, and the real-time output characteristics of the power source are collected;

[0032] The output characteristics of the power source when the spindle is at the first preset position and the second preset position under normal tool change conditions are saved multiple times, thereby obtaining the output characteristic range of the power source under normal tool change conditions.

[0033] The tool changing control system of the above-mentioned machine tool, the machine tool includes a power source, a tool-beating transmission mechanism, a spindle box and a spindle, the spindle is arranged on the spindle box, the power source is drivingly connected to the spindle box, and the tool-beating transmission mechanism is used to control the tool changing of the spindle; the acquisition module acquires the real-time output characteristics of the power source when the spindle is at a predetermined position during the process from the start of the tool changing action to the end of the tool changing action; then the judgment module generates a tool changing result signal indicating whether the tool changing is successful based on the real-time output characteristics of the power source and the output characteristic range of the power source under normal tool changing conditions, and finally the tool changing result signal is output through the output module, so that the tool changing result can be output based on the comparison of the real-time output characteristics of the power source and the output characteristic range of the power source without adding too many structural elements, thereby improving the accuracy of the tool changing judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work.

[0035] Figure 1 A partial schematic diagram of a machine tool provided in accordance with an embodiment of the present invention.

[0036] Figure 2 This is a structural block diagram of a tool changing control system provided in one embodiment of the present invention.

[0037] Figure 3 A schematic diagram of the position of a spindle of a machine tool provided in an embodiment of the present invention in a first preset position.

[0038] Figure 4 A schematic diagram of the position of a spindle of a machine tool provided in an embodiment of the present invention in a second preset position.

[0039] Figure 5 A sectional view of a spindle of a machine tool provided in accordance with an embodiment of the present invention.

[0040] Figure 6 The present invention is a flowchart of a tool changing control method provided by one embodiment of the present invention.

[0041] Component Symbols

[0042] 100, power source; 200, knife-beating transmission mechanism; 210, knife-beating bumper; 220, knife-beating arm; 230, knife-beating bearing; 300, spindle box; 400, spindle; 410, pull rod; 420, disc spring; 430, pull claw; 600, judgment module; 500, acquisition module; 700, output module; 800, control module; 900, data storage module; 1000, column; 1100, tool magazine.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, 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 connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In order to make the content of the present invention more clearly and more accurately understood, it will now be described in detail with reference to the accompanying drawings. The accompanying drawings in the specification illustrate examples of embodiments of the present invention, wherein the same reference numerals represent the same elements. It is understood that the scales shown in the accompanying drawings in the specification are not the scales of the actual implementation of the present invention, and are only for the purpose of illustrative description, and are not drawn according to the original size.

[0048] Please see Figure 1 The present invention provides a machine tool, including a base, a column 1000, a power source 100, a knife transmission mechanism 200, a spindle box 300, a spindle 400 and a tool magazine 1100, wherein the column 1000 is arranged on the base, the power source 100 is fixed on the column 1000, the spindle box 300 is slidable on the column 1000, the spindle 400 is arranged on the spindle box 300, the power source 100 is drivingly connected to the spindle box 300, and the tool magazine 1100 is fixed above the column 1000.

[0049] At present, the method of detecting whether the tool change in the tool magazine is successful is generally to observe with the operator's eyes to check whether the corresponding tool is installed in the correct position and whether it is firmly grasped, and then verify whether the tool change is successful through processing. In addition, although some manufacturers install displacement sensors on the spindle box to detect the position of the spindle cutter ring and check whether the corresponding displacement meets the requirements of the spindle to release the tool, so as to determine whether the tool change is successful. However, the detection results of the above method are directly related to the quality and accuracy of the sensor, and will increase costs, and the economic efficiency is not high enough.

[0050] For the above technical issues, please refer to Figure 2 The present solution also provides a tool changing control system for a machine tool, the machine tool comprising a power source 100, a tool-beating transmission mechanism 200, a spindle box 300 and a spindle 400, the spindle 400 being arranged on the spindle box 300, the power source 100 being drivingly connected to the spindle box 300, the tool-beating transmission mechanism 200 being used for controlling the tool changing of the spindle 400; the tool changing control system comprising an acquisition module 500, a judgment module 600 and an output module 700.

[0051] The acquisition module 500 has two functions. The first is to acquire the output characteristic range of the power source 100 under normal tool change conditions before machine tool processing, so that the standard value of the power source output characteristic range under normal tool change conditions can be determined. The second is to acquire the real-time output characteristics of the power source 100 during actual machine tool processing, so that the actual value of the power source output characteristics under actual tool change conditions can be determined.

[0052] Specifically, the acquisition module 500 is connected to the power source 100, and the acquisition module 500 is used to collect the real-time output characteristics of the power source 100 when the spindle 400 is at a predetermined position during the process from the start of the tool change action to the end of the tool change; it can be understood that the power source 100 is a motor, and the motor drives the spindle box 300 and the spindle 400 to move up and down along the Z axis, and the output characteristics of the power source 100 include at least one or more of the output torque, output power, speed, and load rate of the motor; it can be understood that during the normal tool change process of the spindle 400, the output torque, output power, speed, and load rate are a changing broken line, and the values ​​of different types of spindles may have a deviation of about 10%, but the repetition rate of the broken line of the output torque, output power, speed, and load rate of each type of spindle under normal tool change is relatively high. However, if an abnormal tool change occurs, the broken line of the output torque, output power, speed, and load rate of the spindle under abnormal tool change will be very different from the broken line under normal tool change, for example, the difference is about 30%. Therefore, when the difference between the values ​​of the output torque, output power, rotation speed, and load rate of the spindle during the actual tool change process and the values ​​of the output torque, output power, rotation speed, and load rate of the spindle during the normal tool change process is about 30%, or even exceeds more, the current actual tool change is abnormal. In this embodiment, the tool change abnormality includes two situations: tool change offset and unclamped tool on the spindle. It can be understood that in some other embodiments, the tool change abnormality may also include other situations, such as tool change offset and unclamped tool appearing simultaneously in a tool change process.

[0053] Please see Figure 5 The following is an introduction to the internal structure of the spindle 400, so that it is easy to understand how the spindle 400 clamps the tool. Since the spindle 400 has a pull rod 410, a disc spring 420 and a pull claw 430 inside, the disc spring 420 is in a state of tightening the pull rod 410 and the pull claw 430 when no external force is applied. The pull claw 430 clamps the tool handle under the pulling force of the disc spring 420, so that the spindle 400 clamps the tool and the spindle 400 can perform processing. When the power source 100 drives the spindle box 300 and the spindle 400 to cooperate with the knife-beating transmission mechanism 200, that is, when the knife-beating arm 220 is facing toward the knife-beating contact 210, the knife-beating arm 220 will squeeze the knife-beating bearing 230 on the spindle 400 downward, and the knife-beating bearing 230 drives the pull rod 410 to move downward, while offsetting the elastic force of the disc spring 420. When the pull rod 410 moves downward, it will also drive the pulling claw 430 to move downward. During the downward movement of the pulling claw 430, the space becomes larger and larger, and the pulling claw 430 will open. At this time, the clamping between the pulling claw 430 and the tool handle will be released, thereby allowing the tool to detach from the spindle 400. In this way, the tool to be replaced on the tool magazine 1100 can be clamped on the spindle 400 to realize the tool change of the spindle 400.

[0054] The predetermined position of the spindle 400 is introduced below. In this embodiment, the predetermined position of the spindle 400 includes at least two positions in the process of the spindle 400 running downward from the highest point of the tool change stroke to the end of the tool change, and the output characteristic range of the power source 100 includes the output characteristic range of the power source 100 when the spindle 400 is at the predetermined position. It can be understood that the tool change stroke includes a tool loosening process moving from the lowest point to the highest point and a tool clamping process running downward from the highest point to the end of the tool change. The following focuses on the tool clamping process of the tool change stroke.

[0055] Please see Figure 3 and Figure 4 For example, there are two preset positions of the spindle 400, and the two positions include a first preset position between a tool releasing position s and a tool clamping position j of the spindle 400 when the spindle 400 runs downward from the highest point of the tool changing stroke to the end of the tool changing. By collecting the real-time output characteristics of the power source 100 at the first preset position, it is possible to determine whether the tool changing of the spindle 400 is abnormal, and the abnormal state of the spindle 400 is tool changing offset.

[0056] For example, see Figure 3 When the knife arm 220 abuts against the higher position of the inclined portion of the knife bump block 210, and the top surface of the knife bearing 230 is located between the knife loosening position s and the knife clamping position j, if in the current state, the real-time output characteristic of the first preset position power source 100 is less than the minimum value of the output characteristic range of the power source 100 under normal tool change conditions, it is determined that the tool change of the spindle 400 is abnormal, and the abnormal state of the spindle 400 is tool change offset.

[0057] Please see Figure 4 , the second preset position between the tool clamping position j and the empty tool position k of the spindle 400, by collecting the real-time output characteristics of the power source 100 at the second preset position, it is possible to determine whether the tool change of the spindle 400 is abnormal, and the abnormal state of the spindle 400 is that there is no tool on the spindle after the tool change. It can be understood that the tool release position s is the reference position when the tool is released under normal tool change, the tool clamping position j is the reference position when the tool is clamped under normal tool change, and the empty tool position k is the reference position when the tool is not assembled under normal tool change.

[0058] For example, when the knife arm 220 abuts against the middle and low position of the inclined part of the knife bump block 210, and the top surface of the knife bearing 230 is located between the knife clamping position j and the empty knife position k, if in the current state, the real-time output characteristics of the second preset position power source 100 are greater than the maximum value of the output characteristic range of the power source 100 under normal tool change conditions, it is determined that the tool change of the spindle 400 is abnormal, and the abnormal state of the spindle 400 is that there is no tool on the spindle after the tool change.

[0059] In some other embodiments, in order to identify the state of the tool release stroke of the spindle 400 during the tool change process, the predetermined position of the spindle 400 also includes a third preset position between the empty tool position k and the tool clamping position j of the spindle 400 during the process of the spindle 400 moving upward from entering the tool change stroke to the highest point of the tool change stroke. By collecting the real-time output characteristics of the power source 100 at the third preset position, it is possible to determine whether a tool is installed on the spindle 400, that is, whether the spindle 400 is moving upward with the tool clamped, or the spindle 400 is moving upward without the tool clamped. The fourth preset position between the tool clamping position j and the tool release position s of the spindle 400 can be determined by collecting the real-time output characteristics of the power source 100 at the fourth preset position to determine whether the spindle 400 starts to release the tool when the tool is installed. And the fifth predetermined position before the spindle 400 enters the tool change stroke, by collecting the real-time output characteristics of the power source 100 at the fifth preset position, it can be determined whether the spindle 400 has completed the tool release action when equipped with a tool, that is, whether the tool that the spindle has processed has been completely detached from the spindle 400. By collecting the real-time output characteristics of the power source 100 at the third preset position, the fourth preset position and the fifth preset position, it can be detected whether the spindle 400 is equipped with a tool during the rising process, whether the spindle starts to release the tool normally after the tool is assembled, and whether the tool release ends normally after the spindle is equipped with a tool and starts to release the tool normally, so that the tool release stage of the tool change process can be detected, the entire tool change process can be fully detected, and the detection of the tool change process can be more refined.

[0060] The function of the judgment module 600 is to compare the real-time output characteristics of the power source 100 collected by the acquisition module 500 with the output characteristic range of the power source 100 under normal tool change conditions. In this embodiment, the judgment module 600 is connected to the acquisition module 500, and the judgment module 600 is used to generate a tool change result signal indicating whether the tool change is successful based on the real-time output characteristics of the power source 100 and the output characteristic range of the power source 100 under normal tool change conditions.

[0061] In order to conveniently store the information of the output characteristic range of the power source 100 under normal tool change conditions, the tool change control system further includes a control module 800 and a data storage module 900. 。

[0062] The control module 800 is used to output an alarm signal when receiving a signal indicating abnormal tool change, thereby promptly notifying the operator of abnormal tool change to avoid more serious losses. Specifically, the control module 800 is connected to the output module 700 and is used to generate an alarm signal according to the tool change result signal.

[0063] The data storage module 900 is connected to the judgment module 600, and is used to store the output characteristic range of the power source 100 under normal tool change. When the judgment module 600 enters the judgment logic, the data storage module 900 is called to collect the output characteristic range of the power source 100 under normal tool change. In addition, the operator can also conveniently store a new output characteristic range of the power source 100 under normal tool change through the data storage module 900, and can also conveniently change part of the output characteristic range of the power source 100 under normal tool change that has been stored through the data storage module 900.

[0064] It can be understood that in this embodiment, the judgment module 600 can be a comparator, which can compare the real-time output characteristics with the maximum and minimum values ​​of the output characteristics in the normal tool change state to determine whether the real-time output characteristics fall between the maximum and minimum values ​​of the output characteristics in the normal tool change state, or whether the real-time output characteristics are greater than the maximum value of the output characteristics in the normal tool change state, or whether the real-time output characteristics are less than the minimum value of the output characteristics in the normal tool change state.

[0065] The output module 700 is used to interact with the user and convey the tool change result signal to the user. In this embodiment, the output module 700 is connected to the judgment module 600, and the output module 700 is used to output the tool change result signal.

[0066] The tool changing control system of the above-mentioned machine tool, the machine tool includes a power source, a tool-beating transmission mechanism, a spindle box and a spindle, the spindle is arranged on the spindle box, the power source is drivingly connected to the spindle box, and the tool-beating transmission mechanism is used to control the tool changing of the spindle; the acquisition module acquires the real-time output characteristics of the power source when the spindle is at a predetermined position during the process from the start of the tool changing action to the end of the tool changing action; then the judgment module generates a tool changing result signal indicating whether the tool changing is successful based on the real-time output characteristics of the power source and the output characteristic range of the power source under normal tool changing conditions, and finally the tool changing result signal is output through the output module, so that the tool changing result can be output based on the comparison of the real-time output characteristics of the power source and the output characteristic range of the power source without adding too many structural elements, thereby improving the accuracy of the tool changing judgment.

[0067] The following is a detailed introduction to the structural matching parts on the machine tool that cooperate with the spindle 400 for tool changing. The machine tool also includes the above-mentioned tool changing control system. The tool-beating transmission mechanism 200 includes a tool-beating block 210 arranged on the column, a tool-beating arm 220 connected to the spindle box 300, and a tool-beating bearing 230 arranged on the spindle 400. The tool-beating block 210, the tool-beating arm 220 and the tool-beating bearing 230 cooperate to control the tool changing of the spindle 400.

[0068] In order to facilitate the operator to obtain the working status of the machine tool and know whether the current processing and tool changing status of the machine tool is normal or abnormal, so that the machine tool can respond in time when the tool changing status is abnormal. The machine tool also includes a machine tool controller and a display module. The machine tool controller is connected to the tool changing control system and is used to receive the tool changing result signal and control the continued processing, shutdown or alarm of the machine tool. The display module is connected to the machine tool controller and is used to display the tool changing result signal or the alarm signal corresponding to the tool changing result signal.

[0069] Please see Figure 6 In addition, the present invention also provides a tool changing control method for a machine tool, the machine tool comprising a power source 100, a tool-beating transmission mechanism 200, a spindle box 300 and a spindle 400, the spindle 400 being arranged on the spindle box 300, the power source 100 being drivingly connected to the spindle box 300, the tool-beating transmission mechanism 200 being used to control the tool changing of the spindle 400; the tool changing control method comprises the following steps S10-S50.

[0070] Step S10: Collect the real-time output characteristics of the power source 100 when the spindle 400 is at a predetermined position during the process from the start of the tool change action to the end of the tool change. The real-time output characteristics of the power source 100 are collected by the collection module 500. It can be understood that the collection module 500 has two functions. The first is to collect the output characteristic range of the power source 100 under normal tool change conditions before machine tool processing, so that the standard value of the power source output characteristic range under normal tool change conditions can be determined. The second is to collect the real-time output characteristics of the power source 100 during the actual processing of the machine tool, so that the actual value of the power source output characteristics under actual tool change conditions can be determined. The real-time output characteristics of the power source 100 are collected in step S10.

[0071] Step S30: generating a tool change result signal indicating whether the tool change is successful according to the real-time output characteristics of the power source 100 and the output characteristic range of the power source 100 under normal tool change conditions.

[0072] The following describes how to obtain the output characteristic range of the power source 100 under normal tool change conditions. The tool change control method for a machine tool also includes obtaining the output characteristic range of the power source 100 under normal tool change conditions, and the obtaining the output characteristic range of the power source 100 under normal tool change conditions specifically includes the following steps S31-S37.

[0073] Step S31: When the spindle 400 enters the tool change mode, the test tool is installed on the spindle 400. Specifically, when the spindle 400 enters the tool change mode, the test tool is installed on the spindle 400, wherein the spindle 400 includes a tool release position s, a tool clamping position j and an empty tool position k moving downward, and the tool change control method further includes steps S311-S313.

[0074] Step S311: When the power source 100 cooperates with the knife-beating transmission mechanism 200 and the spindle box 300 moves downward, a first preset position is selected between the knife-releasing position s and the knife-clamping position j of the spindle 400 to collect the real-time output characteristics of the power source 100.

[0075] Step S313: When the power source 100 cooperates with the knife transmission mechanism 200 and the spindle box 300 moves downward, a second preset position is selected between the knife clamping position j and the empty knife position k of the spindle 400 to collect the real-time output characteristics of the power source 100.

[0076] Step S33: After the test tool is installed on the spindle 400, a number of options are displayed through the display module; wherein the number of options at least include a tool change in place option and a tool change failure option for the user to select.

[0077] Step S35: receiving information of tool change completion or tool change failure selected by the user. For example, the display module may be a display touch screen, and the user touches the option of tool change completion on the display module.

[0078] Step S37: When receiving the information that the tool change is in place, collect the output characteristics of several groups of power sources 100, and determine the output characteristic range of the power source 100 according to the output characteristics of several groups of power sources 100. Specifically, save the output characteristics of the power source 100 when the spindle 400 is at the first preset position and the second preset position under normal tool change conditions for multiple times, so as to obtain the output characteristic range of the power source 100 under normal tool change conditions. Figure 3 , that is, when the knife arm 220 abuts against the higher position of the inclined portion of the knife bump block 210, and the top surface of the knife bearing 230 is located between the knife release position s and the knife clamping position j. Figure 4 , when the knife arm 220 abuts against the middle and low position of the inclined portion of the knife bump block 210, and the top surface of the knife bearing 230 is located between the knife clamping position j and the empty knife position k.

[0079] Step S50: outputting the tool change result signal. The output tool change result signal includes a normal signal and a tool change abnormal signal, wherein the tool change abnormal signal also includes two abnormalities: tool change offset and no tool on the spindle after tool change.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0081] The above examples are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A tool changing control system for a machine tool, the machine tool comprising a power source (100), a tool changing transmission mechanism (200), a spindle box (300) and a spindle (400), wherein the spindle (400) is arranged on the spindle box (300), the power source (100) is drivingly connected to the spindle box (300), and the tool changing transmission mechanism (200) is used for controlling the tool changing of the spindle (400); characterized in that: The tool changing control system comprises: A collection module (500) is connected to the power source (100) and is used to collect real-time output characteristics of the power source (100) when the spindle (400) is at a predetermined position during the process from the start of the tool change action to the end of the tool change action; A judgment module (600) is connected to the acquisition module (500) and is used to generate a tool change result signal indicating whether the tool change is successful based on the real-time output characteristics of the power source (100) and the output characteristic range of the power source (100) under normal tool change conditions; An output module (700) is connected to the judgment module (600) and is used to output the tool change result signal.

2. The tool change control system according to claim 1, characterized in that: The predetermined position of the spindle (400) includes at least two positions in the process of the spindle (400) running downward from the highest point of the tool change stroke to the end of the tool change; The power source (100) is a motor, and the output characteristics of the power source (100) include at least one or more of the output torque, output power, rotation speed, and load rate of the motor; The output characteristic range of the power source (100) includes the output characteristic range of the power source (100) when the main shaft (400) is at a predetermined position.

3. The tool change control system according to claim 2, characterized in that: The predetermined position of the spindle (400) includes a first predetermined position between a tool release position (s) and a tool clamping position (j) of the spindle (400) when the spindle (400) moves downward from the highest point of the tool change stroke to the end of the tool change, and a second predetermined position between the tool clamping position (j) and an empty tool position (k) of the spindle (400).

4. The tool changing control system according to claim 3, characterized in that: The predetermined position of the spindle (400) further includes a third predetermined position between an empty tool position (k) and a tool clamping position (j) of the spindle (400) during the process of the spindle (400) running upward from entering the tool changing stroke to the highest point of the tool changing stroke, a fourth predetermined position between the tool clamping position (j) and the tool releasing position (s) of the spindle (400), and a fifth predetermined position before the spindle (400) enters the tool changing stroke.

5. The tool changing control system according to any one of claims 1 to 4, characterized in that: It also includes a control module (800) and a data storage module (900), wherein the control module (800) is connected to the output module (700) and is used to generate an alarm signal according to the tool change result signal; and the data storage module (900) is connected to the judgment module (600) and is used to store the output characteristic range of the power source (100) under normal tool change conditions.

6. A machine tool, comprising a base, a column (1000), a power source (100), a knife-beating transmission mechanism (200), a spindle box (300), a spindle (400) and a tool magazine (1100), wherein the column (1000) is arranged on the base, the power source (100) is fixed on the column (1000), the spindle box (300) is slidably arranged on the column (1000), the spindle (400) is arranged on the spindle box (300), the power source (100) is drivingly connected to the spindle box (300), and the tool magazine (1100) is fixed above the column (1000), characterized in that: It also includes the tool changing control system according to any one of claims 1 to 5, wherein the tool-beating transmission mechanism (200) includes a tool-beating block (210) arranged on a column, a tool-beating arm (220) connected to the spindle box (300), and a tool-beating bearing (230) arranged on the spindle (400), and the tool-beating block (210), the tool-beating arm (220) and the tool-beating bearing (230) cooperate to control the tool changing of the spindle (400).

7. The machine tool according to claim 6, characterized in that It also includes a machine tool controller and a display module. The machine tool controller is connected to the tool change control system and is used to receive the tool change result signal and control the continued processing, shutdown or alarm of the machine tool. The display module is connected to the machine tool controller and is used to display the tool change result signal or the alarm signal corresponding to the tool change result signal.

8. A tool changing control method for a machine tool, the machine tool comprising a power source (100), a tool-beating transmission mechanism (200), a spindle box (300) and a spindle (400), wherein the spindle (400) is arranged on the spindle box (300), the power source (100) is drivingly connected to the spindle box (300), and the tool-beating transmission mechanism (200) is used to control the tool changing of the spindle (400); characterized in that: The tool changing control method comprises: Collecting the real-time output characteristics of the power source (100) when the spindle (400) is at a predetermined position during the process from the start of the tool change action to the end of the tool change action; Generating a tool change result signal indicating whether the tool change is successful according to the real-time output characteristics of the power source (100) and the output characteristic range of the power source (100) under normal tool change conditions; Output the tool change result signal.

9. The tool change control method for a machine tool according to claim 8, characterized in that: The method further includes obtaining an output characteristic range of the power source (100) under normal tool change conditions, wherein obtaining the output characteristic range of the power source (100) under normal tool change conditions specifically includes: When the spindle (400) enters a tool change mode, a test tool is installed on the spindle (400); When the test tool is installed on the spindle (400), a number of options are displayed through the display module; wherein the number of options at least include a tool change in place option and a tool change failure option for the user to select; Receive information on tool change completion or tool change failure selected by the user; When information that the tool has been changed is received, output characteristics of a plurality of power sources (100) are collected, and the output characteristic range of the power source (100) is determined according to the output characteristics of the plurality of power sources (100).

10. The tool change control method for a machine tool according to claim 9, characterized in that: When the spindle (400) enters a tool change mode, a test tool is installed on the spindle (400), wherein the spindle (400) includes a tool release position (s) moving downward, a tool clamping position (j) and an empty tool position (k), and the tool change control method further includes: When the power source (100) cooperates with the knife-beating transmission mechanism (200) and the main shaft box (300) moves downward, a first preset position is selected between the knife-releasing position (s) and the knife-clamping position (j) of the main shaft (400), and the real-time output characteristics of the power source (100) are collected; When the power source (100) cooperates with the knife-beating transmission mechanism (200) and the main spindle box (300) moves downward, a second preset position is selected between the knife clamping position (j) and the knife-free position (k) of the main spindle (400), and real-time output characteristics of the power source (100) are collected; The output characteristics of the power source (100) when the spindle (400) is at a first preset position and a second preset position under normal tool change conditions are saved multiple times, thereby obtaining the output characteristic range of the power source (100) under normal tool change conditions.

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